CN2388442Y

CN2388442Y - Butterfly slow-closure type check valve

Info

Publication number: CN2388442Y
Application number: CN 99224225
Authority: CN
Inventors: 刘少强; 王会良
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-23
Filing date: 1999-06-23
Publication date: 2000-07-19
Anticipated expiration: 2009-06-23

Abstract

The utility model relates to an improvement on a micro-resistance and slow-closure type check valve. The interior of a valve body is processed with a sealing opening, and the contact surface of the sealing opening and a valve clack is processed with a cone angle. A valve clack shaft is positioned on one fourth part of the minimum diameter in the valve body. The valve clack forms an angle of 8 DEG-12 DEG with a water inlet and outlet flange of the valve body. The contact part of the valve clack and the sealing opening is provided with a sealing ring. The utility model has the advantages of small volume, low cost, small drag coefficient, small water hammer, etc.

Description

The butterfly Tiny Drag Slow Shut Check Valves

The utility model relates to a kind of improvement of Tiny Drag Slow Shut Check Valves.

The Tiny Drag Slow Shut Check Valves that generally adopts on present water supply and sewerage pipeline and the IE Industrial Engineering pipeline, the refluence of water and to eliminate on the performances such as destructive water hammer effect fine in preventing pipeline, but because its flap (hyoplastron) is positioned at valve body water-output flange side, and the flap axle is positioned at a side of flap, like this when current in the valve body by the time resistance that flap is opened very big, exist defectives such as volume weight, poor sealing performance, price height.

The utility model purpose provides a kind of flap and is positioned at valve body, and volume is little, the butterfly Tiny Drag Slow Shut Check Valves that performance is good.

The utility model is by valve body, flap, cylinder body, the inner chamber piston, the trace modulating valve, one-way valve is formed, be processed with sealed mouth in the valve body, be processed into and become 12-20 degree cone angle shape with valve body intake-outlet center line at sealed mouth and the surface of contact place of flap, the flap axle is positioned at 1/4 place, valve body sealed mouth minimum diameter top and becomes vertical with the intake-outlet center line, flap becomes 8-12 degree angle with valve body intake-outlet flange, the inner chamber piston is positioned at the cylinder body of valve inleting water mouth flange below and becomes 30-38 degree inclination angle with the intake-outlet center line, is provided with seal ring with the sealed mouth contacting point on the flap.

The utlity model has following advantage:

1, water hammer is eliminated in damping, prevents aqueous reflux, need not personnel management and nurse after the debugging.

2, compare with other Tiny Drag Slow Shut Check Valves, cost reduces about 40%, and valve weight descends about 60%, and the valve body external form is identical with institute connecting tube flange outer diameter, no floor space.

3, the flap axle is positioned at position, 1/4 place, valve body sealed mouth minimum diameter top, twoly opens, two closing, and opens flexibly, and resistance coefficient is little, and power consumption is low.

4, sealed mouth and flap adopt two angle cone sealings, good sealing effect.

Accompanying drawing 1 is the utility model master pseudosection.

Accompanying drawing 2 is looked part sectioned view for the utility model left side.

Below in conjunction with accompanying drawing the utility model is further described, structure of the present utility model and principle are to realize like this, be processed with sealed mouth 2 in the valve body 1, the sealed mouth oblique angle is a 12-20 degree cone angle shape, flap axle 4 is positioned at 1/4 place, valve body sealed mouth minimum diameter top and becomes vertical with the intake-outlet center line, flap 3 is installed on the flap axle, flap becomes 8-12 degree angle with valve body intake-outlet flange, because the effect of flap axle, the formation flap is two when work opens, having a double meaning, open flexibly, resistance coefficient is little, the sealed mouth place is processed with high-abrasive material and forms two angle cone sealings, with the sealed mouth contacting point seal ring 6 is installed on the flap, adopts materials such as rubber.Inner chamber piston 5 is positioned at the cylinder body of valve inleting water mouth flange below and becomes 30-38 degree inclination angle with the intake-outlet center line, at first open one-way valve 7 before the turn on pump, adjust micro-modulating valve 8 according to working pressure, utilize the working pressure effect of water in the pipeline, flap 3 is opened water is passed through, valve body 1 chamber pressure water flows to the back cavity of inner chamber piston 5 by one-way valve, piston is released from inner chamber of cylinder block, when current stop (water pump is out of service), because the effect of flap deadweight and aqueous reflux is closed flap automatically, because piston is in the release location, withstand flap, make the flap can not be with the valve port Close All, surplus have gap, 20% left and right sides, makes current by having weakened water hammer pressure, eliminate destructive water hammer, played the effect of micro-resistance slowly-closed.

Claims

1, butterfly Tiny Drag Slow Shut Check Valves, form by valve body, flap, cylinder body, inner chamber piston, micro-modulating valve, one-way valve, it is characterized in that being processed with in the valve body 1 sealed mouth 2, be processed into and become 12-20 degree cone angle shape with valve body intake-outlet center line at sealed mouth and the surface of contact place of flap 3, flap axle 4 is positioned at 1/4 place, valve body sealed mouth minimum diameter top and becomes vertical with the intake-outlet center line, flap becomes 8-12 degree angle with valve body intake-outlet flange, and inner chamber piston 5 is positioned at the cylinder body of valve inleting water mouth flange below and becomes 30-38 degree inclination angle with the intake-outlet center line.

2,, it is characterized in that being provided with seal ring 6 with the sealed mouth contacting point on the flap according to the described butterfly Tiny Drag Slow Shut Check Valves of claim 1.