KR-102963383-B1 - Valve disc for water contro valve that do not leak even in earthquakes

Abstract

The present invention relates to a valve disc for a water shut-off valve that opens and closes a water supply and sewage channel, comprising: a disc-shaped disc body (110) that moves up and down on a valve body (11) of the water shut-off valve and opens and closes the water supply channel of the water shut-off valve; and a disc seat (111) that expands a certain area on the outer surface of the disc body (110), contacts a valve seat (11a) of the valve body (11), and blocks the movement of water, wherein the surface of the disc seat (111) that contacts the valve seat (11a) is preferably provided as a curved surface (111a) having a certain curvature.

Inventors

• 전영빈
• 전표원

Dates

Publication Date

20260511

Application Date

20230213

Claims (3)

1. In a valve disc for a water shut-off valve that opens and closes a water supply and sewage system, A disc-shaped disc body (110) that moves up and down on the valve body (11) of the above-mentioned water shut-off valve and opens and closes the conduit of the above-mentioned water shut-off valve; It includes a disc seat (111) that is extended over a certain area on the outer surface of the disc body (110) and contacts the valve seat (11a) of the valve body (11) to block the movement of water, and The above-mentioned disc seat (111) is provided with a curved surface (111a) having a radius of curvature of 4mm to 7mm on the surface that contacts the above-mentioned valve seat (11a), thereby making point contact with the above-mentioned valve seat (11a), and is characterized in that the contact state with the above-mentioned disc body (110) is maintained even when the above-mentioned disc body (110) is twisted.
2. delete
3. In paragraph 1, A valve disc for a water supply valve, characterized in that the above-mentioned disc sheet (111) is formed by being integrally cast with the above-mentioned disc body (110) or is welded to the above-mentioned disc body (110).

Description

Valve disc for water control valve that does not leak even in earthquakes The present invention relates to a valve disc, and more specifically, to a valve disc used in a water shut-off valve. Generally, water supply and sewage systems are equipped with shut-off valves to control the flow of water, opening and closing the system according to the situation. In this case, gate valves are primarily used as the shut-off valves connected to the pipes of the water supply and sewage system. FIG. 1 is a cross-sectional view illustrating the configuration of a conventional shut-off valve (10). As shown in FIG. 1, the shut-off valve (10) is positioned between a pair of adjacent water pipes (1). The shut-off valve (10) includes a valve body (11) connected between the pipes (1), a disc (12) that moves up and down inside the valve body (11), a stem (13) extending above the disc (12), and a handle (14) connected to the stem (13). On both sides of the valve body (11), an inlet pipe and an outlet pipe are each connected to a pipe body (1), and a disc (12) is provided between the inlet pipe and the outlet pipe so as to be raised and lowered by a stem (13). The stem (13) is screw-coupled to the valve housing (15) and causes the disc (12) to move up and down by rotating the handle (14). At this time, a disc seat (12a) is provided on the outer circumference of the disc (12) to extend over a certain area, and when the disc seat (12a) descends to the valve body (11), it comes into contact with the valve seat (11a) inside the valve body (11) and blocks the movement of water. FIG. 2(a) is a cross-sectional example illustrating the contact state between a conventional valve seat (11a) and a disc seat (12a). As shown, the conventional disc seat (12a) has a rectangular cross-section and comes into surface contact with the valve seat (11a), thereby blocking the movement of water. In this case, the contact area is large, so a large frictional torque is applied to the contact surface between the disc seat (12a) and the valve seat (11a). Accordingly, there was a disadvantage in that the operator rotating the handle (14) had to apply a large force to rotate the stem (13) when moving the disc (12) up and down to open and close the valve body (11). In particular, when the diameter of the disc (12) is large, multiple workers may have to apply force together, or in some cases, a lever may have to be used. In addition, as shown in Fig. 2 (b), if an earthquake occurs or ground subsidence occurs and the disc seat (12a) becomes twisted, the contact between the disc seat (12a) and the valve seat (11a) is released, and a problem may occur in which water (W) leaks. FIG. 1 is a cross-sectional example illustrating the state in which a conventional shut-off valve is installed in a water supply pipe. FIG. 2 is an example cross-sectional view showing an enlarged view of the bonding surface between the valve seat and the disc seat of a conventional water shut-off valve. FIG. 3 is a drawing illustrating the configuration of a valve disc according to the present invention. FIG. 4 is an example cross-sectional view showing an enlarged view of the adhesive surface between the disc seat and the valve seat of the valve disc according to the present invention. To fully understand the present invention, preferred embodiments of the invention are described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. These embodiments are provided to more completely explain the present invention to those with average knowledge in the art. Accordingly, the shapes of elements in the drawings may be exaggerated to emphasize clearer explanations. It should be noted that in each drawing, identical components may be depicted with the same reference numeral. Detailed descriptions of known functions and configurations that are deemed to unnecessarily obscure the essence of the present invention are omitted. FIG. 3(a) is a front view of a valve disc (100) according to the present invention, and FIG. 3(b) is a side cross-sectional view of a valve disc (100). As described above, the valve disc (100) according to the present invention comprises a disc body (110) in the shape of a disc, a disc seat (111) provided to extend a certain area on the outer circumference of the disc body (110) and in contact with the valve seat (11a) of the valve body (11) to block the movement of water, and a stem coupling end (120) extended on the upper part of the valve body (11) and coupled with a stem (13). The disc body (110) is provided in the shape of a disc and is formed of a metal material. The disc body (110) is provided to correspond to the conduit of the valve body (11) and descends to block the conduit of the valve body (11), thereby blocking the movement of water. Here, the disc body (110) of the present in