A gas pressure regulator

Abstract

The present invention discloses a gas pressure regulator, comprising a valve body and a valve cover, wherein the valve cover is covered on the valve body, a valve cavity is arranged in the valve body, an air inlet channel and an air outlet channel are connected to the valve cavity, the valve cavity comprises a primary pressure regulating cavity and a secondary pressure regulating cavity, the primary pressure regulating cavity is connected to the secondary pressure regulating cavity through a valve port; the primary pressure regulating cavity is connected to the air inlet channel, a valve core pressure regulating assembly is arranged between the primary pressure regulating cavity and the air inlet channel; the secondary pressure regulating cavity is connected to the air outlet channel; a lever pressure regulating assembly is arranged between the valve port and the secondary pressure regulating cavity. The gas pressure regulator has good air tightness, high leakage safety and relatively stable output performance.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and more specifically to a gas pressure regulator. Background Art

[0002] When camping outdoors, many outdoor tourists will carry a burner and a gas bottle filled with fuel, and the gas in the gas bottle is transported to the burner. However, the gas in the gas bottle is compressed into liquid in advance for easy carrying and transportation. Therefore, when the gas is output, its pressure is very high. When it is transported to the burner, it cannot burn normally. Therefore, when the gas is output, a pressure regulator is usually set to reduce the gas pressure to facilitate the combustion of the gas.

[0003] The gas pressure regulators in the prior art include valve core single-stage gas pressure regulators and lever-type single-stage gas pressure regulators. The valve core single-stage gas pressure regulator has a simple structure, is easy to manufacture, has good air tightness, and will not leak due to increased intake pressure. However, when the pressure regulator is working, when the intake pressure decreases, the output pressure of this type of product will gradually increase. It is difficult to control the combustion firepower in actual use. When the gas inlet pressure is too high, there is a risk of output reduction that prevents the furnace from burning normally, and there is a risk of dangerous situations such as product explosion in the furnace. The lever-type single-stage gas pressure regulator has a simple structure and is easy to manufacture. When the pressure regulator is working, the pressure in the gas cylinder will gradually decrease as the gas volume in the gas cylinder decreases. When the intake pressure changes, the output pressure of the product will also decrease. There is a risk that the furnace cannot ensure the combustion of the burner head after the product output decreases, causing the gas product in the furnace to explode. In addition, since the lever pad parts are directly impacted by high-pressure gas, when the product is in the closed state, it is very easy to leak when the gas cylinder pressure is the highest, which poses a safety hazard. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a gas pressure regulator which has good air tightness, high leakage safety and relatively stable output performance.

[0005] The technical solution of the present invention is to provide a gas pressure regulator with the following structure, including a valve body and a valve cover, the valve cover is covered on the valve body, a valve cavity is provided in the valve body, an air inlet channel and an air outlet channel are connected to the valve cavity, the valve cavity includes a primary pressure regulating chamber and a secondary pressure regulating chamber, the primary pressure regulating chamber is connected to the secondary pressure regulating chamber through a valve port; the primary pressure regulating chamber is connected to the air inlet channel, a valve core pressure regulating assembly is provided between the primary pressure regulating chamber and the air inlet channel; the secondary pressure regulating chamber is connected to the air outlet channel; a lever pressure regulating assembly is provided between the valve port and the secondary pressure regulating chamber.

[0006] After adopting the above structure, the gas pressure regulator of the present invention has the following advantages compared with the prior art:

[0007] Since a valve core pressure regulating assembly is provided between the primary pressure regulating chamber and the air intake passage of the gas pressure regulator of the present invention, and a lever pressure regulating assembly is provided between the valve port and the secondary pressure regulating chamber, the gas pressure regulator of the present invention combines the advantages of the valve core pressure regulating assembly and the lever pressure regulating assembly. When the air intake pressure rises or falls, the two pressure regulating assemblies will have a complementary effect. Therefore, under different air intake pressures, the gas pressure regulator has excellent performance in terms of leakage safety and output performance stability.

[0008] As an improvement, the valve core pressure regulating assembly includes a high-pressure diaphragm, which is arranged in the valve cavity, and the high-pressure diaphragm separates the valve cavity into the primary pressure regulating cavity and the secondary pressure regulating cavity. The valve cavity is separated into the primary pressure regulating cavity and the secondary pressure regulating cavity by the high-pressure diaphragm, which has a simple structure and a reasonable design.

[0009] As an improvement, an annular step is provided in the valve body, and the edge of the high-pressure diaphragm is connected to the annular step surface; the first-stage pressure regulating chamber is located in the valve body and below the high-pressure diaphragm, and the second-stage pressure regulating chamber is located in the valve body and above the high-pressure diaphragm; a connecting channel connecting the first-stage pressure regulating chamber and the second-stage pressure regulating chamber is provided on the valve body and on the side wall of the first-stage pressure regulating chamber, and the port of the connecting channel located in the second-stage pressure regulating chamber is the valve port. After adopting this structure, the annular step is provided, the high-pressure diaphragm is more convenient to install, and the sealing between the two is better handled.

[0010] As an improvement, the annular step surface is provided with an annular embedding groove, the edge of the high-pressure diaphragm is provided with an embedding ring, and the embedding ring is embedded in the embedding groove; a gland is fixedly connected to the annular step surface and located above the high-pressure diaphragm, and the edge of the gland presses the embedding ring. After adopting this structure, the structure is simple, the assembly is convenient, and the sealing effect is good.

[0011] As an improvement, the edge of the gland is riveted onto the annular step surface. With this structure, assembly is more convenient.

[0012] As an improvement, the valve core pressure regulating assembly further comprises a high-pressure spring, and the high-pressure spring is arranged between the gland and the high-pressure diaphragm. With this structure, the structure is simple and the design is more reasonable.

[0013] As an improvement, a high-pressure diaphragm pad is provided on the surface of the high-pressure diaphragm close to the second pressure regulating cavity, and the middle part of the high-pressure diaphragm pad is riveted to the high-pressure mold plate through a high-pressure diaphragm rivet. After adopting this structure, the high-pressure diaphragm pad is provided on the high-pressure diaphragm, making the high-pressure diaphragm structure more reliable.

[0014] As an improvement, the edge of the high-pressure diaphragm pad is provided with a limiting convex ring, and the lower end of the high-pressure spring is limited in the limiting convex ring. After adopting this structure, the limiting structure is relatively simple.

[0015] As an improvement, the middle of the gland is sunken toward the high-pressure diaphragm to form a boss, the boss forms a groove on the side away from the high-pressure diaphragm, a through hole is provided in the middle of the boss, and the through hole is connected to the second pressure regulating chamber; the upper end of the high-pressure spring is sleeved outside the boss. With this structure, the boss can be used to limit the high-pressure spring, and the structural design is more reasonable.

[0016] As an improvement, a connecting seat is provided on the side wall of the air inlet passage of the valve body and located at the lower side of the connecting passage, an air inlet seat is sealed and connected to the connecting seat, an air inlet through hole communicating with the air inlet passage and the first-stage pressure regulating chamber is provided in the middle of the air inlet seat, a valve core of a valve core assembly is installed in the air inlet through hole, and the outer end of the valve core rod of the valve core abuts against the high-pressure diaphragm. With this structure, it is convenient to disassemble and assemble the valve core.

[0017] As an improvement, the lever pressure regulating assembly includes a lever, a lever spring and a low-pressure diaphragm; the lever includes a gas blocking end and an adjusting end, and the gas blocking end and the adjusting end of the lever are hinged on the annular step surface; the gas blocking end is used to block or open the valve port; the lever spring is supported between the adjusting end of the lever and the pressure cover; the edge of the low-pressure diaphragm is fixed at the connection between the valve body and the valve cover, and the valve cover is provided with an adjusting assembly, and the lower end of the adjusting assembly is against the low-pressure diaphragm. After adopting this structure, the lever pressure regulating assembly has a simple structure and a reasonable design.

[0018] As an improvement, the annular step surface and the two sides of the valve port are respectively provided with a first hinge seat and a second hinge seat; the lever is provided between the first hinge seat and the second hinge seat, the lever is connected with a lever pin, and the two ends of the lever pin are respectively hinged on the first hinge seat and the second hinge seat. With this structure, the design is more reasonable.

[0019] As an improvement, the first hinge seat and the second hinge seat are located outside one side of the gland, and the gland is provided with an air avoidance slope near the hinge of the lever. After adopting this structure, the air avoidance slope is provided on the gland to prevent the gland from interfering with the lever during its movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the gas pressure regulator of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the valve body of the gas pressure regulator of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the gas pressure regulator of the present invention after the valve body and the high-pressure diaphragm are assembled.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the high-pressure diaphragm of the gas pressure regulator of the present invention.

[0024] Figure 5 It is a schematic three-dimensional structure diagram of the high-pressure diaphragm of the gas pressure regulator of the present invention from another angle.

[0025] Figure 6 It is a partial three-dimensional structural schematic diagram of the gas pressure regulator of the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the gland of the gas pressure regulator of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the pressure cover of the gas pressure regulator of the present invention from another angle.

[0028] Fig. 9 It is a partial three-dimensional structural schematic diagram of the gas pressure regulator of the present invention.

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the lever of the gas pressure regulator of the present invention.

[0030] Fig.11 It is a schematic cross-sectional structural diagram of the gas pressure regulator of the present invention.

[0031] Fig.12 for Fig.11 Schematic diagram of the enlarged structure.

[0032] As shown in the figure: 1. valve body, 101. air inlet channel, 102. air outlet channel, 103. primary pressure regulating chamber, 104. secondary pressure regulating chamber, 105. valve port, 106. valve core, 107. high pressure diaphragm, 108. high pressure spring, 109. valve core rod, 110. annular step, 111. embedded groove, 112. embedded ring, 113. high pressure diaphragm rivet, 114. high pressure diaphragm gasket, 115, connecting channel, 116, pressure cover, 117, mounting ring, 118, limiting protrusion, 119, limiting groove, 120, pressure cover, 121, boss, 122, groove, 123, through hole, 124, limiting concave ring, 125, protrusion, 126, first hinge seat, 127, second hinge seat, 128, avoidance slope, 129, support ring, 130, connecting seat, 131, air inlet seat, 132. Inlet hole, 133. Valve core, 2. Valve cover, 201. Protruding neck, 3. Lever, 301. Air blocking end, 302. Adjusting end, 303. Limiting boss, 304. Conical protrusion, 305. Plug, 4. Lever spring, 5. Low-pressure diaphragm, 501. Low-pressure diaphragm gasket, 502. Low-pressure diaphragm rivet, 6. Lever pin, 7. Knob, 8. Sliding part, 9. Screw, 10. Knob spring, 11. Low-pressure spring. DETAILED DESCRIPTION

[0033] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0034] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0035] It should also be understood that the terms “comprises,” “including,” “has,” and “contains,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0036] like Figures 1 to 12 As shown, the present invention discloses a gas pressure regulator comprising a valve body 1 and a valve cover 2 , wherein the valve cover 2 covers the valve body 1 .

[0037] like Figure 1 to Figure 2As shown, the valve body 1 is provided with a valve cavity, an air inlet channel 101 and an air outlet channel 102. The air inlet channel 101 is provided at the lower end of the valve body 1, and the air outlet channel 102 is provided at the side of the valve body 1. The air inlet channel 101 and the air outlet channel 102 are both connected to the valve cavity. The air inlet channel 101 is used to connect to the bottle mouth of the gas bottle, and the air outlet channel 102 is used to connect to the connecting pipe.

[0038] like Figure 11 to Figure 12 As shown, the valve chamber includes a primary pressure regulating chamber 103 and a secondary pressure regulating chamber 104, the primary pressure regulating chamber 103 and the secondary pressure regulating chamber 104 are connected via a valve port 105; the primary pressure regulating chamber 103 is connected to the air inlet passage 101, and a valve core pressure regulating assembly is provided between the primary pressure regulating chamber 103 and the air inlet passage 101; the secondary pressure regulating chamber 104 is connected to the air outlet passage 102; a lever pressure regulating assembly is provided between the valve port 105 and the secondary pressure regulating chamber 104.

[0039] The valve core pressure regulating assembly includes a valve core 106, a high-pressure diaphragm 107 and a high-pressure spring 108. The valve core 106 is a prior art and will not be described in detail here. When the pressure at the valve core rod 109 of the valve core 106 is relatively high, the valve core rod 109 will be triggered to open the valve of the valve core to make it conductive. An annular step 110 is provided on the inner wall of the valve body 1, and an embedding groove 111 is provided on the annular step 110. The embedding groove 111 is an annular structure. The high-pressure diaphragm 107 is circular, and an embedding ring 112 is provided on the edge of the high-pressure diaphragm 107. The thickness of the embedding ring 112 is greater than that of the high-pressure diaphragm 107, and the edge of the high-pressure diaphragm 107 is connected to the middle position of the side wall of the embedding ring 112. The shape and size of the embedding ring 112 match the shape and size of the embedding groove 111, and the embedding ring 112 is embedded in the embedding groove 111. The middle part of the high-pressure diaphragm 107 is riveted with a high-pressure diaphragm gasket 114 through a high-pressure diaphragm rivet 113, and the high-pressure diaphragm gasket 114 is located on the upper side of the high-pressure diaphragm 107. The high-pressure diaphragm 107 divides the valve cavity into a primary pressure regulating cavity 103 and a secondary pressure regulating cavity 104. The lower part of the high-pressure diaphragm 107 is the primary pressure regulating cavity 103, and the upper part of the high-pressure diaphragm 107 is the secondary pressure regulating cavity 104. A connecting channel 115 is provided on the side wall of the valve body 1, one port of the connecting channel 115 is in communication with the primary pressure regulating cavity 103, and the other port of the connecting channel 115 is in communication with the secondary pressure regulating cavity 104. The other port of the connecting channel 115 is a valve port 105, which is provided on the annular step surface.

[0040] like Figures 7 and 8 As shown, the annular step surface is installed with a gland 116, the edge of which is pressed on the embedded ring 112 of the high-pressure diaphragm 107, and the edge of the gland 116 is fixed on the annular step surface by riveting. The edge of the gland 116 is thicker to form a mounting ring 117, the lower surface of the mounting ring 117 is a plane, and a limiting protrusion 118 is provided on the lower plane of the mounting ring 117, and a limiting groove 119 is provided on the upper plane of the embedded ring of the high-pressure diaphragm 107, and the limiting protrusion 118 is embedded in the limiting groove 119. The inner side of the mounting ring 117 is provided with a hollow gland cover 120 protruding upward, the middle part of the gland cover 120 is recessed downward to form a boss 121, the side of the boss 121 away from the high-pressure diaphragm 107 forms a groove 122, the middle part of the boss 121 is provided with a through hole 123, and the through hole 123 is connected to the secondary pressure regulating chamber 104. The high-pressure spring 108 is arranged between the gland 116 and the high-pressure diaphragm pad 114. The edge of the high-pressure diaphragm pad 114 is provided with a limiting convex ring 124, and the lower end of the high-pressure spring 108 is limited to the inner side of the limiting convex ring 124 to prevent the lower end of the high-pressure spring 108 from falling out during use. The upper end of the high-pressure spring 108 is sleeved outside the boss 121 to prevent the upper end of the high-pressure spring 108 from falling out during use.

[0041] like Fig.10As shown, the lever pressure regulating assembly includes a lever 3, a lever spring 4 and a low-pressure diaphragm 5, and the lever 3 includes a gas blocking end 301 and an adjusting end 302. A protrusion 125 is provided on the annular step surface and located on the outside of the pressure cover 116, and the middle of the protrusion 125 is hollow to form the valve port 105. A first hinge seat 126 and a second hinge seat 127 are respectively provided on the annular step surface and located on both sides of the protrusion 125, and the first hinge seat 126 and the second hinge seat 127 are both located on the outside of the pressure cover 116 and are symmetrically arranged with each other. The part between the gas blocking end 301 and the adjusting end 302 of the lever 3 is hinged to the first hinge seat 126 and the second hinge seat 127 through a lever pin 6, so that the lever 3 can swing back and forth with the lever pin 6 as a fulcrum. The mounting ring 117 of the pressure cover 116 is provided with a space-avoiding inclined surface 128 on the part between the first hinge seat 126 and the second hinge seat 127 to avoid interference with the lever 3 when the lever 3 swings. A plug (not shown) is provided on the side of the gas blocking end 301 of the lever 3 close to the valve port 105, and the plug is used to block the valve port 105. The lever spring 4 is arranged between the pressure cover 116 and the adjustment end 302 of the lever 3. A support ring 129 is provided at the bottom of the groove 122 of the pressure cover 116, and the middle part of the support ring 129 is the through hole 123. The lower end of the lever spring 4 is installed on the support ring 129, and the side wall of the groove 122 limits the lever spring 4. A limiting boss 303 is provided on the lower surface of the adjustment end 302 of the lever 3 close to the pressure cover 116, and the upper end of the lever spring 4 is sleeved outside the limiting boss 303.

[0042] A low-pressure diaphragm 5 is provided between the valve body 1 and the valve cover 2, and the low-pressure diaphragm 5 is press-fitted at the connection between the valve body 1 and the valve cover 2. A low-pressure diaphragm gasket 501 is provided on the upper side of the low-pressure diaphragm 5, and the low-pressure diaphragm gasket 501 is riveted to the low-pressure diaphragm 5 through a low-pressure diaphragm rivet 502. A hollow convex neck 201 is provided at the upper end of the valve cover 2, and a knob 7 that is axially limited and circumferentially rotatable is provided at the upper end of the convex neck 201. A sliding member 8 is slidably fitted in the convex neck 201, and the sliding member 8 can slide along the length direction of the convex neck 201, and the convex neck 201 limits the sliding member circumferentially. A threaded hole is provided on the upper end surface of the sliding member 8, and a screw is provided on the inner wall of the knob 7, and the screw fits in the threaded hole. A knob spring 10 is provided between the inner wall of the knob 7 and the upper end of the convex neck 201, and a low-pressure spring 11 is provided between the lower end of the sliding member 8 and the low-pressure diaphragm pad 501. A conical protrusion 304 is provided on the upper surface of the adjusting end 302 of the lever 3 close to the low-pressure diaphragm 5, and the conical protrusion 304 abuts against the middle of the low-pressure diaphragm rivet 502.

[0043] A connecting seat 130 is provided on the side wall of the air inlet channel 101 of the valve body 1 and located at the lower side of the connecting channel 115. An air inlet seat 131 is sealed and connected to the connecting seat 130. An air inlet through hole 132 communicating with the air inlet channel 101 and the primary pressure regulating chamber 103 is provided in the middle of the air inlet through hole 132. A valve core 133 is installed in the air inlet through hole 132. The outer end of the valve core rod 109 of the valve core 133 abuts against the middle of the high-pressure diaphragm rivet 113 of the high-pressure diaphragm 107.

[0044] When assembling the gas pressure regulator of the present invention, the lower end of the valve body is connected to the outlet of the small gas bottle, so that the air inlet channel of the valve body is connected to the inner cavity of the small gas bottle, and the pressure in the air inlet channel is the same as the pressure in the small gas bottle. When the gas pressure regulator of the present invention is working:

[0045] When the gas pressure regulator is connected to the outlet of the small gas cylinder, the gas is input into the pressure regulator at a pressure of 25 to 201PSI (the more sufficient the gas in the bottle, the higher the pressure). The gas first passes through the first-stage valve core pressure relief structure of the pressure regulator. When a certain amount of gas passes through the valve core, the pressure in the area below the high-pressure diaphragm will increase, prompting the high-pressure diaphragm to overcome the upward displacement of the high-pressure spring. The upward displacement of the high-pressure diaphragm causes the rivet holding the valve core to also detach from the valve core (the valve core is closed) so that the pressure is no longer increased. Only when the gas is output and the pressure in the area below the high-pressure diaphragm drops, the high-pressure diaphragm will move downward under the action of the high-pressure spring, connecting the valve core to allow the gas to pass through to supplement the pressure. Such a high-frequency cycle also utilizes the back-pressure characteristics of the valve core (the lower the pressure in the gas cylinder, the higher the pressure after the first-stage pressure reduction) to keep the pressure in the first-stage pressure relief area below the high-pressure diaphragm within a controllable pressure range of 10 to 15PSI.

[0046] The pressure fluctuation range of the gas after the first-stage pressure reduction is still large and cannot meet the requirement of accurately controlling the gas output. This scheme uses the lever two-stage pressure reduction structure to achieve accurate pressure reduction of the gas that has undergone the first-stage pressure reduction. When a certain amount of gas passes through the lever valve port, the pressure below the low-pressure diaphragm is increased, prompting the low-pressure diaphragm to overcome the low-pressure spring and move upward. The upward displacement of the low-pressure diaphragm causes the rivet supporting the tail end of the lever to detach, and at the same time, the tail end of the lever will close the valve port under the action of the lever spring under the lever so that the pressure in the secondary pressure reduction area is no longer increased. Only when the gas is output and the pressure in the area below the low-pressure diaphragm drops, the low-pressure diaphragm will move downward under the action of the upper low-pressure spring to overcome the lever spring, so that the valve port is opened to allow gas to pass through to supplement the pressure. The high-frequency cycle also utilizes the positive pressure characteristics of the lever (the lower the input, the more steadily the pressure will decrease after pressure reduction), thereby achieving accurate pressure regulation of the gas cylinder pressure of 25-201PSI to the final gas output requirement of 5±0.3kPa.

Claims

1. A gas pressure regulator, comprising a valve body and a valve cover, wherein the valve cover covers the valve body, the valve body is provided with a valve cavity, and the valve cavity is connected with an air inlet channel and an air outlet channel, characterized in that: The valve chamber comprises a primary pressure regulating chamber and a secondary pressure regulating chamber, wherein the primary pressure regulating chamber is connected to the secondary pressure regulating chamber through a valve port; the primary pressure regulating chamber is connected to the air inlet passage, and a valve core pressure regulating assembly is arranged between the primary pressure regulating chamber and the air inlet passage; the secondary pressure regulating chamber is connected to the air outlet passage; a lever pressure regulating assembly is arranged between the valve port and the secondary pressure regulating chamber; the valve core pressure regulating assembly comprises a high-pressure diaphragm, wherein the high-pressure diaphragm is arranged in the valve chamber, and the high-pressure diaphragm divides the valve chamber into the primary pressure regulating chamber and the secondary pressure regulating chamber; an annular step is arranged in the valve body, and the edge of the high-pressure diaphragm is connected to the end surface of the annular step; the primary pressure regulating chamber is located in the valve body and below the high-pressure diaphragm, and the secondary pressure regulating chamber is located in the valve body and above the high-pressure diaphragm; a connecting channel connecting the primary pressure regulating chamber and the secondary pressure regulating chamber is arranged on the valve body and on the side wall of the primary pressure regulating chamber, and the port of the connecting channel located in the secondary pressure regulating chamber is the valve port; An annular embedding groove is provided on the end face of the annular step, and an embedding ring is provided on the edge of the high-pressure diaphragm, and the embedding ring is embedded in the embedding groove; a pressure cover is fixedly connected to the end face of the annular step and located above the high-pressure diaphragm, and the edge of the pressure cover presses the embedding ring; a connecting seat is provided on the side wall of the air inlet channel of the valve body and located on the lower side of the connecting channel, and an air inlet seat is sealed and connected to the connecting seat, and an air inlet through hole connected to the air inlet channel and the first-stage pressure regulating chamber is provided in the middle of the air inlet seat, and a valve core of a valve core assembly is installed in the air inlet through hole, and the outer end of the valve core stem of the valve core abuts against the high-pressure diaphragm.

2. The gas pressure regulator according to claim 1, characterized in that: The edge of the gland is riveted onto the end surface of the annular step.

3. The gas pressure regulator according to claim 1, characterized in that: The valve core pressure regulating assembly also includes a high-pressure spring, and the high-pressure spring is arranged between the pressure cover and the high-pressure diaphragm.

4. The gas pressure regulator according to claim 3, characterized in that: A high-pressure diaphragm pad is provided on the surface of the high-pressure diaphragm close to the secondary pressure regulating cavity, and the middle part of the high-pressure diaphragm pad is riveted to the high-pressure diaphragm through a high-pressure diaphragm rivet.

5. The gas pressure regulator according to claim 4, characterized in that: The edge of the high-pressure diaphragm pad is provided with a limiting convex ring, and the lower end of the high-pressure spring is limited in the limiting convex ring.

6. The gas pressure regulator according to claim 3, characterized in that: The middle part of the pressure cover is recessed toward the high-pressure diaphragm to form a boss, and a groove is formed on the side of the boss away from the high-pressure diaphragm. A through hole is provided in the middle part of the boss, and the through hole is connected to the secondary pressure regulating chamber; the upper end of the high-pressure spring is sleeved outside the boss.

7. The gas pressure regulator according to claim 1, characterized in that: The lever pressure regulating assembly includes a lever, a lever spring and a low-pressure diaphragm; the lever includes an air blocking end and an adjusting end, and the air blocking end and the adjusting end of the lever are hinged on the end surface of the annular step; the air blocking end is used to block or open the valve port; the lever spring is supported between the adjusting end of the lever and the pressure cover; the edge of the low-pressure diaphragm is fixed at the connection between the valve body and the valve cover, and the valve cover is provided with an adjusting assembly, and the lower end of the adjusting assembly rests on the low-pressure diaphragm.

8. The gas pressure regulator according to claim 7, characterized in that: A first hinge seat and a second hinge seat are respectively provided on the end surface of the annular step and on both sides of the valve port; the lever is provided between the first hinge seat and the second hinge seat, and a lever pin is connected to the lever, and both ends of the lever pin are respectively hinged on the first hinge seat and the second hinge seat.

9. The gas pressure regulator according to claim 8, characterized in that: The first hinge seat and the second hinge seat are located outside one side of the pressure cover, and the pressure cover is provided with a space-avoiding inclined surface at a position close to the hinge of the lever.

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