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Full-lining bidirectional composite soft sealing butterfly valve

A soft sealing and lining technology, which is applied in the direction of lifting valves, valve devices, engine components, etc., can solve the problems of large-caliber butterfly valve switching torque is too large, can not meet the requirements of two-way sealing, and the valve plate is easy to lock and close when it is closed. Improve corrosion resistance, good compensation and limit, not easy to lock effect

Inactive Publication Date: 2011-03-09
SHANDONG LULIN VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the valve shaft and the valve plate are connected by taper pins. During use, there are serious internal corrosion and inaccurate sealing positions. The valve plate is easy to lock or close when it is closed, which cannot meet the requirements of two-way sealing. The switch of large-diameter butterfly valves Too much torque and many other problems

Method used

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  • Full-lining bidirectional composite soft sealing butterfly valve
  • Full-lining bidirectional composite soft sealing butterfly valve
  • Full-lining bidirectional composite soft sealing butterfly valve

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Embodiment Construction

[0020] Attached below Figure 1-3 The present invention is described further:

[0021] Refer to attached Figure 1-3 :

[0022] The fully lined two-way composite soft seal butterfly valve consists of a valve body 1, a valve plate 2, a valve seat 3, an upper valve shaft 4, a seat 5, a packing gland 6, a bushing 7, an O-ring 8, and a lower valve shaft 9 And the rear end cover 10 is formed. The valve seat 3 is directly vulcanized on the valve body 1 in the form of a composite eccentric inclined plane seal and completely covers the valve body 1, and extends to both sides of the valve body 1, such as figure 1 As shown, the valve seat 3 forms an included angle α with the upper semicircle of the valve plate 2 and is offset by a distance e relative to the axis (also the center of the valve body). The center of the valve body) is offset by a distance e, and the two eccentrics overlap at the center of the valve body to form a compound eccentric slope sealing form of the valve seat 3...

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Abstract

The invention discloses a full-lining bidirectional composite soft sealing butterfly valve, which belongs to a butterfly valve for a pipeline of fresh water, gas and the like in large water supply and drainage engineering and seawater and sewage treatment. The butterfly valve comprises a valve body, a valve seat arranged on the valve body, a valve plate rotating around a valve shaft, a valve shaft connected with the valve plate, a connection seat, a gland, a bushing, a seal ring and a rear end cover arranged on the bottom part of the valve body, wherein the connection seat, the gland, the bushing and the seal ring are arranged on the upper part of the valve body, thevalve shaft is connected with the valve plate by an upper valve shaft (4) and a lower valve shaft (9) through a square or flat head; the valve plate (2) is an inclined plate spherical surface; the valve seat (3) is directly vulcanized on the valve body (1) in a composite eccentric bevel sealing mode and completely covers the valve body (1); the upper and lower supports of the valve body (1) are sealed by an O-shaped seal ring (8); the O-shaped seal ring (8) is compacted by a packing gland (6) and the bushing (7); and the bushing (7) is installed in the upper and lower supports of the valve body (1). The invention has the advantages of capability of avoiding locking or over-closing, corrosion resistance, long service life, high sealing performance and the like.

Description

technical field [0001] Fully lined two-way composite soft-sealed butterfly valve belongs to the butterfly valve used in large-scale water supply and drainage projects, seawater, sewage treatment, fresh water, gas and other pipelines. Background technique [0002] Butterfly valve refers to a kind of valve whose butterfly plate is a disc and rotates around the valve shaft to open and close. It is mainly used for cutting and throttling on pipelines. It is widely used in large-scale water supply and drainage projects, seawater, sewage treatment, fresh water, Gas etc. pipes. The opening and closing part of the butterfly valve is a disc-shaped valve plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. Existing butterfly valve is made up of valve body, valve seat (rubber seat), valve shaft, valve plate, axle sleeve, connecting seat, end cover, transmission device etc. Among them, the valve shaft and the valve plate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/22F16K1/34
Inventor 王文芳于爱华刘力
Owner SHANDONG LULIN VALVE
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