High-temperature-resistant gas detection device

Abstract

The utility model discloses a high-temperature-resistant gas detection device, which relates to the field of high-temperature gas detection, and comprises a shell, a sampling tube and an optical absorption detection unit, and the sampling tube is arranged outside the shell; the optical absorption detection unit comprises a gas chamber, a light source, a detector and two window assemblies, the gas chamber is arranged outside the shell, extends in the first direction and is communicated with the sampling pipe, the light source, the detector and the two window assemblies are arranged in the shell, the two window assemblies are arranged at the two ends of the gas chamber, and each window assembly comprises a window piece and a gas isolation piece; the window piece is arranged at the end of the gas chamber, a heat insulation buffering gap is formed between the window piece and the end of the gas chamber, the gas isolation pieces are arranged on the periphery of the window piece, receding holes are formed in the positions corresponding to the end of the gas chamber, the gas isolation pieces are made of high-temperature-resistant low-heat-conduction materials, and the light source is arranged on the side, away from the end of the gas chamber, of one of the two gas isolation pieces. The detector is arranged on one side, far away from the end part of the gas chamber, of the other one of the two gas separators; the real-time detection precision is high, the response is fast, and the service life is long.

Description

TECHNICAL FIELD

[0001] The utility model relates to high temperature gas detection technical field, concretely relates to a kind of gas detection device of high temperature resistance. BACKGROUND

[0002] With the rapid development of China's economy and the acceleration of industrial process, high temperature gas detection is more and more widely used in industrial process, environmental monitoring and other fields.

[0003] In the industrial production process, the gas under high temperature environment needs to be measured to ensure the stability and safety of production process. For example, the precursor concentration monitoring of gas phase delivery system in semiconductor process, high temperature NMP (N-methyl pyrrolidone) volatile gas monitoring of lithium battery coating process, etc. High temperature gas measurement technology is used to detect the composition and concentration of gas in industrial process, which can realize the control of process.

[0004] In the field of environmental monitoring, the discharged waste gas, organic matter and other chemical substances need to be monitored to ensure that the discharge meets the national standards, so as to control the influence on the environment and human health within a reasonable range, such as methane, carbon dioxide and other greenhouse monitoring. Using high temperature gas measurement technology can directly obtain the emission data, reduce the system conversion time, provide accurate data support, and facilitate the control of emission parameters under high temperature environment, which provides protection for the production and environmental protection of the industry.

[0005] The current high temperature gas detection device mainly uses gas chromatography, catalytic combustion and optical absorption principle to detect, such as patent CN104535689B discloses a gas chromatography detection method to detect high temperature gas, although the detection precision is high, but the operation is complex, the cost is high, and it is difficult to realize real-time online detection. In order to change this situation, Japanese Riken's patent JP5368291B2 and Shenzhen Moeye Science and Technology's patent CN111044686A disclose a high temperature gas detection device based on catalytic combustion principle, which directly measures the gas by placing the gas detection part at the front end of the sampling probe, and at the same time, the device is designed with isolation and explosion-proof structure to ensure the safety of the detection process. However, the catalytic detection device has the disadvantages of poor selectivity, short service life, need for regular maintenance and insufficient detection accuracy in oxygen-deficient or non-oxygen-rich environment; compared with this, the gas measurement technology based on optical absorption principle uses the characteristics of radiation light to measure the absorption of gas molecules, which can realize real-time, accurate, non-contact and non-destructive measurement, not only avoids pollution and other problems, but also ensures the accuracy and stability of measurement data, and can quickly and accurately respond to various concentration signals. But in high temperature scene, its service life and performance are more likely to cause device failure or performance decline than normal temperature application. UTILITY MODEL CONTENT

[0006] The utility model discloses a main purpose is to propose a kind of high-temperature-resistant gas detection device with high measurement accuracy and stability, and not affected by high temperature.

[0007] To achieve the above object, the utility model provides a kind of high-temperature-resistant gas detection device, the high-temperature-resistant gas detection device includes:

[0008] Shell body;

[0009] Sampling tube, be located in the shell body, for the high-temperature gas to be measured to go in and out;And,

[0010] Optical absorption detection unit includes gas chamber, light source, detector and two window components, the gas chamber is located in the shell body, and along the first direction extension arrangement, with the sampling tube is communicated, the light source, the detector and two the window component is located in the shell body, two the window component is located in the both ends of the gas chamber, each the window component includes a window sheet and a gas isolation piece, the window sheet is located in the end of the gas chamber, and with the heat insulation buffer gap between the end of the gas chamber, the gas isolation piece is located in the outer periphery of the window sheet, and the end of the gas chamber is opened to correspond the gas chamber and is set to avoid hole, the material of the gas isolation piece includes high-temperature-resistant low-heat-conducting material, the light source is located in one of two the gas isolation piece and is away from the end of the gas chamber one side, for emitting light beam to the gas chamber, the detector is located in another of two the gas isolation piece and is away from the end of the gas chamber one side, for receiving the light beam after the light signal of the high-temperature gas to be measured is absorbed.

[0011] Optionally, the shell body is explosion-proof shell body, and the shell body material is high-heat-dissipation aluminum alloy material;And / or,

[0012] Each the window component also includes heating sheet, and the heating sheet is located between the gas isolation piece and the window sheet.

[0013] Optionally, each the gas isolation piece includes window fixed seat and window gland that can be detachably connected in sequence along the first direction, the window fixed seat is sleeved on the outer periphery of the gas chamber and the window sheet, and is fixedly connected with the shell body;

[0014] The window gland is prepared using PEEK material, and the window fixed seat is prepared using PEEK material or stainless steel material.

[0015] Optionally, each the gas isolation piece also includes a heat insulation buffer piece, the heat insulation buffer piece is located in the buffer gap, and is sleeved on the outer periphery of the gas chamber and the inner periphery of the window fixed seat, and the heat insulation buffer piece is prepared using PEEK material.

[0016] Optionally, the bottom wall of the shell body is concave in the middle and forms a containing groove and two convex parts on both sides of the containing groove.

[0017] The gas chamber is arranged in the accommodating groove, the light source and one of the window assemblies are arranged in one of the two convex portions, and the detector and the other of the window assemblies are arranged in the other of the two convex portions;

[0018] The sampling pipe is arranged to extend along a second direction, and one end of the sampling pipe is inserted into the gas chamber and communicates with the gas chamber, and the sampling pipe is provided with an inlet and an outlet for the high-temperature gas to be measured to enter and exit the gas chamber;

[0019] The second direction is perpendicular to the first direction in a plane.

[0020] Optionally, a first gas inlet and a first gas outlet are arranged on a side wall of the gas chamber facing the sampling pipe.

[0021] The sampling pipe comprises:

[0022] a pipe body arranged to extend along the second direction, and a gas passage is arranged on a first end of the pipe body close to the gas chamber to communicate with the gas chamber, and a second end of the pipe body away from the gas chamber is arranged to be sealed; and

[0023] a partition plate arranged in the pipe body and arranged to extend along the second direction to form an air inlet channel and an air outlet channel in the pipe body, and divide the gas passage into a second gas inlet corresponding to the air inlet channel and a second gas outlet corresponding to the air outlet channel, a third gas inlet is arranged on a circumferential side wall of an end of the air inlet channel away from the gas chamber, so that the high-temperature gas to be measured flows into the gas chamber through the third gas inlet, the second gas inlet and the first gas inlet in sequence, and a third gas outlet is arranged on a circumferential side wall of an end of the air outlet channel away from the gas chamber, so that the high-temperature gas to be measured in the gas chamber flows out of the pipe body through the first gas outlet, the second gas outlet and the third gas outlet in sequence.

[0024] Optionally, the high-temperature gas detection device further comprises a guide adapter inserted into the first end of the pipe body, the guide adapter has a first channel and a second channel both arranged to extend through the first direction, the second gas inlet communicates with the gas chamber through the first channel, and the second gas outlet communicates with the gas chamber through the second channel.

[0025] The cross-sectional area of the first channel is smaller than the cross-sectional area of the second gas inlet, and the cross-sectional area of the second channel is smaller than the cross-sectional area of the second gas outlet.

[0026] Optionally, the high-temperature gas detection device further comprises a three-way fixing seat arranged in the accommodating groove and fixedly connected with the shell.

[0027] The gas chamber is sleeved in the tee fixed seat.

[0028] Optionally, the high-temperature-resistant gas detection device further comprises an adapter fixed head, the adapter fixed head is sleeved in the tee fixed seat, and the adapter fixed head has a first fixed end and a second fixed end in the second direction.

[0029] The first fixed end is provided with a containing cavity penetrating in the first direction, and is used for containing the gas chamber.

[0030] The second fixed end is sleeved on the outer periphery of the first end of the pipe body and is fixedly connected with the pipe body.

[0031] Optionally, each gas isolation piece comprises a window fixed seat and a window gland which are detachably connected in sequence in the first direction.

[0032] The window fixed seat and the window gland are respectively provided with the avoiding holes corresponding to the end of the gas chamber.

[0033] Optionally, the high-temperature-resistant gas detection device further comprises a display control unit, the display control unit is arranged in the shell and comprises a display screen and a controller.

[0034] The shell is provided with a mounting hole corresponding to one side wall of the display screen, and a transparent plate is mounted at the mounting hole.

[0035] In the technical scheme, the high-temperature gas to be detected flows into the gas chamber through the sampling pipe, the light source emits a light beam into the gas chamber, the light beam is received by the detector after being absorbed by the high-temperature gas to be detected, the concentration of the high-temperature gas to be detected is obtained, and the concentration detection of the high-temperature gas to be detected is completed. The high-temperature-resistant gas detection device provided by the utility model adopts the optical absorption principle for detection, has high real-time detection precision, fast response and is maintenance-free. The window sheet is wrapped by the gas isolation piece made of high-temperature-resistant and low-thermal-conductivity material, not only plays a supporting role, but also isolates the light source, the detector and other key components from the high-temperature gas to be detected, so that the heat of the high-temperature gas to be detected reaches the light source or the detector through the gas isolation piece, the window sheet and the hollow area between the light source and the detector in sequence. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0037] Figure 1 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0038] Figure 2 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure. Figure 1 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0039] Figure 3 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure. Figure 1 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0040] Figure 4 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure. Figure 1 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0041] Figure 5 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure. Figure 1 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0042] Figure 6 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure. Figure 5 A cross-sectional view of an embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0043] Figure 7 A cross-sectional view of another embodiment of the high-temperature-resistant gas detection device provided by the present application is shown in the figure.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045]

[0046]

[0047] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0049] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0050] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0051] The following will be described taking the flammable and explosive high-temperature NMP gas in the lithium battery coating process as an example. NMP is a non-protic solvent with extremely strong solubility, and is widely used in the lithium battery, medicine, pesticide, electronic, petroleum chemical industry and other industries. Especially in the lithium battery industry, NMP solvent plays a role in mixing active material, conductive agent and adhesive in the pulping process of lithium battery, and in the coating process, most of the NMP solvent will be heated to become gaseous and volatilize. However, the volatilized NMP gas is toxic and can enter the human body through the skin and respiratory tract, etc. When the NMP concentration in the air reaches 100-200 ppm, it has a stimulating effect on the skin, eyes and respiratory tract of the human body, causing headache, nausea and other symptoms. Long-term contact with high-concentration NMP gas can cause central nervous system dysfunction and even death. In addition, NMP gas mixed with air can also have the possibility of explosion. Therefore, it is necessary to detect NMP gas in time and effectively. In the lithium battery production process, NMP volatile gas detection is in a high-temperature environment of 110-150 DEG C, which will affect the service life and performance of the NMP gas detection device.

[0052] In view of this, the utility model provides a kind of high-temperature-resistant gas detection device 100 to detect flammable and explosive high-temperature NMP gas, Figures 1 to 6 To provide the high-temperature-resistant gas detection device 100 embodiment of the utility model.

[0053] Please refer to Figures 1 to 6 The high-temperature-resistant gas detection device 100 includes shell 1, sampling pipe 2 and optical absorption detection unit 3, the sampling pipe 2 is arranged outside the shell 1, for the high-temperature gas to be measured to enter and exit;The optical absorption detection unit 3 includes gas chamber 31, light source 32, detector 33 and two window components 34, the gas chamber 31 is arranged outside the shell 1, and is arranged along the first direction, and is communicated with the sampling pipe 2, the light source 32, the detector 33 and two window components 34 are arranged in the shell 1, two window components 34 are arranged at both ends of the gas chamber 31, each window component 34 includes a window sheet 341 and a gas isolation piece 342, the window sheet 341 is arranged at the end of the gas chamber 31, and a heat insulation buffer gap is arranged between the window sheet 341 and the end of the gas chamber 31, the gas isolation piece 342 is arranged on the periphery of the window sheet 341, and a relief hole is formed corresponding to the end of the gas chamber 31, the material of the gas isolation piece 342 includes high-temperature-resistant low-thermal-conductivity material, the light source 32 is arranged on one side of one of the two gas isolation pieces 342 away from the end of the gas chamber 31, for emitting light beam into the gas chamber 31, the detector 33 is arranged on the other side of the other gas isolation piece 342 away from the end of the gas chamber 31, for receiving the light signal emitted by the light beam after being absorbed by the high-temperature gas to be measured.

[0054] In the technical scheme of the utility model, the high-temperature gas to be measured (NMP gas) flows into the gas chamber 31 through the sampling pipe 2, the light source 32 emits light beam into the gas chamber 31, the light beam is received by the detector 33 after being absorbed by the high-temperature gas to be measured, the concentration of the high-temperature gas to be measured is obtained, and the concentration detection of the high-temperature gas to be measured is completed, the high-temperature-resistant gas detection device 100 provided by the utility model detects by using optical absorption principle, and has high real-time detection precision, fast response and maintenance-free;Since the temperature of the high-temperature gas to be measured is usually as high as 150 DEG C or above, it has a great influence on the optical absorption detection unit 3, therefore, the gas isolation piece 342 made of high-temperature-resistant low-thermal-conductivity material is wrapped around the window sheet 341, not only plays a supporting role, but also isolates the light source 32, the detector 33 and other key components from the high-temperature gas to be measured, so that the heat of the high-temperature gas to be measured reaches the light source 32 or the detector 33 through the gas isolation piece 342, the hollow area between the window sheet 341 and the light source 32 or the detector 33 in turn.

[0055] It should be noted that the light source 32 is a non-spectroscopic infrared light source or a laser light source, and based on cost considerations, the embodiment preferably is a non-spectroscopic infrared light source.

[0056] It should also be noted that the sampling tube 2 and the gas chamber 31 are non-electronic devices that will not cause an explosion, and thus are provided outside the shell 1.

[0057] In addition, it should be noted that the gas isolation member 342 avoids hindering the detector 33 from receiving the light signal emitted by the light beam after being absorbed by the high-temperature gas to be measured by being provided with the avoiding hole. The material of the gas isolation member 342 is a high-temperature-resistant and low-thermal-conductivity material, such as PEEK (polyether ether ketone) material, which has excellent comprehensive properties such as high-temperature resistance, self-lubricity, corrosion resistance, flame resistance, hydrolysis resistance, wear resistance, and fatigue resistance.

[0058] Further, in an embodiment of the utility model, the window sheet 341 is a sapphire window sheet 341.

[0059] Further, since the NMP gas has the characteristics of being flammable and explosive, the shell is an explosion-proof shell, and the shell material is a high-heat-dissipation aluminum alloy material. In this way, when an explosive environment occurs inside the shell 1, the explosion caused by electronic devices can be prevented from being transmitted to the outside of the shell 1, thereby improving the use safety of the high-temperature-resistant gas detection device 100. At the same time, the shell 1 is made of a high-heat-dissipation aluminum alloy material, which can maximize the dissipation of heat conducted to the gas isolation member 342 to the environment, and finally lower the temperature at the light source 32 or the detector 33 to 60°C, thereby ensuring the detection accuracy and service life of the optical absorption detection unit 3.

[0060] Specifically, please refer to Figure 1 , Figure 3 and Figure 4 , each of the window assemblies 34 further comprises a heating sheet 35 provided between the gas isolation member 342 and the window sheet 341. In this way, the temperature of the window sheet 341 is raised by heating through the heating sheet 35, so that the NMP vapor is prevented from condensing on the window sheet 341, thereby affecting the accuracy of the detection result of the high-temperature gas to be measured.

[0061] It should be noted that in the utility model, the above two technical features can be set alternatively or simultaneously, and specifically, in an embodiment of the utility model, the above two technical features are set simultaneously, that is, the shell is an explosion-proof shell, and the shell material is a high-heat-dissipation aluminum alloy material, and each of the window assemblies 34 further comprises a heating sheet 35 provided between the gas isolation member 342 and the window sheet 341.

[0062] Specifically, please refer to Figure 1 、 Figure 3 and Figure 4 In an embodiment of the present application, each of the gas isolation members 342 comprises a window fixing seat 3421 and a window gland 3422 which are detachably connected in sequence along the first direction, the window fixing seat 3421 is sleeved on the outer periphery of the air chamber 31 and the window sheet 341, and is fixedly connected with the shell 1; the window gland 3422 is made of PEEK material, and the window fixing seat 3421 is made of PEEK material or stainless steel material. In this way, the window sheet 341 is conveniently disassembled and installed, and when the window fixing seat 3421 is made of stainless steel material, not only has the performance of high temperature resistance and low thermal conductivity, but also better meets the explosion-proof requirements of the gas detection device.

[0063] It should be noted that in the present application, the connection mode of the window fixing seat 3421 and the window gland 3422 is not limited, and more specifically, in an embodiment of the present application, the window fixing seat 3421 and the window gland 3422 are first bonded with high temperature resistant epoxy resin, and then locked and fixed with screws.

[0064] Of course, in the present application, the connection mode of the window fixing seat 3421 and the shell 1, the window sheet 341 is not limited, and specifically, in an embodiment of the present application, the window fixing seat 3421 and the shell 1 are first bonded with high temperature resistant epoxy resin, and then locked and fixed with hexagonal studs, and the window fixing seat 3421 and the window sheet 341 are first bonded with high temperature resistant epoxy resin, and then locked and fixed with screws.

[0065] Further, please refer to Figure 7 In another embodiment of the present application, each of the gas isolation members 342 further comprises a heat insulation buffer member 3423, the heat insulation buffer member 3423 is arranged in the buffer gap and is sleeved on the outer periphery of the air chamber 31 and the inner periphery of the window fixing seat 3421; the heat insulation buffer member 3423 and the window gland 3422 are respectively made of PEEK material, and the window fixing seat 3421 is made of PEEK material and stainless steel material.

[0066] Thus, the heat conduction path of the heat of the high-temperature gas to be measured is divided into two paths: one of which is that the heat sequentially passes through the window fixed seat 3421, the window sheet 341, the window gland 3422, and then reaches the light source 32 or the detector 33; and the other of which is that the heat sequentially passes through the window fixed seat 3421, the heat insulation buffer 3423, the window sheet 341, and the window gland 3422, and then reaches the light source 32 or the detector 33.

[0067] Further, a gap is arranged between the fixed seat 3421 and the window sheet 341.

[0068] Specifically, referring to Figure 4 , the middle part of the bottom wall of the shell 1 is concave to form a receiving groove 11 and two protrusions 12 arranged on both sides of the receiving groove 11; the air chamber 31 is arranged in the receiving groove 11, the light source 32 and one window assembly 34 are arranged in one of the two protrusions 12, and the detector 33 and the other window assembly 34 are arranged in the other of the two protrusions 12; the sampling tube 2 is arranged in the second direction and one end thereof is inserted into the air chamber 31 and communicates with the air chamber 31; the sampling tube 2 is provided with an inlet and an outlet for the high-temperature gas to be measured to enter and exit the air chamber 31; and the second direction is perpendicular to the first direction in the plane.

[0069] Further, referring to Figures 1 to 3 , one side wall of the air chamber 31 facing the sampling tube 2 is provided with a first gas inlet 311 and a first gas outlet 312; the sampling tube 2 comprises a tube body 21 and a partition plate 22; the tube body 21 is arranged in the second direction and a first end thereof close to the air chamber 31 is provided with a gas passage to communicate with the air chamber 31; a second end of the tube body 21 away from the air chamber 31 is sealed; the partition plate 22 is arranged in the tube body 21 and extends in the second direction to form an air inlet channel 211 and an air outlet channel 212 in the tube body 21, and divide the gas passage into a second gas inlet corresponding to the air inlet channel 211 and a second gas outlet corresponding to the air outlet channel 212; a third gas inlet is arranged on the circumferential side wall of one end of the air inlet channel 211 away from the air chamber 31, so that the high-temperature gas to be measured sequentially flows into the air chamber 31 through the third gas inlet, the second gas inlet, and the first gas inlet 311; and a third gas outlet is arranged on the circumferential side wall of one end of the air outlet channel 212 away from the air chamber 31, so that the high-temperature gas to be measured in the air chamber 31 sequentially flows out of the tube body 21 through the first gas outlet 312, the second gas outlet, and the third gas outlet.

[0070] Thus, the pressure difference generated by the flow of the high-temperature gas to be detected in the external detection environment of the high-temperature gas detection device 100 is utilized, so that the high-temperature gas to be detected automatically enters the sampling tube 2 and the gas chamber 31 in turn, without the need for high-temperature pump suction sampling, and the adverse effects of the high-temperature gas to be detected on the optical absorption detection unit 3 are reduced.

[0071] It should be noted that in an embodiment of the present application, the high-temperature gas detection device 100 is located in an oven of a lithium battery positive plate for detecting the concentration of high-temperature gas.

[0072] It should be further noted that when the high-temperature gas detection device 100 is installed, the third gas inlet is directly opposite the airflow direction.

[0073] More specifically, the outer periphery of the second gas inlet and the outer periphery of the second gas outlet are each provided with a sealing ring to improve the air tightness and prevent gas leakage.

[0074] Further, referring to Figure 1 and Figure 2 , the high-temperature gas detection device 100 further comprises a guide adapter 4 inserted into the first end of the tube body 21, the guide adapter 4 has a first channel and a second channel both penetratingly arranged along the first direction, the second gas inlet is in communication with the gas chamber 31 through the first channel, and the second gas outlet is in communication with the gas chamber 31 through the second channel; the cross-sectional area of the first channel is smaller than that of the second gas inlet, and the cross-sectional area of the second channel is smaller than that of the second gas outlet. Thus, when the high-temperature gas to be detected flows, the cross-sectional area of the gas path changes, which can reduce the airflow resistance and facilitate the rapid flow of the high-temperature gas to be detected.

[0075] Specifically, referring to Figure 1 and Figure 2 , the high-temperature gas detection device 100 further comprises a three-way fixing seat 5, the three-way fixing seat 5 is arranged in the accommodating groove 11 and is fixedly connected with the shell 1; and the gas chamber 31 is sleeved in the three-way fixing seat 5. Thus, the three-way fixing seat 5 realizes the fixed connection between the gas chamber 31 and the shell 1.

[0076] It should be noted that in the present application, the connection mode of the three-way fixing seat 5 and the shell 1 is not limited, and can be adhesive bonding, threaded connection, etc. Specifically, in an embodiment of the present application, the three-way fixing seat 5 and the shell 1 are fixedly connected by screws.

[0077] Further, referring to Figure 1 and Figure 2The high-temperature-resistant gas detection device 100 further comprises an adapter fixing head 6, the adapter fixing head 6 is sleeved in the three-way fixing seat 5, and the adapter fixing head 6 has a first fixed end 61 and a second fixed end 62 in the second direction; the first fixed end 61 has a containing cavity penetratingly arranged along the first direction, used for containing the gas chamber 31, and the first fixed end 61 is fixedly connected with the three-way fixing seat 5; the second fixed end 62 is sleeved on the outer periphery of the first end of the pipe body 21 and is fixedly connected with the pipe body 21, and the second fixed end 62 has a third channel and a fourth channel, both of which penetratingly arranged along the second direction and both of which are in communication with the containing cavity, so that the first gas inlet 311 and the second gas inlet are communicated through the third channel, and the first gas outlet 312 and the second gas outlet are communicated through the fourth channel.

[0078] In this way, the adapter fixing head 6 realizes the fixed connection of the gas chamber 31 with the three-way fixing seat 5 and the fixed connection of the sampling pipe 2 with the gas chamber 31, and realizes the sealing of the gas path.

[0079] It should be noted that, in the utility model, the connection mode of the adapter fixing head 6 with the three-way fixing seat 5 and the sampling pipe 2 is not limited, and can be bonding, threaded connection and the like. Specifically, in an embodiment of the utility model, the adapter fixing head 6, the three-way fixing seat 5 and the sampling pipe 2 are all fixedly connected by screws.

[0080] Specifically, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , the outer periphery of the sampling pipe 2 is provided with a flange 7. In this way, the high-temperature-resistant gas detection device 100 can be fixedly installed through the flange 7. More specifically, in an embodiment of the utility model, the high-temperature gas detection device to be measured is connected with the oven inner air duct flange 7 of the lithium battery positive plate through the flange 7.

[0081] Specifically, please refer to Figure 1 , Figure 4 and Figure 5 , the high-temperature-resistant gas detection device 100 further comprises a display control unit, the display control unit is arranged in the shell 1 and comprises a display screen 8 and a controller, the controller is electrically connected with the display screen 8 and the detector 33; the shell 1 is provided with a mounting hole on one side wall corresponding to the display screen 8, and a transparent plate is mounted at the mounting hole. In this way, the detection result of the detector 33 is transmitted to the controller to obtain a concentration signal and is transmitted to the display screen 8 for display, which is convenient for workers to check.

[0082] Further, the high-temperature-resistant gas detection device 100 further comprises an alarm unit, and the controller is electrically connected with the alarm unit to control the working state of the alarm unit.

[0083] Further, the alarm unit comprises a buzzer and / or an alarm lamp.

[0084] The above merely describes preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made under the utility model concept of the utility model, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A high-temperature resistant gas detection device, characterized in that, The high-temperature resistant gas detection device includes: case; A sampling tube, disposed outside the housing, is used for the entry and exit of the high-temperature gas to be measured; and, An optical absorption detection unit includes a gas chamber, a light source, a detector, and two window assemblies. The gas chamber is located outside the housing and extends along a first direction, communicating with the sampling tube. The light source, the detector, and the two window assemblies are located inside the housing. The two window assemblies are located at both ends of the gas chamber. Each window assembly includes a window pane and a gas isolation element. The window pane is located at one end of the gas chamber and has a heat-insulating buffer gap between it and the end of the gas chamber. The gas isolation element is located on the outer periphery of the window pane and has a clearance hole corresponding to the end of the gas chamber. The gas isolation element is made of a high-temperature resistant and low-thermal-conductivity material. The light source is located on one of the two gas isolation elements on the side away from the end of the gas chamber and is used to emit a light beam into the gas chamber. The detector is located on the other of the two gas isolation elements on the side away from the end of the gas chamber and is used to receive the light signal emitted after the light beam is absorbed by the high-temperature gas to be measured.

2. The high-temperature resistant gas detection device as described in claim 1, characterized in that, The housing is an explosion-proof housing, and the housing material is a high-heat-dissipation aluminum alloy; and / or, Each of the window assemblies further includes a heating element disposed between the gas isolation element and the window sheet.

3. The high-temperature resistant gas detection device as described in claim 1, characterized in that, Each of the gas isolation components includes a window fixing seat and a window cover that are detachably connected in sequence along the first direction. The window fixing seat is sleeved on the outer periphery of the gas chamber and the window piece and is fixedly connected to the housing. The window cover is made of PEEK material, and the window fixing base is made of PEEK material or stainless steel material.

4. The high-temperature resistant gas detection device as described in claim 3, characterized in that, Each of the gas isolation components further includes a heat insulation buffer component, which is disposed in the buffer gap and sleeved on the outer periphery of the gas chamber and the inner periphery of the window fixing seat. The heat insulation buffer component is made of PEEK material.

5. The high-temperature resistant gas detection device as described in claim 1 or 2, characterized in that, The bottom wall of the housing is recessed in the middle to form a receiving groove and two protrusions on both sides of the receiving groove; The air chamber is disposed in the receiving groove, the light source and one of the window components are disposed in one of the two protrusions, and the detector and the other of the window components are disposed in the other of the two protrusions; The sampling tube extends along the second direction, and one end of it is inserted into the gas chamber and communicates with the gas chamber. The sampling tube has an inlet and an outlet for the high-temperature gas to be tested to enter and exit the gas chamber. Wherein, the second direction is perpendicular to the first direction in the plane.

6. The high-temperature resistant gas detection device as described in claim 5, characterized in that, The air chamber has a first air inlet and a first air outlet on one side wall facing the sampling tube; The sampling tube includes: A tube body extends along the second direction, and a vent is provided at its first end near the air chamber to communicate with the air chamber; the second end of the tube body away from the air chamber is sealed; and... A partition plate is disposed within the tube body and extends along the second direction to form an air inlet channel and an air outlet channel within the tube body. The air inlet is divided into a second air inlet corresponding to the air inlet channel and a second air outlet corresponding to the air outlet channel. A third air inlet is provided on the peripheral wall of the end of the air inlet channel away from the air chamber, so that the high-temperature gas to be tested flows into the air chamber sequentially through the third air inlet, the second air inlet, and the first air inlet. A third air outlet is provided on the peripheral wall of the end of the air outlet channel away from the air chamber, so that the high-temperature gas to be tested in the air chamber flows out of the tube body sequentially through the first air outlet, the second air outlet, and the third air outlet.

7. The high-temperature resistant gas detection device as described in claim 6, characterized in that, The high-temperature resistant gas detection device further includes a guide adapter inserted into the first end of the tube body. The guide adapter has a first channel and a second channel that are both arranged through the first direction. The second air inlet is connected to the gas chamber through the first channel, and the second air outlet is connected to the gas chamber through the second channel. The cross-sectional area of ​​the first channel is smaller than the cross-sectional area of ​​the second air inlet, and the cross-sectional area of ​​the second channel is smaller than the cross-sectional area of ​​the second air outlet.

8. The high-temperature resistant gas detection device as described in claim 6, characterized in that, The high-temperature resistant gas detection device also includes a three-way fixing seat, which is disposed in the receiving groove and fixedly connected to the housing; The air chamber is fitted inside the three-way fixing seat.

9. The high-temperature resistant gas detection device as described in claim 8, characterized in that, The high-temperature resistant gas detection device also includes an adapter fixing head, which is sleeved inside the three-way fixing seat, and the adapter fixing head has a first fixing end and a second fixing end in the second direction; The first fixed end has a receiving cavity that extends through the first direction for receiving the air chamber, and the first fixed end is fixedly connected to the three-way fixed seat; The second fixed end is sleeved on the outer periphery of the first end of the tube body and is fixedly connected to the tube body. The second fixed end has a third channel and a fourth channel that are both arranged through the second direction and are both connected to the accommodating cavity, so that the first air inlet and the second air inlet are connected through the third channel, and the first air outlet and the second air outlet are connected through the fourth channel.

10. The high-temperature resistant gas detection device as described in claim 1, characterized in that, The high-temperature resistant gas detection device also includes a display control unit, which is located inside the housing and includes a display screen and a controller. The controller is electrically connected to the display screen and the detector. The housing has a mounting hole on one side wall corresponding to the display screen, and a transparent plate is installed at the mounting hole.

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