CN113701051A

CN113701051A - Pressure regulating device and gas storage equipment with same

Info

Publication number: CN113701051A
Application number: CN202010432703.7A
Authority: CN
Inventors: 陈力维; 何胜凯; 吕沧尧
Original assignee: Bangcha Industry Co ltd
Current assignee: Bangcha Industry Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-11-26
Anticipated expiration: 2040-05-20
Also published as: CN113701051B

Abstract

The invention relates to a pressure regulating device and a gas storage device with the same, wherein the pressure regulating device is provided with a valve pipe assembly, an air inlet assembly, a first pressure regulating assembly and a second pressure regulating assembly, the gas storage device is provided with a gas storage unit and the pressure regulating device, the effect of sectional pressure reduction is achieved by the first pressure regulating assembly and the second pressure regulating assembly so as to maintain the use safety, the pressure regulating device is partially embedded in the gas storage unit so as to reduce the whole volume of the gas storage device, and meanwhile, a high-pressure piston chamber of the valve pipe assembly is communicated with the outside of the gas storage unit through a high-pressure gas channel so as to maintain the normal action of an elastic assembly in the high-pressure piston chamber.

Description

Pressure regulating device and gas storage equipment with same

Technical Field

The invention relates to a pressure regulating device, in particular to a pressure regulating device applied to a high-pressure gas storage unit.

Background

The pressure regulating device is widely used in various devices, and has a pressure regulating component for selectively blocking gas from flowing from a high pressure source into the gas outlet end, and when the gas pressure at the gas outlet end reaches a default value, the pressure regulating component seals the gas flow to maintain the gas pressure at the gas outlet end at a required pressure value. For the larger pressure difference between the high pressure source and the air outlet end, based on safety consideration and pressure regulating accuracy, a multi-section pressure regulating device is derived in the prior art, that is, a plurality of pressure regulating assemblies are provided to reduce the gas pressure to the required gas pressure in sections.

However, the more sets of pressure regulating assemblies mean that the overall volume of the pressure regulating device is increased, and when the pressure regulating device is applied to a portable high-voltage source (such as an air storage unit of an air gun), the increased volume of the multi-stage pressure regulating assembly also increases the volume of the portable high-voltage source, so that the pressure regulating device has the disadvantage of being inconvenient for a user to carry.

Disclosure of Invention

In view of this, the present invention is developed for a multi-stage pressure regulating device applied to a high voltage source, so as to solve the problem of inconvenient carrying due to the increased volume of the multi-stage pressure regulating assembly.

In order to achieve the above object, the present invention provides a pressure regulating device, including:

a valve pipe assembly, wherein an air inlet, an air outlet, a high pressure piston chamber, an intermediate chamber, a low pressure piston chamber and a high pressure exhaust channel are arranged, the air outlet is selectively communicated with the low pressure chamber, the intermediate chamber is selectively communicated with the low pressure chamber, and the high pressure piston chamber is communicated with the outside of the valve pipe assembly through the high pressure exhaust channel;

the air inlet component is arranged at the air inlet hole of the valve pipe component;

a first pressure regulating assembly disposed in the high pressure piston chamber and the intermediate chamber of the valve tube assembly for depressurizing the gas passing through the first pressure regulating assembly and introducing the gas into the intermediate chamber;

and the second pressure regulating assembly is arranged in the low-pressure piston chamber and the low-pressure chamber of the valve pipe assembly, and is used for reducing the pressure of the gas from the intermediate chamber when the gas passes through the second pressure regulating assembly and then guiding the gas into the low-pressure chamber.

Wherein, the valve tube component comprises an outer tube, a first inner tube and a second inner tube; the air inlet and the air outlet are radially arranged on the outer pipe, the high-pressure piston chamber, the medium chamber and the low-pressure chamber are axially arranged in the outer pipe, the high-pressure exhaust channel is arranged in the outer pipe and provided with an axial section and a radial section, the axial section of the high-pressure exhaust channel axially penetrates through the outer pipe and is communicated with the high-pressure piston chamber, the radial section of the high-pressure exhaust channel radially penetrates through the outer pipe, and the first inner pipe is sleeved at the tail end of the outer pipe; the first inner tube is internally provided with a containing chamber which axially penetrates through the first inner tube, and the containing chamber is communicated with the high-pressure exhaust channel; the second inner tube penetrates through the first inner tube, the high-pressure piston chamber axially penetrates through the second inner tube, an elongated slot is formed in the outer wall surface of the second inner tube in an inwards concave mode, a high-pressure exhaust hole radially penetrating through the second inner tube is formed in the elongated slot, the high-pressure exhaust hole is communicated with the high-pressure piston chamber, the high-pressure piston chamber is communicated with the accommodating chamber of the first inner tube through the high-pressure exhaust hole, and the high-pressure piston chamber is further communicated with the high-pressure exhaust channel of the outer tube through the accommodating chamber.

The first pressure regulating assembly is arranged in the first inner pipe and the second inner pipe and comprises a high-pressure piston, a high-pressure connecting piece, a high-pressure regulating piece, a high-pressure elastic element and an airtight piece; the high-pressure piston is arranged in the high-pressure piston chamber of the second inner tube, the high-pressure piston is provided with a crown part and a piston rod, and a high-pressure channel is axially formed in the high-pressure piston in a penetrating way; one end of the high-pressure connecting piece is arranged in the intermediate chamber of the outer pipe in a penetrating way, the other end of the high-pressure connecting piece is arranged in the first inner pipe and the second inner pipe in a penetrating way, and a high-pressure channel is formed in the high-pressure connecting piece in a penetrating way in the axial direction; the high-pressure regulating part is arranged in the high-pressure piston chamber of the second inner pipe in a penetrating way and sleeved outside the piston rod; the high-pressure elastic element is sleeved outside the piston rod of the high-pressure piston and clamped between the crown of the high-pressure piston and the high-pressure regulating piece; the airtight piece is arranged in the tail end of the second inner tube in a plugging mode, abuts against the tail end of a piston rod of the high-pressure piston and is used for selectively sealing a high-pressure channel of the high-pressure piston.

The second pressure regulating assembly is arranged in the outer pipe and comprises a low-pressure piston, a low-pressure connecting piece, a low-pressure elastic element and a plug body; the low-pressure piston is arranged in the low-pressure piston chamber of the outer tube and is provided with a crown part and a piston rod; the low-pressure connecting piece is arranged in the low-pressure chamber and the low-pressure piston chamber in a penetrating way; the low-pressure elastic element is sleeved outside the piston rod of the low-pressure piston and clamped between the crown part of the low-pressure piston and the low-pressure connecting piece; the plug body is arranged in the intermediate chamber of the outer pipe and is mutually fixed with the low-pressure connecting piece, and the plug body selectively seals the communication between the intermediate chamber and the low-pressure chamber.

The plug body is a conical body, the outer diameter of the plug body is wider towards the high-pressure piston chamber, and the outer diameter of the plug body is narrower towards the low-pressure chamber.

The low-pressure piston is provided with a low-pressure channel which axially penetrates through the low-pressure connecting piece, the low-pressure channel is communicated with the low-pressure chamber through the through hole, an opening at one end of the low-pressure channel is communicated with the through hole of the low-pressure connecting piece, and an opening at the other end of the low-pressure channel is connected with the low-pressure gauge.

The air inlet assembly comprises an air inlet sleeve and an air inlet plug, the air inlet sleeve penetrates through the air inlet hole and is provided with a central hole, the air inlet plug is provided with a wide end and a narrow end, the narrow end of the air inlet plug corresponds to the central hole of the air inlet sleeve, and the wide end of the air inlet plug selectively seals the central hole of the air inlet sleeve.

The air outlet assembly comprises an air outlet sleeve and an air outlet plug, the air outlet sleeve is arranged in the air outlet hole in a penetrating mode and provided with a central hole, an inner convex rib formed by radial extension is arranged in the central hole, the air outlet plug is provided with an annular shoulder formed by radial extension, and the annular shoulder of the air outlet plug is selectively abutted against the inner convex rib of the air outlet sleeve.

Wherein, it further includes a high pressure manometer, and this outer tube is provided with a inspection hole radially, and this inspection hole is linked together through this inlet channel and this inlet port, and this high pressure manometer sets up in this inspection hole.

The outer tube is provided with a radial air leakage opening communicated with the low-pressure chamber, and the air leakage assembly is arranged in the air leakage opening of the outer tube and used for discharging the air in the low-pressure chamber for measuring when the air pressure in the low-pressure chamber exceeds a safe air pressure value.

Wherein, the air-release component is provided with an air-release sleeve, an air-release plug and an air-release elastic element; this sleeve pipe of disappointing wears to locate in this disappointing mouth, this sleeve pipe of disappointing has a perforation that radially runs through, this disappointing stopper wears to locate in this sleeve pipe of disappointing, this disappointing stopper selectively seals the perforation of this sleeve pipe of disappointing and the intercommunication state of this low-pressure chamber, this elastic element that loses heart presss from both sides and locates between this disappointing stopper and this inner end face that loses heart, move towards the low-pressure chamber for the ejection air-release stopper, and make the air-release stopper support and lean on the pipe wall flange between low-pressure chamber and disappointing mouth.

Wherein, it further includes an explosion-proof assembly, and this outer tube is provided with an explosion-proof hole radially, and this explosion-proof hole is linked together with this inlet port through an explosion-proof passageway, and this explosion-proof assembly sets up in this explosion-proof hole.

The valve tube assembly comprises an outer tube and an inner tube, the outer tube is sleeved with the inner tube, the air inlet, the high-pressure piston chamber and the intermediate chamber are axially arranged in the inner tube in sequence, the air inlet is arranged at the bottom end of the inner tube, the low-pressure piston chamber and the low-pressure chamber are arranged in the outer tube and correspond to the top end of the inner tube, the air outlet radially penetrates through the outer tube, the high-pressure exhaust channel is provided with a radial section and an axial outlet, the radial section is communicated with the high-pressure piston chamber, and the axial outlet penetrates through the outer tube to enable the high-pressure piston chamber to be communicated with the outside of the valve tube assembly through the high-pressure exhaust channel.

Wherein, the top end of the outer tube is radially extended and formed with a holding part.

The air inlet assembly comprises a puncture unit which is hollow and provided with a tip end and an inner channel, wherein two ends of the inner channel are provided with openings and communicated with the air inlet hole.

Wherein, the first pressure regulating component comprises a high-pressure piston, a high-pressure elastic element, a high-pressure airtight piece and a high-pressure connecting piece, the high-pressure piston is arranged in a high-pressure piston chamber of the inner tube, a step part is arranged in the high-pressure piston chamber, the high-pressure piston is provided with a crown part and a piston rod, an axially arranged high-pressure channel is formed in the high-pressure piston, the high-pressure channel is selectively communicated with the air inlet hole, at least one through hole is radially formed by penetrating through the side edge of the piston rod, the high-pressure elastic element is sleeved outside the piston rod of the high-pressure piston and clamped between the crown part of the high-pressure piston and the step part of the high-pressure piston chamber, the high-pressure airtight piece is abutted against the tail end of the piston rod of the high-pressure piston and selectively seals the communication state between the high-pressure channel and the air inlet hole, the high-pressure connecting piece is arranged in the medium chamber, the first end of the high-pressure connecting piece is adjacent to the crown part of the high-pressure piston, an intermediate channel is axially formed in the high-pressure connecting piece in a penetrating mode, and the intermediate channel is communicated with the high-pressure channel of the high-pressure piston.

Wherein, the second pressure regulating assembly comprises a low pressure piston, a first low pressure elastic element, a low pressure airtight piece, a pressure regulating assembly and a second low pressure elastic element, the low pressure piston is arranged in the low pressure piston chamber and adjacent to the high pressure connecting piece, the low pressure piston is provided with a crown part and a piston rod, an axially arranged low pressure channel is formed in the low pressure piston, the low pressure channel is selectively communicated with a medium channel of the high pressure connecting piece, at least one through hole is formed in the side edge of the piston rod in a radial direction in a penetrating way, the first low pressure elastic element is arranged in the low pressure piston chamber, sleeved outside the piston rod of the low pressure piston and clamped between the crown part of the low pressure piston and the high pressure connecting piece, the low pressure airtight piece is abutted against the tail end of the piston rod of the low pressure piston and selectively seals the communication state between the low pressure channel and the medium channel, the pressure regulating assembly is arranged in the low-pressure chamber and extends out of the top end of the outer tube, the second low-pressure elastic element is clamped between the pressure regulating assembly and the crown of the low-pressure piston, and the adjustment of the pressure regulating assembly can change the compression amount of the second low-pressure elastic element.

The actuating member is rotatably abutted against the driven member, the second low-pressure elastic element is clamped between the driven member and the crown of the low-pressure piston, the actuating member and the driven member are provided with corresponding inclined surfaces, and when the actuating member rotates corresponding to the driven member, the inclined surfaces of the actuating member push the driven member to axially move the driven member.

In another aspect, the present invention also provides a gas storage device having the pressure regulating device, wherein the pressure regulating device is installed in a gas storage unit, a portion of the valve tube assembly is inserted into the gas storage unit, the high-pressure piston chamber is relatively located in the gas storage unit, and the high-pressure piston chamber is communicated with the outside of the gas storage unit through the high-pressure exhaust channel.

The valve pipe assembly comprises an outer pipe, a first inner pipe and a second inner pipe, the first inner pipe and the second inner pipe are inserted into the gas storage unit, and part of the outer pipe is inserted into the gas storage unit; the air inlet and the air outlet are radially arranged on the outer pipe, the high-pressure piston chamber, the medium chamber and the low-pressure chamber are axially arranged in the outer pipe, the high-pressure exhaust channel is arranged in the outer pipe and provided with an axial section and a radial section, the axial section of the high-pressure exhaust channel axially penetrates through the outer pipe, the radial section of the high-pressure exhaust channel is communicated with the high-pressure piston chamber, radially penetrates through the outer pipe and is communicated with the outside of the air storage unit, and the first inner pipe is sleeved at the tail end of the outer pipe; the first inner tube is internally provided with a containing chamber which axially penetrates through the first inner tube, and the containing chamber is communicated with the high-pressure exhaust channel; the second inner tube penetrates through the first inner tube, the high-pressure piston chamber axially penetrates through the second inner tube, an elongated slot is formed in the outer wall surface of the second inner tube in an inwards concave mode, a high-pressure exhaust hole radially penetrating through the second inner tube is formed in the elongated slot, the high-pressure exhaust hole is communicated with the high-pressure piston chamber, the high-pressure piston chamber is communicated with the accommodating chamber of the first inner tube through the high-pressure exhaust hole, and the high-pressure piston chamber is further communicated with the high-pressure exhaust channel of the outer tube through the accommodating chamber.

The valve tube assembly comprises an outer tube and an inner tube, the inner tube is sleeved on the outer tube, part of the outer tube is inserted into the air storage unit, the inner tube is inserted into the air storage unit, the air inlet hole, the high-pressure piston chamber and the medium chamber are sequentially and axially arranged in the inner tube, the air inlet hole is arranged at the bottom end of the inner tube, the low-pressure piston chamber and the low-pressure chamber are arranged in the outer tube and correspond to the top end of the inner tube, the air outlet hole radially penetrates through the outer tube and is communicated with the air storage unit, the high-pressure exhaust channel is provided with a radial section and an axial outlet, the radial section is communicated with the high-pressure piston chamber, and the axial outlet penetrates through the outer tube and is communicated with the outside of the air storage unit.

The invention has the advantages that the volume of the whole gas storage device is reduced by arranging part of the valve pipe assembly in the gas storage unit, the high-pressure piston chamber is communicated with the outside of the gas storage unit through the high-pressure exhaust channel to maintain enough air in the high-pressure piston chamber to ensure the normal operation of the high-pressure elastic element, thereby achieving the effects of reducing the volume and maintaining the normal pressure regulating function, and moreover, the safety of the whole use can be improved by reducing the pressure of the high-pressure gas to the required pressure value by sections through the arrangement of the first pressure regulating assembly and the second pressure regulating assembly.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a perspective view of a pressure regulating device of the present invention;

FIG. 2 is a perspective view of another perspective view of the pressure regulating device of the present invention;

FIG. 3 is an end view of the pressure regulating device of the present invention;

FIG. 4 is an exploded view of a portion of the pressure regulator assembly of the present invention;

FIG. 5 is a perspective view of the outer tube of the pressure regulating device of the present invention;

FIGS. 6A-6E are different angle side views of the outer tube of the pressure regulating device of the present invention;

FIG. 7 is a first side view cross-sectional operational view of the gas storage device of the present invention;

FIG. 8 is a perspective view of a second inner tube of the pressure regulating device of the present invention;

FIG. 9 is a second side view cross-sectional operational diagram of the gas storage apparatus of the present invention;

FIG. 10 is another partially exploded assembly view of the pressure regulator assembly of the present invention;

FIG. 11 is a third side sectional operational view of the gas storage device of the present invention;

FIG. 12 is a fourth side elevational view in cross-section of the gas storage device of the present invention;

FIG. 13 is a fifth side sectional operational view of the gas storage device of the present invention;

FIG. 14 is a sixth side sectional operational view of the gas storage apparatus of the present invention;

FIG. 15 is a seventh side sectional operational view of the gas storage device of the present invention;

FIG. 16 is a perspective cross-sectional view of a low pressure connector of the pressure regulator apparatus of the present invention;

FIG. 17 is an exploded view of yet another portion of the pressure regulating device of the present invention;

FIG. 18 is a seventh side sectional operational view of the gas storage device of the present invention;

FIG. 19 is a perspective view of a gas storage apparatus of the present invention;

FIG. 20 is a perspective view of another embodiment of the pressure regulating device of the present invention;

FIG. 21 is an exploded view of a portion of an assembly of another embodiment of the pressure regulating device of the present invention;

FIG. 22 is another partially exploded assembly view of another embodiment of the pressure regulating device of the present invention;

FIG. 23 is a first side sectional operational view of another embodiment of a gas storage device of the present invention;

FIG. 24 is a second side sectional operational view of another embodiment of the gas storage apparatus of the present invention;

FIG. 25 is a top view of another embodiment of an outer tube of the present invention;

FIG. 26 is a third side sectional operational view of another embodiment of the gas storage apparatus of the present invention;

FIG. 27 is a perspective cross-sectional view of another embodiment of the high pressure piston of the present invention;

FIG. 28 is a fourth side sectional operational view of another embodiment of a gas storage device in accordance with the present invention;

FIG. 29 is a perspective cross-sectional view of another embodiment of the low pressure piston of the present invention;

FIG. 30 is a fifth side sectional operational view of another embodiment of the gas storage apparatus of the present invention;

FIG. 31 is a sixth side sectional operational view of another embodiment of the gas storage apparatus of the present invention;

FIG. 32 is a perspective functional view of another embodiment of a gas storage device of the present invention;

FIG. 33 is another isometric action diagram of another embodiment of a gas storage device of the present invention;

fig. 34 is a seventh side sectional operational view of another embodiment of a gas storage device of the present invention.

Wherein, the reference numbers:

1: pressure regulating device 10: valve pipe assembly

11: outer tube 150: intermediate section

151 low pressure section 152 extended section

110 intermediate chamber 111 low pressure chamber

112 low pressure piston chamber 113 intake port

114, an air outlet 115 and an air inlet channel

116 detection hole 117 explosion-proof hole

118 explosion-proof channel 119 air release port

120 high pressure exhaust passage 121 low pressure exhaust passage

122 high pressure gauge 123 tapered section

124, pressure regulating hole 161 and end surface

162 middle boundary 163 shoulder pushing surface

13 first inner tube 131 accommodating chamber

14 second inner tube 141 high pressure piston chamber

142 long groove 143 high pressure vent hole

20: air inlet component 21: air inlet sleeve

211 central hole 22 air inlet plug

221 wide end 222 narrow end

30 first pressure regulating assembly 31 high pressure piston

311 crown 312 piston rod

313 high-voltage channel 32 high-voltage connecting piece

321 high-pressure channel 33 high-pressure regulating member

34 high-pressure elastic element 35 air-tight part

40 second pressure regulating assembly 41 Low pressure piston

411 crown 412 piston rod

413 low pressure channel 42 low pressure connection

421, through hole 422, end hole

43 low-pressure elastic element 44 plug body

45: plug 46: low pressure gauge

50: air outlet component 51: air outlet sleeve

511, central hole 512, inner convex rib

52 air outlet plug 521 ring shoulder

53 return spring 60 run-flat assembly

61 run-flat sleeve 611, perforation

62: air relief plug 63: air relief elastic element

70 explosion-proof assembly 90 gas storage unit

91 high voltage source 92 target device

921: connector 10A: valve tube assembly

101A, an air inlet hole 102A and a high-pressure piston chamber

103A medium chamber 104A low pressure piston chamber

105A, a low pressure chamber 106A, an air outlet

107A, a radial segment 108A, an axial outlet

109A step portion 11A outer tube

111A, a grip part 12A, an inner tube

121A, a containing groove 20A and an air inlet assembly

21A piercing unit 211A tip

212A, inner passage 30A, first pressure regulating assembly

31A high pressure piston 311A crown

312A piston rod 313A high pressure channel

314A, through hole 315A, groove

32A high-pressure elastic element 33A high-pressure airtight piece

34A high-voltage connector 341A intermediate channel

342A, a connecting groove 40A, a second pressure regulating unit

41A low pressure piston 411A crown

412A, piston rod 413A, low pressure passage

414A, through hole 415A, groove

42A first low-pressure elastic element 43A low-pressure air seal

44A, a pressure regulating component 441A and an actuating component

442A follower 45A second low-pressure elastic element

90A, gas storage unit 91A, drip bag

911A hose 92A hanging component

921A hook 922A ring

923A coating film 93A high-pressure gas source assembly

931A, a fixed frame 932A and a high-pressure gas cylinder

94A air leakage cover

Detailed Description

The present invention will be further described with reference to the drawings and the embodiments thereof, wherein the drawings are simplified for illustrative purposes only, and the structures and methods of the present invention will be described by describing the relationship between elements, so that the elements shown in the drawings are not necessarily in terms of actual number, actual shape, actual size, and actual proportions, but rather have been enlarged or simplified to provide a better illustration, and the actual number, actual shape, or actual size proportions may be selectively designed and arranged, and the detailed layout of the elements may be more complex.

Referring to fig. 1 to 4, the pressure regulating device 1 of the present invention includes a valve tube assembly 10, an air inlet assembly 20, a first pressure regulating assembly 30, a second pressure regulating assembly 40, and an air outlet assembly 50.

Referring to fig. 4, the valve tube assembly 10 includes an outer tube 11, a first inner tube 13 and a second inner tube 14.

Referring to fig. 5 and fig. 6A to 6E, the outer tube 11 has an axial passage, and the axial passage sequentially includes an intermediate chamber 110, a low pressure chamber 111 and a low pressure piston chamber 112, and in one embodiment, the outer tube 11 includes an intermediate section 150, a low pressure section 151 and an extension section 152 connected to each other, and the outer diameter of the intermediate section 150 gradually widens from the intermediate section 150 to the extension section 152 to form a stepped end surface 161, a middle interface 162 and a shoulder surface 163, the end surface 161 is located at the end of the intermediate section 150, the intermediate chamber 110 is located in the intermediate section 150 and the low pressure section 151, and the low pressure chamber 111 and the low pressure piston chamber 112 are located in the extension section 152. The outer tube 11 has an air inlet hole 113 and an air outlet hole 114 arranged radially. The air inlet 113 is communicated with an air inlet channel 115, the air inlet channel 115 is axially disposed in the outer tube 11, one end of the air inlet channel 115 opens through the middle joint 162, the other end of the air inlet channel 115 opens to communicate with the air inlet 113, in one embodiment, a detection hole 116 and an explosion-proof hole 117 are radially disposed beside the air inlet 113, the detection hole 116 is communicated with the air inlet 113 through the air inlet channel 115, and the explosion-proof hole 117 is communicated with the air inlet 113 through an explosion-proof channel 118. The air outlet 114 is connected to the low pressure chamber 111, and in one embodiment, the outer tube 11 has a radially disposed air release port 119, and the air release port 119 is connected to the low pressure chamber 111. The outer tube 11 is provided with a high pressure exhaust channel 120, an opening at one end of the high pressure exhaust channel 120 axially penetrates the end surface 161, an opening at the other end of the high pressure exhaust channel 120 radially penetrates the extending section 152, and when the air storage unit 90 is connected, an end of the high pressure exhaust channel 120 radially penetrating the extending section 152 is located outside the air storage unit 90. The outer tube 11 is further provided with a low pressure exhaust passage 121, and the low pressure exhaust passage 121 radially penetrates the outer tube 11 and communicates with the low pressure piston chamber 112.

Referring to fig. 4 and 7, the first inner tube 13 is sleeved at the end of the outer tube 11, the first inner tube 13 has a chamber 131 axially penetrating therethrough, the chamber 131 is communicated with the high-pressure exhaust passage 120, and in an embodiment, the first inner tube 13 is sleeved outside the intermediate section 150 of the outer tube 11.

Referring to fig. 4 and fig. 7 to 9, the second inner tube 14 is inserted into the first inner tube 13, the second inner tube 14 has an axially-penetrating high-pressure piston chamber 141, an outer wall surface of the second inner tube 14 is recessed to form a long groove 142, the long groove 142 has a high-pressure exhaust hole 143 radially penetrating the second inner tube 14, the high-pressure exhaust hole 143 is communicated with the high-pressure piston chamber 141, the high-pressure piston chamber 141 is communicated with the accommodating chamber 131 of the first inner tube 13 through the high-pressure exhaust hole 143, and the high-pressure piston chamber 141 is further communicated with the high-pressure exhaust channel 120 of the outer tube 11 through the accommodating chamber 131.

Referring to fig. 2, fig. 6B and fig. 10, the air intake assembly 20 is disposed in the air intake hole 113 of the outer tube 11, the air intake assembly 20 normally closes the air intake hole 113, and when a high pressure source is connected to the air intake assembly 20, the high pressure source injects high pressure gas into the air intake channel 115 through the air intake assembly 20. In one embodiment, the intake assembly 20 includes an intake sleeve 21 and an intake plug 22, the intake sleeve 21 is disposed through the intake hole 113 and has a central hole 211, the intake plug 22 has a wide end 221 and a narrow end 222, and the narrow end 222 of the intake plug 22 corresponds to the central hole 211 of the intake sleeve 21.

When the high pressure source is not applied (as shown in fig. 11), the gas pressure in the gas storage unit 90 pushes the air inlet plug 22 through the air inlet channel 115, so that the narrow end 222 of the air inlet plug 22 is plugged into the central hole 211 of the air inlet sleeve 21, and the wide end 221 of the air inlet plug 22 closes the central hole 211 of the air inlet sleeve 21, and at this time, the gas in the gas storage unit 90 will not leak out through the air inlet assembly 20; when the high pressure source 91 is connected (as shown in fig. 12), the gas pressure in the high pressure source 91 pushes the inlet plug 22 away to form a channel, so that the high pressure gas can enter the inlet channel 115 from the high pressure source 91 through the central hole 211 of the inlet sleeve 21 and then be filled into the gas storage unit 90 for storage.

Referring to fig. 4 and 9, the first pressure regulating assembly 30 is disposed in the first inner tube 13 and the second inner tube 14, and the first pressure regulating assembly 30 includes a high pressure piston 31, a high pressure connector 32, a high pressure regulating member 33, a high pressure elastic element 34, and an airtight member 35. The high-pressure piston 31 is disposed in the high-pressure piston chamber 141 of the second inner tube 14, the high-pressure piston 31 has a crown 311 and a piston rod 312, a high-pressure passage 313 axially penetrates through the high-pressure piston 31, one end of the high-pressure connecting member 32 is disposed through the intermediate chamber 110 of the outer tube 11, the other end of the high-pressure connecting member 32 is disposed through the first inner tube 13 and the second inner tube 14, a high-pressure passage 321 axially penetrates through the high-pressure connecting member 32, the high-pressure adjusting member 33 is disposed through the high-pressure piston chamber 141 of the second inner tube 14 and sleeved outside the piston rod 312, the high-pressure elastic member 34 is sleeved outside the piston rod 312 of the high-pressure piston 31, the high-pressure elastic member 34 is clamped between the crown 311 of the high-pressure piston 31 and the high-pressure adjusting member 33, the airtight member 35 is plugged in the end of the second inner tube 14, the airtight member 35 abuts against the end of the piston rod 312 of the high-pressure piston 31, for selectively closing the high pressure passage 313 of the high pressure piston 31.

Referring to fig. 9, in a normal state, the elastic force of the high pressure elastic element 34 pushes the high pressure piston 31 upward, so that the end of the piston rod 312 of the high pressure piston 31 is separated from the surface of the airtight member 35, and the high pressure gas in the gas storage unit 90 can enter the high pressure passage 313 of the high pressure piston 31 and the high pressure passage 321 of the high pressure connector 32, and then flow into the intermediate chamber 110 of the outer tube 11. Referring to fig. 13, when the gas pressure of the gas entering the intermediate chamber 110 reaches the predetermined value, the gas pressure in the intermediate chamber 110 is sufficient to resist the elastic force of the high-pressure elastic element 34, and the high-pressure piston 31 is pushed downward until the end of the piston rod 312 abuts against the surface of the airtight member 35, so as to prevent the high-pressure gas from flowing into the high-pressure passage 313 of the high-pressure piston 31. Specifically, when the high pressure piston 31 moves in the high pressure piston chamber 141, the gas required for the compression stroke to be discharged or supplied into the high pressure piston chamber 141 is communicated with the outside of the gas storage unit 90 through the high pressure gas discharge hole 143 of the second inner tube 14, the long groove 142 and the high pressure gas discharge passage 120 of the outer tube 11.

Adjusting the position of the high pressure adjusting member 33 can set a predetermined gas pressure value required in the intermediate chamber 110, and when the high pressure adjusting member 33 is further away from the intermediate chamber 110 (as shown in fig. 9), the amount of the high pressure elastic element 34 that is pre-compressed is smaller, and the gas pressure in the intermediate chamber 110 reaches a smaller pressure value at this time, so that the high pressure piston 31 can be pushed back to abut against the airtight member 35; as the high pressure adjustment member 33 is disposed toward the intermediate chamber 110 (as shown in fig. 14), the higher the amount of pre-compression of the high pressure elastic element 34, the higher the pressure of the gas in the intermediate chamber 110, so as to push the high pressure piston 31 back against the gas-tight member 35.

Referring to fig. 9, 10 and 16, the second pressure regulating assembly 40 is disposed in the low pressure section 151 of the outer tube 11, and the second pressure regulating assembly 40 includes a low pressure piston 41, a low pressure connector 42, a low pressure elastic element 43, a plug 44 and a plug 45. The low pressure piston 41 is disposed in the low pressure piston chamber 112 of the outer tube 11, the low pressure piston 41 has a crown 411 and a piston rod 412, the low pressure connecting piece 42 is disposed through the low pressure chamber 111 and the low pressure piston chamber 112, the low pressure elastic element 43 is sleeved outside the piston rod 412 of the low pressure piston 41 and clamped between the crown 411 of the low pressure piston 41 and the low pressure connecting piece 42, the plug 44 is disposed in the intermediate chamber 110 of the outer tube 11 and fixed to the low pressure connecting piece 42, the plug 44 selectively seals the communication between the intermediate chamber 110 and the low pressure chamber 111, in one embodiment, the intermediate chamber 110 has a tapered section 123, the inner diameter of the tapered section 123 is tapered, the inner diameter of the tapered section 123 is wider at the end closer to the high pressure piston chamber 141 and narrower at the end closer to the low pressure chamber 111, the plug 44 is a tapered body, the outer diameter of the plug 44 is wider at the end toward the high pressure piston chamber 141, and the plug body 44 has a narrower outer diameter toward the low pressure chamber 111. The latch 45 is inserted into the end hole 421 of the low-pressure connecting member 42 and selectively abuts against the surface of the plug body 44. In a normal state, referring to fig. 16, when gas is present in the intermediate chamber 110 and the low-pressure piston 41 is not yet screwed in, the gas in the intermediate chamber 110 pushes the plug 44, so that the wider outer diameter of the plug 44 is plugged into the narrower inner diameter of the tapered section 123 of the intermediate chamber 110 to close the communication state between the intermediate chamber 110 and the low-pressure chamber 111.

As shown in fig. 9, when the low pressure piston 41 is screwed in, the low pressure piston 41 compresses the low pressure elastic element 43, so that the elastic force of the low pressure elastic element 43 pushes the low pressure connector 42 and the pin 45 downward, and the pin 45 pushes the plug 44, so that the narrower outer diameter of the plug 44 enters the wider inner diameter of the tapered section 123, and a gap for allowing gas to pass through is formed between the plug 44 and the pipe wall of the intermediate chamber 110, so that the gas in the intermediate chamber 110 can enter the low pressure chamber 111. In particular, when the low pressure piston 41 moves in the low pressure piston chamber 112, the gas required for the compression stroke to be discharged or supplemented into the low pressure piston chamber 112 communicates the low pressure piston chamber 112 with the outside through the low pressure discharge passage 121 (shown in fig. 5) of the outer tube 11.

Adjusting the position of the low pressure piston 41 can set a predetermined gas pressure value required in the low pressure chamber 111, and when the crown 411 of the low pressure piston 41 is farther away from the low pressure chamber 111 (as shown in fig. 9), the amount of the pre-compression of the low pressure elastic element 43 is smaller, the gas pressure in the low pressure chamber 111 reaches a smaller pressure value, and the low pressure piston 41 can be pushed upward, so that the blocking body 44 blocks the communication state between the intermediate chamber 110 and the low pressure chamber 111; when the crown 411 of the low pressure piston 41 is disposed closer to the low pressure chamber 111 (as shown in fig. 14), the amount of the pre-compression of the low pressure elastic element 43 is larger, and the gas pressure of the low pressure chamber 111 has to reach a larger pressure value to push the low pressure piston 41 upward, so that the blocking body 44 blocks the communication state between the intermediate chamber 110 and the low pressure chamber 111.

Referring to fig. 9 and 17, the gas outlet element 50 is disposed in the gas outlet hole 114 of the outer tube 11, the gas outlet hole 114 is normally closed by the gas outlet element 50, and when a target device (such as an air gun, a pneumatic tool, etc.) needing to use pressurized gas is connected to the gas outlet element 50, the target device opens the gas outlet element 50, so that the gas in the low pressure chamber 111 flows into the target device through the gas outlet hole 114. In one embodiment, the air outlet assembly 50 includes an air outlet sleeve 51 and an air outlet plug 52, the air outlet sleeve 51 is disposed through the air outlet hole 114 and has a central hole 511, an inner rib 512 is formed in the central hole 511 in a radially extending manner, in one embodiment, the air outlet sleeve 51 can be divided into two segments, and the air outlet plug 52 has an annular shoulder 521 formed in a radially extending manner.

When a target device is not connected (as shown in fig. 9), the gas pressure in the low pressure chamber 111 pushes the gas plug 52, so that the annular shoulder 521 of the gas plug 52 abuts against the inner protruding rib 512 of the gas outlet sleeve 51, and the annular shoulder 521 of the gas plug 52 and the inner protruding rib 512 of the gas outlet sleeve 51 close the central hole 511 of the gas outlet sleeve 51, so that the gas in the gas storage unit 90 will not leak out through the gas outlet element 50, in one embodiment, a return spring 53 is disposed in the gas outlet sleeve 51 and pushes the annular shoulder 521 of the gas plug 52 to move toward the inner protruding rib 512 of the gas outlet sleeve 51, so as to ensure that the annular shoulder 521 of the gas plug 52 can reliably abut against the inner protruding rib 512 of the gas outlet sleeve 51, and effectively close the central hole 511 of the gas outlet sleeve 51; when the target device 92 is attached (as shown in fig. 18), the joint 921 of the target device 92 pushes the air outlet plug 52 away, so that the annular shoulder 521 of the air outlet plug 52 is away from the inner convex rib 512 of the air outlet sleeve 51 to form a channel, so that air can enter the target device 92 from the low-pressure chamber 111 through the air outlet hole 114 and the central hole 511 of the air outlet sleeve 51, and then be used by the target device 92.

Referring to fig. 1, 6C and 10, in an embodiment, a high pressure gauge 122 may be installed in the detection hole 116, and since the detection hole 116 is communicated with the air inlet 113 through the air inlet channel 115, the high pressure gauge 122 may detect the gas pressure in the air storage unit 90 through the detection hole 116 and the air inlet channel 115, so that a user may know the current gas pressure in the air storage unit 90 through the high pressure gauge 122.

Referring to fig. 3, 9, 10 and 16, in an embodiment, a through hole 421 is axially formed through the low pressure connector 42, a low pressure passage 413 is axially formed through the low pressure piston 41, the through hole 421 connects the low pressure passage 413 with the low pressure chamber 111, an opening at one end of the low pressure passage 413 is connected to the through hole 421 of the low pressure connector 42, an opening at the other end of the low pressure passage 413 is connected to a low pressure gauge 46, and since the low pressure passage 413 is connected to the low pressure chamber 111 through the through hole 421, the low pressure gauge 46 can detect the gas pressure in the low pressure chamber 111 through the low pressure passage 413, so that a user can know the current gas pressure in the low pressure chamber 11, that is, the gas pressure input into the target device 92 through the low pressure gauge 46. Since the low pressure gauge 46 is axially disposed at the top end of the pressure regulating device, it is convenient for a user to directly observe the output pressure value when using the pressure regulating device.

Referring to fig. 7 and 13, when the use is finished and the high-pressure gas in the intermediate chamber 110 and the low-pressure chamber 111 is to be discharged to maintain the overall preservation safety, the low-pressure piston 41 is rotated to withdraw from the outer tube 11, and in the process of withdrawing from the low-pressure piston 41, when the low-pressure piston 41 moves outwards, the force applied to the low-pressure spring 43 is reduced, so that the low-pressure connecting member 42 is slightly pushed upwards by the gas existing in the low-pressure chamber 111, the wall surface of the low-pressure connecting member 42 moves to the notch 125 of the outer tube 11, the notch 125 makes the wall surface of the low-pressure connecting member 42 not be attached to the inner wall surface of the outer tube 11, and the gas in the low-pressure chamber 111 flows into the low-pressure piston chamber 112 through the notch 125 and is discharged outwards through the low-pressure discharge passage 121 until the gas in the low-pressure chamber 111 is completely discharged. Similarly, the gas pressure in the low pressure chamber 111 can be adjusted by rotating the low pressure piston 41, for example, when the original gas pressure in the low pressure chamber 111 is 200psi but the currently required gas pressure is 150psi, the low pressure gauge 46 is rotated to move the wall of the low pressure connecting member 42 to the slot 125 of the outer tube 11, and then the gas is partially discharged first, so that the gas pressure in the low pressure chamber 111 can be adjusted to 150 psi.

Referring to fig. 1, 7 and 10, in one embodiment, a gas release element 60 is disposed in the gas release opening 119 of the outer tube 11 for slightly releasing the gas in the low pressure chamber 111 when the pressure of the gas in the low pressure chamber 111 exceeds a safe pressure value (e.g. 200psi), so as to maintain the pressure in the low pressure chamber 111 within a safe range. In one embodiment, the air-release assembly 60 has an air-release sleeve 61, an air-release plug 62 and an air-release elastic element 63, the air-release sleeve 61 is disposed through the air-release opening 119, the air-release sleeve 61 has a through hole 611 penetrating in the radial direction, the air-release plug 62 is disposed through the air-release sleeve 61, the air-release plug 62 selectively closes the communication state between the through hole 611 of the air-release sleeve 61 and the low-pressure chamber 111, and the air-release elastic element 63 is disposed between the air-release plug 62 and the inner end surface of the air-release sleeve 61, so as to push the air-release plug 62 to move toward the low-pressure chamber 111, and the air-release plug 62 is abutted against the flange of the tube wall between the low-pressure chamber 111 and the air-release opening 119. The preset safe air pressure value is determined by the selection of the air-release elastic element 63, and in a normal state, the air-release elastic element pushes the air-release plug 62 to move towards the low-pressure chamber 111, so that the air-release plug 62 closes the communication state between the through hole of the air-release sleeve 61 and the low-pressure chamber 111; when the gas pressure in the low pressure chamber 111 exceeds the safety pressure value, the gas pressure in the low pressure chamber 111 is sufficient to resist the elastic force of the gas-release elastic element 63, and the gas-release plug 62 is pushed, so that the gas-release plug 62 moves to pass through the through hole 611 of the gas-release sleeve 61, and the gas in the low pressure chamber 111 is allowed to slightly flow out of the through hole 611, so as to achieve the purpose of micro-adjustment of the gas pressure in the low pressure chamber 111.

Referring to fig. 2, fig. 6A and fig. 18, in one embodiment, an explosion-proof assembly 70 is disposed in the explosion-proof hole 117 of the outer tube 11 for maintaining the maximum internal air pressure within a safe range, so as to avoid the risk of damage or even explosion of the gas storage unit 90 or other components due to excessive internal air pressure. The explosion-proof hole 117 is communicated with the air inlet 113 through the explosion-proof channel 118, and the air inlet 113 is communicated with the air storage unit 90 through the air inlet channel 115, so when the air pressure in the air storage unit 90 reaches the default safety value of the explosion-proof assembly 70 (e.g. 5000psi), the explosion-proof assembly 70 will be instantaneously damaged to instantaneously communicate the explosion-proof hole 118 with the outside, and the air in the air storage unit 90 is instantaneously discharged through the explosion-proof hole 118, thereby effectively preventing the maximum air pressure value inside from exceeding the preset safety value, and further maintaining the use safety.

Further, the pressure regulating device 1 of the present invention is provided with an airtight ring at a suitable position to prevent an undesired air flow, which is only exemplified below but not limited thereto. An airtight ring is sleeved outside the high-pressure regulating member 33 to prevent the gas in the gas storage unit 90 from flowing into the high-pressure piston chamber 141; a gas-tight ring is fitted around the crown 311 of the high-pressure piston 31 to prevent the gas in the intermediate chamber 110 from flowing into the high-pressure piston chamber 141; a gas-tight ring is sleeved at the joint of the outer tube 11 and the gas storage unit 90 to prevent high-pressure gas from flowing out of the joint; a gas-tight ring is provided around the low-pressure connector 42 to prevent gas from the low-pressure chamber 111 from flowing into the low-pressure piston chamber 112.

Further, the high-pressure elastic element 34 and the low-pressure elastic element 43 may be various suitable elastic components, such as a spring, a thin elastic sheet, and the like, but not limited thereto.

In general, referring to fig. 1 and 19, a user assembles the pressure regulating assembly 1 on the gas storage unit 90 to form a gas storage device, a portion of the outer tube 11, the first inner tube 13 and the second inner tube 14 are inserted into the gas storage unit 90, a portion of the outer tube 11 is exposed outside the gas storage unit 90, and particularly, an opening of one end of the high pressure exhaust channel 120 of the outer tube 11 is exposed outside the gas storage unit 90. When high-pressure gas is to be filled (as shown in fig. 12), the high-pressure source 91 is connected to the gas inlet assembly 20, and the gas in the high-pressure source 91 is filled into the gas storage unit 90 through the gas inlet assembly 20 for storage. The high-pressure gas in the gas storage unit 90 is adjusted to a desired gas pressure value in the low-pressure chamber 111 after the action of the first pressure regulating assembly 30 and the second pressure regulating assembly 40 (as shown in fig. 9), for example, the high-pressure gas in the gas storage unit 90 is 2000psi, the gas pressure value is adjusted to 500psi by the first pressure regulating assembly 30, and the gas pressure value is adjusted to 150psi by the second pressure regulating assembly 40 for use, and the problem of failure or assembly damage possibly caused by single-stage pressure regulation can also be reduced by two-stage pressure regulation. When the target device 92 is to be connected to the gas outlet element 50 for use (as shown in fig. 18), the target device 92 is connected to the gas outlet element 50, so that the gas depressurized to the desired pressure in the low-pressure chamber 111 can flow into the target device 92 through the gas outlet element 50 for use.

The volume of the pressure adjusting device 1 combined with the gas storage unit 90 is reduced by the arrangement of inserting the first inner tube 13 and the second inner tube 14 into the gas storage unit 90, in order to make the high-pressure piston chamber 141 embedded in the gas storage unit 90 still work normally, when the high-pressure piston 31 moves axially in the high-pressure piston chamber 141, the gas needs to be discharged after being compressed and the gas needs to be supplemented after being expanded, but the high-pressure piston chamber 141 cannot be directly communicated with the inside of the gas storage unit 90 through the opening of the second inner tube 14, the whole operation is failed or even damaged because the high-pressure gas in the gas storage unit 90 is introduced into the high-pressure piston chamber 141, so the invention adopts the structural matching between the second inner tube 14 and the outer tube 11, so that the high-pressure piston chamber 141 can be communicated with the outside of the gas storage unit 90 through the high-pressure exhaust channel 120, and the high-pressure piston chamber 141 is discharged to the outside atmosphere or the outside atmosphere is supplemented with the required gas through the high-pressure exhaust channel 120, so as to maintain the normal operation of the high pressure piston 31 and avoid the failure of the high pressure elastic element 34 caused by the vacuum state formed by the insufficient air in the high pressure piston chamber 141.

Referring to fig. 20 to 22, in another embodiment of the present invention, the pressure regulating device 1A includes a valve tube assembly 10A, an air inlet assembly 20A, a first pressure regulating assembly 30A, and a second pressure regulating assembly 40A.

Referring to fig. 21 to 25, the valve tube assembly 10A has an axial passage, which sequentially includes an air inlet hole 101A, a high pressure piston chamber 102A, an intermediate chamber 103A, a low pressure piston chamber 104A, a low pressure chamber and an air outlet hole 106A, wherein the air inlet hole 101A is selectively communicated with the intermediate chamber 103A, the intermediate chamber 103A is selectively communicated with the low pressure chamber 105A, and the air outlet hole 106A is communicated with the low pressure chamber 105A. In one embodiment, the valve tube assembly 10A includes an outer tube 11A and an inner tube 12A, the inner tube 12A is sleeved on the outer tube 11A, the air inlet hole 101A, the high pressure piston chamber 102A and the intermediate chamber 103A are sequentially and axially disposed in the inner tube 12A, the air inlet hole 101A is disposed at the bottom end of the inner tube 12A, the low pressure piston chamber 104A and the low pressure chamber 105A are disposed in the outer tube 11A and correspond to the top end of the inner tube 12A, and the air outlet hole 106A radially penetrates through the outer tube 11A. The valve tube assembly 10A includes a high pressure exhaust passage communicating the high pressure piston chamber 102A with the exterior of the valve tube assembly 10A, the high pressure exhaust passage having a radial segment 107A and an axial outlet 108A, the radial segment 107A communicating with the high pressure piston chamber 102A, the axial outlet 108A penetrating the valve tube assembly 10A, such that the high pressure piston chamber 102A communicates with the exterior of the valve tube assembly 10A through the high pressure exhaust passage. In one embodiment, a holding portion 111A is formed at the top end of the outer tube 10A in a radially extending manner, so that a user can rotate the outer tube 10A by holding the holding portion 111A.

Referring to fig. 22 and 23, the air intake assembly 20A is disposed in the valve tube assembly 10A and connected to the air intake hole 101A. In one embodiment, the bottom end of the inner tube 12A is recessed to form a receiving groove 121A, the receiving groove 121A is communicated with the air inlet 101A, the air inlet assembly 20A is disposed in the receiving groove 121A and includes a puncturing unit 21A, the puncturing unit 21A is hollow and has a tip 211A and an inner channel 212A, and two ends of the inner channel 212A have openings and are communicated with the air inlet 101A. Referring to fig. 26, when the tip 211A pierces a high pressure gas cylinder 91A, the gas in the high pressure gas cylinder 91A flows into the inner passage 212A of the piercing unit 21A to further flow into the gas inlet hole 101A.

Referring to fig. 22, 23 and 27, the first pressure regulating assembly 30A is disposed in the high pressure piston chamber 102A of the valve tube assembly 10A and the intermediate chamber 103A, and depressurizes the gas passing through the first pressure regulating assembly 30A and introduces the gas into the intermediate chamber 103A. In one embodiment, the first pressure regulating assembly 30A includes a high pressure piston 31A, a high pressure elastic element 32A, a high pressure air seal 33A and a high pressure connector 34A. The high pressure piston 31A is disposed in the high pressure piston chamber 102A of the inner tube 12A, the high pressure piston chamber 102A has a step portion 109A, the high pressure piston 31A has a crown portion 311A and a piston rod 312A, an axially disposed high pressure channel 313A is formed in the high pressure piston 31A, the high pressure channel 313A is selectively communicated with the air inlet hole 101A, and at least one through hole 314A is radially formed through a side edge of the piston rod 312A, so that air enters the high pressure channel 313A through the through hole 314A. The high-pressure elastic element 32A is sleeved outside the piston rod 312A and clamped between the crown 311A of the high-pressure piston 31A and the step 109A of the high-pressure piston chamber 102A. The high-pressure air seal 33A abuts against the end of the piston rod 312A of the high-pressure piston 31A and selectively closes the communication state between the high-pressure passage 313A and the air intake hole 101A, in an embodiment, a groove 315A is concavely formed at the end of the piston rod 312A of the high-pressure piston 31A, and the high-pressure air seal 33A is plugged in the groove 315A. The high pressure connecting piece 34A is disposed in the intermediate chamber 103A, a first end of the high pressure connecting piece 34A is adjacent to the crown 311A of the high pressure piston 31A, an intermediate passage 341A axially penetrates the high pressure connecting piece 34A, the intermediate passage 341A is communicated with the high pressure passage 313A of the high pressure piston 31A, and a connecting groove 342A is concavely formed at a second end of the high pressure connecting piece 34A.

Referring to fig. 23, in a normal state, the high pressure air seal 33A abuts against the end of the piston rod 312A of the high pressure piston 31A and seals the communication state between the high pressure passage 313A and the air intake hole 101A. Referring to fig. 26, when the high pressure gas passes through the gas inlet hole 101A, the high pressure gas pushes the high pressure gas seal 33A, and further pushes the high pressure piston 31A to move axially, so that the high pressure gas seal 331A is far away from the gas inlet hole 101A of the valve tube assembly 10A, and the high pressure gas can enter the through hole 314A of the high pressure piston 31A, enter the high pressure channel 313A, and finally enter the medium channel 341A. Referring to fig. 28, when the high pressure gas entering the intermediate passage 341A reaches a predetermined value, such that the gas pressure of the high pressure gas therein exceeds the gas pressure provided by the high pressure elastic element 32A plus the gas entering the gas inlet hole 101A, the high pressure piston 31A is pushed back by the high pressure gas, and the high pressure gas sealing member 33A closes the gas inlet hole 101A again, until the gas pressure in the intermediate chamber 103A is reduced, and the elastic restoring force of the high pressure elastic element 32A plus the gas pressure provided by the gas entering the gas inlet hole 101A is sufficient to resist the gas pressure in the intermediate chamber 103A, the high pressure elastic element 32A pushes the high pressure piston 31A to the state shown in fig. 26, such that the high pressure gas passes through the high pressure passage 313A again and enters the intermediate chamber 103A. Therefore, by means of the elastic coefficient of the high-pressure elastic element 32A, the pressure value of the gas allowed to pass through the high-pressure channel 313A can be set, so as to achieve the effect of regulating and reducing the gas pressure in the first stage.

Referring to fig. 22, 23 and 29, the second pressure regulating assembly 40A is disposed in the low pressure piston chamber 104A and the low pressure chamber 105A of the valve tube assembly 10A for selectively communicating the intermediate chamber 103A with the low pressure chamber 105A. In one embodiment, the second pressure regulating assembly 40A includes a low pressure piston 41A, a first low pressure elastic member 42A, a low pressure air seal 43A, a pressure regulating assembly 44A, and a second low pressure elastic member 45A. The low pressure piston 41A is disposed in the low pressure piston chamber 104A and adjacent to the high pressure connecting part 34A, in one embodiment, the low pressure piston 41A has a crown 411A and a piston rod 412A, an axially disposed low pressure passage 413A is formed in the low pressure piston 41A, the low pressure passage 413A is selectively communicated with the intermediate passage 341A of the high pressure connecting part 34A, at least one through hole 414A is radially formed through a side of the piston rod 412A, so that gas enters the low pressure passage 413A through the through hole 414A, in one embodiment, the piston rod 412A of the low pressure piston 41A is inserted into the connecting groove 342A of the high pressure connecting part 34A. The first low-pressure resilient element 42A is disposed in the low-pressure piston chamber 104A, sleeved outside the piston rod 412A of the low-pressure piston 41A, and clamped between the crown 411A of the low-pressure piston 41A and the high-pressure connecting part 34A, and in one embodiment, a cushion 46A is disposed between the high-pressure connecting part 34A and the first low-pressure resilient element 42A. The low pressure air seal 43A abuts against the end of the piston rod 412A of the low pressure piston 41A and selectively seals the communication state between the low pressure passage 413A and the intermediate passage 341A, in an embodiment, the end of the piston rod 412A of the low pressure piston 41A is concavely formed with a groove 415A, and the low pressure air seal 43A is plugged in the groove 415A. The pressure adjusting assembly 44A is disposed in the low pressure chamber 105A and extends out of the top end of the outer tube 11A, the second low pressure elastic element 45A is clamped between the pressure adjusting assembly 44A and the crown 411A of the low pressure piston 41A, and the adjustment of the pressure adjusting assembly 44A can change the compression amount of the second low pressure elastic element 45A, so that the elastic restoring force pre-stored in the second low pressure elastic element 45A is changed to affect the actuation of the low pressure piston 41A, and further affect the gas pressure in the low pressure chamber 105A.

In an embodiment, referring to fig. 22, 23 and 30, the pressure regulating assembly 44A includes an actuating member 441A and a driven member 442A, the actuating member 441A rotatably abuts against the driven member 442A, the second low-pressure elastic element 45A is clamped between the driven member 442A and the crown 411A of the low-pressure piston 41A, a corresponding inclined surface is provided between the actuating member 441A and the driven member 442A, when the actuating member 441A rotates corresponding to the driven member 442A, the inclined surface of the actuating member 441A pushes the driven member 442A to axially move the driven member 442A, thereby changing the compression amount of the second low-pressure elastic element 45A. In one embodiment, the corresponding slopes of the actuating member 441A and the driven member 442A are provided with a plurality of teeth for engagement. As shown in fig. 23, when the second low-pressure elastic element 45A is compressed by a larger amount, the low-pressure piston 41 is forced by the second low-pressure elastic element 45A, so that the gas pressure from the intermediate passage 341A needs to be larger to push the low-pressure gas seal 43A open, and therefore the gas input into the low-pressure chamber 105A has a larger pressure, which is suitable for the case of requiring a larger gas pressure. As shown in fig. 30, when the second low-pressure elastic element 45A is compressed by a smaller amount, the low-pressure piston 41 is forced by a smaller force from the second low-pressure elastic element 45A, and the gas pressure from the intermediate passage 341A is smaller, so that the low-pressure gas sealing member 43A can be pushed open, and therefore, the gas input into the low-pressure chamber 105A has a smaller pressure, which is suitable for the case where a smaller gas pressure is required.

Referring to fig. 23, in a normal state, the low pressure air seal 43A abuts against the end of the piston rod 412A of the low pressure piston 41A and closes the communication state between the low pressure passage 413A and the intermediate chamber 103A. Referring to fig. 26, when the high pressure gas enters the intermediate chamber 103A, the high pressure gas pushes the low pressure airtight member 43A, and further pushes the low pressure piston 41A to move axially, so that the low pressure airtight member 43A is away from the opening of the intermediate passage 341A of the high pressure connector 34A, and the gas having undergone the first stage of depressurization can enter the through hole 414A of the low pressure piston 41A, then enter the low pressure passage 413A, and finally enter the low pressure chamber 105A. Referring to fig. 31, when the gas entering the low pressure chamber 105A reaches a predetermined pressure value, the pressure of the gas therein is added to the elastic restoring force of the second low pressure elastic element 45A, exceeding the pressure provided by the addition of the pressure of the gas in the first low pressure elastic element 42A and the intermediate passage 341A, the low-pressure piston 41A is now pushed back into position, again closing the communication between the low-pressure passage 413A and the intermediate chamber 103A by the low-pressure gas seal 43A, until after the gas pressure in the low-pressure chamber 105A has decreased, when the elastic restoring force of the first low-pressure elastic member 42A plus the gas pressure in the intermediate passage 341A is sufficient to resist the gas pressure in the low-pressure chamber 105A plus the elastic restoring force of the second low-pressure elastic member 45A, the first low-pressure resilient member 42A urges the low-pressure piston 41A to the state shown in fig 26, the first stage pressure-regulated gas is again passed through the intermediate passage 341A and into the low pressure chamber 105A. Therefore, by means of the elastic coefficient of the first low-pressure elastic element 42A and the amount of the second low-pressure elastic element 45A to be compressed, the pressure value of the gas allowed to pass through the intermediate passage 341A can be set, thereby achieving the effect of reducing the gas pressure in the second stage.

Further, the pressure adjusting device 1A of the present invention is provided with an airtight ring at a suitable position to prevent an undesired air flow, which is only an example and not a limitation. A gas-tight ring is sleeved outside the piston rod 312A of the high-pressure piston 31A to prevent gas from the gas inlet hole 101A from flowing into the high-pressure piston chamber 102A; a gas-tight ring is fitted around the crown 311A of the high-pressure piston 31A to prevent the gas in the intermediate chamber 103A from flowing into the high-pressure piston chamber 102A; the high-pressure connector 34A is externally sleeved with an airtight ring to prevent the gas in the intermediate chamber 103A from flowing into the gap between the high-pressure connector 34A and the inner tube 12A; the crown 411A and the piston rod 412A of the low-pressure piston 41A are each externally fitted with an airtight ring to prevent communication between the low-pressure piston chamber 104A and the intermediate chamber 103A and the low-pressure chamber 105A.

Further, the high-pressure elastic element 32A, the first low-pressure elastic element 42A and the second low-pressure elastic element 45A may be various suitable elastic components, such as a spring, a thin elastic sheet, and the like, but not limited thereto.

In general, referring to fig. 20, 21 and 32, a user assembles the pressure regulating assembly 1A on a gas storage unit 90A to form a gas storage device, the inner tube 12A is inserted into the gas storage unit 90A, a part of the outer tube 11A is also inserted into the gas storage unit 90A, another part of the outer tube 11A is exposed out of the gas storage unit 90A, and particularly, the axial outlet 108A of the high-pressure exhaust channel of the valve tube assembly 10A is exposed out of the gas storage unit 90A. The air storage unit 90A is attached to a side of a drip bag 91A, so that the air storage unit 90A and the drip bag 91A are attached to each other, a hanging assembly 92A can be disposed outside the pressure regulating assembly 1A, the hanging assembly 92A is sleeved outside the pressure regulating assembly 1A, and has a hook 921A for hanging the drip bag 91A thereon, and then can be attached to the air storage unit 90A, and a ring 922A can be provided for hanging the assembled pressure regulating assembly 1A, the air storage unit 90A and the drip bag 91A in a proper position, and a drip film 923A can be provided to surround the drip bag 91A to tighten the drip bag 91A and the air storage unit 90A. A high-pressure air source assembly 93A is connected to the air intake assembly 20A of the pressure regulating assembly 1A and disposed in the air storage unit 90A, the high-pressure air source assembly 93A includes a fixing frame 931A and a high-pressure air cylinder 932A, the fixing frame 931A is screwed to the outside of the bottom end of the outer tube 11A, and the high-pressure air cylinder 932A is fixed to the fixing frame 931A and is opposite to the puncturing unit 21A of the air intake assembly 20A. In the non-use state, as shown in fig. 23 and 33, the high pressure gas cylinder 932A is not yet in contact with the puncturing unit 21A, and no high pressure gas is yet filled into the valve tube assembly 10A, and no gas is left in the gas storage unit 90A and is relaxed, so that no pressure is applied to the drip bag 91A. Referring to fig. 26, 32 and 34, when the drip bag 91A is pressurized, the outer tube 11A is rotated by the holding portion 111A of the outer tube 11A, so that the outer tube 11A rotates relative to the fixing frame 931A, due to the mutual screwing between the two, when the two rotate relatively, the fixing frame 931A moves axially along with the screw thread, at this time, the high pressure gas cylinder 932A is driven to approach the puncturing unit 21A, and rotates continuously until the high pressure gas cylinder 932A is punctured by the tip 211A, so that the high pressure gas in the high pressure gas cylinder 932A enters the air inlet hole 101A of the valve tube assembly 10A through the inner channel 212A of the puncturing unit 21A, and after the action of the first pressure regulating assembly 30A and the second pressure regulating assembly 40A, the psi is reduced to the desired output gas pressure value in the low pressure chamber 105A, and then flows into the air storage unit 90A through the air outlet hole 106A, for example, the high pressure gas in the high pressure gas cylinder 932A is 900 to 1300, the air pressure value is regulated and reduced by the first pressure regulating component 30A, and finally, the air pressure value is regulated and reduced to 5-6 psi by the second pressure regulating component 40A, and then the air pressure value flows into the air storage unit 90A, so that the air pressure in the air storage unit 90A is controlled to be 5-6 psi, the drip bag 91A is squeezed by the air pressure, the solution in the drip bag 91A is squeezed out, the solution flows into the hose 911A, and then the solution is pumped into a human body.

When not in use, the gas in the gas storage unit 90A can be discharged through the gas release cover 94A.

According to the invention, the air storage unit 90A is used for pressurizing the drip bag 91A, so that the drip bag 91A does not need to be placed at a position higher than an injection needle (for example, hung on a drip stand) as in the conventional use, and the pressure is pressurized by utilizing the height difference, and the pressure regulating device 1A provided by the invention is matched with the air storage unit 90A, so that the function of pressurizing the solution pumped into the drip bag 91A at any position can be achieved. Therefore, the pressure regulating device 1A of the present invention, in cooperation with the gas storage unit 90A, allows the user to use the drip bag 91A even when the user moves or is not convenient to use the drip stand. Furthermore, the volume of the pressure adjusting device 1A combined with the gas storage unit 90A is reduced by inserting a part of the outer tube 11A and the inner tube 12A into the gas storage unit 90A, and in order to make the high-pressure piston chamber 102A embedded in the gas storage unit 90A still work normally, when the high-pressure piston 31A moves axially in the high-pressure piston chamber 102A, the gas needs to be discharged after being compressed and the gas needs to be supplied after being expanded, but the high-pressure piston chamber 102A cannot be directly communicated with the inside of the gas storage unit 90A through the opening of the inner tube 12A, and the whole operation is failed or even damaged because the high-pressure gas inside the gas storage unit 90A is introduced into the high-pressure piston chamber 102A, so the present invention uses the structural matching between the inner tube 12A and the outer tube 11A, so that the high-pressure piston chamber 102A can be communicated with the outside of the gas storage unit 90A through the high-pressure exhaust channel of the valve tube assembly 10A, and the high-pressure piston chamber 102A can be discharged into the outside atmosphere through the high-pressure exhaust channel or can be supplied with the required gas through the outside atmosphere The high-pressure piston 31A is maintained to normally operate, and the high-pressure piston chamber 102A is prevented from forming a vacuum state due to insufficient air, so that the high-pressure elastic element 32A fails.

Although the present invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A pressure regulating device, characterized in that it includes:

the first pressure regulating assembly is arranged in the high-pressure piston chamber and the medium chamber of the valve pipe assembly, and is used for reducing the pressure of the gas passing through the first pressure regulating assembly and then introducing the gas into the medium chamber;

2. The pressure regulating apparatus of claim 1, wherein the valve tube assembly comprises an outer tube, a first inner tube and a second inner tube; the air inlet and the air outlet are radially arranged on the outer pipe, the high-pressure piston chamber, the medium chamber and the low-pressure chamber are axially arranged in the outer pipe, the high-pressure exhaust channel is arranged in the outer pipe and provided with an axial section and a radial section, the axial section of the high-pressure exhaust channel axially penetrates through the outer pipe and is communicated with the high-pressure piston chamber, the radial section of the high-pressure exhaust channel radially penetrates through the outer pipe, and the first inner pipe is sleeved at the tail end of the outer pipe; the first inner tube is internally provided with a containing chamber which axially penetrates through the first inner tube, and the containing chamber is communicated with the high-pressure exhaust channel; the second inner tube penetrates through the first inner tube, the high-pressure piston chamber axially penetrates through the second inner tube, an elongated slot is formed in the outer wall surface of the second inner tube in an inwards concave mode, a high-pressure exhaust hole radially penetrating through the second inner tube is formed in the elongated slot, the high-pressure exhaust hole is communicated with the high-pressure piston chamber, the high-pressure piston chamber is communicated with the accommodating chamber of the first inner tube through the high-pressure exhaust hole, and the high-pressure piston chamber is further communicated with the high-pressure exhaust channel of the outer tube through the accommodating chamber.

3. The pressure regulating device of claim 2, wherein the first pressure regulating assembly is disposed in the first inner tube and the second inner tube, the first pressure regulating assembly comprises a high pressure piston, a high pressure connector, a high pressure regulating member, a high pressure elastic element and a sealing member; the high-pressure piston is arranged in the high-pressure piston chamber of the second inner tube, the high-pressure piston is provided with a crown part and a piston rod, and a high-pressure channel is axially formed in the high-pressure piston in a penetrating way; one end of the high-pressure connecting piece is arranged in the intermediate chamber of the outer pipe in a penetrating way, the other end of the high-pressure connecting piece is arranged in the first inner pipe and the second inner pipe in a penetrating way, and a high-pressure channel is formed in the high-pressure connecting piece in a penetrating way in the axial direction; the high-pressure regulating part is arranged in the high-pressure piston chamber of the second inner pipe in a penetrating way and sleeved outside the piston rod; the high-pressure elastic element is sleeved outside the piston rod of the high-pressure piston and clamped between the crown of the high-pressure piston and the high-pressure regulating piece; the airtight piece is arranged in the tail end of the second inner tube in a plugging mode, abuts against the tail end of a piston rod of the high-pressure piston and is used for selectively sealing a high-pressure channel of the high-pressure piston.

4. The pressure regulating device of claim 2, wherein the second pressure regulating assembly is disposed in the outer tube, the second pressure regulating assembly comprising a low pressure piston, a low pressure connector, a low pressure elastic element and a plug; the low-pressure piston is arranged in the low-pressure piston chamber of the outer tube and is provided with a crown part and a piston rod; the low-pressure connecting piece is arranged in the low-pressure chamber and the low-pressure piston chamber in a penetrating way; the low-pressure elastic element is sleeved outside the piston rod of the low-pressure piston and clamped between the crown part of the low-pressure piston and the low-pressure connecting piece; the plug body is arranged in the intermediate chamber of the outer pipe and is mutually fixed with the low-pressure connecting piece, and the plug body selectively seals the communication between the intermediate chamber and the low-pressure chamber.

5. The pressure regulating device of claim 4, wherein the intermediate chamber has a tapered section with a tapered inner diameter, the tapered section having a wider inner diameter at an end closer to the high pressure chamber and a narrower inner diameter at an end closer to the low pressure chamber, the plug body is a tapered body, the wider outer diameter of the plug body faces the high pressure chamber, and the narrower outer diameter of the plug body faces the low pressure chamber.

6. The pressure regulating apparatus according to claim 4 or 5, further comprising a low pressure gauge, wherein a through hole is formed through the low pressure connecting member in an axial direction, a low pressure passage is formed through the low pressure piston in an axial direction, the through hole communicates the low pressure passage with the low pressure chamber, an opening at one end of the low pressure passage communicates with the through hole of the low pressure connecting member, and an opening at the other end of the low pressure passage communicates with the low pressure gauge.

7. The pressure regulating device according to claim 2, wherein the air inlet assembly comprises an air inlet sleeve and an air inlet plug, the air inlet sleeve is disposed through the air inlet hole and has a central hole, the air inlet plug has a wide end and a narrow end, the narrow end of the air inlet plug corresponds to the central hole of the air inlet sleeve, and the wide end of the air inlet plug selectively closes the central hole of the air inlet sleeve.

8. The pressure regulating device according to claim 2, further comprising an air outlet assembly, wherein the air outlet assembly comprises an air outlet sleeve and an air outlet plug, the air outlet sleeve is disposed in the air outlet hole and has a central hole, an inner protruding rib is formed in the central hole in a radially extending manner, the air outlet plug has an annular shoulder portion formed in the radially extending manner, and the annular shoulder portion of the air outlet plug selectively abuts against the inner protruding rib of the air outlet sleeve.

9. The pressure regulating device as claimed in claim 2, further comprising a high pressure gauge, wherein the outer tube is radially provided with a detection hole, the detection hole is communicated with the air inlet hole through the air inlet passage, and the high pressure gauge is disposed in the detection hole.

10. The pressure regulating device according to claim 2, further comprising a venting assembly, wherein the outer tube is radially provided with a venting port, the venting port is communicated with the low pressure chamber, and the venting assembly is disposed in the venting port of the outer tube for venting the gas in the low pressure chamber in an amount when the pressure of the gas in the low pressure chamber exceeds a safe pressure value.

11. The pressure-regulating apparatus according to claim 10, wherein said venting assembly has a venting sleeve, a venting plug and a venting elastic member; this sleeve pipe of disappointing wears to locate in this disappointing mouth, this sleeve pipe of disappointing has a perforation that radially runs through, this disappointing stopper wears to locate in this sleeve pipe of disappointing, this disappointing stopper selectively seals the perforation of this sleeve pipe of disappointing and the intercommunication state of this low-pressure chamber, this elastic element that loses heart presss from both sides and locates between this disappointing stopper and this inner end face that loses heart, move towards the low-pressure chamber for the ejection air-release stopper, and make the air-release stopper support and lean on the pipe wall flange between low-pressure chamber and disappointing mouth.

12. The pressure regulating device of claim 2, further comprising an explosion-proof assembly, wherein the outer tube is radially provided with an explosion-proof hole, the explosion-proof hole is communicated with the air inlet hole through an explosion-proof channel, and the explosion-proof assembly is disposed in the explosion-proof hole.

13. The pressure regulating device of claim 1, wherein the valve tube assembly comprises an outer tube and an inner tube, the inner tube is sleeved on the outer tube, the air inlet, the high pressure piston chamber and the intermediate chamber are sequentially and axially disposed in the inner tube, the air inlet is disposed at the bottom end of the inner tube, the low pressure piston chamber and the low pressure chamber are disposed in the outer tube and correspond to the top end of the inner tube, the air outlet radially penetrates through the outer tube, the high pressure exhaust channel has a radial section and an axial outlet, the radial section is communicated with the high pressure piston chamber, and the axial outlet penetrates through the outer tube, so that the high pressure piston chamber is communicated with the outside of the valve tube assembly through the high pressure exhaust channel.

14. The pressure adjustment apparatus of claim 13, wherein the top end of the outer tube is formed with a radially extending grip portion.

15. The pressure regulating device of claim 13, wherein the air inlet assembly comprises a piercing unit having a hollow center and a tip and an inner channel, the inner channel having openings at two ends and communicating with the air inlet.

16. The pressure regulating device according to claim 13, wherein the first pressure regulating member comprises a high pressure piston, a high pressure elastic element, a high pressure airtight member and a high pressure connecting member, the high pressure piston is disposed in the high pressure piston chamber of the inner tube, the high pressure piston has a step portion therein, the high pressure piston has a crown portion and a piston rod, an axially disposed high pressure passage is formed in the high pressure piston, the high pressure passage is selectively communicated with the air inlet hole, at least one through hole is radially formed through a side edge of the piston rod, the high pressure elastic element is sleeved outside the piston rod of the high pressure piston and clamped between the crown portion of the high pressure piston and the step portion of the high pressure piston chamber, the high pressure airtight member abuts against a distal end of the piston rod of the high pressure piston and selectively seals a communication state between the high pressure passage and the air inlet hole, the high-pressure connecting piece is arranged in the medium chamber, the first end of the high-pressure connecting piece is adjacent to the crown part of the high-pressure piston, a medium channel axially penetrates through the high-pressure connecting piece, and the medium channel is communicated with the high-pressure channel of the high-pressure piston.

17. The pressure regulating device of claim 13, wherein the second pressure regulating member comprises a low pressure piston disposed in the low pressure piston chamber and adjacent to the high pressure connecting member, the low pressure piston having a crown and a piston rod, an axially disposed low pressure passage formed in the low pressure piston and selectively communicating with the intermediate passage of the high pressure connecting member, at least one through hole radially formed on a side of the piston rod, a first low pressure elastic member disposed in the low pressure piston chamber, sleeved outside the piston rod of the low pressure piston and clamped between the crown of the low pressure piston and the high pressure connecting member, the low pressure airtight member abutting against an end of the piston rod of the low pressure piston and selectively closing a communication state between the low pressure passage and the passage, the pressure regulating assembly is arranged in the low-pressure chamber and extends out of the top end of the outer tube, the second low-pressure elastic element is clamped between the pressure regulating assembly and the crown of the low-pressure piston, and the adjustment of the pressure regulating assembly can change the compression amount of the second low-pressure elastic element.

18. The pressure regulator of claim 17, wherein the pressure regulator assembly comprises an actuating member and a driven member, the actuating member rotatably abuts against the driven member, the second low pressure resilient member is sandwiched between the driven member and the crown of the low pressure piston, the actuating member and the driven member have corresponding ramps, and when the actuating member rotates relative to the driven member, the ramps of the actuating member push the driven member to axially move the driven member.

19. A gas storage device, characterized in that it comprises:

a gas storage unit;

a pressure regulating device, which is arranged at the opening of the gas storage unit and comprises:

a valve pipe assembly, part of which is inserted in the air storage unit, the valve pipe assembly is provided with an air inlet, an air outlet, a high-pressure piston chamber, an intermediate chamber, a low-pressure piston chamber and a high-pressure exhaust channel, the air outlet is selectively communicated with the low-pressure chamber, the intermediate chamber is selectively communicated with the low-pressure chamber, the high-pressure piston chamber is relatively positioned in the air storage unit, and the high-pressure piston chamber is communicated with the outside of the air storage unit through the high-pressure exhaust channel;

a second pressure regulating assembly disposed in the low pressure piston chamber and the low pressure chamber of the valve tube assembly for depressurizing the gas from the intermediate chamber and introducing the gas into the low pressure chamber when the gas passes through the second pressure regulating assembly.

20. The gas storage device as claimed in claim 19, wherein the valve tube assembly comprises an outer tube, a first inner tube and a second inner tube, the first inner tube and the second inner tube being inserted into the gas storage unit, a portion of the outer tube being inserted into the gas storage unit; the air inlet and the air outlet are radially arranged on the outer pipe, the high-pressure piston chamber, the medium chamber and the low-pressure chamber are axially arranged in the outer pipe, the high-pressure exhaust channel is arranged in the outer pipe and provided with an axial section and a radial section, the axial section of the high-pressure exhaust channel axially penetrates through the outer pipe, the radial section of the high-pressure exhaust channel is communicated with the high-pressure piston chamber, radially penetrates through the outer pipe and is communicated with the outside of the air storage unit, and the first inner pipe is sleeved at the tail end of the outer pipe; the first inner tube is internally provided with a containing chamber which axially penetrates through the first inner tube, and the containing chamber is communicated with the high-pressure exhaust channel; the second inner tube penetrates through the first inner tube, the high-pressure piston chamber axially penetrates through the second inner tube, an elongated slot is formed in the outer wall surface of the second inner tube in an inwards concave mode, a high-pressure exhaust hole radially penetrating through the second inner tube is formed in the elongated slot, the high-pressure exhaust hole is communicated with the high-pressure piston chamber, the high-pressure piston chamber is communicated with the accommodating chamber of the first inner tube through the high-pressure exhaust hole, and the high-pressure piston chamber is further communicated with the high-pressure exhaust channel of the outer tube through the accommodating chamber.

21. The gas storage device as claimed in claim 20, wherein the valve tube assembly comprises an outer tube and an inner tube, the inner tube is disposed around the outer tube, a portion of the outer tube is inserted into the gas storage unit, the inner tube is inserted into the gas storage unit, the gas inlet hole, the high pressure piston chamber and the intermediate chamber are axially disposed in the inner tube in sequence, the gas inlet hole is disposed at a bottom end of the inner tube, the low pressure piston chamber and the low pressure chamber are disposed in the outer tube and correspond to a top end of the inner tube, the gas outlet hole radially penetrates the outer tube and communicates with the gas storage unit, the high pressure exhaust passage has a radial section and an axial outlet, the radial section communicates with the high pressure piston chamber, and the axial outlet penetrates the outer tube and communicates with an outside of the gas storage unit.