CN208535238U - Roots blower check-valves - Google Patents

Abstract

The utility model relates to a kind of check-valves, and in particular to a kind of roots blower check-valves.Including first pipe, second pipe and flap, first pipe inner upper is equipped with rotation axis, rotation axis is equipped with stress triangle body, and flap is connect by two fixed links with stress triangle body, and second pipe connects roots blower discharge pipe, when fluid forward direction passes through, fluid makes flap and horizontal plane generate minute angle, in fluid countercurrent current stress triangle body inclined-plane applied force, the minute angle of flap and horizontal plane can make flap by the active force of the fluid of adverse current, be closed flap more rapidly.The utility model non-return is sensitive, non-return significant effect.

Description

Roots blower check-valves

Technical field

The utility model relates to a kind of check-valves, and in particular to a kind of roots blower check-valves.

Background technique

Check-valves belongs to a kind of automatic valve, and main function is only medium to be allowed to flow to a direction, prevents opposite direction Flowing.Under the Fluid pressure effect that check-valves flows in one direction, flap is opened, and fluid passes through check-valves；Fluid opposite direction When flowing, by under Fluid pressure and the self gravity collective effect of flap, flap is closed, to cut off flowing.

Existing roots blower check-valves, structure is complex, and non-return is insensitive, is influenced by its structure, non-return effect There is certain delay, easily cause fluid reflux, roots blower is caused to damage, is also easy to cause security risk.

Utility model content

According to the above-mentioned deficiencies in the prior art, technical problem to be solved by the utility model is: providing a kind of non-return spirit It is quick, the effective roots blower check-valves of non-return.

Roots blower check-valves described in the utility model, including first pipe, second pipe and flap, in first pipe Rotation axis is equipped with above portion, rotation axis is equipped with stress triangle body, and flap is connect by two fixed links with stress triangle body, the Two pipelines connect roots blower discharge pipe.

Preferably, flap and second pipe contact surface are equipped with rubber ring.

Preferably, stress triangle body dissection surface is right angled triangle, in flap closure, a right angle of stress triangle body Face is parallel to horizontal plane, another right-angle surface vertical and horizontal face, and towards second pipe.

Preferably, flap diameter is slightly larger than second pipe diameter.

Preferably, two fixed links are welded on flap.

Preferably, rotation axis is parallel to horizontal plane, and is parallel to first pipe cross-sectional diameter.

Preferably, first pipe diameter is greater than second pipe.

Operation principle and process:

The utility model is mounted on roots blower discharge pipe or is connect by blow valve with roots blower discharge pipe, works as fluid It is flowed out from roots blower, under fluid matasomatism, flap is opened, and fluid passes through check-valves；When adverse current occurs, flap is in adverse current Fluid matasomatism in the power of stress triangle body right-angle surface, adverse current fluid matasomatism in flap three power of power and flap self gravity conjunction The lower closure of power effect, prevents fluid countercurrent current from returning roots blower.

Possessed beneficial effect is the utility model compared with prior art:

For the utility model when fluid forward direction passes through, fluid makes flap and horizontal plane to stress triangle body inclined-plane applied force Minute angle is generated, makes fluid in adverse current, flap can be allowed more rapidly to close simultaneously to stress triangle body and flap applied force Close, and because first pipe diameter be greater than second pipe, flap open when minute angle will not influence fluid normal through speed Degree.

Detailed description of the invention

Fig. 1 is roots blower check valve structure schematic diagram；

Fig. 2 is flap Facad structure figure.

In figure: 1, first pipe；2, second pipe；3, flap；4, rotation axis；5, stress triangle body；6, fixed link；7, rubber Cushion rubber.

Specific embodiment

The embodiments of the present invention are described further with reference to the accompanying drawing:

As shown in Fig. 1~2, a kind of roots blower check-valves, including first pipe 1, second pipe 2 and flap 3, the first pipe 1 inner upper of road is equipped with rotation axis 4, and rotation axis 4 is equipped with stress triangle body 5, and flap 3 passes through two fixed links 6 and stress three Angle body 5 connects, and second pipe 2 connects roots blower discharge pipe.

Flap 3 and 2 contact surface of second pipe are equipped with rubber ring 7, and rubber ring 7 can prevent fluid inverse when flap 3 is closed Flow back to second pipe 2.

5 dissection surface of stress triangle body is right angled triangle, and when flap 3 is closed, a right-angle surface of stress triangle body 5 is flat It goes in horizontal plane, another right-angle surface vertical and horizontal face, and towards second pipe 2.When flap 3 is opened, the positive stream passed through Body acts on the inclined-plane of stress triangle body 5, and flap 3 and horizontal plane is made to generate minute angle, in fluid countercurrent current, flap 3 and level The minute angle in face can be such that flap 3 is more rapidly closed by the active force of the fluid of adverse current.

3 diameter of flap is slightly larger than 2 diameter of second pipe.

Two fixed links 6 are welded on flap 3.

Rotation axis 4 is parallel to horizontal plane, and is parallel to 1 cross-sectional diameter of first pipe.

1 diameter of first pipe is greater than second pipe 2.

The utility model is mounted on roots blower discharge pipe or is connect by blow valve with roots blower discharge pipe, works as fluid It is flowed out from roots blower, under fluid matasomatism, flap 3 is opened, and fluid makes flap 3 and water to 5 inclined-plane applied force of stress triangle body Plane generates minute angle, and fluid forward direction passes through check-valves；When adverse current occurs, in fluid countercurrent current, flap 3 and horizontal plane Minute angle can make flap 3 by the active force of the fluid of adverse current, flap 3 adverse current fluid matasomatism in stress triangle body 5 Fluid matasomatism quick-make under the force action of three power of power and 3 self gravity of flap of flap 3 of the power, adverse current of right-angle surface, Fluid countercurrent current is prevented to return roots blower.Because 1 diameter of first pipe is greater than second pipe 2, small angle when flap 3 is opened Degree will not influence fluid normal through the speed of check-valves.

Claims (7)

1. a kind of roots blower check-valves, including first pipe (1), second pipe (2) and flap (3), it is characterised in that: described First pipe (1) inner upper be equipped with rotation axis (4), rotation axis (4) be equipped with stress triangle body (5), the flap (3) It is connect by two fixed links (6) with stress triangle body (5), the second pipe (2) connects roots blower discharge pipe.

2. roots blower check-valves according to claim 1, it is characterised in that: the flap (3) and second pipe (2) Contact surface is equipped with rubber ring (7).

3. roots blower check-valves according to claim 1, it is characterised in that: described stress triangle body (5) dissection surface For right angled triangle, when flap (3) are closed, a right-angle surface of stress triangle body (5) is parallel to horizontal plane, another right angle Face vertical and horizontal face, and towards second pipe (2).

4. roots blower check-valves according to claim 1, it is characterised in that: flap (3) diameter is slightly larger than the Two pipelines (2) diameter.

5. roots blower check-valves according to claim 1, it is characterised in that: two fixed links (6) are welded On flap (3).

6. roots blower check-valves according to claim 1, it is characterised in that: the rotation axis (4) is parallel to level Face, and it is parallel to first pipe (1) cross-sectional diameter.

7. roots blower check-valves according to claim 1, it is characterised in that: described first pipe (1) diameter is greater than Second pipe (2).