CN102966751A - U-shaped ball valve for slurry mixing and ash discharging - Google Patents

Abstract

The invention discloses a U-shaped ball valve for slurry mixing and ash discharging. The U-shaped ball valve comprises a valve body, a ball body and a lower end cover, wherein the lower end of the valve body is provided with the lower end cover; the lower end cover is connected with a lower stationary shaft through a set screw; the lower stationary shaft is movably connected with a rotating shaft at the bottom of the ball body through a lower shaft sleeve; the rotating shaft at the top of the ball body is connected with the bottom end of a valve rod through an upper shaft sleeve; and the valve rod penetrates through a filler system structure and the rear top end of a bracket to be connected with an executing mechanism. The U-shaped ball valve has the beneficial effect that the design of a non-eccentric wear-resistant ball body with a U-shaped flow passage port, a streamline-shaped outlet and valve cavity ball hiding is adopted by the designed and developed U-shaped ball valve for slurry mixing and ash discharging. A valve seat with a scraper port is designed to be provided with a labyrinth type disc spring pre-tightening mechanism. The U-shaped ball valve has the advantages of capability of effectively solving the problems, low operation failure rate, capability of greatly prolonging the service life of the valve, compact structure, light weight, capabilities of reducing the manufacturing cost and realizing mounting at any position, quick opening and closing and remote control and the like.

Description

A kind of mixed slurry unloads ash U-shaped ball valve

Technical field

The present invention relates to a kind of ball valve, particularly a kind of mixed slurry unloads ash U-shaped ball valve.

Background technique

Power plant's coal slurry transporting system, aluminum oxide industry ore in sand form slip pipeline, mixed slurry, the unloading valve that ash wait to use unloads the stokehold in steel mill, and that uses in the blast furnace flue unloads grey dust removing valve, and existing can have single valve seat fixing ball valve (Unloading ball valve), eccentric half-ball valve, a Y shape pulp stock valve etc. for what select; Owing to contain the hard solid matter of a large amount of graininess in the medium, in the valve opening and closing process, often can produce particulate matter and be mixed between the valve seal pair, gently then poorly sealed, serious meeting causes valve damage to lose efficacy.The solid particle medium can deposit, lump at valve cavity, often can cause the stuck phenomenon of open-shut device and valve pocket bonding.In addition, the solid dielectrics such as the coal dust of these high hardness, lime-ash can wash away valve sealing face and closure member surface long term under high flow rate; Flue dust in the flue system and harmful gas also can form coking, fouling etc. at valve sealing face and closure member surface, all sealing and the life-span of valve are had a negative impact.

Summary of the invention

For the shortcoming of existing ball valve, the invention provides a kind of novel mixed slurry and unload ash U-shaped ball valve.

To achieve these goals, institute of the present invention Adopts measure

A kind of mixed slurry unloads ash and uses the U-shaped ball valve, comprises valve body, spheroid, lower end cap, and described valve body lower end is provided with lower end cap, and lower end cap is connected with lower stationary axle by adjusting screw; Lower stationary axle is flexibly connected by Lower shaft sleeve and spheroid bottom rotating shaft; The rotating shaft of spheroid top is connected with the valve rod bottom by Upper shaft sleeve; The top was connected with actuator after valve rod passed filling system structure, support; Actuator is arranged at support, and frame bottom is connected with the valve body top by the filling system structure;

Be provided with U-shaped ball mouth structure on the described spheroid centre of sphere direction; Simultaneously, spheroid contacts with scraper; Scraper is fixed on the sealing surface of seat; Sealing surface of seat is arranged on the valve inner valve seat by mazy type dish spring pre-tightening mechanism.

Beneficial effect of the present invention: " mixed slurry unloads ash U-shaped ball valve " of designing and developing, adopt the without acceptance of persons wear-resisting spheroid with U-shaped runner mouth, the streamline outlet is hidden the ball design with valve pocket.Band is scraped the valve seat of the edge of a knife, and design is with mazy type dish spring pre-tightening mechanism.Can effectively overcome the above problems, the operation troubles rate is low, has greatly improved valve working life.Its compact structure, lightweight, when reducing manufacture cost, also possess and can install at an arbitrary position, fast opening and closing, the advantages such as telecontrol.

Description of drawings

Fig. 1, the present invention faces cross-sectional view.

Fig. 2, mazy type dish spring pre-tightening mechanism structural representation of the present invention.

Fig. 3, spherical crown sealing surface of the present invention are positioned at valve pocket " ball chamber, Tibetan " schematic representation.

Embodiment

A kind of mixed slurry unloads ash and uses the U-shaped ball valve, as shown in Figure 1, comprises valve body 1, spheroid 2, lower end cap 3, and described valve body 1 lower end is provided with lower end cap 3, and lower end cap 3 is connected with lower stationary axle 5 by adjusting screw 4; Lower stationary axle 5 is flexibly connected by Lower shaft sleeve 6 and spheroid 2 bottom rotating shafts; Spheroid 2 top rotating shafts are connected with valve rod 11 bottoms by Upper shaft sleeve 8; Valve rod 11 passes filling system structure 9, support 10 rear tops are connected with actuator 12; Actuator 12 is arranged at support 10, and support 10 bottoms are connected with valve body 1 top by filling system structure 9; In the actual implementation process of patent, action can be finished steadily, be opened and closed reliably to valve under the drive of actuator 12, realizes connection and the cut-out of pipeline.For mixing slurry, unloading the operating condition designs such as grey, medium enters valve pocket by the entrance point of straight-through runner to this valve, discharges smoothly from the outlet end of increasing design by the streamline transition region, can not cause medium to deposit and " freezing " phenomenon at lumen fully.Be applicable to the media such as solid lime-ash, slurry, flue dust fully.Simultaneously, be provided with U-shaped ball mouth structure 7 on spheroid 2 centre of sphere directions; As shown in Figure 2, simultaneously, spheroid 2 contacts with scraper 13; Scraper 13 is fixed on the sealing surface of seat 14; Sealing surface of seat 14 is arranged on valve body 1 inner valve seat by mazy type dish spring pre-tightening mechanism 15.The belleville spring of mazy type dish spring pre-tightening mechanism 15 adopts Incoel X750 material to make, and mazy type dish spring pre-tightening mechanism 15 can effectively stop entering of particulate matter in the medium, prevents spring failure; Simultaneously, scraper 13 is under the effect of mazy type dish spring pre-tightening mechanism 15 power, and the sphere of scraper 13 and spheroid 2 is capable to become seal pressure, and sealing is reliable, can realize " zero reveals " sealing; Scraper 13 is made by pile-up welding hard alloy, attachment in the valve opening and closing process on the sphere of scraped spheroid 2, simultaneously, because the without acceptance of persons structure of U-shaped ball mouth structure 7, make between the sphere of valve seat and spheroid 2 and can not produce the gap, prevent that Medium Inclusion is to causing valve to be revealed between the sealing surface.In addition, the cemented carbide of scraper type valve base sealing surface build-up welding itself possesses lower friction factor, and has the difference of hardness more than the hardness of HRC 5 degree between the sphere of surfacing WC, the valve seat back side is equipped with belleville spring, can be in resilience under the overload, therefore in striking off, can not damage sphere, substantially can not exert an influence to the valve opening and closing moment of torsion.Under the valve wide open state, the U-shaped ball mouth structure 7 of spheroid 2 is straight-through with valve seat bore, and the spherical crown sealing surface is positioned at valve pocket and " hides the ball chamber ", as shown in Figure 3; Therefore sealing surface of seat 14 and spheroid 2 sealing surfaces all can not be subjected to medium to washing away, can the Effective Raise valve working life; Simultaneously, in the end of valve stem sleeve and medium contact up and down dust-proof seal ring is housed, can stops solid particulate matter to enter, prevent valve rotary part inordinate wear or obstruction " locking "; Owing to be provided with independently stuffing-box on the valve body 1, prevent that blowing out function can prevent that valve rod from " blowing out " at the quilt of pressure medium effect so this ball valve system also has valve rod.Simultaneously, spheroid 2 adopts spline joints with valve rod 11, and reliable transmission, centering have precisely avoided selecting material and the unmatched problem of medium applicability of the standard key that key connects simultaneously; Open and close rapid aspect: 90 ° of revolutions can be finished the keying of valve, can also realize by installing driving mechanism additional valve quick closing valve, open soon telecontrol etc.This patent valve volume is little, lightweight: owing to half less than the conventional ball valve spheroid of U-shaped spheroid volume, valve body is monolithic whole formula structure, and compact structure greatly reduces valve weight, saves installing space, can reduce cost for the user; At last, this valve dew point that leaks is few: valve body is the monolithic whole formula, flange seal and leakage problem in not existing, and the valve body outside is without the need for other perforate.

Those skilled in the art's simple change and replacement all are within protection scope of the present invention in related domain.

Claims (2)

1. a mixed slurry unloads ash and uses the U-shaped ball valve, comprises valve body (1), spheroid (2), lower end cap (3), it is characterized in that described valve body (1) lower end is provided with lower end cap (3), and lower end cap (3) is connected with lower stationary axle (5) by adjusting screw (4); Lower stationary axle (5) is flexibly connected by Lower shaft sleeve (6) and spheroid (2) bottom rotating shaft; Spheroid (2) top rotating shaft is connected with valve rod (11) bottom by Upper shaft sleeve (8); The top was connected with actuator (12) after valve rod (11) passed filling system structure (9), support (10); Actuator (12) is arranged at support (10), and support (10) bottom is connected with valve body (1) top by filling system structure (9).

2. described a kind of mixed slurry unloads ash and uses the U-shaped ball valve according to claim 1, it is characterized in that, is provided with U-shaped ball mouth structure (7) on described spheroid (2) centre of sphere direction; Simultaneously, spheroid (2) contacts with scraper (13); Scraper (13) is fixed on the sealing surface of seat (14); Sealing surface of seat (14) is arranged on valve body (1) inner valve seat by mazy type dish spring pre-tightening mechanism (15).

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