Valve plate structure of double-eccentric butterfly valve

Abstract

The valve plate structure of the double-eccentric butterfly valve comprises a valve rod, a butterfly valve body and a valve plate, the valve plate is arranged on one side, deviating from the center, of an inner cavity of the butterfly valve body, a threaded sleeve is arranged in the middle of the back side of the valve plate through a locking lug, the valve rod is arranged in the threaded sleeve, a compression-resistant strip is arranged in the middle of the front face of the valve plate, and the compression-resistant strip is arranged in the middle of the back side of the valve plate. A connecting shaft is arranged in the middle of the upper end and the lower end of the valve plate. The anti-pressure butterfly valve is provided with the valve plate, the anti-pressure strip is arranged in the middle of the front face of the valve plate, the side wings are arranged on the two sides of the anti-pressure strip, the anti-pressure protection capacity of the valve plate can be improved through the anti-pressure strip and the side wings, the connecting shafts are arranged at the two ends of the valve plate, and the valve plate can be rotationally connected with the eccentric position of the middle of the butterfly valve body through the connecting shafts. A threaded sleeve is arranged in the middle of the back side of the valve plate, an inner threaded cavity is formed in the middle of the threaded sleeve, a screw rod is arranged at the end of the valve rod, and the screw rod can be in transmission control with a screw rod of the inner threaded cavity, so that the valve rod can be subjected to lifting control.

Description

Technical Field

[0001] The utility model relates to the field of valve plates, in particular to a valve plate structure of a double eccentric butterfly valve. Background Art

[0002] Double eccentric butterfly valves, also known as high-performance butterfly valves, are primarily used for drainage systems in water plants, power plants, steel mills, chemical plants, water source projects, and environmental facility construction. They are particularly suitable for use as regulating and intercepting devices in water pipelines. Compared to centerline butterfly valves, double eccentric butterfly valves are more resistant to high pressures, have a longer lifespan, and offer better stability.

[0003] For example, the authorized patent with publication number CN221120937U (double eccentric butterfly valve for easy flow adjustment) includes a double eccentric butterfly valve body, a control valve stem fixedly installed on the top of the double eccentric butterfly valve body, and an adjustment assembly arranged on the side wall of the double eccentric butterfly valve body, the adjustment assembly includes an adjustment mechanism installed on the side wall of the double eccentric butterfly valve body, one end of the adjustment mechanism is connected to one end of the control valve stem, and the other end of the adjustment mechanism is located on the inner wall of the double eccentric butterfly valve body, an auxiliary mechanism is installed on the inner wall of the double eccentric butterfly valve body, and the auxiliary mechanism is located on the right side of the adjustment mechanism. The utility model solves the problem that the existing double eccentric butterfly valve can control the flow and stop of water, but it is difficult for operators to adjust the speed of the water flow through the double eccentric butterfly valve, which is not convenient for operators to better use the double eccentric butterfly valve;

[0004] The valve plate and valve stem of the above-mentioned prior art are not convenient to install and disassemble, and the valve stem cannot be raised or lowered. The installation and fixation are not versatile enough, and the valve plate has insufficient anti-deformation protection ability and insufficient protection effect. Utility Model Content

[0005] The purpose of the present utility model is to provide a valve plate structure for a double eccentric butterfly valve to solve the problems proposed in the above background technology that the installation and disassembly of the valve plate and the valve stem are not convenient, the valve stem cannot be raised and lowered, the installation and fixation are not versatile enough, and the valve plate has insufficient anti-deformation protection ability and insufficient protection effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve plate structure of a double eccentric butterfly valve, comprising a valve stem, a butterfly valve body and a valve plate, wherein the valve plate is arranged on the eccentric side of the inner cavity of the butterfly valve body, a threaded sleeve is provided in the middle of the back side of the valve plate through a locking ear, the valve stem is arranged inside the threaded sleeve, a pressure-resistant strip is provided in the center of the front side of the valve plate, and a connecting shaft is provided in the center of the upper and lower ends of the valve plate.

[0007] In a further embodiment, the anti-compression strip and the valve plate are integrally formed, and both sides of the anti-compression strip are provided with side wings with convex structures, and the ends of the side wings are welded and fixed to the front side of the valve plate.

[0008] In a further embodiment, an internal threaded cavity is provided inside the threaded sleeve, a screw is provided at the end of the valve stem, and the screw is controlled by the internal threaded cavity lead screw.

[0009] In a further embodiment, a valve port is provided in the middle of the butterfly valve body, and an inner side wall of the valve port is provided with a wear-resistant layer and a rubber pad.

[0010] In a further embodiment, inner shaft holes are provided at both ends of the inner side of the valve port, and the connecting shaft is rotatably connected to the inner shaft holes.

[0011] In a further embodiment, the anti-compression strip is configured as a solid structure, and the anti-compression strip and the side wings are configured as an integral structure.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model is provided with a valve plate, a pressure-resistant strip is provided in the middle of the front of the valve plate, and side wings are provided on both sides of the pressure-resistant strip. The pressure-resistant protection capability of the valve plate can be improved by the pressure-resistant strip and the side wings. Connecting shafts are provided at both ends of the valve plate, and the valve plate can be rotatably connected to the middle eccentric part of the butterfly valve body through the connecting shaft.

[0014] 2. A threaded sleeve is provided in the middle of the back side of the valve plate of this utility model, an internal threaded cavity is provided in the middle of the threaded sleeve, and a screw is provided at the end of the valve stem. The screw can be driven and controlled by the internal threaded cavity lead screw, so that the valve stem can be controlled to rise and fall. Locking ears are provided at both ends of the threaded sleeve, and the locking ears facilitate the bolt fixation of the threaded sleeve and the valve plate, making installation and disassembly convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a valve plate structure of a double eccentric butterfly valve of the present invention;

[0016] Figure 2 This is a side view of the valve plate of the utility model;

[0017] Figure 3 This is a top view of the valve plate of the utility model;

[0018] Figure 4 This is the front view of the valve plate of the utility model;

[0019] Figure 5 This is a structural diagram of part A of the utility model.

[0020] In the figure: 1. Valve stem; 2. Butterfly valve body; 3. Valve plate; 4. Threaded sleeve; 5. Locking ear; 6. Connecting shaft; 7. Side wing; 8. Anti-pressure strip; 9. Screw; 10. Internal thread cavity. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figure 1-5 The utility model provides an embodiment: a valve plate structure of a double eccentric butterfly valve, including a valve stem 1, a butterfly valve body 2 and a valve plate 3. The valve plate 3 is arranged on the side eccentric to the center of the inner cavity of the butterfly valve body 2. A threaded sleeve 4 is provided in the middle of the back side of the valve plate 3 through a locking ear 5. The valve stem 1 is arranged inside the threaded sleeve 4. A pressure-resistant strip 8 is provided in the center of the front of the valve plate 3, and a connecting shaft 6 is provided in the center of the upper and lower ends of the valve plate 3; the butterfly valve body 2 is opened and closed and the flow is controlled by the valve plate 3, and the threaded sleeve 4 and the valve plate 3 are conveniently threadedly fixed by the locking ear 5. The valve plate 3 can be protected against pressure by the pressure-resistant strip 8, and the valve plate 3 and the butterfly valve body 2 are rotatably installed by the connecting shaft 6.

[0023] The anti-compression strip 8 and the valve plate 3 are configured as an integral structure, and side wings 7 with convex structures are provided on both sides of the anti-compression strip 8, and the ends of the side wings 7 are welded and fixed to the front of the valve plate 3. The anti-compression strip 8 and the side wings 7 are used to enhance the protection capability of the valve plate 3. The anti-compression strip 8 is configured as a solid structure, and the anti-compression strip 8 and the side wings 7 are configured as an integral structure. The anti-compression strip 8 and the side wings 7 of this design can enhance the compressive strength.

[0024] An internal threaded cavity 10 is provided inside the threaded sleeve 4, and a screw 9 is provided at the end of the valve stem 1. The screw 9 and the internal threaded cavity 10 are controlled by screw transmission. The internal threaded cavity 10 is used to control the screw 9 by screw transmission, so that the height of the valve stem 1 can be adjusted.

[0025] A valve port is provided in the middle of the butterfly valve body 2, and the inner wall of the valve port is provided with a wear-resistant layer and a rubber pad. The wear-resistant layer and the rubber pad can provide wear-resistant protection for the inner wall of the butterfly valve body 2; inner shaft holes are provided at both ends of the inner side of the valve port, and the connecting shaft 6 is rotatably connected to the inner shaft hole, which facilitates the rotation installation of the connecting shaft 6 through the inner shaft hole.

[0026] Working principle: When in use, the threaded sleeve 4 is fixed to the back bolt of the valve plate 3 through the locking ear 5, and the end of the valve stem 1 is controlled by the screw 9 and the internal threaded cavity 10 screw drive, so that the valve stem 1 can be installed and adjusted up and down at the same time. The rotation of the valve stem 1 drives the valve plate 3 to rotate. The rotation of the valve plate 3 can control the opening and closing and flow of the valve body, and the connecting shafts 6 at both ends of the valve plate 3 are rotatably connected to the valve port. The front of the valve plate 3 can be protected against pressure by the anti-pressure strip 8 and the side wing 7, so that the anti-deformation ability of the valve plate 3 can be enhanced.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A valve plate structure of a double eccentric butterfly valve, comprising a valve stem (1), a butterfly valve body (2) and a valve plate (3), characterized in that: The valve plate (3) is arranged on a side eccentric to the inner cavity of the butterfly valve body (2); a threaded sleeve (4) is provided in the middle of the back side of the valve plate (3) through a locking ear (5); the valve stem (1) is arranged inside the threaded sleeve (4); a pressure-resistant strip (8) is provided in the center of the front side of the valve plate (3); and a connecting shaft (6) is provided in the center of the upper and lower ends of the valve plate (3).

2. The valve plate structure of a double eccentric butterfly valve according to claim 1, characterized in that: The anti-compression strip (8) and the valve plate (3) are integrally formed, and both sides of the anti-compression strip (8) are provided with side wings (7) with an outwardly convex structure, and the ends of the side wings (7) are welded and fixed to the front face of the valve plate (3).

3. The valve plate structure of a double eccentric butterfly valve according to claim 1, characterized in that: An internal threaded cavity (10) is provided inside the threaded sleeve (4), a screw rod (9) is provided at the end of the valve stem (1), and the screw rod (9) and the internal threaded cavity (10) are controlled by screw transmission.

4. The valve plate structure of a double eccentric butterfly valve according to claim 1, characterized in that: A valve port is provided in the middle of the butterfly valve body (2), and an inner side wall of the valve port is provided with a wear-resistant layer and a rubber pad.

5. The valve plate structure of a double eccentric butterfly valve according to claim 4, characterized in that: Both ends of the inner side of the valve port are provided with inner shaft holes, and the connecting shaft (6) is rotatably connected to the inner shaft holes.

6. The valve plate structure of a double eccentric butterfly valve according to claim 1, characterized in that: The anti-compression strip (8) is configured as a solid structure, and the anti-compression strip (8) and the side wings (7) are configured as an integral structure.

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