CN220059831U - Gas supercharging device - Google Patents

Abstract

The utility model discloses a gas supercharging device, which relates to the technical field of gas supercharging and comprises a low-pressure assembly, a high-pressure assembly and a piston assembly; the high-pressure assembly and the low-pressure assembly are arranged up and down, and the inner parts of the high-pressure assembly and the low-pressure assembly are provided with piston cavities which are communicated; the piston assembly comprises a low-pressure cylinder piston, a booster cylinder piston and a piston connecting rod for connecting the low-pressure cylinder piston and the booster cylinder piston, and the low-pressure cylinder piston and the booster cylinder piston are respectively and slidably assembled in piston cavities in the low-pressure assembly and the high-pressure assembly; and a double-cone retainer ring lip-shaped sealing structure for sealing the pressurizing cylinder piston and the piston cavity is arranged between the pressurizing cylinder piston and the piston cavity. The lip seal structure of the double-cone retainer ring has double sealing effects, namely, the lip seal ring is utilized to seal the piston and the piston cavity of the booster cylinder by utilizing two sealing lips, and the gap is eliminated by utilizing self-tightening of the double-cone retainer ring to seal the piston and the piston cavity of the booster cylinder, so that high-pressure medium is prevented from passing through the gap.

Description

Gas supercharging device

Technical Field

The utility model relates to the technical field of gas pressurization, in particular to a gas pressurization device.

Background

In certain industrial applications, it is often desirable to utilize a pressurized gas supply system to provide high pressure gas to a device. For example, a pressurized gas supply system is used to reliably supply a normal temperature and high pressure gas having a maximum operating pressure of about 100MPa to the heater apparatus.

The supercharging air supply system mainly comprises a gas supercharging device, a low-pressure air source, a compressed air source, a valve, a pipeline and the like, wherein the gas supercharging device is a core component of the supercharging air supply system and mainly comprises a low-pressure cylinder and a supercharging cylinder, the supercharging cylinder bears extremely high pressure (such as 100 MPa), a high-pressure sealing structure of an internal piston is particularly important, if the sealing is unstable, the high-pressure gas in the supercharging cylinder is extremely easy to enter the other side of the piston to cause sealing failure, and the operation of the gas supercharging device is influenced.

The high-pressure sealing structure in the prior art has two main structural forms, one is a sealing structure with a tersburg seal under extremely high pressure, two check rings can not be tightly adhered to a tight cover after the structure, gaps are easy to generate, and a front-end lip-shaped sealing ring is extremely easy to press into the gaps of the check rings to form a blocking phenomenon. The elastic lip of the lip-shaped sealing ring is connected with the rear end in a thinner thickness and is easy to deform. The other is a constant sealing structure of the vehicle, the main structure is combined sealing of an O-shaped ring and a sliding ring, the O-shaped ring of the structure is easy to deform and extrude, the sliding ring is made of PTFE, and the sealing is not easy to achieve molecular level.

In addition, a stoneley seal is also a common high pressure seal structure. The sealing device comprises a sealing device, a sealing device and a sealing device, wherein the sealing device comprises an O-shaped rubber sealing ring and a polytetrafluoroethylene sealing ring, the O-shaped rubber sealing ring is used as a sealing force source, and when the pressure is 0, the sealing force is formed by acting on the polytetrafluoroethylene sealing ring through the elastic force of the O-shaped rubber sealing ring in self pre-deformation. When bearing pressure, the gas pressure acts on the O-shaped rubber seal and compresses, so that the polytetrafluoroethylene seal generates higher sealing acting force. The higher the pressure is, the more reliable the seal is, and the polytetrafluoroethylene has a certain self-lubricating function.

In the prior art, few documents related to ultra-high pressure sealing material selection and structure are adopted, in the documents which can be queried in the prior art, fan Xing et al adopt ABAQUS software to establish a two-dimensional axisymmetric model of a Y-shaped sealing structure (a rubber ring and a metal ring) of the warm isostatic pressing complete equipment, the contact stress changes under the pressure of 0, 50, 100, 150 and 200MPa are analyzed, and a sealing test is carried out in the warm isostatic pressing complete equipment, wherein the sealing structure can realize sealing at 300 ℃ and 200MPa, oil liquid does not leak, and the oil does not leak after the pressure is maintained for 10 minutes. Zhao Minmin et al established a two-dimensional axisymmetric model of a Y-shaped seal ring for a 20T excavator bucket cylinder piston rod by using finite element analysis software ANSYS, and contact surface contact pressure at oil pressure of 34.3 MPa. Wang Gang et al analyzed the deformation and maximum contact stress of the hydraulic mount with Y-shaped seal rings at 0-31.5 MPa. Du Guxi et al employ finite element analysis of the sealing characteristics of a Y-shaped seal for a hydraulic cylinder piston rod in a dynamic and static sealing state, with a pressure range of 0-30MPa.

In view of the foregoing, in combination with the high-pressure sealing structure in the prior art, a new gas pressurizing device with a high-pressure sealing structure is needed.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a gas supercharging device, and the utility model provides a novel sealing structure based on the advantages of a super-high pressure sealing structure and a constant-pressure sealing structure of a vehicle and the existing high-pressure Y-shaped sealing structure.

In order to achieve the above purpose, the present utility model adopts the technical scheme that:

a gas pressurizing device comprising a low pressure assembly, a high pressure assembly and a piston assembly;

the high-pressure assembly and the low-pressure assembly are arranged up and down, and the inner parts of the high-pressure assembly and the low-pressure assembly are provided with piston cavities which are communicated; the piston assembly comprises a low-pressure cylinder piston, a booster cylinder piston and a piston connecting rod for connecting the low-pressure cylinder piston and the booster cylinder piston, and the low-pressure cylinder piston and the booster cylinder piston are respectively and slidably assembled in piston cavities in the low-pressure assembly and the high-pressure assembly;

the piston cavity below the low-pressure cylinder piston forms a low-pressure cavity, the piston cavity between the low-pressure cylinder piston and the booster cylinder piston forms a buffer cavity, the piston cavity above the booster cylinder piston forms a high-pressure cavity, the interiors of the low-pressure cavity, the buffer cavity and the high-pressure cavity are filled with flowing media, and the side walls of the low-pressure cavity, the buffer cavity and the high-pressure cavity are provided with medium inlet and outlet channels communicated with the outside;

and a double-cone retainer ring lip-shaped sealing structure for sealing the pressurizing cylinder piston and the piston cavity is arranged between the pressurizing cylinder piston and the piston cavity.

Preferably, the double-cone retainer ring lip seal structure comprises a lip seal ring, an upper retainer ring, a lower retainer ring and a middle retainer ring;

two sealing lips are arranged at the top of the lip-shaped sealing ring and are respectively in contact and seal with the piston of the pressurizing cylinder and the side wall of the cavity of the piston; the side wall of the piston of the pressurizing cylinder is provided with a fixed groove, the lip-shaped sealing ring is arranged at the upper part of the fixed groove, and the upper check ring, the lower check ring and the middle check ring are arranged at the lower part of the fixed groove;

the back parts of the upper and lower check rings are propped against the piston of the pressurizing cylinder, and the front surfaces of the upper and lower check rings are provided with conical openings; the middle check ring is of a conical structure and is embedded into the conical opening, and the back of the middle check ring abuts against the side wall of the piston cavity;

under the action of force, the upper check ring, the lower check ring and the middle check ring respectively generate inward and outward acting forces to push the upper check ring, the lower check ring and the middle check ring to respectively move inward and outward, so that a gap between the piston of the pressurizing cylinder and the side wall of the cavity of the piston is eliminated and sealed.

Preferably, lubricating grease is added into a sealing gap of the lip-shaped sealing ring.

Preferably, the lip-shaped sealing ring is made of perfluoroether rubber, a pressing plate is arranged above the lip-shaped sealing ring, and the pressing plate is detachably arranged beside the fixing groove through a mounting piece.

Preferably, the low pressure assembly comprises a low pressure cylinder and a low pressure cylinder cover, the low pressure cylinder penetrates through the low pressure cylinder up and down, the low pressure cylinder cover is arranged at the bottom of the low pressure cylinder, and a low pressure air inlet and outlet communicated with the low pressure cavity is arranged on the low pressure cylinder cover.

Preferably, the high-pressure assembly comprises a booster cylinder and a booster cylinder cover, the booster cylinder penetrates through the booster cylinder up and down, the booster cylinder cover is arranged at the top of the booster cylinder, and a high-pressure air inlet and outlet communicated with the high-pressure cavity is formed in the booster cylinder cover.

Preferably, the low pressure cylinder and the pressurizing cylinder are of an integrated structure, and a buffer medium inlet and a buffer medium outlet which are communicated with the buffer cavity are formed in the low pressure cylinder and the pressurizing cylinder.

Preferably, the supercharging device further comprises a detection assembly for detecting its operating condition.

Preferably, the detection assembly comprises pressure sensors mounted on the low pressure cylinder head and the booster cylinder head and inserted into the piston cavity.

Preferably, the detection assembly comprises a displacement sensor which is mounted on the low pressure cylinder cover and is vertically inserted upwards into the low pressure cylinder piston and the piston connecting rod.

The utility model has the beneficial effects that:

according to the gas supercharging device provided by the utility model, the gas needing supercharging is introduced into the high-pressure cavity, the low-pressure gas is continuously introduced into the low-pressure cavity, the low-pressure gas drives the low-pressure cylinder piston to move upwards, the low-pressure cylinder piston drives the supercharging cylinder piston to move upwards again, the gas in the high-pressure cavity is compressed to reach the required pressure, and meanwhile, the buffer medium in the buffer cavity buffers the piston to prevent the piston from moving to the limit position to generate larger impact.

The double-cone check ring lip-shaped sealing structure is arranged between the piston of the pressurizing cylinder and the piston cavity and is used for sealing the piston and the piston cavity, the double-cone check ring lip-shaped sealing structure has double sealing effects, the pressurizing cylinder piston and the piston cavity are sealed by two sealing lips of the lip-shaped sealing ring, the gap is eliminated by self-tightening of the double-cone check ring, and the pressurizing cylinder piston and the piston cavity are sealed to prevent a high-pressure medium from passing through the gap.

According to the gas supercharging device provided by the utility model, the lip-shaped sealing ring is provided with two sealing lips, lubricating grease is added into a sealing gap, so that additional lubrication is kept, dry friction and abrasion are reduced, the service life of a sealing element is prolonged, and meanwhile, the back surface of the lip-shaped sealing ring adopts a self-tightening gap elimination sealing structure design. The upper check ring, the lower check ring and the middle check ring are pushed by the force acted on the lip-shaped sealing ring based on the air pressure, and the joint surfaces of the upper check ring, the lower check ring and the middle check ring are of conical structures, so that the upper check ring, the lower check ring and the middle check ring can respectively generate inward and outward acting forces under the action of the force, the gap is eliminated, and a certain sealing effect is achieved.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present utility model;

reference numerals:

1. a gas pressurizing device; 11. a low pressure component; 111. a low pressure cylinder; 112. a low pressure cylinder head; 113. a low pressure gas inlet and outlet; 12. a high voltage component; 121. a pressurizing cylinder; 122. a cylinder head of the pressurizing cylinder; 123. a high pressure gas inlet and outlet; 13. a piston assembly; 131. a low pressure cylinder piston; 132. a booster cylinder piston; 133. a piston connecting rod; 134. a low pressure cavity; 135. a buffer cavity; 136. a high pressure cavity; 137. a buffer medium inlet and outlet; 14. a double cone retainer ring lip seal structure; 141. a lip seal; 142. an upper retainer ring and a lower retainer ring; 143. a middle retainer ring; 144. a pressing plate; 15. a detection assembly; 151. a pressure sensor; 152. a displacement sensor.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model.

Example 1

A gas pressurization device, as shown in fig. 1 and 2, includes a low pressure assembly 11, a high pressure assembly 12, and a piston assembly 13.

The high-pressure component 12 and the low-pressure component 11 are arranged up and down, and the inside of the high-pressure component and the low-pressure component are provided with piston cavities which are communicated; the piston assembly 13 includes a low pressure cylinder piston 131, a pressure-increasing cylinder piston 132, and a piston rod 133 connecting the low pressure cylinder piston 131 and the pressure-increasing cylinder piston 132, the low pressure cylinder piston 131 and the pressure-increasing cylinder piston 132 being slidably fitted in piston chambers in the low pressure assembly 11 and the high pressure assembly 12, respectively.

The piston cavity below the low pressure cylinder piston 131 forms a low pressure cavity 134, the piston cavity between the low pressure cylinder piston 131 and the pressure cylinder piston 132 forms a buffer cavity 135, the piston cavity above the pressure cylinder piston 132 forms a high pressure cavity 136, the interiors of the low pressure cavity 134, the buffer cavity 135 and the high pressure cavity 136 are filled with flowing media, and the side walls are provided with media inlet and outlet channels communicated with the outside.

A double cone retainer lip seal 14 is provided between the booster cylinder piston 132 and the piston cavity for sealing the two.

In this embodiment, low-pressure gas is introduced into the low-pressure chamber 134, a buffer medium is introduced into the buffer chamber 135, and a gas requiring pressurization is introduced into the high-pressure chamber 136. By continuously introducing low-pressure gas into the low-pressure cavity 134, the low-pressure gas drives the low-pressure cylinder piston 131 to move upwards, the low-pressure cylinder piston 131 drives the piston connecting rod 133 to move upwards, and the piston connecting rod 133 drives the pressurizing cylinder piston 132 to move upwards, so that the gas in the high-pressure cavity 136 is compressed to reach the required pressure.

In this embodiment, the inner diameter of the piston cavity of the high pressure assembly 12 is smaller than the inner diameter of the piston cavity of the low pressure assembly 11. When compression and pressurization are carried out, the volume of the buffer cavity 135 is reduced, the buffer medium flows back outwards, a valve can be arranged on an outwards flowing back pipeline, the flowing back flow of the buffer medium is limited by controlling the opening of the valve, and then the buffer force of the buffer medium in the buffer cavity 135 on the piston is controlled, so that the purpose of buffering and decelerating the piston is achieved. The piston is buffered by the buffer medium in the buffer cavity 135 to prevent a large impact from being generated when it moves to the limit position.

The booster cylinder piston 132 is subjected to a higher pressure when it moves. In the embodiment, the double-cone retainer ring lip seal structure 14 is arranged on the side wall of the double-cone retainer ring, the two sealing lips of the lip seal ring are used for sealing the piston 132 and the piston cavity of the pressurizing cylinder, and the double-cone retainer ring is used for self-tightening to eliminate a gap so as to prevent a medium from passing through the gap.

Example 2

The present embodiment is further described on the basis of embodiment 1, and as shown in fig. 1 and 2, the double-cone retainer lip seal structure 14 includes a lip seal ring 141, an upper retainer ring 142, a lower retainer ring 142, and a middle retainer ring 143; the top of the lip-shaped sealing ring 141 is provided with two sealing lips which are respectively contacted and sealed with the booster cylinder piston 132 and the side wall of the piston cavity; a fixed groove is formed in the side wall of the booster cylinder piston 132, a lip-shaped sealing ring 141 is arranged at the upper part of the fixed groove, and an upper check ring 142, a lower check ring 143 and a middle check ring 143 are arranged at the lower part of the fixed groove; the back of the upper and lower check rings 142 is propped against the piston 132 of the booster cylinder, and the front of the upper and lower check rings 142 is provided with a conical opening; the middle check ring 143 is of a conical structure and is embedded into the conical opening, and the back of the middle check ring 143 abuts against the side wall of the piston cavity; the upper and lower retainer rings 142 and the middle retainer ring 143 generate inward and outward forces, respectively, under the force, pushing the upper and lower retainer rings 142 and the middle retainer ring 143 to move inward and outward, respectively, eliminating and sealing the gap between the booster cylinder piston 132 and the piston cavity side wall. Grease is added to the seal gap of the lip seal 141. The lip-shaped sealing ring 141 is made of perfluoroether rubber, a pressing plate 144 is arranged above the lip-shaped sealing ring 141, and the pressing plate 144 is detachably arranged beside the fixed groove through a mounting piece.

In this embodiment, the sealing structure is a double cone retainer ring plus lip sealing structure. The lip-shaped sealing ring 141 is designed with two sealing lips, grease is added into the sealing gap, so that additional lubrication is maintained, dry friction and abrasion are reduced, the service life of a sealing element is prolonged, and the back of the lip-shaped sealing ring adopts a self-tightening gap elimination sealing structure design. The structural working principle is to push the upper and lower check rings 142 and the middle check ring 143 based on the force of air pressure acting on the lip seal 141. Because the joint surfaces of the upper retainer ring 142, the lower retainer ring 142 and the middle retainer ring 143 are of conical structures, the upper retainer ring 142, the lower retainer ring 142 and the middle retainer ring 143 respectively generate inward and outward acting forces under the action of force, so that gaps are eliminated and a certain sealing effect is achieved. The perfluoroether rubber has small elasticity, cannot be installed in the fixing groove during assembly, adopts the design structure of the pressing plate 144, the pressing plate 144 is fixed by the inner hexagon screw, and a spring washer is used between the pressing plate 144 and the inner hexagon screw to prevent loosening.

The double-cone retainer ring of the double-cone retainer ring lip seal structure 14 of this embodiment refers to the conical mouth (one-cone retainer ring) of the upper and lower retainer rings 142 and the conical structure (two-cone retainer ring) of the middle retainer ring 143.

In this embodiment, a sealing structure is also provided between the low pressure cylinder piston 131 and the piston chamber, and the sealing structure may be the above-mentioned double cone retainer ring lip sealing structure or a conventional sealing structure.

Example 3

The present embodiment is further described on the basis of embodiment 2, as shown in fig. 1, the low pressure assembly 11 includes a low pressure cylinder 111 and a low pressure cylinder cover 112, the low pressure cylinder 111 penetrates up and down, the low pressure cylinder cover 112 covers the bottom of the low pressure cylinder 111, and a low pressure gas inlet and outlet 113 communicating with the low pressure cavity 134 is provided on the low pressure cylinder cover 112. In this embodiment, by introducing low-pressure gas into the low-pressure gas inlet and outlet 113, the low-pressure gas enters the low-pressure cavity 134 inside the low-pressure cylinder 111, and drives the low-pressure cylinder piston 131 inside the low-pressure cylinder 111 to move upwards, so as to drive the pressure cylinder piston 132 to move to compress the gas.

As shown in fig. 1, the high-pressure assembly 12 includes a pressure cylinder 121 and a pressure cylinder cover 122, the pressure cylinder 121 penetrates up and down, the pressure cylinder cover 122 covers the top of the pressure cylinder 121, and the pressure cylinder cover 122 is provided with a high-pressure air inlet and outlet 123 communicating with the high-pressure cavity 136. In this embodiment, the gas to be pressurized is introduced into the high-pressure gas inlet and outlet 123, and then enters the high-pressure cavity 136, and the volume of the high-pressure cavity 136 is reduced under the movement of the pressurizing cylinder piston 132, so that the gas to be pressurized is pressurized to reach the required pressure, and then is discharged from the high-pressure gas inlet and outlet 123.

As shown in fig. 1, the low pressure cylinder 111 and the pressure cylinder 121 are of an integral structure, and a buffer medium inlet/outlet 137 communicating with the buffer chamber 135 is provided thereon. In this embodiment, the buffer medium is introduced into the buffer medium inlet and outlet 137, so that the buffer medium enters the buffer cavity 135, and the buffer medium buffers the movement of the piston, so as to prevent the piston from moving to the limit position to generate a larger impact damage device.

In this embodiment, the low-pressure air inlet and outlet 113, the high-pressure air inlet and outlet 123 and the buffer medium inlet and outlet 137 are all provided with a plurality of valves for medium inlet and outlet, and the communicating pipelines are provided with valves for controlling the medium to enter the cavity. And simultaneously, the piston can be returned downwards by introducing gas into the high-pressure cavity 136.

Example 4

The present embodiment is further described on the basis of embodiment 3, and as shown in fig. 1, the supercharging device further includes a detecting assembly 15 for detecting an operation state thereof, and the detecting assembly 15 includes a pressure sensor 151 and a displacement sensor 152; the pressure sensor 151 is installed on the low pressure cylinder head 112 and the pressure cylinder head 122 and inserted into the piston chamber, and the displacement sensor 152 is installed on the low pressure cylinder head 112 and inserted vertically upward into the low pressure cylinder piston 131 and the piston rod 133.

The pressure sensor 151 is used to detect the pressure of the medium inside the low pressure chamber 134 and the high pressure chamber 136. The displacement sensor 152 detects the amount of displacement of the piston in the up-and-down motion.

In this embodiment, the low-pressure gas introduced into the low-pressure cavity 134 is nitrogen, the medium introduced into the buffer cavity 135 is buffer water, and the high-pressure cavity 136 is introduced with the gas to be pressurized.

For a better understanding of the present utility model, the following is a complete description of the principles of the utility model:

in use, low pressure gas is introduced into the low pressure chamber 134 through the low pressure gas inlet and outlet 113, a buffer medium is introduced into the buffer chamber 135 through the buffer medium inlet and outlet 137, and a gas requiring pressurization is introduced into the high pressure chamber 136 through the high pressure gas inlet and outlet 123.

When the gas is pressurized, low-pressure gas is continuously introduced into the low-pressure cavity 134, the low-pressure gas increases the volume and pressure of the low-pressure cavity 134, and then drives the low-pressure cylinder piston 131 to move upwards, the low-pressure cylinder piston 131 drives the piston connecting rod 133 to move upwards, the piston connecting rod 133 drives the pressurizing cylinder piston 132 to move upwards, the volume of the high-pressure cavity 136 is reduced, the pressure is increased, and the gas in the high-pressure cavity 136 is compressed to reach the required pressure and is discharged from the high-pressure gas inlet and outlet 123.

In use, the pressure within the high pressure cavity 136 is relatively high and the double cone retainer lip seal 14 double seals the boost cylinder piston 132. The first is to seal the booster cylinder piston 131 and the piston cavity by using two sealing lips of the lip seal 141, and the second is to self-tighten and eliminate the gap by using the upper and lower check rings 142 and the middle check ring 143, seal the booster cylinder piston 132 and the piston cavity, and prevent the high-pressure gas in the high-pressure cavity 136 from entering the buffer cavity 135 from the gap.

While the embodiments of the present utility model have been described in detail, the present utility model is not limited to the examples, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A gas pressurizing device, characterized by comprising a low-pressure assembly (11), a high-pressure assembly (12) and a piston assembly (13);

the high-pressure component (12) and the low-pressure component (11) are arranged up and down, and the inside of the high-pressure component and the low-pressure component are provided with piston cavities which are communicated; the piston assembly (13) comprises a low-pressure cylinder piston (131), a booster cylinder piston (132) and a piston connecting rod (133) for connecting the low-pressure cylinder piston (131) and the booster cylinder piston (132), and the low-pressure cylinder piston (131) and the booster cylinder piston (132) are respectively and slidably assembled in piston cavities in the low-pressure assembly (11) and the high-pressure assembly (12);

the piston cavity below the low-pressure cylinder piston (131) forms a low-pressure cavity (134), a buffer cavity (135) is formed by the piston cavity between the low-pressure cylinder piston (131) and the pressure cylinder piston (132), a high-pressure cavity (136) is formed by the piston cavity above the pressure cylinder piston (132), and flowing media and medium inlet and outlet channels communicated with the outside are respectively filled in the low-pressure cavity (134), the buffer cavity (135) and the high-pressure cavity (136);

a double-cone retainer ring lip seal structure (14) for sealing the two is arranged between the booster cylinder piston (132) and the piston cavity.

2. The gas pressurizing device according to claim 1, wherein the double cone retainer lip seal structure (14) includes a lip seal (141), upper and lower retainers (142) and a middle retainer (143);

two sealing lips are arranged at the top of the lip-shaped sealing ring (141) and are respectively in contact and seal with the pressure cylinder piston (132) and the side wall of the piston cavity; a fixed groove is formed in the side wall of the booster cylinder piston (132), the lip-shaped sealing ring (141) is arranged on the upper part of the fixed groove, and the upper and lower check rings (142) and the middle check ring (143) are arranged on the lower part of the fixed groove;

the back of the upper and lower check rings (142) are propped against the piston (132) of the pressurizing cylinder, and the front surfaces of the upper and lower check rings (142) are provided with conical openings; the middle check ring (143) is of a conical structure and is embedded into the conical opening, and the back of the middle check ring (143) is propped against the side wall of the piston cavity;

under the action of force, the upper check ring (142) and the lower check ring (143) respectively generate inward and outward acting forces to push the upper check ring (142) and the lower check ring (143) to respectively move inward and outward, so that a gap between the piston (132) of the booster cylinder and the side wall of the piston cavity is eliminated and sealed.

3. The gas pressurizing device according to claim 2, wherein grease is added to the sealing gap of the lip seal (141).

4. The gas supercharging device according to claim 2, characterized in that the lip seal (141) is perfluoroether rubber, a pressing plate (144) is arranged above the lip seal (141), and the pressing plate (144) is detachably mounted beside the fixing groove through a mounting piece.

5. The gas supercharging device according to claim 1, characterized in that the low pressure assembly (11) comprises a low pressure cylinder (111) and a low pressure cylinder cover (112), the low pressure cylinder (111) penetrates up and down, the low pressure cylinder cover (112) is arranged at the bottom of the low pressure cylinder (111) in a covering manner, and a low pressure gas inlet and outlet (113) which is communicated with the low pressure cavity (134) is arranged on the low pressure cylinder cover (112).

6. The gas supercharging device according to claim 5, wherein the high-pressure assembly (12) comprises a supercharging cylinder (121) and a supercharging cylinder head (122), the supercharging cylinder (121) penetrates up and down, the supercharging cylinder head (122) is arranged on the top of the supercharging cylinder (121) in a covering mode, and a high-pressure gas inlet and outlet (123) which is communicated with the high-pressure cavity (136) is arranged on the supercharging cylinder head (122).

7. The gas pressurizing device according to claim 6, wherein the low pressure cylinder (111) and the pressurizing cylinder (121) are of an integrated structure, and a buffer medium inlet and outlet (137) which is communicated with the buffer cavity (135) is arranged on the low pressure cylinder.

8. A gas pressurizing device according to claim 6, wherein the pressurizing device further comprises a detection assembly (15) for detecting the operation state thereof.

9. The gas pressurizing device according to claim 8, wherein the detection assembly (15) comprises a pressure sensor (151), the pressure sensor (151) being mounted on the low pressure cylinder head (112) and the pressurizing cylinder head (122) and being inserted into the piston chamber.

10. The gas pressurizing device according to claim 8, wherein the detection assembly (15) comprises a displacement sensor (152), and the displacement sensor (152) is mounted on the low pressure cylinder head (112) and vertically inserted upwards into the low pressure cylinder piston (131) and the piston connecting rod (133).