Flow control valve for fuel gas conveying pressure regulation

Abstract

The invention relates to the related technical field of flow control valves, in particular to a flow control valve for fuel gas conveying pressure regulation, which comprises a switch valve, a pressure regulator and a flow control valve, a gas inlet port of the switch valve is connected with CNG and LNG high-pressure gas sources through a high-pressure hose, a gas inlet end of the pressure regulator is connected with a gas outlet port of the switch valve, and a gas outlet end of the pressure regulator is connected with a gas outlet port of the flow control valve. The pressure regulator comprises a first-stage pressure reducing module and a second-stage pressure reducing module, the connecting position is sealed through a corrugated gasket, and the flow control valve is formed by combining a flow control valve body, a regulating rod, a second sealing ring, a cross recess small pan head screw, an electromagnetic valve and an outlet connector; by arranging the flow control valve which is composed of the switch valve, the pressure regulator and the flow control valve and used for regulating the fuel gas conveying pressure and arranging the first-stage pressure reduction module and the second-stage pressure reduction module on the pressure regulator, the effect of regulating the air pressure in the valve body is effectively improved through the combined action of the first-stage pressure reduction module and the second-stage pressure reduction module; and the fuel gas at the outlet can keep stable and proper working pressure.

Description

Technical Field

[0001] The present invention relates to the technical field related to flow control valves, and in particular to a flow control valve for regulating gas transmission pressure. Background Art

[0002] Gas is a general term for gaseous fuels that can burn and release heat for use by residents and industrial enterprises. There are many types of gas, including natural gas, artificial gas, liquefied petroleum gas, biogas, coal-to-gas, etc. The existing Chinese patent document with the announcement number CN101532527B discloses a pressure-regulating control air valve, which includes a valve body 21, two valve cores 17 disposed within the valve body 21 and press-fitted with a sealing mechanism at the bottom adjacent to the air source chamber 22 and the output air pressure chamber 5. The valve cores 17 have a degassing chamber inside, and an operating mechanism disposed outside the valve body 21 and mated at the bottom end to the top of the valve cores 17. The valve body 21 also includes a pressure valve, which includes a pressure-regulating cover 12 driven by the operating mechanism via a pressure wheel 6, and a hollow pressure-regulating core 14 disposed on the underside of the pressure-regulating cover 12. The lower end of the pressure-regulating core 14 is elastically press-fitted with the sealing mechanism at the adjacent portions of the air source chamber 22 and the output air pressure chamber 5. However, the above scheme adopts a pressure regulating valve, which may easily cause the problem of abnormal gas supply in a low temperature environment, and it adopts a split structure, and the overall application cost is relatively high. Therefore, the present invention proposes a flow control valve for regulating the gas transmission pressure to solve the above problems. Summary of the Invention

[0003] The object of the present invention is to provide a flow control valve for regulating gas transmission pressure, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a flow control valve for regulating gas transmission pressure, comprising: An on-off valve, the air inlet port of which is connected to a CNG or LNG high-pressure gas source through a high-pressure hose; A pressure regulator, wherein the air inlet of the pressure regulator is connected to the air outlet of the switch valve, and the pressure regulator includes a first-stage pressure reducing module and a second-stage pressure reducing module, and the connection position is sealed by a corrugated gasket; A flow control valve, which is composed of a flow control valve body, an adjusting rod, a second sealing ring, a cross-recessed small pan head screw, a solenoid valve, and an outlet connector. The air inlet of the flow control valve is connected to the air outlet of the pressure regulator, and the outlet connector of the flow control valve is connected to the heating equipment through a rubber hose. The pressure regulator is composed of an aluminum shell, a top block, a top block pin, a pull rod, a flat head semi-hollow rivet, a cover plate, a diaphragm, a diaphragm screw, a nut, a spring washer, a diaphragm pad, a support spring, a cross slot large flat head screw, a lever pin, a valve pad seat, a lever, a valve pad, a first sealing ring, a valve port, and a high-pressure spring.

[0005] Preferably, the first-level pressure reducing module and the second-level pressure reducing module are respectively located on the upper and lower sides of the aluminum shell, and the principles of the first-level pressure reducing module and the second-level pressure reducing module are the same, and the first-level pressure reducing module and the second-level pressure reducing module both include a top block, a pull rod, a diaphragm, a diaphragm screw, a nut, a spring washer, a diaphragm pad, and a spring. The springs on the first-level pressure reducing module and the second-level pressure reducing module are respectively a high-pressure spring and a support spring, and the elastic coefficient of the high-pressure spring is greater than the elastic coefficient of the support spring.

[0006] Preferably, the cover plate is fixedly connected to the aluminum shell by a cylindrical head spring washer screw, and a group of cover plates are symmetrically arranged on both sides of the aluminum shell, and the upper and lower side cover plates correspond to the first-level pressure reducing module and the second-level pressure reducing module respectively. The pull rods of the first-level pressure reducing module and the second-level pressure reducing module are respectively arranged in the inner cavity of the upper and lower side cover plates, and the upper and lower side pull rods are both installed with diaphragms through diaphragm screws and nuts, and the inner sides of the nuts are padded with spring washers and diaphragm pads, and the upper spring washer is connected to the upper cover plate structure through a high-pressure spring, and the lower spring washer is connected to the lower cover plate structure through a support spring.

[0007] Preferably, the top block on the first-stage decompression module is rotatably mounted on the aluminum shell through a top block pin, and the pull rod on the first-stage decompression module is hingedly connected to the top block through a flat-head semi-hollow rivet, and the top block on the second-stage decompression module is rotatably connected to the lever through a lever pin, and the valve pad seat is fixed to the lower side end of the lever, and the cavities formed by the diaphragms on the first-stage decompression module and the second-stage decompression module are connected through a valve port, and a first sealing ring is provided on the valve pad.

[0008] Preferably, when the support spring is in a reset state, the valve pad and the first sealing ring form a blocking effect on the port of the valve opening.

[0009] Preferably, a protective cover mounting hole is opened on the aluminum shell, a protective cover is installed at the position of the protective cover mounting hole by positioning screws, and a warning label is fixedly installed on the back of the protective cover, and the warning label is printed with precautions for use of the flow control valve.

[0010] Preferably, the flow control valve body is fixed to the aluminum shell of the pressure regulator by a cross-slot small pan head screw, and a pair of adjusting rod grooves are provided on the flow control valve body, and the adjusting rod grooves on both sides are connected by a connecting groove, the adjusting rod is movably arranged in the adjusting rod groove, and a second sealing ring is provided on the side wall of the adjusting rod groove, and an electromagnetic valve is installed at the upper side position of the adjusting rod groove on the flow control valve body, and the position of the adjusting rod is adjusted by the electromagnetic valve, the outlet joint is connected to the connecting groove, and the position adjustment of the adjusting rod in the adjusting rod groove adjusts the gas flow in the adjusting rod groove, and the flow control valve body is connected with a low-fire flow solenoid valve wire, a medium-fire flow solenoid valve wire and a heater wire, and the low-fire flow solenoid valve wire, the medium-fire flow solenoid valve wire and the heater wire are all connected to the plug-in male buckle.

[0011] Preferably, a heating chamber is provided on the aluminum shell, a heating module is provided in the heating chamber, a sealing cover is provided at the port of the heating chamber, and water is injected into the heating chamber, the heating module is composed of a ceramic tube, a resistance heating wire and a liquid-repelling ring, and a primary mounting plate and a secondary mounting plate are respectively installed at both ends of the ceramic tube, the primary mounting plate is fixed on the inner side of the heating chamber, the secondary mounting plate is connected to the sealing cover, and the primary mounting plate and the secondary mounting plate are both ceramic plates.

[0012] Preferably, the resistance heating wire is arranged in a spiral shape, and a limit ring is fixedly glued on the outer wall of the ceramic tube. The liquid-repelling ring is cast from ferromagnetic material, and the liquid-repelling ring is sleeved on the ceramic tube, and adjacent liquid-repelling rings are separated by limit rings. The resistance heating wire is electrically connected to an AC power supply, and the current direction change interval of the AC power supply is five seconds.

[0013] Preferably, a roller groove is provided on the inner side wall of the liquid-repelling ring, and a roller is rotatably installed in the roller groove through a rotating shaft. Six rollers are arranged at equal intervals on a single liquid-repelling ring, and the rollers are all arranged in contact with the outer side wall of the ceramic tube. An elastic sheet is integrally formed on the outer side wall of the liquid-repelling ring, and the elastic sheet is a tough plastic plate, and the elastic sheet is provided with a circle on the circumference. A liquid-repelling plate is integrally formed on the outer end of the elastic sheet, and the liquid-repelling plate is a circular plate, and both side surfaces of the liquid-repelling plate are concave.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a flow control valve composed of an on-off valve, a pressure regulator and a flow control valve for regulating the gas transmission pressure, and by setting a first-stage pressure reducing module and a second-stage pressure reducing module on the pressure regulator, the combined action of the first-stage pressure reducing module and the second-stage pressure reducing module effectively improves the gas pressure regulation effect inside the valve body, so that the gas at the outlet can maintain a stable and appropriate working pressure; 2. The flow control valve is composed of a flow control valve body, an adjusting rod, a second sealing ring, a cross-slot small pan head screw, a solenoid valve, and an outlet connector. By opening and closing the two solenoid valves respectively, four-speed control is achieved, thereby achieving multi-speed control of the gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the positions of the pressure regulator and flow control valve of the present invention; Figure 3 This is a schematic diagram of the protective cover structure of the present invention; Figure 4 This is a schematic structural diagram of the voltage regulator of the present invention; Figure 5 This is a schematic diagram of the flow control valve structure of the present invention; Figure 6 This is a schematic diagram of the flow control valve structure of the present invention; Figure 7 This is a schematic diagram of the installation position of the heating module of the present invention; Figure 8 for Figure 7 A schematic diagram of the structure at center A; Figure 9 for Figure 8 A magnified schematic diagram of the structure at point B in the middle; Figure 10 This is a schematic diagram of the heating module structure of the present invention; Figure 11 Schematic diagram of the structure of the liquid-repellent ring of the present invention.

[0016] Figure: on-off valve 1, cylindrical head screw with spring washer 2, push rod assembly 3, corrugated washer 4, heater 5, voltage regulator 6, aluminum housing 61, ejector block 62, ejector pin 63, pull rod 64, flat head semi-tubular rivet 66, cover plate 67, diaphragm 68, diaphragm screw 69, nut 610, spring washer 611, diaphragm gasket 612, support spring 613, cross recessed flat head screw 614, lever pin 615, valve seat 616, lever 617, valve Gasket 618, first sealing ring 619, valve port 620, high-pressure spring 621, positioning screw 7, flow control valve 8, flow control valve body 81, adjusting rod 82, second sealing ring 83, cross-slot small pan head screw 84, solenoid valve 85, outlet connector 86, connecting groove 87, protective cover 9, low-fire flow solenoid valve wire 91, medium-fire flow solenoid valve wire 92, heater wire 93, male connector buckle 94, protective cover mounting hole 95, warning label 96. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0018] See also Figure 1-11 The present invention provides the following three preferred embodiments: Example 1

[0019] A flow control valve for regulating gas transmission pressure, comprising a switch valve 1, a pressure regulator 6 and a flow control valve 8. The air inlet port of the switch valve 1 is connected to a CNG or LNG high-pressure gas source through a high-pressure hose. The air inlet end of the pressure regulator 6 is connected to the air outlet port of the switch valve 1. The pressure regulator 6 comprises a first-stage pressure reducing module and a second-stage pressure reducing module, and the connection position is sealed by a corrugated gasket 4. The flow control valve 8 is composed of a flow control valve body 81, an adjusting rod 82, a second sealing ring 83, a cross-slot small pan head screw 84, a solenoid valve 85, and an outlet connector 86. The air inlet of the flow control valve 8 is connected to the outlet port of the switch valve 1. The outlet is connected to the air outlet end of the pressure regulator 6, and the outlet connector 86 of the flow control valve 8 is connected to the heating equipment through a rubber hose. The pressure regulator 6 is composed of an aluminum shell 61, a top block 62, a top block pin 63, a pull rod 64, a flat head semi-hollow rivet 66, a cover plate 67, a diaphragm 68, a diaphragm screw 69, a nut 610, a spring washer 611, a diaphragm pad 612, a support spring 613, a cross-slot large flat head screw 614, a lever pin 615, a valve pad seat 616, a lever 617, a valve pad 618, a first sealing ring 619, a valve port 620, and a high-pressure spring 621.

[0020] The first-stage pressure reducing module and the second-stage pressure reducing module are respectively located on the upper and lower sides of the aluminum shell 61, and the principles of the first-stage pressure reducing module and the second-stage pressure reducing module are the same, and the first-stage pressure reducing module and the second-stage pressure reducing module both include a top block 62, a pull rod 64, a diaphragm 68, a diaphragm screw 69, a nut 610, a spring washer 611, a diaphragm pad 612, and a spring. The springs on the first-stage pressure reducing module and the second-stage pressure reducing module are respectively a high-pressure spring 621 and a support spring 613. The elastic coefficient of the high-pressure spring 621 is greater than the elastic coefficient of the support spring 613. The cover plate 67 is fixedly connected to the aluminum shell 61 by a cylindrical head spring washer screw 2, and the cover plate 67 is in A group of them are symmetrically arranged on both sides of the aluminum shell 61, and the upper and lower side covers 67 correspond to the first-level pressure reducing module and the second-level pressure reducing module respectively. The upper pull rods 64 of the first-level pressure reducing module and the second-level pressure reducing module are respectively arranged in the inner cavity of the upper and lower side covers 67, and the upper and lower pull rods 64 are both installed with diaphragms 68 through diaphragm screws 69 and nuts 610, and the inner sides of the nuts 610 are padded with spring washers 611 and diaphragm washers 612, and the upper spring washer 611 is connected to the upper cover structure through a high-pressure spring 621, and the lower spring washer 611 is connected to the lower cover structure through a support spring 613.

[0021] The top block 62 on the first-stage decompression module is rotatably mounted on the aluminum shell 61 through the top block pin 63, and the pull rod 64 on the first-stage decompression module is hingedly connected to the top block 62 through a flat-head semi-hollow rivet 66. The top block 62 on the second-stage decompression module is rotatably connected to the lever 617 through the lever pin 615. The valve pad seat 616 is fixed to the lower side end of the lever 617. The cavity formed by the diaphragm 68 on the first-stage decompression module and the second-stage decompression module is connected through the valve port 620. A first sealing ring 619 is provided on the valve pad 618. When the support spring 613 is in the reset state, the valve pad 618 and the first sealing ring 619 form a blocking effect on the port of the valve port 620. By setting a flow control valve for regulating the gas delivery pressure composed of a switch valve 1, a pressure regulator 6 and a flow control valve 8, and by setting a first-level pressure reducing module and a second-level pressure reducing module on the pressure regulator 6, the combined action of the first-level pressure reducing module and the second-level pressure reducing module can effectively improve the gas pressure regulation effect inside the valve body, so that the gas at the outlet can maintain a stable and appropriate working pressure. Example 2

[0022] Based on Example 1, a protective cover mounting hole 95 is opened on the aluminum shell 61, and a protective cover 9 is installed at the position of the protective cover mounting hole 95 through a positioning screw 7. A warning label 96 is fixedly installed on the back of the protective cover 9, and the warning label 96 is printed with precautions for use of the flow control valve.

[0023] The flow control valve body 81 is fixed to the aluminum housing 61 of the pressure regulator 6 by a cross-slot small pan head screw 84, and a pair of adjusting rod grooves are provided on the flow control valve body 81, and the adjusting rod grooves on both sides are connected by a connecting groove 87. The adjusting rod 82 is movably set in the adjusting rod groove, and a second sealing ring 83 is provided on the side wall of the adjusting rod groove. The upper side position of the adjusting rod groove on the flow control valve body 81 is installed with a solenoid valve 85, and the adjusting rod 82 is position-adjusted by the solenoid valve 85. The outlet joint 86 is connected to the connecting groove 87, and the position adjustment of the adjusting rod 82 in the adjusting rod groove is proportional to the position of the adjusting rod in the adjusting rod groove. The gas flow rate is adjusted, and the flow control valve body 81 is connected with the low-fire flow solenoid valve wire 91, the medium-fire flow solenoid valve wire 92 and the heater wire 93. The low-fire flow solenoid valve wire 91, the medium-fire flow solenoid valve wire 92 and the heater wire 93 are all connected with the plug-in male buckle 94. By setting the flow control valve 8 to be composed of the flow control valve body 81, the adjustment rod 82, the second sealing ring 83, the cross-slot small pan head screw 84, the solenoid valve 85, and the outlet connector 86, the four-speed control is realized by opening and closing the two solenoid valves 85 respectively, thereby realizing multi-speed control of the gas flow. Example 3

[0024] On the basis of Example 2, a heating chamber 50 is opened on the aluminum shell 61, and a heating module 5 is arranged in the heating chamber 50. A sealing cover 51 is provided at the port of the heating chamber 50, and water is injected into the heating chamber 50. The heating module 5 is composed of a ceramic tube 52, a resistance heating wire 53 and a liquid-repelling ring 54. A first-level mounting plate 55 and a second-level mounting plate are respectively installed at both ends of the ceramic tube 52. The first-level mounting plate 55 is fixed on the inner side of the heating chamber 50, and the second-level mounting plate is connected to the sealing cover 51. The first-level mounting plate 55 and the second-level mounting plate are both ceramic plates. By injecting water into the heating chamber 50 and arranging the heating module 5 therein, the water body is used as a buffer medium, so that the heating temperature can be more accurately controlled, and compared with heating by electric heating plates, it can avoid local excessive temperature.

[0025] The resistance heating wire 53 is arranged in a spiral shape, and a limit ring 56 is fixedly glued to the outer wall of the ceramic tube 52. The liquid-repelling ring 54 is cast from a ferromagnetic material and is sleeved on the ceramic tube 52. Adjacent liquid-repelling rings 54 are separated by limit rings 56. The resistance heating wire 53 is electrically connected to an AC power supply, and the current direction of the AC power supply changes at an interval of five seconds. By arranging the resistance heating wire 53 in a spiral shape and sleeved on the ceramic tube 52, a magnetic field is generated by the power supply of the resistance heating wire 53, and the direction of the magnetic field is changed by switching the current direction, so that the liquid-repelling ring 54 reciprocates along the ceramic tube 52, thereby generating a wave effect on the water body, thereby making the heat distribution of the water body more uniform.

[0026] A roller groove 57 is provided on the inner side wall of the liquid-discharging ring 54, and a roller 59 is rotatably installed in the roller groove 57 through a rotating shaft 58. Six rollers 59 are arranged at equal intervals on a single liquid-discharging ring 54, and the rollers 59 are all arranged in contact with the outer side wall of the ceramic tube 52. The arrangement of the rollers 59 can effectively reduce the resistance to the reciprocating motion of the liquid-discharging ring 54. An elastic sheet 510 is integrally formed on the outer side wall of the liquid-discharging ring 54. The elastic sheet 510 is a tough plastic plate, and the elastic sheet 510 is provided with a circle of equal circumference. A liquid-discharging plate 511 is integrally formed on the outer end of the elastic sheet 510. The liquid-discharging plate 511 is a circular plate, and both side surfaces of the liquid-discharging plate 511 are concave. The arrangement of the elastic sheet 510 and the liquid-discharging plate 511 further improves the fluctuation effect on the water body.

[0027] Working principle: when the gas consumption at the outlet of the pressure regulator 6 increases, the pressure at the outlet decreases, and the pressure on the diaphragm 68 in the cavity is less than the pressure of the spring below, the diaphragm 68 will rise, the lever will act, and at this time the valve port 620 will open, and the gas at the inlet end will enter the inner cavity through the valve port 620. When the pressure in the cavity increases, the pressure of the gas in the inner cavity on the diaphragm 68 is greater than the spring pressure, the diaphragm 68 will drop, driving the lever 617 to act, closing the valve port 620, stopping the air intake, and the automatic opening and closing of the valve port 620 ensures a stable gas pressure at the outlet. The screwing depth of the two adjusting rods 82 in the flow control valve 8 can obtain two different flow rates on the left and right sides, the left side has a small flow rate, and the right side has a large flow rate. The left solenoid valve 5 works alone, the internal air path is opened, and a small flow rate is obtained. The right solenoid valve 5 works alone to obtain a medium flow rate. The two solenoid valves 5 work at the same time to obtain a large flow rate, thus realizing the switching of different flow gears.

[0028] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A flow control valve for regulating gas transmission pressure, Features: include: An on-off valve (1), wherein an air inlet port of the on-off valve (1) is connected to a CNG or LNG high-pressure gas source via a high-pressure hose; A pressure regulator (6), wherein the air inlet end of the pressure regulator (6) is connected to the air outlet port of the switch valve (1), and the pressure regulator (6) comprises a primary pressure reducing module and a secondary pressure reducing module, and the connection position is sealed by a corrugated gasket (4); A flow control valve (8), the flow control valve (8) being composed of a flow control valve body (81), an adjusting rod (82), a second sealing ring (83), a cross-recessed small pan head screw (84), a solenoid valve (85), and an outlet connector (86); an air inlet of the flow control valve (8) is connected to an air outlet end of the pressure regulator (6), and an outlet connector (86) of the flow control valve (8) is connected to the heating device via a rubber hose; The voltage regulator (6) is composed of an aluminum shell (61), a top block (62), a top block pin (63), a pull rod (64), a flat head semi-hollow rivet (66), a cover plate (67), a diaphragm (68), a diaphragm screw (69), a nut (610), a spring washer (611), a diaphragm pad (612), a support spring (613), a cross-slotted large flat head screw (614), a lever pin (615), a valve pad seat (616), a lever (617), a valve pad (618), a first sealing ring (619), a valve port (620), and a high-pressure spring (621).

2. A flow control valve for regulating gas transmission pressure according to claim 1, Features: The first-stage decompression module and the second-stage decompression module are respectively located on the upper and lower sides of the aluminum shell (61), and the first-stage decompression module and the second-stage decompression module have the same principle, and both the first-stage decompression module and the second-stage decompression module include a top block (62), a pull rod (64), a diaphragm (68), a diaphragm screw (69), a nut (610), a spring washer (611), a diaphragm pad (612), and a spring. The springs on the first-stage decompression module and the second-stage decompression module are respectively a high-pressure spring (621) and a support spring (613), and the elastic coefficient of the high-pressure spring (621) is greater than the elastic coefficient of the support spring (613).

3. A flow control valve for regulating gas transmission pressure according to claim 2, Features: The cover plate (67) is fixedly connected to the aluminum shell (61) by means of cylindrical head spring washer screws (2), and a group of cover plates (67) are symmetrically arranged on both sides of the aluminum shell (61), and the upper and lower cover plates (67) correspond to the first-stage pressure reducing module and the second-stage pressure reducing module respectively. The pull rods (64) on the first-stage pressure reducing module and the second-stage pressure reducing module are respectively arranged in the inner cavities of the upper and lower cover plates (67), and the upper and lower pull rods (64) are both installed with diaphragms (68) by means of diaphragm screws (69) and nuts (610), and the inner sides of the nuts (610) are both padded with spring washers (611) and diaphragm washers (612), and the upper spring washers (611) are connected to the upper cover plate structure by means of high-pressure springs (621), and the lower spring washers (611) are connected to the lower cover plate structure by means of support springs (613).

4. A flow control valve for regulating gas transmission pressure according to claim 3, Features: The top block (62) on the primary decompression module is rotatably mounted on the aluminum shell (61) via a top block pin (63), and the pull rod (64) on the primary decompression module is hingedly connected to the top block (62) via a flat-head semi-hollow rivet (66). The top block (62) on the secondary decompression module is rotatably connected to a lever (617) via a lever pin (615). The valve pad seat (616) is fixed to the lower side end of the lever (617). The cavities enclosed by the diaphragms (68) on the primary and secondary decompression modules are connected via a valve port (620), and a first sealing ring (619) is provided on the valve pad (618).

5. A flow control valve for regulating gas transmission pressure according to claim 4, Features: When the support spring (613) is in a reset state, the valve pad (618) and the first sealing ring (619) form a blocking effect on the port of the valve opening (620).

6. A flow control valve for regulating gas transmission pressure according to claim 5, Features: The aluminum housing (61) is provided with a protective cover mounting hole (95), a protective cover (9) is mounted at the position of the protective cover mounting hole (95) via positioning screws (7), a warning label (96) is fixedly mounted on the back of the protective cover (9), and the warning label (96) is printed with precautions for use of the flow control valve.

7. A flow control valve for regulating gas transmission pressure according to claim 6, Features: The flow control valve body (81) is fixed to the aluminum housing (61) of the pressure regulator (6) by means of a cross-slot small pan head screw (84), and a pair of adjusting rod grooves are provided on the flow control valve body (81), and the adjusting rod grooves on both sides are connected by means of a connecting groove (87), the adjusting rod (82) is movably arranged in the adjusting rod groove, and a second sealing ring (83) is provided on the side wall of the adjusting rod groove, and a solenoid valve (85) is installed on the upper side of the adjusting rod groove on the flow control valve body (81), and the adjusting rod (82) is connected to the solenoid valve (85) by means of the solenoid valve (87). 85) for position adjustment, the outlet joint (86) is connected to the connecting groove (87), and the position adjustment of the adjusting rod (82) in the adjusting rod groove adjusts the gas flow in the adjusting rod groove, and the flow control valve body (81) is connected with a low-fire flow solenoid valve wire (91), a medium-fire flow solenoid valve wire (92) and a heater wire (93), and the low-fire flow solenoid valve wire (91), the medium-fire flow solenoid valve wire (92) and the heater wire (93) are all connected to the male plug buckle (94).

8. A flow control valve for regulating gas transmission pressure according to claim 7, Features: The aluminum shell (61) is provided with a heating chamber (50), a heating module (5) is arranged in the heating chamber (50), a sealing cover (51) is arranged at the port of the heating chamber (50), and water is injected into the heating chamber (50), the heating module (5) is composed of a ceramic tube (52), a resistance heating wire (53) and a liquid-discharging ring (54), and a primary mounting plate (55) and a secondary mounting plate are respectively installed at both ends of the ceramic tube (52), the primary mounting plate (55) is fixed on the inner side surface of the heating chamber (50), and the secondary mounting plate is connected to the sealing cover (51), and the primary mounting plate (55) and the secondary mounting plate are both ceramic plates.

9. A flow control valve for regulating gas transmission pressure according to claim 8, Features: The resistance heating wire (53) is arranged in a spiral shape, and a limit ring (56) is fixedly glued to the outer wall of the ceramic tube (52). The liquid-repelling ring (54) is cast from a ferromagnetic material, and the liquid-repelling ring (54) is sleeved on the ceramic tube (52), and adjacent liquid-repelling rings (54) are separated by the limit ring (56). The resistance heating wire (53) is electrically connected to an AC power supply, and the current direction of the AC power supply changes at an interval of five seconds.

10. A flow control valve for regulating gas transmission pressure according to claim 9, Features: A roller groove (57) is provided on the inner side wall of the liquid-discharging ring (54), and a roller (59) is rotatably mounted in the roller groove (57) via a rotating shaft (58). Six rollers (59) are arranged at equal intervals on a single liquid-discharging ring (54), and the rollers (59) are arranged in contact with the outer side wall of the ceramic tube (52). An elastic sheet (510) is integrally formed on the outer side wall of the liquid-discharging ring (54), and the elastic sheet (510) is a tough plastic sheet, and the elastic sheet (510) is arranged in a circle around the circumference. A liquid-discharging plate (511) is integrally formed on the outer end of the elastic sheet (510), and the liquid-discharging plate (511) is a circular plate, and both side surfaces of the liquid-discharging plate (511) are arranged in a concave manner.

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