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KR-102964769-B1 - ROTARY PLATE TYPE GATE VALVE

KR102964769B1KR 102964769 B1KR102964769 B1KR 102964769B1KR-102964769-B1

Abstract

A flat plate rotary gate valve is disclosed, which improves the operating method for controlling fluid flow in a pipeline. A flat plate rotary gate valve according to one aspect of the present invention may include: a housing having a gate space formed internally and an opening formed to communicate with the gate space, and a flow path formed through the opening; and a rotary gate that rotates within the gate space and rotates between an open position where the opening area of the flow path is maximized and a closed position where the opening area of the flow path is minimized. Here, the rotary gate may include a coupler that rotates around a rotation axis extending in a first direction; a connecting part extending from the coupler along a second direction intersecting the first direction; and a gate plate formed at the end of the connecting part, wherein in the closed position, the gate plate may be positioned adjacent to the opening with respect to the first direction.

Inventors

  • 이상헌

Dates

Publication Date
20260513
Application Date
20250923

Claims (9)

  1. A housing having a gate space formed internally, an opening formed communicating with said gate space, a flow path formed passing through said opening, and a shaft hole formed at a position spaced apart from said opening; A rotating gate that rotates within the gate space, between an open position where the opening area of the fluid path is maximized and a closed position where the opening area of the fluid path is minimized; and It includes a fixing cap coupled to the shaft hole on the outer side of the housing and having a through hole formed in the center for a shaft that rotates the rotating gate to pass through, The above rotary gate is, A coupler that receives power from the above shaft and rotates around a rotation axis extending in a first direction; A connecting portion extending along a second direction intersecting the first direction from the above coupler; and It includes a gate plate formed at the end of the above-mentioned connection part, and In the above closed position, the gate plate is positioned adjacent to the opening with respect to the first direction, and Either one of the coupler and the fixing cap is provided with a coupling rim, and the other of the coupler and the fixing cap is provided with an outer rim and an inner rim that form a coupling groove between them, wherein the through hole is formed on the inner side of the coupling rim, the outer rim, and the inner rim. With the first and second low-friction ring members disposed in the coupling groove, the coupling rim is inserted into the coupling groove, wherein the first and second low-friction ring members each have a flat surface and are disposed adjacently within the coupling groove such that the flat surfaces come into contact with each other. The first low-friction ring member rotates together with the coupler, and the second low-friction ring member remains fixed together with the fixing cap. A flat rotary gate valve characterized in that the shaft passes through the shaft hole and the through hole and is coupled to the coupler.
  2. In Article 1, A flat plate rotary gate valve characterized in that the housing has a first opening and a second opening formed along the first direction, and in the closed position, the gate plate is located between the first opening and the second opening.
  3. In Article 1, A flat plate rotary movable gate valve characterized in that the rotary gate further includes a sealing member located on the surface of the gate plate, and when the rotary gate is in the closed position, the sealing member is in close contact with the housing wall in which the opening is formed to seal the opening.
  4. In Article 1, The above-mentioned rotary gate has a gate hole formed that penetrates the gate plate, and A flat plate rotary movable gate valve characterized in that, in the open position, the gate hole is positioned adjacent to the opening, and in the closed position, a portion of the gate plate where the gate hole is not formed is positioned adjacent to the opening.
  5. In Article 1, A flat rotary gate valve characterized in that at least one of the first and second low-friction ring members comprises one or more materials selected from silicon carbide, tungsten carbide, carbon graphite, PTFE (polytetrafluoroethylene), alumina ceramic, and DLC (diamond-like carbon) coating.
  6. In Article 1, A packing is disposed between the first low-friction ring member and the coupler, and A flat rotary gate valve characterized in that the above packing does not contact the shaft.
  7. In Article 1, A packing is disposed between the second low-friction ring member and the fixing cap, and A flat rotary gate valve characterized in that the above packing does not contact the shaft.
  8. In Article 1, A flat rotary gate valve characterized by having a packing disposed between the first low-friction ring member and the coupler, and a packing disposed between the second low-friction ring member and the fixed cap.
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Description

Rotary Plate Type Gate Valve The present invention relates to a valve, and more specifically, to a gate valve that improves the operating method for controlling fluid flow in a pipeline. A valve is a device for controlling the flow rate, and allows the amount of fluid passing through the valve to be controlled according to the degree to which a part that moves according to the user's operation opens and closes the pipeline. A conventional gate valve (10) according to the prior art is conceptually illustrated in FIG. 1. Referring to FIG. 1, a conventional gate valve (10) has openings (1) formed on both sides and is configured to regulate the flow rate passing between the openings (1) on both sides. A disc (35) is formed inside the gate valve (10) to open and close the conduit between the openings (1). A connecting flange (14) is provided around the openings (1) so that the gate valve (10) can be connected between two pipes. In such a gate valve (10), the flow rate can be controlled according to the degree to which the conduit is opened by the disc (35). The disc (35) is formed at one end of the stem (32), and an operating wheel (31) for operating the disc (35) is formed at the other end of the stem (32). The user can adjust the height of the disc (35), for example, by rotating the operating wheel (31), which changes the degree to which the disc (35) blocks the conduit. A globe valve according to the prior art also has a similar structure. In such a conventional gate valve (10), the stem (32) is configured to pass through the bonnet (13). That is, a part of the stem (32) is located inside the valve (10) and another part is located outside the valve (10). In the conventional gate valve (10), a gland packing (34), a back seat (36), etc. are placed in this part to prevent fluid leakage. However, in addition to the stem (32) penetrating the bonnet (13), the stem (32) moves along the direction penetrating the bonnet (13), and when the disc (35) is operated by the rotation of the operating wheel (31), the stem (32) moves while also rotating. This structure makes it difficult to prevent leakage in the area where the stem (32) passes. Furthermore, since friction with the packing occurs whenever the stem (32) operates, damage and wear to the packing (34, 36) and the bonnet (13) are inevitable, and eventually, a problem of fluid leakage from the gate valve (10) occurs. This not only causes the inconvenience of having to replace or repair the valve (10), but also causes additional inconvenience by preventing the supply of fluid during the replacement or repair period. FIG. 1 is a conceptual diagram exemplarily illustrating a gate valve according to the prior art. FIG. 2 is a perspective view illustrating an exemplary gate valve according to an embodiment of the present invention. FIG. 3 is an exploded perspective view illustrating an exemplary gate valve according to an embodiment of the present invention. FIG. 4 is a front view exemplarily showing a gate valve according to an embodiment of the present invention. FIG. 5 is a plan view of a gate valve according to an embodiment of the present invention, viewed from above and below. FIG. 6 is an exploded perspective view exemplarily showing a rotary gate of a gate valve according to an embodiment of the present invention. FIG. 7 is a conceptual diagram exemplarily illustrating the operation of a rotary gate in a gate valve according to an embodiment of the present invention. FIG. 8 is a cross-sectional perspective view illustrating an exemplary fixing cap of a gate valve according to an embodiment of the present invention. FIG. 9 is a cross-sectional view exemplarily showing the combination of a rotary gate and a fixed cap in a gate valve according to an embodiment of the present invention. FIG. 10 is a cross-sectional view exemplarily showing the combination of a rotary gate and a fixed cap in a gate valve according to another embodiment of the present invention. FIG. 11 is a front view exemplarily showing a gate valve according to another embodiment of the present invention. FIG. 12 is a conceptual diagram exemplifying the operation of a rotary gate in a gate valve illustrated in FIG. 11. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention. The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includ