CN2866999Y

CN2866999Y - Antiseizing dry lime metering valve

Info

Publication number: CN2866999Y
Application number: CN 200520098661
Authority: CN
Inventors: 潘南林; 曲玉强
Original assignee: SJS Ltd
Current assignee: SJS Ltd
Priority date: 2005-11-02
Filing date: 2005-11-02
Publication date: 2007-02-07
Anticipated expiration: 2015-11-02

Abstract

The utility model involves an antisticking dry powder metering valve for the flow-control of the dry powder conveying, comprising a valve body, a spool, a rotation shaft, a bearing block coaxially connected with the valve body, a bearing assembly via which the rotation shaft is connected with the bearing block, a respiration valve mounted outside the valve and arranged in the feeding line of the valve. And wherein the spool is constructed through connecting the barrel segment with the cylindrical slice, the barrel segment is connected with the rotation shaft, and the cylindrical slice is tangent with the acting surface of the valve feed opening. The cavity entine of the barrel segment where the spool cylindrical slice is arranged comprises two cylinders tangentially connected with a proper center distance; wherein the feed opening is arranged on one of the cylinders, and this cylinder is coaxial with the spool, the axes of the other cylinder is arranged on the extended line of the feed opening center. The latter cylinder radius is equal to or longer than the former one. The utility model enlarges the spacing between the spool and the entine of the valve body when the valve works, solving the problem that the valve is easily to be jammed and fast abraded.

Description

Anti-sticking dry ash metering valve

Technical field:

The utility model is used for the flow control that reinforcing oil well equipment dry ash is carried.

Background technique:

In the well cementing operation in ocean and oil field, land, commonly used to the mud that can control the automatically equipment that is mixed, this equipment can be according to the density of setting, automatically and continuously clear water and solid carbon dioxide plaster is mixed and is pumped to the down-hole.The dry ash metering valve is the vitals in this equipment, and its function is to regulate the feed rate of solid carbon dioxide plaster according to the instruction of computer system automatic control circuit.The structure of dry ash metering valve, can be referring to Fig. 1, it comprises valve body 1, spool 2, rotating shaft 3, the bearing unit 6 that links with the valve body 1 coaxial bearing support that links 5, with rotating shaft 3 and bearing support 5, in valve outside and valve body 1 link and be positioned at inhalation valve 4 on the feeding-passage of valve, described spool is linked to each other with the cylindricality fragment by column body segment and constitutes, column body segment and rotating shaft 3 link and are point of attachment, the cylindricality fragment is the working position, and it is cut in material feeding mouth 7 rotations on the valve body 1.In the equipment of being mixed, the rotating shaft 3 of this valve links to each other with angular displacement sensor with power source, and control circuit will make the two link to each other with computer.When in check drive power source rotating shaft 3 forward and reverse rotations, the cylindricality sheet of spool 2 can change the area of passage of valve body material feeding mouth, thereby realizes the adjusting of dry powder flow.

Because there is a fixed gap 8 in technology between the working surface of material feeding mouth 7 and the spool cylindricality sheet on the valve body 1, see Fig. 2.The dry cement powder that is used for being mixed contains impurity such as little ore deposit quarrel, Shi Li unavoidably, and in valve open or pass closed procedure, they are easy to be stuck in the space 8, spool can not normally be rotated, even be stuck, quality and manufacturing efficiency that influence is mixed also make valve cross quick-wearing simultaneously.

Summary of the invention:

The purpose of the utility model, the problem of blocking when being the work of solution valve between spool and the valve body.

Above-mentioned purpose is to be achieved by such improvement: the inwall of the part relative with material feeding mouth of housing is done extension away from the material feeding mouth direction, and promptly the eccentric valve body structure makes the progressively expansion of the space of spool cylindricality sheet when opening material feeding mouth and between the valve interior wall.Concrete structure of the present utility model is: anti-sticking dry ash metering valve, comprise valve body, spool, rotating shaft, with the coaxial bearing support that links of valve body, the bearing unit that rotating shaft and bearing support are linked, outside valve, link and be positioned at inhalation valve on the feeding-passage of valve with valve body, described spool is linked to each other with the cylindricality fragment by column body segment and constitutes, column body segment and rotating shaft link, cylindricality fragment and valve body material feeding mouth working surface are tangent, it is characterized in that, valve body section at spool cylindricality sheet place, its cavity inner wall is cut to connect at a distance of suitable centre distance by two cylndrical surface and is constituted, during meeting, opens material feeding mouth therein on the cylndrical surface, this cylndrical surface is coaxial with valve core, the axle center of another cylndrical surface is positioned on the elongation line at material feeding mouth center, and its radius is equal to or greater than the radius of aforementioned cylndrical surface.

Have above-mentioned improved dry powder metering valve, when the spool Unscrew, the space between itself and the valve body becomes greatly gradually, is beneficial to impurity and passes through smoothly, avoids blocking the wearing and tearing with valve, thereby more adapts to the requirement of computer continuous control, and the serviceability of valve is improved.

Description of drawings:

Fig. 1 is the axial sectional view of dry ash metering valve;

Fig. 2 is space figure between spool cylindricality sheet before the improvement that Figure 1A-the A place is dissectd and valve body;

Fig. 3 is space figure between spool cylindricality sheet after the improvement that Figure 1A-the A place is dissectd and valve body.

Embodiment:

Essential structure of the present utility model as shown in Figure 1, it comprises valve body 1, spool 2, the rotating shaft 3 that links with spool, with the valve body 1 coaxial bearing support that links 5, the bearing unit 6 that rotating shaft 3 and bearing support 5 are linked, outside valve, link and be positioned at inhalation valve 4 on the feeding-passage of valve with valve body 1, described spool is linked to each other with the cylindricality fragment by column body segment and constitutes, column body segment and rotating shaft 3 link, cylindricality fragment and valve body material feeding mouth 7 working surfaces are tangent, referring to Fig. 3, valve body section at spool cylindricality sheet place, its cavity inner wall is cut to connect at a distance of centre distance L by two cylndrical surface and is constituted, during meeting, opens material feeding mouth 7 therein on the cylndrical surface, this cylndrical surface is coaxial with valve core, the axle center of another cylndrical surface is positioned on the elongation line at material feeding mouth center, its radius is equal to or greater than aforementioned cylndrical surface, this example equates for the two cylindrical surface radius, make this section body cavity become eccentric cavity, the value of described centre distance L is 5～8mm.

Claims

1. anti-sticking dry ash metering valve, comprise valve body, spool, rotating shaft, with the coaxial bearing support that links of valve body, the bearing unit that rotating shaft and bearing support are linked, outside valve, link and be positioned at inhalation valve on the feeding-passage of valve with valve body, described spool is linked to each other with the cylindricality fragment by column body segment and constitutes, column body segment and rotating shaft link, cylindricality fragment and valve body material feeding mouth working surface are tangent, it is characterized in that, valve body section at spool cylindricality sheet place, its cavity inner wall is cut to connect at a distance of suitable centre distance by two cylndrical surface and is constituted, during meeting, opens material feeding mouth therein on the cylndrical surface, this cylndrical surface is coaxial with valve core, the axle center of another cylndrical surface is positioned on the elongation line at material feeding mouth center, and its radius is equal to or greater than the radius of aforementioned cylndrical surface.