Gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a gate valve. The gate valve comprises a valve body, a medium inlet and a medium outlet are formed in the two ends of the valve body respectively, a gate plate is arranged in the valve body, and the sealing face, making contact with the valve body, of the gate plate is of an arc-shaped sealing face structure. According to the gate valve, the sealing face is easier to machine, sealing is easier, and the sealing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a gate valve. Background Art

[0002] Gate valves are a common type of valve, widely used in industries such as central air conditioning, chemical processing, power generation, water supply and drainage, petroleum, and pipeline transportation. A gate valve's structure primarily consists of a valve body, valve seat, gate disc, valve stem, gasket, valve cover, packing, bracket, stem nut, and handwheel. Its operating principle is to open and close the valve by rotating the handwheel, which, through the advancement and retraction of the threads between the handwheel and the valve stem, raises or lowers the gate disc connected to the valve stem. The upper and lower parts of the gate disc are connected to the valve stem and valve seat, respectively. Rotating the valve stem raises and lowers the gate disc, thereby changing the flow of the medium. When the gate disc is raised, the medium can flow smoothly through the valve, achieving a fully open state. When the gate disc is lowered, a seal is formed between the gate disc and the valve seat, preventing the medium from passing through the valve, achieving a fully closed state. Adjusting the rotation angle of the valve stem controls the raising and lowering of the gate disc, thereby controlling the flow of the medium.

[0003] However, in existing gate valves, the sealing surfaces where the gate plate contacts the valve body are all planar sealing structures. Since this conventional planar sealing structure has a wide width, high processing requirements, and a general sealing effect.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The utility model aims at providing a gate valve; the sealing surface of the gate valve is simpler to process, easier to seal, and has a good sealing effect.

[0006] In order to solve the above technical problems, the utility model provides a gate valve, including a valve body, a medium inlet and a medium outlet are respectively provided at both ends of the valve body, a gate plate is provided in the valve body, and the sealing surface where the gate plate contacts the valve body is an arc-shaped sealing surface structure.

[0007] Furthermore, the arc-shaped sealing surface structure is an annular boss; the protrusion of the annular boss is in sealing contact with the valve body; and the annular boss is symmetrically arranged along the outer edges of both side plate surfaces of the gate plate.

[0008] Furthermore, the annular boss and both side surfaces of the gate plate are integrally formed.

[0009] Furthermore, the annular boss is made of alloy or stainless steel.

[0010] Furthermore, the gate plate is a wedge-shaped gate plate or a flat gate plate.

[0011] Furthermore, the gate plate is a wedge-shaped gate plate.

[0012] Furthermore, grooves are symmetrically provided at the centers of both side surfaces of the wedge-shaped gate plate.

[0013] Furthermore, the groove is a rectangular groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model designs the sealing surface where the gate plate contacts the valve body into an arc-shaped sealing surface structure, so that the sealing surface is easier to process, easier to seal, and has a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional view of the gate valve proposed in the present utility model;

[0018] Figure 2 This is a structural diagram of one side of the gate plate proposed by the present invention;

[0019] Figure 3 The cross-sectional view shows that the sealing surface between the gate and the valve body is a flat seal.

[0020] Description of reference numerals:

[0021] 1-valve body; 2-annular boss;

[0022] 3-gate; 4-groove. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] See Figure 1-2 As shown in FIG, the gate valve proposed by the present invention comprises a valve body 1, a medium inlet and a medium outlet are provided at both ends of the valve body 1, a gate plate 3 is provided in the valve body 1, and the sealing surface where the gate plate 3 contacts the valve body 1 is an arc-shaped sealing surface structure. Figure 3 As shown in the figure, when the arc-shaped sealing surface structure is designed, the gate and the valve body are linearly sealed. This design can reduce the processing requirements of the sealing surface, make the processing simpler, seal easier, and have a good sealing effect.

[0027] In the technical solution of the present invention, as a preferred embodiment, the arc-shaped sealing surface structure is specifically an annular boss 2; the protruding portion of the annular boss 2 is in sealing contact with the valve body 1 to form a linear seal. More specifically, the annular boss 2 is symmetrically arranged along the outer edge of the plate surface on both sides of the gate plate 1, that is, the annular boss 2 is provided on the plate surface on both sides of the gate plate 1 along the medium flow direction, and is arranged along the outer edge of the plate surface. It is understandable that the annular boss 2 of the present invention can be integrally formed with the plate surface, or it can be fixedly connected. In addition, those skilled in the art can also select the material of the annular boss 2 according to actual use requirements, including but not limited to alloy or stainless steel.

[0028] Based on the above technical solution, the gate plate 3 in the present invention can generally be a wedge-shaped structure, that is, the gate plate is wedge-shaped, or it can be a flat plate structure, that is, the gate plate is straight. The wedge-shaped gate plate or flat plate gate plate here are both conventional technologies in the field and will not be described in detail here. As a preferred embodiment, the gate plate of the present invention is preferably a wedge-shaped gate plate, and grooves 4 are further provided at the center of the two side surfaces of the wedge gate plate. By providing grooves 4 on both sides of the wedge gate plate, the deformation of the gate plate can be increased when closed, thereby better adapting to the shape of the sealing surface and improving the sealing effect. Preferably, groove 4 is a rectangular groove.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gate valve, comprising a valve body, a medium inlet and a medium outlet at both ends of the valve body, a gate plate provided in the valve body, characterized in that: The sealing surface where the gate plate contacts the valve body is an arcuate sealing surface structure; the arcuate sealing surface structure is an annular boss; the protrusion of the annular boss is in sealing contact with the valve body; the annular boss is symmetrically arranged along the outer edges of both side plates of the gate plate.

2. The gate valve according to claim 1, characterized in that The annular boss and the two side surfaces of the gate plate are integrally formed.

3. The gate valve according to claim 1, characterized in that The annular boss is made of alloy or stainless steel.

4. The gate valve according to any one of claims 1 to 3, characterized in that: The gate plate is a wedge-shaped gate plate or a flat gate plate.

5. The gate valve according to claim 4, characterized in that The gate plate is a wedge-shaped gate plate.

6. The gate valve according to claim 5, characterized in that Grooves are symmetrically arranged at the centers of both side surfaces of the wedge gate.

7. The gate valve according to claim 6, characterized in that The groove is a rectangular groove.

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