Stop valve

Abstract

The utility model discloses a stop valve which comprises a valve body and a valve clack, and a straight-through type flow channel and a valve clack installation cavity are arranged in the valve body. The valve clacks at least comprise a first valve clack and a second valve clack, and the second valve clack is arranged on the first valve clack in a sleeving mode and is in elastic sealing connection with the first valve clack; the valve body is provided with a first sealing part and a second sealing part, the first sealing part is matched with the first valve clack to achieve sealing, and the second sealing part is matched with the second valve clack to achieve sealing. Due to the straight-through type flow channel design, the resistance of the valve is smaller, and liquid circulation is smoother; a double-sealing structure is adopted, so that the sealing effect is better.

Description

Technical Field

[0001] The utility model relates to the field of globe valves, in particular to a through-type double-seal globe valve. Background Art

[0002] Most of the existing globe valves have a single sealing surface, and the flow channel holes are designed with inclined holes. As shown in the reference attachment Figure 1 The above globe valve has two problems. First, the non-through flow channel will increase the resistance when the fluid flows; second, when the single sealing surface is damaged, the sealing will fail and the globe valve will be scrapped.

[0003] The information disclosed in this background art section is only intended to enhance the understanding of the overall background of the utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the utility model provides a globe valve, which realizes a better sealing effect through the structural design of the flow channel and the valve flap.

[0005] The globe valve includes a valve body and a valve flap; a through-type flow channel and a valve flap installation cavity are arranged in the valve body; the valve flap at least includes a first valve flap and a second valve flap, the second valve flap is sleeved on the first valve flap and is elastically and sealingly connected with the first valve flap; a first sealing part and a second sealing part are arranged on the valve body, the first sealing part cooperates with the first valve flap to achieve sealing, and the second sealing part cooperates with the second valve flap to achieve sealing.

[0006] In some embodiments, during the process of closing the globe valve, the second valve flap and the second sealing part come into contact first to achieve a primary seal, and then the first valve flap and the first sealing part come into contact to achieve a secondary seal.

[0007] In some embodiments, the first valve flap and the second valve flap are connected together by an elastic connecting piece.

[0008] In some embodiments, the second sealing part is a sealing groove, and the lower edge of the second valve flap is lower than the lower edge of the first valve flap.

[0009] The beneficial effects of the utility model are as follows: the through-type flow channel design makes the valve have less resistance and the liquid flow more smoothly; the double-seal structure has a better sealing effect. Brief Description of the Drawings

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] Figure 1 is a structural schematic diagram of an existing globe valve;

[0012] Figure 2 is a structural schematic diagram of a globe valve of this solution;

[0013] In the figure, 10 is the valve body; 11 is the straight-through flow channel; 12 is the valve flap mounting cavity; 13 is the first sealing part; 14 is the second sealing part; 20 is the valve flap; 21 is the first valve flap; 22 is the second valve flap; 23 is the elastic connecting piece. Detailed implementation manners

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0016] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0017] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model 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 construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0018] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0019] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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 specific circumstances.

[0020] Embodiment 1

[0021] Refer to the attached Figure 2 As shown in the figure, the globe valve includes a valve body 10 and a valve flap 20; a straight-through flow channel 11 and a valve flap installation cavity 12 are provided inside the valve body 10; the valve flap 20 at least includes a first valve flap 21 and a second valve flap 22, the second valve flap 22 is sleeved on the first valve flap 21 and is elastically and sealingly connected to the first valve flap 21; a first sealing portion 13 and a second sealing portion 14 are provided on the valve body 10, the first sealing portion 13 cooperates with the first valve flap 21 to achieve sealing, and the second sealing portion 14 cooperates with the second valve flap 22 to achieve sealing.

[0022] During the process of closing the globe valve, the second valve flap 22 and the second sealing portion 14 come into contact first to achieve a primary seal, and then the first valve flap 21 and the first sealing portion 13 come into contact to achieve a secondary seal. The first valve flap 21 and the second valve flap 22 are connected together by an elastic connecting piece 23. The second sealing portion 14 is a sealing groove, and the lower edge of the second valve flap 22 is lower than the lower edge of the first valve flap 21.

[0023] In use, when the valve is closed and the valve stem moves downward, the valve stem drives the first valve flap 21 and the second valve flap 22 downward simultaneously. When the second valve flap 22 contacts the second sealing portion 14, the first valve flap 21 continues to move downward and contacts the first sealing portion 13, forming a double sealing surface. When the valve is opened, the elastic connecting piece 23 gives an upward force to the first valve flap 21. When the valve stem moves upward, the first valve flap 21 first disengages from the first sealing portion 13, and then the second valve flap 22 disengages from the second sealing portion 14, and the valve opens.

[0024] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A globe valve, comprising a valve body and a valve flap, characterized in that: A straight-through flow passage and a valve flap mounting cavity are provided inside the valve body; the valve flap at least includes a first valve flap and a second valve flap, the second valve flap is sleeved on the first valve flap and is elastically and sealingly connected to the first valve flap; a first sealing portion and a second sealing portion are provided on the valve body, the first sealing portion cooperates with the first valve flap to achieve sealing, and the second sealing portion cooperates with the second valve flap to achieve sealing.

2. The globe valve according to claim 1, characterized in that: During the process of closing the stop valve, the second valve flap and the second sealing portion come into contact first to achieve a primary seal, and then the first valve flap and the first sealing portion come into contact to achieve a secondary seal.

3. The globe valve according to claim 2, characterized in that: The first valve flap and the second valve flap are connected together by an elastic connecting piece.

4. The globe valve according to claim 3, characterized in that: The second sealing portion is a sealing groove, and the lower edge of the second valve flap is lower than the lower edge of the first valve flap.

Images