CN2154391Y

CN2154391Y - Check valve

Info

Publication number: CN2154391Y
Application number: CN 93236355
Authority: CN
Inventors: 包明伦
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-24
Filing date: 1993-02-24
Publication date: 1994-01-26
Anticipated expiration: 2003-02-24

Abstract

The utility model relates to a novel check valve, which is composed of a valve body, a valve cap, a valve seat with a guide cylinder, a valve flap with a guide rod, a spring, a support frame, etc. The utility model is mainly used for the water supply system of an industrial boiler and a steam pipe line system. Compared with prior lift type check valve, the utility model can effectively decelerate the impact abrasion between the valve flap and the valve seat, eliminate the unequal abrasion and improve closing sealing performance and service life of the valve because the valve flap and the valve seat have a good guide and the buffering function is added. The utility model has the advantage of simple structure, and has no directional requirement on installation; the valve flap is closed by spring force and the opposite pressure of the medium.

Description

Check valve

The utility model relates to a kind of safety check.

Be widely used in the Lift check valve of industrial boiler water supply and steam pipe system at present, the guide sleeve of its flap is fixed on the valve gap, because the error of processing and assembling, be difficult to guarantee the concentricity of flap and valve base chamber, in addition, it is oversize that guide rod stretches out guide sleeve, and flap and valve base chamber have the bigger gap of rocking.Therefore, at valve closing in a flash, owing to be subjected to the reverse impact power of medium or the effect of gravity, make the flap Off center, cause flap often to be clashed into and uneven wear, so that take place to leak and damage, shorten valve working life.

The purpose of this utility model is to provide a kind of medium that can slow down to impact, and makes the safety check of flap less wear and uniform wear.

Below in conjunction with accompanying drawing technical solution of the present utility model is described:

The sequence number of marking is expressed as follows respectively in the accompanying drawing:

1 valve body, 2 throttle orifices, 3 bolts, 4 valve seats, 5 pads, 6 flaps, 7 supports, 8 spring seats, 9 valve gaps, 10 springs, 11 guide cylinders, 12 guide rods, 13 openings, 14 openings.

Valve seat 4 has guide cylinder 11, is provided with throttling pore 2 in the end of guide cylinder 11, and valve seat 4 is provided with several MEDIA FLOW through holes 13 in the periphery of guide cylinder 11; Support 7 is fixed on the valve seat 4, is provided with MEDIA FLOW through hole 14 around it; Flap 6 has guide rod 12, and guide rod 12 inside are processed into hollow, and spring 10 places guide rod 12 inside, and the other end is fixed on the spring seat 8 above the support 7.Above-mentioned valve seat 4 and guide cylinder 11, flap 6 and guide rod 12, support 7 grades all place in the safety check housing that valve body 1 and valve gap 9 form, and valve body 1 and valve gap 9 are connected by bolt, and there is pad 5 its contact position.When medium flow to safety check by the L direction, the medium with certain pressure overcame the elastic force of Returnning spring 10 promptly by several openings 13 in the valve seat, open flap 6, by the MEDIA FLOW through hole 14 above the support 7, flow out valve, the inside of guide cylinder 11 is full of medium simultaneously.

When the pressure medium of L direction disappears, flap 6 is closed under the effect of the backpressure of medium and spring 10 elastic force, the guide rod in a flash 12 of cutting out at flap 6 all enters guide cylinder 11, and flap 6 and valve seat 4 just can keep good concentricity like this, uneven wear can not occur basically.In addition, the medium that is full of in the guide rod 11 can only slowly flow out from the throttle orifice 2 of guide cylinder 11 ends under the compressing of guide rod 12, and the closing velocity of flap 6 slows down like this, thus, alleviates the brinelling with valve seat 4, prolongs the working life of valve.

When pipeline do not have medium by the time, flap 6 keeps closed condition by the elastic force of spring 10, therefore, is installing directionless requirement.

Embodiment: latus rectum 40mm, this safety check of nominal pressure 1.6MP, its valve body 1, valve gap 9 are all cast with magnesium iron and are formed, valve seat 4, usefulness 2Cr13 is stainless steel integrated processes for guide cylinder 11, and usefulness 2Cr13 is stainless steel integrated processes for flap 6, guide rod 12, and heat-treats.Spring seat 8, support 7 usefulness 2Cr13 stainless steels are made, and spring 10 usefulness 4Cr13 stainless steels are made, and pad 5 is a rubber asbestos plate.

Claims

1, a kind of safety check, by valve body, valve gap, valve seat, compositions such as flap is characterized in that: place the valve seat 4 in the safety check housing of being made up of valve body 1 and valve gap 9 to have guide cylinder 11, flap 6 has guide rod 12, and support 7 is installed on the valve seat 4.

2, a kind of safety check according to claim 1 is characterized in that: guide cylinder 11 1 ends are provided with throttling pore 2, are provided with several openings 13 in the valve seat 4.

3, a kind of safety check according to claim 1 is characterized in that: guide rod 12 is for hollow, and Returnning spring 10 is equipped with in its inside.

4, a kind of safety check according to claim 1 is characterized in that: around the support 7 several openings 14 are arranged, its end is provided with spring seat 8.