CN2072178U

CN2072178U - Non-return valve

Info

Publication number: CN2072178U
Application number: CN 90218443
Authority: CN
Inventors: 王心超
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1991-02-27

Abstract

The utility model provides a non-return valve, which can control the on-off of fluid in a pipeline. The utility model is characterized in that a sealing spacing sleeve which can isolate waterway from an opening and closing mechanism is arranged in a valve body; a valve rod and a valve clack arranged in the opening and closing mechanism are positioned at two sides of the spacing sleeve and are combined into a whole with each other. The utility model has the characteristics of simple structure, no leakage at the sealing position of the valve rod, long structural lives of bellows which are adopted by the spacing sleeve, and non-perishable damage. The non-return valve solves and overcomes the insufficiency and the defects existing in the prior art, has the advantages of easy use, high durability, wide application range, etc., and has good sealing effect when directly using in a lifting valve and a rotary valve.

Description

Non-return valve

The utility model relates to a kind of unidirectional stop valve that is used for pilot line fluid break-make.

One-way control valve is many applications such as The modern industry, agricultural and daily life, and a kind of common stop valve that people are comparatively common, thereby its structure type and specification kind are a lot, its operation power comprise electronic, manual, foot-operated etc. multi-form.Only be example with the foot valve that uses in the bathroom, the defective of this kind valve is in valve control both mobile valve rod in position and valve seal joint, and leakage point is arranged, and causes the control position to leak because of poor sealing.We can say that existing various one-way valve does not have fine addressing this problem, there is above-mentioned spill and leakage phenomenon in one-way valve, segment fluid flow is run off in vain, cause unnecessary economic waste, have in addition therefore can influence ordinary production and life, some also can cause environmental pollution.

For solving this type of problem, CN8820466.7 discloses a kind of shower foot valve, these valve characteristics are that an elastic seal cartridge that is communicated with the turnover water route is set in valve body, current can only be flowed in the sealing cover, keep current and valve opening and closing mechanism to isolate, open or cut off current under external force by opening/closing mechanism.We can say that this design is undoubtedly efficient ways from eliminating the foot valve leakage point, yet, because its flap directly acts on the stuffing box gland fixed position, under external force acted on repeatedly, stuffing box gland and flap contact position wore and tore easily, and can be progressively tired, aging and leak.Therefore, there is certain problem in this valve aspect in working life.In addition, this valve is limit by structural design, and application area is narrower.

The utility model exists leakage point and the defective that overcomes above-mentioned prior art to design for solving one-way valve, and its purpose is to utilize the prior art design philosophy, for society provides a kind of one-way control valve that does not have leakage point, long service life, wide application.

For finishing the utility model above-mentioned purpose, in still having adopted, establishes by this one-way valve elastic packing spacer (film), make the isolated technological scheme in valve leak position and water route, assembly relation and prior art have substantive difference between different is its valve rod (comprise promote and rotate two kinds of structures), flap and sealing spacer (film) three.Without exception, the parts of forming this valve should comprise assembling all-in-one-piece valve body 1, valve body end cap 2, valve rod 3, sealing spacer (film) 5, flap 8 etc., feature of the present utility model is that said valve rod 3 is positioned at sealing spacer (film) 5 both sides with flap 8, flap 8 is positioned at valve stem tip, assemblies a sealing leakage preventer mutually with Sealing 6,7 between the three and is arranged in the valve body 1.Obviously, between above-mentioned spacer (film) 5 and the valve body 1, and the assembly relation between spacer (film) 5 and valve rod 3 and the flap 8, visual one-way valve specific design and valve rod type are corresponding to be determined, when adopting poppet valve (as foot valve) and rotary valve (as water tap), valve body 1 and valve rod 3 structures should be different to some extent.

For convenient narration,, the utility model structural feature is described below in conjunction with the specific embodiment that accompanying drawing provided.By poppet valve shown in the figure as can be seen, the main-body structure of one-way valve is same as the prior art, and valve rod 3, spacer 5 and the similar flap of valve stem tip nut 8() assembly structure is also same as described above, just consider valve closing, between valve rod 3 and spacer 5, install a Returnning spring 4 additional and be enclosed within on the valve rod 3, one-way valve is closed automatically by spring 4.Certainly, also can not install this spring additional, and when valve rod 3 vertical assemblings, add big nut 8 weight and one-way valve is closed automatically by its gravity.One-way valve advances, and water outlet direction direction shown in arrow among the figure is identical.

As changing poppet valve into rotary valve, valve rod 3 can be divided into two sections, and sleeve together, make the epimere of valve rod should be the rotary opening and closing structure, its hypomere is for promoting on-off structure, whole valve opening and closing relies on the valve rod epimere to adjust the hypomere displacement, and at this moment, one-way valve water-in and water-out direction direction shown in arrow among the figure is just in time opposite.Here the simple structure of spiral valve rod is no longer done introduction.

Fig. 1 is the utility model poppet valve arrangements partial cutaway diagrammatic sketch.

The utility model employing scheme is very simple, spacer 5 can be fixed on valve rod 3 one ends with the one end, and the other end is fixed between valve body 1 and the valve gap 2 according to valve body 1 structure, makes it to form a seal chamber.Above-mentioned spacer 5 can adopt high elasticity rubber to make, and spacer 5 also can directly manufacture bellows, prolongs spacer and one-way valve working life.Owing to adopt above structure, fundamentally eliminate original one-way valve leakage point seepy question again, in order to energy saving, overcome waste.The utility model can be according to the requirement of one-way valve different designs, and selected sealing spacer (film) structure reaches rigging position in valve body, enlarges its application area.

Claims

1, a kind of one-way valve that is used for pilot line fluid break-make, its valve body 1, end cap 2, valve rod 3, sealing spacer (film) 5, flap 8 are assembled into one, the utility model feature is that said valve rod 3 is positioned at spacer (film) 5 both sides with flap 8, flap 8 is positioned at valve rod 3 tops, assemblies a seal arrangement with seal 6,7 between the three and is located in the valve body 1.

2,, it is characterized in that being provided with Returnning spring 4 between said valve rod 3 and the spacer 5 is sleeved on the valve rod 3 according to the described one-way valve of claim 1.

3,, it is characterized in that said valve rod 3 is divided into epimere screw rod and hypomere lifting arm, both suit one according to the described one-way valve of claim 1.

4, according to claim 1,2 or 3 described one-way valves, its feature is bellowss at said spacer 5.