Symmetrical sealing ring and eccentric butterfly valve thereof

Abstract

The symmetrical sealing ring comprises a body of an annular structure, a first sealing conical surface and a second sealing conical surface which are used for being attached to a valve seat are arranged on the peripheral wall of the body, and the first sealing conical surface and the second sealing conical surface are symmetrically arranged about the center line. The center line is perpendicular to the axis of the body. The sealing ring is provided with a first sealing conical surface and a second sealing conical surface which are symmetrically arranged, the vertical center line is located in the middle of the thickness of the body, and when the first sealing conical surface attached to the valve seat is damaged, only the body needs to be turned over to be installed, the second sealing conical surface makes sealing contact with the valve seat, and flow closure of the butterfly valve on a circulating medium is achieved. In this way, the machining period of the sealing ring is shortened, the replacement time of the sealing ring is shortened, and meanwhile the maintenance efficiency of the sealing ring is improved.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a symmetrical sealing ring and an eccentric butterfly valve thereof. Background Art

[0002] like Figure 1 As shown in the figure, ordinary three-eccentric and four-eccentric butterfly valves need to be completely disassembled and the valve plate sealing rings need to be remade during maintenance due to damage to the valve plate sealing rings. The production of valve plate sealing rings requires a long processing cycle, which cannot meet the maintenance period for valves in some important positions. The valves can only operate with defects, which poses a hidden danger to production.

[0003] In summary, how to reduce the replacement time of the sealing ring and improve the maintenance efficiency of the sealing ring has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to reduce the replacement time of the sealing ring and improve the maintenance efficiency of the sealing ring;

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The utility model is a symmetrical sealing ring, comprising: a body of an annular structure, wherein the outer peripheral wall of the body is provided with a first sealing cone surface and a second sealing cone surface for contacting a valve seat, wherein the first sealing cone surface and the second sealing cone surface are symmetrically arranged about a center line, and the center line is perpendicular to the axis of the body;

[0007] Compared with the traditional sealing ring which only has one sealing cone surface, the sealing ring in this solution has a first sealing cone surface and a second sealing cone surface which are symmetrically arranged, and the vertical center line is located in the middle of the thickness of the body. When the first sealing cone surface which is in contact with the valve seat is damaged, it is only necessary to turn the body over and install the second sealing cone surface so as to make the second sealing cone surface seal in contact with the valve seat to realize the interception of the circulating medium by the butterfly valve. This reduces the processing cycle of the sealing ring, reduces the replacement time of the sealing ring and improves the maintenance efficiency of the sealing ring.

[0008] In order to facilitate the positioning of the sealing ring during the installation process, the utility model adopts a positioning hole that is opened through the body along the axis direction of the body;

[0009] In this solution, since the main body is an eccentric structure, in order to adapt the main body to the valve plate with an eccentric structure, a positioning hole needs to be opened, so that the shapes of the main body and the valve plate match and the installation of the sealing ring is realized; if there is no positioning hole, the valve plate and the sealing ring need to be pre-matched, and then the sealing ring needs to be rotated to match the shape of the sealing ring with the valve plate.

[0010] The present invention also discloses an eccentric butterfly valve, comprising: a symmetrical sealing ring; a valve plate connected to a rotating shaft; a pressure plate connected to an end face of the valve plate and forming a receiving cavity for accommodating the sealing ring between the pressure plate and an outer peripheral arm of the valve plate; and a fastener that securely connects the pressure plate and the valve plate.

[0011] In this solution, fasteners connect the pressure plate and the valve plate, forming an accommodating cavity between the pressure plate and the valve plate, and the sealing ring is installed in the accommodating cavity. During the operation of the butterfly valve, the first sealing cone surface of the sealing ring contacts the valve seat to play a sealing role; when the first sealing cone surface is damaged, the pressure plate and the valve plate are separated, the sealing ring is turned over and installed on the valve plate, and the pressure plate and the valve plate are fixedly connected. At this time, the second sealing cone surface contacts the valve seat to play a sealing role.

[0012] In order to facilitate the positioning of the sealing ring, the utility model adopts a horizontal positioning pin provided in the accommodating cavity and matched with the positioning hole;

[0013] The positioning hole is matched with the positioning pin, so that the sealing ring can be positioned with the accommodating cavity, which is convenient for the rapid positioning of the sealing ring when it is turned over, and then the pressure plate, valve plate and sealing ring can be quickly fixed and connected.

[0014] The beneficial effects of the utility model are as follows: the utility model is a symmetrical sealing ring and an eccentric butterfly valve thereof, the sealing ring having a first sealing cone surface and a second sealing cone surface symmetrically arranged, the vertical center line of which is located in the middle of the thickness of the body; when the first sealing cone surface which abuts the valve seat is damaged, it is only necessary to turn the body over and install the second sealing cone surface so as to make the second sealing cone surface seal in contact with the valve seat, thereby realizing the interception of the circulating medium by the butterfly valve, thereby reducing the processing cycle of the sealing ring, reducing the replacement time of the sealing ring and improving the maintenance efficiency of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the traditional sealing ring structure;

[0017] Figure 2 This is a schematic diagram of the sealing ring structure of the utility model;

[0018] Figure 3 yes Figure 2 A magnified view of point A;

[0019] Figure 4 It is a structural diagram of the valve plate, sealing ring and pressure ring;

[0020] Figure 5 It is a structural diagram of a butterfly valve;

[0021] Figure 6 yes Figure 5Enlarged view of point B;

[0022] In the figure: 01-center line, 1-sealing ring, 10-body, 11-first sealing cone surface, 12-second sealing cone surface, 13-positioning hole, 2-valve plate, 3-pressure plate, 4-valve seat, 5-fastener, 6-positioning pin. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0024] like Figure 2 As shown, the utility model is a symmetrical sealing ring 1, comprising: a body 10 of an annular structure, wherein the outer peripheral wall of the body 10 is provided with a first sealing cone surface 11 and a second sealing cone surface 12 for contacting the valve seat 4, wherein the first sealing cone surface 11 and the second sealing cone surface 12 are symmetrically arranged about a center line 01, and the center line 01 is perpendicular to the axis of the body 1;

[0025] Compared with the traditional sealing ring which has only one sealing cone surface, the sealing ring 1 in this solution has a symmetrically arranged first sealing cone surface 11 and a second sealing cone surface 12, and the vertical center line 01 is located in the middle of the thickness of the body 10. When the first sealing cone surface 11 that is in contact with the valve seat 4 is damaged, it is only necessary to turn the body 10 over and install it, and make the second sealing cone surface 12 seal in contact with the valve seat 4 to realize the interception of the circulating medium by the butterfly valve. This reduces the processing cycle of the sealing ring 1, reduces the replacement time of the sealing ring 1, and improves the maintenance efficiency of the sealing ring 1.

[0026] like Figure 2 As shown, in order to facilitate the positioning of the sealing ring during the installation process, the utility model adopts a positioning hole 13 that is opened on the main body 10 along the axis direction of the main body 10;

[0027] like Figure 2-6 As shown, in this solution, since the body is an eccentric structure, in order to adapt the body 10 to the valve plate of the eccentric structure, a positioning hole 13 needs to be opened, so that the body 10 and the valve plate match each other in shape, and the sealing ring 1 can be installed; if there is no positioning hole 13, the valve plate and the sealing ring 1 need to be pre-fitted, and then the sealing ring 1 needs to be rotated to match the shape of the sealing ring 1 with the valve plate;

[0028] The axis of the positioning hole 13 is parallel to the axis of the body 10 , which facilitates repositioning of the body 10 after turning it over.

[0029] This solution also discloses an eccentric butterfly valve, comprising: a symmetrical sealing ring 1; a valve plate 2 connected to a rotating shaft; a pressure plate 3 connected to the end surface of the valve plate 2 and forming a receiving cavity for accommodating the sealing ring 1 between the pressure plate 3 and the outer peripheral arm of the valve plate 2; and a fastener 5 that securely connects the pressure plate 3 and the valve plate 2.

[0030] In this solution, the fastener 5 connects the pressure plate 3 and the valve plate 2, and an accommodating cavity is formed between the pressure plate 3 and the valve plate 2. The sealing ring 1 is installed in the accommodating cavity. During the operation of the butterfly valve, the first sealing cone surface 11 of the sealing ring 1 contacts the valve seat 3 to play a sealing role; when the first sealing cone surface 11 is damaged, the pressure plate 3 and the valve plate 2 are separated, the sealing ring 1 is turned over and installed on the valve plate 2, and the pressure plate 3 and the valve plate 2 are fixedly connected. At this time, the second sealing cone surface 12 contacts the valve seat 4 to play a sealing role.

[0031] like Figure 4 As shown, in order to facilitate the positioning of the sealing ring, the utility model adopts a horizontal positioning pin 6 provided in the accommodating cavity and matched with the positioning hole 13;

[0032] The positioning hole 13 is matched with the positioning pin 6, so that the sealing ring 1 can be positioned with the accommodating cavity, which facilitates the rapid positioning of the sealing ring 1 when it is turned over, and then quickly fixes the pressure plate 3, the valve plate 2 and the sealing ring 1 together.

[0033] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A symmetrical sealing ring, characterized in that: include: The main body has an annular structure, and a first sealing cone surface and a second sealing cone surface for fitting the valve seat are provided on the outer peripheral wall of the main body, wherein the first sealing cone surface and the second sealing cone are symmetrically arranged about a center line, and the center line is perpendicular to the axis of the main body.

2. A symmetrical sealing ring according to claim 1, characterized in that: A positioning hole is provided through the main body along the axis direction of the main body.

3. An eccentric butterfly valve, comprising a symmetrical sealing ring according to any one of claims 1 to 2, characterized in that: Also includes: a valve plate connected to the rotating shaft; A pressure plate connected to the end surface of the valve plate and forming an accommodating cavity for accommodating the sealing ring between the pressure plate and the outer peripheral arm of the valve plate; A fastener is used to securely connect the pressure plate and the valve plate.

4. The eccentric butterfly valve according to claim 3, characterized in that: A horizontal positioning pin is provided in the accommodating cavity and matches the positioning hole.

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