Double-sealing gate type sealing butterfly valve

Abstract

The utility model discloses a double-seal gate type sealing butterfly valve, which comprises a valve body, a valve plate and a valve rod, a valve cavity is arranged in the valve body, the valve body is provided with a mounting through hole and a mounting counter bore, the mounting through hole and the mounting counter bore are respectively positioned on two sides of the valve cavity, and the valve plate and the valve rod are arranged in the valve cavity. One end of each valve rod is matched with the corresponding mounting counter bore in a rotating mode, the valve rods are matched with the corresponding mounting through holes in a rotating and sealing mode, the valve plates are arranged on the valve rods, the number of the valve rods is two, the two valve rods are in a parallel and non-contact state, and each valve rod is provided with the corresponding valve plate. Compared with the prior art, the butterfly valve has the following beneficial effects that the mounting through hole and the mounting counter bore are formed in the valve body, rotation limiting of the valve rod is achieved from the two sides, the stability of the valve plate on the valve rod in the rotating process is improved, and the probability that the valve plate is clamped in the rotating process is reduced.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a double-sealed gate-type sealing butterfly valve. Background Art

[0002] A double-valve plate butterfly valve is a commonly used valve at present. Patent publication CN214743640U discloses a double-valve plate butterfly valve. This structure of the butterfly valve has two valve plates, which are used to control the opening and closing of the valve body. However, there is a problem with this structure of the butterfly valve, that is, the valve stem of this structure is only located at one end of the valve plate, so the stability of the valve plate of this structure during rotation is relatively poor, and the probability of the valve plate getting stuck during the rotation process is relatively high. Utility Model Content

[0003] In response to the above-mentioned problems, the utility model proposes a double-sealed gate-type sealing butterfly valve, which provides a mounting through hole and a mounting countersunk hole on the valve body to limit the rotation of the valve stem from both sides, thereby improving the stability of the valve plate on the valve stem during rotation and reducing the probability of the valve plate getting stuck during rotation.

[0004] The technical solutions adopted by this utility model are as follows:

[0005] A double-seal gate-type sealing butterfly valve includes a valve body, a valve cavity is provided in the valve body, and also includes a valve plate and a valve stem. The valve body is provided with a mounting through hole and a mounting countersunk hole, and the mounting through hole and the mounting countersunk hole are respectively located on both sides of the valve cavity. One end of the valve stem is rotatably engaged with the mounting countersunk hole, and the valve stem is rotatably and sealingly engaged with the mounting through hole. The valve plate is arranged on the valve stem. There are two valve stems, and the two valve stems are in a parallel and non-contact state. The valve plate is arranged on each valve stem.

[0006] In this type of sealed butterfly valve, the valve plate is arranged on the valve stem. Rotating the valve stem can realize the rotation of the valve plate in the cavity of the valve body. The rotation process of the valve plate can realize the opening and closing of the valve body cavity. In this type of sealed butterfly valve, mounting holes and mounting countersunk holes are provided on both sides of the valve body cavity, wherein the valve stem is rotatably installed in the mounting through hole, and one end of the valve stem is rotatably installed in the mounting countersunk hole. This is equivalent to both ends of the valve stem being in a limited state. The limited state of both ends of the valve stem can improve the stability of the valve plate during rotation and reduce the probability of the valve plate being stuck during rotation.

[0007] To sum up, in this type of butterfly valve, by arranging mounting through holes and mounting countersunk holes on the valve body, the rotation limit of the valve stem is achieved from both sides, which improves the stability of the valve plate on the valve stem during rotation and reduces the probability of the valve plate getting stuck during rotation.

[0008] Optionally, it further includes a valve seat, there are two valve seats, the valve seats are arranged in the valve body, and the valve seats are used to contact the valve plate.

[0009] The specific valve seat is installed on the step inside the valve body by screws. When the valve plate is close to the valve seat, sealing is achieved, and when the valve plate is not close to the valve seat, opening is achieved.

[0010] Optionally, it further includes a sealing ring and a retaining ring, wherein the sealing ring is arranged on the valve plate, and the retaining ring is arranged on the sealing ring.

[0011] The function of the sealing ring and retaining ring on the specific valve plate is to contact the valve seat. The contact between the sealing ring and retaining ring and the valve plate can improve the sealing performance when the valve plate and the valve seat are in contact.

[0012] Optionally, a sealing filler is provided between the valve stem and the valve body, and the sealing filler is located in the mounting through hole.

[0013] The function of sealing packing is to seal between the valve stem and the valve body.

[0014] Optionally, a plug is further included, which is arranged on the valve body, and a mounting countersunk hole is formed between the plug and the valve body.

[0015] Optionally, the two valve stems have the same structure and size.

[0016] Optionally, the valve plates on each valve stem have the same structure and size.

[0017] The beneficial effects of the utility model are as follows: by arranging mounting through holes and mounting countersunk holes on the valve body, the rotation limit of the valve stem is achieved from both sides, the stability of the valve plate on the valve stem during rotation is improved, and the probability of the valve plate getting stuck during rotation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a double-sealed gate-type sealing butterfly valve.

[0020] The reference numerals in the figure are: 1, valve body; 101, mounting through hole; 102, mounting countersunk hole; 2, valve stem; 3, sealing packing; 4, valve plate; 5, plug; 6, valve seat; 7, sealing ring; 8, retaining ring. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0024] As attached Figure 1 As shown, a double-sealed gate-type sealed butterfly valve includes a valve body 1, a valve cavity is provided in the valve body 1, and a valve plate 4 and a valve stem 2. The valve body 1 is provided with a mounting through hole 101 and a mounting countersunk hole 102. The mounting through hole 101 and the mounting countersunk hole 102 are respectively located on both sides of the valve cavity. One end of the valve stem 2 is rotatably engaged with the mounting countersunk hole 102, and the valve stem 2 is rotatably and sealedly engaged with the mounting through hole 101. The valve plate 4 is arranged on the valve stem 2. There are two valve stems 2. The two valve stems 2 are in a parallel and non-contact state. A valve plate 4 is provided on each valve stem 2.

[0025] In this sealed butterfly valve, the valve plate 4 is arranged on the valve stem 2. Rotating the valve stem 2 can realize the rotation of the valve plate 4 in the cavity of the valve body 1. The rotation process of the valve plate 4 can realize the opening and closing of the cavity of the valve body 1. In this sealed butterfly valve, mounting holes 101 and mounting countersunk holes 102 are provided on both sides of the cavity of the valve body 1, wherein the valve stem 2 is rotatably installed in the mounting through hole 101, and one end of the valve stem 2 is rotatably installed in the mounting countersunk hole 102, which is equivalent to both ends of the valve stem 2 being in a limited state. The limited state of both ends of the valve stem 2 can improve the stability of the valve plate 4 during rotation and reduce the probability of the valve plate 4 being stuck during rotation.

[0026] In summary, in this butterfly valve, by setting the mounting through hole 101 and the mounting countersunk hole 102 on the valve body 1, the rotation limit of the valve stem 2 is achieved from both sides, which improves the stability of the valve plate 4 on the valve stem 2 during rotation and reduces the probability of the valve plate 4 getting stuck during rotation.

[0027] As attached Figure 1 As shown, it also includes valve seats 6 , there are two valve seats 6 , the valve seats 6 are arranged in the valve body 1 , and the valve seats 6 are used to contact the valve plate 4 .

[0028] Specifically, the valve seat 6 is mounted on the step inside the valve body 1 by screws. When the valve plate 4 is in close contact with the valve seat 6 , sealing is achieved. When the valve plate 4 is not in close contact with the valve seat 6 , opening is achieved.

[0029] As attached Figure 1 As shown, it also includes a sealing ring 7 and a retaining ring 8. The sealing ring 7 is arranged on the valve plate 4, and the retaining ring 8 is arranged on the sealing ring 7.

[0030] Specifically, the sealing ring 7 and the retaining ring 8 on the valve plate 4 are used to contact the valve seat 6. The contact between the sealing ring 7 and the retaining ring 8 and the valve plate 4 can improve the sealing performance when the valve plate 4 and the valve seat 6 are in contact.

[0031] Specifically, the valve plate 4 is made of a hard material (including but not limited to metal), and the sealing ring 7 and the retaining ring 8 are made of a flexible material (including but not limited to rubber).

[0032] As attached Figure 1 As shown, a sealing filler 3 is provided between the valve stem 2 and the valve body 1 , and the sealing filler 3 is located in the mounting through hole 101 .

[0033] The function of the sealing packing 3 is to provide a seal between the valve stem 2 and the valve body 1 .

[0034] As attached Figure 1 As shown, a plug 5 is also included. The plug 5 is arranged on the valve body 1, and a mounting countersunk hole 102 is formed between the plug 5 and the valve body 1.

[0035] As attached Figure 1 As shown, the two valve stems 2 have the same structure and size.

[0036] As attached Figure 1 As shown, the valve plates 4 on each valve stem 2 have the same structure and size.

[0037] Combined with attachment Figure 1 As shown in the figure, both valve plates are in a closed state. When in the closed state, the two valve plates are axially symmetrically distributed. This is to achieve double sealing rings no matter from which direction the valve is pressurized.

[0038] The above-described embodiments only express some embodiments of the present invention. The description is relatively specific and detailed, but it should not be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, it is still possible to modify the technical solutions described in the above-mentioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model should be included in the scope of protection of this utility model.

Claims

1. A double-sealed gate-type sealing butterfly valve, comprising a valve body, wherein a valve cavity is provided in the valve body, characterized in that: It also includes a valve plate and a valve stem. The valve body is provided with a mounting through hole and a mounting countersunk hole. The mounting through hole and the mounting countersunk hole are respectively located on both sides of the valve cavity. One end of the valve stem is rotatably engaged with the mounting countersunk hole. The valve stem is rotatably and sealably engaged with the mounting through hole. The valve plate is arranged on the valve stem. There are two valve stems. The two valve stems are in a parallel and non-contact state. The valve plate is arranged on each valve stem.

2. A double-seal gate-type sealing butterfly valve according to claim 1, characterized in that: It also includes valve seats, there are two valve seats, the valve seats are arranged in the valve body, and the valve seats are used to contact the valve plate.

3. A double-seal gate-type sealing butterfly valve according to claim 1, characterized in that: It also includes a sealing ring and a retaining ring. The sealing ring is arranged on the valve plate, and the retaining ring is arranged on the sealing ring.

4. A double-seal gate-type sealing butterfly valve according to claim 1, characterized in that: A sealing filler is provided between the valve stem and the valve body, and the sealing filler is located in the mounting through hole.

5. A double-seal gate-type sealing butterfly valve according to claim 1, characterized in that: It also includes a plug, which is arranged on the valve body, and a mounting countersunk hole is formed between the plug and the valve body.

6. A double-seal gate-type sealing butterfly valve according to claim 1, characterized in that: The two valve stems have the same structure and size.

7. A double-seal gate-type sealing butterfly valve according to claim 6, characterized in that: The structure and size of the valve plate on each valve stem are consistent.

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