Exhaust emission on-line detection apparatus and method

Abstract

The application relates to the technical field of waste gas detection, and discloses waste gas emission on-line detection equipment and a method thereof, which comprises a detection device used for detecting the emission amount of waste gas in a pipeline, the detection device is protected by a plugging device, the plugging device is arranged at one end of the detection device inserted into the pipeline, the waste gas in the pipeline can be detected through the sliding of a detection probe in a shell, the sliding of the detection probe can simultaneously drive the plugging device and a sealing device to work, the linkage and tightness are good, the shell is opened and closed through the plugging device, the opening during work and the sealing during leisure are realized, the service life of the detection equipment is prolonged, the influence of residual particles on the next detection result is reduced, the shell and the probe are sealed through the sealing device, the stability of the detection equipment is ensured, the damage to the detection equipment is reduced, and the service life of the detection equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas detection technology, specifically to online exhaust gas emission detection equipment and methods. Background Technology

[0002] The improvement of the environment is directly linked to the future survival of humankind. To achieve human sustainability, environmental protection is essential. Therefore, the application of online monitoring of industrial organic waste gas is receiving increasing attention. By using a more intuitive and effective observation method, environmental conditions can be analyzed, and then the environmental remediation plan can be adjusted.

[0003] However, during the continuous operation of the detection equipment, fine particles from the exhaust gas will adhere to the probe that is always inserted into the pipe to be tested. After these particles have accumulated and adhered for a long time, they will cause errors in the detection data of the equipment. Therefore, it does not meet the existing requirements. To address this, we propose an online exhaust gas emission detection device and method. Summary of the Invention

[0004] This invention provides an online detection device and method for exhaust gas emissions, which has the beneficial effect of reducing the error of the detection device and solves the problem mentioned in the background art that the deposits on the probe affect the detection data of the detection device.

[0005] The present invention provides the following technical solution: an online exhaust gas emission detection device, including a detection device for detecting the amount of exhaust gas emitted into a pipeline, wherein the detection device is protected by a blocking device, and the blocking device is disposed at one end of the detection device inserted into the pipeline.

[0006] As an optional solution for the online exhaust emission monitoring device of the present invention, the monitoring device includes a housing, one end of which is inserted into the pipe, and a probe is slidably connected inside the housing. One end of the probe is fixedly connected to a connecting plate via a spring, and the connecting plate is fixedly connected inside the housing. The probe slides via a push rod, which is controlled by a gas piston.

[0007] As an optional solution for the online exhaust emission monitoring device of the present invention, the blocking device includes a blocking plate that slides within a blocking chamber. The blocking plate is fixedly connected to a wedge block via a second connecting rod. The second connecting rod slides within a first and a second sliding groove. The first sliding groove is located on one side of the blocking chamber, and the second sliding groove is located on the side wall of the pipe. The first and second sliding grooves are isolated from each other by an elastic sealing ring.

[0008] As an optional solution for the online exhaust emission monitoring device of the present invention, the blocking device is opened by a driving device disposed in the probe. The driving device includes a gas chamber, which is located inside the probe. A piston tube is fixedly connected to one side of the gas chamber. The piston tube is slidably connected in a third sliding groove, which is located on one side of the outer shell. The piston tube communicates with the gas chamber. The piston tube is driven by a first piston plate that slides in the gas chamber. The first piston plate is fixedly connected to the push rod. The first piston plate transmits pressure to a second piston plate that slides in the piston tube. A triangular driving block is fixedly connected to one side of the second piston plate via a first connecting rod. The first connecting rod passes through the piston tube. The triangular driving block drives the wedge to move. The driving device also includes a driving ring, which is fixedly connected to the inner wall of the gas chamber. The driving ring is used to drive the probe to move.

[0009] As an optional solution for the online exhaust emission detection equipment of the present invention, the blocking device achieves its blocking function through a venting device installed in the gas chamber. The venting device includes an exhaust hole opened on the side wall of the gas chamber, the exhaust hole being blocked by a blocking block. Magnets are fixedly connected to both sides of the blocking block, and the magnets are adsorbed onto the inner wall of the gas chamber. One end of the blocking block is fixedly connected to a second connecting plate via a second spring. The second connecting plate is fixedly connected to the inner wall of the gas chamber. An air pipe is opened inside the blocking block, and one side of the blocking block is designed with a slope.

[0010] As an optional solution for the online exhaust emission detection device of the present invention, wherein: the blockage block is driven by a control device, the control device includes a venting drive block, the venting drive block slides in a groove, one side of the venting drive block is an inclined surface, the groove is formed on the inner wall of the outer shell, a first slider is fixedly connected to the side wall of the venting drive block, the first slider is slidably connected in a fourth slide groove, the fourth slide groove is formed in the groove, the fourth slide groove is arc-shaped, and the first slider is elastically connected to one side of the fourth slide groove by a third spring.

[0011] As an optional solution for the online exhaust emission detection device of the present invention, the probe needs to be sealed with the outer shell through a sealing device during the detection process. The sealing device includes a sealing airbag, which is fixedly connected to the inside of one end of the outer shell, and one end of the sealing airbag is connected to a flexible tube.

[0012] As an optional solution for the online exhaust emission monitoring device of the present invention, wherein: the sealing airbag is inflated and deflated by a pneumatic device, the pneumatic device includes a cylinder, the cylinder is fixedly connected to the blockage chamber by a connecting column, a third piston plate is slidably connected inside the cylinder, the third piston plate divides the cylinder into a first space and a second space, the first space is connected to the sealing airbag by a hose, the third piston plate is slidably connected to a fifth slide groove by a second slider, the fifth slide groove is opened inside the cylinder, the third piston plate is driven by a drive rod, the drive rod passes through the blockage chamber, and the drive rod is fixedly connected to the blockage plate.

[0013] The method of using the online exhaust emission monitoring device of the present invention includes the following steps:

[0014] S1. The gas piston drives the push rod to move, and the push rod drives the probe to extend out of the housing. It also collects the waste gas in the pipeline. The push rod drives the first piston plate, causing the driving device to operate the blocking device.

[0015] S2. The driving device controls the blocking device to lift, opening one end of the housing. At the same time, the push rod pushes the probe to move, and when one end of the housing is no longer closed, the probe is pushed out. At this time, the lifting of the blocking plate drives the control device to work, inflating the sealing airbag to fill the gap between the housing and the probe.

[0016] S3. After the test is completed, the gas piston drives the push rod to reset, and the probe is reset under the action of the first spring. The gas collected by the probe is detected by the detection device. At this time, the blocking device re-blocks one end of the outer shell, and the sealing airbag is deflated, so that the probe can be reset smoothly.

[0017] S4. Simultaneously, under the control of the control device, the venting device releases the gas in the gas chamber, so that the triangular drive block controls the blocking device to complete the blocking.

[0018] The present invention has the following beneficial effects:

[0019] 1. The online exhaust gas emission detection equipment and method can detect exhaust gas in the pipeline by sliding the detection probe inside the housing. The sliding of the detection probe can simultaneously drive the blocking device and the sealing device to work, and has good tightness.

[0020] 2. The online exhaust gas emission detection equipment and method, through the blocking and opening of the outer shell by the blocking device, realizes opening during operation and sealing during rest, which improves the service life of the detection equipment and reduces the impact of residual particles on the next detection result.

[0021] 3. The online exhaust gas emission detection equipment and method, through the sealing device between the outer shell and the probe, ensures the stability of the detection equipment, reduces damage to the detection equipment, and improves the service life of the detection equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0024] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0025] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B.

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the internal structure of the groove.

[0027] Figure 6 For the present invention Figure 2 Enlarged structural diagram at point C.

[0028] In the diagram: 1. Detection device; 101. Housing; 102. Probe; 103. Spring No. 1; 104. Connecting plate No. 1; 105. Push rod; 106. Gas piston; 2. Pipeline; 3. Blocking device; 301. Blocking plate; 302. Blocking chamber; 303. Connecting rod No. 2; 304. Wedge; 305. Slide No. 1; 306. Slide No. 2; 307. Elastic sealing ring; 4. Drive device; 401. Gas chamber; 402. Piston tube; 403. Slide No. 3; 404. Piston plate No. 1; 405. Piston plate No. 2; 406. Connecting rod No. 1; 407. Triangular drive block; 408. Drive 5. Activated ring; 6. Venting device; 501. Vent hole; 502. Blocking block; 503. Magnet; 504. Spring No. 2; 505. Connecting plate No. 2; 506. Air pipe; 6. Control device; 601. Venting drive block; 602. Groove; 603. Slider No. 1; 604. Slide No. 4; 605. Spring No. 3; 7. Sealing device; 701. Sealing airbag; 702. Hose; 8. Pneumatic device; 801. Cylinder; 802. Connecting column; 803. Piston plate No. 3; 804. First space; 805. Second space; 806. Slider No. 2; 807. Slide No. 5; 808. Drive rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment aims to help resolve the problem of deposits on the probe affecting the detection data of the detection equipment. Please refer to [link to relevant documentation]. Figure 1-6 Online detection equipment and method for exhaust gas emissions, including detection device 1, which is used to detect the emission of exhaust gas in pipeline 2. The detection device 1 is protected by a blocking device 3, which is located at one end of the detection device 1 inserted into the pipeline 2.

[0032] In this embodiment, the online exhaust gas emission detection device includes a detection device 1. The detection device 1 includes a housing 101, one end of which is inserted into a pipe 2. A probe 102 is slidably connected inside the housing 101. One end of the probe 102 is fixedly connected to a connecting plate 104 via a spring 103. The connecting plate 104 is fixedly connected inside the housing 101. The probe 102 slides via a push rod 105, which is controlled by a gas piston 106. By inserting one end of the housing 101 into the pipe 2, the amount of exhaust gas emitted in the pipe 2 can be detected by the probe 102 sliding inside the housing 101. When the gas piston 106 does not apply power to the push rod 105, the spring 103 can quickly pull the probe 102 back into the housing 101 via the push rod 105. This allows the end of the housing 101 inserted into the pipe 2 to be sealed by a blocking device 3, preventing exhaust gas from the pipe 2 from entering the housing 101, contaminating the probe 102, and affecting the detection results.

[0033] In this embodiment: the blocking device 3 includes a blocking plate 301, which slides in the blocking chamber 302. The blocking plate 301 is fixedly connected to the wedge block 304 via a second connecting rod 303. The second connecting rod 303 slides in a first sliding groove 305 and a second sliding groove 306. The first sliding groove 305 is opened on one side of the blocking chamber 302, and the second sliding groove 306 is opened on the side wall of the pipe 2. The first sliding groove 305 and the second sliding groove 306 are isolated by an elastic sealing ring 307.

[0034] Depending on the state of the probe 102, the blocking plate 301 is controlled to slide up and down within the blocking chamber 302. The up and down sliding of the blocking plate 301 is synchronized with the second connecting rod 303 and the wedge 304. The wedge 304 is driven to move by the driving device 4, so that the second connecting rod 303 slides within the first sliding groove 305 and the second sliding groove 306, thereby driving the blocking plate 301 to slide up and down. When the probe 102 extends out of the outer shell 101 to perform detection work, the blocking plate 301 is raised so that the blocking plate 301 does not affect the detection work of the probe 102. When the probe 102 is retracted into the outer shell 101, the blocking plate 301 blocks the outer shell 101 to prevent the exhaust gas in the pipeline 2 from entering the outer shell 101, contaminating the probe 102, and affecting the detection results.

[0035] The first slide 305 and the second slide 306 are connected and sealed by the elastic sealing ring 307, so as to prevent the waste gas impurities in the pipe 2 from adhering to the surface of the second connecting rod 303 and affecting the sliding of the second connecting rod 303.

[0036] In this embodiment: the blocking device 3 is opened by a driving device 4 installed inside the probe 102. The driving device 4 includes an air chamber 401, which is located inside the probe 102. A piston tube 402 is fixedly connected to one side of the air chamber 401. The piston tube 402 is slidably connected to a third slide groove 403, which is located on one side of the outer casing 101. The piston tube 402 communicates with the air chamber 401. The piston tube 402 is driven by a first piston plate 404 that slides inside the air chamber 401. The first piston plate 404 is fixedly connected to a push rod 105. The first piston plate 404 transmits pressure to a second piston plate 405 that slides inside the piston tube 402. A triangular driving block 407 is fixedly connected to one side of the second piston plate 405 via a first connecting rod 406. The first connecting rod 406 passes through the piston tube 402. The triangular driving block 407 drives the wedge block 304 to move.

[0037] The drive device 4 also includes a drive ring 408, which is fixedly connected to the inner wall of the gas chamber 401. The drive ring 408 is used to drive the probe 102 to move. The push rod 105 drives the first piston plate 404 to squeeze the gas in the gas chamber 401, causing the second piston plate 405 in the piston tube 402 to slide and causing the triangular drive block 407 fixedly connected to it to rise. When the triangular drive block 407 rises to its limit, the first piston plate 404 abuts against the drive ring 408 and pushes the probe 102 to move. As the probe 102 moves, the piston tube 402 fixedly connected to the probe 102 is driven to slide synchronously on the third slide groove 403. The piston tube 402 drives the triangular drive block 407 to drive the wedge block 304 to slide, thereby opening the blockage plate 301 to the outer shell 101 so that the probe 102 can extend out of the outer shell 101 to detect the exhaust gas in the 2.

[0038] In this embodiment: the blocking device 3 achieves its blocking function through the venting device 5 installed inside the air chamber 401. The venting device 5 includes an exhaust hole 501 opened on the side wall of the air chamber 401, which is blocked by a blocking block 502. Magnets 503 are fixedly connected to both sides of the blocking block 502, and the magnets 503 are attracted to the inner wall of the air chamber 401. One end of the blocking block 502 is fixedly connected to a second connecting plate 505 through a second spring 504. The second connecting plate 505 is fixedly connected to the inner wall of the air chamber 401. An air pipe 506 is opened inside the blocking block 502. One side of 502 is designed with a slope. When the probe 102 is retracted into the housing 101, the blocking block 502 fixedly connected to the probe 102 moves synchronously, so that the blocking block 502 is driven to rise by the control device 6, so that the gas in the air chamber 401 is discharged through the air pipe 506 and the second spring 504 is compressed. At the same time, due to the loss of internal gas, the second piston plate 405 loses its support, so that the triangular drive block 407 loses its force on the wedge block 304, so as to control the descent of the blocking plate 301. The magnet 503 can enhance the blocking effect of the blocking block 502 on the exhaust port 501.

[0039] In this embodiment: the blocking block 502 is driven by the control device 6, which includes a venting drive block 601. The venting drive block 601 slides within the groove 602, and one side of the venting drive block 601 is an inclined surface. The groove 602 is formed on the inner wall of the outer shell 101. A first slider 603 is fixedly connected to the side wall of the venting drive block 601. The first slider 603 is slidably connected within a fourth slide groove 604, which is formed within the groove 602 and is arc-shaped. The first slider 603 is elastically connected to one side of the fourth slide groove 604 via a third spring 605. When the probe 102 extends out of the outer shell 101, the straight edge of the blocking block 502 abuts against the inclined surface of the venting drive block 601, causing the venting drive block 602 to... 1. By compressing the third spring 605 through the first slider 603, the venting drive block 601 is lowered, allowing the blocking block 502 to move without being raised. This prevents gas in the gas chamber 401 from flowing out through the exhaust port 501 and affecting the raising of the blocking plate 301. When the probe 102 is retracted into the housing 101, the inclined surface of the blocking block 502 abuts against the straight surface of the venting drive block 601, causing the venting drive block 601 to drive the blocking block 502 to rise and compress the second spring 504. This causes the blocking block 502 to slide on the top surface of the venting drive block 601. When it slides out of the venting drive block 601, the second spring 504 re-blocks the exhaust port 501, allowing the gas chamber 401 to be resealed for the next test.

[0040] In this embodiment: During the detection process, the probe 102 needs to be sealed with the outer shell 101 by the sealing device 7. The sealing device 7 includes a sealing airbag 701, which is fixedly connected to the inside of one end of the outer shell 101. One end of the sealing airbag 701 is connected to a hose 702. When the probe 102 is extended for detection, the sealing airbag 701 is inflated by the pneumatic device 8 to seal the connection between the probe 102 and the outer shell 101. This ensures that the sealing airbag 701 seals the connection between the probe 102 and the outer shell 101 during the detection process, preventing waste gas from the pipe 2 from entering the outer shell 101 and contaminating the probe 102. When the probe 102 is retrieved, the sealing airbag 701 is deflated by the pneumatic device 8 to reduce friction between the sealing airbag 701 and the probe 102, thereby extending the service life of the probe 102 and the sealing airbag 701.

[0041] In this embodiment: the sealing airbag 701 is inflated and deflated by a pneumatic device 8. The pneumatic device 8 includes a cylinder 801, which is fixedly connected to the blocking chamber 302 via a connecting column 802. A third piston plate 803 is slidably connected inside the cylinder 801. The third piston plate 803 divides the cylinder 801 into a first space 804 and a second space 805. The first space 804 is connected to the sealing airbag 701 via a hose 702. The third piston plate 803 is slidably connected to a fifth slide groove 807 via a second slider 806. The fifth slide groove 807 is opened inside the cylinder 801. The third piston plate 803 is driven by a drive rod 808, which passes through the blocking chamber 302 and is fixedly connected to the blocking plate 301.

[0042] When the probe 102 extends, the blocking plate 301 lifts the driving rod 808. When the driving rod 808 is lifted to the third piston plate 803, it continues to move against the third piston plate 803, causing the third piston plate 803 to transport the gas in the first space 804 through the hose 702 to the sealing airbag 701, causing the sealing airbag 701 to inflate. This allows the sealing airbag 701 to seal the connection between the probe 102 and the outer shell 101 during the detection process, preventing waste gas from the pipe 2 from entering the outer shell 101 and contaminating the probe 102. When the probe 102 is retracted, the blocking plate 301 drives the driving rod 808 to descend, causing the first space 804 to absorb gas from the sealing airbag 701, causing the sealing airbag 701 to deflate and contract. This reduces friction between the sealing airbag 701 and the probe 102, extending the service life of both the probe 102 and the sealing airbag 701.

[0043] This embodiment also provides a method for using an online exhaust gas emission monitoring device, including the following steps:

[0044] S1. The gas piston 106 drives the push rod 105 to move, and the push rod 105 drives the probe 102 to extend out of the outer shell 101 and collect the exhaust gas in the pipe 2. The push rod 105 drives the first piston plate 404, so that the driving device 4 drives the blocking device 3 to work.

[0045] S2, the drive device 4 controls the blocking device 3 to lift, so that one end of the housing 101 is opened. At the same time, the push rod 105 pushes the probe 102 to move, and when one end of the housing 101 is no longer closed, the probe 102 is pushed out. At this time, the lifting drive control device 6 of the blocking plate 301 works to inflate the sealing airbag 701 and fill the gap between the housing 101 and the probe 102.

[0046] S3. After the test is completed, the gas piston 106 drives the push rod 105 to reset, and the probe 102 is reset under the action of the first spring 103. The gas collected by the probe 102 is detected by the detection device. At this time, the blocking device 3 re-blocks one end of the outer shell 101, and the sealing airbag 701 is released, so that the probe 102 is successfully reset.

[0047] S4. At the same time, under the action of the control device 6, the venting device 5 releases the gas in the gas chamber 401, so that the triangular drive block 407 controls the blocking device 3 to complete the blocking.

[0048] Working principle:

[0049] The gas piston 106 pushes the first piston plate 404 to move and compress the gas in the gas chamber 401 through the push rod 105, so that the second piston plate 405 drives the triangular drive block 407 to abut against the wedge block 304 and lift. At this time, the wedge block 304 drives the blocking plate 301 to start to lift to a certain height.

[0050] The continuous movement of the push rod 105 causes the first piston plate 404 to contact the drive ring 408 and drive the probe 102 to start moving until the probe 102 is fully extended. The movement of the probe 102 drives the piston tube 402 to move, and at the same time drives the triangular drive block 407 to start sliding. The sliding of the triangular drive block 407 drives the wedge block 304 to continue to rise, and drives the third piston plate 803 to rise through the drive rod 808, so that the gas in the first space 804 is delivered to the sealing airbag 701, which is inflated to block the gap between the outer shell 101 and the probe 102.

[0051] When the gas piston 106 controls the push rod 105 to retract, the probe 102 is driven to return to its original position by the first spring 103. At this time, the inclined surface of the blocking block 502 at the bottom of the probe 102 abuts against the venting drive block 601, causing the blocking block 502 to rise and discharge the gas in the gas chamber 401 through the gas pipe 506. At this time, the triangular drive block 407 descends until the blocking block 502 completely slides away from the venting drive block 601. Simultaneously, the blocking plate 301 begins to descend until the blocking plate 301 completely blocks the outer casing 101, and the gas is discharged through the third piston plate 8. 03 The gas inside the sealing airbag 701 is absorbed into the first space 804. At this time, the sealing airbag 701 releases gas at the same time as the gas chamber 401 releases gas, so that the sealing airbag 701 no longer expands, so that there is no friction between the sealing airbag 701 and the probe 102. This prevents friction between the sealing airbag 701 and the probe 102 when the probe 102 moves, reduces the service life of the sealing airbag 701 and the probe 102, and facilitates the recovery of the probe 102. Secondly, the movement of the probe 102 causes the blocking plate 301 to block the outer shell 101.

[0052] The above-described operation enables real-time protection of the probe 102, ensuring its normal operation and protecting the stability and sealing of the internal components of the device. When the probe 102 is no longer needed for testing, it can be retrieved by blocking the outer casing 101 with the blocking device 3, thus protecting the probe 102 from damage.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An online emission monitoring device for exhaust gas, comprising a monitoring unit (1), characterized in that: The detection device (1) is used to detect the amount of exhaust gas emitted in the pipe (2). The detection device (1) is protected by a blocking device (3). The blocking device (3) is located at one end of the detection device (1) inserted into the pipe (2). The detection device (1) includes a housing (101), one end of which is inserted into the pipe (2). A probe (102) is slidably connected inside the housing (101). One end of the probe (102) is fixedly connected to a connecting plate (104) via a spring (103). The connecting plate (104) is fixedly connected inside the housing (101). The probe (102) slides via a push rod (105), which is controlled by a gas piston (106). The blocking device (3) includes a blocking plate (301), which slides in the blocking chamber (302). The blocking plate (301) is fixedly connected to the wedge (304) via a second connecting rod (303). The second connecting rod (303) slides in a first sliding groove (305) and a second sliding groove (306). The first sliding groove (305) is located on one side of the blocking chamber (302), and the second sliding groove (306) is located on the side wall of the pipe (2). The first sliding groove (305) and the second sliding groove (306) are isolated by an elastic closing ring (307). The blocking device (3) is opened by a driving device (4) located inside the probe (102). The driving device (4) includes an air chamber (401) located inside the probe (102). A piston tube (402) is fixedly connected to one side of the air chamber (401). The piston tube (402) is slidably connected to a third slide groove (403) located on one side of the outer casing (101). The piston tube (402) communicates with the air chamber (401). The piston tube (402) is driven by a first piston plate (404) sliding inside the air chamber (401). The stopper plate (404) is fixedly connected to the push rod (105). The first piston plate (404) transmits pressure to the second piston plate (405) which is slidably connected in the piston tube (402). A triangular drive block (407) is fixedly connected to one side of the second piston plate (405) through the first connecting rod (406). The first connecting rod (406) passes through the piston tube (402). The triangular drive block (407) drives the wedge block (304) to move. The driving device (4) also includes a drive ring (408). The drive ring (408) is fixedly connected to the inner wall of the air chamber (401). The drive ring (408) is used to drive the probe (102) to move.

2. The online exhaust gas emission detection device according to claim 1, characterized in that: The blocking device (3) achieves its blocking function through the venting device (5) set in the air chamber (401). The venting device (5) includes an exhaust hole (501) opened on the side wall of the air chamber (401). The exhaust hole (501) is blocked by a blocking block (502). Magnets (503) are fixedly connected to both sides of the blocking block (502). The magnets (503) are adsorbed on the inner wall of the air chamber (401). One end of the blocking block (502) is fixedly connected to the second connecting plate (505) through a second spring (504). The second connecting plate (505) is fixedly connected to the inner wall of the air chamber (401). An air pipe (506) is opened in the blocking block (502). One side of the blocking block (502) is designed as a slope.

3. The online exhaust gas emission detection device according to claim 2, characterized in that: The blockage block (502) is driven by the control device (6), which includes a venting drive block (601). The venting drive block (601) slides in the groove (602). One side of the venting drive block (601) is an inclined surface. The groove (602) is opened on the inner wall of the outer shell (101). A first slider (603) is fixedly connected to the side wall of the venting drive block (601). The first slider (603) is slidably connected in the fourth slide groove (604). The fourth slide groove (604) is opened in the groove (602). The fourth slide groove (604) is arc-shaped. The first slider (603) is elastically connected to one side of the fourth slide groove (604) through a third spring (605).

4. The online exhaust gas emission detection device according to claim 3, characterized in that: During the detection process, the probe (102) needs to be sealed between the probe (102) and the outer shell (101) by a sealing device (7). The sealing device (7) includes a sealing airbag (701), which is fixedly connected to the inside of one end of the outer shell (101). One end of the sealing airbag (701) is connected to a flexible tube (702).

5. The online exhaust gas emission detection device according to claim 4, characterized in that: The sealing airbag (701) is inflated and deflated by a pneumatic device (8). The pneumatic device (8) includes a cylinder (801), which is fixedly connected to the blocking chamber (302) via a connecting column (802). A third piston plate (803) is slidably connected inside the cylinder (801), dividing the cylinder (801) into a first space (804) and a second space (805). The first space (804) The third piston plate (803) is connected to the sealing airbag (701) through the hose (702). The third piston plate (803) is slidably connected to the fifth slide groove (807) through the second slider (806). The fifth slide groove (807) is opened in the cylinder (801). The third piston plate (803) is driven by the drive rod (808). The drive rod (808) passes through the blocking chamber (302). The drive rod (808) is fixedly connected to the blocking plate (301).

6. A method of using the online exhaust gas emission monitoring device as described in claim 5, characterized in that: Includes the following steps: S1. The gas piston (106) drives the push rod (105) to move, and through the push rod (105) drives the probe (102) to extend out of the outer shell (101) and collect the waste gas in the pipe (2). The push rod (105) drives the first piston plate (404) so ​​that the driving device (4) drives the blocking device (3) to work. S2. The driving device (4) controls the blocking device (3) to lift, so that one end of the outer shell (101) is opened. At the same time, the push rod (105) pushes the probe (102) to move. When one end of the outer shell (101) is no longer closed, the probe (102) is pushed out. At this time, the lifting of the blocking plate (301) drives the control device (6) to work, so that the sealing airbag (701) is inflated to fill the gap between the outer shell (101) and the probe (102). S3. After the test is completed, the gas piston (106) drives the push rod (105) to reset, and the probe (102) is reset under the action of the first spring (103). The gas collected by the probe (102) is tested by the testing equipment. At this time, the blocking device (3) re-blocks one end of the outer shell (101), and the sealing airbag (701) releases gas, so that the probe (102) is successfully reset. S4. At the same time, the venting device (5) releases the gas in the gas chamber (401) under the action of the control device (6), so that the triangular drive block (407) controls the blocking device (3) to complete the blocking.

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