CN-121139513-B - Self-sealing accumulator charging valve for high-pressure environment and use method thereof

CN121139513BCN 121139513 BCN121139513 BCN 121139513BCN-121139513-B

Abstract

The invention relates to a self-sealing accumulator charging valve for a high-pressure environment and a use method thereof, and belongs to the technical field of charging valves. The inflation valve comprises a valve body, a first one-way valve and a second one-way valve, wherein the valve body is internally provided with an inflation hole, a first placement hole, a first vent hole, a through hole, a second vent hole, a second placement hole and an air inlet hole in a penetrating mode in sequence, and the first one-way valve and the second one-way valve are respectively arranged in the first placement hole and the second placement hole. According to the invention, the two opposite check valve structures are matched with the mechanical mechanism to open the air charging port check valve for air charging, and the air charging port check valve is used for preventing the invasion of external high-pressure fluid after the air charging is completed, so that the safety and the reliability of the energy accumulator system in a high-pressure fluid environment are improved.

Inventors

SHI WENZHUO
HAN HAOYANG
LI SHIZHEN
ZHANG SIHAN
GUO FEN
SUN YIHANG
LI MINGHAO

Assignees

山东大学

Dates

Publication Date: 20260508
Application Date: 20251118

Claims (4)

1. The use method of the self-closeable accumulator charging valve for the high-pressure environment is characterized in that the charging valve comprises a valve body, a first one-way valve and a second one-way valve, wherein the valve body is internally provided with a charging hole, a first placement hole, a first vent hole, a through hole, a second vent hole, a second placement hole and an air inlet hole in a penetrating way in sequence, and the first one-way valve and the second one-way valve are respectively arranged in the first placement hole and the second placement hole; The first check valve comprises a closed valve core, a first spring and an adjusting screw A, wherein the closed valve core is in a stepped shaft shape, the closed valve core is sleeved with the first spring and the adjusting screw A, the closed valve core is arranged in a first arranging hole, the adjusting screw A is fixed in an air charging hole, the large diameter end of the closed valve core passes through a first vent hole and then is in sealing contact with the through hole through a chamfer, and the small diameter end of the closed valve core passes through the adjusting screw A and then is arranged in the air charging hole; the large-diameter end of the closed valve core is provided with a through hole with the top surface extending to the side surface; The closed valve core is connected with an air charging nozzle, the air charging nozzle is connected with an air pump, the small diameter end of the closed valve core is provided with external threads, the air charging nozzle is internally provided with internal threads, and the small diameter end of the closed valve core is connected with the air charging nozzle through threads; the second one-way valve comprises a one-way valve core, a second spring and an adjusting screw B, wherein the one-way valve core is a hollow cylinder with one end open, the one-way valve core is arranged in the second mounting hole, the second spring is arranged in the one-way valve core, one end of the one-way valve core passes through the second vent hole and is in sealing contact with the through hole through a chamfer, the adjusting screw B is arranged in the air inlet hole, the one-way valve core is supported on the adjusting screw B through the second spring, an opening is formed in one end, close to the through hole, of the one-way valve core, and the outer diameter of the one-way valve core is the same as the inner diameter of the second mounting hole; The application method of the self-sealing accumulator charging valve for the high-pressure environment comprises the following steps of: S1, before inflation, an inflation nozzle is mounted on a valve body, in the mounting process, the inflation nozzle firstly contacts a closed valve core and then contacts the valve body, and after the inflation nozzle contacts the valve body, the inflation nozzle continuously rotates to drive the closed valve core to move, the closed valve core is in an open state, and a through hole is communicated with a first vent hole; S2, opening the air pump, introducing high-pressure gas through the charging connector, enabling the high-pressure gas to enter the through hole in the closed valve core through the charging connector, sequentially passing through the first vent hole and the through hole, and enabling the high-pressure gas to prop up the one-way valve core when the gas pressure exceeds the elasticity of the second spring, and enabling the high-pressure gas to enter the energy accumulator through the one-way valve core and the air inlet hole for charging; S3, after rated gas is filled in the accumulator, the air pump is closed, at the moment, no gas is supplied in the valve body, the pressure of the gas in the valve body is smaller than that of the second spring and the gas in the accumulator, the one-way valve core is propped against the through hole to realize one-way sealing, after the charging connector is unscrewed, the closed valve core is propped against the valve body under the action of the elastic force of the first spring, and the charging is completed; S4, if the outside of the inflation hole encounters high-pressure fluid, the impact direction of the fluid is the same as the locking direction of the first one-way valve, so that the sealing effect is only improved under the action of the fluid, the sealing valve core is not opened, and the integral sealing is realized.
2. The method of using a self-closeable accumulator charge valve for high pressure environments of claim 1 wherein the lead of the internal threads of the charge valve is 2 times the lead of the external threads of the small diameter end of the closure valve element.
3. The method of using a self-closeable accumulator charge valve for a high pressure environment of claim 1 wherein the diameter of the large diameter end of the closure spool is the same as the inner diameter of the first mounting hole.
4. A method of using a self-closeable accumulator charge valve for a high pressure environment as claimed in claim 3 wherein the first vent and the second vent have the same inside diameter, the first vent inside diameter being greater than the inside diameters of the first mounting hole, the through hole and the second mounting hole.

Description

Self-sealing accumulator charging valve for high-pressure environment and use method thereof Technical Field The invention relates to a self-sealing accumulator charging valve for a high-pressure environment and a use method thereof, and belongs to the technical field of charging valves. Background The energy accumulator is used as an energy storage and pressure stabilizing element in a hydraulic and pneumatic system, is widely applied to marine observation buoys, diving equipment and other controlled pressure cabin systems, and has the main functions of absorbing and compensating pressure fluctuation in the system through the compressibility of gas (usually nitrogen), or releasing energy under instantaneous high load, and the pre-charging pressure, sealing performance and safety of an inflation system of the energy accumulator are directly related to the stability and service life of the whole system, and an inflation valve such as QXF, NXF and other standard series is usually arranged on an air cavity of the energy accumulator so as to facilitate the inflation or the detection of the gas pressure. The air charging valve is generally composed of a valve body, a valve core, a spring, a sealing ring, a valve seat, an external air charging interface and other parts, and the unidirectional flow of air is controlled mainly by virtue of the spring force and the sealing surface of the valve core and the valve seat. However, when the accumulator is installed in a high-pressure application occasion such as a buoy, a submersible, and the like, the accumulator is often installed in a working cabin surrounded by a high-pressure fluid (such as high-pressure seawater, high-pressure liquid or high-pressure phase-change working medium), at this time, the pressure outside the charging valve may be far higher than the pre-charging pressure inside the accumulator, when the outside of the charging valve of the accumulator contacts the high-pressure fluid, the fluid can prop up the one-way valve, reversely enter the air cavity of the accumulator through the charging valve, so that the liquid or impurities are mixed inside the accumulator, and further gas pollution, diaphragm damage and accumulator failure are caused. For this purpose, the present invention is proposed. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the self-sealing accumulator charging valve for the high-pressure environment and the use method thereof, which are characterized in that the charging port one-way valve is opened by two opposite one-way valve structures and a mechanical mechanism for charging, and the invasion of external high-pressure fluid is prevented by the charging port one-way valve after the charging is completed, so that the safety and the reliability of an accumulator system in the high-pressure fluid environment are improved. The technical scheme of the invention is as follows: the self-closeable accumulator charging valve for the high-pressure environment comprises a valve body, a first one-way valve and a second one-way valve, wherein the valve body is internally provided with a charging hole, a first placement hole, a first vent hole, a through hole, a second vent hole, a second placement hole and an air inlet hole in a penetrating manner in sequence, and the first one-way valve and the second one-way valve are respectively arranged in the first placement hole and the second placement hole; The first check valve comprises a closed valve core, a first spring and an adjusting screw A, wherein the closed valve core is in a stepped shaft shape, the closed valve core is sleeved with the first spring and the adjusting screw A, the closed valve core is arranged in a first arranging hole, the adjusting screw A is fixed in an air charging hole, the large diameter end of the closed valve core passes through a first vent hole and then is in sealing contact with the through hole through a chamfer, and the small diameter end of the closed valve core passes through the adjusting screw A and then is arranged in the air charging hole. According to the invention, preferably, the large-diameter end of the closed valve core is provided with a through hole with the top surface extending to the side surface, and gas enters the first vent hole through the through hole to complete gas conduction. According to the invention, the closed valve core is preferably connected with an air charging nozzle, the air charging nozzle is connected with an air pump, the small diameter end of the closed valve core is provided with external threads, the air charging nozzle is internally provided with internal threads, and the small diameter end of the closed valve core is connected with the air charging nozzle through threads. According to the invention, the lead of the internal thread of the charging connector is 2 times of the lead of the external thread of the small diameter end of the sealing valve core, so that sufficient thread p