A polishing and grinding device for circular valve plate

Abstract

The application discloses a kind of circular valve piece polishing grinding device, including outer cylinder, polishing cylinder, the inner wall of polishing cylinder is provided with the limiting slot of circumferential distribution, and the first polishing layer is arranged between the inner wall of polishing cylinder and the adjacent two limiting slots, and the protrusion of circumferential distribution is arranged on polishing piece, and the protrusion is slidably inserted with limiting slot, and polishing piece is placed in polishing cylinder and is spaced apart from the valve piece to be polished, and the elastic downward mechanism of entering into polishing cylinder is installed on outer cylinder cover, and the lower end of polishing cylinder is fixedly connected with the bottom surface of outer cylinder by rolling limiting mechanism;The periphery of valve piece is polished using the first polishing layer on the inner wall of polishing cylinder, and the upper and lower surfaces of valve piece are polished by polishing piece, to realize single polishing of valve piece, improve production efficiency, reduce production cost, the setting of polishing piece makes the gap between the periphery of adjacent two valve pieces, facilitate to collect polishing debris, avoid the risk of scratch of valve piece, ensure the product quality of valve piece.

Description

Technical Field

[0001] This invention relates to the field of valve plate processing technology, and in particular to a polishing and grinding device for circular valve plates. Background Technology

[0002] A valve disc is a device that controls the passage of liquid to reduce its pressure or change its flow rate and direction. Valve discs require a strong sealing effect. They are manufactured through a high-pressure stamping process, resulting in burrs around the finished product. These burrs affect the sealing effect, necessitating polishing to remove them. Our previous patent application, CN201811073877.8, disclosed a polishing device for circular valve discs. To achieve the ability to grind the radius (R) of circular valve discs, we have improved upon this solution. For example, our patent application CN202111208105.2 discloses a grinding device for the cut surface of a circular valve disc. This device uses a lower support assembly and an upper pressure assembly to stack and press the valve discs in place. The rotating ring plate on the rotating disk, combined with a slope structure, causes the circular valve disc to reciprocate and tilt up and down, thereby simultaneously removing burrs from the cut surface of the circular valve disc. While grinding the radius (R) of the cut surface improves the fatigue resistance and service life of circular valve plates, both methods can only grind the outer cut surface of the valve plate. After each grinding, the tongue spring position on the valve plate also needs to be polished, which undoubtedly increases the number of process steps, reduces production efficiency, and increases production costs. Moreover, the outer cut surface of the valve plate is in close contact with the grinding layer, making it difficult to remove the grinding debris. This debris can easily scratch the valve plate and affect the product quality. Therefore, this application proposes a circular valve plate polishing and grinding device to solve the above-mentioned technical problems. Summary of the Invention

[0003] The main objective of this invention is to provide a circular valve plate polishing and grinding device, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a circular valve plate polishing and grinding device, comprising an outer cylinder, a rotating shaft driven by a motor located at the center of the outer cylinder, four grinding cylinders symmetrically arranged around the rotating shaft, the grinding cylinders being connected to the rotating shaft via a transmission mechanism, an outer cylinder cover at the port of the outer cylinder, a circumferentially distributed limiting groove on the inner wall of the grinding cylinder, and a first grinding layer between two adjacent limiting grooves on the inner wall of the grinding cylinder; a plurality of grinding discs, each grinding disc having circumferentially distributed protrusions that slidably engage with the limiting grooves, the grinding discs being placed inside the grinding cylinders and spaced apart from the valve plates to be ground, an elastic pressing mechanism extending into the grinding cylinders mounted on the outer cylinder cover, the lower end of the grinding cylinders being fixedly connected to the bottom surface of the outer cylinder via a rolling limiting mechanism, and a support plate being provided at the bottom of the grinding cylinders, the support plate being connected to the rolling limiting mechanism.

[0005] Preferably, the rolling limiting mechanism includes an annular support platform, the upper end face of which is provided with an annular groove, an annular plate is provided in the annular groove, the upper end face of the annular plate is fixedly connected to the lower end face of the grinding cylinder, the lower end face of the annular plate is provided with a circular groove, a plurality of balls are provided in the circular groove, the balls protrude from the lower end face of the annular plate, and the balls are supported and connected to the lower end face of the annular groove.

[0006] Preferably, the elastic pressing mechanism includes a lower pressing plate, an upper pressing plate, and a screw. The screw is movably connected to the upper pressing plate, and the upper pressing plate and the lower pressing plate are connected by a spring. The screw is movably connected to the outer cylinder cover, and a handwheel is detachably connected to the screw.

[0007] Preferably, the top surface of the support plate and the bottom surface of the lower pressure plate are both rotatably connected to a turntable.

[0008] Preferably, the polishing disc includes a substrate disk, and a second polishing layer is provided on both the upper and lower surfaces of the substrate disk. The radius of the second polishing layer is smaller than the radius of the first polishing layer, and the protrusion is provided around the perimeter of the substrate disk.

[0009] Preferably, the second polishing layer has a plurality of circumferentially distributed arc-shaped gaps.

[0010] Preferably, the bottom of the outer cylinder is provided with an equipment cavity, the motor is located in the equipment cavity, the middle of the outer cylinder cover is provided with a bushing, and the rotating shaft is movably connected to the bushing.

[0011] Preferably, the outer side of the grinding cylinder is provided with a plurality of driven gears distributed along the axial direction, and a master gear that meshes with the driven gears is fixedly connected to the rotating shaft.

[0012] Compared with traditional technologies, the beneficial effects of this invention are as follows: This invention uses a motor to drive four grinding cylinders to rotate, which in turn drives the grinding discs to rotate. The first grinding layer on the inner wall of the grinding cylinder is used to grind the outer surface of the valve plate, and the grinding discs are used to grind and polish the upper and lower surfaces of the valve plate. This achieves single-pass grinding of the valve plate, improving production efficiency and reducing production costs. Furthermore, the arrangement of the grinding discs leaves a gap between the outer surfaces of two adjacent valve plates, which facilitates the collection of grinding debris, avoids the risk of scratching the valve plate, and ensures the product quality of the valve plate. Attached Figure Description

[0013] Figure 1 This is a side sectional view of the overall structure of the present invention;

[0014] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0015] Figure 3 This is a schematic cross-sectional view of the grinding cylinder of the present invention;

[0016] Figure 4 This is a schematic diagram of the grinding disc of the present invention.

[0017] Figure 5 This is a side view of the grinding disc of the present invention;

[0018] Figure 6 This is a schematic diagram of the elastic pressing mechanism of the present invention;

[0019] Figure 7 This is a schematic diagram of the rolling limiting mechanism of the present invention.

[0020] In the diagram: 1. Outer cylinder; 2. Motor; 3. Rotating shaft; 4. Grinding cylinder; 5. Outer cylinder cover; 6. Equipment cavity; 7. Bushing; 8. Driven gear; 9. Main gear; 10. Limiting groove; 11. First grinding layer; 12. Valve plate; 13. Grinding disc; 131. Base plate; 132. Second grinding layer; 133. Arc-shaped gap; 14. Elastic pressing mechanism; 141. Lower pressing plate; 142. Upper pressing plate; 143. Screw; 144. Spring; 145. Handwheel; 15. Rolling limiting mechanism; 151. Annular support platform; 152. Annular groove; 153. Annular plate; 154. Circular groove; 155. Ball bearing; 16. Support plate; 17. Protrusion; 18. Turntable. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figure 1-7As shown, a circular valve plate polishing and grinding device includes an outer cylinder 1. A rotating shaft 3 driven by a motor 2 is located at the center of the outer cylinder 1. Four grinding cylinders 4 are symmetrically arranged around the rotating shaft 3. The grinding cylinders 4 are connected to the rotating shaft 3 via a transmission mechanism. An outer cylinder cover 5 is provided at the end of the outer cylinder 1. Specifically, an equipment cavity 6 is provided at the bottom of the outer cylinder 1, and the motor 2 is located inside the equipment cavity 6. A bushing 7 is provided in the middle of the outer cylinder cover 5. The rotating shaft 3 is movably connected to the bushing 7. The equipment cavity 6 facilitates maintenance of the motor 2 and heat dissipation. The bushing 7 facilitates the separation of the outer cylinder cover 5 from the rotating shaft 3 and also limits the upper part of the rotating shaft 3. Several driven gears 8 are arranged axially on the outside of the grinding cylinders 4. A master gear 9, meshing with the driven gears 8, is fixedly connected to the rotating shaft 3. Rotation of the rotating shaft 3 drives the four grinding cylinders 4 to rotate simultaneously, ensuring the smooth operation of the grinding cylinders 4. To ensure smooth rotation, the inner wall of the grinding cylinder 4 is provided with circumferentially distributed limiting grooves 10, and a first grinding layer 11 is provided between two adjacent limiting grooves 10 on the inner wall of the grinding cylinder 4. The first grinding layer 11 is used to grind the outer circumferential cut surface of the valve plate 12. The valve plate 12 is placed inside the grinding cylinder 4, and several grinding discs 13 are placed inside the grinding cylinder 4. The grinding discs 13 are spaced apart from the valve plate 12 to be ground. The grinding discs 13 are provided with circumferentially distributed protrusions 17, which are slidably inserted into the limiting grooves 10. When the grinding cylinder 4 rotates, it synchronously drives the grinding discs 13 to rotate, thereby grinding the surface of the valve plate 12. An elastic pressing mechanism 14 that extends into the grinding cylinder 4 is installed on the outer cylinder cover 5. The lower end of the grinding cylinder 4 is fixedly connected to the bottom surface of the outer cylinder 1 through a rolling limiting mechanism 15. A support plate 16 is provided at the bottom of the grinding cylinder 4, and the support plate 16 is connected to the rolling limiting mechanism 15.

[0023] The rolling limiting mechanism 15 includes an annular support platform 151. The upper end face of the annular support platform 151 is provided with an annular groove 152. An annular plate 153 is provided in the annular groove 152. The upper end face of the annular plate 153 is fixedly connected to the lower end face of the grinding cylinder 4. The lower end face of the annular plate 153 is provided with a circular groove 154. A plurality of balls 155 are provided in the circular groove 154. The balls 155 protrude from the lower end face of the annular plate 153. The balls 155 are supported and connected to the lower end face of the annular groove 152, which provides radial limiting for the grinding cylinder 4 and circumferential rolling support for the bottom of the grinding cylinder 4, so as to facilitate the rotation of the grinding cylinder 4.

[0024] The elastic pressing mechanism 14 includes a lower pressing plate 141, an upper pressing plate 142, and a screw 143. The screw 143 is movably connected to the upper pressing plate 142, and the upper pressing plate 142 and the lower pressing plate 141 are connected by a spring 144. The screw 143 is movably connected to the outer cylinder cover 5, and a handwheel 145 is detachably connected to the screw 143. In this example, the lower pressing plate 141 limits the uppermost grinding disc 13 through the spring 144, ensuring that the valve plate 12 has a certain tightness during the grinding process. During the rotation of the grinding cylinder 4 and the grinding disc 13... In this process, the valve plate 12 tends to rotate with the grinding disc 13, which can lead to grinding failure on the surface of the valve plate 12. Therefore, in this embodiment, the motor 2 is configured as a forward and reverse motor, so that the grinding cylinder 4 rotates in both directions during operation. This utilizes inertia to allow the grinding disc 13 and the valve plate 12 to rotate in opposite directions, thus achieving grinding on the surface of the valve plate 12. At the same time, the elastic pressing mechanism 14 does not compress the internal grinding disc 13 and valve plate 12. Of course, in actual use, the entire outer cylinder 1 structure can be placed horizontally to reduce the pressure between the valve plates 12. The top surface of the support plate 16 and the bottom surface of the pressing disc 141 are both rotatably connected to the turntable 18 to ensure that the upper and lower parts are in a rotating support state.

[0025] The grinding disc 13 includes a base plate 131. A second grinding layer 132 is provided on both the upper and lower surfaces of the base plate 131. The radius of the second grinding layer 132 is smaller than the radius of the first grinding layer 11. Protrusions 17 are provided around the base plate 131. In the surface punching structure of the valve plate 12, the size of the tongue spring must be smaller than the outer size of the valve plate 12. Therefore, the size of the second grinding layer 132 is designed to be smaller than the size of the first grinding layer 11. After stacking, a gap is left between the valve plate 12 and the base plate 131 to facilitate the collection of grinding waste. At the same time, several circumferentially distributed arc-shaped gaps 133 are provided on the second grinding layer 132 to collect the horizontal grinding debris of the valve plate 12.

[0026] Its working principle is as follows: The motor 2 drives four grinding cylinders 4 to rotate, which in turn drives the grinding discs 13 to rotate. The first grinding layer 11 on the inner wall of the grinding cylinder 4 is used to grind the outer surface of the valve plate 12, and the grinding discs 13 are used to grind and polish the upper and lower surfaces of the valve plate 12. This achieves single grinding of the valve plate 12, which improves production efficiency and reduces production costs. In addition, the setting of the grinding discs 13 leaves a gap between the outer surfaces of two adjacent valve plates 12, which facilitates the collection of grinding debris and avoids the risk of scratching the valve plate 12, thus ensuring the product quality of the valve plate 12.

[0027] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above description is illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circular valve plate polishing and grinding device, comprising an outer cylinder, a rotating shaft driven by a motor located at the center of the outer cylinder, four grinding cylinders symmetrically arranged around the rotating shaft, the grinding cylinders being connected to the rotating shaft via a transmission mechanism, and an outer cylinder cover being provided at the port of the outer cylinder, characterized in that: The inner wall of the grinding cylinder is provided with circumferentially distributed limiting grooves, and a first grinding layer is provided between two adjacent limiting grooves on the inner wall of the grinding cylinder; several grinding discs are provided, each grinding disc having circumferentially distributed protrusions, the protrusions slidingly inserted into the limiting grooves, the grinding discs being placed inside the grinding cylinder and spaced apart from the valve discs to be ground; an elastic pressing mechanism extending into the grinding cylinder is installed on the outer cylinder cover; the lower end of the grinding cylinder is fixedly connected to the bottom surface of the outer cylinder via a rolling limiting mechanism; a support plate is provided at the bottom of the grinding cylinder, the support plate being connected to the rolling limiting mechanism; the rolling limiting mechanism includes an annular support platform, the upper end face of the annular support platform having an annular groove, an annular plate being provided in the annular groove, the upper end face of the annular plate being fixedly connected to the lower end face of the grinding cylinder, and the lower end of the annular plate... The surface is provided with an annular groove, and a number of balls are provided in the annular groove. The balls protrude from the lower end face of the annular plate and are supported and connected to the lower end face of the annular groove. The elastic pressing mechanism includes a lower pressing plate, an upper pressing plate, and a screw. The screw is movably connected to the upper pressing plate, and the upper pressing plate and the lower pressing plate are connected by a spring. The screw is movably connected to the outer cylinder cover, and a handwheel is detachably connected to the screw. The grinding disc includes a base plate, and a second grinding layer is provided on both the upper and lower surfaces of the base plate. The radius of the second grinding layer is smaller than the radius of the first grinding layer. After stacking, a gap is left between the valve plate and the base plate. The protrusion is provided around the base plate. A number of circumferentially distributed arc-shaped gaps are provided on the second grinding layer. The motor is set as a forward and reverse motor, so that the grinding cylinder rotates in both directions when working.

2. The circular valve plate polishing and grinding device according to claim 1, characterized in that: The top surface of the support plate and the bottom surface of the lower pressure plate are both rotatably connected to turntables.

3. The circular valve plate polishing and grinding device according to claim 1, characterized in that: The bottom of the outer cylinder is provided with an equipment cavity, the motor is located in the equipment cavity, and a bushing is provided in the middle of the outer cylinder cover. The rotating shaft is movably connected to the bushing.

4. The circular valve plate polishing and grinding device according to claim 1, characterized in that: The outer side of the grinding cylinder is provided with several driven gears distributed along the axial direction, and a master gear that meshes with the driven gears is fixedly connected to the rotating shaft.

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