Three-eccentric U-shaped metal butterfly valve suitable for granular media

Abstract

The invention discloses a tri-eccentric U-shaped metal butterfly valve suitable for particle media, and relates to the technical field of butterfly valves, the tri-eccentric U-shaped metal butterfly valve comprises a valve body, a driving assembly, an adjusting assembly, a valve assembly and a driving rod, the driving assembly is fixedly connected with the valve body, and the driving assembly comprises a fixing plate and a support. In the process that the butterfly valve is put into use, the motor is started, along with continuous operation of the motor, the first friction ring continuously rotates, so that the second friction ring continuously bears force, that is, the threaded pipe can always keep a tightening state on the bolts on the two sides under the action of friction force, and through the continuous tightening state of the bolts, the safety of the butterfly valve is improved. The two sets of first sealing flanges and second sealing flanges can be always kept in a stable pressing and tightening state, so that the sealing state of the connecting position of the butterfly valve is stable, leakage caused by loosening of the connecting position of the butterfly valve in the using state of high-speed particle medium fluid for a long time is avoided, and the using stability of the butterfly valve is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valves, and particularly to a triple-eccentric U-shaped metal butterfly valve suitable for particulate media. Background Technique

[0002] A butterfly valve is a common valve. Its butterfly plate rotates around a fixed axis inside the valve body to achieve opening and closing, thereby controlling the fluid flow rate. It has the characteristics of simple structure, small volume, light weight, convenient operation, and rapid opening and closing, and is widely used in fields such as water supply and drainage, heating ventilation, and chemical industry.

[0003] In the prior art, when a metal butterfly valve is used to convey a fluid with particulate media inside it, the butterfly valve will be subjected to a large flow impact for a long time. Prolonged use causes these forces to be transmitted to the flange connection part, which will make the connection position of the butterfly valve loose, affecting the stability of the butterfly valve during use.

[0004] Therefore, a triple-eccentric U-shaped metal butterfly valve suitable for particulate media is proposed to solve the problems raised in the above background technique. Summary of the Invention

[0005] The purpose of the present invention is to provide a triple-eccentric U-shaped metal butterfly valve suitable for particulate media to solve the problems in the above background technique that the butterfly valve will be subjected to a large flow impact for a long time. Prolonged use causes these forces to be transmitted to the flange connection part, which will make the connection position of the butterfly valve loose, affecting the stability of the butterfly valve during use.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A triple-eccentric U-shaped metal butterfly valve suitable for particulate media, including a valve body, a drive assembly, an adjustment assembly, a valve assembly, and a driving rod. The drive assembly is fixedly connected to the valve body, and the drive assembly includes a fixing plate and a bracket; the adjustment assembly is fixedly connected to the valve body, and the adjustment assembly includes a side frame and a slide rail; the valve assembly is fixedly connected to the valve body, and the valve assembly includes a valve seat. First sealing flanges are fixedly installed on the outer surfaces of both sides of the valve seat. Second sealing flanges are provided on the outer surfaces of the two first sealing flanges. An eccentric valve plate is rotatably connected to the inner surface of the valve seat. A fixing sleeve is fixedly connected to the outer surface of the valve seat. A plurality of circular holes are evenly formed on the outer surface of the fixing sleeve. Threaded pipes are rotatably connected to the inner surfaces of the plurality of circular holes. A second friction ring is fixedly connected to the outer surface of the threaded pipe. A plain bearing is fixedly installed on the outer surface of one of the first sealing flanges. A toothed ring is fixedly installed on the outer surface of the plain bearing. A first friction ring is fixedly connected to the inner surface of the toothed ring.

[0007] Preferably, the fixing plate is fixedly connected to the outer surface of the valve body, the bracket is fixedly connected to the inner top of the valve body, a motor is fixedly connected to the outer surface of the fixing plate, and the output end of the motor penetrates through the fixing plate and extends to the other side.

[0008] Preferably, a rotating shaft is fixedly connected to the output end of the motor, a first bevel gear is fixedly connected to the end face of the rotating shaft, a driving shaft is rotatably connected through the outer surface of the bracket, the end face of the driving shaft is rotatably connected to the outer surface of the valve body, a second bevel gear is fixedly connected to the outer surface of the driving shaft, and the second bevel gear is meshed with the first bevel gear.

[0009] Preferably, two first belt pulleys are fixedly connected to the outer surface of the driving shaft, belts are sleeved on the outer surfaces of the two first belt pulleys, a first spur gear is fixedly connected to the outer surface of the driving shaft, and the bracket is located between the first spur gear and the second bevel gear.

[0010] Preferably, the side frame is fixedly connected to the outer surface of the valve body, the slide rail is fixedly connected to the inner top of the valve body, a bearing seat is fixedly connected to the outer surface of the side frame, a rotating tube is fixedly installed on the inner surface of the bearing seat, a slider is slidably connected to the outer surface of the slide rail, a movable seat is fixedly connected to the bottom of the slider, a second belt pulley is fixedly connected to the outer surface of the rotating tube, and the second belt pulley is arranged in a matching manner with the belt.

[0011] Preferably, a spring is fixedly connected between the movable seat and the slide rail, an adjusting rod is rotatably connected to the outer surface of the movable seat close to one side of the slider, a rotating rod is rotatably connected to the inner top of the movable seat, and a second spur gear is fixedly connected to the outer surface of the rotating rod.

[0012] Preferably, a third bevel gear is fixedly connected to the outer surface of the rotating rod at a position close to the lower side of the second spur gear, a fourth bevel gear is fixedly connected to the end face of the adjusting rod, the fourth bevel gear is meshed with the third bevel gear, the adjusting rod is sleeved inside the rotating tube, a plurality of card slots are uniformly formed on the inner surface of the rotating tube, a plurality of card strips are uniformly fixedly connected to the outer surface of the adjusting rod, and the outer surface of the card strip is inserted and connected with the inner surface of the card slot.

[0013] Preferably, the driving rod is fixedly connected to the eccentric valve plate, a third spur gear is fixedly connected to the outer surface of the driving rod, the third spur gear is located inside the valve body, and the third spur gear is matched with the second spur gear in position.

[0014] Preferably, a sealing ring is arranged inside the valve seat, the cross section of the sealing ring is U-shaped, the sealing ring is matched with the eccentric valve plate in position, a hand wheel is rotatably connected to the outer surface of the valve body, and the hand wheel is arranged in a matching manner with the driving rod.

[0015] Preferably, a plurality of bolts are uniformly inserted between the first sealing flange and the second sealing flange, the outer surface of the bolt is threadedly connected with the inner surface of the threaded tube, and the toothed ring is meshed with the first spur gear.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, when the butterfly valve is put into use, the motor is started. As the motor continues to run, the first friction ring continuously rotates, causing the second friction ring to be continuously stressed. That is, under the action of friction, the threaded pipe can always keep the bolts on both sides tightened. Through the continuous tightening state of the bolts, the two groups of first sealing flanges and second sealing flanges can always maintain a stable pressing and tightening state, so that the sealing state at the connection of the butterfly valve is relatively stable, avoiding leakage due to loosening at the connection during the long-term use of the butterfly valve under high-speed particulate medium fluid, effectively improving the stability of the use of the butterfly valve.

[0017] 2. In the present invention, when it is necessary to open the passage at the valve seat position to allow the particulate medium fluid to flow, push the movable seat on either side towards the valve body. The movable seat drives the second spur gear to advance towards the third spur gear. The second spur gear can be advanced to the outer position of the third spur gear. At this time, the rotating second spur gear can drive the third spur gear to rotate accordingly. At this time, the rotation of the third spur gear drives the driving rod to rotate uniformly. By using the uniform rotation of the driving rod to drive the eccentric valve plate to rotate and open, and the eccentric valve plate rotates and opens uniformly, making the use of the butterfly valve relatively stable.

[0018] 3. In the present invention, the U-shaped sealing ring can play a role in strengthening the seal. The opening of the sealing ring faces away from the eccentric valve plate. When the eccentric valve plate presses against the sealing ring, the sealing ring can be deformed and expanded, closely fitting the inner wall of the valve seat, playing a role in strengthening the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 2 is a bottom view of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 3 is a schematic structural diagram of a valve assembly of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 4 is a partial structural schematic diagram of a valve assembly of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 5 is a partial structural combination schematic diagram of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 6 is a schematic structural diagram of a driving rod of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 7Schematic diagram of a partial structure combination of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 8 Schematic diagram of the drive assembly structure of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention; Figure 9 Schematic diagram of the adjustment assembly structure of a three-eccentric U-shaped metal butterfly valve suitable for particulate media according to the present invention.

[0020] In the figure: 1, valve body; 2, drive assembly; 201, fixed plate; 202, motor; 203, rotating shaft; 204, first bevel gear; 205, bracket; 206, drive shaft; 207, first spur gear; 208, second bevel gear; 209, first pulley; 210, belt; 3, adjustment assembly; 301, side frame; 302, rotating tube; 303, card slot; 304, second pulley; 305, movable seat; 306, slide rail; 307, spring; 308, slider; 309, rotating rod; 310, second spur gear; 311, third bevel gear; 312, adjustment rod; 313, card strip; 314, fourth bevel gear; 4, valve assembly; 401, valve seat; 402, sealing ring; 403, eccentric valve plate; 404, first sealing flange; 405, second sealing flange; 406, bolt; 407, plain bearing; 408, toothed ring; 409, first friction ring; 410, fixed sleeve; 411, threaded tube; 412, second friction ring; 5, active rod; 6, third spur gear; 7, handwheel. Detailed implementation mode

[0021] 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.

[0022] Embodiment 1: Please refer to Figures 1-9As shown in the figure, the present invention provides a technical solution: a three-eccentric U-shaped metal butterfly valve suitable for particulate media, comprising a valve body 1, a drive assembly 2, an adjustment assembly 3, a valve assembly 4, and a drive rod 5. The drive assembly 2 is fixedly connected to the valve body 1, and the drive assembly 2 includes a fixing plate 201 and a bracket 205; the adjustment assembly 3 is fixedly connected to the valve body 1, and the adjustment assembly 3 includes a side frame 301 and a slide rail 306; the valve assembly 4 is fixedly connected to the valve body 1, and the valve assembly 4 includes a valve seat 401. First sealing flanges 404 are fixedly installed on both outer surfaces of the valve seat 401. Second sealing flanges 405 are provided on the outer surfaces of the two first sealing flanges 404. An eccentric valve plate 403 is rotatably connected to the inner surface of the valve seat 401. A fixing sleeve 410 is fixedly connected to the outer surface of the valve seat 401. A plurality of circular holes are evenly formed on the outer surface of the fixing sleeve 410. Threaded tubes 411 are rotatably connected to the inner surfaces of the plurality of circular holes. A second friction ring 412 is fixedly connected to the outer surface of the threaded tube 411. A plain bearing 407 is fixedly installed on the outer surface of one of the first sealing flanges 404. A toothed ring 408 is fixedly installed on the outer surface of the plain bearing 407. A first friction ring 409 is fixedly connected to the inner surface of the toothed ring 408. The fixing plate 201 is fixedly connected to the outer surface of the valve body 1. The bracket 205 is fixedly connected to the inner top of the valve body 1. A motor 202 is fixedly connected to the outer surface of the fixing plate 201. The output end of the motor 202 penetrates through the fixing plate 201 and extends to the other side. The output end of the motor 202 is fixedly connected to a rotating shaft 203. A first bevel gear 204 is fixedly connected to the end face of the rotating shaft 203. A drive shaft 206 is rotatably connected through the outer surface of the bracket 205. The end face of the drive shaft 206 is rotatably connected to the outer surface of the valve body 1. A second bevel gear 208 is fixedly connected to the outer surface of the drive shaft 206. The second bevel gear 208 is meshed with the first bevel gear 204. Two first belt pulleys 209 are fixedly connected to the outer surface of the drive shaft 206. Belts 210 are sleeved on the outer surfaces of the two first belt pulleys 209. A first spur gear 207 is fixedly connected to the outer surface of the drive shaft 206. The bracket 205 is located between the first spur gear 207 and the second bevel gear 208. The side frame 301 is fixedly connected to the outer surface of the valve body 1. The slide rail 306 is fixedly connected to the inner top of the valve body 1. A bearing seat is fixedly connected to the outer surface of the side frame 301. A rotating tube 302 is fixedly installed on the inner surface of the bearing seat. A slider 308 is slidably connected to the outer surface of the slide rail 306. A movable seat 305 is fixedly connected to the bottom of the slider 308. A second belt pulley 304 is fixedly connected to the outer surface of the rotating tube 302. The second belt pulley 304 is provided in a matching manner with the belt 210. A spring 307 is fixedly connected between the movable seat 305 and the slide rail 306. An adjustment rod 312 is rotatably connected to the outer surface of the movable seat 305 close to the slider 308. A rotating rod 309 is rotatably connected to the inner top of the movable seat 305. A second spur gear 310 is fixedly connected to the outer surface of the rotating rod 309. A third bevel gear 311 is fixedly connected to the outer surface of the rotating rod 309 at a position close to the lower side of the second spur gear 310. A fourth bevel gear 314 is fixedly connected to the end face of the adjustment rod 312.The fourth bevel gear 314 is meshed and connected with the third bevel gear 311. The adjusting rod 312 is sleeved inside the rotating tube 302. A plurality of clamping grooves 303 are evenly formed on the inner surface of the rotating tube 302. A plurality of clamping bars 313 are evenly and fixedly connected to the outer surface of the adjusting rod 312. The outer surface of the clamping bar 313 is inserted and connected with the inner surface of the clamping groove 303. The driving rod 5 is fixedly connected with the eccentric valve plate 403. A third spur gear 6 is fixedly connected to the outer surface of the driving rod 5. The third spur gear 6 is located inside the valve body 1. The third spur gear 6 is matched with the second spur gear 310 in position. A sealing ring 402 is arranged inside the valve seat 401. The cross section of the sealing ring 402 is U-shaped. The sealing ring 402 is matched with the eccentric valve plate 403 in position. A handwheel 7 is rotatably connected to the outer surface of the valve body 1. The handwheel 7 and the driving rod 5 are provided in a matching manner. A plurality of bolts 406 are evenly inserted between the first sealing flange 404 and the second sealing flange 405. The outer surface of the bolt 406 is threadedly connected with the inner surface of the threaded tube 411. The toothed ring 408 is meshed and connected with the first spur gear 207.,

[0023] The using steps of the present invention: when the three-eccentric U-shaped metal butterfly valve is in use, start the motor 202 during the process of the butterfly valve being put into use. After the motor 202 is started, it can drive the rotating shaft 203 to rotate. Through the rotation of the rotating shaft 203, the first bevel gear 204 can be driven to rotate accordingly. When the first bevel gear 204 rotates, it can drive the driving shaft 206, the first spur gear 207, the second bevel gear 208 and the first belt pulley 209 to rotate simultaneously through the meshing with the second bevel gear 208. When the first spur gear 207 rotates, it can drive the toothed ring 408 to rotate accordingly through the meshing with the toothed ring 408. When the toothed ring 408 rotates, it will drive the first friction ring 409 to rotate accordingly. At this time, with the continuous rotation of the first friction ring 409, the first friction ring 409 can continuously contact the surface of the second friction ring 412. The threaded tube 411 can rotate through the connection with the fixed sleeve 410. Through the internal thread setting of the fixed sleeve 410, the threaded walls on both sides thereof are respectively matched with the bolts 406 on both sides. When the fixed sleeve 410 rotates in the same direction as the force direction of the second friction ring 412, the fixed sleeve 410 can drive the bolts 406 to tighten towards its inside. Therefore, with the rotation of the fixed sleeve 410, the bolts 406 fixed on both sides can be continuously tightened. With the continuous operation of the motor 202, the first friction ring 409 continuously rotates, so that the second friction ring 412 is continuously stressed, that is, the threaded tube 411 can always keep the bolts 406 on both sides in a tightened state under the action of friction. Through the continuous tightened state of the bolts 406, the two groups of first sealing flanges 404 and second sealing flanges 405 can always be kept in a stable pressing and tightening state, so that the sealing state at the connection of the butterfly valve is relatively stable, avoiding the loosening and leakage at the connection of the butterfly valve during the long-term use state of high-speed particulate medium fluid, and effectively improving the stability of the use of the butterfly valve.

[0024] Example 2: As Figures 5-9 shown, a slider 308 is slidably connected to the outer surface of the slide rail 306. A movable seat 305 is fixedly connected to the bottom of the slider 308. A second pulley 304 is fixedly connected to the outer surface of the rotating pipe 302. The second pulley 304 is provided in a matching manner with the belt 210. A spring 307 is fixedly connected between the movable seat 305 and the slide rail 306. A regulating rod 312 is rotatably connected to the outer surface of the movable seat 305 near one side of the slider 308. A rotating rod 309 is rotatably connected to the inner top of the movable seat 305. A second straight gear 310 is fixedly connected to the outer surface of the rotating rod 309. A third bevel gear 311 is fixedly connected to the outer surface of the rotating rod 309 near the lower side of the second straight gear 310. A fourth bevel gear 314 is fixedly connected to the end face of the regulating rod 312. The fourth bevel gear 314 is meshed and connected with the third bevel gear 311. The regulating rod 312 is sleeved inside the rotating pipe 302. A plurality of card slots 303 are evenly formed on the inner surface of the rotating pipe 302. A plurality of card strips 313 are evenly fixedly connected to the outer surface of the regulating rod 312. The outer surface of the card strip 313 is inserted and connected with the inner surface of the card slot 303. The driving rod 5 is fixedly connected to the eccentric valve plate 403. A third straight gear 6 is fixedly connected to the outer surface of the driving rod 5. The third straight gear 6 is located inside the valve body 1. The third straight gear 6 is matched with the position of the second straight gear 310. A hand wheel 7 is rotatably connected to the outer surface of the valve body 1. The hand wheel 7 is provided in a matching manner with the driving rod 5. A plurality of bolts 406 are evenly inserted between the first sealing flange 404 and the second sealing flange 405. The outer surface of the bolt 406 is threadedly connected with the inner surface of the threaded pipe 411. The toothed ring 408 is meshed and connected with the first straight gear 207.

[0025] The using steps of the present invention are as follows. When it is necessary to open the passage at the position of the valve seat 401 to allow the granular medium fluid to flow through, with the rotation of the rotating pipe 302, it can be ensured that the regulating rod 312 can also maintain a rotating state while undergoing displacement. When the regulating rod 312 rotates, it will drive the fourth bevel gear 314 to rotate accordingly. The fourth bevel gear 314 drives the rotating rod 309 and the second straight gear 310 to rotate through meshing with the third bevel gear 311. At this time, by using the rotating second straight gear 310, and at the same time, the movable seat 305 drives the second straight gear 310 to move towards the third straight gear 6. The second straight gear 310 can be advanced to the outer side position of the third straight gear 6. At this time, the rotating second straight gear 310 can drive the third straight gear 6 to rotate accordingly. At this time, the rotation of the third straight gear 6 drives the driving rod 5 to rotate at a constant speed. By using the constant-speed rotation of the driving rod 5, the eccentric valve plate 403 is driven to rotate and open. The eccentric valve plate 403 rotates and opens at a constant speed, making the use of the butterfly valve more stable.

[0026] Example 3: As Figure 3 and Figure 6As shown, a sealing ring 402 is arranged inside the valve seat 401. The cross-section of the sealing ring 402 is U-shaped, and the sealing ring 402 is matched with the position of the eccentric valve plate 403.

[0027] The usage steps of the present invention are as follows. When the three-eccentric U-shaped metal butterfly valve is in use, due to the arrangement of the sealing ring 402 inside the valve seat 401, the U-shaped sealing ring 402 can play a role in enhancing the seal. The opening of the sealing ring 402 faces away from the position of the eccentric valve plate 403. When the eccentric valve plate 403 fits and presses against the sealing ring 402, the sealing ring 402 can be deformed, and the sealing ring 402 can expand and closely fit the inner wall of the valve seat 401, thus playing a role in enhancing the seal.

[0028] The effects and working principle achieved by its entire mechanism are as follows: When the triple-eccentric U-shaped metal butterfly valve is in use, the conveying structure inside the valve body 1 is connected through the handwheel 7. The conveying structure inside the valve body 1 is a worm and gear structure. When the handwheel 7 is rotated, the driving rod 5 can be driven to rotate following the connection of the valve body 1. Through the rotation of the driving rod 5, the eccentric valve plate 403 can be driven to rotate. When the eccentric valve plate 403 is in a vertical state, it is in a fitting state with the inner wall of the valve seat 401. Thus, the passage of the valve seat 401 is blocked by using the eccentric valve plate 403. Through the setting of the sealing ring 402 inside the valve seat 401, the U-shaped sealing ring 402 can play a role in strengthening the seal. The opening of the sealing ring 402 faces away from the position of the eccentric valve plate 403. When the eccentric valve plate 403 fits and squeezes the sealing ring 402, the sealing ring 402 can be deformed, and the sealing ring 402 can expand, tightly fitting the inner wall of the valve seat 401, playing a role in strengthening the seal. When it is necessary to open the passage at the valve seat 401 to allow the granular medium fluid to flow through, rotating the handwheel 7 can drive the eccentric valve plate 403 to rotate. After the eccentric valve plate 403 rotates a certain angle, the position of the valve seat 401 is in a connected state. At this time, the fluid in the pipeline can flow. When installing and using the metal butterfly valve, the pipelines on both sides are respectively connected to two second sealing flanges 405. Two groups of first sealing flanges 404 and second sealing flanges 405 are respectively fixedly installed on both sides of the valve seat 401. When installing the first sealing flange 404 and the second sealing flange 405, the bolt 406 is inserted into the installation holes of the first sealing flange 404 and the second sealing flange 405. At this time, the bolt 406 will pass through the first sealing flange 404 and insert into the threaded pipe 411. Thread grooves corresponding to the outer wall of the bolt 406 are provided in the threaded pipe 411. By screwing the bolt 406, it can be screwed into the threaded pipe 411. After the bolt 406 is screwed tightly into the threaded pipe 411, the first sealing flange 404 and the second sealing flange 405 can be clamped and fixed, completing the fixed installation of the pipeline and the butterfly valve. During the process of the butterfly valve being fixed and put into use, since the bolts 406 on both sides are inserted into the threaded pipe 411 to complete the fixation, at this time, the threaded pipe 411 in the middle position can tighten the bolts 406 on both sides. When the motor 202 is started during the process of the butterfly valve being put into use, after the motor 202 is started, it can drive the rotating shaft 203 to rotate. Through the rotation of the rotating shaft 203, the first bevel gear 204 can be driven to rotate following it. When the first bevel gear 204 rotates, it can drive the drive shaft 206, the first spur gear 207, the second bevel gear 208, and the first belt pulley 209 to rotate simultaneously through meshing with the second bevel gear 208. When the first spur gear 207 rotates, it can drive the toothed ring 408 to rotate following it through meshing with the toothed ring 408. Through the setting of the plain bearing 407, support is provided for the toothed ring 408. When the toothed ring 408 rotates, it will drive the first friction ring 409 to rotate following it. At this time, as the first friction ring 409 continues to rotate,The first friction ring 409 can be in continuous contact with the surface of the second friction ring 412. The threaded pipe 411 can rotate through its connection with the fixed sleeve 410. The fixed sleeve 410 is provided with threads inside, and the threaded walls on both sides thereof are respectively matched with the bolts 406 on both sides. When the fixed sleeve 410 rotates in the same direction as the force receiving direction of the second friction ring 412, the fixed sleeve 410 can drive the bolts 406 to tighten inward. Therefore, as the fixed sleeve 410 rotates, the bolts 406 fixed on both sides can be continuously tightened. As the motor 202 runs continuously, the first friction ring 409 rotates continuously, causing the second friction ring 412 to be continuously stressed. That is, the threaded pipe 411 can keep the bolts 406 on both sides in a tightened state under the action of friction. Through the continuous tightened state of the bolts 406, the two groups of first sealing flanges 404 and second sealing flanges 405 can always maintain a stable pressing and tightening state, so that the sealing state at the connection of the butterfly valve is relatively stable, avoiding leakage caused by loosening at the connection of the butterfly valve during long-term use in a high-speed particulate medium fluid state, effectively improving the stability of the butterfly valve. When the eccentric valve plate 403 needs to be rotated and opened when the butterfly valve is in the closed state, when the motor 202 is in the running state, through the combined use of the adjusting assembly 3 and the driving assembly 2, the eccentric valve plate 403 can be controlled to slowly open while maintaining a uniform speed, ensuring that the fluid impact force received by the butterfly valve is relatively uniform, and avoiding damage caused by sudden large impact force due to uneven rotation speed when the butterfly valve is opened. When performing the opening operation of the eccentric valve plate 403, push the movable seat 305 on either side towards the valve body 1. When the movable seat 305 is displaced, it will compress the spring 307 to contract. At the same time, the movable seat 305 will displace along the slide rail 306 through the connection of the slider 308. At this time, the movable seat 305 can drive the adjusting rod 312 to follow the displacement. At this time, the adjusting rod 312 will slide inside the rotating pipe 302. Through the cooperative setting of the card strip 313 and the card slot 303, the rotating pipe 302 and the adjusting rod 312 can always be kept in a connected state. At this time, when the movable seat 305 is displaced, driven by the motor 202, when the first belt pulley 209 rotates, it can drive the second belt pulley 304 to rotate through the connection of the belt 210. Through the rotation of the second belt pulley 304, the rotating pipe 302 can be driven to rotate. At this time, as the rotating pipe 302 rotates, the adjusting rod 312 can also maintain a rotating state when it is displaced. When the adjusting rod 312 rotates, it will drive the fourth bevel gear 314 to rotate. The fourth bevel gear 314 drives the rotating rod 309 and the second straight gear 310 to rotate through meshing with the third bevel gear 311. At this time, using the rotating second straight gear 310, at the same time, the movable seat 305 drives the second straight gear 310 to push towards the third straight gear 6. The second straight gear 310 can be pushed to the outer position of the third straight gear 6. At this time, the rotating second straight gear 310 can drive the third straight gear 6 to rotate accordingly.At this time, the rotation of the third spur gear 6 drives the driving rod 5 to rotate uniformly, and the uniform rotation of the driving rod 5 drives the eccentric valve plate 403 to rotate and open. The eccentric valve plate 403 remains rotating and opening uniformly, making the use of the butterfly valve relatively stable.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A triple-eccentric U-shaped metal butterfly valve applicable to granular media, comprising a valve body (1), a driving assembly (2), an adjusting assembly (3), a valve assembly (4) and a driving rod (5), characterized in that: The driving assembly (2) is fixedly connected to the valve body (1), and the driving assembly (2) includes a fixing plate (201) and a bracket (205); The adjusting assembly (3) is fixedly connected to the valve body (1), and the adjusting assembly (3) includes a side frame (301) and a slide rail (306); The valve assembly (4) is fixedly connected to the valve body (1), and the valve assembly (4) includes a valve seat (401). First sealing flanges (404) are fixedly installed on the outer surfaces of both sides of the valve seat (401). Second sealing flanges (405) are arranged on the outer surfaces of the two first sealing flanges (404). An eccentric valve plate (403) is rotatably connected to the inner surface of the valve seat (401). A fixing sleeve (410) is fixedly connected to the outer surface of the valve seat (401). A plurality of circular holes are evenly formed in the outer surface of the fixing sleeve (410). Threaded tubes (411) are rotatably connected to the inner surfaces of the plurality of circular holes. A second friction ring (412) is fixedly connected to the outer surface of the threaded tube (411). A plain bearing (407) is fixedly installed on the outer surface of one of the first sealing flanges (404). A toothed ring (408) is fixedly installed on the outer surface of the plain bearing (407). A first friction ring (409) is fixedly connected to the inner surface of the toothed ring (408).

2. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 1, wherein: The fixing plate (201) is fixedly connected to the outer surface of the valve body (1), the bracket (205) is fixedly connected to the inner top of the valve body (1), a motor (202) is fixedly connected to the outer surface of the fixing plate (201), and the output end of the motor (202) penetrates through the fixing plate (201) and extends to the other side.

3. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 2, characterized in that: The output end of the motor (202) is fixedly connected to a rotating shaft (203), a first bevel gear (204) is fixedly connected to the end face of the rotating shaft (203), a driving shaft (206) is rotatably connected through the outer surface of the bracket (205), the end face of the driving shaft (206) is rotatably connected to the outer surface of the valve body (1), a second bevel gear (208) is fixedly connected to the outer surface of the driving shaft (206), and the second bevel gear (208) is meshed with the first bevel gear (204).

4. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 3, wherein: Two first belt pulleys (209) are fixedly connected to the outer surface of the driving shaft (206). Belts (210) are sleeved on the outer surfaces of the two first belt pulleys (209). A first spur gear (207) is fixedly connected to the outer surface of the driving shaft (206). The bracket (205) is located between the first spur gear (207) and the second bevel gear (208).

5. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 4, wherein: The side frame (301) is fixedly connected to the outer surface of the valve body (1). The slide rail (306) is fixedly connected to the inner top of the valve body (1). A bearing seat is fixedly connected to the outer surface of the side frame (301). A rotating tube (302) is fixedly installed on the inner surface of the bearing seat. A slider (308) is slidably connected to the outer surface of the slide rail (306). A movable seat (305) is fixedly connected to the bottom of the slider (308). A second pulley (304) is fixedly connected to the outer surface of the rotating tube (302). The second pulley (304) is provided in a matching manner with a belt (210).

6. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 5, characterized in that: A spring (307) is fixedly connected between the movable seat (305) and the slide rail (306). An adjusting rod (312) is rotatably connected to the outer surface of the side of the movable seat (305) close to the slider (308). A rotating rod (309) is rotatably connected to the inner top of the movable seat (305). A second spur gear (310) is fixedly connected to the outer surface of the rotating rod (309).

7. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 6, characterized in that: A third bevel gear (311) is fixedly connected to the outer surface of the rotating rod (309) at a position below the second spur gear (310). A fourth bevel gear (314) is fixedly connected to the end face of the adjusting rod (312). The fourth bevel gear (314) is meshed and connected with the third bevel gear (311). The adjusting rod (312) is sleeved on the inner side of the rotating tube (302). A plurality of card slots (303) are evenly formed on the inner surface of the rotating tube (302). A plurality of card strips (313) are evenly fixedly connected to the outer surface of the adjusting rod (312). The outer surface of the card strip (313) is inserted and connected with the inner surface of the card slot (303).

8. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 1, characterized in that: The driving rod (5) is fixedly connected to the eccentric valve plate (403). A third spur gear (6) is fixedly connected to the outer surface of the driving rod (5). The third spur gear (6) is located inside the valve body (1). The third spur gear (6) is matched with the second spur gear (310) in position.

9. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 1, wherein: A sealing ring (402) is arranged inside the valve seat (401). The cross section of the sealing ring (402) is U-shaped. The sealing ring (402) is matched with the eccentric valve plate (403) in position. A hand wheel (7) is rotatably connected to the outer surface of the valve body (1). The hand wheel (7) is provided in a matching manner with the driving rod (5).

10. The three-eccentric U-shaped metal butterfly valve applicable to particulate media according to claim 4, wherein: A plurality of bolts (406) are evenly inserted between the first sealing flange (404) and the second sealing flange (405). The outer surface of the bolt (406) is threadedly connected with the inner surface of the threaded tube (411). The toothed ring (408) is meshed and connected with the first spur gear (207).

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