CNG (compressed natural gas) integrated control valve with double gas filling ports

Abstract

The CNG integrated control valve comprises a main valve body, and a first ventilation penetrating through hole which extends leftwards and rightwards and extends out of the left end and the right end of the main valve body is formed in the middle of the upper portion of the main valve body. A first gas cylinder inflation connector and a second gas cylinder inflation connector are in threaded connection with internal threads formed at the two ends of the first ventilation penetrating through hole correspondingly; the left portion and the right portion of the middle of the main valve body are each provided with an air-entrapping connecting through hole penetrating front and back, the two air inflation valve seats are inserted into the corresponding air-entrapping connecting through holes in a sleeved mode, an outer through hole transversely extending outwards is formed in the middle of the outer side of each air-entrapping connecting through hole, and a vertical hole vertically extending upwards is formed in the middle of each outer through hole. And the bottom ends of the vertical holes are communicated with the corresponding outer through holes. The double-air-entrapping device is provided with the two air-entrapping connecting through holes, the first air bottle air-entrapping connector and the second air bottle air-entrapping connector, the double-air-entrapping requirement is met, the air-entrapping efficiency is high, and the air-entrapping effect is good.

Description

Technical fields:

[0001] This utility model relates to the field of control valve equipment technology, and more specifically to a dual-port CNG gas integrated control valve. Background technology:

[0002] Existing CNG (compressed natural gas) gas control valves typically include a refueling port, a first connector for connecting to a gas cylinder, and a second connector for connecting to the engine. There is a refueling flow channel between the refueling port and the first connector, and a main gas flow channel between the first and second connectors. They also include a refueling valve for opening and closing the refueling flow channel, a main shut-off valve for opening and closing the main gas flow channel, a pressure gauge for detecting the pressure value within the main gas flow channel, and a pressure sensor for transmitting the pressure value to the instrument panel. The refueling port, first connector, second connector, refueling valve, main shut-off valve, pressure gauge, and pressure sensor are all integrated onto a single panel and connected via piping. Because the piping is exposed, there are many potential leak points, and engine movement easily generates vibrations, making piping leaks very likely.

[0003] Therefore, the CNG gas integrated control valve with Chinese patent application number 201310541095.3 integrates the various components of the CNG gas supply system into a rigid housing, effectively preventing gas leakage in the pipeline and greatly improving safety; the gas filling channel and the main gas flow channel are reasonably set and easy to process. However, it is a single gas filling port, which limits its gas filling efficiency and cannot meet the need for higher gas filling volume. Utility model content:

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a dual-filling-port CNG gas integrated control valve. It is equipped with two gas filling connection holes and a first gas cylinder filling connector and a second gas cylinder filling connector, which can meet the dual gas filling needs. Moreover, it has high gas filling efficiency and good effect.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] A dual-port CNG gas integrated control valve includes a main valve body. The upper middle part of the main valve body is formed with a first venting through hole that extends to the left and right ends of the main valve body. A first gas cylinder filling connector and a second gas cylinder filling connector are respectively screwed onto the internal threads formed at both ends of the first venting through hole.

[0007] The main valve body has through-holes for gas filling on both the left and right sides at the middle. Two gas filling valve seats are inserted into the corresponding through-holes for gas filling. The outer side of the through-hole has an outwardly extending through-hole at the middle. The outer through-hole has a vertically extending through-hole at the middle. The bottom of the vertical through-hole communicates with the corresponding outer through-hole. The upper front wall of the main valve body has shut-off valve mounting holes on both the left and right sides. The top of the vertical through-hole communicates with the corresponding shut-off valve mounting hole.

[0008] The rear end of the rear through hole formed in the middle of the rear end face of the shut-off valve mounting hole is connected to the first venting through hole.

[0009] A rearwardly extending gas supply shut-off valve hole is formed in the middle of the front wall surface of the main valve body between the two shut-off valve mounting holes. The rear end of the first rear through hole formed in the middle of the rear end surface of the gas supply shut-off valve hole communicates with the first venting through hole. A first vertical hole extending downward is formed in the bottom middle of the rear part of the gas supply shut-off valve hole. The bottom end of the first vertical hole communicates with the middle threaded hole formed in the bottom end surface of the main valve body. A middle compression plug is threaded into the middle threaded hole. An exhaust shut-off valve hole is formed in the middle of the front wall surface of the lower part of the main valve body. A second rear through hole formed in the middle of the rear end surface of the exhaust shut-off valve hole extends backward and communicates with the outside. The exhaust shut-off valve hole communicates with the first vertical hole.

[0010] A valve seat is fitted at the rear end of the shut-off valve mounting hole, the gas supply shut-off valve hole, and the exhaust shut-off valve hole. The rear end face of the valve seat presses against the rear end face of the shut-off valve mounting hole, the gas supply shut-off valve hole, or the exhaust shut-off valve hole. An upwardly extending protrusion is formed in the middle of the front wall of the valve seat. A vertical through hole is formed in the middle of the front end face of the protrusion, extending backward and protruding out of the rear end face of the valve seat. The rear end of the vertical through hole communicates with and is aligned with the corresponding rear through hole, the first rear through hole, or the second rear through hole.

[0011] The inner sidewalls of the rear of the shut-off valve mounting hole, the gas supply shut-off valve hole, and the exhaust shut-off valve hole are all formed with annular grooves. The top of the vertical hole extends out of the inner sidewall of the corresponding annular groove of the shut-off valve mounting hole and communicates with the annular groove. The top of the first vertical hole extends out of the bottom surface of the annular groove of the gas supply shut-off valve hole and communicates with the annular groove. The first vertical hole communicates with the annular groove of the exhaust shut-off valve hole.

[0012] The inner walls of the shut-off valve mounting hole, the gas supply shut-off valve hole, and the exhaust shut-off valve hole are all formed with internal threads. The valve stem seat is screwed onto the corresponding internal threads. A gasket is inserted into the protruding post of the valve port seat. The gasket is clamped between the front wall surface of the edge of the valve port seat and the bottom end face of the valve stem seat. Multiple air guide holes are formed on the side wall of the gasket. The air guide holes communicate with the corresponding annular grooves.

[0013] The valve stem seat has a stepped through hole formed in the middle, with the inner diameter of the front end section being smaller than that of the rear end section. The valve stem is inserted into the front end section of the stepped through hole, with its outer side wall close to or tightly against the inner side wall of the front end section. The rear end of the valve stem has a connecting part with an outer diameter larger than that of the valve stem. A valve core is installed at the rear of the connecting part. The valve core is screwed onto the internal thread formed on the inner side wall of the middle part of the rear end hole of the stepped through hole. The rear end of the valve core is an elastic sealing block, with the rear end face of the elastic sealing block facing the front end face of the corresponding protruding post and covering the front end of the corresponding vertical through hole.

[0014] The front end of the valve stem extends out of the valve stem seat and is fixed with a handwheel.

[0015] The front end of the inflation valve seat extends out of the front end of the corresponding gas connection through hole, and a radially extending edge is formed on its outer side wall. The rear end face of the radially extending edge presses against the front wall of the main valve body. The rear gasket is inserted into the rear end of the corresponding gas connection through hole. The outer side wall of the inflation valve seat is close to or tightly attached to the outer side wall of the corresponding gas connection through hole. The rearwardly extending sleeve portion formed in the middle of the rear wall of the inflation valve seat is inserted into the middle through hole of the rear gasket. The outer side wall of the sleeve portion is tightly attached to or close to the inner side wall of the middle through hole of the rear gasket. The outer side wall of the rear gasket is close to or tightly attached to the inner side wall of the corresponding gas connection through hole. The rear end of the rear gasket extends out of the rear end of the corresponding gas connection through hole, and a rear extension portion is formed on its outer side wall. The front wall face of the rear extension portion presses against the rear wall of the main valve body.

[0016] A radially extending limiting ring is formed on the inner sidewall of the rear part of the rear washer sleeve. The screw part of the tension bolt is inserted into the through hole in the middle of the limiting ring and screwed onto the internal thread formed on the inner sidewall of the rear end of the sleeve body. The rotating part of the tension bolt is inserted into the rear washer sleeve, and its front end face presses against the rear end face of the limiting ring.

[0017] The front end face of the central through hole of the sleeve extends out of the front end face of the air filling valve seat. An inner annular groove is formed on the inner side wall of the front end of the sleeve. Multiple side through holes are formed on the side wall of the inner annular groove. The side through holes are connected to the corresponding air filling connection through holes.

[0018] The rear part of the plug-type dustproof pin is inserted into the middle through hole of the inflation valve seat. The two sealing rings formed on its outer side wall each contain a first sealing ring. The outer side wall of the first sealing ring is pressed against the inner side wall of the middle through hole of the inflation valve seat, and the inner annular groove is located between the two first sealing rings.

[0019] The outstanding effect of this utility model is:

[0020] It is equipped with two gas filling connection holes and a first gas cylinder filling connector and a second gas cylinder filling connector, which can meet the dual gas filling needs, and its gas filling efficiency is high and the effect is good. Attached image description:

[0021] Figure 1 This is a partial structural schematic diagram of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0023] Figure 3 This is a partial side view of the present invention;

[0024] Figure 4 yes Figure 1 AA section view;

[0025] Figure 5 yes Figure 1 BB section view;

[0026] Figure 6 yes Figure 1 CC section view. Detailed implementation method:

[0027] For example, see below. Figures 1 to 6 As shown, a dual-port CNG gas integrated control valve includes a main valve body 10. The upper middle part of the main valve body 10 has a first venting through hole 11 that extends to the left and right ends of the main valve body 10. A first gas cylinder filling connector 1 and a second gas cylinder filling connector 2 are respectively screwed onto the internal threads formed at both ends of the first venting through hole 11. A sealing ring is clamped between the inner end of the first gas cylinder filling connector 1 and the second gas cylinder filling connector 2 and the inner sidewall at both ends of the first venting through hole 11.

[0028] The main valve body 10 has through-holes 12 formed on the left and right sides of its middle section. Two inflation valve seats 20 are inserted into the corresponding through-holes 12. An outwardly extending through-hole 13 is formed in the middle of the outer side of the through-hole 12. An internal thread is formed on the inner sidewall of the outer end of the through-hole 13. An outer plug is screwed onto the corresponding internal thread. A sealing ring is clamped between the outer sidewall of the outer plug and the inner sidewall of the outer end of the through-hole 13. A vertical hole 14 is formed in the middle of the through-hole 13. The bottom end of the vertical hole 14 communicates with the corresponding through-hole 13. The left and right sides of the upper front wall of the main valve body 10 have shut-off valve mounting holes 15. The top end of the vertical hole 14 communicates with the corresponding shut-off valve mounting hole 15.

[0029] The front end of the inflation valve seat 20 extends out of the front end of the corresponding gas filling connection through hole 12. A radially extending edge 21 is formed on its outer side wall. The rear end face of the radially extending edge 21 presses against the front wall of the main valve body 10. The rear gasket sleeve 22 is inserted into the rear end of the corresponding gas filling connection through hole 12. A sealing ring is nested in the annular groove formed on the front outer side wall of the rear gasket sleeve 22. The outer side wall of the sealing ring presses against the inner side wall of the corresponding gas filling connection through hole 12.

[0030] The outer side wall of the inflation valve seat 20 is close to or tightly abuts the outer side wall of the gas connection through hole 12, with a sealing ring sandwiched between them. The rearwardly extending sleeve portion 23 formed in the middle of the rear wall of the inflation valve seat 20 is inserted into the middle through hole of the rear washer sleeve 22. The outer side wall of the sleeve portion 23 is tightly abutting or close to the inner side wall of the middle through hole of the rear washer sleeve 22, with a sealing ring sandwiched between them. The outer side wall of the rear washer sleeve 22 is close to or tightly abuts the inner side wall of the corresponding gas connection through hole 12, with a sealing ring sandwiched between them. The rear end of the rear washer sleeve 22 extends out of the rear end of the corresponding gas connection through hole 12, and a rear extension portion 221 is formed on its outer side wall. The front wall surface of the rear extension portion 221 presses against the rear wall surface of the main valve body 10.

[0031] A radially extending limiting ring 222 is formed on the inner side wall of the rear part of the rear washer sleeve 22. The screw part of the tension bolt 24 is inserted into the middle through hole of the limiting ring 222 and screwed onto the internal thread formed on the inner side wall of the rear end of the sleeve part 23. The rotating part of the tension bolt 24 is inserted into the rear washer sleeve 22, and its front end face presses against the rear end face of the limiting ring 222.

[0032] Furthermore, the rear end of the rear through hole 151 formed in the middle of the rear end face of the shut-off valve mounting hole 15 is connected to the first venting through hole 11.

[0033] A rearwardly extending gas supply shut-off valve hole 16 is formed in the middle of the front wall surface of the main valve body 10 between the two shut-off valve mounting holes 15. The rear end of the first rear through hole 161 formed in the middle of the rear end surface of the gas supply shut-off valve hole 16 communicates with the first venting through hole 11. A first vertical hole 17 extending downward is formed in the bottom surface of the middle of the rear part of the gas supply shut-off valve hole 16. The bottom end of the first vertical hole 17 communicates with the middle threaded hole 18 formed in the bottom end surface of the main valve body 10. A middle compression plug 3 is threaded into the middle threaded hole 18. The outer wall of the middle compression plug 3 is connected to the... A sealing ring is held between the annular groove formed on the inner sidewall of the bottom end of the central threaded hole 18. An exhaust shut-off valve hole 19 is formed in the middle of the front wall of the lower part of the main valve body 10. A second rear through hole 191 formed in the middle of the rear end face of the exhaust shut-off valve hole 19 extends rearward and communicates with the threaded hole formed in the middle of the rear end face of the main valve body 10. A rear connector is threaded onto the threaded hole. The rear connector communicates with the outside. A sealing ring is held between the annular groove formed on the outer sidewall of the front part of the rear connector and the inner sidewall of the rear end of the threaded hole. The exhaust shut-off valve hole 19 communicates with the first vertical hole 17.

[0034] Furthermore, a valve seat 30 is fitted at the rear end of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16, and the exhaust shut-off valve hole 19. The rear end face of the valve seat 30 presses against the rear end face of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16, or the exhaust shut-off valve hole 19. A sealing groove is formed on the edge of the rear end face of the valve seat 30, and a sealing ring is nested in the sealing groove. Its rear end face presses against the rear end face of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16, or the exhaust shut-off valve hole 19. An upwardly extending protruding post 31 is formed in the middle of the front wall of the valve seat 30. A vertical through hole 32 is formed in the middle of the front end face of the protruding post 31, extending backward and protruding out of the rear end face of the valve seat 30. The rear end of the vertical through hole 32 communicates with and is aligned with the corresponding rear through hole 151, the first rear through hole 161, or the second rear through hole 191.

[0035] An annular groove is formed on the inner sidewall of the rear part of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16 and the exhaust shut-off valve hole 19. The top end of the vertical hole 14 extends out of the inner sidewall of the corresponding annular groove of the shut-off valve mounting hole 15 and communicates with the annular groove. The top end of the first vertical hole 17 extends out of the bottom surface of the annular groove of the gas supply shut-off valve hole 16 and communicates with the annular groove. The first vertical hole 17 communicates with the annular groove of the exhaust shut-off valve hole 19.

[0036] The top surface of the annular groove of the gas supply shut-off valve hole 16 is formed with an upwardly extending upper exhaust hole. The top end of the upper exhaust hole is connected to the engine charging connector 9 screwed to the middle of the top surface of the main valve body 10. A sealing ring is clamped between the lower outer wall of the engine charging connector 9 and the screw hole in the middle of the top surface of the main valve body 10.

[0037] The inner walls of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16, and the exhaust shut-off valve hole 19 are all formed with internal threads. The valve stem seat 37 is screwed onto the corresponding internal threads. A sealing ring is clamped between the valve stem seat 37 and the inner wall of the shut-off valve mounting hole 15, the gas supply shut-off valve hole 16, or the exhaust shut-off valve hole 19.

[0038] A pad 33 is inserted into the protruding post 31 of the valve seat 30. The pad 33 is clamped between the front wall surface of the side of the valve seat 30 and the bottom end face of the valve stem seat 37. Multiple air guide holes 331 are formed on the side wall of the pad 33, and the air guide holes 331 communicate with the corresponding annular groove.

[0039] The valve stem seat 37 has a stepped through hole formed in the middle, with the inner diameter of the front end section being smaller than that of the rear end section. The valve stem 34 is inserted into the front end section of the stepped through hole, with its outer side wall close to or tightly against the inner side wall of the front end section. The rear end of the valve stem 34 has a connecting part with an outer diameter larger than that of the valve stem 34. A sealing gasket is sandwiched between the front end face of the edge of the connecting part and the front end face of the rear end section. A sealing groove is formed on the outer side wall of the valve stem 34, and a sealing ring is nested in the sealing groove, with its outer side wall pressing against the inner side wall of the front end section of the stepped through hole.

[0040] The rear end face of the connector has an elongated insertion hole formed in the middle, and the front end face of the valve core 35 has an elongated protrusion formed in the middle. The protrusion is inserted into the corresponding elongated insertion hole. The two are matched. The valve core 35 is screwed onto the internal thread formed on the inner side wall of the rear end hole of the stepped through hole. The rear end of the valve core 35 is fixed with an elastic sealing block 36. The rear end face of the elastic sealing block 36 faces the front end face of the corresponding protruding post 31 and covers the front end of the corresponding vertical through hole 32.

[0041] The front end of the valve stem 34 extends out of the valve stem seat 37 and is fixed with a handwheel.

[0042] Furthermore, the front end face of the central through hole of the sleeve part 23 extends out of the front end face of the air filling valve seat 20, and an inner annular groove is formed on the inner side wall of the front end of the sleeve part 23. Multiple side through holes are formed on the side wall of the inner annular groove, and the side through holes communicate with the corresponding air filling connection through hole 12.

[0043] The rear of the plug-type dustproof pin 25 is inserted into the middle through hole of the inflation valve seat 20. The two sealing rings formed on its outer side wall each contain a first sealing ring 4. The outer side wall of the first sealing ring 4 presses against the inner side wall of the middle through hole of the inflation valve seat 20, and the inner annular groove is located between the two first sealing rings 4.

[0044] The front end of the pin-type dustproof pin 25 is formed with a head whose outer diameter is larger than that of the pin-type dustproof pin 25. The rear end face of the head presses against the front wall of the main valve body 10. A chain is fixed on the front end face of the head. The other end of the chain can be fixed to the bottom surface of the main valve body 10 or the connecting bolt fixed at the rear.

[0045] A pressure sensor 5 and a pressure gauge 6 are fixed on the top surface of the main valve body 10. The sensing ends of the pressure sensor 5 and the pressure gauge 6 are connected to the first ventilation through hole 11. The pressure sensor 5 and the pressure gauge 6 can detect the pressure of the gas being transported in the first ventilation through hole 11 at all times.

[0046] The gas at the external through-hole 13 is controlled by a one-way valve to allow the gas discharged from the vertical hole 14 to flow in one direction.

[0047] Furthermore, the structure of the one-way valve is as follows: a downwardly extending lower vertical through hole 131 is formed in the middle of the outer through hole 13; the top end of the lower vertical through hole 131 communicates with the bottom end of the corresponding upper vertical hole 14; the one-way valve push rod 40 is inserted into the lower vertical through hole 131; the outer side wall of the one-way valve push rod 40 is close to or near the inner side wall of the lower vertical through hole 131; the lower pressing plug 41 is screwed onto the internal thread formed on the inner side wall of the bottom end of the lower vertical through hole 131; a sealing ring is clamped between the outer side wall of the lower pressing plug 41 and the inner side wall of the bottom end of the lower vertical through hole 131.

[0048] The top surface of the lower pressure plug 41 presses against the bottom end surface of the one-way valve top rod 40. An annular slot 141 is formed on the lower inner side wall of the vertical hole 14. A valve core guide sleeve 142 and a transition sleeve 143 are inserted into the annular slot 141. The outer side walls of the valve core guide sleeve 142 and the transition sleeve 143 are in close contact with the inner side wall of the annular slot 141. A sealing ring is clamped between the outer side wall of the transition sleeve 143 and the inner side wall of the annular slot 141.

[0049] The bottom end face of the valve core guide sleeve 142 presses against the top end face of the transition sleeve 143, and the bottom end face of the transition sleeve 143 presses against the top end face of the one-way valve push rod 40. A concave hole is formed in the middle of the top surface of the one-way valve push rod 40, and multiple side through holes are formed on the inner wall of the concave hole. The side through holes communicate with the upper part of the lower vertical through hole 131, and the upper part of the lower vertical through hole 131 communicates with the corresponding outer through hole 13. A radial annular protrusion 144 is formed in the middle of the inner wall of the transition sleeve 143, and the upper inner wall of the radial annular protrusion 144 has a small bottom inner diameter. The valve core 50 is inserted into the transition sleeve 143 and the valve core guide sleeve 142 with a large inner diameter tapered wall at the top. The lower part of the valve core 50 is screwed with a bottom block 51. An annular sealing block 52 is sandwiched between the top edge of the bottom block 51 and the bottom of the valve core 50. The annular sealing block 52 and the bottom block 51 are inserted into the radial annular protrusion 144. The outer wall of the annular sealing block 52 is pressed against the upper inner wall of the radial annular protrusion 144. The lower outer wall of the bottom block 51 is a tapered wall that is close to the inner wall of the radial annular protrusion 144.

[0050] The valve core 50 has multiple oblique through holes 53 formed on the outer side wall of the middle part. The valve core 50 has an upper sleeve part 54 formed on the top. The top of the oblique through holes 53 extends out of the bottom surface of the upper sleeve part 54 and communicates with the middle through hole of the upper sleeve part 54. The middle through hole communicates with the vertical hole 14. The outer side wall of the upper sleeve part 54 is close to the inner side wall of the valve core guide sleeve 142. A spring 55 is inserted in the upper sleeve part 54. The top of the spring 55 presses against the top surface of the annular slot 141, and the bottom of the spring 55 presses against the bottom surface of the upper sleeve part 54.

[0051] In this embodiment, when inflation is required, the two pin-type dustproof pins 25 can be pulled out. Then, the inflation connector is inserted into the central through hole of the inflation valve seat 20. The end side wall of the inflation connector has an air outlet hole facing the inner annular groove, allowing compressed gas to enter the outer through hole 13 and then into the concave hole of the one-way valve rod 40. Then, the corresponding valve core 50 is pushed upward, compressing the spring 55, allowing air to enter the first venting through hole 11 through the vertical hole 14, and finally, the gas is inflated from the first gas cylinder. The compressed gas is discharged through connector 1 and the second gas cylinder filling connector 2. During this process, the rear end face of the elastic sealing block 36 of the valve stem 34 at the shut-off valve mounting hole 15 faces the front end face of the corresponding protruding column 31 and does not press against the front end of the corresponding vertical through hole 32, ensuring the normal flow of compressed gas. At this time, the rear end face of the elastic sealing block 36 at the gas supply shut-off valve hole 16 and the exhaust shut-off valve hole 19 presses against the front end face of the corresponding protruding column 31 and covers the front end of the corresponding vertical through hole 32, ensuring the normal flow of compressed gas for filling, and not for exhausting.

[0052] When air needs to be discharged from the engine charging connector 9, the handwheel at the valve stem 34 at the shut-off valve mounting hole 15 can be rotated, so that the rear end face of the corresponding elastic sealing block 36 presses against the front end of the corresponding vertical through hole 32 and covers the front end of the corresponding vertical through hole 32, while the rear end face of the elastic sealing block 36 at the air supply shut-off valve hole 16 does not press against the front end face of the corresponding protrusion 31, so that compressed gas can only be discharged from the engine charging connector 9.

[0053] When venting is required, except for the rear end face of the elastic sealing block 36 at the vent shut-off valve hole 19, which is not pressed against the front end of the corresponding vertical through hole 32, the rear end faces of the remaining elastic sealing blocks 36 are pressed against the front end of the corresponding vertical through hole 32 and covered, so that the gas is discharged directly from the rear connector.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dual fill port CNG gas integrated control valve comprising a main valve body (10) characterized in that: The upper middle part of the main valve body (10) is formed with a first ventilation through hole (11) extending to the left and right and extending to the left and right ends of the main valve body (10). The first gas cylinder filling connector (1) and the second gas cylinder filling connector (2) are respectively screwed onto the internal threads formed at both ends of the first ventilation through hole (11). The main valve body (10) has a through-hole (12) for gas filling at the left and right sides of the middle part. Two gas filling valve seats (20) are inserted into the corresponding gas filling through-hole (12). The outer side of the gas filling through-hole (12) has an outwardly extending through-hole (13) at the middle. The outer through-hole (13) has a vertical hole (14) extending vertically upward at the middle. The bottom end of the vertical hole (14) communicates with the corresponding outer through-hole (13). The upper front wall of the main valve body (10) has a shut-off valve mounting hole (15) at the left and right sides. The top end of the vertical hole (14) communicates with the corresponding shut-off valve mounting hole (15).

2. The dual-air-inlet CNG gas integrated control valve according to claim 1, characterized in that: The rear end of the rear through hole (151) formed in the middle of the rear end face of the shut-off valve mounting hole (15) is connected to the first venting through hole (11). A rearwardly extending gas supply shut-off valve hole (16) is formed in the middle of the front wall of the main valve body (10) between the two shut-off valve mounting holes (15). The rear end of the first rear through hole (161) formed in the middle of the rear end face of the gas supply shut-off valve hole (16) communicates with the first venting through hole (11). A first vertical hole (17) extending downward vertically is formed in the bottom surface of the middle of the rear part of the gas supply shut-off valve hole (16). The bottom end of the first vertical hole (17) The central threaded hole (18) formed on the bottom end face of the main valve body (10) is connected to the central threaded hole (18), and a central compression plug (3) is threaded into the central threaded hole (18). An exhaust shut-off valve hole (19) is formed in the middle of the front wall surface of the lower part of the main valve body (10). A second rear through hole (191) formed in the middle of the rear end face of the exhaust shut-off valve hole (19) extends rearward and communicates with the outside. The exhaust shut-off valve hole (19) is connected to the first vertical hole (17).

3. The dual air inlet CNG gas integrated control valve according to claim 2, characterized in that: A valve seat (30) is fitted at the rear end of each of the shut-off valve mounting hole (15), the gas supply shut-off valve hole (16), and the exhaust shut-off valve hole (19). The rear end face of the valve seat (30) presses against the rear end face of the shut-off valve mounting hole (15), the gas supply shut-off valve hole (16), or the exhaust shut-off valve hole (19). A protruding post (31) extending upward is formed in the middle of the front wall of the valve seat (30). A vertical through hole (32) extending backward and extending out of the rear end face of the valve seat (30) is formed in the middle of the front end face of the protruding post (31). The rear end of the vertical through hole (32) communicates with and is aligned with the corresponding rear through hole (151), the first rear through hole (161), or the second rear through hole (191).

4. The dual air inlet CNG gas integrated control valve according to claim 2, characterized in that: An annular groove is formed on the inner sidewall of the rear part of the shut-off valve mounting hole (15), the gas supply shut-off valve hole (16) and the exhaust shut-off valve hole (19). The top end of the vertical hole (14) extends out of the inner sidewall of the corresponding annular groove of the shut-off valve mounting hole (15) and communicates with the annular groove. The top end of the first vertical hole (17) extends out of the bottom surface of the annular groove of the gas supply shut-off valve hole (16) and communicates with the annular groove. The first vertical hole (17) communicates with the annular groove of the exhaust shut-off valve hole (19).

5. The dual air inlet CNG gas integrated control valve according to claim 3, characterized in that: The inner walls of the shut-off valve mounting hole (15), the gas supply shut-off valve hole (16), and the exhaust shut-off valve hole (19) are all formed with internal threads. The valve stem seat (37) is screwed onto the corresponding internal threads. A gasket (33) is inserted into the protruding post (31) of the valve seat (30). The gasket (33) is clamped between the front wall surface of the valve seat (30) and the bottom end surface of the valve stem seat (37). Multiple air guide holes (331) are formed on the side wall of the gasket (33). The air guide holes (331) are connected to the corresponding annular grooves. The valve stem seat (37) has a stepped through hole formed in the middle. The inner diameter of the front end hole is smaller than that of the rear end hole. The valve stem (34) is inserted into the front end hole of the stepped through hole. Its outer side wall is close to or tightly attached to the inner side wall of the front end hole. The rear end of the valve stem (34) has a connecting part with an outer diameter larger than that of the valve stem (34). A valve core (35) is installed at the rear of the connecting part. The valve core (35) is screwed onto the internal thread formed on the inner side wall of the middle part of the rear end hole of the stepped through hole. The rear end of the valve core (35) has an elastic sealing block (36). The rear end face of the elastic sealing block (36) faces the front end face of the corresponding protruding column (31) and covers the front end of the corresponding vertical through hole (32).

6. The dual air inlet CNG gas integrated control valve according to claim 5, characterized in that: The front end of the valve stem (34) extends out of the valve stem seat (37) and is fixed with a handwheel.

7. The dual air inlet CNG gas integrated control valve according to claim 1, characterized in that: The front end of the inflation valve seat (20) extends out of the front end of the corresponding gas filling connection through hole (12), and a radially extending edge (21) is formed on its outer side wall. The rear end face of the radially extending edge (21) presses against the front wall of the main valve body (10). The rear washer sleeve (22) is inserted into the rear end of the corresponding gas filling connection through hole (12). The outer side wall of the inflation valve seat (20) is close to the outer side wall of the gas filling connection through hole (12) or tightly abuts against the inner side wall of the corresponding gas filling connection through hole (12). The middle part of the rear wall of the inflation valve seat (20) is formed with a radially extending edge (21). The rearward extending sleeve part (23) is inserted into the middle through hole of the rear gasket sleeve (22). The outer side wall of the sleeve part (23) is close to or near the inner side wall of the middle through hole of the rear gasket sleeve (22). The outer side wall of the rear gasket sleeve (22) is close to or close to the inner side wall of the corresponding gas filling connection through hole (12). The rear end of the rear gasket sleeve (22) extends out of the rear end of the corresponding gas filling connection through hole (12). A rear extension part (221) is formed on its outer side wall. The front wall surface of the rear extension part (221) presses against the rear wall surface of the main valve body (10). A radially extending limiting ring (222) is formed on the inner sidewall of the rear part of the rear washer sleeve (22). The screw part of the tension bolt (24) is inserted into the middle through hole of the limiting ring (222) and screwed onto the internal thread formed on the inner sidewall of the rear end of the sleeve part (23). The rotating part of the tension bolt (24) is inserted into the rear washer sleeve (22), and its front end face presses against the rear end face of the limiting ring (222).

8. The dual air inlet CNG gas integrated control valve according to claim 7, characterized in that: The front end face of the central through hole of the sleeve part (23) extends out of the front end face of the air filling valve seat (20). An inner annular groove is formed on the inner side wall of the front end of the sleeve part (23). Multiple side through holes are formed on the side wall of the inner annular groove. The side through holes are connected to the corresponding air filling connection through hole (12). The rear part of the plug-type dustproof pin (25) is inserted into the middle through hole of the inflation valve seat (20). The two sealing rings formed on its outer side wall each contain a first sealing ring (4). The outer side wall of the first sealing ring (4) is pressed against the inner side wall of the middle through hole of the inflation valve seat (20). The inner annular groove is located between the two first sealing rings (4).

9. The dual air inlet CNG gas integrated control valve according to claim 8, characterized in that: The front end of the pin-type dustproof pin (25) is formed with a head whose outer diameter is larger than that of the pin-type dustproof pin (25). The rear end face of the head presses against the front wall of the main valve body (10), and a chain is fixed on the front end face of the head.

10. The dual air inlet CNG gas integrated control valve according to claim 1, characterized in that: A pressure sensor (5) and a pressure gauge (6) are fixed on the top surface of the main valve body (10), and the sensing ends of the pressure sensor (5) and the pressure gauge (6) are connected to the first ventilation through hole (11). The gas at the external through hole (13) is controlled by a one-way valve to allow the gas discharged from the vertical hole (14) to flow in one direction.

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