阅读说明：本技术 一种高压气瓶组件增压转换装置 (High-pressure gas cylinder assembly supercharging conversion device ) 是由 李素强 于 2020-12-29 设计创作，主要内容包括：本发明属于液、气压领域,具体涉及一种高压气瓶组件增压转换装置,包括：增压器、控制单元、高压气瓶组；利用已有的液压高压能源,通过控制单元、增压器对低压气体增压后,再经控制单元储存于高压气瓶组。本发明能够通过该装置利用已有的液压高压能源,在一些高压气瓶消耗快但最低使用压力较高的地方,将众多气瓶中的剩余压力增压后继续使用,增压的过程同时也利用着高压气瓶组的余压压力,以及特有的一级/二级增压能力,充分利用了现有资源,避免了浪费,节约了经费。提高了整体的利用效能。(The invention belongs to the field of liquid and air pressure, and particularly relates to a pressurization conversion device for a high-pressure air bottle assembly, which comprises: the device comprises a supercharger, a control unit and a high-pressure gas cylinder group; the existing hydraulic high-pressure energy is utilized, and the low-pressure gas is pressurized by the control unit and the supercharger and then stored in the high-pressure gas cylinder set by the control unit. The invention can utilize the existing hydraulic high-pressure energy source through the device, in some places where the high-pressure gas cylinders are fast in consumption but the lowest use pressure is higher, the residual pressure in a plurality of gas cylinders is pressurized and then is continuously used, and the pressurizing process simultaneously utilizes the residual pressure of the high-pressure gas cylinder group and the special primary/secondary pressurizing capacity, thereby fully utilizing the existing resources, avoiding waste and saving the expenditure. The overall utilization efficiency is improved.)

1. The utility model provides a high pressure gas cylinder subassembly pressure boost conversion equipment which characterized in that: the method comprises the following steps: the device comprises a supercharger, a control unit and a high-pressure gas cylinder group;

the existing hydraulic high-pressure energy is utilized, and the low-pressure gas is pressurized by the control unit and the supercharger and then stored in the high-pressure gas cylinder set by the control unit.

2. The pressurization converter device for a high-pressure gas cylinder assembly as claimed in claim 1, wherein: the supercharger comprises a cylinder body (1), a composite piston (2), a rod plug assembly (3), a large end cover (4) and a small end cover (5), and 4 cavities A, B, C, D are formed;

the outer wall of the cylinder body (1) is provided with reinforcing and heat dissipation ribs (1-1), a flange plate (1-2) is arranged, and the flange plate (1-2) is connected with the large end cover (4) through a bolt assembly (7); the composite piston (2) is fixed at the left end of the cylinder body (1), the piston and the piston rod of the composite piston (2) are integrated, and are not only moving pistons in the cylinder body (1), but also the piston rod is a cylinder body of a piston rod (3-1) in the rod plug component (3) and is in threaded connection with the small end cover (5); the rod plug component (3) consists of a piston rod (3-1), a piston (3-2), a nut (3-3) and a channel (3-4); the piston (3-2) is a fixed piston in a piston rod of the composite piston (2), the piston rod (3-1) is a fixed piston rod of the cylinder body (1), and a channel (3-4) of a C cavity is arranged in the rod.

3. The pressurization converter device for a high-pressure gas cylinder assembly as claimed in claim 2, wherein: the control unit (8) hydraulic control part comprises: a hydraulic reversing valve (8-1), one-way valves (8-2), (8-3), (8-4), (8-5), (8-6) and a pressure increasing switch (8-7);

an P, R port of the hydraulic reversing valve (8-1) is communicated with a high-pressure hydraulic source, an A port of the hydraulic reversing valve (8-1) is communicated with a B port on the large end cover (4), and the B port of the hydraulic reversing valve (8-1) is communicated with a D port on the small end cover (5); the port P of the one-way valve (8-2) is communicated with the port A of the high-pressure gas cylinder assembly (9), and the port A of the one-way valve (8-2), the ports P of the one-way valves (8-3) and (8-4) and the port B of the pressure increasing switch (8-7) are communicated; the port A of the one-way valve (8-4), the port P of the one-way valve (8-6) and the port C of the rod plug component (3) are communicated; the port A of the one-way valve (8-3), the port P of the one-way valve (8-5), the port A of the pressure-increasing switch (8-7) and the port A on the cylinder body (1) are communicated; the port A of the one-way valve (8-5), the port A of the one-way valve (8-6) and the port B of the high-pressure gas cylinder component (9) are communicated.

4. A pressurization converter device for a high-pressure gas cylinder assembly according to claim 3, wherein:

the supercharger supercharges low-pressure gas including one-stage supercharging.

5. The pressurization converter device for a high-pressure gas cylinder assembly according to claim 4, wherein: the first-stage supercharging is two-pass first-stage supercharging: the composite piston (2) moves rightwards under the action of the air pressure of the cavity A of the air cavity and the action of the liquid cavity D, and the gas of the cavity C is compressed and stored into a high-pressure gas bottle (9-4); during reverse stroke, the composite piston (2) moves leftwards under the action of the air pressure of the cavity C of the air cavity and the action of the liquid cavity B, and the air in the cavity A is compressed and stored into a high-pressure air bottle (9-4).

6. The pressurization converter device for a high-pressure gas cylinder assembly according to claim 4, wherein:

the supercharger pressurizing the low pressure gas further includes two-stage supercharging.

7. The pressurization converter device for a high-pressure gas cylinder assembly according to claim 6, wherein: the secondary pressurization is one-way secondary pressurization, after the air cavity A is pressurized, the hydraulic control part pressurizes the liquid cavity B, the composite piston (2) moves leftwards, the air in the compressed air cavity A flows to an air cavity C through a pressurization switch (8-7) and a one-way valve (8-4), and the volume of the air cavity C is smaller than that of the air cavity A, so that the primary pressurization is completed; the one-way valve (8-2) prevents compressed gas from pressurizing a pressure releasing gas cylinder of the high-pressure gas cylinder group (9); the hydraulic control part pressurizes the liquid cavity D, the pressure relief cylinder of the high-pressure gas cylinder group (9) pressurizes the gas cavity A, the composite piston (2) moves rightwards under the action of the air pressure force of the gas cavity A and the high-pressure force of the liquid cavity D, and gas in the compressed gas cavity C is compressed to the gas cylinder of the high-pressure gas cylinder group (9) through the one-way valve (8-6).

8. The pressurization converter device for a high-pressure gas cylinder assembly as claimed in claim 2, wherein: in the 4 cavities A, B, C, D of the supercharger, the effective acting area A is more than B and more than D and more than C.

9. The pressurization converter device for a high-pressure gas cylinder assembly as claimed in claim 1, wherein: the high-pressure gas cylinder group is provided with a plurality of high-pressure gas cylinders with residual pressure, the outlets of the high-pressure gas cylinders are interconnected, and part of the gas cylinders are used as pressure relief gas cylinders; and the part is used as a pressurized storage gas cylinder.

Technical Field

The invention belongs to the field of liquid and air pressure, and particularly relates to a pressurization conversion device for a high-pressure air bottle assembly.

Background

Many hydraulic systems often use bottled high-pressure cold air, the pressure is generally above 16MPa, and in many cases, after the high-pressure cold air bottle is used, the residual pressure does not meet the pressure requirement of continuous use, but still is higher, for example, in some hydraulic device fatigue tests, the high-pressure cold air bottle cannot be used under 10 MPa. Therefore, the pressure gas cylinder is discharged and purchased fully, which is very waste. Especially, in some places where the pressure of the high-pressure gas cylinders is consumed quickly, the usage amount is large, but the lowest usage pressure is high, the residual pressure in a plurality of gas cylinders is completely wasted. The high-pressure air source is a common high-pressure cold air solution at present, and a hydraulic system which only uses high-pressure cold air frequently for a period of time is wasted, if the bottled high-pressure cold air is purchased, but the lowest using pressure is higher, the residual pressure of the air bottle and the resources of the existing hydraulic system are not utilized, and the efficiency is low.

Disclosure of Invention

The purpose of the invention is:

providing a pressurization conversion device of a high-pressure gas cylinder assembly; the device can make full use of the existing resources and avoid waste. The overall utilization efficiency is improved.

In order to solve the technical problem, the technical scheme of the invention is as follows:

a high pressure cylinder assembly boost converter device comprising: the device comprises a supercharger, a control unit and a high-pressure gas cylinder group;

the existing hydraulic high-pressure energy is utilized, and the low-pressure gas is pressurized by the control unit and the supercharger and then stored in the high-pressure gas cylinder set by the control unit.

The supercharger consists of a cylinder 1, a composite piston 2, a rod plug component 3, a large end cover 4 and a small end cover 5, and 4 cavities A, B, C, D are formed;

the outer wall of the cylinder body 1 is provided with reinforcing and heat dissipation ribs 1-1 and a flange plate 1-2, and the flange plate 1-2 is connected with the large end cover 4 through a bolt assembly 7; the composite piston 2 is fixed at the left end of the cylinder 1, the piston and the piston rod of the composite piston 2 are integrated, and are not only moving pistons in the cylinder 1, but also the piston rod is a cylinder of a piston rod 3-1 in the rod plug component 3 and is in threaded connection with the small end cover 5; the rod plug component 3 consists of a piston rod 3-1, a piston 3-2, a nut 3-3 and a channel 3-4; the piston 3-2 is a fixed piston in a piston rod of the composite piston 2, the piston rod 3-1 is a fixed piston rod of the cylinder 1, and a channel 3-4 of a C cavity is arranged in the rod.

The control unit 8 comprises a hydraulic control part: hydraulic reversing valve 8-1, one-way valves 8-2, 8-3, 8-4, 8-5, 8-6 and pressure-increasing switch 8-7;

an P, R port of the hydraulic reversing valve 8-1 is communicated with a high-pressure hydraulic source, an A port of the hydraulic reversing valve 8-1 is communicated with a B port on the large end cover 4, and the B port of the hydraulic reversing valve 8-1 is communicated with a D port on the small end cover 5; the port P of the one-way valve 8-2 is communicated with the port A of the high-pressure gas cylinder assembly 9, and the port A of the one-way valve 8-2, the ports P of the one-way valves 8-3 and 8-4 and the port B of the pressure-increasing switch 8-7 are communicated; the port A of the one-way valve 8-4, the port P of the one-way valve 8-6 and the port C of the rod plug component 3 are communicated; the port A of the one-way valve 8-3, the port P of the one-way valve 8-5, the port A of the pressure-increasing switch 8-7 and the port A on the cylinder body 1 are communicated; the port A of the one-way valve 8-5, the port A of the one-way valve 8-6 and the port B of the high-pressure gas cylinder component 9 are communicated.

The supercharger supercharges low-pressure gas including one-stage supercharging.

The first-stage supercharging is two-pass first-stage supercharging: the composite piston 2 moves rightwards under the action of the air pressure of the cavity A of the air cavity and the action of the liquid cavity D, and the gas of the cavity C is compressed and stored into a high-pressure gas cylinder 9-4; during reverse stroke, the composite piston 2 moves leftwards under the action of the air pressure of the cavity C of the air cavity and the action of the liquid cavity B, and the air in the cavity A is compressed and stored in the high-pressure air bottle 9-4.

The supercharger pressurizing the low pressure gas further includes two-stage supercharging.

The secondary pressurization is one-way secondary pressurization, after the air cavity A is pressurized, the hydraulic control part pressurizes the liquid cavity B, the composite piston 2 moves leftwards, the air in the compressed air cavity A flows to the air cavity C through the pressurization switch 8-7 and the one-way valve 8-4, and the volume of the air cavity C is smaller than that of the air cavity A, so that the primary pressurization is completed; the one-way valve 8-2 is used for preventing compressed gas from pressurizing the pressure relief gas cylinder of the high-pressure gas cylinder group 9; the hydraulic control part pressurizes the liquid cavity D, the high-pressure gas cylinder group 9 pressure relief gas cylinder pressurizes the gas cavity A, the composite piston 2 moves rightwards under the action of the air pressure force of the gas cavity A and the high-pressure force of the liquid cavity D, and gas in the compressed gas cavity C is compressed to the gas cylinder of the high-pressure gas cylinder group 9 through the one-way valve 8-6.

In the 4 cavities A, B, C, D of the supercharger, the effective acting area A is more than B and more than D and more than C.

The high-pressure gas cylinder group is provided with a plurality of high-pressure gas cylinders with residual pressure, the outlets of the high-pressure gas cylinders are interconnected, and part of the gas cylinders are used as pressure relief gas cylinders; and the part is used as a pressurized storage gas cylinder.

The invention has the technical effects that: the existing hydraulic high-pressure energy can be utilized through the device, residual pressure in a plurality of gas cylinders is pressurized and then continuously used at places where some high-pressure gas cylinders are fast in consumption but the lowest use pressure is higher, the residual pressure of a high-pressure gas cylinder group and the unique primary/secondary pressurization capacity are also utilized in the pressurization process, the existing resources are fully utilized, the waste is avoided, and the expenditure is saved. The overall utilization efficiency is improved.

Drawings

FIG. 1 is a schematic view of the structure of the apparatus of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples:

as shown in fig. 1, a pressurization conversion device for a high-pressure gas cylinder assembly comprises a supercharger, a control unit and a high-pressure gas cylinder assembly. The existing hydraulic high-pressure energy can be utilized, and the low-pressure gas is pressurized in a first-stage (second-stage) manner through the control unit and the supercharger and then stored in the high-pressure gas cylinder set through the control unit.

The supercharger consists of a cylinder body 1, a composite piston 2, a rod plug component 3, a large end cover 4 and a small end cover 5, and 4 cavities A, B, C, D are formed.

The outer wall of the cylinder body 1 is provided with reinforcing and heat dissipation ribs 1-1 and a flange plate 1-2, and the flange plate 1-2 is connected with the large end cover 4 through a bolt assembly 7. The composite piston 2 is fixed at the left end of the cylinder 1 through a big nut 6, the piston and the piston rod are integrated, the composite piston is a moving piston in the cylinder 1, and the piston rod is a cylinder of a piston rod 3-1 in the rod plug component 3 and is in threaded connection with the small end cover 5. The rod plug component 3 consists of a piston rod 3-1, a piston 3-2, a nut 3-3 and a channel 3-4. The piston 3-2 is a fixed piston in a piston rod of the composite piston 2, the piston rod 3-1 is a fixed piston rod of the cylinder 1, and a channel 3-4 of a C cavity is arranged in the rod.

The hydraulic control part of the control unit 8 mainly consists of a hydraulic reversing valve 8-1. The pneumatic control part consists of one-way valves 8-2, 8-3, 8-4, 8-5 and 8-6 and a pressure increasing switch 8-7. An P, R port of the hydraulic reversing valve 8-1 is communicated with a high-pressure hydraulic source, an A port of the hydraulic reversing valve 8-1 is communicated with a B port on the large end cover 4, and the B port of the hydraulic reversing valve 8-1 is communicated with a D port on the small end cover 5. The port P of the one-way valve 8-2 is communicated with the port A of the high-pressure gas cylinder assembly 9, and the port A of the one-way valve 8-2, the ports P of the one-way valves 8-3 and 8-4 and the port B of the pressure-increasing switch 8-7 are communicated. The port A of the one-way valve 8-4, the port P of the one-way valve 8-6 and the port C of the rod plug component 3 are communicated. The port A of the one-way valve 8-3, the port P of the one-way valve 8-5, the port A of the pressure-increasing switch 8-7 and the port A on the cylinder body 1 are communicated. The port A of the one-way valve 8-5, the port A of the one-way valve 8-6 and the port B of the high-pressure gas cylinder component 9 are communicated.

In the 4 cavities A, B, C, D of the supercharger, the effective acting area A is more than B and more than D and more than C; the diameter of the cavity B cylinder of the structure is consistent with that of the cavity A cylinder, and the effective action area of the cavity B cylinder is easy to approach the effective action area of the cavity A, so that the utilization rate of the hydraulic pressure of the cavity B is high, the primary supercharging pressure is high, and the supercharging efficiency is high; the effective acting area of the cavity D of the structure is larger than that of the cavity C, and secondary pressurization is easy to realize.

In the high-pressure gas cylinder component pressurization conversion device, the pressure and the area of each cavity need to meet the following requirements:

1) the composite piston 2 moves to the right: (Pa × A1+ Pd × D1) > (Pb × B1+ Pc × C1)

2) The compound piston 2 moves to the left: (Pb. times.B 1+ Pc. times.C 1) > (Pa. times.A 1+ Pd. times.D 1)

Wherein: pa- -pressure of air cavity A; a1- -effective area of action of pressure in air cavity A;

pb- -air cavity C pressure; b1- -effective area of action of pressure of air cavity C;

pc- -liquid chamber B pressure; c1-effective area of action of pressure in liquid cavity B;

pd — liquid chamber D pressure; d1-effective area of action of pressure in the fluid chamber D;

the first-stage supercharging is two-way supercharging: the pressure increasing switch 8-7 is closed, the hydraulic reversing valve 8-1 is positioned at the right position, the P, B ports are communicated, hydraulic high-pressure oil enters the D cavity of the pressure increasing device, the 9A port of the high-pressure gas cylinder outputs air pressure, the air pressure is transmitted to the A port of the gas cavity through the P, A ports of the one-way valves 8-2 and 8-3, the composite piston 2 moves rightwards under the action force of the hydraulic pressure of the liquid cavity D and the pressurizing pressure of the A cavity (residual pressure of the pressure releasing gas cylinder of the high-pressure gas cylinder group 9), and the gas of the compressed C cavity is transmitted to the 9B port of the high-pressure gas cylinder through the P, A port of the one-way valve. During reverse stroke, the hydraulic reversing valve 8-1 is in the left position, the P, A ports are communicated, hydraulic high-pressure oil enters the cavity B of the supercharger through the cavity B of the supercharger, the air pressure is output from the port 9A of the high-pressure air bottle, the hydraulic high-pressure oil passes through the ports P, A of the one-way valves 8-2 and 8-4 and the channel 3-1 to the cavity C of the air cavity, the composite piston 2 moves leftwards under the action of the air pressure of the cavity C and the hydraulic force of the cavity B, and the air in the cavity A is compressed to the port 9B of the high-pressure air bottle through the port P, A of the one-way valve 8-5.

The two-stage supercharging is one-way two-stage supercharging; when the pressure of the gas storage cylinder is gradually increased, the residual pressure of the gas discharge cylinder is gradually reduced, and the composite piston 2 moves leftwards and cannot meet (Pb multiplied by B1+ Pc multiplied by C1) > (Pa multiplied by A1+ Pd multiplied by D1); the characteristics that A1 and D1 are far larger than C1 and B1 are utilized to implement two-stage pressurization. The boost switch 8-7 is opened. After the air cavity A is pressurized, the hydraulic reversing valve 8-1 is positioned at the left position, the P, A ports are communicated, hydraulic high-pressure oil enters the cavity B of the booster through the port B of the booster, the air pressure is output from the port 9A of the high-pressure gas cylinder, the air pressure passes through the ports P, A of the one-way valves 8-2 and 8-4 and the channel 3-1 to the cavity C of the air cavity, the composite piston 2 moves leftwards under the action of the air pressure of the cavity C and the hydraulic pressure of the cavity B, and the air in the compressed air cavity A passes through the pressurizing switch 8-7 and the one-way valve 8-4 to the air cavity C. And the one-way valve 8-2 is used for preventing the compressed gas from pressurizing the pressure releasing gas cylinder of the high-pressure gas cylinder group 9. After the first-stage pressurization is completed,

the right position of the hydraulic reversing valve 8-1 is communicated with the port P, B, hydraulic high-pressure oil enters the cavity D of the supercharger, the port 9A of the high-pressure gas cylinder outputs air pressure, the air pressure is transmitted to the port A of the gas cavity through the ports P, A of the one-way valves 8-2 and 8-3, the composite piston 2 moves rightwards under the action of the hydraulic pressure of the liquid cavity D and the pressurizing pressure of the cavity A (residual pressure of the high-pressure gas cylinder 9 for releasing pressure), and the gas in the compressed cavity C is stored to the port 9B of the high-pressure gas cylinder through the port P, A of the one-way valve 8-6. Completing a one-way two-stage supercharging process.

In the 4 cavities A, B, C, D of the supercharger, the effective acting area A is more than B and more than D and more than C; the effective action area of the cavity A is far larger than that of the cavity C, if no external hydraulic high-pressure source exists, pressure gas can be input into the cavity A, the pressure of the pressurized high-pressure gas is output from the cavity C by utilizing the large pressurization ratio of the cavity A/C, the residual pressure gas of the high-pressure gas bottle is pressurized and then continuously used, and reciprocating compression can be realized only by arranging related valves. The function of the supercharger is only described here, and the relevant valves are not described again.

Examples

The test of accessories of certain hydraulic containers is a fatigue test, the using condition is that the cavity of a test piece is pressurized to 10MPa at certain intervals, and the air tightness is detected. Only the high-pressure air source is needed in the fatigue test period, and the high-pressure air source does not need to be established at high cost. So a high-pressure cold air bottle is used as the air source. The test piece holds the chamber great, and after 2 test pieces were pressurized to a gas cylinder several times, pressure just dropped and is less than 10MPa, does not satisfy 10MPa test piece atmospheric pressure requirement, can't use again. Thus, for the fatigue test, the number of cylinders required for the gas pressure detection is large, and the remaining 10MPa of gas is wasted.

The device can solve the problem well. This example

1. A first-stage pressurization mode:

one of the high-pressure gas cylinders with the pressure lower than 10MPa is defined as a storage gas cylinder 9-4, and the other gas cylinders are defined as pressure release gas cylinder groups 9-1, 9-2 and 9-3.

1) The right side of a hydraulic reversing valve 8-1 of a hydraulic control part of a control unit is electrified, the hydraulic reversing valve 8-1 is positioned at the right position, high-pressure hydraulic oil enters a cavity D of a liquid cavity, meanwhile, pressure release cylinder groups 9-1, 9-2 and 9-3 charge a pressure boosting conversion device air cavity A through check valves 8-2 and 8-3 of the control unit, a composite piston 2 moves rightwards under the action of the charging pressure of the air cavity A (residual pressure of a pressure release cylinder of the high-pressure cylinder group 9) and the hydraulic high-pressure action of the liquid cavity D, and the gas of a cavity C is compressed and stored in the high-pressure gas cylinder 9-4 through a check valve 8-6.

2) After the composite piston 2 moves rightwards and is compressed, the left side of a hydraulic reversing valve 8-1 is electrified, the hydraulic reversing valve 8-1 is positioned at the left position, high-pressure hydraulic oil enters a liquid cavity B, meanwhile, pressure relief cylinder groups 9-1, 9-2 and 9-3 charge a gas cavity C of a pressure-boosting conversion device through control unit one-way valves 8-2 and 8-4, the composite piston 2 moves leftwards under the action of the charging pressure of the gas cavity C (residual pressure of a pressure relief cylinder of the high-pressure gas cylinder group 9) and the hydraulic action of the liquid cavity B, and the gas of a cavity A is compressed and is stored in the high-pressure gas cylinder 9-4 through a one-way valve 8-5.

3) The composite piston 2 compresses the air in the air cavity to be stored in the high-pressure air cylinder group 9 in a reciprocating mode. Until the pressure of the high-pressure gas cylinder 9-4 meets the requirement (> 10 MPa). The pressure boost conversion device dissipates heat through the reinforcing and heat dissipating ribs 1-1.

2. A two-stage pressurization mode:

when the pressure of the gas storage cylinder is gradually increased, the residual pressure of the gas discharge cylinder is gradually reduced, and the composite piston 2 moves leftwards and cannot meet (Pb multiplied by B1+ Pc multiplied by C1) > (Pa multiplied by A1+ Pd multiplied by D1); the characteristics that A1 and D1 are far larger than C1 and B1 are utilized to implement two-stage pressurization, and a pressurization switch 8-7 is turned on.

1) The right side of a hydraulic reversing valve 8-1 is electrified, high-pressure hydraulic oil enters a cavity D of a liquid cavity, meanwhile, a pressure relief cylinder group 9-1, a pressure relief cylinder group 9-2 and a pressure relief switch 8-3 charge pressure to a pressure relief conversion device air cavity A through a control unit one-way valve 8-2 and a pressure boost switch 8-7, and the pressure of an air storage cylinder is higher than that of the pressure relief cylinder group, so that gas in the pressure relief cylinder group cannot enter the air storage cylinder 9-4 through the one-way valve 8-2;

2) after the air cavity A is pressurized, the left side of the hydraulic reversing valve 8-1 is electrified, the left position of the hydraulic reversing valve 8-1 is communicated with the port P, A, hydraulic high-pressure oil enters the cavity B of the supercharger, the composite piston 2 moves leftwards under the action of hydraulic high-pressure force, because the pressure of the air storage cylinder is high, the area of the air cavity A is large, the pressure of the air cavity A cannot be directly compressed to the pressure of the air storage cylinder by virtue of the air pressure of the cavity C and the hydraulic pressure of the cavity B, namely (Pb multiplied by B1+ Pc multiplied by C1) > (Pa multiplied by A1+ Pd multiplied by D1) cannot be met, then the air of the air cavity A passes through the pressurizing switch 8-7, the check valve 8-4 reaches the air cavity C, and. And the one-way valve 8-2 is used for preventing the compressed gas from pressurizing the pressure releasing gas cylinder of the high-pressure gas cylinder group 9.

3) The right side of the hydraulic reversing valve 8-1 is electrified, the hydraulic reversing valve 8-1 is positioned at the right position, the hydraulic control part charges high-pressure hydraulic oil into the liquid cavity D, the air cavity A is charged with pressure at the same time, the composite piston 2 moves rightwards under the action of the hydraulic pressure of the liquid cavity D and the air pressure of the cavity A, the air in the air cavity C is compressed again, and the air is stored into the air storage bottle 9-4 through the one-way valve 8-6. The two-stage supercharging is completed by utilizing the characteristic that A1 and D1 are far larger than C1 and B1.

4) Repeating the above processes to complete the pressurizing work of the batch.

The multiple groups of test pieces complete hydraulic high-pressure circulation tests for dozens of thousands of times, and air pressure detection tests are performed for more than one hundred times in total. The test piece is fully examined through tests and examinations, and the purpose of the test is achieved.

The device makes full use of the advantages of the existing hydraulic high-pressure energy sources, utilizes the residual pressure of all gas cylinders, does not need to purchase a high-pressure gas source, does not need to purchase excessive bottled high-pressure cold air, saves the test expenditure, and creates a new method and provides a new idea and a new device for similar requirements.