NGV2 gas filling gun head

Abstract

The invention discloses an NGV2 gas filling gun head which comprises a sleeve, a gun body capable of moving relative to the sleeve is arranged in the sleeve, the rear end of the gun body is connected with a gas inlet connector in a sealed mode, and a locking mechanism capable of locking a CNG supplementing connector in the gun body is arranged between the outer wall of the front end of the gun body and the sleeve. A valve element capable of being driven to be opened by the CNG supplementing connector is movably arranged in the gun body, and a first jacking spring capable of driving the valve element to be closed is arranged in the position, between the gas inlet connector and the valve element, of the gun body. The CNG supplement connector is simple in structure, the CNG supplement connector is conveniently connected with the gun body, and the CNG supplement connector and the gun body can be effectively locked after being connected, so that the CNG supplement connector and the gun body are prevented from loosening.

Description

Technical Field

[0001] This invention relates to the field of CNG technology, and specifically to an NGV2 refueling nozzle. Background Technology

[0002] CNG stands for Compressed Natural Gas for Automobiles, and it is typically available in two pressure levels: 20 MPa and 25 MPa. CNG is a high-pressure, flammable, and explosive gas, and it is prone to leakage during transportation and storage. If leaked, it can easily ignite and explode upon contact with a spark.

[0003] CNG supplementary connectors come in two types: one conforms to the ISO 14469-1 standard and has a diameter of approximately 8mm, used with NGV1 nozzles; the other conforms to the ISO 14469-2 standard and has a diameter of approximately 12mm, used with NGV2 nozzles. The NGV2 nozzle has a charging speed twice that of the NGV1 nozzle.

[0004] Currently, the NGV nozzles commonly used in China are Type 1 nozzles, with an inner diameter of 8mm. Many large vehicles on the market have very large onboard CNG storage cylinders, making the filling speed too slow when using traditional NGV1 nozzles.

[0005] Because the flow area of ​​a pipe with a diameter of 8mm is 200mm². 2 A pipe with a diameter of 12mm has a flow area of ​​452mm². 2 Therefore, the 12mm diameter NGV2 nozzle can be filled twice as fast as the NGV1 nozzle.

[0006] Due to a design flaw, the CNG refill connector currently in use on the NGV2 gun head generally requires unlocking the locking mechanism before insertion, making the process relatively complicated. Furthermore, the CNG refill connector cannot be effectively locked after connection to the gun body, making it prone to detachment due to impacts during use. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an NGV2 gas nozzle with a simple structure and convenient connection between the CNG supplement connector and the nozzle body.

[0008] Another objective of this invention is to provide an NGV2 refueling nozzle that can effectively lock the CNG supplement connector after it is connected to the nozzle body, thereby preventing it from becoming loose.

[0009] To achieve the first objective, the present invention adopts the following solution: an NGV2 refueling nozzle, characterized in that: it includes a sleeve, a nozzle body that can move relative to the sleeve is provided inside the sleeve, an air inlet connector is sealed and connected to the rear end of the nozzle body, a locking mechanism that can lock the CNG refueling connector in the nozzle body is provided between the outer wall of the front end of the nozzle body and the sleeve, a valve core that can be driven to open by the CNG refueling connector is movably provided in the nozzle body, and a first pressure spring that can drive the valve core to close is provided in the nozzle body between the air inlet connector and the valve core.

[0010] As another improvement to the NGV2 gas nozzle of the present invention, the locking mechanism includes a hinge seat disposed on the outer wall of the front end of the nozzle body, a plurality of receiving slots are provided at intervals on the hinge seat, a pawl is disposed in the receiving slot through a hinge shaft, a second top pressure spring is disposed between the front part of the receiving slot and the pawl, a locking part is disposed at the lower front end of the pawl, an annular positioning groove is disposed on the outer wall of the CNG supplement connector at a position corresponding to the locking part, a positioning protrusion is disposed at the upper front end of the pawl, a positioning annular groove is disposed at the front end of the sleeve, a clearance slope is disposed on the rear end face of the positioning protrusion, and a squeezing part is disposed at the rear end of the positioning annular groove, which can drive the locking part to engage in the annular positioning groove when the nozzle body moves backward.

[0011] As another improvement to the NGV2 refueling nozzle of the present invention, the valve core includes a valve core rod, an air outlet channel is provided in the valve core rod, an end cap that can close the air outlet channel is provided at the rear end of the valve core rod, a plurality of air inlet holes are provided at intervals on the outer wall of the valve core rod near the end cap, one end of the first pressure spring presses against the end cap, a first sealing mechanism that can seal with the end cap is provided in the nozzle body, a tapered connecting part is provided at the front end of the valve core rod, a first limiting ring groove is provided in the CNG supplement connector, a first sealing ring that can form a seal with the tapered connecting part is provided in the first limiting ring groove, and a second sealing mechanism that can form a seal with the CNG supplement connector is provided at the front end of the air outlet channel.

[0012] As another improvement to the NGV2 gas nozzle of the present invention, the first sealing mechanism includes a rear protruding ring disposed in the nozzle body at the rear end of the gas outlet channel. The rear protruding ring and the inner wall of the nozzle body form a first receiving ring groove. A main sealing ring is disposed in the first receiving ring groove. A first O-ring is disposed outside the main sealing ring. A pressure sleeve is disposed in the rear end of the nozzle body. The front end of the pressure sleeve presses against the rear end of the main sealing ring, and the rear end of the pressure sleeve presses against the gas inlet connector.

[0013] As another improvement to the NGV2 refueling nozzle of the present invention, the second sealing mechanism includes a second receiving ring groove disposed in the front end of the nozzle body, a sealing ring body movably disposed in the second receiving ring groove, a conical sealing part disposed at the front end of the sealing ring body, a compression protrusion ring disposed at the front end of the CNG supplement connector that can seal with the conical sealing part, and a third top pressure spring sleeved on the outer wall of the valve core between the sealing ring body and the second receiving ring groove.

[0014] To achieve the second objective, the present invention adopts the following solution: an NGV2 gas nozzle, characterized in that: an anti-disengagement mechanism is provided between the hinge seat and the sleeve to prevent the locking mechanism from unlocking.

[0015] As another improvement to the NGV2 gas nozzle of the present invention, the anti-detachment mechanism includes a threaded groove provided in the rear end of the hinge seat, and a threaded post provided in the sleeve, the threaded post being screwed into the threaded groove.

[0016] As another improvement to the NGV2 gas nozzle of the present invention, the anti-detachment mechanism includes an inner groove provided in the rear end of the hinge seat, a second limiting ring groove provided in the inner wall of the inner groove, a connecting seat movably provided on the outer wall of the nozzle body at the rear end of the hinge seat, an installation slot provided in the connecting seat, a snap-fit ​​seat movably provided in the installation slot, a snap-fit ​​protrusion provided at the corresponding position of the snap-fit ​​seat and the second limiting ring groove, and a fourth top-pressure spring provided between the installation slot and the snap-fit ​​seat.

[0017] As another improvement to the NGV2 gas nozzle of the present invention, the anti-detachment mechanism includes a limiting ring seat disposed on the rear side of the hinge seat, an arc-shaped surface disposed at the rear end of the limiting ring seat, a clearance ring groove disposed at the front end of the limiting ring seat, a limiting external protrusion ring disposed on the outer wall of the gun body between the limiting ring seat and the hinge seat, a guide protrusion ring with an isosceles triangle cross section movably disposed on the gun body between the limiting external protrusion ring and the limiting ring seat, a receiving groove disposed on the sleeve, a latch movably disposed in the receiving groove, an arc-shaped guide surface disposed on the front end face of the latch, and a fifth top pressure spring disposed between the latch and the receiving groove.

[0018] As another improvement to the NGV2 gas nozzle of the present invention, a sealing ring groove is provided on the inner wall of the nozzle body, and a sealing gasket and a second O-ring are respectively provided in the sealing ring groove.

[0019] In summary, the advantages of this invention over the prior art are: the invention has a simple structure, the CNG replenishment connector is easy to connect to the gun body, and it can effectively lock the CNG replenishment connector after it is connected to the gun body, thereby preventing it from loosening. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0021] Figure 2 This is a three-dimensional schematic diagram of the gun body and CNG supplement connector of the present invention when separated.

[0022] Figure 3 For the present invention Figure 1 A cross-sectional schematic diagram.

[0023] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0024] Figure 5 This is a schematic diagram of the locking mechanism of the present invention.

[0025] Figure 6 This is a cross-sectional schematic diagram of the gun body of the present invention connected to the CNG supplementary connector.

[0026] Figure 7 for Figure 6 Enlarged diagram of point B in the middle.

[0027] Figure 8 This is a schematic diagram of the second sealing mechanism of the present invention.

[0028] Figure 9 for Figure 8 Enlarged diagram of point C in the middle.

[0029] Figure 10 This is a schematic diagram of the first embodiment of the anti-hair loss mechanism of the present invention.

[0030] Figure 11 for Figure 10 Enlarged diagram of point D in the middle.

[0031] Figure 12 This is a schematic diagram of a second embodiment of the anti-hair loss mechanism of the present invention.

[0032] Figure 13 for Figure 12 Enlarged diagram of point E in the middle.

[0033] Figure 14 This is a schematic diagram of a third embodiment of the anti-hair loss mechanism of the present invention.

[0034] Figure 15 for Figure 14 Enlarged schematic diagram at point F in the middle.

[0035] Figure 16-18 This is a schematic diagram of the unlocking process for the third implementation of the anti-detachment mechanism. Detailed Implementation

[0036] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0037] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0039] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] See Figure 1-9 An NGV2 refueling nozzle includes a sleeve 1, a nozzle body 2 that can move relative to the sleeve 1 is disposed inside the sleeve 1, an air inlet connector 3 is sealed to the rear end of the nozzle body 2, a locking mechanism 5 that can lock a CNG supplement connector 4 inside the nozzle body 2 is disposed between the outer wall of the front end of the nozzle body 2 and the sleeve 1, a valve core 6 that can be driven to open by the CNG supplement connector 4 is movably disposed inside the nozzle body 2, and a first pressure spring 7 that can drive the valve core 6 to close is disposed inside the nozzle body 2 between the air inlet connector 3 and the valve core 6.

[0041] This invention achieves the normally closed function of the refueling nozzle by setting a valve core 6 actuated by a first top-pressure spring 7. In the absence of connection or in the event of accidental disconnection of the connector, the valve core can automatically and quickly close the gas path under the action of the spring force, effectively preventing CNG leakage and thus significantly improving the safety performance of the NGV2 refueling nozzle.

[0042] The valve core of this invention does not require external power to open; instead, it is directly mechanically driven by the inserted CNG supplemental connector. This effectively eliminates the need for complex electronic or pneumatic control systems, simplifies operation, saves energy, and also improves system reliability and reduces the failure rate.

[0043] In this invention, a sheath 8 is threadedly connected to the rear end of the sleeve 1, and a limiting spring 9 is provided inside the rear end of the sheath 8. In this invention, the user can hold the NGV2 gas nozzle through the sheath 8. The limiting spring 9 effectively limits the forward movement of the sheath 8 and the sleeve 1.

[0044] See Figure 2 and 5 -6. The locking mechanism 5 of the present invention includes a hinge seat 51 disposed on the outer wall of the front end of the gun body 2. A plurality of receiving grooves 52 are disposed at intervals on the hinge seat 51. A pawl 54 is disposed in the receiving groove 52 through a hinge shaft 53. A second top pressure spring 50 is disposed between the front part of the receiving groove 52 and the pawl 54. A locking part 55 is disposed at the lower front end of the pawl 54. An annular positioning groove 56 is disposed on the outer wall of the CNG supplement connector 4 at a position corresponding to the locking part 55. A positioning protrusion 57 is disposed at the upper front end of the pawl 54. A positioning annular groove 58 is disposed at the front end of the sleeve 1. A clearance slope 59 is disposed on the rear end face of the positioning protrusion 57. A squeezing part 510 is disposed at the rear end of the positioning annular groove 58, which can drive the locking part 55 to engage in the annular positioning groove 56 when the gun body 2 moves backward.

[0045] The hinge seat 51 described in this invention is a flat cylindrical hinge seat. Four receiving grooves 52 are evenly distributed along the circumferential direction on the hinge seat 51. The receiving grooves 52 penetrate the upper outer wall and the front outer wall of the hinge seat 51.

[0046] In this invention, a first spring groove 511 is provided at the front end of the receiving groove 52, and a second spring groove 512 is provided at the corresponding position of the claw 54 and the spring groove 511. The second pressing spring 50 is provided in the first spring groove 511 and the second spring groove 512, so that when the claw 54 opens or closes, it can stably press the claw 54.

[0047] See Figure 3-4 The valve core 6 of the present invention includes a valve core rod 61, an air outlet channel 62 is provided in the valve core rod 61, an end 63 capable of sealing the air outlet channel 62 is provided at the rear end of the valve core rod 61, a plurality of air inlet holes 64 are provided at intervals on the outer wall of the valve core rod 61 near the end 63, one end of the first pressure spring 7 presses against the end 63, a first sealing mechanism 65 capable of sealing with the end 63 is provided in the gun body 2, a tapered connecting part 66 is provided at the front end of the valve core rod 61, a first limiting ring groove 67 is provided in the CNG supplement connector 4, a first sealing ring 68 capable of forming a seal with the tapered connecting part 66 is provided in the first limiting ring groove 67, and a second sealing mechanism 69 capable of forming a seal with the CNG supplement connector 4 is provided at the front end of the air outlet channel 62.

[0048] The end 63 described in this invention is a conical end. When NGV gas enters from the inlet connector, it is dispersed to the outer periphery of the end 63 by the conical end, thereby facilitating its entry into the outlet channel 62 from the inlet port 64.

[0049] See Figure 4 and 6 -7. The first sealing mechanism 65 of the present invention includes a rear protruding ring 651 disposed in the gun body 2 at the rear end of the air outlet channel 62. The rear protruding ring 651 and the inner wall of the gun body 2 form a first receiving ring groove 652. A main sealing ring 653 is disposed in the first receiving ring groove 652. A first O-ring sealing ring 654 is disposed on the outer sleeve of the main sealing ring 653. A pressure sleeve 655 is disposed in the rear end of the gun body 2. The front end of the pressure sleeve 655 presses against the rear end of the main sealing ring 653, and the rear end of the pressure sleeve 655 presses against the air inlet connector 3.

[0050] In this invention, when the air inlet connector 3 is screwed onto the rear end of the gun body 2, the rear end of the pressure sleeve 655 is pressed by the front end of the air connector 3, thereby pressing the main sealing ring 653 and the first O-ring 654 together, thus ensuring the sealing performance between them and the end 63.

[0051] See Figure 8-9 The second sealing mechanism 69 of the present invention includes a second receiving annular groove 691 disposed in the front end of the gun body 2, a sealing ring body 692 movably disposed in the second receiving annular groove 691, a conical sealing part 693 disposed at the front end of the sealing ring body 692, a compression protrusion ring 694 disposed at the front end of the CNG supplement connector 4 that can seal with the conical sealing part 693, and a third top pressure spring 695 sleeved on the outer wall of the valve core 6 between the sealing ring body 692 and the second receiving annular groove 691.

[0052] The third top pressure spring 695 in this invention applies a forward pressure to the sealing ring 692, driving the conical sealing part 693 to insert into the inner wall of the opening of the extrusion ring 694, thereby effectively sealing.

[0053] The present invention provides an anti-disengagement mechanism 10 between the hinge seat 51 and the sleeve 1 to prevent the locking mechanism 5 from unlocking.

[0054] See Figure 10-11 In a first embodiment of the anti-detachment mechanism 10 of the present invention, the anti-detachment mechanism 10 includes a threaded groove 101 disposed in the rear end of the hinge seat 51, and a threaded post 102 disposed in the sleeve 1, the threaded post 102 being screwed into the threaded groove 101.

[0055] The threaded post 102 of the present invention includes a C-shaped seat 100 movably sleeved on the outer wall of the gun body 2 at the rear end of the hinge seat 51, a C-shaped post 103 is provided at the front end of the C-shaped seat 100, and an external thread 104 is provided on the outer wall of the C-shaped post 103. The C-shaped seat 100 is fixed on the sleeve 1 by screws.

[0056] In this embodiment, after the CNG supplement connector 4 is inserted, the gun body 2 moves backward relative to the sleeve 1. At this time, the positioning protrusion 57 disengages from the positioning ring groove 58, and the snap-fit ​​part 55 is fixed in the annular positioning groove 56. The C-shaped post 103 is inserted into the threaded slot 101. By rotating the sleeve 1, the sleeve 1 can be effectively locked to the gun body 2, thereby effectively preventing the locking mechanism 5 from separating and causing the CNG supplement connector 4 to loosen, greatly improving the safety of gas refueling.

[0057] See Figure 12-13 In a second embodiment of the anti-detachment mechanism 10 of the present invention, the anti-detachment mechanism 10 includes an inner groove 105 disposed in the rear end of the hinge seat 51, a second limiting ring groove 106 disposed on the inner wall of the inner groove 105, a connecting seat 107 movably disposed on the outer wall of the gun body 2 at the rear end of the hinge seat 51, an installation slot 108 disposed in the connecting seat 107, a snap-fit ​​seat 109 movably disposed in the installation slot 108, a snap-fit ​​protrusion 1010 disposed at a position corresponding to the second limiting ring groove 106 on the snap-fit ​​seat 109, and a fourth top pressure spring 1011 disposed between the installation slot 108 and the snap-fit ​​seat 109.

[0058] The upper end of the snap-fit ​​base 109 of the present invention is connected to a button movably disposed on the sleeve 1 by a screw. By pressing the button, the snap-fit ​​protrusion 1010 can be disengaged from the second limiting ring groove 106, thereby separating the gun body 2 from the sleeve 1.

[0059] See Figure 14-18 In a third embodiment of the anti-detachment mechanism 10 of the present invention, the anti-detachment mechanism 10 includes a limiting ring seat 1012 disposed on the rear side of the hinge seat 51, an arc-shaped surface 1013 disposed at the rear end of the limiting ring seat 1012, a clearance ring groove 1014 disposed at the front end of the limiting ring seat 1012, a limiting external protrusion ring 1015 disposed on the outer wall of the gun body 2 between the limiting ring seat 1012 and the hinge seat 51, a guide protrusion ring 1016 with an isosceles triangle cross section movably disposed on the gun body 2 between the limiting external protrusion ring 1015 and the limiting ring seat 1012, a receiving groove 1017 disposed on the sleeve 1, a latch 1018 movably disposed in the receiving groove 1017, an arc-shaped guide surface 1019 disposed on the front end face of the latch 1018, and a fifth top pressure spring 1020 disposed between the latch 1018 and the receiving groove 1017.

[0060] In this embodiment, when the positioning protrusion 57 is located within the positioning ring groove 58, the latch 1018 is located behind the limiting ring seat 1012. When the CNG supplement connector 4 is inserted, the gun body 2 moves rearward relative to the sleeve 1. Under the action of the arc-shaped guide surface 1019 and the arc-shaped surface 1013, the latch 1018 is pushed up and then moves to the front end of the limiting ring seat 1012. Under the action of the fifth pressing spring 1020, the latch 1018 is pressed downward. At this time, the sleeve 1 cannot move rearward relative to the gun body 2, and the locking mechanism 5 is locked. When unlocking is required, first push the sleeve 1 forward, causing the latch 1018 to move forward past the guide ring 1016. Then, push the sleeve 1 backward, causing the latch 1018 to move the guide ring 1016 backward and fall into the relief ring groove 1014. At this time, the latch 1018 can use the inclined surface on the front side of the guide ring 1016 to move backward past the limit ring seat 1012, thereby unlocking the locking mechanism 5.

[0061] The present invention provides a sealing ring groove 11 on the inner wall of the gun body 2, and a sealing gasket 12 and a second O-ring 13 are respectively provided in the sealing ring groove 11.

[0062] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An NGV2 gas nozzle, characterized in that: The device includes a sleeve (1), a gun body (2) that can move relative to the sleeve (1) is provided inside the sleeve (1), an air inlet connector (3) is sealed and connected to the rear end of the gun body (2), a locking mechanism (5) that can lock the CNG supplement connector (4) inside the gun body (2) is provided between the outer wall of the front end of the gun body (2) and the sleeve (1), a valve core (6) that can be driven to open by the CNG supplement connector (4) is provided inside the gun body (2), and a first pressure spring (7) that can drive the valve core (6) to close is provided inside the gun body (2) between the air inlet connector (3) and the valve core (6).

2. The NGV2 gas nozzle according to claim 1, characterized in that: The locking mechanism (5) includes a hinge seat (51) disposed on the outer wall of the front end of the gun body (2). Multiple receiving slots (52) are spaced apart on the hinge seat (51). A pawl (54) is disposed within each receiving slot (52) via a hinge shaft (53). A second pressure spring (50) is disposed between the front of the receiving slot (52) and the pawl (54). A locking part (55) is disposed at the lower front end of the pawl (54). The CNG supplementary connection... The outer wall of the device (4) is provided with an annular positioning groove (56) at the corresponding position of the snap-fit ​​part (55). A positioning protrusion (57) is provided at the upper front end of the snap-fit ​​claw (54). A positioning ring groove (58) is provided at the front end of the sleeve (1). A clearance slope (59) is provided at the rear end face of the positioning protrusion (57). A squeezing part (510) is provided at the rear end of the positioning ring groove (58) so that the snap-fit ​​part (55) can be driven into the annular positioning groove (56) when the gun body (2) moves backward.

3. The NGV2 gas nozzle according to claim 1, characterized in that: The valve core (6) includes a valve core rod (61), an air outlet channel (62) is provided in the valve core rod (61), an end (63) that can close the air outlet channel (62) is provided at the rear end of the valve core rod (61), a plurality of air inlets (64) are provided at intervals on the outer wall of the valve core rod (61) near the end (63), one end of the first pressure spring (7) presses against the end (63), a first sealing mechanism (65) that can seal with the end (63) is provided in the gun body (2), a tapered connecting part (66) is provided at the front end of the valve core rod (61), a first limiting ring groove (67) is provided in the CNG supplement connector (4), a first sealing ring (68) that can form a seal with the tapered connecting part (66) is provided in the first limiting ring groove (67), and a second sealing mechanism (69) that can form a seal with the CNG supplement connector (4) is provided at the front end of the air outlet channel (62).

4. The NGV2 gas nozzle according to claim 3, characterized in that: The first sealing mechanism (65) includes a rear protruding ring (651) disposed in the gun body (2) at the rear end of the air outlet channel (62). The rear protruding ring (651) and the inner wall of the gun body (2) form a first receiving ring groove (652). A main sealing ring (653) is disposed in the first receiving ring groove (652). A first O-ring sealing ring (654) is disposed on the outer sleeve of the main sealing ring (653). A pressure sleeve (655) is disposed in the rear end of the gun body (2). The front end of the pressure sleeve (655) presses against the rear end of the main sealing ring (653), and the rear end of the pressure sleeve (655) presses against the air inlet connector (3).

5. An NGV2 gas nozzle according to claim 3 or 4, characterized in that: The second sealing mechanism (69) includes a second receiving ring groove (691) disposed in the front end of the gun body (2), a sealing ring body (692) is movably disposed in the second receiving ring groove (691), a conical sealing part (693) is disposed at the front end of the sealing ring body (692), a compression protrusion ring (694) that can seal with the conical sealing part (693) is disposed at the front end of the CNG supplement connector (4), and a third top pressure spring (695) is sleeved on the outer wall of the valve core (6) between the sealing ring body (692) and the second receiving ring groove (691).

6. The NGV2 gas nozzle according to claim 2, characterized in that: An anti-disengagement mechanism (10) is provided between the hinge seat (51) and the sleeve (1) to prevent the locking mechanism (5) from unlocking.

7. An NGV2 gas nozzle according to claim 6, characterized in that: The anti-detachment mechanism (10) includes a threaded groove (101) disposed in the rear end of the hinge seat (51), and a threaded post (102) disposed in the sleeve (1), the threaded post (102) being screwed into the threaded groove (101).

8. An NGV2 gas nozzle according to claim 6, characterized in that: The anti-detachment mechanism (10) includes an inner groove (105) provided in the rear end of the hinge seat (51), a second limiting ring groove (106) provided in the inner wall of the inner groove (105), a connecting seat (107) movably provided on the outer wall of the gun body (2) at the rear end of the hinge seat (51), an installation slot (108) provided in the connecting seat (107), a snap-fit ​​seat (109) movably provided in the installation slot (108), a snap-fit ​​protrusion (1010) provided at the corresponding position of the snap-fit ​​seat (109) and the second limiting ring groove (106), and a fourth top pressure spring (1011) provided between the installation slot (108) and the snap-fit ​​seat (109).

9. An NGV2 gas nozzle according to claim 6, characterized in that: The anti-detachment mechanism (10) includes a limiting ring seat (1012) disposed on the rear side of the hinge seat (51), an arc-shaped surface (1013) disposed at the rear end of the limiting ring seat (1012), a clearance ring groove (1014) disposed at the front end of the limiting ring seat (1012), a limiting external protrusion ring (1015) disposed on the outer wall of the gun body (2) between the limiting ring seat (1012) and the hinge seat (51), and a limiting external protrusion ring (1015) disposed on the outer wall of the gun body (2) between the limiting ring seat (1012) and the limiting ring (51). A guide ring (1016) with an isosceles triangular cross section is movably disposed on the gun body (2) between the ring seat (1012). A receiving groove (1017) is provided on the sleeve (1). A latch (1018) is movably disposed in the receiving groove (1017). An arc-shaped guide surface (1019) is provided on the front end face of the latch (1018). A fifth top pressure spring (1020) is provided between the latch (1018) and the receiving groove (1017).

10. An NGV2 gas nozzle according to claim 1, characterized in that: A sealing ring groove (11) is provided on the inner wall of the gun body (2), and a sealing gasket (12) and a second O-ring (13) are respectively provided in the sealing ring groove (11).

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