KR100591269B1 - Valve disc lapping device - Google Patents

Abstract

The present invention relates to an apparatus for polishing a valve disk, and more particularly, to equipment for repairing a disk contact surface damage occurring during disassembly and inspection of a gate valve and a check valve installed in a power plant or industrial plant large pipe structure piping, A valve disc polishing machine employing an electric motor and an air drive method.

In order to achieve the above object, the valve disk polishing machine according to the present invention includes: a base part on which various mechanical parts are placed on a reinforcing plate; A post part fixed to an upper part of the base part and connected to a lapping disc movable in a vertical and horizontal direction to polish the valve disc from the upper part; It is characterized in that it comprises a plate portion fixed to the upper portion of the base and the processing target valve disk is seated on the upper portion and the lapping plate that is adjustable in angle to polish the valve disk from the bottom.

Valve, valve disc, polishing, lapping

Description

Valve disc lapping device

1 is a perspective view showing a valve disk polishing machine according to the present invention.

Figure 2 is an exploded perspective view showing a valve disk polishing machine according to the present invention.

3 is a perspective view showing a base portion of the valve disk polishing machine according to the present invention.

Figure 4 is an exploded perspective view showing a post portion of the valve disk polishing machine according to the present invention.

5 is a perspective view showing a post portion of the valve disk polishing machine according to the present invention.

Fig. 6A is a perspective view showing the lapping plate of the plate portion of the valve disk polishing machine according to the present invention.

6B is a sectional view showing a plate portion of the valve disk polishing machine according to the present invention.

7 is a cross-sectional view illustrating the operation of the valve disk polishing machine according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: base portion 102: base

104: wheel 106: stopper

108: post block 110: post block fixing means

200: post portion 202: post rod

204: carriage 206: arm

208: disk gear box bracket 210: load caching

212: lead screw 214: lead screw handle

216 shaft 218 lapping disc

220: spur gear 222: pinion gear

224: direct connector 226: pinion connector

300: plate portion 302: plate gear box

304: lapping plate 308: crown gear

310: bevel gear 312: hinge

314: angle adjustment lever 316: plate fixed stopper

The present invention relates to an apparatus for polishing a valve disk, and more particularly, to equipment for repairing a disk contact surface damage occurring during disassembly and inspection of a gate valve and a check valve installed in a power plant or industrial plant large pipe structure piping, A valve disc polishing machine employing an electric motor and an air drive method.

In general, piping in power plants or large plant industrial sites is equipped with gate valves or check valves to block and regulate the flow of fluid. The valve has a valve operating means such as a handle and a disk, and has a structure for controlling the fluid by the vertical movement of the disk, the valve disk is very large in size, thickness and shape depending on the use and shape of the pipe. In order for such a valve to operate efficiently, the internal shape of the valve must have an appropriate flow path shape suitable for the trajectory of the flow path, so the flow path shape has a close relationship with the performance of the valve. Discs and seats are the most critical components in determining valve function in such valve structure shapes, and it is important that the disks and seats remain rigid. Therefore, when a disc contact surface occurs during maintenance of the gate valve and the check valve, the disc contact surface should be polished to maintain and reuse the valve so that the disc smoothly and completely adheres to the seat.

In order to grind the disk contact surface as described above, a lapping compound is applied to a lapping surface plate, and the disk is turned in the shape of “8” to polish the contact surface. However, since the valve disk polishing method as described above is made by hand, it requires a skilled maintenance manpower and takes a long time for polishing.

In addition, since the distribution of force is not even because the disk is turned to the attraction force during the polishing operation, there is a problem in that even wear of the disk occurs and uniform contact between the valve disk and the seat is not achieved.

In order to solve the above problems, a fixing device or a valve disk grinder for a valve disk wrapping tool for mounting a valve disk on a fixing device and polishing with an air motor has been proposed, but a general lapping tool fixing device or a valve disk grinder has only one side of the disk. Since the lapping has a problem that takes a lot of time compared to the polishing machine for wrapping both sides at the same time.

In addition, the conventional valve disk grinder is composed of a structure that cannot be polished by varying the height and angle freely according to the size and the grinding portion of the valve disk to be polished, so it is not applicable to valve disks of various sizes and shapes, According to the size or shape of the disk, there is a problem that only a limited portion of the disk should be wrapped.

The present invention is to solve the above-mentioned conventional problems, by driving the lapping operation of the valve disk carried out at the time of disassembly inspection of the valve by means of air motor, etc., not manual work, so that even the skilled personnel can be polished work The purpose is to increase the efficiency by reducing the polishing time.

In addition, by adjusting the angle and distance during polishing, it distributes the force evenly by applying a constant force to the contact surface of the valve disk, thereby minimizing uneven wear and polishing the contact surface of the valve disk uniformly, It aims at improving reliability.

In addition, an object of the present invention is to minimize the time required for the work by simultaneously performing the polishing work on both sides of the disk.

In addition, the lapping disk for performing the disk polishing operation can be replaced according to the size of the valve disk, and the angle of the lapping plate can be adjusted, so that even if the size and shape of the valve disk varies, the purpose is to freely fix the wrapping It is done.

In order to achieve the above object, the valve disk polishing machine according to the present invention includes a base portion on which various mechanical parts are located on a reinforcing plate; A post part fixed to an upper part of the base part and connected to a lapping disc movable in a vertical and horizontal direction to polish the valve disc from the upper part; It is characterized in that it comprises a plate portion fixed to the upper portion of the base and the processing target valve disk is seated on the upper portion and the lapping plate that is adjustable in angle to polish the valve disk from the bottom.

In addition, the valve disk polishing machine is characterized in that the lapping disk can be replaced by a variety of sizes and shapes.

In addition, the valve disk polishing machine is characterized in that it comprises an air motor is connected to the post portion or plate portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a perspective view and an exploded perspective view showing a valve disk polishing machine according to the present invention.

As shown in Figures 1 and 2, the apparatus is largely a base portion 100 for holding various mechanical parts, and a post portion fixed to the upper portion of the base portion 100 and polished one side of the valve disk ( 200) and the valve disc is seated and may be divided into a plate portion 300 for polishing the other side.

The base part 100 includes a rectangular base 102 in which various machine parts are located, wheels 104 installed at four corners of the lower surface of the base 102 to move the valve disk polishing machine, and the wheels ( A stopper 106 positioned outside the 104 and fixing the valve disk polishing machine at a specific position, and a cylindrical post block 108 positioned above the base 102 to enclose the post portion 200 and the It consists of fastening means 110 which secures the post block 108 to the base 102.

The post portion 200 has an elongated cylindrical post rod 202 inserted into the post block 108 and an outer circumferential surface of the post rod 202 while having an inner radius equal to an outer radius of the post rod 202. Wrapping is composed of a carriage 204 for vertically moving up and down in the longitudinal direction, and the height adjusting means fastened to the carriage 204. The height adjusting means includes a lead screw 212 having a thread formed on the outside and a handle 214 bolted to one end of the lead screw 212. In addition, the arm 206 composed of a pair of rods coupled to the carriage 204 extending in the horizontal direction, the disk gear box bracket 208 is coupled to slide in the horizontal direction along the arm 206, The disk gearbox is coupled to the disk gear box bracket 208 and is attached to a hollow cylindrical rod caching 210 orthogonal to the arm 206 and one side of the rod caching 210. The disc gearbox has a gearwheel-shaped spur gear 220, a direct connector 224 protruding from the center portion of the spur gear 220, and a drive shaft engaged with the spur gear 220 side by side. It consists of a small pinion gear 222 of the shape and the pinion connector 226 protruded and fastened to the center portion of the pinion gear 222. In addition, a circular rod-shaped shaft 216 for rotation is inserted into the cylinder of the rod caching 210, and one end of the shaft 212 has a disk-shaped wrapping formed at predetermined intervals along a circumference. The disk 218 is fastened.

The plate part 300 is fixed to the upper portion of the base 102, the front and rear plate plate box box 302 is removed, and the wrapping plate 304 is attached to the upper portion of the plate gear box 302 It is composed of The lapping plate 304 has a hinge 312 is installed on one side of the upper and lower two plates and overlapped, the pair of angle control lever 314 for adjusting the angle of the upper and lower lapping plate 304 is up and down The plate fixing stopper 316 is fastened to each corner of the other side of the two plates and fixes the wrapping plate 304 at a predetermined angle between the pair of angle adjusting levers 314. In addition, the inside of the plate gear box 302, the rotating shaft for rotating the lapping plate 302 is inserted into the center portion and the crown gear 308 is formed so that the pitch surface is horizontal, the crown gear 308 and the drive shaft This vertically engaging small bevel gear 310 is constructed.

3 is a perspective view showing a base of the valve disk polishing machine according to the present invention.

As shown in FIG. 3, the base 102 of the base part 100 is a rectangular reinforcement plate, and the four wheels 104 and the stopper 106 are installed at four corners of the lower part to facilitate movement and fixing. The upper part is trimmed with sandpaper or the like to facilitate the assembly of the post block 108 and the gearbox 302. The stopper 106 is configured to adjust the level by turning the handle, four are located on the outside of the wheel 104, respectively. The post block 108 is a hollow cylindrical shape is firmly fastened to the upper portion of the base 102 by the fixing means 110, the fixing means 110 is preferably made of six fixing bolts.

4 and 5 are exploded perspective and perspective views showing the post portion of the valve disk polishing machine according to the present invention.

As shown in FIGS. 4 and 5, the cylindrical post rod 202 of the post portion 200 is inserted into the post block 108, which is firmly fixed to the upper portion of the base 100, and thus the arm 206. And various components of the post portion 200, such as the lapping disc 218 and the disc gearbox. The carriage 204 which surrounds the outer circumferential surface of the post rod 202 is attached to the elongated cylindrical post rod 202, and the handler 214 of the lead screw 212 which forms a thread that is fastened to the carriage 204. The carriage 204 is moved vertically and vertically along the longitudinal direction of the post rod 202 by using a height adjusting means configured to adjust the height during polishing of the valve disc.

In addition, the disc gear box bracket 208 is coupled to the carriage 204 to be made to slide smoothly along the arm 206 consisting of a pair of rods extending in the horizontal direction to wrap the wrapping disk 218 Makes it easy to move to the center of the part.

In addition, the rod caching 210 which is fastened to the disc gear box bracket 208 and fixed in parallel with the post rod 202 has a bearing installed therein, and the shaft 216 inserted into the rod caching 210. Does not strain the rotation of the valve disc. A fastening piece 228 is formed at one end of the shaft 216, and the fastening piece 228 of the shaft 216 is fastened to a fastening groove 230 formed at the center of the disc-shaped lapping disc 218. . The wrapping disk 218 is replaceable according to the size and shape of the valve disk, a plurality of holes are formed at predetermined intervals along the circumference, the hole serves to reduce the weight of the wrapping disk 218.

In addition, the disk gear box is fastened to one side of the disk gear box bracket 208 is composed of a spur gear 220 and a small pinion gear 222 parallel to the drive shaft, the spur gear 220 and the pinion gear 222 A drive, such as an air motor, is connected to the direct connector 224 or pinion connector 226 protruding at each central portion of the valve disk to polish the valve disc.

Figure 6a is a perspective view showing the lapping plate of the plate portion of the valve disk polishing machine according to the present invention, Figure 6b is a sectional view showing the plate portion.

6A and 6B, the plate gearbox 302 of the hexahedron together with the post block 108 is firmly installed on the upper portion of the base 100. Inside the plate gearbox 302 is a crown gear 308 with a rotating shaft for rotating the wrapping plate 302 is inserted into the center portion, and a small bevel gear 310 in which the crown gear 308 and the drive shaft are vertically engaged. ) Is attached, and the air motor 306 for driving may be connected to the bevel gear 310. Since the lapping plate 304 is formed in a form in which a hinge 312 is installed on one side of the upper and lower two plates and is superimposed, the hinge by the angle adjusting lever 314 fastened to each corner of the other side of the two plates ( An angle can be adjusted with respect to the axis of 312, and a predetermined angle formed between the angle adjusting levers 314 is fixed by a plate fixing stopper 316 fastened to the upper and lower plates.

In addition, when lapping the check valve disk horizontal contact surface may be used by attaching a shelf interlocking chuck 318 on top of the lapping plate 302.

7 is a cross-sectional view illustrating the operation of the valve disk polishing machine according to the present invention.

As shown in FIG. 7, when lapping the valve disk, the valve disk polishing machine is positioned at an appropriate position, and then the stopper 106 of the base portion 100 is operated to prevent the valve disk polishing machine from moving. At this time, the valve disk polishing machine is horizontally adjusted by using the stopper 106 to be level with the bottom. When the horizontal adjustment of the valve disk polishing machine is finished, the valve disk to be wrapped on the wrapping plate 304 of the plate portion 300 is seated and firmly fixed with a fixed stopper. When the valve disc is a horizontal check valve disc, a shelf interlock chuck 318 may be attached to fix the valve disc to the shelf interlock chuck 318. In addition, when the valve disk is a non-horizontal wedge type disk (Wedge Type Disk) by using the angle control lever 314 to adjust the upper portion of the valve disk to be horizontal and the lapping plate 304 with a plate fixing stopper 316 Fix it.

When the valve disc is fixed to the lapping plate 304, the lapping disc 218 of the post part 200 is placed on the valve disc, and the top and bottom of the carriage 204 are moved using the handle 214 of the lead screw 212. Adjust and move the disc gear box bracket 208 fastened to the arm 206 to adjust the left and right to the center of the valve disk to be polished. When the vertical and horizontal adjustment as described above is made, the fastening piece 228 of the shaft 216 is inserted into the fastening groove 230 of the lapping disk 218 between the lapping plate 304 and the lapping disk 218. Secure the valve disk without movement.

When the lapping plate 304 and the lapping disk 218 are fixed to a position where the valve disk can be polished, lapping is simultaneously performed on the upper and lower portions of the valve disk. When the bevel gear 310 inside the plate gearbox 302 is driven by an air motor 306 attached to the side of the plate gearbox 302, the lower portion of the valve disc is engaged with the bevel gear 310. The gear 308 is driven to wrap as the wrapping plate 304 rotates. The reduction ratio of the crown gear 308 and the bevel gear 310 is 5: 1 and a voltage regulator can be added as needed to adjust the revolution per minute (RPM) of the motor.

In addition, when the spur gear 220 is driven by an air motor, the upper portion of the valve disc is wrapped while the wrapping disc 218 rotates by the rotation of the shaft 216 inside the post rod 210. In the first grinding operation, the air motor may be connected to the direct connector 224 for driving the spur gear 220 so that the lapping can be performed quickly. It connects to pinion connector 224 which drives 222 to polish the valve disc. That is, in the case of finishing polishing requiring more sophisticated work, when the pinion gear 222 is driven, the spur gear 220 engaged with the pinion gear 222 is driven to rotate the shaft 216 and the lapping disc 218 while lapping is performed. It can be used and reduced to 5: 1 of the drive RPM.

In addition, the wrapping disk 218 can be replaced and used according to the size and shape of the valve disk. If the size of the valve disk is large, shaking may occur during the wrapping operation. Therefore, the motor is connected to the pinion connector 224 to reduce the speed. When the size of the valve disc is relatively small, the valve disc may be polished quickly by directly connecting the motor to the direct connector 222.

In the lapping operation, it is preferable that the rotation direction of the lapping disc and the rotation direction of the lapping plate are opposite to each other. As the driving means, an electric motor and an air driving method may be adopted, but may be applied to other driving means, and the reduction ratio may also be changed depending on the use.

The present invention is not limited to the above-described embodiments, and technical ideas that can be modified and converted by those skilled in the art to which the present invention pertains without departing from the gist of the present invention also belong to the following claims. Should be seen.

According to the present invention having the above-described configuration, the present invention is the effect that can be polished without skilled personnel by wrapping the valve disc to be carried out at the time of disassembly inspection of the valve by driving with an air motor, not manual work, etc. There is.

In addition, the present invention by applying a constant force to the contact surface of the valve disk by adjusting the angle and distance according to the shape of the disk to distribute the force evenly mechanically, to minimize the uneven wear generated during polishing and to evenly wrap the contact surface of the valve disk Therefore, there is an effect to improve the reliability of the maintenance quality.

In addition, the present invention by performing the polishing operation on both sides of the disk at the same time, there is an effect of minimizing the time taken to work and increase the polishing efficiency.

In addition, in the present invention, the lapping disc can be replaced according to the size of the valve disc, and the angle of the lapping plate can be adjusted to mount the valve disc having various shapes and sizes. There is no effect.                     

In addition, the present invention is provided with a wheel and a stopper at the bottom of the device has the effect of convenient movement and fixing in any place.

In addition, the present invention can connect the drive means such as a motor to both the spur gear and the pinion gear of the disk gear box, there is an effect that can be selected and polished as needed for fast lapping and sophisticated lapping.

Claims (8)

delete A valve disc polishing machine for repairing contact surface damage of a valve disc; A base plate 102 having a rectangular plate, a hollow cylindrical post block 108 positioned above the base 102, and fixing means 110 for fixing the post block 108 to the base 102. A base part 100 including various mechanical parts located therein; A post part 200 fixed to an upper part of the base part 100 and connected to a lapping disc 218 movable in a vertical and horizontal direction to polish the valve disc from the upper part; It is fixed to the upper portion of the base portion 100, the processing object valve disk is seated on the upper and the angle is adjustable lapping plate 304 is installed is characterized in that it comprises a plate portion 300 for polishing the valve disk from the bottom Valve disc polishing machine. The method of claim 2, wherein the post portion 200 A long cylindrical post rod 202 inserted into the post block 108, a carriage 204 which wraps the outer circumferential surface of the post rod 202 and moves vertically and vertically, and is fastened to the carriage 204. Height adjusting means, an arm 206 coupled to the carriage 204 and extending in a horizontal direction, a disc gear box bracket 208 sliding along the arm 206, and the disc gear box bracket 208. A hollow cylindrical rod caching 210 coupled to the arm 206 and orthogonal to the arm 206, a disc gearbox coupled to one side of the rod caching 210, and a circular insert inserted into the rod caching 210. And a rod-shaped shaft (216) and a disk-shaped wrapping disk (218) fastened to one end of the shaft (216). According to claim 3, wherein the disc gearbox is a gearwheel-shaped spur gear 220, a direct connector 224 protruding from the center portion of the spur gear 220, and the drive shaft is parallel to the spur gear 220 The small pinion gear 226 meshes with the pin, the pinion connector 226 protruding from the center portion of the pinion gear 226, and the air motor is further connected to the direct connector 224 or the pinion connector 226. Valve disk polishing machine comprising a. The method of claim 2, wherein the plate portion 300 The plate gear box 302 is fixed to the upper portion of the base 102 and the gear is installed therein, and coupled to the upper portion of the plate gear box 302, the hinge is installed on one side of the upper and lower two plates in a stacked form The valve disc polishing machine comprising a wrapping plate (304) made of, and an angle adjusting lever (314) and a fixed stopper (316) coupled to the other side of the wrapping plate (304). The crown gear 308 of claim 5, wherein the rotating shaft of the lapping plate 304 is inserted in the center of the plate gearbox 302, and the bevel in which the crown gear 308 and the driving shaft are vertically engaged. The valve disk grinding machine, characterized in that further comprises an air motor connected to the gear 310 and the bevel gear (310). 7. The valve disc polishing machine according to any one of claims 2 to 6, wherein the wrapping disc (218) has a variety of sizes and shapes and can be replaced. 7. The valve disc polishing machine according to any one of claims 2 to 6, further comprising a lathe interlocking chuck (318) attached to an upper portion of the lapping plate (304).

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