Butterfly valve with good sealing performance

Abstract

The utility model discloses a butterfly valve with good sealing performance, which belongs to the technical field of valves and comprises a valve body, a valve rod is rotatably connected to the bottom of an inner cavity of the valve body, fixing sleeves are arranged at the top and the bottom of the outer side of the valve rod, butterfly plates are arranged on the rear sides of the fixing sleeves at the top and the bottom, and the butterfly plates are connected with the valve rod. Positioning bolts are arranged on the left sides and the right sides of the front sides of the fixing sleeves at the top and the bottom, a third sealing ring is fixedly installed on the outer side of the front side of the butterfly plate, a second sealing ring is arranged on the rear side of the butterfly plate, a pressing plate is arranged on the rear side of the second sealing ring, and a first sealing ring is fixedly installed on the outer side of the rear side of the pressing plate; a first baffle is fixedly installed on the left side of an inner cavity of the valve body, and a second baffle is fixedly installed on the right side of the inner cavity of the valve body. According to the butterfly valve, the sealing performance of the butterfly valve is improved, the sealing reliability of the whole butterfly valve is guaranteed, a worker can replace or maintain the butterfly plate conveniently, and the practicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially relates to a butterfly valve with good sealing property. BACKGROUND

[0002] The butterfly valve is a commonly used pipeline control device, and is widely applied to petroleum, chemical industry, water treatment and other fields, which controls the on-off and flow of the pipeline through the rotation of the butterfly plate.

[0003] The conventional butterfly valve is not ideal in sealing performance in the use process, and is prone to leakage, which influences the normal operation of the pipeline system, and is inconvenient to disassemble, maintain or replace the butterfly plate, thereby reducing the practicability of the device. UTILITY MODEL CONTENT

[0004] The utility model discloses a butterfly valve with good sealing property, which solves the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A butterfly valve with good sealing property, comprising a valve body, a valve rod rotatably connected to the bottom of the inner cavity of the valve body, a fixed sleeve provided on the top and bottom of the outer side of the valve rod, a butterfly plate provided on the rear side of the fixed sleeve on the top and bottom, a positioning bolt provided on the left and right sides of the front side of the fixed sleeve on the top and bottom, a third sealing ring fixedly installed on the outer side of the front side of the butterfly plate, a second sealing ring provided on the rear side of the butterfly plate, a pressing plate provided on the rear side of the second sealing ring, a first sealing ring fixedly installed on the outer side of the rear side of the pressing plate, a first baffle fixedly installed on the left side of the inner cavity of the valve body, and a second baffle fixedly installed on the right side of the inner cavity of the valve body.

[0007] Preferably, the rear side of the positioning bolt is threaded through the fixed sleeve and extends to the inside of the butterfly plate, the front side of the third sealing ring is in contact with the rear side of the first baffle, and the rear side of the first sealing ring is in contact with the front side of the second baffle.

[0008] Preferably, the rear side of the pressing plate is provided with a plurality of locking bolts, the front side of the locking bolt is threaded through the pressing plate and extends to the inside of the butterfly plate, and the locking bolts are arranged in an annular array.

[0009] Preferably, the top of the valve body is provided with an electric mechanism, the bottom of the outer side of the electric mechanism is provided with a second connecting flange, the top of the outer side of the valve body is provided with a first connecting flange, and the output end of the electric mechanism is fixedly connected with the valve rod.

[0010] Preferably, the outer side of the top of the second connecting flange is provided with a stud, the bottom of the stud is threaded through the second connecting flange and the first connecting flange, and the first connecting flange is provided with a hexagonal nut matched with the stud.

[0011] Preferably, the bottom of the valve body is fixedly installed with a lower end cover through a fixing bolt.

[0012] Compared with the prior art, the butterfly valve has the advantages that:

[0013] In the utility model, the second sealing ring is arranged at the back side of the butterfly plate, and is fixed by the pressing plate and the locking bolt, thereby forming a reliable sealing structure and improving the sealing performance of the butterfly valve.

[0014] In the utility model, the positioning bolt is away from the butterfly plate by rotating, and then the butterfly plate can be separated from the fixing sleeve, and the butterfly plate can be removed, so that the staff can replace or maintain the butterfly plate, and the practicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective structural schematic view of the butterfly valve with good sealing performance;

[0016] Figure 2 It is a rear view structural schematic view of the butterfly valve with good sealing performance;

[0017] Figure 3 It is a partial structural sectional view of the butterfly valve with good sealing performance;

[0018] Figure 4 It is a partial structural bottom view of the butterfly valve with good sealing performance;

[0019] Figure 5 It is Figure 3 A partial enlarged view of part A.

[0020] In the drawing: 1, valve body; 2, electric mechanism; 3, valve rod; 4, fixing sleeve; 5, first baffle; 6, second baffle; 7, first sealing ring; 8, pressing plate; 9, second sealing ring; 10, butterfly plate; 11, third sealing ring; 12, positioning bolt; 13, lower end cover; 14, locking bolt; 15, first connecting flange; 16, second connecting flange; 17, stud; 18, hexagonal nut. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are merely part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Referring to Figures 1-5 A butterfly valve with good sealing performance, including valve body 1, the bottom of the inner cavity of valve body 1 is rotatably connected with valve rod 3, the top and bottom of the outer side of valve rod 3 are provided with fixed sleeve 4, the rear side of fixed sleeve 4 of the top and bottom is provided with butterfly plate 10, the left and right sides of the front side of fixed sleeve 4 of the top and bottom are provided with positioning bolt 12, the outer side of the front side of butterfly plate 10 is fixedly installed with third sealing ring 11, the rear side of butterfly plate 10 is provided with second sealing ring 9, the rear side of second sealing ring 9 is provided with pressing plate 8, the outer side of the rear side of pressing plate 8 is fixedly installed with first sealing ring 7, the left side of the inner cavity of valve body 1 is fixedly installed with first baffle 5, the right side of the inner cavity of valve body 1 is fixedly installed with second baffle 6, valve body 1 is made of stainless steel, the outer surface is precisely machined, and the surface is smooth and has low roughness.

[0023] In the embodiment, the rear side of positioning bolt 12 is threaded through fixed sleeve 4 and is threadedly extended to the inside of butterfly plate 10, the front side of third sealing ring 11 is in contact with the rear side of first baffle 5, the rear side of first sealing ring 7 is in contact with the front side of second baffle 6, the rear side of pressing plate 8 is provided with multiple groups of locking bolts 14, the front side of locking bolt 14 is threaded through pressing plate 8 and is threadedly extended to the inside of butterfly plate 10, locking bolt 14 is arranged in an annular array, first sealing ring 7 and third sealing ring 11 are both made of rubber material, have good elasticity and wear resistance, and can form a tight seal between butterfly plate 10 and valve body 1.

[0024] In the embodiment, the top of valve body 1 is provided with electric mechanism 2, the bottom of the outer side of electric mechanism 2 is provided with second connecting flange 16, the top of the outer side of valve body 1 is provided with first connecting flange 15, the output end of electric mechanism 2 is fixedly connected with valve rod 3, the outer side of the top of second connecting flange 16 is provided with double-headed stud 17, the bottom of double-headed stud 17 is threadedly penetrated through second connecting flange 16 and first connecting flange 15, first connecting flange 15 is provided with hexagonal nut 18 matched with double-headed stud 17, the bottom of valve body 1 is fixedly installed with lower end cover 13 through fixing bolt, first connecting flange 15 and second connecting flange 16 can be fixed through the cooperation of double-headed stud 17 and hexagonal nut 18, and the use stability of electric mechanism 2 is improved.

[0025] In the embodiment, when the butterfly valve needs to be opened in use, the valve rod 3 is driven to rotate by the electric mechanism 2, the valve rod 3 drives the butterfly plate 10 to rotate, the first sealing ring 7 is away from the second baffle 6, the second sealing ring 9 is away from the first baffle 5, and the medium can pass through the valve body 1; when the butterfly valve needs to be closed, the valve rod 3 is reversely driven to rotate by the electric mechanism 2, the butterfly plate 10 is reset to rotate to the closed position, the positioning bolt 12 is away from the butterfly plate 10 by the positive rotation positioning bolt 12, then the butterfly plate 10 can be separated from the fixed sleeve 4, the butterfly plate 10 can be taken down, and the butterfly plate 10 can be replaced or maintained by the staff.

[0026] The butterfly valve with good sealing performance is described in detail. The principle and implementation of the utility model are described by applying specific examples. The above examples are only used to help understand the method and core idea of the utility model. It should be pointed out that the ordinary skilled in the art can make some improvements and modifications to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A butterfly valve with good sealing performance, comprising a valve body (1), characterized in that: A valve stem (3) is rotatably connected to the bottom of the inner cavity of the valve body (1). A fixing sleeve (4) is provided at the top and bottom of the outer side of the valve stem (3). A butterfly plate (10) is provided on the rear side of the fixing sleeve (4) at the top and bottom. A positioning bolt (12) is provided on the left and right sides of the front side of the fixing sleeve (4) at the top and bottom. A third sealing ring (11) is fixedly installed on the outer side of the front side of the butterfly plate (10). A second sealing ring (9) is provided on the rear side of the butterfly plate (10). A pressure plate (8) is provided on the rear side of the second sealing ring (9). A first sealing ring (7) is fixedly installed on the outer side of the rear side of the pressure plate (8). A first baffle (5) is fixedly installed on the left side of the inner cavity of the valve body (1). A second baffle (6) is fixedly installed on the right side of the inner cavity of the valve body (1).

2. The butterfly valve with good sealing performance according to claim 1, characterized in that: The rear thread of the positioning bolt (12) passes through the fixing sleeve (4) and extends into the interior of the butterfly plate (10). The front side of the third sealing ring (11) contacts the rear side of the first baffle (5), and the rear side of the first sealing ring (7) contacts the front side of the second baffle (6).

3. The butterfly valve with good sealing performance according to claim 1, characterized in that: Multiple sets of locking bolts (14) are provided on the rear side of the pressure plate (8). The front thread of the locking bolts (14) penetrates the pressure plate (8) and extends into the interior of the butterfly plate (10). The locking bolts (14) are arranged in a ring array.

4. The butterfly valve with good sealing performance according to claim 1, characterized in that: The valve body (1) is provided with an electric mechanism (2) at the top. The bottom fixing sleeve (4) on the outside of the electric mechanism (2) is provided with a second connecting flange (16). The top fixing sleeve (4) on the outside of the valve body (1) is provided with a first connecting flange (15). The output end of the electric mechanism (2) is fixedly connected to the valve stem (3).

5. A butterfly valve with good sealing performance according to claim 4, characterized in that: A double-ended stud (17) is provided on the outer side of the top of the second connecting flange (16). The bottom thread of the double-ended stud (17) passes through the second connecting flange (16) and the first connecting flange (15). The first connecting flange (15) is provided with a hexagonal nut (18) that is compatible with the double-ended stud (17).

6. A butterfly valve with good sealing performance according to claim 1, characterized in that: The bottom of the valve body (1) is fixedly installed with a lower end cover (13) by fixing bolts.

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