Natural gas pressure regulating pry

Abstract

The utility model belongs to the field of safe natural gas conveying, and particularly relates to a natural gas pressure regulating pry which comprises a main pipe. A pressure regulating valve is assembled in the middle of the side wall of the main pipe; an air outlet pipe is fixedly connected to the middle of the side wall of the pressure regulating valve; the end part of the air outlet pipe is fixedly connected with an air pump; an air inlet pipe is fixed in the middle of the side wall of the air pump; the main pipe, the pressure regulating valve, the air outlet pipe, the air pump and the air inlet pipe are all hollow and are communicated with one another; by means of the arrangement, when natural gas is not directly supplied to the RTO, the pipeline is switched to the direction of the liquid nitrogen storage tank, the gasified natural gas exchanges heat with liquid nitrogen below zero to be liquefied into LNG again, the LNG flows back to the LNG storage tank to form internal circulation, it is guaranteed that the pressure of the natural gas supplied to the RTO is stable, normal operation of the RTO is prevented from being affected by pressure fluctuation, and the service life of the RTO is prolonged. And the volume of LNG is much smaller than that of gaseous natural gas, more natural gas can be stored in the same storage space, and therefore the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of natural gas safe transportation, in particular to a natural gas pressure regulating skid. Background Art

[0002] A natural gas pressure-regulating skid is a device specifically designed to regulate and control pressure in natural gas pipelines. Its core component is the pressure-regulating valve, which automatically or manually adjusts the pressure of the medium in the pipeline, ensuring safe and economical operation. It also maintains a stable outlet pressure despite fluctuating inlet pressure and downstream flow.

[0003] Natural gas pressure-regulating skids are widely used in existing natural gas supply systems, such as emergency gas supply, residential gas supply, and industrial production gas supply. Long-term use and observation have shown that when using pressure-regulating skids to deliver natural gas, switching the pipeline to the liquid nitrogen storage tank, when natural gas is no longer supplied directly to the RTO, can improve energy efficiency. This allows the natural gas to circulate within the pipeline.

[0004] To this end, the utility model provides a natural gas pressure regulating skid. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve at least one problem raised in the background art, a natural gas pressure regulating skid is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: the utility model describes a natural gas pressure regulating skid, comprising a main pipe; a pressure regulating valve is installed in the middle of the side wall of the main pipe; an outlet pipe is fixedly connected to the middle of the side wall of the pressure regulating valve; an air pump is fixedly connected to the end of the outlet pipe; an air inlet pipe is fixed to the middle of the side wall of the air pump; the main pipe, the pressure regulating valve, the outlet pipe, the air pump and the air inlet pipe are all hollow and connected; an opening and closing component is threadedly connected to the middle of the side wall of the main pipe; a sealing plug is threadedly connected to the other side of the opening and closing component; a first round pipe is fixed to the middle of the side wall of the sealing plug; and a The second circular pipe; the main pipe, the opening and closing assembly, the sealing plug, the first circular pipe and the second circular pipe are connected; through this setting, when natural gas is no longer directly supplied to the RTO, the pipeline can be switched to the direction of the liquid nitrogen storage tank, and the gasified natural gas is used to exchange heat with the sub-zero liquid nitrogen to re-liquefy it into LNG, and return it to the LNG storage tank to form an internal circulation to ensure that the pressure of the natural gas supplied to the RTO is stable, avoiding the normal operation of the RTO affected by pressure fluctuations, and the volume of LNG is much smaller than that of gaseous natural gas, so more natural gas can be stored in the same storage space, thereby improving energy utilization efficiency.

[0007] Preferably, the opening and closing assembly includes a valve body; the valve body is threadedly connected between the main pipe and the sealing plug; the top side wall of the valve body is rotatably connected to an upper bearing; a rotating assembly is provided in the middle of the side wall of the upper bearing; a ball is fixedly connected to the end of the upper bearing; the ball is arranged inside the valve body; a vent is provided in the middle of the side wall of the ball; the bottom side wall of the ball is fixedly connected to a lower bearing; the lower bearing and the valve body are rotatably connected; a valve seat is fixedly connected to the middle of the inner side wall of the valve body; the valve seats are a pair and are symmetrically arranged on both sides of the ball; the valve seat and the ball are rotatably connected; the valve seat and the valve There are multiple cavities between the valve body and the ball; the top side wall of the cavity is fixedly connected to the air intake assembly; this step can fill the cavity with gas through this arrangement, and a positive pressure area will be formed inside the cavity, that is, the pressure inside the cavity is higher than the external pressure, and the positive pressure will push the valve seat to press more tightly against the ball, reducing the possibility of natural gas leaking from the gap between the valve seat and the ball, improving the sealing of the valve body, and at the same time, the pressure difference setting will also prevent natural gas from entering the cavity, reducing the situation where natural gas passes through the cavity and flows to the sealing plug, further ensuring the good sealing of the valve body.

[0008] Preferably, the air intake assembly includes an air cylinder; the air cylinder is arranged above the cavity; a piston plate is slidably connected to the middle of the inner wall of the air cylinder; the piston plate and the air cylinder are interference fit; a connecting rod is fixedly connected to the top side wall of the piston plate; a connecting pipe is fixedly connected to the middle of the side wall of the air cylinder; the air cylinder, connecting pipe and cavity are all hollow and connected; in this step, by arranging the air cylinder, piston plate, connecting rod and connecting pipe, the staff only needs to press the connecting rod to quickly provide the required air pressure to the inside of the cavity, saving time and manpower.

[0009] Preferably, a spring is fixedly connected to the middle of the inner wall of the valve body; the springs are a pair and are symmetrically arranged inside the valve body; a sealing plate is fixedly connected to the end of the spring; the sealing plate and the vent are correspondingly arranged; by arranging the spring and the sealing plate in this step, the sealing plate can be tightly fitted on the sphere, forming an effective sealing barrier to prevent the possibility of natural gas flowing to the sealing plug through the gap between the valve body and the vent.

[0010] Preferably, an airbag is fixedly connected to the middle of the side wall of the valve seat; the airbag is made of elastic material; the airbag and the cavity are both hollow and connected; this step allows the airbag to fit tightly against the surface of the connection between the sphere and the cavity, forming an effective sealing barrier to effectively isolate the leakage of natural gas, and the airbag can be adjusted according to the shape and size of the connection, and is suitable for the connection between spheres and cavities of different materials and complex shapes, providing a reliable sealing effect.

[0011] Preferably, the rotating assembly includes a rotary valve; the rotary valve is fixed to the side wall of the upper bearing; this step sets a rotary valve with high precision and sensitivity, which can achieve fine adjustment of the movement of the upper bearing, and through the rotary valve, the staff can easily change the movement direction of the upper bearing to achieve flexible control in multiple directions.

[0012] Preferably, an anti-slip pad is fixed to the middle of the side wall of the rotary valve; the anti-slip pad is made of elastic material; this step can increase the friction between the hand and the rotary valve by setting the anti-slip pad, preventing the hand from slipping or falling out during operation, thereby improving the stability of the grip.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The natural gas pressure regulating skid described in the present invention can, through this configuration, switch the pipeline to the liquid nitrogen storage tank when natural gas is no longer directly supplied to the RTO. The gasified natural gas is heat exchanged with sub-zero liquid nitrogen to be re-liquefied into LNG, which is then returned to the LNG storage tank to form an internal circulation, thereby ensuring the stability of the natural gas pressure supplied to the RTO and avoiding the normal operation of the RTO due to pressure fluctuations. In addition, the volume of LNG is much smaller than that of gaseous natural gas, so more natural gas can be stored in the same storage space, thereby improving energy utilization efficiency.

[0015] 2. The natural gas pressure regulating skid described in the present invention can, through this setting, switch the pipeline to the liquid nitrogen storage tank when the natural gas is no longer directly supplied to the RTO, and use the gasified natural gas to exchange heat with the sub-zero liquid nitrogen to re-liquefy it into LNG, and return it to the LNG storage tank to form an internal circulation, so as to ensure the stability of the natural gas pressure supplied to the RTO and avoid the normal operation of the RTO being affected by pressure fluctuations. In addition, the volume of LNG is much smaller than that of gaseous natural gas, and more natural gas can be stored in the same storage space, thereby improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the valve body in the utility model;

[0019] Figure 3 It is an exploded view of the valve body in the utility model;

[0020] Figure 4 It is a schematic diagram of the matching structure of the round tube and the valve body in the utility model.

[0021] Legend:

[0022] 1. Main pipe; 11. Pressure regulating valve; 12. Outlet pipe; 13. Air pump; 14. Inlet pipe; 15. Sealing plug; 16. First round pipe; 17. Second round pipe; 2. Valve body; 21. Upper bearing; 22. Ball; 23. Vent; 24. Lower bearing; 25. Valve seat; 26. Cavity; 3. Air cylinder; 31. Piston plate; 32. Connecting rod; 33. Connecting pipe; 4. Spring; 41. Sealing plate; 5. Airbag; 6. Rotating valve; 7. Anti-slip pad. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Specific examples are given below.

[0025] like Figures 1 to 4As shown, a natural gas pressure regulating skid according to an embodiment of the present invention comprises a main pipe 1; a pressure regulating valve 11 is mounted in the middle of the side wall of the main pipe 1; an outlet pipe 12 is fixedly connected in the middle of the side wall of the pressure regulating valve 11; an air pump 13 is fixedly connected to the end of the outlet pipe 12; an air inlet pipe 14 is fixed in the middle of the side wall of the air pump 13; the main pipe 1, the pressure regulating valve 11, the outlet pipe 12, the air pump 13 and the air inlet pipe 14 are all hollow and connected; an opening and closing assembly is threadedly connected in the middle of the side wall of the main pipe 1; a sealing plug 15 is threadedly connected to the other side of the opening and closing assembly; the sealing plug 15 is threadedly connected in the middle of the side wall A first round tube 16 is fixed; a second round tube 17 is fixed to the middle of the side wall of the sealing plug 15; the main pipe 1, the opening and closing assembly, the sealing plug 15, the first round tube 16 and the second round tube 17 are connected; when working, the staff seals the second round tube 17 and connects the first round tube 16 to the RTO, then connects the air inlet pipe 14 to the natural gas storage tank, starts the air pump 13, and the air pump 13 will draw natural gas into the air outlet pipe 12. At this time, the natural gas will enter the pressure regulating valve 11, and the pressure regulating valve 11 will discharge the gas into the main pipe 1. At this time, the staff starts the opening and closing assembly. The opening and closing assembly is opened, and the main pipe 1, the sealing plug 15, and the first circular pipe 16 are connected, so that natural gas can smoothly pass through the opening and closing assembly into the first circular pipe 16, and then the natural gas can be provided to the RTO for use. When the natural gas is no longer provided to the RTO, the staff seals the first circular pipe 16 and connects the second circular pipe 17 to the LNG storage tank. At this time, the gasified natural gas is converted into LNG under the action of liquid nitrogen and then returns to the LNG storage tank. When the natural gas is no longer needed, the staff closes the opening and closing assembly. At this time, the inside of the pipeline is no longer connected. This step can be set up in this way. When the natural gas is no longer directly supplied to the RTO, the pipeline can be switched to the liquid nitrogen storage tank. The gasified natural gas is heat exchanged with the sub-zero liquid nitrogen to be re-liquefied into LNG, and then returned to the LNG storage tank to form an internal circulation, so as to ensure the stability of the natural gas pressure supplied to the RTO and avoid the normal operation of the RTO being affected by pressure fluctuations. In addition, the volume of LNG is much smaller than that of gaseous natural gas, and more natural gas can be stored in the same storage space, thereby improving energy utilization efficiency.

[0026] like Figures 1 to 4As shown, the opening and closing assembly includes a valve body 2; the valve body 2 is threadedly connected between the main pipe 1 and the sealing plug 15; the top side wall of the valve body 2 is rotatably connected to an upper bearing 21; a rotating assembly is provided in the middle of the side wall of the upper bearing 21; a ball 22 is fixedly connected to the end of the upper bearing 21; the ball 22 is arranged inside the valve body 2; a vent 23 is provided in the middle of the side wall of the ball 22; a lower bearing 24 is fixedly connected to the bottom side wall of the ball 22; the lower bearing 24 is rotatably connected to the valve body 2; a valve seat 25 is fixedly connected to the middle of the inner side wall of the valve body 2; the valve seats 25 are a pair and are symmetrically arranged on both sides of the ball 22; the valve seat 25 and the ball 22 are rotatably connected; multiple valves are provided between the valve seat 25 and the valve body 2. A cavity 26; an air intake assembly is fixed to the side wall of the top of the cavity 26; during operation, the staff connects the main pipe 1 and the sealing plug 15 to the two ends of the valve body 2 respectively, and then rotates the upper bearing 21 through the rotating assembly, so that the upper bearing 21 rotates with the ball 22 inside the valve body 2. At this time, the ball 22 rotates ninety degrees, so that the vent 23 is connected to the main pipe 1 and the sealing plug 15. At this time, the natural gas entering the valve body 2 will pass through the vent 23 and then flow into the sealing plug 15. When the natural gas is no longer needed to flow out of the valve body 2, the staff rotates the upper bearing 21 again through the rotating assembly. At this time, the ball 22 rotates ninety degrees again. The vent 23 is staggered with the main pipe 1 and the sealing plug 15. At this time, the natural gas will be intercepted by the ball 22 and will no longer flow to the sealing plug 15. When the ball 22 rotates inside the valve body 2, the ball 22 will always be in contact with the valve seat 25. The valve seat 25 will seal the gap formed between the ball 22 and the valve body 2. At this time, multiple cavities 26 are formed between the valve seat 25 and the valve body 2. The staff connects the air intake assembly to the top of the cavity 26 and uses the air intake assembly to inject gas into the cavity 26. At this time, the natural gas will not enter the cavity 26 under the action of the pressure difference, thereby sealing the gap between the valve body 2 and the valve seat 25. At this time, the gas from the main pipe 1 will not enter the cavity 26. The natural gas entering the pipe 1 will not flow out to the sealing plug 15 through the sphere 22. In this step, the cavity 26 can be filled with gas through this setting. At this time, a positive pressure area will be formed inside the cavity 26, that is, the pressure inside the cavity 26 is higher than the external pressure, and the positive pressure will push the valve seat 25 to press more tightly against the sphere 22, reducing the possibility of natural gas leaking from the gap between the valve seat 25 and the sphere 22, and improving the sealing performance of the valve body 2. At the same time, the pressure difference setting will also prevent natural gas from entering the cavity 26, reducing the situation where natural gas passes through the cavity 26 and flows to the sealing plug 15, further ensuring the good sealing performance of the valve body 2.

[0027] like Figures 1 to 4As shown, the air intake assembly includes an air cylinder 3; the air cylinder 3 is arranged above the cavity 26; a piston plate 31 is slidably connected to the middle of the inner wall of the air cylinder 3; the piston plate 31 and the air cylinder 3 are interference fit; a connecting rod 32 is fixed to the top side wall of the piston plate 31; a connecting pipe 33 is fixed to the middle of the side wall of the air cylinder 3; the air cylinder 3, the connecting pipe 33 and the cavity 26 are all hollow and connected; during work, the staff injects gas into the air cylinder 3 through the connecting pipe 33, and then seals the connecting pipe 33, and then the staff presses multiple connecting rods 32 so that the connecting rod 32 moves the piston plate 31 toward the cavity 26, and the gas inside the air cylinder 3 is filled into the cavity 26. In this step, by setting the air cylinder 3, the piston plate 31, the connecting rod 32 and the connecting pipe 33, the staff only needs to press the connecting rod 32 to quickly provide the required air pressure to the inside of the cavity 26, saving time and manpower.

[0028] like Figure 3 As shown, a spring 4 is fixed to the middle of the inner wall of the valve body 2; the springs 4 are a pair and are symmetrically arranged inside the valve body 2; a sealing plate 41 is fixed to the end of the spring 4; the sealing plate 41 and the vent 23 are arranged correspondingly; during operation, when the natural gas is no longer required to flow out of the sealing plug 15, the ball 22 will rotate under the drive of the rotating assembly until it is completely blocked by the inner wall of the valve body 2, so that the natural gas will not flow to the sealing plug 15 through the main pipe 1. During the rotation of the ball 22, the sealing plate 41 will be continuously squeezed, because the sealing plate 41 and the vent 23 are The vent 23 is set accordingly. When the ball 22 stops rotating, the vent 23 is parallel to the sealing plate 41, and the ball 22 no longer squeezes the sealing plate 41. At this time, the sealing plate 41 will enter the inside of the vent 23 under the action of the spring 4, and completely block the vent 23. In this step, by setting the spring 4 and the sealing plate 41, the sealing plate 41 can be tightly fitted on the ball 22 to form an effective sealing barrier, preventing the possibility of natural gas flowing to the sealing plug 15 through the gap between the valve body 2 and the vent 23.

[0029] like Figure 3 and Figure 4 As shown, an airbag 5 is fixed to the middle of the side wall of the valve seat 25; the airbag 5 is made of elastic material; the airbag 5 and the cavity 26 are both hollow and connected; during operation, because the airbag 5 and the cavity 26 are connected, when the air intake assembly injects gas into the cavity 26, the airflow will enter the airbag 5. Because the airbag 5 is made of elastic material, the airbag 5 will expand and block the connection between the sphere 22 and the cavity 26. In this step, the airbag 5 can fit tightly to the surface of the connection between the sphere 22 and the cavity 26 to form an effective sealing barrier, effectively isolating the leakage of natural gas, and the airbag 5 can be adjusted according to the shape and size of the connection, and is suitable for the connection between the sphere 22 and the cavity 26 of different materials and complex shapes, providing a reliable sealing effect.

[0030] like Figures 1 to 3As shown, the rotating assembly includes a rotating valve 6; the rotating valve 6 is fixedly connected to the side wall of the upper bearing 21; during operation, the staff rotates the rotating valve 6 to rotate the upper bearing 21, so that the upper bearing 21 drives the ball 22 to rotate. This step sets a rotating valve 6 with high precision and sensitivity, which can achieve fine adjustment of the movement of the upper bearing 21, and by rotating the valve 6, the staff can easily change the movement direction of the upper bearing 21, thereby achieving flexible control in multiple directions.

[0031] like Figures 1 to 3 As shown, an anti-slip pad 7 is fixed to the middle of the side wall of the rotary valve 6; the anti-slip pad 7 is made of elastic material; this step increases the friction between the hand and the rotary valve 6 by setting the anti-slip pad 7, preventing the hand from sliding or falling off during operation, thereby improving the stability of the grip.

[0032] Working principle: The staff seals the second round pipe 17 and connects the first round pipe 16 to the RTO, then connects the air inlet pipe 14 to the natural gas storage tank, starts the air pump 13, and the air pump 13 will draw the natural gas into the air outlet pipe 12. At this time, the natural gas will enter the pressure regulating valve 11, and the pressure regulating valve 11 will discharge the gas into the main pipe 1. At this time, the staff starts the opening and closing component, the opening and closing component opens, and connects the main pipe 1 and the sealing plug 15 and the first round pipe 16, so that the natural gas can smoothly pass through the opening and closing component into the first round pipe 16, and the natural gas can be provided to the RTO for use. When the natural gas is no longer provided to the RTO, the staff seals the first round pipe 16 and connects the second round pipe 17 to the LNG storage tank. At this time, the gasified natural gas becomes liquid nitrogen under the action of liquid nitrogen. LNG, and then returns to the LNG storage tank. When natural gas is no longer needed, the staff closes the opening and closing component. At this time, the inside of the pipeline is no longer connected. The staff connects the main pipe 1 and the sealing plug 15 to the two ends of the valve body 2 respectively, and then rotates the upper bearing 21 through the rotating component, so that the upper bearing 21 rotates with the ball 22 inside the valve body 2. At this time, the ball 22 will rotate ninety degrees, so that the vent 23 is connected to the main pipe 1 and the sealing plug 15. At this time, the natural gas entering the valve body 2 will pass through the vent 23 and then flow into the sealing plug 15. When natural gas is no longer needed to flow out of the valve body 2, the staff will rotate the upper bearing 21 again through the rotating component. At this time, the ball 22 will rotate ninety degrees again, so that the vent 23 and the main pipe 1 and the sealing plug 15 are staggered. At this time, the natural gas will be intercepted by the ball 22 and will no longer flow to the sealing plug 15. When the ball 22 rotates inside the valve body 2, the ball 22 will always be in contact with the valve seat 25, and the valve seat 25 will seal the gap formed between the ball 22 and the valve body 2. At this time, multiple cavities 26 are formed between the valve seat 25 and the valve body 2. The staff connects the air intake assembly on the top of the cavity 26 and uses the air intake assembly to inject gas into the cavity 26. At this time, the natural gas will not enter the cavity 26 under the action of the pressure difference, thereby sealing the gap between the valve body 2 and the valve seat 25. At this time, the natural gas entering from the main pipe 1 will not flow out of the ball 22 to the sealing plug 15. The staff injects gas into the gas cylinder 3 through the connecting pipe 33, and then seals the connecting pipe 33. Then the staff The operator presses multiple connecting rods 32, so that the connecting rods 32 move the piston plate 31 toward the cavity 26, and the gas inside the cylinder 3 is filled into the cavity 26. When the natural gas is no longer needed to flow out of the sealing plug 15, the ball 22 will rotate under the drive of the rotating assembly until it is completely blocked by the inner wall of the valve body 2, so that the natural gas will not flow to the sealing plug 15 through the main pipe 1. During the rotation of the ball 22, the sealing plate 41 will be continuously squeezed. Because the sealing plate 41 and the vent 23 are correspondingly arranged, when the ball 22 stops rotating, the vent 23 is parallel to the sealing plate 41, and the ball 22 no longer squeezes the sealing plate 41. At this time, the sealing plate 41 will enter the vent 23 under the action of the spring 4, and the vent 23 is completely blocked. Because the airbag 5 and the cavity 26 are connected,When the air intake assembly injects gas into the cavity 26, the airflow enters the airbag 5. Since the airbag 5 is made of elastic material, it will expand and block the connection between the sphere 22 and the cavity 26. The operator rotates the valve 6 to rotate the upper bearing 21, so that the upper bearing 21 drives the sphere 22 to rotate.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas pressure regulating skid, comprising a main pipe (1); characterized in that: The middle part of the side wall of the main pipe (1) is equipped with a pressure regulating valve (11); the middle part of the side wall of the pressure regulating valve (11) is fixedly connected to an air outlet pipe (12); the end of the air outlet pipe (12) is fixedly connected to an air pump (13); the middle part of the side wall of the air pump (13) is fixed to an air inlet pipe (14); the main pipe (1), the pressure regulating valve (11), the air outlet pipe (12), the air pump (13) and the air inlet pipe (14) are all hollow and connected; the middle part of the side wall of the main pipe (1) is threadedly connected to an opening and closing component; the other side of the opening and closing component is threadedly connected to a sealing plug (15); the middle part of the side wall of the sealing plug (15) is fixed to a first round pipe (16); the middle part of the side wall of the sealing plug (15) is fixed to a second round pipe (17); the main pipe (1), the opening and closing component, the sealing plug (15), the first round pipe (16) and the second round pipe (17) are connected.

2. A natural gas pressure regulating skid according to claim 1, characterized in that: The opening and closing assembly comprises a valve body (2); the valve body (2) is threadedly connected between the main pipe (1) and the sealing plug (15); the top side wall of the valve body (2) is rotatably connected to an upper bearing (21); a rotating assembly is provided in the middle of the side wall of the upper bearing (21); a ball (22) is fixedly connected to the end of the upper bearing (21); the ball (22) is arranged inside the valve body (2); a vent (23) is provided in the middle of the side wall of the ball (22); the ball ( 22) The bottom side wall is fixedly connected with a lower bearing (24); the lower bearing (24) and the valve body (2) are rotatably connected; the middle part of the inner side wall of the valve body (2) is fixedly connected with a valve seat (25); the valve seats (25) are a pair and are symmetrically arranged on both sides of the sphere (22); the valve seats (25) and the sphere (22) are rotatably connected; a plurality of cavities (26) are provided between the valve seat (25) and the valve body (2); the top side wall of the cavity (26) is fixedly connected with an air intake assembly.

3. A natural gas pressure regulating skid according to claim 2, characterized in that: The air intake assembly comprises an air cylinder (3); the air cylinder (3) is arranged above the cavity (26); a piston plate (31) is slidably connected to the middle of the inner side wall of the air cylinder (3); the piston plate (31) and the air cylinder (3) are interference fit; a connecting rod (32) is fixedly connected to the top side wall of the piston plate (31); a connecting pipe (33) is fixedly connected to the middle of the side wall of the air cylinder (3); the air cylinder (3), the connecting pipe (33) and the cavity (26) are all hollow and connected.

4. The natural gas pressure regulating skid according to claim 2, characterized in that: A spring (4) is fixedly connected to the middle of the inner wall of the valve body (2); the springs (4) are a pair and are symmetrically arranged inside the valve body (2); a sealing plate (41) is fixedly connected to the end of the spring (4); the sealing plate (41) and the vent (23) are correspondingly arranged.

5. The natural gas pressure regulating skid according to claim 4, characterized in that: An airbag (5) is fixedly connected to the middle of the side wall of the valve seat (25); the airbag (5) is made of elastic material; the airbag (5) and the cavity (26) are both hollow and connected.

6. The natural gas pressure regulating skid according to claim 2, characterized in that: The rotating assembly comprises a rotating valve (6); the rotating valve (6) is fixedly connected to the side wall of the upper bearing (21).

7. The natural gas pressure regulating skid according to claim 6, characterized in that: An anti-slip pad (7) is fixedly connected to the middle of the side wall of the rotary valve (6); the anti-slip pad (7) is made of elastic material.

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