Hard sealing electric butterfly valve

Abstract

The utility model provides a hard sealing electric butterfly valve, and belongs to the technical field of butterfly valves. The technical problems that after the butterfly valve is used for a long time, a gap is easily generated between the valve plate and the inner wall of the valve body, and the sealing effect on small-density substances such as gas is poor are solved. According to the technical scheme, the hard sealing electric butterfly valve comprises a valve body and a valve plate, a sealing ring is connected to the wall of the valve body, the sealing ring and the valve body are coaxially arranged, a sealing ring is arranged on the side wall of the valve plate, the sealing ring and the valve plate are coaxially arranged, and the sealing ring and the sealing ring are attached to each other and used for sealing the butterfly valve. The butterfly valve has the advantages that a gap between the valve plate and the inner wall of the valve body can be made up through matching of the sealing ring and the sealing ring, and therefore the sealing effect of the butterfly valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field especially relates to a hard sealing electric butterfly valve. BACKGROUND

[0002] The butterfly valve is also called flap valve, and it is a simple structure regulating valve, which can be used for on-off control of low-pressure pipeline medium, and can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive medium. The butterfly valve mainly plays the role of cutting off and throttling on the pipeline. The butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting.

[0003] In the prior art, the closing of the butterfly valve is realized by directly attaching the edge side wall of the valve plate to the inner wall of the valve body to realize sealing, but after long-term use of the butterfly valve, a gap is easily generated between the valve plate and the inner wall of the valve body, and the sealing effect of some gases and other substances with small density is poor. SUMMARY

[0004] The utility model discloses a butterfly valve, which can improve the sealing effect of the butterfly valve.

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

[0006] A hard sealing electric butterfly valve, comprising a valve body and a valve plate, a sealing ring is connected to the inner wall of the valve body, the sealing ring is welded to the valve body, the sealing ring and the valve body are coaxially arranged, a sealing ring is detachably arranged on the side wall of the valve plate, the sealing ring and the valve plate are coaxially arranged, the outer wall of the sealing ring and the inner wall of the sealing ring are attached, and the sealing ring is used for sealing the butterfly valve.

[0007] Further, the side wall of the valve plate is coaxially connected with a pressing ring, the pressing ring is fixedly connected to the valve plate through bolts, the sealing ring is pressed between the pressing ring and the valve plate, the outer diameter of the sealing ring is larger than the outer diameter of the pressing ring, and the outer extension of the sealing ring protrudes along the outer edge of the valve plate and the pressing ring.

[0008] Further, the side wall of the valve plate is provided with a stepped groove, the pressing ring is connected in the stepped groove, and the sealing ring is located between the pressing ring and the bottom wall of the stepped groove.

[0009] Further, the sealing ring comprises a plurality of layers of stainless steel and asbestos plates, the stainless steel and asbestos plates are arranged in turn and staggered, and the stainless steel and asbestos plates are fixedly connected by glue.

[0010] Further, the sealing ring is made of stainless steel.

[0011] Further, the valve plate is connected with a driving shaft, the other side of the driving shaft is connected with a motor of the power station, a shaft sleeve is sleeved on the driving shaft, and a dustproof ring is sleeved on the driving shaft and located between the shaft sleeve and the driving shaft.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. When the valve plate rotates to seal the valve body, the sealing ring rotates and is attached to the sealing ring, and further abuts with the rotation of the valve plate, thereby compensating the gap between the valve plate and the inner wall of the valve body, so that the sealing effect of the butterfly valve is improved; when the sealing ring and the sealing ring have a gap, the sealing ring can be replaced in time.

[0014] 2. The dustproof ring can be sealed between the shaft sleeve and the driving shaft to avoid the influence of dust and other impurities. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model.

[0016] Figure 1 It is a partial cross-sectional view of the hard sealing electric butterfly valve in the embodiments of the utility model.

[0017] Figure 2 It is a partial cross-sectional view of the hard sealing electric butterfly valve in the embodiments of the utility model.

[0018] Wherein, the reference numerals are: 1, valve body;11, sealing ring;2, valve plate;21, sealing ring;22, pressing ring;23, stepped groove;24, driving shaft;241, shaft sleeve;242, dustproof ring;3, power station. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0020] See Figure 1 And Figure 2 The utility model provides a technical scheme, which is a hard sealing electric butterfly valve, which comprises a valve body 1 and a valve plate 2, the valve body 1 and the valve plate 2 are circular, the valve plate 2 is rotatably arranged relative to the valve body 1, the valve body 1 is connected on a pipeline, the outer side wall of the valve plate 2 is connected with a driving shaft 24, and the end, away from the valve plate 2, of the driving shaft 24 is connected with a motor of the power station.

[0021] Preferably, a sealing ring 11 is connected to the inner wall of the valve body 1, the sealing ring 11 is made of stainless steel and is fixedly connected to the valve body 1 by welding, and the sealing ring 11 is coaxially arranged with the valve body 1.

[0022] Preferably, a stepped groove 23 is formed in the side wall of the valve plate 2, the stepped groove 23 is an annular groove, a sealing ring 21 and a pressing ring 22 are placed in the stepped groove 23, the sealing ring 21 is located between the pressing ring 22 and the bottom wall of the stepped groove 23, the pressing ring 22 is fixedly connected to the bottom wall of the stepped groove 23 by bolts to realize the connection with the valve plate 2, the pressing ring 22 simultaneously presses the sealing ring 21 against the bottom wall of the stepped groove 23 to realize the fixation of the sealing ring 21, and the outer diameter of the sealing ring 21 is greater than the outer diameters of the pressing ring 22 and the valve plate 2, so that the sealing ring 21 protrudes outward along the outer edges of the valve plate 2 and the pressing ring 22.

[0023] Preferably, the sealing ring 21 is made of several layers of stainless steel and asbestos plates, the stainless steel and the asbestos plates are arranged alternately, and the stainless steel and the asbestos plates are fixedly connected by glue.

[0024] When the valve plate 2 seals the valve body 1, the motor drives the driving shaft 24 to rotate the valve plate 2, the valve plate 2 drives the sealing ring 21 to rotate and abut against the sealing ring 11, and the sealing ring 11 and the sealing ring 21 further abut against each other with the rotation of the valve plate 2, so that the gap between the valve plate 2 and the inner wall of the valve body 1 is compensated, thereby improving the sealing effect of the butterfly valve, and when a gap appears between the sealing ring 21 and the sealing ring 11, the bolts on the pressing ring 22 can be removed to disassemble the pressing ring 22 and replace the new sealing ring 21, which is convenient and fast.

[0025] Preferably, a shaft sleeve 241 is sleeved on the driving shaft 24, and a dustproof ring 242 is sleeved on the driving shaft 24, the dustproof ring 242 is located between the shaft sleeve 241 and the driving shaft 24, the dustproof ring 242 is an O-shaped ring made of rubber, a ring groove is pre-formed on the driving shaft 24 for mounting the dustproof ring 242 to consolidate the mounting position of the dustproof ring 242, and the dustproof ring 242 can be sealed between the shaft sleeve 241 and the driving shaft 24 to avoid the influence of dust and other impurities.

[0026] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hard-sealed motor-operated butterfly valve comprising a valve body (1) and a valve plate (2), characterized in that, The sealing ring (11) is coaxially arranged on the inner wall of the valve body (1), the sealing ring (21) is coaxially arranged on the side wall of the valve plate (2), the sealing ring (21) is attached to the sealing ring (11), and the butterfly valve is sealed. The driving shaft (24) is connected to the valve plate (2), the shaft sleeve (241) is sleeved on the driving shaft (24), the dustproof ring (242) is sleeved on the driving shaft (24), the dustproof ring (242) is located between the shaft sleeve (241) and the driving shaft (24), and the ring groove for mounting the dustproof ring (242) is pre-formed on the driving shaft (24), so that the mounting position of the dustproof ring (242) is consolidated.

2. The hard-sealed electric butterfly valve according to claim 1, characterized in that, The pressure ring (22) is coaxially connected to the side wall of the valve plate (2), the sealing ring (21) is tightly pressed between the pressure ring (22) and the valve plate (2), and the outer diameter of the sealing ring (21) is greater than the outer diameter of the pressure ring (22).

3. The hard-sealed electric butterfly valve according to claim 2, wherein The stepped groove (23) is formed in the side wall of the valve plate (2), the pressure ring (22) is connected in the stepped groove (23), and the sealing ring (21) is located between the pressure ring (22) and the bottom wall of the stepped groove (23).

4. The hard-sealed electric butterfly valve according to claim 1, wherein The sealing ring (21) comprises a plurality of layers of stainless steel and asbestos plates, and the stainless steel and asbestos plates are arranged in turn and staggered.

5. The hard-sealed motor operated butterfly valve of claim 1 wherein, The sealing ring (11) is made of stainless steel.

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