A kind of exhaust gas non-electrical variable detection control system and control method thereof

Abstract

The present invention relates to the technical field of exhaust gas detection equipment, and discloses an exhaust gas non-electric variable detection control system and a control method thereof. The structure of the exhaust gas detection box includes an exhaust gas detection box, a connecting device, a collection chamber, a non-electric variable detection unit, and a sealing cover device. The present invention adds a connecting device on one side of the exhaust gas detection box, drives a spiral plate to rotate by means of a first motor, and drives a plurality of clamps to perform a clamping movement synchronously through a spiral groove on the spiral plate, thereby driving a rubber cover to extend and retract to adjust the diameter size of the rubber cover, so that the rubber cover can be suitable for exhaust gas emission pipes of different diameters, thereby increasing the adaptability and detection efficiency of the exhaust gas detection box, and adds a sealing cover device on an intake pipe and an exhaust pipe, and the intake pipe and the exhaust pipe can be sealed by flipping the sealing cover, so that the collection chamber forms a closed space, and can form a quantitative collection of exhaust gas, thereby ensuring the standard amount during exhaust gas detection and increasing the reliability of the detection result.

Description

Technical Field

[0001] The present invention belongs to the field of exhaust gas detection equipment, and in particular relates to an exhaust gas non-electrical variable detection control system and a control method thereof. Background Art

[0002] In the process of industrial production, there is the generation of organic waste gas. In order to make the waste gas meet the emission requirements, it is often necessary to treat the waste gas before it is discharged. The existing methods for treating waste gas include: activated carbon adsorption treatment method, catalytic combustion method, catalytic oxidation method, acid-base neutralization method, plasma method and other treatment methods. After the waste gas is treated by the above methods, it is also necessary to detect the non-electrical variables of the treated waste gas to detect whether the waste gas meets the emission standards before the waste gas can be discharged;

[0003] In the prior art, when the treated exhaust gas is detected, the exhaust gas is usually collected by a detection device box and then detected. However, in the prior art, when the exhaust gas is collected, due to the different specifications of the exhaust gas treatment devices, when the exhaust gas is discharged, the sizes of the discharge pipes are different, so that when the detection device collects the exhaust gas, it is necessary to prepare connecting pipes of different specifications to connect the detection device with the exhaust gas discharge pipe, which is very inconvenient and affects the efficiency of the detection;

[0004] This application proposes an exhaust gas non-electrical variable detection control system and a control method thereof to improve the above-mentioned defects. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an exhaust gas non-electrical variable detection control system and a control method thereof which has the function of connecting exhaust gas emission pipes of different specifications and sizes.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An exhaust gas non-electric variable detection control system and a control method thereof, wherein the structure comprises an exhaust gas detection box, an intake pipe, a connecting device and an exhaust pipe, wherein the two ends of the exhaust gas detection box are respectively connected to an intake pipe and an exhaust pipe for intake and exhaust of exhaust gas, and a connecting device is installed on the intake pipe.

[0008] In a specific possible implementation scheme, the connecting device includes a connecting cover, a rubber cover, a clamping piece and a driving piece. The other end of the connecting cover is connected to the rubber cover. The outer annular array of the rubber cover has a plurality of clamping pieces, and the top of the clamping piece is slidably matched with the driving piece.

[0009] In a specific feasible implementation scheme, the clamping parts include a splint, a wave block, a curved plate, a slider and a clamping column. One side of the splint is densely covered with wave blocks, an curved plate is fixed to the upper end of one side of the splint, the curved plate is fixed to the rubber cover, a slider is fixed to the top of the curved plate, and a clamping column is installed on the top of the slider.

[0010] In a specific feasible implementation scheme, the driving member includes a mounting frame, a first motor, a connecting plate, a spiral plate and a limiting slide groove. The first motor is mounted on the mounting frame, connecting plates are mounted on both sides of the bottom output end of the first motor, the other end of the connecting plate is connected to the spiral plate, and the mounting frame has a limiting slide groove in a circular array.

[0011] In a specific possible implementation mode, the limiting sliding groove is in sliding cooperation with the sliding block, and the spiral groove on the spiral plate is in sliding cooperation with the clamping column.

[0012] In a specific possible implementation mode, the connecting cover includes a telescopic cover and a clearance opening. The connecting cover is symmetrically provided with the clearance opening, the clearance opening is connected to the mounting frame, the connecting cover is rotatably fitted with a telescopic cover, and the telescopic cover is connected to the connecting plate.

[0013] In a specific feasible implementation scheme, the exhaust gas detection box includes a collection chamber, a non-electric variable detection unit and a sealing cover device. The collection chamber is installed inside the exhaust gas detection box, the non-electric variable detection unit is installed on the side wall of the collection chamber, and a sealing cover device is installed at the connecting port between the collection chamber and the intake pipe and the exhaust pipe.

[0014] In a specific feasible implementation scheme, the sealing cover device includes a ring, a fixing member, a sealing cover and a limiting column. A sealing cover is installed on one side of the ring. The sealing cover can be fixed by the fixing member, which is installed on the ring. Two limiting columns connected to the ring are provided on the outer side of the fixing member.

[0015] In a specific possible implementation scheme, the fixing member includes a second motor, a driving gear, a rack, a ring and a baffle, the output end of the second motor is connected to the driving gear, a gear on one side of the driving gear is meshed with a rack, the rack is connected to the ring, and a plurality of baffles are arranged in an inner annular array of the ring.

[0016] In a specific possible implementation scheme, the sealing cover includes a base, a motor, a rotating shaft and a clamping plate. A rotating shaft is connected to one side of the sealing cover, and the rotating shaft rotates with the base. A motor is fixed to one side of the base, and a plurality of clamping plates are arranged in an annular array on the outer side of the sealing cover.

[0017] According to the technical solution proposed above, the exhaust gas non-electrical variable detection control system and control method thereof of the present invention have the following beneficial effects:

[0018] (1) The present invention adds a connecting device on one side of the exhaust gas detection box, drives the spiral plate to rotate with the help of a first motor, and drives a plurality of assembly clamps to perform a clamping movement synchronously through the spiral grooves provided on the spiral plate. When the assembly clamps move, they can only move forward and backward on the mounting frame with the help of the limiting effect of the limiting slide groove, thereby driving the rubber cover to expand and contract and adjust the diameter size of the rubber cover, so that the rubber cover can be suitable for exhaust gas emission pipes of different diameters, thereby increasing the adaptability and detection efficiency of the exhaust gas detection box.

[0019] (2) The present invention has a plurality of wave blocks densely distributed on the clamping plate of the clamping part. With the help of the wave-shaped structure, the friction between the contact surface of the clamping plate and the pipe can be increased, so that when the rubber cover is sleeved on the pipe, the clamping plate can simultaneously clamp the exhaust gas emission pipe, thereby increasing the sleeve stability of the rubber cover.

[0020] (3) The present invention adds a sealing cover device to the intake pipe and the exhaust pipe. The intake pipe and the exhaust pipe can be sealed by turning the sealing cover, so that the collection chamber forms a closed space and can quantitatively collect the exhaust gas, thereby ensuring the standard amount of exhaust gas during detection and increasing the reliability of the detection result.

[0021] (4) The present invention drives the driving gear to rotate through the second motor, and with the help of the gear meshing between the driving gear and the rack, drives the ring to rotate until it contacts the limit column and stops. At this time, the baffle on the ring will rotate to the clamping plate of the sealing cover and engage with the clamping plate to fix the sealing cover and increase the sealing effect of the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an exhaust gas non-electrical variable detection control system and a control method thereof in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of the connecting device in the embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the clamping member in the embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the structure of the driving member in the embodiment of the present application;

[0027] Figure 5This is a schematic diagram of the structure of the mounting frame and the spiral plate in the embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the connection between the connecting cover and the spiral plate in the embodiment of the present application;

[0029] Figure 7 This is a schematic diagram of the structure of the connection cover in the embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the internal structure of the exhaust gas detection box in the embodiment of the present application;

[0031] Fig. 9 This is a schematic diagram of the structure of the sealing cover device in the embodiment of the present application;

[0032] Fig.10 This is a schematic diagram of the structure of the fixing member in the embodiment of the present application;

[0033] Fig.11 This is a schematic diagram of the structure of the sealing cover in the embodiment of the present application;

[0034] Fig.12 It is a schematic diagram of the active state of the fixing member in the embodiment of the present application.

[0035] In the figure: exhaust gas detection box-1, intake pipe-2, connecting device-3, exhaust pipe-4, connecting cover-31, rubber cover-32, clamping part-33, driving part-34, clamping plate-331, wave block-332, arc plate-333, slider-334, clamping column-335, mounting frame-341, first motor-342, connecting plate-343, spiral plate-344, limiting slide groove-345, telescopic cover-311, making way opening-312, collection chamber-11, non-electric variable detection unit-12, sealing cover device-13, collar-131, fixing part-132, sealing cover-133, limiting column-134, second motor-41, driving gear-42, rack-43, ring-44, baffle-45, base-51, motor-52, rotating shaft-53, clamping plate-54. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] Example 1: Please refer to Figure 1-Figure 7 , the specific embodiments of the present invention are as follows:

[0038] An exhaust gas non-electric variable detection control system and a control method thereof, wherein the structure comprises an exhaust gas detection box 1, an intake pipe 2, a connecting device 3 and an exhaust pipe 4, wherein the two ends of the exhaust gas detection box 1 are respectively connected to the intake pipe 2 and the exhaust pipe 4 for intake and exhaust of the exhaust gas, and the intake pipe 2 is provided with a connecting device 3 for installation and connection to the exhaust port of the exhaust gas emission device.

[0039] See also Figure 2 The connecting device 3 includes a connecting cover 31, a rubber cover 32, a clamping member 33 and a driving member 34. The other end of the connecting cover 31 is connected to the rubber cover 32. The outer annular array of the rubber cover 32 has a plurality of clamping members 33. The top of the clamping member 33 is slidably matched with the driving member 34, and the clamping member 33 can be driven to move by the driving member 34.

[0040] See also Figure 3 The clamping part 33 includes a clamping plate 331, a wave block 332, an arc plate 333, a slider 334 and a clamping column 335. One side of the clamping plate 331 is densely covered with wave blocks 332. An arc plate 333 is fixed to the upper end of one side of the clamping plate 331. The arc plate 333 is fixed to the rubber cover 32 and can drive the rubber cover 32 to expand and contract in size when moving. A slider 334 is fixed to the top of the arc plate 333, and a clamping column 335 is installed on the top of the slider 334.

[0041] See also Figure 3 The wave block 332 is provided with a wave-shaped structure, which can increase the friction between the contact surface of the clamping plate 331 and the pipe, so that when the rubber cover 32 is sleeved with the pipe, the clamping plate 331 can clamp the exhaust gas discharge pipe at the same time, thereby increasing the sleeve stability of the rubber cover 32.

[0042] See also Figure 4-Figure 5 The driving member 34 includes a mounting frame 341, a first motor 342, a connecting plate 343, a spiral plate 344 and a limiting slide groove 345. The mounting frame 341 is connected to the connecting cover 31. The first motor 342 is installed on the mounting frame 341. Connecting plates 343 are installed on both sides of the bottom output end of the first motor 342. The other end of the connecting plate 343 is connected to the spiral plate 344 and can drive the spiral plate 344 to rotate with the help of the drive of the first motor 342. There is a limiting slide groove 345 in an annular array on the mounting frame 341.

[0043] See also Figure 4-Figure 5The limiting groove 345 slides with the slider 334, and the spiral groove on the spiral plate 344 slides with the clamping column 335. When the first motor 342 drives the spiral plate 344 to rotate through the connecting plate 343, the sliding engagement between the spiral groove on the spiral plate 344 and the clamping column 335 will drive the clamping part 33 to move. Through the limiting effect of the limiting groove 345, the clamping part 33 can only move back and forth on the mounting frame 341, driving the rubber cover 32 to telescope and adjust the diameter size of the rubber cover 32.

[0044] See also Figure 6-Figure 7 The connecting cover 31 includes a telescopic cover 311 and a clearance opening 312. The connection cover 31 is symmetrically provided with the clearance opening 312, which is connected to the mounting frame 341, and can make way for the connection between the connection cover 31 and the mounting frame 341. The connecting cover 31 is rotatably equipped with a telescopic cover 311, and the telescopic cover 311 is connected to the connecting plate 343. Through the telescopic performance of the telescopic cover 311, when the connecting plate 343 rotates under the action of the first motor 342, it will rotate on the connecting cover 31 without causing the exhaust gas to be emitted from the connecting cover 31.

[0045] Example 2: Please refer to Figure 8-Figure 12 , the specific embodiments of the present invention are as follows:

[0046] See also Figure 8 The exhaust gas detection box 1 includes a collection chamber 11, a non-electric variable detection unit 12 and a sealing cover device 13. The exhaust gas detection box 1 is equipped with a collection chamber 11 capable of sealing and storing the exhaust gas discharged from the intake pipe 2. The side wall of the collection chamber 11 is equipped with a non-electric variable detection unit 12 capable of performing non-electric variable detection on the exhaust gas. The non-electric variable detection unit 12 is electrically connected to an external controller and detector, and can transmit the detected data result signal to an external detector for observation. A sealing cover device 13 is installed at the connection port between the collection chamber 11 and the intake pipe 2 and the exhaust pipe 4.

[0047] See also Fig. 9 The sealing cover device 13 includes a collar 131, a fixing member 132, a sealing cover 133 and a limiting column 134. One end of the collar 131 is connected to the intake pipe 2 and the exhaust pipe 4. The other side of the collar 131 is provided with a sealing cover 133 capable of sealing the intake pipe 2 and the exhaust pipe 4. The sealing cover 133 can be fixed by the fixing member 132. The fixing member 132 is installed on the collar 131. Two limiting columns 134 connected to the collar 131 are provided on the outer side of the fixing member 132.

[0048] See also Fig.10The fixing member 132 includes a second motor 41, a driving gear 42, a rack 43, a ring 44 and a baffle 45. The output end of the second motor 41 is connected to the driving gear 42 located on the sleeve ring 131. A rack 43 is meshed with a gear on one side of the driving gear 42. The rack 43 is connected to the ring 44. The inner ring array of the ring 44 has a plurality of baffles 45. When the rack 43 rotates left and right under the drive of the driving gear 42, the position of the rack 43 is limited by the limiting column 134. The rotation distance of the rack 43 is the sealing distance of the baffle 45 to the sealing cover 133.

[0049] See also Figure 11-Figure 12 The sealing cover 133 includes a base 51, a motor 52, a rotating shaft 53 and a clamping plate 54. A rotating shaft 53 is connected to one side of the sealing cover 133. The rotating shaft 53 rotates with the base 51. The base 51 is installed on the ring 131. A motor 52 is fixed to one side of the base 51. The rotating shaft 53 can be driven by the motor 52 to rotate, thereby driving the sealing cover 133 to flip and open the cover. There are several clamping plates 54 in the outer annular array of the sealing cover 133. The size of the clamping plate 54 is the same as that of the baffle 45.

[0050] Based on the above embodiment, a method for detecting and controlling non-electrical variables of exhaust gas is specifically implemented as follows:

[0051] S1, when it is necessary to perform non-electrical variable detection on the waste gas after treatment, the waste gas detection box 1 is connected to the exhaust pipe of the waste gas emission device through the connection device 3 on one side of the waste gas detection box 1, so that the waste gas can be collected inside the collection chamber 11 in the waste gas detection box 1;

[0052] S2, the connecting device 3 drives the connecting plate 343 and the spiral plate 344 connected to the connecting plate 343 to rotate on the connecting cover 31 through the first motor 342 thereon, and can drive the plurality of assembly clamps 33 to move and clamp synchronously by means of the spiral grooves provided on the spiral plate 344;

[0053] S3, when the clamping member 33 is moving, the limiting sliding groove 345 limits the clamping member 33 to move forward and backward on the mounting frame 341, thereby driving the rubber cover 32 to extend and retract to adjust the diameter of the rubber cover 32, so that the rubber cover 32 can be applied to exhaust pipes with different diameters;

[0054] S4, after the exhaust gas enters the exhaust gas detection box 1, it will accumulate inside the collection chamber 11. When a certain amount of exhaust gas to be detected is collected inside the collection chamber 11, the sealing cover 133 in the sealing cover device 13 on the intake pipe 2 is driven by the motor 52 to flip, and the intake pipe 2 is blocked so that the exhaust gas no longer enters the collection chamber;

[0055] S5, and then the second motor 41 drives the driving gear 42 to rotate, and the gear meshing between the driving gear 42 and the rack 43 drives the ring 44 to rotate until it contacts the limiting column 134 and stops. At this time, the baffles 45 on the ring 44 rotate to the card plate 54 of the sealing cover 133, and the sealing cover 133 can be fixed by the card engagement between the baffles 45 and the card plate 54, thereby increasing the sealing effect of the sealing cover 133;

[0056] S6, then the non-electrical variable detection unit 12 installed on the side wall of the collection chamber 11 detects the non-electrical variable of the internal exhaust gas, and the detection data is transmitted to the external detector through electrical signals, which is convenient for the staff to observe;

[0057] S7, after completing the detection of non-electrical variables of the exhaust gas, the sealing cover device 13 on the exhaust pipe 4 is opened so that the sealing cover 133 loses its sealing effect on the exhaust pipe 4, and the exhaust gas in the collection chamber 11 can be discharged, thereby completing the detection of the exhaust gas.

[0058] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] The control method of the present invention is to control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field, so the present invention will not explain the control method and circuit connection in detail.

[0060] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An exhaust gas non-electric variable detection and control system, the structure of which comprises an exhaust gas detection box (1), an intake pipe (2) and an exhaust pipe (4) located at both ends of the exhaust gas detection box (1), and a connecting device (3) installed on the intake pipe (2); Features: The connecting device (3) comprises a connecting cover (31), a rubber cover (32) located at one end of the connecting cover (31), a plurality of clamping members (33) arranged in an array outside the rubber cover (32), and a driving member (34) for slidingly cooperating with the top of the clamping member (33); The clamping member (33) comprises a clamping plate (331), wave blocks (332) densely distributed on one side of the clamping plate (331), an arc-shaped plate (333) located at the upper end of one side of the clamping plate (331), a slider (334) located at the top of the arc-shaped plate (333), and a clamping column (335) located at the top of the slider (334); The driving member (34) comprises a mounting frame (341), a first motor (342) located on the mounting frame (341), a connecting plate (343) provided at the bottom of the first motor (342), a spiral plate (344) located at the other end of the connecting plate (343), and a limiting sliding groove (345) arrayed on the mounting frame (341); The exhaust gas detection box (1) comprises a collection chamber (11), a non-electrical variable detection unit (12) located on the side wall of the collection chamber (11), and a sealing cover device (13) installed at the connection port between the collection chamber (11) and the intake pipe (2) and the exhaust pipe (4); The sealing cover device (13) comprises a collar (131), a sealing cover (133) located on one side of the collar (131), a fixing member (132) used to cooperate with the sealing cover (133), and a limiting column (134) located outside the fixing member (132) and connected to the collar (131); one end of the collar (131) is connected to the intake pipe (2) and the exhaust pipe (4); The wave block (332) is provided with a wave-shaped structure and is in contact with the exhaust gas discharge pipe; The limiting slide groove (345) is slidably matched with the slider (334), and the spiral groove on the spiral plate (344) is slidably matched with the clamping column (335). When the first motor (342) drives the spiral plate (344) to rotate via the connecting plate (343), the spiral groove on the spiral plate (344) and the clamping column (335) are slidably matched to drive the clamping member (33) to move. The limiting action of the limiting slide groove (345) enables the clamping member (33) to move only forward and backward on the mounting frame (341), thereby driving the rubber cover (32) to telescope and adjust the diameter of the rubber cover (32). The connecting cover (31) comprises a telescopic cover (311) and a clearance opening (312); the connecting cover (31) is symmetrically provided with the clearance opening (312); the clearance opening (312) is connected to the mounting frame (341); the connecting cover (31) is rotatably fitted with the telescopic cover (311); and the telescopic cover (311) is connected to the connecting plate (343); The fixing member (132) comprises a second motor (41), a driving gear (42), a rack (43), a circular ring (44) and a baffle (45); the output end of the second motor (41) is connected to the driving gear (42) located on the sleeve ring (131); a gear on one side of the driving gear (42) is meshed with a rack (43); the rack (43) is connected to the circular ring (44); a plurality of baffles (45) are arranged in an annular array inside the circular ring (44); when the rack (43) rotates left and right under the drive of the driving gear (42), the position of the rack (43) is limited by the limiting column (134); the rotation distance of the rack (43) is the sealing distance of the baffle (45) to the sealing cover (133).

2. According to claim 1, an exhaust gas non-electric variable detection and control system, Features: The sealing cover (133) comprises a rotating shaft (53), a base (51) located on the rotating shaft (53), a motor (52) arranged on one side of the base (51), and a plurality of clamping plates (54) arranged in an array on the outside of the sealing cover (133).

3. A control method for an exhaust gas non-electrical variable detection and control system, using the exhaust gas non-electrical variable detection and control system of claim 2, Features: The control method is as follows: S1, when it is necessary to perform non-electrical variable detection on the waste gas after treatment, the waste gas detection box (1) is connected to the exhaust pipe of the waste gas emission device through the connection device (3) on one side of the waste gas detection box (1), so that the waste gas can be collected inside the collection chamber (11) in the waste gas detection box (1); S2, the connecting device (3) drives the connecting plate (343) and the spiral plate (344) connected to the connecting plate (343) to rotate on the connecting cover (31) through the first motor (342) thereon, and can drive the plurality of assembly clamps (33) to move and clamp synchronously by means of the spiral grooves provided on the spiral plate (344); S3, when the clamping member (33) is moving, the limiting action of the limiting slide groove (345) allows the clamping member (33) to move only forward and backward on the mounting frame (341), thereby driving the rubber cover (32) to extend and retract to adjust the diameter of the rubber cover (32), so that the rubber cover (32) can be suitable for exhaust gas discharge pipes with different diameters; S4, after the exhaust gas enters the exhaust gas detection box (1), it will accumulate inside the collection chamber (11). When a certain amount of exhaust gas to be detected is collected inside the collection chamber (11), the sealing cover (133) in the sealing cover device (13) located on the air intake pipe (2) is driven by the motor (52) to flip, thereby blocking the air intake pipe (2) so that the exhaust gas no longer enters the collection chamber; S5, the second motor (41) then drives the driving gear (42) to rotate, and the gear meshing between the driving gear (42) and the rack (43) drives the ring (44) to rotate until it contacts the limiting column (134) and stops. At this time, a plurality of baffles (45) on the ring (44) rotate onto the clamping plate (54) of the sealing cover (133), and the sealing cover (133) can be fixed by the clamping limit between the baffles (45) and the clamping plate (54), thereby increasing the sealing effect of the sealing cover (133); S6, then the non-electrical variable detection unit (12) installed on the side wall of the collection chamber (11) detects the non-electrical variable of the internal exhaust gas, and the detection data is transmitted to the external detector through an electrical signal, so as to facilitate observation by the staff; S7, after the non-electrical variable detection of the exhaust gas is completed, the sealing cover device (13) on the exhaust pipe (4) is opened, so that the sealing cover (133) loses its sealing effect on the exhaust pipe (4), and the exhaust gas in the collection chamber (11) can be discharged, thereby completing the detection of the exhaust gas.

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