216results about How to "Reduced tightness" patented technology

The invention provides a high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve and relates to the field of valves, the high-temperature-resistant and high-pressure-resistant chemical pipeline corrugated pipe sealing ball valve comprises a valve body, a valve seat assembly, a ball body and a valve rod, an upper valve cover is arranged above the valve body, a first inlet and a first outlet are formed in the valve body in the axial direction, and a first through hole is formed in the ball body; the first inlet, the first through hole and the first outlet form a medium flow channel, a first cooling cavity is formed in the valve body corresponding to the lower end of the ball body, a second cooling cavity is formed in the valve body corresponding to the valve seat assembly, a third cooling cavity is formed in the upper valve cover in the axial direction of the valve rod, and a communicating pipeline is arranged between the second cooling cavity and the third cooling cavity. The communicating pipeline is provided with a liquid inlet connector, the communicating pipeline, the first cooling cavity, the second cooling cavity and the third cooling cavity are communicated to form a cooling flow channel, and the cooling flow channel is not communicated with the medium flow channel. The ball valve is provided with the cooling flow channel, so that the ball valve can play a self-compensation function of the corrugated pipe valve seat and can be effectively protected from being damaged, and the sealing performance of the valve rod and the upper valve cover is good.

The invention discloses a sealing surface two-stage adjusting sealing device. The lower support is placed on the upper edge of the circular base, and the lower support and the circular base are connected and fixed through a fastening screw and are sealed through a sealing ring. The upper portion of the lower support and the top cover are fixed through fastening screws, and the lower support and the top cover are sealed through a sealing ring. A lower sealing gasket and an upper sealing gasket are fixed to the surfaces of the inner sides of the lower support and the top cover, and the lower support and the sealing gaskets are provided with evenly-distributed groove sliding grooves. A split type large sealing ring support is placed above the lower sealing gasket, protruding sliding rails are evenly distributed on the outer side of the split type large sealing ring support, and the sliding rails correspond to the grooves. The upper portion of the split type large sealing ring support and the split type large sealing ring upper cover are positioned through a positioning pin (the support corresponds to the upper cover in a one-to-one mode). And the upper cover and the top cover of the split type large sealing ring are sealed through an upper sealing gasket. The sealing effect is guaranteed, frictional wear can be reduced, and the service life is prolonged.

The invention discloses an intelligent pressure regulating and metering pry, and belongs to the technical field of pressure regulating and metering pry. Comprising a base; the skid-mounted component and the valve bodies are arranged on the base, the valve bodies are fixedly connected and communicated with the skid-mounted component, the valve bodies are in sealed sliding connection with valve rods, and the valve rods are in sealed sliding and rotating connection with sealing blocks; the sealing blocks are fixedly connected with first connecting pieces, the multiple sliding frames slide on the first connecting pieces of the adjacent sealing blocks respectively, the sealing blocks are fixedly connected with first sealing rings, and the multiple sliding frames located on the first connecting pieces of the same sealing blocks are jointly and fixedly connected with rubber rings. Solid particles located at the attaching position of the first sealing ring and the valve body are pushed to the outside in advance, then the first sealing ring and the valve body are attached to complete plugging, and the situation that the first sealing ring cannot be completely attached to the valve body due to the solid particles, and the sealing effect is reduced is avoided.

The invention discloses a sealing cover mounting structure adopting a pressure self-adaptive sealing structure, which is based on a conventional sealing cover structure, takes a rubber ring as a basic structure, optimizes and adds a co-action component, and particularly takes the internal pressure of a container as a power source for cooperatively changing the up-down moving process of a movable ring, so that the pressure self-adaptive sealing structure is formed. The rubber ring is arranged on the inner wall of the container, the lower pressing piece, the upper pressing piece and the multiple externally-expanded jacking blocks are matched to reinforce the rubber ring again, the contact force between the rubber ring and the inner wall of the container is improved, and therefore the sealing effect of the whole structure is improved, and the air bag with the corresponding effect is additionally arranged between the upper pressing piece and the lower pressing piece; on the other hand, the pressure change in the container can be matched in an active air supply mode, and the purpose is to further interfere with the movement mode of the upper pressing piece and the lower pressing piece in cooperation with the pressure change in the container, so that the sealing capacity of the whole sealing structure is in a relatively stable state.

The invention discloses a full-automatic cutter replacing device and system.The full-automatic cutter replacing device comprises a sampling head, a sampling pipe, a mechanical claw, a mechanical arm, a cleaning bin, a recycling bin, a first adapter and a second adapter, separation and connection of the sampling head and the sampling pipe are achieved through the mechanical claw and the mechanical arm, and a first limiting part and a second limiting part are arranged on the first adapter and the second adapter; the first clamping jaw and the second clamping jaw are matched with the first limiting part and the second limiting part, so that automatic matching and separation between the sampling head and the sampling pipe can be stably realized for a long time, meanwhile, the stress of the mechanical arm is reduced in the matching and separation processes, and the stability of the sampling pipe is ensured; the technical scheme is adaptive to the existing sampling tube and sampling head, and in addition, the precision matching requirement when the sampling tube and the sampling head are inserted and pulled is also reduced.

The invention provides a heat exchange plate based on multi-layer vortex turbulence and anti-channeling curved sealing, which belongs to the technical field of heat exchangers, and mainly comprises a uniform turbulence flow dispersing device, a uniform turbulence flow collecting device, a positioning flow guide device, a multi-layer vortex turbulence device consisting of spoilers and spoiler strips, and an anti-channeling curved sealing device consisting of sealing grooves and sealing strips. The heat exchanger is characterized in that multi-layer vortex and turbulence efficient heat exchange are achieved, movement is prevented, and multi-cutting-edge labyrinth sealing is achieved. Uniform turbulent flow diffusion of fluid is achieved through the uniform turbulent flow diffusion device, multi-layer vortex and turbulent flow movement of the fluid is achieved through the multi-layer vortex turbulence device, uniform turbulent flow gathering and collecting of the fluid are achieved through the uniform turbulent flow collecting device, and positioning of the heat exchange plates and flow guiding of the fluid are achieved through the positioning and flow guiding device. And the relative movement of the heat exchange plates is prevented and multi-cutting-edge labyrinth sealing is realized through the anti-channeling sealing device.

The invention relates to the technical field of heat exchange, in particular to a heat exchanger based on bamboo joint type enhanced heat exchange and a heat exchange method.The heat exchanger comprises a heat exchanger body, and a water inlet pipe and a water outlet pipe are arranged on the heat exchanger body; the filtering structure is in sealed sliding connection with the water inlet pipe, and two groups of filtering positions are arranged on the filtering structure; the energy storage assembly is connected with the filtering structure, the energy storage assembly is matched with a top plate arranged on the heat exchanger body, and one set of filtering positions can be coaxial with the water inlet pipe; and the power assembly is arranged on the top plate, and the power assembly is matched with a third convex shaft arranged on the energy storage assembly and can drive the energy storage assembly to act, so that switching of the two filtering positions is achieved, and the circulation speed and the heat exchange efficiency of heat exchange fluid are improved.

The utility model provides a torque adjusting structure of a hydraulic retarder, and belongs to the technical field of hydraulic retarders. The oil cooler comprises a middle cover, a rear cover and an oil cooler body, the rear cover is connected with the middle cover and the oil cooler body through fastening screws, oil through holes are correspondingly formed in the rear cover and the oil cooler body, throttling ring installation grooves are formed in the side wall, close to the oil through holes, of the rear cover, and throttling rings are arranged in the throttling ring installation grooves. The throttling ring mounting groove is located at the end of the oil through hole and communicates with the oil through hole, and a throttling ring is arranged in the throttling ring mounting groove; by means of the design that a traditional throttling piece is changed into the throttling ring, use of a locking screw is avoided, the throttling ring can be directly arranged in a specially-designed installation groove in a buckled mode, the assembling and maintaining process of the device is simplified, and the throttling ring can be replaced more rapidly and conveniently; and when the throttling ring needs to be replaced, only the oil cooler needs to be disassembled, the process of disassembling and assembling the throttling piece is omitted, and the damage probability of the device is reduced while more convenience is achieved.

The invention discloses a scraper type C-shaped ball valve, relates to the technical field of ball valves, and aims to ensure the sealing effect, a backing ring is arranged in a gap between a valve seat and a valve core, so that the sealing performance is improved, the smoothness during closing is reduced, and meanwhile, the valve core is easy to wear. According to the scraper type C-shaped ball valve, the backing ring and the arc-shaped edge are matched with the sealing ring, in the process of closing the ball valve, the arc-shaped edge of the backing ring firstly makes contact with the valve element, the valve element is guided, meanwhile, friction between the valve element and the valve element is reduced, it is guaranteed that the ball valve is closed smoothly when the valve element rotates, and clamping degree and valve element abrasion increase during closing are avoided; under the action of the elastic force of the spring, the sliding ring drives the sealing ring to be tightly attached to the edge gap position of the sealing face of the valve element, and it is guaranteed that after the sealing face of the valve element is abraded, the good sealing performance is still achieved.

The invention provides an automobile evaporator split type collecting pipe riveting assembly tool and method, and belongs to the field of automobile machining.The assembly tool comprises a fixing table, a supporting frame, an air pressure driving assembly, an upper pressing die and a lower pressing die, the air pressure driving assembly controls the upper pressing die to move through a telescopic rod, and the lower pressing die is connected with the supporting frame; the collecting pipe is clamped by the upper pressing die and the lower pressing die, buckling teeth on the collecting pipe are bent and pressed through a movable die of the upper pressing die, and riveting of the split type collecting pipe of the automobile evaporator is completed at a time; the assembling method comprises the steps of placing the cover plate and the main plate, positioning the split type collecting pipe of the automobile evaporator, bending the buckling teeth, pressing the buckling teeth and resetting, the multiple buckling teeth are bent and pressed at the same time through the multiple bending teeth on the movable die, and riveting of a section of collecting pipe can be completed through one-time machining circulation of the assembling tool. The production efficiency is obviously improved, and the production period is shortened; in addition, a precise positioning technology and a pressure control algorithm are adopted, and riveting reliability and sealing performance are ensured.

The invention relates to the technical field of valve devices, and particularly discloses a discharge valve which comprises a valve body, a valve rod, a valve seat, a valve clack, a protective baffle, a cleaning assembly and a driving assembly, the valve rod is arranged in the valve body in a lifting mode, the driving assembly is arranged on the valve body, the valve clack is fixedly arranged at the bottom end of the valve rod, and the valve seat is arranged in the valve body. A protection box is arranged on the peripheral face of the valve body, the protection baffle is arranged in the protection box in a sliding mode, the cleaning assembly is arranged at the top of the protection baffle, and the cleaning assembly can clean dry and hard materials on the sealing face of the valve clack. According to the discharging valve, solid particles in high-speed flowing materials are prevented from colliding with the contact face on the valve clack, so that the service life of the valve clack is prolonged, meanwhile, the sealing effect of the valve clack and the valve seat can be guaranteed, and the situation that the sealing effect is affected by dry and hard materials is avoided.

The utility model discloses a heat dissipation and lubrication structure which comprises a liquid inlet pipe penetrating from the exterior of a mechanical seal shell to the interior of the mechanical seal shell, the end, located in the mechanical seal shell, of the liquid inlet pipe is connected with one end of a heat dissipation pipe, and the end, located outside the mechanical seal shell, of the liquid inlet pipe is connected with a liquid outlet of a water pump; the heat dissipation pipe is coiled in the mechanical sealing shell, and cooling liquid is contained in the heat dissipation pipe; a liquid inlet of the water pump is connected with a liquid outlet of the heat exchanger; and the liquid outlet pipe penetrates from the interior of the mechanical sealing shell to the exterior of the mechanical sealing shell, the end, located in the mechanical sealing shell, of the liquid outlet pipe is connected with the other end of the heat dissipation pipe, and the end, located outside the mechanical sealing shell, of the liquid outlet pipe is connected with a liquid inlet of the heat exchanger. According to the utility model, the condition of sealing failure caused by melting of the movable ring sealing ring due to temperature rise can be avoided, the friction between the movable ring and the static ring can be effectively reduced, and the normal operation of the pump is ensured.

The utility model discloses a drip-proof check valve which comprises a valve body, a valve cover and a bolt, the top of the valve body is connected with the valve cover through the bolt, a sealing gasket is arranged at the bottom of the valve cover, a spring is connected to the center of the interior of the valve cover, one side of the spring is connected with a guide rod, the center of the guide rod is connected with a spherical valve clack, and the spherical valve clack is connected with the valve cover. A guide sleeve is connected to the side, away from the spring, of the guide rod, a valve seat is arranged in the center of the interior of the valve body, a first filter screen and a second filter screen are arranged on the two sides of the valve body, a lifting type check valve is adopted for the anti-leakage check valve, the valve body and the valve seat form a sealing face through the spherical valve clack, and therefore water flow impact is reduced, and the anti-leakage check valve is convenient to use. The sealing performance is improved, vibration and noise generated during opening and closing can be reduced, the two layers of filter screens are arranged at the positions of the pipelines on the two sides of the valve body, filter screen holes of the filter screens are different, water impurities can be effectively filtered, parts in the valve body are prevented from being damaged by the impurities, and the service life is prolonged.

The invention discloses an air tightness adjustable heat preservation structure and method for connection of a prefabricated composite wall and a broken bridge door and window, and relates to the technical field of civil engineering, the air tightness adjustable heat preservation structure comprises a composite wall body, and is characterized in that an assembly groove is formed in the composite wall body, a fixed base is arranged in the assembly groove, and a door and window body is installed on the fixed base; a mounting groove is formed in the side, facing the door and window body, of the fixed base, a heat preservation assembly is arranged in the mounting groove, and the heat preservation assembly is attached to the bottom of the door and window body in a sealed mode. A built-in adjusting assembly is further arranged in the mounting groove, and the built-in adjusting assembly is connected with the heat preservation assembly and used for adjusting the sealing tightness of the heat preservation assembly. The sealing structure has the beneficial effects that the design of the inflatable closed rubber pipe is adopted, so that the inflatable closed rubber pipe expands and compresses a gap between the composite wall body and the door and window main body, the air tightness is adjustable, and the sealing performance reduction caused by material deformation or aging can be automatically compensated.

The utility model relates to the technical field of steam-water separation, and discloses a steam-water separation structure of a pure steam generator, which comprises a main body of the steam generator, an isolation plate and a stirring rod, the surface of the isolation plate is provided with through holes, and the isolation plate is installed in the main body in an up-down sliding mode. The stirring rod is provided with a driving assembly for driving the stirring rod to rotate, the driving assembly is mounted on the main body, the driving assembly comprises a transmission rod, the bottom end of the transmission rod penetrates into the main body and is fixedly connected with the middle of the stirring rod, a jacking assembly is connected between the transmission rod and the isolation plate, and the isolation plate is driven to move up and down through the jacking assembly. In the whole using process, the driving assembly and the jacking assembly are used for driving the isolation plate to slide up and down, and compared with the prior art, a sliding groove for sliding of the sliding block is eliminated, so that isolation between the gear and steam can be effectively formed, and it is guaranteed that lubricating grease on the gear can be stably lubricated.

The utility model belongs to the technical field of controllers, and discloses a controller, which comprises an upper shell, a lower shell, an electronic component and a sealing colloid, the electronic component is arranged in the lower shell, and the lower shell is filled with the sealant; the upper shell is hermetically connected with the lower shell; wherein one side, facing the lower shell, of the upper shell is provided with a plurality of annular waterproof parts, and the annular waterproof parts are inserted into the sealing colloid; an exhaust structure is arranged on the upper shell and used for communicating a space defined by the upper shell, the sealing colloid and the annular waterproof parts with the outside, so that the liquid levels of the sealing colloid on the inner sides and the outer sides of the annular waterproof parts are equal in height. According to the controller, rapid assembly can be achieved, sealing and water proofing of the controller are achieved, meanwhile, the number of part structures is reduced, assembly procedures are reduced, and cost is reduced.

The invention relates to a method for conveying a material to be conveyed into or out of an overpressure zone (1), wherein the material to be conveyed is conveyed into and / or out of an overpressure zone (1) by means of a stuffing screw (2) and compressed to form an airtight and liquidtight plug, which seals the overpressure zone (1). The invention is characterized in that the sealing of the plug is controlled by the relative positioning of the screw (6) and the plug tube (8). The invention relates to a device for carrying out the method and enabling optimal control of the sealing of the overpressure zone (1).

A battery cell according to one embodiment of the present invention comprises: an electrode assembly having a battery cell body and an electrode tab extending from the battery cell body; a battery cell case having an accommodating portion configured to accommodate the electrode assembly and a peripheral portion extending outward from the accommodating portion; an electrode lead electrically coupled to the electrode tab; and a conductive frame disposed on one surface of the peripheral portion and electrically coupled to the electrode lead through the one surface of the peripheral portion.

The utility model relates to the technical field of butterfly valves, and provides a high-sealing butterfly valve with a damping function, which comprises a valve body, damping components are arranged at the upper end and the lower end of one side in the valve body, a valve rod extending into the valve body is rotatably connected to the other side of the top end of the valve body, and a valve plate is fixedly connected into the valve body on the surface of the valve rod. The top end of the valve rod is movably connected with a valve wheel, and a mounting assembly is arranged at the lower end of one side of the valve wheel. According to the high-sealing-performance butterfly valve with the damping function, the damping assembly is arranged, a buffer plate is used for making contact with a medium firstly, then a damping spring and a damper are used for absorbing and consuming impact energy generated by movement of the buffer plate, and therefore the flowing impact force of the medium can be relieved, and excessive friction abrasion between the valve plate and the valve body caused by impact of the medium on the valve plate is avoided; and therefore, the sealing performance can be prevented from being reduced, and the service life of the valve body is prolonged.

The invention relates to the technical field of water conservancy projects, and particularly discloses a canal slope protection rapid mounting plate which comprises a slope protection plate. Avoiding grooves are symmetrically formed in the slope protection plate; a plurality of positioning holes are formed in the avoiding groove; a plurality of positioning shafts are fixedly connected in the avoiding groove; the positioning holes and the positioning shafts are designed to be equal in distance and mutually spaced, so that after the other slope protection plate is turned over, the positioning holes and the positioning shafts can be aligned and inserted, the two slope protection plates are aligned and fixed, and the multiple slope protection plates can be fixed in a positive and negative arrangement mode in the same mode; and then the space of the receding groove between every two slope protection plates forms a filling space, the filling spaces are filled with concrete and then hardened, so that the strength is increased by using the positioning shafts as reinforcing ribs, and meanwhile, the gap between the two slope protection plates is blocked, so that the water leakage in the water channel is less, and the water channel can be moved to a farther place for pouring.

The invention belongs to the technical field of oil and gas field steel wire under-pressure operation, and particularly discloses a steel wire operation anti-jamming medicament injection device which comprises a body and an anti-jamming unit, and the anti-jamming unit is located in a mounting cavity of the body; the anti-jamming unit comprises a pressing cylinder, an upper cleaning layer and a lower cleaning layer, the lower cleaning layer comprises a perforated copper pad and a dirt guide copper pad which are coaxially arranged, an inner hole and a plurality of flow guide holes are formed in the perforated copper pad, the flow guide holes are circumferentially distributed in the end face of the perforated copper pad, and the dirt guide copper pad is located above the perforated copper pad; a dirt guide hole is coaxially formed in the dirt guide copper pad; a gap is formed between the inner hole and the steel wire; through holes are coaxially formed in the upper cleaning layer and the top of the pressing cylinder and are in interference fit with the steel wire. According to the blowout prevention box, the steel wire can be cleaned, clamping stagnation of the lifted steel wire at the position of the sealing packing in the blowout prevention box is effectively prevented, and therefore abrasion and consumption of the sealing packing in the blowout prevention box are reduced, and the situation of sealing leakage or sealing loss is reduced.

This utility model relates to a connection structure between the inner liner and heating plate of a vacuum electric heating cup, including an inner liner shell, an inner liner bottom cover, and a heating plate. The heating plate is fixedly disposed at the lower end of the inner liner bottom cover. It also includes a connecting sleeve, which is fixedly disposed at the lower end of the inner liner shell. The connecting sleeve and the inner liner shell are an integral structure. The upper end of the inner liner bottom cover is fixedly connected to the transition area between the connecting sleeve and the inner liner shell. Both the inner liner bottom cover and the heating plate are located within the connecting sleeve. This design reduces welding points, thereby lowering process complexity and vacuum sealing risks, and improving overall sealing performance and structural stability.

The utility model belongs to the technical field of constant-temperature crystal oscillators, and particularly relates to a constant-temperature crystal oscillator with good air tightness, which comprises a constant-temperature crystal oscillator body. A protection box is arranged at the bottom of the outer side wall of the constant-temperature crystal oscillator body; an inclined notch is formed in the side wall of the protection box; the inner side wall of the inclined notch is in sliding contact with a first sealing plate; a plurality of first springs are fixedly connected to the outer side wall of the first sealing plate; the tops of the outer side walls of the first springs are fixedly connected with first supporting plates. A pair of first supporting plates is arranged; the outer side wall of the protection box is fixedly connected with a pair of sliding grooves. The inner side wall of the sliding groove is in sliding contact with a second sealing plate. The outer side wall of the second sealing plate is fixedly connected with a pair of connecting blocks; a pair of first notches is formed in the side wall of the first sealing plate; and through arrangement of an inclined notch, a connecting block and a first notch, when the equipment is disassembled, debugged and replaced for multiple times, the probability that the sealing performance of the equipment is reduced due to multiple times of disassembly is reduced.

The present invention discloses a ball mill filling rate measuring device, including a positioning detection structure, wherein the positioning detection structure includes a sliding sleeve, wherein a protective structure is arranged inside the sliding sleeve, and the protective structure includes a measuring slide. The ball mill filling rate measuring device, through the arrangement of an inner rotating air cavity and a connecting clamp rod, can compress the gas inside the sliding sleeve through the seal between the lower end of the measuring slide and the inside of the sliding sleeve when the sliding sleeve is retracted to the lower end of the front sliding slot, so that the air flow enters the inner rotating air cavity from the bottom ventilation groove and then sprays out from the inclined air outlet, so that the dust on the lower end of the front sliding slot is cleaned by the air flow, so as to prevent impurities from staying at the lower end of the front sliding slot, so that when the sliding sleeve is fully retracted, the impurities are mixed between the front sliding slot and the zero point positioning ruler, which easily causes damage between the zero point positioning ruler and the front sliding slot.

The invention relates to the technical field of fluid conveying pipelines, and discloses a bundled metal hose which comprises a bundled metal hose body, connector assemblies are installed at the two ends of the bundled metal hose body respectively, a plurality of small-diameter thin-wall stainless steel wire pipes are selected as basic units of the bundled metal hose body, and the outer diameter phi of each stainless steel wire pipe is smaller than 5 mm. The wall thickness is 0.1-0.2 mm, the bundling metal hose is made of one of 304 stainless steel and 316 stainless steel, a first welding spot and a second welding spot are arranged at the two ends of the bundling metal hose respectively, and the two ends of the bundling metal hose are welded to the two connector assemblies through the first welding spot and the second welding spot respectively. A plurality of small-diameter thin-wall stainless steel wire pipes are bundled to form the hose main body, so that the inherent defects of a traditional corrugated metal hose are fundamentally overcome; firstly, fluid pressure is uniformly dispersed to each independent wire tube through the bundling structure, the stress concentration phenomenon of a traditional corrugated structure is avoided, and the overall compression strength and anti-fatigue performance are remarkably improved.

The present invention relates to a vacuum wheel rim assembly, comprising a wheel rim, spokes, spoke caps, a center hub and a sealing unit, wherein one end of the spoke is mounted on the center hub, and the other end is mounted on the wheel rim through the spoke caps, the wheel rim comprises an inner side facing the tire and an outer side facing the center hub, the sealing unit comprises a lining belt, a tightening belt and a sealing belt, the lining belt is sleeved on the wheel rim and the lining belt is attached to the inner side of the wheel rim, the sealing belt is sleeved on the wheel rim and the sealing belt is attached to the lining belt, the sealing belt is fixed to the inner side of the wheel rim through the tightening belt to seal the wheel rim, and a valve core is mounted on the wheel rim. The spokes of the present invention can protect the wheel rim and prevent its deformation, and at the same time, a simple and reliable sealing unit is adopted to ensure the vacuum performance of the wheel rim.

The utility model relates to valve technical field, and disclose a kind of pressure reducing type backflow preventer, including valve body, drain valve seat, drain valve flap, long valve rod, fixed screw, valve cover, the valve body is provided with drain valve seat, the drain valve seat inside is provided with drain valve flap, the drain valve flap upper side is provided with long valve rod, the valve body upper side is provided with valve cover.The pressure reducing type backflow preventer, by first valve seat, first valve flap, first main valve rod, first spring seat, first spring and first hexagon nut are assembled to it before being loaded into valve body, subsequent and present an integral loading into valve body inside, greatly shorten assembly time, also suitable for the assembly in the valve body of smaller volume, the unique flow passage design of two-stage check valve, small flow resistance, open and close speed is fast, can effectively prevent the damage of sudden back pressure rise to valve and pipeline, limit pressure water backflow or siphon backflow, with mute function, effectively prolong the service life of valve.

The utility model relates to the technical field of liquid oxygen storage, in particular to a high-pressure sealed gas storage bottle for liquid oxygen storage, which is characterized in that a fixing block is arranged on the outer surface of a tank body, and a sealing gasket and a plurality of connecting rods are arranged on the upper surface of the tank body; a notch is formed in the side surface of the valve body; the device has the beneficial effects that the sealing gasket is clamped into the hole in the upper surface of the tank body, the mounting groove in the lower surface of the valve body is aligned with the sealing gasket and clamped into the sealing gasket, then the valve body and the tank body are fixedly connected through bolts, the buffering gasket is aligned with the positioning groove formed in the fixing block and clamped into the positioning groove, and the buffering gasket can buffer collision between the tank body and other objects; when the gas storage bottle falls off, the rubber handle is matched with the connecting rod, so that the situation that the valve body directly collides with other objects, the sealing performance of the gas storage bottle is reduced, and gas leakage of the gas storage bottle is caused can be effectively avoided; and the safety is improved.

The utility model discloses a piston for a slurry pump working cylinder and a slurry pump thereof. According to the piston for the slurry pump working cylinder, the sealing ring is pressed and fixed between the pressing piece and the piston head; the diameter of the pressing piece is smaller than that of the piston head, and the maximum diameter of the sealing ring is larger than that of the piston head. According to the slurry pump, the piston in the working cylinder of the slurry pump is the piston used for the working cylinder of the slurry pump. In the prior art, a piston used by a slurry pump is unreasonable in structural design, the service life of the piston is seriously influenced, the whole slurry pump needs to be shut down for maintenance in the using process, and the maintenance cost is increased. According to the piston used for the slurry pump working cylinder and the slurry pump thereof, the piston head is reasonable in structural design, and the sealing ring mainly works in a sealing mode in the process that the piston head pushes the slurry pump; in the return stroke process of the piston head, the sealing effect of the sealing ring is reduced, and therefore the service life of the sealing ring is prolonged.