Waste gas detection equipment

Abstract

The invention belongs to the technical field of waste gas detection, and particularly relates to waste gas detection equipment which comprises a detection box. A waste gas analyzer is mounted at the top of the detection box; a detection probe is mounted at the bottom of the waste gas analyzer; a detection cylinder is arranged in the middle of the detection box; a mounting block is fixedly connected to an inner cavity of the detection cylinder and located at the top of the detection cylinder; an air outlet assembly is arranged below the mounting block; two guide cylinders, namely a first guide cylinder and a second guide cylinder, are fixedly connected to two sides of the detection cylinder; air grooves are formed in the two sides of the mounting block and located in the side wall of the detection cylinder. An air pump is arranged below the first guide cylinder in an initial state and is positioned at the bottom of the detection box; a circular groove is formed in the lower part of the second guide cylinder in an initial state; a collecting assembly is mounted in the circular groove; by arranging the guide cylinder and the detection cylinder, residual gas in the detection box can be discharged, and the situation that newly sucked waste gas is mixed with original waste gas, and consequently the waste gas detection precision is affected is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of exhaust gas detection, in particular to an exhaust gas detection device. Background Art

[0002] Waste gas detection is an important means of protecting the environment and human health, and its necessity cannot be ignored. First, waste gas detection can help us understand the types and concentrations of harmful waste gas substances in the environment, and then evaluate their potential risks to the environment and human body. Secondly, waste gas detection can grasp the situation of waste gas emissions from enterprises, so as to timely discover and solve possible pollution problems and ensure that the production process of enterprises meets environmental protection requirements;

[0003] The content of waste gas detection includes waste gas outlet monitoring and waste gas composition analysis. Waste gas outlet monitoring mainly involves continuous online monitoring of the waste gas outlet of the enterprise to obtain real-time waste gas emission data. Waste gas composition analysis involves periodic detection of waste gas to determine the types and concentrations of various harmful substances in the waste gas.

[0004] Existing exhaust gas detection equipment mainly uses an air pump to draw external gas into the air pipe. After the exhaust gas is filtered, it will contact the detection probe to detect the exhaust gas and display it on the screen of the exhaust gas analyzer;

[0005] However, when the exhaust gas is tested periodically, some gas and gas residues will remain in the pipeline. When the exhaust gas is tested again, the newly drawn in exhaust gas will mix with the original exhaust gas, thus affecting the accuracy of the exhaust gas detection. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes an exhaust gas detection device. By setting a guide tube and a detection tube, the residual gas in the detection box can be discharged to prevent the newly drawn exhaust gas from mixing with the original exhaust gas, thereby affecting the accuracy of exhaust gas detection; the specific structural design of the present invention is as follows:

[0007] An exhaust gas detection device comprises a detection box; an exhaust gas analyzer is installed on the top of the detection box; a detection probe is installed at the bottom of the exhaust gas analyzer, and the detection probe extends into the detection box and is rotatably connected to the detection box; a mounting back plate is installed on the detection box, and the mounting back plate is used to install the detection box at a desired position;

[0008] A detection cylinder is provided in the middle of the detection box; the bottom of the detection cylinder is closed, and the top and bottom of the detection cylinder are both in contact with the top and bottom of the inner cavity of the detection box;

[0009] The inner cavity of the detection cylinder is fixedly connected to a mounting block at the top of the detection cylinder, and the detection probe passes through the mounting block and is rotatably connected to the mounting block;

[0010] An air outlet component is provided below the mounting block, and the air outlet component is used to guide the exhaust gas after detection; a through hole is provided on the bottom of the air outlet component located on the detection box;

[0011] Two guide tubes are fixedly connected to both sides of the detection tube, namely the first guide tube and the second guide tube; the tops of the two guide tubes are closed, and the bottoms are in contact with the bottom of the inner cavity of the detection box;

[0012] The outer ring surfaces of the two guide cylinders are fixedly connected with drive rings, and the outer ring surfaces of the drive rings are provided with evenly arranged tooth grooves; the drive rings rotate in the detection box; a motor is installed on the top of the detection box, and a gear is installed on the motor; the gear extends into the detection box and meshes with the tooth grooves on the drive rings;

[0013] Gas grooves are provided on the side walls of the detection cylinder on both sides of the mounting block; one-way valves are installed in the two gas grooves, and the gas in the two flow guide cylinders can only enter the detection cylinder;

[0014] An air pump is provided below the first guide tube in the initial state and at the bottom of the detection box, and an air outlet pipe of the air pump is connected to the first guide tube;

[0015] A circular groove is provided below the second guide cylinder in the initial state; a collecting assembly is installed in the circular groove, and the collecting assembly is used to collect impurities;

[0016] The two guide cylinders are both slidably connected with a first disc; the top of each of the first discs is fixedly connected with a first spring, and the other end of the first spring is connected to the top of the guide cylinder;

[0017] A filter assembly is provided at the bottom of the two first discs, and the filter assembly is used to filter impurities in the exhaust gas.

[0018] Preferably, the filter assembly includes a slip ring, and the first disc is in contact with the slip ring in an initial state; the two slip rings slide in the two guide cylinders respectively and are located below the first disc;

[0019] A first filter screen is installed in the middle of the two slip rings, and in the initial state, the first filter screen is in contact with the bottom surface of the inner cavity of the detection box;

[0020] Two guide rods are fixedly connected to the top of the slip ring, and both guide rods pass through the first disc above; and conical blocks are fixedly connected to the top of the guide rods.

[0021] Preferably, the collecting assembly comprises a collecting cylinder; the collecting cylinder is installed in the circular groove;

[0022] A bottom cover is installed at the bottom of the collecting cylinder, and the bottom cover and the collecting cylinder are installed by threads; a second filter screen is installed on the bottom cover;

[0023] A horizontal plate is installed at the top of the collecting cylinder; a turbine is installed on the horizontal plate; brushes are fixedly connected to the blades of the turbine;

[0024] A motor can be installed at the bottom of the transverse plate, and the motor is used to drive the turbine to rotate.

[0025] Preferably, the top of the first disc is covered with iron sheet; the conical block is a magnetic block, and when the second spring returns to an initial state, it pushes the first disc to separate from the conical block.

[0026] Preferably, the circular groove is provided with threads; the outer ring surface of the collecting tube is also provided with threads, and the collecting tube and the circular groove are installed by threads.

[0027] Preferably, the gas outlet assembly includes a second disc; the second disc is located below the mounting block and slides in the detection cylinder;

[0028] A second spring is fixedly connected to the bottom of the second disc, and the other end of the second spring is fixedly connected to the bottom of the detection cylinder;

[0029] Two first air pipes are installed in the second disc, and the top of the first air pipe is connected with the space above the second disc; the bottom of the first air pipe passes through the bottom of the detection cylinder and is slidably connected with the detection cylinder, and then the first air pipe passes through the through hole;

[0030] The air intake of the air groove is greater than the air output of the two first air pipes;

[0031] A one-way valve is installed in the first air pipe, and the gas above the second disc can only enter the first air pipe.

[0032] Preferably, a cylindrical groove is provided in the middle of the two first air pipes and located in the second disc;

[0033] A second air pipe is slidably connected in the cylindrical groove, and the second air pipe passes through the bottom of the detection cylinder and is slidably connected to the detection cylinder, and then the second air pipe passes through the through hole;

[0034] The top of the second air pipe is closed; a groove is provided on the top of the second air pipe, and the head of the detection probe is located in the groove in an initial state;

[0035] The side wall of the second air pipe is provided with evenly arranged air ports, and the air ports are located inside the second disc in the disposed state;

[0036] Two limiting plates are fixedly connected to the outer ring surface of the second air pipe below the air port.

[0037] Preferably, an oblique groove is provided on the side wall of the detection tube above the two gas grooves; the two oblique grooves extend into the mounting block, penetrate the mounting block, and extend to the bottom of the mounting block;

[0038] The two inclined grooves are slidably connected with inclined rods; a sliding groove is provided in the mounting block on the opposite side of the two inclined rods; a sliding block is fixedly connected to the two inclined rods, and the sliding block slides in the sliding groove;

[0039] The slider is fixedly connected with a third spring, and the other end of the third spring is fixedly connected in the slide groove. In the initial state, the top parts of the two inclined rods extend into the guide tube, and the bottoms of the inclined rods do not extend from the mounting block.

[0040] The beneficial effects of the present invention are as follows:

[0041] 1. The exhaust gas detection device described in the present invention is provided with an exhaust gas outlet component. When the exhaust gas detection is completed, the exhaust gas component can discharge the gas in the detection cylinder. In this process, the gas after the detection can be prevented from remaining in the detection cylinder. When the detection is performed again, the newly drawn in exhaust gas will be mixed with the original exhaust gas, which will affect the accuracy of the exhaust gas detection. At the same time, the two guide cylinders are controlled to rotate, and the guide cylinder with residual gas can be rotated to above the circular groove, and then the part of the gas is discharged from the guide cylinder. At the same time, the guide cylinder without residual gas is transferred to the top of the air pump, so that the two guide cylinders can be recycled and the gas in the guide cylinder after use can be discharged, so as to avoid the existence of exhaust gas in the guide cylinder, resulting in the newly drawn in exhaust gas being mixed with the original exhaust gas, which will affect the accuracy of the exhaust gas detection.

[0042] 2. In the exhaust gas detection equipment described in the present invention, when the slip ring fits with the bottom surface of the inner cavity of the detection box and the first disc continues to push the gas downward, the gas will pass through the first filter from the upper downward direction, and some impurities attached to the bottom of the first filter can be blown off, and the fallen impurities will follow the gas into the collecting tube, and at the same time, when the gas passes through the first filter and passes through the turbine, it will blow the turbine to rotate, and at the same time, the turbine will drive the brush to rotate, and the rotating brush will clean the bottom surface of the first filter, so that the impurities at the bottom of the first filter can be swept off, thereby further reducing the impurities at the bottom of the first filter, avoiding the first filter from filtering the exhaust gas for a long time and causing the impurities to block the first filter, and at the same time, during the rotation of the turbine, the exhaust gas remaining above the turbine can be drawn into the collecting tube, thereby speeding up the exhaust gas discharge speed and avoiding the exhaust gas remaining above the turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] Figure 1 is a three-dimensional diagram of the detection box of the present invention;

[0045] Figure 2 It is the internal structure diagram of the detection box of the present invention;

[0046] Figure 3 is an exploded view of the detection box of the present invention;

[0047] Figure 4 The present invention Figure 3 A partial enlarged view of the middle part;

[0048] Figure 5 is a top view of the detection box of the present invention;

[0049] Figure 6 The present invention Figure 5 Cross-sectional view of the BB section when the middle test box is testing exhaust gas;

[0050] Figure 7 The present invention Figure 6 A partial enlarged view of point C in the middle;

[0051] Figure 8 The present invention Figure 6 A partial enlarged view of point D in the middle;

[0052] Fig. 9 The present invention Figure 5 Cross-sectional view at BB when the exhaust gas is discharged from the guide tube in the middle detection box;

[0053] Fig.10 The present invention Fig. 9 A partial enlarged view of point E in the middle.

[0054] In the figure: 1. detection box; 101. exhaust gas analyzer; 11. detection probe; 12. drive ring; 13. motor; 14. gear; 15. air pump; 16. circular groove; 17. through hole; 2. detection cylinder; 21. mounting block; 22. air groove; 31. first guide cylinder; 32. second guide cylinder; 33. first disc; 34. slip ring; 35. first filter; 36. guide rod; 37. conical block; 4. collecting cylinder; 41. bottom cover; 42. second filter; 43. turbine; 44. brush; 5. second disc; 51. first air pipe; 52. second air pipe; 53. air port; 54. groove; 55. limit plate; 6. inclined groove; 61. inclined rod; 62. slider; 63. slide groove. DETAILED DESCRIPTION

[0055] 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.

[0056] Embodiment 1: Figures 1 to 10As shown, an exhaust gas detection device according to the present invention comprises a detection box 1; an exhaust gas analyzer 101 is installed on the top of the detection box 1; a detection probe 11 is installed at the bottom of the exhaust gas analyzer 101, and the detection probe 11 extends into the detection box 1 and is rotatably connected to the detection box 1; a mounting back plate is installed on the detection box 1, and the mounting back plate is used to install the detection box 1 at a desired position;

[0057] A detection cylinder 2 is provided in the middle of the detection box 1; the bottom of the detection cylinder 2 is closed, and the top and bottom of the detection cylinder 2 are both in contact with the top and bottom of the inner cavity of the detection box 1;

[0058] The inner cavity of the detection cylinder 2 is fixedly connected with a mounting block 21 at the top of the detection cylinder 2, and the detection probe 11 passes through the mounting block 21 and is rotatably connected to the mounting block 21;

[0059] An air outlet assembly is provided below the mounting block 21, and the air outlet assembly is used to guide the exhaust gas after detection; a through hole 17 is provided on the bottom of the air outlet assembly located on the detection box 1;

[0060] Two guide tubes are fixedly connected to both sides of the detection tube 2, namely a first guide tube 31 and a second guide tube 32; the tops of the two guide tubes are closed, and the bottoms are in contact with the bottom of the inner cavity of the detection box 1;

[0061] The outer ring surfaces of the two guide cylinders are fixedly connected with a driving ring 12, and the outer ring surfaces of the driving ring 12 are provided with evenly arranged tooth grooves; the driving ring 12 rotates in the detection box 1; a motor 13 is installed on the top of the detection box 1, and a gear 14 is installed on the motor 13; the gear 14 extends into the detection box 1 and meshes with the tooth grooves on the driving ring 12;

[0062] Gas grooves 22 are provided on the side walls of the detection cylinder 2 on both sides of the mounting block 21; one-way valves are installed in the two gas grooves 22, and the gas in the two flow guide cylinders can only enter the detection cylinder 2;

[0063] Under the first guide tube 31 in the initial state, an air pump 15 is provided at the bottom of the detection box 1, and the air outlet pipe of the air pump 15 is connected to the first guide tube 31;

[0064] A circular groove 16 is provided below the second guide cylinder 32 in the initial state; a collecting assembly is installed in the circular groove 16, and the collecting assembly is used to collect impurities;

[0065] The first disc 33 is slidably connected inside the two guide cylinders; the top of the first disc 33 is fixedly connected to a first spring, and the other end of the first spring is connected to the top of the guide cylinder;

[0066] The bottom of the two first discs 33 is provided with a filter assembly, and the filter assembly is used to filter impurities in the exhaust gas;

[0067] In this embodiment, the filter assembly includes a slip ring 34, and the first disc 33 is in contact with the slip ring 34 in the initial state; the two slip rings 34 slide in the two guide cylinders respectively and are located below the first disc 33;

[0068] A first filter screen 35 is installed in the middle of the two slip rings 34. In the initial state, the first filter screen 35 is in contact with the bottom surface of the inner cavity of the detection box 1.

[0069] Two guide rods 36 are fixedly connected to the top of the slip ring 34, and the guide rods 36 pass through the first disc 33 above; the tops of the guide rods 36 are fixedly connected to a conical block 37;

[0070] Specifically, when the exhaust gas is detected in stages, the air pump 15 is controlled to start. After the air pump 15 is started, the external gas can be drawn into the air pump 15, and then the gas is blown into the first guide tube 31. As the gas gradually enters the first guide tube 31, the gas in the first guide tube 31 gradually increases, thereby pushing the first disc 33 to gradually move upward in the first guide tube 31. At the same time, the first disc 33 will slide on the guide rod 36. When the first disc 33 is in contact with the conical block 37, the first disc 33 will push the conical block 37 to move upward. The upward conical block 37 will drive the guide rod 36, the slip ring 34 and the first filter screen 35 fixedly connected to the middle part of the slip ring 34 to move upward. As the first disc 33 gradually moves upward, the first disc 33 will gradually compress the first spring. In the process of the first disc 33 moving upward, it will gradually move from the position of the air groove 22 through the first spring. However, when the first disc 33 moves up to the top of the gas groove 22, the conical block 37 just contacts the top of the first guide cylinder 31, and the slip ring 34 and the first filter 35 in the middle of the slip ring 34 are located below the gas groove 22. Therefore, the gas entering the first guide cylinder 31 will first pass through the first filter 35, and the first filter 35 can filter the passing exhaust gas. The filtered gas will enter the detection cylinder 2 through the one-way valve in the gas groove 22. When the gas gradually enters the detection cylinder 2, as the gas in the detection cylinder 2 gradually increases, the gas outlet component will be pushed downward. At the same time, the gas entering the detection cylinder 2 will first pass through the detection probe 11, and then be led out from the gas outlet component. When the gas passes through the detection probe 11, the detection probe 11 can detect the passing exhaust gas and display the detected data on the exhaust gas analyzer 101.

[0071] More specifically, when the exhaust gas detection is completed, the air pump 15 is controlled to stop pumping, and the motor 13 is controlled to start. The motor 13 will drive the gear 14 to rotate, and the gear 14 will drive the drive ring 12 to rotate in the detection box 1. At the same time, the drive ring 12 will drive the two guide tubes and the detection tube 2 to rotate with the detection probe 11 as the center. During the rotation of the two guide tubes, the first guide tube 31 is gradually offset from the air outlet pipe of the air pump 15, and the second guide tube 32 is also gradually offset from the circular groove 16. When the first guide tube 31 is completely offset from the air pump 15, the bottom of the first guide tube 31 is in contact with the bottom surface of the inner cavity of the detection box 1, so that the gas can be sealed in the first guide tube 31 to prevent the gas from flowing out from the bottom of the first guide tube 31.

[0072] At the same time, during the rotation of the detection tube 2, the gas outlet assembly will gradually move up and gradually return to the initial position. Since the one-way valve installed in the gas groove 22 can only take in air, the gas remaining above the gas outlet assembly will be discharged through the gas outlet assembly. In this process, it can prevent the gas after detection from remaining in the detection tube 2. When the detection is performed again, the newly drawn in exhaust gas will be mixed with the original exhaust gas, which will affect the accuracy of exhaust gas detection.

[0073] Further, after the driving ring 12 rotates 180 degrees, the driving ring 12 is controlled to stop rotating. At this time, the two guide tubes and the detection tube 2 also rotate 180 degrees. The first guide tube 31 originally located above the air pump 15 rotates to above the circular groove 16. When the first guide tube 31 coincides with the circular groove 16, under the action of the first spring, the first disc 33 in the first guide tube 31 will be pushed down. The first disc 33 that moves down will push the gas below to move down. The gas that moves down will pass through the circular groove 16 and then enter the collection component. At this time, the gas outlet component has blocked the gas groove 22, so as to prevent the gas from entering the detection tube 2 through the gas groove 22. When the first filter screen 35 in the first guide tube 31 moves down to the initial position and fits with the bottom surface of the inner cavity of the detection box 1, the original gas in the first guide tube 31 will be discharged from the first guide tube 31.

[0074] Furthermore, after the two guide cylinders rotate 180 degrees, the second guide cylinder 32 originally located above the circular groove 16 rotates to above the air pump 15. Since the first filter 35 in the second guide cylinder 32 is in contact with the bottom surface of the inner cavity of the detection box 1 in the initial state, there is no residual gas in the second detection cylinder 2 at this time. When the exhaust gas is detected again, the air pump 15 is controlled to start and the gas is pumped into the second guide cylinder 32, and the above operation is repeated;

[0075] By setting up a gas outlet component, when the exhaust gas detection is completed, the exhaust gas component can discharge the gas in the detection cylinder 2. In this process, the gas after detection can be prevented from remaining in the detection cylinder 2. When detecting again, the newly drawn in exhaust gas will be mixed with the original exhaust gas, which will affect the accuracy of the exhaust gas detection. At the same time, the two guide cylinders are controlled to rotate, and the guide cylinder with residual gas can be rotated to above the circular groove 16, and then the part of the gas is discharged from the guide cylinder, and the guide cylinder with no residual gas is transferred to above the air pump 15, so that the two guide cylinders can be recycled and the gas in the guide cylinder after use can be discharged, so as to avoid the existence of exhaust gas in the guide cylinder, resulting in the newly drawn in exhaust gas being mixed with the original exhaust gas, which will affect the accuracy of the exhaust gas detection.

[0076] Embodiment 2: The collecting assembly includes a collecting cylinder 4; the collecting cylinder 4 is installed in the circular groove 16;

[0077] A bottom cover 41 is installed at the bottom of the collecting cylinder 4, and the bottom cover 41 and the collecting cylinder 4 are installed by threads; a second filter screen 42 is installed on the bottom cover 41;

[0078] A horizontal plate is installed at the top of the collecting cylinder 4; a turbine 43 is installed on the horizontal plate; brushes 44 are fixedly connected to the blades of the turbine 43;

[0079] A motor may be installed at the bottom of the horizontal plate, and the motor is used to drive the turbine 43 to rotate;

[0080] In this embodiment, the top of the first disc 33 is covered with iron sheet; the conical block 37 is a magnetic block, and when the second spring returns to the initial state, it pushes the first disc 33 away from the conical block 37;

[0081] In this embodiment, the circular groove 16 is provided with threads; the outer surface of the collecting tube 4 is also provided with threads, and the collecting tube 4 and the circular groove 16 are installed by threads;

[0082] Specifically, when the first disc 33 moves up to fit with the conical block 37, the first disc 33 will be adsorbed on the conical block 37. When the exhaust gas detection is completed, the two guide cylinders are controlled to rotate. When the guide cylinder of the residual exhaust gas rotates to the top of the circular groove 16 and overlaps with the circular groove 16, the first disc 33 will be driven to move down under the push of the first spring. Since the first disc 33 is adsorbed on the conical block 37, the conical block 37, the slip ring 34 and the first filter 35 will be driven to move down. In the process of the first disc 33 moving down, the gas will be pushed into the collection cylinder 4 through the circular groove 16.

[0083] More specifically, when the slip ring 34 moves down to the bottom surface of the inner cavity of the detection box 1, the slip ring 34 will fit with the bottom surface of the inner cavity of the detection box 1. At this time, the slip ring 34 will no longer move down due to the obstruction of the detection box 1. At the same time, the first filter 35 will contact the brush 44 on the turbine 43, and the first disc 33 will continue to move down under the push of the first spring and separate from the conical block 37. When the first disc 33 separates from the conical block 37, it will push the gas between the first filter 35 and the first disc 33 to move down. In the process of moving down, this part of the gas will pass downward from the top of the first filter 35. When the gas passes through, some impurities attached to the bottom of the first filter 35 can be blown off, and the fallen impurities The gas will follow the gas into the collecting tube 4. At the same time, when the gas passes through the first filter 35 and passes through the turbine 43, the turbine 43 will be blown to rotate. At the same time, the turbine 43 will drive the brush 44 to rotate. The rotating brush 44 will clean the bottom surface of the first filter 35, so that the impurities at the bottom of the first filter 35 can be swept off, thereby further reducing the impurities at the bottom of the first filter 35, avoiding the first filter 35 from filtering the exhaust gas for a long time, so that the impurities block the first filter 35. At the same time, during the rotation of the turbine 43, the exhaust gas remaining above the turbine 43 can be drawn into the collecting tube 4, thereby accelerating the exhaust gas discharge speed and avoiding the exhaust gas remaining above the turbine 43.

[0084] More specifically, a motor may be installed at the bottom of the horizontal plate to control the rotation of the turbine 43. When the turbine 43 rotates, the first filter 35 can be cleaned better and the gas above the turbine 43 can be extracted more quickly.

[0085] Furthermore, when gas carrying impurities enters the collecting tube 4, the gas entering the collecting tube 4 will be discharged from the second filter screen 42 at the bottom of the bottom cover 41, and the impurities will accumulate on the second filter screen 42. When the collecting tube 4 needs to be cleaned, since the collecting tube 4 is connected to the circular groove 16 by a thread, the collecting tube 4 can be directly rotated and removed from the circular groove 16, and the collecting tube 4 can be cleaned.

[0086] Embodiment 3: The gas outlet assembly includes a second disc 5; the second disc 5 is located below the mounting block 21 and slides in the detection cylinder 2;

[0087] A second spring is fixedly connected to the bottom of the second disc 5, and the other end of the second spring is fixedly connected to the bottom of the detection tube 2;

[0088] Two first air pipes 51 are installed in the second disc 5, and the top of the first air pipe 51 is connected to the space above the second disc 5; the bottom of the first air pipe 51 passes through the bottom of the detection cylinder 2 and is slidably connected to the detection cylinder 2, and then the first air pipe 51 passes through the through hole 17;

[0089] The air intake of the air groove 22 is greater than the air output of the two first air pipes 51;

[0090] A one-way valve is installed in the first air pipe 51, and the gas above the second disc 5 can only enter the first air pipe 51;

[0091] In this embodiment, a cylindrical groove is provided in the middle of the two first air pipes 51 and located in the second disc 5;

[0092] The second air pipe 52 is slidably connected in the cylindrical groove, and the second air pipe 52 passes through the bottom of the detection cylinder 2 and is slidably connected to the detection cylinder 2, and then the second air pipe 52 passes through the through hole 17;

[0093] The top of the second air pipe 52 is closed; a groove 54 is provided on the top of the second air pipe 52, and the head of the detection probe 11 is located in the groove 54 in the initial state;

[0094] The side wall of the second air pipe 52 is provided with evenly arranged air ports 53, and the air ports 53 are located inside the second disc 5 in the disposal state;

[0095] Two limit plates 55 are fixedly connected to the outer surface of the second air pipe 52 below the air port 53;

[0096] Specifically, when the gas enters the detection tube 2 through the gas groove 22, as the gas gradually increases, the gas will gradually push the second disc 5 downward and compress the second spring. The gas entering the detection tube 2 will be detected by the detection probe 11, and the gas entering the detection box 1 will enter the first air pipe 51. The gas entering the first air pipe 51 will be discharged from the first air pipe 51, so that the gas can circulate;

[0097] More specifically, since the air intake of the air groove 22 is greater than the air output of the two first air pipes 51, the air above the second disc 5 will gradually increase, so that the second disc 5 will gradually move downward. During the gradual downward movement of the second disc 5, the second air pipe 52 will be driven downward, and the second air pipe 52 will drive the limit plate 55 to move downward. When the limit plate 55 moves downward to fit the bottom surface of the detection tube 2, the second air pipe 52 will no longer move downward, and the second disc 5 will continue to move downward under the push of the gas. At this time, the second air pipe 52 gradually extends from above the second disc 5, and at the same time, it drives the evenly arranged air ports 53 to extend. When the air ports 53 move upward to above the second disc 5, the gas will enter the second air pipe 52 from the air ports 53, and then be discharged from the second air pipe 52. In this process, the sum of the gas output of the first air pipe 51 and the second air pipe 52 can gradually be balanced with the gas input of the air groove 22, thereby avoiding excessive air pressure in the detection tube 2 and affecting the detection tube 2.

[0098] Furthermore, when the detection is completed, the second disc 5 gradually moves up and returns to its initial state under the push of the second spring. During the upward movement of the second disc 5, the gas above the second disc 5 will be squeezed into the first air pipe 51, and then discharged through the first air pipe 51. Since a one-way valve is installed in the first air pipe 51, it can prevent external gas from entering the detection tube 2 through the first air pipe 51. When the second disc 5 is fitted with the mounting block 21, the second air pipe 52 is squeezed into the second disc 5. At this time, the second disc 5 will block the air port 53 on the second air pipe 52 to prevent the gas from entering the detection tube 2. At the same time, the second disc 5 will block the air groove 22 to prevent the gas from entering the detection tube 2 through the air groove 22, and the head of the detection probe 11 will extend into the groove 54 again.

[0099] Embodiment 4: An inclined groove 6 is provided on the side wall of the detection tube 2 above the two gas grooves 22; the two inclined grooves 6 extend into the mounting block 21, penetrate the mounting block 21, and extend to the bottom of the mounting block 21;

[0100] The two inclined slots 6 are slidably connected with inclined rods 61; a slide groove 63 is provided in the mounting block 21 on the opposite side of the two inclined rods 61; a slider 62 is fixedly connected to the two inclined rods 61, and the slider 62 slides in the slide groove 63;

[0101] The slider 62 is fixedly connected with a third spring, and the other end of the third spring is fixedly connected in the slide slot 63. In the initial state, the top parts of the two inclined rods 61 extend into the guide tube, and the bottoms of the inclined rods 61 do not extend out of the mounting block 21.

[0102] Specifically, since the inclined rod 61 partially extends into the guide tube in the initial state, when the conical block 37 moves up to the top of the guide tube, it will squeeze the inclined rod 61. When the inclined rod 61 is squeezed, it will be squeezed into the inclined groove 6. At the same time, the inclined rod 61 will drive the slider 62 to slide in the slide groove 63 and compress the third spring. At the same time, the bottom of the inclined rod 61 will extend from the bottom of the mounting block 21. The extended inclined rod 61 will squeeze the second disc 5 downward. The second disc 5 will move downward after being squeezed. When the second disc 5 moves downward, the second disc 5 no longer completely blocks the air groove 22. Therefore, the gas will enter the detection tube 2 through the air groove 22, thereby avoiding the second disc 5 blocking the air groove 22, resulting in the gas being unable to enter the detection tube 2.

[0103] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An exhaust gas detection device, comprising a detection box (1); an exhaust gas analyzer (101) is installed on the top of the detection box (1); a detection probe (11) is installed on the bottom of the exhaust gas analyzer (101), and the detection probe (11) extends into the detection box (1) and is rotatably connected to the detection box (1); a mounting back plate is installed on the detection box (1), and the mounting back plate is used to install the detection box (1) at a desired position; It is characterized in that A detection cylinder (2) is provided in the middle of the detection box (1); the bottom of the detection cylinder (2) is closed, and the top and bottom of the detection cylinder (2) are both in contact with the top and bottom of the inner cavity of the detection box (1); The inner cavity of the detection cylinder (2) is fixedly connected to a mounting block (21) at the top of the detection cylinder (2), and the detection probe (11) passes through the mounting block (21) and is rotatably connected to the mounting block (21); An air outlet component is provided below the mounting block (21), and the air outlet component is used to discharge the exhaust gas after detection; a through hole (17) is provided on the bottom of the air outlet component located on the detection box (1); Two guide tubes are fixedly connected to both sides of the detection tube (2), namely a first guide tube (31) and a second guide tube (32); the tops of the two guide tubes are closed, and the bottoms are in contact with the bottom of the inner cavity of the detection box (1); A drive ring (12) is fixedly connected to the outer ring surfaces of the two guide cylinders, and the outer ring surfaces of the drive ring (12) are provided with evenly arranged tooth grooves; the drive ring (12) rotates in the detection box (1); a motor (13) is installed on the top of the detection box (1), and a gear (14) is installed on the motor (13); the gear (14) extends into the detection box (1) and meshes with the tooth grooves on the drive ring (12); Gas grooves (22) are provided on the side walls of the detection cylinder (2) on both sides of the mounting block (21); one-way valves are installed in the two gas grooves (22), and the gas in the two flow guide cylinders can only enter the detection cylinder (2); An air pump (15) is provided at the bottom of the detection box (1) below the first flow guide tube (31) in the initial state, and the air outlet pipe of the air pump (15) is connected to the first flow guide tube (31); A circular groove (16) is provided below the second guide cylinder (32) in an initial state; a collecting component is installed in the circular groove (16), and the collecting component is used to collect impurities; The two guide cylinders are both slidably connected with a first disc (33); the top of each of the first discs (33) is fixedly connected with a first spring, and the other end of the first spring is connected to the top of the guide cylinder; A filter assembly is provided at the bottom of the two first discs (33), and the filter assembly is used to filter impurities in the exhaust gas.

2. An exhaust gas detection device as claimed in claim 1, characterized in that: The filter assembly comprises a slip ring (34), and the first disc (33) is in contact with the slip ring (34) in an initial state; the two slip rings (34) slide in the two guide cylinders respectively and are located below the first disc (33); A first filter screen (35) is installed in the middle of the two slip rings (34), and in an initial state, the first filter screen (35) is in contact with the bottom surface of the inner cavity of the detection box (1); Two guide rods (36) are fixedly connected to the top of the slip ring (34), and the guide rods (36) pass through the first disc (33) above; and conical blocks (37) are fixedly connected to the top of the guide rods (36).

3. An exhaust gas detection device as claimed in claim 2, characterized in that: The collecting assembly comprises a collecting cylinder (4); the collecting cylinder (4) is installed in a circular groove (16); A bottom cover (41) is installed at the bottom of the collecting cylinder (4), and the bottom cover (41) and the collecting cylinder (4) are installed via threads; a second filter screen (42) is installed on the bottom cover (41); A transverse plate is installed at the top of the collecting cylinder (4); a turbine (43) is installed on the transverse plate; and brushes (44) are fixedly connected to the blades of the turbine (43); A motor can be installed at the bottom of the transverse plate, and the motor is used to drive the turbine (43) to rotate.

4. An exhaust gas detection device as claimed in claim 3, characterized in that: The top of the first disc (33) is covered with iron sheet; the conical block (37) is a magnetic block, and when the second spring returns to its initial state, it pushes the first disc (33) away from the conical block (37).

5. An exhaust gas detection device as claimed in claim 4, characterized in that: The circular groove (16) is provided with a thread; the outer ring surface of the collecting tube (4) is also provided with a thread, and the collecting tube (4) and the circular groove (16) are mounted via the thread.

6. An exhaust gas detection device as claimed in claim 5, characterized in that: The gas outlet assembly comprises a second disc (5); the second disc (5) is located below the mounting block (21) and slides inside the detection cylinder (2); A second spring is fixedly connected to the bottom of the second disc (5), and the other end of the second spring is fixedly connected to the bottom of the detection cylinder (2); Two first air pipes (51) are installed in the second disc (5), and the top of the first air pipe (51) is connected to the space above the second disc (5); the bottom of the first air pipe (51) passes through the bottom of the detection cylinder (2) and is slidably connected to the detection cylinder (2), and then the first air pipe (51) passes through the through hole (17); The air intake of the air groove (22) is greater than the air outlet of the two first air pipes (51); A one-way valve is installed in the first air pipe (51), and the gas above the second disc (5) can only enter the first air pipe (51).

7. An exhaust gas detection device as claimed in claim 6, characterized in that: A cylindrical groove is provided in the middle of the two first air pipes (51) and located inside the second disc (5); A second air pipe (52) is slidably connected in the cylindrical groove, and the second air pipe (52) passes through the bottom of the detection cylinder (2) and is slidably connected to the detection cylinder (2), and then the second air pipe (52) passes through the through hole (17); The top of the second air pipe (52) is closed; a groove (54) is provided on the top of the second air pipe (52), and the head of the detection probe (11) is located in the groove (54) in an initial state; The side wall of the second air pipe (52) is provided with evenly arranged air ports (53), and the air ports (53) are located inside the second disc (5) in the disposal state; Two limiting plates (55) are fixedly connected to the outer circumferential surface of the second air pipe (52) below the air port (53).

8. An exhaust gas detection device as claimed in claim 7, characterized in that: An oblique groove (6) is provided on the side wall of the detection cylinder (2) above the two air grooves (22); the two oblique grooves (6) extend into the mounting block (21), penetrate the mounting block (21), and extend to the bottom of the mounting block (21); The two inclined grooves (6) are slidably connected with inclined rods (61); a sliding groove (63) is provided in the mounting block (21) on the opposite side of the two inclined rods (61); a sliding block (62) is fixedly connected to the two inclined rods (61), and the sliding block (62) slides in the sliding groove (63); A third spring is fixedly connected to the slider (62), and the other end of the third spring is fixedly connected to the slide groove (63). In an initial state, the top portions of the two inclined rods (61) extend into the guide tube, and the bottom portions of the inclined rods (61) do not extend out of the mounting block (21).

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