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Eccentric check valve

A check valve and eccentric technology, applied in the field of eccentric check valves, can solve the problems of exhaust gas backflow and exhaust resistance, and achieve the effect of reducing exhaust resistance and ensuring full closure.

Inactive Publication Date: 2012-12-05
深圳市万居科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an eccentric check valve, which solves the problem of existing exhaust resistance and at the same time avoids oil accumulation to ensure no exhaust The full closure of the eccentric check valve solves the problem of backflow of exhaust gas

Method used

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  • Eccentric check valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] refer to Figure 5 to Figure 8 , is a schematic structural diagram of the first embodiment provided by the present invention. The eccentric check valve 100 includes a valve body 110 , an eccentric shaft 120 and a check plate 130 . The valve body 110 has a sleeve-like structure with a circular through hole 111 at the center, and two opposite installation holes 112 are opened on the side wall of the through hole 111, and the eccentric shaft 120 is arranged in the installation hole 112, and the non-return plate 130 is connected with the eccentric shaft. 120 is connected and fixed in the through hole 111 through the eccentric shaft 120 , and the edge of the non-return piece 130 is in contact with the edge of the through hole 111 . refer to Figure 5 , Figure 6 , the centerline of the eccentric shaft 120 is horizontal, which divides the non-return piece 130 into a large piece 131 and a small piece 132 of different sizes, wherein the large piece 131 is located above the e...

Embodiment 2

[0041] refer to Figure 9 , Figure 10 , is a schematic structural diagram of the second embodiment provided by the present invention. Compared with the first embodiment, this embodiment differs in that the way of fixing the weight 140 is different. In Embodiment 1, the weight 140 is directly fixed on the front of the small piece 132 by welding, bonding or screwing. In this embodiment, the weight 140 is fixed on the large piece 131 and acts on the small piece 132 . As shown in the figure, the weight 140 falls on or does not fall on the small piece 132 through a connecting piece 141 fixed on the large piece 131 . The connecting member 141 can be a suspension rope, a suspension rod, a pull rope or a pull rod and the like. In this way, although the weight 140 is fixed on the large piece 131, it still acts on the small piece 132. When not exhausting, it still drives the small piece 132 to fall back by its gravity to drive the large piece 131 to return to the sealing tape 160. ...

Embodiment 3

[0043] Similarly, refer to Figure 11 , is a schematic cross-sectional view of the exhaust gas of the third embodiment provided by the present invention. The difference between this embodiment and the first and second embodiments is that the weight 140 is fixed on the small piece 132 through a support rod 142 disposed on the small piece 132 . In this embodiment, it is one of many ways to fix the weight 140 , and its other structures and working principles will not be repeated here.

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Abstract

The invention relates to the technical field of building exhaust systems and provides an eccentric check valve comprising a valve body with a through hole at the center, an eccentric shaft and a stop piece. The stop piece is attached to the edge of the through hole, the stop piece is divided by the central line of the eccentric shaft into a small piece and a big piece which are positioned above and below the eccentric shaft respectively; and weighting material is fixed on the big piece or the small piece. In the eccentric check valve, the big piece is arranged above the eccentric shaft, gas flow enters a pipeline through an opening of the big piece arranged above the eccentric shaft during gas exhaust so that gas flow entering along the upward oblique direction of the big piece flows in a direction similar to the direction of the upward gas flow in a common pipeline, and therefore, exhaust resistance is greatly reduced and gas can be discharged upwards smoothly; when no gas is discharged, the stop piece restores the state of attachment to the through hole under the gravity action of the weighting material fixed on the stop piece; and meanwhile, no oil is accumulated at an attached face of the small piece positioned below and the through hole, so that the total closing of the stop piece can be guaranteed, and back flow of waste gas in the pipeline is avoided.

Description

technical field [0001] The invention belongs to the technical field of building exhaust systems, in particular to an eccentric check valve used in building exhaust systems. Background technique [0002] At present, an eccentric check valve is generally provided at the air inlet of the shared exhaust channel of the residential kitchen, and the conduction or closure of the exhaust channel is controlled by the eccentric check valve. refer to Figure 1 to Figure 4 , which is an eccentric check valve in the prior art. The eccentric check valve 100' includes a valve body 110' with a through hole (not numbered in the figure) in the center, an eccentric shaft 120' penetrated in the through hole 111' and fixed to the through hole 111 through the eccentric shaft 120'. The non-return piece 130' inside the eccentric shaft 120' centerline divides the non-return piece 130' into a small piece 131' and a large piece 132', wherein the small piece 131' is located above the eccentric shaft 12...

Claims

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Application Information

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IPC IPC(8): F16K15/03
Inventor 张琦
Owner 深圳市万居科技股份有限公司