Novel butterfly valve capable of preventing butterfly plate from being damaged

Abstract

The utility model provides a novel butterfly valve capable of preventing a butterfly plate from being damaged, which comprises a valve body and the butterfly plate, the butterfly plate is rotationally mounted in the valve seat through a pivot, and the butterfly plate is fixedly connected with one end of the valve rod; through the arrangement of the arc-shaped shielding piece and the arc-shaped shielding piece II, the contact part between the valve seat and the butterfly plate can be shielded and sealed, the sealing area between the valve seat and the butterfly plate is increased, the sealing performance between the valve seat and the butterfly plate can be continuously ensured after the sealing surface of the butterfly plate is abraded, leakage is prevented after the sealing surface of the butterfly plate is abraded, and the service life of the butterfly plate is prolonged. Meanwhile, the arc-shaped sealing strip is matched with the arc-shaped sealing groove, so that after the sealing surface of the butterfly plate is abraded, the sealing performance between the butterfly plate and the arc-shaped shielding sheet and the sealing performance between the butterfly plate and the arc-shaped shielding sheet II can be guaranteed, the service life of the butterfly plate is effectively prolonged, the maintenance and replacement times of the butterfly plate are reduced, and the whole butterfly plate is safer and more reliable.

Description

Technical Field

[0001] The utility model belongs to the field of butterfly valves, and in particular relates to a novel butterfly valve capable of preventing butterfly plates from being damaged. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for switching control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. They mainly play the role of cutting off and throttling in pipelines. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0004] As we all know, the butterfly plate of a butterfly valve is one of the key components used to control the flow and direction of the medium. Since the butterfly plate will rub against the valve seat during the switching process and will be washed away by impurities in the medium, over time, this friction and washing will damage the sealing surface, resulting in a decrease in sealing performance, thus affecting the overall service life.

[0005] Therefore, it is very necessary to invent a new type of butterfly valve that prevents butterfly plate from being damaged. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a new type of butterfly valve for preventing butterfly plate damage. The technical solution is as follows: a new type of butterfly valve for preventing butterfly plate damage comprises a valve body and a butterfly plate, wherein: a valve seat and a valve stem are fixedly installed inside the valve body; the butterfly plate is installed inside the valve seat by pivoting, and the butterfly plate is fixedly connected to one end of the valve stem;

[0007] Preferably, an arc-shaped shielding piece is fixedly installed on one side of the front face of the valve seat, and an arc-shaped shielding piece 2 is fixedly installed on the other side of the back face of the valve seat, and an arc-shaped sealing strip is fixedly installed on each of the arc-shaped shielding piece and the arc-shaped shielding piece 2; the butterfly plate is rotatably installed between the arc-shaped shielding piece and the arc-shaped shielding piece 2;

[0008] Preferably, one side of the front side of the butterfly plate and the other side of the back side are each provided with an arc-shaped sealing groove matching the arc-shaped sealing strip; the arc-shaped sealing strip is clamped with the corresponding arc-shaped sealing groove.

[0009] Preferably, a toothed disc is fixedly mounted on the valve body, and the toothed disc is rotationally connected to the valve stem.

[0010] Preferably, a handle is fixedly mounted on the top end of the valve stem, and the handle is rotatably connected to the toothed disc.

[0011] Preferably, an axial hole is formed through the valve seat; the valve stem and the pivot are rotatably installed in the corresponding axial hole.

[0012] Preferably, an integrated valve stem hole seat is provided on the circumferential surface above the butterfly plate, and an integrated pivot hole seat is provided on the circumferential surface below the butterfly plate; the bottom end of the valve stem is fixedly connected to the valve stem hole seat; the top end of the pivot is rotatably connected to the pivot hole seat.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] The utility model can shield and seal the contact part between the valve seat and the butterfly plate by arranging the arc-shaped shielding piece and the arc-shaped shielding piece 2, thereby increasing the sealing area between the valve seat and the butterfly plate, and can continue to ensure the sealing between the valve seat and the butterfly plate after the sealing surface of the butterfly plate is worn, and prevent leakage after the sealing surface of the butterfly plate is worn. At the same time, through the arrangement of the arc-shaped sealing strip and the arc-shaped sealing groove, the sealing between the butterfly plate and the arc-shaped shielding piece and the arc-shaped shielding piece 2 can be ensured after the sealing surface of the butterfly plate is worn, thereby effectively increasing the service life of the butterfly plate, and reducing the number of times the butterfly plate is repaired and replaced, making the whole safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a half-section structure of a valve seat of the utility model.

[0016] Figure 2 It is a schematic diagram of the explosion structure of the valve body and butterfly plate of the utility model.

[0017] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0018] Valve body 1, valve seat 2, arc-shaped shielding piece 21, arc-shaped shielding piece 22, arc-shaped sealing strip 23, shaft hole 24, butterfly plate 3, valve stem hole seat 31, pivot hole seat 32, arc-shaped sealing groove 33, valve stem 4, pivot 5, gear disc 6, handle 7. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0020] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Embodiment 1

[0023] Reference Figure 1-3 A new type of butterfly valve for preventing butterfly plate damage comprises a valve body 1 and a butterfly plate 3, wherein: a valve seat 2 and a valve stem 4 are fixedly installed inside the valve body 1; the butterfly plate 3 is rotatably installed inside the valve seat 2 through a pivot 5, and the butterfly plate 3 is fixedly connected to one end of the valve stem 4;

[0024] An arc-shaped shielding piece 21 is fixedly installed on one side of the front of the valve seat 2, and an arc-shaped shielding piece 22 is fixedly installed on the other side of the back of the valve seat 2. Through the arrangement of the arc-shaped shielding piece 21 and the arc-shaped shielding piece 22, the contact part between the butterfly plate 3 and the valve seat 2 can be shielded, and the contact area between the butterfly plate 3 and the valve seat 2 can be increased. In this way, after the sealing surface of the butterfly plate 3 is worn, the sealing between the butterfly plate 3 and the valve seat 2 can continue to be guaranteed. The arc-shaped shielding piece 21 and the arc-shaped shielding piece 22 are each fixedly installed with an arc-shaped sealing strip 23; the butterfly plate 3 is rotatably installed between the arc-shaped shielding piece 21 and the arc-shaped shielding piece 22;

[0025] It should be noted that the arc-shaped shielding piece 21 and the arc-shaped shielding piece 22 are coaxial and form a circular ring, and the inner diameter between the arc-shaped shielding piece 21 and the arc-shaped shielding piece 22 is smaller than the diameter of the butterfly plate 3.

[0026] An arcuate sealing groove 33 matching the arcuate sealing strip 23 is provided on one side of the front face of the butterfly plate 3 and on the other side of the back face. By coordinating the arcuate sealing groove 33 with the arcuate sealing strip 23, the sealing between the butterfly plate 3 and the valve seat 2 can be ensured after the butterfly plate 3 is closed and the sealing surface of the butterfly plate 3 is worn; the arcuate sealing strip 23 is clamped with the corresponding arcuate sealing groove 33.

[0027] In this embodiment, when in use, the new butterfly valve for preventing the butterfly plate from being damaged is fixedly installed on the required pipeline through the valve body 1;

[0028] When the butterfly plate 3 needs to be opened, the valve stem 4 is simply rotated clockwise by the handle 7, and then the opening angle of the butterfly plate 3 is determined according to the toothed disc 6;

[0029] When the butterfly plate 3 needs to be closed, the valve stem 4 is simply rotated counterclockwise by the handle 7, and then the closing angle of the butterfly plate 3 is determined according to the toothed disc 6;

[0030] In the process of opening and closing the butterfly plate 3, the peripheral surface of the butterfly plate 3 will rub against the valve seat 2. When the peripheral surface of the butterfly plate 3 is worn, due to the arrangement of the arc-shaped shielding piece 21 and the arc-shaped shielding piece 22, the contact part between the butterfly plate 3 and the valve seat 2 can be shielded after the butterfly plate 3 is closed, and the contact area between the butterfly plate 3 and the valve seat 2 is increased. In this way, after the sealing surface of the butterfly plate 3 is worn, the sealing between the butterfly plate 3 and the valve seat 2 can continue to be ensured;

[0031] At the same time, after the butterfly plate 3 is closed, the arcuate sealing strip 23 will be stuck in the corresponding arcuate sealing groove 33, so that there is a multiple sealing effect between the butterfly plate 3 and the valve seat 2.

[0032] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A new type of butterfly valve for preventing butterfly plate damage, characterized in that: The valve comprises a valve body (1) and a butterfly plate (3), wherein: a valve seat (2) and a valve stem (4) are fixedly installed inside the valve body (1); the butterfly plate (3) is rotatably installed inside the valve seat (2) via a pivot (5), and the butterfly plate (3) is fixedly connected to one end of the valve stem (4); A curved shielding sheet (21) is fixedly mounted on one side of the front face of the valve seat (2), and a second curved shielding sheet (22) is fixedly mounted on the other side of the back face of the valve seat (2), and a curved sealing strip (23) is fixedly mounted on each of the curved shielding sheet (21) and the second curved shielding sheet (22); the butterfly plate (3) is rotatably mounted between the curved shielding sheet (21) and the second curved shielding sheet (22); One side of the front side of the butterfly plate (3) and the other side of the back side are each provided with an arc-shaped sealing groove (33) matching the arc-shaped sealing strip (23); the arc-shaped sealing strip (23) is clamped with the corresponding arc-shaped sealing groove (33).

2. A new type butterfly valve for preventing butterfly plate damage as claimed in claim 1, characterized in that: A toothed disc (6) is fixedly mounted on the valve body (1), and the toothed disc (6) is rotationally connected to the valve stem (4).

3. A new type butterfly valve for preventing butterfly plate damage as claimed in claim 2, characterized in that: A handle (7) is fixedly mounted on the top end of the valve stem (4), and the handle (7) is rotatably connected to the toothed disc (6).

4. A novel butterfly valve for preventing butterfly plate damage as claimed in claim 1, characterized in that: The valve seat (2) is provided with an axial hole (24) extending therethrough; the valve stem (4) and the pivot shaft (5) are rotatably mounted in the corresponding axial hole (24).

5. A new type butterfly valve for preventing butterfly plate damage as claimed in claim 4, characterized in that: An integral valve stem hole seat (31) is provided on the circumferential surface above the butterfly plate (3), and an integral pivot hole seat (32) is provided on the circumferential surface below the butterfly plate (3); the bottom end of the valve stem (4) is fixedly connected to the valve stem hole seat (31); and the top end of the pivot (5) is rotatably connected to the pivot hole seat (32).

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