CN2307963Y

CN2307963Y - Double-eccentric hemisphere valve

Info

Publication number: CN2307963Y
Application number: CN 97241180
Authority: CN
Inventors: 宋效法; 戚进宝; 王喜庭
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-15
Filing date: 1997-08-15
Publication date: 1999-02-17
Anticipated expiration: 2007-08-15

Abstract

The utility model relates to a double-eccentric hemisphere valve, comprising a valve body, a valve seat and a valve clack, a retaining sleeve and a valve rod. The utility model is characterized in that the sealing pair of the valve clack and the valve seat adopts a sphere endless belt for sealing. The turning axis O of the valve clack has two eccentricities E and e, and E=2e. Because of the eccentric arrangement of the turning axis of the valve clack, the valve clack is easy to open and close. When rotated, the valve clack generates closing and compacting functions with the valve seat, removing any scale attachment which influences the closing and the sealing, and reaching the preset position of the valve seat and the valve clack smoothly to tightly close the sealing face, so the reliability of the valve as a pipeline control mechanism is ensured. The valve is especially suitable for pipelines delivering ore pulp and solution which contains impurities and is easy to scale.

Description

The double eccentric-pieces semispherical valve

The utility model relates to a kind of valve, relates in particular to a kind of double eccentric half ball valve, and it is suitable for being installed on the conveyance conduit of mixed mediums such as solution and ore pulp uses.

Existing valve is of a great variety, but is used for its performance of the employed valve of mixed medium pipeline such as solution and slag at present and structure exists many deficiencys, as poorly sealed, working life short, easily fouling and not easy to clean etc. in the valve.Chinese patent ZL942077318 discloses a kind of name and has been called " hard seal eccentric semi ball face valve ", adopts three off-centre on its structural principle, and its throw of eccentric is B, C, D and C＞D, can cause the valve body distortion when closing, and is difficult to guarantee its sealability.These problems promptly cause the working life of valve not long, and easily have an accident, and influence pipe network and normally move.

The double eccentric-pieces semispherical valve that the purpose of this utility model designs at above-mentioned the deficiencies in the prior art part just, this ball-valve structure is reasonable, good sealing effect, be convenient to open and close, can get rid of the impurity, the foulant that influence hermetically closing automatically, wear-resistant, long service life.

The purpose of this utility model realizes by following measure: this double eccentric-pieces semispherical valve comprises valve body, is installed in valve seat and the flap in the valve body, fixed muffle and the valve rod formation that is used to install valve seat, wherein: the sealing pair of flap and valve seat adopts sphere--the endless belt sealing, the revolution axle center O of flap had both setovered its distance of valve flowing channel center line one side for E, there is a segment distance e with flap sphere centre of sphere O1 again, and E=2e.

In the utility model, the ball chamber, Tibetan of placing flap when body cavity has to be used for the flap unlatching; The revolution axle center O of flap equates apart from valve body both ends of the surface distance; The valve body both ends of the surface are flange-type structure, so that be connected with institute adapter road; The outlet end of valve body is tapered, can prevent to produce eddy current, reduces flow passage resistance force of waterproof.

Sealing pair of the present utility model is owing to adopt the sealing of sphere endless belt, open-shut device adopts the tight principle of eccentric lock, eccentric--wedging mechanism, eccentric E of bidimensional and e, and E=2e, therefore, the product manufacturing is simple, makes this valve be easier to open and close, and sealability is better, the Seal Design index that has surpassed PN=4MPa, the actual sealing load of this product has reached 6.5MPa.Also be provided with a ball chamber, Tibetan of placing flap on the valve body of this valve, make flap not account for flow channel space in the enable possition, reduce flow passage resistance force of waterproof.Be provided with because the revolution axle center of this flap is eccentric, flap is built generation with valve seat and is closed and pressuring action when rotating, can wipe out the fouling attachment that all influences are closed and sealed, reach the precalculated position of valve seat and flap smoothly and sealing surface is closed, thereby guarantee the reliability of this valve as the pipeline control mechanism, this valve is specially adapted in the solution line of transfer ore pulp and impure easy fouling, precipitation.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a structural front view of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

The utility model is further described below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2: this double eccentric-pieces semispherical valve comprises valve body (1), be installed in valve seat (3) and the flap (2) in the valve body, the fixed muffle (5) that is used to install valve seat and valve rod (6) formation, valve seat (3) is fixed in the fixed muffle (5) by adjusting pressure ring (4), flap (2) adopts sphere with the sealing pair of valve seat (3)--the endless belt sealing, the revolution axle center O of flap (2) had both setovered its distance of valve flowing channel center line one side for E, there is a segment distance e with flap sphere centre of sphere O1 again, and E=2e; The ball chamber, Tibetan (7) of placing flap when body cavity has one to be used for the flap unlatching; The revolution axle center O of flap equates apart from valve body both ends of the surface distance; Valve body (1) both ends of the surface are flange-type structure, so that be connected with institute adapter road; The outlet end of valve body is tapered.

The sealing pair of this valve can adopt hard sealing according to service condition, as using Cr-Mn-W alloy abrasion resistance material, bainite ductile iron, ionic nitrizing treatment alloyed steel; Also can adopt soft sealing structure, as lining rubber or plastics, to be applicable to the different medium requirement.

Claims

1, a kind of double eccentric-pieces semispherical valve, it comprises valve body (1), be installed in valve seat (3) and the flap (2) in the valve body, the fixed muffle (5) that is used to install valve seat and valve rod (6) formation, of the present utility model being characterised in that: the sealing pair of flap and valve seat adopts sphere--the endless belt sealing, the revolution axle center O of flap (2) had both setovered its distance of valve flowing channel center line one side for E, there is a segment distance e with flap sphere centre of sphere O1 again, and E=2e.

2, double eccentric-pieces semispherical valve according to claim 1 is characterized in that: the ball chamber, Tibetan (7) of placing flap when valve body (1) inner chamber has to be used for flap (2) unlatching.

3, double eccentric-pieces semispherical valve according to claim 1 is characterized in that: the revolution axle center O of flap (2) equates apart from valve body both ends of the surface distance.

4, double eccentric-pieces semispherical valve according to claim 1 is characterized in that: valve body (1) both ends of the surface are flange-type structure.

5, double eccentric-pieces semispherical valve according to claim 1 is characterized in that: the outlet end of valve body (1) is tapered.