Gas leakage detection device and gas leakage detection method

Abstract

The invention relates to a gas leakage detection device and a gas leakage detection method, which can solve the problem of low detection accuracy of a gas leakage detection mode related to a high-voltage GIS (Gas Insulated Switchgear) in the related art, and the gas leakage detection device comprises a shell, a voltage equalizing assembly, a temperature detection assembly and a separation structure, the shell comprises at least two closed cavities and communicating parts, the adjacent closed cavities are communicated through the communicating parts, the closed cavities are used for being filled with gas to be detected, the pressure equalizing assembly comprises pressure detection structures and an inflation assembly, each closed cavity is provided with one pressure detection structure, and the inflation assembly is communicated with the closed cavities and used for supplementing the gas to be detected to the closed cavities; the temperature detection assembly comprises a temperature detection structure and a heat exchange assembly, the temperature detection structure is connected with the closed cavities, at least part of the heat exchange assembly is arranged on the communicating part and used for heating the to-be-detected gas flowing through the communicating part, and the separation structure is arranged on the communicating part and used for communicating or blocking the adjacent closed cavities.

Description

Technical Field

[0001] The present application relates to the technical field of gas leakage detection, and particularly to a gas leakage detection device and a gas leakage detection method. Background Art

[0002] High-voltage GIS (GAS INSULATED SWITCHGEAR) is usually filled with sulfur hexafluoride gas. To avoid sulfur hexafluoride gas leakage, it is necessary to maintain real-time and accurate detection of the gas state.

[0003] In the related art, generally, the pressure change is directly detected inside the high-voltage GIS to perform real-time leakage detection of sulfur hexafluoride gas, or sulfur hexafluoride gas is collected outside the high-voltage GIS to achieve leakage detection.

[0004] However, the gas leakage detection methods in the related art cannot accurately find the leakage location, and the pressure of sulfur hexafluoride gas changes with temperature. Directly detecting the pressure change inside the high-voltage GIS will be affected by temperature factors, resulting in low detection accuracy. Summary of the Invention

[0005] Based on this, it is necessary to provide a gas leakage detection device and a gas leakage detection method for the problem of low detection accuracy of the gas leakage detection method for high-voltage GIS in the related art.

[0006] According to one aspect of the present application, the present application provides a gas leakage detection device, and the gas leakage detection device includes:

[0007] A housing, including at least two closed cavities and a connecting part, adjacent closed cavities are connected through the connecting part, and the closed cavities are used for filling the gas to be detected;

[0008] A pressure equalizing component, including a pressure detection structure and an inflation component, each closed cavity is provided with one pressure detection structure, and the inflation component is connected to the closed cavity and is used to supplement the gas to be detected into the closed cavity;

[0009] A temperature detection component, including a temperature detection structure and a heat exchange component, the temperature detection structure is connected to the closed cavity, and at least a part of the heat exchange component is arranged in the connecting part and is used to heat the gas to be detected flowing through the connecting part;

[0010] A partition structure, which is arranged in the connecting part and is used to connect or block adjacent closed cavities.

[0011] In one embodiment, the housing is provided with at least two partition members, and the partition members are spaced apart inside the housing and divide the interior of the housing into respective closed cavities, and the communication part is arranged on the partition members.

[0012] In one embodiment, the communication part is configured as a heat exchange cavity, and the heat exchange assembly includes a circulation pipeline and a heater. The heater is arranged on the circulation pipeline. At least part of the circulation pipeline penetrates through the partition member and is connected to the inflation assembly, and at least part of the circulation pipeline is arranged opposite to the heat exchange cavity.

[0013] In one embodiment, the partition structure is configured to be arranged at a part of the circulation pipeline opposite to the heat exchange cavity, and the partition structure can expand and deform to fill the heat exchange cavity.

[0014] In one embodiment, the gas leakage detection device further includes a gas supplement pipeline. One end of the gas supplement pipeline is communicated with the closed cavity, and the other end of the gas supplement pipeline is communicated with the circulation pipeline.

[0015] In one embodiment, a conduction member is arranged on the circulation pipeline, and the other end of the gas supplement pipeline is connected to the conduction member.

[0016] In one embodiment, the inflation assembly includes a high-pressure storage bin, a pressure equalizing buffer bin and a delivery pump. One end of the pressure equalizing buffer bin is connected to the high-pressure storage bin, the other end of the pressure equalizing buffer bin is connected to the delivery pump, and the end of the delivery pump away from the pressure equalizing buffer bin is connected to the circulation pipeline.

[0017] In one embodiment, the pressure detection structure includes a comparison assembly, a floating assembly and an early warning assembly. The comparison assembly is provided with a preset air pressure. The floating assembly is communicated with the closed cavity. The floating assembly has a real-time air pressure equal to that of the closed cavity. Both the comparison assembly and the floating assembly are connected to the early warning assembly. When the real-time air pressure is less than the preset air pressure, the early warning assembly starts to give an early warning.

[0018] In one embodiment, a first cavity and a second cavity are provided on the housing. The control assembly includes a first airbag and a first pressing structure. The first airbag is disposed in the first cavity and is in contact with the first pressing structure. The floating assembly includes a second airbag and a second pressing structure. The second airbag is disposed in the second cavity and is in contact with the second pressing structure. The warning assembly includes a lever structure, a first conductive block, and a second conductive block. The lever structure includes a conductive first end and a second end. The first pressing structure is in contact with the first end, and the second pressing structure is in contact with the second end. When the real-time air pressure is less than the preset air pressure, the lever structure is driven to rotate until the first end and the second end are respectively in electrical conduction with the first conductive block and the second conductive block.

[0019] According to another aspect of the present application, the present application provides a gas leakage detection method, which uses the above gas leakage detection device. The gas leakage detection method includes the steps of:

[0020] Keep the closed cavities communicating with each other;

[0021] Perform a first detection of the real-time air pressure in the closed cavity through the pressure detection structure, and the pressure detection structure is provided with a preset air pressure;

[0022] When the real-time air pressure is lower than the preset air pressure, start the temperature detection structure and detect the real-time temperature in the closed cavity;

[0023] The temperature detection structure is provided with a preset temperature. If the real-time temperature is equal to the preset temperature, directly determine that there is a leakage in the closed cavity; if the real-time temperature is lower than the preset temperature, start the heat exchange assembly and heat the gas to be detected to the preset temperature, and perform a second detection of the real-time air pressure in the closed cavity through the pressure detection structure. If the real-time air pressure is lower than the preset air pressure, directly determine that there is a leakage in the closed cavity;

[0024] Start the inflation assembly and supplement the gas to be detected into the closed cavity to restore the preset air pressure;

[0025] Start the partition structure to block adjacent closed cavities;

[0026] Perform a third detection of the real-time air pressure in the closed cavity through the pressure detection structure;

[0027] When the real-time air pressure detected by at least one of the pressure detection structures is lower than the preset air pressure, directly determine that the leakage position is the closed cavity detected by the pressure detection structure.

[0028] The above gas leakage detection device and gas leakage detection method first detect the real-time air pressure in the closed cavity through the pressure detection structure, and compare the real-time air pressure with the preset air pressure, which helps to realize the gas leakage warning function. When it is detected that the real-time air pressure is lower than the preset air pressure, the temperature detection structure is started to detect the real-time temperature in the closed cavity. If the real-time temperature is lower than the preset temperature, the heat exchange component is started to heat the gas to be detected to the preset temperature, which helps to eliminate the influence of the change of the pressure of the gas to be detected with temperature, so that the second real-time air pressure detection can be carried out in the closed cavity at the preset temperature, improving the detection accuracy. In addition, when it is judged that there is a leakage in the closed cavity, the inflation component is started to supplement the gas to be detected into the closed cavity to restore the preset air pressure, and the partition structure separates the adjacent closed cavities, so that each closed cavity is separated into a relatively independent space. Then, when the third real-time air pressure detection of the closed cavity is carried out through the pressure detection structure, it helps to directly find the deflated closed cavity with gas leakage by judging the real-time air pressure detected by the pressure detection structure, improving the detection accuracy and facilitating the subsequent maintenance work. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the gas leakage detection device in an embodiment of the present application.

[0030] Figure 2 is Figure 1 A schematic structural diagram of the gas leakage detection device shown in another perspective.

[0031] Figure 3 is Figure 1 A top view of the gas leakage detection device shown.

[0032] Figure 4 is Figure 3 A cross-sectional view of the gas leakage detection device shown at A-A.

[0033] Figure 5 is Figure 3 A cross-sectional view of the gas leakage detection device shown at B-B.

[0034] Figure 6 is Figure 5 An enlarged view of the gas leakage detection device shown at C.

[0035] Figure 7 It is a flowchart of the gas leakage detection method in an embodiment of the present application.

[0036] Description of the Reference Numerals in the Drawings

[0037] 1. Gas leakage detection device; 100. Housing; 100a. Closed cavity; 100b. Communication part; a1. Heat exchange cavity; a2. Through hole; 110. First cavity; 120. Second cavity; 200. Pressure equalizing assembly; 210. Pressure detection structure; 211. Control component; 2111. First airbag; 2112. First pressing structure; 21121. First pressing plate; 21122. First pressing block; 21123. First sliding rod; 212. Floating component; 2121. Second airbag; 2122. Second pressing structure; 21221. Second pressing plate; 21222. Second pressing block; 21223. Second sliding rod; 213. Warning component; 2131. Lever structure; 21311. First end; 21312. Second end; 2132. First conductive block; 2133. Second conductive block; 220. Inflation component; 221. High-pressure storage bin; 222. Pressure equalizing buffer bin; 223. Delivery pump; 300. Temperature detection component; 310. Temperature detection structure; 320. Heat exchange component; 321. Circulation pipeline; 3211. Intake pipeline assembly; 3212. Exhaust pipeline assembly; 3213. Connecting pipeline; 3214. Conductive part; 322. Heater; 400. Partition structure; 500. Partition piece; 600. Air supply pipeline; 700. Support rod assembly. Detailed implementation manners

[0038] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0040] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0044] Considering that existing high-voltage GIS generally detects air pressure changes directly inside or collects sulfur hexafluoride gas outside to achieve leakage detection. However, neither of these detection methods can accurately locate the leakage position, and the pressure of sulfur hexafluoride gas changes with temperature. Detecting air pressure changes directly inside the high-voltage GIS is affected by temperature factors, resulting in low detection accuracy. This application provides a gas leakage detection device and a gas leakage detection method, which can overcome the influence of the factor that the pressure of the gas to be measured changes with temperature, and can accurately locate the leakage position, with high detection accuracy, facilitating application and promotion.

[0045] Specifically, please refer to Figure 1 and Figure 2 , an embodiment of this application provides a gas leakage detection device 1, which may include a housing 100, a pressure equalizing component 200, and a temperature detection component 300. The pressure equalizing component 200 includes a pressure detection structure 210 and an inflation component 220. The temperature detection component 300 includes a temperature detection structure 310 and a heat exchange component 320. Combining Figure 3 and Figure 4 shown, the gas leakage detection device 1 further includes a partition structure 400. Continuing to refer to Figure 5 , the housing 100 includes at least two closed cavities 100a and a communication part 100b. Adjacent closed cavities 100a are communicated through the communication part 100b, and the closed cavities 100a are used to fill the gas to be measured. Each closed cavity 100a is provided with a pressure detection structure 210. The inflation component 220 is communicated with the closed cavity 100a and is used to supplement the gas to be measured to the closed cavity 100a. The temperature detection structure 310 is connected to the closed cavity 100a and is used to detect the real-time temperature in the closed cavity 100a. Referring back to Figure 4 , at least part of the heat exchange component 320 is arranged in the communication part 100b and is used to heat the gas to be measured flowing through the communication part 100b. The partition structure 400 is arranged in the communication part 100b and is used to connect or block adjacent closed cavities 100a.

[0046] Referring to Figure 7 , according to the above embodiment of this application, this application also provides a gas leakage detection method. Using the above gas leakage detection device 1, the gas leakage detection method includes the steps of:

[0047] S1. Keep each closed cavity 100a communicating with each other.

[0048] S2. Perform a first detection of the real-time air pressure in the closed cavity 100a through the pressure detection structure 210, and the pressure detection structure 210 is provided with a preset air pressure.

[0049] S3. When the real-time air pressure is lower than the preset air pressure, start the temperature detection structure 310 and detect the real-time temperature in the closed cavity 100a.

[0050] S4. The temperature detection structure 310 is provided with a preset temperature. If the real-time temperature is equal to the preset temperature, it is directly determined that there is a leak in the closed cavity 100a. If the real-time temperature is lower than the preset temperature, the heat exchange component 320 is started to heat the gas to be measured to the preset temperature, and the real-time air pressure in the closed cavity 100a is detected for the second time through the pressure detection structure 210. If the real-time air pressure is lower than the preset air pressure, it is directly determined that there is a leak in the closed cavity 100a.

[0051] S5. Start the gas filling component 220 and supplement the gas to be measured into the closed cavity 100a to restore the preset air pressure.

[0052] S6. Start the partition structure 400 to block the adjacent closed cavities 100a.

[0053] S7. Detect the real-time air pressure in the closed cavity 100a for the third time through the pressure detection structure 210.

[0054] S8. When the real-time air pressure detected by at least one of the pressure detection structures 210 is lower than the preset air pressure, it is directly determined that the leak location is the closed cavity 100a detected by the pressure detection structure 210.

[0055] The above gas leak detection device 1 and gas leak detection method detect the real-time air pressure in the closed cavity 100a for the first time through the pressure detection structure 210 and compare the real-time air pressure with the preset air pressure, which helps to realize the gas leak warning function. When it is detected that the real-time air pressure is lower than the preset air pressure, the temperature detection structure 310 is started to detect the real-time temperature in the closed cavity 100a. If the real-time temperature is lower than the preset temperature, the heat exchange component 320 is started to heat the gas to be measured to the preset temperature, which helps to eliminate the influence of the change of the pressure of the gas to be measured with temperature, so that the second real-time air pressure detection can be carried out in the closed cavity 100a at the preset temperature, improving the detection accuracy.

[0056] In addition, when it is determined that there is a leak in the closed cavity 100a, the gas filling component 220 is started to supplement the gas to be measured into the closed cavity 100a to restore the preset air pressure, and the partition structure 400 blocks the adjacent closed cavities 100a, so as to separate each closed cavity 100a into relatively independent spaces. Then, when the real-time air pressure in the closed cavity 100a is detected for the third time through the pressure detection structure 210, it helps to directly find the pressure-relieving closed cavity 100a where the gas leak occurs by judging the real-time air pressure detected by the pressure detection structure 210, improving the detection accuracy and facilitating the subsequent maintenance work.

[0057] It should be noted that the gas leakage detection device 1 and the gas leakage detection method provided in this application can be, but are not limited to, applicable to the leakage detection of sulfur hexafluoride gas in high-voltage GIS. In other application scenarios, the gas leakage detection device 1 and the gas leakage detection method provided in this application can also be applicable to the leakage detection of other gases whose pressure changes with temperature, which will not be elaborated here.

[0058] It is worth noting that before performing step "S5. Start the gas filling component 220 and replenish the gas to be detected into the closed cavity 100a to restore the preset air pressure", the partitioning structure 400 needs to always maintain a connected state, that is, each closed cavity 100a can be kept connected through the connecting part 100b, and the connecting part 100b is not blocked by the partitioning structure 400.

[0059] Optionally, the partitioning structure 400 can be, but is not limited to, implemented as a lifting partition board or an opening and closing door, etc. It can be understood that as long as the solution can achieve blocking adjacent closed cavities 100a, it falls within the protection scope of this application, which will not be elaborated here.

[0060] Optionally, in combination with Figure 5 As shown, the housing 100 can be provided with at least two partition members 500. Each partition member 500 is arranged at intervals inside the housing 100 and divides the inside of the housing 100 into respective closed cavities 100a. The connecting part 100b is arranged on the partition member 500. In this way, the partition member 500 can divide the inside of the housing 100 into respective independent spaces, providing a structural basis for subsequent detection of the leakage location of the gas to be detected.

[0061] Optionally, the partition member 500 can be, but is not limited to, implemented as a partition plate member, etc.

[0062] Optionally, the connecting part 100b can be, but is not limited to, implemented as a through hole or a channel provided on the partition member 500, etc.

[0063] Preferably, in combination with Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment, the connecting part 100b can be configured as a heat exchange cavity a1. The heat exchange component 320 can include a circulation pipeline 321 and a heater 322. The heater 322 is arranged on the circulation pipeline 321. At least part of the circulation pipeline 321 penetrates through the partition member 500 and is connected to the gas filling component 220, and at least part of the circulation pipeline 321 is arranged opposite to the heat exchange cavity a1. In this way, it helps to pass a circulating airflow through the circulation pipeline 321 through the gas filling component 220 and heat it through the heater 322, so as to realize heat exchange of at least part of the circulation pipeline 321 for the gas to be detected flowing through the heat exchange cavity a1, and then realize heat transfer to the whole closed cavity 100a. The structure is simple and reliable.

[0064] It should be noted that, in this embodiment, the separator 500 may have a certain thickness, at least part of the circulation pipeline 321 penetrates along the radial direction of the separator 500, and a sealed setting is formed between the heat exchange chamber a1 and the circulation pipeline 321, which helps to avoid gas leakage in the closed chamber 100a.

[0065] Optionally, at least part of the separator 500, the circulation pipeline 321 and the housing 100 may but are not limited to be integrally formed, which helps to further improve the airtightness.

[0066] Optionally, in combination Figure 1 and Figure 2 As shown, the circulation pipeline 321 may include an intake pipeline assembly 3211, an outlet pipeline assembly 3212 and a connecting pipeline 3213. The intake pipeline assembly 3211 may be connected to one side of the housing 100, the outlet pipeline assembly 3212 may be connected to the other side of the housing 100, one end of the connecting pipeline 3213 may be connected to the intake end of the intake pipeline assembly 3211, and the other end of the connecting pipeline 3213 may be connected to the outlet end of the outlet pipeline assembly 3212. In this way, a setting is realized in which each closed chamber 100a has a circulating heat flow for heating, and the structure is simple and reliable.

[0067] Preferably, as shown in Figure 2 , the heater 322 may be arranged on the connecting pipeline 3213, which helps to optimize the structural layout and reduce the problem of structural interference. Of course, theoretically, the heater 322 may be arranged at any position on the circulation pipeline 321, and after a period of gas circulation, the overall heating effect of the closed chamber 100a can be achieved.

[0068] Optionally, as shown in Figure 4 , the partition structure 400 may be configured to be arranged on the part of the circulation pipeline 321 opposite to the heat exchange chamber a1, and the partition structure 400 can be expanded and deformed to fill the heat exchange chamber a1, so as to realize separating each closed chamber 100a into relatively independent spaces.

[0069] It should be noted that by configuring the partition structure 400 to be arranged on the part of the circulation pipeline 321 opposite to the heat exchange chamber a1, this helps to improve the structural integration of the partition structure 400 and the circulation pipeline 321, realizes the integration of the heating function of the circulation pipeline 321 and the function of blocking the closed chamber 100a, simplifies the structural setting of the gas leakage detection device 1 and reduces the manufacturing cost.

[0070] Optionally, according to the above embodiment of the present application, the partition structure 400 may but is not limited to be implemented as an expansion film or an expansion airbag, etc.

[0071] Specifically, continue to refer to Figure 4 , the connecting part 100b further includes through holes a2 provided on the closed cavities 100a on both sides of the heat exchange cavity a1. When the partition structure 400 expands and deforms to fill the heat exchange cavity a1, the conduction between adjacent through holes a2 can be blocked, thus separating each closed cavity 100a into relatively independent spaces.

[0072] Optionally, as shown in combination with Figure 2 , the gas leakage detection device 1 may further include a gas supplement pipeline 600. One end of the gas supplement pipeline 600 communicates with the closed cavity 100a, and the other end of the gas supplement pipeline 600 communicates with the circulation pipeline 321. Thus, when performing step "S5. Start the inflation component 220 and supplement the test gas into the closed cavity 100a until the closed cavity 100a restores the preset air pressure", it is only necessary to directly introduce the test gas in the circulation pipeline 321 into the closed cavity 100a inside the housing 100 through the gas supplement pipeline 600. This helps to improve the structural integration, optimizes the detection steps, and improves the detection efficiency.

[0073] Of course, in some other embodiments, a gas supplement structure (not shown) can be separately provided. The gas supplement structure is used to communicate with the closed cavity 100a inside the housing 100 and is used to supplement the test gas into the closed cavity 100a until the closed cavity 100a restores the preset air pressure, which will not be elaborated here.

[0074] Optionally, continue to refer to Figure 2 , a conduction member 3214 is provided on the circulation pipeline 321. One end of the gas supplement pipeline 600 communicates with the closed cavity 100a, and the other end of the gas supplement pipeline 600 is connected to the conduction member 3214. Thus, when performing step "S4. Start the heat exchange component 320 and heat the test gas to the preset temperature", the conduction member 3214 can be closed, so as to realize the closed-loop circulation flow of the heat flow in the circulation pipeline 321, and then complete the heating of the closed cavity 100a.

[0075] In addition, when performing step "S5. Start the inflation component 220 and supplement the test gas into the closed cavity 100a until the closed cavity 100a restores the preset air pressure", the conduction member 3214 can be opened, so as to directly supplement the test gas in the circulation pipeline 321 into the closed cavity 100a inside the housing 100.

[0076] Furthermore, when performing step "S6. Start the partition structure 400 to block adjacent closed cavities 100a", the conduction member 3214 can be closed, and the inflation component 220 is continuously used to ventilate the circulation pipeline 321, so that the partition structure 400 expands by itself through the aggregation of gas, thus realizing the blocking of adjacent closed cavities 100a.

[0077] Optionally, the conducting member 3214 may be implemented as, but not limited to, a three-way valve or the like. The three-way valve is respectively connected to the communicating pipe 3213, the air outlet pipe assembly 3212, and the air supplement pipe 600.

[0078] It should be noted that when performing step "S5. Start the inflation assembly 220 and supplement the gas to be measured into the closed cavity 100a to restore the preset air pressure", the purpose is to raise the overall pressure of each connected closed cavity 100a after leakage to a relatively high pressure level, so as to facilitate observing the pressure relief during the third detection of the pressure detection structure 210 later.

[0079] Therefore, when directly supplementing the gas to be measured in the circulation pipe 321 into the closed cavity 100a inside the housing 100, theoretically, the influence of the change in the air pressure of the closed cavity 100a caused by the change in the pressure of the gas to be measured with temperature can be ignored. The user only needs to compare the pressure relief change values between the air pressures of each closed cavity 100a. The closed cavity 100a with a more significant pressure relief can be directly determined as the location of gas leakage.

[0080] Of course, before performing step "S5. Start the inflation assembly 220 and supplement the gas to be measured into the closed cavity 100a to restore the preset air pressure", the hot flow in the circulation pipe 321 can also be cooled first and then introduced into the closed cavity 100a, so as to completely eliminate the influence caused by the change in the pressure of the supplemented gas with temperature and improve the detection accuracy.

[0081] Optionally, referring back to Figure 1 , the inflation assembly 220 may include a high-pressure storage bin 221, a pressure equalizing buffer bin 222, and a delivery pump 223. One end of the pressure equalizing buffer bin 222 is connected to the high-pressure storage bin 221, the other end of the pressure equalizing buffer bin 222 is connected to the delivery pump 223, and the end of the delivery pump 223 away from the pressure equalizing buffer bin 222 is connected to the circulation pipe 321. This helps to improve the quality of the gas to be measured supplemented into the closed cavity 100a, and also helps to improve the fluidity and stability of the gas to be measured.

[0082] Optionally, referring to Figure 6 , the pressure detection structure 210 may include a comparison component 211, a floating component 212, and an early warning component 213. The comparison component 211 is provided with a preset air pressure. The floating component 212 is communicated with the closed cavity 100a. The floating component 212 has a real-time air pressure equal to that of the closed cavity 100a. Both the comparison component 211 and the floating component 212 are connected to the early warning component 213. When the real-time air pressure is less than the preset air pressure, the early warning component 213 starts to give an early warning, thus realizing the leakage detection of the gas to be measured.

[0083] Optionally, the reference component 211 can be, but is not limited to, implemented as a standard pressure device, the floating component 212 can be, but is not limited to, implemented as a pressure detector, etc., and the warning component 213 can be, but is not limited to, implemented as an alarm, etc.

[0084] Optionally, continue to refer to Figure 6 , in order to improve the structural integration and detection accuracy of the pressure detection structure 210, the following improvements are made to the pressure detection structure 210 in this application.

[0085] The housing 100 can be provided with a first chamber 110 and a second chamber 120. The reference component 211 can include a first airbag 2111 and a first pressing structure 2112. The first airbag 2111 is disposed in the first chamber 110, and the first airbag 2111 is in contact with the first pressing structure 2112. The floating component 212 can include a second airbag 2121 and a second pressing structure 2122. The second airbag 2121 is disposed in the second chamber 120, and the second airbag 2121 is in contact with the second pressing structure 2122. The warning component 213 can include a lever structure 2131, a first conductive block 2132, and a second conductive block 2133. The lever structure 2131 includes a conductive first end 21311 and a second end 21312. The first pressing structure 2112 is in contact with the first end 21311, and the second pressing structure 2122 is in contact with the second end 21312. When the real-time air pressure is less than the preset air pressure, the lever structure 2131 is driven to rotate until the first end 21311 and the second end 21312 are respectively electrically connected to the first conductive block 2132 and the second conductive block 2133, so as to realize the real-time air pressure detection of the closed chamber 100a. Understandably, the first conductive block 2132 and the second conductive block 2133 can be, but are not limited to, electrically connected to an alarm or an air pressure display, etc.

[0086] Optionally, the first airbag 2111 is in a closed state, and its air pressure can be maintained at a preset air pressure.

[0087] Exemplarily, in combination with Figure 6As shown, taking the closed cavity 100a with a gas leakage situation as an example, when the closed cavity 100a is filled with the gas to be measured by the inflation assembly 220 to a preset air pressure, the first pressing structure 2112 and the second pressing structure 2122 will receive a downward pressure of the same preset air pressure value. Therefore, the first pressing structure 2112 and the second pressing structure 2122 press the lever structure 2131 with the same magnitude of force, and make the lever structure 2131 in a balanced static state. The first end 21311 and the second end 21312 of the lever structure 2131 are respectively in a non-contact state with the first conductive block 2132 and the second conductive block 2133. When the gas to be measured in the closed cavity 100a leaks, the air pressure in the closed cavity 100a will gradually decrease. Since the first airbag 2111 is in a closed state, it maintains the preset air pressure value unchanged and is greater than the real-time air pressure of the second airbag 2121 at this time. Therefore, the first airbag 2111 will expand under the action of the pressure difference and press the first pressing structure 2112 to move downward, causing the lever structure 2131 to rotate. The lever structure 2131 is driven to rotate until the first end 21311 and the second end 21312 are respectively electrically connected to the first conductive block 2132 and the second conductive block 2133.

[0088] Optionally, referring back to Figure 6 , the first pressing structure 2112 may include a first pressing plate 21121, a first pressing block 21122 and a first sliding rod 21123. The first sliding rod 21123 is arranged on the housing 100. The first pressing block 21122 is sleeved on the first sliding rod 21123, and one end of the first pressing block 21122 abuts against the first end 21311 of the lever structure 2131, and the other end of the first pressing block 21122 is connected to the first pressing plate 21121; the second pressing structure 2122 may include a second pressing plate 21221, a second pressing block 21222 and a second sliding rod 21223. The second sliding rod 21223 is arranged on the housing 100. The second pressing block 21222 is sleeved on the second sliding rod 21223, and one end of the second pressing block 21222 abuts against the second end 21312 of the lever structure 2131, and the other end of the second pressing block 21222 is connected to the second pressing plate 21221. In this way, the first pressing block 21122 and the second pressing block 21222 can slide along the first sliding rod 21123 and the second sliding rod 21223 respectively, and are used to press the lever structure 2131 to keep the lever structure 2131 in a balanced state or to make the lever structure 2131 rotate.

[0089] Optionally, referring back to Figures 1 to 5 , the gas leakage detection device 1 may include a support rod assembly 700. The support rod assembly 700 is arranged through the housing 100 along the axial direction of the housing 100, which helps to improve the overall connection strength of the respective partition members 500.

[0090] Optionally, the above temperature detection structure 310 can be, but is not limited to, implemented as a thermometer or the like. Optionally, the thermometer can be disposed through the housing 100 and is used to detect the real-time temperature in the closed cavity 100a and obtain the ambient temperature change.

[0091] Optionally, the gas leakage detection device 1 of the present application may further include a controller (not shown). The pressure equalizing assembly 200, the temperature detection assembly 300, and the partition structure 400 can be, but are not limited to, controlled and connected to the controller. The controller can be respectively used to control the foregoing pressure equalizing assembly 200, temperature detection assembly 300, and partition structure 400 to perform corresponding steps according to the foregoing gas leakage detection method, improving the detection efficiency of the gas leakage detection device 1.

[0092] It can be understood that according to the above embodiments of the present application, when the partition structure 400 is configured to be disposed at a portion of the circulation pipeline 321 opposite to the heat exchange cavity a1 and the partition structure 400 can expand and deform to fill the heat exchange cavity a1, the partition structure 400 can directly expand by the gas accumulation effect in the circulation pipeline 321. At this time, there is no need for the partition structure 400 to be controlled and connected to the controller.

[0093] It can also be understood that according to the above embodiments of the present application, when the partition structure 400 is implemented as a lifting partition or an opening and closing door or the like, the partition structure 400 can be controlled and connected to the controller, so that the communication and blocking functions of the partition structure 400 can be directly controlled by the controller.

[0094] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0095] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gas leakage detection device, characterized in that: The gas leakage detection device comprises: A housing, comprising at least two closed cavities and a connecting portion, wherein adjacent closed cavities are connected via the connecting portion, and the closed cavities are used to be filled with a gas to be tested; A pressure equalizing component, comprising a pressure detection structure and an inflation component, each of the closed cavities is provided with a pressure detection structure, and the inflation component is in communication with the closed cavity and is used to replenish the gas to be measured into the closed cavity; A temperature detection component, comprising a temperature detection structure and a heat exchange component, wherein the temperature detection structure is connected to the closed cavity, and at least a portion of the heat exchange component is disposed in the connecting portion and is used to heat the gas to be detected flowing through the connecting portion; A partition structure is arranged at the connecting portion and is used to connect or block adjacent closed cavities.

2. The gas leakage detection device according to claim 1, characterized in that: The shell is provided with at least two partitions, each of which is arranged at intervals inside the shell and divides the inside of the shell into each of the closed cavities, and the connecting portion is arranged on the partition.

3. The gas leakage detection device according to claim 2, characterized in that: The connecting portion is configured as a heat exchange chamber, and the heat exchange component includes a circulation pipe and a heater, the heater is arranged on the circulation pipe, at least a portion of the circulation pipe passes through the partition and is connected to the inflation component, and at least a portion of the circulation pipe is arranged opposite to the heat exchange chamber.

4. The gas leakage detection device according to claim 3, characterized in that: The partition structure is configured to be disposed at a portion of the circulation pipe opposite to the heat exchange chamber, and the partition structure can expand and deform to fill the heat exchange chamber.

5. The gas leakage detection device according to claim 3, characterized in that: The gas leakage detection device further comprises an air supply pipeline, one end of which is communicated with the closed cavity, and the other end of which is communicated with the circulation pipeline.

6. The gas leakage detection device according to claim 5, characterized in that: The circulation pipeline is provided with a conducting piece, and the other end of the air supply pipeline is connected to the conducting piece.

7. The gas leakage detection device according to claim 3, characterized in that: The inflation assembly includes a high-pressure storage bin, a pressure equalizing buffer bin and a delivery pump, one end of the pressure equalizing buffer bin is connected to the high-pressure storage bin, the other end of the pressure equalizing buffer bin is connected to the delivery pump, and the end of the delivery pump away from the pressure equalizing buffer bin is connected to the circulation pipeline.

8. The gas leakage detection device according to claim 3, characterized in that: The pressure detection structure includes a control component, a floating component and an early warning component. The control component is provided with a preset air pressure. The floating component is communicated with the closed cavity. The floating component has a real-time air pressure equal to that of the closed cavity. The control component and the floating component are both connected to the early warning component. When the real-time air pressure is lower than the preset air pressure, the early warning component activates an early warning.

9. The gas leakage detection device according to claim 8, characterized in that: The shell is provided with a first cavity and a second cavity, the control component includes a first airbag and a first pressing structure, the first airbag is arranged in the first cavity, and the first airbag abuts against the first pressing structure, the floating component includes a second airbag and a second pressing structure, the second airbag is arranged in the second cavity, and the second airbag abuts against the second pressing structure, the early warning component includes a lever structure, a first conductive block and a second conductive block, the lever structure includes a conductive first end and a second end, the first pressing structure abuts against the first end, and the second pressing structure abuts against the second end, when the real-time air pressure is less than the preset air pressure, the lever structure is driven to rotate until the first end and the second end are electrically connected to the first conductive block and the second conductive block respectively.

10. A gas leakage detection method, using the gas leakage detection device according to any one of claims 1 to 9, characterized in that: The gas leakage detection method comprises the steps of: Keep the closed cavities connected to each other; Performing a first detection of the real-time air pressure of the closed cavity by a pressure detection structure, wherein the pressure detection structure is provided with a preset air pressure; When the real-time air pressure is lower than the preset air pressure, the temperature detection structure is started to detect the real-time temperature of the closed cavity; The temperature detection structure is provided with a preset temperature. If the real-time temperature is equal to the preset temperature, it is directly judged that the closed cavity has a leak; if the real-time temperature is lower than the preset temperature, the heat exchange component is started and the gas to be tested is heated to the preset temperature, and the real-time air pressure of the closed cavity is secondly detected by the pressure detection structure. If the real-time air pressure is lower than the preset air pressure, it is directly judged that the closed cavity has a leak; Start the inflation component and replenish the gas to be tested into the closed cavity to restore the preset gas pressure; Activating the partition structure to block the adjacent closed cavities; Performing a third detection of the real-time air pressure of the closed cavity by means of the pressure detection structure; When the real-time air pressure detected by at least one of the pressure detection structures is lower than the preset air pressure, the leakage location is directly determined to be the closed cavity detected by the pressure detection structure.

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