Polishing device for valve plate of butterfly valve

Abstract

The butterfly valve plate grinding device comprises first conveying belts, second conveying belts and a third conveying belt which are consistent in conveying direction, the two first conveying belts are parallel to each other, a first gap exists between the two first conveying belts, the two second conveying belts are parallel to each other, and a second gap exists between the two second conveying belts. A platform is arranged between the first conveying belt and the second conveying belt, the two third conveying belts are arranged on the two sides of the platform, control pieces are arranged on the third conveying belts, a sensor is arranged between the first conveying belt and the third conveying belts, a pressing part is arranged above the platform, a first telescopic rod is arranged on the pressing part, and a first groove and a second groove are formed in the opposite faces of the platform and the pressing part respectively. Compared with the prior art, the grinding device has the advantages that the clamping effect is better, the valve body is prevented from rotating during grinding, the grinding effect is better, the grinding efficiency is higher, and the safety is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of butterfly valve processing, and particularly relates to a butterfly valve plate polishing device. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve characterized by its simple structure, compact size, light weight, reduced material consumption, compact installation dimensions, rapid opening and closing, and low actuation torque. It is used to cut off, connect, and regulate the flow of media in pipelines, and offers excellent fluid control and sealing properties. A butterfly valve typically consists of a valve body, valve seat, valve plate, and valve stem. The valve plate typically consists of a shaft, into which the valve stem passes, and a plate body positioned on either side of the shaft.

[0003] In order to prevent the burrs from affecting the assembly and use of the valve plate, the valve plate usually needs to undergo a grinding process. The grinding process can remove the burrs on the valve plate to obtain a higher quality component.

[0004] The traditional grinding process usually involves workers holding the valve plate and grinding it with a grinding disc. This not only has low grinding efficiency but also poses certain safety risks. Application No. 202121428251.1 discloses a device for grinding butterfly valve plates, which solves the above problems, but still has the following problems: (1) Before using the device, workers are required to move the valve plate to be ground to a suitable grinding position. After use, workers are required to manually remove the polished valve plate from the device. Moreover, the grinding process and the storage and retrieval process cannot be carried out at the same time, making the entire grinding process inefficient; (2) The device is clamped by an upper pressure plate and a lower top plate, but the thickness of the existing shaft cylinder is usually higher than the thickness of the plate body. The device cannot perform stable clamping, affecting the grinding effect; (3) The device only grinds the outer edge of the valve plate, and does not grind the inside of the shaft cylinder and the junction between the end face of the plate body and the outer edge. The grinding effect may not meet expectations. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a grinding device for a butterfly valve plate, which has higher grinding efficiency and better grinding effect than the prior art.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a butterfly valve plate grinding device, comprising a conveyor belt 1, a conveyor belt 2 and a conveyor belt 3 with consistent conveying directions, two conveyor belts 1 and the two conveyor belts 1 are parallel to each other, and there is a gap 1 between the two conveyor belts 1, two conveyor belts 2 and the two conveyor belts 2 are parallel to each other, and there is a gap 2 between the two conveyor belts 2, a platform is provided between the conveyor belt 1 and the conveyor belt 2, two conveyor belts 3 are provided and are arranged on both sides of the platform, a control member for controlling the movement of the conveyor belt 3 in the vertical direction is provided on the conveyor belt 3, a sensor is provided between the conveyor belt 1 and the conveyor belt 3, a pressing part is provided above the platform, a telescopic rod 1 for controlling the movement of the pressing part in the vertical direction is provided on the pressing part, groove 1 and groove 2 are respectively provided on the opposite surfaces of the platform and the pressing part, the groove 1 and groove 2 are consistent in shape and are arranged opposite to each other, a grinding part is provided at the outer edge of the platform, and the grinding part is provided with a fixing part for driving the grinding part to rotate along the center line of the platform.

[0007] Using this solution, when polishing is required, a worker places the valve plate on conveyor belt one and aligns the shaft barrel with gap one. Conveyor belt one can accommodate multiple valve plates. When a valve plate moves along conveyor belt one to conveyor belt three, a sensor detects it and stops conveyor belt one. The valve plate on conveyor belt three then moves along conveyor belt three to between the platform and the pressing section. Telescopic rod one controls the pressing section to move closer to the platform, while a control unit controls conveyor belt three to move downward until the platform and the pressing section clamp the valve plate securely. The shapes of grooves one and two align with the outer wall of the shaft barrel, ensuring a better fixation. After the fixation is completed, the polishing part polishes the valve plate under the action of the fixing part. After the polishing is completed, the telescopic rod 1 controls the pressing part to move away from the platform. At the same time, the control part controls the conveyor belt 3 to move upward until the plate body of the valve plate contacts the conveyor belt 3 again. At this time, there is a gap between the valve plate and the platform. Then the conveyor belt 3 moves the polished valve plate to the conveyor belt 2. The conveyor belt 2 can directly move the polished valve plate to the next process, or a collection box can be set on the side of the conveyor belt 2 away from the platform.

[0008] The sensor can be an infrared sensor or a light-sensitive sensor. The number and style of the groove one and the groove two are different depending on the polished valve plate.

[0009] Compared with the existing technology, the present invention has a better clamping effect, preventing the valve body from rotating during grinding, and achieving a better grinding effect. Compared with the existing technology, the present invention requires less manual intervention, and grinding and placement can be carried out simultaneously, which increases grinding efficiency and safety.

[0010] As a further configuration of the present invention, the platform is provided with a limit block 1 and a limit block 2 on both sides close to conveyor belt 1 and conveyor belt 2 respectively. The limit block 1 is provided with a movable part 1 for controlling the limit block 1 to move in a horizontal direction perpendicular to the conveying direction of conveyor belt 1. The limit block 2 is provided with a movable part 2 for controlling the limit block 2 to move in a horizontal direction perpendicular to the conveying direction of conveyor belt 2. The limit block 1 has two pieces, and the two limit blocks 1 have opposite surfaces provided with an arc surface 1 facing the platform. The limit block 2 has two pieces, and the two limit blocks 2 have opposite surfaces provided with an arc surface 2 facing the platform. The arc surface 1 and the arc surface 2 are both arcs smaller than 1 / 4.

[0011] According to the above scheme, before the valve plate enters conveyor belt 3, two limit blocks 1 are located on both sides of conveyor belt 3, and two limit blocks 2 are located on both sides of conveyor belt 3. After the valve plate moves between the platform and the pressing part through conveyor belt 3 and conveyor belt 3 moves downward under the action of the control member, the two limit blocks 1 move closer to each other under the control of the moving member 1, and the two limit blocks 2 move closer to each other under the control of the moving member 2 until the arc surface 1 and the arc surface 2 both abut against the outer edge of the plate body of the valve plate, thereby adjusting the position of the valve plate on the platform. During grinding, as the fixed part drives the grinding part to rotate, the limit blocks 1 and 2 are cleared by the action of the moving member 1 and the moving member 2 to allow the grinding part to move, and then return to the abutting state after the grinding part passes. After grinding is completed, the moving member 2 moves the two limit blocks 2 away from each other, and the moving member 1 moves the two limit blocks 1 away from each other. Conveyor belt 3 rises to the same height as conveyor belt 1 under the action of the control member, facilitating the movement of the valve plate on conveyor belt 1 to conveyor belt 3.

[0012] The limiting block 1, limiting block 2, platform and pressing end act simultaneously, so that the valve plate will not be displaced during grinding, thus ensuring the grinding effect.

[0013] As a further configuration of the present invention, the polishing part includes a vertically arranged telescopic rod 2, a rotating motor 1, a rotating motor 2, a brush 1 and a brush 2, the rotating motor 1 and the rotating motor 2 are both arranged on the telescopic rod 2, the brush 1 is fixed to the rotating shaft of the rotating motor 1, the rotating shaft of the rotating motor 1 extends in the horizontal direction, the brush 2 is fixed to the rotating shaft of the rotating motor 2, the brush 2 is arranged below the brush 1, and the rotating shaft of the rotating motor 2 extends in the vertical direction.

[0014] With this solution, telescopic rod 2 controls the height of brushes 1 and 2, facilitating both movement of the valve plate between the platform and the pressing portion and removal from between them. During polishing, telescopic rod 2 extends downward, allowing brushes 1 and 2 to contact the edge of the end face and the outer edge of the valve plate, respectively, improving the polishing effect.

[0015] As a further configuration of the present invention, the polishing part also includes a rotating motor three, a brush three and a horizontally retractable telescopic rod three. The rotating motor three is fixed to the telescopic rod two through the telescopic rod three. The brush three is fixed to the rotating shaft of the rotating motor three. The rotating shaft of the rotating motor three is parallel to the rotating shaft of the rotating motor one. The brush three is arranged below the brush two.

[0016] With the above solution, during grinding, telescopic rod three controls the movement of brush three, so that brush three and brush one are respectively located at the two ends of the valve plate, thereby improving the grinding effect. When the grinding part passes through the position where the shaft tube is located, brush one and brush three produce a certain deformation, so that brush one, brush two and brush three fit the outer wall of the shaft tube.

[0017] As a further configuration of the present invention, the height of the platform is lower than conveyor belt 1 and conveyor belt 2, a push rod 1 extending toward the platform is provided in the gap 1, a brush 4 is provided at one end of the push rod 1 facing the platform, the minimum distance between the two limit blocks 1 is greater than the diameter of the brush 4, the height of the brush 4 is lower than conveyor belt 1, a push rod 2 extending toward the platform is provided in the gap 2, a brush 5 is provided at one end of the push rod 2 facing the platform, the minimum distance between the two limit blocks 2 is greater than the diameter of the brush 5, the height of the brush 5 is lower than conveyor belt 2, the axes of the push rod 1 and the push rod 2 coincide, and the cross-sections of the brush 4 and the brush 5 along the axis of the push rod 1 are both T-shaped.

[0018] With the above solution, during grinding, push rods 1 and 2 allow brushes 4 and 5 to extend into the shaft barrel, grinding the inner wall and the barrel opening of the shaft barrel, thereby improving the grinding effect. Brushes 4 and 5 exit the shaft barrel when passing through the grinding section, making it easier for brushes 1, 2, and 3 to pass through.

[0019] As a further configuration of the present invention, the fixing part is annular and is sleeved on the outside of the telescopic rod one, the grinding part is fixed on the fixing part through the telescopic rod two, two groups of grinding parts are fixed on the fixing part, and the two grinding parts are rotationally symmetrical along the center line of the fixing part.

[0020] By adopting the above solution, the grinding part can move stably.

[0021] As a further configuration of the present invention, a limit block three is provided between the conveyor belt one and the conveyor belt three, and a moving part three is provided on the side of the limit block three for moving the limit block three in a horizontal direction perpendicular to the conveyor belt one.

[0022] With the above solution, the limit block three is used to block the valve plate. When the conveyor belt stops, it prevents the valve plate from moving toward the platform under the action of inertia, thereby ensuring smooth grinding.

[0023] As a further configuration of the present invention, there are two limit blocks three and they are mirror-imaged, and arc surfaces three are provided on the opposite surfaces of the two limit blocks three. The arc surfaces three are all arcs less than or equal to 1 / 4 and the arc surfaces three face away from the platform.

[0024] By adopting the above solution, the arc surface can better intercept the valve plate.

[0025] As a further configuration of the present invention, both the surface of the platform facing the pressing portion and the surface of the pressing portion facing the platform are provided with an anti-slip layer, and the anti-slip layer is provided with a wavy pattern.

[0026] In the above solution, the anti-slip layer is preferably made of rubber to prevent the valve plate from shifting during the grinding process.

[0027] As a further configuration of the present invention, the width between the two conveyor belts one is consistent with the width between the two conveyor belts two, and the width between the two conveyor belts three is greater than the width between the two conveyor belts one.

[0028] The above solution ensures that the valve plates on conveyor belt 1 and conveyor belt 2 move in a straight line, and the width between the two conveyor belts 3 ensures the width of the flat belt, thereby ensuring the fixing effect of the platform and the pressing part.

[0029] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attachment Figure 1 This is a schematic diagram of a polishing state of a specific embodiment of the present invention;

[0031] Attachment Figure 2 This is a schematic diagram of an unpolished state of a specific embodiment of the present invention;

[0032] Attachment Figure 3 It is a schematic cross-sectional view of the grinding part of a specific embodiment of the present invention.

[0033] Conveyor belt 11, gap 12, conveyor belt 21, gap 22, conveyor belt 3, control part 31, platform 4, groove 141, sensor 5, pressing part 6, telescopic rod 1 61, groove 2 62, grinding part 7, telescopic rod 2 71, rotating motor 1 72, rotating motor 2 73, rotating motor 3 74, brush 1 75, brush 2 76, brush 3 77, telescopic rod 3 78, push rod 1 79, brush Four 791, push rod two 710, brush five 7101, fixed part 81, support ring 82, plane bearing 83, support foot 84, drive motor 85, gear 851, limit block one 91, arc surface one 911, moving part one 92, limit block two 101, arc surface two 1011, moving part two 102, limit block three a1, arc surface three a2, moving part three a3, valve plate b, plate body b1, shaft cylinder b2. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positions refer to the directions and positions in actual use of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0036] Specific embodiments of the present invention are Figure 1-3 shown.

[0037] A butterfly valve plate b polishing device includes a conveyor belt 11, a conveyor belt 21 and a conveyor belt 3 with consistent conveying directions. There are two conveyor belts 11 and the two conveyor belts 11 are parallel to each other. There is a gap 12 between the two conveyor belts 11. There are two conveyor belts 21 and the two conveyor belts 21 are parallel to each other. There is a gap 22 between the two conveyor belts 21. A platform 4 is provided between conveyor belt 11 and conveyor belt 21. There are two conveyor belts 33 and they are arranged on both sides of the platform 4. A control part 31 for controlling the movement of conveyor belt 33 in the vertical direction is provided on conveyor belt 33. A sensor 5 is provided between conveyor belt 11 and conveyor belt 33.

[0038] A pressing part 6 is provided above the platform 4, and a telescopic rod 61 is provided on the pressing part 6 for controlling the movement of the pressing part 6 in the vertical direction. A groove 41 and a groove 62 are respectively provided on the opposite surfaces of the platform 4 and the pressing part 6. The groove 41 and the groove 62 are of the same shape and are arranged opposite to each other. A grinding part 7 is provided at the outer edge of the platform 4, and a fixing part 81 is provided on the grinding part 7 for driving the grinding part 7 to rotate along the center line of the platform 4. The fixing part 81 is annular and is sleeved on the outside of the telescopic rod 61.

[0039] The platform 4 is provided with a limit block 191 and a limit block 21 on both sides near the conveyor belt 11 and the conveyor belt 2 21 respectively. The limit block 191 is provided with a moving part 192 for controlling the limit block 191 to move in a horizontal direction perpendicular to the conveying direction of the conveyor belt 11. The limit block 2 101 is provided with a moving part 2 102 for controlling the limit block 2 101 to move in a horizontal direction perpendicular to the conveying direction of the conveyor belt 2 21. There are two limit blocks 191 and the opposite surfaces of the two limit blocks 191 are provided with an arc surface 1911 facing the platform 4. There are two limit blocks 101 and the opposite surfaces of the two limit blocks 2 101 are provided with an arc surface 2 1011 facing the platform 4. The arc surface 1 911 and the arc surface 2 1011 are both arcs less than 1 / 4.

[0040] When polishing is required, the worker places the plate body b1 of the valve plate b on the conveyor belt 11 and aligns the shaft cylinder b2 with the gap 12. Multiple valve plates b can be placed on the conveyor belt 11. Before the valve plate b enters the conveyor belt 3 3, the two limit blocks 1 91 are located on both sides of the two conveyor belts 3 3, and the two limit blocks 2 101 are located on both sides of the two conveyor belts 3 3. When a valve plate b moves to the conveyor belt 3 3 along with the conveyor belt 1 11, the sensor 5 is sensed and the conveyor belt 11 stops moving. The valve plate b on the conveyor belt three 3 moves to between the platform 4 and the pressing part 6 along with the conveyor belt three 3. At the same time, the telescopic rod one 61 controls the pressing part 6 to move in the direction close to the platform 4. The control part 31 controls the conveyor belt three 3 to move downward. After the conveyor belt three 3 moves downward to the predetermined position, the two limit blocks one 91 approach each other under the control of the moving part one 92, and the two limit blocks two 101 approach each other under the control of the moving part two 102 until the arc surface one 911 and the arc surface two 1011 both abut against the outer edge of the plate body b1 of the valve plate b, and the position of the valve plate b on the platform 4 can be adjusted. Then the platform 4 and the pressing part 6 clamp the valve plate b, and the shapes of the groove one 41 and the groove two 62 fit the outer wall of the shaft cylinder b2. The limit blocks one 91, the limit blocks two 101, the platform 4 and the pressing end act at the same time, so that the valve plate b will not be displaced during grinding, thereby ensuring the grinding effect.

[0041] After the fixation is completed, the grinding part 7 grinds the valve plate b under the action of the fixing part 81. During grinding, as the fixing part 81 drives the grinding part 7 to rotate, the limit block 1 91 and the limit block 2 101 leave a gap for the grinding part 7 to move under the action of the moving part 1 92 and the moving part 2 102, and restore the abutment state after the grinding part 7 passes. After polishing is completed, the telescopic rod 61 controls the pressing part 6 to move away from the platform 4. At the same time, the moving part 2 102 makes the two limit blocks 2 101 move away from each other, and the moving part 1 92 makes the two limit blocks 1 91 move away from each other. Then the control part 31 controls the conveyor belt 3 3 to move upward until the plate body b1 of the valve plate b contacts the conveyor belt 3 3 again. At this time, there is a gap between the valve plate b and the platform 4. Then the conveyor belt 3 3 moves the polished valve plate b to the conveyor belt 2 21. In this embodiment, a collection box is set on the side of the conveyor belt 2 21 away from the platform 4. According to the design, the conveyor belt 2 21 can also be directly connected to the conveyor belt of the next process, and then the polished valve plate b is moved to the next process.

[0042] The number and pattern of grooves 1 (41) and 2 (62) vary depending on the polished valve plate (b). In this embodiment, both grooves 1 (41) and 2 (62) are through-holes extending along the conveying direction of conveyor belt 11, adapted to accommodate the shaft barrel (b2) extending through both ends. For valve plates (b) with two shaft barrels (b2), both grooves 1 (41) and 2 (62) are required.

[0043] The polishing section 7 includes a vertically arranged telescopic rod 2 71, as well as a rotating motor 1 72, a rotating motor 2 73, a rotating motor 3 74, a brush 1 75, a brush 2 76, a brush 3 77, and a horizontally retractable telescopic rod 3 78. The rotating motors 1 72 and 2 73 are both mounted on the telescopic rod 2 71. The brush 1 75 is fixed to the rotating shaft of the rotating motor 1 72, which extends horizontally. The brush 2 76 is fixed to the rotating shaft of the rotating motor 2 73, and is positioned below the brush 1 75. The axis of the rotating shaft of the rotating motor 2 73 extends vertically. The rotating motor 3 74 is fixed to the telescopic rod 2 71 via the telescopic rod 3 78. The brush 3 77 is fixed to the rotating shaft of the rotating motor 3 74, and the rotating shafts of the rotating motor 3 74 and the rotating shafts of the rotating motor 1 72 are parallel to each other. The brush 3 77 is positioned below the brush 2 76. The second telescopic rod 71 controls the height of the first brush 75 and the second brush 76 , making it easier for the valve plate b to move between the platform 4 and the pressing part 6 , and also easier for the valve plate b to move out from between the platform 4 and the pressing part 6 . The height of platform 4 is lower than conveyor belt 11 and conveyor belt 2 21. A push rod 1 79 extending toward platform 4 is provided between gap 12. A brush 4 791 is provided at one end of push rod 1 79 facing platform 4. The minimum distance between the two limit blocks 1 91 is greater than the diameter of brush 4 791. The height of brush 4 791 is lower than conveyor belt 11. A push rod 2 710 extending toward platform 4 is provided in gap 22. A brush 5 7101 is provided at one end of push rod 2 710 facing platform 4. The minimum distance between the two limit blocks 2 101 is greater than the diameter of brush 5 7101. The height of brush 5 7101 is lower than conveyor belt 2 21. The axes of push rod 1 79 and push rod 2 710 coincide. The cross-sections of brush 4 791 and brush 5 7101 along the axis of push rod 1 79 are both T-shaped.

[0044] During grinding, telescopic rod 2 (71) extends downward, allowing brush 1 (75) and brush 2 (76) to contact the edge of the end face and the outer edge of valve plate (b), respectively. Telescopic rod 3 (78) controls the movement of brush 3 (77), positioning brush 3 (77) and brush 1 (75) at opposite ends of valve plate (b). As grinding unit 7 passes through shaft barrel (b2), brushes 1 (75) and brush 3 (77) deform, causing brushes 1 (75), 2 (76), and 3 (77) to conform to the outer wall of shaft barrel (b2). Push rods 1 (79) and 2 (710) allow brushes 4 (791) and 5 (7101) to extend into shaft barrel (b2), grinding the inner wall and the opening of shaft barrel (b2), improving the grinding effect. Brushes 4 (791) and 5 (7101) exit shaft barrel (b2) as grinding unit 7 passes, facilitating the passage of brushes 1 (75), 2 (76), and 3 (77).

[0045] The telescopic rod 2 71 is fixed on the fixed part 81, and two sets of grinding parts 7 are fixed on the fixed part 81. The two grinding parts 7 are rotationally symmetrical along the center line of the fixed part 81. This makes the grinding parts 7 move stably. Figure 3As shown, this embodiment includes a support ring 82 that mounts the fixing portion 81 above the platform 4, a plane bearing 83 arranged between the support ring 82 and the fixing portion 81, support feet 84 arranged at both ends of the support ring 82, and a drive motor 85 arranged on the support ring 82. The inner wall of the fixing portion 81 is provided with teeth, and the rotating shaft of the drive motor 85 is provided with a gear 851 that meshes with the teeth.

[0046] A stopper block 3a1 is installed between conveyor belt 11 and conveyor belt 33. A movable member 3a3 is installed on the side of the stopper block 3a1, enabling it to move horizontally, perpendicular to conveyor belt 11. Two stopper blocks 3a1 are provided, mirrored in configuration. Arc surfaces 3a2 are located on opposing faces of the two stopper blocks 3a1. Each arc surface 3a2 is less than or equal to 1 / 4 of a circle and faces away from platform 4. The stopper block 3a1 blocks the valve plate b. When conveyor belt 11 stops, it prevents the valve plate b from moving toward platform 4 due to inertia, ensuring smooth polishing. The arc surfaces 3a2 effectively intercept the valve plate b.

[0047] The surface of the platform 4 facing the pressing portion 6 and the surface of the pressing portion 6 facing the platform 4 are both provided with an anti-slip layer with a wavy pattern. In this embodiment, the anti-slip layer is made of rubber to prevent the valve plate B from shifting during the grinding process.

[0048] The width between the two conveyor belts 11 is consistent with the width between the two conveyor belts 21, and the width between the two conveyor belts 3 is greater than the width between the two conveyor belts 11. This ensures that the valve plates b on the conveyor belts 11 and 21 move in a straight line. The width between the two conveyor belts 3 ensures the width of the flat belt, ensuring the fixing effect of the platform 4 and the pressing part 6.

[0049] Compared with the prior art, this embodiment has a better clamping effect, prevents the valve body from moving during grinding, and achieves a better grinding effect. Compared with the prior art, this embodiment requires less manual intervention, and grinding and placement can be performed simultaneously, which increases grinding efficiency and safety.

[0050] The present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art can implement the present invention in various other specific embodiments based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention fall within the scope of protection of the present invention.

Claims

1. A butterfly valve plate grinding device, comprising a conveyor belt 1, a conveyor belt 2 and a conveyor belt 3 with the same conveying direction, the conveyor belt 1 has two pieces and the two conveyor belts 1 are parallel to each other, there is a gap 1 between the two conveyor belts 1, the conveyor belt 2 has two pieces and the two conveyor belts 2 are parallel to each other, there is a gap 2 between the two conveyor belts 2, a platform is provided between the conveyor belt 1 and the conveyor belt 2, the conveyor belt 3 has two pieces and is arranged on both sides of the platform, the conveyor belt 3 is provided with a control member for controlling the movement of the conveyor belt 3 in the vertical direction, a sensor is provided between the conveyor belt 1 and the conveyor belt 3, a pressing part is provided above the platform, a telescopic rod 1 for controlling the movement of the pressing part in the vertical direction is provided on the pressing part, a groove 1 and a groove 2 are respectively provided on the opposite surfaces of the platform and the pressing part, the groove 1 and the groove 2 have the same shape and are arranged opposite to each other, a grinding part is provided at the outer edge of the platform, and a fixing part for driving the grinding part to rotate along the center line of the platform is provided on the grinding part.

2. A butterfly valve plate grinding device according to claim 1, characterized in that: The platform is provided with a limit block 1 and a limit block 2 on both sides close to conveyor belt 1 and conveyor belt 2 respectively. The limit block 1 is provided with a movable part 1 for controlling the limit block 1 to move in a horizontal direction perpendicular to the conveying direction of conveyor belt 1. The limit block 2 is provided with a movable part 2 for controlling the limit block 2 to move in a horizontal direction perpendicular to the conveying direction of conveyor belt 2. The limit block 1 has two pieces, and the two limit blocks 1 have opposite surfaces provided with an arc surface 1 facing the platform. The limit block 2 has two pieces, and the two limit blocks 2 have opposite surfaces provided with an arc surface 2 facing the platform. The arc surface 1 and the arc surface 2 are both arcs smaller than 1 / 4.

3. A butterfly valve plate grinding device according to claim 2, characterized in that: The polishing part includes two vertically arranged telescopic rods, one rotating motor, two rotating motors, one brush and two brushes. The one rotating motor and the two rotating motors are both arranged on the two telescopic rods. The one brush is fixed to the rotating shaft of the one rotating motor, and the rotating shaft of the one rotating motor extends in the horizontal direction. The two brushes are fixed to the rotating shaft of the two rotating motors, and the two brushes are arranged below the one brush, and the rotating shaft of the two rotating motors extends in the vertical direction.

4. A butterfly valve plate grinding device according to claim 3, characterized in that: The polishing part also includes a rotating motor three, a brush three and a horizontally retractable telescopic rod three, the rotating motor three is fixed to the telescopic rod two through the telescopic rod three, the brush three is fixed to the rotating shaft of the rotating motor three, the rotating shaft of the rotating motor three is parallel to the rotating shaft of the rotating motor one, and the brush three is arranged below the brush two.

5. A butterfly valve plate grinding device according to claim 4, characterized in that: The height of the platform is lower than conveyor belt 1 and conveyor belt 2, a push rod 1 extending toward the platform is provided in the gap 1, a brush 4 is provided at one end of the push rod 1 facing the platform, the minimum distance between the two limit blocks 1 is greater than the diameter of the brush 4, the height of the brush 4 is lower than conveyor belt 1, a push rod 2 extending toward the platform is provided in the gap 2, a brush 5 is provided at one end of the push rod 2 facing the platform, the minimum distance between the two limit blocks 2 is greater than the diameter of the brush 5, the height of the brush 5 is lower than conveyor belt 2, the axes of the push rod 1 and the push rod 2 coincide, and the cross-sections of the brush 4 and the brush 5 along the axis of the push rod 1 are both T-shaped.

6. A butterfly valve plate grinding device according to claim 5, characterized in that: The fixing part is annular and sleeved outside the telescopic rod 1, the grinding part is fixed on the fixing part through the telescopic rod 2, two groups of grinding parts are fixed on the fixing part, and the two grinding parts are rotationally symmetrical along the center line of the fixing part.

7. A butterfly valve plate grinding device according to claim 6, characterized in that: A limit block three is arranged between the conveyor belt one and the conveyor belt three, and a moving part three is arranged on the side of the limit block three for moving the limit block three along a horizontal direction perpendicular to the conveyor belt one.

8. A butterfly valve plate grinding device according to claim 7, characterized in that: There are two limit blocks three and they are mirror-imaged. Arc surfaces three are arranged on opposite surfaces of the two limit blocks three. The arc surfaces three are all arcs less than or equal to 1 / 4 and the arc surfaces three face away from the platform.

9. A butterfly valve plate grinding device according to claim 6, 7 or 8, characterized in that: The surface of the platform facing the pressing part and the surface of the pressing part facing the platform are both provided with anti-skid layers, and the anti-skid layers are provided with wavy patterns.

10. A butterfly valve plate grinding device according to claim 9, characterized in that: The width between the two conveyor belts one is consistent with the width between the two conveyor belts two, and the width between the two conveyor belts three is greater than the width between the two conveyor belts one.

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