A kind of LNG tank car unloading is leaked real-time detection mechanism

Abstract

The utility model provides a kind of LNG tank car unloading with leakage real-time detection mechanism, including connecting valve and the leak detection assembly being connected with the side end portion of connecting valve, the leak detection assembly includes protective tube, and the both ends of protective tube are respectively provided with connecting cover and connecting disc, the inside of protective tube has material conveying pipe, one side end portion of material conveying pipe is formed sealed connection with connecting valve, and the other side end portion is formed sealed connection with connecting disc in protective tube, the connecting cover is sleeved in the outside of connecting valve and material conveying pipe connecting end, and is formed sealed connection with the outer wall of connecting valve.The utility model effectively prevents the problem that natural gas temperature is low and causes material conveying pipe breakage, leakage phenomenon is not easy to be found after material conveying pipe breakage, thereby causing security risk, and whether gas can be leaked is detected in real time, improve the safety of LNG tank car unloading.

Description

Technical Field

[0001] This utility model relates to the field of testing mechanism technology, and in particular to a real-time leak detection mechanism for unloading LNG tank trucks. Background Technology

[0002] LNG tank trucks (liquefied natural gas tank trucks) are special equipment specifically designed for transporting liquefied natural gas (LNG). Their core function is to store and transport cryogenic liquefied natural gas in cryogenic insulated tanks, playing a crucial role in the energy supply chain.

[0003] During the unloading process of LNG tank trucks, liquefied natural gas is transferred through a conveying pipe. However, because liquefied natural gas has a relatively low temperature, the conveying pipe is prone to damage and leakage when used in a low-temperature environment for a long time. The leakage of the conveying pipe is not easy to detect, which can pose a safety hazard to the unloading of LNG tank trucks. Utility Model Content

[0004] To address the technical problem that leaks in the feed pipes are difficult to detect in existing technologies, thus posing a safety hazard to LNG tanker unloading, this utility model provides a real-time leak detection mechanism for LNG tanker unloading.

[0005] The present invention provides a real-time leak detection mechanism for LNG tanker unloading, which adopts the following technical solution:

[0006] A real-time leak detection mechanism for unloading LNG tank trucks includes a connecting valve and a leak detection assembly connected to one end of the connecting valve. The leak detection assembly includes a protective tube with a connecting cover and a connecting disc at each end. The protective tube has a feed pipe inside. One end of the feed pipe forms a sealed connection with the connecting valve, and the other end forms a sealed connection with the connecting disc in the protective tube. The connecting cover is fitted over the outside of the connection between the connecting valve and the feed pipe and forms a sealed connection with the outer wall of the connecting valve.

[0007] By adopting the above technical solution, the leak detection component is placed outside the conveying pipe, enabling real-time leak detection of the conveying pipe. Furthermore, this structure is unaffected by ambient temperature during use, further improving the accuracy of leak detection during LNG tanker unloading and enhancing the safety of LNG tanker unloading.

[0008] Furthermore, a laser gas detector is installed on the outer wall of the connecting valve.

[0009] By adopting the above technical solution, a laser gas detector is used to detect gas leaks at the connection point between the connecting valve and the LNG tanker outlet.

[0010] Furthermore, a detection chamber is formed between the feed pipe and the protective pipe through the protective pipe, the connecting cover and the connecting plate, and an electronic pressure gauge is installed on the outer wall of the protective pipe to detect the gas pressure inside the detection chamber.

[0011] By adopting the above technical solution, when air leakage occurs in the feed pipe, the pressure inside the detection chamber can be increased, and the pressure inside the detection chamber can be displayed by an electronic pressure gauge. Users can judge whether there is a gas leak by observing the value displayed by the electronic pressure gauge.

[0012] Furthermore, there are two electronic pressure gauges, one installed on the outer wall of the connecting cover and the other on the outer wall of the protective tube.

[0013] By adopting the above technical solution, the air pressure at the connection end between the connecting valve and the conveying pipe and the air pressure in the detection chamber between the conveying pipe and the protective pipe can be detected separately, which increases the accuracy of gas leak detection of this testing agency.

[0014] Furthermore, a mechanical detection component is installed outside the leak detection component to mechanically detect the pressure inside the detection chamber.

[0015] By adopting the above technical solution, the pressure inside the detection chamber can be detected by the mechanical detection component, and because the mechanical detection component is mechanical, it is not affected by temperature.

[0016] Furthermore, the mechanical detection component includes a pressure measuring structure, which is connected to the detection chamber via a connecting pipe.

[0017] By adopting the above technical solution, the gas in the detection chamber can enter the pressure measuring structure, thereby enabling the mechanical detection component to detect the pressure in the detection chamber.

[0018] Furthermore, the pressure measuring structure includes a base and a rubber block fixedly disposed at the bottom of the base. A cover is disposed between the rubber block and the side wall of the base. Under the action of the elasticity and friction of the rubber block, the cover is fixedly disposed in the base. A sealed space is formed between the cover and the rubber block. The pressure inside the sealed space is the same as the external environmental pressure. The end of the connecting pipe passes through the bottom of the base and the rubber block and is connected to the sealed space.

[0019] By adopting the above technical solution: when the gas pressure in the detection chamber increases, the gas flows into the sealed space, increasing the gas pressure in the sealed space, and pushing the cover upward under the action of gas pressure.

[0020] Furthermore, a display panel is fixedly connected to the side of the base, the display panel has a scale window, and a pointer is provided extending outward from the side of the cover, the pointer being movable and adjustable within the scale window.

[0021] By adopting the above technical solution, the cover can drive the pointer to move upward inside the scale window. The operator can judge whether there is a leak by observing the position of the pointer in the scale window. This structure is not affected by the ambient temperature during use, which further improves the accuracy of LNG tanker unloading leak detection.

[0022] In summary, the beneficial effects of this utility model are as follows:

[0023] 1. This utility model, by setting up a leak detection component, can detect gas leaks at the connection end between the delivery pipe and the connecting valve and the delivery pipe itself during the unloading process through the detection chamber and electronic pressure gauge in the leak detection component. This structure effectively prevents the problem that the gas leak caused by the low temperature of natural gas is not easily detected, thus posing a safety hazard to the unloading of LNG tank trucks.

[0024] 2. This utility model, by setting up a mechanical detection component, is unaffected by ambient temperature during the unloading process. When a leak occurs, increasing the pressure inside the detection chamber, the pressure in the sealed space of the mechanical detection component increases, causing the cover to move upward. As the cover moves upward, it drives the pointer to move upward inside the scale window. The operator can determine whether there is a leak by observing the position of the pointer in the scale window. This structure is unaffected by ambient temperature during use, further improving the accuracy of leak detection during LNG tanker unloading and further enhancing the safety of LNG tanker unloading. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This utility model Figure 1 Enlarged view of part A in the middle;

[0027] Figure 3 This is a cross-sectional view of the present invention;

[0028] Figure 4 This is a cross-sectional view of the mechanical testing component of this utility model.

[0029] In the diagram: 1. Connecting valve; 3. Leak detection assembly; 4. Feed pipe; 5. Mechanical detection assembly; 11. Laser gas detector; 31. Connecting cover; 32. Protective pipe; 33. Detection chamber; 34. Electronic pressure gauge; 35. Connecting plate; 51. Connecting pipe; 52. Pressure measuring structure; 521. Base; 522. Rubber block; 523. Cover; 524. Display panel; 525. Scale window; 526. Pointer; 527. Sealed space. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0031] Example: Figures 1-4 The image shows a real-time leak detection device for unloading LNG tank trucks.

[0032] The first embodiment of this utility model, referred to... Figures 1-3 As shown, a real-time leak detection mechanism for unloading LNG tank trucks is disclosed, including a connecting valve 1 and a leak detection component 3 connected to one end of the connecting valve 1. A laser gas detector 11 is installed on the outer wall of the connecting valve 1. In use, the connecting valve 1 is connected to the outlet of the LNG tank truck, and the laser gas detector 11 detects whether there is a gas leak at the connection point. The leak detection component 3 includes a protective tube 32, with a connecting cover 31 and a connecting plate 35 respectively installed at both ends of the protective tube 32. The protective tube 32 has a feed pipe 4 inside. One end of the feed pipe 4 forms a sealed connection with the connecting valve 1, and the other end forms a sealed connection with the connecting plate 35 in the protective tube 32. The connecting cover 31 is sleeved on the outside of the connection end between the connecting valve 1 and the feed pipe 4, and forms a sealed connection with the outer wall of the connecting valve 1. A detection cavity 33 is formed between the feed pipe 4 and the protective tube 32 through the protective tube 32, the connecting cover 31, and the connecting plate 35. During the unloading process, the temperature of the conveying pipe 4 will drop rapidly due to the liquefied natural gas. When the conveying pipe 4 is damaged due to cracks or other damage caused by long-term use, the natural gas can be collected in the detection chamber 33. An electronic pressure gauge 34 is installed on the outer wall of the protective pipe 32 to detect the gas pressure inside the detection chamber 33. When the electronic pressure gauge 34 shows an increase in pressure, the operator can determine that a gas leak has occurred during the unloading process.

[0033] Among them, as a preferred option, refer to Figure 1 As shown, there are two electronic pressure gauges 34, which are respectively installed on the outer wall of the connecting cover 31 and the outer wall of the protective tube 32. They can detect the air pressure at the connection end between the connecting valve 1 and the conveying pipe 4 and the air pressure in the detection chamber 33 between the conveying pipe 4 and the protective tube 32.

[0034] In use, this utility model connects the connecting valve 1 to the outlet of the LNG tanker and the connecting plate 35 to the device storing liquefied natural gas. During unloading, the laser gas detector 11 detects in real time whether there is any gas leakage at the connection between the connecting valve 1 and the outlet of the LNG tanker. Furthermore, the detection chamber 33 outside the conveying pipe 4 and the electronic pressure gauge 34 can detect gas leakage at the connection end between the conveying pipe 4 and the connecting valve 1, as well as the conveying pipe 4 itself. This structure effectively prevents the problem of gas leakage caused by the low temperature of natural gas from being easily detected due to the low temperature of the conveying pipe 4, thus avoiding potential safety hazards.

[0035] Reference Figure 1 and Figure 4 As shown, this utility model discloses a second embodiment, in which a mechanical detection component 5 is provided outside the leak detection component 3 to mechanically detect the internal pressure of the detection chamber 33. The mechanical detection component 5 includes a pressure measuring structure 52, which is connected to the detection chamber 33 through a connecting pipe 51. The pressure measuring structure 52 includes a base 521 and a rubber block 522 fixedly disposed at the bottom of the base 521. A cover 523 is disposed between the rubber block 522 and the side wall of the base 521. Under the action of the elasticity and friction of the rubber block 522, the cover 523 is fixedly disposed in the base 521, and a sealed space 527 is formed between the cover 523 and the rubber block 522. The internal pressure of the sealed space 527 is the same as the external environmental pressure. The end of the connecting pipe 51 passes through the bottom of the base 521 and the rubber block 522 and is connected to the sealed space 527. When air leakage occurs, increasing the internal pressure of the detection chamber 33, the gas inside the detection chamber 33 enters the sealed space 527 through the connecting pipe 51, further increasing the internal pressure of the sealed space 527. Under the pressure of the gas inside the sealed space 527, the cover 523 moves upward. A display panel 524 is fixedly connected to the side of the base 521. The display panel 524 has a scale window 525. A pointer 526 extends outward from the side of the cover 523. The pointer 526 can be raised and lowered within the scale window 525. When the cover 523 moves upward, it can drive the pointer 526 to move upward within the scale window 525.

[0036] During unloading, the rapid drop in ambient temperature caused by liquefied natural gas can easily lead to a decrease in the accuracy of the electronic pressure gauge 34 or damage. In this case, the presence of a leak can be determined by observing the mechanical detection component 5. When a leak occurs, increasing the pressure inside the detection chamber 33, the gas inside the chamber enters the sealed space 527 through the connecting pipe 51, further increasing the pressure within the sealed space 527. Under the pressure of the gas inside the sealed space 527, the cover 523 moves upward. This upward movement of the cover 523 causes the pointer 526 to move upward within the scale window 525, pointing to different positions within the scale window 525. Operators can determine if a leak is present by observing the position of the pointer 526 within the scale window 525. This structure is unaffected by ambient temperature during use, further improving the accuracy of leak detection during LNG tanker unloading and enhancing the safety of LNG tanker unloading.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A real-time leak detection mechanism for unloading LNG tank trucks, comprising a connecting valve (1) and a leak detection assembly (3) connected to one end of the connecting valve (1), characterized in that, The leak detection component (3) includes a protective tube (32), with a connecting cover (31) and a connecting plate (35) respectively located at both ends of the protective tube (32). The protective tube (32) has a conveying pipe (4) inside. One end of the conveying pipe (4) forms a sealed connection with the connecting valve (1), and the other end forms a sealed connection with the connecting plate (35) in the protective tube (32). The connecting cover (31) is sleeved on the outside of the connection end between the connecting valve (1) and the conveying pipe (4), and forms a sealed connection with the outer wall of the connecting valve (1).

2. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 1, characterized in that, A laser gas detector (11) is installed on the outer wall of the connecting valve (1).

3. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 1, characterized in that, A detection chamber (33) is formed between the feed pipe (4) and the protective pipe (32) through the protective pipe (32), the connecting cover (31) and the connecting plate (35), and an electronic pressure gauge (34) for detecting the gas pressure inside the detection chamber (33) is provided on the outer wall of the protective pipe (32).

4. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 3, characterized in that, There are two electronic pressure gauges (34), which are respectively installed on the outer wall of the connecting cover (31) and the outer wall of the protective tube (32).

5. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 4, characterized in that, A mechanical detection component (5) is provided outside the leak detection component (3) to mechanically detect the internal pressure of the detection chamber (33).

6. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 5, characterized in that, The mechanical detection component (5) includes a pressure measuring structure (52), which is connected to the detection chamber (33) via a connecting pipe (51).

7. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 6, characterized in that, The pressure measuring structure (52) includes a base (521) and a rubber block (522) fixedly disposed at the bottom of the base (521). A cover (523) is disposed between the rubber block (522) and the side wall of the base (521). Under the action of the elasticity and friction of the rubber block (522), the cover (523) is fixedly disposed in the base (521). A sealed space (527) is formed between the cover (523) and the rubber block (522). The pressure inside the sealed space (527) is the same as the external environmental pressure. The end of the connecting pipe (51) passes through the bottom of the base (521) and the rubber block (522) and is connected to the sealed space (527).

8. The real-time leakage detection mechanism for unloading LNG tank trucks according to claim 7, characterized in that, A display panel (524) is fixedly connected to the side of the base (521). The display panel (524) has a scale window (525). A pointer (526) is provided extending outward from the side of the cover (523). The pointer (526) can be raised and lowered inside the scale window (525).

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