31 results about "Valve seat" patented technology

The invention discloses a self-operated three-way reversal valve. The reversal valve comprises a valve body, and a first piston, a second piston, a sliding guide and a sliding block which are arranged in the valve body, and a spring. A valve seat, an adaptor tube C, an adaptor tube E and an adaptor tube D which are arranged on the valve body form a receiving cavity together with a low-pressure capillary tube and a high-pressure capillary tube. The sliding block is arranged on the valve seat. The sliding guide is fixed with the sliding block. The sliding guide is connected with the first piston and the second piston to form a piston and sliding guide assembly which can move axially in the valve body. The spring is arranged between the second piston and a left end cap. The sliding block is provided with a radially limiting structure in the valve body. The radially limiting structure is as follows: the sliding block comprises a transverse structure and a vertical structure arranged above the transverse structure; and the bottom of the transverse structure is closely attached to the valve seat; a top surface of the vertical structure of the sliding block has a longitudinal groove; and top surfaces of twp convex parts of a convex shape of the groove are closely attached an inner wall of the valve body. The structure of the valve can improve heat tube circulation refrigeration efficiency and is high in efficiency and energy-saving.

A powder valve is propose which is simple in structure and small in size, which can prevent powder from getting stuck in the valve, and can withstand high feed pressure. The valve includes a valve casing 21, a valve shaft 25, and a valve body 22 mounted in the valve casing 21 and supported by the valve shaft 25. The valve body 22 has a spherical outer surface 27 configured to be brought into contact with a valve seat 23 of the valve casing 21 to close the valve. The valve body 22 is formed with a communication hole 26 extending in a direction perpendicular to the valve shaft 25 so that when the valve body 22 is rotated about the valve shaft 25 in either of two opposite directions from the closed position, the valve is configured to open through the communication hole 26. The communication hole 26 is open on the back side of the valve body 22 over the entire length thereof. With this arrangement, it is possible to ensure the advantages of a ball valve, i.e. full-bore properties and high rigidity. Since the pressure of powder flowing through the communication hole 26 acts on the inner periphery of the valve casing 21, the flow of powder blows off and removes any powder which could otherwise get stuck on the inner periphery of the valve casing 21. By rotating the valve body 22 in both directions, powder can be removed on both sides of the valve shaft 25.

The invention discloses an integrated Dewar applied to a linear pulse tube refrigerator and a method for manufacturing the integrated Dewar. The integrated Dewar comprises a regenerator section, a cold head section and a pulse tube section; the three sections are connected with one another by bolts, the regenerator section is connected with a regenerator hot-end heat exchanger, and the pulse tube section is laterally sealed by a chuck and is connected with a pulse tube section hot-end heat exchanger; a working face is pressed on a cold face of a cold head by Z-shaped supports of embedding groove structures of annular platforms on end surfaces of the regenerator section and the pulse tube section; and the regenerator section is provided with a lead pin, and a middle section is provided with a window and a bleeder valve seat. The integrated Dewar and the method have the advantages that the integrated Dewar is of a triple-section structure and can be coupled with the linear pulse tube refrigerator advantageously, and most parts of the working face directly cling to the cold head, so that cold transmission loss is reduced; the integrated Dewar is applied to the linear pulse tube refrigerator, the linear pulse tube refrigerator is coupled with a cooled device by the aid of the integrated Dewar, and accordingly the integrated Dewar has an extremely positive significance in the aspect of improving the practicality of the linear pulse tube refrigerator.

A female coupler comprises a valve support accommodated in a hole portion of the injection port and comprising a projecting portion having a axial hole, a cylindrical coupler main body placed around the projecting portion and comprising a locking projecting portion on an inner peripheral surface, a part of the main body being embedded in the injection port so as to have its position fixed, a base valve accommodated in the main body and having an fitting insertion portion inserted into the axial hole and a valve seat portion placed on the projecting portion, the fitting insertion portion and the valve seat portion being connected together, a bar-like portion projected from the valve seat portion and having valve grooves formed on a peripheral surface, and an deformable packing member placed on the valve seat portion and accommodating the bar-like portion, the packing member being fixedly retained in the main body.

A method for bounce suppression of a valve member operated by a piezo actuator during the closing phase of a valve in an internal combustion engine, having the following steps: partial discharging of the piezo actuator, whereby the valve member is braked even before reaching the valve seat, interruption of the discharge of the piezo actuator, whereby the piezo actuator is upset by the valve member and builds up an electric charge, renewed discharging of the piezo actuator, the residual charge after partial discharge and the charge built up during the charge interruption being at least partially dissipated. It is provided, according to the present invention, briefly to interrupt the discharge process, whereby the piezo actuator absorbs the energy of the valve member and, even before an elastic rebound takes place, the piezo actuator is discharged again, in order to dissipate the energy absorbed by the piezo actuator.

The present flow rate safety valve comprises a valve body, a valve seat, a valve core and a spring. The valve core is an open cylinder. A sealing washer is set up on the front end of the valve core. Part of the rim of the sealing washer contacts the inner wall of the valve body, forming a seal and guiding the valve core in the axial direction of the valve body. A projecting sealing part is arranged on the valve seat, and the inner wall at the rear end of the valve core is a conical surface which extends from the rear end face to the middle part of the valve core and forms a guide for the conical sealing part. Inside an outflow pipe of the valve body, a backflow preventer is arranged in order to prevent the medium backflow.

The invention relates to an inflator structure. A folding space is arranged in an inflation rod of the inflator structure, and is used for positioning or separating a hose with double-specification charging connectors from one end of the inflation rod; a valve seat at the bottom part of the inflation rod is connected with the hose; one end of the hose is provided with a joint seat and a muff-coupling block; the rotary charging connectors at both ends of the hose with the double-specification charging connectors can be respectively connected with the joint seat; the muff-coupling block is used for casing the hose with the double-specification rotary charging connectors onto the rotary charging connectors to be positioned after the hose is positioned at one end of the inflation rod, so that the hose is cased and supported by the muff-coupling block to be positioned at one side of the inflator structure after being folded; and the hose with the double-specification charging connectors can be correspondingly replaced and connected onto the joint seat for matching according to different specifications of a cranked tire valve. Simultaneously, the inflator structure has an effect of prolonging length, thereby, the inflator structure has a reduced occupied size when being stored, and the inflator structure is convenient to fold.

The invention discloses a micro-flow accurate control type proportional electromagnetic valve comprising an inlet connector, a valve body-coil assembly, an outer magnetizer, an armature assembly, a valve seat assembly, an outlet connector, a first shell and a second shell. The first shell and the second shell are connected. The valve body-coil assembly, the outer magnetizer and the armature assembly are all arranged in an internal space formed by the first shell and the second shell. The valve body-coil assembly is connected with the armature assembly. The outer magnetizer is arranged outsidethe valve body-coil assembly in a sleeving manner. The inlet connector is connected with the valve body-coil assembly. One end face of the outlet connector is connected with the armature assembly in acompression manner. The side wall of the outlet connector is connected with the second shell. The valve seat assembly is arranged in the outlet connector. One end of the armature assembly is embeddedinto the valve seat assembly. The micro-flow accurate control type proportional electromagnetic valve can achieve the function of high-precision pressure and flow continuous output control and effectively guarantee reliable work of an electric propulsion system.

The invention provides a turbine front-and-back pressure difference control type low-pressure circulating system in the technical field of mechanical design. The turbine front-and-back pressure difference control type low-pressure circulating system comprises a gas compressor, an engine, a turbine, connecting pipes, a valve seat, a valve body, a rotating shaft, a containing cavity, a fixed body, penetrating pipes, a partition board, a rotating body and a connecting board. One end of the rotating body extends into the first penetrating pipe and is in sealing contact with the wall face of the first penetrating pipe, the other end of the rotating body is fixedly combined with the partition board, the two ends of the first connecting pipe are communicated with a gas inlet of the containing cavity and a gas exhausting pipe of the turbine respectively, and the two ends of the second connecting pipe are communicated with a gas outlet of the containing cavity and a gas inlet pipe of the gas compressor respectively. When the front-and-back pressure difference of the turbine is large, the rotating body drives the valve body to rotate clockwise, the low-pressure gas exhausting recirculation rate of the engine is large, and the detonation pressure of the engine is low. The turbine front-and-back pressure difference control type low-pressure circulating system is reasonable in design, simple in structure and suitable for a low-pressure gas exhausting recirculation system of a supercharged engine.

The invention discloses a top assembling type ball valve capable of achieving on-line disassembly and assembly. The top assembling type ball valve comprises a valve body, a valve deck, a ball body, valve seats, a valve rod and a valve driving device. The outer circumferential surface of each valve seat is of a high-low stepped shape. The diameter of an inner end stepped surface of each valve seat is smaller than that of an outer end stepped surface of each valve seat. Sealing rings are arranged between the outer end stepped surfaces of the valve seats and the valve body. Pressing plates are arranged between the inner end stepped surfaces of the valve seats and the valve body in a clamping mode. The sealing rings are respectively arranged between the pressing plates and the inner end stepped surfaces of the valve seats and between the pressing plates and the valve body. Through holes are formed in portions, corresponding to the valve seats, of the valve body. The inner ends of the through holes are communicated to the inner end stepped surfaces of the valve seats. Sealing pieces are fixedly arranged at the outer ends of the through holes. Airtight cavities are respectively formed between the through holes, the inner end stepped surfaces of the valve seats, and the pressing plates. By the adoption of the structure, the ball valve can achieve on-line disassembly, assembly and maintenance and facilitates ball valve on-line operation of a user.

The invention discloses a variable damping valve. The valve comprises a valve body and an electromagnet assembly, a first oil port and a second oil port are formed in the valve body, a valve seat is arranged in the valve body, a valve element is movably connected in the valve body, a spring is connected between the valve element and the valve body, a plurality of oil passing holes communicated with the second oil port are formed in the valve seat in the circumferential direction, and a movable seat is movably arranged in the valve seat; and the valve element is fixedly connected with an ejector rod, the ejector rod is fixedly connected with the movable seat, the outer wall of the movable seat is partially attached to the oil passing holes to block the oil passing holes, an adjusting opening is formed at the left end of the movable seat, and the adjusting opening and the oil passing holes are at least partially aligned so that the first oil port can be communicated with the second oil port through the adjusting opening and the oil passing holes. The adjusting opening and the oil passing holes are in a staggered position state, so that the adjusting opening and the oil passing holes are disconnected, the first oil port and the second oil port are disconnected, and the movable seat translates to enable the adjusting opening and the oil passing holes to be switched between the two states. According to the variable damping valve, it can be ensured that the flow can be adjusted in the opening and closing process of the damping valve.

A valve element opening/closing device may include a valve element for opening and closing an opening part, a drive mechanism for operating the valve element, and a motor for the drive mechanism. The drive mechanism may include a cam engagement part formed in the valve element, and a cam member rotationally driven by the motor. A cam face is formed in the cam member to be inclined to a direction of a rotation center axis of the cam member and engaged with the cam engagement part, and a turning preventing part restricting turning of the valve element is provided to move the valve element linearly. Further, the opening part may include a hollow pipe, a plate provided with a mounting hole into which the pipe is inserted, and a valve seat. The valve seat is provided with a projecting part and the brazing material is restricted to flow out to an abutting face of the valve seat by the projecting part.

The invention provides an eccentric two-way sealing butterfly valve. The valve seat of the butterfly valve consists of an independent floating valve seat and O-shaped seal rings on the floating valve seat to form a new sealing pair, wherein the side face and the bottom of the valve seat are provided with plastic or rubber O-shaped seal rings. The eccentric two-way sealing butterfly valve has the advantages that the valve can bear pressure (within 1.25 times the nominal pressure) which is applied by a medium from any side; and the aim of preventing the medium from reflowing can be fulfilled by arranging one eccentric two-way pressure butterfly valve on a pipeline and not arranging a check valve or other two-way pressure valves.

The invention relates to a gate valve which comprises a valve body, a gate plate, a valve rod, a valve deck, a bracket and a hand wheel, wherein a V-shaped valve seat is manufactured in the passage ofthe valve body; planes on two sides of the gate plate form a V-shaped sealing surface matched with the V-shaped valve seat; a corrugated pipe sealing device is arranged between the valve rod mainly in the middle cavity of the valve body and the valve body and is composed of a corrugated pipe and a bowl-shaped diaphragm; the lower end of the corrugated pipe is welded on the excircle surface of thevalve rod in a sealing manner; the upper end of the corrugated pipe is connected with the edge of the central hole of the bowl-shaped diaphragm in a sealing manner; the upper and lower planes of theouter periphery of the bowl-shaped diaphragm are sealed between the valve body and the valve deck in a press fitting manner; and an annular elastic compensation groove is formed in the center of the outer periphery of the gate plate in the peripheral direction. The middle cavity is high in sealing property; and the gate plate has the elastic compensation function to effectively prevent the gate plate from being clamped at a high temperature and from leakage at a low temperature.

The invention is a volume control valve for controlling and metering a fluid in a motor vehicle, comprising a tappet with an actuating end and a free end, said tappet being received in a bearing bush and mounted along its actuating axis so as to be movable back and forth, and a seat valve which is connected to a fluid channel and arranged relative to the tappet in such a way that the free end of the tappet can engage in the valve seat and close the fluid channel when it is engaged in said valve seat, and further comprising a pressure spring which is arranged along the longitudinal axis of the tappet. According to the invention, a welded plate is fastened and/or welded and/or formed on the tappet with the pressure spring arranged thereon, which is supported on the welded plate and the bearing bush.

The invention discloses an automatic hard alloy welding tool for a valve seat. The automatic hard alloy welding tool comprises a workbench, wherein the upper surface of the workbench is fixedly connected with a supporting block; a cavity is arranged in the supporting block; a dual-axis rotation motor is arranged in the cavity; upper and lower sides of the dual-axis rotation motor are fixedly connected with upper and lower sides of the cavity separately; two output ends of the dual-axis rotation motor are fixedly connected with threaded rods through shaft couplers; ends, away from the dual-axisrotation motor, of the threaded rods are in threaded connection with threaded barrels; tops of the threaded barrels are fixedly connected with first supporting rods; strip-shaped openings which correspond to the first supporting rods are formed in the top of the cavity; opposite sides of the two first supporting rods are fixedly connected with arc-shaped clamping blocks; a first groove is formedin the upper surface of the workbench; and the right side of the first groove is fixedly connected with an electric pushing rod. The automatic hard alloy welding tool can precisely push the valve seatinto a valve rod to weld, can conveniently position the valve body, and prevents the valve body from shaking.

A numerical control proportional valve is composed of an aluminium valve seat, an electromagnetic valve, an air valve element, an air valve element pressing plate, an echo switch, a gear and a stepping motor. When the echo switch is switched off, the air valve element driven by the gear is just placed at the closed position or at the position where a small amount of air flow is provided for a fire grate at the moment. When the opening degree of the air valve element reaches 20% or 30%, only the number of corresponding stepping pulses is provided for the motor.

The invention discloses a membrane pad type solenoid valve. The membrane pad type solenoid valve comprises a valve seat, a valve body, a movable iron core, movable iron core springs, guide bushings, coils, a membrane pad spring and a membrane pad, wherein the valve body is mounted on the valve seat; the coils are mounted in the valve body; the guide bushings are arranged in the middle of the coils; the movable iron core is arranged in the guide bushings; the top part of the movable iron core is connected with a fixed iron core of the valve body through the movable iron core springs; a baffle plate is arranged in the valve seat; a valve seat groove is formed in the upper part of the baffle plate; the membrane pad is positioned in the valve seat groove and is fixed by the valve body and thevalve seat; the membrane pad spring is connected with the membrane pad and the valve body; a control outlet is formed in the valve seat arranged between the baffle plate and the outlet and is blockedby the membrane pad in a working state; pressure release channels are arranged on the valve seat and the valve body; inlet ends of the pressure release channels are positioned on an inlet-sided valveseat body of the valve seat and is connected with the valve seat groove and a pressure release channel outlet formed in an outlet-sided valve seat body positioned on the valve seat through an internalchannel of the valve body. According to the membrane pad type solenoid valve disclosed by the invention, the solenoid valve can be normally used under high pressure and low pressure, the water outputquantity is extremely great, the sealing property is great, and the performance and using range of a product are greatly promoted.

The invention relates to a shut-off valve for liquid or gaseous media, comprising a valve housing (12), which has at least one passage opening (14), which connects an inlet opening (21) to an outlet opening (16), a valve seat (17), which is arranged on the valve housing (12) and surrounds the passage hole (14) and can be closed by a valve closing element (31) lying directly in contact, which are arranged in a control chamber (22) formed in the valve housing (12) between the inlet opening (21) and the outlet opening (16), a drive (35), which can be connected to the valve housing (12) and which actuates the valve closing element (31) in order to open or close the passage hole (14), and a restoring element (33), which acts against a closing or opening motion of the valve closing element (31), wherein the drive (35) has at least one setting element (39) made of a shape-memory alloy in order to actuate the opening or closing motion of the valve closing element (31), and the drive (35) is separated from the control chamber (22) by a sealing element (24).

The invention discloses a vertical cutting plugging device. The vertical cutting plugging device comprises an inspection well foundation; an inspection well pipeline is arranged in the inspection well foundation; an opening of the inspection well pipeline is formed in the surface of the inspection well foundation or is projected at the surface of the inspection well foundation; the vertical cutting plugging device further comprises a valve seat, a spherical crown which is tightly matched with the valve seat and an eccentric rotating device; the valve seat is fixed at the opening of the inspection well pipeline; the eccentric rotating device comprises an eccentric main shaft; one end of the eccentric main shaft is connected with the spherical crown, and the other end of the eccentric main shaft is connected with an output end of a driving transmission device; the driving transmission device is positioned outside the inspection well foundation; the axis of the eccentric main shaft is positioned at the vertical direction; the axis of a rotating shaft of the eccentric main shaft is not intersecting with a center line of a passageway. The eccentric rotating device is vertically arranged; the driving transmission device is above the liquid level, even the driving transmission device is arranged above the ground, so that workers can operate on ground, the driving transmission device is avoided from being soaked and damaged in water; the device is convenient for the workers to operate; even for manual operation, underwater operation can be avoided for submariners.

The invention discloses an underground liquid sampling tool. The underground liquid sampling tool comprises an upper joint, a sample pipe, a valve seat, a one-way ball valve, a connecting sleeve, a sealing pipe, a shearing pipe and a positioning head, wherein the upper joint is linked with the sample pipe; the sample pipe is linked with the valve seat provided with a runner; the one-way ball valveis arranged on the upper end surface of the valve seat and is communicated with the runner; the connecting sleeve is connected with the valve seat; the sealing pipe is arranged in the connecting sleeve, is connected with the valve seat and is communicated with the runner; the shearing pipe is arranged in the connecting sleeve and sleeves on the sealing pipe, is provided with step-shaped inner holes with large and small inner diameters and is matched with the sealing pipe; a first channel is formed in the sealing pipe; a sealing surface is formed between the sealing pipe and the inner holes with the small inner diameters of the shearing pipe; a second channel is formed in the pipe wall on the inner hole with the large inner diameter; and the shearing pipe is positioned on the connecting sleeve through a shearing pin and is connected with the positioning head. The underground liquid sampling tool can accurately arrive at a preset position so as to acquire a pressure-maintaining and retained ample from underground liquid. The underground liquid sampling tool is simple, effective, accurate and reliable.