Safety anti-leakage protection device for LNG (Liquefied Natural Gas) filling station
By designing a safety and leakage protection device with sealing plugs and spring mechanisms on the LNG filling station, the gas leakage problem caused by pulling and disconnecting the gas pipeline is solved, and environmental protection and safety guarantee are achieved.
Patent Information
- Application Number
- CN202422036956.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-22
AI Technical Summary
After the vehicle is filled with air, if the air refueling tip is not taken out, the gas pipeline may be pulled and disconnected when the vehicle is driving, causing gas leakage and affecting the environment and safety.
A safety protection device for anti-leakage protection of LNG gas stations is designed. By setting up a sealing plug and a spring mechanism, when the gas pipeline is pulled and disengaged, the sealing plug is automatically plugged into the circulation groove, and sealed it through a sealing ring to prevent gas leakage.
It effectively prevents gas leakage, protects the surrounding environment, and avoids potential serious accidents.
Smart Images
Figure CN222992674U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of LNG filling stations, and particularly relates to a safety anti-leakage protection device for an LNG filling station. Background Technique
[0002] An LNG filling station is a filling station that supplies liquefied natural gas (LNG), mainly used to provide fuel for LNG vehicles. As a clean energy supply facility, the LNG filling station not only helps to reduce environmental pollution but also has high economic benefits.
[0003] After the existing LNG filling station finishes refueling a vehicle, there will be a situation where the vehicle drives away without removing the refueling gun head. This will cause the vehicle to pull the pipeline through the refueling gun head, and the pulled pipeline will disconnect from the interface of the LNG filling station, resulting in gas leakage. This not only affects the surrounding environment but also poses a safety hazard and is prone to causing major accidents. Therefore, we propose a safety anti-leakage protection device for an LNG filling station. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a safety anti-leakage protection device for an LNG filling station. By setting a sealing plug, specifically, when the gas transmission pipeline is pulled and separated from the connecting pipe, the fixing frame is pulled away from the pressing block. Subsequently, the sliding rod drives the conical push block to reset upward under the elastic action of the first spring, and then the push plate resets to the right under the elastic action of the second spring. At this time, the sealing plug is inserted into the right side of the flow channel and seals the flow channel through the second sealing ring, preventing gas leakage, protecting the surrounding air from pollution, and avoiding the problem of serious accidents. It solves the problem that when the existing gas transmission pipeline is pulled by a vehicle, it will disconnect from the interface of the LNG filling station, resulting in gas leakage, which not only affects the surrounding environment but also poses a safety hazard and is prone to causing major accidents.
[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:
[0006] The utility model is a safety anti-leakage protection device for an LNG filling station, including an LNG filling station. The left and right sides of the LNG filling station are both inserted with refueling guns. The bottoms of the two refueling guns are both fixedly connected with gas transmission pipelines. The left and right sides of the LNG filling station are both fixedly connected with connecting pipes. A flow channel is opened inside the connecting pipe. A pressing assembly is arranged on the left side of the connecting pipe. A conical shell is arranged inside the flow channel.
[0007] A sealing plug is slidably connected to the right side of the conical shell. An annular groove is formed on the outer surface of the sealing plug, and a second sealing ring is sleeved inside the annular groove. The right side of the sealing plug is adapted to the inner wall of the flow channel. A fixing plate is fixedly connected to the inner wall of the conical shell. A connecting rod is fixedly connected to the left side of the sealing plug. A pushing plate is fixedly connected to the left side of the connecting rod. A second spring is sleeved outside the connecting rod. The left side of the second spring is fixedly connected to the right side of the pushing plate, and the right side of the second spring is fixedly connected to the left side of the fixing plate. The connecting rod penetrates through the fixing plate and extends to the outside, and the connecting rod is slidably connected to the fixing plate.
[0008] Further, a circular sliding groove is formed at the top of the flow channel. Rubber sealing sleeves are fixedly connected to both the top and bottom inner walls of the circular sliding groove. A sliding rod is slidably connected to the inner wall of the rubber sealing sleeve. A convex ring is fixedly connected to the outer surface of the sliding rod. A first spring is fixedly connected to the top of the convex ring, and the top of the first spring is fixedly connected to the top inner wall of the circular sliding groove. A pressing block is fixedly connected to the top of the sliding rod. A socket is formed on the left side of the pressing block. A conical pushing block is fixedly connected to the bottom of the sliding rod.
[0009] Further, the pressing assembly includes a fixing frame. A plug is fixedly connected to the top inside the fixing frame. The left inner ring surface of the fixing frame is fixedly connected to the outer surface of the gas transmission pipeline. A threaded ring is fixedly connected to the left side of the connecting pipe. An extrusion ring is fixedly connected to the outer surface of the gas transmission pipeline. An internal threaded ring is arranged outside the extrusion ring. A first sealing ring is in contact with the opposite sides of the extrusion ring and the threaded ring.
[0010] Further, the inner ring of the internal threaded ring is rotatably connected to the outer surface of the gas transmission pipeline. The right side of the gas transmission pipeline is inserted into the inner wall of the threaded ring, and the inner wall of the internal threaded ring is threadedly connected to the outer surface of the threaded ring.
[0011] Further, a plurality of support plates are fixedly connected to the outer surface of the conical shell. The sides of the plurality of support plates away from the conical shell are fixedly connected to the inner wall of the flow channel. A limiting ring is fixedly connected to the right side of the pushing plate, and the second spring is arranged inside the limiting ring.
[0012] Further, the bottom of the sliding rod penetrates through the conical shell and extends to the inside. The bottom of the conical pushing block is provided with a conical surface. The conical surface at the bottom of the conical pushing block is in contact with the outer surface of the pushing plate. The outer ring surface of the convex ring is in contact with the inner wall of the circular sliding groove. The socket is adapted to the plug, and the top inside the fixing frame is in contact with the top of the pressing block.
[0013] The utility model has the following beneficial effects:
[0014] 1. The utility model is provided with a sealing plug. Specifically, when the gas transmission pipeline is pulled and separated from the connecting pipe, the fixing frame is pulled away from the pressing block. Subsequently, the sliding rod drives the conical push block to reset upward under the elastic action of the first spring, and then the push plate resets to the right under the elastic action of the second spring. At this time, the sealing plug is inserted into the right side of the flow channel and seals the flow channel through the second sealing ring, preventing gas leakage, protecting the surrounding air from pollution, and avoiding serious accidents at the same time.
[0015] 2. The utility model is provided with a pressing component. Specifically, after the pressing block moves below the insertion block, the internal thread ring is rotated clockwise again to continuously move the fixing frame to the right. Subsequently, the insertion block is inserted into the socket on the pressing block. At this time, the fixing frame continuously presses the pressing block to keep the position of the sealing plug, so that the right side of the flow channel is always in an open state, facilitating gas transmission.
[0016] Of course, when implementing any product of the utility model, it is not necessarily required to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;
[0019] Figure 2 It is a front sectional view structure diagram of the connecting pipe of the present utility model;
[0020] Figure 3 For the present utility model Figure 2 An enlarged structure diagram of A in it;
[0021] Figure 4 For the present utility model Figure 2 An enlarged structure diagram of B in it;
[0022] Figure 5 It is a schematic diagram of the conical shell structure of the present utility model;
[0023] Figure 6 It is a schematic diagram of the overall structure of the sealing plug of the present utility model.
[0024] In the drawings, the list of components represented by each reference numeral is as follows:
[0025] 1. LNG filling station; 11. Fueling gun; 111. Gas transmission pipeline; 112. Extrusion ring; 113. Internal thread ring; 114. Sealing ring I; 12. Connecting pipe; 121. Flow channel; 122. Circular chute; 221. Rubber sealing sleeve; 222. Slide bar; 223. Convex ring; 224. Spring I; 225. Conical push block; 123. Pressing block; 124. Socket; 13. Pressing component; 131. Fixed bracket; 311. Insert block; 14. Conical shell; 141. Sealing plug; 411. Sealing ring II; 412. Connecting rod; 413. Push plate; 414. Limit ring; 415. Spring II; 142. Fixed plate; 143. Support plate; 15. Thread ring. Detailed implementation manners
[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0027] Please refer to Figures 1-6 As shown in the figure, the present utility model is a safety anti-leakage protection device for an LNG filling station, including an LNG filling station 1. Fueling guns 11 are inserted on both the left and right sides of the LNG filling station 1. Gas transmission pipelines 111 are fixedly connected to the bottoms of both fueling guns 11. Connecting pipes 12 are fixedly connected to both the left and right sides of the LNG filling station 1. A flow channel 121 is opened inside the connecting pipe 12. A pressing component 13 is arranged on the left side of the connecting pipe 12. A conical shell 14 is arranged inside the flow channel 121;
[0028] A sealing plug 141 is slidably connected to the right side of the conical shell 14. An annular groove is formed on the outer surface of the sealing plug 141, and a second sealing ring 411 is sleeved inside the annular groove. The right side of the sealing plug 141 is adapted to the inner wall of the flow channel 121. A fixing plate 142 is fixedly connected to the inner wall of the conical shell 14. A connecting rod 412 is fixedly connected to the left side of the sealing plug 141. A push plate 413 is fixedly connected to the left side of the connecting rod 412. A second spring 415 is sleeved outside the connecting rod 412. The left side of the second spring 415 is fixedly connected to the right side of the push plate 413, and the right side of the second spring 415 is fixedly connected to the left side of the fixing plate 142. The connecting rod 412 passes through the fixing plate 142 and extends to the outside, and the connecting rod 412 is slidably connected to the fixing plate 142. By providing the sealing plug 141, specifically, when the gas transmission pipeline 111 is pulled and separated from the connecting pipe 12, the fixing frame 131 is pulled away from the pressing block 123. Subsequently, the sliding rod 222 drives the conical push block 225 to reset upward under the elastic action of the first spring 224. Then, the push plate 413 resets to the right under the elastic action of the second spring 415. At this time, the sealing plug 141 is inserted into the right side of the flow channel 121 and seals the flow channel 121 through the second sealing ring 411, preventing gas leakage, protecting the surrounding air from pollution, and avoiding the problem of serious accidents at the same time.
[0029] A circular sliding groove 122 is formed at the top of the flow channel 121. Rubber sealing sleeves 221 are fixedly connected to both the top and bottom of the inner wall of the circular sliding groove 122. A sliding rod 222 is slidably connected to the inner wall of the rubber sealing sleeve 221. A convex ring 223 is fixedly connected to the outer surface of the sliding rod 222. A first spring 224 is fixedly connected to the top of the convex ring 223, and the top of the first spring 224 is fixedly connected to the top inner wall of the circular sliding groove 122. A pressing block 123 is fixedly connected to the top of the sliding rod 222. An insertion port 124 is formed on the left side of the pressing block 123. A conical push block 225 is fixedly connected to the bottom of the sliding rod 222. The sliding rod 222 slides within the rubber sealing sleeve 221, and the rubber sealing sleeve 221 is used to play a sealing role to prevent gas leakage.
[0030] The pressing assembly 13 includes a fixing frame 131. At the top inside the fixing frame 131, a plug 311 is fixedly connected. On the inner surface of the left inner ring of the fixing frame 131, the outer surface of the gas transmission pipeline 111 is fixedly connected. On the left side of the connecting pipe 12, a threaded ring 15 is fixedly connected. On the outer surface of the gas transmission pipeline 111, a pressing ring 112 is fixedly connected. An internal threaded ring 113 is arranged on the outer side of the pressing ring 112. On the side where the pressing ring 112 and the threaded ring 15 correspond to each other, a sealing ring I 114 is in contact. By setting the pressing assembly 13, specifically, after the pressing block 123 moves below the plug 311, the internal threaded ring 113 is rotated clockwise again, so that the fixing frame 131 continuously moves to the right, and then the plug 311 is inserted into the socket 124 on the pressing block 123. At this time, the fixing frame 131 will continuously press the pressing block 123 to keep the position of the sealing plug 141, so that the right side of the flow channel 121 is always in an open state, facilitating the gas transmission.
[0031] The inner ring of the internal threaded ring 113 is rotatably connected to the outer surface of the gas transmission pipeline 111. The right side of the gas transmission pipeline 111 is inserted into the inner wall of the threaded ring 15. The inner wall of the internal threaded ring 113 is threadedly connected to the outer surface of the threaded ring 15. Through the connection between the internal threaded ring 113 and the threaded ring 15, continuously rotating the internal threaded ring 113 clockwise drives the pressing ring 112 to move to the right. When the pressing ring 112 is in close contact with the threaded ring 15 through the sealing ring I 114, the fixation of the gas transmission pipeline 111 can be completed.
[0032] A plurality of support plates 143 are fixedly connected to the outer surface of the conical shell 14. On the side of the plurality of support plates 143 away from the conical shell 14, they are fixedly connected to the inner wall of the flow channel 121. A limiting ring 414 is fixedly connected to the right side of the push plate 413. The second spring 415 is arranged inside the limiting ring 414. After the push plate 413 is reset, the limiting ring 414 contacts the fixing plate 142 to limit the push plate 413, so that the push plate 413 is in the position of the bottom conical surface of the conical push block 225, facilitating the conical push block 225 to push the push plate 413 again.
[0033] The bottom of the sliding rod 222 penetrates through the conical shell 14 and extends to the inside. The bottom of the conical push block 225 is set as a conical surface. The bottom conical surface of the conical push block 225 contacts the outer surface of the push plate 413. The outer surface of the convex ring 223 contacts the inner wall of the circular sliding groove 122. The socket 124 is adapted to the plug 311. The top inside the fixing frame 131 contacts the top of the pressing block 123. Since the bottom of the conical push block 225 is set as a conical surface, when the conical push block 225 moves downward, it will smoothly push the push plate 413 to the left.
[0034] A specific application of this embodiment is:
[0035] Insert the gas transmission pipeline 111 into the threaded ring 15. Then, thread the internal threaded ring 113 onto the threaded ring 15. The internal threaded ring 113 will push the extrusion ring 112, and at the same time, the extrusion ring 112 will push the gas transmission pipeline 111, causing the gas transmission pipeline 111 to move into the threaded ring 15. When the insertion block 311 on the fixing frame 131 moves to the position of the pressing block 123, stop rotating the internal threaded ring 113. Then, press the pressing block 123 downward, and the sliding rod 222 will move downward together. The sliding rod 222 slides within the rubber sealing sleeve 221, and the rubber sealing sleeve 221 is used to play a sealing role to prevent gas leakage. At the same time, the sliding rod 222 will drive the convex ring 223 to move downward together and stretch the first spring 224. The bottom of the sliding rod 222 drives the conical push block 225 to move downward. Since the bottom of the conical push block 225 is provided with a conical surface, it will push the push plate 413 to the left. The push plate 413 drives the sealing plug 141 to move to the left through the connecting rod 412. The connecting rod 412 slides at the center of the fixing plate 142. At the same time, the push plate 413 will stretch the second spring 415. After the sealing plug 141 moves to the left, it will open the right side of the flow channel 121 to allow gas to flow. When the pressing block 123 moves below the insertion block 311, rotate the internal threaded ring 113 clockwise again to make the fixing frame 131 continue to move to the right. Then, insert the insertion block 311 into the socket 124 on the pressing block 123. When the extrusion ring 112 is in close contact with the threaded ring 15 through the first sealing ring 114, the fixing of the gas transmission pipeline 111 is completed. At this time, the fixing frame 131 will continuously press the pressing block 123 to keep the position of the sealing plug 141. When the gas transmission pipeline 111 is pulled and separated from the connecting pipe 12, the fixing frame 131 is pulled away from the pressing block 123, releasing the fixation of the pressing block 123. Then, the sliding rod 222 is elastically reset upward under the action of the first spring 224, and the conical push block 225 is reset upward and away from the push plate 413. Then, the push plate 413 is elastically reset to the right under the action of the second spring 415 and drives the sealing plug 141 to move to the right and reset. At this time, the sealing plug 141 is inserted into the right side of the flow channel 121, and the surface of the second sealing ring 411 contacts the inner wall of the flow channel 121, thereby sealing the flow channel 121 to prevent gas leakage, protecting the surrounding air from pollution, and avoiding the problem of serious accidents. At the same time, after the push plate 413 is reset, the limit ring 414 contacts the fixing plate 142 to limit the push plate 413, making the push plate 413 in the position of the conical surface at the bottom of the conical push block 225, facilitating the conical push block 225 to push the push plate 413 again.
[0036] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
[0037] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.
Claims
1. A safety anti-leakage protection device for an LNG filling station, comprising an LNG filling station (1), wherein a filling gun (11) is plugged into the left and right sides of the LNG filling station (1), and the bottoms of the two filling guns (11) are fixedly connected to a gas pipeline (111), characterized in that: The left and right sides of the LNG filling station (1) are both fixedly connected with a connecting pipe (12), a circulation groove (121) is provided inside the connecting pipe (12), a pressing assembly (13) is provided on the left side of the connecting pipe (12), and a conical shell (14) is provided inside the circulation groove (121); The right side of the conical shell (14) is slidably connected to a sealing plug (141), an annular groove is provided on the outer surface of the sealing plug (141), a sealing ring 2 (411) is sleeved inside the annular groove, the right side of the sealing plug (141) is adapted to the inner wall of the circulation groove (121), the inner wall of the conical shell (14) is fixedly connected to a fixing plate (142), the left side of the sealing plug (141) is fixedly connected to a connecting rod (412), the left side of the connecting rod (412) is fixedly connected to a push plate (413), the outer side of the connecting rod (412) is sleeved with a spring 2 (415), the left side of the spring 2 (415) is fixedly connected to the right side of the push plate (413), the right side of the spring 2 (415) is fixedly connected to the left side of the fixing plate (142), the connecting rod (412) passes through the fixing plate (142) and extends to the outside, and the connecting rod (412) is slidably connected to the fixing plate (142).
2. The LNG filling station safety anti-leakage protection device according to claim 1 is characterized in that: A circular slide groove (122) is provided at the top of the circulation groove (121), and a rubber sealing sleeve (221) is fixedly connected to the top and bottom of the inner wall of the circular slide groove (122), and a sliding rod (222) is slidably connected to the inner wall of the rubber sealing sleeve (221), and a convex ring (223) is fixedly connected to the outer surface of the sliding rod (222), and a spring 1 (224) is fixedly connected to the top of the convex ring (223), and the top of the spring 1 (224) is fixedly connected to the top of the inner wall of the circular slide groove (122), and a pressure block (123) is fixedly connected to the top of the sliding rod (222), and a socket (124) is provided on the left side of the pressure block (123), and a conical push block (225) is fixedly connected to the bottom of the sliding rod (222).
3. The LNG filling station safety anti-leakage protection device according to claim 2 is characterized in that: The pressing assembly (13) comprises a fixing frame (131), an insert block (311) is fixedly connected to the top of the inner side of the fixing frame (131), the inner ring surface on the left side of the fixing frame (131) is fixedly connected to the outer surface of the gas pipeline (111), a threaded ring (15) is fixedly connected to the left side of the connecting pipe (12), an extrusion ring (112) is fixedly connected to the outer surface of the gas pipeline (111), an internal threaded ring (113) is arranged on the outer side of the extrusion ring (112), and a sealing ring (114) is in contact with the corresponding side of the extrusion ring (112) and the threaded ring (15).
4. The LNG filling station safety anti-leakage protection device according to claim 3 is characterized in that: The inner ring of the internal threaded ring (113) is rotatably connected to the outer surface of the gas pipeline (111), the right side of the gas pipeline (111) is plugged into the inner wall of the threaded ring (15), and the inner wall of the internal threaded ring (113) is threadedly connected to the outer surface of the threaded ring (15).
5. The LNG filling station safety anti-leakage protection device according to claim 4 is characterized in that: A plurality of support plates (143) are fixedly connected to the outer surface of the conical shell (14); a side of the plurality of support plates (143) away from the conical shell (14) is fixedly connected to the inner wall of the circulation groove (121); a right side of the push plate (413) is fixedly connected to a limit ring (414); and the second spring (415) is arranged inside the limit ring (414).
6. The LNG filling station safety anti-leakage protection device according to claim 4 is characterized in that: The bottom of the slide rod (222) passes through the conical shell (14) and extends to the inside. The bottom of the conical push block (225) is set as a conical surface. The conical surface of the bottom of the conical push block (225) contacts the outer surface of the push plate (413).
7. The LNG filling station safety anti-leakage protection device according to claim 4 is characterized in that: The outer ring surface of the convex ring (223) contacts the inner wall of the circular slide groove (122), the socket (124) is matched with the plug block (311), and the inner top of the fixing frame (131) contacts the top of the pressing block (123).