Sampling device for gas detection

Abstract

The invention discloses a sampling device for gas detection, and belongs to the technical field of gas detection. The device comprises a shell, a sampling assembly is installed in the shell, the sampling assembly comprises a sampling pipe, the shell is fixedly connected with a pump body, the pump body is communicated with the sampling pipe, the shell is fixedly connected with an air inlet pipe, a filter box is fixedly connected between the air inlet pipe and the sampling pipe, and a moving frame is slidably connected in the filter box. A hydraulic cylinder is fixedly installed in the filter box, the movable frame is fixedly connected with two filter screens and a telescopic baffle, a control cylinder is rotatably installed on the filter box, and a first torsion spring is fixedly connected between the control cylinder and the filter box. In the gas sampling process, the position of the moving frame is adjusted through the hydraulic cylinder, in the gas sampling process, opening and closing control operation on the sampling pipe can be automatically completed, the overall structure is simple, and the intelligent degree is high.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and particularly to a sampling device for gas detection. Background Art

[0002] Gas detection refers to the quantitative or qualitative analysis of various gas components in the air through professional instruments and methods. The purpose is to monitor the gas concentration in the environment to ensure safety and production efficiency. During the gas detection process, it is necessary to sample the gas in the target environment. When sampling, the sampling device is placed in the target environment, and the pump body in the sampling device is started to suck the gas inside the target environment into the sampling device, thereby completing the sampling operation. The overall operation is simple; In the actual detection process, in order to improve the sampling effect, a substance that can adsorb impurities (such as activated carbon) is placed in the sampling device to adsorb the impurities in the sampled air, thereby improving the accuracy of subsequent results. The overall structure is simple. However, in the actual detection process, first, during the sampling process, a certain amount of dust will accumulate in the sampling device, especially in the front side of the sampling tube in the sampling device, which will reduce the cleanliness of the sampling device and affect the sampling effect, resulting in certain errors. Moreover, during the detection process, during the process of activated carbon adsorbing impurities, local saturation will occur too quickly, affecting the adsorption effect. Also, during the sampling process, dust will accumulate on the filter screen in the sampling device, further affecting gas flow and the gas sampling effect. Therefore, a sampling device for gas detection is provided. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a sampling device for gas detection is proposed.

[0004] The present invention adopts the following technical solutions: A sampling device for gas detection, comprising a housing, a sampling assembly is installed inside the housing, the sampling assembly includes a sampling tube, the housing is fixedly connected with a pump body, and the pump body is communicated with the sampling tube, the housing is fixedly connected with an air inlet pipe, and a filter box is fixedly connected between the air inlet pipe and the sampling tube, a moving frame is slidably connected in the filter box, a hydraulic cylinder is fixedly installed in the filter box, the moving frame is fixedly connected with two filter nets, the moving frame is fixedly connected with a telescopic baffle, a control cylinder is rotatably installed in the filter box, a first torsion spring is fixedly connected between the control cylinder and the filter box, the control cylinder is fixedly connected with a rotating ring, a plurality of square rods are slidably connected to the rotating ring, each square rod is fixedly connected with an arc-shaped plate, the moving frame is fixedly connected with a fixing plate, the fixing plate is fixedly connected with a stepped plate, the control cylinder is fixedly connected with a clamping plate, a rotating shaft is rotatably connected to the clamping plate, the rotating shaft is fixedly connected with a triangular plate, and a second torsion spring is fixedly connected between the triangular plate and the clamping plate.

[0005] Preferably, a collection assembly is installed on the lower arc-shaped plate, the collection assembly includes a collection groove opened on the lower arc-shaped plate, a sealing plate is slidably connected to the collection groove, a third spring is fixedly connected between the sealing plate and the collection groove, the sealing plate is fixedly connected with a conical cylinder, a first switch plate is slidably connected to the collection groove, the triangular plate is fixedly connected with an inclined plate, and a second switch plate is slidably connected to the control cylinder.

[0006] Preferably, a rotating assembly is installed inside the moving frame, the rotating assembly includes a plurality of rotating rods rotatably penetrating through the moving frame, a plurality of rotating plates are fixedly connected to the outer side of each rotating rod, a gear is fixedly connected to the lower side of each rotating rod, two adjacent gears are meshed with each other, a first rack is slidably connected to the lower side of the moving frame, the first rack is meshed with one of the gears, a first connecting rod is fixedly connected to the outer side of the first rack, a control frame is slidably connected inside the filter box, the first connecting rod slidably penetrates through the control frame, a toothed ring is fixedly connected to the outer side of the control cylinder, and a second rack is meshed with the outer side of the toothed ring, and the second rack is fixedly connected to the control frame through a second connecting rod.

[0007] Preferably, a knocking assembly is installed on the outer side of the moving frame, the knocking assembly includes a right-angled rod fixedly installed on the upper side of the first connecting rod, the right-angled rod slidably penetrates through the fixing plate, a convex plate is fixedly connected to one end of the right-angled rod, a limiting plate is fixedly connected to the side wall of the fixing plate, a knocking rod is slidably connected to the side wall of the limiting plate, a knocking head is fixedly connected to one end of the knocking rod, a knocking plate is fixedly connected to the other end of the knocking rod, and a first spring is fixedly connected between the knocking plate and the limiting plate.

[0008] Preferably, a connection frame is fixedly connected to the outer side of the knocking plate, a moving ring is fixedly connected to the outer sides of a plurality of the square rods, a second spring is fixedly connected between the moving ring and the rotating ring, a connecting plate is fixedly connected to the side wall of the moving ring, and the connection frame slidably penetrates through the connecting plate.

[0009] Preferably, a display component is fixedly connected to the outer side of the housing, and a shock-absorbing bracket is fixedly connected to the lower side of the housing.

[0010] Preferably, heat dissipation fans are fixedly connected to both sides of the housing, and heat dissipation plates are also fixedly connected to both sides of the housing.

[0011] Preferably, a box cover is installed on the upper side of the housing through a plurality of groups of bolts, and a pull ring is fixedly connected to the upper side of the box cover.

[0012] The beneficial effects of the present invention are as follows: 1. First, during the process of gas sampling, the position of the moving frame is adjusted through the hydraulic cylinder, and during this process, the opening and closing control operation of the sampling pipe can be automatically completed. The overall structure is simple and the degree of intelligence is relatively high; 2. Moreover, during this process, the control cylinder and the control plate rotate back and forth as a whole, that is, the arc-shaped plate rotates back and forth all the time. The arc-shaped plate rotating back and forth can form a good cleaning effect on the air inlet pipe, keep the air inlet pipe clean, and ultimately improve the sampling effect. And during the cleaning process, it can also be collected through the collection groove, thereby further improving the cleaning effect on the air inlet pipe; 3. Then, during this process, all the gears will also rotate. The gears drive the rotating rod and the rotating plate to rotate. The rotating plate abuts against the substance that can adsorb impurities in the moving frame, thereby maximizing the adsorption effect of the substance and improving the sampling effect; 4. At the same time, it will also drive the knocking head to move back and forth as a whole. The knocking head abuts against the filter screen, forming a knocking effect on the filter screen, reducing the possibility of dust sticking to the filter screen, keeping the filter screen in an overall working state all the time, and reducing the adverse impact on gas flow; 5. Finally, during the process of the knocking plate, the knocking rod, and the knocking head moving back and forth as a whole, when the moving frame moves up and down, the arc-shaped plate will not only rotate, but also move back and forth left and right, thereby improving the cleaning effect on the inner wall of the air inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a sampling device for gas detection proposed by the present invention; Figure 2 is a schematic internal connection diagram of a sampling device for gas detection proposed by the present invention; Figure 3 Schematic diagram of the internal connection of the filter box in a sampling device for gas detection proposed by the present invention; Figure 4 Schematic diagram of the internal connection of the moving frame in a sampling device for gas detection proposed by the present invention; Figure 5 Schematic diagram of the connection of the arc plate and the moving frame from another angle in a sampling device for gas detection proposed by the present invention; Figure 6 Schematic diagram of the bottom connection of the moving frame in a sampling device for gas detection proposed by the present invention; Figure 7 Schematic diagram of the connection of the right-angle rod and the first connecting rod in a sampling device for gas detection proposed by the present invention; Figure 8 Schematic diagram of the connection of the knocking rod, the knocking head and the knocking plate in a sampling device for gas detection proposed by the present invention; Figure 9 Schematic diagram of the connection of the stepped plate and the control cylinder in a sampling device for gas detection proposed by the present invention; Figure 10 Schematic diagram of the connection of the stepped plate and the control cylinder from another angle in a sampling device for gas detection proposed by the present invention; Figure 11 Schematic diagram of the sectional connection of the control cylinder in a sampling device for gas detection proposed by the present invention; Figure 12 is Figure 11 the enlarged view of the structure at A in; Figure 13 Schematic diagram of the sectional connection of the collection tank in a sampling device for gas detection proposed by the present invention.

[0014] In the figure: 1 housing, 2 intake pipe, 3 sampling pipe, 4 filter box, 5 pump body, 6 moving frame, 7 filter net, 8 hydraulic cylinder, 9 telescopic baffle, 10 rotating rod, 11 rotating plate, 12 arc plate, 13 control frame, 14 first torsion spring, 15 rotating ring, 16 control cylinder, 17 control plate, 18 fixing plate, 19 gear, 20 first rack, 21 first connecting rod, 22 moving ring, 23 square rod, 24 second spring, 25 connecting plate, 26 connecting frame, 27 right-angle rod, 28 protruding plate, 29 limiting plate, 30 knocking rod, 31 knocking head, 32 first spring, 33 knocking plate, 34 second connecting rod, 35 second rack, 36 toothed ring, 37 stepped plate, 38 first switch plate, 39 second switch plate, 40 clamping plate, 41 rotating shaft, 42 triangular plate, 43 inclined plate, 44 second torsion spring, 45 conical cylinder, 46 third spring, 47 collection tank, 48 sealing plate. Detailed implementation manners

[0015] Refer to Figures 1-13 , a sampling device for gas detection, comprising a housing 1, a sampling assembly is installed inside the housing 1, the sampling assembly includes a sampling tube 3, a pump body 5 is fixedly connected to the housing 1, and the pump body 5 is communicated with the sampling tube 3, an air inlet pipe 2 is fixedly connected to the housing 1, and a filter box 4 is fixedly connected between the air inlet pipe 2 and the sampling tube 3. A moving frame 6 is slidably connected in the filter box 4, a hydraulic cylinder 8 is fixedly installed in the filter box 4, two filter nets 7 are fixedly connected to the moving frame 6, a telescopic baffle 9 is fixedly connected to the moving frame 6, and a sealing cushion layer is installed on the side wall of the telescopic baffle 9. When the telescopic baffle 9 closes the sampling tube 3, its sealing performance can be enhanced. A sealing cover is installed on the upper side of the filter box 4 through multiple groups of bolts. Heat dissipation fans are fixedly connected to both sides of the housing 1, and heat dissipation plates are also fixedly connected to both sides of the housing 1 to improve the heat dissipation effect on the pump body 5. A display assembly is fixedly connected to the outside of the housing 1, and shock-absorbing brackets are fixedly connected to the lower side of the housing 1; First, the hydraulic cylinder 8 is located below the moving frame 6, and the output end of the hydraulic cylinder 8 abuts against the moving frame 6. The display assembly includes a plurality of display screens fixedly installed on the front side of the housing 1, and the display screens are electrically connected to the controller of the pump body 5 through wires. Before the sampling operation, an appropriate amount of adsorbent material that can adsorb impurities, such as block-shaped activated carbon, is placed into the moving frame 6. Then, the hydraulic cylinder 8 is started, and the hydraulic cylinder 8 drives the moving frame 6 to move until the filter nets 7 on the side wall of the moving frame 6 are respectively opposite to the sampling tube 3 and the air inlet pipe 2. At this time, the telescopic baffle 9 is located below the sampling tube 3. The whole device is moved to a suitable sampling position, and the pump body 5 is started to make the air in the sampling space enter the sampling tube 3 along the direction of the air inlet pipe 2 - filter net 7 - adsorbent material - filter net 7 until the air content in the sampling tube 3 meets the working requirements. Then, the pump body 5 is closed, and the hydraulic cylinder 8 is started again to make the hydraulic cylinder 8 drive the moving frame 6 to move upward. The moving frame 6 drives the telescopic baffle 9 to extend upward through a connecting rod until the telescopic baffle 9 closes the sampling tube 3, and finally the gas sampling operation is completed. After the sampling operation is completed, when it is necessary to detect the gas, the above opposite operations can be repeated to discharge the gas in the sampling tube 3. All of the above are existing technologies and will not be elaborated further; The filter box 4 is rotatably installed with a control cylinder 16. A first torsion spring 14 is fixedly connected between the control cylinder 16 and the filter box 4. The control cylinder 16 is fixedly connected with a rotating ring 15. A plurality of square rods 23 are slidably connected to the rotating ring 15. Each square rod 23 is fixedly connected with an arc-shaped plate 12. The moving frame 6 is fixedly connected with a fixing plate 18. The fixing plate 18 is fixedly connected with a stepped plate 37. The control cylinder 16 is fixedly connected with a clamping plate 40. The clamping plate 40 is rotatably connected with a rotating shaft 41. The rotating shaft 41 is fixedly connected with a triangular plate 42. A second torsion spring 44 is fixedly connected between the triangular plate 42 and the clamping plate 40. A collection assembly is installed on the lower arc-shaped plate 12. The collection assembly includes a collection groove 47 opened on the lower arc-shaped plate 12. A sealing plate 48 is slidably connected to the collection groove 47. A third spring 46 is fixedly connected between the sealing plate 48 and the collection groove 47. The sealing plate 48 is fixedly connected with a conical cylinder 45. A first switch plate 38 is slidably connected to the collection groove 47. The triangular plate 42 is fixedly connected with an inclined plate 43. A second switch plate 39 is slidably connected to the control cylinder 16; First, in the initial state, the first torsion spring 14, the second torsion spring 44, and the third spring 46 are not deformed. The sealing plate 48 is located in the collection groove 47. The cleaning cloth is sleeved on the outer side of the arc plate 12 through an elastic cloth. During the operation of the arc plate 12, the cleaning cloth will not displace relative to the arc plate 12. Therefore, the cleaning cloth and the arc plate 12 are in a fixed connection state. During long-term use, the cleaning cloth can be replaced manually. Secondly, during the up and down movement of the moving frame 6, the moving frame 6 drives the fixed plate 18 and the stepped plate 37 to move up and down. During the up and down movement of the stepped plate 37, when the stepped plate 37 abuts against the triangular plate 42, since the triangular plate 42 is integrally connected to the control cylinder 16 through the second torsion spring 44 and the clamping plate 40, and there is a certain delay in the spring connection. Therefore, when the triangular plate 42 abuts against the stepped plate 37, it will first cause the triangular plate 42 and the rotating shaft 41 to rotate integrally relative to the clamping plate 40, and then drive the control cylinder 16 to rotate. At this time, the first torsion spring 14 is deformed until the stepped plate 37 and the triangular plate 42 are disconnected. At this time, under the action of the first torsion spring 14 and the second torsion spring 44, the control cylinder 16 returns to its original position relative to the filter box 4 until the triangular plate 42 abuts against the stepped plate 37 again. During the above working process, when the triangular plate 42 and the rotating shaft 41 rotate integrally relative to the clamping plate 40, the triangular plate 42 drives the inclined plate 43 to rotate. The inclined plate 43 abuts against the second switch plate 39 and drives the second switch plate 39 to move. The second switch plate 39 abuts against the first switch plate 38 and drives the first switch plate 38 to move. The first switch plate 38 abuts against the conical cylinder 45 and drives the sealing plate 48 to move upward relative to the collection groove 47. The collection groove 47 is opened, and the substances in the air inlet pipe 2 can enter the collection groove 47. Furthermore, the pollutants in the air inlet pipe 2 can enter the collection groove 47. Furthermore, not only can the inner wall of the air inlet pipe 2 be cleaned by rotation, but also the collection operation of pollutants can be formed, maintaining the cleanliness of the air inlet pipe 2 and finally improving the sampling effect.

[0016] A rotating assembly is installed in the moving frame 6. The rotating assembly includes a plurality of rotating rods 10 that rotate through the moving frame 6. A plurality of rotating plates 11 are fixedly connected to the outer side of each rotating rod 10. A gear 19 is fixedly connected to the lower side of each rotating rod 10. Adjacent two gears 19 are meshed with each other. A first rack 20 is slidably connected to the lower side of the moving frame 6. The first rack 20 is meshed with one of the gears 19. A first connecting rod 21 is fixedly connected to the outer side of the first rack 20. A control frame 13 is slidably connected in the filter box 4. The first connecting rod 21 slidably penetrates through the control frame 13. A toothed ring is fixedly connected to the outer side of the control cylinder 16. A second rack 35 is meshed with the outer side of the toothed ring. The second rack 35 is fixedly connected to the control frame 13 through a second connecting rod 34; First, during the back-and-forth rotation of the control board 17 and the control cylinder 16, the control cylinder 16 drives the toothed ring to rotate back and forth. The toothed ring drives the second rack 35 to move back and forth. The second rack 35 drives the control frame 13 to move back and forth through the second connecting rod 34. The control frame 13 drives the first connecting rod 21 and the first rack 20 to move back and forth relative to the moving frame 6. The first rack 20 drives the meshing gear 19 to rotate, thereby causing all the gears 19 to rotate. The gear 19 drives the rotating rod 10 and the rotating plate 11 to rotate. The rotating plate 11 abuts against the adsorbent material located in the moving frame 6, causing the adsorbent material to move relative to the moving frame 6. When using the adsorbent material to adsorb impurities in the sampled air, based on Figure 4 the direction, the flow direction of the sampled air is from left to right. More impurities are adsorbed by the adsorbent material on the left side in the moving frame 6, while less impurities are adsorbed by the adsorbent material on the right side in the moving frame 6. During long-term use, it will cause the local saturation of the left-side adsorbent material to be too fast. However, in this device, the adsorbent material will move, and the adsorbent materials on both the left and right sides will move, reducing the possibility of the local saturation of the adsorbent material being too fast. Furthermore, the adsorption effect of the adsorbent material can be maximally exerted, thereby improving the sampling effect.

[0017] A knocking assembly is installed outside the moving frame 6. The knocking assembly includes a right-angle rod 27 fixedly installed on the upper side of the first connecting rod 21. The right-angle rod 27 slidably penetrates through the fixing plate 18. One end of the right-angle rod 27 is fixedly connected to a convex plate 28. A limiting plate 29 is fixedly connected to the side wall of the fixing plate 18. A knocking rod 30 is slidably connected to the side wall of the limiting plate 29. One end of the knocking rod 30 is fixedly connected to a knocking head 31. The other end of the knocking rod 30 is fixedly connected to a knocking plate 33. A first spring 32 is fixedly connected between the knocking plate 33 and the limiting plate 29; First, during the back-and-forth movement of the first connecting rod 21 relative to the moving frame 6, the first connecting rod 21 drives the right-angle rod 27 to move. The right-angle rod 27 drives the convex plate 28 to move. Under the action of the first spring 32, the convex plate 28 always abuts against the knocking plate 33. Therefore, during the movement of the convex plate 28, the knocking plate 33, the knocking rod 30, and the knocking head 31 as a whole will move back and forth relative to the limiting plate 29. The knocking head 31 abuts against the filter net 7, forming a knocking effect on the filter net 7, reducing the possibility of dust sticking to the filter net 7, keeping the filter net 7 in an overall working state, and reducing the adverse impact on gas flow.

[0018] A connecting frame 26 is fixedly connected to the outside of the knocking plate 33. A moving ring 22 is fixedly connected to the outside of a plurality of square rods 23. A second spring 24 is fixedly connected between the moving ring 22 and the rotating ring 15. A connecting plate 25 is fixedly connected to the side wall of the moving ring 22. The connecting frame 26 slidably penetrates through the connecting plate 25; Moreover, during this process, when the knocking plate 33, the knocking rod 30, and the knocking head 31 move back and forth as a whole, the knocking plate 33 will also drive the moving ring 22 to move back and forth through the connecting frame 26. While the moving ring 22 causes the second spring 24 to deform, the moving ring 22 will drive the arc-shaped plate 12 to move back and forth through the square rod 23, that is, based on the direction of Figure 4 , when the moving frame 6 moves up and down, the arc-shaped plate 12 will not only rotate, but also move back and forth left and right, thereby improving the cleaning effect on the inner wall of the intake pipe 2. Figure 4 Based on this direction, when the moving frame 6 moves up and down, the arc-shaped plate 12 will not only rotate, but also move back and forth left and right, thereby improving the cleaning effect on the inner wall of the intake pipe 2.

[0019] In the present invention, before the sampling operation, an appropriate amount of adsorbent, such as block activated carbon, is first placed into the moving frame 6. Then, the hydraulic cylinder 8 is started, and the hydraulic cylinder 8 drives the moving frame 6 to move until the filter screens 7 on the side walls of the moving frame 6 are respectively opposite to the sampling pipe 3 and the intake pipe 2. At this time, the telescopic baffle 9 is located below the sampling pipe 3, and the whole moving device reaches the appropriate sampling position. The pump body 5 is started, so that the air in the sampling space enters the sampling pipe 3 along the direction of intake pipe 2 - filter screen 7 - adsorbent - filter screen 7 until the air content in the sampling pipe 3 meets the working requirements. Then, the pump body 5 is closed, and the hydraulic cylinder 8 is started again to drive the moving frame 6 to move upward. The moving frame 6 drives the telescopic baffle 9 to extend upward through the connecting rod until the telescopic baffle 9 closes the sampling pipe 3, and finally the gas sampling operation is completed. After the sampling operation is completed, when it is necessary to detect the gas, the above-mentioned opposite operations can be repeated to discharge the gas in the sampling pipe 3. All of the above are prior arts and will not be elaborated further. During the up-and-down movement of the moving frame 6, the moving frame 6 drives the fixed plate 18 and the stepped plate 37 to move up and down. During the up-and-down movement of the stepped plate 37, when the stepped plate 37 abuts against the triangular plate 42, since the triangular plate 42 is integrally connected to the control cylinder 16 through the second torsion spring 44 and the clamping plate 40, and there is a certain time delay in the spring connection. Therefore, when the triangular plate 42 abuts against the stepped plate 37, it will first cause the triangular plate 42 and the rotating shaft 41 to rotate integrally relative to the clamping plate 40, and then drive the control cylinder 16 to rotate. At this time, the first torsion spring 14 is deformed until the connection between the stepped plate 37 and the triangular plate 42 is disconnected. At this time, under the action of the first torsion spring 14 and the second torsion spring 44, the control cylinder 16 returns to its original position relative to the filter box 4 until the triangular plate 42 abuts against the stepped plate 37 again. During the above working process, when the triangular plate 42 and the rotating shaft 41 rotate integrally relative to the clamping plate 40, the triangular plate 42 drives the inclined plate 43 to rotate. The inclined plate 43 abuts against the second switch plate 39 and drives the second switch plate 39 to move. The second switch plate 39 abuts against the first switch plate 38 and drives the first switch plate 38 to move. The first switch plate 38 abuts against the conical cylinder 45 and drives the sealing plate 48 to move upward relative to the collection tank 47. The collection tank 47 is opened, and the substances in the intake pipe 2 can enter the collection tank 47. Thus, the pollutants in the intake pipe 2 can enter the collection tank 47. This can not only complete the rotational cleaning effect on the inner wall of the intake pipe 2, but also form the collection operation of the pollutants, maintain the cleanliness of the intake pipe 2, and ultimately improve the sampling effect; During the back-and-forth rotation of the control board 17 and the control cylinder 16, the control cylinder 16 drives the toothed ring to rotate back and forth. The toothed ring drives the second rack 35 to move back and forth. The second rack 35 drives the control frame 13 to move back and forth through the second connecting rod 34. The control frame 13 drives the first connecting rod 21 and the first rack 20 to move back and forth relative to the moving frame 6. The first rack 20 drives the meshing gear 19 to rotate, thereby causing all the gears 19 to rotate. The gears 19 drive the rotating rod 10 and the rotating plate 11 to rotate. The rotating plate 11 abuts against the adsorption substance located in the moving frame 6, thereby maximizing the adsorption effect of the adsorption substance and improving the sampling effect; During the back-and-forth movement of the first connecting rod 21 relative to the moving frame 6, the first connecting rod 21 drives the right-angle rod 27 to move. The right-angle rod 27 drives the convex plate 28 to move. Under the action of the first spring 32, the convex plate 28 always abuts against the knocking plate 33. Therefore, during the movement of the convex plate 28, it will cause the knocking plate 33, the knocking rod 30 and the knocking head 31 to move back and forth relative to the limiting plate 29 as a whole. The knocking head 31 abuts against the filter net 7, forming a knocking effect on the filter net 7, reducing the possibility of dust sticking to the filter net 7, keeping the filter net 7 in an overall working state, and reducing the adverse impact on gas flow; During this process, when the knocking plate 33, the knocking rod 30, and the knocking head 31 move back and forth as a whole, the knocking plate 33 will also drive the moving ring 22 to move back and forth through the connecting frame 26. While the moving ring 22 causes the second spring 24 to deform, the moving ring 22 will drive the arc-shaped plate 12 to move back and forth through the square rod 23, that is, based on the Figure 4 direction, when the moving frame 6 moves up and down, the arc-shaped plate 12 will not only rotate, but also move back and forth left and right, thereby improving the cleaning effect on the inner wall of the intake pipe 2.

Claims

1. A sampling device for gas detection, comprising a housing (1), characterized in that, A sampling component is installed inside the housing (1). The sampling component includes a sampling tube (3). The housing (1) is fixedly connected to a pump body (5), and the pump body (5) is communicated with the sampling tube (3). The housing (1) is fixedly connected to an air inlet pipe (2), and a filter box (4) is fixedly connected between the air inlet pipe (2) and the sampling tube (3). A moving frame (6) is slidably connected in the filter box (4). A hydraulic cylinder (8) is fixedly installed in the filter box (4). The moving frame (6) is fixedly connected to two filter nets (7). The moving frame (6) is fixedly connected to a telescopic baffle (9). A control cylinder (16) is rotatably installed in the filter box (4). A first torsion spring (14) is fixedly connected between the control cylinder (16) and the filter box (4). The control cylinder (16) is fixedly connected to a rotating ring (15). A plurality of square rods (23) are slidably connected to the rotating ring (15). Each square rod (23) is fixedly connected to an arc-shaped plate (12). The moving frame (6) is fixedly connected to a fixing plate (18). The fixing plate (18) is fixedly connected to a stepped plate (37). The control cylinder (16) is fixedly connected to a clamping plate (40). The clamping plate (40) is rotatably connected to a rotating shaft (41). The rotating shaft (41) is fixedly connected to a triangular plate (42). A second torsion spring (44) is fixedly connected between the triangular plate (42) and the clamping plate (40).

2. The sampling device for gas detection according to claim 1, wherein, A collecting component is installed on the lower arc-shaped plate (12). The collecting component includes a collecting groove (47) opened on the lower arc-shaped plate (12). A sealing plate (48) is slidably connected to the collecting groove (47). A third spring (46) is fixedly connected between the sealing plate (48) and the collecting groove (47). The sealing plate (48) is fixedly connected to a conical cylinder (45). A first switch plate (38) is slidably connected to the collecting groove (47). The triangular plate (42) is fixedly connected to an inclined plate (43). A second switch plate (39) is slidably connected to the control cylinder (16).

3. A sampling device for gas detection according to claim 1, characterized in that, A rotating component is installed inside the moving frame (6). The rotating component includes a plurality of rotating rods (10) rotatably penetrating the moving frame (6). Each rotating rod (10) is fixedly connected to a plurality of rotating plates (11). Each rotating rod (10) is fixedly connected to a gear (19). Adjacent two gears (19) are meshed with each other. A first rack (20) is slidably connected to the moving frame (6). The first rack (20) is meshed with one of the gears (19). The first rack (20) is fixedly connected to a first connecting rod (21). A control frame (13) is slidably connected to the filter box (4). The first connecting rod (21) slidably penetrates the control frame (13). The control cylinder (16) is fixedly connected to a toothed ring. The toothed ring is meshed with a second rack (35). The second rack (35) is fixedly connected to the control frame (13) through a second connecting rod (34).

4. The sampling device for gas detection according to claim 3, wherein, The moving frame (6) is installed with a knocking component. The knocking component includes a right-angle rod (27) fixedly installed on the first connecting rod (21). The right-angle rod (27) slidably penetrates through the fixing plate (18). The right-angle rod (27) is fixedly connected with a protruding plate (28). The fixing plate (18) is fixedly connected with a limiting plate (29). The limiting plate (29) is slidably connected with a knocking rod (30). One end of the knocking rod (30) is fixedly connected with a knocking head (31). The other end of the knocking rod (30) is fixedly connected with a knocking plate (33). A first spring (32) is fixedly connected between the knocking plate (33) and the limiting plate (29).

5. The sampling device for gas detection according to claim 4, wherein, The knocking plate (33) is fixedly connected with a connecting frame (26). A plurality of the square rods (23) are commonly fixedly connected with a moving ring (22). A second spring (24) is fixedly connected between the moving ring (22) and the rotating ring (15). The moving ring (22) is fixedly connected with a connecting plate (25). The connecting frame (26) slidably penetrates through the connecting plate (25).

6. The sampling device for gas detection according to claim 1, characterized in that, A display component is fixedly connected to the outer side of the housing (1). A shock-absorbing bracket is fixedly connected to the lower side of the housing (1).

7. The sampling device for gas detection according to claim 1, characterized in that, Radiating fans are fixedly connected to both sides of the housing (1). Radiating plates are also fixedly connected to both sides of the housing (1).

8. A sampling device for gas detection according to claim 1, characterized in that, A box cover is installed on the upper side of the housing (1) through multiple groups of bolts. A pull ring is fixedly connected to the upper side of the box cover.

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