100 results about "Pressure Limit Valve" patented technology

The present application relates to the technical field of microneedle transdermal drug delivery, and particularly relates to a transdermal drug delivery patch and a penetration promoting patch assembly. The transdermal drug delivery patch comprises a driving device, the driving device comprises an elastic air bag, a pressure generating unit and a pressure limiting valve, the pressure generating unit is connected with the elastic air bag, is used for increasing the internal air pressure of the elastic air bag and making the elastic air bag expand, the pressure limiting valve is arranged on the elastic air bag, and is opened only when the air pressure in the elastic air bag exceeds a threshold value, is used for reducing the internal air pressure of the elastic air bag and making the elastic air bag shrink; the patch further comprises a dredging device, the dredging device comprises a substrate, one side surface of the substrate is in contact with the elastic air bag, and a dredging unit capable of treating the skin is arranged on the other side surface of the substrate; the dredging unit can repeatedly touch the skin in the process that the elastic air bag repeatedly expands and shrinks. The present application can effectively improve the absorption effect of the skin on active ingredients, and simultaneously reduce the operation and learning difficulty.

This application discloses an air suspension control system with a load connector, relating to the field of air suspension technology. By adding an external load interface and controlling the opening and closing of the air circuit through an electronically controlled pressure-limiting valve, it is possible to inflate an external load. The air suspension control system includes: an air supply valve unit, an air silencer filter dryer, an air tank, and multiple air springs. The air supply valve unit includes a manual vent bolt, an electronically controlled pressure-limiting valve, and a dryer tank. The air supply valve unit is equipped with a first air inlet, a second air inlet, a third air inlet, a fourth air inlet, and multiple fifth air inlets. The manual vent bolt is connected to the first air inlet, the electronically controlled pressure-limiting valve is connected to the second air inlet, and the dryer tank is connected to the third air inlet. The air inlet and outlet of the air silencer filter dryer are connected to the fourth air inlet. The air tank is connected to the dryer tank through the third air inlet. Each of the multiple air springs is connected to one of the multiple fifth air inlets.

The invention discloses a coal mine two-lane hydraulic support anti-impact stand column and a multi-stage pressure relief method of the coal mine two-lane hydraulic support anti-impact stand column. The anti-impact stand column comprises a first-stage cylinder, a second-stage cylinder, a movable column and an inner leakage plane pressure limiting valve. The first-stage cylinder is divided into two cavities by a valve seat plate arranged in the first-stage cylinder; a valve port is formed in the middle area of the valve seat plate; the inner leakage plane pressure limiting valve comprises a pressure limiting valve piston, a valve element and a first-stage elastic element. The pressure-limiting valve piston is connected with the inner wall of the upper cavity in a movable sealing fit manner, and a plurality of damping holes are formed in the pressure-limiting valve piston; the upper end of the valve core is connected with the pressure-limiting valve piston, and the lower end extends out of the valve port of the valve seat plate and closes / opens the valve port; the two ends of the first-stage elastic element make contact with the pressure limiting valve piston and the valve seat plate respectively. The cavity wall of the cavity C is provided with an upper cavity pressure relief opening, and the cavity B is provided with a lower cavity pressure relief opening. By assembling the internal leakage plane pressure limiting valve in the first-stage cylinder, the problems that an existing hydraulic support stand column is low in pressure relief response speed, seriously insufficient in pressure relief capacity and the like are solved.

The utility model relates to a pressure cooker cover, including the cover, button, transmission part and pressure limiting valve, the cover is provided with at least two accommodation cavities, the accommodation cavity is provided with the exhaust pipe, the pressure limiting valve is with the activity mode setting in the accommodation cavity, the pressure limiting valve is closed corresponding exhaust pipe under the action of gravity, the cover is provided with button accommodating cavity, the button is with the activity mode and places in button accommodating cavity, through setting at least two accommodation cavities and corresponding pressure limiting valve on the cover, and adopting button drive transmission part synchronous belt drive multiple pressure limiting valve to open exhaust pipe, make the steam in the pot can be discharged rapidly via multiple exhaust passages, not only significantly improved the pressure relief efficiency, shortened the cover opening waiting time, formed double pressure relief path simultaneously, still can pass through other passage safe pressure relief when one of exhaust passages is abnormal, effectively promoted the security and reliability in the use process.

The utility model discloses a riveting device for a pressure-limiting valve of a high-pressure oil rail assembly, which belongs to the technical field of assembly of automobile parts, is used for pressing a thin wall of the pressure-limiting valve, and comprises a driving mechanism and a riveting mechanism, the top of the pressure head assembly is in driving connection with the driving mechanism, and the pressure head assembly is arranged above the pressure limiting valve; the positioning mechanism is provided with a positioning hole, and the bottom of the pressure limiting valve is installed in the positioning hole; the pressing head assembly, the positioning mechanism and the pressure limiting valve are coaxial in the vertical direction, and the driving mechanism drives the pressing head assembly to move downwards to the to-be-pressed position of the pressure limiting valve to be pressed inwards. The thin wall machined by the riveting device has the advantages of high connection strength, vibration resistance, sealing consistency and the like after deformation, the debugging rejection rate of pressure-limiting valve parts is greatly reduced, the technological maturity of pressure-limiting valve products is improved, and the reliability and durability of the products are improved.

A pneumatic system for a vehicle comprising an air compressor and a pressure circuit in fluid communication with the air compressor, the pressure circuit comprising a lower pressure branch and a high pressure branch in fluid communication with each other. The pneumatic system further comprises a controllable pressure limiting valve separating the low pressure branch from the high pressure branch.

The utility model discloses a kind of pressure-limiting valve and cooking utensil, belong to cooking utensil technical field, purpose is to overcome the defect that existing pressure-limiting valve is not easy to disassemble. Pressure-limiting valve includes valve body, the valve body has opening downward mounting groove, the inside wall of the valve body has assembly groove, the movable limit piece of assembly groove can be set, the convex part of the limit piece projects from the inside wall of the valve body, elastic member is equipped between the limit piece and the valve body, to make the limit piece tend to move to the mounting groove. The pre-pressure of elastic member is stronger controllability, facilitate the clamping force control of limit piece to exhaust pipe in reasonable range, avoid too loose or too tight, give consideration to connection stability and disassembly convenience.

The invention belongs to the technical field of petroleum well cementation simulation tests, and discloses a simulation experiment device and method for dynamic corrosion of carbon dioxide to well cementation cement stone. The simulation experiment device comprises a kettle body, a liquid carbon dioxide bottle and a carbon dioxide recovery bottle, the kettle body is provided with an upper end opening, a lower end opening and a containing cavity, the upper end opening and the lower end opening are communicated with the upper end and the lower end of the containing cavity respectively, and a test combination body is placed in the containing cavity. The test assembly comprises a rock core, and set cement and a sleeve which are sequentially arranged on the outer side of the rock core in a sleeving manner; the liquid carbon dioxide bottle is connected with the upper port through a liquid inlet pipe so as to inject liquid carbon dioxide into the containing cavity, and a booster pump is arranged on the liquid inlet pipe. The carbon dioxide recovery bottle is connected with the lower port through a liquid return pipe to recover liquid carbon dioxide, and a pressure limiting valve is arranged on the liquid return pipe. According to the invention, the flowing of carbon dioxide in the stratum and the corrosion simulation of the cement stone at the well cementation interface are realized, and the actual working condition that the cement stone is corroded by carbon dioxide under the stratum condition is more truly reduced.

A method for determining at least one volume flow rate in an apparatus for a hydraulic system, including the steps of: determining a temperature of the medium in the reservoir, determining a total volume flow rate conveyed by the hydraulic pressure source in the first hydraulic line depending on the temperature, determining a first partial volume flow rate discharged into the reservoir through the pressure-limiting valve, and determining a second partial volume flow rate through the aperture and the throttle to the device as a difference between the total volume flow rate and the first partial volume flow rate.

Provided in the embodiments of the present application are a cooking method, a control apparatus, a cooking appliance and a storage medium, which belong to the technical field of household appliances. The cooking method comprises: when a pressure-limiting valve is arranged at an exhaust port, steaming food in a cooking chamber of a cooking appliance; and after the steaming of the food ends, removing the pressure-limiting valve from the exhaust port to roast the food. By using the moisture of the food itself for steaming, the moisture evaporates into steam, and the superheated steam can quickly basically cook the food through. At a food roasting stage, the pressure-limiting valve is removed from the exhaust port, the steam in the cooking chamber can be quickly discharged from the exhaust port, and the surface of the food can be quickly browned. By controlling the pressure-limiting valve and the exhaust port at the steaming stage and the roasting stage, the moisture of the food is indirectly controlled, thereby realizing automatic switching between steaming and roasting, allowing the food to be cooked so as to have a crispy exterior and a tender interior, and improving the intelligence level and use experience of the cooking appliance.

The invention provides a mining multifunctional valve group and a control method thereof, the mining multifunctional valve group is connected among a hydraulic rotary motor, a pair of execution cylinders and a pair of synchronous oil cylinders, and the mining multifunctional valve group comprises a valve body, a first pressure reducing valve, three two-position three-way electromagnetic directional valves, a pair of two-position four-way proportional valves and a synchronous flow distributing and collecting valve; the two two-position four-way proportional valves are respectively provided with a pair of pressure compensation valves, a pair of pressure limiting valves and a shuttle valve; the pressure compensation valve is used for adjusting the working oil pressure, the pressure limiting valve is used for carrying out secondary pressure setting on the pressure required by each executing mechanism and simultaneously meeting the requirement for instant high-pressure discharging, and the shuttle valve is used for enabling each two-position four-way proportional valve to output pressure outwards after a fixed pressure difference is added on the corresponding highest pressure. The mining multifunctional valve group can prevent the shaking phenomenon caused by pressure fluctuation of an oil source, improve the control precision of each executive component in a bottom cleaning device, avoid impact damage to a control valve due to action change of the executive component or encountering an external load, and avoid accidental rotation of a rotation mechanism.

The utility model relates to a kind of high-reliability pressure-limited pressure cooker exhaust structure, including pressure-limiting valve and exhaust pipe, the outer thread is only set in the gas outlet end outer periphery of exhaust pipe, the small diameter size of the outer thread is greater than the non-gas outlet end size of exhaust pipe, the pressure-limiting valve includes coaxially arranged inner valve body and outer valve body, the outer valve body is fixedly sleeved in the outer periphery of the inner valve body, the inside of the inner valve body is formed with accommodating cavity, the bottom of the inner valve body is provided with the opening being communicated with accommodating cavity, the opening is fixedly provided with insert, the center of the insert is provided with the internal thread being matched with the outer thread, valve tip is fixedly arranged in the accommodating cavity, the gas outlet end of exhaust pipe is inserted into accommodating cavity. After using such scheme, the risk that pressure-limiting valve is accidentally dropped due to snap spring fatigue or improper operation is fundamentally eliminated by using thread structure, and the safety and connection reliability are greatly improved.

The invention discloses a hydraulic control system and method for free switching of high impact and low impact of a drill jumbo and relates to the field of engineering machine.The hydraulic control system comprises a pump assembly, an oil outlet valve set, a main reversing valve and a pressure limiting valve set. When the main reversing valve is located at the first station, the pressure limiting valve set sets the standby pressure of the hydraulic control system to the overflow pressure value of the third overflow valve, the pump assembly maintains the minimum flow output, when the main reversing valve is located at the second station, the highest impact pressure is limited to the overflow pressure value of the first overflow valve, and the pump assembly is suitable for tapping and soft rock working conditions, and when the main reversing valve is located at the third station, the highest impact pressure is limited to the overflow pressure value of the second overflow valve. The impact pressure is limited to the overflow pressure value of the second overflow valve, the impact power of the drill jumbo is prevented from exceeding the limit, the drill jumbo is suitable for hard rock and deep hole working conditions, through cooperation of the control oil ports and the pressure limiting valve set, different highest system pressures are limited under different working conditions, segmented control over the high impact pressure and the low impact pressure can be achieved, and the working efficiency is improved.

The utility model discloses an ear-nose-throat atomization dosing device, including atomizer and medicine delivery pipe, and the medicine delivery pipe's medicine inlet end is communicated with the medicine outlet end of atomizer and is installed, still include: gas heater, its top side in the medicine outlet end of atomizer and with the fixed connection of atomizer's outer wall, the soft pad, its inside hollow forms and forms the flow guide groove, the middle position of soft pad one end fixedly penetrates and installs the pressure limiting valve, and the air inlet end of pressure limiting valve and the exhaust end of gas heater are communicated and installed, be equipped with exhaust mechanism in the flow guide groove. This improved ear-nose-throat atomization dosing device uses, can under the condition that almost does not influence medicine delivery pipe bending deformation, synchronous to atomization medicine for sustained heating treatment, to make the atomization medicine of medicine delivery pipe discharge always maintain in the warm state, can greatly reduce atomization medicine in with patient ear-nose-throat inside contact to patient's irritability, not easy to cause patient to feel uncomfortable.

The embodiment of the application provides a cooking method, a control device, a cooking appliance and a storage medium, and belongs to the technical field of household appliances. The cooking method comprises the following steps: in the state that a pressure limiting valve is arranged at an exhaust port, steaming food in a cooking cavity of a cooking appliance; after the steaming of the food is completed, moving the pressure limiting valve away from the exhaust port to bake the food. The food is steamed by using the moisture of the food itself, the moisture evaporates into steam, and the overheated steam can quickly cook the food. In the baking stage of the food, the pressure limiting valve is moved away from the exhaust port, the exhaust port can quickly exhaust the steam in the cooking cavity, the surface of the food can be quickly carbonized, the moisture of the food is indirectly controlled by controlling the pressure limiting valve and the exhaust hole in the steaming stage and the baking stage, automatic switching of steaming and baking is realized, the cooking effect of the food is achieved, the intelligent level and the use experience of the cooking appliance are improved.

A filter arrangement for cleaning hydraulic oil includes an inlet for supplying pressurized hydraulic oil, a filter element which is connected to the inlet for cleaning the supplied hydraulic oil, an outlet for providing the cleaned hydraulic oil via a first supply line which is connected directly to the outlet for operating a first hydraulic consumer group, and a pressure-limiting valve which is connected to the inlet and which is connected at the outlet directly to a second supply line for operating a second hydraulic consumer group, wherein the first and second supply lines communicate with each other via a throttle element.

The invention relates to a hydraulic system (1) for driving a building material and / or thickener pump (50), the hydraulic system (1) having: a supply pressure section (3) and a low pressure section (4) for a hydraulic liquid (L); a controllable low-pressure limiting valve device (5) for variably setting a low-pressure value range of a low pressure (N) of the hydraulic fluid (L) in the low-pressure section (4); a controllable supply pressure limiting valve device (6) for variably setting a supply pressure value range of a supply pressure (S) of the hydraulic fluid (L) in the supply pressure section (3); and a control device (7) which is designed to jointly control the low-pressure limiting valve device (5) and the supply-pressure limiting valve device (6) in such a way that the low-pressure limiting valve device (5) and the supply-pressure limiting valve device (6) set a low-pressure value range and a supply-pressure value range in dependence on one another.

The utility model discloses a honeycomb type low-temperature low-pressure energy-saving digester which comprises a digester body, a digester cover, a pressure thermometer used for measuring the pressure and temperature in the digester and more than two cylindrical digester containers used for containing materials, all the digester containers can be vertically arranged in the digester body together, the lower ends of the digester containers are closed, and the upper ends of the digester containers are open. The pot cover can cover the upper port of the pot body in a sealing mode, the pressure thermometer is arranged on the pot cover, and a pressure limiting valve and a safety valve are arranged on the pot cover. According to the utility model, more than two materials can be simultaneously cooked at low temperature and low pressure, the nutritional ingredients, taste and flavor of the materials can be better maintained, the energy consumed by cooking can be reduced, and the problems of over cooking and scorching of the materials can be avoided.

The embodiment of the application provides a cooking utensil control method, a control device, a cooking utensil and a storage medium, and belongs to the technical field of household appliances. The control method comprises the following steps: when the pressure in the cooking cavity of the cooking utensil is greater than or equal to the pressure limiting value of the pressure limiting valve, the temperature of a target fluid is obtained, the target fluid being a fluid discharged from the cooking cavity through the pressure limiting valve and the exhaust port; and when the temperature of the target fluid is greater than or equal to a first preset temperature, the heating power of the cooking utensil is reduced to heat the cooking cavity, and the first preset temperature is used to judge the state of the pressure limiting valve. By measuring the temperature of the target fluid discharged through the pressure limiting valve and the exhaust port, the water amount of the food in the cooking cavity is judged, and the smaller pressure limiting value of the pressure limiting valve can not only open the valve when the pressure in the cooking cavity reaches the pressure limiting value to judge the water amount of the food by temperature measurement, but also can close the pressure limiting valve when the pressure in the cooking cavity is smaller than the smaller pressure value of the pressure limiting valve, so that the water loss in the food cooking process is reduced.

The application discloses a detachable high-pressure pot cover and relates to the field of high-pressure pot accessories. The cover body is provided with a pressure limiting valve on the upper surface, and a fixing assembly is arranged between the pressure limiting valve and the cover body. The lower surface of the cover body is provided with an anti-blocking assembly. When the exhaust rod is installed, the rotating block is rotated and lowered in the fixing disc, so that the inclined surface on the outer surface of the rotating block extrudes the extrusion block, the extrusion block locks the limiting block, the exhaust rod is locked, the outer surface of the exhaust rod is abutted by the soft abutting block on the outer surface of the extrusion block, sealing is realized, and the exhaust rod is convenient to disassemble and replace. The anti-blocking cover is connected with the fixing ring through threads, so that the anti-blocking cover can be rotated and disassembled. A new anti-blocking cover is rotated and jacked up to the inside of the fixing ring. When the anti-blocking cover is jacked up, the jacking disc is driven to ascend, so that the sealing ring on the upper surface of the jacking disc seals the round hole through which the exhaust rod penetrates, the anti-blocking cover is convenient to disassemble, and the sealing effect is further improved.

This invention belongs to the field of valve testing technology and relates to a fully automatic high-pressure airtightness testing and classification system for pressure-limiting valves. It includes a frame, a high-pressure airtightness testing unit, a feeding and sorting unit, and a control system. The high-pressure airtightness testing unit employs a dual-cylinder driven clamping structure combined with an electromagnet sealing structure for its testing fixture, adaptable to high-pressure environments ≥15MPa, and features a built-in silencer to optimize the working environment. The feeding and sorting unit achieves fully automated operation and includes a QR code identification module. The control system implements a three-level performance classification based on leakage rate and synchronizes with the MES system through a data interaction module, enabling full-process data traceability. This invention achieves fully automatic, high-precision testing and refined classification of high-pressure pressure-limiting valves, significantly improving testing efficiency and accuracy, and can be widely applied to batch testing scenarios for high-pressure pressure-limiting valves.

A high-pressure fuel pump includes an inlet, which is in the form of an inlet port fixed to the pump housing, and a pressure-limiting valve that fluidically connects a high-pressure region to a low-pressure region and opens in the direction of the low-pressure region. The pressure-limiting valve opens in the direction of an inlet port chamber.

The utility model relates to a hydraulic delay eliminating system of a bucket lifting mechanism. The hydraulic control device comprises an electromagnetic valve, a large cavity pressure-limiting valve, a bucket lifting oil way, a bucket descending oil way, a small cavity pressure-limiting valve and a lifting oil cylinder, a lifting oil cylinder large cavity and a lifting oil cylinder small cavity are arranged in the lifting oil cylinder, and the hydraulic control device is structurally characterized by further comprising a throttling hole and a hydraulic control one-way valve, the two ends of the bucket lifting oil way are connected with the electromagnetic valve and the lifting oil cylinder large cavity respectively, and the two ends of the hydraulic control one-way valve are connected with the hydraulic control one-way valve respectively. The two ends of the bucket descending oil way are connected with the electromagnetic valve and a small cavity of the lifting oil cylinder respectively, the bucket descending oil way is connected with the hydraulic control one-way valve, the large cavity pressure limiting valve, the throttling hole and the hydraulic control one-way valve are all arranged on the bucket ascending oil way, the small cavity pressure limiting valve is arranged on the bucket descending oil way, and a first electromagnet and a second electromagnet are arranged on the electromagnetic valve. The bucket ascending oil way and the bucket descending oil way are formed by machining oil pipe materials, and the electromagnetic valve is an O-shaped functional electromagnetic valve.

The electromagnetic reversing pressure limiting valve comprises a main valve, an anti-explosion valve and an anti-explosion valve magnet, the anti-explosion electromagnet is installed on the anti-explosion valve and used for controlling an anti-explosion valve element of the anti-explosion valve, and the anti-explosion valve is installed on a valve body of the main valve in an integrated mode. A pressure limiting valve element is arranged in the main valve, a screw plug and a pressure adjusting mechanism are arranged on a valve body, the pressure adjusting mechanism acts on the pressure limiting valve element and is used for controlling the axial displacement of the pressure limiting valve element, and the anti-explosion valve and the main valve form new A-T and A-P oil ways. The pressure-limiting valve core is controlled by the pressure regulating mechanism to limit the oil inlet pressure, so that the pressure in a brake loop is a limit value, the requirement of the valve applied to a double-loop wet brake system is met, and by combining with the anti-explosion valve, the purpose of parking by cutting off an oil path through anti-explosion induction is achieved, the purpose of emergency braking is achieved, and accidents in emergency situations are avoided.

The utility model relates to the technical field of electric pressure cooker, propose a kind of exhaust mechanism of pressure cooker, including the pressure-limiting valve for being arranged on cover and being used to open and close exhaust passage, the movable connecting rod, push block assembly and exhaust button are equipped on the cover, exhaust button discharges the gas in pressure cooker under pressing state;Connecting rod one end is cooperatively arranged with pressure-limiting valve, push block assembly is operable to act on connecting rod under the closed state of exhaust passage, to drive connecting rod to drive pressure-limiting valve movement and open exhaust passage;Exhaust button is operable to drive push block assembly reset operation under the open state of exhaust passage, and trigger connecting rod and pressure-limiting valve reset operation to initial position in sequence, to close exhaust passage.

The utility model relates to the technical field of anti-floating pressure limiting valves, in particular to a basement anti-floating pressure limiting valve of a sealing structure, which comprises a drainage pipe and a pressure limiting mechanism, the pressure limiting mechanism comprises a first water pipe, a second water pipe, a linkage rod, a sealing plate, a mounting ring, a telescopic spring, a moving plate and an adjusting assembly, the first water pipe is fixedly connected and communicated with the drainage pipe, the second water pipe is fixedly connected and communicated with the drainage pipe, the sealing plate is in sliding connection with the first water pipe, the moving plate is in sliding connection with the second water pipe, the two ends of the linkage rod are fixedly connected with the sealing plate and the moving plate respectively, and the mounting ring is fixedly connected with the first water pipe. The two ends of the telescopic spring are fixedly connected with the mounting ring and the sealing plate correspondingly, the linkage rod is located in the telescopic spring, the adjusting assembly is arranged on the second water pipe, the pressure intensity of underground water is controlled through the pressure limiting mechanism so that a basement can be protected, and the device is simple in structure and convenient to maintain in the later period.

The invention discloses a hydraulic control oil way for a rear-drive DHT hybrid transmission with controllable motor cooling flow, and belongs to the technical field of hybrid automobile transmissions. The mechanical gear pump and the electronic gear pump are connected in parallel, the oil inlet end is communicated with the oil cavity, and the oil outlet end is communicated with the first oil way; the first oil way is communicated with a main oil pressure adjusting valve set, an electromagnetic valve pressure limiting valve set, a brake electromagnetic valve and a clutch electromagnetic valve. The main oil pressure regulating valve group is communicated with the second oil way, the cooler, the front-end friction pair, the rear-end friction pair and the main oil pressure control electromagnetic valve; the electromagnetic valve pressure limiting valve group is communicated with the main oil pressure control electromagnetic valve and the cooling flow control electromagnetic valve; the flow regulating valve group is communicated with the cooling flow control electromagnetic valve, the cooler, the generator and the driving motor; the brake electromagnetic valve is communicated with the brake; the clutch electromagnetic valve is communicated with the clutch; the technical effects that the cooling flow of the driving motor and the generator is dynamically and accurately regulated and controlled, system redundancy is reduced, the manufacturing cost is reduced, and the overall efficiency of a hydraulic system is improved are achieved.

The pressure limiting valve comprises a valve element and a valve body surrounding the periphery of the valve element, the valve element comprises a sealing section and an extending section located above the sealing section, the lower end of the sealing section is provided with a sealing transition face used for abutting against an exhaust pipe in a sealing mode, the pressure limiting valve further comprises a valve element support, and the valve element support is arranged on the valve body. The valve element support is arranged on the periphery of the extending section in a sleeving mode to form a valve element assembly together with the valve element, the whole valve element assembly is fixed to the valve body, and the hardness of the valve element support is larger than that of the valve element. The valve element support is arranged on the outer side of the valve element, in the machining process, a clamp of a mold clamps the valve element support from the outer side and does not make direct contact with the valve element, and the hardness of the valve element support is larger than that of the valve element, so that the valve element support can play a role in protecting the valve element, it is guaranteed that the valve element is always kept in a vertical state in the injection molding process; therefore, the product yield is improved.