KR200260910Y1 - Disc Shock Absorber for Swing Check Valve - Google Patents

Abstract

The present invention relates to a swing check valve mounted between the pipes through which the fluid flows, and more particularly, to smooth the operation of the closed disk to prevent fluid backflow generated when the pump is stopped, thereby reducing the impact load and inherent in the valve. The present invention relates to a disk shock absorber for a swing check valve that can maintain its function stably.

The present invention is provided with a cylindrical body having a screw hole for mounting the nipple on the upper surface, and equipped with an air discharge valve having an air discharge pipe on the nipple, the top outer surface of the cylindrical body can be fitted with a stopper Equipped with a screw hole, forming a plurality of bolt holes, the upper and lower fixing plate formed a plurality of fluid passage holes to be matched with each other, assembled between them, and mounted so as to be movable in the step portion of the lower fixing plate A main body having a movable plate, a plurality of fastening holes coinciding with the bolt holes, and having a cylindrical flange welded to the upper cover; and a sliding movement in contact with the inner circumferential surface of the cylindrical body, It has a piston formed with a through hole, the outer circumferential surface is formed through the pin hole so that the piston pin can be inserted, the upper end is fixed to the piston pin The upper and lower fixing plate and the bottom of the operation bar of a predetermined length penetrating through the center hole of the moving plate is equipped with a connector as a parallel pin, and the operating part welded to the rod connecting the connector; Swing check valve disk including Provide shock absorbers.

Description

Disc Shock Absorber for Swing Check Valve

The present invention relates to a swing check valve mounted between the pipes through which fluid flows, and more particularly, to reduce the impact load by smoothing the operation of the closed disk to prevent the fluid backflow generated when the pump is stopped. In addition, the present invention relates to a disk shock absorber for a swing check valve that can stably maintain the unique function of the valve.

In general, a water treatment facility of a steel mill is provided with a pump for fluid pressure, and a body 101 having a plurality of screw holes 101a as shown in FIGS. 1 and 2 in order to prevent backflow of fluid when the pump in operation is stopped. And a swing check belt 100 having an outer shape with an upper treatment 102 mounted with a plurality of screw members 102a in the middle of the pipe. In addition, the inside of the body 101 of the swing check valve 100 has a rod 105 having one end hinged to the pin 107 and a disk fixed to the other end of the rod 105 as a fixing nut 106. As the 103 is installed, when the pump in operation is stopped, the rod 105 is hinged to the lower side by the back pressure of the fluid in the discharge pipe, and the disc 103 and the seat come into contact with each other so that the fluid flows backward. To prevent it.

However, when the disc 103 of the swing check valve 100 is rapidly closed due to the back pressure of the fluid, the disc 103 hits the seat 104 strongly and generates a large impact load. Since the disk 103 is damaged, there is a problem in that the function of the swing check valve 100 is lost, which is an important factor to block the back flow of the fluid when the pump is stopped.

Therefore, the present invention has been devised to solve the problems described above, and its purpose is to stabilize the opening and closing operation of the disc closed by the back pressure of the fluid generated at the time of pump stop, and to prevent damage by suppressing the impact load upon closing. The present invention aims to provide a disk shock absorber for a swing check valve that can maintain the inherent function of the valve to prevent backflow of fluid.

1 is a perspective view showing a typical swing check valve,

Figure 2 is a longitudinal cross-sectional view showing a typical swing check valve,

Figure 3 is a longitudinal sectional view showing a disk shock absorber for the swing check valve according to the present invention,

Figure 4 is an exploded perspective view showing a disk shock absorber for the swing check valve according to the present invention,

5 is an assembled cross-sectional view showing a disk shock absorber for the swing check valve according to the present invention,

Figure 6 is an external perspective view showing a disk shock absorber for the swing check valve according to the present invention.

<Description of Symbols for Major Parts of Drawings>

1 .... Disc buffer 10 .... Main unit

11 .... cylindrical body 11c, 13a, 14a, 16a .... bolt hole

12 .... air vent valve 13 .... upper fixing plate

13b, 14b, 21a .... Fluid passage hole 13c, 14c, 15a .... Center hole

14d .... step 16 .... flange

20 .... Actuator 21 .... Piston

22 .... piston pin 24 .... operating bar

25 .... End connection 26 .... Parallel pin

Swing check valve 101.

102 .... Top cover 103 .... Disc

In order to achieve the above object, the present invention, in the swing check valve to prevent the back flow of the fluid flowing in the pipe by installing the body with the top cover and the rod mounted with a disk therein to enable the hinge operation. And a cylindrical body having a screw hole for mounting the nipple on the upper surface, an air discharge valve having an air discharge pipe on the nipple, and a screw hole for mounting a cap on the upper outer surface of the cylindrical body. And upper and lower fixing plates formed with a plurality of bolt holes coinciding with the bolt holes of the cylindrical body, and formed with a plurality of fluid passage holes coincident with each other, assembled therebetween, and having a step difference between the lower fixing plates. While having a moving plate mounted to be movable to the part, a plurality of fastening holes coincident with the bolt holes are formed, and welded to the upper cover. A cylindrical body having a cylindrical flange installed vertically to the body; and a piston which is slidably moved in contact with the inner circumferential surface of the cylindrical body, and has a piston having a hole for fluid passage thereon, and a piston pin can be inserted into the outer circumferential surface thereof. The pin hole penetrates, and the upper end is fixed to the piston pin, and a connector is installed as a parallel pin at a lower end of the operation bar having a predetermined length penetrating the center hole of the upper and lower fixing plates and the moving plate, and the connector is connected to the rod. By operating the welded connection portion; characterized in that by providing a disk shock absorber for the swing check valve.

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

3 is a longitudinal sectional view showing a disk shock absorber for the swing check valve according to the present invention, Figure 4 is an exploded perspective view showing a disk shock absorber for the swing check valve according to the present invention, Figure 5 is a swing according to the present invention 6 is an assembled cross-sectional view showing a disk shock absorber for the check valve, Figure 6 is an external perspective view showing a disk shock absorber for the swing check valve according to the present invention.

3 to 6, the disk shock absorber (1) for swing check valve according to the present invention is installed in the middle of the pipe of the water treatment equipment is mounted on the swing check valve 100, the fluid at the stop of the fluid pump By minimizing the impact load of the disk 103 that automatically contacts the sheet 104 to prevent backflow, the inherent function of the valve can be maintained for a long time, such a device 1 is the main body 10 and the operating portion 20 )

That is, the main body portion 10 installed on the upper cover 102 of the fluid flow check valve 100 is provided with a cylindrical cylindrical body 11 of which the upper part is sealed and the lower part is open, such a cylindrical body ( The upper surface of 11) is provided with a drilled screw hole (11a) to mount the nipple (12a), the other side of the air discharge valve 12, one side is connected to the nipple (12a) air discharge during valve development While the air discharge pipe 12b is formed, the upper outer surface of the cylindrical body 11 is equipped with another screw hole 11b for mounting the stopper 17. When the swing check valve 100 is installed in the vertical direction between the pipes in which the fluid flows in the vertical direction, the air discharge valve 12 is replaced with the screw hole 11b on which the stopper 17 is mounted. Can be installed.

In addition, the upper fixing plate 13 mounted on the lower surface of the cylindrical body 11 is a disk-shaped perforated circularly in the center, the outermost coincide with the bolt hole 11c of the cylindrical body 11 screw member Is provided with a plurality of bolt holes 13a through which the inner circumferential side is provided with a plurality of holes 13b for fluid passing therethrough, while being drilled so large that there is no interference during the vertical operation of the operation bar 24 to be described later. The center hole 13c which formed the inclination part in this is provided and comprised.

Further, the lower fixing plate 14, which is provided with the same outer diameter size of the upper fixing plate 13, has another bolt hole 14a coinciding with the bolt holes 11c, 13a and the fluid passage hole 13b. ) And a plurality of fluid passage holes 14b, and the moving plate 15 having a small outer diameter can be sufficiently moved in the center of the upper surface of the lower fixing plate 14 having the center hole 14c having a rounded portion formed on the inner circumferential surface thereof. It has a stepped portion (14d) formed to be recessed to a certain depth and inner diameter size.

In addition, the movable plate 15 is drilled with an inner diameter larger than the outer diameter of the operating bar 24 so as to form a gap in which fluid is moved between the outer circumferential surfaces of the operating bar 24 which is operated up and down, and the rod The cylindrical flange 16 welded to the upper surface of the upper cover 102 of the swing check valve 100 is provided with a central hole 15a having a rounded portion formed on the inner circumferential surface so as to avoid interference of the 24. The fastening hole 16a is formed so as to be assembled with a plurality of screw members in accordance with the bolt holes 11c, 13a, and 14a of the cylindrical body 11 and the upper and lower fixing plates 13 and 14, respectively. Equipped with a plurality.

On the other hand, the operation unit 20 is gradually lowered so as to minimize the impact load of the disk 103 is provided with a piston 21 in contact with the inner peripheral surface of the cylindrical body 11 is installed vertically on the upper side of the upper cover (102) Bar, such a piston 21 forms a hollow space 21b inside the body, and has a plurality of fluid passage holes 21a in the upper surface thereof, the piston pin for fixing the upper end of the operation bar 24 on the outer peripheral surface By forming the pin hole 21c in the transverse direction so that the 22 is inserted, the piston is fitted into the fitting groove 24a of the operation bar 24 in which the upper end is assembled into the lower hole 21d of the piston 21. The pin 22 can be inserted and fixed. In addition, recessing grooves 21e for recessing the snap rings 22a fastened to both ends are formed in the inner circumferential surfaces of both ends of the pin hole 21c to prevent separation of the piston pin 21.

And, the operating bar which is located inside the body 101 by passing through the center hole (13c), (14c), (15a) of the upper, lower fixing plate 13, 14 and the moving plate 15 without interference The lower end of the connector 24 is provided with the connector 25 of the hexahedron as the parallel pin 26, and the split pin 26a is provided at one end to prevent the parallel pin 26 from being separated. The lower surface is welded to the rod 105 which hinges the disk 103.

If the operation of the present invention configured as described above is as follows.

That is, when the pump is initially started and operated, the fluid flows in one direction in the body 101 of the swing check valve 100, so that the disk 103 installed in the body 101 maintains the upward state. , The operation bar 24 mounted on the lower end of the connector 25 welded to the rod 105, which is hinged, is moved upwards, and the fluid of the upper and lower fixing plates 13, 14 and the piston 21 is increased. Since the fluid flows through the through holes 13b, 14b and 21a, the fluid is filled in the inner space of the cylindrical body 11. At this time, since there is air in the inner upper end of the cylindrical body 11 to open the air discharge valve 12 to discharge the internal air to the outside, and then close the air discharge valve 12 again.

When the pump is stopped in this state and the pump is stopped due to a change in operating conditions, when the disk 103 installed in the body 101 is closed to the seat 104 side by the back pressure of the fluid existing in the pipe. As the connector 25 welded to the rod 105, which is hinged, is pulled downward, and the operation bar 24 mounted at the lower end thereof is also pulled to the lower side, it is assembled at the top of the operation bar 24. The piston 21 can be moved downward along the inner circumferential surface of the cylindrical body 11 at the same time downward. At this time, the fluid filled in the cylindrical body 11 between the piston 21 and the upper fixing plate 13 is filled with holes for fluid passing through the upper and lower fixing plates 13 and 14 and the piston 21. As resistance is generated while passing through 13b), (14b) and (21a), the closing operation of the disk 103, which has generated a large impact load as in the prior art, is gradually made toward the sheet 104 and closed. It is possible to prevent the breakage of the disk 103 that occurred during.

On the other hand, the movable plate 15 is installed between the upper, lower fixing plate 13, 14, the rod 105 is a circular motion around the pin 107, and the operation bar (operating with this ( 24 is a gap with the operation bar 24 while moving in the step portion 14d of the lower fixing plate 14 by the amount of movement of the operation bar 24 to the left and right as the movement in the left and right direction while moving in the vertical direction. To create a resistance of the fluid passing through it. That is, it moves together with the operation bar 24 to prevent the loss of fluid that generates resistance while passing.

As described above, according to the present invention, when the pump for the fluid pump in operation is stopped, the cylindrical body 11 operates to close the disc 103 of the swing check valve 100 by the back pressure of the fluid in the discharge-side pipe. As the piston 21 gradually descends due to the resistance of the fluid in the air, the opening and closing operation of the disk 103 can be performed while greatly suppressing the impact load of the disk 103 that strikes the sheet 104. Since it is made gradually, a substantial effect is obtained to prevent the damage of the swing check valve 100 and to stably maintain the inherent function of blocking the fluid backflow.

Claims (1)

In the swing check valve to prevent the back flow of the fluid flowing in the pipe by installing the body 101 with the upper cover 102 and the rod 105 with the disc 103 installed therein so as to be hinged. And an air discharge valve 12 having a cylindrical body 11 having a screw hole 11a on which an nipple 12a can be mounted, and having an air discharge pipe 12b on the nipple 12a. A plurality of bolt holes 13a provided on the upper outer surface of the cylindrical body 11 for mounting a stopper 17 thereon and coincident with the bolt holes 11c of the cylindrical body 11. ) And (14a), and having upper and lower fixing plates (13) and (14) formed with a plurality of fluid passage holes (13b) and (14b) coincident with each other, and assembled therebetween, A fastening hole (1) having a movable plate (15) mounted on the stepped portion (14d) of the fixed plate (14) to coincide with the bolt holes (11c), (13a), and (14a). A plurality of 6a) and having a cylindrical flange 16 welded to the upper cover 102 and vertically installed on the body 101; and on the inner circumferential surface of the cylindrical body 11. A piston 21 which slides in contact with each other and has a fluid passage hole 21a formed on an upper surface thereof, and penetrates through the pin hole 21c to insert a piston pin 22 on an outer circumferential surface thereof. The upper end is fixed to the pin 22 and the predetermined length of the operation bar penetrating the center hole (13c), (14c), (15a) of the upper and lower fixing plates (13), (14) and the moving plate (15) 24) the lower end is equipped with a connector (25) as a parallel pin 26, the operating portion 20 is welded connected to the connector 25 to the rod 105; for the swing check valve Disk buffer.