Gas pressure regulator with filtering function

Abstract

The invention discloses a fuel gas pressure regulator with a filtering function, which comprises a pressure regulator whole body, the pressure regulator whole body comprises a pressure regulator assembly and a fuel gas filtering pipe, fuel gas enters an ultrafiltration membrane through a gas inlet pipe, the fuel gas is filtered through the ultrafiltration membrane, fine dust in the fuel gas is remained in the ultrafiltration membrane, and the fuel gas is filtered through the filter pipe. Filtered fuel gas penetrates through holes of an ultrafiltration membrane to be discharged into a fuel gas filtering cavity, the fuel gas is discharged from the middle of a plastic hot melting pipe close to a gas outlet pipe and conveyed into a pressure regulator assembly, effective filtering of the fuel gas is achieved, when the fuel gas is conveyed, the flowing pressure of the fuel gas blows a wind wheel on a rotating shaft to rotate, the rotating shaft is controlled to rotate, and the fuel gas is discharged into the fuel gas filtering cavity. And dust particles adsorbed in the ultrafiltration membrane can be vibrated, the dust particles in fuel gas are prevented from being continuously adsorbed on the inner wall of the ultrafiltration membrane, holes in the ultrafiltration membrane are prevented from being blocked for a long time, the fuel gas filtering effect of the ultrafiltration membrane is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pressure regulators, and specifically to a gas pressure regulator with a filtering function. Background Technique

[0002] A gas pressure regulator is commonly known as a pressure reducing valve and is also called a gas pressure regulating valve. It is a device that automatically changes the gas flow rate through a regulating valve to keep the outlet gas at a specified pressure. The most important function of the pressure regulator is to maintain a stable pressure during the use of the gas, so as to ensure a stable fuel-air ratio for the gas. During the extraction and storage and transportation of natural gas, it is inevitable to mix in solid particle impurities, water, and light hydrocarbon pollutants. Before transporting the gas, these impurities need to be removed.

[0003] In the prior art, during the transportation process after gas treatment, the gas still contains some tiny particulate dust. If these pollutants are not removed, they will enter the interior of the gas pressure regulator during the gas transportation process, which will affect the accuracy of metering. There is no filtering component installed in the existing gas pressure regulators to filter the gas. After a long time of gas transportation, it will even block the pressure regulator, making the gas pressure regulator unable to be used normally and even causing safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas pressure regulator with a filtering function to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A gas pressure regulator with a filtering function, including the overall pressure regulator. The overall pressure regulator includes a pressure regulator component and a gas filtering pipe. The pressure regulator component is fixedly connected to the gas filtering pipe. A gas filtering cavity is provided in the middle of the gas filtering pipe. Plastic hot melt pipes are installed at both ends of the gas filtering cavity. Ultrafiltration membranes are fixedly installed in a circumferential array around the central axis of the plastic hot melt pipes between the two plastic hot melt pipes. Connecting rods are fixedly installed in a circumferential array around the central axis of the plastic hot melt pipes at the middle position between the two plastic hot melt pipes. One end of the ultrafiltration membrane is fixedly embedded with one of the plastic hot melt pipes, and the other end of the ultrafiltration membrane passes through the other plastic hot melt pipe and is fixedly embedded with the plastic hot melt pipe. A rotating shaft is rotatably installed in the middle of one of the plastic hot melt pipes. A wind wheel is fixedly installed at one end of the rotating shaft, and a striking bar is fixedly installed at the other end of the rotating shaft.

[0006] As a further optimization of this technical solution, a mounting bracket is hermetically installed in the middle of the plastic hot-melt pipe with the rotating shaft installed thereon. On one side of the middle of the plastic hot-melt pipe with the mounting bracket installed, mounting grooves are annularly and arrayedly formed around the central axis of the plastic hot-melt pipe. On the mounting bracket, mounting blocks are fixedly installed annularly and arrayedly around the central axis of the mounting bracket. The mounting blocks are slidably installed in the mounting grooves. The rotating shaft is rotationally installed in the middle of the mounting bracket through mechanical seals.

[0007] As a further optimization of this technical solution, intake pipes and outlet pipes are respectively fixedly installed at both ends of the gas filtration pipe. At the ends of the intake pipes and outlet pipes far away from the gas filtration pipe, connecting flanges are fixedly installed. The connecting flanges, the gas filtration pipe, the intake pipes and the outlet pipes are all divided into two parts along the middle horizontal plane. A bolt seat is integrally and fixedly installed in the middle of the outer side of the gas filtration pipe. The two parts of the connecting flanges, the gas filtration pipe, the intake pipes and the outlet pipes are fixedly connected by bolts.

[0008] As a further optimization of this technical solution, the radius of the gas filtration cavity is larger than that of the intake pipe and the outlet pipe.

[0009] As a further optimization of this technical solution, sealing grooves are formed at the contact surface positions between the two parts of the connecting flanges, the gas filtration pipe, the intake pipes and the outlet pipes, and first sealing gaskets are installed inside the sealing grooves.

[0010] As a further optimization of this technical solution, rotating plates are rotationally installed annularly and arrayedly around the central axis of the plastic hot-melt pipe on one side of the middle of the plastic hot-melt pipe with the mounting bracket installed. Slide holes are formed at the ends of the rotating plates. Positioning rods are slidably installed inside the slide holes. On the outer side of one end of the positioning rod, a compression spring is sleeved. One end of the compression spring is fixedly connected to one end of the positioning rod, and the other end of the compression spring is fixedly connected to one side of the rotating plate. Positioning holes are formed in the middle of the mounting blocks, and the positioning holes are slidably inserted with the positioning rods.

[0011] As a further optimization of this technical solution, positioning blocks are symmetrically and fixedly installed on the inner wall of the gas filtration pipe. Positioning card slots are symmetrically formed on the outer side of the plastic hot-melt pipe. The positioning card slots are slidably inserted with the positioning blocks. A second sealing gasket is installed at one side position of the end of the plastic hot-melt pipe close to the gas filtration cavity.

[0012] As a further optimization of this technical solution, rounded corner jacks are symmetrically formed on one side of the plastic hot-melt pipe corresponding to the second sealing gasket. At the end position of the pressure regulator assembly corresponding to the rounded corner jacks, receiving holes are formed. Rounded corner insertion rods are slidably installed inside the receiving holes. A return spring is fixedly installed at one end of the rounded corner insertion rod, and the return spring is arranged inside the receiving hole.

[0013] The present invention provides a gas pressure regulator with a filtering function, having the following beneficial effects:

[0014] (1) In the present invention, gas is transported through a gas pipeline. The gas will enter the gas filtering chamber through the intake pipe. Blocked by the plastic heat fusion pipe near one end of the intake pipe, the gas can only enter the interior of the ultrafiltration membrane. The gas is filtered by the ultrafiltration membrane, and the fine dust in the gas will remain inside the ultrafiltration membrane. The filtered gas will pass through the pores of the ultrafiltration membrane and be discharged into the interior of the gas filtering chamber. The gas will be discharged from the middle of the plastic heat fusion pipe near the outlet pipe and transported into the pressure regulator assembly, achieving effective filtration of the gas.

[0015] (2) When the present invention transports gas through a gas pipeline, the flowing pressure of the gas will blow the wind wheel on the rotating shaft to rotate, which will control the rotation of the rotating shaft. Then, the striking bar on the rotating shaft will strike the ultrafiltration membrane, which can vibrate the dust particles adsorbed inside the ultrafiltration membrane, prevent the dust particles in the gas from continuously adsorbing on the inner wall of the ultrafiltration membrane, prevent the pores on the ultrafiltration membrane from being blocked for a long time, improve the filtering effect of the ultrafiltration membrane on the gas, and extend the service life of the device. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the partial structure of the present invention;

[0018] Figure 3 is a schematic diagram of the sectional structure of the gas filtering pipe of the present invention;

[0019] Figure 4 is a schematic diagram of the sectional exploded structure of the gas filtering pipe of the present invention;

[0020] Figure 5 is a schematic diagram of the sectional structure of the gas filtering pipe of the present invention;

[0021] Figure 6 is a schematic diagram of the sectional exploded structure of the gas filtering pipe of the present invention;

[0022] Figure 7 is a schematic diagram of the partial exploded structure of the present invention;

[0023] Figure 8 is a schematic diagram of the partial sectional exploded structure of the present invention;

[0024] In the figure: 1. The overall voltage regulator; 2. The voltage regulator component; 3. The gas filtration chamber; 4. The plastic hot melt pipe; 5. The ultrafiltration membrane; 6. The connecting rod; 7. The rotating shaft; 8. The wind wheel; 9. The striking bar; 10. The mounting bracket; 11. The mounting groove; 12. The mounting block; 13. The intake pipe; 14. The outlet pipe; 15. The connecting flange; 16. The bolt seat; 17. The sealing groove; 18. The first gasket; 19. The rotating plate; 20. The sliding hole; 21. The positioning rod; 22. The compression spring; 23. The positioning hole; 24. The positioning block; 25. The positioning card slot; 26. The second gasket; 27. The rounded corner socket; 28. The storage hole; 29. The rounded corner plug; 30. The return spring; 31. The gas filtration pipe. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] The present invention provides a technical solution: As Figures 1 to 8As shown in the figure, in this embodiment, a gas pressure regulator with a filtering function includes an overall pressure regulator 1. The overall pressure regulator 1 includes a pressure regulator assembly 2 and a gas filtering pipe 31. The pressure regulator assembly 2 is fixedly connected to the gas filtering pipe 31. The structure and operating principle of the pressure regulator assembly 2 are the same as those of an existing gas pressure regulator. A gas filtering chamber 3 is provided in the middle of the gas filtering pipe 31. Plastic hot-melt pipes 4 are installed at both ends of the gas filtering chamber 3. A perforation is provided in the middle of the plastic hot-melt pipe 4 for the passage of gas. Ultrafiltration membranes 5 are fixedly installed between the two plastic hot-melt pipes 4 in an annular array with the central axis of the plastic hot-melt pipe 4 as the axis. The ultrafiltration membranes 5 are made of UHP material. Connecting rods 6 are fixedly installed between the two plastic hot-melt pipes 4 in an annular array with the central axis of the plastic hot-melt pipe 4 as the axis. One end of the ultrafiltration membrane 5 is fixedly installed by inlaying with one of the plastic hot-melt pipes 4. The other end of the ultrafiltration membrane 5 passes through the other plastic hot-melt pipe 4 and is fixedly installed by inlaying with the plastic hot-melt pipe 4. When producing the plastic hot-melt pipe 4 and the ultrafiltration membrane 5, a number of ultrafiltration membranes 5 are arranged in an annular array, and the plastic hot-melt pipe 4 is formed by casting through a thermoplastic process. A plastic hot-melt pipe 4 is cast on the outside of one end of a number of ultrafiltration membranes 5 to realize the fixation of one of the plastic hot-melt pipes 4 and one end of the ultrafiltration membrane 5. At the same time, a plastic hot-melt pipe 4 is cast on the outside of the other ends of a number of ultrafiltration membranes 5 to realize the fixation of the other plastic hot-melt pipe 4 and one end of the ultrafiltration membrane 5. One end of this plastic hot-melt pipe 4 does not block the end of the ultrafiltration membrane 5. The open end of the ultrafiltration membrane 5 faces the gas inlet end. A rotating shaft 7 is rotatably installed in the middle of one of the plastic hot-melt pipes 4. A wind wheel 8 is fixedly installed at one end of the rotating shaft 7. A striking bar 9 is fixedly installed at the other end of the rotating shaft 7. The gas is transported through a gas pipeline. The gas will enter the gas filtering chamber 3. Blocked by the plastic hot-melt pipe 4, the gas will only enter the inside of the ultrafiltration membrane 5. The gas is filtered by the ultrafiltration membrane 5. Fine dust in the gas will remain inside the ultrafiltration membrane 5. The filtered gas will pass through the holes of the ultrafiltration membrane 5 and be discharged into the gas filtering chamber 3. The filtered gas will be transported into the pressure regulator assembly 2 to realize the effective filtering of the gas. When the gas is transported through the gas pipeline, the flowing pressure of the gas will blow the wind wheel 8 on the rotating shaft 7 to rotate, which will control the rotation of the rotating shaft 7, and then drive the striking bar 9 on the rotating shaft 7 to strike the ultrafiltration membrane 5, which can vibrate the dust particles adsorbed inside the ultrafiltration membrane 5, prevent the dust particles in the gas from continuously adsorbing on the inner wall of the ultrafiltration membrane 5, prevent the holes on the ultrafiltration membrane 5 from being blocked for a long time, improve the filtering effect of the ultrafiltration membrane 5 on the gas, and improve the service life of this device.

[0027] As Figures 1 to 8As shown in the figure, a mounting bracket 10 is hermetically mounted in the middle of the plastic hot-melt pipe 4 on which the rotating shaft 7 is installed. An installation groove 11 is formed in an annular array on one side of the middle part of the plastic hot-melt pipe 4 on which the mounting bracket 10 is installed, with the central axis of the plastic hot-melt pipe 4 as the axis. On the mounting bracket 10, mounting blocks 12 are fixedly installed in an annular array with the central axis of the mounting bracket 10 as the axis. The mounting blocks 12 are slidably installed in the installation grooves 11, and the rotating shaft 7 is rotationally installed in the middle of the mounting bracket 10 through mechanical seals.

[0028] When assembling the mounting bracket 10 and the plastic hot-melt pipe 4, the mounting blocks 12 on the mounting bracket 10 are installed inside the installation grooves 11 on the plastic hot-melt pipe 4 for positioning and assembling the mounting bracket 10.

[0029] As Figures 1 to 8 As shown in the figure, intake pipes 13 and outlet pipes 14 are integrally formed at both ends of the gas filtration pipe 31 respectively. Connection flanges 15 are integrally formed at the ends of the intake pipes 13 and outlet pipes 14 far from the gas filtration pipe 31. The connection flanges 15, the gas filtration pipe 31, the intake pipes 13 and the outlet pipes 14 are all arranged in two parts along the middle horizontal plane. A bolt seat 16 is integrally and fixedly installed in the middle of the outer side of the gas filtration pipe 31. The two parts of the connection flanges 15, the gas filtration pipe 31, the intake pipes 13 and the outlet pipes 14 are fixedly connected by bolts. The connection flange 15 on the intake pipe 13 is fixedly connected to the gas transmission pipeline by bolts, and the connection flange 15 on the outlet pipe 14 is fixedly connected to the intake end of the pressure regulator assembly 2 by bolts.

[0030] By arranging the connection flanges 15, the gas filtration pipe 31, the intake pipes 13 and the outlet pipes 14 in two parts along the middle horizontal plane, the connection flanges 15, the gas filtration pipe 31, the intake pipes 13 and the outlet pipes 14 can be separated, which is convenient for installing and replacing the ultrafiltration membrane 5.

[0031] As Figures 1 to 8 As shown in the figure, the radius of the gas filtration chamber 3 is larger than that of the intake pipes 13 and the outlet pipes 14.

[0032] Under the pressure of the gas, the flow velocity of the same volume of gas in the pipeline and the intake pipes 13 and the outlet pipes 14 is relatively fast. When the high-pressure gas enters the ultrafiltration membrane 5 and the gas is filtered by the ultrafiltration membrane 5, due to the limitation of the pressure difference inside and outside the ultrafiltration membrane 5, the pressure of the same volume of gas passing through the ultrafiltration membrane 5 is relatively small. By setting the radius of the gas filtration chamber 3 to be larger than that of the intake pipes 13 and the outlet pipes 14, the pressure difference between the ultrafiltration membrane 5 and the rest of the pipeline can be neutralized to achieve stable gas transmission.

[0033] As Figures 1 to 8As shown, a sealing groove 17 is provided at the contact surface position between two parts of the connecting flange 15, the gas filtering pipe 31, the air inlet pipe 13 and the air outlet pipe 14, and a first sealing gasket 18 is installed inside the sealing groove 17.

[0034] When assembling two parts of the connecting flange 15, the gas filtering pipe 31, the air inlet pipe 13 and the air outlet pipe 14, by installing the first sealing gasket 18 inside the sealing groove 17, the two parts of the connecting flange 15, the gas filtering pipe 31, the air inlet pipe 13 and the air outlet pipe 14 can be sealed to prevent gas leakage.

[0035] As Figures 1 to 8 shown, on one side of the middle part of the plastic hot-melt pipe 4 equipped with the mounting bracket 10, a rotating plate 19 is rotatably installed in an annular array around the central axis of the plastic hot-melt pipe 4. A sliding hole 20 is provided at the end of the rotating plate 19, and a positioning rod 21 is slidably installed inside the sliding hole 20. One end of the positioning rod 21 is sleeved with a compression spring 22. One end of the compression spring 22 is fixedly connected to one end of the positioning rod 21, and the other end of the compression spring 22 is fixedly connected to one side of the rotating plate 19. A positioning hole 23 is provided in the middle of the mounting block 12, and the positioning hole 23 is slidably inserted with the positioning rod 21.

[0036] When hermetically installing the mounting bracket 10 in the middle of the plastic hot-melt pipe 4, rotate the rotating plate 19 to drive the positioning rod 21 on the rotating plate 19 to move to the position of the positioning hole 23 of the corresponding mounting block 12. By pulling the end of the positioning rod 21 by the compression spring 22, the positioning rod 21 can be driven to slide inside the sliding hole 20 and the positioning rod 21 can be inserted into the positioning hole 23 to fix the installation position of the mounting bracket 10. When disassembling the mounting bracket 10, by pulling the end of the positioning rod 21, the positioning rod 21 slides reversely inside the sliding hole 20 and the positioning rod 21 slides out of the positioning hole 23, and then rotate the rotating plate 19 to cancel the positioning of the rotating plate 19 and the positioning rod 21 on the mounting block 12 of the mounting bracket 10, and the mounting bracket 10 can be removed from the plastic hot-melt pipe 4.

[0037] As Figures 1 to 8 shown, positioning blocks 24 are symmetrically and fixedly installed on the inner wall of the gas filtering pipe 31, positioning slots 25 are symmetrically provided on the outer side of the plastic hot-melt pipe 4, the positioning slots 25 are slidably inserted with the positioning blocks 24, and a second sealing gasket 26 is installed on one side of the end of the plastic hot-melt pipe 4 close to the gas filtering cavity 3.

[0038] When installing two plastic hot-melt pipes 4 inside the gas filtration chamber 3, by inserting the positioning block 24 on the inner wall of the gas filtration pipe 31 into the positioning slot 25 on the outer side of the plastic hot-melt pipe 4, one end of the plastic hot-melt pipe 4 can be controlled to fit the inner wall of the end of the gas filtration chamber 3. The second gasket 26 on the plastic hot-melt pipe 4 can seal the plastic hot-melt pipe 4 at the position of the intake pipe 13 and the inner wall of the end of the gas filtration chamber 3, so as to control that the gas can only flow through the ultrafiltration membrane 5.

[0039] As Figures 1 to 8 shown, on one side of the plastic hot-melt pipe 4 corresponding to the second gasket 26, rounded-corner jacks 27 are symmetrically opened. At the end position of the pressure regulator assembly 2 corresponding to the position of the rounded-corner jacks 27, receiving holes 28 are opened. Inside the receiving holes 28, rounded-corner inserting rods 29 are slidably installed. One end of the rounded-corner inserting rod 29 is fixedly installed with a return spring 30, and the return spring 30 is arranged inside the receiving hole 28.

[0040] During the process of installing the plastic hot-melt pipe 4 inside the gas filtration pipe 31, the outer wall of the plastic hot-melt pipe 4 will squeeze one end of the rounded corner of the rounded-corner inserting rod 29, driving the rounded-corner inserting rod 29 to slide into the inside of the receiving hole 28. At this time, the return spring 30 is in a compressed state. When the rounded-corner jack 27 corresponds to the rounded-corner inserting rod 29, the pushing of the return spring 30 on the rounded-corner inserting rod 29 will drive the rounded-corner end of the rounded-corner inserting rod 29 to insert into the rounded-corner jack 27, which can realize the positioning of the plastic hot-melt pipe 4, and can perform a certain positioning of the plastic hot-melt pipe 4 inside the plastic hot-melt pipe 4 to prevent the plastic hot-melt pipe 4 from rotating inside the gas filtration pipe 31. When taking out the plastic hot-melt pipe 4 connected to the ultrafiltration membrane 5 from the gas filtration pipe 31, the rounded corner of the rounded-corner jack 27 can squeeze the rounded corner of the rounded-corner inserting rod 29, driving the rounded-corner inserting rod 29 to slide out of the rounded-corner jack 27.

[0041] The present invention provides a gas pressure regulator with a filtering function, and the specific working principle is as follows:

[0042] When the device is in use, the gas is transported through the gas pipeline. The gas will enter the gas filtration chamber 3 through the intake pipe 13. Blocked by the plastic hot-melt pipe 4 at the end near the intake pipe 13, the gas will only enter the ultrafiltration membrane 5. The gas is filtered by the ultrafiltration membrane 5, and the fine dust in the gas will remain inside the ultrafiltration membrane 5. The filtered gas will pass through the holes of the ultrafiltration membrane 5 and be discharged into the gas filtration chamber 3. The gas will be discharged from the middle of the plastic hot-melt pipe 4 near the outlet pipe 14 and transported into the pressure regulator assembly 2, realizing the effective filtration of the gas;

[0043] When transporting gas through a gas pipeline, the flowing pressure of the gas will blow the wind wheel 8 on the rotating shaft 7 to rotate, which will control the rotation of the rotating shaft 7, and then drive the striking bar 9 on the rotating shaft 7 to strike the ultrafiltration membrane 5, which can vibrate the dust particles adsorbed inside the ultrafiltration membrane 5, prevent the dust particles in the gas from continuously adsorbing on the inner wall of the ultrafiltration membrane 5, prevent the pores on the ultrafiltration membrane 5 from being blocked for a long time, improve the filtering effect of the ultrafiltration membrane 5 on the gas, and extend the service life of the device.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas pressure regulator with a filtering function, characterized in that: It includes the overall pressure regulator (1), and the overall pressure regulator (1) includes a pressure regulator assembly (2) and a gas filter pipe (31). The pressure regulator assembly (2) is fixedly connected to the gas filter pipe (31). A gas filter chamber (3) is provided in the middle of the gas filter pipe (31). Plastic hot-melt pipes (4) are installed at both ends of the gas filter chamber (3). Ultrafiltration membranes (5) are fixedly installed in an annular array around the central axis of the plastic hot-melt pipes (4) between the two plastic hot-melt pipes (4). Connecting rods (6) are fixedly installed in an annular array around the central axis of the plastic hot-melt pipes (4) at the middle position between the two plastic hot-melt pipes (4). One end of the ultrafiltration membrane (5) is fixedly installed by embedding with one of the plastic hot-melt pipes (4), and the other end of the ultrafiltration membrane (5) passes through the other plastic hot-melt pipe (4) and is fixedly installed by embedding with the plastic hot-melt pipe (4). A rotating shaft (7) is rotatably installed in the middle of one of the plastic hot-melt pipes (4). A wind wheel (8) is fixedly installed at one end of the rotating shaft (7), and a striking bar (9) is fixedly installed at the other end of the rotating shaft (7).

2. The gas pressure regulator with a filtering function according to claim 1, wherein: A mounting frame (10) is hermetically installed in the middle of the plastic hot-melt pipe (4) where the rotating shaft (7) is installed. Mounting grooves (11) are provided in an annular array around the central axis of the plastic hot-melt pipe (4) at one side position in the middle of the plastic hot-melt pipe (4) where the mounting frame (10) is installed. Mounting blocks (12) are fixedly installed in an annular array around the central axis of the mounting frame (10) on the mounting frame (10). The mounting blocks (12) are slidably installed in the mounting grooves (11). The rotating shaft (7) is rotatably installed in the middle of the mounting frame (10) through mechanical sealing.

3. A gas pressure regulator with a filtering function according to claim 1, characterized in that: An intake pipe (13) and an outlet pipe (14) are respectively fixedly installed at both ends of the gas filter pipe (31). Connecting flanges (15) are fixedly installed at the ends of the intake pipe (13) and the outlet pipe (14) away from the gas filter pipe (31). The connecting flanges (15), the gas filter pipe (31), the intake pipe (13) and the outlet pipe (14) are all divided into two parts along the middle horizontal plane. A bolt seat (16) is integrally and fixedly installed in the middle of the outer side of the gas filter pipe (31). The two parts of the connecting flanges (15), the gas filter pipe (31), the intake pipe (13) and the outlet pipe (14) are fixedly connected by bolts.

4. A gas pressure regulator with a filtering function according to claim 3, characterized in that: The radius of the gas filter chamber (3) is larger than that of the intake pipe (13) and the outlet pipe (14).

5. The gas pressure regulator with a filtering function according to claim 4, characterized in that: Sealing grooves (17) are provided at the contact surface positions between the two parts of the connecting flanges (15), the gas filter pipe (31), the intake pipe (13) and the outlet pipe (14). A first sealing gasket (18) is installed inside the sealing grooves (17).

6. The gas pressure regulator with a filtering function according to claim 2, characterized in that: On one side of the middle part of the plastic hot-melt pipe (4) installed with the mounting bracket (10), a rotating plate (19) is rotatably installed in an annular array with the central axis of the plastic hot-melt pipe (4) as the axis. A sliding hole (20) is opened at the end of the rotating plate (19). A positioning rod (21) is slidably installed inside the sliding hole (20). A compression spring (22) is sleeved on the outer side of one end of the positioning rod (21). One end of the compression spring (22) is fixedly connected to one end of the positioning rod (21), and the other end of the compression spring (22) is fixedly connected to one side of the rotating plate (19). A positioning hole (23) is opened in the middle of the mounting block (12), and the positioning hole (23) is slidably inserted with the positioning rod (21).

7. A gas pressure regulator with a filtering function according to claim 1, characterized in that: Positioning blocks (24) are symmetrically and fixedly installed on the inner wall of the gas filter pipe (31). Positioning grooves (25) are symmetrically opened on the outer side of the plastic hot-melt pipe (4). The positioning grooves (25) are slidably inserted with the positioning blocks (24). A second sealing gasket (26) is installed on one side of the end of the plastic hot-melt pipe (4) close to the gas filtering cavity (3).

8. The gas pressure regulator with a filtering function according to claim 7, characterized in that: Round-corner insertion holes (27) are symmetrically opened on one side of the plastic hot-melt pipe (4) corresponding to the second sealing gasket (26). A receiving hole (28) is opened at the end position of the pressure regulator assembly (2) corresponding to the round-corner insertion hole (27). A round-corner insertion rod (29) is slidably installed inside the receiving hole (28). A return spring (30) is fixedly installed at one end of the round-corner insertion rod (29), and the return spring (30) is arranged inside the receiving hole (28).

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