Tail gas detection auxiliary device for assisting probe positioning

Abstract

The invention discloses a tail gas detection auxiliary device for assisting probe positioning, relates to the technical field of tail gas detection, and aims to solve the problems that during tail gas detection, a tail gas pipe vibrates during gas exhausting, and when a detection end is not limited due to vibration of the tail gas pipe, the detection end is in contact with the inner wall of the tail gas pipe under vibration, and damage is caused. According to the tail gas detection auxiliary device for assisting probe positioning, through elastic deformation of an elastic folded plate, an arc clamping block is driven to clamp and fix the outer side of a detection probe, a magnetic ring is installed in a positioning cover in a matched mode, and the detection end of the detection probe is positioned and fixed, so that after the probe is fixed, the detection end is limited and positioned at the same time; through cooperative fixation of an arc clamping block and a magnetic ring, the probe is prevented from deviating during vibration, and meanwhile, damage caused by contact with the inner wall of a tail gas pipe under vibration when the detection end is not limited due to vibration of the tail gas pipe in the tail gas leading-out process is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas detection, in particular to an auxiliary device for exhaust gas detection which assists in the positioning of a probe. Background Art

[0002] At present, exhaust gas detection refers to the process of detecting the content of various pollutants in the exhaust gas of motor vehicles. The composition and emission of exhaust gas can also reflect the combustion efficiency and working status of the vehicle engine to a certain extent. Under normal circumstances, the content of pollutants in the exhaust gas of a fully burned engine is relatively low. If the exhaust gas detection result is abnormal, it may mean that there is a fault in the vehicle engine, such as aging of spark plugs, clogging of fuel injectors, etc. This helps to timely discover potential mechanical problems of the vehicle;

[0003] During exhaust gas testing, the exhaust pipe will vibrate when exhausting. Due to the vibration of the exhaust pipe, when the detection end is not restricted, it will contact the inner wall of the exhaust pipe under the vibration, causing damage. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an auxiliary device for exhaust gas detection for assisting probe positioning, comprising:

[0005] A positioning mechanism, which is used to fix the exhaust gas detection probe and locate the probe after the probe is inserted into the exhaust pipe;

[0006] An air guide mechanism, the air guide mechanism is used to guide the exhaust gas led out of the exhaust pipe to the probe position, and the positioning mechanism is installed inside the air guide mechanism;

[0007] An inner buckle mechanism, which is used to support the inner wall of the tailpipe to fix the device to the tailpipe, and the inner buckle mechanism is fixedly installed on the outside of the air guide mechanism;

[0008] Wherein, the positioning mechanism comprises a fixed cover, a positioning cover is fixedly installed on one end of the fixed cover, a magnetic ring is fixedly installed on the inner wall of the positioning cover, a fixing ring is fixedly installed on the other end of the fixed cover, a threaded plate is fixedly installed on the outer side of the fixing ring, the threaded plate is evenly installed along the center position of the fixed ring, and an empty groove is opened at the center position of the outer side of the threaded plate, and an elastic folding plate is installed at the empty groove of the threaded plate, and the arc clamping block is driven to clamp and fix the outer side of the detection probe through the elastic deformation of the elastic folding plate, and the magnetic ring is installed inside the positioning cover to position and fix the detection end of the detection probe, so that after the probe is fixed, the detection end is also restricted in positioning, and the arc clamping block and the magnetic ring are fixed together to prevent the probe from being offset during vibration, and at the same time, it is prevented from contacting the inner wall of the exhaust pipe under vibration when the detection end is not restricted during the exhaust gas extraction process due to the vibration of the exhaust pipe, causing damage, one end of the elastic folding plate is fixedly connected to the empty groove of the threaded plate, and the other end of the elastic folding plate is fixedly connected to a slip ring, and the inner wall of the slip ring is slidably adapted to the non-opposite surface of the threaded plate.

[0009] Preferably, the outer side of the threaded plate is threadedly connected to a threaded ring, and the side of the threaded ring close to the fixed ring is fitted with the outer side of the slip ring, and the end of the threaded plate away from the fixed ring is fixedly connected to a limiting disk, and the center positions of the opposite surfaces of the elastic folding plates are fixedly installed with arc clamps, and the center position of the outer side of the fixed cover is evenly installed with a hole plate, and a circular hole is opened at the end of the outer side of the hole plate away from the fixed cover, and the circular hole of the hole plate is fixedly connected to the air guide mechanism, and a groove cover plate is fixedly installed at one end of the outer side of the fixed cover close to the positioning cover, through the groove cover plate, during exhaust gas detection, the exhaust gas after contacting the detection probe is guided, and the exhaust gas after detection is conducted to the surroundings, and the exhaust gas is discharged through the arc groove at the edge, while avoiding contact with the non-detection end of the detection probe, to avoid heat damage to the detection probe due to excessively high exhaust temperature, and arc grooves are evenly opened at the edge of the outer side of the groove cover plate.

[0010] Preferably, the air guide mechanism includes a groove ring, the outer side of the groove ring is evenly provided with grooves, the groove ring is clamped with the inner buckle mechanism through the grooves, and the inner wall of the groove ring is fixedly installed with a buckle plate, the buckle plate is evenly installed along the center position of the groove ring, and the buckle plate is fixedly installed with a connecting block at one end of the buckle plate away from the groove ring, and the buckle plate is fixedly connected to the air guide cover through the connecting block. Through the change of the inner diameter of the air guide cover, after the exhaust gas enters the inside of the air guide cover, the exhaust gas entering the air guide cover is guided through the change of the inner diameter, so that the exhaust gas is concentrated and conducted to the detection end of the detection probe, so that the detection end can better contact the exhaust gas, thereby improving the detection accuracy. The closer the inner diameter of the air guide cover is to the positioning The smaller the cover, the central axis of the air guide cover and the central axis of the positioning cover are on the same straight line, the inner wall of the groove ring is fixedly installed with a hole block, the hole block is evenly installed along the center position of the groove ring, and the hole block is located between the buckle plates, and the inner wall of the hole block is slidably installed with a sliding rod, which is installed by sliding the hole block and the sliding rod, and is fixedly connected to the positioning mechanism through the sliding rod. When detecting exhaust gas, the detection end of the detection probe can penetrate into different positions of the exhaust pipe through the sliding of the sliding rod, so that the probe can detect exhaust gas at different positions, avoiding the fixed detection position and causing inaccurate results. The outer end of the sliding rod away from the hole block is fixedly connected to the circular hole of the orifice plate.

[0011] Preferably, the inner buckle mechanism comprises an outer cover ring, the inner wall of the outer cover ring is fixedly mounted with a clamping plate, the outer cover ring is clamped with the clamping groove of the groove ring through the clamping plate, and the outer side of the outer cover ring is fixedly mounted with a fixing block, the inner wall of the fixing block is rotatably mounted with a screw rod, the outer side of the outer cover ring is fixedly mounted with a slide plate, the slide plate is evenly mounted along the center position of the circle of the outer cover ring, and a slide groove is provided at the center position of the top of the slide plate, side plates are fixedly mounted on the top of the slide plate, the side plates are symmetrically mounted along the center position of the axis of the slide plate, and through grooves are provided on the outer sides of the side plates, and limit blocks are slidably mounted at the through grooves of the side plates, and the limit An inner support block is fixedly installed between the positioning blocks, and the inner support block contacts the inner wall of the exhaust pipe. When the contact pressure is increased after the contact, the carbon deposits on the inner wall of the exhaust pipe are partially entered into the groove through the groove of the inner support block after contacting the inner wall of the exhaust pipe, and the carbon deposits are compacted at the same time to increase the friction and prevent the exhaust pipe from sliding when the exhaust vibrates. A groove is provided on the top of the inner support block, and the edges on both sides of the bottom of the inner support block are arc-shaped, and an arc block is slidably installed at the slide groove of the slide groove plate, and the arc block is symmetrically installed along the center position of the axis of the slide groove, and the opposite surface of the arc block is an arc surface, and the inner wall of the arc block is threadedly connected to the outer side of the screw rod.

[0012] The present invention provides an auxiliary device for exhaust gas detection that assists in the positioning of a probe. It has the following beneficial effects:

[0013] 1. The auxiliary device for exhaust gas detection that assists the positioning of the probe drives the arc clamp to clamp and fix the outer side of the detection probe through the elastic deformation of the elastic folding plate, and is installed inside the magnetic ring in cooperation with the positioning cover to position and fix the detection end of the detection probe. After the probe is fixed, the detection end is also restricted and positioned. The coordination and fixation of the arc clamp and the magnetic ring prevents the position of the probe from shifting during vibration. At the same time, it prevents the vibration of the exhaust pipe during the exhaust gas extraction process, which causes the detection end to be not restricted and contact the inner wall of the exhaust pipe under vibration, causing damage.

[0014] 2. The auxiliary device for exhaust gas detection used to locate the auxiliary probe guides the exhaust gas after contacting the detection probe through the slot cover plate during exhaust gas detection. The exhaust gas after detection is conducted to the surroundings and discharged through the arc slot at the edge. At the same time, it avoids contacting the non-detection end of the detection probe to avoid heat damage to the detection probe due to excessively high exhaust temperature.

[0015] 3. The auxiliary device for exhaust gas detection used to position the auxiliary probe guides the exhaust gas entering the air guide hood through the change of the inner diameter of the air guide hood after the exhaust gas enters the inside of the air guide hood, so that the exhaust gas is concentrated and transmitted to the detection end of the detection probe, so that the detection end can better contact the exhaust gas and improve the detection accuracy.

[0016] 4. The auxiliary device for exhaust gas detection, which assists in positioning the probe, is installed by sliding between the hole block and the slide rod, and is fixedly connected to the positioning mechanism through the slide rod. When detecting exhaust gas, the detection end of the detection probe can penetrate into different positions of the exhaust pipe through the sliding of the slide rod, so that the probe can detect exhaust gas at different positions, avoiding the fixed detection position and causing inaccurate results.

[0017] 5. The auxiliary device for exhaust gas detection used for auxiliary probe positioning contacts the inner wall of the exhaust pipe through the inner support block. When the contact pressure is increased after the contact, the grooves of the inner support block contact the inner wall of the exhaust pipe, so that part of the carbon deposits on the inner wall of the exhaust pipe enter the grooves, and at the same time the carbon deposits are compacted to increase friction and prevent sliding when the exhaust pipe vibrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of an auxiliary device for exhaust gas detection that assists in positioning a probe according to the present invention;

[0019] Figure 2 This is a schematic structural diagram of an auxiliary device for exhaust gas detection that assists in positioning a probe according to the present invention;

[0020] Figure 3 It is a schematic diagram of the positioning mechanism structure of the present invention;

[0021] Figure 4 It is a side view of the positioning mechanism structure of the present invention;

[0022] Figure 5 It is a partial structural schematic diagram of the positioning mechanism of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the gas guide mechanism of the present invention;

[0024] Figure 7 It is a side view of the gas guide mechanism structure of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the inner buckle mechanism of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the inner buckle mechanism of the present invention.

[0027] In the figure: 1. positioning mechanism; 2. air guide mechanism; 3. inner buckle mechanism; 101. groove cover plate; 102. positioning cover; 103. threaded ring; 104. threaded plate; 105. fixed cover; 106. hole plate; 107. fixed ring; 108. limit plate; 109. elastic folding plate; 110. arc clamp block; 111. magnetic ring; 112. slip ring; 21. groove ring; 22. buckle plate; 23. connecting block; 24. hole block; 25. slide rod; 26. air guide cover; 31. outer cover ring; 32. clamping plate; 33. screw rod; 34. fixed block; 35. slide groove plate; 36. side plate; 37. limit block; 38. inner support block; 39. arc surface block. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0029] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution: an auxiliary device for exhaust gas detection for assisting probe positioning, comprising:

[0030] A positioning mechanism 1, which is used to fix the exhaust gas detection probe and locate the probe after the probe is inserted into the exhaust pipe;

[0031] An air guide mechanism 2, the air guide mechanism 2 is used to guide the exhaust gas led out of the exhaust pipe to the probe position, and the positioning mechanism 1 is installed inside the air guide mechanism 2;

[0032] The inner buckle mechanism 3 is used to support the inner wall of the tailpipe to fix the device to the tailpipe, and the inner buckle mechanism 3 is fixedly installed on the outer side of the air guide mechanism 2;

[0033] The positioning mechanism 1 includes a fixed cover 105, a positioning cover 102 is fixedly installed on one end of the fixed cover 105, a magnetic ring 111 is fixedly installed on the inner wall of the positioning cover 102, a fixed ring 107 is fixedly installed on the other end of the fixed cover 105, a threaded plate 104 is fixedly installed on the outer side of the fixed ring 107, the threaded plate 104 is evenly installed along the center position of the fixed ring 107, and an empty groove is opened at the center position of the outer side of the threaded plate 104, and an elastic folding plate 109 is installed at the empty groove of the threaded plate 104, the detection end of the exhaust gas detection probe is inserted into the positioning mechanism 1, the probe passes through the arc clamp block 110, and the detection end of the probe is deeply inserted into the positioning cover 102, through the positioning cover 1 02, the magnetic ring 111 inside the detection probe magnetically attracts the detection end of the detection probe, and cooperates with the positioning cover 102 to position and fix the detection end of the probe, and then by rotating the threaded ring 103, the threaded ring 103 is connected with the threaded plate 104, so that the threaded ring 103 is close to the fixed ring 107. In the process of the threaded ring 103 approaching the fixed ring 107, the slip ring 112 is pushed to approach the fixed ring 107 through contact with the slip ring 112. One end of the elastic folding plate 109 is fixedly connected to the empty groove of the threaded plate 104, and the other end of the elastic folding plate 109 is fixedly connected to the slip ring 112. The inner wall of the slip ring 112 is slidably adapted to the non-opposite surface of the threaded plate 104.

[0034] The outer side of the threaded plate 104 is threadedly connected with a threaded ring 103, and the side of the threaded ring 103 close to the fixed ring 107 is fitted with the outer side of the slip ring 112. The end of the threaded plate 104 away from the fixed ring 107 is fixedly connected to the limit plate 108, and the center position of the opposite surface of the elastic folding plate 109 is fixedly installed with an arc clamp block 110. The center position of the outer side of the fixed cover 105 is evenly installed with a hole plate 106. The end of the outer side of the hole plate 106 away from the fixed cover 105 is provided with a circular hole. When the slip ring 112 approaches along the threaded plate 104, the elastic folding plate 109 is elastically deformed and twisted, so that the center of the opposite surface of the elastic folding plate 109 The positions are close to each other, driving the arc clamp block 110 to approach the center position, clamping and fixing the outer side of the exhaust gas detection probe, and at the same time, during the detection process, the groove cover plate 101 cooperates with the gas guide mechanism 2 to make the exhaust gas conducted to the position of the probe, and after being conducted to the detection end of the probe, the exhaust gas is guided by the groove cover plate 101, and the exhaust gas is conducted to the surroundings through the arc groove of the groove cover plate 101, and the circular hole of the orifice plate 106 is fixedly connected to the gas guide mechanism 2, and the groove cover plate 101 is fixedly installed on one end of the outer side of the fixed cover 105 close to the positioning cover 102, and arc grooves are evenly opened on the edge of the outer side of the groove cover plate 101.

[0035] The second embodiment is based on the first embodiment. Figure 6 to Figure 7 As shown, the air guide mechanism 2 includes a groove ring 21, and the outer side of the groove ring 21 is evenly provided with grooves, and the groove ring 21 is engaged with the inner buckle mechanism 3 through the grooves, and a buckle plate 22 is fixedly installed on the inner wall of the groove ring 21, and the buckle plate 22 is evenly installed along the center position of the groove ring 21. A connecting block 23 is fixedly installed on the end of the buckle plate 22 away from the groove ring 21, and is fixedly connected with the positioning mechanism 1 through a slide rod 25. After the detection probe is positioned and fixed, the slide rod 25 and the hole block 24 are slidably adapted, so that the detection personnel can drive the detection probe after pushing the positioning mechanism 1, so that it is restricted by the hole block 24 on the slide rod 25, and the detection probe is moved deep into the exhaust pipe, so that the detection probe penetrates into the exhaust pipe, and the buckle plate 22 is fixedly connected with the air guide cover 26 through the connecting block 23. The inner diameter of the air guide cover 26 becomes smaller as it gets closer to the positioning cover 102. The central axis of the air guide cover 26 is on the same straight line as the central axis of the positioning cover 102. A hole block 24 is fixedly installed on the inner wall of the groove ring 21. The hole block 24 is evenly installed along the center position of the groove ring 21, and the hole block 24 is located between the buckle plates 22. During detection, the exhaust gas is transmitted in the exhaust pipe and changes through the inner diameter of the air guide cover 26. After the exhaust gas enters the inside of the air guide cover 26, the exhaust gas is restricted by the air guide cover 26 to guide the flow toward the detection end of the detection probe. At the same time, the exhaust gas is conducted through the cooperation of the air guide cover 26 and the groove cover plate 101. A slide bar 25 is slidably installed on the inner wall of the hole block 24. The outer end of the slide bar 25 away from the hole block 24 is fixedly connected to the circular hole of the orifice plate 106.

[0036] The third embodiment is based on the first and second embodiments. Figures 8 to 9 As shown, the inner buckle mechanism 3 includes an outer cover ring 31, the inner wall of the outer cover ring 31 is fixedly installed with a clamping plate 32, the outer cover ring 31 is clamped with the clamping groove of the groove ring 21 through the clamping plate 32, and the outer side of the outer cover ring 31 is fixedly installed with a fixing block 34, the inner wall of the fixing block 34 is rotatably installed with a screw rod 33, and the outer side of the outer cover ring 31 is fixedly installed with a slide plate 35, and the slide plate 35 is evenly installed along the center position of the outer cover ring 31. When the auxiliary device is fixed inside the tailpipe through the inner buckle mechanism 3 After the auxiliary device is extended into the tailpipe, the screw rod 33 is rotated to limit the screw rod 33 under the restriction of the fixed block 34 on the outer side of the outer cover ring 31. The screw rod 33 is threadedly connected to the cambered block 39. During the rotation of the screw rod 33, the cambered block 39 is limited by the slide groove of the slide groove plate 35, so that the cambered block 39 can be closer to or farther away from each other when the screw rod 33 rotates in different directions through the threaded connection, and a slide groove is provided at the center of the top of the slide groove plate 35.

[0037] The top of the slide plate 35 is fixedly installed with a side plate 36, and the side plate 36 is symmetrically installed along the center position of the axis of the slide plate 35, and the outer side of the side plate 36 is provided with a through groove, and the through groove of the side plate 36 is slidably installed with a limit block 37, and an inner support block 38 is fixedly installed between the limit blocks 37. The top of the inner support block 38 is provided with a groove, and the edges on both sides of the bottom of the inner support block 38 are arc-shaped. The slide groove of the slide plate 35 is slidably installed with an arc block 39, and the arc block 39 is along the The axial center position of the slide groove is installed symmetrically. When fixed, the arc blocks 39 approach each other. The arc surfaces of the opposite surfaces of the arc blocks 39 contact the arc surfaces on both sides of the bottom of the inner support block 38 during the approach process. During the approach process, under the sliding restriction of the limit block 37 and the empty groove of the side plate 36, the inner support block 38 expands outward and contacts the inner wall of the exhaust pipe for fixation. The opposite surface of the arc block 39 is an arc surface, and the inner wall of the arc block 39 is threadedly connected to the outer side of the screw rod 33.

[0038] When in use, the auxiliary device is fixed inside the exhaust pipe by the inner buckle mechanism 3, and then the exhaust gas detection probe is fixed by the positioning mechanism 1 to position the probe. Then, the positioning mechanism 1 is pushed to drive the exhaust gas detection probe to move into the exhaust pipe under the restriction of the air guide mechanism 2. When the exhaust pipe discharges the exhaust gas, the exhaust gas outlet path is restricted by the air guide mechanism 2, so that the exhaust gas is concentrated and guided to the probe position.

[0039] When positioning the probe by the positioning mechanism 1, the detection end of the exhaust gas detection probe is inserted into the positioning mechanism 1, so that the probe passes through the arc clamp block 110, and the detection end of the probe is extended into the positioning cover 102, and the detection end of the detection probe is magnetically adsorbed by the magnetic ring 111 inside the positioning cover 102, and the detection end of the probe is positioned and fixed in cooperation with the positioning cover 102, and then the threaded ring 103 is rotated to make the threaded ring 103 connected with the threaded plate 104 according to the thread, so that the threaded ring 103 is close to the fixing ring 107, and in the process of the threaded ring 103 approaching the fixing ring 107, the threaded ring 103 is connected with the slip ring 112. The slip ring 112 is pushed toward the fixed ring 107 during the process of the slip ring 112 approaching along the threaded plate 104, and the elastic folding plate 109 is elastically deformed and bent, so that the center positions of the opposite surfaces of the elastic folding plate 109 are close to each other, and the arc clamping block 110 is driven to approach the center position to clamp and fix the outer side of the exhaust gas detection probe. At the same time, during the detection process, the groove cover plate 101 cooperates with the air guide mechanism 2 to make the exhaust gas conducted by the air guide mechanism 2 to the position of the probe. After being conducted to the detection end of the probe, the exhaust gas is guided by the groove cover plate 101, and the exhaust gas is conducted to the surroundings through the arc groove of the groove cover plate 101.

[0040] In the air guide mechanism 2, through the fixed connection between the slide rod 25 and the positioning mechanism 1, after the detection probe is positioned and fixed, through the sliding adaptation of the slide rod 25 and the hole block 24, the detection personnel can drive the detection probe after pushing the positioning mechanism 1, so that it is limited by the hole block 24 on the slide rod 25 and moves closer to the inside of the exhaust pipe, so that the detection probe penetrates into the exhaust pipe. At the same time, during the detection, the exhaust gas is transmitted in the exhaust pipe, and the inner diameter of the air guide cover 26 changes. After the exhaust gas enters the inside of the air guide cover 26, the exhaust gas is restricted by the air guide cover 26 to guide the exhaust gas to flow toward the detection end of the detection probe. At the same time, the exhaust gas is conducted through the cooperation of the air guide cover 26 and the slot cover plate 101.

[0041] When the auxiliary device is fixed inside the tail pipe by the inner buckle mechanism 3, after the auxiliary device is extended into the tail pipe, the screw rod 33 is rotated by rotating the screw rod 33 under the restriction of the fixed block 34 on the outside of the outer cover ring 31. The screw rod 33 is threadedly connected with the arc surface block 39. During the rotation of the screw rod 33, the arc surface block 39 is restricted by the slide groove of the slide groove plate 35, so that the arc surface block 39 can be rotated in different directions of the screw rod 33 through the threaded connection, and can be close to or away from each other. When fixed, the arc surface blocks 39 are close to each other, and the arc surfaces of the opposite surfaces of the arc surface blocks 39 contact the arc surfaces on both sides of the bottom of the inner support block 38 during the approach process. Therefore, during the approach process, under the sliding restriction of the limit block 37 and the empty groove of the side plate 36, the inner support block 38 expands outward and contacts the inner wall of the tail pipe for fixation.

[0042] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An auxiliary device for exhaust gas detection for assisting probe positioning, characterized in that: include: A positioning mechanism (1), the positioning mechanism (1) is used to fix the exhaust gas detection probe and to position the probe after the probe is inserted into the exhaust pipe; An air guide mechanism (2), the air guide mechanism (2) being used to guide the exhaust gas led out of the exhaust pipe to the probe position, the positioning mechanism (1) being installed inside the air guide mechanism (2); An inner buckle mechanism (3), the inner buckle mechanism (3) is used to support the inner wall of the tailpipe to fix the device to the tailpipe, and the inner buckle mechanism (3) is fixedly installed on the outer side of the air guide mechanism (2); The positioning mechanism (1) comprises a fixed cover (105), a positioning cover (102) is fixedly mounted on one end of the fixed cover (105), a magnetic ring (111) is fixedly mounted on the inner wall of the positioning cover (102), a fixed ring (107) is fixedly mounted on the other end of the fixed cover (105), a threaded plate (104) is fixedly mounted on the outer side of the fixed ring (107), the threaded plate (104) is evenly mounted along the center of the fixed ring (107), and a hollow groove is provided at the center of the outer side of the threaded plate (104), an elastic folding plate (109) is mounted at the hollow groove of the threaded plate (104), one end of the elastic folding plate (109) is fixedly connected to the hollow groove of the threaded plate (104), and the other end of the elastic folding plate (109) is fixedly connected to a slip ring (112), and the inner wall of the slip ring (112) is slidably adapted to the non-opposite surface of the threaded plate (104).

2. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 1, characterized in that: The outer side of the threaded plate (104) is threadedly connected to a threaded ring (103); a side of the threaded ring (103) close to the fixed ring (107) is in contact with the outer side of the slip ring (112); an end of the threaded plate (104) away from the fixed ring (107) is fixedly connected to a limiting disk (108); and an arc clamp block (110) is fixedly installed at the center position of the opposite surface of the elastic folding plate (109).

3. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 1, characterized in that: A perforated plate (106) is evenly mounted at the center of the outer side of the fixed cover (105); a circular hole is formed at one end of the outer side of the perforated plate (106) away from the fixed cover (105); and the circular hole of the perforated plate (106) is fixedly connected to the air guide mechanism (2); a grooved cover plate (101) is fixedly mounted at one end of the outer side of the fixed cover (105) close to the positioning cover (102); and arc grooves are evenly formed at the edge of the outer side of the grooved cover plate (101).

4. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 1, characterized in that: The air guide mechanism (2) comprises a groove ring (21), the outer side of the groove ring (21) is evenly provided with clamping grooves, the groove ring (21) is clamped with the inner buckle mechanism (3) through the clamping grooves, and a buckle plate (22) is fixedly installed on the inner wall of the groove ring (21), and the buckle plate (22) is evenly installed along the center position of the groove ring (21).

5. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 4, characterized in that: A connecting block (23) is fixedly mounted on one end of the pinch plate (22) away from the groove ring (21), and the pinch plate (22) is fixedly connected to an air guide cover (26) via the connecting block (23), wherein the inner diameter of the air guide cover (26) decreases as it approaches the positioning cover (102).

6. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 5, characterized in that: The central axis of the air guide cover (26) is on the same straight line as the central axis of the positioning cover (102); a hole block (24) is fixedly installed on the inner wall of the groove ring (21); the hole block (24) is evenly installed along the center position of the groove ring (21), and the hole block (24) is located between the buckle plates (22); a slide rod (25) is slidably installed on the inner wall of the hole block (24); the outer end of the slide rod (25) away from the hole block (24) is fixedly connected to the circular hole of the orifice plate (106).

7. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 1, characterized in that: The inner buckle mechanism (3) comprises an outer cover ring (31), a clamping plate (32) is fixedly mounted on the inner wall of the outer cover ring (31), the outer cover ring (31) is clamped with the clamping groove of the groove ring (21) via the clamping plate (32), and a fixing block (34) is fixedly mounted on the outer side of the outer cover ring (31).

8. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 7, characterized in that: A screw rod (33) is rotatably mounted on the inner wall of the fixed block (34), and a slide groove plate (35) is fixedly mounted on the outer side of the outer cover ring (31). The slide groove plate (35) is evenly mounted along the center position of the outer cover ring (31), and a slide groove is provided at the center position of the top of the slide groove plate (35).

9. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 8, characterized in that: A side plate (36) is fixedly mounted on the top of the slide plate (35). The side plates (36) are symmetrically mounted along the center of the axis of the slide plate (35), and through grooves are formed on the outer sides of the side plates (36).

10. The exhaust gas detection auxiliary device for assisting the positioning of the probe according to claim 9, characterized in that: The through grooves of the side plates (36) are slidably mounted with limit blocks (37), and inner support blocks (38) are fixedly mounted between the limit blocks (37). The top of the inner support block (38) is provided with a groove, and the edges on both sides of the bottom of the inner support block (38) are arc-shaped. The slide groove of the slide groove plate (35) is slidably mounted with an arc surface block (39), and the arc surface block (39) is symmetrically mounted along the center position of the axis of the slide groove, and the opposite surface of the arc surface block (39) is an arc surface, and the inner wall of the arc surface block (39) is threadedly connected to the outer side of the screw rod (33).

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