CN207131922U - To butterfly shaped check valve - Google Patents

Abstract

The utility model proposes a kind of to butterfly shaped check valve, to solve the problem of poor to butterfly shaped check valve sealing in the prior art, related seals element service life is low.The utility model is set in the torsion spring on main shaft, and the both ends of torsion spring connect the valve plate of both sides, in addition to annular seal ring respectively, fixed seat is provided with the top of annular seal ring, loaded on main shaft, valve plate is between sealing ring and main shaft fixed seating.Advantage is：Sealing device is relatively independent, there is independent fixed form, avoids later stage damage and is flushed away, extends service life, improve sealing effectiveness, can further be increased by water-carrying capacity during valve open mode.

Description

To butterfly shaped check valve

Technical field

Valve body apparatus field is the utility model is related to, is particularly related to a kind of to butterfly shaped check valve.

Background technology

Check-valves refers to flow in itself by medium and automatic open and close flap, for preventing the valve of medium refluence, also known as Non-return valve, check valve, reflux valve and counterbalance valve.Check-valves belongs to a kind of automatic valve, and its main function is to prevent medium from falling Flow, prevent pump and drive motor from inverting, and vessel media is released.The effect of butterfly swing check valve is only to allow to be situated between among these Matter flows to a direction, and prevents direction from flowing.Usual this valve works automatically, the stream flowed in one direction Under the effect of body pressure, flap is opened；When fluid opposite direction flows, valve is acted on by the flap that overlaps certainly of Fluid pressure and flap Seat, so as to cut off flowing.

The improvement to butterfly shaped check valve is focused mostly at this stage in extending its service life, improve the sealing of its working condition Performance, such as, it has been disclosed that patent document in, exist it is a kind of valve plate edge install additional sealing ring to improve its sealing property, However, staff is after long-time is observed, it is believed that in existing technology, in use, sealing ring is often in current Fallen off under impact, service life is short.

The content of the invention

The utility model proposes a kind of to butterfly shaped check valve, it is poor to butterfly shaped check valve sealing in the prior art to solve, The problem of related seals element service life is low.

What the technical solution of the utility model was realized in：

Design a kind of to butterfly shaped check valve, including the split valve plate for being installed on main shaft both sides, be set on the main shaft Torsion spring, the both ends of the torsion spring connect the valve plate of both sides, in addition to annular seal ring respectively, at the top of the annular seal ring Provided with fixed seat, loaded on the main shaft, the valve plate is between the sealing ring and the main shaft fixed seating.

Preferably, the valve plate and the hinged connection of the main shaft, are provided with the both sides of hinged connecting shaft, corresponding valve plate The groove corresponding with main shaft surface configuration, angle during reducing valve plate open mode between two valve plates.It is set with the main shaft There is square fixed block, it is corresponding that square mounting hole is provided with institute's pipe laying.The endoporus of the pipeline is shoulder hole, its side Aperture it is equal with internal diameter of the seal ring, another lateral aperture is equal with valve plate external diameter.The main shaft upper end is provided with main shaft and consolidated Determine part.Sealing ring is made up of polytetrafluoroethylene (PTFE).

Beneficial effect is：Sealing device is relatively independent, there is independent fixed form, avoids later stage damage and is flushed away, Service life is extended, improves sealing effectiveness, valve open mode can further be increased by water-carrying capacity.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the utility model use state structural front view；

Fig. 2 is structure use state side-looking direction sectional view in the utility model；

Fig. 3 is mounting hole partial schematic diagram；

Fig. 4 is the utility model structure top view；

Fig. 5 is the mounting structure schematic diagram of valve plate and main shaft；

1. main shaft；2. torsion spring；3. groove；4. valve plate；5. pipeline；6. main shaft fixture；7. fixed block；8. sealing ring；9. Hinged connection；10. the curved edge of groove；

Main shaft fixture is removed in Fig. 4.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is paid The every other embodiment obtained, belong to the scope of the utility model protection.

Embodiment 1, it is a kind of to butterfly shaped check valve, including the split valve plate 4 for being installed on the both sides of main shaft 1, it is set on main shaft 1 Torsion spring 2, the both ends of torsion spring 2 connect the valve plate 4 of both sides, in addition to annular seal ring 8 respectively, at the top of annular seal ring 8 Provided with fixed seat, loaded on main shaft 1, valve plate 4 is between sealing ring 8 and main shaft 1 fixed seating.In the course of work, sealing ring Play a part of edge seal, and because it is fixed on main shaft, being not easy the later stage comes off.

Preferably, the hinged connection 9 of valve plate 4 and main shaft 1, be provided with the both sides of 9 axles of hinged connection, corresponding valve plate 4 with The corresponding groove 3 of the surface configuration of main shaft 1, angle during reducing 4 open mode of valve plate between two valve plates 4.Meanwhile valve plate is opened Angle it is bigger.Square fixed block 7 is set with main shaft 1, it is corresponding that square mounting hole is provided with institute's pipe laying 5.Pipeline 5 Endoporus be shoulder hole, the aperture of its side is equal with the internal diameter of sealing ring 8, and another lateral aperture is equal with the external diameter of valve plate 4.Main shaft 1 Upper end is provided with main shaft fixture 6.Sealing ring 8 is made up of polytetrafluoroethylene (PTFE).Shoulder hole can rise in the side of sealing ring To the effect of support, the deformation of sealing ring is prevented.

In the utility model, the material high temperature resistant of polytetrafluoroethylene (PTFE), corrosion-resistant, not viscous, self-lubricating, excellent dielectricity Energy, coefficient of friction are low, while its hardness feature, in the present embodiment, have certain resilience, service life length.

Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in Within the scope of shield.

Claims (6)

1. a kind of to butterfly shaped check valve, including the split valve plate for being installed on main shaft both sides, the torsion spring being set on the main shaft, institute The both ends for stating torsion spring connect the valve plate of both sides respectively, it is characterised in that：Also include annular seal ring (8), in the annular seal The top of circle (8) is provided with fixed seat, and for the fixed seating loaded on the main shaft (1), the valve plate (4) is in the sealing ring (8) between the main shaft (1).

2. as claimed in claim 1 to butterfly shaped check valve, it is characterised in that：The valve plate (4) and the main shaft (1) hinged company (9) are connect, the groove corresponding with main shaft (1) surface configuration is provided with the both sides of hinged connection (9) axle, corresponding valve plate (4) (3) angle when, to reduce valve plate (4) open mode between two valve plates (4).

3. as claimed in claim 1 to butterfly shaped check valve, it is characterised in that：Square fixed block is set with the main shaft (1) (7) it is, corresponding that square mounting hole is provided with pipe laying (5).

4. as claimed in claim 3 to butterfly shaped check valve, it is characterised in that：The endoporus of the pipe laying (5) is shoulder hole, The aperture of its side is equal with sealing ring (8) internal diameter, and another lateral aperture is equal with valve plate (4) external diameter.

5. as claimed in claim 1 to butterfly shaped check valve, it is characterised in that：Main shaft (1) upper end is provided with main shaft Fixture (6).

6. as claimed in claim 1 to butterfly shaped check valve, it is characterised in that：Sealing ring (8) is made up of polytetrafluoroethylene (PTFE).