Mechanical grinding tool for train operating valve sealing element

Abstract

The utility model discloses a train operating valve sealing element mechanical grinding tool which comprises a grinding astrolabe of a disc structure, gears are arranged on the outer wall of the periphery of the grinding astrolabe, and a rotary valve containing through hole, a sealing plate containing through hole and a grinding fluid injection hole are formed in the grinding astrolabe. During use, the sealing plate is placed in the sealing plate placing through hole, and the grinding star disc is driven to rotate by means of gear transmission, so that the grinding star disc does circular motion around the main shaft of the grinding machine, friction is generated among the rotary valve, the sealing plate and the grinding disc, and automatic mechanical grinding is realized. In the whole process, external force is not applied to the rotary valve and the sealing plate, pressure generated by the gravity action acts on the grinding face of the grinding disc, the gravity action is balanced in magnitude and consistent in direction, and the grinding quality is good. Secondly, the grinding disc with hardness larger than that of the rotary valve and the sealing plate is adopted to separately grind the working faces of the rotary valve and the sealing plate, and the problem that surface scratches are difficult to grind flatly when the sealing plate and the rotary valve are oppositely ground is solved.

Description

Technical Field

[0001] The utility model relates to a grinding tool, in particular to a mechanical grinding tool for a sealing element of a train control valve. Background Art

[0002] The train control valve controls the flow direction of high-pressure air through metal sealing to achieve the conversion between manual position, closed position and open position. The main sealing accessories in the control valve are the rotary valve and the sealing plate. When repairing the rotary valve and the sealing plate, most of them are currently processed by manual grinding. Abrasives are added between two different materials and manually pressurized for grinding. However, manual grinding has problems such as uneven pressure and unstable grinding quality. Secondly, the hardness of the two workpieces being ground is inconsistent. The scratches on the surface of the workpiece with a larger hardness are difficult to grind flat, which makes it easy for high-pressure gas to leak to other passages during use. Summary of the invention

[0003] The purpose of the utility model is to provide a mechanical grinding tool for a train control valve seal, which is used to solve the problem of uneven force and unstable grinding quality when grinding a rotary valve and a sealing plate, and solve the problem that surface scratches are difficult to grind flat when grinding a sealing plate and a rotary valve.

[0004] The technical solution of the utility model is a mechanical grinding tool for a train control valve seal, comprising a grinding star disc with a disc structure, gears are arranged on the outer wall of the grinding star disc, and a rotary valve placement through hole, a sealing plate placement through hole and a grinding liquid injection hole are arranged on the grinding star disc.

[0005] In the aforementioned mechanical grinding tool for a train control valve seal, two rotary valve placement holes and two grinding liquid injection holes are respectively provided, and the two grinding liquid injection holes are provided between the rotary valve placement hole and the sealing plate placement hole.

[0006] In the aforementioned mechanical grinding tooling for a train control valve seal, the line connecting the centers of two rotary valve placement holes and one sealing plate placement hole forms an isosceles triangle; and the two rotary valve placement holes and the two grinding liquid injection holes are symmetrically arranged on both sides of the line connecting the centers of the sealing plate placement holes and the center of the grinding star disk.

[0007] In the aforementioned mechanical grinding tool for a train control valve seal, the top and bottom surfaces of the grinding star plate are both countersunk structures, and the rotary valve placement through hole, the sealing plate placement through hole and the grinding liquid injection hole are all arranged within the countersunk area.

[0008] In the aforementioned mechanical grinding tool for a train control valve seal, the sum of the countersunk hole depths on the top and bottom surfaces is greater than 1 / 2 of the thickness of the grinding star disk.

[0009] Beneficial effects of the utility model: Compared with the prior art, the utility model is provided with a grinding star disk, and a rotary valve placement through hole, a sealing plate placement through hole and a grinding liquid injection hole are provided thereon. The rotary valve to be ground is placed in the rotary valve placement through hole, and the sealing plate is placed in the sealing plate placement through hole. The grinding star disk is driven to rotate by gear transmission, so that the grinding star disk makes a circular motion around the main shaft of the grinder, and friction is generated between the rotary valve, the sealing plate and the grinding disk directly below the grinding star disk, so as to realize automatic mechanical grinding. During the whole process, no external force is applied to the rotary valve and the sealing plate, and only the pressure generated by its own gravity acts on the grinding surface of the grinding disk. The gravity is balanced in size and consistent in direction, and the grinding quality is good. Secondly, a grinding disk with a hardness greater than that of the rotary valve and the sealing plate is used to separately grind the working surfaces of the rotary valve and the sealing plate, which solves the problem that surface scratches are difficult to grind flat when the sealing plate and the rotary valve are ground.

[0010] The tooling of the utility model reduces the grinding time of a set of rotary valves and sealing plates from the original 13 minutes / piece (manual) to the current 10 minutes / piece (mechanical), which improves the work efficiency. In addition, the mechanical grinding has uniform force and stable grinding quality, which reduces the problem of excessive leakage caused by poor grinding, and the one-time pass rate is increased from 58% to 81%. In addition, mechanical grinding reduces labor intensity, and machines replace manpower, saving physical strength. The number of reworks is reduced, the frequency of reworks and grinding is reduced, and the work intensity of employees is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 for Figure 1 Schematic diagram of the side structure.

[0013] Figure numerals: 1-grinding star disk, 2-gear, 3-through hole for placing the rotary valve, 4-through hole for placing the sealing plate, 5-grinding liquid injection hole. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0015] Embodiment of the utility model: a mechanical grinding tool for a train control valve seal, such as Figure 1-2 The grinding star disc 1 includes a disc structure, a gear 2 is arranged on the outer wall of the grinding star disc 1, and a rotary valve placement hole 3, a sealing plate placement hole 4 and a grinding liquid injection hole 5 are arranged on the grinding star disc 1.

[0016] During the use of the utility model, in order to solve the problem of uneven grinding force between the rotary valve and the sealing plate, no external force is applied to the rotary valve and the sealing plate. The rotary valve is placed in the rotary valve placement through hole 3, and the sealing plate is placed in the sealing plate placement through hole 4. Only the pressure generated by the gravity of the rotary valve and the sealing plate acts on the grinding surface. The gravity effect is balanced in size and consistent in direction during the entire grinding process, and the grinding quality is good. Secondly, in order to solve the problem that the sealing plate is difficult to grind flat due to its high hardness, a grinding disc with a harderness than the rotary valve and the sealing plate is used to grind the working surfaces of the rotary valve and the sealing plate separately. The specific measures are as follows:

[0017] Mechanical grinding is used instead of manual grinding. The grinder uses a grinding disc with a hardness greater than that of the rotary valve and the sealing plate (hardness 570HL), and designs and manufactures a grinding star disc 1. After the rotary valve and the sealing plate are placed in the grinding star disc 1, the gear 2 of the grinding star disc 1 meshes with the gear on the main shaft of the grinder. The main shaft of the grinder moves, relying on the transmission of the gear 2 to drive the grinding star disc 1 to rotate, so that the grinding star disc 1 makes a circular motion around the main shaft of the grinder, driving the friction between the rotary valve and the sealing plate and the grinding disc directly below the grinding star disc 1, thereby realizing automatic mechanical grinding.

[0018] The rotary valve placement through hole 3 and the grinding liquid injection hole 5 are respectively provided with two, and the two grinding liquid injection holes 5 are arranged between the rotary valve placement through hole 3 and the sealing plate placement through hole 4, so that the grinding star plate 1 can be reasonably utilized to the maximum extent, and two rotary valves and one sealing plate can be ground once. At the same time, the grinding liquid can be evenly provided to the two rotary valves and one sealing plate through the two grinding liquid injection holes 5, so that the grinding effect is more uniform and stable.

[0019] The lines connecting the centers of the two rotary valve placement holes 3 and the one sealing plate placement hole 4 form an isosceles triangle; and the two rotary valve placement holes 3 and the two grinding liquid injection holes 5 are symmetrically arranged on both sides of the connecting line between the center of the sealing plate placement hole 4 and the center of the grinding star disk 1, thereby realizing a reasonable layout of the rotary valve placement holes 3, the sealing plate placement holes 4 and the grinding liquid injection holes 5, evenly arranging the holes, and ensuring the structural strength of the grinding star disk 1 itself.

[0020] The top and bottom surfaces of the grinding star disk 1 are both countersunk structures. The through hole 3 for the rotary valve, the through hole 4 for the sealing plate, and the grinding liquid injection hole 5 are all arranged within the countersunk area. The countersunk structure can reduce the weight of the grinding star disk 1 itself and its driving force. If the top and bottom surfaces of the grinding star disk 1 are both planar structures, the overall mass of the grinding star disk 1 will be very heavy, and the pressure on the grinding disc will be relatively large, resulting in greater wear of the grinding disc. The middle of the grinding star disk 1 is set as a suspended space to prevent the middle area of ​​the grinding star disk 1 from contacting the grinding disc and causing wear of the grinding disc.

[0021] The sum of the countersunk hole depths of the top and bottom surfaces is greater than 1 / 2 of the thickness of the grinding star plate 1, thereby achieving maximum weight reduction while also ensuring that the supporting strength of the grinding star plate 1 itself meets the use requirements.

Claims

1. A mechanical grinding tool for a train control valve seal, characterized in that: The invention comprises a grinding star disc (1) having a disc structure, wherein a gear (2) is arranged on the outer wall of the grinding star disc (1), and a rotary valve placement through hole (3), a sealing plate placement through hole (4) and a grinding liquid injection hole (5) are arranged on the grinding star disc (1).

2. The mechanical grinding tool for a train control valve seal according to claim 1, characterized in that: The rotary valve placement through hole (3) and the grinding liquid injection hole (5) are respectively provided with two, and the two grinding liquid injection holes (5) are arranged between the rotary valve placement through hole (3) and the sealing plate placement through hole (4).

3. The mechanical grinding tool for a train control valve seal according to claim 2, characterized in that: The connecting line between the centers of the two rotary valve placement through holes (3) and the one sealing plate placement through hole (4) forms an isosceles triangle; and the two rotary valve placement through holes (3) and the two grinding liquid injection holes (5) are symmetrically arranged on both sides of the connecting line between the centers of the sealing plate placement through hole (4) and the centers of the grinding star disk (1).

4. The mechanical grinding tool for a train control valve seal according to claim 1, characterized in that: The top and bottom surfaces of the grinding star disk (1) are both countersunk structures, and the rotary valve placement through hole (3), the sealing plate placement through hole (4) and the grinding liquid injection hole (5) are all arranged within the countersunk area.

5. The mechanical grinding tool for a train control valve seal according to claim 4, characterized in that: The sum of the countersunk hole depths of the top and bottom surfaces is greater than 1 / 2 of the thickness of the grinding star plate (1).

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