49results about How to "Easy to install and remove" patented technology

The invention discloses an electrical terminal with an insulating protective cover. The electrical terminal comprises a terminal body and a mounting cover, wherein the mounting cover is arranged on the terminal body in a sleeving mode; a movable groove is formed in the inner wall of the mounting cover; a positioning rod is fixedly connected to the inside of the movable groove through a torsion spring; one end of the positioning rod is located in a positioning groove; the positioning groove is formed in the outer side of the terminal body; a guide groove is formed in the outer side of the middle of the positioning rod; a guide ball is mounted in the guide groove; the guide ball is connected with a pull rod; the pull rod is located in a limiting groove; the limiting groove is formed in the inner side of the mounting cover; the limiting groove communicates with the movable groove; a pay-off groove is reserved in the edge of the bottom of the mounting cover; a fixed piece is connected to the inner wall of the pay-off groove; and a reset spring is fixed between the inner side of the fixed piece and the inner wall of the pay-off groove. According to the electrical terminal with the insulating protective cover, the insulating protective cover can be conveniently mounted and dismounted, and meanwhile, a circuit can be fixed and protected.

The invention discloses a deep well pump fixing frame in the technical field of mining equipment. The deep well pump fixing frame comprises a base, five limiting rings and a supporting device; the five limiting rings are transversely welded to the top of the base at equal intervals; and the supporting device is welded to the top of the base, and the supporting device is located on the outer sidesof the five limiting rings. The deep well pump fixing frame is simple in structure, strong in practicability, small in occupied space convenient to place and take out; the deep well pump fixing framecan be placed at the appropriate position anytime and anywhere, and maintenance and replacement are facilitated; two longitudinal plates and a transverse plate are welded into the H-shaped base, the five limiting rings are transversely welded on the transverse plate at equal intervals, the bottom of a deep well pump is placed through the limiting rings, and it can be ensured that the deep well pump is stable and free of movement; fixed rings and movable rings are used for fixing the outer wall of the deep water pump and are connected through shaft pins, free opening and clamping can be achieved, and the maintained or to-be-repaired deep well pump can be placed and taken out of the fixing frame at any time.

The invention provides a simulation experimental pipeline device of multi-phase fluid erosion and flow states. The simulation experimental pipeline device comprises a pipeline, a bracket, an erosion resistant storage tank, an erosion resistant pump, a ball valve, an electromagnetic flow meter, a resistance probe, a temperature meter, a pH meter and an oxygen dissolving analyzer, wherein the pipeline comprises an waved pipeline erosion test area and a horizontal pipeline erosion test area. The waved pipeline is simulated through the simulation experimental pipeline device with various inclined angles; the change of erosion rates is recorded in real time by virtue of the resistance probe; an annular sample of which the diameter is the same with the inner diameter of the pipeline is adopted in the horizontal pipeline area. A weight loss method and an electrochemical method are used for monitoring the internal erosion of the pipeline, and the flow states and the multi-phase fluid erosion at an industrial site can be truly simulated, so that the technical problem that the flow characteristic and erosion behavior in a flowing pipeline at an industrial site cannot be truly reflected through indoor dynamic erosion simulation is solved.

The invention discloses a welded pipe end straightness online detection device, belonging to the technical field of welding control, and comprising a detection mechanism, a detection arm, a pedestal mechanism and a base mechanism, wherein the pedestal mechanism is arranged at the upper part of the base mechanism, the detection arm is arranged at the side surface of the pedestal mechanism, the two ends of the detection arm are respectively connected with the detection mechanism and the pedestal mechanism, the detection mechanism is positioned right above a welded pipe to be detected, and the detection mechanism, the detection arm and the pedestal mechanism are all positioned at the same side of the base mechanism. The invention is the online detection device which can substitute a manual visual inspection method to detect, and realize end straightness online automatic detection of welded pipes with different specifications.

The invention discloses a wall-mounted air conditioner convenient to mount and clean, and relates to the technical field of household appliances. The wall-mounted air conditioner comprises a machine body, a mounting mechanism, a dust baffle and an adjusting mechanism, one side of the machine body is fixedly connected with the outer wall of the mounting mechanism, the two ends of the dust baffle are rotatably connected with the inner side wall of the machine body, one end of the adjusting mechanism is slidably connected with the outer wall of the dust baffle, the dust baffle comprises a first baffle, a second baffle and a clamping strip, the right end of the first baffle is fixedly connected with the left end of the clamping strip, and a clamping groove is formed in the inner wall of the second baffle. The dust baffle is connected together through the adjusting mechanism, an adjusting block arranged on the adjusting mechanism can conveniently adjust the overall distance of the dust baffle, the dust baffle can be adjusted to be installed or detached easily, a micro motor and a gear plate are combined, the machine body installed on a supporting device can be controlled to ascend and descend by a distance, and the dust baffle on the machine body is convenient to disassemble.

The invention discloses a novel slitting roller and relates to a shearing device. The slitting roller comprises an eccentric roller and a roller wheel, wherein the eccentric roller and the roller wheel are arranged up and down and rotate oppositely; the eccentric roller is provided with a gap, and a blade is fixedly mounted at the gap. According to the novel slitting roller, shearing inertia of the eccentric roller can be effectively utilized to improve the shearing effect and passing ability of plates; meanwhile, in the plate shearing process, shearing of the plates is assisted by the eccentric roller and self-gravity, so that the shearing effect is better, and the service life of the roller wheel is prolonged; besides, the novel slitting roller is small in size and convenient to move and install.

The invention discloses a pressure guide insulating device for an experimental body under high temperature and high pressure and a mounting method of the pressure guide insulating device; the pressureguide insulating device comprises two pressure guide threaded tube connectors, center holes of the two pressure guide threaded tube connectors are arranged face to face, a pressure guide insulating pad is arranged between the two pressure guide threaded tube connectors, the pressure guide insulating pad is provided with a center through hole mating with the center holes, the outer wall of each pressure guide threaded tube connector is provided with a pressure guide threaded flange, a high-temperature insulating gasket is arranged in the threaded hole of each pressure guide threaded flange close to an instrument pressure guide tube and the experimental tube, a pressure guide gasket is arranged at an end of each high-temperature insulating gasket, and pressure guide fastening bolts are passed through bolt holes of the two pressure guide threaded flanges so that the two threaded tube connectors are fixed. Insulated pressure guide is achieved for the experimental body where the pressure guide tube is in direct contact with an electric heating part, pressure and pressure difference of a passage can be accurately measured during experimenting on the experimental body under high temperature and high pressure, and insulating property of the experimental body is never destroyed.

The invention discloses a steaming box for food processing. The steaming box comprises a stand and a box body which is arranged on the stand, wherein spraying pipes are arranged at the top of the box body, a drainage pipe is arranged on the side of the box body, and a circulating steam pipe is additionally arranged at the top of the box body; the circulating steam pipe is communicated with the bottom of the box body; net cages for accommodating food raw materials are arranged inside the box body, and the multiple net cages are uniformly arranged in the horizontal direction of the box body; cover plates with seal rings are respectively arranged at the left end and the right end of the box body; and the cover plates are detachably connected to the box body. The invention aims at providing a steaming box for food processing to solve the problem that an existing steaming box is great in processing losses and large in heat energy consumption during working.

The invention belongs to the technical field of irrigation equipment, and aims to solve the problems that existing jet irrigation equipment is difficult to realize constant-pressure quantitative output of a water solution, cannot perform spray irrigation on multiple places at one time, is low in irrigation efficiency, is difficult to adjust the spray irrigation angle of a spray head, and is poor in overall use effect. The invention relates to a jet water-saving irrigation equipment with quantitative and constant-pressure functions, which comprises a water storage tank, a pressure stabilizing chamber is formed in the water storage tank and located above the water storage tank, a pressure stabilizing assembly is installed in the pressure stabilizing chamber, a first conveying pipe communicates with a dispersion pipe, and multiple sets of rotatable hollow lantern rings are installed on the dispersion pipe; and the rotatable hollow lantern ring is connected with the spray pipe assembly through the automatic sealing assembly. By arranging the pressure stabilizing assembly and a first flow sensor, constant-pressure and quantitative irrigation is achieved, by arranging the dispersing pipe and the multiple sets of rotatable hollow lantern rings, sprinkling irrigation operation on multiple positions can be achieved at a time, the sprinkling irrigation range is remarkably widened, the operation efficiency is remarkably improved, and the overall using effect of the equipment is good.

The invention relates to the technical field of electric power, and discloses a lightning arrester used for a transformer substation. The device includes an installation base, the top of the installation base is fixedly provided with a hollow support column, and the top of the hollow support column is fixedly provided with a sealing bottom plate. When the lightning arrester used for the transformer substation is connected with a ground wire, the ground wire is clamped between a jig and an L-shaped jig, since the L-shaped jig is fixed, the ground wire can squeeze the movable jig, and a conductive needle thus can be inserted in a clamp groove on the bottom of a conductive rod; in this way, thunder and lightning can be introduced in a thunder-and-lightning introduction core through a main lightning receiving rod and a secondary lightning receiving rod, then thunder and lightning are transmitted to the conductive needle through the conductive rod, and thunder and lightning can be introduced underground through the ground wire. When the ground wire is taken down, a spring and a limiting block make the conductive needle separated from the inside of the clamp groove of the conductive rod,then the conductive function of the device can be broken, in this way, installation and dismantling of the ground wire are effectively facilitated, and the installation efficiency of the ground wireis improved.

The invention discloses a basketball training jammer, which comprises a machine body, wherein a first mounting cavity, a second mounting cavity and a transmission cavity are sequentially formed in themachine body from top to bottom, a servo motor is fixed in the transmission cavity, the output end of the servo motor is connected with a speed reducer, a ball passing interference mechanism is arranged in the second mounting cavity, and a ball pitching interference mechanism is arranged in the first mounting cavity; the ball passing interference mechanism comprises a moving plate, connecting rods are fixed to the left end and the right end of the moving plate, and ball passing interference rods are connected to the outer sides of the lower ends of the connecting rods; and the ball pitching interference mechanism comprises two take-up wheels and two sleeves, and ball pitching interference rods are embedded in the two sleeves. By arranging the ball passing interference mechanism and the ball pitching interference mechanism, training pressure is generated, so that the shooting training effect and the ball passing training effect of athletes are improved, and the level of the athletes isimproved.

The invention discloses a bar chair with rotation function. The bar chair comprises a chair supporting wood rack (1) with a circular truncated cone structure, the middle part of the chair supporting wood rack (1) is provided with a connecting circular ring (2), a rotary stool surface (3) is arranged on the chair supporting wood rack (1), and a cushion (4) is arranged on the rotary stool surface (3); the chair supporting wood rack (1) comprises four supporting legs (5) which are arranged in a circular truncated cone structure, a support plate (6) is arranged on the supporting legs (5), the support plate (6) is provided with screwed holes (7), and a non-skid mat is arranged below the supporting legs (5). The product has characteristics of installation convenience and usage security improvement.

The invention provides a tobacco processing tank bottom sealing device. The tobacco processing tank bottom sealing device comprises a sealing cloth, a load-bearing block, a second installation block,bolts, a second fixing block, magnetic strips and a sealing strip. The upper end of the sealing strip is pasted to the lower end of a first installation block; the load-bearing block is arranged at the lower end of a tank body; the load-bearing block is connected with the first installation block by the sealing cloth; the second installation block is arranged at the right end of the annular lateral face of the tank body; the bolts are mounted at the second fixing block; the second fixing block is welded to the front end of the second installation block; the second fixing block is connected with a first fixing block by the bolts; the magnetic strips are mounted on the rear portion of the sealing cloth; the sealing strip is mounted in the first installation block; and the sealing strip is attached to the tank body. Through the design, a gap at the bottom of the tank body can be conveniently sealed, and assembly and disassembly are convenient; and application is convenient, sealing of thegap at the bottom of the tank body is convenient, assembly and disassembly are convenient, and reliability is high.

The invention discloses an LED spot lamp convenient to demount and mount. The LED spot lamp comprises a pressing ring (1), a lens (2), a light reflection shell (3), an LED module (4), a driving power source (5), an inner mounting seat (6) and an outer mounting seat (7), a clamp mechanism (8) is arranged on the outer mounting seat (7), the upper portion of the inner mounting seat (6) is connected in the outer mounting seat (7) in a sleeved manner, a sliding groove (9) is formed in the outer wall of the inner mounting seat (6), the clamp mechanism (8) is slidably connected with the sliding groove (9), the driving power source (5) is mounted on the inner mounting seat (6), the LED module (4) is mounted in the light reflection shell (3) and electrically connected with the driving power source (5), and the lens (2) is positioned on the light reflection shell (3) through the pressing ring (1). On the basis that quick mounting and demounting is realized, mounting holes can be effectively protected from being damaged. The LED spot lamp has the advantage of simple structure.

The invention discloses an electronic water pump with an active cooling channel. Aiming at the problems that the cooling for automotive electronic water pump motors in the prior art is passive cooling, the cooling effect is common and more heat is consumed, the electronic water pump comprises a base; a double-shaft motor is mounted at the top end of the base; one output shaft of the double-shaft motor is in transmission connection with a pump body; the other output shaft of the double-shaft motor is in transmission connection with a mounting seat; mounting grooves are formed around the mounting seat; fixed grooves are formed in both two sides of the mounting slots; first springs are fixed on the inner walls of the fixed grooves; limiting blocks are fixed on one ends of the first springs; and mounting blocks are arranged in the mounting slots. The electronic water pump is novel in design, ingenious in structure, simple to operate, convenient to mount or dismount protection covers, convenient to mount or dismount fan blades and strong in flexibility, is capable of satisfying the daily using requirements of people, and is beneficial for popularization and application.

The invention discloses a self-loading and self-unloading bidirectional driving device for an automobile container. The device comprises a box body, a base, a movable plate and a loading rack; an inner cavity is formed in the base; two groups of hydraulic cylinders are fixedly mounted in the inner cavity; three groups of mounting frames are fixedly mounted between the peripheries of the two groupsof hydraulic cylinders and the inner cavity; two movable grooves are formed in the surface of the top of the base; a connecting table is fixedly mounted at one end of each hydraulic cylinder and located in a movable groove; a movable plate is fixedly mounted on the surface of the base at the top of each connecting table; two sliding holes are formed in the surface of each movable plate; and two rotating shafts are rotatably mounted in the movable plates between the sliding holes. By arranging a series of structures, the device has the bidirectional power driving capacity in the using process,the friction force generated when the surface of the device makes contact with the container can be reduced, the overall stability of the device is high, the limiting effect is good, and the using process is optimized.

The invention discloses an auxiliary platform for construction of an underwater concrete vertical column. The auxiliary platform comprises an overwater bearing platform located on the water surface, arectangular construction operation channel is formed in the middle of the overwater bearing platform, hole excavating equipment for excavating a foundation hole for vertical column pouring construction is arranged at the top of the rectangular construction operation channel, and four sets of fence fixing devices are arranged at the four edges of the bottom of the rectangular construction operation channel correspondingly. The overwater bearing platform is arranged on the water surface, then the through rectangular construction operation channel is formed in the middle of the overwater bearingplatform, the hole excavating equipment is fixed to the center of the top of the rectangular construction operation channel, the four sets of fence fixing devices are arranged at the four edges of the bottom of the rectangular construction operation channel correspondingly, a water cofferdam for construction is formed through the four sets of fence fixing devices, the cofferdam is rapidly constructed on the overwater bearing platform by workers, through the construction mode of a fence, a large number of labor cost can be saved, the fence is quite convenient to mount and demount, and the construction period is greatly shortened.

The invention discloses a stable and durable packer, which comprises a packer body, a locking joint and a fastening layer. The inside of the packer body constitutes a passage cavity. The packer body includes a packer middle cylinder arranged in the middle and packer ports located at the two ends of the packer middle cylinder. Annular slots are respectively formed in the two ends of the circumferential outer wall of the packer middle cylinder, and annular steel plates are installed in the annular slots. The lower halves of the two groups of annular steel plates are welded and fixed to the circumferential outer wall of the packer middle cylinder, and the packer middle cylinder between the two groups of annular steel plates is sleeved with the fastening layer. The fastening layer includes a wear-resisting layer, an insulating layer and a buffer layer which are integrally formed. According to the stable and durable packer, the installation and disassembly of the fastening layer on the packer body are facilitated, certain wear resistance and collision resistance can be provided, and the service life of the packer body is prolonged.

The invention relates to a periphery-closed type shield for a needle of a sewing machine. The sewing machine comprises a machine base, a machine arm and a machine head, wherein the machine base extends longitudinally; the machine arm transversally extends at the top end of the machine base; the machine head extends downwards at one end of the machine arm; the bottom end of the machine head is provided with a needle bar extending longitudinally; and the bottom end of the needle bar is provided with the needle. The periphery-closed type shield for the needle of the sewing machine is characterized by comprising closed side faces and both open ends, and a cylindrical space is formed in the shield. A broken needle is prevented from flying off from all directions by the shield, and thus, safer all-direction protection is offered. The shield is connected with the machine head of the sewing machine through a particular insertion-hanging mode, therefore, not only is the stability ensured but also the installation and the detachment are convenient and operations of replacing the needle and threading an upper thread can be conveniently and smoothly performed. By installing solar cell light-emitting diode (LED) lamps, the luminance of the space in the shield is enhanced, therefore, an operator can conveniently observe and control the sewing condition; the space is saved; the energy is saved and the environment is protected.

The invention discloses an evaporator coil coiler for a refrigerator. The evaporator coil coiler for the refrigerator is characterized in that the evaporator coil coiler comprises a rotatable workbench panel and a base; a pipe fixer and multiple sets of slidable guiding components are arranged on the workbench panel; each set of the guiding components includes a mold column which comprises a plurality of ring grooves and is annularly distributed on the workbench panel; The guiding component comprises the mold column, a fixed seat and a support rod, wherein the fixed seat is fixed on the workbench panel, and the support rod is slidably placed in the middle of the fixed seat; the outer end of the support rod is connected with the mold column, while the outer end of the same leans against a limiting part of the adjustable support rod so that an evaporating coil can be removed by simply sliding the mold column without having to remove a coil component.

The invention relates to the technical field of torsion springs, in particular to a torsion spring with a double-layer protection surface structure, which comprises a torsion spring body and arc-shaped protection plates, the outer side of the torsion spring body is covered with an anti-oxidation layer, the outer side surface of the anti-oxidation layer is covered with wear-resistant layers, the number of the wear-resistant layers is two, and the number of the arc-shaped protection plates is two. A groove is formed in the surface of the arc-shaped protection plate, the groove and the arc-shaped protection plate are integrally designed, two first sliding grooves are formed in the groove, the first sliding grooves and the arc-shaped protection plate are integrally designed, telescopic structures are slidably installed in the first sliding grooves, and second sliding grooves are formed in the outer side of the arc-shaped protection plate. The second sliding groove and the arc-shaped protection plate are integrally designed. The torsion spring can be protected, oxidation abrasion of the torsion spring is prevented, the service life of the torsion spring is prolonged, and the torsion spring can be prevented from being integrally bent in the using process.

The quick release structure comprises a first connecting piece, a second connecting piece and a magnet, the second connecting piece is provided with a first containing cavity and a second containing cavity, and the first connecting piece can be inserted into the first containing cavity and the second containing cavity; the first connecting piece comprises a clamping piece, and the clamping piece is rotatably arranged at the front end of the first connecting piece; the magnet is arranged in the second containing cavity in a sliding mode, and the magnet is used for magnetically attracting the clamping piece to rotate from the first containing cavity to the second containing cavity and clamped with the clamping part in the second containing cavity so that the first connecting piece and the second connecting piece can be connected and locked. The magnet is further used for being stressed to slide so that the clamping piece can rotate from the second containing cavity to the first containing cavity, and therefore the first connecting piece and the second connecting piece can be unlocked. The quick release structure has the advantages of being small in size, simple in structure and quick and convenient to assemble and disassemble. In addition, the invention also discloses a wearable device.

The invention discloses a sliding computer door of a computer case. The sliding computer door comprises a computer main body, wherein sliding chutes are arranged in two ends of an inner cavity of the computer main body; an end door is arranged in each sliding chute through a slide block; an electronic drive device is arranged in an inner cavity of each end door; an electronic fixing device is arranged at one end of each electronic drive device and is located in the corresponding sliding chute; a clamping device is arranged at the upper end of each end door; connection blocks are arranged at two ends of each clamping device; a control device is arranged in the inner cavity of the computer main body; and an output end of the control device is electrically connected with input ends of the electronic drive devices and the electronic fixing devices separately. The sliding computer door is simple in use and convenient and fast to install, use by a user is facilitated and the user has good convenience in the using process.

The invention provides a steel structure installation engineering detection device which comprises a supporting column and a detection device body, the top end of the supporting column is fixedly connected with a bedplate, the top end of the bedplate is fixedly connected with the detection device body, the bottom end of the supporting column is rotatably connected with supporting legs, one side of the top of the bedplate is rotatably connected with a hand wheel, a clamping groove is formed in the middle of the top end of the bedplate in a penetrating mode, side grooves are fixedly formed in the two sides of the inner wall of the clamping groove, a triangular groove is fixedly formed in the front face of the inner wall of the clamping groove, a guide rail is fixedly arranged on the back face of the clamping groove, a clamping plate is slidably connected with the surface of the guide rail, the end of the hand wheel is rotationally connected with a lead screw through a bearing, the middle of the lead screw penetrates through the bottom of the clamping plate, the lead screw is rotationally connected with the inner wall of the bottom of the guide rail, the detection device of the steel structure installation engineering detection device can be separated from the supporting column, and the detection device can be conveniently transported and protected.

The invention relates to an insulating and lightning protection combination device. The combination device comprises: a bottom plate assembly which comprises a rectangular bottom plate; an insulating plate attached to one surface of the bottom plate; a plurality of lightning protection device fixing devices arranged on the insulating plate; a lightning protection device fixed in the lightning protection device fixing device; and a protective cover covering the surface, where the lightning protection device is located, of the bottom plate. A group of opposite side edges of the bottom plate are respectively provided with a line concentration plate which extends towards one surface without the insulating plate, and a series of hole combinations are arranged in the line concentration plates. Compared with like devices in the prior art, the combination device has the advantages that the lightning protection device is insulated from the whole lightning protection combination device through the insulating plate, other additional modes are not needed, the lightning protection combination device is convenient to install and detach, when the lightning protection combination device and other devices are installed together, the appearance uniformity of the whole height flush is kept, the screws can be made of the same metal material, and the cost is reduced.

The invention provides a collet counterweight device of an elevator and a counterweight mounting structure applying the same. The collet counterweight device comprises a counterweight rack, a counterweight group, a counterweight diversion sheave, a counterweight weight, a counterweight guide shoe and an oil cup. A bearing beam is arranged below the counterweight rack, and a plurality of counterweight cavities are formed above the bearing beam; the counterweight group is arranged in each counterweight cavity; the counterweight weight is detachably and slidably arranged on the counterweight rackfor compressing the counterweight group; and the counterweight diversion sheave is arranged below the counterweight rack. The demand on the beam on the counterweight rack is reduced, the cost is lowered, the counterweight mounting space in the counterweight rack can be utilized effectively and fully, and meanwhile, it is convenient to mount and detach the counterweight group. A condition that a traction steel wire rope and a steel wire wheel are separated in the counterweight mounting structure can be prevented effectively.

The invention discloses a novel connector terminal composite molding structure and a molding method. The structure comprises a lower die floating bottom, a forming sliding block and a forming male. Aproduct containing part used for containing a product is arranged at one end of the top of the lower die floating bottom, a positioning sliding block is arranged at the end, opposite to the product containing part, of the top of the lower die floating bottom, and the forming male is arranged on the upper portion of the lower die floating bottom. According to the novel connector terminal compositemolding structure provided by the technical scheme of the invention, the bending molding angle of a product is convenient to adjust, the structure is suitable for molding connectors with different bending angles of terminals, the universality is realized, and the production cost is further reduced. The surface of the terminal is slightly scratched, so that the surface quality of the connector is improved. The forming structure is low in maintenance rate, continuous production can be guaranteed, and then the production efficiency is improved. The forming direction process is simple, the steps are few, the product precision can be improved, and the product quality stability is guaranteed.

The invention discloses an indoor lighting ceiling lamp convenient to clean and detach. The indoor lighting ceiling lamp comprises a ceiling lamp fixing base. Fixing sliding grooves are mounted in theinner side of a frame on one side of the lower portion in the ceiling lamp fixing base, fixing hooks are mounted in the fixing sliding grooves, long-strip-shaped crystal curtains are mounted on the fixing hooks, first mounting fixing shells are mounted at the middle position of one side of the lower portion in the ceiling lamp fixing base, connecting pipes are mounted on the lower portions in thefirst mounting fixing shells, small star crystal lamps are mounted at the lower ends of the connecting pipes, lamp bulbs are mounted at the middle positions in the small star crystal lamps, and firstLED lighting lamps are mounted at the two ends of the middle position of one side of the lower portion in the ceiling lamp fixing base. A cleaning rolling brush is slidingly connected with the ceiling lamp fixing base, dust on second LED lighting lamps and third LED lighting lamps at the middle position can be cleaned away through the cleaning rolling brush, and operation is convenient.