Butterfly valve structure with sealing ring convenient to disassemble and assemble

Abstract

The butterfly valve structure comprises a valve body, a valve cavity is formed in the valve body, the sealing ring is arranged on the inner wall of the circumference of the valve cavity, and the butterfly valve structure is characterized in that a sinking groove is formed in one side of the valve body along the outline of the edge of the valve cavity, a sealing cover is detachably connected in the sinking groove, and the sealing ring is arranged in the sinking groove. The sealing ring is clamped between the valve body and the sealing cover, a limiting flange is arranged on the side, facing the valve cavity, of the sealing cover along the edge contour, and a limiting groove capable of being matched with the limiting flange in a clamped mode is formed in one side of the sealing ring in an inwards-concave mode. The sealing cover is provided with an ejection component which can elastically stretch out and draw back to protrude out of one side of the sealing cover to enable the sealing ring to be separated from the limiting flange. The limiting flange of the sealing cover is connected with the limiting groove of the sealing ring in a clamped mode to achieve pre-positioning of the sealing ring, then the sealing ring is clamped and fixed when the sealing cover is installed and fixed to the valve body, anti-disengaging fixing of the sealing ring is achieved, and the defect that the sealing ring is prone to disengaging is effectively overcome.

Description

Technical Field

[0001] The utility model relates to a butterfly valve structure with a sealing ring that is convenient to disassemble and assemble. Background Art

[0002] In drinking water and seawater media, rubber lined butterfly valves are being adopted by more and more projects due to their excellent anti-corrosion performance and high cost performance. The structure of the rubber lined butterfly valve is a butterfly valve that is lined with a layer of rubber on the surface of the valve body and butterfly plate that contacts the medium to prevent the medium from contacting the metal surface.

[0003] The structure of the butterfly plate seal ring without rubber lining is that a narrow groove is processed on the butterfly plate and the seal ring pressure plate, and there are bosses on both sides of the butterfly plate seal ring, which are pressed into the groove for fixing. However, due to the limitation of the rubber lining process of the rubber lined butterfly valve, it is impossible to line the rubber in the relatively narrow groove, resulting in the inability to make a groove on the butterfly plate to install the butterfly plate seal ring as before. The existing technology only makes the butterfly plate seal ring in the form of a flat seal ring, and this type of butterfly plate seal ring is completely fixed by the friction generated by the butterfly plate and the seal ring pressure plate when the pressure plate screws are tightened.

[0004] However, the sealing ring of this structure may fall off in its entirety. The reason is that the flat sealing ring is fixed between the butterfly plate and the sealing ring pressing plate entirely by friction. After use, it becomes hard due to aging, resulting in a smaller friction coefficient. During the opening and closing process of the butterfly valve, the friction of the valve body sealing ring pulls the flat sealing ring out from between the butterfly plate and the sealing ring pressing plate, causing it to fall off. Utility Model Content

[0005] In view of the defects of the prior art, the technical problem to be solved by the utility model is to provide a butterfly valve structure which is sealed and easy to assemble and disassemble.

[0006] A butterfly valve structure with convenient disassembly and assembly of a sealing ring, comprising a valve body, a valve cavity formed in the valve body, a sealing ring arranged along the circumferential inner wall of the valve cavity, and characterized in that: a recessed groove is arranged along the edge contour of the valve cavity on one side of the valve body, a sealing cover is detachably connected in the recessed groove, the sealing ring is clamped between the valve body and the sealing cover, a limiting flange is arranged along the edge contour of the sealing cover on the side facing the valve cavity, a limiting groove is concave on one side of the sealing ring and can be snap-fitted with the limiting flange, and a ejection component is arranged on the sealing cover and can elastically extend and bulge outward on one side thereof to cause the sealing ring to separate from the limiting flange.

[0007] In one embodiment, the ejection component includes a movable pressure plate and a push rod, the movable pressure plate is elastically and movably arranged on one side of the sealing cover, the sealing cover is located on the side opposite to the limiting flange and is provided with a plurality of through holes at intervals along the circumference, the through holes penetrate the limiting flange, the push rod is arranged on one side of the movable pressure plate and is arranged one by one in the through holes, and the push rod can move with the movable pressure plate and protrude outward on one side of the through holes.

[0008] In one embodiment, a concave cavity is provided on the side of the sealing cover opposite to the limiting flange, the movable pressure plate is movably provided in the concave cavity, and a spring is provided between the bottom wall of the concave cavity and the movable pressure plate.

[0009] In one embodiment, the cross-sectional profile of the limiting flange is in the shape of a major arc, and the cross-sectional profile of the limiting groove is the same as the cross-sectional profile of the limiting flange.

[0010] In one embodiment, the sealing cover is fixed in the sink by bolts and clamps the sealing ring.

[0011] In one embodiment, an internal thread is provided along the circumference of the inner side of the sink, and the sealing cover is threadedly connected in the sink.

[0012] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0013] The utility model realizes the pre-positioning of the sealing ring by clamping the limiting flange of the sealing cover with the limiting groove of the sealing ring, and then clamps the sealing ring when the sealing cover is installed and fixed to the valve body to realize the anti-dropping fixation of the sealing ring, effectively avoiding the disadvantage that the sealing ring is easy to loosen;

[0014] When the sealing ring needs to be disassembled for maintenance or replacement, after the sealing cover is removed from the valve body, the ejection member can be manually pressed to make the ejection member protrude out of the sealing cover and press against the sealing ring, thereby driving the sealing ring to move relatively in a direction away from the limiting flange, causing the limiting groove of the sealing ring to disengage from the limiting position of the sealing cover, thereby achieving the effect of convenient disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of a butterfly valve structure with a sealing ring that is easy to disassemble and assemble in one embodiment of the utility model;

[0016] Figure 2 In one embodiment of the utility model Figure 1 A magnified schematic diagram of point A;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a butterfly valve structure with a sealing ring that is easy to disassemble and assemble in one embodiment of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0019] like Figures 1 to 3The embodiment of the utility model shown preferably provides a butterfly valve structure with convenient disassembly and assembly of the sealing ring, including a valve body 1, a valve cavity 2 is formed in the valve body 1, a sealing ring 5 is arranged along the circumferential inner wall of the valve cavity 2, a recessed groove 6 is arranged along the edge contour of the valve cavity 2 on one side of the valve body 1, a sealing cover 7 is detachably connected to the recessed groove 6, the sealing ring 5 is clamped between the valve body 1 and the sealing cover 7, a limiting flange 8 is arranged along the edge contour of the sealing cover 7 on the side facing the valve cavity 2, a limiting groove 9 is concave on one side of the sealing ring 5 and can be snap-fitted with the limiting flange 8, and a ejection member 10 is arranged on the sealing cover 7 and can elastically extend and bulge outward on one side thereof to cause the sealing ring 5 to separate from the limiting flange 8.

[0020] Specifically, the sealing ring deforms elastically so that the limiting groove on the sealing ring can be deformed and fixedly sleeved on the limiting flange of the sealing cover, thereby realizing the sealing ring being pre-positioned on the sealing cover, and then the sealing ring is clamped when the sealing cover is installed and fixed to the valve body to realize the anti-dropping fixation of the sealing ring, thereby effectively avoiding the disadvantage that the sealing ring is easy to loosen;

[0021] When the sealing ring needs to be disassembled for maintenance or replacement, after the sealing cover is removed from the valve body, the ejection member can be manually pressed to make the ejection member protrude out of the sealing cover and press against the sealing ring, thereby driving the sealing ring to move relatively in a direction away from the limiting flange, causing the limiting groove of the sealing ring to disengage from the limiting position of the sealing cover, thereby achieving the effect of convenient disassembly.

[0022] Further, the ejection member 10 includes a movable pressing plate 11 and a push rod 12. The movable pressing plate 11 is elastically and movably arranged on one side of the sealing cover 7. The sealing cover 7 is located on the side away from the limiting flange 8 and is provided with a plurality of perforations 13 at intervals along the circumference. The perforations 13 penetrate the limiting flange 8. The push rod 12 is arranged on one side of the movable pressing plate 11 and is arranged in the perforations 13 one by one. The push rod 12 can move with the movable pressing plate 11 and protrude outward on the side of the perforations 13. Specifically, in the initial state, the movable pressing plate is kept away from the connection state of the sealing cover by the elastic force. At this time, the push rod is accommodated in the perforation of the sealing cover. When the sealing ring needs to be removed, the movable pressing plate can be pressed to make the push rod on the movable pressing plate move along the axial direction of the perforation and protrude outward from the perforation and press against the inner wall of the limiting groove, thereby causing the limiting groove of the sealing ring to be separated from the limiting flange, thereby facilitating the removal of the sealing ring and avoiding the problem that the sealing ring is difficult to remove due to the clamp of the limiting groove and the limiting flange.

[0023] Furthermore, the sealing cover 7 is provided with a cavity 14 on the side away from the limiting flange 8, the movable pressure plate 11 is movably arranged in the cavity 14, and a spring 15 is arranged between the bottom wall of the cavity 14 and the movable pressure plate 11. Then, the action of the spring keeps the ejector rod in the connection state accommodated in the perforation.

[0024] Furthermore, the cross-sectional outer contour of the limiting flange 8 is in the shape of a superior arc, and the cross-sectional contour of the limiting groove 9 is the same as that of the limiting flange 8. Thus, the sealing ring is sleeved and fixed on the limiting flange.

[0025] Furthermore, the sealing cover 7 is fixed in the sinking groove 6 by bolts and clamps the sealing ring 5.

[0026] Furthermore, internal threads are arranged along the circumference on the inner side of the sinking groove 6, and the sealing cover 7 is threadedly connected in the sinking groove 6.

[0027] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve structure with a sealing ring that can be easily disassembled and assembled, comprising a valve body (1), a valve cavity (2) formed in the valve body (1), and a sealing ring (5) arranged along the circumferential inner wall of the valve cavity (2), characterized in that: A recessed groove (6) is provided on one side of the valve body (1) along the edge contour of the valve cavity (2), a sealing cover (7) is detachably connected in the recessed groove (6), the sealing ring (5) is clamped between the valve body (1) and the sealing cover (7), a limiting flange (8) is provided on the sealing cover (7) along the edge contour on the side facing the valve cavity (2), a limiting groove (9) is recessed on one side of the sealing ring (5) and can be snap-fitted with the limiting flange (8), and a ejection member (10) is provided on the sealing cover (7) and can elastically extend and bulge outward on one side thereof so that the sealing ring (5) is separated from the limiting flange (8).

2. A butterfly valve structure with a sealing ring that is easy to disassemble and assemble according to claim 1, characterized in that: The ejection member (10) comprises a movable pressure plate (11) and an ejector rod (12); the movable pressure plate (11) is elastically and movably arranged on one side of the sealing cover (7); the sealing cover (7) is provided with a plurality of through holes (13) at intervals along the circumference on the side opposite to the limiting flange (8); the through holes (13) penetrate the limiting flange (8); the ejector rod (12) is arranged on one side of the movable pressure plate (11) and is arranged in the through holes (13) one by one; the ejector rod (12) can move with the movable pressure plate (11) and protrude outward from one side of the through holes (13).

3. A butterfly valve structure with a sealing ring that is easy to disassemble and assemble according to claim 2, characterized in that: The sealing cover (7) is provided with a concave cavity (14) on the side opposite to the limiting flange (8), the movable pressure plate (11) is movably arranged in the concave cavity (14), and a spring (15) is arranged between the bottom wall of the concave cavity (14) and the movable pressure plate (11).

4. The butterfly valve structure with a sealing ring that is easy to disassemble and assemble according to claim 1 is characterized in that: The cross-sectional profile of the limiting flange (8) is in the shape of an arc, and the cross-sectional profile of the limiting groove (9) is the same as the cross-sectional profile of the limiting flange (8).

5. The butterfly valve structure with a sealing ring that is easy to disassemble and assemble according to claim 1 is characterized in that: The sealing cover (7) is fixed in the sink (6) by means of bolts and clamps the sealing ring (5).

6. The butterfly valve structure with a sealing ring that is easy to disassemble and assemble according to claim 1 is characterized in that: An internal thread is arranged along the circumference of the inner side of the sink (6), and the sealing cover (7) is threadedly connected to the sink (6).

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