CN2152955Y

CN2152955Y - Micro-resistant flexible back valve

Info

Publication number: CN2152955Y
Application number: CN 93227097
Authority: CN
Inventors: 徐宏智
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-12
Filing date: 1993-01-12
Publication date: 1994-01-12
Anticipated expiration: 2003-01-12

Abstract

The utility model relates to a micro-resistant flexible back valve used for a pipe-line liquid switch. The micro-resistant flexible back valve comprises a valve body, a valve flap, a pressing strip and a screw, the calibers of the both ends of the valve body are the same, the inlet end of the valve body is extended gradually, the outlet end of the valve body is shrank gradually, and a strip of ribbed slab is in the valve body; the valve flap is formed by the connection of a circular rubber plate and two small half circular iron plates. The micro-resistant flexible back valve has the advantages of simple structure, small volume and resistance force, a little consumed energy, low cost, long life time, etc.

Description

Micro-resistant flexible back valve

The utility model relates to a kind of little resistance elastomeric check valve that is used for the pipeline fluid switch.

The safety check kind that is used for the pipeline fluid switch at present is a lot.Common have a little resistance safety check of HH44 type, and H44 type rotary-open type returns valve, and H11 type rise-fall type returns valve.Though existing little resistance safety check resistance is little, the power consumption few, its structure is complicated, and volume is big, cost is high; The deficiency that rotary-open type and Lift check valve are deposited is that volume is big, resistance big, power consumption is high.

The purpose of this utility model provide a kind of simple in structure, volume is little, resistance is little, power consumption less, cost is low, little resistance elastomeric check valve that the life-span is long.

The utility model realizes that the technical solution of above-mentioned purpose is, manage less than the garden of convergent length with flanged (FLGD), entrance point flaring, outlet end convergent, flaring length at the two ends bore, flaring change convergent place is provided with a gusset by its diameter in the pipe, gusset shared sectional area in pipe is less than or equal to directly area poor of the maximum secting area of flaring part and the mouth of pipe, gusset is provided with several screws, with press strip and screw a flap of being made up of two smaller part garden shape iron plates of garden shape offset plate binding is fixed on the gusset.Accompany the several layers fibre cloth in the offset plate.Smaller part garden shape iron plate is provided with position limiting pile, and permanent magnet is equipped with in the upper end of stake, is used for opening latter two smaller part garden shape iron plate at flap and two iron plates is held and maintain certain distance when being close, and reduces fluid resistance.

The utility model compared with prior art owing to adopted abovementioned technology, has simple in structurely, volume is little, resistance is little, power consumption less, advantage such as cost is low, and the life-span is long.

Describe a specific embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of little resistance elastomeric check valve.

Fig. 2 is the structural representation of flap.

This safety check comprises identical flanged (FLGD), the entrance point flaring of two ends bore, outlet end convergent, the flaring length pipe less than convergent length, flaring change convergent place is provided with a valve body that gusset constituted 1 by its diameter in pipe, on gusset, be provided with screw, a flap 4 of being made up of two smaller part garden shape iron plates of garden shape offset plate binding be fixed on the gusset of valve body 1 with press strip 2 and screw 3.On the shape iron plate of smaller part garden, be provided with position limiting pile 5, permanent magnet 6 be housed in the upper end of stake 5.The material of valve body 1, press strip 2, screw 3 is metal or plastics, and the material of flap 4 is to be made of the offset plate and the iron plate that accompany the layer fibre cloth of working hard, and the material of position limiting pile 5 is an iron, and the material of permanent magnet 6 is made for the NdFeB rear-earth element.But also line with rubber in the valve body 1.

During use, this safety check is installed on the pipe, open pump water flowing (vapour or oil), water (vapour or oil) flows into valve body by entrance point, flap is subjected to the thrust of water (vapour or oil) stream and opens, and during when the flap standard-sized sheet or near standard-sized sheet, makes the iron plate of two smaller part garden shapes on the flap hold and maintain a certain distance under the effect of permanent magnets, water this moment (vapour or oil) is smooth logical, realizes little resistance; When pump shutdown, flap is closed under the effect of the elasticity Hui Li of refluence water (vapour or oil) and offset plate automatically, realizes non-return.

Claims

1, a kind of identical by the two ends bore, entrance point flaring, outlet end convergent, flaring length are less than the pipe of convergent length, be provided with the valve body of a gusset in the pipe, the little resistance elastomeric check valve that flap is fixed on the gusset to be constituted with press strip and screw, it is characterized in that: valve body is an entrance point flaring outlet end convergent, gusset is positioned at the pipe flaring and becomes the convergent place, gusset is by its diameter, gusset shared sectional area in pipe is less than or equal to the poor of flaring part maximum secting area and mouth of pipe footpath area, and screw is arranged on the gusset.

2, little resistance elastomeric check valve according to claim 1 is characterized in that: flap links two smaller part round iron plates by a circular offset plate and forms, and accompanies the several layers fibre cloth in the offset plate.

3, little resistance elastomeric check valve according to claim 1, it is characterized in that: the smaller part round iron plate is provided with position limiting pile, and permanent magnet is housed on the position limiting pile.