17 results about "Internal pressure" patented technology

A pneumatic tire for airplanes that assures a good high-speed durability and wear characteristics without its excellent durability against foreign object being impaired is provided. The number of plies of the main belt layer 26 is substantially continuously decreased from the crown center part P0 to the shoulder part, and if the circumferential rigidity in the crown center part P0 of the main belt layer 26 and the circumferential rigidity of the main belt layer 26 at the position P2 which provides ⅔ of the width of the main belt layer 26 are M0 and M2, respectively, the ratio M2/M0 between both is set at a value greater than 0.2 and smaller than 0.8, whereby, while the quantity of materials used for the main belt layer 26 being minimized, the amount of the tread rubber circumferential elongation in the tread central region at the time of air filling to a prescribed internal pressure and at the time of high speed revolution can be efficiently suppressed for suppressing the radial growth of the tire. Because the amount of circumferential elongation of the tread rubber layer 24 is suppressed, and thus the degree of tension of the tread rubber layer 24 is lowered, the resistance to penetration of a foreign object is increased, and even if a foreign object should stick into the tire, the growth of the crack can be suppressed.

An Explosion Proof Vehicle (EPV) having an interior substantially filled with an inert fluid creating an interior pressure greater than the exterior pressure. One or more flexible tubes provide the inert fluid and one or more electrical conductors from a control system to the vehicle. The vehicle is preferably used in subsurface tank inspection, whereby the vehicle is submerged in a volatile fluid.

The present invention provides a hybrid inflator which easily controls the amount of outflow of a pressurized medium or the like is provided. Part of a plurality of nozzles 166 positioned in a flow-passage of a pressurized medium or the like are closed by a tape 160 to be ruptured due to increase of an internal pressure. When the internal pressure is low, the tape 160 is not ruptured, but when the internal pressure is high, the tape 160 is ruptured. Therefore, the opening area of the nozzles 166 are changed in accordance with the change in internal pressure so that the amount of the outflow of the pressurized medium and the like can be controlled.

The present invention is a novel passive adjustable gravity compensation apparatus which utilizes an internal-pressure-variable cylinder. With the coordination of cam, rod, or the combination of the fore mentioned, the internal-pressure-variable cylinder obtains the characteristics of a linear elastic device which has variable elastic coefficient. Through appropriately adjusting the internal pressure of the internal-pressure-variable cylinder, the cylinder would perform as a linear elastic device with proper elastic coefficient to fully or partially compensate the gravitational effect of the manipulator system and the load it holds. Thus, the proposed invention can fully or partially compensate the gravitational effect of the manipulator system at different loading conditions without changing its geometric configuration.

The invention discloses a detection device for a bolt load and a pad compacting force of flange connection. The detection device is used for detecting the bolt load and the pad compacting force on a flange connection device. The detection device comprises an electronic sensor arranged between a bolt and a flange; a processor; and a display. The processor is connected with the electronic sensor and the display and is used for receiving data detected by the electronic sensor, calculating the bolt load and the pad compacting force according to the detected data, and controlling the display to display the bolt load and the pad compacting force. In this way, the bolt load and the pad compacting force can be visually checked when a nut is tightened, and the detection device and method solve the technical problems in the prior art that a determined bolt pre-tightening force may not obtain an expected pad compacting force after an internal pressure is applied, and the bolt pre-tightening force cannot be applied precisely.

The invention discloses a crystal expander, which comprises a base, an inner pressure ring, an outer pressure ring and a limit mechanism. The upper end of the base is provided with a lower pressure plate, the edge of the lower pressure plate is hinged with an upper pressure plate, and the connection between the lower pressure plate and the upper pressure plate is There is a locking mechanism between the upper platen and the middle of the lower platen. There is a round hole corresponding to the middle of the lower platen. The base is provided with a circular crystal expansion plate. There is a heating device inside the disk, steps are arranged around the edge of the upper surface of the expansion disk, the inner ring of the inner pressure ring matches the steps, the inner ring of the outer pressure ring matches the outer ring of the inner pressure ring, and the limit mechanism includes The support rod is vertically arranged on the base, and the limit plate is horizontally rotatable arranged on the top of the support rod. The edge of the lower pressing plate is extended with a mounting plate. The locking mechanism includes a four-bar mechanism and a pressing block arranged on the mounting plate. . The crystal expander of the present invention has the advantages of simple structure, precise control of the expansion degree of the wafer, and the like.

The invention discloses a safe pressure relieving and anti-creeping device for a water heater. The safe pressure relieving and anti-creeping device comprises a valve and a pipe. A water inlet channeland an outer pressure relieving channel are formed in the valve, and an inner relieving valve assembly used for balancing the pressure in the water heater is arranged in the water inlet channel. An outer relieving valve assembly used for water heater over-pressure protection is arranged in the outer pressure relieving channel. A water pipe plug matched with the pipe is arranged at the top end of the pipe, and the pipe and the water pipe plug are made of isolating materials. The main purposes of the safe pressure relieving and anti-creeping device are that the valve and the pipe are both made of the isolating materials, the isolating materials are isolated from electricity and meanwhile are low in heat conductivity coefficient, thus the anti-creeping safe protection function is achieved, amain structure is formed through a mold, the high heat resistance is also achieved in the aspect of the material characteristic, and the purposes of energy conservation and heat preservation are achieved. Meanwhile, the safe pressure relieving and anti-creeping device is provided with the inner relieving valve assembly and the outer relieving valve assembly, thus the safe pressure relieving function is achieved, the secondary pressure relieving effect can be achieved structurally, and thus practicability of pressure relieving is enhanced greatly.

The invention discloses a super large diameter multiple ultrahigh pressure jet grouting construction method. The method includes the following steps: adopting a hole guiding drilling machine to guidea hole at a point to be grouted; after hole formation, lowering a drilling tool of a rotary jet machine to the bottom of the hole, wherein the lower end of the drilling tool is provided with two spraying sections, respectively an upper spraying section and a lower spraying section; operating the rotary jet machine, lifting the drilling tool and enabling the upper spraying section and the lower spraying section to spray cement slurry to the outside to form a rotary jet grouting pile around the drilling tool. The method has the advantages that the upper spraying section and the lower spraying section are arranged on the drilling tool, and the cement slurry is sprayed in the drilling tool lifting process and dilutes the slurry in the cutting mode. At the same time, the rotary jet spraying pile reliable in quality is formed around the drilling tool, the internal pressure stability is effectively controlled, and the grouting quality and efficiency are ensured.

The invention discloses spinning gauze lossless drying equipment. The spinning gauze lossless drying equipment comprises an equipment body, a support roller, hot air nozzles and a condensation pipe; a first rotating roller is arranged on the inner side, near a gauze inlet, of the equipment body, and a second rotating roller is arranged on the other side of the equipment body opposite to the first rotating roller; the support roller is arranged in the equipment body; air heaters are respectively fixed at the top of an upper cavity and the bottom of a lower cavity; the hot air nozzles are arranged on the inner sides of the upper cavity and the lower cavity; the condensation pipe is fixed at the top of the upper cavity; a communicating pipe is arranged at the bottom of the horizontal part of the condensation pipe; and a water tank is fixed at the top of the equipment body opposite to the horizontal part of the condensation pipe. As the hot air nozzles are arranged in the equipment body, gauze is uniformly heated, the drying effect of spinning gauze is improved, and the burn of the gauze is prevented; the condensation pipe is arranged at the top of the upper cavity for exhausting water vapor in the equipment; and an exhaust port can balance the internal pressure of the equipment to prolong the life thereof.

Said invention refers to reducing power type column sealed zinc nickel alkaline accumulator internal pressure method. It features after processing superfine graphite or active carbon, using 0.5-5 per cent sodium polyacrylates aqueous solution to make colloidal graphite or active carbon emulsion, then spray coating on zinc cathode surface, after drying assembling with relevant nickel electrode and diaphragm to power type column sealed zinc nickel alkaline accumulator. Said invented method made accumulator has not gas and liquid leakage through different multiplying factor charge and discharging and service life circulation by more than 100 times.

The invention discloses a packing method for encapsulated food, particularly relates to a packing method for liquid canned food.. The technological process is as follows: a proper amount of assistant (sugar or salt) is added to vacuum-encapsulated liquid food; after vacuum treatment, the liquid food is loaded in a vacuum material concentrating chamber of a gas-liquid separated type spraying tank through a valve port; and interlayer air is drained and inert gas is pressed in to form internal pressure. The method has the characteristic that an only-outlet-no-inlet packing method is adopted in a natural environment, so that external air and pollutants can not enter into the packing container, thereby achieving the purposes of repeated opening and long-time fresh-keeping.

The invention discloses a method for collecting a gas sample and/or a liquid sample in an anaerobic fermentation system. The method comprises the following steps: hermetically connecting a three-way pipe with the outlet of the anaerobic fermentation system through a pipeline, and collecting samples through the following step (1) and/or step (2), wherein in the step (1) the on and off of the three-way pipeline is controlled to ensure that the inlet pipeline of the three-way pipe is communicated with at least one outlet pipeline and the outlet pipeline of the three-way pipe is connected with a gas collecting device, so that the collection of gas samples in the anaerobic fermentation system is realized; in the step (2), the on and off of the three-way pipe is controlled to ensure that the inlet pipeline of the three-way pipe is communicated with one outlet pipeline while the outlet pipeline of the three-way pipe is communicated with an injector, and when a piston of the injector is pulled to the predetermined scale, liquid samples in the anaerobic fermentation system are sucked into the injector under the action of the difference of the internal pressure and the external pressure of the piston. The method provided by the invention adopts the medical three-way pipe to collect the gas and liquid samples in the anaerobic fermentation process, and can be widely applied to sampling analysis of gas and liquid components in the research process of precision experiments of generating biogas through anaerobic fermentation.