KR-20260063576-A - Disc for high temperature differential pressure control valve

Abstract

The present invention relates to a disc for a high-temperature differential pressure control valve in which the bonding strength is increased by improving the contact area when the discs are laminated and brazed, by forming circular joints with a width of 1 mm or less concentrically and continuously on both surfaces of the disc to form a waveform. To this end, the present invention comprises a circular disk formed in a hollow shape, a plurality of radial channels formed radially on the surface and back of the disk at an alternating manner, and a plurality of concentric circular joints formed concentrically on the surface and back of the disk, avoiding the channels, wherein each of the channels is formed in a zigzag shape with a width increasing from the center outward, and each of the circular joints is formed as a curved surface and has the characteristic of being continuous in a wave shape.

Inventors

• 조계문
• 조운규
• 조운호

Assignees

• 주식회사 브이엠브이

Dates

Publication Date

20260507

Application Date

20241030

Claims (3)

1. It is configured to include a circular disk formed in a hollow shape, a plurality of radially formed channels that are staggered from each other on the surface and back surface of the disk, and a plurality of concentric circular joints that are continuous on the surface and back surface of the disk, avoiding the channels. Each of the above Euros is configured in a zigzag shape with increasing width from the center outward, and A disc for a high temperature differential pressure control valve, characterized in that each of the above-mentioned circular joints is continuous in a wavy shape having a curved surface to form a brazing surface.
2. In Article 1, A disc for a high-temperature differential pressure control valve, characterized by forming each of the circular joints by machining the surface and back surface of the disc on a CNC lathe, and then machining the fluid passage so that it is formed deeper than the circular joints.
3. In Article 1, A disc for a high-temperature differential pressure control valve characterized by having a passage formed on the surface and back of the disc that radially connects each of the circular joints to the same depth as the circular joints.

Description

Disc for high temperature differential pressure control valve The present invention relates to a disc for a high-temperature differential pressure control valve, and more specifically, to a disc for a high-temperature differential pressure control valve in which circular joints with a width of 1 mm or less are formed concentrically and continuously on both surfaces of the disc to form a wave shape, thereby increasing the bonding strength by improving the contact area when the disc is laminated and brazed. Generally, the disc stacks embedded in high-temperature differential pressure valves used in power plants primarily serve to precisely regulate fluid flow and distribute pressure. Due to the nature of power plants operating in high-temperature and high-pressure environments, the disc stacks must possess high heat and pressure resistance and enable accurate flow rate control. A disk stack consists of multiple disks stacked on top of each other, with minute gaps between them. As fluid passes through these gaps, pressure changes and flow is regulated; by adjusting the degree of opening and closing of the disks, the volume of fluid flow can be precisely controlled. The disk stack regulates power generation by controlling the amount of steam flowing into the turbine, ensures stable operation by maintaining constant pressure within the system, separates liquids and gases or removes impurities, and can regulate the temperature of the fluid through heat exchange occurring on the disk surface. However, since it is used in high-temperature and high-pressure environments, periodic inspection and maintenance are required, and performance may deteriorate due to wear and tear during long-term use. In particular, conventional disc stacks had a problem in that, since the stacked discs are bonded by brazing, the adhesive strength decreases when the surface is smooth, causing the discs to separate in high-pressure environments and making it impossible to maintain constant pressure. <Prior Art Research Literature> Reference 1: Registered Patent Publication No. 10-1376393 Reference 2: Registered Patent Publication No. 10-2633376 FIG. 1 is a perspective view of a disc for a high-temperature differential pressure control valve according to one embodiment of the present invention with a joint formed therein, and FIG. 2 is a perspective view of a disk for a high-temperature differential pressure control valve according to one embodiment of the present invention with a flow path formed therein. FIG. 3 is a conceptual diagram showing the specifications of a joint formed on a disc for a high-temperature differential pressure control valve according to one embodiment of the present invention, and FIG. 4 is a cross-sectional view of a disk for a high-temperature differential pressure control valve of one embodiment of the present invention stacked in a stacked state. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIGS. 1 to 3, the disc (10) for a high-temperature differential pressure control valve of one embodiment of the present invention is composed of a thin, hollow disc with a through hole in the center, and circular joints (11) are continuously formed concentrically on the surface and back surface in a wavy shape. The above circular joint (11) is preferably machined by rotating the disk (10) on a CNC lathe, and is machined so that the width (H) is 0.5 mm, the depth (T) is 0.02 mm, and the radius of curvature (R) is 1.5 mm. The above disk (10) forms a plurality of radial channels (13) after processing the circular joint (11). Each of the above Euros (13) is configured in a zigzag shape, with the width increasing as it extends outward from the center of the disk (10). Each of the above-mentioned channels (13) is formed deeper than the circular joint (11), so that the circular joint (11) is removed at the place where the channel (13) is formed. The circular joints (11) remaining between each of the above-mentioned Euros (13) form a straight passage (12) toward the center of the disk (10). The above passage (12) is formed to the same depth as the above circular joint (11) and connects each circular joint (11). The disc for the high-temperature differential pressure control valve of one embodiment of the present invention configured as such is stacked in a stacked form as shown in FIG. 4. First, a sheet (20) with a thickness of about 0.05 mm is cut so that it overlaps the surface between the Euro (13) and the Euro (13), but the edges of the sheet (20) are cut so that they do not encroach on the Euro (13). Next, a sheet (20) cut to avoid the Euro (13) is placed on the surface of the disk (10), and another disk (10) is stacked on top of it to stack multiple disks in a stacked form. Subsequently, when the stacked discs are brazed in a high-temperature atmosphere, the sheet (20) melts and fills the circular joints (11) formed in the stacked discs (10