48results about How to "Play a role in decompression" patented technology

The invention discloses a gating system of a large-section iron casting for an medium pressure external cylinder in a steam turbine; the gating system comprises a weighing ladle, a sprue, a runner and an ingate, the runner consists of an upper runner and a lower runner, a refractory ceramic filter is arranged between the upper runner and the lower runner, the minimum sectional area ratio of the sprue, the runner, a transition sprue, a transition runner and the ingate is 1.2:1.34:1:1.07:1.24; the sprue, the upper runner and the lower runner are arranged at the middle part of the casting, and the ingate of an ingate is arranged at the inner wall of an axle hole of the casting; and the gating system of the structure mainly plays a role in buffering, decompressing and steady entry of melted iron, the molding sand in the scour cast is avoided, the casting is heated evenly, with the advantages of being not easy to be mingled with impurities, carry sand, produce air gaps and cracks.

The invention discloses a portable proton-exchange membrane fuel cell power system, which relates to the technical field of a fuel cell. The system mainly comprises a fuel cell stack, a metal hydrogen storage cylinder, an air inlet valve, an exhaust valve, an axial flow fan, an air filter, a direct current (DC) / DC module, a storage battery and a power management module. Air needed by reaction is provided for the fuel cell stack by the only one fan, the fuel cell stack is also cooled by the fan, and the metal hydrogen storage cylinder is heated by the fan; the system adopts the fuel cell stack cooled by air, so that a humidification device is not needed; the system is simple and compact in whole structure, has energy-saving and environment-friendly effects, is low in running cost and convenient to carry and has a wide application scope.

A drainage laryngeal mask comprises a mask bag, a main tube and a gas filling tube. An aerating cavity and a draining cavity are arranged in the main tube, the aerating cavity is communicated with an aerating hole on the mask bag, the tail end of the draining cavity extends out of the main tube to be arranged at the tail of a small end of the mask bag, a bending angle of the main tube ranges from 70 degrees to 100 degrees, and the section of the tail of the small end of the mask bag is elliptical. The drainage laryngeal mask brings convenience for medical staff to operate, reduces suffering of a patient and is good in sealing property, and gas is prevented from entering the esophagus of the patient to aggravate reflux of the stomach of the patient when gas flows through a catheter of the trachea of the patient.

The invention discloses a cold-hot water tap which comprises a cold-hot water tap shell, a cold water feeding channel, a hot water feeding channel, a water discharge channel and a switch capable of regulating the flow rates of cold water and hot water. The cold-hot water tap is characterized in that the cold water feeding channel and the hot water feeding channel are respectively integrally provided with an impeller cavity, an impeller is arranged in each impeller cavity, an impeller shaft and a shaft sleeve are arranged between the impellers arranged in the impeller cavities of the cold water feeding channel and the hot water feeding channel, and the impellers are respectively fixedly coupled at two ends of the impeller shafts. The cold-hot water tap has the advantages that the cold-hot water tap is not influenced by the pressure difference of the cold water and the hot water, a user regulates the water temperature in bath and the cold-hot water tap with regulated water temperature is not influenced when other persons opens other water taps on the same pipeline.

The invention discloses a self-adaptive pressure-reducing drainage pipe pile and a preparation process thereof. The self-adaptive pressure-reducing drainage pipe pile comprises a pipe pile body and a pile cap, wherein at least one row of plug holes are formed in the pipe pile body and distributed along the axial direction of the pipe pile body; and water-soluble embolisms are arranged in the plugholes. The preparation process of the self-adaptive pressure-reducing drainage pipe pile comprises the following steps of: 1, reserving at the periphery of a template of a factory standardized production pipe pile along the axial direction of the pipe pile body to serve as run-through hollow holes of the plug holes; 2, manufacturing a plurality of circular tube-shaped dies in which steel wire meshes are welded, placing a processed steel reinforcement cage into a prepared template, placing the circular tube-shaped dies into the reserved run-through hollow holes of the template to prop against the inner template and welding and fixing the inner template with the peripheral reinforcing steel bars, pouring concrete, performing prestressed tension and centrifugal molding after sealing the dies, performing steam maintenance, removing the template of the factory standardized production pipe pile, and welding the pile cap; and 3, filling the circular tube-shaped dies on the side wall of the pipe pile by using a water-soluble material polyvinyl alcohol solid.

The invention discloses an intramedullary nail device, which comprises an intramedullary nail device and a lag screw, wherein the far end and near end of the intramedullary nail are not in the same straight line, the intramedullary nail has a long through hole in axial direction, and the near end of the intramedullary nail has an oblique pull hole; when used, the lag screw cooperates with the pull force of an intramedullary nail rod, the lag screw comprises a threaded lag screw and a pressurizing and anti-rotation screw, which are matched with each other; the front end of the threaded lag screw is provided with external threads; an arc-shaped groove is formed on the side face of the threaded lag screw; the rear end of the arc-shaped groove is provided with a plurality of racks which are vertical to the arc-shaped groove and are uniformly spaced; a positioning groove is formed on the tail end of the threaded lag screw; the radian measure of the surface of the pressurizing and anti-rotation screw is the same as that of the arc-shaped groove of the threaded lag screw; the pressurizing and anti-rotation screw consists of a screw positioned on at a front end and a cylinder positioned at the rear end; the diameter of the cylinder is a little bit greater than that of the screw; and the threads on the screw are connected with the jack threads of the threaded lag screw. The intramedullary nail device has a simple structure and can effectively prevent the lag screw from rotating, and after being fixed, the lag screw is stable and reliable.

The invention discloses an intelligent elastic casing pipe protecting sleeve and a design method thereof. The intelligent elastic casing pipe protecting sleeve comprises two layers of airtight wrapping layers arranged around the outer side of a casing pipe, wherein an intelligent elastic layer is arranged between the wrapping layers; the interior of the intelligent elastic layer is supported and divided through a main body framework; a mixed solution is wrapped in the main body framework and is the mixed solution of a nano-porous material and a liquid; the liquid is a non-wetting liquid (such as water or glycerinum); and the nano-porous material is a hydrophobic porous material. The intelligent elastic casing pipe protecting sleeve sleeves the outer wall of the casing pipe, when an environment pressure is changed, the intelligent elastic casing pipe protecting sleeve intelligently adjusts own volume and shape and plays a role in balancing the pressure of the outer wall of the casing pipe and sealing a small slot between the casing pipe and a cement stone ring, and the intelligent elastic layer plays a main role in distributing pressure in a pressure changing process; and when the pressure and the temperature are changed, the intelligent elastic layer automatically adjusts shape, re-distributes the pressure, and shows very excellent temperature change resistance and pressure change resistance. The intelligent elastic casing pipe protecting sleeve has the characteristics of simple structure, convenience and practicability.

The invention discloses a positioning frame device used for a gynecological surgery, which comprises fixing plates, a supporting device and a horizontal plate. The two ends of the bottom of the horizontal plate are respectively provided with fixing plates, the top of the horizontal plate is provided with a hydraulic cylinder, a sliding slot is formed in a middle portion of the horizontal plate, asliding block is disposed at the bottom of the hydraulic cylinder, a supporting plate is pulled to move up and down, so that a lifting rod moves in an inserted slot, when the lifting rod is moved to adesignated position, a rotating wheel is rotated, so that a fastening rod rotates, since one end of the fastening rod passes through the inside of a second nut seat and is screwed with the second nutseat, the fastening rod pushes a baffle plate to move in the direction of the lifting rod, the position of the lifting rod is fixed by pressing an anti-slip mat, the height of a leg support block canbe adjusted for patients of different heights, replacement of different positioning frame devices for the patients with different heights is not required, and the use cost is reduced.

The invention discloses a water hammer eliminating and pressure reducing device for valve protection. The water hammer eliminating and pressure reducing device comprises a first connecting pipe, a device body and a second connecting pipe which are sequentially arranged from left to right. The water hammer eliminating and pressure reducing device has the advantages that in the water hammer eliminating and pressure reducing device, on one hand, in a first straight plane, a first inclined plane, a second straight plane, a second inclined plane and a third straight plane with the widths constantlyincreased, according to the Bernoulli principle, the water pressure is gradually reduced when the width is gradually increased; on the other hand, water flow constantly extrudes a plurality of pistonplates, a second spring is compressed, air in a first compression cavity and a second compression cavity passes through a first communication pipe and a second communication pipe to be pressed into first flow stopping bags and second flow stopping bags, the first flow stopping bags and the second flow stopping bags in a plurality of acting pieces can form flow stopping planes for closing a waterpassing port, and valve impacts are avoided; and due to compressibility of air, a third compression cavity can further achieve the pressure reduction function, the water hammer is thoroughly eliminated, the structure is simple, and the manufacturing cost is low.

The invention provides a plug hole type pressure-reducing and draining tube pile. The tube pile comprises a tube pile body and a pile cap, wherein at least a row of plug holes axially distributed along the tube pile body are formed on the tube pile body; plugs are arranged in the plug holes; and traction ropes are connected at the ends, which are positioned on the inner wall of the tube pile body, of the plugs and extend to the top of the tube pile body in a tube of the tube pile body. A preparation process comprises the following steps of: reserving through hollow holes as the plug holes around a formwork, welding steel rods around the through hollow holes, and then manufacturing the plugs; and placing a reinforcement cage in the formwork, inserting the plugs into the reserved hollow holes on the formwork to push against an inner formwork and be exposed out of the formwork, pulling out the traction ropes from the inner formwork of the tube pile along the pile body, then binding the plugs on the formwork with steel wires and placing concrete, carrying out prestress tensioning and centrifugal shaping after film combination, then carrying out autoclave curing, shearing off the steelwires binding the formwork after the strength is achieved, releasing the mould by using a release agent, flattening the plugs exposed out of the pile body along the pile body, and welding the pile cap.

The invention discloses a cold and hot water tap which comprises a cold and hot water tap body; a cold water channel, a hot water channel, a water outlet channel and valves for adjusting the fluxes of the cold water and the hot water are arranged on the cold and hot water tap body; and the cold water channel and the hot water channel are respectively provided with sub channels between the valves and the water outlet channel; and second valves are respectively arranged on the sub channels. When the valve of only one water inlet channel is opened, a secondary valve at the same side can be opened so as to avoid the resistance to the water flow from bevel wheels. When the valves of the cold water inlet channel and the hot water inlet channel are both opened, the second valves on the sub channels can be closed, so that when hemp threads or raw material tapes or other fibers enter the cold and hot water channels, the hemp threads or raw material tapes or other fibers cannot entangle the bevel wheels, so flexible rotation of the bevel wheels is guaranteed. When cold water and hot water respectively flow from the channels in which the bevel wheels are arranged, the bevel wheel in the channel with bigger water pressure rotates initiatively and the bevel wheel in the channel with smaller water pressure is driven to rotate, so the pressure difference between the cold water and the hot water can be effectively adjusted.

The invention relates to a smart decompression pen implementation method. A smart pen is involved in the method, and an MCU (micro control unit) processing unit, a refill movement execution module, a voice module and a display module are arranged on the smart pen. The method is characterized in that a heart rate sensor, an A / D (analog to digital) conversion module, and a wireless communication module are arranged on a hand touching portion of the smart pen, the heart rate sensor is in circuit connection with the input end of the MCU processing unit via the A / D conversion module, and the output end of the MCU processing unit is in circuit connection with the refill movement execution module, the voice module, the display module and the wireless communication module. The method is simple and efficient in implementation process, decompressing effect on a user can be achieved effectively, and the user is guided to be under a good psychological state.

The invention discloses a sealing structure for a rotating part. The sealing structure comprises a rotating shaft, a flange plate, and a fixing part connected with the rotating shaft, wherein a pressure reduction ring for reducing the pressure of a high pressure oil seal when the rotating shaft rotates at a high speed is arranged between the rotating shaft and the fixing part; oil seal seat rings are arranged between the high pressure oil seal, the rotating shaft and the flange plate; the part in which the high pressure oil seal and the oil seal seat rings are connected is dynamically sealed; the side surface of the high pressure oil seal is sealed to the flange plate through a maze sealing structure. According to the sealing structure, the pressure reduction design, the oil seal for sealing, the static sealing and the maze sealing modes are combined to seal the rotating part under a high pressure condition; the sealing effect of the rotating part under the high pressure condition is superior to that of the traditional independent oil seal; in addition, the repair is convenient; the high pressure oil seal can be conveniently replaced by dismounting the oil seal seat rings during replacing the oil seal; therefore, the process of dismounting the rotating shaft during replacing the oil seal can be avoided.

The invention disclose a cold-hot water faucet which comprises a cold-hot water faucet body, wherein a cold water channel, a hot water channel, a water outlet channel and valves for adjusting the cold water flow and the hot water flow are arranged on the cold-hot water faucet body. The cold-hot water faucet is characterized in that the cold water channel and the hot water channel are respectively provided with one valve, the cold water channel, the hot water channel and the water outlet channel are converged, and the converged parts of the cold and hot water channels and the water outlet channel are respectively provided with an impeller and an impeller shaft. The cold-hot water faucet has the advantages that the pressure difference of the cold water and hot water is effectively adjusted; when other people opens the other water faucet in the same pipeline, only the total flow is reduced, the modulated cold-hot water proportion is basically not changed, and the water temperature is effectively controlled.

The invention provides a quartz sand tail powder collecting device and a using method thereof. The quartz sand tail powder collecting device comprises a box body, wherein a rotating motor is fixedly connected to one side of the top of the box body, and a first belt wheel is fixedly connected to the surface of the rotating motor; fixing seats are fixedly connected to the two sides of the top of theinner wall of the box body, and a fixing device is fixedly connected to the bottom of each fixing seat; and a filtering barrel is rotationally connected in each fixing device, a rotating shaft is fixedly connected to one side of each filtering barrel, and the end, away from the filtering barrel, of each rotating shaft penetrates through the box body and extends to the outside of the box body. According to the quartz sand tail powder collecting device and the using method thereof, the quartz powder can be filtered at a time before being collected, and larger particles are prevented; and the filtering barrels of the device can rotate, so that filtering holes in the filtering barrels are prevented from being blocked; and meanwhile, the quartz powder attached to the inner wall can be clearedthrough brushes, and waste is avoided.

The invention discloses a mechanical arm assembly used for automated production. The mechanical arm assembly comprises a bottom plate. A box body is fixedly installed on the upper surface of the bottom plate. A horizontal movement frame is fixedly installed on the lower surface of the bottom plate. A fixed plate is arranged on the upper surface of the box body. The upper surface of the fixed plateis connected with a drive plate. The upper portion of the drive plate is connected with a short arm. A supporting arm is connected to the inner side of the short arm. A connection arm is arranged onone side of the supporting arm. The invention discloses the mechanical arm assembly used for automated production. By means of the mechanical arm assembly, after the mechanical arm assembly is installed and fixed, the transverse position of the mechanical arm assembly can be adjusted, and the mechanical arm assembly can conveniently adapt to different work areas; when an arm end joint clamps an object, the pressure borne by the arm end joint can be effectively reduced, and a good protection effect is achieved; and the supporting arm and an arm rod can also be reinforced, and therefore the firmness degree between the supporting arm and the arm rod can be better, and the situation that the supporting arm and the arm rod loose is effectively avoided.

The invention discloses a pressing device for pump chamber copper bush press-fitting. The pressing device for the pump chamber copper bush press-fitting comprises a bottom seat, a workbench, supporting columns, a punching table, a lifting plate, a connecting plate, a lifting block, a base, a punching plate, a stamper, a bottom die, air pressure boxes, first positioning telescopic rods, rotating grooves, rotating balls, piston grooves, baffles, telescopic holes, rubber pistons, sliding rails, sliding grooves, pressurizing pipes, a mounting hole, a hydraulic cylinder and a second positioning telescopic rod. The four supporting columns are uniformly fixed to the upper surface of the bottom seat, the workbench is arranged above the bottom seat, and the workbench is fixedly connected with the supporting columns, and the punching table is fixed to the side edge of the upper surface of the workbench. According to the pressing device for the pump chamber copper bush press-fitting, the first positioning telescopic rods and the second positioning telescopic rod are used for compressing the gas in the air pressure boxes to overcome the deflect that the bottom die is destroyed and the servicelife of the bottom die is shortened due to excessive pressure impact on the bottom die. The placement and positioning of a copper bush can be conveniently achieved through the first positioning telescopic rods, the position of the copper bush can be conveniently adjusted through balls at the tops of the first positioning telescopic rods, and the production efficiency is improved.

The invention discloses a motor with noise reduction and damping functions, and the motor comprises a motor pedestal. The lower part of the motor pedestal is fixedly connected with a noise reduction plate, and the inner wall of the motor pedestal is provided with a buffering hole. The upper part of the motor pedestal is provided with installation clamping grooves, and the upper parts of the installation clamping grooves are fixedly connected with a buffering support seat. The inner wall of the buffering support seat is provided with a buffering damping spring, and the upper end of the buffering support seat is fixedly connected with a damping device. The inner wall of the damping device is fixedly connected with a noise reduction device, and one end of the noise reduction device is fixedlyconnected with a rotating shaft. The setting of the motor pedestal, the noise reduction plate, the buffering hole, the installation clamping grooves, the buffering spring, the noise reduction deviceand a cooling device facilitates the flexible application, so the noise in an application process can be reduced, the noise caused by the collision and friction between the rotating shaft and the housing is avoided. Moreover, the heat dissipation effect is improved, and the demands of a user are met.

The in-bottle pressure reduction and self-locking integrated electromagnetic valve comprises a bottle body, a valve cover and an electromagnetic valve assembly, the valve cover is arranged at a bottle opening of the bottle body, and the valve cover is provided with an inflation inlet and an air inlet channel; the electromagnetic valve assembly comprises a magnetic conductive sleeve, a static iron core, a movable iron core, a framework and a strong magnet, the magnetic conductive sleeve is connected to the lower portion of the valve deck, the framework is arranged in the magnetic conductive sleeve, the static iron core is fixedly arranged in the framework, a coil is wound on the periphery of the framework, a magnetic isolation sleeve is arranged on the lower portion of the magnetic conductive sleeve, the movable iron core is arranged in the magnetic isolation sleeve, and the movable iron core makes contact with the static iron core when attracted upwards. An elastic piece I is arranged between the static iron core and the movable iron core, the strong magnet is installed on the framework, the movable iron core is provided with a first exhaust passage, the lower portion of the magnetism isolating sleeve is provided with a valve nozzle, the static iron core is provided with a second exhaust passage, the position, corresponding to the second exhaust passage, of the movable iron core is provided with a sealing structure, and the valve deck is provided with an exhaust port and a third exhaust passage communicated with the exhaust port and the second exhaust passage. Through the arrangement, free switching between normally-closed state and normally-open state of the electromagnetic valve can be realized.

The invention discloses a cold and hot water faucet. The cold and hot water faucet comprises a cold and hot water faucet body, a cold water channel, a hot water channel, a water outlet channel, a cold water flow adjusting valve and a hot water flow adjusting valve. Valves are respectively arranged on the cold and the hot water channel. Screws and a screw shaft are respectively arranged on sections, intersected with the water outlet channel, of the cold water channel and the hot water channel. The screws are respectively coupled and fixed on the same screw shaft or the screws are integrated with the screw shaft. A guide wheel is arranged between the two screws and on a section, intersected with the water outlet channel, of the cold water channel and the hot water channel. When the valves are all switched on, flows of cold water and hot water are basically identical, pressure difference between the cold water and the hot water is effectively adjusted. When a user turns on other faucets on a same pipeline, only total flow is reduced, adjusted proportion between the cold water and the hot water is basically not changed, thus the temperature of water is effectively controlled.

The invention discloses a stable and reliable digital film shooting rack which comprises a shooting rack main body. The shooting rack main body is composed of a stretching and contracting rod, a supporting pipe and a display screen, wherein the stretching and contracting rod is arranged on one side of the shooting rack main body, the supporting pipe is arranged on one side of the stretching and contracting rod, the display screen is arranged on one side of the supporting pipe, and the display screen is fixedly connected with the stretching and contracting rod through the supporting pipe. According to the stable and reliable digital film shooting rack, the provided stretching and contracting rod can be elongated and shortened to achieve the far and near distance shooting effect, glue-gluedfriction pads arranged on a control rod can prevent slipping in use, a provided operation rod can operate and control a force bearing rack to rotate to conveniently control the direction and positionof a camera, the camera can perform shooting and photographing through the displaying of the display screen, one side of each stretching and contracting support rod is provided with a fixator which iscapable of being conveniently fixed with the ground to prevent moving and sliding, and one side of each fixator is provided with a spring which is capable of performing pressure-reducing and pressure-resisting effects in use.

The invention relates to a pressure-slowing wave-proof folding hinged door which is mounted at an opening between ship rail wallboards on a ship deck. The door comprises a first door plank and a second door plank. The surfaces of the first door plank and the second door plank are each provided with water holes, the bottom sides of the first door plank and the second door plank are each equipped with universal wheels, and a first side of the first door plank and a second side of the second door plank are respectively equipped with hinge seats which can be hinged to the ship rail wallboards at the two sides of the opening. Of a second side of the first door plank and a first side of the second door plank, at least one side is equipped with a movable pin shaft, and at least one side is equipped with a limiting plate fitting the movable pin shaft. The fitting state of the movable pin shaft and the limiting plate corresponds to the on-off state between the first door plank and the second door plank. The pressure-slowing wave-proof folding hinged door has a simple structure, is of high practicability, has a pressure slowing function, and does not affect normal operation.

The utility model relates to the technical field of medical instruments, in particular to a cardia anti-tearing decompression device. The cardia anti-tearing decompression device comprises a storage tube and a decompression tube, wherein the storage tube and the decompression tube are straight tubes which are through up and down, the inner diameter of the storage tube is larger than the outer diameter of the decompression tube, so that the decompression tube can be stored in a tube cavity of the storage tube, a first taper tube is fixed to the upper end of the decompression tube, and a secondtaper tube is fixed to the lower end of the decompression tube; and the first taper tube and the second taper tube are elastic soft taper tubes which are through up and down, a narrow end tube openingof the first taper tube is in butt joint with an upper end tube opening of the decompression tube, a narrow end tube opening of the second taper tube is in butt joint with a lower end tube opening ofthe decompression tube, and the first taper tube and the second taper tube can be retracted into a tube cavity of the storage tube after radial contraction. The device provided by the invention is matched with an esophageal endoscope for use.

The invention discloses a coupler which comprises a first half coupler, a second half coupler, an elastic gasket, inclined holes, protruding heads, grooves, pin holes, screw holes, pin columns and nuts. The coupler is characterized in that the pin holes and the screw holes are evenly distributed in the cross section of the first half coupler; the protruding heads are arranged at the lower portion of the first half coupler; the pin holes and the screw holes are evenly distributed in the cross section of the second half coupler; and the grooves are arranged in the upper portion of the second half coupler. The coupler is simple in structure and easy to assemble and disassemble; the pin columns 9 are placed inside the pin holes 7, and the nuts 10 are arranged inside the screw holes 8, so that the first half coupler 1 and the second half coupler 2 are connected tightly; and the inclined holes 4 are arranged in the first half coupler 1 and the second half coupler 2, so that mechanical abrasion is effectively avoided, and friction force is reduced.

The invention relates to the technical field of mineral wool fiber devices, in particular to a double-layer mineral wool fiber plate composite device, which includes a main frame body, a conveying roller is installed on the inside of the main frame body for rotation, and a device is welded and mounted on the top of the main frame body. The top bolt of the installation frame is equipped with a telescopic cylinder, and the bottom end of the telescopic cylinder penetrates the installation frame and is welded with a mounting plate. Guide rod, the top end of the guide rod is sleeved with a decompression spring, the bottom end of the guide rod penetrates the installation plate and is welded with a lower pressure plate, the two sides of the installation frame are welded and installed with support seats, and the top of the support seat is welded A first telescopic rod is installed. The present invention has a comprehensive press-fit contact area, improves the composite effect, effectively limits and fixes, avoids the phenomenon of deviation caused by pressure, ensures the pass rate of processing, guarantees the effect of later use, and further meets the use requirements.

The invention relates to an improved supporting drainage device used after anastomosis, which comprises a guide tube and an outer sleeve; the guide tube is located in the outer sleeve and can move relative to the outer sleeve; a supporting body and a bracket body are arranged at the first end of the guide tube and extend out of the first end of the outer sleeve; the bracket body is a supporting bracket; openings are formed in the upper end and the lower end of the supporting bracket, so that digestive juice can freely circulate in the supporting bracket; the supporting body comprises a lifting structure arranged at the lower end of the supporting bracket; the lower end of the lifting structure extends into the guide tube and communicates with a tube cavity of the guide tube; by arranging the lifting structure, the lifting and supporting effects are achieved; and it is guaranteed that the supporting bracket does not fall off when being placed. By innovatively supporting the stretching direction and position of the drainage device, the problem of discomfort caused by the fact that a traditional postoperative patient needs to insert a stomach tube from the nasal cavity is solved, and the incidence rate of inhalation pneumonia is effectively reduced.

The invention discloses a water hammer eliminating decompression device for protecting a valve, which comprises a first connecting pipe, a device body and a second connecting pipe arranged in sequence from left to right. The advantage is that in the present invention, on the one hand, under the first straight plane, the first inclined plane, the second straight plane, the second inclined plane, and the third straight plane whose width is continuously increasing, according to Bernoulli's principle, the width gradually increases, and the water On the other hand, the water flow continuously squeezes the multiple piston plates, and compresses the second spring, so that the air in the first compression chamber and the second compression chamber are respectively pressed in through the first communication pipe and the second communication pipe. In the first choke bag and the second choke bag, the first choke bag and the second choke bag among the multiple active parts will form a choke surface that is closed to the water outlet to avoid impact on the valve. The third compression chamber will further play the role of decompression, completely eliminate the water hammer, and the structure is simple and the production cost is low.