19results about How to "Reduce pressure difference" patented technology

The utility model relates to the field of ball valves, and particularly discloses a valve seat sealing structure for a ball valve. The valve seat sealing structure for the ball valve comprises a valve body, a ball body installed in the valve body, a valve rod installed at the upper end of the valve body, valve seats installed on the two sides of the ball body and a valve deck fixedly installed at one end of the valve body, a positioning groove used for allowing one valve seat to be inserted is formed in the inner wall of one end of the ball body, and the outer sides of the two valve seats are each provided with two installation grooves. The inner wall of each installation groove is connected with a sealing ring, a sealing groove is formed in the side, close to the ball body, of each valve seat, a sealing gasket connected with the ball body is installed on the inner wall of each sealing groove, a limiting groove used for allowing the other valve seat to be inserted in is formed in the inner wall of one side of the valve deck, and one end of the valve body is fixedly connected with a plurality of fasteners used for fixing the valve deck. The damage risk caused by too high pressure or uneven stress of the sealing piece can be effectively reduced, so that the sealing performance and reliability of the ball valve are improved, and the service life of the sealing piece is prolonged.

A gas processing system includes a vessel (102) defining a cavity (106) for processing a gas. The vessel includes a process gas inlet (108) for receiving a process gas at an input pressure and a process gas outlet (110) for discharging the process gas at an output pressure. The gas processing system also includes a shaft (122) coupled to the vessel and a stepwise sealing system (114) including a plurality of seals (136) spaced along the shaft. The shaft is configured to transfer mechanical energy to or from the gas in the vessel. Each adjacent pair of seals defines a corresponding pressure space therebetween. One of the pressure spaces is an equalization pressure space (144a) in hydraulic communication with the process gas inlet via a flow line (116) such that, in operation, a pressure in the equalization pressure space is maintained at an equalization pressure relative to a pressure in the process gas inlet.

The present disclosure relates to a screw compressor and a refrigeration system, wherein the screw compressor comprises a body (1) comprising a first slot body (11) extending along a preset direction (x), a slide valve limiting component (2) comprising a supporting piece (21) connected to the body (1) and a limiting piece (22) extending along the preset direction (x) and comprising a first part (221) and a second part (222), the first part (221) extending out of the supporting piece (21) and being located in the first slot body (11), and the second part (222) being arranged on the supporting piece (21), and a slide valve (3) movably connected to the limiting piece (22) along the preset direction (x).

The application discloses a high-temperature co-electrolysis cell stack module structure and relates to the technical field of fuel cells, which comprises an electric pile group and a pipeline assembly; the electric pile group comprises six electric piles which are arranged in a regular hexagon around a central position and are left empty in the central position; the electric pile comprises a top plate and a bottom plate, and the top plate and the bottom plate are in a regular hexagon structure; the electric pile further comprises four groups of stretching assemblies, the stretching assembly comprises a pull rod and a spring, and the spring is in a stretching state; the pipeline assembly comprises an air inlet pipeline and an air outlet pipeline; the gas entering a total gas inlet is shunted to the first gas inlets of the six electric piles, and the gas entering a total air inlet is shunted to the first air inlets of the six electric piles; the air outlet pipeline comprises a total gas outlet and a total air outlet, and the gas flowing out of the first gas outlets and the first air outlets of the six electric piles is respectively converged to the total gas outlet and the total air outlet. The application adopts a honeycomb six-pile ring arrangement structure, and the compactness and the modularization level of the system are significantly improved.

The valve with the differential pressure compensation structure comprises a valve body, a first handle is installed on the valve body, two connecting pipes are symmetrically and fixedly communicated with the valve body, and the differential pressure compensation mechanism is installed on the valve body; the differential pressure compensation mechanism comprises a liquid inlet pipe and a liquid outlet pipe which are fixedly communicated with the two connecting pipes respectively, mounting holes are formed in the two connecting pipes, and the liquid inlet pipe and the liquid outlet pipe are fixedly connected into the two mounting holes respectively. Oil on one side of the valve body can be supplied to the other side of the valve body in advance, so that the pressure difference between the two sides of the valve body can be reduced, the pressure on the two sides of the valve body is gradually equal, the resistance when the valve body is opened can be reduced, and the valve opening convenience is effectively improved; and the problem that a hydraulic system is greatly impacted due to the fact that the pressure difference between the two sides of the valve is too large can be solved, and the practical safety of the hydraulic system is effectively improved.

The utility model relates to the field of valves, and particularly discloses a pilot-operated gate valve which comprises a main valve, a valve rod is rotatably connected in the main valve, a valve plate is slidably connected in the main valve, and a pilot-operated valve is connected below the main valve. The pilot valve comprises a valve body, the upper end of the valve body is fixedly connected with connecting pipes, the connecting pipes are communicated with the interior of the main valve, and the connecting pipes are located on the two sides of the valve plate. By designing the pilot valve, fluid on one side of the valve body can be conveyed to the other side of the valve body when the internal pressure of the valve body reaches customization, the pressure difference of the two sides is reduced, the friction force generated when the valve plate ascends is reduced, and the valve plate can be conveniently opened. By designing the plate spring and the sealing blocks, when the spring needs to be detached and replaced, the valve plate continues to move downwards, so that the plate spring can be driven to deform to push the sealing blocks on the two sides to seal the connecting pipe, the valve body can be opened to replace the spring, and the service life of the pilot valve is prolonged.

This utility model discloses a precision-drilled multilayer circuit board, belonging to the field of multilayer circuit boards. It includes a circuit board and rivets. Each rivet comprises a linkage structure, a clearance groove, a limiting ring, a riveting groove, an outer protective ring, an assembly ring, a riveting plate, a riveting connecting rod, an inner pressure ring, a snap-fit ​​groove, and a through groove. Through the combination of the outer protective ring and the limiting ring, and the inner riveting groove and the riveting plate, stacked rivets can be achieved. Each rivet can independently press the circuit board through the limiting ring, ensuring the stability between circuit board layers and improving interlayer positioning accuracy. Simultaneously, it reduces the pressure difference between layers, thereby reducing deformation caused by uneven interlayer stress, ensuring the accuracy of subsequent drilling, etc. It is not limited by the number or thickness of layers, allows for convenient assembly, and eliminates the need for multiple sets of riveting holes, saving circuit board space. During riveting, a single riveting connecting rod can drive all assembled rivets to be riveted simultaneously, eliminating the need for multiple riveting operations, ensuring stability while improving production efficiency.

The invention relates to the technical field of oil well pumps, in particular to a plunger type oil well pump for oil field exploitation. Comprising a pump cylinder, a fixed valve seat is detachably connected to the lower end of the pump cylinder, a fixed valve is placed in the fixed valve seat, a traveling valve seat is slidably connected to the interior of the pump cylinder in a sealed mode, a traveling valve is placed in the traveling valve seat, an installation cylinder is slidably connected to the interior of the traveling valve seat, and a lower positioning frame is fixedly connected to the inner side of the installation cylinder; the lower positioning frame makes contact with the lower portion of the traveling valve, and the mounting cylinder drives the traveling valve to move through the lower positioning frame. The installation cylinder actively controls the traveling valve to move and controls the traveling valve to actively relieve blocking of the traveling valve seat in the down-stroke period, so that when crude oil containing natural gas is extracted, the pressure difference needed by opening of the traveling valve seat is reduced, the invalid stroke generated due to gas compression is shortened, the effective liquid drainage stroke length of the plunger is prolonged, and the safety performance of the plunger is improved. And the fullness coefficient and the oil pumping efficiency of the pump are improved.

This utility model relates to the technical field of insulated glass, and discloses a sealed insulated glass unit comprising two glass plates with a certain gap between them, the gap being filled with an inert gas. A long, narrow spacer strip is disposed along the edges of the two glass plates within the gap. The two ends of the spacer strip are respectively bonded to the two glass plates with butyl adhesive. A silicone sealant block is connected to the side of the spacer strip facing away from the inert gas, and the two ends of the silicone sealant block are bonded to the two glass plates with butyl adhesive. A gap filled with butyl adhesive exists between the silicone sealant block and the spacer strip. This utility model aims to solve the technical problems of fogging, condensation, and water retention in insulated glass due to poor sealing performance.

This utility model proposes an open-circuit protection device for a steering gear rack quenching inductor, relating to the field of heat treatment technology. It includes a quenching device and a protection device. The quenching device has a first electrode and a second electrode spaced apart. The protection device includes a first conductive bus, a second conductive bus, and a spiral coil. One end of the first conductive bus is electrically connected to the first electrode, and one end of the second conductive bus is electrically connected to the second electrode. The other ends of the first and second conductive buses are respectively used to connect to a power supply. Both ends of the spiral coil are electrically connected to the first and second conductive buses, respectively. The impedance of the spiral coil is greater than the impedance of the working circuit formed by the first electrode, the steering gear rack, and the second electrode. By connecting a high-impedance spiral coil in parallel with the electrode circuit, an automatically switching dual path is formed: during normal operation, the current flows through the electrode-rack path; during open circuit, the current automatically switches to the spiral coil path, effectively limiting the current and suppressing overvoltage and overcurrent, thus protecting the power supply components.

The protection structure comprises an inflation valve, the vacuum arc-extinguishing chamber comprises an arc-extinguishing chamber shell, a movable end cover plate, a movable conducting rod, the corrugated pipe and a conducting seat, the conducting seat comprises a medium-voltage cavity and an inflation connector, the conducting seat is fixed at the outer end of the movable end cover plate, an opening of the medium-voltage cavity faces the movable end cover plate, and the movable end cover plate is fixed on the movable end cover plate. The connection part of the conductive seat and the movable end cover plate comprises a sealing ring; the movable conducting rod penetrates through the medium-voltage cavity and the guide hole of the conducting seat, a conducting ring is arranged in an annular groove in the hole wall of the guide hole, and the inner wall of the conducting ring is in sliding contact with the movable conducting rod; the inflation connector is located on the outer wall of the conductive base and comprises an inflation hole, and the inflation valve is installed on the inflation connector. According to the utility model, the middle-pressure gas is filled into the middle-pressure cavity of the conductive seat, so that the pressure difference inside and outside the arc extinguishing chamber can be reduced. The corrugated pipe is uniform in stress, the mechanical life is prolonged, an additional static corrugated pipe does not need to be added, the structure is simplified, and the machining difficulty and cost are reduced.

The utility model belongs to the technical field of distributors, and particularly relates to a flow guide distributor. The flow guide distributor comprises at least two distribution pieces; the at least two distribution parts are partially arranged in the material conveying pipe and communicated with the material conveying pipe, the at least two distribution parts and the material conveying pipe are coaxially arranged, and projections of every two adjacent distribution parts on the material conveying pipe are at least partially overlapped in the radial direction of the material conveying pipe; wherein in the radial direction of the material conveying pipe, every two adjacent distribution pieces are arranged in a spaced mode to form a first intercepting flow channel, the distribution piece located on the outermost side of the at least two distribution pieces in the radial direction of the material conveying pipe is the first distribution piece, and the first distribution piece and the inner wall of the material conveying pipe are arranged in a spaced mode to form a second intercepting flow channel.

The present disclosure relates to the technical field of batteries, and discloses a single battery and a battery pack; the single battery comprises a pole member, a battery cell and at least two groups of welding connection groups; the battery cell comprises a battery cell main body and a tab, and the tab is connected to the battery cell main body; each welding connection group comprises at least two welding connection structures, and the welding connection structures are connected between the pole member and the tab; the minimum distance between two adjacent welding connection groups is a, the minimum distance between the farthest two welding connection structures in the same welding connection group is d, and the value of a×d is greater than or equal to 4 mm 2 less than or equal to 68 mm 2 The single battery guarantees the overcurrent capacity between the welding connection structure and the tab, reduces the heat generation, and avoids thermal runaway due to serious heat generation during charging and discharging.

The utility model relates to a kind of multifunctional automated non-saturated soil triaxial permeability test device, including triaxial chamber, confining pressure exerting system, axial force exerting system, gas pressure exerting system and water pressure exerting system and control acquisition system;Triaxial chamber includes loading frame and glass cylinder, loading frame blocks and packs glass cylinder upper and lower ends, and the loading frame in glass cylinder is set up sample on, and the upper and lower ends of sample are provided with pottery plate;Confining pressure exerting system respectively through loading frame bottom and top, and with glass cylinder inner cavity communication;Axial force exerting system is tightly pressed to the pottery plate above sample downwards;Gas pressure exerting system passes through loading frame bottom, and respectively with the upper and lower ends of sample communication;Water pressure exerting system passes through loading frame top, with glass cylinder inner cavity communication, and pass through loading frame bottom, respectively with two pottery plate communication;The utility model realizes the multifunctionalization of non-saturated test instrument, is conducive to the study of non-saturated soil physical mechanics property.

The application relates to a hydrogen fuel cell air supply system flow resistance optimization method, in which ambient air is sequentially introduced into an air filter, an air compressor and a intercooler, heat exchange is carried out in the intercooler; a first part of the air after the heat exchange passes through a fuel cell package and a valve; meanwhile, a second part of the air flows through a fuel cell stack container cavity, a flow resistance element and an exhaust throttle valve; meanwhile, a third part of the air passes through an electric control three-way valve, the three parts of the air are finally mixed in a mixed exhaust pipeline, and are discharged into the environment again after noise reduction through a silencer. Compared with the prior art, the application meets the requirements of air temperature, air pressure, air flow and relative humidity of the air inlet of the fuel cell stack through the coordinated control of the exhaust throttle valve, the air compressor and the electric control three-way valve, reduces the pressure difference between the dry side of a humidifier and the wet side of the humidifier, and reduces the sensitivity of the air pressure and the air flow of the air inlet of the fuel cell stack to the action of an actuator.

The utility model discloses a throttle valve and water purification equipment, and belongs to the technical field of throttle valve devices. At least two stages of flow limiting holes are formed in the throttling valve, and the water passing area of the adjacent second-stage flow limiting hole in the at least two stages of flow limiting holes is larger than that of the first-stage flow limiting hole. The water passing area of the first-stage flow limiting hole closest to the liquid inlet hole is set to be minimum, the water passing area of the flow limiting holes is increased step by step subsequently, the pressure difference between the front portions and the rear portions of the flow limiting holes is reduced, the flow speed of jet water flow is reduced after liquid enters the throttling valve through the liquid inlet hole, noise of the throttling valve is effectively reduced, and the use experience feeling of a user is improved. For example, the pressure difference before and after the second-stage flow limiting hole is smaller than the pressure difference before and after the first-stage flow limiting hole.

The utility model relates to an underwater rock plug blasting charging device. The method is suitable for the technical field of underwater rock plug blasting engineering. The technical problem to be solved by the utility model is to provide the underwater rock plug blasting charging device. According to the technical scheme, the underwater rock plug blasting charging device comprises a waterproof pipe body, explosives, leg wires, fixing pieces, plugs and electronic detonators, a cavity is formed in the waterproof pipe body, an opening communicated with the cavity is formed in the single end of the waterproof pipe body, the explosives and the electronic detonators are installed in the cavity through the fixing pieces, and the explosives and the electronic detonators are arranged in the waterproof pipe body. A cavity is formed in the waterproof pipe body, a plug capable of plugging the cavity is arranged at the opening of the waterproof pipe body, one end of the leg wire is connected with the electronic detonator, and the other end of the leg wire penetrates through the plug and is at least partially positioned outside the waterproof pipe body; and when the waterproof pipe body is sealed by the plug, the interior of the cavity can be inflated to be adjusted to preset air pressure.

This application relates to the field of prefabricated building technology, providing a prefabricated house structure including a subbase, foundation, prefabricated walls, and roof. The roof includes a top floor slab and a windproof device. The windproof device includes a shielding component, which comprises multiple sliding rods and multiple shielding parts. One end of each sliding rod is slidably mounted on the top floor slab, and the other end is slidably mounted on the prefabricated wall. Each shielding part is connected to two adjacent sliding rods. The windproof device has a windproof state where multiple sliding rods move multiple shielding parts to form an angle of retraction opposite to the incoming wind for wind protection, and a sun-exposed state where multiple sliding rods fold and retract the shielding parts. The prefabricated house structure provided by this application reduces wind load through the angle of retraction in the windproof state, thus improving the technical problem in related technologies where prefabricated house structures are difficult to adapt to wind loads from different wind directions during environmental changes, leading to house damage.

The invention provides an electric control fire monitor which comprises a first swing unit and a second swing unit located at the water outlet end of the first swing unit, a connecting pipe is connected between the first swing unit and the second swing unit, and the first swing unit and the second swing unit rotate relative to the connecting pipe. The first swing unit comprises a first miter flange and a second miter flange which are reversely and rotatably connected together, the second swing unit comprises a third miter flange and a fourth miter flange which are reversely and rotatably connected together, the water outlet end of the second swing unit is connected with a water outlet connector, and the water inlet end of the first swing unit is connected with a water inlet pipe seat. The water outlet connector has the beneficial effects that each swing unit is controlled to swing through reverse rotation of the two oblique connection flanges, and the direction of the water outlet connector is controlled through swing superposition of the two swing units; pressure difference between a water inlet and a water outlet can be effectively reduced, and fire extinguishing efficiency is effectively improved.