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A three-rod butterfly valve

A three-rod, butterfly valve technology, applied in the field of mechanical devices, can solve the problems of high actual requirements of structural accuracy, increased product cost, complicated tooling procedures, etc., and achieves the effect of improving the resistance to impact fatigue damage, saving energy and reducing costs.

Active Publication Date: 2018-05-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this butterfly valve still has deficiencies: the structural accuracy related to the three-bar mechanism is actually very high, the processing is difficult, the tooling procedure is complicated and the product cost is greatly increased

Method used

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  • A three-rod butterfly valve
  • A three-rod butterfly valve
  • A three-rod butterfly valve

Examples

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Embodiment Construction

[0018] Specific examples of the present invention are given below. The specific embodiments are only used to further describe the present invention in detail, and do not limit the protection scope of the claims of the present application.

[0019] The invention provides a three-rod butterfly valve (referred to as butterfly valve, see Figure 1-5 ), including valve seat 1, valve cover 2, cylinder 3, first connecting rod 4, pin fastener 5, second connecting rod 6, limit plate 7, valve body guide rail 8, valve body 9, support frame 10. Butterfly plate 11, third connecting rod 12, connecting frame 13, second positioning support frame 14, seal 15, seal pressure plate 16, first positioning support frame 17, sliding coupling 18, valve shaft 19, shaft Sleeve 20, stuffing pad 21, stuffing box 22, stuffing gland 23, driving device 24 and disc shaft 25;

[0020] The cross section of the valve body 9 is circular; one end of the valve body 9 is fixedly connected to the valve seat 1 throu...

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PUM

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Abstract

The invention discloses a three-rod butterfly valve comprising a valve seat, a bonnet, a cylinder, a pin fastener, a valve body, a butterfly plate, a sealing element, a sealing element press plate, a driving unit, a valve shaft, a packing seat, a packing box, a packing gland, a first connecting rod, a second connecting rod, a limit plate, a valve body guide rail, a support, a third connecting rod, a second positioning support, a first positioning support, a slip coupling, a bushing and a butterfly plate rotating shaft. The three-rod mechanism is composed of an intermittent mechanism and a slider crank mechanism, the slider crank mechanism plays a role in enabling the butterfly plate to translate for a certain distance prior to rotating when the butterfly plate is opened and closed; the intermittent mechanism functions in controlling the butterfly plate not to rotate when translating during opening and closing, and the butterfly plate starts to rotate only after leaving the valve seat for a certain distance. The butterfly valve converts circumferential rotational motion into axial translational and rotational motion through ingenious cooperation of the intermittent mechanism and the slider crank mechanism, and friction between the butterfly plate and a sealing pair during rotation is avoided.

Description

technical field [0001] The invention relates to a mechanical device, in particular to a three-rod butterfly valve. Background technique [0002] The three-rod butterfly valve usually includes a valve body, a valve seat, a valve stem and a butterfly plate; the valve seat is fixed in the inner cavity of the valve body, and the butterfly plate is located in the inner cavity of the valve seat. The working principle of the three-rod butterfly valve is that the driving mechanism drives the transmission shaft to rotate, the transmission shaft drives the transmission connecting rod, the transmission connecting rod drives the valve stem, and the valve stem drives the butterfly plate to rotate. After the butterfly plate rotates, its edge and the valve seat are sealed or opened. Therefore, the opening and closing of the valve is realized through the linkage mechanism. However, at the moment of opening and closing of the butterfly plate, the movement of the butterfly plate is a relativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/22F16K1/32F16K31/44F16K41/02F16K27/02
CPCF16K1/221F16K1/2268F16K27/0218
Inventor 张建辉王娟张万明宋阳杨欣霖谭若诗暴尧尧
Owner HEBEI UNIV OF TECH