A hydrogen sulfide production detection device

Abstract

The application relates to the technical field of hydrogen sulfide detection, and discloses a hydrogen sulfide production detection device which comprises a detector main body, a zero-residual gas exchange mechanism is arranged at the connecting end of the detector main body and is used for removing residual gas after each detection; the zero-residual gas exchange mechanism comprises a detection chamber, a detection head is arranged at the top of the inside of the detection chamber, an L-shaped negative pressure suction pipe is arranged at the bottom of the detection chamber, one end of the negative pressure suction pipe is communicated with the detection chamber, and the other end of the negative pressure suction pipe extends to a hydrogen sulfide gas flow path; a calibration expansion seat is arranged in the detection chamber and located directly below the detection head, and is connected with external gas supply equipment of the detector main body; the zero-residual gas exchange mechanism is arranged, and in particular, a two-stage expansion mechanism of the calibration expansion seat is adopted, so that the residual gas in the detection chamber is completely removed, the detection head is tightly adhered to in the first stage of vertical expansion, the purity of the calibration process is ensured, and external gas interference is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the field of hydrogen sulfide detection, in particular to a hydrogen sulfide production detection device. BACKGROUND

[0002] Hydrogen sulfide is a gas, which is widely present in the production processes of petroleum, chemical industry, natural gas and the like, and leakage or concentration exceeding the standard of the hydrogen sulfide may cause serious harm to the safety of personnel life and the environment, therefore, it is crucial to detect the hydrogen sulfide gas in real time and accurately.

[0003] In the continuous detection process of the existing hydrogen sulfide detection device, the gas left over from the previous detection may be left in the detection chamber, so that the detection result is inaccurate, and especially when the gas concentration changes greatly, the interference of the left-over gas on the subsequent detection is more obvious. SUMMARY

[0004] The application provides a hydrogen sulfide production detection device, which solves the technical problem that in the related art, the gas left over from the previous detection may be left in the detection chamber, so that the detection result is inaccurate, and especially when the gas concentration changes greatly, the interference of the left-over gas on the subsequent detection is more obvious.

[0005] The application provides a hydrogen sulfide production detection device, which comprises a detector main body, a zero-residual gas exchange mechanism is arranged at the connecting end of the detector main body and used for removing the left-over gas after each detection, and the zero-residual gas exchange mechanism comprises:

[0006] a detection chamber, a detection head is arranged at the top of the detection chamber, an L-shaped negative pressure suction pipe is arranged at the bottom of the detection chamber, one end of the negative pressure suction pipe is communicated with the detection chamber, and the other end of the negative pressure suction pipe extends to a hydrogen sulfide gas flow path;

[0007] a calibration expansion seat is arranged in the detection chamber and located directly below the detection head, and is connected with an external gas supply equipment of the detector main body;

[0008] After the calibration expansion seat is injected with gas, the calibration expansion seat is first vertically expanded to closely fit the detection head, calibration gas is sprayed through a standard gas spray outlet at the top center of the calibration expansion seat, the calibration expansion seat is horizontally expanded until the detection chamber is filled when the injection is continuously performed, and the left-over gas in the detection chamber is sucked and discharged through the negative pressure suction pipe in cooperation with the negative pressure generated by the hydrogen sulfide gas flow.

[0009] The expansion process of the calibration expansion seat is divided into two stages: the first stage is vertical expansion for calibrating the detection head, and the second stage is horizontal expansion for realizing the gas replacement in the detection chamber in cooperation with the negative pressure suction.

[0010] Further, the zero-residual ventilation mechanism further comprises a retracted base, the diameter of the retracted base is smaller than the inner diameter of the detection chamber, the bottom of the retracted base is fixedly provided with an air inlet plate, a plurality of air inlet holes are formed in the air inlet plate, and the outer ring of the air inlet plate is fixedly connected with the inner wall of the detection chamber.

[0011] Further, the calibration expansion seat comprises an expansion rubber tube, elastic bands and a matching head plate, the outer wall of the expansion rubber tube is arrayed with a plurality of elastic bands, the top of the expansion rubber tube is fixedly provided with the matching head plate, the matching head plate is in an integral structure with the expansion rubber tube, and the expansion rubber tube is fixed in the retracted base.

[0012] Further, the air inlet end of the expansion rubber tube is provided with a standard gas injection pipe, the air inlet end of the standard gas injection pipe is connected with a gas supply device, a standard gas injection outlet is arranged at the center position of the matching head plate, the air inlet end of the standard gas injection outlet is connected with a gas injection pipe, the gas injection pipe is wired along the inside of the standard gas injection pipe until the outside of the detection chamber.

[0013] Further, the inner upper wall and the inner lower wall of the matching head plate are fixedly provided with supporting plates, a plurality of supporting air columns are arrayed between the two supporting plates, the plurality of supporting air columns are communicated with each other, the supporting air columns are hollow structures, and the air inlet end of the supporting air columns is arranged on the inner wall of the standard gas injection outlet as a residual removal hole.

[0014] Further, the diameter of the matching head plate is greater than the diameter of the detection head, the diameter of the expansion rubber tube in the vertical expansion state is greater than the diameter of the matching head plate, and the centers of the matching head plate, the expansion rubber tube and the retracted base are all aligned with the center of the detection head.

[0015] Further, the negative pressure suction pipe penetrates through the air inlet plate, the air inlet end of the negative pressure suction pipe is slidably provided with a lifting head, a plurality of suction holes are formed in the outer wall of the lifting head for sucking the gas in the detection chamber.

[0016] Further, the inner wall of the plurality of suction holes is fixedly provided with air resistance bags, the top wall of the lifting head is fixedly provided with an air bag, and the air bag is communicated with the plurality of air resistance bags.

[0017] Further, a force arm is fixedly arranged on the side of the lifting head close to the detection head, the force arm is in a Z-shaped structure, and the calibration expansion seat pushes the force arm to rise when expanding, so that the lifting head rises to the highest position of the detection chamber.

[0018] Further, a plurality of elastic ropes are arranged on the inner wall of the negative pressure suction pipe, the two ends of the plurality of elastic ropes are fixedly connected with the inner wall of the negative pressure suction pipe, the middle section of the elastic rope is in a relaxed state, a wind-following swing rope is fixedly arranged on the air outlet end of the negative pressure suction pipe, and a plurality of counterweight balls are fixedly arranged on the wind-following swing rope.

[0019] The beneficial effects of the present application are as follows:

[0020] The application realizes thorough removal of residual gas in the detection chamber by setting a zero residual ventilation mechanism, especially a two-stage expansion mechanism with a calibrated expansion seat, the first stage vertically expands to tightly fit the detection head, ensuring the purity of the calibration process and avoiding external gas interference, and the second stage expands horizontally to fill the detection chamber, combined with the suction effect of the negative pressure suction pipe, which can efficiently and thoroughly replace the gas in the detection chamber, thereby ensuring the accuracy of each detection and avoiding the interference of residual gas on the detection result.

[0021] The negative pressure suction pipe uses the negative pressure generated by the flow of hydrogen sulfide gas for suction, without the need for an additional power source, simple structure, low energy consumption, and significant suction effect, which helps to quickly exhaust the gas in the detection chamber, accelerates the entry of new gas, and improves the detection response speed. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall structure schematic diagram of the application;

[0023] Figure 2 is the main structure schematic diagram of the detector main body of the application;

[0024] Figure 3 is the internal structure schematic diagram of the detection chamber of the application;

[0025] Figure 4 is the Figure 3 is the enlarged schematic diagram of A in the application;

[0026] Figure 5 is the structure schematic diagram of the calibrated expansion seat of the application;

[0027] Figure 6 is the full expansion structure schematic diagram of the expansion rubber cylinder of the application;

[0028] Figure 7 is the internal structure schematic diagram of the negative pressure suction pipe of the application;

[0029] Figure 8 is the structure schematic diagram of the standard gas outlet of the application;

[0030] Figure 9 is the structure schematic diagram of the adapter head plate of the application;

[0031] Figure 10 is the internal structure schematic diagram of the adapter head plate of the application.

[0032] In the diagram: 11. Main body of the detector; 2. Zero-residue ventilation mechanism; 21. Detection chamber; 22. Collapsible base; 23. Calibration expansion seat; 231. Expansion sleeve; 232. Elastic band; 233. Head adjustment plate; 24. Standard gas injection pipe; 25. Air inlet plate; 26. Air inlet hole; 27. Standard gas nozzle outlet; 28. Gas injection pipe; 29. ​​Supporting air column; 201. Support plate; 202. Residue removal hole; 31. Negative pressure suction pipe; 32. Wind-following swing rope; 33. Lifting head; 34. Airbag; 35. Suction hole; 36. Air-blocking bag; 37. Counterweight ball; 38. Elastic rope; 39. Force arm. Detailed Implementation

[0033] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0034] like Figure 1 - Figure 10 As shown, a hydrogen sulfide production detection device includes: a detector body 11, and a zero-residue gas exchange mechanism 2 is provided at the connection end of the detector body 11 for removing residual gas after each detection; the zero-residue gas exchange mechanism 2 includes:

[0035] The detection chamber 21 has a probe head at the top and an L-shaped negative pressure suction pipe 31 at the bottom. One end of the negative pressure suction pipe 31 is connected to the detection chamber 21, and the other end extends to the hydrogen sulfide gas flow path.

[0036] The calibration expansion seat 23 is set inside the detection chamber 21 and located directly below the probe head, and is connected to the external air supply equipment of the main body of the detector 11;

[0037] After the calibration expansion seat 23 is filled with gas, it first expands vertically to fit tightly against the probe head, and then sprays calibration gas through the standard gas outlet 27 at the top center. While continuously filling with gas, it expands horizontally until it fills the detection chamber 21. At the same time, in conjunction with the negative pressure generated by the flow of hydrogen sulfide gas, the residual gas in the detection chamber 21 is sucked out through the negative pressure suction pipe 31.

[0038] The expansion process of the calibration expansion seat 23 is divided into two stages: the first stage is vertical expansion to complete the calibration of the probe head, and the second stage is horizontal expansion combined with negative pressure suction to achieve gas replacement in the detection chamber 21.

[0039] Zero residual gas exchange mechanism 2: through two-stage expansion design, the first stage vertical expansion ensures the accurate injection of calibration gas to the probe head, improving the calibration accuracy; the second stage transverse expansion cooperates with negative pressure suction to realize the complete replacement of gas in the detection chamber 21, avoid the interference of residual gas on subsequent detection, and ensure the detection reliability.

[0040] The zero residual gas exchange mechanism 2 further comprises a collapsed base 22, the diameter of the collapsed base 22 is smaller than the internal diameter of the detection chamber 21, the bottom of the collapsed base 22 is fixedly provided with an air inlet plate 25, a plurality of air inlet holes 26 are formed in the air inlet plate 25, and the outer ring of the air inlet plate 25 is fixedly connected with the inner wall of the detection chamber 21.

[0041] The calibration expansion seat 23 comprises an expansion rubber cylinder 231, elastic bands 232 and a suitable head plate 233, the outer wall of the expansion rubber cylinder 231 is arrayed with a plurality of elastic bands 232, the top of the expansion rubber cylinder 231 is fixedly provided with the suitable head plate 233, the suitable head plate 233 is in an integral structure with the expansion rubber cylinder 231, and the expansion rubber cylinder 231 is fixed in the collapsed base 22.

[0042] The calibration expansion seat 23 and the suitable head plate 233: the diameter of the suitable head plate 233 is greater than that of the probe head, cooperates with the supporting air column 29 and the residual removal hole 202, and removes the residual gas at the standard gas injection outlet 27 through negative pressure suction during expansion, so as to prevent the mixing of calibration gas and residual gas, and improve the calibration accuracy.

[0043] The air inlet end of the expansion rubber cylinder 231 is provided with a standard gas injection pipe 24, the air inlet end of the standard gas injection pipe 24 is connected with a gas supply device, the standard gas injection outlet 27 is arranged at the center position of the suitable head plate 233, the air inlet end of the standard gas injection outlet 27 is connected with a gas injection pipe 28, the gas injection pipe 28 is wired along the inside of the standard gas injection pipe 24, and extends to the outside of the detection chamber 21.

[0044] The inner upper wall and the inner lower wall of the suitable head plate 233 are fixedly provided with supporting plates 201, a plurality of supporting air columns 29 are arrayed between the two supporting plates 201, the plurality of supporting air columns 29 are communicated with each other, the supporting air column 29 is a hollow structure, and the air inlet end of the supporting air column 29 is arranged on the inner wall of the standard gas injection outlet 27, which is a residual removal hole 202.

[0045] The diameter of the suitable head plate 233 is greater than that of the probe head, the diameter of the expansion rubber cylinder 231 in the vertical expansion state is greater than that of the suitable head plate 233, and the centers of the suitable head plate 233, the expansion rubber cylinder 231 and the collapsed base 22 are all aligned with the center of the probe head.

[0046] The negative pressure suction pipe 31 penetrates through the air inlet plate 25, the air inlet end of the negative pressure suction pipe 31 is slidably provided with a lifting head 33, a plurality of suction holes 35 are formed in the outer wall of the lifting head 33, and the lifting head 33 is used for sucking the gas in the detection chamber 21.

[0047] The negative pressure suction pipe 31 cooperates with the L-shaped lifting head 33 to generate negative pressure caused by hydrogen sulfide gas flow, and actively sucks the gas in the detection chamber 21; the lifting head 33 rises with the calibrated expansion seat 23, and the air bag 34 cooperates with the air blocking bag 36 to block the suction hole 35, so as to avoid backflow of external gas during calibration and maintain the sealing of the detection chamber 21.

[0048] The converging base 22 cooperates with the air inlet plate 25; the air inlet plate 25 has a smaller diameter than the detection chamber 21, cooperates with the air inlet hole 26 to uniformly guide the to-be-detected gas, and reduces airflow turbulence; and the converging base 22 fixes the calibrated expansion seat 23 to ensure that the expansion direction is vertical and improve the structural stability.

[0049] The inner wall of each of the plurality of suction holes 35 is fixedly provided with an air blocking bag 36, and the top wall of the lifting head 33 is fixedly provided with an air bag 34, which communicates with the plurality of air blocking bags 36.

[0050] The side of the lifting head 33 close to the detection head is fixedly provided with a force receiving arm 39, which is in a Z shape; when the calibrated expansion seat 23 expands, the force receiving arm 39 is pushed to rise, so that the lifting head 33 rises to the highest position of the detection chamber 21.

[0051] The inner wall of the negative pressure suction pipe 31 is provided with a plurality of elastic ropes 38, both ends of the plurality of elastic ropes 38 are fixedly connected with the inner wall of the negative pressure suction pipe 31, and the middle section of the elastic rope 38 is in a relaxed state; the air outlet end of the negative pressure suction pipe 31 is fixedly provided with a wind-driven swinging rope 32, and the wind-driven swinging rope 32 is fixedly provided with a plurality of counterweight balls 37.

[0052] The wind-driven swinging rope 32 cooperates with the elastic rope 38; the counterweight balls 37 are driven by gas flow to impact the inner wall of the negative pressure suction pipe 31, the elastic rope 38 is hit by airflow to beat the pipe wall, which automatically cleans the residues in the pipeline, and prolongs the service life of the equipment.

[0053] In use, the detection instrument main body 11 is installed on the hydrogen sulfide production conveying pipeline, at this time, the detection chamber 21 and the hydrogen sulfide production conveying pipeline are in communication with each other, and the negative pressure suction pipe 31 is directed to the flow direction of the gas in the hydrogen sulfide production conveying pipeline;

[0054] The hydrogen sulfide gas passes through the plurality of air inlet holes 26 into the detection chamber 21, and the detection head is located in the detection chamber 21; when the detection instrument main body 11 detects the hydrogen sulfide gas, the detection head detects the gas entering the detection chamber 21; in this process, the gas in the hydrogen sulfide production conveying pipeline flows at high speed through the negative pressure suction pipe 31, at this time, a pressure difference is formed in the negative pressure suction pipe 31, thereby generating a certain suction force on the gas in the detection chamber 21, so as to suck out the gas in the detection chamber 21, which is conducive to the entry of fresh gas.

[0055] When the detection is completed, the original gas in the detection chamber 21 is gradually sucked out by the negative pressure suction pipe 31, and the gas is also replenished into the detection chamber 21, so that the detection chamber 21 is filled with new gas every time.

[0056] When the probe head needs to be calibrated, the gas injection device outside the detection chamber 21 first injects gas into the inflatable rubber tube 231, so that the inflatable rubber tube 231 gradually expands. With the increase of the gas, the inflatable rubber tube 231 expands from the inside of the folding base 22 and rises until the head plate 233 tightly adheres to the lower wall of the probe head. At this time, the inflatable rubber tube 231 is resisted, and with the continuous injection of gas, the inflatable rubber tube 231 continues to expand and gradually fills the entire detection chamber 21, preventing new hydrogen sulfide gas from entering the detection chamber 21, and at the same time, the original gas in the detection chamber 21 is squeezed out by the expansion of the inflatable rubber tube 231;

[0057] When the inflatable rubber tube 231 is tightly attached to the probe head, the standard gas outlet 27 has a certain space with the lower wall of the probe head. At the same time, the head plate 233 is inflated, and the two support plates 201 lengthen the several raised air columns 29, so that the original gas in the standard gas outlet 27 is sucked into the several raised air columns 29 through the several residual holes 202. At this time, it is ensured that the original gas is completely cleaned, and then the gas injection pipe 28 is injected with the gas used for calibration by the external gas supply device.

[0058] When the inflatable rubber tube 231 expands upward, it reaches the position of the force arm 39 and pushes the lifting head 33 to rise with the inflatable rubber tube 231, and the suction hole 35 rises with the lifting head 33, which is beneficial to the extraction of the gas at the top of the detection chamber 21. Until the lifting head 33 is tightly attached to the upper wall of the detection chamber 21, the gas in the air bag 34 is squeezed into the air resistance bag 36, so that it expands and blocks the suction hole 35, cutting off the external suction force and reducing the replenishment of new gas.

[0059] After calibration, the gas in the inflatable rubber tube 231 is extracted to make it shrink, and the inflatable rubber tube 231 is pulled back into the folding base 22 by the elastic band 232, and the old gas sucked into the raised air column 29 is sprayed out, which does not affect the subsequent detection.

[0060] When the gas passes through the inside and outside of the negative pressure suction pipe 31, the wind-swinging rope 32 swings with the gas flow, the counterweight ball 37 hits the inner wall of the negative pressure suction pipe 31, and the elastic rope 38 is also hit on the inner wall of the negative pressure suction pipe 31 under the impact of the gas, which can also clean the negative pressure suction pipe 31.

[0061] Working steps:

[0062] Installation and communication: install the detector main body 11 on the hydrogen sulfide production pipeline, make the detection chamber 21 communicate with the pipeline, and make the negative pressure suction pipe 31 face the gas flow direction, so as to ensure the smoothness of the gas flow path.

[0063] Normal detection: hydrogen sulfide gas enters the detection chamber 21 through the gas inlet hole 26, and the probe head detects the gas concentration in real time; the negative pressure suction pipe 31 uses the negative pressure suction of gas flow to suck the gas in the detection chamber 21, and promotes the continuous supplement of fresh gas.

[0064] Residual gas removal: after detection, the negative pressure suction pipe 31 continues to suck, combined with the natural flow of gas, to remove the residual gas in the detection chamber 21 and prepare a clean environment for the next detection.

[0065] Probe head calibration: the gas supply equipment injects gas into the calibration expansion seat 23, the first stage vertical expansion makes the probe head plate 233 tightly contact with the probe head, and the standard gas jet outlet 27 sprays calibration gas; the second stage transverse expansion fills the detection chamber 21, cooperates with the negative pressure suction to completely replace the residual gas, and supports the air column 29 to remove the standard gas jet outlet 27 residual through the residual hole 202.

[0066] Calibration reset: discharge the gas in the calibration expansion seat 23, the elastic band 232 pulls it back to the integrated base 22, the air column 29 releases the inhaled old gas; the lifting head 33 descends with the contraction of the calibration expansion seat 23, the air bag 34 and the air resistance bag 36 return to the original state, the suction hole 35 is unblocked, and the detection chamber 21 returns to the detection state.

[0067] The above describes the embodiments of the present application, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present embodiment, which are all within the protection scope of the present embodiment.

Claims

1. A hydrogen sulfide production detection device, characterized in that, The utility model relates to a zero residual gas exchange mechanism for a detector, which comprises: a detector body (11) provided with a zero residual gas exchange mechanism (2) at its connecting end for removing residual gas after each detection; the zero residual gas exchange mechanism (2) comprises: a detection chamber (21) provided with a probe head at its top and an L-shaped negative pressure suction pipe (31) at its bottom, one end of the negative pressure suction pipe (31) being connected to the detection chamber (21) and the other end extending to a hydrogen sulfide gas flow path; a calibration expansion seat (23) arranged in the detection chamber (21) and located directly below the probe head, which is connected to a gas supply device outside the detector body (11); the zero residual gas exchange mechanism (2) further comprises a folding base (22) provided with an air inlet plate (25) at its bottom; the calibration expansion seat (23) comprises an expansion rubber cylinder (231), elastic bands (232) and a suitable head plate (233), the top of the expansion rubber cylinder (231) being fixedly provided with the suitable head plate (233), and the air inlet end of the expansion rubber cylinder (231) being provided with a standard gas injection pipe (24); the inner upper wall and lower wall of the suitable head plate (233) are both fixedly provided with support plates (201), a plurality of gas supporting columns (29) are arranged between the two support plates (201) and are in communication with each other, the gas supporting columns (29) are hollow structures, and the air inlet end of the gas supporting columns (29) is provided on the inner wall of a standard gas outlet (27) as a residual removal hole (202); the negative pressure suction pipe (31) penetrates through the air inlet plate (25), the air inlet end of the negative pressure suction pipe (31) is slidingly provided with a lifting head (33), and the outer wall of the lifting head (33) is provided with a plurality of suction holes (35) for sucking gas in the detection chamber (21); after the calibration expansion seat (23) is injected with gas, it first expands vertically to closely fit the probe head and sprays calibration gas through the standard gas outlet (27) at the top center, and when the injection of gas continues, it expands horizontally until it fills the detection chamber (21), and at the same time, it is matched with the negative pressure generated by the hydrogen sulfide gas flow to suck and discharge the residual gas in the detection chamber (21) through the negative pressure suction pipe (31); the expansion process of the calibration expansion seat (23) is divided into two stages: the first stage is vertical expansion to calibrate the probe head, and the second stage is horizontal expansion matched with negative pressure suction to realize gas replacement in the detection chamber (21).

2. The hydrogen sulfide production detection device according to claim 1, wherein The diameter of the folding base (22) is smaller than the internal diameter of the detection chamber (21), a plurality of air inlet holes (26) are formed in the air inlet plate (25), and the outer ring of the air inlet plate (25) is fixedly connected to the inner wall of the detection chamber (21).

3. The hydrogen sulfide production detection device according to claim 2, wherein The outer wall of the expansion rubber cylinder (231) is arranged with a plurality of elastic bands (232), the suitable head plate (233) and the expansion rubber cylinder (231) are in an integral structure, and the expansion rubber cylinder (231) is fixed in the folding base (22).

4. The hydrogen sulfide production detection device according to claim 3, wherein The gas injection pipe (24) is connected with the gas supply device, the gas injection pipe (24) is connected with the gas injection pipe (24), and the gas injection pipe (28) is connected with the gas injection pipe (24).

5. The hydrogen sulfide production detection device according to claim 4, wherein The diameter of the probe head is greater than that of the probe head, and the diameter of the probe head is greater than that of the probe head.

6. The hydrogen sulfide production detection device according to claim 5, wherein The inner wall of the suction hole (35) is fixedly provided with a plurality of air resistance bags (36), and the top wall of the lifting head (33) is fixedly provided with an air bag (34).

7. The hydrogen sulfide production detection device according to claim 6, wherein The side of the lifting head (33) close to the probe head is fixedly provided with a force arm (39), the force arm (39) is Z-shaped, the force arm (39) is pushed up when the calibration expansion seat (23) is expanded, and the lifting head (33) is lifted to the highest position of the detection chamber (21).

8. The hydrogen sulfide production detection device according to claim 7, wherein The inner wall of the negative pressure suction pipe (31) is provided with a plurality of elastic ropes (38), the two ends of the elastic rope (38) are fixedly connected with the inner wall of the negative pressure suction pipe (31), and the middle section of the elastic rope (38) is in a relaxed state, the air outlet end of the negative pressure suction pipe (31) is fixedly provided with a wind-driven rope (32), and a plurality of counterweight balls (37) are fixedly arranged on the wind-driven rope (32).

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