CN202484369U

CN202484369U - Butterfly check valve

Info

Publication number: CN202484369U
Application number: CN2012201193559U
Authority: CN
Inventors: 洪灿城; 洪林海
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2012-10-10
Anticipated expiration: 2022-03-27

Abstract

The utility model discloses a butterfly check valve which comprises a valve body, a valve clack, a valve shaft, a connecting sheet, a torsional spring and an annular sealing ring, wherein the valve clack is a round sheet-shaped valve clack corresponding to a middle cavity of the valve body; the upper end part of the connecting sheet is hinged with the valve body through the valve shaft; the torsional spring is arranged between the connecting sheet and the valve shaft; the lower end part of the connecting sheet is fixedly connected with the middle part of the valve clack; the valve body is provided with an annular groove corresponding to the outer edge of the valve clack; and the annular sealing ring is arranged in the annular groove. The butterfly check valve has the advantages of low flow resistance and low cost, does not cause inner leakage and outer leakage easily, and saves materials; and moreover, a sealing rubber strip can be replaced, and dirt can not be accumulated easily.

Description

Butterfly check valve

Technical field

The utility model relates to a kind of valve, is specifically related to the butterfly check valve that a kind of usefulness prevents the pipeline medium reverse backflow.

Background technique

In the prior art; Mostly butterfly check valve is that it comprises valve body and two semicircular butterfly flaps of column to the folder butterfly check valve, and two semicircular butterfly flaps are connected in the valve body through valve shaft; Be provided with torsion spring between butterfly flap and the valve shaft, the half the circumference of the sleeve where it joins the shoulder of valve body is provided with sealing joint strip.During work, when the medium reverse flow, under the elastic force and pressure action of medium of torsion spring, the butterfly flap is pressed on the sealing joint strip of half the circumference of the sleeve where it joins the shoulder of valve body, reaches sealing.

Yet the structure to the folder butterfly check valve of existing technology is reasonable inadequately, leaks in being prone to take place.The middle part of valve body to the folder butterfly check valve of existing technology is provided with and is used to make the supporting frame that seals between two flaps, and this supporting frame can increase flow resistance.The valve shaft to the folder butterfly check valve of existing technology runs through whole valve body, and valve body is provided with the installation through holes that is used to install valve shaft, and this makes the folder butterfly check valve more is prone to leak outside.The internal structure to the folder butterfly check valve of existing technology is comparatively complicated, and its parts are relatively large, waste material, not enough environmental protection.The sealing joint strip to the folder butterfly check valve of existing technology is that directly the sulfuration lining is difficult for changing on valve body, and the gap between adhesive tape present position and valve wall hoards the interior foreign material such as stone sand of pipeline easily, thereby influences sealing effect.

The model utility content

The utility model is in order to overcome the deficiency that existing technology exists, provide leak in a kind of being difficult for and leak outside, flow resistance is little, economical with materials, low, the replaceable sealing joint strip of cost, be difficult for hoarding the butterfly check valve of dirt.

The utility model is realized through following technological scheme: a kind of butterfly check valve; Comprise valve body, a slice flap, a valve shaft, a connecting sheet, a torsion spring and an O-ring seal; Said flap is the round sheet flap corresponding to the middle cavities setting of said valve body; The upper end portion of said connecting sheet is hinged through said valve shaft and said valve body, and said torsion spring is arranged between said connecting sheet and the said valve shaft, and the underpart of said connecting sheet is fixedly connected with the middle part of said flap; Said valve body is provided with annular groove corresponding to the outer rim of said flap, and said O-ring seal is arranged in this annular groove.

Said connecting sheet is connected with the matching and fixing of tightening nut through clamping bolt with said flap.

The beneficial effect of the utility model is: the utlity model has leak in being difficult for and leak outside, flow resistance is little, economical with materials, low, the replaceable sealing joint strip of cost, the advantage that is difficult for hoarding dirt.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 be Fig. 1 A-A to cross-sectional view;

Fig. 3 is the structure for amplifying schematic representation of the A portion of Fig. 2.

In the drawings: the 1-valve body; The 2-flap; The 3-valve shaft; The 4-O-ring seal; The 5-torsion spring; The 6-connecting sheet; The 7-clamping bolt; The 8-tightening nut.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail.

Like Fig. 1-shown in Figure 3; A kind of butterfly check valve; Comprise valve body 1, a slice flap 2, valve shaft 3, connecting sheet 6, a torsion spring 5 and an O-ring seal 4, flap 2 is the round sheet flap 2 that the middle cavities corresponding to valve body 1 is provided with, and the upper end portion of connecting sheet 6 is hinged through valve shaft 3 and valve body 1; Torsion spring 5 is arranged between connecting sheet 6 and the valve shaft 3; The underpart of connecting sheet 6 is fixedly connected with the middle part of flap 2, and valve body 1 is provided with annular groove corresponding to the outer rim of flap 2, and O-ring seal 4 is arranged in this annular groove.

Wherein, connecting sheet 6 is connected through the matching and fixing of clamping bolt 7 with tightening nut 8 with flap 2.

In the utility model, the middle part of valve body 1 is not provided with supporting frame and unnecessary line seal adhesive tape, can effectively reduce interior leakage, reduce flow resistance; The utility model has only adopted a valve shaft 3, and this valve shaft 3 does not run through whole valve body 1, and it is arranged at a side of valve body 1, on housing, only stays next mounting hole, effectively reduces leaking outside; The utility model adopts the circular flap 2 of a slice, and simple in structure, performance is better, saves material more; The utility model adopts an O-ring seal 4, and it embeds in the annular groove of housing, is convenient for changing, and is difficult for hoarding dirt, good sealing effect.

Should be noted that at last; Above content is only in order to explain the technological scheme of the utility model; But not to the restriction of the utility model protection domain; The simple modification that those of ordinary skill in the art carries out the technological scheme of the utility model perhaps is equal to replacement, does not all break away from the essence and the scope of the utility model technological scheme.

Claims

1. butterfly check valve; Comprise valve body; It is characterized in that: also comprise a slice flap, a valve shaft, a connecting sheet, a torsion spring and an O-ring seal, said flap is that the upper end portion of said connecting sheet is hinged through said valve shaft and said valve body corresponding to the round sheet flap of the middle cavities setting of said valve body; Said torsion spring is arranged between said connecting sheet and the said valve shaft; The underpart of said connecting sheet is fixedly connected with the middle part of said flap, and said valve body is provided with annular groove corresponding to the outer rim of said flap, and said O-ring seal is arranged in this annular groove.

2. butterfly check valve according to claim 1 is characterized in that: said connecting sheet is connected with the matching and fixing of tightening nut through clamping bolt with said flap.