Chemical plant exhaust gas detection device
By using the sliding air plug and extrusion plate drive structure in the gas collection pipe, the problems of stratified flow and inconvenient cleaning of exhaust gas in chemical plant exhaust gas detection devices are solved, achieving accurate detection and improved portability.
Patent Information
- Application Number
- CN202511496028.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-02-06
AI Technical Summary
In existing chemical plant exhaust gas detection devices, the gas transport structure causes the exhaust gas to flow in layers, resulting in inaccurate detection. Furthermore, the lack of an effective cleaning structure affects portability.
An air plug is embedded inside the gas collecting pipe. The sliding of the air plug enables the switching between negative and high pressure states. Combined with the extrusion plate and drive structure, it achieves uniform delivery of waste gas and agitation of cleaning liquid, cleaning aerosols and avoiding stratified flow.
It achieves accurate detection of exhaust gas, reduces the impact of aerosols on detection, improves the portability and detection accuracy of the device, and simplifies the maintenance frequency.
Smart Images
Figure CN121476523A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of waste gas detection, and specifically discloses a waste gas detection device for chemical plants. BACKGROUND
[0002] With the increasing attention to air pollution, the waste gas of a chemical plant needs to be treated before being discharged, and only the treated waste gas can be discharged into the air. In order to ensure that the waste gas meets the requirements, the waste gas discharged by the chemical plant needs to be detected by a staff member, and thus a waste gas detection device needs to be used. The detection device for the waste gas of a chemical plant currently comprises a gas detection structure and a gas conveying structure. In actual use, the gas conveying structure can drive the waste gas discharged by the chemical plant to be conveyed to the detection end of the gas detection structure, so that the gas detection structure can accurately detect the waste gas discharged by the chemical plant. However, the detection device can indeed achieve good detection effect on the waste gas discharged by the chemical plant, but it still has some deficiencies in actual use, for example: The gas conveying structure in the existing waste gas detection device is usually composed of an air inlet channel and a gas pump, and the detection end of the detection structure is installed on the air inlet channel. When the waste gas discharged by the chemical plant enters the inside of the air inlet channel, the waste gas in the air inlet channel will flow in a stratified manner, which causes the waste gas in the air inlet channel to be in non-uniform contact with the detection end of the detection structure, resulting in inaccurate detection of the waste gas discharged by the chemical plant. In addition, the air inlet channel of the detection device is not provided with a good cleaning structure. When the waste gas enters the inside of the air inlet channel, the gas solute in the waste gas will be in contact with the inner wall of the air inlet channel, which causes the staff member to need to frequently maintain the air inlet channel, thereby causing the waste gas detection device to have poor portability. SUMMARY
[0003] Therefore, the application aims to provide a waste gas detection device for a chemical plant to solve the above problems.
[0004] To achieve the above purpose, the application provides a waste gas detection device for a chemical plant, which comprises a shell structure and a gas detector connected to the shell structure, the inside of the shell structure is embedded with a gas collecting pipe, the upper end of the gas collecting pipe is a spherical structure, an air outlet pipe and an air inlet pipe are fixed on the spherical structure of the gas collecting pipe, a one-way valve is fixed at the connection part of the air outlet pipe and the air inlet pipe with the gas collecting pipe, and a gas plug is slidably arranged in the lower part of the inner cavity of the gas collecting pipe. The top surface of the gas plug is a smooth spherical structure, the gas plug is used to seal the lower end of the gas collecting pipe, and the waste gas conveyed into the inside of the gas collecting pipe by the air inlet pipe enters the inside of the air outlet pipe. The top surface of the air plug is provided with extrusion pieces in a lattice distribution, and the air plug is provided with a driving structure for driving the extrusion pieces.
[0005] In the above technical solution, further, the air plug is a hollow hemispherical structure, the edge of the lower part of the air plug is fixed with a sealing ring, the sealing ring and the inner wall of the gas collecting pipe abut, the extrusion pieces are integrally fixed on the air plug, the inner wall of the extrusion pieces is fixed with an extrusion rod, the extrusion rod is distributed in the inner cavity of the air plug, and the extrusion rod and the air plug are penetrated.
[0006] In the above technical solution, further, the part where the extrusion rod and the air plug are penetrated is fixed with a movable piece, the extrusion pieces and the movable piece are both elastic sheet structures, and the extrusion rod is a rod structure.
[0007] In the above technical solution, further, the driving structure comprises a hemispherical block embedded in the lower part of the air plug, the hemispherical block is a hemispherical structure, the hemispherical block is provided with a rectangular sliding groove in a lattice distribution, the extrusion rod slides in the rectangular sliding groove, and the bottom wall of the inner cavity of the rectangular sliding groove is a slope.
[0008] In the above technical solution, further, the bottom surface of the hemispherical block is fixed with a pull rod, the lower end of the pull rod and the gas collecting pipe are penetrated, the pull rod drives the air plug to slide in the gas collecting pipe through the hemispherical block, and the top surface of the air plug and the inner wall of the upper end of the gas collecting pipe are fitted.
[0009] In the above technical solution, further, the pull rod is sleeved with a rotating pipe, the rotating pipe is threadedly connected to the lower part of the gas collecting pipe, the upper part of the inner cavity of the rotating pipe is fixed with a blocking ring, and the blocking ring and the air plug abut.
[0010] In the above technical solution, further, the blocking ring, the rotating pipe and the gas collecting pipe are coaxially distributed, the inner diameter of the blocking ring is smaller than the inner diameter of the lower end of the gas collecting pipe, and the rotating pipe is embedded on the shell structure.
[0011] In the above technical solution, further, the shell structure is fixed with an exhaust pipe and an air inlet pipe, the exhaust pipe and the air outlet pipe are fixed, and the air inlet pipe and the gas collecting pipe are fixed.
[0012] In the above technical solution, further, the shell structure is fixed with a display structure, the display structure is electrically connected with a gas detector, and the detection end of the gas detector is inserted into the inside of the gas collecting pipe.
[0013] Compared with the prior art, the present application has the following beneficial effects: The lower part of the gas collecting pipe in the waste gas detection device slides with a gas plug, which can block the lower part of the gas collecting pipe. When the gas plug slides downward, the inside of the gas collecting pipe is in a negative pressure state. At this time, the gas collecting pipe can transport the waste gas discharged by the chemical plant to the inside of the gas collecting pipe through the one-way valve. When the gas plug slides upward, the inside of the gas collecting pipe is in a high pressure state. At this time, the waste gas in the inside of the gas collecting pipe can be transported to the inside of the gas outlet pipe through the one-way valve, realizing the rapid discharge of the waste gas in the inside of the gas collecting pipe.
[0014] 2、The driving structure in the waste gas detection device drives the protrusion of the extrusion piece, and the top surface of the gas plug can be switched to a non-smooth surface structure. At this time, the worker can transport the cleaning liquid to the inside of the gas collecting pipe through the gas collecting pipe. The worker can stir the cleaning liquid in the inside of the gas collecting pipe by driving the extrusion piece on the gas plug, realizing the cleaning of the cleaning liquid on the gas collecting pipe to the inner wall of the gas collecting pipe. After the extrusion piece drives the cleaning liquid to clean the inner wall of the gas collecting pipe, the gas plug drives the cleaning liquid and aerosol in the inside of the gas collecting pipe to slide upward. At this time, the cleaning liquid and aerosol in the inside of the gas collecting pipe can pass through the one-way valve and be discharged through the gas outlet pipe, realizing the cleaning of the aerosol at the detection end of the gas collector and the gas detector, avoiding the influence of the aerosol on the subsequent waste gas detection in the inside of the gas collecting pipe.
[0015] 3、The bottom wall of the rectangular sliding groove inner cavity in the waste gas detection device is inclined. When the hemispherical block rotates forward on the gas plug, the bottom wall of the rectangular sliding groove inner cavity will extrude the extrusion rod. At this time, the extrusion rod can drive the protrusion of the extrusion piece. At this time, the protruding extrusion piece can stir the cleaning agent in the inside of the gas collecting pipe, which can facilitate the protruding extrusion piece to drive the cleaning liquid to clean the inner wall of the gas collecting pipe.
[0016] 4、When the waste gas enters the inside of the gas collecting pipe in the waste gas detection device, the gas plug can drive the waste gas in the inside of the gas collecting pipe to move up and down in the inside of the gas collecting pipe, and the protruding extrusion piece can disturb the waste gas in the inside of the gas collecting pipe. This can avoid the stratification of the waste gas in the inside of the gas collecting pipe, and facilitate the detection of the waste gas in the inside of the gas collecting pipe by the gas detector. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the present application; Figure 2 It is a connection structure diagram of the gas collecting pipe and the shell structure in the present application; Figure 3 It is a connection structure diagram of the gas plug and the gas collecting pipe in the present application; Figure 4 It is a connection structure diagram of the rotating pipe and the gas collecting pipe in the present application; Figure 5 It is a connection structure diagram of the hemispherical block and the gas plug in the present application; Figure 6 It is a connection structure diagram of the extrusion rod and the gas plug in the present application; Figure 7 Figure 1 is a connection structure diagram of a rectangular chute and a hemispherical block in the present application; Figure 8 Figure 1 is a connection structure diagram of a rectangular chute and a hemispherical block in the present application;
[0018] 1, shell structure; 11, display structure; 12, rotating pipe; 13, gas collecting pipe; 14, pull rod; 15, blocking ring; 2, exhaust pipe; 21, gas outlet pipe; 3, gas inlet pipe; 31, gas connecting pipe; 4, gas detector; 5, one-way valve; 6, gas plug; 61, sealing ring; 62, extrusion piece; 63, extrusion rod; 64, hemispherical block; 65, movable piece; 66, rectangular chute. DETAILED DESCRIPTION
[0019] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.
[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed below.
[0021] Example 1: please refer to Figures 1-8 The present application provides a technical solution as shown in the figure: The present application is a kind of chemical plant exhaust gas detection device, including shell structure 1 and the gas detector 4 connected to the shell structure 1, the inside of shell structure 1 is embedded with gas collecting pipe 13, the upper end of gas collecting pipe 13 is spherical structure, gas outlet pipe 21 and gas connecting pipe 31 are fixed on the spherical structure of gas collecting pipe 13, one-way valve 5 is fixed at the connection part of gas outlet pipe 21 and gas connecting pipe 31 with gas collecting pipe 13, gas plug 6 is sliding in the inner cavity of gas collecting pipe 13.
[0022] The top surface of gas plug 6 is smooth spherical structure, gas plug 6 is used to seal the lower end of gas collecting pipe 13, realize that the waste gas transported inside gas collecting pipe 13 by gas connecting pipe 31 enters the inside of gas outlet pipe 21; The top surface of gas plug 6 is dot matrix distribution extrusion piece 62, driving structure is arranged on gas plug 6, which drives extrusion piece 62 to protrude; In the actual use process, the waste gas discharged by the chemical plant can be transported into the inside of gas collecting pipe 13 through one-way valve 5 by gas connecting pipe 31, then the waste gas in the inside of gas collecting pipe 13 can be transported into the inside of gas outlet pipe 21 through one-way valve 5, realize that the inside of gas collecting pipe 13 forms airflow channel, it is convenient for gas detector 4 to detect the waste gas in the inside of gas collecting pipe 13, gas detector 4 can be selected as the gas detection assembly that can be purchased on the market; Because the lower part of the gas collecting pipe 13 has a sliding air plug 6, the air plug 6 can block the lower part of the gas collecting pipe 13. When the air plug 6 slides downward, the inside of the gas collecting pipe 13 is in a negative pressure state. At this time, the gas connecting pipe 31 can transport the waste gas discharged from the chemical plant through the one-way valve 5 to the inside of the gas collecting pipe 13. When the air plug 6 slides upward, the inside of the gas collecting pipe 13 is in a high pressure state. At this time, the waste gas inside the gas collecting pipe 13 can be transported through the one-way valve 5 to the inside of the gas outlet pipe 21, so as to realize the rapid discharge of the waste gas inside the gas collecting pipe 13. It should be noted that when the exhaust gas passes through the one-way valve 5 and the inside of the gas collection pipe 13, the air plug 6 can move the exhaust gas inside the gas collection pipe 13 by sliding up and down inside the gas collection pipe 13. This can prevent the exhaust gas inside the gas collection pipe 13 from stratifying, and make it easier for the gas detector 4 to detect the exhaust gas inside the gas collection pipe 13. Example 2: Please refer to Figures 1-8 As shown, based on Embodiment 1, the present invention provides a technical solution. Unlike Embodiment 1, in this embodiment, when the driving structure drives the extrusion plate 62 to bulge, the top surface of the air plug 6 can be switched to a non-smooth surface structure. At this time, the operator can deliver cleaning fluid to the inside of the air collection pipe 13 through the air inlet pipe 31. The operator can use the extrusion plate on the air plug 6 to agitate the cleaning fluid inside the air collection pipe 13, thereby cleaning the inner wall of the air collection pipe 13 with the cleaning fluid. After the extrusion plate 62 drives the cleaning fluid to clean the inner wall of the air collection pipe 13, the air plug 6 drives the cleaning fluid and aerosol inside the air collection pipe 13 to slide upward. At this time, the cleaning fluid and aerosol inside the air collection pipe 13 can pass through the one-way valve 5 and be discharged through the air outlet pipe 21.
[0023] The air plug 6 is a hollow hemispherical structure. A sealing ring 61 is fixed to the lower edge of the air plug 6. The sealing ring 61 abuts against the inner wall of the air collecting pipe 13. The extrusion plate 62 is integrally fixed to the air plug 6. An extrusion rod 63 is fixed to the inner wall of the extrusion plate 62. The extrusion rod 63 is distributed in the inner cavity of the air plug 6. The extrusion rod 63 and the air plug 6 pass through each other. The sealing ring 61 can scrape the aerosols on the inner wall of the gas collecting pipe 13, which can prevent a lot of aerosols from adhering to the inner wall of the gas collecting pipe 13. Since the top surface of the gas plug 6 is a smooth spherical structure, it can prevent a lot of aerosols in the exhaust gas from being distributed on the gas plug 6. When the gas plug 6 is equipped with a driving structure to drive the extrusion plate 62 to bulge, the top surface of the gas plug 6 can be switched to a rough surface structure. At this time, the operator can deliver cleaning fluid to the inside of the gas collecting pipe 13 through the air inlet pipe 31. The operator can drive the cleaning fluid inside the gas collecting pipe 13 to agitate through the extrusion plate on the gas plug 6, so that the cleaning fluid on the gas collecting pipe 13 can clean the inner wall of the gas collecting pipe 13. After the extrusion plate 62 drives the cleaning fluid to clean the inner wall of the gas collecting pipe 13, the gas plug 6 drives the cleaning fluid and aerosols inside the gas collecting pipe 13 to slide upward. At this time, the cleaning fluid and aerosols inside the gas collecting pipe 13 can pass through the one-way valve 5 and be discharged through the outlet pipe 21. Example 3: Please refer to Figures 1-8 As shown, based on Embodiment 2, the present invention provides a technical solution. Unlike Embodiment 2, the bottom wall of the inner cavity of the rectangular groove 66 in this embodiment is inclined. When the hemispherical block 64 rotates forward on the air plug 6, the bottom wall of the inner cavity of the rectangular groove 66 will press against the extrusion rod 63. At this time, the extrusion rod 63 can drive the extrusion plate 62 to bulge. At this time, the hemispherical block 64 continues to drive the air plug 6 to rotate forward. The bulging extrusion plate 62 can agitate the cleaning agent inside the gas collecting pipe 13, which can facilitate the cleaning liquid to clean the inner wall of the gas collecting pipe 13.
[0024] A movable piece 65 is fixed at the part through which the extrusion rod 63 and the air plug 6 pass. Both the extrusion piece 62 and the movable piece 65 are elastic sheet-like structures, and the extrusion rod 63 is a rod-like structure. The movable piece 65 can seal the part through which the extrusion rod 63 and the air plug 6 pass, thus preventing the gas inside the air plug 6 from being discharged through the gap between the extrusion rod 63 and the air plug 6.
[0025] The drive structure includes a hemispherical block 64 embedded in the lower part of the air plug 6. The hemispherical block 64 is a hemispherical structure. Rectangular grooves 66 are formed on the hemispherical block 64 in a dot matrix pattern. The extrusion rod 63 slides inside the rectangular grooves 66. The bottom wall of the inner cavity of the rectangular grooves 66 is an inclined surface. The hemispherical block 64 rotates in a sleeved manner on the air plug 6. Under normal use, the hemispherical block 64 does not separate from the air plug 6. Since the bottom wall of the inner cavity of the rectangular slide groove 66 is inclined, when the hemispherical block 64 rotates forward on the air plug 6, the bottom wall of the inner cavity of the rectangular slide groove 66 will squeeze the extrusion rod 63. At this time, the extrusion rod 63 can drive the extrusion plate 62 to bulge. At this time, the hemispherical block 64 continues to drive the air plug 6 to rotate forward. The bulging extrusion plate 62 can agitate the cleaning agent inside the gas collecting pipe 13, which can facilitate the cleaning liquid to clean the inner wall of the gas collecting pipe 13. When the hemispherical block 64 rotates in the opposite direction on the air plug 6, the bottom wall of the inner cavity of the rectangular slide groove 66 will not squeeze the extrusion rod 63. At this time, the extrusion rod 63 will not drive the extrusion plate 62 to bulge. When used under specific conditions, the operator can use the protruding extrusion plate 62 to turbulent the exhaust gas inside the gas collection pipe 13, which can prevent the exhaust gas inside the gas collection pipe 13 from stratifying and facilitate the gas detector 4 to detect the exhaust gas inside the gas collection pipe 13.
[0026] A pull rod 14 is fixed to the bottom surface of the hemispherical block 64. The lower end of the pull rod 14 passes through the gas collecting pipe 13. The pull rod 14 drives the air plug 6 to slide inside the gas collecting pipe 13 through the hemispherical block 64. The top surface of the air plug 6 matches the inner wall of the upper end of the gas collecting pipe 13. The operator can use the lever 14 to rotate the hemispherical block 64 on the air plug 6. When the lever 14 drives the air plug 6 to slide on the gas collecting pipe 13 through the hemispherical block 64, the cavity space inside the gas collecting pipe 13 that collects waste gas can be changed.
[0027] A rotating tube 12 is sleeved on the pull rod 14. The rotating tube 12 is threaded to the lower part of the air collecting tube 13. A retaining ring 15 is fixed to the upper part of the inner cavity of the rotating tube 12. The retaining ring 15 and the air plug 6 abut against each other.
[0028] The retaining ring 15, the rotating tube 12 and the gas collecting tube 13 are coaxially distributed. The inner diameter of the retaining ring 15 is smaller than the inner diameter of the lower end of the gas collecting tube 13. The rotating tube 12 is embedded in the shell structure 1. The retaining ring 15 can block the air plug 6, preventing the air plug 6 from being discharged from the inside of the air collection pipe 13.
[0029] An exhaust pipe 2 and an intake pipe 3 are fixed on the shell structure 1. The exhaust pipe 2 and the outlet pipe 21 are fixed, and the intake pipe 3 and the inlet pipe 31 are fixed.
[0030] A display structure 11 is fixed on the housing structure 1. The display structure 11 is electrically connected to the gas detector 4. The detection end of the gas detector 4 is inserted into the gas collecting tube 13. The display structure 11 can be selected as a commercially available display. The function of the display structure 11 in this document is to display the information of the exhaust gas detected by the gas detector 4. The display structure 11 and the gas detector 4 are connected to an external power supply. When the display structure 11 and the gas detector 4 are working, the gas detector 4 can transmit the exhaust gas detection information to the display structure 11. The staff can understand the information detected by the gas detector 4 through the display structure 11, and thus understand whether the exhaust gas emitted by the chemical plant meets the emission requirements. Working principle: In actual use, the gas inlet pipe 31 can transport the exhaust gas emitted by the chemical plant through the one-way valve 5 to the inside of the gas collection pipe 13. Then, the exhaust gas inside the gas collection pipe 13 can be transported through the one-way valve 5 to the inside of the gas outlet pipe 21, so as to form an airflow channel inside the gas collection pipe 13, which facilitates the gas detector 4 to detect the exhaust gas inside the gas collection pipe 13. The gas detector 4 can be selected from the gas detection components available on the market. The display structure 11 and the gas detector 4 are connected to an external power supply. When the display structure 11 and the gas detector 4 are working, the gas detector 4 can transmit the information of the exhaust gas detection to the display structure 11. The staff can understand the information detected by the gas detector 4 through the display structure 11, and thus understand whether the exhaust gas emitted by the chemical plant meets the emission requirements. Because the lower part of the gas collecting pipe 13 has a sliding air plug 6, the air plug 6 can block the lower part of the gas collecting pipe 13. When the air plug 6 slides downward, the inside of the gas collecting pipe 13 is in a negative pressure state. At this time, the gas connecting pipe 31 can transport the waste gas discharged from the chemical plant through the one-way valve 5 to the inside of the gas collecting pipe 13. When the air plug 6 slides upward, the inside of the gas collecting pipe 13 is in a high pressure state. At this time, the waste gas inside the gas collecting pipe 13 can be transported through the one-way valve 5 to the inside of the gas outlet pipe 21, so as to realize the rapid discharge of the waste gas inside the gas collecting pipe 13. The sealing ring 61 can scrape the aerosols on the inner wall of the gas collecting pipe 13, which can prevent a lot of aerosols from adhering to the inner wall of the gas collecting pipe 13. Since the top surface of the gas plug 6 is a smooth spherical structure, it can prevent a lot of aerosols in the exhaust gas from being distributed on the gas plug 6. When the gas plug 6 is equipped with a driving structure to drive the extrusion plate 62 to bulge, the top surface of the gas plug 6 can be switched to a rough surface structure. At this time, the operator can deliver cleaning fluid to the inside of the gas collecting pipe 13 through the air inlet pipe 31. The operator can drive the cleaning fluid inside the gas collecting pipe 13 to agitate through the extrusion plate on the gas plug 6, so as to clean the inner wall of the gas collecting pipe 13 with the cleaning fluid on the gas collecting pipe 13. The hemispherical block 64 is rotated on the air plug 6 in a sleeved manner. The operator can drive the hemispherical block 64 to rotate on the air plug 6 through the pull rod 14. Under normal use, the hemispherical block 64 is not separated from the air plug 6. Since the bottom wall of the inner cavity of the rectangular slide groove 66 is inclined, when the hemispherical block 64 rotates in the forward direction on the air plug 6, the bottom wall of the inner cavity of the rectangular slide groove 66 will squeeze the extrusion rod 63. At this time, the extrusion rod 63 can drive the extrusion plate 62 to bulge, which can facilitate the protruding extrusion plate 62 to drive the cleaning fluid to clean the inner wall of the air collection pipe 13. When the hemispherical block 64 rotates in the reverse direction on the air plug 6, the bottom wall of the inner cavity of the rectangular slide groove 66 will not squeeze the extrusion rod 63. At this time, the extrusion rod 63 will not drive the extrusion plate 62 to bulge. It should be noted that when the exhaust gas passes through the one-way valve 5 and the inside of the gas collection pipe 13, the air plug 6 can drive the exhaust gas inside the gas collection pipe 13 to move when it slides up and down inside the gas collection pipe 13. When used under specific conditions, the operator can turbulent the exhaust gas inside the gas collection pipe 13 through the protruding extrusion plate 62, which can avoid the stratification of exhaust gas inside the gas collection pipe 13 and facilitate the gas detector 4 to detect the exhaust gas inside the gas collection pipe 13.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.
Claims
1. A chemical plant exhaust gas detection device, comprising a housing structure (1) and a gas detector (4) connected to the housing structure (1), characterized in that: The housing structure (1) has an embedded gas collecting pipe (13). The upper end of the gas collecting pipe (13) is a spherical structure. An outlet pipe (21) and an inlet pipe (31) are fixed on the spherical structure of the gas collecting pipe (13). A one-way valve (5) is fixed at the connection between the outlet pipe (21) and the inlet pipe (31) and the gas collecting pipe (13). An air plug (6) slides in the lower part of the inner cavity of the gas collecting pipe (13). The top surface of the air plug (6) is a smooth spherical structure. The air plug (6) is used to seal the lower end of the gas collecting pipe (13) so that the waste gas transported by the gas receiving pipe (31) into the gas outlet pipe (21) can enter the interior of the gas collecting pipe (13). The top surface of the air plug (6) is dotted with extrusion plates (62), and the air plug (6) is provided with a driving structure to drive the extrusion plates (62) to protrude.
2. The chemical plant exhaust gas detection device according to claim 1, characterized in that, The air plug (6) is a hollow hemispherical structure. A sealing ring (61) is fixed to the lower edge of the air plug (6). The sealing ring (61) abuts against the inner wall of the air collecting pipe (13). The extrusion plate (62) is integrally fixed on the air plug (6). An extrusion rod (63) is fixed to the inner wall of the extrusion plate (62). The extrusion rod (63) is distributed in the inner cavity of the air plug (6). The extrusion rod (63) and the air plug (6) pass through each other.
3. The chemical plant exhaust gas detection device according to claim 2, characterized in that, The extrusion rod (63) and the air plug (6) are connected by a movable piece (65), both of which are elastic sheet structures, and the extrusion rod (63) is a rod structure.
4. The chemical plant exhaust gas detection device according to claim 2, characterized in that, The driving structure includes a hemispherical block (64) embedded in the lower part of the air plug (6). The hemispherical block (64) is a hemispherical structure. A rectangular groove (66) is provided on the hemispherical block (64) in a dot matrix pattern. The extrusion rod (63) slides inside the rectangular groove (66). The bottom wall of the inner cavity of the rectangular groove (66) is an inclined surface.
5. The chemical plant exhaust gas detection device according to claim 4, characterized in that, A pull rod (14) is fixed to the bottom surface of the hemispherical block (64). The lower end of the pull rod (14) passes through the gas collecting pipe (13). The pull rod (14) drives the air plug (6) to slide inside the gas collecting pipe (13) through the hemispherical block (64). The top surface of the air plug (6) matches the inner wall of the upper end of the gas collecting pipe (13).
6. The chemical plant exhaust gas detection device according to claim 5, characterized in that, A rotating tube (12) is sleeved on the pull rod (14). The rotating tube (12) is threaded to the lower part of the gas collecting pipe (13). A retaining ring (15) is fixed to the upper part of the inner cavity of the rotating tube (12). The retaining ring (15) and the air plug (6) abut against each other.
7. The chemical plant exhaust gas detection device according to claim 6, characterized in that, The retaining ring (15), rotating tube (12) and gas collecting tube (13) are coaxially distributed. The inner diameter of the retaining ring (15) is smaller than the inner diameter of the lower end of the gas collecting tube (13). The rotating tube (12) is embedded in the shell structure (1).
8. The chemical plant exhaust gas detection device according to claim 1, characterized in that, The shell structure (1) is fixed with an exhaust pipe (2) and an air inlet pipe (3), the exhaust pipe (2) and the air outlet pipe (21) are fixed, and the air inlet pipe (3) and the air inlet pipe (31) are fixed.
9. A chemical plant exhaust gas detection device according to claim 8, characterized in that, A display structure (11) is fixed on the housing structure (1). The display structure (11) is electrically connected to the gas detector (4). The detection end of the gas detector (4) is inserted into the gas collection pipe (13).