CN2060838U - Ball valve with full ceramic bush - Google Patents

Abstract

The utility model relates to a ball valve with full ceramic bush. A handle shaft adopted by the ball valve is arranged in a gland bush, and a floating sleeve structure, etc. Is adopted by the utility model, which makes making valve spindle with ceramic into possibility. So the corrosion resistance of the ball valve is improved, the lifetime of the valve is prolonged, and the maintenance and replacement of components are convenient.

Description

Ball valve with full ceramic bush

The utility model is a kind of industrial anticorrosion valve that is used for, particularly a kind of full pottery lining ball valve.

In order to control the conveying with corrosive liquid or gas, the various corrosion resistant valves of extensive use wherein are that the ball valve of sphere is the most commonly used with the valve plug in industrial production.This ball valve is used made such as stainless steel, titanium alloy, fluoroplastic always.But above-mentioned its corrosion resistance of metallic valve often can not be satisfied the demand, and the wear-resisting property of fluoroplastic is relatively poor, all needs constantly to change.Thereby corrosion resistance has appearred using, and the pottery that wear-resisting property is all very high is done the ball valve of lining, and existing pottery lining ball valve have only inner chamber and valve plug (spheroid) to use stupalith, and the rotating shaft part is still made with metal.Like this, often, rotating shaft influences the sensitivity of valve and working life because of being corroded.The reason of not using pottery to manufacture rotating shaft is at present: pottery is crisp, frangibility after handle is subjected to impact force and brute force; Secondly, according to existing ball-valve structure, spheroid can only from fix one be sidelong into, the accumulation tolerance of parts such as overcoat, lining, spheroid is bigger, be difficult to reach with its on rotating shaft concentric.In order to make the cotter pilotage under the rotating shaft can insert the cotter way on the spheroid and strengthen tolerance clearance, then not only can influence the accuracy of operation, and can make pottery spare because of bump is fragile mutually.Use ceramic rotating shaft to prolong life of valve, must solve above-mentioned two problems.

Task of the present utility model be from structure solve that ceramic rotating shaft fractures easily and rotating shaft and spheroid on the accurate problem of cotter way contraposition, make full pottery serve as a contrast ball valve and be achieved with ceramic rotating shaft.Thereby improve the corrosion resistance of ball valve, prolong the life-span of ball valve.

This full lining ball valve of making pottery is achieved in that at the two ends socket pottery end cap of the ceramic chamber lining of tubulose, and a seal ring respectively is housed in the two end cap, and two seal rings should be tangent or identical with spheroid (valve plug) surface that is clipped in the middle of it.Lining top is provided with rotary shaft hole, and two end cap is connected with two flange plate respectively, connects with bolt between two flange plate.Between two flange plate, overcoat is housed outside the lining, can leaves certain interval between overcoat and flange plate, make overcoat become slidably parts.Overcoat top is provided with trepanning, this trepanning should be as far as possible with lining on rotary shaft hole concentric.The tubulose gland one end that has flange inserts in the trepanning, the soft packing in the trepanning can be compressed and is anchored on outer putting with screw.Handle shaft top connects handle, and all the other major parts are packed in the gland hole, and the prolate shape cotter way is arranged at the handle shaft bottom, and the direction of this cotter way should be consistent with handle orientations.The flat square cotter at the pottery rotating shaft two ends cotter way on handle shaft cotter way and the spheroid of pegging graft respectively.Handle shaft has circular groove along circumference, and its length is 1/4th of circumference, and the locating stud that is loaded on the gland sidewall enters in the circular groove.

Originally be useful for novel full pottery lining ball valve, its handle shaft major part is contained in the gland, can only rotate when driving handle, even handle does not have bigger swing yet when being subjected to up and down impact force.Consistent with handle orientations because of the flat square cotter of rotating shaft again, this swing only can make the displacement of the slight hinge-like sample of generation between handle shaft and the flat square cotter, and therefore rotating shaft can not fracture.Because overcoat can be adjusted position (nut that unclamps on the gland gets final product) between 2 flange plate, rotating shaft can be done suitably to adjust according to the physical location after the spheroid assembling, and do not need to strengthen the matching gap of cotter pilotage and cotter way, thereby improved the accuracy of operation, also avoided the damage that causes because of collision between the pottery spare.Be symmetrical arranged seal ring and end cap in the left and right sides of spheroid, be convenient to change pottery spare to correct the positional deviation of spheroid.The combination of seal ring and end cap is carried out spacing, sealing to spheroid, is convenient to seal ring and adopts expensive and high performance stupalith, can compensating by the bolt that sealing gasket effect between pottery spare and adjustment are connected two flange plate after the wearing and tearing, changes also very convenient.The utility model is achieved the full pottery lining ball valve with ceramic rotating shaft, has strengthened the decay resistance of valve, and easy to maintenance, the life-span that can improve ball valve greatly.

Be described further below in conjunction with accompanying drawing

Fig. 1 is the full lining ball-valve structure schematic representation of making pottery

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

Ceramic inner chamber is made up of lining (13), seal ring (8), end cap (7) in Fig. 1, and the middle spheroid (12) of placing has sealing gasket (10) between sealing gasket (9), seal ring and the end cap between lining both sides and the end cap.About two end caps (7) go up mounting flange (11), metal-coating (14) is housed between two flange plate, connect with bolt between flange plate.Overcoat (14) top has trepanning, after the ceramic rotating shaft (6) of packing into, and the soft filler (5) of packing in the trepanning, the gland (2) of packing into then compresses filler, and is screwed in overcoat top.Handle shaft (4) is loaded in the gland hole, and its top connects handle (1), its underpart grafting rotating shaft (6).The situation that is connected of handle shaft and gland as can be seen in the accompanying drawing 2, circular groove on the handle shaft combines with locating stud (3) handle shaft is played position-limiting action, make the operator be easy to judge the state of opening or closing of valve plug, also play preventing that handle shaft from deviating from the effect in gland hole simultaneously.After putting outside gland is fastened onto, gland compresses filler, and overcoat is fixed on the lining, prevents overcoat to horizontally slip, so fixing will being placed on of gland screw carried out after rotating shaft and spheroid and handle shaft assemble.The spacing of handle also can be taked following scheme: circularize groove at the gland sidewall along concentric plan, its length is 1/4 of gland circumference, makes handle pass circular groove.

Claims (2)

1, a kind of full pottery lining ball valve, it is characterized in that, the two ends socket pottery end cap (7) of ceramic chamber lining (13), seal ring (8) respectively is housed in the two end cap, two seal rings should be tangent or identical with spheroid (12) surface that is loaded on its centre, rotary shaft hole is arranged at lining top, two end cap is connected with two flange plate (11) respectively, two flange plate connect with bolt, between the flange plate, overcoat (14) is housed outside the lining, gapped between overcoat and flange plate, the overcoat top is provided with trepanning, tubulose gland (2) one ends that have flange insert in the trepanning, the handle shaft of packing in the gland hole (4), and handle shaft top connects handle (1), the prolate cotter way is arranged at the handle shaft bottom, the direction of cotter way should be consistent with handle orientations, and there are flat square cotter peg graft respectively handle shaft and spheroid (12) in ceramic rotating shaft (6) two ends, and handle shaft has circular groove along circumference, its length is 1/4 of circumference, and the locating stud (3) that is loaded on gland (2) sidewall enters in the circular groove.

2, according to the described full pottery lining ball valve of claim 1, it is characterized in that gland (2) is shaped on circular groove along circumference, its length is 1/4 of circumference, and handle (1) passes this circular groove.

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