An anti-blocking and erosion-resistant pneumatic cut-off valve

Abstract

The present invention discloses an anti-blocking and erosion-resistant pneumatic cut-off valve, which includes a valve body, a filtering mechanism, a cleaning mechanism, a transmission mechanism, a protection mechanism, and a lubrication mechanism. A gland is fixedly installed on the outer surface of the valve body, a bracket is fixedly installed at the top of the gland, a valve stem is fixedly installed inside the valve body, a valve ball is arranged inside the valve body, the valve stem is clamped with the valve ball, a lower shaft is fixedly installed on the lower surface of the valve body, the lower shaft is clamped with the valve ball, a driving device is fixedly installed at the top of the bracket, and the output end of the driving device is fixedly connected to the valve stem. In the anti-blocking and erosion-resistant pneumatic cut-off valve of the present invention, through the alum arranged inside the collection box, impurities in the water can be actively collected, and it is more convenient to clean the impurities. At the same time, the gravity sensor can detect the accumulation of impurities on the surface of the filter screen. When there are too many impurities on the surface of the filter screen and problems occur, the first indicator light will light up at this time, which is convenient to notify the staff to come and deal with it in time.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to an anti-blocking and erosion-resistant pneumatic cut-off valve. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere. In daily life, when transporting natural strange stones, pneumatic cut-off valves are often used. A pneumatic cut-off valve, also known as a pneumatic globe valve, is a kind of actuator in an automation system, which consists of a multi-spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve. It receives the signal of a regulating instrument and controls the cutting off, connection, or switching of the fluid in a process pipeline. It has the characteristics of simple structure, sensitive reaction, reliable operation, etc., and can be widely used in industrial production departments such as petroleum, chemical industry, and metallurgy. The air source of the pneumatic cut-off valve requires filtered compressed air, and the medium flowing through the valve body should be a liquid and gas without impurities and particles.

[0003] The working principle of pneumatic transmission is to use an air compressor to convert the mechanical energy output by an electric motor or other prime movers into the pressure energy of air. Then, under the control of control elements and the cooperation of auxiliary elements, the pressure energy of air is converted into mechanical energy through an actuator, so as to complete linear or rotary motion and do work externally. However, when the existing pneumatic cut-off valve is in use, there are still some problems:

[0004] 1. When the existing pneumatic cut-off valve is in use, after continuous scouring and use for a long time, a large amount of accumulated debris will be generated inside the valve body, which is likely to cause blockage of the pipeline. Moreover, when the debris scours inside the valve, it is easy to damage the pipeline inside the valve. At the same time, when filtering the inside through a filter screen, it is difficult to clean the inside of the valve without closing it, and the cleaning is very inconvenient, which is likely to affect the work efficiency.

[0005] 2. When the existing pneumatic cut-off valve is in use, since the inside of the valve is continuously scoured by water, a large amount of heat will be generated in the valve body after long-term use. It is difficult to cool the valve wall in time. At this time, the high temperature is likely to damage the valve body, and it is also difficult to notify the operator in time to close the valve for maintenance, thus affecting the use of the cut-off valve.

[0006] 3. When the existing pneumatic cut-off valve is in use, a variety of stainless steel materials are used inside the valve, which can make the service life of the valve longer. However, when this valve is used for a long time, a small amount of dust will enter the valve ball and various components inside the valve. When the dust accumulates, it is easy to affect the use of the valve ball. At the same time, when forced to use, it will damage various components such as the valve ball. Summary of the Invention

[0007] The purpose of the present invention is to provide an anti-blocking and erosion-resistant pneumatic cut-off valve to solve the problem that it is difficult to clean the inside of the valve without closing when filtering the inside through a filter screen as proposed in the above-mentioned background technology. The cleaning is very inconvenient and easily affects the work efficiency.

[0008] To achieve the above object, the present invention provides the following technical solution: an anti-blocking and erosion-resistant pneumatic cut-off valve, including a valve body, a filtering mechanism, a cleaning mechanism, a transmission mechanism, a protection mechanism, and a lubrication mechanism. A gland is fixedly installed on the outer surface of the valve body, a bracket is fixedly installed at the top of the gland, a valve stem is fixedly installed inside the valve body, a valve ball is arranged inside the valve body, the valve stem is clamped with the valve ball, a lower shaft is fixedly installed on the lower surface of the valve body, the lower shaft is clamped with the valve ball, a driving device is fixedly installed at the top of the bracket, and the output end of the driving device is fixedly connected to the valve stem;

[0009] The filtering mechanism is arranged at the bottom of the valve body. The filtering mechanism includes a filter screen, a collection box, a gravity sensor, and a first indicator light. The filter screen is fixedly installed inside the valve body, the collection box is fixedly installed on the outer surface of the valve body close to the filter screen, a controller is fixedly installed on the outer surface of the collection box, alum is arranged inside the collection box, the gravity sensor is fixedly installed inside the collection box, a receiving plate is installed at the detection end of the gravity sensor, and the first indicator light is fixedly installed at the top of the collection box. The cleaning mechanism is arranged inside the valve body. The cleaning mechanism includes a fixed frame, a first gear, a round rod, and a scraper. The fixed frame is rotatably installed inside the valve body, the round rod is fixedly installed on the surface of the fixed frame close to the filter screen, and a plurality of the scrapers are fixedly installed on the outer surface of the round rod. The protection mechanism is arranged on the outer surface of the valve body. The protection mechanism includes a box body, a buzzer, a balloon, a first electromagnetic block, a second electromagnetic block, and a sliding plate. The box body is fixedly installed on the outer surface of the valve body, the balloon is fixedly installed on the surface of the box body close to the valve body, the sliding plate is fixedly installed on the outer surface of the balloon, the buzzer is fixedly installed on the outer surface of the box body, the first electromagnetic block is electrically connected to one end of the buzzer, and the second electromagnetic block is electrically connected to the surface of the sliding plate through an external power supply. The lubrication mechanism is arranged on the outer surface of the bracket. The lubrication mechanism includes an oil barrel, an oil-absorbing cotton, and a timer. The oil barrel is fixedly installed on the outer surface of the bracket, the timer is fixedly installed on the outer surface of the oil barrel, and the oil-absorbing cotton is fixedly installed on the outer surface of the valve body close to the valve ball.

[0010] As a preferred technical solution of the present invention, a second indicator light is fixedly installed at the top of the collection box.

[0011] As a preferred technical solution of the present invention, a connecting plate is fixedly installed between the valve body and the collection box, and rubber pads are fixedly installed on the surfaces of the connecting plate close to the valve body and the collection box.

[0012] As a preferred technical solution of the present invention, a second gear is rotatably installed on the outer surface of the valve body, and the second gear is threadedly connected to the first gear.

[0013] As a preferred technical solution of the present invention, a housing is fixedly installed on the outer surface of the valve body, and the second gear is located inside the housing.

[0014] As a preferred technical solution of the present invention, a sealing ring is fixedly installed on the surface of the first gear close to the valve body, and there are two sealing rings.

[0015] As a preferred technical solution of the present invention, the transmission mechanism is arranged on the outer surface of the valve body. The transmission mechanism includes a connecting pipe, a fixing rod, and a water wheel. The connecting pipe is fixedly installed on the outer surface of the valve body. A one-way valve is arranged on the outer surface of the connecting pipe. Both ends of the connecting pipe are communicated with the valve body. The water wheel is rotatably installed on the outer surface of the connecting pipe. The fixing rod is fixedly installed on the outer surface of the water wheel, and the free end of the fixing rod is fixedly connected to the second gear.

[0016] As a preferred technical solution of the present invention, a limiting block is slidably installed on the outer surface of the fixing rod, and the limiting block is fixedly connected to the valve body.

[0017] As a preferred technical solution of the present invention, a telescopic rod and a spring are fixedly installed between the sliding plate and the box body. A pressure sensor is fixedly installed on the outer surface of the driving device. An air inlet pipe is fixedly installed between the pressure sensor and the box body.

[0018] As a preferred technical solution of the present invention, an oil inlet pipe is fixedly installed at the top of the oil barrel. A piston is arranged at the top of the oil inlet pipe. A first pipeline is fixedly installed between the oil barrel and the housing. A second pipeline is fixedly installed between the oil barrel and the oil absorbent cotton. A support rod is fixedly installed between the valve body and the first pipeline.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention is provided with a gravity sensor, a first indicator light, and a collection box. When the valve body is in use, alum is provided inside the collection box, and the dissolved alum in water can adsorb impurities in the water flow. At this time, the collection box actively collects the impurities, making it more convenient to clean the impurities. At the same time, the gravity sensor can detect the accumulation of impurities on the surface of the filter screen. When there are too many impurities on the surface of the filter screen and problems occur, the first indicator light will light up, facilitating timely notification of the staff to come and handle it.

[0021] 2. The present invention is provided with a balloon, a warning light, and a pressure sensor. When the valve body is in use, when the outer wall of the valve body generates high temperature due to long-term scouring by the water flow inside the valve body, the balloon will expand due to heat. When the temperature reaches a certain level, the buzzer will alarm, enabling timely notification of the staff to come and cool it down. At the same time, the pressure sensor can be used to start the driving device, thereby closing the valve, and avoiding damage to the valve caused by long-term high temperature.

[0022] 3. The present invention is provided with an oil barrel, a timer, and absorbent cotton. When the valve body is in use, the output end of the oil barrel is connected to the parts inside the valve. Then, through the setting of the timer, the lubricating oil inside the oil barrel can be continuously introduced onto the surfaces of various parts inside the valve body, realizing lubrication of the parts, avoiding jamming of parts such as the valve ball, which affects the closing and starting of the valve, and improving the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a schematic side view structural diagram of the present invention;

[0025] Figure 3 is a schematic internal structural diagram of the valve body of the present invention;

[0026] Figure 4 is a schematic internal structural diagram of the connecting pipe of the present invention;

[0027] Figure 5 is of the present invention Figure 3 schematic structural diagram of part A therein;

[0028] Figure 6 is a schematic structural diagram of the valve ball of the present invention.

[0029] In the figure: 1. Valve body; 2. Filter mechanism; 201. Filter screen; 202. Gravity sensor; 203. Collection box; 204. First indicator light; 205. Second indicator light; 206. Connecting plate; 3. Cleaning mechanism; 301. First gear; 302. Sealing ring; 303. Fixed bracket; 304. Round rod; 305. Scraper; 306. Second gear; 307. Shell; 4. Transmission mechanism; 401. Fixed rod; 402. Limit block; 403. Connecting pipe; 404. Check valve; 405. Water turbine; 5. Protection mechanism; 501. Pressure sensor; 502. Air inlet pipe; 503. Box body; 504. Buzzer; 505. First electromagnet; 506. Second electromagnet; 507. Slide plate; 508. Balloon; 509. Telescopic rod; 510. Spring; 6. Lubrication mechanism; 601. First pipeline; 602. Support rod; 603. Oil inlet pipe; 604. Timer; 605. Oil barrel; 606. Second pipeline; 607. Oil absorption cotton; 7. Driving device; 8. Bracket; 9. Valve stem; 10. Gland; 11. Valve ball; 12. Lower shaft; 13. Controller. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-6 , the present invention provides a technical solution for an anti-blocking and erosion-resistant pneumatic cut-off valve:

[0032] An anti-blocking and erosion-resistant pneumatic cut-off valve includes a valve body 1, a filter mechanism 2, a cleaning mechanism 3, a transmission mechanism 4, a protection mechanism 5, and a lubrication mechanism 6. A gland 10 is fixedly installed on the outer surface of the valve body 1, a bracket 8 is fixedly installed at the top of the gland 10, a valve stem 9 is fixedly installed inside the valve body 1, a valve ball 11 is arranged inside the valve body 1, the valve stem 9 is clamped with the valve ball 11, a lower shaft 12 is fixedly installed on the lower surface of the valve body 1, the lower shaft 12 is clamped with the valve ball 11, a driving device 7 is fixedly installed at the top of the bracket 8, and the output end of the driving device 7 is fixedly connected to the valve stem 9;

[0033] The filtering mechanism 2 is arranged at the bottom end of the valve body 1. The filtering mechanism 2 includes a filter net 201, a collection box 203, a gravity sensor 202, and a first indicator light 204. The filter net 201 is fixedly installed inside the valve body 1. The collection box 203 is fixedly installed on the outer surface of the valve body 1 close to the filter net 201. A controller 13 is fixedly installed on the outer surface of the collection box 203. Alum is arranged inside the collection box 203. The characteristic that the alum dissolves in water can be used to adsorb impurities in the water flow, so that the impurities flowing through the inside of the valve body 1 can be adsorbed into the collection box 203 by the alum, making it more convenient to clean the impurities filtered inside the valve body 1. The gravity sensor 202 is fixedly installed inside the collection box 203. A material receiving plate is installed at the detection end of the gravity sensor 202. The first indicator light 204 is fixedly installed at the top end of the collection box 203. The cleaning mechanism 3 is arranged inside the valve body 1. The cleaning mechanism 3 includes a fixed frame 303, a first gear 301, a round rod 304, and a scraping plate 305. The fixed frame 303 is rotatably installed inside the valve body 1. The round rod 304 is fixedly installed on the surface of the fixed frame 303 close to the filter net 201. A plurality of scraping plates 305 are fixedly installed on the outer surface of the round rod 304. The protection mechanism 5 is arranged on the outer surface of the valve body 1. The protection mechanism 5 includes a box body 503, a buzzer 504, a balloon 508, a first electromagnet 505, a second electromagnet 506, and a sliding plate 507. The box body 503 is fixedly installed on the outer surface of the valve body 1. The balloon 508 is fixedly installed on the surface of the box body 503 close to the valve body 1. The sliding plate 507 is fixedly installed on the outer surface of the balloon 508. The buzzer 504 is fixedly installed on the outer surface of the box body 503. The first electromagnet 505 is electrically connected to one end of the buzzer 504. The second electromagnet 506 is electrically connected to the surface of the sliding plate 507 through an external power supply. The lubrication mechanism 6 is arranged on the outer surface of the bracket 8. The lubrication mechanism 6 includes an oil barrel 605, an oil absorption cotton 607, and a timer 604. The oil barrel 605 is fixedly installed on the outer surface of the bracket 8. The timer 604 is fixedly installed on the outer surface of the oil barrel 605. The oil absorption cotton 607 is fixedly installed on the outer surface of the valve body 1 close to the valve ball 11, and the oil absorption cotton 607 adsorbs oil to lubricate the parts.

[0034] At the top of the collection box 203, a second indicator light 205 is fixedly installed. A connecting plate 206 is fixedly installed between the valve body 1 and the collection box 203. Rubber pads are fixedly installed on the surfaces of the connecting plate 206 close to the valve body 1 and the collection box 203. A second gear 306 is rotatably installed on the outer surface of the valve body 1. The second gear 306 is threadedly connected to the first gear 301. A housing 307 is fixedly installed on the outer surface of the valve body 1. The second gear 306 is protected through the housing 307. The second gear 306 is located inside the housing 307. A sealing ring 302 is fixedly installed on the surface of the first gear 301 close to the valve body 1. There are two sealing rings 302. The inside of the valve body 1 is sealed through the sealing rings 302. A transmission mechanism 4 is arranged on the outer surface of the valve body 1. The transmission mechanism 4 includes a connecting pipe 403, a fixed rod 401, and a water wheel 405. The connecting pipe 403 is fixedly installed on the outer surface of the valve body 1. A one-way valve 404 is arranged on the outer surface of the connecting pipe 403. Both ends of the connecting pipe 403 communicate with the valve body 1. The water wheel 405 is rotatably installed on the outer surface of the connecting pipe 403. The fixed rod 401 is fixedly installed on the outer surface of the water wheel 405. The free end of the fixed rod 401 is fixedly connected to the second gear 306. A limiting block 402 is slidably installed on the outer surface of the fixed rod 401. The limiting block 402 is fixedly connected to the valve body 1. The stability of the water wheel 405 is increased through the limiting block 402.

[0035] An expansion rod 509 and a spring 510 are fixedly installed between the sliding plate 507 and the box body 503. A pressure sensor 501 is fixedly installed on the outer surface of the driving device 7. An air inlet pipe 502 is fixedly installed between the pressure sensor 501 and the box body 503. An oil inlet pipe 603 is fixedly installed at the top of the oil barrel 605. A piston is arranged at the top of the oil inlet pipe 603. A first pipe 601 is fixedly installed between the oil barrel 605 and the housing 307. A second pipe 606 is fixedly installed between the oil barrel 605 and the oil absorption cotton 607. A support rod 602 is fixedly installed between the valve body 1 and the first pipe 601.

[0036] During the use of the present invention, its working principle is as follows:

[0037] When a pneumatic cut-off valve in a natural gas pipeline is in use, since natural gas also transports other liquid water flows through the natural gas pipeline during transportation, during transportation, a large amount of alum is first provided inside the collection box 203. The alum dissolves in water to adsorb impurities in the water flow. This allows the impurities flowing through the valve body 1 to be adsorbed into the collection box 203 by the alum, making it more convenient to clean the impurities filtered inside the valve body 1. At the same time, when debris accumulates above the gravity sensor 202, the gravity sensor 202 can detect the accumulation of impurities on the surface of the filter screen 201 and the water flow situation inside the valve body 1. When there are too many impurities on the surface of the filter screen 201 and problems occur, the first indicator light 204 will light up at this time, facilitating timely notification to the staff to come and handle it. When no one has handled it for a period of time, the second indicator light 205 will light up at this time. At this time, the one-way valve 404 will open, and the water flow inside the valve body 1 will flow out through the inside of the connecting pipe 403. At this time, the water wheel 405 inside the connecting pipe 403 will rotate. The water wheel 405 will drive the second gear 306 to rotate. The second gear 306 drives the first gear 301 to rotate. The first gear 301 drives the fixed frame 303 to rotate. The fixed frame 303 drives the round rod 304 to rotate. The round rod 304 drives the scraper 305. Through the scraper 305, the inside of the filter screen 201 and the valve body 1 can be mechanically cleaned, realizing automatic cleaning and maintenance of the inside of the valve body 1, making the filtration more convenient and effective.

[0038] When the outer wall of the valve body 1 generates high temperature due to long-term scouring by the water flow inside the valve body 1, the balloon 508 inside the box body 503 will expand due to heat at this time. At this time, the balloon 508 will drive the slide plate 507 to move. The slide plate 507 will drive the spring 510 to be compressed. When the slide plate 507 moves to a certain position, the first electromagnet 505 will be electrically connected to the second electromagnet 506 at this time, and the buzzer 504 will give an alarm, enabling the staff to be called over in time for cooling treatment. At the same time, the air pressure squeezed when the slide plate 507 moves can be exported through the connecting pipe 403 through the air inlet pipe 502. At this time, the pressure sensor 501 can drive the driving device 7 to start, thereby closing the valve and avoiding damage to the valve caused by long-term high temperature.

[0039] When the valve body 1 is in use, through the first pipe 601 and the second pipe 606, the output end of the oil barrel 605 can be connected to the parts inside the valve. Then, through the timer 604 for setting, the lubricating oil inside the oil barrel 605 can be intermittently introduced onto the surfaces of the various parts inside the valve body 1, and adsorbed by the oil-absorbing cotton 607 to lubricate the parts, preventing parts such as the valve ball 11 from getting stuck, thereby affecting the closing and starting of the valve and improving the service life of the valve.

[0040] In the description of the present invention, only the specific preferred embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A pneumatic cut-off valve that prevents blockage and is resistant to erosion, comprising a valve body (1), a filtering mechanism (2), a cleaning mechanism (3), a transmission mechanism (4), a protection mechanism (5), and a lubrication mechanism (6), characterized in that: A gland (10) is fixedly installed on the outer surface of the valve body (1). A bracket (8) is fixedly installed at the top of the gland (10). A valve stem (9) is fixedly installed inside the valve body (1). A valve ball (11) is arranged inside the valve body (1). The valve stem (9) is clamped with the valve ball (11). A lower shaft (12) is fixedly installed on the lower surface of the valve body (1). The lower shaft (12) is clamped with the valve ball (11). A driving device (7) is fixedly installed at the top of the bracket (8). The output end of the driving device (7) is fixedly connected to the valve stem (9); The filtering mechanism (2) is arranged at the bottom end of the valve body (1). The filtering mechanism (2) includes a filter screen (201), a collection box (203), a gravity sensor (202), and a first indicator light (204). The filter screen (201) is fixedly installed inside the valve body (1). The collection box (203) is fixedly installed on the outer surface of the valve body (1) close to the filter screen (201). A controller (13) is fixedly installed on the outer surface of the collection box (203). Alum is arranged inside the collection box (203). The gravity sensor (202) is fixedly installed inside the collection box (203). A material receiving plate is installed at the detection end of the gravity sensor (202). The first indicator light (204) is fixedly installed at the top end of the collection box (203). The cleaning mechanism (3) is arranged inside the valve body (1). The cleaning mechanism (3) includes a fixing frame (303), a first gear (301), a round rod (304), and a scraping plate (305). The fixing frame (303) is rotatably installed inside the valve body (1). The round rod (304) is fixedly installed on the surface of the fixing frame (303) close to the filter screen (201). A plurality of scraping plates (305) are fixedly installed on the outer surface of the round rod (304). The protection mechanism (5) is arranged on the outer surface of the valve body (1). The protection mechanism (5) includes a box body (503), a buzzer (504), a balloon (508), a first electromagnet (505), a second electromagnet (506), and a sliding plate (507). The box body (503) is fixedly installed on the outer surface of the valve body (1). The balloon (508) is fixedly installed on the surface of the box body (503) close to the valve body (1). The sliding plate (507) is fixedly installed on the outer surface of the balloon (508). The buzzer (504) is fixedly installed on the outer surface of the box body (503). The first electromagnet (505) is electrically connected to one end of the buzzer (504). The second electromagnet (506) is electrically connected to the surface of the sliding plate (507) through an external power supply. The lubrication mechanism (6) is arranged on the outer surface of the bracket (8). The lubrication mechanism (6) includes an oil barrel (605), an oil absorbing cotton (607), and a timer (604). The oil barrel (605) is fixedly installed on the outer surface of the bracket (8). The timer (604) is fixedly installed on the outer surface of the oil barrel (605). The oil absorbing cotton (607) is fixedly installed on the outer surface of the valve body (1) close to the valve ball (11).

2. The pneumatic cut-off valve with anti-blocking and erosion-resistant features according to claim 1, characterized in that: A second indicator light (205) is fixedly installed at the top end of the collection box (203).

3. The pneumatic cut-off valve with anti-blocking and erosion-resistant properties according to claim 1, wherein: A connecting plate (206) is fixedly installed between the valve body (1) and the collection box (203). Rubber pads are fixedly installed on the surfaces of the connecting plate (206) close to the valve body (1) and the collection box (203).

4. The pneumatic cut-off valve with anti-blocking and erosion resistance according to claim 1, characterized in that: A second gear (306) is rotatably installed on the outer surface of the valve body (1). The second gear (306) is threadedly connected to the first gear (301).

5. The pneumatic cut-off valve with anti-blocking and erosion-resistant features according to claim 4, wherein: A housing (307) is fixedly installed on the outer surface of the valve body (1), and the second gear (306) is located inside the housing (307).

6. The pneumatic cut-off valve with anti-blocking and erosion resistance according to claim 1, characterized in that: A sealing ring (302) is fixedly installed on the surface of the first gear (301) close to the valve body (1), and there are two sealing rings (302).

7. The pneumatic cut-off valve with anti-blocking and erosion-resistant features according to claim 1, characterized in that: The transmission mechanism (4) is arranged on the outer surface of the valve body (1). The transmission mechanism (4) includes a connecting pipe (403), a fixing rod (401), and a water wheel (405). The connecting pipe (403) is fixedly installed on the outer surface of the valve body (1). A check valve (404) is arranged on the outer surface of the connecting pipe (403). Both ends of the connecting pipe (403) are communicated with the valve body (1). The water wheel (405) is rotatably installed on the outer surface of the connecting pipe (403). The fixing rod (401) is fixedly installed on the outer surface of the water wheel (405), and the free end of the fixing rod (401) is fixedly connected to the second gear (306).

8. The pneumatic cut-off valve with anti-blocking and erosion-resistant features according to claim 7, characterized in that: A limiting block (402) is slidably installed on the outer surface of the fixing rod (401), and the limiting block (402) is fixedly connected to the valve body (1).

9. The pneumatic cut-off valve with anti-blocking and erosion resistance according to claim 1, characterized in that: An expansion rod (509) and a spring (510) are fixedly installed between the sliding plate (507) and the box body (503). A pressure sensor (501) is fixedly installed on the outer surface of the driving device (7). An air inlet pipe (502) is fixedly installed between the pressure sensor (501) and the box body (503).

10. A pneumatic cut-off valve that prevents blockage and is resistant to erosion, characterized in that: An oil inlet pipe (603) is fixedly installed at the top of the oil barrel (605). A piston is arranged at the top of the oil inlet pipe (603). A first pipeline (601) is fixedly installed between the oil barrel (605) and the housing (307). A second pipeline (606) is fixedly installed between the oil barrel (605) and the oil absorbent cotton (607). A support rod (602) is fixedly installed between the valve body (1) and the first pipeline (601).

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