Double-seal stop valve

Abstract

The utility model belongs to the field of valves, and particularly relates to a double-seal stop valve. The double-seal stop valve comprises a valve body, a valve rod and a valve rod, wherein a cavity is formed in the valve body in the vertical direction; the valve rod is movably arranged in the cavity in the vertical direction, the valve rod is used for sealing the valve body when moving downwards in the vertical direction, and the valve rod is used for opening the valve body when moving upwards in the vertical direction; when the valve rod moves downwards in the vertical direction and seals the valve body, the main valve clack and the first sealing face make contact and are sealed in a matched mode. When the valve rod moves downwards in the vertical direction and seals the valve body, the auxiliary valve clack and the second sealing face make contact with each other and are sealed in a matched mode. According to the double-sealing stop valve, the double-layer sealing face and the main valve clack and the auxiliary valve clack which are matched with the double-layer sealing face are arranged, on one hand, the sealing effect is further improved, on the other hand, the defect that a single-sealing-face stop valve can be scrapped once the sealing face is damaged is overcome, and the use reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to a double-sealed stop valve. Background Art

[0002] Globe valves are sealed valves that can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Therefore, globe valves are ideally suited as key components for shutting off or regulating fluid flow. Because their opening and closing strokes are relatively short, they offer a highly reliable shutoff function.

[0003] However, the stop valves currently used in the market are all single sealing surface stop valves. Once the sealing surface is damaged, the stop valve will be scrapped and the reliability is poor.

[0004] Therefore, based on this, the technical solution of the present utility model is proposed. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a double-seal stop valve, which includes:

[0006] The valve body is provided with a chamber in a vertical direction;

[0007] a valve stem; the valve stem is movably disposed inside the chamber along the vertical direction, and is used to seal the valve body when the valve stem moves downward along the vertical direction, and is used to open the valve body when the valve stem moves upward along the vertical direction;

[0008] A main valve disc and a first sealing surface; when the valve stem moves downward in the vertical direction and seals the valve body, the main valve disc and the first sealing surface contact and adapt to seal;

[0009] Auxiliary valve flap and a second sealing surface; when the valve stem moves downward along the vertical direction and seals the valve body, the auxiliary valve flap and the second sealing surface contact and adapt to seal.

[0010] Preferably, the valve body further includes an elastic connecting portion; wherein:

[0011] One end of the elastic connection portion is connected to the main valve flap, and the other end of the elastic connection portion is connected to the auxiliary valve flap.

[0012] Preferably, the elastic connecting portion is an elastic metal connecting piece.

[0013] Preferably, the first sealing surface is arranged in parallel with the second sealing surface.

[0014] Preferably, in the vertical direction, the second sealing surface is higher than the first sealing surface.

[0015] Preferably, the valve body further comprises a fluid pipeline; wherein:

[0016] The fluid pipeline passes through the valve body.

[0017] Preferably, the fluid pipeline includes a first fluid pipeline, a connecting pipeline and a second fluid pipeline connected in sequence in a "Z" shape; wherein:

[0018] One end of the first fluid pipeline is an inlet end, used for introducing fluid;

[0019] The other end of the first fluid pipeline is connected to one end of the connecting pipeline;

[0020] The other end of the connecting pipeline is connected to one end of the second fluid pipeline;

[0021] The other end of the second fluid pipeline is an outlet end for leading out fluid.

[0022] In order to facilitate understanding of the solution of the present utility model, the working principle of the double seal stop valve is explained:

[0023] When the double-seal stop valve needs to be closed, the valve stem is set in the chamber to move downward in the vertical direction. At this time, the valve stem drives the main valve disc and the auxiliary valve disc downward at the same time. When the main valve disc contacts the first sealing surface, the auxiliary valve disc continues to move downward until the auxiliary valve disc contacts the second sealing surface, forming a double sealing surface.

[0024] When the double-seal stop valve needs to be opened, a valve stem is arranged in the chamber to move upward in the vertical direction. At this time, the valve stem first drives the auxiliary valve disc upward, causing it to separate from the second sealing surface first, and then the auxiliary valve disc drives the elastic connecting part and further drives the main valve disc upward. When it separates from the second sealing surface, the double-seal stop valve is opened.

[0025] The beneficial effects of the utility model are:

[0026] The double-sealed stop valve described in the utility model, by providing a "double-layer" sealing surface and a main valve disc and an auxiliary valve disc adapted thereto, on the one hand further improves the sealing effect, and on the other hand solves the disadvantage that the sealing surface of the stop valve with a single sealing surface can be scrapped once it is damaged, thereby improving the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 1 is a first structural schematic diagram of the double-seal stop valve.

[0029] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0030] Figure 3 1 is a second structural schematic diagram of the double-seal stop valve.

[0031] The accompanying drawings are denoted as follows:

[0032] 1-valve body; 11-chamber; 12-vertical direction; 13-elastic connecting part; 14-fluid pipeline; 141-first fluid pipeline; 1411-inlet end; 142-connecting pipeline; 143-second fluid pipeline; 1431-outlet end; 2-valve stem; 3-main valve disc; 4-first sealing surface; 5-auxiliary valve disc; 6-second sealing surface. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] In the description of this application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" or "several" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0036] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] Example 1

[0038] refer to Figure 1 and Figure 2 This embodiment provides a double-seal stop valve, the double-seal stop valve comprising:

[0039] The valve body 1 is provided with a chamber 11 along a vertical direction 12;

[0040] The valve stem 2 is movably disposed inside the chamber 12 along the vertical direction 12 , and is used to seal the valve body 1 when the valve stem 2 moves downward along the vertical direction 12 , and is used to open the valve body 1 when the valve stem 2 moves upward along the vertical direction 12 ;

[0041] Main valve disc 3 and first sealing surface 4; when the valve stem 2 moves downward along the vertical direction 12 and seals the valve body 1, the main valve disc 3 and the first sealing surface 4 contact and adapt to seal;

[0042] Auxiliary valve flap 5 and second sealing surface 6; when the valve stem 2 moves downward along the vertical direction 12 and seals the valve body 1, the auxiliary valve flap 5 and the second sealing surface 6 contact and adapt to seal.

[0043] Example 2

[0044] Based on Example 1, as an optional implementation method, refer to Figure 2 , the valve body 1 further includes an elastic connecting portion 13; wherein:

[0045] One end of the elastic connection portion 13 is connected to the main valve flap 3 , and the other end of the elastic connection portion 13 is connected to the auxiliary valve flap 5 .

[0046] As an optional implementation, the elastic connecting portion 13 is an elastic metal connecting piece.

[0047] This arrangement solves the problem of machining tolerances when the two sealing surfaces are sealed simultaneously, and also allows the two sealing surfaces to have a sealing sequence.

[0048] Example 3

[0049] Based on Example 1, as an optional implementation method, refer to Figure 2 , the first sealing surface 4 and the second sealing surface 6 are arranged in parallel.

[0050] As an optional embodiment, in the vertical direction 12 , the second sealing surface 6 is higher than the first sealing surface 4 .

[0051] Example 4

[0052] Based on Example 1, as an optional implementation method, refer to Figure 3 , the valve body 1 also includes a fluid pipeline 14; wherein:

[0053] The fluid pipeline 14 passes through the valve body 1 .

[0054] As an optional embodiment, the fluid pipeline 14 includes a first fluid pipeline 141, a connecting pipeline 142, and a second fluid pipeline 143 connected in sequence in a "Z" shape; wherein:

[0055] One end of the first fluid pipeline 141 is an inlet end 1411 for introducing fluid;

[0056] The other end of the first fluid pipeline 141 is connected to one end of the connecting pipeline 142;

[0057] The other end of the connecting pipeline 142 is connected to one end of the second fluid pipeline 143;

[0058] The other end of the second fluid pipeline 143 is an outlet end 1431 for leading out fluid.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A double seal stop valve, characterized in that: The double seal stop valve comprises: The valve body is provided with a chamber in a vertical direction; a valve stem; the valve stem is movably disposed inside the chamber along the vertical direction, and is used to seal the valve body when the valve stem moves downward along the vertical direction, and is used to open the valve body when the valve stem moves upward along the vertical direction; A main valve disc and a first sealing surface; when the valve stem moves downward in the vertical direction and seals the valve body, the main valve disc and the first sealing surface contact and adapt to seal; Auxiliary valve flap and a second sealing surface; when the valve stem moves downward along the vertical direction and seals the valve body, the auxiliary valve flap and the second sealing surface contact and adapt to seal.

2. The double seal stop valve according to claim 1, characterized in that: The valve body further includes an elastic connecting portion; wherein: One end of the elastic connection portion is connected to the main valve flap, and the other end of the elastic connection portion is connected to the auxiliary valve flap.

3. The double seal stop valve according to claim 2, characterized in that: The elastic connecting portion is an elastic metal connecting piece.

4. The double seal stop valve according to claim 1, characterized in that: The first sealing surface is arranged in parallel with the second sealing surface.

5. The double seal stop valve according to claim 4, characterized in that: In the vertical direction, the second sealing surface is higher than the first sealing surface.

6. The double seal stop valve according to claim 1, characterized in that: The valve body also includes a fluid pipeline; wherein: The fluid pipeline passes through the valve body.

7. The double seal stop valve according to claim 6, characterized in that: The fluid pipeline includes a first fluid pipeline, a connecting pipeline and a second fluid pipeline connected in sequence in a "Z" shape; wherein: One end of the first fluid pipeline is an inlet end, used for introducing fluid; The other end of the first fluid pipeline is connected to one end of the connecting pipeline; The other end of the connecting pipeline is connected to one end of the second fluid pipeline; The other end of the second fluid pipeline is an outlet end for leading out fluid.

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