Gas content detection system

Abstract

The utility model provides a gas content detection system which comprises a sampling pipeline and a filtering structure, the sampling pipeline is used for being communicated with a pipeline to be sampled, the filtering structure is arranged on the sampling pipeline, and sampling fluid of the sampling pipeline is filtered through the filtering structure; the detection pipeline is selectively communicated with or disconnected from the filtering structure, and the gas content detection piece and the jet pump are arranged on the detection pipeline at an interval; the gas inlet end of the gas supply pipeline is used for introducing protective gas, and the outlet end of the gas supply pipeline selectively communicates with the filtering structure or the jet pump; when the detection pipeline is communicated with the filtering structure, the outlet end of the air supply pipeline is communicated with the drainage opening of the jet pump; when the detection pipeline is disconnected from the filtering structure, the outlet end of the air supply pipeline is communicated with the filtering structure. By adopting the gas content detection system provided by the utility model, the problem that a gas pipeline in a gas content detection system in the prior art is easy to block can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas content detection devices, in particular to a gas content detection system. Background Art

[0002] In the prior art, when detecting the gas content during the crushing process of lithium batteries, a crushing device and a gas content detection device are often connected through a coil, so that the specific gas content in the crushing device is detected by the gas content detection device.

[0003] However, detecting gas content using this method often results in pipeline blockage, which can cause the gas content detection system to fail to function properly. Utility Model Content

[0004] The main purpose of the utility model is to provide a gas content detection system to solve the problem that the gas pipeline in the gas content detection system in the prior art is prone to blockage.

[0005] In order to achieve the above object, the utility model provides a gas content detection system, comprising:

[0006] A sampling pipeline and a filtering structure, wherein the sampling pipeline is used to communicate with the pipeline to be sampled, and a filtering structure is provided on the sampling pipeline to filter the sampling fluid in the sampling pipeline through the filtering structure;

[0007] A detection pipeline, a gas content detection element and a jet pump, wherein the detection pipeline can be selectively connected or disconnected with the filtering structure, and the gas content detection element and the jet pump are arranged on the detection pipeline at intervals;

[0008] An air supply pipeline, the air inlet end of the air supply pipeline is used to introduce protective gas, and the outlet end of the air supply pipeline can be selectively connected to a filtering structure or a jet pump; when the detection pipeline is connected to the filtering structure, the outlet end of the air supply pipeline is connected to the drainage port of the jet pump; when the detection pipeline is disconnected from the filtering structure, the outlet end of the air supply pipeline is connected to the filtering structure.

[0009] Furthermore, the gas content detection system also includes:

[0010] A first switching valve, the first switching valve having a first communicating port, a second communicating port and a third communicating port, the first communicating port being communicated with the filter structure, the second communicating port being communicated with the detection pipeline, and the third communicating port being communicated with the air supply pipeline;

[0011] Among them, the first switching valve has a first switching state and a second switching state; when the first switching valve is in the first switching state, the filter structure is connected to the detection pipeline; when the first switching valve is in the second switching state, the filter structure is connected to the outlet end of the air supply pipeline.

[0012] Further, the first switching valve includes a valve body, a valve core and an operating part, the second communication port and the third communication port are arranged opposite to each other, the valve core is movably arranged in the valve body along the spacing arrangement direction of the second communication port and the third communication port, a part of the operating part is arranged outside the valve body, another part of the operating part passes through the valve body and is connected to the valve core, a part of the operating part is provided with a driving flow path, and the driving flow path extends along the spacing arrangement direction of the second communication port and the third communication port; the gas content detection system also includes:

[0013] A first pipeline and a first solenoid valve, wherein the first solenoid valve is arranged on the first pipeline, one end of the first pipeline is used for passing fluid, and the other end of the first pipeline is connected to one end of the driving flow path;

[0014] a second pipeline and a second solenoid valve, wherein the second solenoid valve is arranged on the second pipeline, one end of the second pipeline is used for passing fluid, and the other end of the second pipeline is connected with the other end of the driving flow path;

[0015] When the first switching valve is in a first switching state, the first solenoid valve is closed and the second solenoid valve is opened; when the first switching valve is in a second switching state, the first solenoid valve is opened and the second solenoid valve is closed.

[0016] Further, one end of the first pipeline is connected to the gas supply pipeline; and / or one end of the second pipeline is connected to the gas supply pipeline.

[0017] Furthermore, the gas content detection system also includes:

[0018] A switch valve is arranged on the connecting pipeline between the outlet end of the air supply pipeline and the drainage port of the jet pump; and / or,

[0019] The speed regulating valve is arranged on the connecting pipeline between the outlet end of the air supply pipeline and the drainage port of the jet pump.

[0020] Furthermore, the gas content detection system also includes:

[0021] A water washing structure is arranged on the detection pipeline, and the water washing structure is located between the filter structure and the gas content detection element, and the water washing structure is used to remove the corrosive gas in the sample gas;

[0022] The condensation structure is arranged on the detection pipeline, and the condensation structure is located between the water washing structure and the gas content detection element.

[0023] Further, the water washing structure comprises:

[0024] A primary water washing component, the primary water washing component has a first water washing inlet and a first water washing outlet, the first water washing inlet is connected to the filter outlet of the filter structure;

[0025] An alcohol washing component, the alcohol washing component has an alcohol washing inlet and an alcohol washing outlet, and the alcohol washing inlet is connected to the first water washing outlet;

[0026] The secondary water washing component has a second water washing inlet and a second water washing outlet, the second water washing inlet is connected to the alcohol washing outlet, and the second water washing outlet is connected to the condensation inlet of the condensation structure.

[0027] Furthermore, the gas content detection system also includes:

[0028] A water vapor separator is arranged on the detection pipeline. The water vapor separator is located between the condensation structure and the gas content detection component. The water vapor separator has a first separation port, a second separation port and a separation cavity connected to the first separation port and the second separation port. The first separation port is located above the second separation port. The first separation port is connected to the gas content detection component, and the second separation port is connected to the inlet of the jet pump.

[0029] Furthermore, the gas content detection system also includes:

[0030] A flow meter is arranged on the detection pipeline and is located between the condensation structure and the gas content detection element;

[0031] An explosion-proof control module is electrically connected to the flow meter.

[0032] Furthermore, the gas content detection system also includes:

[0033] A second switching valve is arranged on the detection pipeline, and the second switching valve has a first connection port, a second connection port and a third connection port, the first connection port is connected to the filter outlet of the filter structure, the second connection port is connected to the gas content detection element, and the third connection port is connected to the outside;

[0034] Among them, the second switching valve has a first adjustment state and a second adjustment state; when the second switching valve is in the first adjustment state, the first connection port is connected with the second connection port; when the second switching valve is in the second adjustment state, the third connection port is connected with the second connection port.

[0035] By applying the technical solution of the utility model, when the sample gas is detected, the detection pipeline is connected with the filter structure, the outlet end of the air supply pipeline is connected with the drainage port of the jet pump, the protective gas is passed into the jet pump, the jet pump provides power to the detection pipeline, so that the sample gas enters the detection pipeline, and the gas content detection component detects the content of at least one gas in the sample gas; when the filter structure or the sampling pipeline is blocked, the detection pipeline is disconnected from the filter structure, the outlet section of the air supply pipeline is connected with the filter structure, and the protective gas is back-blown to the filter structure to clear the filter structure and the sampling pipeline. Therefore, the present application solves the problem that the gas pipeline is easily blocked in the gas content detection system in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0037] Figure 1 A schematic diagram of a gas content detection system provided according to an embodiment of the utility model is shown.

[0038] The above drawings include the following reference numerals:

[0039] 10. Sampling pipeline; 11. Filter structure;

[0040] 20. Detection pipeline; 21. Gas content detection element; 22. Jet pump; 23. Water washing structure; 231. Primary water washing assembly; 232. Alcohol washing assembly; 233. Secondary water washing assembly; 24. Condensation structure; 241. Cold pipe; 242. Cold air pipe; 243. Pressure regulating valve; 244. Condensation pipe; 25. Water vapor separator; 251. First separation port; 252. Second separation port; 26. Flow meter; 27. Second switching valve; 271. First connection port; 272. Second connection port; 273. Third connection port; 28. Water blocking filter;

[0041] 30. First switching valve; 31. First communication port; 32. Second communication port; 33. Third communication port; 34. Operation unit;

[0042] 41, first pipeline; 411, first solenoid valve; 42, second pipeline; 421, second solenoid valve;

[0043] 50. Gas supply pipeline; 51. Switch valve; 52. Speed ​​regulating valve;

[0044] 60. Explosion-proof control module;

[0045] 70. Pipeline to be sampled;

[0046] 80. Standard pressure gas pipeline. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] like Figure 1 As shown, one embodiment of the present application provides a gas content detection system, which includes a sampling pipeline 10, a detection pipeline 20, and an air supply pipeline 50. Among them, the sampling pipeline 10 is used to communicate with the pipeline 70 to be sampled, and a filtering structure 11 is provided on the sampling pipeline 10 to filter the sampled fluid of the sampling pipeline 10 through the filtering structure 11; the detection pipeline 20 can be selectively connected or disconnected with the filtering structure 11, and the gas content detection element 21 and the jet pump 22 are arranged at intervals on the detection pipeline 20; the air inlet end of the air supply pipeline 50 is used to introduce protective gas, and the outlet end of the air supply pipeline 50 can be selectively connected with the filtering structure 11 or the jet pump 22. When the detection pipeline 20 is connected with the filtering structure 11, the outlet end of the air supply pipeline 50 is connected with the drainage port of the jet pump 22; when the detection pipeline 20 is disconnected from the filtering structure 11, the outlet end of the air supply pipeline 50 is connected with the filtering structure 11.

[0051] By using the gas content detection system provided in the present application, when detecting the sample gas, the detection pipeline 20 is connected to the filter structure 11, the outlet end of the air supply pipeline 50 is connected to the drainage port of the jet pump 22, the protective gas is passed into the jet pump 22, the jet pump 22 provides power to the detection pipeline 20 so that the sample gas enters the detection pipeline 20, and the gas content detection element 21 detects the content of at least one gas in the sample gas; when the filter structure 11 or the sampling pipeline 10 is blocked, the detection pipeline 20 is disconnected from the filter structure 11, the outlet section of the air supply pipeline 50 is connected to the filter structure 11, and the protective gas is passed into the filter structure 11 to clear the filter structure 11 and the sampling pipeline 10, thereby solving the problem that the gas content detection system is prone to blockage. Moreover, in the present application, when the sample gas is detected, the protective gas can provide power to the jet pump 22; when the filter structure 11 or the sampling pipeline 10 is blocked, the protective gas can back-blow the filter structure 11 or the sampling pipeline 10, thereby achieving the dredging and cleaning of the filter structure 11 or the sampling pipeline. By setting up the gas supply pipeline, it is possible to provide power to the detection pipeline 20 and back-blow to dredge the blockage, thereby optimizing the layout of the gas content detection system, increasing the use of the protective gas, and reducing the cost of use.

[0052] Specifically, the gas content detection system is used to detect the oxygen content during the crushing process of lithium batteries. At this time, the gas content detection component 21 can be an oxygen content detector, and the protective gas can be nitrogen or an inert gas. In this way, when the oxygen content in the sample gas is detected, since the protective gas will not react during the crushing process of the lithium battery, nor will it affect the total amount of oxygen, the mixed gas obtained by mixing the protective gas discharged after the detection with the sample gas can be reintroduced into the pipeline 20 to be detected, thereby improving the utilization rate of the sample gas. In addition, when the filter structure 11 or the sampling pipeline 10 is blocked, backblowing the protective gas to the filter structure 11 or the sampling pipeline 10 will not interfere with the safety of the lithium battery crushing process, thereby ensuring the safety during backblowing.

[0053] Specifically, the filtering accuracy of the filtering structure 11 in this embodiment is less than 5um, so that the filtering structure can filter the dust in the sample gas. Specifically, the filtering structure 11 can be a filter.

[0054] In this embodiment, the gas content detection system further includes a first switching valve 30, which has a first communication port 31, a second communication port 32 and a third communication port 33. The first communication port 31 is connected to the filter structure 11, the second communication port 32 is connected to the detection pipeline 20, and the third communication port 33 is connected to the gas supply pipeline 50. The first switching valve 30 has a first switching state and a second switching state. When the first switching valve 30 is in the first switching state, the filter structure 11 is connected to the detection pipeline 20; when the first switching valve 30 is in the second switching state, the filter structure 11 is connected to the outlet end of the gas supply pipeline 50. In this way, when the sample gas is detected, the first switching valve 30 is switched to the first switching state, the filter structure 11 is connected to the detection pipeline 20, and the air supply pipeline 50 introduces protective gas to the drainage port of the jet pump 22, so that suction can be provided to the detection pipeline 20, so that the sample gas enters the detection pipeline 20 and circulates in the detection pipeline 20. At this time, the gas content detection component 21 can detect the content of a specific gas in the sample gas. When the pipeline is blocked, the first switching valve 30 is switched to the second switching state, the filter structure 11 is connected to the outlet end of the air supply pipeline 50, and the air supply pipeline 50 introduces protective gas to the filter structure 11 for backblowing, so that the filter structure 11 and the sampling pipeline 10 can be unblocked and cleaned. Therefore, by changing the state of the first switching valve 30, the switching of the connection relationship of each pipeline is realized, thereby ensuring the normal operation of the gas content detection system.

[0055] In this embodiment, the first switching valve 30 includes a valve body, a valve core and an operating part 34, the second communication port 32 is arranged opposite to the third communication port 33, the valve core is movably arranged in the valve body along the spacing arrangement direction of the second communication port 32 and the third communication port 33, a part of the operating part 34 is arranged outside the valve body, the other part of the operating part 34 passes through the valve body and is connected to the valve core, a part of the operating part 34 is provided with a driving flow path, and the driving flow path extends along the spacing arrangement direction of the second communication port 32 and the third communication port 33. The gas content detection system also includes a first pipeline 41 and a first solenoid valve 411, a second pipeline 42 and a second solenoid valve 421. The first solenoid valve 411 is arranged on the first pipeline 41, one end of the first pipeline 41 is used to pass fluid, and the other end of the first pipeline 41 is connected to one end of the driving flow path; the second solenoid valve 421 is arranged on the second pipeline 42, one end of the second pipeline 42 is used to pass fluid, and the other end of the second pipeline 42 is connected to the other end of the driving flow path. When the first switching valve 30 is in the first switching state, the first solenoid valve 411 is closed and the second solenoid valve 421 is opened; when the first switching valve 30 is in the second switching state, the first solenoid valve 411 is opened and the second solenoid valve 421 is closed.

[0056] With such a configuration, the first pipeline 41 and the second pipeline 42 are connected to the two ends of the driving flow path respectively. When the first solenoid valve 411 is closed and the second solenoid valve 421 is opened, the first pipeline 41 is closed to one end of the driving flow path, and the second pipeline 42 is connected to the driving flow path. The pressure on the side close to the second connecting port 32 in the driving flow path is greater than the pressure on the side close to the third connecting port 33. As a result, the fluid in the first pipeline 41 pushes the operating part 34 to move toward the side of the third connecting port 33, and the operating part 34 drives the valve core to move in the valve body, so that the valve core blocks the third connecting port 33. At this time, the first connecting port 31 and the second connecting port 32 are connected, and the first switching valve 30 is in the first switching state, and the content of the specific gas in the sample gas can be detected by the gas content detection element 21. Similarly, when the first solenoid valve 411 is opened and the second solenoid valve 421 is closed, the first switching valve 30 is in the second switching state, and the filter structure 11 and the sampling pipeline 10 can be unblocked. Therefore, the present application realizes the switching of the state of the first switching valve 30 through the first solenoid valve 411 and the second solenoid valve 421. Moreover, the switching state of the first switching valve 30 can be changed through the first solenoid valve 411 and the second solenoid valve 421, so as to switch the first switching valve 30 between the first switching state or the second switching state, thereby improving the convenience of the gas content detection system when in use.

[0057] Specifically, one end of the first pipeline 41 is connected to the gas supply pipeline 50, and one end of the second pipeline 42 is connected to the gas supply pipeline 50. In this way, the state of the first switching valve 30 can be changed by introducing the protective gas, thereby optimizing the layout of the gas content detection system, simplifying the pipeline layout of the gas content detection system, and no additional air intake branch is required to perform air intake operation on the first pipeline 41 and the second pipeline 42. In addition, the above-mentioned configuration also increases the function of the protective gas and improves the utilization rate of the protective gas.

[0058] In this embodiment, the gas content detection system further includes a switch valve 51, which is disposed on the connecting pipeline between the outlet end of the gas supply pipeline 50 and the drainage port of the jet pump 22. Thus, when the sample gas is detected, the switch valve 51 is opened, and the protective gas is introduced into the drainage port of the jet pump 22, thereby providing power for the movement of the sample gas in the detection pipeline 20; when clearing the blockage, the switch valve 51 is closed to ensure that the protective gas introduced into the filter structure 11 has sufficient power, thereby improving the efficiency and effect of clearing the blockage.

[0059] Specifically, the gas content detection system further includes a speed regulating valve 52, which is disposed on the connecting pipeline between the outlet end of the gas supply pipeline 50 and the drainage port of the jet pump 22. In this way, when the sample gas is detected, the negative pressure of the jet pump 22 can be changed by changing the flow rate of the sample gas entering the drainage port of the jet pump 22, so that the power provided by the jet pump 22 can be adjusted, thereby achieving the adjustment of the sample gas flow rate and flow rate in the detection pipeline 20.

[0060] In this embodiment, the gas content detection system also includes a water washing structure 23 and a condensation structure 24. The water washing structure 23 is arranged on the detection pipeline 20, and the water washing structure 23 is located between the filter structure 11 and the gas content detection element 21. The water washing structure 23 is used to remove the corrosive gas in the sample gas. The condensation structure 24 is arranged on the detection pipeline 20, and the condensation structure 24 is located between the water washing structure 23 and the gas content detection element 21. In this way, the corrosive gas in the sample gas can be removed by the water washing structure 23, and the sample gas can be preliminarily cooled by the water washing structure 23, so that the sample gas can be prevented from damaging the gas content detection element 21, and the corrosive gas and high temperature in the sample gas can be prevented from interfering with the detection result of the gas content detection element 21, thereby improving the service life and detection accuracy of the gas content detection element 21. Furthermore, a condensation structure 24 is provided between the water washing structure 23 and the gas content detection. On the one hand, the sample gas can be further cooled to reduce the influence of high temperature on the gas content detection element 21. On the other hand, the condensation structure 24 can condense the moisture in the sample gas to facilitate the removal of the moisture, thereby preventing the moisture from entering the gas content detection element 21 and accelerating the corrosion of the gas content detection element 21 by the sample gas.

[0061] Specifically, the condensation structure 24 may be an air-cooled cooling device, which can continuously cool the pipeline by introducing a relatively low-temperature gas to the outside of the pipeline, thereby achieving a cooling effect on the sample gas.

[0062] Specifically, the condensation structure 24 includes a cold pipe 241, a cold air pipe 242, and a condensing pipe 244. The cold air pipe 242 introduces relatively low-temperature gas into the cold pipe 241, thereby realizing a cooling process of the cold pipe 241, and the outer wall of the condensing pipe 244 with the sample gas flowing therein contacts the cold pipe 241, and the relatively low-temperature cold pipe 241 performs heat exchange with the condensing pipe 244 to cool the condensing pipe 244, thereby indirectly realizing a cooling process of the sample gas in the condensing pipe 244.

[0063] Specifically, a portion of the condenser tube 244 may be configured as a spiral structure, thereby increasing the distance that the sample gas flows in the condenser tube 244 , thereby enhancing the cooling effect on the sample gas.

[0064] Specifically, the condensation structure 24 also includes a pressure regulating valve 243, which is arranged on the cold air pipe 242. The pressure and flow rate of the gas in the cold pipe 241 are set by the pressure regulating valve 243, so as to adjust the cooling effect of the condensation structure 24.

[0065] Specifically, after being condensed by the condensation structure 24 , the temperature of the sample gas is less than 50° C. The sample gas at this temperature can significantly reduce the damage to the gas content detection element 21 caused by high temperature.

[0066] In this embodiment, the water washing structure 23 includes a primary water washing component 231, a secondary water washing component 233 and an alcohol washing component 232. Among them, the primary water washing component 231 has a first water washing inlet and a first water washing outlet, and the first water washing inlet is connected to the filter outlet of the filter structure 11; the alcohol washing component 232 has an alcohol washing inlet and an alcohol washing outlet, and the alcohol washing inlet is connected to the first water washing outlet; the secondary water washing component 233 has a second water washing inlet and a second water washing outlet, and the second water washing inlet is connected to the alcohol washing outlet, and the second water washing outlet is connected to the condensation inlet of the condensation structure 24. In this way, different corrosive gases in the sample gas can be removed by multi-stage cleaning, so that the sample gas can be prevented from damaging the gas content detection component 21, and the corrosive gas in the sample gas can be prevented from interfering with the detection result of the gas content detection component 21, thereby improving the service life and detection accuracy of the gas content detection component 21.

[0067] Specifically, the first-level water washing component 231 can remove fluoride and hydrogen substances in the sample gas and significantly cool the high-temperature sample gas. The alcohol washing component 232 can remove organic matter in the sample gas. The secondary water washing component 233 contains an alkaline aqueous solution, which can remove acidic substances in the sample gas, thereby preventing high temperature, organic matter, and acidic substances from damaging the gas content detection component 21.

[0068] In this embodiment, the gas content detection system also includes a water vapor separator 25, which is arranged on the detection pipeline 20, and the water vapor separator 25 is located between the condensation structure 24 and the gas content detection element 21. The water vapor separator 25 has a first separation port 251, a second separation port 252, and a separation cavity connected to the first separation port 251 and the second separation port 252. The first separation port 251 is located above the second separation port 252, and the first separation port 251 is connected to the gas content detection element 21, and the second separation port 252 is connected to the inlet of the jet pump 22. In this way, the water vapor carried by the sample gas from the water washing structure 23 can be removed, and the water vapor is prevented from entering the gas content detection element 21 to accelerate the corrosion of the gas content detection element 21, thereby improving the service life of the gas content detection element 21. In addition, the sample gas is diverted at the position of the water vapor separator 25, and part of the sample gas directly enters the jet pump 22 from the second separation port 252 and is discharged, thereby improving the circulation efficiency of the sample gas.

[0069] Specifically, a water-blocking filter 28 is further provided between the first separation port 251 and the gas content detection element 21 to further improve the water removal effect and ensure that water vapor can be fully separated from the sample gas, thereby further improving the service life of the gas content detection element 21 .

[0070] In this embodiment, the gas content detection system further includes a flow meter 26 and an explosion-proof control module 60. The flow meter 26 electrically connected to the explosion-proof control module 60 is disposed on the detection pipeline 20, and the flow meter 26 is located between the condensation structure 24 and the gas content detection element 21. In this way, the flow rate of the sample gas entering the gas content detection element 21 can be detected by the flow meter 26, so that the flow rate of the sample gas entering the gas content detection element 21 can be adjusted according to the flow rate detection result of the flow meter 26. Furthermore, the blockage of the sampling pipeline 10 and the filter structure 11 can also be confirmed based on the detection result of the flow meter 26. When the flow rate of the sample gas detected by the flow meter 26 is too small, it means that the sample gas may have been blocked. The detection pipeline 20 can be controlled to be disconnected from the filter structure 11, and the outlet section of the gas supply pipeline 50 is connected to the filter structure 11. The protective gas is introduced into the filter structure 11 to clear the filter structure 11 and the sampling pipeline 10. This realizes the timely adjustment of the connection relationship between the gas supply pipeline 50, the drainage port of the jet pump 22, and the detection pipeline 20, and effectively prevents the sampling pipeline 10 and the filter structure 11 from being blocked. In addition, the flow meter 26 is electrically connected to the explosion-proof control module 60, so that the explosion-proof control module 60 can control the gas content detection system according to the detection result of the flow meter 26.

[0071] Specifically, the explosion-proof control module 60 is also electrically connected to the first solenoid valve 411 and the second solenoid valve 421, so that the first solenoid valve 411 and the second solenoid valve 421 can be controlled according to the detection result of the flow meter 26 to change the switching state of the first switching valve 30, thereby realizing the control of the connection relationship between the air supply pipeline 50, the drainage port of the jet pump 22, and the detection pipeline 20 to prevent the sampling pipeline 10 and the filtering structure 11 from being blocked.

[0072] Specifically, the explosion-proof control module 60 may be an explosion-proof control box.

[0073] In this embodiment, the gas content detection system further includes a second switching valve 27, which is arranged on the detection pipeline 20. The second switching valve 27 has a first connection port 271, a second connection port 272 and a third connection port 273. The first connection port 271 is connected to the filter outlet of the filter structure 11, the second connection port 272 is connected to the gas content detection component 21, and the third connection port 273 is connected to the outside. Among them, the second switching valve 27 has a first adjustment state and a second adjustment state. When the second switching valve 27 is in the first adjustment state, the first connection port 271 is connected to the second connection port 272; when the second switching valve 27 is in the second adjustment state, the third connection port 273 is connected to the second connection port 272. In this way, when the gas content in the sample gas is detected, the first connection port 271 of the second switching valve 27 is connected to the second connection port 272, and the sample gas can flow from the position of the second switching valve 27 to the gas content detection component 21, so that the gas content in the sample gas can be detected. When the error of the gas content detection element 21 is large, the third connection port 273 of the second switching valve 27 is connected to the second connection port 272. At this time, the gas content detection element 21 is connected to the outside, and the standard gas determined by the content value of the gas to be detected is introduced into the gas content detection element 21 from the third connection port 273, and the gas content detection element 21 is adjusted to the gas content value of the standard gas, so that the calibration of the gas content detection element 21 can be achieved. Therefore, the accuracy of the detection result of the gas content detection element 21 is improved by the second switching valve 27.

[0074] Specifically, the third connection port 273 is in communication with the standard pressure gas pipeline 80 . When the third connection port 273 and the second connection port 272 are in communication, the standard pressure gas is introduced into the gas content detection element 21 through the standard pressure gas pipeline 80 .

[0075] In addition, it should be noted that the materials of the various components used in the gas content detection system can be set to corrosion-resistant and high-temperature-resistant materials, thereby increasing the service life of the gas content detection system. Furthermore, the explosion-proof level of the electrical components used in the gas content detection system is not less than ExdⅡBT4 GB, thereby ensuring the safety of the gas content detection system during use.

[0076] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: by setting up the gas supply pipeline 50, it can not only provide power to the detection pipeline 20, but also back-blow to clear the blockage, thereby optimizing the layout of the gas content detection system, increasing the use of protective gas, and reducing the cost of use.

[0077] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0080] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas content detection system, characterized in that: include: A sampling pipeline (10) and a filtering structure (11), wherein the sampling pipeline (10) is used to communicate with a pipeline (70) to be sampled, and the filtering structure (11) is provided on the sampling pipeline (10) so as to filter the sampled fluid in the sampling pipeline (10) through the filtering structure (11); a detection pipeline (20), a gas content detection element (21) and a jet pump (22), wherein the detection pipeline (20) can be selectively connected to or disconnected from the filter structure (11), and the gas content detection element (21) and the jet pump (22) are arranged on the detection pipeline (20) at intervals; An air supply pipeline (50), wherein the air inlet end of the air supply pipeline (50) is used to introduce protective gas, and the outlet end of the air supply pipeline (50) can be selectively connected to the filtering structure (11) or the jet pump (22); when the detection pipeline (20) is connected to the filtering structure (11), the outlet end of the air supply pipeline (50) is connected to the drainage port of the jet pump (22); when the detection pipeline (20) is disconnected from the filtering structure (11), the outlet end of the air supply pipeline (50) is connected to the filtering structure (11).

2. The gas content detection system according to claim 1, characterized in that: The gas content detection system also includes: a first switching valve (30), the first switching valve (30) having a first communication port (31), a second communication port (32) and a third communication port (33), the first communication port (31) being in communication with the filter structure (11), the second communication port (32) being in communication with the detection pipeline (20), and the third communication port (33) being in communication with the air supply pipeline (50); Wherein, the first switching valve (30) has a first switching state and a second switching state; when the first switching valve (30) is in the first switching state, the filter structure (11) is connected to the detection pipeline (20); when the first switching valve (30) is in the second switching state, the filter structure (11) is connected to the outlet end of the air supply pipeline (50).

3. The gas content detection system according to claim 2, characterized in that: The first switching valve (30) comprises a valve body, a valve core and an operating portion (34); the second communication port (32) and the third communication port (33) are arranged opposite to each other; the valve core is movably arranged in the valve body along the spacing arrangement direction of the second communication port (32) and the third communication port (33); a part of the operating portion (34) is arranged outside the valve body; another part of the operating portion (34) passes through the valve body and is connected to the valve core; a driving flow path is arranged on a part of the operating portion (34); the driving flow path extends along the spacing arrangement direction of the second communication port (32) and the third communication port (33); The gas content detection system also includes: A first pipeline (41) and a first solenoid valve (411), wherein the first solenoid valve (411) is arranged on the first pipeline (41), one end of the first pipeline (41) is used for passing fluid, and the other end of the first pipeline (41) is connected to one end of the driving fluid path; a second pipeline (42) and a second electromagnetic valve (421), wherein the second electromagnetic valve (421) is arranged on the second pipeline (42), one end of the second pipeline (42) is used for passing fluid, and the other end of the second pipeline (42) is connected to the other end of the driving flow path; Wherein, when the first switching valve (30) is in the first switching state, the first solenoid valve (411) is closed and the second solenoid valve (421) is opened; when the first switching valve (30) is in the second switching state, the first solenoid valve (411) is opened and the second solenoid valve (421) is closed.

4. The gas content detection system according to claim 3, characterized in that: One end of the first pipeline (41) is in communication with the air supply pipeline (50); and / or, One end of the second pipeline (42) is in communication with the air supply pipeline (50).

5. The gas content detection system according to claim 1, characterized in that: The gas content detection system also includes: a switch valve (51) disposed on the connecting pipeline between the outlet end of the air supply pipeline (50) and the drainage port of the jet pump (22); and / or, The speed regulating valve (52) is arranged on the connecting pipeline between the outlet end of the air supply pipeline (50) and the drainage port of the jet pump (22).

6. The gas content detection system according to claim 1, characterized in that: The gas content detection system also includes: a water washing structure (23), arranged on the detection pipeline (20), the water washing structure (23) being located between the filter structure (11) and the gas content detection element (21), the water washing structure (23) being used to remove corrosive gases in the sample gas; A condensation structure (24) is arranged on the detection pipeline (20), and the condensation structure (24) is located between the water washing structure (23) and the gas content detection element (21).

7. The gas content detection system according to claim 6, characterized in that: The water washing structure (23) comprises: A primary water washing component (231), the primary water washing component (231) having a first water washing inlet and a first water washing outlet, the first water washing inlet being in communication with the filtering outlet of the filtering structure (11); An alcohol washing component (232), the alcohol washing component (232) having an alcohol washing inlet and an alcohol washing outlet, the alcohol washing inlet being in communication with the first water washing outlet; A secondary water washing component (233), wherein the secondary water washing component (233) has a second water washing inlet and a second water washing outlet, wherein the second water washing inlet is connected to the alcohol washing outlet, and the second water washing outlet is connected to the condensation inlet of the condensation structure (24).

8. The gas content detection system according to claim 6, characterized in that: The gas content detection system also includes: A water vapor separator (25) is arranged on the detection pipeline (20), and the water vapor separator (25) is located between the condensation structure (24) and the gas content detection element (21). The water vapor separator (25) has a first separation port (251), a second separation port (252), and a separation cavity connected to both the first separation port (251) and the second separation port (252). The first separation port (251) is located above the second separation port (252), the first separation port (251) is connected to the gas content detection element (21), and the second separation port (252) is connected to the inlet of the jet pump (22).

9. The gas content detection system according to claim 6, characterized in that: The gas content detection system also includes: a flow meter (26), the flow meter (26) being arranged on the detection pipeline (20), the flow meter (26) being located between the condensation structure (24) and the gas content detection element (21); An explosion-proof control module (60) is electrically connected to the flow meter (26).

10. The gas content detection system according to claim 1, characterized in that: The gas content detection system also includes: a second switching valve (27), arranged on the detection pipeline (20), the second switching valve (27) having a first connection port (271), a second connection port (272) and a third connection port (273), the first connection port (271) being in communication with the filter outlet of the filter structure (11), the second connection port (272) being in communication with the gas content detection element (21), and the third connection port (273) being in communication with the outside; Wherein, the second switching valve (27) has a first regulating state and a second regulating state; when the second switching valve (27) is in the first regulating state, the first connecting port (271) is connected to the second connecting port (272); when the second switching valve (27) is in the second regulating state, the third connecting port (273) is connected to the second connecting port (272).

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