A crane leak test system for liquid chlorine unloading

Abstract

The present application relates to the field of crane pipe leak testing, and specifically discloses a crane pipe leak testing system for liquid chlorine unloading. The crane pipe includes a fixed pipe and a movable pipe, and a heat insulation structure is arranged on the fixed pipe and the movable pipe; the heat insulation structure is used to insulate the inside of the fixed pipe and the movable pipe; a temperature detection component for obtaining the temperature of the heat insulation structure is arranged at the heat insulation structure; a socket matching the filling port of the tank truck is formed on the fixed pipe; the movable pipe is inserted into the socket so that the fixed pipe and the movable pipe form a closed loop; a gas thermal imaging component is arranged on the fixed pipe, and the gas thermal imaging component forms a gas detection area, and the gas detection area covers the movable pipe. The present application has the effect of ensuring that the liquid chlorine will not be vaporized when unloading the truck, and better protecting the crane pipe, while using the temperature detection component and the gas thermal imaging component to detect the temperature outside the heat insulation structure, and when the crane pipe leaks, it will cause the temperature outside the heat insulation structure to change significantly, thereby using liquid chlorine to directly perform leak testing.

Description

Technical Field

[0001] The present application relates to the field of crane pipe leak testing, and in particular to a crane pipe leak testing system for liquid chlorine unloading. Background Art

[0002] At present, the main method for detecting leakage of the crane pipe of the unloading truck is to connect the crane pipe to the filling port of the tank truck and then perform a leak test. After the leak test is qualified, the crane pipe is connected to the filling port of the tank truck and then the unloading is carried out;

[0003] When testing the crane for leaks, the pressure change in the crane is often used to determine whether the crane is leaking. In other schemes, there are also methods of mainly detecting leaks manually. When the liquid unloaded is liquid chlorine, nitrogen is mainly used to replace liquid chlorine.

[0004] However, the properties of nitrogen are completely different from those of liquid chlorine. Liquid chlorine will vaporize as the temperature changes. If the outside temperature is high and part of the liquid chlorine in the crane pipe vaporizes, the pressure in the crane pipe will change significantly, making it difficult to accurately detect whether the crane pipe will leak when unloading liquid chlorine. Summary of the invention

[0005] In order to improve the problem that it is difficult to accurately detect whether a crane pipe will leak when unloading liquid chlorine, the present application provides a crane pipe leak detection system for unloading liquid chlorine.

[0006] The present application provides a liquid chlorine unloading crane pipe leak testing system that adopts the following technical solution:

[0007] A crane pipe leak test system for unloading liquid chlorine, the crane pipe comprising a fixed pipe and a movable pipe at least for connecting to a tanker filling port; the outer walls of the fixed pipe and the movable pipe are both covered with a heat insulation structure; the heat insulation structure is used to insulate the inside of the fixed pipe and the movable pipe; a temperature detection member for obtaining the temperature of the heat insulation structure is arranged at the heat insulation structure; a socket matching the tanker filling port is formed on the fixed pipe; the movable pipe is inserted into the socket so that the fixed pipe and the movable pipe form a closed loop; a gas thermal imaging member is arranged on the fixed pipe, the gas thermal imaging member forms a gas detection area, and the gas detection area covers the movable pipe.

[0008] By adopting the above technical scheme, the heat insulation structure is mainly used to insulate the movable pipe and the fixed pipe, so as to avoid the liquid chlorine from exchanging heat with the external environment during transportation, causing part of the liquid chlorine to be vaporized into gas, thereby better ensuring the transportation of liquid chlorine in the movable pipe and the fixed pipe, avoiding the occurrence of gas causing a significant increase in the pressure in the movable pipe or the fixed pipe, thereby avoiding the situation where the movable joint of the movable pipe is damaged by pressure or easy to leak, thereby improving the stability of the crane pipe when unloading the liquid chlorine. In addition, the temperature detection part is used to detect the temperature of the area near the heat insulation structure. If the crane pipe leaks, the liquid chlorine in the crane pipe will leak outward. The temperature of the liquid chlorine is very low. After leaking, it is easy to become a gas to absorb heat, causing the surrounding environment to drop significantly. Therefore, by using the temperature detection method, it is possible to timely determine whether the crane pipe is leaking. If the heat insulation structure is not set, the crane pipe temperature will be low, and the ambient temperature around the crane pipe will be low. When the liquid chlorine leaks, the temperature around the crane pipe will not change much after the liquid chlorine is vaporized due to the low temperature, which will make it difficult for the temperature detection part to accurately detect the leakage of liquid chlorine.

[0009] In addition, by using the gas thermal imaging element to detect the temperature change of the environment around the crane, the temperature change caused by the liquid chlorine leakage can be further detected, further improving the accuracy of the liquid chlorine leakage detection. Since the temperature detection element can only detect the temperature change, the gas thermal imaging element can detect the direction and range of the temperature change, thereby improving the accuracy of the liquid chlorine leakage.

[0010] Optionally, the thermal insulation structure is used to form an insulation area, which at least wraps the movable joint of the movable tube; the insulation area is filled with protective gas; the pressure in the insulation area is lower than the pressure in the movable tube and the fixed tube; and an air pressure monitoring device is arranged in the insulation area.

[0011] By adopting the above technical solution, the protective gas is in direct contact with the crane pipe, or more precisely, the protective gas is in direct contact with the active part of the crane pipe in the heat-insulating area. Then, when liquid chlorine leaks, the liquid chlorine leaks into the protective gas to avoid chemical reactions. At the same time, the liquid chlorine enters the heat-insulating area, which can also prevent the liquid chlorine from directly leaking into the outside air, thereby improving the safety of liquid chlorine unloading. At the same time, it also increases the safety of leak testing during the liquid chlorine leak testing process. In addition, by filling the heat-insulating area with protective gas, the heat-insulating effect can be increased compared to the traditional cotton pad wrapping insulation method.

[0012] Optionally, a plurality of the thermal insulation structures are provided, each of which wraps a movable joint of the movable tube; a connecting piece is provided on the thermal insulation structure, and the connecting piece is used to form a connecting cavity connecting the plurality of the thermal insulation areas; a control piece for controlling the opening and closing state of the connecting cavity is provided in the connecting cavity.

[0013] By adopting the above-mentioned technical solution, when the air pressure in the insulation area of ​​one of the insulation structures increases significantly, the control component can be opened to connect all or part of the insulation areas, and then the pressure in one of the insulation areas where the air pressure increases significantly can be relieved to better protect the insulation structure.

[0014] Optionally, the thermal insulation structure includes an elastic thermal insulation film; the elastic thermal insulation film is provided with at least two layers, and a supporting structure is provided between the two layers of the elastic thermal insulation film to form a vacuum area between the two layers of the elastic thermal insulation film; the vacuum area is located outside the thermal insulation area, and the vacuum area wraps the thermal insulation area.

[0015] By adopting the above technical solution, the elastic thermal insulation film itself is elastic and can be deformed when the movable tube moves to adapt to the movement of the movable tube, so as to better protect the movable joint of the movable tube. In addition, the protective gas in the elastic thermal insulation film is used to increase the thermal insulation effect, and the vacuum area between the two layers of elastic thermal insulation film is used to further improve the thermal insulation effect. Therefore, the use of the elastic thermal insulation film not only ensures the normal movement of the movable tube, but also ensures a better thermal insulation effect, which is more conducive to the detection of liquid leakage.

[0016] Optionally, the thermal insulation structure further comprises: a tightening component, which is at least used to tighten and fix the elastic thermal insulation membrane on the movable tube.

[0017] Optionally, the heat insulation area and the vacuum area are both elastic spaces with variable sizes.

[0018] Optionally, the support structure includes: a plurality of elastic tubes, a plurality of connecting rods and a plurality of support wires for bundling the elastic tubes; a plurality of the elastic tubes are plugged together to form a plurality of groups of the elastic tubes; a plurality of groups of the elastic tubes are distributed in a rectangular array to form a rectangular area; the connecting rods are used to fix the plurality of groups of the elastic tubes; the support wires are fixed on the connecting rods, and the support wires extend along the plugging direction of the elastic tubes and are distributed around the rectangular area; the support wires are elastic; when the elastic thermal insulation membrane expands and contracts, the plurality of groups of the elastic tubes and the plurality of support wires are stretched or shortened; the rectangular area matches the vacuum area.

[0019] By adopting the above technical solution, since the elastic thermal insulation film is elastic, the support between the two layers of elastic thermal insulation film needs to be achieved through an elastic frame, which also prevents the two layers of elastic thermal insulation film from being stuck together due to the effect of atmospheric pressure, making it difficult to form a vacuum area. By setting up multiple elastic tubes, the elastic tubes can bend when subjected to force, and the plug-in connection between the elastic tubes can also make the elastic tubes stretch and shorten. Then, when the movable tube moves, the multiple elastic tubes stretch or shorten to ensure that the elastic thermal insulation film wraps the movable joint of the movable tube and also ensures the normal movement of the movable tube. The multiple support lines at the elastic tube can play a role in fully supporting the elastic thermal insulation film, and the support lines are also elastic, thereby achieving insulation while ensuring the normal movement of the movable tube.

[0020] Optionally, the support structure further includes a staggered line, which is fixed on the plurality of elastic tubes in a direction perpendicular to the support line, the staggered line is located inside the rectangular area, and the staggered line abuts against the support line.

[0021] By adopting the above technical solution, the staggered lines are used to support the support lines, thereby avoiding bending of the support lines due to their own elasticity, thereby avoiding the elastic insulation film exerting force on the support lines, bending of the support lines, and then the elastic insulation film parts being fitted together, thereby better ensuring the vacuum area formed between the two layers of elastic insulation films, thereby greatly improving the insulation effect and being more conducive to leakage detection.

[0022] Optionally, the temperature detection member is used to form an annular temperature monitoring area outside the thermal insulation structure; and the thermal insulation structure is located within the annular temperature monitoring area.

[0023] By adopting the above technical solution, when liquid chlorine leaks, the annular temperature monitoring area will be in contact with the annular monitoring area no matter where the liquid chlorine leaks, so that the temperature change can be monitored in time, the leakage of liquid chlorine can be discovered in time, and the detection speed and effect of liquid chlorine leak test will be faster and better.

[0024] Optionally, the temperature detection component includes a temperature sensor and a temperature transfer structure; the temperature transfer structure is used to form the annular temperature monitoring area; and the temperature sensor is used to obtain the temperature of the annular temperature monitoring area.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The heat insulation structure is used to ensure that the liquid chlorine will not be vaporized when unloading, so as to better protect the crane pipe. At the same time, the temperature detection component and the gas thermal imaging component are used to detect the temperature outside the heat insulation structure. When the crane pipe leaks, the temperature outside the heat insulation structure will change significantly, so that liquid chlorine can be used directly for leak testing and the leakage of the crane pipe can be accurately detected;

[0027] 2. Using the support structure and elastic insulation film, a heat insulation area and a vacuum area are formed on the outside of the crane pipe to better insulate the crane pipe, improve the stability of the crane pipe for liquid chlorine unloading, and improve the accuracy of detecting crane pipe leakage;

[0028] 3. By using a support structure that uses an elastic ball or a design that includes an elastic tube and a support wire, the thermal insulation structure can change its shape as the movable joint of the movable tube moves, thereby always maintaining the protection of the movable tube by the thermal insulation structure and always maintaining the detection of crane tube leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0030] Figure 2 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the movable tube and some surrounding parts;

[0031] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the connecting member and the thermal insulation structure;

[0032] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the heat insulation structure and the temperature detection member;

[0033] Figure 5 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the movable tube and the fixed tube;

[0034] Figure 6 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the movable tube and the movable joint;

[0035] Figure 7 It is a schematic structural diagram of a part of the embodiment, mainly showing a schematic diagram of a heat insulation structure;

[0036] Figure 8 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure when the supporting structure adopts an elastic ball;

[0037] Fig. 9 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure when the supporting structure includes an elastic tube;

[0038] Fig.10 It is a structural schematic diagram of a part of the embodiment, mainly showing the Fig. 9 structure;

[0039] Fig.11 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the elastic tube, the support wire and the staggered wire;

[0040] Fig.12 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the elastic tube, the connecting rod and the staggered wire;

[0041] Fig.13 It is a structural schematic diagram of a part of the embodiment, mainly showing a state structure of the elastic tube;

[0042] Fig.14 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the elastic tube in another state;

[0043] Fig.15 It is a structural schematic diagram of a part of the embodiment, mainly showing the cross-sectional structure of the thermal insulation structure;

[0044] Fig.16 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the first card plate, the second card plate and the elastic membrane;

[0045] Fig.17 It is a structural schematic diagram of a part of the embodiment, mainly showing the position structure of the vacuum area and the insulation area.

[0046] Reference numerals:

[0047] 1. Fixed tube; 11. Socket; 2. Movable tube; 21. Movable joint; 3. Insulation structure; 31. Insulation area; 32. Elastic insulation film; 33. Support structure; 331. Elastic ball; 332. Elastic tube; 333. Connecting rod; 334. Support line; 335. Interlaced line; 34. Tightening component; 35. Vacuum area; 36. Connecting piece; 37. Control piece; 38. First clamping plate; 39. Second clamping plate; 4. Temperature detection piece; 41. Temperature monitoring area; 42. Sealing sleeve; 421. Annular sleeve; 422. Rod-shaped sleeve. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1 - 17 further describes this application in detail. Example 1

[0049] A crane pipe leak test system for unloading liquid chlorine, the crane pipe comprises a fixed pipe 1 and a movable pipe 2 at least used for connecting to the filling port of the tanker. The movable pipe 2 is connected to the fixed pipe 1, and the movable pipe 2 sucks out the liquid chlorine in the tanker, and then transports it away through the fixed pipe 1 to realize unloading of the tanker.

[0050] The outer walls of the fixed tube 1 and the movable tube 2 are both covered with a heat insulation structure 3. The heat insulation structure 3 is used to insulate the inside of the fixed tube 1 and the movable tube 2. In this embodiment, the heat insulation structure 3 uses a heat insulation cotton pad, and the heat insulation structure 3 wraps the fixed tube 1 and the movable tube 2 to achieve the effect of heat insulation for the fixed tube 1 and the movable tube 2. It is prevented that the liquid chlorine exchanges heat with the external environment during transportation, causing part of the liquid chlorine to be vaporized into gas, thereby better ensuring the transportation of liquid chlorine in the movable tube 2 and the fixed tube 1, avoiding the occurrence of gas that causes a significant increase in pressure in the movable tube 2 or the fixed tube 1, thereby avoiding the situation where the movable joint of the movable tube 2 is damaged by pressure or easy to leak, thereby improving the stability of the crane when unloading liquid chlorine.

[0051] A temperature detection member 4 for obtaining the temperature of the insulation structure 3 is provided at the insulation structure 3. In this embodiment, the temperature detection member 4 preferably adopts a temperature sensor. The temperature detection member 4 is used to detect the temperature of the area near the insulation structure 3. If a crane pipe leaks, the liquid chlorine in the crane pipe will leak out. The temperature of the liquid chlorine is very low. After leaking, it is easy to turn into gas to absorb heat, causing the surrounding environment to drop significantly. Therefore, by using the temperature detection method, it is possible to timely determine whether the crane pipe is leaking.

[0052] The fixed pipe 1 is formed with a socket 11 that matches the filling port of the tank truck; the movable pipe 2 is inserted into the socket 11, so that the fixed pipe 1 and the movable pipe 2 form a closed loop. The movable pipe 2 and the fixed pipe 1 form a closed loop, so that the liquid chlorine can flow or remain stationary in the movable pipe 2 and the fixed pipe 1, so as to actually simulate the situation after the movable pipe 2 is connected to the tank port of the tank truck, and the leak test process is more accurate. Specifically, a valve body is provided on the fixed pipe 1, and the valve body is used to block the fixed pipe 1, so that the fixed pipe 1 cannot transport the liquid chlorine away, and only the liquid chlorine can circulate in the movable pipe 2 and the fixed pipe 1, so that the liquid chlorine passes through the movable pipe 2 and the fixed pipe 1 when unloading the truck, which more realistically simulates the situation when unloading the truck, and can more accurately detect the leak of liquid chlorine.

[0053] A gas thermal imaging element is provided on the fixed tube 1, and the gas thermal imaging element forms a gas detection area, and the gas detection area covers the movable tube 2. In the present embodiment, the gas thermal imaging element adopts a gas thermal imager. By using the gas thermal imaging element to detect the temperature change of the environment around the crane tube, the temperature change caused by the leakage of liquid chlorine can be further detected, and the accuracy of the liquid chlorine leakage detection can be further improved. Since the temperature detection element 4 can only detect the change of temperature, the gas thermal imaging element can detect the direction and range of the temperature change, thereby improving the accuracy of the liquid chlorine leakage. The gas thermal imaging element can be set on the fixed tube, or set at another fixed position, mainly used to make the detection range of the gas thermal imaging element cover the movable range of the movable tube.

[0054] In some solutions, when the movable space of the movable tube 2 is small, the movable tube 2 cannot be inserted into the socket 11. An extension tube can be provided at the socket 11 of the fixed tube 1, and the movable tube 2 is inserted into the extension tube to indirectly form a closed loop. Example 2

[0055] The difference from Example 1 is that:

[0056] The heat-insulating structure 3 is used to form a heat-insulating area 31, and the heat-insulating area 31 at least wraps the movable joint 21 of the movable tube 2; the heat-insulating area 31 is filled with a protective gas; the pressure in the heat-insulating area 31 is lower than the pressure in the movable tube 2 and the fixed tube 1; and an air pressure monitoring device is arranged in the heat-insulating area 31. Among them, the heat-insulating structure 3 in this embodiment is a shell, and a cavity is formed in the heat-insulating structure 3, and the cavity is the heat-insulating area 31. The protective gas filled in the heat-insulating area 31 is preferably nitrogen. The protective gas is in direct contact with the crane pipe, so when the liquid chlorine leaks, the liquid chlorine leaks into the protective gas to avoid chemical reactions. At the same time, the liquid chlorine enters the heat-insulating area 31, which can also prevent the liquid chlorine from directly leaking into the external air, thereby improving the safety of the liquid chlorine when unloading. Example 3

[0057] The difference from Example 2 is that:

[0058] The thermal insulation structure 3 includes an elastic thermal insulation film 32. The elastic thermal insulation film 32 is provided with at least two layers, and a support structure 33 is provided between the two layers of the elastic thermal insulation film 32, so that a vacuum area 35 is formed between the two layers of the elastic thermal insulation film 32. The thermal insulation structure 3 also includes: a tightening component 34. The tightening component 34 is at least used to tighten and fix the elastic thermal insulation film 32 on the movable tube 2. The elastic thermal insulation film 32 abuts against the outer wall of the movable tube 2, and the end of the elastic thermal insulation film 32 is fixed to the outer wall of the movable tube 2 through the tightening structure. In this embodiment, the tightening structure adopts a tightening rope, which is tied to the outer wall of the movable tube 2, so as to fix the elastic thermal insulation film 32 to the movable tube 2. In order to further increase the effect of fixing the elastic thermal insulation film 32 to the movable tube 2, an annular groove is provided on the outer wall of the movable tube 2, and the tightening structure embeds the elastic thermal insulation film 32 into the annular groove and tightens it, thereby increasing the effect of fixing the elastic thermal insulation film 32 to its movable tube 2. After the protective gas is injected into the elastic thermal insulation film 32, the gas pressure of the protective gas is greater than the atmospheric pressure, so that the elastic thermal insulation film 32 expands, which can avoid the situation where the elastic thermal insulation film 32 is separated from the movable tube 2 when it expands. The elastic thermal insulation film 32 itself is elastic and can be deformed as the movable tube 2 moves to adapt to the movement of the movable tube 2, so that the movable joint 21 of the movable tube 2 can be better protected. In addition, the protective gas in the elastic thermal insulation film 32 is used to increase the insulation effect, and the vacuum area 35 between the two layers of the elastic thermal insulation film 32 can be used to further improve the insulation effect. To be precise, the insulation area 31 and the vacuum area 35 are both elastic spaces of variable size. The elastic space refers to a space that can adapt to the movement of the movable tube 2 without leakage.

[0059] The vacuum area 35 is located outside the insulation area 31, and the vacuum area 35 wraps the insulation area 31. More specifically, the support structure 33 in this embodiment adopts a combination of multiple elastic balls 331. The elastic ball 331 is a sphere composed of countless circular ring arrays, which can be made of plastic and rubber. The elastic ball 331 is elastic and deforms when compressed. Then the elastic ball 331 is filled in the vacuum area 35, which can support the two layers of elastic insulation film 32, so that the two layers of elastic insulation film 32 cannot fit together, thereby better forming the vacuum area 35. Example 4

[0060] The difference from Example 3 is that:

[0061] The support structure 33 includes: a plurality of elastic tubes 332 , a plurality of connecting rods 333 , and a plurality of support wires 334 for being tied to the elastic tubes 332 .

[0062] A plurality of elastic tubes 332 are plugged together to form a plurality of groups of elastic tubes 332. The plurality of groups of elastic tubes 332 are arranged in a rectangular array to form a rectangular area. The movable tube 2 is located in the rectangular area. In some other schemes, the plurality of groups of elastic tubes 332 are arranged in a circumferential array to form a circular area. The plurality of elastic tubes 332 are plugged together to form a telescopic tube, that is, the plurality of elastic tubes 332 can be pulled mutually, so that each group of elastic tubes 332 can be lengthened and shortened. When the plurality of groups of elastic tubes 332 form a rectangular area, the plurality of groups of elastic tubes 332 form two rectangular areas of different sizes. Each rectangular area is in contact with an elastic heat insulation film 32, so that a vacuum area 35 is formed between the two rectangular areas of different sizes. The connecting rod 333 is used to fix the plurality of groups of elastic tubes 332. To be precise, the connecting rod 333 is used to connect and fix the plurality of groups of elastic tubes 332, thereby obtaining a rectangular body structure. The support wire 334 is fixed on the connecting rod 333, and the support wire 334 extends along the plugging direction of the elastic tube 332 and is distributed around the rectangular area. The support wire 334 is elastic. When the elastic thermal insulation film 32 expands and contracts, the multiple groups of elastic tubes 332 and the multiple support wires 334 are extended or shortened. The support wire 334 is used to contact the elastic thermal insulation film 32. The support wire 334 supports the elastic thermal insulation film 32, thereby preventing the elastic thermal insulation film 32 from being attached together, ensuring the formation of the vacuum area 35. In addition, the support wire 334 can better contact the elastic thermal insulation film 32, increase the contact area, and prevent the elastic thermal insulation film 32 from being damaged when contacting the support structure 33. Compared with the support structure 33 in Example 3, the support structure 33 of this scheme can better ensure the flatness of the elastic insulation membrane 32 by the contact between the elastic insulation membrane 32 and the support line 334. The elastic ball 331 used in Example 3 will cause the elastic insulation membrane 32 to be embedded in the hollow area of ​​the elastic ball 331, resulting in an uneven surface of the elastic insulation membrane 32 and easy damage.

[0063] By utilizing the arrangement of multiple elastic tubes 332, the elastic tubes 332 can bend when subjected to force, and the plug-in connection between the elastic tubes 332 can also allow the elastic tubes 332 to be extended or shortened. When the movable tube 2 moves, the multiple elastic tubes 332 can be extended or shortened to ensure that the elastic insulation film 32 wraps around the movable joint 21 of the movable tube 2 and also ensure the normal movement of the movable tube 2. The multiple support wires 334 at the elastic tubes 332 can fully support the elastic insulation film 32, and the support wires 334 are also elastic, thereby achieving insulation while ensuring the normal movement of the movable tube 2.

[0064] The rectangular area matches the vacuum area 35. To be precise, the new area formed by the two rectangular areas is the vacuum area 35.

[0065] More specifically, since the support wire 334 is elastic and the multiple groups of elastic tubes 332 can be stretched, the support wire 334 is easily bent after being subjected to the pressure of the elastic insulation film 32, which will cause the surface of the elastic insulation film 32 to be not smooth enough. In some cases, it will also cause the elastic insulation film 32 to be partially fitted together, making it difficult to ensure the formation of the vacuum area 35. For this reason, the support structure 33 of this embodiment also includes staggered wires 335, which are fixed on the multiple elastic tubes 332 in a direction perpendicular to the support wires 334. The staggered wires 335 are located inside the rectangular area, and the staggered wires 335 are in contact with the support wires 334. In some schemes, the support wires 334 can also be relatively arranged and fixed on the multiple elastic tubes 332 in a direction different from the length direction of the support wires 334. In this embodiment, the preferred staggered wires 335 use a rigid rope body. To be precise, the staggered lines 335 are fixed on the corresponding elastic tubes 332 of different groups, so when the elastic tubes 332 are expanded or contracted, they will not interfere with the staggered lines 335, wherein the staggered lines 335 are used to support the support lines 334, thereby preventing the support lines 334 from bending due to their own elasticity. Example 5

[0066] The difference from Example 4 is:

[0067] There are multiple insulation structures 3, and each insulation structure 3 wraps a movable joint 21 of a movable tube 2. A connector 36 is provided on the insulation structure 3, and the connector 36 is used to form a connecting cavity connecting multiple insulation areas 31; a control member 37 for controlling the opening and closing state of the connecting cavity is provided in the connecting cavity. Since the movable joint 21 of the movable tube 2 is prone to leakage, and in the leak test of liquid chlorine, the movable joint 21 of the movable tube 2 is often concentratedly tested, so this embodiment also mainly performs leak test on the movable joint 21 of the movable tube 2. To a certain extent, the corresponding detection cost is reduced.

[0068] When the heat insulation structure 3 is mainly covered on the movable joint 21, the movable tube 2 moves, part of the elastic tube 332 will bend greatly, and part of the elastic tube 332 will bend slightly. The staggered line 335 is fixed on the elastic tube 332. When the bending amplitudes of the two elastic tubes 332 connected to the staggered line 335 are different, the staggered line 335 will make the two groups of elastic tubes 332 approach each other or move away from each other, which can ensure the normal bending of the elastic tube 332, thereby ensuring the normal movement of the movable tube 2. Example 6

[0069] The difference from Example 4 is that:

[0070] The tightening structure includes a first clamping plate 38 and a second clamping plate 39. The first clamping plate 38 and the second clamping plate 39 are both used to be fixed to the movable tube 2. The first clamping plate 38 and the second clamping plate 39 are both provided with a plug hole, and the plug hole is used for inserting the end of the elastic tube 332. Each group of elastic tubes 332 is arranged between the first clamping plate 38 and the second clamping plate 39, and the elastic thermal insulation film 32 is fixed to the first clamping plate 38 and the second clamping plate 39. The elastic thermal insulation film 32, the first clamping plate 38 and the second clamping plate 39 jointly form the thermal insulation area 31 and the vacuum area 35.

[0071] In some solutions, the first clamping plate 38 and the second clamping plate 39 are both detachably connected to the movable tube 2. In other solutions, the elastic tube 332 is directly fixed to the first clamping plate 38 and the second clamping plate 39. Example 7

[0072] The difference from Example 1 is:

[0073] The temperature detection member 4 is used to form an annular temperature monitoring area outside the thermal insulation structure 3; the thermal insulation structure 3 is located in the annular temperature monitoring area 41. The temperature detection member 4 includes a temperature sensor and a temperature transfer structure. The temperature transfer structure is used to form an annular temperature monitoring area; the temperature sensor is used to obtain the temperature of the annular temperature monitoring area.

[0074] The temperature transfer structure includes: a sealing sleeve 42, the sealing sleeve 42 forms an annular sleeve 421 and a plurality of rod-shaped sleeves 422, the rod-shaped sleeve 422 is connected and fixed to the annular sleeve 421. The rod-shaped sleeve 422 and the annular sleeve 421 together form an annular area, the rod-shaped sleeve 422 contacts the elastic insulation film 32, the temperature monitoring area is filled with air, and the temperature sensor is located in the temperature monitoring area to detect the temperature of the air. In such a design, when liquid chlorine leaks, the rod-shaped sleeve 422 contacts the leaked liquid chlorine at the first time, and then quickly transfers the temperature to the temperature monitoring area, so that the temperature of the entire temperature monitoring area changes, so that it can be quickly detected by the temperature sensor. If the design of the temperature monitoring area is not used, then when liquid chlorine leaks at a position far away from the temperature sensor, the temperature is transferred to most of the surrounding air, and will not be quickly transferred to the temperature sensor using a small volume of air at the first time, so that it is difficult to detect the temperature change at the first time.

[0075] In order to better ensure the temperature transfer in the temperature monitoring area, the sealing sleeve 42 is made of heat insulating material. The part of the rod-shaped sleeve 422 that contacts the heat insulating structure 3 is made of heat conductive material. This can better guide heat into the temperature monitoring area and prevent the external environment from affecting the temperature in the temperature monitoring area. Example 8

[0076] The difference from Example 3 is that:

[0077] The heat-insulating area 31 is provided with an air pressure detection element, which is mainly used to detect the pressure change in the heat-insulating area 31. When liquid chlorine leaks into the heat-insulating area 31, the pressure in the heat-insulating area 31 increases, so that it is determined whether the liquid chlorine leaks by the pressure change.

[0078] The implementation principle of a crane leak test system for liquid chlorine unloading in the present application is as follows:

[0079] The movable tube 2 is inserted into the socket 11 of the fixed tube 1, and the movable tube 2 and the fixed tube 1 form a closed loop. Then, liquid chlorine is filled in the movable tube 2 and the fixed tube 1, and a leak test is performed by observing whether there is leakage of liquid chlorine.

[0080] The movable joint of the movable tube 2 is provided with a heat-insulating structure 3, which is composed of a heat-insulating area 31 filled with protective gas and a vacuum area 35 outside the heat-insulating area 31. The heat-insulating area 31 and the vacuum area 35 are both used to insulate the movable part of the movable tube 2, so as to prevent the liquid chlorine in the movable tube 2 from being subjected to high temperature and gasifying, resulting in an increase in the gas pressure on the movable tube 2, thereby preventing the tube from bursting.

[0081] When liquid chlorine leaks, the liquid chlorine enters the heat-insulating area 31, and the pressure of the heat-insulating area 31 changes. The air pressure detection element can detect the pressure change, so that the leakage of liquid chlorine can be discovered in time.

[0082] When a leak occurs in the insulation area 31, since the protective gas in the insulation area 31 is in contact with the movable tube 2, the temperature of the protective gas is also relatively low. Therefore, after the leak occurs in the insulation area 31, the protective gas overflows, causing the temperature of the surrounding environment to change. This can be detected by the temperature detection component 4 and the gas thermal imager, and the leak in the insulation area 31 can be discovered in time.

[0083] The purpose of timely discovering the leakage of the heat insulation area 31 is to avoid the situation where the leakage of liquid chlorine caused by the leakage of the heat insulation area 31 is difficult to discover in time.

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid chlorine unloading crane pipe leak testing system, the crane pipe comprises a fixed pipe and a movable pipe at least for connecting to the tanker filling port; characterized in that: The outer walls of the fixed tube and the movable tube are both covered with a heat insulation structure; the heat insulation structure is used to keep the inside of the fixed tube and the movable tube warm; The thermal insulation structure is provided with a temperature detection element for obtaining the temperature of the thermal insulation structure; The fixed pipe is formed with a socket matching the filling port of the tanker; the movable pipe is inserted into the socket so that the fixed pipe and the movable pipe form a closed loop; A gas thermal imaging element is arranged on the fixed tube, the gas thermal imaging element forms a gas detection area, and the gas detection area covers the movable tube; The thermal insulation structure is used to form a thermal insulation area, and the thermal insulation area at least wraps the movable joint of the movable pipe; The heat-insulating area is filled with protective gas; the pressure in the heat-insulating area is lower than the pressure in the movable tube and the fixed tube; and a gas pressure monitoring component is arranged in the heat-insulating area.

2. A liquid chlorine unloading crane leak testing system according to claim 1, characterized in that: The thermal insulation structure is provided in plurality, and each of the thermal insulation structures wraps a movable joint of the movable tube; A connecting piece is arranged on the thermal insulation structure, and the connecting piece is used to form a connecting cavity connecting a plurality of the thermal insulation areas; a control piece for controlling the opening and closing state of the connecting cavity is arranged in the connecting cavity.

3. A liquid chlorine unloading crane leak testing system according to claim 2, characterized in that: The thermal insulation structure comprises an elastic thermal insulation film; the elastic thermal insulation film is provided with at least two layers, and a supporting structure is provided between the two layers of the elastic thermal insulation film, so that a vacuum area is formed between the two layers of the elastic thermal insulation film; The vacuum region is located outside the heat insulation region, and the vacuum region wraps the heat insulation region.

4. A liquid chlorine unloading crane leak testing system according to claim 3, characterized in that: The thermal insulation structure further comprises: a tightening component, which is at least used to tighten and fix the elastic thermal insulation membrane on the movable tube.

5. A liquid chlorine unloading crane pipe leak testing system according to claim 3 or 4, characterized in that: The heat-insulating area and the vacuum area are both elastic spaces with variable sizes.

6. A liquid chlorine unloading crane pipe leak testing system according to claim 3, characterized in that: The support structure comprises: a plurality of elastic tubes, a plurality of connecting rods and a plurality of support wires used to be tied to the elastic tubes; A plurality of the elastic tubes are plugged together to form a plurality of groups of the elastic tubes; the plurality of groups of the elastic tubes are arranged in a rectangular array to form a rectangular area; the connecting rod is used to fix the plurality of groups of the elastic tubes; The support wire is fixed on the connecting rod, and the support wire extends along the plugging direction of the elastic tube and is distributed around the rectangular area; The support wire is elastic; when the elastic thermal insulation film expands and contracts, the multiple groups of elastic tubes and the multiple support wires are extended or shortened; The rectangular area matches the vacuum area.

7. A liquid chlorine unloading crane leak testing system according to claim 6, characterized in that: The support structure further includes a staggered line, which is fixed on the plurality of elastic tubes in a direction perpendicular to the support line. The staggered line is located inside the rectangular area, and the staggered line abuts against the support line.

8. A liquid chlorine unloading crane leak testing system according to claim 7, characterized in that: The temperature detection member is used to form an annular temperature monitoring area outside the thermal insulation structure; the thermal insulation structure is located in the annular temperature monitoring area.

9. A liquid chlorine unloading crane leak testing system according to claim 8, characterized in that: The temperature detection component includes a temperature sensor and a temperature transfer structure; the temperature transfer structure is used to form the annular temperature monitoring area; the temperature sensor is used to obtain the temperature of the annular temperature monitoring area.

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