A hydrogen sulfide tail gas detection device

Abstract

The present invention relates to the technical field of exhaust gas detection, and discloses a hydrogen sulfide exhaust gas detection device, including a detector, a transverse tube is provided at the bottom of the detector, a straight tube is symmetrically fixedly installed at the bottom of the transverse tube, a round shell is fixedly installed at the bottom of the straight tube, a round opening is opened at the bottom of the round shell, a conduit is fixedly installed in the round opening, a switching component is provided between the bottoms of the two conduits, and a circular plate matching the same is provided inside the round shell. The present invention can intermittently realize the automatic switching of the intake conduit and the cleaning of the filter, so that the detection of the exhaust gas will not be affected by the blockage of the filter during the whole use process, and the subsequent detection is guaranteed. No manual operation is required during the whole process, which is very convenient. In the process of cleaning the filter, a cleaning liquid can be sprayed on it to dissolve impurities, thereby improving the cleaning effect of the impurities on the filter.

Description

Technical Field

[0001] The invention belongs to the technical field of tail gas detection, and in particular relates to a hydrogen sulfide tail gas detection device. Background Art

[0002] Hydrogen sulfide is an important chemical raw material. Normally, it is a colorless, flammable acidic gas. It can form an explosive mixture when mixed with air. It can cause combustion and explosion when exposed to open flames and high heat. It is also an acute and highly toxic substance with a rotten egg smell. Low concentrations of hydrogen sulfide have effects on the eyes, respiratory system and central nervous system. Inhaling a small amount of high-concentration hydrogen sulfide can be fatal in a short period of time.

[0003] Due to the highly toxic nature of hydrogen sulfide, it is necessary to test the exhaust gas discharged from the factory to avoid excessive hydrogen sulfide content in the exhaust gas and cause accidents. A hydrogen sulfide detector is needed during the detection process. When the existing detector is in use, it is fixed in one place. As it is used, the filter inside is prone to clogging, affecting the inhalation detection of the exhaust gas. Therefore, workers are required to inspect and clean the filter. However, when the detector is set at a high position, it is very inconvenient to inspect it.

[0004] Therefore, it is necessary to invent a hydrogen sulfide tail gas detection device to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a hydrogen sulfide tail gas detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydrogen sulfide exhaust gas detection device, comprising a detector, a horizontal tube is provided at the bottom of the detector, a straight tube is symmetrically fixedly installed at the bottom of the horizontal tube, a round shell is fixedly installed at the bottom of the straight tube, a round opening is opened at the bottom of the round shell, a conduit is fixedly installed in the round opening, a switching component is provided between the bottoms of the two conduits, a circular plate matching the circular shell is provided inside the circular shell, a movable opening corresponding to the circular opening is provided on the circular plate, a ring plate is provided in the movable opening, a filter is fixedly installed inside the ring plate, a motor is fixedly installed in the middle of the top end of the circular shell, the output shaft of the motor extends into the circular shell and is fixedly connected to the middle of the top end of the circular plate, a controller for controlling the motor is provided on the switching component, and a vibration component for driving the filter to vibrate is provided outside the filter.

[0007] Furthermore, the vibration assembly includes a pair of first springs, the inner wall of the movable opening is symmetrically provided with slide grooves, a slide plate is slidably installed in the slide groove, the bottom of the slide plate is fixedly connected to the ring plate, the top of the slide plate is fixedly connected to the top wall of the slide groove through the first spring, the bottom of the filter is provided with a lifting assembly for driving it to rise, and the bottom of the round shell is provided with a drop port on the side away from the conduit.

[0008] Furthermore, the lifting assembly includes a protrusion fixedly installed at the bottom of the filter, an arc-shaped plate is fixedly installed inside the drop port, a top block cooperating with the protrusion is fixedly installed equidistantly around the top of the arc-shaped plate, and the bottom of the protrusion and the top of the top block are both provided with arc surfaces.

[0009] Furthermore, an annular cavity is provided inside the annular plate, spray holes communicating with the annular cavity are equidistantly arranged around the inner side of the annular plate, and a liquid injection assembly for injecting cleaning liquid into the annular cavity is provided on the circular plate.

[0010] Furthermore, the liquid injection assembly includes a cylinder body, a cavity connected to a slide groove on one side is formed on the circular plate, the cylinder body is fixedly mounted on the top wall of the cavity, a channel is formed on the slide plate close to the cavity, one end of the channel is connected to the annular cavity, a hose connected to the channel is fixedly connected to an upper part of one side of the cylinder body, a storage cavity is provided inside the circular plate, a straw connected to the storage cavity is fixedly installed on an upper part of a side of the cylinder body away from the hose, a one-way valve is provided inside the straw and the hose, a piston is provided inside the cylinder body, a pressure rod is fixedly installed at the bottom of the piston, the cross-sectional shape of the pressure rod is an inverted "T" shape, the bottom of the pressure rod extends to the outer sleeve of the cylinder body and is provided with a second spring, a valve connected to the storage cavity is provided on the top of the circular plate, a liquid filling port corresponding to the valve position is formed on the top of the circular shell, a plunger is provided in the liquid filling port, and the storage cavity is filled with cleaning liquid.

[0011] Furthermore, there is a gap between the bottom of the pressure rod and the slide plate.

[0012] Furthermore, when the protrusion moves to contact with the arc surface of the top block and the protrusion, the filter screen, the ring plate and the slide plate rise to the highest point, the slide plate does not contact with the bottom of the pressure rod.

[0013] Furthermore, the switching assembly includes a shell fixedly installed between two conduits, the shell is cylindrical, a column is rotatably installed inside the shell, the shell is connected to the conduit, an air inlet is opened at the bottom of the column, and the air inlet is in a "7" shape. A motor is fixedly installed in the middle of the top end of the shell, and the output shaft of the motor extends into the shell and is fixedly connected to the middle of the top end of the column. The controller is fixed on the top of the shell, and the controller can control the motor and the motor.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The present invention can intermittently realize automatic switching of the intake duct and cleaning of the filter, so that the detection of the exhaust gas will not be affected by the blockage of the filter during the whole use process, and the subsequent detection is guaranteed. The whole process does not require manual work, which is very convenient;

[0016] 2. The present invention can spray cleaning liquid on the filter during the cleaning process to dissolve impurities, thereby improving the cleaning effect of the impurities on the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram showing the structure of a hydrogen sulfide tail gas detection device according to an embodiment of the present invention is shown;

[0018] Figure 2 The lower half of the cross-sectional structure of the hydrogen sulfide tail gas detection device according to the embodiment of the present invention is shown. Figure 1 ;

[0019] Figure 3 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 The embodiment of the present invention is shown Figure 3 The enlarged structural diagram at B in the middle;

[0021] Figure 5 The lower half of the cross-sectional structure of the hydrogen sulfide tail gas detection device according to the embodiment of the present invention is shown. Figure 2 ;

[0022] Figure 6 The embodiment of the present invention is shown Figure 5 The enlarged structural diagram at C in the middle;

[0023] In the figure: 1. detector; 2. horizontal tube; 3. straight tube; 4. round shell; 5. conduit; 6. round plate; 7. motor; 8. ring plate; 9. filter; 10. first spring; 11. slide plate; 12. bump; 13. arc plate; 14. top block; 15. annular cavity; 16. spray hole; 17. cylinder body; 18. hose; 19. straw; 20. piston; 21. second spring; 22. storage cavity; 23. plunger; 24. shell; 25. column; 26. air inlet; 27. motor; 28. controller; 29. ​​pressure rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0025] The present invention provides a hydrogen sulfide tail gas detection device, such as Figures 1 to 6As shown, it includes a detector 1, a transverse tube 2 is provided at the bottom of the detector 1, a straight tube 3 is symmetrically fixedly installed at the bottom of the transverse tube 2, a round shell 4 is fixedly installed at the bottom of the straight tube 3, a round opening is opened at the bottom of the round shell 4, a conduit 5 is fixedly installed in the round opening, a switching assembly is provided between the bottoms of the two conduits 5, a round plate 6 matching the round shell 4 is provided inside the round shell 4, a movable opening corresponding to the round opening is provided on the round plate 6, a ring plate 8 is provided in the movable opening, a filter screen 9 is fixedly installed inside the ring plate 8, a motor 7 is fixedly installed in the middle of the top end of the round shell 4, the output shaft of the motor 7 extends into the round shell 4 and is fixedly connected to the middle of the top end of the round plate 6, a controller 28 for controlling the motor 7 is provided on the switching assembly, and a vibration assembly for driving the filter screen 9 to vibrate is provided outside the filter screen 9.

[0026] When in use, the detector 1 is installed at the desired detection location. The detector 1 is a hydrogen sulfide detector in the prior art. The external exhaust gas is sucked in through one of the conduits 5 through the detector 1. After the impurities are filtered out by the filter 9, the exhaust gas enters the straight pipe 3, the horizontal pipe 2, and the detector 1 for detection. As the detection proceeds, more and more impurities are filtered at the bottom of the filter 9. At this time, the switching component switches the intake conduit 5 to another one. At the same time, the controller 28 controls the output shaft of the motor 7 to rotate with the circular plate 6, the ring plate 8, and the filter 9, and cooperates with the vibration component to vibrate the filter 9 so that the exhaust gas can be removed. The impurities on the filter 9 are shaken off and the filter 9 is cleaned. After the cleaning is completed, as the motor 7 continues to rotate, the filter 9 is reset, and the cleaning of the filter 9 is completed to keep it clean, ensuring the subsequent normal filtering use. At this time, due to the switching of the duct 5, the impurities in the exhaust gas are filtered by another filter 9. The subsequent switching of the intake duct 5 and the cleaning of the filter 9 can be intermittently realized according to the same principle, so that during the entire use process, the detection of the exhaust gas will not be affected by the blockage of the filter 9, thereby ensuring the subsequent detection. No manual operation is required in the entire process, which is very convenient.

[0027] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the vibration assembly includes a pair of first springs 10, the inner wall of the movable opening is symmetrically provided with slide grooves, a slide plate 11 is slidably installed in the slide groove, the bottom of the slide plate 11 is fixedly connected to the ring plate 8, the top of the slide plate 11 is fixedly connected to the top wall of the slide groove through the first spring 10, a lifting assembly for driving the filter screen 9 to rise is provided at the bottom, and a drop opening is provided at the side of the bottom of the round shell 4 away from the conduit 5.

[0028] As the filter screen 9 rotates, the filter screen 9 is lifted by the lifting component. The filter screen 9 rises with the ring plate 8 and the slide plate 11 to compress the first spring 10 to deform it and generate a force. Then, when the filter screen 9 moves to above the drop port, the lifting component cancels the lifting of the filter screen 9. The compressed first spring 10 releases the force to carry the slide plate 11, the ring plate 8, and the filter screen 9 to drop rapidly, so that the ring plate 8 collides with the bottom of the round shell 4 to generate vibration, thereby transmitting the vibration to the filter screen 9 to vibrate it, and then shaking off the impurities attached to its surface. Then, the lifting component intermittently lifts the filter screen 9 and cancels its lifting, so that the filter screen 9 vibrates continuously, so that the impurities attached to its bottom can be better shaken off and cleaned, and the impurities fall to the outside through the drop port.

[0029] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the lifting assembly includes a protrusion 12 fixedly installed at the bottom of the filter 9, an arc plate 13 is fixedly installed inside the drop port, and a top block 14 cooperating with the protrusion 12 is fixedly installed equidistantly around the top of the arc plate 13, and the bottom of the protrusion 12 and the top of the top block 14 are both provided with arc surfaces.

[0030] When the arc surface of the protrusion 12 contacts the top of the conduit 5, the protrusion 12 is squeezed, causing the filter screen 9 to rise. The filter screen 9 rises with the ring plate 8 and the slide plate 11 to compress the first spring 10 to deform it and generate a force. When the protrusion 12 is separated from the conduit 5 and the inner wall of the round shell 4, that is, the protrusion 12 moves to the drop mouth, the compressed first spring 10 releases the force to quickly drop the slide plate 11, the ring plate 8, and the filter screen 9. Then the protrusion 12 contacts the arc surface of the top block 14. Based on the same principle, the filter screen 9 rises. Then the protrusion 12 separates from the top block 14, causing the filter screen 9 to descend and vibrate. The filter screen 9 is continuously vibrated by the continuous contact and separation between the protrusion 12 and the top block 14.

[0031] like Figures 2 to 4 As shown, an annular cavity 15 is provided inside the annular plate 8 , and spray holes 16 communicating with the annular cavity 15 are equidistantly arranged around the inner side of the annular plate 8 . An injection assembly for injecting cleaning liquid into the annular cavity 15 is provided on the circular plate 6 .

[0032] When the curved surface of the protrusion 12 contacts the top of the conduit 5, the movement of the protrusion 12 causes the slide plate 11 to rise. At this time, the slide plate 11 cooperates with the liquid injection component to inject the cleaning liquid into the annular cavity 15, so that it is sprayed out through the spray hole 16. The cleaning liquid falls on the filter 9 and dissolves the impurities on its surface. After the cleaning liquid is sprayed, the controller 28 pauses the motor 7 to stop the movement of the filter 9. The cleaning liquid dissolves the impurities in the filter 9 for a period of time. Then the controller 28 controls the motor 7 to start, so that the filter 9 continues to move, and cooperates with the subsequent vibration of the filter 9 to shake off the attached impurities. After the impurities are dissolved, they can fall more easily.

[0033] like Figure 4 As shown, the liquid injection assembly includes a cylinder 17, a cavity connected to a slide groove on one side is opened on the circular plate 6, the cylinder 17 is fixedly installed on the top wall of the cavity, a channel is opened on the slide plate 11 close to the cavity, one end of the channel is connected to the annular cavity 15, a hose 18 connected to the channel is fixedly connected to the upper part of one side of the cylinder 17, a storage chamber 22 is provided inside the circular plate 6, a straw 19 connected to the storage chamber 22 is fixedly installed on the upper part of the side of the cylinder 17 away from the hose 18, and a one-way valve is provided inside the straw 19 and the hose 18 A piston 20 is provided inside the cylinder body 17, a pressure rod 29 is fixedly installed at the bottom of the piston 20, the cross-sectional shape of the pressure rod 29 is an inverted "T" shape, the bottom of the pressure rod 29 extends to the outer sleeve of the cylinder body 17 and a second spring 21 is provided, a valve connected to the storage chamber 22 is provided on the top of the circular plate 6, a liquid filling port corresponding to the valve position is opened on the top of the circular shell 4, a plunger 23 is provided in the liquid filling port, and the storage chamber 22 is filled with a cleaning liquid, which is a cleaning liquid in the prior art that can dissolve solid impurities contained in the exhaust gas.

[0034] After the protrusion 12 contacts the top of the conduit 5, the slide plate 11 rises and contacts the bottom of the pressure rod 29, so that the pressure rod 29 and the piston 20 rise to squeeze the cleaning liquid in the cylinder 17 outward. At the same time, the pressure rod 29 compresses the second spring 21 to deform it and generate a force. At this time, the one-way valve in the hose 18 opens, and the one-way valve in the suction pipe 19 closes. At this time, the cleaning liquid enters the channel through the hose 18, and then enters the annular cavity 15, and finally sprays out through the spray hole 16. When the protrusion 12 moves to the drop port, the compressed first spring 10 releases its force and the slide plate 11 descends. At this time, the second spring 21 releases its force and the pressure rod 29 and the piston 20 descend, so that the cleaning liquid is drawn into the cylinder 17. At this time, the one-way valve in the hose 18 is closed, and the one-way valve in the suction pipe 19 is opened. As the piston 20 descends, the cleaning liquid in the storage chamber 22 is sucked into the cylinder 17 through the suction pipe 19 for replenishment.

[0035] like Figure 4 As shown, there is a gap between the bottom of the pressing rod 29 and the slide plate 11 .

[0036] When the subsequent protrusion 12 contacts the top block 14 and rises, the slide plate 11 is at the highest point and will not squeeze the pressure rod 29 to rise, so that the cleaning liquid will not be sprayed out, thereby avoiding the waste of the cleaning liquid.

[0037] like Figure 4 As shown, when the protrusion 12 moves to contact the arc surface of the top block 14 and the protrusion 12, the filter screen 9, the ring plate 8 and the slide plate 11 rise to the highest point, the slide plate 11 does not contact the bottom of the pressure rod 29.

[0038] This prevents the cleaning liquid from being squeezed out and wasted during the vibration of the filter screen 9.

[0039] like Figure 2 As shown, the switching assembly includes a shell 24 fixedly installed between two conduits 5. The shell 24 is cylindrical. A column 25 is rotatably installed inside the shell 24. The shell 24 is connected to the conduit 5. An air inlet 26 is opened at the bottom of the column 25. The air inlet 26 is in the shape of "7". A motor 27 is fixedly installed in the middle of the top of the shell 24. The output shaft of the motor 27 extends into the shell 24 and is fixedly connected to the middle of the top of the column 25. A controller 28 is fixed on the top of the shell 24. The controller 28 can control the motor 7 and the motor 27. A circular air inlet is provided at the bottom of the shell 24.

[0040] The controller 28 is a PLC controller, which can realize automatic control of the motor 7 and the motor 27 by setting programming. The controller 28 controls the output shaft of the motor 27 to rotate the column 25, so that the air inlet 26 is adjusted to be aligned with another duct 5, thereby realizing the switching of the air inlet duct 5.

[0041] Working principle: When in use, install the detector 1 at the desired detection location. The detector 1 is a hydrogen sulfide detector in the prior art. The external tail gas is sucked in through the detector 1 through the air inlet circular port at the bottom of the shell 24, the air inlet 26 and one of the conduits 5. After the impurities are filtered out by the filter 9, the tail gas enters the straight pipe 3, the horizontal pipe 2 and the detector 1 for detection. As the detection proceeds, more and more impurities are filtered out at the bottom of the filter 9. The controller 28 controls the output shaft of the motor 27 to rotate with the column 25, so that The air inlet 26 must be adjusted to be aligned with another conduit 5 to switch the air inlet conduit 5, so that the air inlet conduit 5 is switched to another one. At the same time, the controller 28 controls the output shaft of the motor 7 to rotate with the circular plate 6, the ring plate 8, and the filter screen 9. When the arc surface of the filter screen 9 with the protrusion 12 contacts the top of the conduit 5, the protrusion 12 is squeezed, so that the filter screen 9 rises, and the filter screen 9 rises with the ring plate 8 and the slide plate 11 to compress the first spring 10 to deform it and generate a force. When the protrusion 12 is aligned with the conduit 5 and When the inner wall of the round shell 4 is separated, that is, when the protrusion 12 moves to the drop opening, the compressed first spring 10 releases its force to carry the slide plate 11, the ring plate 8, and the filter screen 9 to drop rapidly, so that the ring plate 8 collides with the bottom of the round shell 4 to generate vibration, thereby transmitting the vibration to the filter screen 9 to make it vibrate, and then the impurities attached to its surface are shaken off, and then the protrusion 12 contacts with the arc surface of the top block 14, and the same principle is used to make the filter screen 9 rise, and then the protrusion 12 separates from the top block 14, so that the filter screen 9 drops and vibrates, and the filter screen 9 is continuously vibrated by the continuous contact and separation between the protrusion 12 and the top block 14, so that the filter screen 9 is cleaned, so that it is kept clean, and the subsequent normal filtering use is ensured. At this time, due to the switching of the duct 5, the impurities in the exhaust gas are filtered by another filter screen 9. The same principle is used later. Through the control of the controller 28, the switching of the intake duct 5 and the cleaning of the filter screen 9 can be intermittently realized, so that the detection of the exhaust gas will not be affected by the blockage of the filter screen 9 during the entire use process, and the subsequent detection is ensured.After the protrusion 12 contacts the top of the conduit 5, the slide plate 11 rises and contacts the bottom of the pressure rod 29, so that the pressure rod 29 and the piston 20 rise to squeeze the cleaning liquid in the cylinder 17 outward. At the same time, the pressure rod 29 compresses the second spring 21 to deform it and generate a force. At this time, the one-way valve in the hose 18 opens, and the one-way valve in the straw 19 closes. At this time, the cleaning liquid enters the channel through the hose 18, and then enters the annular cavity 15, and finally sprays out through the spray hole 16. The cleaning liquid falls on the filter screen 9 and dissolves the impurities on its surface. After the cleaning liquid is sprayed, the controller 28 pauses the motor 7 to stop the movement of the filter screen 9. The cleaning liquid dissolves the impurities in the filter screen 9 for a period of time. Then the controller 28 controls the motor 7 to start, so that the filter 9 continues to move, and with the subsequent vibration of the filter 9, the attached impurities can be shaken off. After the impurities are dissolved, they can fall more easily, thereby improving the cleaning effect of the filter 9. When the protrusion 12 moves to the drop port, the compressed first spring 10 releases the force to bring the slide plate 11 down. At this time, the second spring 21 releases the force to bring the pressure rod 29 and the piston 20 down, so that the cleaning liquid is drawn into the cylinder 17. At this time, the one-way valve in the hose 18 is closed, and the one-way valve in the suction pipe 19 is opened. As the piston 20 descends, the cleaning liquid in the storage chamber 22 is sucked into the cylinder 17 through the suction pipe 19 for replenishment. ;

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A hydrogen sulfide tail gas detection device, comprising a detector (1), characterized in that: The detector (1) is provided with a transverse tube (2) at the bottom, a straight tube (3) is symmetrically fixedly installed at the bottom of the transverse tube (2), a round shell (4) is fixedly installed at the bottom of the straight tube (3), a round opening is opened at the bottom of the round shell (4), a guide tube (5) is fixedly installed in the round opening, a switching assembly is provided between the bottoms of the two guide tubes (5), a round plate (6) matching the round shell (4) is provided inside the round shell (4), a movable opening corresponding to the round opening is provided on the round plate (6), a ring plate (8) is provided inside the movable opening, a filter screen (9) is fixedly installed inside the ring plate (8), a motor (7) is fixedly installed at the middle of the top end of the round shell (4), an output shaft of the motor (7) extends into the round shell (4) and is fixedly connected to the middle of the top end of the round plate (6), a controller (28) for controlling the motor (7) is provided on the switching assembly, and a vibration assembly for driving the filter screen (9) to vibrate is provided outside the filter screen (9); The vibration assembly comprises a pair of first springs (10), the inner wall of the movable opening is symmetrically provided with a slide groove, a slide plate (11) is slidably installed in the slide groove, the bottom of the slide plate (11) is fixedly connected to the ring plate (8), the top of the slide plate (11) is fixedly connected to the top wall of the slide groove through the first spring (10), the bottom of the filter screen (9) is provided with a lifting assembly for driving it to rise, and the bottom of the round shell (4) is provided with a drop opening on the side away from the conduit (5); The lifting assembly comprises a protrusion (12) fixedly mounted on the bottom of the filter screen (9), an arc-shaped plate (13) fixedly mounted inside the drop-out opening, a top block (14) matching the protrusion (12) fixedly mounted equidistantly around the top of the arc-shaped plate (13), and the bottom of the protrusion (12) and the top of the top block (14) are both provided with an arc surface; The switching assembly comprises a housing (24) fixedly mounted between two conduits (5), the housing (24) being cylindrical, a column (25) being rotatably mounted inside the housing (24), the housing (24) being in communication with the conduit (5), an air inlet (26) being provided at the bottom of the column (25), the air inlet (26) being in the shape of a "7", a motor (27) being fixedly mounted at the middle of the top end of the housing (24), an output shaft of the motor (27) extending into the housing (24) and being fixedly connected to the middle of the top end of the column (25), the controller (28) being fixed at the top of the housing (24), the controller (28) being capable of controlling the motor (7) and the motor (27).

2. The hydrogen sulfide tail gas detection device according to claim 1, characterized in that: An annular cavity (15) is provided inside the annular plate (8), spray holes (16) communicating with the annular cavity (15) are equidistantly arranged around the inner side of the annular plate (8), and a liquid injection component for injecting cleaning liquid into the annular cavity (15) is provided on the circular plate (6).

3. The hydrogen sulfide tail gas detection device according to claim 2, characterized in that: The liquid injection assembly comprises a cylinder (17), a cavity connected to a slide groove on one side is formed on the circular plate (6), the cylinder (17) is fixedly mounted on the top wall of the cavity, a channel is formed on the slide plate (11) close to the cavity, one end of the channel is connected to the annular cavity (15), a hose (18) connected to the channel is fixedly connected to the upper part of one side of the cylinder (17), a storage cavity (22) is formed inside the circular plate (6), a straw (19) connected to the storage cavity (22) is fixedly mounted on the upper part of the side of the cylinder (17) away from the hose (18), the straw (19) A one-way valve is provided inside the cylinder body (17) and the hose (18). A piston (20) is provided inside the cylinder body (17). A pressure rod (29) is fixedly mounted on the bottom of the piston (20). The cross-sectional shape of the pressure rod (29) is an inverted "T" shape. The bottom of the pressure rod (29) extends to the outer sleeve of the cylinder body (17) and is provided with a second spring (21). A valve communicating with the storage chamber (22) is provided on the top of the circular plate (6). A liquid filling port corresponding to the position of the valve is provided on the top of the circular shell (4). A plunger (23) is provided in the liquid filling port. The storage chamber (22) is filled with cleaning liquid.

4. The hydrogen sulfide tail gas detection device according to claim 3, characterized in that: There is a gap between the bottom of the pressure rod (29) and the slide plate (11).

5. The hydrogen sulfide tail gas detection device according to claim 4, characterized in that: When the protrusion (12) moves to contact the arc surface of the top block (14), the protrusion (12), the filter screen (9), the ring plate (8), and the slide plate (11) rise to the highest point, the slide plate (11) does not contact the bottom of the pressure rod (29).

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