Exhaust butterfly valve with sealing performance detection function

Abstract

The invention discloses an exhaust butterfly valve with a sealing performance detection function, and relates to the technical field of butterfly valve detection.The exhaust butterfly valve comprises a butterfly valve body, a ventilation pipeline, a sealing detection mechanism and an anti-abrasion mechanism, the butterfly valve body is connected with the ventilation pipeline, the ventilation pipeline is connected with the sealing detection mechanism, and the ventilation pipeline is connected with the anti-abrasion mechanism; the butterfly valve body comprises a valve body, a valve seat and a sealing ring, the valve body is arranged on the ground, connecting holes are formed in the upper end and the lower end of the valve body, the valve seat is in a circular ring shape, and the valve seat is connected with the inner wall of the valve body in a fastened mode. The valve seat is arranged on one side of the valve body connecting hole.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valve detection, in particular to an exhaust butterfly valve with a sealing detection function. Background Art

[0002] The butterfly valve is a rotary valve that opens and closes the valve by rotating the disc-shaped closing member about 90°. This valve has the advantages of simple structure, small size, light weight, and easy operation. It is widely used in industrial fields such as petroleum, chemical industry, metallurgy, and electric power.

[0003] The sealing performance of butterfly valves is an important indicator for evaluating the quality of butterfly valves. Butterfly valves need to have good sealing performance during use to prevent medium leakage. If the sealing performance of butterfly valves is poor, it will cause leakage in the pipeline system, which will not only cause waste of resources and environmental pollution, but also pose a potential threat to production and personnel safety. Therefore, tightness testing of butterfly valves is a necessary means to ensure their sealing performance and prevent leakage.

[0004] Conventional sealing detection is mostly achieved by testing pressure. This detection method can only detect whether the butterfly valve is sealed, but cannot accurately locate the leaking parts. Summary of the invention

[0005] The object of the present invention is to provide an exhaust butterfly valve with a sealing detection function to solve the problems raised in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: The exhaust butterfly valve includes a butterfly valve body, a ventilation pipe, a sealing detection mechanism and an anti-wear mechanism. The butterfly valve body is connected to the ventilation pipe, the ventilation pipe is connected to the sealing detection mechanism, and the ventilation pipe is connected to the anti-wear mechanism. The ventilation pipe provides a fluid flow channel, the sealing detection mechanism is used to detect the airtightness of the butterfly valve body, and the anti-wear mechanism reduces the damage to the butterfly valve body.

[0007] In the exhaust butterfly valve, the butterfly valve body serves as the main body, and mainly cuts off or throttles the fluid in the pipeline. The opening and closing of the butterfly valve body is achieved by the rotation of the valve shaft. The ventilation pipeline and the butterfly valve body are tightly connected for the input and output of the fluid. The sealing detection mechanism is used to detect the sealing performance of the butterfly valve body. The anti-wear mechanism achieves anti-wear of the butterfly valve body by changing the fluid angle, reducing wear and extending its service life.

[0008] Furthermore, the butterfly valve body includes a valve body, a valve seat and a sealing ring. The valve body is placed on the ground, and connecting holes are provided at the upper and lower ends of the valve body. The valve seat is in a circular ring shape, and the valve seat is tightly connected to the inner wall of the valve body. The valve seat is placed on one side of the valve body connecting hole. The longitudinal section of the sealing ring is in a circular ring shape, and the outer wall of the sealing ring is tightly connected to the inner wall of the valve seat. The valve body is connected to the ventilation pipe. The butterfly valve body also includes a butterfly plate and a valve stem. The butterfly plate is placed in the valve body, and the valve stem is rotatably connected to the valve body through the connecting hole. The butterfly plate and the sealing ring are engaged. Two mounting holes are provided on one side of the butterfly valve close to the valve body connecting hole. The centers of the two mounting holes and the valve body connecting hole are in a straight line. The valve stem and the butterfly valve are tightly connected, and the valve stem and the mounting hole are tightly connected.

[0009] In the butterfly valve body, the mechanism serves as the main body of the entire device. The butterfly valve body is used to control the opening and closing of the fluid channel and its flow rate, which can be controlled by rotating the butterfly plate. In the butterfly valve body, the valve body is the outer shell of the mechanism, and its internal space is used to circulate fluid. The valve body is provided with a connecting hole for placing the valve stem. The valve stem and the connecting hole are rotatably connected and are tightly connected to the butterfly plate through the mounting hole. When the valve stem is rotated, the butterfly plate can rotate a certain angle. There is also a valve seat and a sealing ring at the junction of the butterfly plate and the valve body. The valve seat and the sealing ring are tightly connected to the inner wall of the valve body. The valve seat bears the pressure and impact force from the fluid when the fluid passes through. The sealing ring can keep the valve body and the butterfly plate airtight when the butterfly plate is not rotating, that is, when the butterfly valve is closed, to prevent fluid leakage.

[0010] Furthermore, the ventilation pipe is divided into a feed pipe and a discharge pipe, the feed pipe is tightly connected to the valve body, the feed pipe is placed on the side of the butterfly plate with the mounting hole, the discharge pipe is tightly connected to the valve body, the discharge pipe is placed on the side of the butterfly plate without the mounting hole, the feed pipe is connected to the sealing detection mechanism, the feed pipe is connected to the anti-wear mechanism, and the discharge pipe is connected to the sealing detection mechanism.

[0011] In the ventilation pipe, the mechanism is divided into a feed pipe and a discharge pipe, which are respectively tightly connected to the two ports of the valve body. The feed pipe allows the fluid to enter the valve body through the feed pipe, and then flow out to the discharge pipe after passing through the butterfly plate.

[0012] Furthermore, the sealing detection mechanism includes an air guiding device, which is tightly connected to the feed pipeline, and is tightly connected to the discharge pipeline. The air guiding device includes a first flow regulating valve, a second flow regulating valve and an air supply pipe, the first flow regulating valve is tightly connected to the feed pipeline, the second flow regulating valve is tightly connected to the discharge pipeline, one end of the air supply pipe is connected to the feed pipeline, and the end of the air supply pipe away from the feed pipeline is connected to a high-temperature gas input source.

[0013] In the sealing detection mechanism, the mechanism includes a gas guide device, in which a first flow regulating valve and a second flow regulating valve are respectively fastened to a feed pipe and a discharge pipe. The gas pipe is used to input the high-temperature gas in the high-temperature gas input source into the feed pipe through the gas pipe, and then into the butterfly valve body. The butterfly valve body is tested twice in total. The first time is when the butterfly plate is opened, the first flow regulating valve is opened, the second flow regulating valve is closed, and the high-temperature gas is injected. The high-temperature gas enters the valve body from the feed pipe and then flows out from the valve body to the discharge pipe. In this process, the temperature of the valve body surface is measured. If the temperature rise is detected, it proves that the valve body is not airtight. If the temperature rise is not detected, it proves that the valve body is airtight. The second time is when the butterfly plate is closed, the first flow regulating valve is opened, and the gas pipe inputs high-temperature gas. Since the butterfly plate is closed, the high-temperature gas cannot continue to move forward to the butterfly plate. At this time, the temperature of the valve body corresponding to the butterfly plate is detected. If the temperature rise is detected, it proves that the butterfly plate is not airtight. If the temperature rise is not detected, the gas pipe stops inputting high-temperature gas.

[0014] Furthermore, the sealing detection mechanism also includes a moving device, which is connected to the discharge pipe. The moving device includes a driving motor, an annular track, a fixed plate and a storage box. The annular track is a circular ring, and the annular track is sleeved on the outer periphery of the discharge pipe. There are two fixed plates, one end of the two fixed plates is fastened to the discharge pipe, one end of the fixed plate away from the discharge pipe is fastened to the annular track, and the other end of the fixed plate is slidably connected to the annular track. A gear is provided inside the annular track, and the fixed end of the driving motor is meshed with the annular track through a thread, and the fixed end of the driving motor is meshed with the discharge pipe. The surface of the track is tightly connected, the storage box and the annular track are tightly connected, the sealing detection mechanism also includes a temperature measuring device, the temperature measuring device is connected to the moving device, the storage box and the temperature measuring device are connected, the temperature measuring device includes a servo motor, a rotating rod, an infrared sensor and a rotating box, the infrared sensor is placed in the rotating box, a rotating hole is opened on the side wall of the storage box, the rotating box is placed in the storage box, one end of the rotating rod is tightly connected to the output end of the servo motor, the other end of the rotating rod passes through the rotating hole and is tightly connected to the rotating box, the rotating box is rotatably connected to the side wall of the storage box, and the fixed end of the servo motor is tightly connected to the storage box.

[0015] The sealing detection mechanism also includes a moving device and a temperature measuring device. The moving device is used to move the temperature measuring device so that it can perform mobile temperature measurement and the temperature measuring device can measure the temperature of the valve body in a circle. The annular track in the moving device is fixed by a fixing plate so that it can rotate. The inner ring of the annular track is also connected to the output end of the driving motor by a thread. The fixed end of the driving motor is tightly connected to the surface of the valve body. After the driving motor is started, the annular track can rotate. The fixing plate is used to support the rotation of the annular track. A storage box is also tightly connected to the annular track. The temperature measuring device is placed in the storage box. In the box, the temperature measuring device can be rotated together when the circular track rotates, so as to realize the circular temperature measurement of the valve body. A rotating hole is provided on the side wall of the storage box, and the rotating rod is rotatably connected to the rotating hole. The two ends are respectively fastened with a rotating box and a servo motor. The infrared sensor is placed in the rotating box and is fastened to the rotating box. After the servo motor is started, the rotating rod is driven to rotate, and the rotating box is rotated upward or downward, so that the infrared sensor can rotate upward or downward. At this time, the detection port of the infrared sensor will fall on different positions of the valve body. Through such operation, the measurement of different positions of the valve body can be realized.

[0016] Furthermore, the anti-wear mechanism includes a secondary pipe, a filter screen and a third flow regulating valve. The inlet and outlet of the secondary pipe are connected to the feed pipe. The first flow regulating valve is placed on the feed pipe between the inlet and outlet of the secondary pipe. The third flow regulating valve is tightly connected to the secondary pipe. The filter screen is tightly connected to the inner wall of the secondary pipe. The filter screen is placed between the third flow regulating valve and the outlet of the secondary pipe. The bottom of the secondary pipe at the filter screen can be opened. The anti-wear mechanism also includes a flow guide device. The flow guide device is tightly connected to the feed pipe. The flow guide device is placed between the butterfly plate and the outlet of the secondary pipe. The flow guide device includes a rotating motor, a rotating shaft, rotating blades and a support rod. Two support rods are provided. One end of the two support rods is tightly connected to the inner wall of the feed pipe, and the other end of the support rod is tightly connected to the rotating motor. The output end of the rotating motor is tightly connected to the rotating shaft. A number of rotating blades are provided. The plurality of rotating blades are tightly connected to the rotating shaft, and the rotating blades and the axis of the rotating shaft form a certain angle.

[0017] In the anti-wear mechanism, this mechanism is used to reduce the wear of the butterfly plate and increase its service life. For gas or fluid without impurities, some impurities may be mixed in the process of flow and directly pass into the valve body. The fluid itself will impact the butterfly plate. The internal impurities may aggravate the impact, making the butterfly plate more impacted. In the long run, the service life of the butterfly plate may be reduced. Therefore, in this case, it is filtered through a filter screen. Before that, the first flow control valve is closed and the third flow control valve is opened, so that the fluid cannot enter the butterfly valve body through the feed pipe, but enters through the auxiliary pipe. The auxiliary pipe is provided with a filter screen. When the fluid passes through, the impurities are filtered out, and the rest flows to the second half of the feed pipe through the auxiliary pipe. The flow regulating valve is opened for the fluid that contains small particles, and the third flow regulating valve is closed. The fluid directly passes through the feed pipe to the flow regulating device, and then to the valve body, and finally flows out to the discharge pipe. All the fluid directly reaches the butterfly plate. Due to the direct impact, the butterfly plate will be greatly worn, and long-term use will affect its service life. Therefore, a flow regulating device is set in the front. The rotating shaft is driven by a rotating motor to rotate, thereby driving the rotating blades to rotate together. The rotating blades and the axis of the rotating shaft are at a certain angle. Therefore, the fluid that directly rushes to the butterfly plate can reach the butterfly plate at a certain moving angle under the action of the rotating blades, thereby reducing the impact of the fluid on the butterfly plate to a certain extent.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: after the present invention is started, the sealing of the butterfly valve body is firstly detected, the driving motor is started, and the butterfly valve body rotates with the circular track. There is a storage box on the circular track, and the temperature measuring device is placed in it, so that the temperature of the valve body can be measured in a circle. The servo motor drives the rotating rod to rotate, so that the infrared sensor can rotate upward or downward, and its detection port will fall on different positions of the valve body, so that the measurement of different positions of the valve body can be achieved. The butterfly valve body is tested twice in total. The first time is when the butterfly plate is open, the first flow regulating valve is opened, and the second flow regulating valve is closed, and high-temperature gas is injected. During the process of the high-temperature gas feeding pipe and the discharging pipe, the temperature measuring device measures the temperature of the valve body surface. If the temperature rise is detected, it proves that the valve body is not airtight. If the temperature rise is not detected, it proves that the valve body is airtight. The second time is when the butterfly plate is closed. Under the condition that the valve body is not sealed, the valve body is not sealed, and the temperature rise is detected. If the temperature rise is detected, it proves that the butterfly plate is not airtight. If the temperature rise is not detected, the high-temperature gas is stopped from entering the gas pipeline, and the fluid is introduced after sealing to start working. For gas or fluid without impurities, the fluid enters through the auxiliary pipe, and the impurities are filtered out when passing through the filter screen. The rest flows through the auxiliary pipe to the second half of the feed pipeline, and then passes through the guide device and the valve body. For fluid that contains small particles, the fluid directly passes through the feed pipeline to the guide device, then to the valve body, and finally flows out to the discharge pipeline. The guide device sets rotating blades at a certain angle so that the fluid reaches the butterfly plate at a certain moving angle, which reduces the impact of the fluid on the butterfly plate to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A top view of the present invention; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 3 Enlarged view of part B; Figure 5 for Figure 3 Enlarged view of local C; Figure 6 This is a diagram showing the interior of the butterfly valve body; Figure 7 It is a schematic diagram of the sealing detection mechanism; Figure 8 It is a top view of the sealing detection mechanism; Fig. 9 Schematic diagram of the diversion device.

[0020] In the figure: 1. butterfly valve body; 11. valve body; 12. valve seat; 13. sealing ring; 14. butterfly plate; 141. mounting hole; 15. valve stem; 2. ventilation pipe; 21. feed pipe; 22. discharge pipe; 3. sealing detection mechanism; 31. air guide device; 311. first flow regulating valve; 312. second flow regulating valve; 313. air pipe; 32. moving device; 321. driving motor; 322. circular track; 323. fixing plate; 324. storage box; 33. temperature measuring device; 331. servo motor; 332. rotating rod; 333. infrared sensor; 334. rotating box; 4. anti-wear mechanism; 41. auxiliary pipe; 42. filter screen; 43. third flow regulating valve; 44. flow guide device; 441. rotating motor; 442. rotating shaft; 443. rotating blade. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example: Figure 1-Figure 9 As shown, the present invention provides a technical solution for an exhaust butterfly valve with a sealing detection function, the exhaust butterfly valve comprising a butterfly valve body 1, a ventilation pipe 2, a sealing detection mechanism 3 and an anti-wear mechanism 4, the butterfly valve body 1 is connected to the ventilation pipe 2, the ventilation pipe 2 is connected to the sealing detection mechanism 3, the ventilation pipe 2 is connected to the anti-wear mechanism 4, the ventilation pipe 2 provides a fluid flow channel, the sealing detection mechanism 3 is used to detect the airtightness of the butterfly valve body 1, and the anti-wear mechanism 4 reduces the damage to the butterfly valve body 1.

[0023] In the exhaust butterfly valve, the butterfly valve body 1 serves as the main body, and mainly cuts off or throttles the fluid in the pipeline. The opening and closing of the butterfly valve body 1 is achieved by the rotation of the valve shaft. The ventilation pipe 2 and the butterfly valve body 1 are tightly connected and are used for the input and output of the fluid. The sealing detection mechanism 3 is used to detect the sealing performance of the butterfly valve body 1. The anti-wear mechanism 4 achieves anti-wear of the butterfly valve body 1 by changing the fluid angle, thereby reducing wear and extending its service life.

[0024] The butterfly valve body 1 includes a valve body 11, a valve seat 12 and a sealing ring 13. The valve body 11 is placed on the ground. Connecting holes are provided at the upper and lower ends of the valve body 11. The valve seat 12 is annular. The valve seat 12 is tightly connected to the inner wall of the valve body 11. The valve seat 12 is placed on one side of the connecting hole of the valve body 11. The longitudinal section of the sealing ring 13 is annular. The outer wall of the sealing ring 13 is tightly connected to the inner wall of the valve seat 12. The valve body 11 is connected to the ventilation pipe 2. The butterfly valve body 1 also includes a butterfly plate 14 and a valve stem 15. The butterfly plate 14 is placed in the valve body 11. The valve stem 15 is rotatably connected to the valve body 11 through the connecting hole. The butterfly plate 14 and the sealing ring 13 are engaged. Two mounting holes 141 are provided on one side of the butterfly plate 14 close to the connecting hole of the valve body 11. The two mounting holes 141 and the center of the connecting hole of the valve body 11 are on a straight line. The valve stem 15 is tightly connected to the butterfly plate 14, and the valve stem 15 is tightly connected to the mounting hole 141.

[0025] In the butterfly valve body 1, the mechanism serves as the main body of the entire device. The butterfly valve body 1 is used to control the opening and closing of the fluid channel and control its flow rate, which can be controlled by rotating the butterfly plate 14. In the butterfly valve body 1, the valve body 11 is the outer shell of the mechanism, and its internal space is used for circulating fluid. The valve body 11 is provided with a connecting hole for placing a valve stem 15. The valve stem 15 is rotatably connected to the connecting hole and is tightly connected to the butterfly plate 14 through the mounting hole 141. When the valve stem 15 is rotated, the butterfly plate 14 can rotate a certain angle. There are also valve seats 12 and sealing rings 13 at the junction of the butterfly plate 14 and the valve body 11. The valve seats 12 and the sealing rings 13 are tightly connected to the inner wall of the valve body 11. The valve seat 12 is subjected to the pressure and impact force from the fluid when the fluid passes through. The sealing ring 13 can keep the valve body 11 and the butterfly plate 14 airtight when the butterfly plate 14 is not rotating, that is, when the butterfly valve is closed, to prevent fluid leakage.

[0026] The ventilation pipe 2 is divided into a feed pipe 21 and a discharge pipe 22. The feed pipe 21 is firmly connected to the valve body 11. The feed pipe 21 is placed on the side of the butterfly plate 14 with the mounting hole 141. The discharge pipe 22 is firmly connected to the valve body 11. The discharge pipe 22 is placed on the side of the butterfly plate 14 without the mounting hole 141. The feed pipe 21 is connected to the sealing detection mechanism 3. The feed pipe 21 is connected to the anti-wear mechanism 4. The discharge pipe 22 is connected to the sealing detection mechanism 3.

[0027] In the ventilation pipe 2, the mechanism is divided into a feed pipe 21 and a discharge pipe 22, which are respectively tightly connected to the two ports of the valve body 11. The feed pipe 21 allows the fluid to enter the valve body 11 through the feed pipe 21, and then flow out to the discharge pipe 22 after passing through the butterfly plate 14.

[0028] The sealing detection mechanism 3 includes an air guide device 31, which is tightly connected to the feed pipeline 21, and is tightly connected to the discharge pipeline 22. The air guide device 31 includes a first flow regulating valve 311, a second flow regulating valve 312 and an air pipe 313. The first flow regulating valve 311 is tightly connected to the feed pipeline 21, and the second flow regulating valve 312 is tightly connected to the discharge pipeline 22. One end of the air pipe 313 is connected to the feed pipeline 21, and the end of the air pipe 313 away from the feed pipeline 21 is connected to a high-temperature gas input source.

[0029] In the sealing detection mechanism 3, the mechanism includes an air guide device 31, and the air guide device 31 is composed of a first flow regulating valve 311 and a second flow regulating valve 312, which are respectively fastened to the feed pipe 21 and the discharge pipe 22. The gas delivery pipe 313 is used to input the high-temperature gas in the high-temperature gas input source into the feed pipe 21 through the gas delivery pipe 313, and then into the butterfly valve body 1. The butterfly valve body 1 is tested twice in total. The first time is when the butterfly plate 14 is opened, the first flow regulating valve 311 is opened, the second flow regulating valve 312 is closed, and the high-temperature gas is injected. The high-temperature gas enters the valve body 11 from the feed pipe 21, and then enters the valve body 11. 1 flows out to the discharge pipe 22. In this process, the temperature of the surface of the valve body 11 is measured. If the temperature rise is detected, it proves that the valve body 11 is not airtight. If the temperature rise is not detected, it proves that the valve body 11 is airtight. The second time is when the butterfly plate 14 is closed, the first flow regulating valve 311 is opened, and the gas pipeline 313 inputs high-temperature gas. Since the butterfly plate 14 is closed, the high-temperature gas cannot continue to move forward to the butterfly plate 14. At this time, the temperature of the valve body 11 corresponding to the butterfly plate 14 is detected. If the temperature rise is detected, it proves that the butterfly plate 14 is not airtight. If the temperature rise is not detected, the gas pipeline 313 stops inputting high-temperature gas.

[0030] The sealing detection mechanism 3 also includes a moving device 32, which is connected to the discharge pipe 22. The moving device 32 includes a driving motor 321, an annular track 322, a fixed plate 323 and a storage box 324. The annular track 322 is a circular ring, and the annular track 322 is sleeved on the outer periphery of the discharge pipe 22. There are two fixed plates 323, one end of the two fixed plates 323 is fastened to the discharge pipe 22, one end of the fixed plate 323 away from the discharge pipe 22 is fastened to the annular track 322, and the other end of the fixed plate 323 is slidably connected to the annular track 322. A gear is provided inside the annular track 322. The fixed end of the driving motor 321 and the annular track 322 are engaged by threads, and the fixed end of the driving motor 321 is fastened to the surface of the discharge pipe 22. The storage box 324 and the annular track 322 are tightly connected. The sealing detection mechanism 3 also includes a temperature measuring device 33. The temperature measuring device 33 is connected to the moving device 32. The storage box 324 and the temperature measuring device 33 are connected. The temperature measuring device 33 includes a servo motor 331, a rotating rod 332, an infrared sensor 333 and a rotating box 334. The infrared sensor 333 is placed in the rotating box 334. A rotating hole is provided on the side wall of the storage box 324. The rotating box 334 is placed in the storage box 324. One end of the rotating rod 332 is tightly connected to the output end of the servo motor 331. The other end of the rotating rod 332 passes through the rotating hole and is tightly connected to the rotating box 334. The rotating box 334 is rotatably connected to the side wall of the storage box 324. The fixed end of the servo motor 331 is tightly connected to the storage box 324.

[0031] The sealing detection mechanism 3 also includes a moving device 32 and a temperature measuring device 33. The moving device 32 is used to move the temperature measuring device 33 so that it can perform mobile temperature measurement, so that the temperature measuring device 33 can circle the temperature of the valve body 11. The annular track 322 in the moving device 32 is fixed by a fixing plate 323 so that it can rotate. The inner ring of the annular track 322 is also connected to the output end of the driving motor 321 through a threaded connection. The fixed end of the driving motor 321 is tightly connected to the surface of the valve body 11. After the driving motor 321 is started, the annular track 322 can be rotated. The fixing plate 323 is used to support the rotation of the annular track 322. The annular track 322 is also tightly connected to a storage box 324, and the temperature measuring device 33 is placed in the storage box. In the storage box 324, when the annular track 322 rotates, the temperature measuring device 33 can be rotated together to realize the circling temperature measurement of the valve body 11. The side wall of the storage box 324 is provided with a rotating hole, and the rotating rod 332 is rotatably connected to the rotating hole. The two ends are respectively fastened with a rotating box 334 and a servo motor 331. The infrared sensor 333 is placed in the rotating box 334 and is fastened to the rotating box 334. After the servo motor 331 is started, the rotating rod 332 is driven to rotate, and the rotating box 334 is rotated upward or downward, so that the infrared sensor 333 can rotate upward or downward. At this time, the detection port of the infrared sensor 333 will fall on different positions of the valve body 11. Through such operation, the measurement of different positions of the valve body 11 can be achieved.

[0032] The anti-wear mechanism 4 includes a secondary pipe 41, a filter screen 42 and a third flow regulating valve 43. The inlet and outlet of the secondary pipe 41 are both connected to the feed pipe 21. The first flow regulating valve 311 is placed on the feed pipe 21 between the inlet and outlet of the secondary pipe 41. The third flow regulating valve 43 is tightly connected to the secondary pipe 41. The filter screen 42 is tightly connected to the inner wall of the secondary pipe 41. The filter screen 42 is placed between the third flow regulating valve 43 and the outlet of the secondary pipe 41. The bottom of the secondary pipe 41 at the filter screen 42 can be opened. The anti-wear mechanism 4 also includes a guide device 44. The guide device 44 and the feed pipe 21 is fastened connected, the guide device 44 is placed between the butterfly plate 14 and the outlet of the auxiliary pipe 41, the guide device 44 comprises a rotating motor 441, a rotating shaft 442, a rotating blade 443 and a support rod, two support rods are provided, one end of the two support rods is fastened to the inner wall of the feed pipe 21, the other end of the support rod is fastened to the rotating motor 441, the output end of the rotating motor 441 is fastened to the rotating shaft 442, a plurality of rotating blades 443 are provided, a plurality of rotating blades 443 are fastened to the rotating shaft 442, and the axis of the rotating blade 443 and the rotating shaft 442 form a certain angle.

[0033] In the anti-wear mechanism 4, the mechanism is used to reduce the wear of the butterfly plate 14 and increase its service life. For gas or fluid without impurities, some impurities may be mixed in the process of flow and directly pass into the valve body 11. The fluid itself will impact the butterfly plate 14. The internal impurities may aggravate the impact, making the butterfly plate 14 more impacted. In the long run, the service life of the butterfly plate 14 may be reduced. Therefore, in this case, it is filtered through the filter screen 42. Before this, the first flow regulating valve 311 is closed and the third flow regulating valve 43 is opened, so that the fluid cannot enter the butterfly valve body 1 through the feed pipe 21, but enters through the auxiliary pipe 41. The auxiliary pipe 41 is provided with a filter screen 42. When the fluid passes through, impurities are filtered out, and the rest flows to the second half of the feed pipe 21 through the auxiliary pipe 41 and passes through the diversion device. 44 then passes through the valve body 11; for the fluid that itself contains small particles, the first flow regulating valve 311 is opened, and the third flow regulating valve 43 is closed. The fluid directly passes through the feed pipe 21 to the guide device 44, and then to the valve body 11, and finally flows out to the discharge pipe 22. All the fluid directly reaches the butterfly plate 14. Due to the direct impact, the butterfly plate 14 will cause greater wear and tear, and long-term use will affect the service life. Therefore, a guide device 44 is set in the front, and the rotating shaft 442 is driven to rotate by the rotating motor 441, thereby driving the rotating blades 443 to rotate together, and the rotating blades 443 and the axis of the rotating shaft 442 are at a certain angle. Therefore, the fluid directly rushing to the butterfly plate 14 can reach the butterfly plate 14 at a certain moving angle under the action of the rotating blades 443, thereby reducing the impact of the fluid on the butterfly plate 14 to a certain extent.

[0034] Working principle of the present invention: after starting, the present invention first performs a sealing test on the butterfly valve body 1, and the driving motor 321 is started, and the annular track 322 is rotated. There is a storage box 324 on the annular track 322, and the temperature measuring device 33 is placed therein, so that the temperature of the valve body 11 can be measured in a circle. The servo motor 331 drives the rotating rod 332 to rotate, so that the infrared sensor 333 can rotate upward or downward, and its detection port will fall on different positions of the valve body 11, so that the measurement of different positions of the valve body 11 can be achieved. The butterfly valve body 1 is tested twice in total. The first time is when the butterfly plate 14 is open, the first flow regulating valve 311 is opened, and the second flow regulating valve 312 is closed, and high-temperature gas is injected. In this process, the temperature measuring device 33 measures the temperature of the surface of the valve body 11. If the temperature rise is detected, it proves that the valve body 11 is not airtight. If the temperature rise is not detected, it proves that the valve body 11 is airtight; the second time is when the butterfly plate 14 is closed, The first flow regulating valve 311 is opened, and the high-temperature gas is input into the gas pipe 313. Since the butterfly plate 14 is closed, the high-temperature gas cannot continue to move forward to the butterfly plate 14. At this time, the temperature of the valve body 11 corresponding to the butterfly plate 14 is detected. If the temperature rise is detected, it proves that the butterfly plate 14 is not airtight. If the temperature rise is not detected, the gas pipe 313 stops inputting the high-temperature gas, and the fluid is introduced after sealing to start working. For gas or fluid without impurities, the fluid enters through the auxiliary pipe 41. When passing through the filter screen 42, the impurities are filtered out, and the rest flows through the auxiliary pipe 41 to the second half of the feed pipe 21, and then passes through the guide device 44 and then through the valve body 11; for the fluid containing small particles itself, the fluid directly passes through the feed pipe 21 to the guide device 44, then to the valve body 11, and finally flows out to the discharge pipe 22. The guide device 44 sets a certain angle of rotating blades 443, so that the fluid reaches the butterfly plate 14 at a certain moving angle, which reduces the impact of the fluid on the butterfly plate 14 to a certain extent.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An exhaust butterfly valve with a sealing detection function, characterized in that: The exhaust butterfly valve comprises a butterfly valve body (1), a ventilation pipe (2), a sealing detection mechanism (3) and an anti-wear mechanism (4); the butterfly valve body (1) is connected to the ventilation pipe (2), the ventilation pipe (2) is connected to the sealing detection mechanism (3), the ventilation pipe (2) is connected to the anti-wear mechanism (4), the ventilation pipe (2) provides a fluid flow channel, the sealing detection mechanism (3) is used to detect whether the butterfly valve body (1) is sealed, and the anti-wear mechanism (4) reduces damage to the butterfly valve body (1).

2. The exhaust butterfly valve with sealing detection function according to claim 1, characterized in that: The butterfly valve body (1) comprises a valve body (11), a valve seat (12) and a sealing ring (13); the valve body (11) is placed on the ground; connection holes are provided at the upper and lower ends of the valve body (11); the valve seat (12) is in the shape of a circular ring; the valve seat (12) is tightly connected to the inner wall of the valve body (11); the valve seat (12) is placed on one side of the connecting hole of the valve body (11); the sealing ring (13) has a circular ring shape in longitudinal section; the outer wall of the sealing ring (13) is tightly connected to the inner wall of the valve seat (12); and the valve body (11) is connected to the ventilation pipe (2).

3. The exhaust butterfly valve with sealing detection function according to claim 2, characterized in that: The butterfly valve body (1) further comprises a butterfly plate (14) and a valve stem (15), wherein the butterfly plate (14) is disposed in the valve body (11), and the valve stem (15) is rotatably connected to the valve body (11) via a connecting hole, the butterfly plate (14) and the sealing ring (13) are engaged, and two mounting holes (141) are provided on a side of the butterfly plate (14) close to the connecting hole of the valve body (11), and the centers of the two mounting holes (141) and the connecting hole of the valve body (11) are in a straight line, the valve stem (15) and the butterfly plate (14) are tightly connected, and the valve stem (15) and the mounting hole (141) are tightly connected.

4. The exhaust butterfly valve with sealing detection function according to claim 2, characterized in that: The ventilation pipe (2) is divided into a feed pipe (21) and a discharge pipe (22); the feed pipe (21) is tightly connected to the valve body (11); the feed pipe (21) is placed on a side of the butterfly plate (14) having a mounting hole (141); the discharge pipe (22) is tightly connected to the valve body (11); the discharge pipe (22) is placed on a side of the butterfly plate (14) not having a mounting hole (141); the feed pipe (21) is connected to a sealing detection mechanism (3); the feed pipe (21) is connected to an anti-wear mechanism (4); and the discharge pipe (22) is connected to the sealing detection mechanism (3).

5. The exhaust butterfly valve with sealing detection function according to claim 4, characterized in that: The sealing detection mechanism (3) comprises an air guide device (31), the air guide device (31) being tightly connected to the feed pipeline (21), and the air guide device (31) being tightly connected to the discharge pipeline (22), the air guide device (31) comprising a first flow regulating valve (311), a second flow regulating valve (312) and an air delivery pipe (313), the first flow regulating valve (311) being tightly connected to the feed pipeline (21), the second flow regulating valve (312) being tightly connected to the discharge pipeline (22), one end of the air delivery pipe (313) being in communication with the feed pipeline (21), and one end of the air delivery pipe (313) being away from the feed pipeline (21) being in communication with a high-temperature gas input source.

6. The exhaust butterfly valve with sealing detection function according to claim 5, characterized in that: The sealing detection mechanism (3) further comprises a moving device (32), the moving device (32) being connected to the discharge pipe (22), the moving device (32) comprising a driving motor (321), an annular track (322), a fixing plate (323) and a storage box (324), the annular track (322) being in the shape of a ring, the annular track (322) being sleeved on the outer periphery of the discharge pipe (22), two fixing plates (323) being provided, one end of the two fixing plates (323) and the discharge pipe (22) The fixing plate (323) is connected to the annular track (322) in a fastened manner, one end of the fixing plate (323) away from the discharge pipe (22) is fastened to the annular track (322), the other end of the fixing plate (323) is connected to the annular track (322) in a sliding manner, a gear is provided inside the annular track (322), the fixing end of the driving motor (321) and the annular track (322) are engaged with each other through a thread, the fixing end of the driving motor (321) and the surface of the discharge pipe (22) are fastened to each other, and the storage box (324) and the annular track (322) are fastened to each other.

7. The exhaust butterfly valve with sealing detection function according to claim 6, characterized in that: The sealing detection mechanism (3) further comprises a temperature measuring device (33), the temperature measuring device (33) being connected to the moving device (32), the storage box (324) being connected to the temperature measuring device (33), the temperature measuring device (33) comprising a servo motor (331), a rotating rod (332), an infrared sensor (333) and a rotating box (334), the infrared sensor (333) being disposed in the rotating box (334), a rotating hole being provided on a side wall of the storage box (324), the rotating box (334) being disposed in the storage box (324), one end of the rotating rod (332) being fastened to an output end of the servo motor (331), the other end of the rotating rod (332) passing through the rotating hole and being fastened to the rotating box (334), the rotating box (334) being rotatably connected to a side wall of the storage box (324), and the fixed end of the servo motor (331) being fastened to the storage box (324).

8. The exhaust butterfly valve with sealing detection function according to claim 5, characterized in that: The anti-wear mechanism (4) comprises a secondary pipe (41), a filter screen (42) and a third flow regulating valve (43); the inlet and outlet of the secondary pipe (41) are both in communication with the feed pipe (21); the first flow regulating valve (311) is disposed on the feed pipe (21) between the inlet and outlet of the secondary pipe (41); the third flow regulating valve (43) is tightly connected to the secondary pipe (41); the filter screen (42) is tightly connected to the inner wall of the secondary pipe (41); the filter screen (42) is disposed between the third flow regulating valve (43) and the outlet of the secondary pipe (41); and the bottom of the secondary pipe (41) at the filter screen (42) is openable.

9. The exhaust butterfly valve with sealing detection function according to claim 8, characterized in that: The anti-wear mechanism (4) further comprises a flow guide device (44), the flow guide device (44) being fastened to the feed pipe (21), the flow guide device (44) being disposed between the butterfly plate (14) and the outlet of the auxiliary pipe (41), the flow guide device (44) comprising a rotating motor (441), a rotating shaft (442), rotating blades (443) and a support rod, two of the support rods being provided, one end of the two support rods being fastened to the inner wall of the feed pipe (21), the other end of the support rod being fastened to the rotating motor (441), the output end of the rotating motor (441) being fastened to the rotating shaft (442), a plurality of the rotating blades (443) being fastened to the rotating shaft (442), the axes of the rotating blades (443) and the rotating shaft (442) being at a certain angle.

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