CN201973303U

CN201973303U - Butterfly check valve with inclined plates

Info

Publication number: CN201973303U
Application number: CN201120104889XU
Authority: CN
Inventors: 蔡春喜; 刘长利
Original assignee: Tianjin Tanggu Water-seal Valve Co Ltd
Current assignee: Tianjin Tanggu Water-seal Valve Co Ltd
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-09-14
Anticipated expiration: 2021-04-12

Abstract

The utility model discloses a large-flow butterfly check valve with inclined plates, which can be quickly opened and closed and comprises a valve body, valve plates and a valve stem. The butterfly check valve is characterized in that the valve body is a cavity with two open sides, and the two valve plates rotate around the valve stem to be connected into the cavity of the valve body. When the valve body is closed, the two valve plates are symmetrically arranged on two sides of the valve stem, and two surfaces, which are positioned on the inner side of the cavity of the valve body, of the two valve plates are fixed to form an inclination angle smaller than 180 degrees. By the aid of the inclined plates of the butterfly check valve, opening and closing speeds of the valve are increased, pressure and impact force on the valve plates are reduced, the service life of the valve is effectively prolonged, and sealing performance of the valve is effectively enhanced. In addition, the butterfly check valve is provided with the semi-elliptical valve plates to match with an elliptical sealing ring on the valve body, so that the area of flowing section in a channel of the valve is increased.

Description

A kind of swash plate butterfly shaped check valve

Technical field

The utility model belongs to valve technology field, particularly relate to a kind of big flow, can fast opening and closing the swash plate butterfly shaped check valve.

Background technique

At present, domestic traditional butterfly shaped check valve mainly contains two kinds of structures.

A kind of structure is the butterfly shaped check valve that the valve plate by valve body and an integral body constitutes, and contacts between whole valve plate and the valve body and forms sealing.This kind butterfly shaped check valve structure is not compact, and valve opening is long with the stroke of closing, and can produce serious water hammer simultaneously when the passage medium flows backwards, and can apply very big water hammer hitting power to valve plate, thereby higher to the requirement of strength of valve plate.

Another kind of structure is as the disclosed a kind of bivalve butterfly shaped check valve of patent document CN201547338U, as shown in Figure 1.The valve body 1 of this kind structure is made of the cavity of two openings, and two valve plate 2 semicircular in shape symmetric shapes, and with valve rod 4 serve as the axle be rotatably connected in the cavity of valve body; When valve body was closed, two valve plates were in the same plane and form sealing and contact with seal ring 3 on the valve body; The rotating shaft 6 that is used for limiting the valve plate position is installed in parallel with valve rod and is positioned at rotary shaft hole (not shown) on the valve body, and two ends and valve body fix, and spring 5 one ends are arranged in the locating slot (not shown) on the valve plate, and the other end rides in the rotating shaft with hook.When medium when the valve body downside enters valve, the moment of torsion that the torque that the pressure of medium produces valve plate forms valve plate greater than spring, then valve plate is opened, medium passes through; When medium when the valve body upside flows to valve, pressure medium and spring close valve plate to the moment of torsion that valve plate produces, valve plate forms to seal with seal ring on the valve body and contacts, and medium can not be flow backwards, thereby valve plays the non-return effect.Though the butterfly shaped check valve of this kind structure has had some improvement than first kind of structure on solving the problems of the technologies described above, but still exist valve opening and shut-in time long, the valve overflow section is narrower and to the loss of valve body own than important disadvantages.

Summary of the invention

For solving the technical problem that exists in the above-mentioned prior art, the utility model provide a kind of big flow, can fast opening and closing the swash plate butterfly shaped check valve.

The technological scheme that the utility model is taked for the technical problem that exists in the solution prior art is:

A kind of swash plate butterfly shaped check valve comprises valve body, valve plate, valve rod, it is characterized in that, described valve body is the open cavitys in both sides; Two valve plates are that axle is rotatably connected in the cavity of valve body with the valve rod; When valve body was closed, two valve plates were symmetricly set on inboard one side that valve rod both sides and two valve plates be positioned at the valve body cavity and are fixed into oblique angle less than 180 °.

Wherein, described two valve plates are when valve body is closed, and its fixing oblique angle that is become of inboard one side that is positioned at the valve body cavity can be 120 °.

Described two valve plates are half-oval shaped.

Described swash plate butterfly shaped check valve also comprises seal ring, the marginal end of described two valve plates when valve body is closed with valve body on seal ring form sealing and contact, and seal ring is an elliptical shape.

The beneficial effects of the utility model are, the inboard one side that two valve plates are positioned at the valve body cavity when valve body is closed is fixed into less than 180 ° oblique angle and is symmetricly set on the valve rod both sides, preferred two valve plates are positioned at the inboard simultaneously fixing 120 ° of oblique angles that become of valve body cavity when valve body is closed, be that the inboard one side that valve plate is positioned at the valve body cavity becomes 60 ° of angles with passage MEDIA FLOW Inbound A, thereby change 0-90 ° of angle switch of traditional butterfly shaped check valve into 0-60 ° of angle switch, be 30 degree that the initial closed position of butterfly shaped check valve becomes conventional construction in the utility model, thereby make the valve opening and closing stroke shorten 1/3, quickened the keying speed of valve.Secondly, because the slanting set valve plate structure in the utility model, medium in the pipeline partly hits on the valve body heavy wall, thereby make the suffered medium refluence water hammer hitting power direction of valve plate change, become 60 degree side direction strikes by vertical strike of 90 degree, and hit the arm of force and shorten and make that hitting power is 1/2 of a conventional construction, hitting power reduces; Hit the 60 degree rotations that become new structure by 90 degree rotations of conventional construction on the arm of force and hit hitting, always hit momentum and significantly reduce; In addition, because valve plate is provided with the variation of angle, act on the stagnation pressure reduction on the valve plate, contrast is reduced to 86% of conventional construction, thereby has increased the working life and the sealability of valve effectively.Once more, the utility model adopts semiellipse type valve plate, is engaged in the ovaloid seal circle on the valve body, makes the valve overflow section increase, and has reduced flow resistance coefficient.

Description of drawings

Fig. 1 is the structural representation of bivalve butterfly shaped check valve in the prior art.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is a valve plate schematic representation of the present utility model.

Among the figure, 1, valve body, 2, valve plate, 3, seal ring, 4, valve rod, 5, spring, 6, rotating shaft, MEDIA FLOW Inbound in A, the passage.

Embodiment

In order to make those skilled in the art person understand the technical solution of the utility model better, the utility model is described in further detail below in conjunction with drawings and embodiments.

Shown in Fig. 2,3, the swash plate butterfly shaped check valve valve body 1 of present embodiment is the open cavity in both sides; Two half elliptic valve plates 2 serve as that axle is rotatably connected in the cavity of valve body with valve rod 4, fixedly connected with valve body in the valve rod two ends; Rotating shaft 6 is parallel with valve rod and be installed in the rotary shaft hole (not shown) on the valve body, fixedlys connected with valve body in two ends; Spring 5 one ends are arranged in the locating slot (not shown) of valve plate, and the other end is fixed in the rotating shaft 6; When valve body is closed, two valve plates are symmetricly set on inboard one side that valve rod both sides and two valve plates be positioned at the valve body cavity and are fixed into oblique angle less than 180 °, the inboard one side that preferred two valve plates are positioned at the valve body cavity is fixed into hexagonal angle, and promptly the valve plate inboard one side that is positioned at the valve body cavity becomes 60 ° of angles with passage MEDIA FLOW Inbound A.The marginal end of two half elliptic valve plates 2 when valve body 1 is closed with valve body 1 on seal ring 3 form sealing and contact, and seal ring 3 is an elliptical shape.

When medium in passage when direction A enters valve, the inboard one side that is positioned at the valve body cavity because of valve plate becomes 60 ° of angles with passage MEDIA FLOW Inbound A, make the initial closed position of valve become 30 degree of conventional construction, thereby make the valve opening and closing stroke shorten 1/3, quickened the keying speed of valve.Simultaneously, when valve closing, this structure makes the suffered medium refluence water hammer hitting power direction of valve plate be become 60 degree side direction and hit by vertical strike of 90 degree of conventional construction, makes suffered hitting power of valve plate and pressure reduce, thereby has increased the working life and the sealability of valve effectively.In addition, the utility model adopts two semiellipse type valve plates, and is engaged in the ovaloid seal circle on the valve body, makes the valve overflow section increase, and has reduced flow resistance coefficient.

Claims

1. a swash plate butterfly shaped check valve comprises valve body, valve plate, valve rod, it is characterized in that: described valve body is the open cavitys in both sides; Two valve plates are that axle is rotatably connected in the cavity of valve body with the valve rod; When valve body was closed, two valve plates were symmetricly set on inboard one side that valve rod both sides and two valve plates be positioned at the valve body cavity and are fixed into oblique angle less than 180 °.

2. swash plate butterfly shaped check valve according to claim 1 is characterized in that: described two valve plates are when valve body is closed, and its fixing oblique angle that is become of inboard one side that is positioned at the valve body cavity is 120 °.

3. according to claim 1,2 arbitrary described swash plate butterfly shaped check valves, it is characterized in that: described two valve plates are half-oval shaped.

4. swash plate butterfly shaped check valve according to claim 3 is characterized in that: also comprise seal ring, the marginal end of described two valve plates when valve body is closed with valve body on seal ring form sealing and contact, and seal ring is an elliptical shape.