Low-friction high-reliability rigidity valve

Abstract

A low-friction valve element mechanism comprises a plurality of butterfly valve plates arranged in a rigidity valve body shell, an arc-shaped semicircular groove is formed in the outer wall of each butterfly valve plate, and a plurality of miniature rollers are slidably connected to the inner wall of each arc-shaped semicircular groove at equal intervals; according to the rigidity valve, a cylindrical through hole is formed in the center of the top of each butterfly valve block, a limiting guide column is inserted into the inner wall of each cylindrical through hole in a penetrating mode, the diameter of each limiting guide column is smaller than that of the corresponding cylindrical through hole, and therefore the rigidity valve can be adjusted. When the butterfly valve plate is stressed, inclination of the butterfly valve plate cannot be affected, the reset spring at the bottom of the outer wall of the limiting guide column is used for rebounding the stressed pressure, when the rigidity valve is used, the friction force is low under the high-frequency using condition through ball friction, and the service life of the rigidity valve in the using process is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stiffness valve, in particular to low-friction high-reliability stiffness valve. BACKGROUND

[0002] In the fluid control system, the valve as the core component of flow and pressure regulation, its performance directly affects the system stability and energy efficiency. The traditional valve due to high friction coefficient, insufficient structural stiffness, prone to sealing failure, response lag and other problems, especially in high precision control scene, the wear caused by friction will significantly shorten the service life, the lack of stiffness will cause vibration and regulation error, it is difficult to meet the high reliability demand.

[0003] In the actual operation scene of low-friction high-reliability stiffness valve, its core assembly structure is usually composed of shell and butterfly valve plate 201 to form a close connection. Under this structure design, the butterfly valve plate 201 needs to complete the precise reciprocating or rotating action inside the shell to realize the key functions such as medium on-off and flow regulation, however, in the long-term high-frequency work process, the contact surface of the butterfly valve plate 201 and the shell will inevitably produce friction effect due to the continuous relative motion, with the accumulation of use time, the wear caused by friction will gradually change the fit clearance and surface precision of the two: the initial stage may show a slight increase in action resistance, and then the roughness of the contact surface will rise, the fit tolerance will deviate from the design standard, resulting in continuous rise of the friction coefficient. This continuously intensified friction effect not only increases the energy consumption of the driving mechanism, but also significantly shortens the effective service life of the butterfly valve plate 201 and the shell. SUMMARY

[0004] The purpose of the present application is to provide a low-friction high-reliability stiffness valve to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides a low-friction high-reliability stiffness valve, which comprises a stiffness valve body shell, a low-friction valve core mechanism is arranged inside the stiffness valve body shell, and a stiffness adjusting mechanism is arranged at the top of the low-friction valve core mechanism.

[0006] The low-friction valve core mechanism comprises a plurality of butterfly valve plates arranged inside the stiffness valve body shell, an arc semicircular groove is formed in the outer wall of each butterfly valve plate, a plurality of micro rollers are slidably connected to the inner wall of each arc semicircular groove at equal distances, a plurality of semicircular cross-section through grooves are formed in the inner wall of the stiffness valve body shell at equal distances, and the micro rollers are slidably connected to the inner wall of the semicircular cross-section through grooves, a cylindrical connecting pipe is arranged between every two adjacent butterfly valve plates, a plurality of connecting coil springs are fixedly connected around the two ends of each cylindrical connecting pipe, and the other end of each connecting coil spring is fixedly connected to one end of the butterfly valve plate.

[0007] In one example, the two ends of each of the butterfly valve pieces are fixedly connected with elastic sealing rings, the two ends of each of the connecting helical springs are fixedly connected with annular rubber buffer pads, and the annular rubber buffer pads are fixedly connected with the two ends of the cylindrical connecting pipes.

[0008] In one example, the inner walls of each of the semicircular cross-section through grooves are embedded with polytetrafluoroethylene guide sleeves, and the inner walls of each of the polytetrafluoroethylene guide sleeves are provided with guide grooves.

[0009] In one example, the center of the top of each of the butterfly valve pieces is provided with a cylindrical through hole, a limiting guide column is inserted and connected at the center of the top of the cylindrical through hole, a reset spring is sleeved at the bottom of the outer wall of the limiting guide column, and the top of the reset spring is fixedly connected with the bottom of one of the butterfly valve pieces.

[0010] In one example, the bottom of the limiting guide column is fixedly connected with a first limiting plate, the bottom of the reset spring is fixedly connected with the top of the first limiting plate, and the top of the limiting guide column is fixedly connected with a second limiting plate.

[0011] In one example, the inner wall of the stiffness valve body shell is fixedly connected with a first connecting rod, the two sides of the outer wall of the first connecting rod are rotatably connected with first cams, one end of each of the two first cams is rotatably connected with a connecting rod, the other end of each of the two connecting rods is rotatably connected with a piston rod, and the top of the piston rod is fixedly connected with a connecting seat.

[0012] In one example, the stiffness adjusting mechanism comprises a second connecting rod fixedly connected to the top of the inner wall of the stiffness valve body shell, the two sides of the outer wall of the second connecting rod are fixedly connected with second cams, the bottoms of the two second cams are provided with semicircular recesses, and the inner walls of the two semicircular recesses are rotatably connected with guide rollers.

[0013] In one example, the two sides of the outer wall of the stiffness valve body shell are provided with strip-shaped holes, the inner walls of the two strip-shaped holes are rotatably connected with two lead screws, the outer walls of the two lead screws are threadedly connected with threaded blocks, the other sides of the threaded blocks are fixedly connected with the two sides of the second connecting rod, the bottoms of the two lead screws are fixedly connected with rotating handles, one side of the bottom of each of the two threaded blocks is fixedly connected with a dustproof plate, and the dustproof plate is inserted and connected with the inside of the stiffness valve body shell.

[0014] In one example, one side of the outer wall of the stiffness valve body shell is fixedly connected with a scale disc, the center of one side of the scale disc is rotatably connected with a pointer, the center of one side of the pointer is embedded with a torsion spring, the torsion spring is located at the rotating shaft of the pointer, one side of the threaded block is fixedly connected with a lever, and the outer wall of the stiffness valve body shell is embedded with a plurality of heat dissipation fins at equal distances.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. By setting multiple butterfly valve plates inside the rigidity valve valve body shell, arc semicircular grooves are formed on the outer walls of each butterfly valve plate, multiple micro rollers are rotatably connected to the inner walls of the arc semicircular grooves, multiple semicircular cross-section through grooves are formed on the inner walls of the rigidity valve valve body shell, the micro rollers are slidably connected to the inner walls of the semicircular cross-section through grooves, cylindrical connecting pipes are arranged at the connecting portions of every two butterfly valve plates, multiple connecting helical springs are arranged at the two ends of the cylindrical connecting pipes, so that the valve core inside the rigidity valve valve body shell is replaced by multiple independent butterfly valve plates that can slightly float, each butterfly valve plate is connected by the connecting helical springs, when the butterfly valve plates inside are subjected to pressure, the butterfly valve plates can slightly tilt under the action of the pressure, the micro rollers thereon can be in contact with the inner walls of the rigidity valve valve body shell, the sliding friction is changed into rolling friction, the friction is greatly reduced, cylindrical through holes are formed at the centers of the top portions of each butterfly valve plate, limiting guide columns are inserted into the inner walls of each cylindrical through hole, the diameters of the limiting guide columns are smaller than those of the cylindrical through holes, so that the tilting of the butterfly valve plates will not be affected when the butterfly valve plates are subjected to pressure, the reset springs at the bottom portions of the outer walls of the limiting guide columns are used to rebound the pressure, so that the rigidity valve uses ball friction when in use, the friction is low even in high frequency use, the service life of the rigidity valve is improved, the elastic sealing rings arranged at the top and bottom portions of each butterfly valve plate can maintain the internal sealing when the butterfly valve plates slightly tilt, and the annular rubber buffer pads arranged at the two ends of each connecting helical spring can increase the connection tightness between each butterfly valve plate and prevent the connecting helical springs from being broken after long time use.

[0017] 2. By setting the first limiting plate and the second limiting plate on the two sides of the limiting guide column, the limiting guide column not only provides accurate axial guidance for the butterfly valve plate group, but also directly links the maximum stroke and the minimum stroke of the butterfly valve plate, the limiting guide column forces all the butterfly valve plates to move in the same direction, so that the lateral degree of the butterfly valve plates is fixed, the lateral force is prevented from being too large to cause the butterfly valve plates to be stuck, all the springs inside have low hysteresis, low friction and good reset characteristics when in use, the outer edges of the micro rollers of the internal low friction movement roll on the inner walls of the valve body during the movement of the valve plate group, and the friction is extremely low.

[0018] 3. The first connecting rod inside the stiffness valve valve body shell is provided with a first cam outside, a connecting rod is arranged on one side of the first cam, a piston rod is connected to the top of the connecting rod, when the piston rod is pressed, the first cam inside will also rotate downward, thereby amplifying the pressure on the butterfly valve inside, the first cam is converted into the short arm movement of the lever, the butterfly valve is pushed to produce greater axial displacement, making the control signal more sensitive, making it easier to overcome the internal generated viscous force, ensuring faster and more reliable response.

[0019] 4. The second connecting rod inside the stiffness valve valve body shell is provided with a second cam on both sides of the outer wall of the second connecting rod, a semicircular groove is arranged at the bottom of the second cam, a guide roller is arranged inside the semicircular groove, a strip-shaped hole is arranged outside the stiffness valve valve body shell, a screw rod is arranged inside the strip-shaped hole, a threaded block is arranged outside the screw rod, and the other end of the threaded block is connected to both sides of the second connecting rod, so that during use, by rotating the screw rod on both sides, the threaded block on both sides can be driven downward, so that the second cam can press down on both sides of the top of the butterfly valve, thereby extruding the connecting helical spring between each butterfly valve, thereby reducing the distance between each butterfly valve, increasing the rigidity of the butterfly valve inside, thereby increasing the rigidity range of the stiffness valve during use, and the rigidity adjustment can highly match the valve action response characteristics and system control requirements: when rapid adjustment is needed, increasing the rigidity can reduce the elastic deformation of the butterfly valve during movement, making the opening change and the control signal form a precise linear correspondence, avoiding "regulation lag" caused by insufficient rigidity; when fine adjustment is needed, reducing the rigidity can make the butterfly valve more sensitive to small signals, achieving stepless fine adjustment of the flow, at the same time, the low friction characteristic reduces the resistance disturbance of the butterfly valve movement, and cooperates with the rigidity adjustment to greatly reduce the control error of the valve in the full stroke range, in scenes involving high temperature, high pressure or corrosive medium, the rigidity adjustment can ensure the structural stability of the valve under extreme conditions: by optimizing the rigidity parameter, the butterfly valve can avoid being stuck due to thermal expansion and contraction, or structural deformation caused by medium scouring; at the same time, appropriate rigidity can keep the valve at a safe opening position in the event of a sudden failure, preventing excessive leakage of the medium and causing safety accidents.

[0020] 5. The dial on the stiffness valve valve body shell can intuitively see the intensity of the adjustment while adjusting the rigidity, when the threaded block descends, the dial rod on one side will push the bottom pointer to move downward, the pointer will be angularly dials, thereby the intensity of the rigidity adjustment can be intuitively seen on the dial. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the present application is shown in the figure.

[0022] Figure 2 Structure diagram of the valve body shell of the rigidity valve of the present application;

[0023] Figure 3 Structure diagram of the cross section of the valve body shell of the rigidity valve of the present application;

[0024] Figure 4 Structure diagram of the connection relationship of the butterfly valve plate of the present application;

[0025] Figure 5 Structure diagram of the position of the limiting guide column of the present application;

[0026] Figure 6 Structure diagram of the first cam position of the present application.

[0027] Figure 7 Structure diagram of the rigidity adjusting mechanism of the present application.

[0028] Figure 8 Structure diagram of the enlarged structure at A of the present application.

[0029] In the figure: 1, valve body shell of the rigidity valve; 2, low friction valve core mechanism; 201, butterfly valve plate; 202, arc-shaped semicircular groove; 203, micro roller; 204, semicircular cross-section through groove; 205, cylindrical through hole; 206, cylindrical connecting pipe; 207, connecting coil spring; 208, limiting guide column; 209, return spring; 210, first limiting plate; 211, second limiting plate; 212, first connecting rod; 213, first cam; 214, connecting rod; 215, piston rod; 216, connecting seat; 217, elastic sealing ring; 218, annular rubber buffer pad; 219, polytetrafluoroethylene guide sleeve; 220, guide groove; 3, rigidity adjusting mechanism; 301, second connecting rod; 302, second cam; 303, semicircular groove; 304, guide roller; 305, strip-shaped hole; 306, screw rod; 307, threaded block; 308, rotating handle; 309, dustproof plate; 310, dial; 311, pointer; 312, torsion spring; 313, lever; 4, heat dissipation fin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0031] Please refer to Figures 1-8The application provides a technical scheme: a low-friction high-reliability stiffness valve, which comprises a stiffness valve body shell 1, the inside of the stiffness valve body shell 1 is provided with a low-friction valve core mechanism 2, and the top of the low-friction valve core mechanism 2 is provided with a stiffness adjusting mechanism 3.

[0032] The low-friction valve core mechanism 2 comprises a plurality of butterfly valve plates 201 arranged in the inside of the stiffness valve body shell 1, the outer wall of each butterfly valve plate 201 is provided with an arc semicircular groove 202, the inner wall of each arc semicircular groove 202 is slidably connected with a plurality of micro rollers 203 at equal distances, the inner wall of the stiffness valve body shell 1 is provided with a plurality of semicircular cross-section through grooves 204 at equal distances, the micro rollers 203 are slidably connected with the inner wall of the semicircular cross-section through grooves 204, a cylindrical connecting pipe 206 is arranged between every two adjacent butterfly valve plates 201, a plurality of connecting helical springs 207 are fixedly connected around the two ends of each cylindrical connecting pipe 206, and the other end of each connecting helical spring 207 is fixedly connected with one end of the butterfly valve plate 201.

[0033] The two ends of each butterfly valve plate 201 are fixedly connected with elastic sealing rings 217, the two ends of each connecting helical spring 207 are fixedly connected with annular rubber buffer pads 218, and the annular rubber buffer pads 218 are fixedly connected with the two ends of the cylindrical connecting pipe 206.

[0034] The inner wall of each semicircular cross-section through groove 204 is embedded with a polytetrafluoroethylene guide sleeve 219, and the inner wall of each polytetrafluoroethylene guide sleeve 219 is provided with a guide groove 220.

[0035] A cylindrical through hole 205 is arranged at the center of the top of each butterfly valve plate 201, a limiting guide column 208 is connected at the center of the top of the cylindrical through hole 205, a reset spring 209 is arranged on the bottom of the outer wall of the limiting guide column 208, and the top of the reset spring 209 is fixedly connected with the bottom of one of the butterfly valve plates 201.

[0036] In use, through the setting in the stiffness valve valve body shell 1 inside multiple butterfly valve piece 201, in each butterfly valve piece 201 The outer wall is provided with arc semicircular groove 202, and the inner wall of arc semicircular groove 202 is rotatably connected with multiple micro roller 203, and multiple semicircular cross section through groove 204 is arranged on the inner wall of stiffness valve valve body shell 1, micro roller 203 is slidably connected with the inner wall of semicircular cross section through groove 204, and cylindrical connecting pipe 206 is arranged at the connecting position of every two butterfly valve pieces 201, and multiple connecting helical springs 207 are arranged at both ends of cylindrical connecting pipe 206, so that in the process of use, the valve core inside the stiffness valve valve body shell 1 is replaced by multiple independent butterfly valve pieces 201 which can slightly float, and each butterfly valve piece 201 is connected by connecting helical spring 207, when the butterfly valve piece 201 inside is subjected to pressure, the butterfly valve piece 201 can be slightly inclined under the action of pressure, ensure that the micro roller 203 on it can be used to contact the inner wall of the stiffness valve valve body shell 1, so that the sliding friction is changed to rolling friction, greatly reducing the friction, and cylindrical through hole 205 is arranged at the center of the top of each butterfly valve piece 201, and limiting guide column 208 is inserted into the inner wall of each cylindrical through hole 205, the diameter of limiting guide column 208 is smaller than that of cylindrical through hole 205, so that the inclination of butterfly valve piece 201 will not be affected when it is subjected to pressure, the reset spring 209 located at the bottom of the outer wall of the limiting guide column 208 is used to rebound the pressure received, so that the stiffness valve uses ball friction when in use, which also has low friction in the case of high frequency use, improves the service life of the stiffness valve in use, the elastic sealing ring 217 arranged at the top and bottom of each butterfly valve piece 201 can maintain the internal sealing when the butterfly valve piece 201 is slightly inclined, and the annular rubber buffer pad 218 arranged at both ends of each connecting helical spring 207 can increase the connection tightness between each butterfly valve piece 201 in the process of use, and prevent the connecting helical spring 207 from breaking in the case of long time use.

[0037] Further, the bottom of the limiting guide column 208 is fixedly connected with the first limiting plate 210, and the bottom of the reset spring 209 is fixedly connected with the top of the first limiting plate 210, and the top of the limiting guide column 208 is fixedly connected with the second limiting plate 211;

[0038] When in use, the limiting guide column 208 not only provides accurate axial guidance for the group of butterfly valve plates 201 through the first limiting plate 210 and the second limiting plate 211 arranged on both sides of the limiting guide column 208, but also directly links the maximum stroke and the minimum stroke of the butterfly valve plates 201 through the first limiting plate 210 and the second limiting plate 211 arranged on both sides of the limiting guide column 208. In addition, the limiting guide column 208 forces all the butterfly valve plates 201 to move in the same direction, so that the lateral degree of the butterfly valve plates 201 is fixed, preventing the butterfly valve plates 201 from being stuck due to excessive lateral force. Moreover, all the springs inside have low friction and good reset characteristics during use. The low-friction movement inside the valve plate group during movement, the outer edge of the micro-roller 203 rolls on the inner wall of the valve body, and the friction is extremely low.

[0039] Further, the inner wall of the rigidity valve body shell 1 is fixedly connected with a first connecting rod 212, the outer wall of the first connecting rod 212 is rotatably connected with a first cam 213 on both sides, one end of the two first cams 213 is rotatably connected with a connecting rod 214, the other end of the two connecting rods 214 is rotatably connected with a piston rod 215, and the center of the top of the piston rod 215 is fixedly connected with a connecting seat 216.

[0040] The first connecting rod 212 arranged inside the rigidity valve body shell 1 is provided with a first cam 213 outside, a connecting rod 214 is arranged on one side of the first cam 213, and the top of the connecting rod 214 is connected with a piston rod 215. When the piston rod 215 is subjected to pressure, the first cam 213 inside will also rotate downward, thereby amplifying the pressure on the butterfly valve plates 201 inside, converting the short arm movement of the lever through the first cam 213, and pushing the butterfly valve plates 201 to produce greater axial displacement, making the control signal more sensitive, and overcoming the viscous force produced inside, ensuring faster and more reliable response.

[0041] Further, the rigidity adjusting mechanism 3 includes a second connecting rod 301 fixedly connected to the top inner wall of the rigidity valve body shell 1, a second cam 302 fixedly connected to the outer wall of the second connecting rod 301 on both sides, a semicircular groove 303 arranged in the bottom of the two second cams 302, and a guide roller 304 rotatably connected to the inner wall of the two semicircular grooves 303.

[0042] Two strip-shaped holes 305 are arranged on the two sides of the outer wall of the rigidity valve valve body shell 1, the inner walls of the two strip-shaped holes 305 are rotationally connected with two lead screws 306, the outer walls of the two lead screws 306 are threadedly connected with two threaded blocks 307, the other side of the threaded block 307 is fixedly connected with the two sides of the second connecting rod 301, the bottoms of the two lead screws 306 are fixedly connected with two rotating handles 308, one side of the bottom of each threaded block 307 is fixedly connected with a dustproof plate 309, and the dustproof plate 309 is in plug connection with the inside of the rigidity valve valve body shell 1.

[0043] In use, the second connecting rod 301 arranged in the rigidity valve valve body shell 1, the second connecting rod 301 is provided with a second cam 302 on the two sides of the outer wall, and a semicircular groove 303 is arranged at the bottom of the second cam 302, and a guide roller 304 is arranged in the semicircular groove 303, and a strip-shaped hole 305 is arranged on the outside of the rigidity valve valve body shell 1, a lead screw 306 is arranged in the strip-shaped hole 305, a threaded block 307 is arranged on the outside of the lead screw 306, and the other end of the threaded block 307 is connected with the two sides of the second connecting rod 301, so that in the process of use, by rotating the two lead screws 306, the two threaded blocks 307 on the two sides can be driven to move downward, so that the second cam 302 can press downward on the two sides of the top of the butterfly valve plate 201, thereby the connecting helical spring 207 between each butterfly valve plate 201 can be extruded, thereby reducing the spacing between each butterfly valve plate 201, increasing the rigidity of the butterfly valve plate 201 inside, thereby increasing the rigidity range of the rigidity valve in use, and the rigidity adjustment can highly match the action response characteristics of the valve and the system control requirements: when rapid adjustment is needed, increasing the rigidity can reduce the elastic deformation of the butterfly valve plate 201 in motion, so that the opening degree change and the control signal form a precise linear corresponding relationship, avoiding "regulation lag" caused by insufficient rigidity; when fine adjustment is needed, reducing the rigidity can make the butterfly valve plate 201 more sensitive to small signals, realizing stepless fine adjustment of the flow, at the same time, the low friction characteristic reduces the resistance disturbance of the butterfly valve plate 201 in motion, which cooperates with the rigidity adjustment to greatly reduce the control error of the valve in the whole stroke range, in the scene involving high temperature, high pressure or corrosive medium, the rigidity adjustment can ensure the structural stability of the valve under extreme conditions: by optimizing the rigidity parameter, the butterfly valve plate 201 can avoid being stuck due to thermal expansion and contraction, or structural deformation caused by medium scouring; at the same time, appropriate rigidity can make the valve maintain at a safe opening degree position when a sudden fault occurs, preventing safety accidents caused by excessive leakage of medium.

[0044] The outer wall of the rigidity valve valve body shell 1 is fixedly connected with a scale disc 310 on one side, the center of one side of the scale disc 310 is rotatably connected with a pointer 311, the center of one side of the pointer 311 is embedded with a torsion spring 312, and the torsion spring 312 is located at the rotating shaft of the pointer 311, one side of the threaded block 307 is fixedly connected with a push rod 313, and the outer wall of the rigidity valve valve body shell 1 is embedded with a plurality of heat dissipation fins 4 at equal intervals.

[0045] The scale disc 310 located on the rigidity valve valve body shell 1 can intuitively see the intensity of the adjustment while adjusting the rigidity, when the threaded block 307 descends, the push rod 313 on one side will push the pointer 311 at the bottom to displace downward, and the pointer 311 will be angularly actuated, so that the intensity of the rigidity adjustment can be intuitively seen on the scale disc 310.

[0046] Each of the embodiments in the specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments. Especially, for the system embodiment, since it is basically similar to the method embodiment, it is described more simply, and the related parts can be referred to the part of the method embodiment

[0047] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A low-friction, high-reliability rigidity valve, comprising a rigidity valve body housing (1), a low-friction valve core mechanism (2) being provided inside the rigidity valve body housing (1), and a rigidity adjustment mechanism (3) being provided on the top of the low-friction valve core mechanism (2); Its characteristics are: The low-friction valve core mechanism (2) comprises a plurality of butterfly valve discs (201) arranged inside a rigid valve body shell (1); an outer wall of each of the butterfly valve discs (201) is provided with an arcuate semicircular groove (202); the inner wall of each of the arcuate semicircular grooves (202) is equidistantly and slidingly connected to a plurality of micro rollers (203); the inner wall of the rigid valve body shell (1) is provided with a plurality of semicircular cross-section through grooves (204) equidistantly; the micro rollers (203) are slidably connected to the inner walls of the semicircular cross-section through grooves (204); a cylindrical connecting tube (206) is provided between each two adjacent butterfly valve discs (201); a plurality of connecting coil springs (207) are fixedly connected around both ends of each cylindrical connecting tube (206), and the other end of the connecting coil spring (207) is fixedly connected to one end of the butterfly valve disc (201).

2. The low-friction, high-reliability, stiffness valve according to claim 1, characterized in that: Both ends of each butterfly valve disc (201) are fixedly connected to an elastic sealing ring (217), both ends of each connecting coil spring (207) are fixedly connected to an annular rubber buffer pad (218), and the annular rubber buffer pad (218) is fixedly connected to both ends of the cylindrical connecting pipe (206).

3. The low-friction, high-reliability, stiffness valve according to claim 1, characterized in that: A polytetrafluoroethylene guide sleeve (219) is embedded in the inner wall of each semicircular cross-section through groove (204), and a guide groove (220) is formed at the beginning of the inner wall of each polytetrafluoroethylene guide sleeve (219).

4. The low-friction, high-reliability, stiffness valve according to claim 1, characterized in that: A cylindrical through hole (205) is provided at the center of the top of each butterfly valve disc (201), a limiting guide post (208) is inserted and connected at the center of the top of the cylindrical through hole (205), a reset spring (209) is sleeved on the bottom of the outer wall of the limiting guide post (208), and the top of the reset spring (209) is fixedly connected to the bottom of one of the butterfly valve discs (201).

5. The low-friction, high-reliability, stiffness valve according to claim 4, characterized in that: The bottom of the limiting guide column (208) is fixedly connected to a first limiting plate (210), and the bottom of the return spring (209) is fixedly connected to the top of the first limiting plate (210), and the top of the limiting guide column (208) is fixedly connected to a second limiting plate (211).

6. The low-friction, high-reliability, stiffness valve according to claim 1, characterized in that: The inner wall of the rigidity valve body shell (1) is fixedly connected to a first connecting rod (212), both sides of the outer wall of the first connecting rod (212) are rotatably connected to first cams (213), one end of each of the two first cams (213) is rotatably connected to a connecting rod (214), the other ends of the two connecting rods (214) are rotatably connected to a piston rod (215), and a connecting seat (216) is fixedly connected to the center of the top of the piston rod (215).

7. The low-friction, high-reliability, stiffness valve according to claim 1, characterized in that: The stiffness adjustment mechanism (3) comprises a second connecting rod (301) fixedly connected to the top of the inner wall of the stiffness valve body shell (1); second cams (302) are fixedly connected to both sides of the outer wall of the second connecting rod (301); the bottoms of the two second cams (302) are each provided with a semicircular groove (303); and the inner walls of the two semicircular grooves (303) are rotatably connected to guide rollers (304).

8. The low-friction, high-reliability, stiffness valve according to claim 7, characterized in that: The outer wall of the rigidity valve body shell (1) is provided with strip holes (305) on both sides, the inner walls of the two strip holes (305) are rotatably connected to two screw rods (306), the outer walls of the two screw rods (306) are threadedly connected to threaded blocks (307), and the other sides of the threaded blocks (307) are fixedly connected to the two sides of the second connecting rod (301), the bottoms of the two screw rods (306) are fixedly connected to rotating handles (308), and one side of the bottoms of the two threaded blocks (307) are fixedly connected to dustproof plates (309), and the dustproof plates (309) are interlaced and connected to the interior of the rigidity valve body shell (1).

9. The low-friction, high-reliability, stiffness valve according to claim 8, characterized in that: A dial (310) is fixedly connected to one side of the outer wall of the rigidity valve body shell (1); a pointer (311) is rotatably connected to the center of one side of the dial (310); a torsion spring (312) is embedded in the center of one side of the pointer (311), and the torsion spring (312) is located at the rotation axis of the pointer (311); a shift rod (313) is fixedly connected to one side of the threaded block (307); and a plurality of heat dissipation fins (4) are embedded at equal distances on the outer wall of the rigidity valve body shell (1).

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