A removable repetitive filling and discharging valve for high pressure resistant pressure vessels

Abstract

The present invention discloses a removable repeated inflation and deflation valve for a high-pressure pressure vessel. The inflation valve is installed at the container mouth of the high-pressure pressure vessel. The front end of a ground tooling valve with an inflation nozzle is connected to a connecting seat of the inflation valve. An airway port is provided on the valve body of the inflation valve. A hand wheel is installed at the rear end of the ground tooling valve. The present invention can realize the repeated inflation and deflation process of the pressure vessel by repeatedly rotating the hand wheel. The inflation has high mobility, can be used and charged immediately, and the inflation process is simple and convenient. After the inflation is completed, the ground tooling valve of the present invention can be disassembled, and only the product inflation valve is retained. Compared with the same type of products, the weight is lighter, the appearance is smaller, and the cost is lower.

Description

Technical Field

[0001] The invention relates to a valve, in particular to a removable repeated filling and discharging valve for a high-pressure resistant pressure vessel. Background Art

[0002] For repeatedly used pressure vessels, they need to be filled and deflated multiple times. Due to the high demand for gas, a large amount of gas needs to be stored in a limited volume, which leads to a high working medium pressure in the pressure vessel. Currently, similar products cannot completely solve the high-pressure sealing problem, and a certain amount of gas leakage will occur in the process of replacing the inflation device with a sealing joint. At the same time, due to the repeated use of gas cylinders, the inflation device (inflation valve + ground working valve) needs to have a certain working life so that the pressure vessel can be filled and deflated multiple times.

[0003] The utility model patent with the application name of "A inflation valve" and the publication number of CN 219432538 U discloses an inflation valve. This technical solution solves the sealing problem after inflation to a certain extent, but the reliability of the metal seal for high-pressure gas is low, and the metal diaphragm is difficult to reset after deformation, which greatly shortens the service life of the product. In summary, this structure does not have the ability to be used multiple times and high-pressure sealing performance.

[0004] The invention patent with the application name of multiple-use two-way air valve and air column bag and publication number CN 108408251 A discloses a two-way air valve and a packaging bag. Although the air valve can realize the reuse of the packaging bag, the premise of achieving reuse is that the packaging bag is made of soft material, which is not suitable for pressure vessels made of hard materials. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a removable repeated filling and discharging valve for a high-pressure pressure vessel to solve the following problems: (1) When the pressure vessel is filled with gas to meet the requirements, the high-pressure gas in the pressure vessel presses the valve core of the inflation valve in the opposite direction through the air inlet, thus achieving high-pressure sealing of the working medium of the pressure vessel.

[0006] (2) For pressure vessels that are required to be used repeatedly, this patent can realize the immediate filling of gas and multiple filling and deflation operations. The product has strong mobility and improves the efficiency of filling and deflation.

[0007] This removable repeated filling and deflation valve for high-pressure pressure vessels has a filling valve installed at the container mouth of the high-pressure pressure vessel, a front end of a ground tooling valve with a filling nozzle is connected to the mounting seat of the filling valve, an airway port is provided on the valve body of the filling valve, and a hand wheel is installed at the rear end of the ground tooling valve.

[0008] Further optimized, the inflation valve includes a connecting seat, and the connecting seat is provided with a buffer cavity, a sealing cavity and a valve core cavity along the inflation airflow direction, and the valve core cavity is opened with an airway opening outward.

[0009] Further optimization, the fixed seat of the inflation valve is fixedly connected to the connecting seat, a variable pillar is pressed between the fixed seat and the pressure seat, the variable pillar can be deformed between the fixed seat and the pressure seat, the pressure seat is connected to the valve core and installed in the valve core cavity of the connecting seat, the piston is installed in the sealing cavity of the connecting seat, and the ground tooling valve passes through the buffer cavity and the sealing cavity and contacts the valve core. Further optimization, the hand wheel of the ground tooling valve is connected to the push rod and installed inside the shell, the push rod is in contact with the inflation valve, and an inflation nozzle is provided on the shell.

[0010] Further optimization is performed, the ground tooling valve and the connecting seat are connected via a plug-in connector.

[0011] Further optimization is that a mounting groove for mounting the pressure seat is provided on one side of the valve core, and a sealing surface is provided on the other side.

[0012] Further optimization is that a threaded sleeve is arranged in the buffer cavity, the threaded sleeve is installed in the buffer cavity, and plays a limiting role on the piston, and a retaining ring and a rubber ring are arranged between the sealing cavity and the piston.

[0013] Further optimization is performed by providing a rubber ring between the push rod and the shell.

[0014] Further optimization is performed by providing a rubber ring and a retaining ring between the housing of the ground tooling valve and the connecting seat.

[0015] For further optimization, a clamping step is provided between the connecting seat and the container opening of the pressure container.

[0016] The advantages of the present invention are: (1) The present invention designs a removable repetitively inflatable valve for high-pressure pressure vessels. When the pressure vessel is inflated, the gas enters the cavity through the inflation port of the ground tooling valve. During the inflation process, a combination of multiple rubber rings and retaining rings is used to ensure the sealing of the product. When the inflation is completed, the push rod is unscrewed. At this time, the high-pressure working medium acts on the valve core and seals through the valve core. The higher the pressure, the better the sealing effect of the valve core. In summary, both the inflation and deflation products have good high-pressure sealing characteristics.

[0017] (2) The present invention can realize the repeated filling and deflation process of the pressure container by repeatedly rotating the hand wheel. The maneuverability of the filling is high, and the filling can be realized on the spot. The filling process is simple and convenient.

[0018] (3) After the inflation is completed, the ground tooling valve of the present invention can be disassembled, leaving only the product inflation valve. Compared with similar products, the weight is lighter, the shape is smaller, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the repeated charging and discharging valve; Figure 2 It is a schematic diagram of the structure of the inflation valve; Figure 3 It is a schematic diagram of the connecting seat structure; Figure 4 Schematic diagram of piston structure; Figure 5 It is a schematic diagram of the valve core structure; Figure 6 This is a schematic diagram of the ground tooling valve structure; Figure 7 is a schematic diagram of the shell structure; Figure 8 It is a structural schematic diagram of the valve inflation process; Fig. 9 Schematic diagram of the structure after the valve is inflated.

[0020] Figure numerals: 1-inflating valve, 11-connecting seat, 12-airway opening, 13-fixed seat, 14-pressure seat, 15-variable support, 16-piston, 17-valve core, 18-screw sleeve, 11A-buffer chamber, 11B-sealing chamber, 11C-valve core chamber, 2-ground tooling valve, 21-handwheel, 22-housing, 23-thrust rod, 24-inflating nozzle, 25-plug connector, 26-rubber ring groove, 3-rubber ring, 4-retaining ring, 5-pressure vessel. DETAILED DESCRIPTION

[0021] A removable repeated filling and discharging valve for a high-pressure pressure vessel will be further described below in conjunction with the accompanying drawings.

[0022] The present invention is composed of an inflation valve 1 and a ground tooling valve 2, and the product structure is as follows: Figure 1The removable repetitively inflating and deflation valve for high-pressure pressure vessels has an inflating valve 1 installed at the container port of the high-pressure pressure vessel 5, a front end of a ground tooling valve 2 with an inflating nozzle 24 is connected to a connecting seat 11 of the inflating valve 1 through a plug-in connector 25, and a buffer chamber 11A, a sealing chamber 11B and a valve core chamber 11C are provided along the inflating airflow direction of the connecting seat 111, and the valve core chamber 11C has an airway opening 12 opened outwards. The fixed seat 13 of the inflation valve 1 is fixedly connected to the connecting seat 11, and a variable support 15 is pressed between the fixed seat 13 and the pressure seat 14. The variable support 15 can be deformed between the fixed seat 13 and the pressure seat 14. The pressure seat 14 is connected to the valve core 17 and installed in the valve core cavity 11C of the connecting seat 11. The piston 16 is installed in the sealing cavity 11B of the connecting seat 11. The hand wheel 21 of the ground tooling valve 2 is connected to the push rod 23 and installed inside the housing 22. The push rod 23 contacts the valve core 17 of the inflation valve 1. A mounting groove for mounting the pressure seat 14 is provided on one side of the valve core 17, and a sealing surface is provided on the other side. An inflation nozzle 24 is provided on the housing 22.

[0023] In order to increase the reliability of the sealing of the valve body and the pressure vessel 5, a threaded sleeve is provided in the buffer chamber 11A, and the threaded sleeve is installed in the buffer chamber 11A to limit the piston 16. A retaining ring 4 and a rubber ring 3 are provided between the sealing chamber 11B and the piston 16. A rubber ring 3 is provided between the push rod 23 and the housing 22. A rubber ring 3 and a retaining ring 4 are provided between the housing 22 of the ground tooling valve 2 and the connecting seat 11. A clamping step is provided at the connecting seat 11 and the container mouth of the pressure vessel 5, and the container mouth of the pressure vessel 5 contacts the clamping step of the connecting seat 11.

[0024] The inflation valve 1 includes a connecting seat 11, a piston 16, a valve core 17, a fixed seat 13, a variable support 15, a pressure seat 14, a rubber ring 3, a retaining ring 4, and a screw sleeve. The inflation valve 1 is a component used to provide working medium to the pressure vessel 5 and reversely seal the pressure vessel 5 after inflation. The structural diagram of the inflation valve 1 is shown in Figure 2 .

[0025] The connecting seat 11 is a key component used to connect the inflation valve 1 and the ground tooling valve 2. The connecting seat 11 is connected to the fixed seat 13 by threads. The connecting seat 11 is connected to the ground tooling valve 2 by threads. A buffer chamber 11A, a sealing chamber 11B and a valve core chamber 11C are processed inside. A plug and a piston 16 are placed in the two chambers respectively. After the gas inflation is completed, a secondary seal is achieved through the rubber ring 3 and the retaining ring 4. At the same time, two airway ports 12 are processed on the valve body of the inflation valve 1, that is, the valve body of the valve core chamber 11C of the connecting seat 11. When inflating, it is used to transfer the working medium to the inside of the pressure vessel 5; when deflated, the working medium in the pressure vessel 5 is discharged through the two airway ports 12 and the interface of the ground tooling valve 2 that enters through the inflation valve 1. See the structural schematic diagram of the connecting seat 11. Figure 3 .

[0026] The piston 16 is installed in the sealing chamber 11B of the inflation valve 1, and the gas in the pressure vessel 5 is secondary sealed through the rubber ring 3 and the retaining ring 4. The piston 16 is processed with a tooling thread interface for installing the piston 16. The schematic diagram of the piston 16 is shown in Figure 4 .

[0027] The threaded sleeve 18 is threadedly connected to the inflation valve 1 . The component is installed in the buffer chamber 11A and serves to limit the piston 16 .

[0028] The valve core 17 is installed in the valve core cavity 11C. The valve core 17 is processed with an installation groove for installing the fixed seat 13, and the valve core 17 is processed with an inclined surface, that is, a sealing surface. The valve core 17 and the valve core cavity 11C are sealed with a surface seal. When the pressure vessel 5 is filled with the working medium, the working medium enters the charging valve 1 through the two airway ports 12. At this time, the high-pressure working medium presses the valve core 17, and the high-pressure working medium is sealed after the inclined surface of the valve core 17 is pressed against the connecting seat 11. The schematic diagram of the structure of the valve core 17 is shown in Figure 5 .

[0029] The variable strut 15 is assembled between the fixed seat 13 and the pressure seat 14. When the inflation system is working, the ground tooling valve 2 pushes open the valve core 17, and the position of the valve core 17 is dynamically adjusted by the variable strut 15. The variable strut 15 can adopt a spring.

[0030] The ground tooling valve 2 is composed of a hand wheel 21, a housing 22, a rubber ring 3, a push rod 23, and a retaining ring 4. The hand wheel 21 is rotated to drive the push rod 23 to move, and the push rod 23 pushes the valve core 17 of the inflation valve 1 to realize the inflation and deflation functions of the product. The schematic diagram of the ground tooling valve 2 is shown in Figure 6 .

[0031] The housing 22 is used to connect the hand wheel 21 and the inflation valve 1. The three are connected by threads. The housing 22 is processed with an inflation nozzle 24 on the outside. The inflation nozzle 24 is connected to an external gas source to supply the working medium to the pressure vessel 5. Two rubber ring grooves 26 are processed inside the housing 22 to prevent the working medium from leaking out of the ground tooling valve 2 through the hand wheel 21. The front end of the housing 22 is processed with a plug-in connector 25, which is plug-in connected to the sealing chamber 11B of the inflation valve 1. The working medium is sealed by the rubber ring 3 and the retaining ring 4. The structural diagram of the housing 22 is shown in Figure 7 .

[0032] The hand wheel 21 and the push rod 23 are linkage components. When the pressure vessel is to be inflated, the hand wheel 21 is rotated forward to push the valve core 17 of the inflation valve 1 through the push rod 23 to complete the inflation process of the pressure vessel. When the gas volume in the pressure vessel meets the use requirements, the hand wheel 21 is rotated reversely. At this time, the valve core 17 is reset under the pressure of the working medium. When the pressure vessel is to be deflated, the hand wheel 21 is rotated forward again to push open the valve core 17 through the push rod 23, and the working medium is discharged through the valve channel through the inflation nozzle 24, thereby realizing the deflation of the gas path system.

[0033] Working principle of the present invention: The working principle of the present invention is mainly divided into two stages: a) Inflation phase Connect the inflation valve 1 with the ground tooling valve 2 and the pressure vessel, pump air into the pressure vessel through the inflation port of the ground tooling valve 2, and at the same time rotate the hand wheel 21 forward, and use the push rod 23 to push open the valve core 17. At this time, the inflation valve 1 is open and the pressure vessel is in an inflated state. When the gas volume meets the use requirements, rotate the hand wheel 21 in the opposite direction, and the push rod 23 is withdrawn. The valve core 17 is reset under the preload force of the variable support 15 and the pressure of the working medium, and is sealed through the conical surface of the valve core 17 and the inner cavity of the shell 22 of the inflation valve 1 connection seat 11. See the figure for a schematic diagram of the product structure.

[0034] The ground tooling valve 2 is slowly disassembled from the inflation valve 1. After the disassembly is completed, the piston 16, the first rubber ring 3, the first retaining ring 4 and the plug are respectively assembled in the sealing chamber 11B and the buffer chamber 11A of the inflation valve 1. At this time, the product pressure vessel completes the entire inflation process. At this time, the conical surface seal of the valve core 17 and the two rubber rings 3 of the piston 16 together constitute the sealing structure of the inflation valve 1. The product structure diagram is shown in Figure 8 The ground tooling valve 2 is detachable and need not be carried out with the product for related test tasks.

[0035] b) Degassing phase Disassemble the piston 16, the first rubber ring 3, the first retaining ring 4 and the plug, Fig. 9 Connect the inflation valve 1 to the ground tooling valve 2. At this time, rotate the hand wheel 21 forward to use the push rod 23 to push open the valve core 17. At this time, the working medium in the pressure vessel is finally discharged from the inflation port until the gas in the bottle is completely discharged. At this time, the deflation work of the product is completed.

[0036] Repeating steps a) and b) several times can realize repeated filling and deflating of the pressure vessel.

[0037] The present invention designs a removable repeated filling and deflation valve for high-pressure pressure vessels, which is mainly used for inflating the repeatedly used gas source device on the pressure vessel. When inflating, the pressure vessel is inflated through the charging valve + ground tooling valve. After the inflation volume meets the requirements, the tooling valve is disassembled, and the high-pressure gas in the pressure vessel is used to compress the valve core of the charging valve to achieve reverse sealing of the pressure vessel, which can better ensure the sealing of the elastic gas source. When the product needs to be deflated, the push rod of the ground tooling valve is used to push open the valve core to release the internal gas. This structure can realize the instant filling and repeated use of gas, the product has strong mobility, simple valve body structure and low cost.

[0038] The above shows and describes the basic principles, main structures and advantages of the present invention. It should be understood by those skilled in the art that the present invention may be modified and improved in size and direction without departing from the spirit and scope of the present invention, and these modifications and improvements fall within the scope of the present invention.

Claims

1. A removable repeated filling and discharging valve for a high-pressure pressure vessel, the filling valve being installed at the container port of the high-pressure pressure vessel, characterized in that: The front end of the ground tooling valve with an inflation nozzle is connected to the connecting seat of the inflation valve, an airway port is arranged on the valve body of the inflation valve, and a hand wheel is installed at the rear end of the ground tooling valve.

2. A removable repeated filling and discharging valve for a high-pressure pressure vessel according to claim 1, characterized in that: The inflation valve comprises a connecting seat, and a buffer cavity, a sealing cavity and a valve core cavity are arranged on the connecting seat along the inflation airflow direction, and an airway opening is opened outwards in the valve core cavity.

3. A removable repeated filling and discharging valve for a high-pressure pressure vessel according to claim 2, characterized in that: The fixed seat of the inflation valve is fixedly connected to the connecting seat, and a variable pillar is pressed between the fixed seat and the pressure seat. The variable pillar can be deformed between the fixed seat and the pressure seat. The pressure seat is connected to the valve core and installed in the valve core cavity of the connecting seat. The piston is installed in the sealing cavity of the connecting seat, and the ground tooling valve passes through the buffer cavity and the sealing cavity and contacts the valve core.

4. A removable repeated filling and discharging valve for a high-pressure pressure vessel according to claim 1, characterized in that: The hand wheel of the ground tooling valve is connected with a push rod and installed inside the shell. The push rod is in contact with the inflation valve, and an inflation nozzle is arranged on the shell.

5. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 1, characterized in that: The ground tooling valve and the connecting seat are connected via a plug-in connector.

6. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 3, characterized in that: One side of the valve core is provided with a mounting groove for mounting the pressure seat, and the other side is provided with a sealing surface.

7. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 3, characterized in that: A threaded sleeve is arranged in the buffer cavity, and a retaining ring and a rubber ring are arranged between the sealing cavity and the piston.

8. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 4, characterized in that: A rubber ring is arranged between the push rod and the shell.

9. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 5, characterized in that: A rubber ring and a retaining ring are arranged between the shell of the ground tooling valve and the connecting seat.

10. The removable repeated filling and discharging valve for high-pressure pressure vessels according to claim 1, characterized in that: A clamping step is arranged at the connection seat and the container opening of the pressure container.

Images