A quick connector for LNG cryogenic loading and unloading arm
By introducing automatic sealing and quick connection mechanisms into the quick connectors for LNG low-temperature loading and unloading arms, the problem of inconvenient sealing after disassembly is solved, and safety and efficiency improvements are achieved during the low-temperature loading and unloading of LNG, which prevents leakage and countercurrent, ensuring that Safe and stable connections.
Patent Information
- Application Number
- CN202411397570.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-10-09
AI Technical Summary
The existing LNG low-temperature loading and unloading arms are not easy to seal after disassembly, resulting in LNG leakage. The leaked gas may cause fire or explosion accidents, threatening the safety of personnel and equipment.
A quick connector for LNG low-temperature loading and unloading arm including an automatic sealing mechanism, a quick connection mechanism and an anti-countercurrent mechanism is designed. The automatic sealing assembly and quick connection assembly are automatically restored to the sealing state during disassembly, preventing LNG leakage, and passing through springs and limits The position rod improves the connection efficiency and ensures stable connection.
It effectively prevents LNG leakage and countercurrent, reduces the risk of fire and explosion, improves connection operation efficiency, and ensures safety and equipment stability during loading and unloading.
Smart Images
Figure CN118896205B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of cryogenic fluid conveying devices, and in particular relates to a quick connector for an LNG cryogenic loading and unloading arm. Background Art
[0002] With the adjustment of the global energy structure and the growing demand for clean energy, liquefied natural gas (LNG) has developed rapidly as an efficient and clean energy. The production, storage, transportation and use of LNG require efficient and safe loading and unloading operations, which puts higher requirements on loading and unloading equipment. In the traditional LNG loading and unloading process, the connection method used is often cumbersome and the connection speed is slow. Therefore, a quick connector for LNG cryogenic loading and unloading arm is needed to meet the needs of the rapid development of the LNG industry.
[0003] However, during use, the existing quick connectors for LNG cryogenic loading and unloading arms are not easy to seal after the quick connectors are disassembled, resulting in LNG leakage. The leaked LNG will quickly gasify to form a flammable mixture. Once it encounters a fire source, it will cause a fire or explosion, posing a serious threat to personnel and equipment. Summary of the invention
[0004] The purpose of the present invention is to provide a quick connector for LNG low-temperature loading and unloading arms. By providing an automatic sealing mechanism, the problem that the loading and unloading arms are difficult to seal after the quick connector is disassembled, thereby causing LNG leakage, and the leaked LNG will quickly vaporize to form a combustible mixture. Once it encounters a fire source, it will cause a fire or explosion, posing a serious threat to personnel and equipment.
[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
[0006] The present invention is a quick connector for LNG cryogenic loading and unloading arm, comprising a connecting pipe, on which an automatic sealing mechanism, two quick connection mechanisms and a backflow prevention mechanism are arranged;
[0007] The lock body is an L-shaped screw cap, an L-shaped screw cap having a lock core and a lock core, and a lock core having a lock core, and a lock core having a lock core.
[0008] Furthermore, a spring 1 is sleeved on the outer wall of the sliding rod, the left side of the spring 1 is fixedly connected to a circular slider 1, the right side of the spring 1 is fixedly connected to a cross support frame 1, the right side extension of the sliding rod is fixedly connected to a limiting plate, the inner wall of the L-shaped rod 1 is fixedly connected to an adapting ring 1, and the circular slider 1 is adapted to the adapting ring 1.
[0009] Furthermore, the second automatic sealing component comprises a second cross support frame fixedly connected to the inner wall of the connecting pipe, a positioning block is fixedly connected to the left side of the first circular slider, and a positioning groove is provided on the left side of the positioning block.
[0010] Furthermore, a connecting rod is fixedly connected to the right side of the cross support frame 2, and the right side of the connecting rod extends into the L-shaped rod 1. An adapter positioning block is fixedly connected to the right side of the connecting rod, and the right side of the adapter positioning block extends into the positioning groove.
[0011] Furthermore, the quick-connect mechanism includes a quick-connect component 1 and a quick-connect component 2, the quick-connect component 1 includes a support block fixedly connected to the outer wall of the connecting tube, the top of the support block is fixedly connected to a sleeve, the inner wall of the sleeve is slidably connected to a circular slider 2, the bottom of the circular slider 2 is fixedly connected to a limiting rod, the bottom of the limiting rod slides and extends outside the sleeve, the bottom of the limiting rod slides through the support block, and the bottom of the limiting rod slides and extends into the connecting tube.
[0012] Furthermore, the second quick-connect assembly includes a pull rod fixedly connected to the top of the second circular slider, the top of the pull rod slides and extends outside the sleeve, a second spring is fixedly connected to the outer wall of the pull rod, the top of the second spring is fixedly connected to the sleeve, the bottom of the second spring is fixedly connected to the second circular slider, the top of the pull rod is fixedly connected to a handle, and the bottom of the handle is fixedly connected to two gaskets.
[0013] Furthermore, the backflow prevention mechanism includes a cross support frame three fixedly connected to the inner wall of the L-shaped rod two, an adapting ring two is fixedly connected to the inner wall of the L-shaped rod two, and a circular slider three is slidably connected to the inner wall of the adapting ring two.
[0014] Furthermore, a telescopic rod is fixedly connected to the bottom of the cross support frame three, the bottom of the telescopic rod is fixedly connected to the circular slider three, a spring three is sleeved on the outer wall of the telescopic rod, the top of the spring three is fixedly connected to the cross support frame three, and the bottom of the spring three is fixedly connected to the circular slider three.
[0015] The present invention has the following beneficial effects:
[0016] 1. By setting up an automatic sealing mechanism, when the L-shaped rod 1 is inserted into the connecting pipe, the connecting rod on the cross support frame 2 will be inserted into the positioning groove on the positioning block through the adapter positioning block, thereby pushing the circular slider 1 to move to the right, and a gap will be generated between the circular slider 1 and the adapter ring 1. The spring 1 will be compressed and generate elastic force due to the rightward movement of the circular slider 1. When the connecting pipe and the L-shaped rod 1 are disassembled, the circular slider 1 will move to the left under the elastic force of the spring 1, and cooperate with the adapter ring 1 to restore the sealing state, thereby avoiding the leakage of LNG during disassembly, so that the sealing state can be automatically restored during disassembly, greatly reducing the risk of LNG leakage. The leaked LNG may cause serious safety accidents such as fire and explosion, posing a huge threat to the safety of life and property, and the automatic sealing function can effectively prevent the occurrence of such dangers;
[0017] 2. By setting a quick-connect mechanism, when it is necessary to splice the connecting pipe and the L-shaped rod one together, the handle can be pulled, and the handle drives the circular slider two to move upward through the pull rod, so that the limit rod is retracted into the sleeve, and when the handle is pulled, the spring two will undergo elastic deformation and generate elastic force. At this time, the L-shaped rod one is inserted into the connecting pipe, and the position is adjusted, and the handle is released. At this time, the circular slider two drives the limit rod to move downward under the action of the elastic force of the spring two, and fixes the L-shaped rod one and the connecting pipe together, so that the efficiency of the connection operation can be greatly improved. Whether it is necessary to quickly connect the equipment in an emergency or when frequent loading and unloading operations are performed, a lot of time can be saved. After the handle is released, the circular slider two drives the limit rod to move downward under the action of the elastic force of the spring two, and firmly fixes the L-shaped rod one and the connecting pipe together, thereby providing a stable connection for the device and ensuring that there will be no accidental loosening or separation during loading and unloading.
[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0021] Figure 2 It is a schematic diagram of the rear side cross-sectional structure of the present invention;
[0022] Figure 3 It is a front side cross-sectional structural schematic diagram of the present invention;
[0023] Figure 4 For the present invention Figure 3 A is a schematic diagram of the enlarged structure of the middle part;
[0024] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure of B;
[0025] Figure 6 For the present invention Figure 3 Schematic diagram of the enlarged structure of C;
[0026] Figure 7 For the present invention Figure 2 Schematic diagram of the enlarged structure of D in the middle;
[0027] Figure 8 For the present invention Figure 3 Schematic diagram of the enlarged structure of E.
[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0029] 1. Connecting pipe; 101. L-shaped rod 1; 102. L-shaped rod 2; 103. L-shaped rod 3; 104. Trapezoidal groove 1; 105. Trapezoidal groove 2; 106. Sealing gasket; 2. Automatic sealing mechanism; 21. Automatic sealing component 1; 211. Cross support frame 1; 212. Sliding rod; 213. Circular slider 1; 214. Spring 1; 215. Limiting piece; 216. Adapter ring 1; 22. Automatic sealing component 2; 221. Cross support frame 2; 222. Positioning block; 2 23. Positioning groove; 224. Connecting rod; 225. Adapter positioning block; 3. Quick-connect mechanism; 31. Quick-connect assembly one; 311. Support block; 312. Sleeve; 313. Round slider two; 314. Limit rod; 32. Quick-connect assembly two; 321. Pull rod; 322. Spring two; 323. Handle; 324. Gasket; 4. Anti-backflow mechanism; 401. Cross support frame three; 402. Adapter ring two; 403. Round slider three; 404. Telescopic rod; 405. Spring three. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] See also Figure 1-Figure 8As shown, the present invention is a quick connector for LNG cryogenic loading and unloading arm, comprising a connecting pipe 1, on which an automatic sealing mechanism 2, two quick connection mechanisms 3 and an anti-backflow mechanism 4 are arranged, an L-shaped rod 1 101 is arranged on the right side of the connecting pipe 1, the top of the L-shaped rod 1 101 is rotatably connected to an L-shaped rod 2 102, the right side of the L-shaped rod 2 102 is rotatably connected to an L-shaped rod 3 103, a trapezoidal rotating groove 1 104 is provided on the top of the L-shaped rod 1 101, the bottom of the L-shaped rod 2 102 is rotatably extended into the trapezoidal rotating groove 1 104, a trapezoidal rotating groove 2 105 is provided on the right side of the L-shaped rod 2 102, and the L-shaped rod 3 103 is rotatably connected to the L-shaped rod 3 103. The left side of the connecting tube 1 is rotatably extended into the trapezoidal rotating groove 2 105, a sealing gasket 106 is arranged between the connecting tube 1 and the L-shaped rod 101, the left side of the sealing gasket 106 contacts the connecting tube 1, and the right side of the sealing gasket 106 contacts the L-shaped rod 101, the automatic sealing mechanism 2 includes an automatic sealing component 1 21 and an automatic sealing component 22, the automatic sealing component 1 21 includes a cross support frame 1 211 fixedly connected to the inner wall of the L-shaped rod 101, a sliding rod 212 is slidably penetrated at the central axis of the cross support frame 211, a circular slider 213 is fixedly connected to the left extension of the sliding rod 212, and the sliding rod A spring 214 is sleeved on the outer wall of 212, the left side of the spring 214 is fixedly connected to the circular slider 213, the right side of the spring 214 is fixedly connected to the cross support frame 211, the right extension of the slide bar 212 is fixedly connected to the limiting plate 215, the inner wall of the L-shaped rod 101 is fixedly connected to the adapting ring 216, the circular slider 213 is adapted to the adapting ring 216, the automatic sealing component 22 includes a cross support frame 221 fixedly connected to the inner wall of the connecting pipe 1, the left side of the circular slider 213 is fixedly connected to the positioning block 222, and the left side of the positioning block 222 is provided with a fixed The right side of the cross support frame 221 is fixedly connected with a connecting rod 224, and the right side of the connecting rod 224 extends into the L-shaped rod 101. The right side of the connecting rod 224 is fixedly connected with an adapter positioning block 225, and the right side of the adapter positioning block 225 extends into the positioning groove 223. By setting up the automatic sealing mechanism 2, the sealing state can be automatically restored during disassembly, which greatly reduces the risk of LNG leakage. Leaked LNG may cause serious safety accidents such as fire and explosion, posing a huge threat to the safety of life and property of personnel, and the automatic sealing function can effectively prevent the occurrence of such dangers.
[0032] The quick-connect mechanism 3 includes a quick-connect component 1 31 and a quick-connect component 2 32. The quick-connect component 1 31 includes a support block 311 fixedly connected to the outer wall of the connecting pipe 1. The top of the support block 311 is fixedly connected to a sleeve 312. The inner wall of the sleeve 312 is slidably connected to a circular slider 2 313. The bottom of the circular slider 2 313 is fixedly connected to a limiting rod 314. The bottom of the limiting rod 314 slides and extends to the outside of the sleeve 312. The bottom of the limiting rod 314 slides and passes through the support block 311. The bottom of the limiting rod 314 slides and extends into the connecting pipe 1. The quick-connect component 2 32 includes a pull rod 321 fixedly connected to the top of the circular slider 2 313. The top of the pull rod 321 slides and extends to the outside of the sleeve 312. The outer wall of the pull rod 321 is fixedly connected to a spring 2 322. The top of the second spring 322 is fixedly connected to the sleeve 312, and the bottom of the second spring 322 is fixedly connected to the second circular slider 313. The top of the pull rod 321 is fixedly connected to a handle 323, and the bottom of the handle 323 is fixedly connected to two gaskets 324. By setting the quick-connect mechanism 3, the efficiency of the connection operation can be greatly improved. Whether it is necessary to quickly connect the equipment in an emergency or when frequent loading and unloading operations are performed, a lot of time can be saved. When the handle 323 is released, the second circular slider 313 drives the limit rod 314 to move downward under the elastic force of the second spring 322, and the L-shaped rod 101 is firmly fixed together with the connecting pipe 1, thereby providing a stable connection for the device and ensuring that there will be no accidental loosening or separation during the loading and unloading process.
[0033] The anti-backflow mechanism 4 includes a cross support frame 3 401 fixedly connected to the inner wall of the L-shaped rod 2 102, an adaptor ring 2 402 is fixedly connected to the inner wall of the L-shaped rod 2 102, a circular slider 3 403 is slidably connected to the inner wall of the adaptor ring 2 402, a telescopic rod 404 is fixedly connected to the bottom of the cross support frame 3 401, the bottom of the telescopic rod 404 is fixedly connected to the circular slider 3 403, a spring 3 405 is sleeved on the outer wall of the telescopic rod 404, the top of the spring 3 405 is fixedly connected to the cross support frame 3 401, and the bottom of the spring 3 405 is fixedly connected to the circular slider 3 403. By setting the anti-backflow mechanism 4, the backflow can be effectively prevented, and serious safety accidents such as explosion and fire caused by the backflow can be avoided, the safety of life and property of personnel can be guaranteed, the pressure in the system can be maintained stable, the normal operation of the equipment can be guaranteed, and the system failure and downtime caused by the backflow can be reduced.
[0034] A specific application of this embodiment is: when in use, first put the device in the corresponding position, connect the left side of the connecting pipe 1 to the storage device, connect the rear side of the L-shaped rod 3 103 to the transportation tool, such as LNG transport ship, tank truck, railway tank truck, etc., pull the handle 323, the handle 323 drives the circular slider 2 313 to move upward through the pull rod 321, so that the limit rod 314 is retracted into the sleeve 312, when the handle 323 is pulled, the spring 2 322 will be elastically deformed and generate elastic force, at this time, the L-shaped rod 101 is inserted into the connecting pipe 1, and the position is adjusted, and the handle 323 is released. At this time, the circular slider 2 313 drives the limit rod 314 to move downward under the action of the elastic force of the spring 2 322 to fix the L-shaped rod 101 to the connecting pipe 1 The two ends of the cross support frame 221 are fixed together, so that the efficiency of the connection operation can be greatly improved. Whether it is necessary to quickly connect the equipment in an emergency or when frequently performing loading and unloading operations, a lot of time can be saved. When the handle 323 is released, the circular slider 213 drives the limit rod 314 to move downward under the elastic force of the spring 222, and the L-shaped rod 101 and the connecting pipe 1 are firmly fixed together, thereby providing a stable connection for the device and ensuring that there will be no accidental loosening or separation during the loading and unloading process. Before the connecting pipe 1 and the L-shaped rod 101 are connected together, there is no gap between the circular slider 113 and the adapter ring 116, so that the device remains sealed. When the L-shaped rod 101 is inserted into the connecting pipe 1, the connection on the cross support frame 221 The rod 224 will be inserted into the positioning groove 223 on the positioning block 222 through the adapter positioning block 225, thereby pushing the circular slider 213 to move rightward, and a gap will be generated between the adapter ring 216, and the spring 214 will be compressed and generate elastic force due to the rightward movement of the circular slider 213. When the connecting pipe 1 and the L-shaped rod 101 are disassembled, the circular slider 213 will move to the left under the elastic force of the spring 214, and cooperate with the adapter ring 216 to restore the sealing state, thereby avoiding the leakage of LNG during disassembly, and enabling the sealing state to be automatically restored during disassembly, thereby greatly reducing the risk of LNG leakage. The leaked LNG may cause serious safety accidents such as fire and explosion, causing huge damage to the lives and property safety. Threat, and the automatic sealing function can effectively prevent such dangers from occurring. When the device is used for transmission, the air pressure in the device will push against the circular slider three 403, forcing the circular slider three 403 to move upward and disengage from the adapter ring two 402, creating a gap between the circular slider three 403 and the adapter ring two 402, and the gas will flow into the transportation vehicle through the gap, and make the telescopic rod 404 and the spring three 405 in a compressed state. When the device is stopped, the air pressure in the device remains balanced, and the circular slider three 403 will be reset under the action of the elastic force of the spring three 405, avoiding the backflow of LNG, making it possible to effectively prevent the backflow and avoid serious safety accidents such as explosion and fire caused by the backflow, thereby protecting the lives and property of personnel and maintaining the pressure stability in the system.Ensure the normal operation of the equipment and reduce system failures and downtime caused by backflow.
[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. A quick connector for an LNG cryogenic loading and unloading arm, comprising a connecting pipe (1), characterized in that: The connecting pipe (1) is provided with an automatic sealing mechanism (2), two quick-connect mechanisms (3) and a backflow prevention mechanism (4); The right side of the connecting tube (1) is provided with an L-shaped rod 1 (101), the top of the L-shaped rod 1 (101) is rotatably connected to an L-shaped rod 2 (102), the right side of the L-shaped rod 2 (102) is rotatably connected to an L-shaped rod 3 (103), the top of the L-shaped rod 1 (101) is provided with a trapezoidal rotation groove 1 (104), the bottom of the L-shaped rod 2 (102) is rotatably extended into the sliding trapezoidal rotation groove 1 (104), the right side of the L-shaped rod 2 (102) is provided with a trapezoidal rotation groove 2 (105), the left side of the L-shaped rod 3 (103) is rotatably extended into the trapezoidal rotation groove 2 (105), the connecting tube (1) and the L-shaped rod A sealing gasket (106) is arranged between the connecting tube (1) and the connecting pipe (1), the left side of the sealing gasket (106) contacts the connecting pipe (1), and the right side of the sealing gasket (106) contacts the L-shaped rod (101), the automatic sealing mechanism (2) comprises an automatic sealing component (21) and an automatic sealing component (22), the automatic sealing component (21) comprises a cross support frame (211) fixedly connected to the inner wall of the L-shaped rod (101), a sliding rod (212) slidably penetrates the central axis of the cross support frame (211), and a circular sliding block (213) is fixedly connected to the left extension of the sliding rod (212); A spring (214) is sleeved on the outer wall of the slide rod (212); the left side of the spring (214) is fixedly connected to a circular slider (213); the right side of the spring (214) is fixedly connected to a cross support frame (211); the right side extension of the slide rod (212) is fixedly connected to a limiting plate (215); the inner wall of the L-shaped rod (101) is fixedly connected to an adapting ring (216); the circular slider (213) is adapted to the adapting ring (216); The second automatic sealing component (22) comprises a second cross support frame (221) fixedly connected to the inner wall of the connecting pipe (1), a positioning block (222) is fixedly connected to the left side of the first circular sliding block (213), and a positioning groove (223) is provided on the left side of the positioning block (222); The right side of the second cross support frame (221) is fixedly connected to a connecting rod (224), the right side of the connecting rod (224) extends into the L-shaped rod (101), the right side of the connecting rod (224) is fixedly connected to an adapting positioning block (225), and the right side of the adapting positioning block (225) extends into the positioning groove (223).
2. A quick connector for LNG cryogenic loading and unloading arm according to claim 1, characterized in that: The quick-connect mechanism (3) comprises a quick-connect component 1 (31) and a quick-connect component 2 (32), wherein the quick-connect component 1 (31) comprises a support block (311) fixedly connected to the outer wall of the connecting tube (1), a sleeve (312) fixedly connected to the top of the support block (311), a circular slider 2 (313) slidably connected to the inner wall of the sleeve (312), a limit rod (314) fixedly connected to the bottom of the circular slider 2 (313), the bottom of the limit rod (314) slidably extending to the outside of the sleeve (312), the bottom of the limit rod (314) slidably penetrating the support block (311), and the bottom of the limit rod (314) slidably extending to the inside of the connecting tube (1).
3. A quick connector for LNG cryogenic loading and unloading arm according to claim 2, characterized in that: The second quick-connect assembly (32) includes a pull rod (321) fixedly connected to the top of the second circular slider (313), the top of the pull rod (321) slidingly extends to the outside of the sleeve (312), and a second spring (322) is fixedly connected to the outer wall of the pull rod (321), the top of the second spring (322) is fixedly connected to the sleeve (312), the bottom of the second spring (322) is fixedly connected to the second circular slider (313), the top of the pull rod (321) is fixedly connected to a handle (323), and the bottom of the handle (323) is fixedly connected to two gaskets (324).
4. A quick connector for LNG cryogenic loading and unloading arm according to claim 3, characterized in that: The anti-backflow mechanism (4) comprises a cross support frame (401) fixedly connected to the inner wall of the second L-shaped rod (102), an adapting ring (402) fixedly connected to the inner wall of the second L-shaped rod (102), and a circular slider (403) slidably connected to the inner wall of the second adapting ring (402).
5. A quick connector for LNG cryogenic loading and unloading arm according to claim 4, characterized in that: The bottom of the cross support frame three (401) is fixedly connected to a telescopic rod (404), the bottom of the telescopic rod (404) is fixedly connected to a circular slider three (403), a spring three (405) is sleeved on the outer wall of the telescopic rod (404), the top of the spring three (405) is fixedly connected to the cross support frame three (401), and the bottom of the spring three (405) is fixedly connected to the circular slider three (403).