KR200220495Y1 - butterfly valve having a valve seat with back up ring - Google Patents

Abstract

This proposal installs a back-up ring made of phenolic resin in the valve seat that blocks or opens the flow path by contacting or separating the valve disc outer end of the butterfly valve to prevent deformation and damage of the valve seat. In order to increase the sealing effect of the valve and to extend the service life of the valve, a disk connected to the stem 2 is provided by installing a ring-shaped valve seat 5 on the inner circumferential surface of the valve body 1. In the butterfly valve (A) in which the outer end of the disk (3) is selectively brought into close contact with the inner surface of the valve seat (5) while 3) is rotated, the reinforcing ring made of a phenol resin material inside the valve seat (5). (6) is a butterfly valve having a valve seat provided with a reinforcing ring therein, characterized in that it is provided internally.

Description

Butterfly valve having a valve seat with back up ring}

The present invention relates to a butterfly valve having a valve seat having a reinforcing ring installed therein, and more particularly, to a phenol inside a valve seat for contacting or separating the valve disc outer end of the butterfly valve to block or open the flow path. Reinforcement ring made of resin

Built-in back up ring prevents valve seat deformation and damage

In addition to increasing the sealing effect, the service life of the valve can be extended.

In general, in order to block or maintain the flow of various fluids such as water, oil or seawater for industrial plants, a plurality of butterfly valves are installed, which are lighter than general valves and have a desired advantage of opening and closing operation. These used butterfly valves are provided with a valve seat made of elastic rubber between the valve body and the disk to selectively close the outer surface of the disk on the inner surface of the valve seat to selectively block the flow path. In this case, the valve seat of the conventional butterfly valve is applied to the inner circumferential surface of the valve seat 05 using only a single valve seat 05 made of an elastic rubber material, as shown in FIG. The disk 3 is rotated in accordance with the valve operation so that the outer surface of the disk 3 is closely or separated. The flow of the flow path is maintained in a blocked state or in an open state by the bar. In the conventional butterfly valve to which the valve seat 05 having a single configuration is applied as described above, the valve outer surface of the disk seat is repeatedly formed according to the valve operation. In the process of repeating separation and closeness with the inner surface of 05), the valve seat (05) causes deformation of the torsion, etc. and tries to block the flow of the high pressure or high temperature fluid. Strong pressure is applied between the inner surfaces, i.e. the contact surfaces, which causes the valve seat 05 to be partially pushed back, resulting in poor sealing (watertightness) and thus preventing the flow of the flow path completely. There was a problem such as greatly shortening the overall service life of the butterfly valve.

Therefore, the purpose of this paper is to solve the problems of the conventional butterfly valve applying the valve seat made of only elastic rubber as described above, reinforcing ring of phenol resin inside the valve seat made of elastic rubber (back) The built-in up ring prevents the valve seat from deforming in spite of frequent contact with the valve disc and improves sealing, thereby increasing the blocking effect of the flow path where the butterfly valve is installed and extending the life of the valve seat. The present invention provides a butterfly valve having a valve seat with a reinforcing ring installed therein to extend the overall service life of the butterfly valve.

1 is a partial cutaway perspective view showing an example of a valve according to the present invention.

2 is a partial cross-sectional view showing an example of a valve according to the present invention.

3 is a partial cross-sectional view showing an example of a conventional butterfly valve.

* Explanation of symbols for main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Valve body 2 Stem 3 Disk 5 Valve seat 6 Reinforcement ring

In order to achieve the above object, the butterfly valve having a valve seat with a reinforcing ring installed therein is provided with a ring-shaped valve seat (5) on the inner circumferential surface of the valve body (1). In the butterfly valve (A) in which the outer end of the disk (3) is selectively brought into close contact with the inner surface of the valve seat (5) while the disk (3) connected to the valve (3) rotates, a phenolic resin material is formed inside the valve seat (5). It is characterized in that the reinforcement ring (6) to be built.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

1 is a partial cutaway perspective view showing the configuration of a butterfly valve having a valve seat with a reinforcement ring installed therein according to the present invention, and FIG. 2 is a partial sectional view showing an example of a butterfly valve according to the present invention. 1) and the valve seat (5) located between the valve disc (3).

The valve seat 5 is made of an elastic rubber material having excellent elasticity, and a reinforcing ring 6 made of a phenolic resin material is formed on the inner surface thereof, and a mandrel is installed on the body 1 to rotate. The outer end of the disk 3, which is integrally installed on the stem 3, is in close contact with or separated from the inner circumferential surface of the valve seat 5 so that the flow path can be blocked or kept open.

In the case where the butterfly valve (A) in the present application to which the valve seat (5) provided with the inner reinforcing ring (6) is installed is installed in the middle of the piping line through which various fluids flow, the actuator (actuator) ( (Not shown) rotates the stem (2) and thus rotates with the disc (3) connected to the stem (2), the outer end of which is located between the valve body (1) and the disc (3) By maintaining the state in close contact with the inner circumferential surface of the valve seat (5) to keep the flow path in a blocked state, it is possible to maintain the flow path in the blocked state, wherein the reinforcing ring (6) inside the valve seat (5) ) Is installed inside the valve seat (5) due to the presence of the reinforcing ring (6) to increase the holding force of the valve seat as the flow is momentarily blocked in the flow of fluid at high pressure ( 5) Even if a high pressure is momentarily applied to the disk 3 contact surface, the valve seat 5 is prevented from being pushed back, flipped or deformed to maintain a more reliable seal, thereby improving the performance of the butterfly valve. Since the service life of the valve seat 5 can be extended, maintenance and repair costs for the entire piping line where the butterfly valve is installed can also be greatly reduced.

In the above configuration, the shape of the reinforcing ring 6 installed inside the valve seat 5 is not limited to the shape shown in the accompanying drawings in the present disclosure, and may be modified in more various forms.

As described above, although the present invention has been described with reference to the above embodiments, it is not necessarily limited thereto, and various modifications may be made without departing from the scope and spirit of the present invention.

As is clear from the above description, according to the butterfly valve having a valve seat with a reinforcing ring installed in the interior of the present invention, the inside of the valve seat, which is a key component for maintaining the flow of fluid to the flow path in which the butterfly valve is installed, is blocked. By incorporating and reinforcing a separate reinforcing ring made of phenolic resin in the valve, it is possible not only to prevent distortion of the valve seat, but also to prevent deformation of the valve seat. In addition to being able to maintain the crimped state in a rigid state, it is possible to reduce the torque by minimizing the expansion of the valve seat to ensure the long service life of the valve seat, thereby extending the overall service life of the butterfly valve. To provide useful effects.

Claims (2)

A ring-shaped valve seat 5 is installed on the inner circumferential surface of the valve body 1 so that the disk 3 connected to the stem 2 rotates, so that the outer end of the disk 3 selectively contacts the inner surface of the valve seat 5. In the butterfly valve (A) in close contact, A butterfly valve having a valve seat with a reinforcing ring installed therein, wherein the reinforcing ring 6 is installed inside the valve seat 5. The butterfly valve according to claim 1, wherein the reinforcing ring (6) is made of a phenolic resin material.