A gas supplement device for a liquefied natural gas bottle for vehicle
Patent Information
- Application Number
- CN202522081525.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-09-28
AI Technical Summary
[0005]为了弥补以上不足，本实用新型提供了一种车用液化天然气瓶的补气装置，旨在改善现有技术中进而导致补气管道堵塞、控制阀门故障，影响补气装置的正常运行的问题
1、本实用新型中，外部气体经外框进气孔进入，流经滤网拦截杂质实现过滤，滤网通过导向槽便捷装卸，防护垫增强内壁密封性，圆孔便于操作人员取出滤网维护，过滤后的气体经外框出气孔回到进气管完成输送，盖板组件中顶板遮挡顶部开口防杂物进入，锁定组件锁定盖板确保过滤过程结构稳定，整体实现高效过滤与便捷维护。
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Figure CN224743302U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas replenishment device technology, and in particular to a gas replenishment device for vehicle liquefied natural gas cylinders. Background Technology
[0002] The vehicle liquefied natural gas (LNG) cylinder replenishment device is a key piece of equipment specifically designed to replenish LNG cylinders in vehicles. It is used in the field of vehicles that use LNG as fuel. When the amount of LNG in the vehicle's LNG cylinder is insufficient to meet the normal operating requirements of the engine, this device can connect an external gas source to the vehicle's LNG cylinder to replenish the natural gas and ensure the vehicle's continuous operation.
[0003] Traditional vehicle liquefied natural gas (LNG) cylinder refueling devices mainly consist of refueling pipes, connectors, and control valves. In use, the refueling device is first connected to an external gas source and the vehicle's LNG cylinder via the connector, and then the control valve is opened, allowing external natural gas to flow into the vehicle's LNG cylinder through the refueling pipes. However, these traditional refueling devices lack a filtration mechanism, allowing impurities and moisture from the external gas source to directly enter the LNG cylinder along with the natural gas. This not only contaminates the gas inside the cylinder but also adversely affects the combustion efficiency and lifespan of the subsequent engine.
[0004] The existing solution involves adding a filter to the gas supply pipeline of the gas supply device. The external natural gas is filtered before entering the liquefied natural gas cylinder. However, since the filter only uses a single-layer filter structure, it is not effective in removing fine impurities and trace amounts of moisture. When natural gas containing fine impurities and trace amounts of moisture enters the liquefied natural gas cylinder for a long time, it will gradually accumulate inside the cylinder, leading to blockage of the gas supply pipeline, malfunction of the control valve, and affecting the normal operation of the gas supply device. Therefore, a gas supply device for vehicle liquefied natural gas cylinders is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a gas replenishment device for vehicle liquefied natural gas cylinders, aiming to improve the problems in the prior art that lead to blockage of the gas replenishment pipeline, failure of the control valve, and affect the normal operation of the gas replenishment device.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gas replenishment device for a vehicle liquefied natural gas cylinder, comprising a container bottle, a circular rail fixedly connected to the top of the container bottle, an air inlet pipe connected to the inner wall of the circular rail, a filter mechanism provided on the outer wall of the air inlet pipe, a gas delivery pipe connected to the top of the container bottle, and a shock-absorbing mechanism provided on the outer wall of the gas delivery pipe. The filtration mechanism includes an outer frame, the inner wall of which is fixedly connected to the outer wall of the air inlet pipe. A fixing component is provided on the rear side of the outer frame. An air inlet is provided on the left side of the outer wall of the outer frame, and an air outlet is provided on the right side of the outer wall of the outer frame. A guide groove is provided on the inner wall of the outer frame. A filter screen is slidably connected to the inner wall of the outer frame. A protective pad is slidably connected to the inner wall of the outer frame. Two round holes are provided on the outer wall of the protective pad. A frame groove is provided on the inner wall of the outer frame. A cover plate assembly is provided on the top of the outer frame, and two locking components are provided on the top of the outer frame.
[0007] As a further description of the above technical solution: The shock-absorbing mechanism includes a reinforcing base, the inner wall of which is threaded to the outer wall of the gas supply pipe. A spring washer is slidably connected to the outer wall of the gas supply pipe. A main nut is threaded to the outer wall of the gas supply pipe, and a secondary nut is threaded to the outer wall of the gas supply pipe. A buffer pad is fixedly connected to the outer wall of the gas supply pipe, and a ring is fixedly connected to the outer wall of the buffer pad. A support column is fixedly connected to the bottom of the outer wall of the ring, and an installation component is provided at the bottom of the support column.
[0008] As a further description of the above technical solution: The fixing assembly includes a fixing plate, the bottom of which is fixedly connected to the top of the container bottle, and the inner wall of the fixing plate is threaded with multiple screws.
[0009] As a further description of the above technical solution: The cover plate assembly includes a top plate, the outer wall of which is slidably connected to the inner wall of the outer frame, and a handle is fixedly connected to the top of the top plate.
[0010] As a further description of the above technical solution: Both locking components include a fixing block, the bottom of both fixing blocks is rotatably connected to the top of the outer frame, and a rotating block is fixedly connected to the outer wall of both fixing blocks.
[0011] As a further description of the above technical solution: The mounting assembly includes a base plate, the bottom of which is fixedly connected to the inner wall of the circular railing, and the inner wall of the base plate is fixedly connected to two fixing pins.
[0012] As a further description of the above technical solution: The outer walls of the two fixing pins are fixedly connected to the inner wall of the circular rail, and the outer walls of the two screws are threadedly connected to the inner wall of the container bottle.
[0013] As a further description of the above technical solution: A valve is fixedly connected to the outer wall of the gas delivery pipe, and a controller is fixedly connected to the top of the container bottle.
[0014] This utility model has the following beneficial effects: 1. In this utility model, external gas enters through the air inlet of the outer frame, flows through the filter screen to intercept impurities and achieve filtration. The filter screen is easily installed and removed through the guide groove. The protective pad enhances the sealing of the inner wall. The round hole makes it easy for operators to remove the filter screen for maintenance. The filtered gas returns to the air inlet pipe through the air outlet of the outer frame to complete the delivery. The top plate in the cover plate assembly blocks the top opening to prevent foreign objects from entering. The locking assembly locks the cover plate to ensure the structural stability of the filtration process. The whole system achieves efficient filtration and convenient maintenance.
[0015] 2. In this utility model, when vibration occurs, the main nut is fixed by threads, and the secondary nut further locks the main nut to prevent it from loosening, so as to maintain the elastic buffering effect of the spring washer, directly absorb the vibration of the gas pipeline and reduce its transmission. At the same time, the buffer pad fixed on the outer wall of the gas pipeline can absorb the remaining vibration a second time, significantly enhancing the shockproof performance. The buffer pad is connected to the support column through the outer wall ring, and the bottom of the support column is fixed by the mounting components, ultimately achieving efficient shockproof protection for the gas pipeline and effectively ensuring the stable operation of the gas pipeline. Attached Figure Description
[0016] Figure 1 This is a perspective view of a gas replenishment device for a vehicle-mounted liquefied natural gas cylinder proposed in this utility model; Figure 2 This is a front view of a gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to the present invention. Figure 3 This is an exploded view of the filter mechanism of a gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to the present invention. Figure 4 This is an exploded view of the shockproof mechanism of a gas replenishment device for a vehicle-mounted liquefied natural gas cylinder proposed in this utility model. Figure 5 This is a schematic diagram of the installation components of a gas replenishment device for a vehicle-mounted liquefied natural gas cylinder proposed in this utility model.
[0017] Legend: 1. Container bottle; 2. Circular grille; 3. Air inlet pipe; 4. Filtering mechanism; 401. Outer frame; 402. Fixing assembly; 4021. Fixing plate; 4022. Screw; 403. Air inlet; 404. Air outlet; 405. Guide groove; 406. Filter screen; 407. Protective pad; 408. Circular hole; 409. Frame groove; 410. Cover plate assembly; 4101. Top plate; 4102. Handle; 411. Locking assembly; 4111. Fixing block; 4112. Rotating block; 5. Air supply pipe; 6. Shockproof mechanism; 601. Reinforcing rib base; 602. Spring washer; 603. Main nut; 604. Secondary nut; 605. Buffer pad; 606. Ring; 607. Support column; 608. Mounting assembly; 6081. Base plate; 6082. Fixing pin; 7. Valve; 8. Controller. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 This utility model provides an embodiment of a vehicle liquefied natural gas (LNG) cylinder refilling device, including a container cylinder 1, which stores LNG and provides a gas source for refilling. A circular railing 2 is fixedly connected to the top of the container cylinder 1, which provides installation support for other components. An air inlet pipe 3 is connected to the inner wall of the circular railing 2, which can deliver external gas to the container cylinder 1 to realize the refilling function. A filter mechanism 4 is provided on the outer wall of the air inlet pipe 3, which can filter impurities in the gas entering the air inlet pipe 3 to prevent impurities from affecting the use of the device. A gas delivery pipe 5 is connected to the top of the container cylinder 1, which can deliver the filtered gas to the container cylinder 1. A shock-absorbing mechanism 6 is provided on the outer wall of the gas delivery pipe 5, which can reduce the vibration of the gas delivery pipe 5 during vehicle operation and protect the structural stability of the gas delivery pipe 5. The filter mechanism 4 includes an outer frame 401, which provides a mounting carrier for other components of the filter mechanism 4, ensuring orderly assembly of each component. The inner wall of the outer frame 401 is fixedly connected to the outer wall of the air inlet pipe 3. A fixing component 402 is provided on the rear side of the outer frame 401, which can fix the outer frame 401 in a designated position, enhancing the overall stability of the filter mechanism 4. An air inlet 403 is provided on the left side of the outer wall of the outer frame 401, which can be connected to the air inlet pipe 3 to allow external gas to enter the interior of the outer frame 401, providing a gas passage for filtration. An outlet is provided on the right side of the outer wall of the outer frame 401. The vent 404 allows filtered gas to exit from the outer frame 401 to the inlet pipe 3, completing the filtration and delivery process. A guide groove 405 is provided on the inner wall of the outer frame 401, guiding the sliding of the filter screen 406 for easy installation and disassembly. The filter screen 406 is slidably connected to the inner wall of the outer frame 401, intercepting impurities in the gas and achieving gas filtration. A protective pad 407 is slidably connected to the inner wall of the outer frame 401, enhancing the sealing of the inner wall. Two round holes 408 are provided on the outer wall of the protective pad 407. 408 allows for easy removal by operators. The inner wall of the outer frame 401 has a frame groove 409, which provides space for the installation of the cover plate assembly 410. The top of the outer frame 401 is equipped with the cover plate assembly 410, which covers the top opening of the outer frame 401 to prevent external debris from entering. The cover plate assembly 410 includes a top plate 4101, which directly blocks the top opening of the outer frame 401, providing protection. The outer wall of the top plate 4101 is slidably connected to the inner wall of the outer frame 401. A handle 4102 is fixedly connected to the top of the top plate 4101. 4102 provides a gripping area for the operator to easily pull the top plate 4101. The top of the outer frame 401 is provided with two locking components 411. The two locking components 411 can lock the cover plate assembly 410 onto the outer frame 401 to ensure that the cover plate assembly 410 is stable in the closed state. Both locking components 411 include a fixing block 4111, which provides mounting support for the rotating block 4112. The bottom of the two fixing blocks 4111 is rotatably connected to the top of the outer frame 401. The outer wall of the two fixing blocks 4111 is fixedly connected to the rotating block 4112, which can lock the top plate 4101. Specifically, a device for replenishing liquefied natural gas (LNG) cylinders for vehicles has a container 1 for holding LNG and providing a gas source. A circular railing 2 is fixedly installed on the top of the container 1 to provide mounting support for other components of the device. An air inlet pipe 3 is connected to the inner wall of the circular railing 2, through which external gas is delivered into the container 1. To prevent impurities from affecting the use of the device, a filter mechanism 4 is installed on the outer wall of the air inlet pipe 3 to filter out impurities in the gas entering the air inlet pipe 3. A gas delivery pipe 5 is also connected to the top of the container 1, through which the filtered gas is delivered into the container 1. To protect the gas delivery pipe 5 and keep the structure stable, a shock-absorbing mechanism 6 is installed on the outer wall of the gas delivery pipe 5 to reduce the vibration experienced by the gas delivery pipe 5 during vehicle operation. The filter mechanism 4 has an outer frame 401, which provides a mounting location for other parts. The inner wall of the outer frame 401 is fixedly connected to the outer wall of the air inlet pipe 3. A fixing component 402 is installed at the rear of the outer frame 401 to fix the outer frame 401 in the desired position, making the entire filter mechanism 4 more stable. An air inlet 403 is opened on the left outer wall of the outer frame 401, which can be connected to the air inlet pipe 3 to allow gas to enter the outer frame 401. An air outlet 404 is opened on the right outer wall of the outer frame 401, allowing the filtered gas to be discharged from the outer frame 401 into the air inlet pipe 3. The outer frame 401 has a guide groove 405 on its inner wall to allow the filter screen 406 to slide, making it easy to install and remove. The filter screen 406 slides onto the inner wall of the outer frame 401, and it can block impurities in the gas, thus filtering the gas. A protective pad 407 also slides onto the inner wall of the outer frame 401, which can improve the sealing effect of the inner wall of the outer frame 401. Two round holes 408 are opened on the outer wall of the protective pad 407 to facilitate the removal of the protective pad 407 by the staff. The inner wall of the outer frame 401 has a groove 409 to provide installation space for the cover plate assembly 410. The cover plate assembly 410 is installed on the top of the outer frame 401 to cover the opening at the top of the outer frame 401, preventing debris from falling into the outer frame 401. The cover plate assembly 410 includes a top plate 4101, which directly blocks the opening at the top of the outer frame 401, providing protection. The outer wall of the top plate 4101 slides onto the inner wall of the outer frame 401, and a handle 4102 is fixedly connected to the top of the top plate 4101, allowing workers to... Hold the handle 4102 to easily pull the top plate 4101. The top of the outer frame 401 is equipped with two locking components 411, which can lock the cover plate component 410 onto the outer frame 401 to ensure that the cover plate component 410 will not loosen when closed. Each locking component 411 has a fixing block 4111, which can provide installation support for the rotating block 4112. The bottom of the two fixing blocks 4111 are connected to the top of the outer frame 401. The outer wall of each fixing block 4111 is also fixedly connected to a rotating block 4112, which can lock the top plate 4101.
[0020] See attached document Figure 1 Appendix Figure 4 and attached Figure 5 The shock-absorbing mechanism 6 includes a reinforcing base 601, which enhances the structural strength of the bottom and provides a stable installation foundation for other components. The inner wall of the reinforcing base 601 is threaded to the outer wall of the air pipe 5. A spring washer 602 is slidably connected to the outer wall of the air pipe 5. The spring washer 602 uses its own elasticity to buffer the vibration received by the air pipe 5 and reduce vibration transmission. A main nut 603 is threaded to the outer wall of the air pipe 5, which ensures stable buffering effect. A secondary nut 604 is threaded to the outer wall of the air pipe 5, which assists the main nut 603 in strengthening the fixing effect and preventing the main nut 603 from loosening. A buffer pad 605 is fixedly connected to the outer wall of the air pipe 5, which further absorbs the vibration of the air pipe 5 and enhances the shock-absorbing performance. The outer wall of the buffer pad 605 is fixedly connected to the outer wall of the air pipe 5. A ring 606 is fixedly connected to the support column 607, providing an installation point for the support column 607. A buffer pad 605 is connected to the support column 607. The support column 607 is fixedly connected to the bottom of the outer wall of the ring 606, supporting the ring 606. An installation component 608 is provided at the bottom of the support column 607. The installation component 608 includes a base plate 6081, which serves as the base carrier for the installation component 608. The base plate 6081 is fixedly connected to the inner wall of the circular railing 2, providing support for the support column 607. Two fixing pins 6082 are fixedly connected to the inner wall of the base plate 6081. The outer walls of the two fixing pins 6082 are fixedly connected to the inner wall of the circular railing 2. The two fixing pins 6082 enhance the connection strength between the base plate 6081 and the circular railing 2, preventing the base plate 6081 from loosening. Specifically, the reinforced base 601 makes the bottom structure more robust, providing a stable mounting base for other parts. The inner wall is threaded onto the outer wall of the air pipe 5, and a sliding spring washer 602 is fitted on the outer wall to cushion vibrations in the air pipe 5, reducing the transmission of vibrations to other areas. A main nut 603 is threaded onto the outer wall of the air pipe 5, providing a vibration damping effect. An auxiliary nut 604 is also threaded onto the outer wall of the air pipe 5, further securing the main nut 603 and preventing it from loosening. A buffer pad 605 is also fixed to the outer wall of the air pipe 5 to further absorb vibrations, enhancing the vibration damping effect. With enhanced performance, a ring 606 is fixedly connected to the outer wall of the buffer pad 605. A support column 607 is fixedly connected to the bottom of the outer wall of the ring 606. The support column 607 can support the ring 606. An installation component 608 is installed at the bottom of the support column 607. There is a base plate 6081 in the installation component 608, which can connect the support column 607 and the circular railing 2. Moreover, the bottom of the base plate 6081 is fixedly connected to the inner wall of the circular railing 2, which can provide support for the support column 607. Two fixing pins 6082 are also fixedly installed on the inner wall of the base plate 6081. The outer walls of the two fixing pins 6082 are also fixedly connected to the inner wall of the circular railing 2, which can make the connection between the base plate 6081 and the circular railing 2 more secure and prevent the base plate 6081 from loosening.
[0021] See attached document Figure 1 Appendix Figure 2 and attached Figure 3 The fixing component 402 includes a fixing plate 4021, which provides an installation base for related components. The bottom of the fixing plate 4021 is fixedly connected to the top of the container bottle 1. Multiple screws 4022 are threadedly connected to the inner wall of the fixing plate 4021. The screws 4022 can further strengthen the connection between the fixing plate 4021 and the container bottle 1. The outer walls of the two screws 4022 are threadedly connected to the inner wall of the container bottle 1. A valve 7 is fixedly connected to the outer wall of the gas supply pipe 5. The valve 7 can control the flow and closure of the gas in the gas supply pipe 5. A controller 8 is fixedly connected to the top of the container bottle 1. The controller 8 can regulate the operating status of the entire device. Specifically, the fixing assembly 402 contains a fixing plate 4021, which provides a place for related parts to be installed. The bottom of the fixing plate 4021 is fixedly installed on the top of the container bottle 1, and several screws 4022 are screwed on the inner wall to make the connection between the fixing plate 4021 and the container bottle 1 more secure. A valve 7 is installed on the outside of the gas supply pipe 5, which can control the flow or closure of the gas in the gas supply pipe 5. A controller 8 is also fixedly installed on the top of the container bottle 1, which can adjust the operation of the entire device.
[0022] Working principle: During gas filtration, external gas enters the interior through the air inlet 403 on the left side of the outer frame 401, and then flows through the filter screen 406 that is slidably installed on the inner wall. The filter screen 406 intercepts impurities in the gas to achieve filtration. The guide groove 405 on the inner wall of the outer frame 401 provides guidance for the installation and removal of the filter screen 406. The protective pad 407 enhances the sealing of the inner wall, and its round hole 408 makes it easy for operators to remove and maintain. The filtered gas returns to the air inlet pipe 3 through the air outlet 404 on the right side of the outer frame 401, completing the delivery. In the cover plate assembly 410 at the top of the outer frame 401, the top plate 4101 covers the top opening to prevent debris from entering, and the two locking components 411 lock the cover plate to ensure structural stability during the filtration process. Furthermore, when vibration occurs, the main nut 603 is fixed by threads, and the secondary nut 604 further locks the main nut 603 to prevent it from loosening, thereby maintaining the elastic buffering effect of the spring washer 602, directly absorbing the vibration of the gas pipe 5 and reducing its transmission. At the same time, the buffer pad 605 fixed to the outer wall of the gas pipe 5 can absorb the remaining vibration a second time, enhancing the shock absorption performance. The buffer pad 605 is connected to the support column 607 through the outer wall ring 606, and the bottom of the support column 607 is fixed by the mounting component 608, thus achieving efficient shock absorption protection for the gas pipe 5.
[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A gas replenishment device for a vehicle-mounted liquefied natural gas cylinder, comprising a receiving cylinder (1), characterized in that: The top of the container (1) is fixedly connected to a circular railing (2), the inner wall of the circular railing (2) is connected to an air inlet pipe (3), the outer wall of the air inlet pipe (3) is provided with a filter mechanism (4), the top of the container (1) is connected to a gas delivery pipe (5), and the outer wall of the gas delivery pipe (5) is provided with a shockproof mechanism (6). The filter mechanism (4) includes an outer frame (401), the inner wall of which is fixedly connected to the outer wall of the air inlet pipe (3), a fixing component (402) is provided on the rear side of the outer frame (401), an air inlet hole (403) is provided on the left side of the outer wall of the outer frame (401), an air outlet hole (404) is provided on the right side of the outer wall of the outer frame (401), a guide groove (405) is provided on the inner wall of the outer frame (401), a filter screen (406) is slidably connected to the inner wall of the outer frame (401), a protective pad (407) is slidably connected to the inner wall of the outer frame (401), two round holes (408) are provided on the outer wall of the protective pad (407), a frame groove (409) is provided on the inner wall of the outer frame (401), a cover plate component (410) is provided on the top of the outer frame (401), and two locking components (411) are provided on the top of the outer frame (401).
2. The gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 1, characterized in that: The shock-absorbing mechanism (6) includes a reinforcing base (601), the inner wall of which is threaded to the outer wall of the gas pipe (5), a spring washer (602) is slidably connected to the outer wall of the gas pipe (5), a main nut (603) is threaded to the outer wall of the gas pipe (5), a secondary nut (604) is threaded to the outer wall of the gas pipe (5), a buffer pad (605) is fixedly connected to the outer wall of the gas pipe (5), a ring (606) is fixedly connected to the outer wall of the buffer pad (605), a support column (607) is fixedly connected to the bottom of the outer wall of the ring (606), and an installation component (608) is provided at the bottom of the support column (607).
3. The gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 1, characterized in that: The fixing component (402) includes a fixing plate (4021), the bottom of which is fixedly connected to the top of the container bottle (1), and the inner wall of the fixing plate (4021) is threaded with a plurality of screws (4022).
4. The gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 1, characterized in that: The cover plate assembly (410) includes a top plate (4101), the outer wall of which is slidably connected to the inner wall of the outer frame (401), and a handle (4102) is fixedly connected to the top of the top plate (4101).
5. A gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 1, characterized in that: Both of the locking components (411) include a fixing block (4111), the bottom of both fixing blocks (4111) is rotatably connected to the top of the outer frame (401), and the outer walls of both fixing blocks (4111) are fixedly connected to a rotating block (4112).
6. A gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 2, characterized in that: The mounting assembly (608) includes a base plate (6081), the bottom of which is fixedly connected to the inner wall of the circular railing (2), and the inner wall of the base plate (6081) is fixedly connected to two fixing pins (6082).
7. A gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 6, characterized in that: The outer walls of the two fixing pins (6082) are fixedly connected to the inner wall of the circular rail (2), and the outer walls of the two screws (4022) are threadedly connected to the inner wall of the container bottle (1).
8. A gas replenishment device for a vehicle-mounted liquefied natural gas cylinder according to claim 1, characterized in that: A valve (7) is fixedly connected to the outer wall of the gas delivery pipe (5), and a controller (8) is fixedly connected to the top of the container (1).