Pressure relief device for LNG (Liquefied Natural Gas) transportation
By designing a combination of main valve body, inlet pipe, outlet pipe and storage tank, the problems of low sealing and depressurization efficiency of traditional LNG transmission devices are solved, achieving efficient depressurization and gas reuse, reducing resource waste and environmental pollution.
Patent Information
- Application Number
- CN202520328854.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Traditional LNG gas transmission depressurization devices have poor sealing performance and low depressurization efficiency, making it impossible to effectively recover and reuse depressurized gas, resulting in resource waste and environmental pollution.
A pressure relief device was designed, comprising a main valve body, an inlet pipe, an outlet pipe, a venting assembly, and a gas storage tank. The device achieves pressure relief and gas collection through the cooperation of a threaded rod, an adjusting plate, a piston, and a return spring. The gas is sealed and reused by the rotation of a ball and a connecting rod.
This achieves more efficient depressurization and gas collection, reduces natural gas waste, and improves system stability and resource utilization.
Smart Images
Figure CN223622707U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pressure relief device technology, and more specifically, to a pressure relief device for LNG liquefied natural gas transmission. Background Technology
[0002] With the continuous growth of global energy demand, liquefied natural gas (LNG), as a clean and efficient energy source, is increasingly widely transported and used. However, during the LNG transportation process, due to the special properties of LNG, such as its rapid vaporization and dramatic volume expansion (approximately 600 times) at normal temperature and pressure, the safety and stability of the transportation system are greatly challenged. Especially during the storage, transportation, and delivery of LNG, failure to effectively manage pressure changes can easily lead to overpressure, resulting in leaks, explosions, and other safety accidents. This not only causes huge economic losses but also serious environmental pollution. Therefore, a pressure relief device for LNG transportation is needed to alleviate pressure.
[0003] Traditional LNG gas transmission depressurization devices often fall short in terms of energy conservation and environmental protection, mainly in the following aspects: First, poor sealing performance, which easily leads to natural gas leakage, resulting in resource waste and environmental pollution; second, low depressurization efficiency, which cannot release overpressure gas in a timely and effective manner, increasing the instability of the system; and third, unsatisfactory collection effect, which cannot effectively recover and reuse the natural gas released during the depressurization process, further exacerbating resource waste. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pressure relief device for LNG liquefied natural gas transmission to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure relief device for LNG liquefied natural gas transmission, comprising a main valve body, an inlet pipe fixedly connected to one side of the main valve body, an outlet pipe fixedly connected to the other side of the main valve body, a threaded hole opened at the top of the main valve body, a first sealing ring provided inside the threaded hole, and a gas relief component provided inside the first sealing ring.
[0006] As a further description of the above technical solution:
[0007] The venting assembly includes a threaded rod inside the first sealing ring, the threaded rod being threadedly connected to a threaded hole, an adjusting plate being fixedly connected to one end of the threaded rod, and a baffle plate being fixedly connected to the other end of the threaded rod.
[0008] As a further description of the above technical solution:
[0009] A vent pipe is fixedly connected to the bottom of the main valve body, and a piston is slidably connected inside the vent pipe. A return spring is fixedly connected to the bottom of the piston.
[0010] As a further description of the above technical solution:
[0011] A gas supply pipe is fixedly connected to one side of the vent pipe, and a threaded groove is opened at one end of the gas supply pipe. A gas storage component is threadedly connected to the outside of the threaded groove.
[0012] As a further description of the above technical solution:
[0013] The gas storage assembly includes a connecting valve body that is threadedly connected to the gas transmission pipe, a second sealing ring is provided between the connecting valve body and the threaded groove, and a ball is provided inside the connecting valve body.
[0014] As a further description of the above technical solution:
[0015] The surface of the sphere has a through hole, and a connecting rod is fixedly connected to one side of the sphere.
[0016] As a further description of the above technical solution:
[0017] One end of the connecting rod extends to the outside of the connecting valve body and is fixedly connected to a handle, and a gas storage tank is fixedly connected to the bottom of the connecting valve body.
[0018] The technical effects and advantages of this utility model are as follows:
[0019] 1. By setting up a connecting valve body and a ball, after the pressure is released, the return spring causes the piston to return to its original position and block the vent pipe. At the same time, turning the handle causes the connecting rod to rotate the ball, which moves the through hole and seals the natural gas in the gas storage tank. Turning the connecting valve body separates the gas storage tank from the gas pipeline, allowing the natural gas in the gas storage tank to continue to be used, thus reducing the waste of natural gas.
[0020] 2. By setting up a threaded rod, adjusting plate, piston, and return spring, the gas inlet pipe and gas delivery pipe are connected to the LNG liquefied natural gas storage device during use. When pressure relief is required, the internal pressure can be used to move the piston downward, opening the vent pipe to release the pressure. Alternatively, rotating the adjusting plate can cause the threaded rod to move the baffle downward, pushing the piston downward to open the vent pipe. Natural gas then enters the gas storage tank from the pressure relief pipe through the gas delivery pipe and connecting valve body for collection, achieving a better collection effect. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0022] Figure 2 This is a schematic diagram of the overall internal structure of this utility model.
[0023] Figure 3 This utility model Figure 2 Enlarged view of section A in the middle.
[0024] Figure 4 This utility model Figure 2 Enlarged view of section B.
[0025] The attached diagram is labeled as follows: 1. Main valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Threaded hole; 5. First sealing ring; 6. Threaded rod; 7. Adjusting plate; 8. Baffle plate; 9. Vent pipe; 10. Piston; 11. Return spring; 12. Gas delivery pipe; 13. Threaded groove; 14. Connecting valve body; 15. Second sealing ring; 16. Ball; 17. Through hole; 18. Connecting rod; 19. Handle; 20. Gas storage tank. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0027] As attached Figure 1-4 The pressure relief device for LNG (liquefied natural gas) transmission shown includes a main valve body 1, an inlet pipe 2 fixedly connected to one side of the main valve body 1, an outlet pipe 3 fixedly connected to the other side of the main valve body 1, a threaded hole 4 opened at the top of the main valve body 1, a first sealing ring 5 provided inside the threaded hole 4, and a venting component provided inside the first sealing ring 5.
[0028] In some embodiments, according to Figure 3 As shown, the venting assembly includes a threaded rod 6 inside the first sealing ring 5, which is threadedly connected to the threaded hole 4. An adjusting plate 7 is fixedly connected to one end of the threaded rod 6, and a baffle 8 is fixedly connected to the other end of the threaded rod 6. A venting pipe 9 is fixedly connected to the bottom of the main valve body 1. A piston 10 is slidably connected inside the venting pipe 9. A return spring 11 is fixedly connected to the bottom of the piston 10. An air supply pipe 12 is fixedly connected to one side of the venting pipe 9. A threaded groove 13 is opened at one end of the air supply pipe 12. An air storage assembly is threadedly connected to the outside of the threaded groove 13, which achieves a better collection effect.
[0029] In some embodiments, according to Figure 2 and 4As shown, the gas storage assembly includes a connecting valve body 14 that is threadedly connected to the gas transmission pipe 12. A second sealing ring 15 is provided between the connecting valve body 14 and the threaded groove 13. A ball 16 is provided inside the connecting valve body 14. A through hole 17 is opened on the surface of the ball 16. A connecting rod 18 is fixedly connected to one side of the ball 16. One end of the connecting rod 18 extends to the outside of the connecting valve body 14 and is fixedly connected to a handle 19. A gas storage tank 20 is fixedly connected to the bottom of the connecting valve body 14, which achieves the effect of reducing the waste of natural gas.
[0030] The working principle of this utility model is as follows: When in use, the inlet pipe 2 and the gas transmission pipe 12 are connected to the LNG liquefied natural gas storage device. When pressure relief is required, the piston 10 can be moved downward by the internal pressure to open the vent pipe 9 and release the pressure. Alternatively, the adjusting plate 7 can be rotated to move the threaded rod 6 to drive the baffle 8 downward, which will push the piston 10 downward to open the vent pipe 9. Natural gas will then enter the gas storage tank 20 from the pressure relief pipe through the gas transmission pipe 12 and the connecting valve body 14 for collection, thus achieving a better collection effect.
[0031] After the pressure is released, the return spring 11 causes the piston 10 to return to its original position and block the vent pipe 9. At the same time, the handle 19 is turned so that the connecting rod 18 drives the ball 16 to rotate, sealing the natural gas in the gas storage tank 20. The connecting valve body 14 is then turned to separate the gas storage tank 20 from the gas transmission pipe 12, allowing the natural gas in the gas storage tank 20 to continue to be used, thus reducing the waste of natural gas.
[0032] 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 pressure relief device for LNG (liquefied natural gas) transmission, comprising a main valve body (1), characterized in that: An air inlet pipe (2) is fixedly connected to one side of the main valve body (1), and an air outlet pipe (3) is fixedly connected to the other side of the main valve body (1). A threaded hole (4) is opened at the top of the main valve body (1), and a first sealing ring (5) is provided inside the threaded hole (4). A venting component is provided inside the first sealing ring (5).
2. The LNG liquefied natural gas transmission pressure relief device according to claim 1, characterized in that: The venting assembly includes a threaded rod (6) inside the first sealing ring (5), the threaded rod (6) being threadedly connected to the threaded hole (4), an adjusting plate (7) being fixedly connected to one end of the threaded rod (6), and a baffle plate (8) being fixedly connected to the other end of the threaded rod (6).
3. The LNG liquefied natural gas transmission pressure relief device according to claim 2, characterized in that: The bottom of the main valve body (1) is fixedly connected to a vent pipe (9), and a piston (10) is slidably connected inside the vent pipe (9). A return spring (11) is fixedly connected to the bottom of the piston (10).
4. The LNG liquefied natural gas transmission pressure relief device according to claim 3, characterized in that: A gas supply pipe (12) is fixedly connected to one side of the vent pipe (9). A threaded groove (13) is provided at one end of the gas supply pipe (12). A gas storage component is threadedly connected to the outside of the threaded groove (13).
5. The LNG liquefied natural gas transmission pressure relief device according to claim 4, characterized in that: The gas storage assembly includes a connecting valve body (14) that is threadedly connected to the gas transmission pipe (12), a second sealing ring (15) is provided between the connecting valve body (14) and the threaded groove (13), and a ball (16) is provided inside the connecting valve body (14).
6. The LNG liquefied natural gas transmission pressure relief device according to claim 5, characterized in that: The surface of the sphere (16) is provided with a through hole (17), and a connecting rod (18) is fixedly connected to one side of the sphere (16).
7. The LNG liquefied natural gas transmission pressure relief device according to claim 6, characterized in that: One end of the connecting rod (18) extends to the outside of the connecting valve body (14) and is fixedly connected to a handle (19). A gas storage tank (20) is fixedly connected to the bottom of the connecting valve body (14).