Efficient LNG filling equipment

Abstract

The present application relates to LNG filling equipment technical field, especially provide a kind of efficient LNG filling equipment, including gun body and injection control mechanism, injection control mechanism includes the guide base fixed on gun body and the self-made valve assembly being arranged in guide base, self-made valve assembly includes the valve seat sliding in guide base and the gas pipe being connected in the rear end of valve seat, rear end of gas pipe is connected in the driving handle of filling equipment, the front end of spout is connected to gun body in gun head of filling equipment alignment, valve seat is equipped with stage type elastic valve combination, locking handle action is when gun body is clamped on the gas inlet of external equipment, simultaneously push gas pipe action, it will be automatically closed, neither need person filling personnel to release a hand to operate other spray gas branch such as spray pot, also need filling personnel to operate filling gun to aim at the gas inlet of external equipment and inflate docking, compared with prior art, improve work efficiency, save labor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LNG filling equipment, in particular to a high-efficiency LNG filling equipment. BACKGROUND

[0002] LNG filling equipment refers to a special equipment system for safely and efficiently conveying liquefied natural gas (LNG) to LNG fuel vehicles, ships or storage tanks, and is the core terminal operating equipment of the LNG fuel supply chain. It stably conveys LNG liquid or gaseous fuel at a super-low temperature of -162℃, accurately measures the filling amount, and automatically shuts off through a flow meter and a control system. In addition to the filling machine, the common filling equipment also has a filling gun connected to the filling machine. The filling column gun is composed of a gun head, a feeding pipe system, a pressure adjusting part, a locking mechanism and the like. When in use, the head part of the filling gun is docked with the filling port, and the gun head is inserted into the filling port and locked by pulling the handle of the locking mechanism.

[0003] After the existing LNG filling gun is used for a long time, ice crystals and impurities are easily accumulated in the gun head, which causes sealing failure or reduces the filling efficiency. Before the foreign equipment is inserted into the steam filling port, cleaning is required to prevent impurities from entering the steam filling port. The conventional cleaning method needs to use a watering can or manual wiping, which is complicated to operate and affects the filling efficiency. SUMMARY

[0004] In order to solve the above problems, the present application provides the following technical solutions:

[0005] A high-efficiency LNG filling equipment, comprising a gun body and a jet control mechanism, the jet control mechanism comprising a guide seat fixed on the gun body and a self-made valve assembly arranged in the guide seat, the self-made valve assembly comprising a valve seat sliding in the guide seat and a gas pipe connected to the rear end of the valve seat, the rear end of the gas pipe being connected to a driving handle of the filling equipment, the front end of the guide seat being provided with a jet pipe, the front end of the jet pipe being connected into the gun body and being aligned with a gun head of the filling equipment, the rear end of the jet pipe entering the guide seat and being correspondingly arranged in the movement direction of the valve seat, a stage type elastic valve combination being arranged in the valve seat, the stage type elastic valve combination being triggered to automatically open when the valve seat moves to be limited by the rear end of the jet pipe, so that the gas from the gas pipe is jetted to the gun head 30 of the filling equipment through the jet pipe, and the stage type elastic valve combination is continuously moved to the next position under the action of the reverse force of the rear end of the jet pipe, so that the stage type elastic valve combination is triggered to automatically close.

[0006] As a further optimization, the front end of the jet pipe enters the gun body and is provided with a jet seat surrounding the front end of the periphery of the gun head, and a plurality of jet holes are arranged in the annular array on the jet seat.

[0007] As a further optimization, a joint is arranged on the gas pipe, and an external gas source is connected to the joint through a hose to provide inert gas to the gas pipe.

[0008] As further preferred, the annular array on the butt joint part of the front end of the gun body is provided with a plurality of leakage holes.

[0009] As further preferred, a through hole is provided from the front end of the valve seat to the rear, a variable-diameter cavity is provided in the rear of the interior of the valve seat and communicates with the through hole, the diameter of the variable-diameter cavity is larger than that of the through hole, the stage-type elastic valve assembly comprises a butt joint pipe which enters into the through hole, a radial hole is provided in the radial position of the butt joint pipe, a thickened part is provided at the rear end of the butt joint pipe, a stepped part which matches the thickened part is provided at the rear end of the through hole; the stage-type elastic valve assembly further comprises a control member which is connected to the rear end of the thickened part, a protruding part is provided at the rear end of the control member, the protruding part extends into the variable-diameter cavity, a spring is connected between the rear end of the control member and the rear end wall of the variable-diameter cavity, and the connecting end of the gas pipe and the valve seat is provided with a controllable pipe which forms a plugging relationship with the protruding part.

[0010] As further preferred, the guide seat is split type, which is composed of a front end part and a rear end part which are detachably combined together, the front end part is provided with a through hole, and the spray pipe is connected into the guide seat through the through hole.

[0011] As further preferred, a positioning guide hole which communicates left and right is provided in the guide seat, the front end of the valve seat is provided with a positioning seat which is slidingly fitted on the hole wall of the positioning guide hole, the front end of the positioning seat is provided with a lead-in part which communicates with the front end of the through hole, and the hole diameter of the lead-in part is larger than the pipe diameter of the spray pipe.

[0012] As further preferred, an annular partition plate of rubber material is provided in the gun body, an annular extension hole is provided in the annular partition plate, and the gun head of the LNG filling equipment passes through the annular partition plate through the annular extension hole.

[0013] The beneficial effects of the present application compared with the prior art are:

[0014] The guide seat is arranged outside the gun body of the filling gun, the self-made valve assembly is arranged in the guide seat, one end of the self-made valve assembly is provided with the air pipe, the other end is provided with the spray pipe, one end of the spray pipe enters the self-made valve assembly and is aligned with the self-made valve assembly, the other end of the spray pipe enters the filling gun and is aligned with the gun head, one end of the air pipe is connected to the self-made valve assembly, and the other end is connected to the locking handle of the filling gun, before the gun head in the gun body is pushed to be inserted into the air inlet of the external equipment, the driving handle is pushed to make the air pipe push the valve seat to move in advance, the self-made valve assembly is driven by the valve seat to move in advance, the stage type elastic valve assembly is arranged in the self-made valve assembly, the stage type elastic valve assembly is automatically opened at this time, the air pipe and the spray pipe are communicated, the external gas enters the gun body through the spray pipe to complete the automatic cleaning of impurities on the gun head, and with the gun head being completely inserted into the air inlet of the external equipment, the stage type elastic valve assembly is automatically closed, the air pipe and the spray pipe are cut off, and the external gas no longer enters the spray pipe, so that the automatic control of the external gas spraying function is realized, the gun head is inserted into the air inlet of the external equipment, the driving handle needs to be operated, the spraying function is linked to the driving handle, and the automatic control of the spraying action is realized through the automatic control of the valve seat, so that the person filling personnel does not need to release one hand to operate the spray pot and other spraying branches, and the person filling personnel does not need to operate the filling gun to be aligned with the air inlet of the external equipment, thereby improving the working efficiency and saving labor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A three-dimensional schematic view of a high-efficiency LNG filling equipment provided for an embodiment of the present application;

[0016] Figure 2 A high-efficiency LNG filling equipment provided for an embodiment of the present application comprises Figure 1 a schematic view from another perspective;

[0017] Figure 3 A high-efficiency LNG filling equipment provided for an embodiment of the present application comprises an end surface schematic view from one end of the driving handle;

[0018] Figure 4 A high-efficiency LNG filling equipment provided for an embodiment of the present application comprises Figure 3 a plane schematic view of A part after being cut open;

[0019] Figure 5 A high-efficiency LNG filling equipment provided for an embodiment of the present application comprises Figure 4 an enlarged schematic view of B part;

[0020] Figure 6 A high-efficiency LNG filling equipment provided for an embodiment of the present application comprises a schematic view from a three-dimensional perspective after being partially cut open.

[0021] In the figure: 10, gun body; 101, leakage hole; 102, annular partition; 20, injection control mechanism; 210, guide seat; 220, self-made valve assembly; 230, valve seat; 2301, through hole; 2302, variable diameter cavity; 2303, butt joint pipe; 2304, radial hole; 2305, thickened part; 2306, stepped part; 2307, control piece; 2308, protruding part; 2309, spring; 2310, controllable pipe; 2311, positioning seat; 2312, lead-in part; 240, gas pipe; 2401, joint; 2101, injection pipe; 2102, injection seat; 2103, injection hole; 2104, through hole; 2105, positioning guide hole; 30, gun head. DETAILED DESCRIPTION

[0022] The above and other embodiments and advantages of the present application will become more apparent from the following description taken in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely part of the present application, but not all of the present application.

[0023] In an embodiment, as shown in the figure: Figures 1-6

[0024] The embodiment provides a high-efficiency LNG filling device, which comprises a gun body 10 and an injection control mechanism 20, the injection control mechanism 20 comprises a guide seat 210 fixed on the gun body 10 and a self-made valve assembly 220 arranged in the guide seat 210, the self-made valve assembly 220 comprises a valve seat 230 sliding in the guide seat 210 and a gas pipe 240 connected to the rear end of the valve seat 230, the rear end of the gas pipe 240 is connected to a driving handle of the filling device, the front end of the guide seat 210 is provided with an injection pipe 2101, the front end of the injection pipe 2101 is connected into the gun body 10 and is aligned with a gun head 30 of the filling device, the rear end of the injection pipe 2101 enters the guide seat 210 and corresponds to the movement direction of the valve seat 230, the valve seat 230 is provided with a stage type elastic valve combination, when the stage type elastic valve combination moves to be limited by the rear end of the injection pipe 2101, the stage type elastic valve combination is triggered to automatically open, so that the gas from the gas pipe 240 is injected to the gun head 30 of the filling device through the injection pipe 2101, when the stage type elastic valve combination continues to move to the next position under the action of the reverse force of the rear end of the injection pipe 2101, the stage type elastic valve combination is triggered to automatically close.

[0025] ​When using the refueling equipment (refueling gun), after pulling it out of the gas station and aligning the front end of the gun body 10 with the filling port of the external equipment (external vehicle or gas storage tank), the traditional method is for the refueling personnel to hold the refueling equipment with one hand and use the other hand to spray air onto the front end of the nozzle 30 inside the gun body 10. This removes any impurities that may be attached to the nozzle 30, preventing them from entering the external equipment with the gas during refueling. It also prevents impurities from interfering with the proper connection between the nozzle 30 and the filling port of the external equipment, and reduces static electricity to prevent accidents. However, this cleaning method requires the cleaning personnel to hold the refueling equipment with both hands, resulting in high labor intensity and low efficiency. In this embodiment, the invention provides a spray control mechanism 20 on the gun body 10, which solves this technical problem and improves work efficiency. The refueling personnel should, as far as possible, hold the equipment with both hands. Figure 1 ,or Figure 2 The two drive handles shown are simultaneously pulled forward with both hands, pushing the gun head 30 (the existing drive technology for manual filling guns) forward. This moves the gun head 30 relative to the air inlet of the external device. Simultaneously, the two drive handles also push the air pipe 240 forward, which in turn pushes the valve seat 230 forward, causing it to press against the rear end of the nozzle 2101 and advance for another stroke (e.g., 8 cm). The reaction force from the rear end of the nozzle 2101 on the valve seat 230 causes the staged elastic valve assembly to activate for the first time. At this point, the self-made valve assembly 220 opens, connecting the air pipe 240 and the nozzle 2101. External gas from the air pipe 240 enters the nozzle 2101, and the gun... The nozzle 30 inside the body 10 reaches the spray range of the nozzle 2101 under the push of the drive handle. The gas sprayed from the nozzle 2101 sprays onto the nozzle 30, automatically cleaning the impurities on the nozzle 30. Continue to push the two drive handles, which will continue to push the nozzle 30 forward until the nozzle 30 is inserted into the air inlet of the external equipment. At the same time, the air pipe 240 pushes the valve seat 230 forward. The valve seat 230 attaches to the rear end of the nozzle 2101, causing the staged elastic valve assembly inside the valve seat 230 to retract. At this time, the self-made valve assembly 220 closes, the air pipe 240 and the nozzle 2101 are no longer connected, and the external gas from the air pipe 240 no longer enters the nozzle 2101. The nozzle 2101 stops spraying gas, and the filling gun only adds steam to the external equipment at this time.

[0026] In this embodiment, before filling the gun, in order to clean the impurities on the nozzle 30 in advance, the spray control mechanism 20 is set on the gun body 10. This eliminates the need for the filling personnel to use one hand to operate the spray bottle or other spray branches, and also eliminates the need for the filling personnel to use one hand to operate the filling gun to connect with the air inlet of external equipment. This improves work efficiency and saves labor compared to the prior art.

[0027] As Figure 4 , Figure 5 and Figure 6 shown, the specific structure of the stage elastic valve combination is described as follows: a through hole 2301 is formed in the front end of the valve seat 230, a variable diameter cavity 2302 is formed in the rear side of the inside of the valve seat 230, the variable diameter cavity 2302 is in communication with the through hole 2301, the diameter of the variable diameter cavity 2302 is larger than the diameter of the through hole 2301, the stage elastic valve combination includes a butt joint pipe 2303 entering the through hole 2301, a radial hole 2304 is formed in the radial position of the butt joint pipe 2303, the radial hole 2304 is blocked by the hole wall of the through hole 2301 when it is located in the through hole 2301, the rear end of the butt joint pipe 2303 is provided with a thickened part 2305, the rear end of the through hole 2301 is provided with a stepped part 2306 matching the thickened part 2305; the stage elastic valve combination further includes a control member 2307 connected to the rear end of the thickened part 2305, the rear end of the control member 2307 is provided with a protruding part 2308, the protruding part 2308 extends into the variable diameter cavity 2302, a spring 2309 is connected between the rear end of the control member 2307 and the rear end wall of the variable diameter cavity 2302, and the connecting end of the gas pipe 240 and the valve seat 230 is provided with a controllable pipe 2310 forming a blockage relationship with the protruding part 2308. The working principle of the stage elastic valve combination is described as follows: pulling the driving handle, the driving handle not only pushes the gun head 30 forward, but also pushes the gas pipe 240 forward, the gas pipe 240 pushes the valve seat 230 and all the above-mentioned structures and components in the valve seat 230 forward, wherein the butt joint pipe 2303 moves forward until the front end of the butt joint pipe 2303 contacts the rear end of the nozzle 2101, since the nozzle 2101 is fixed, as the butt joint pipe 2303 continues to advance, the rear end of the nozzle 2101 will provide a right reaction force to the front end of the butt joint pipe 2303, forcing the butt joint pipe 2303 to move right along the through hole 2301, the radial hole 2304 and the control member 2307 are moved right with the butt joint pipe 2303, the radial hole 2304 and the control member 2307 are sent into the variable diameter cavity 2302, at this time the spring 2309 is compressed and shortened by the control member 2307, since the radial hole 2304 on the butt joint pipe 2303 enters the variable diameter cavity 2302 at this time, and the hole diameter size of the variable diameter cavity 2302 is larger than the pipe diameter size of the butt joint pipe 2303, at this time the gas from the gas pipe 240 enters the butt joint pipe 2303 through the radial hole 2304, and at this time the front end of the butt joint pipe 2303 touches the rear end of the nozzle 2101, therefore, at this time the gas enters the nozzle 2101 and is sprayed into the gun head 30 by the nozzle 2101 to complete the impurity cleaning, and it is also the automatic opening principle of the self-made valve assembly 220.

[0028] With the above, as the driving handle is gradually increased in the range of pull, the gun head 30 is inserted into the inflation port of the external device by the driving handle, the valve seat 230 is continuously pushed forward by the gas pipe 240, at this time the spring 2309 is limited compression, the front end of the butt joint pipe 2303 is limited by the rear end of the nozzle 2101, at this time only the valve seat 230 moves forward, especially the valve seat 230 with the through hole 2301 and the variable diameter cavity 2302 continues to move forward, until the controllable pipe 2310 is blocked on the protruding part 2308, the gas from the gas pipe 240 is blocked, and no longer enters the variable diameter cavity 2302, and no longer enters the butt joint pipe 2303, and no longer sprays the butt joint pipe 2303 to the gun head 30 of the filling device, at this time the gun head 30 has been inserted into the inflation port of the external device after the gas cleaning, so it does not need to clean the gas, and it is also the automatic closing principle of the self-made valve assembly 220.

[0029] With the above, when the filling gun is removed, the driving handle is pulled in the reverse direction, the gas pipe 240 is pulled back by the driving handle, the valve seat 230 and all structures and components on the valve seat 230 are pulled back by the gas pipe 240, especially the front end of the butt joint pipe 2303 is separated from the rear end of the nozzle 2101, the front end of the butt joint pipe 2303 loses the limitation, the spring 2309 releases the length, the control member 2307 is pushed forward in the reverse direction, the butt joint pipe 2303 is pushed forward by the control member 2307, the radial hole 2304 on the butt joint pipe 2303 is retracted into the through hole 2301 and is closed by the hole wall of the through hole 2301, the protruding part 2308 is reset forward to separate from the controllable pipe 2310, the external gas enters the variable diameter cavity 2302 again through the gas pipe 240 and the controllable pipe 2310, and is stored, waiting for the next use.

[0030] With the above, by setting the self-made valve assembly 220, the filling gun does not need to be cleaned in advance by the filling personnel, and the self-made valve assembly 220 adopts the stage type elastic valve combination composed of two front and back doll type valve body units, which realizes the opening and closing controlled by the same movement direction, greatly improves the convenience in operation, and the valve seat 230 slides in the positioning guide hole 2105 of the guide seat 210 through the front positioning seat 2311, and the butt joint pipe 2303 slides in the through hole 2301 to form stable guidance, and ensures that the relative ends of the butt joint pipe 2303 and the nozzle 2101 can be quickly and accurately butted.

[0031] As Figure 4 , Figure 5As shown, the front end of the positioning seat 2311 is provided with a lead-in part 2312 which is communicated with the front end of the through hole 2301, the hole diameter of the lead-in part 2312 is larger than the pipe diameter of the spray pipe 2101, when the positioning seat 2311 moves forward, the lead-in part 2312 makes the rear end of the spray pipe 2101 abut against the front end of the butt joint pipe 2303, in actual assembly, a sealing ring can be arranged in the lead-in part 2312 or the rear end of the spray pipe 2101, so as to improve the sealing performance when abutting.

[0032] In another embodiment, as shown in Figure 3 , Figure 6 the front end of the spray pipe 2101 enters the gun body 10 and is provided with a spray seat 2102 which surrounds the front end of the gun head 30, a plurality of spray holes 2103 are arranged in the annular array of the spray seat 2102;

[0033] In this embodiment, when the driving handle is pulled to push the gun head 30 to move forward, when the gun head 30 does not reach the surrounding range of the spray seat 2102, the driving handle will further push the valve seat 230 at the front end of the air pipe 240 to the rear end of the spray pipe 2101, the rear end of the spray pipe 2101 is fixed, and the gun head 30 and the valve seat 230 continue to move forward with the pulling range of the driving handle, the valve seat 230 is subjected to the reaction force of the rear end of the spray pipe 2101 to complete a stage elastic valve combination action, at this time, the self-made valve assembly 220 is opened, the spray pipe 2101 sprays gas, the gas enters the spray seat 2102 and is sprayed outward through the spray holes 2103, as the pulling range of the driving handle becomes larger, the gun head 30 continues to move forward to the surrounding range of the spray seat 2102, the gas sprayed by the spray holes 2103 is sprayed to the gun head 30, so that the impurities on the gun head 30 are cleaned downward, the arrangement of the spray seat 2102 and the spray holes 2103 improves the spraying area and the cleaning efficiency.

[0034] It needs to be further explained that, as shown in Figure 2 the air pipe 240 is provided with a connector 2401, an external gas source is connected to the connector 2401 through a hose, so as to provide inert gas to the air pipe 240. In actual use, the outer end of the connector 2401 is connected to the hose, and the outer end of the hose is connected to the source of the inert gas, the inert gas is used as the gas medium for cleaning impurities, so that the inert protection function is formed in the clamping cavity of the gun head 30 and the gun body 10, when the gun head 30 is inserted into the inflation port of an external device, the friction generated by the insertion can be prevented to induce accidents, especially the flame retardant and explosion-proof protection effect for the human body side is improved, and the safety is improved.

[0035] A plurality of leakage holes 101 are formed in the annular array on the butt joint portion of the front end of the gun body 10, and the injection hole 2103 is formed obliquely to the direction of the leakage hole 101. According to the use principle of the filling gun, the front end of the gun body 10 is clamped on an external device, the inflation port of the external device is buckled in the gun body 10, the gun head 30 moves in the direction of the inflation port under the driving of the handle, and is finally inserted into the inflation port. In the present application, the outer wall surface of the gun head 30 will be cleaned by inert gas in advance before it is inserted into the inflation port, the impurities cleaned are blown by the injection hole 2103 to the leakage hole 101, and finally discharged from the leakage hole 101.

[0036] The guide base 210 is split type, and is composed of a front end portion and a rear end portion which are detachably combined together. The front end portion is provided with a through hole 2104, and the injection tube 2101 is connected to the guide base 210 through the through hole 2104.

[0037] The gun body 10 is provided with an annular partition plate 102 made of rubber, which is provided with an annular insertion hole. The gun head of the LNG filling device passes through the annular partition plate 102 through the annular insertion hole, and the annular partition plate 102 is used to block the impurities from flowing backward, thereby maximizing the discharge of the impurities through the leakage hole 101.

[0038] The above orientation designation does not represent the specific orientation of each component in the present embodiment. The present embodiment is only for the convenience of description of the scheme, and is described relatively by referring to the orientation in the figure. The specific orientation of each component is according to its actual installation and actual use, as well as the orientation description habit of the person skilled in the art. Therefore, it is stated herein.

[0039] The above specific embodiments further illustrate the purposes, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application, and is not used to limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by the person skilled in the art within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high efficiency LNG filling apparatus, characterized by, The utility model relates to a kind of gas injection guns, including gun body (10) and injection control mechanism (20), injection control mechanism (20) includes guide seat (210) fixed on gun body (10) and self-made valve assembly (220) arranged in guide seat (210), self-made valve assembly (220) includes valve seat (230) sliding in guide seat (210) and gas pipe (240) connected at the rear end of valve seat (230), the rear end of gas pipe (240) is connected on the driving handle of filling device, the front end of guide seat (210) is equipped with spray pipe (2101), the front end of spray pipe (2101) is connected into gun body (10) and aims at the gun head (30) of filling device, the rear end of spray pipe (2101) enters guide seat (210) and corresponds in the movement direction of valve seat (230), stage elastic valve combination is equipped in valve seat (230), when stage elastic valve combination moves to be limited by the rear end of spray pipe (2101), stage elastic valve combination is automatically opened by triggering, so that gas from gas pipe (240) is sprayed to the gun head (30) of filling device through spray pipe (2101), when stage elastic valve combination continues to move to next position under the reverse force of the rear end of spray pipe (2101), stage elastic valve combination is automatically closed by triggering; The front end of spray pipe (2101) enters gun body (10) and is equipped with spray seat (2102) around the front end of the periphery of gun head (30), the annular array of spray seat (2102) is equipped with a plurality of spray holes (2103), the front end of valve seat (230) is equipped with through hole (2301) from back, the rear side of the inside of valve seat (230) is equipped with variable-diameter cavity (2302) communicated with through hole (2301), the diameter of variable-diameter cavity (2302) is greater than the diameter of through hole (2301), stage elastic valve combination includes butt joint pipe (2303) into through hole (2301), the radial position of butt joint pipe (2303) is equipped with radial hole (2304), the rear end of butt joint pipe (2303) is equipped with thickening part (2305), the rear end of through hole (2301) is equipped with step part (2306) consistent with thickening part (2305);Stage elastic valve combination further includes control member (2307) connected on the rear end of thickening part (2305), the rear end of control member (2307) is equipped with protruding part (2308), protruding part (2308) is stretched into variable-diameter cavity (2302) from back, spring (2309) is connected between the rear end of control member (2307) and the rear end wall of variable-diameter cavity (2302), the connecting end of gas pipe (240) and valve seat (230) is equipped with controllable pipe (2310) with the plugging relationship with protruding part (2308).

2. The high-efficiency LNG filling apparatus according to claim 1, characterized by Joint (2401) is equipped on gas pipe (240), external gas source is connected on joint (2401) through hose, to provide inert gas to gas pipe (240).

3. The high-efficiency LNG filling apparatus according to claim 2, characterized by The annular array of butt joint part on the front end of gun body (10) is equipped with a plurality of leakage holes (101).

4. The high-efficiency LNG filling apparatus according to claim 3, characterized by The guide base (210) is split type, and is combined by a front end part and a rear end part which are detachable and communicated with each other.

5. The high-efficiency LNG filling apparatus according to claim 4, characterized by The guide base (210) is provided with a left-right communicated positioning guide hole (2105), and the front end of the valve seat (230) is provided with a positioning seat (2311) which is slidably fitted on the hole wall of the positioning guide hole (2105), and the front end of the positioning seat (2311) is provided with a lead-in part (2312) which is communicated with the front end of the through hole (2301), and the diameter of the lead-in part (2312) is larger than the diameter of the spray pipe (2101).

6. The high efficiency LNG filling apparatus according to claim 5, wherein The gun body (10) is provided with an annular partition plate (102) made of rubber, and the annular partition plate (102) is provided with an annular insertion hole, and the gun head of the LNG filling equipment passes through the annular partition plate (102) through the annular insertion hole.

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