CN2257341Y

CN2257341Y - High temp. high pressure stop cock

Info

Publication number: CN2257341Y
Application number: CN 95207912
Authority: CN
Inventors: 刘万和
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-12
Filing date: 1995-04-12
Publication date: 1997-07-02
Anticipated expiration: 2005-04-12

Abstract

The utility model discloses a stop valve with high temperature and high pressure, which is a new product of a valve used for controlling the flow and closing of the medium in pipelines. Sealing pairs are composed of conical surfaces of wedge plugs of valve rods and conical surfaces of a valve seat, wherein, the wedge plugs are formed by that two cross-shaped columns are mutually penetrated. The end surfaces of the columns are produced into the conical surfaces to match the valve seat and be used for sealing annular elastic grooves with the same shaft, which are arranged on solid columns and opened with shaft sections and the conical surfaces. The opening and closing of the valves is realized by that hand wheels drive a steel ball (column) mechanism of a cam. When the utility model is opened, the valve rods move downwards, the conical surfaces are disengaged, and the valve rods turn 90 DGE backwards to opening positions. When the utility model is closed, the valve rods turn 90 DGE to closing positions and then move upwards, the conical surfaces are tightly blocked, and the elastic deformation of the wedge plugs is used for sealing. The utility model has the advantages of small size, light weight, easy production, long service life, high temperature and pressure resistance, etc.

Description

The High Temperature High Pressure stopcock

The High Temperature High Pressure stopcock is a kind of valve product, is used for the circulation of controlling plumbing fixtures medium and closes.

Stopcock is one of valve the earliest, and it has advantages such as easy to manufacture, easy and simple to handle.Stopcock has two kinds of hard sealing and soft seals, seals stopcock firmly because of taper fit exists foozle, the soft seal stopcock under high pressure easily lost efficacy because of sealing material, all can not be high pressure resistant.High-temperature high pressure valve commonly used is a gate valve, but the gate valve opening and closing time is long, and medium easily produces the vibration of eddy current and valve in valve pocket, and crushing is bigger, and makes relatively difficulty.

The purpose of this utility model just provides a kind of valve, and it has the advantage of above two kinds of valves concurrently, has solved the problem of they existence again.

The purpose of this utility model is achieved in that forming sealing by the conical surface of valve rod tapered plug and the valve seat conical surface pays.Tapered plug is passed through mutually by two cylinders of " ten " font and is formed, and is used for having elastic groove on the solid cylinder of throttle down, is used to open on the cylinder of valve have the runner hole.During valve opening and closing, valve rod goes to corresponding position, and tapered plug is unclamped or wedging.The manipulation of valve partly is a cam---steel ball (post) mechanism, cam divides cam ring and external cam, steel ball (post) is housed: during Open valve in the steel ball hole of cam, handwheel drives cam ring and rotates, locking ball (post) is pressed into valve rod groove, rotation steel ball (post) is thrown off valve rod groove, and valve rod moves down, and unclamps tapered plug.Be rotated further handwheel, rotation steel ball (post) is pressed into valve rod groove, and locking ball (post) is thrown off, and drives valve rod and turns over 90 ° to the enable possition, and at this moment, valve flowing channel hole and tapered plug runner hole form straight-through, can avoid producing eddy current, crushing and valve vibration.During throttle down, handwheel drives cam ring and rotation steel ball (post) and valve rod and turns over 90 ° to closed position, and at this moment locking ball (post) is pressed into valve rod groove, rotation steel ball (post) is thrown off, and is rotated further handwheel, and valve rod moves up, conical surface wedging, closely sturdy because of resiliently deformable, realize sealing.Because of adopting hard sealing, if select suitable material for use, but high temperature high voltage resistant.

Compare with traditional stopcock,, and have elastic groove on the tapered plug because of this valve adopts hard sealing, thus good seal performance, but high temperature high voltage resistant.The conical surface is thrown off during valve opening and closing, and working life is longer.Compare with gate valve, its compact structure, volume is little, and is in light weight, and cost is low.The major part technology capability is also better; Elastic groove can be at when casting straight forming; Cam profile can be milled into type or the like.This valve has advantages such as easy to operate, that crushing is little simultaneously.

Figure of description is one of the present utility model and implements illustration.Fig. 1 is the whole figure of the width of cloth, and Fig. 2, Fig. 3, Fig. 4, Fig. 5 are respectively A-A, B-B, C-C, the D-D view that has amplified.Below in conjunction with accompanying drawing structure of the present utility model and principle are described.

Valve seat position 2 of each welding-on on the turnover runner mouth of valve body 13, the valve seat dimpling goes out valve body.The tapered plug of valve rod 14 bottoms is passed through mutually by two cylinders of " ten " font and is formed, and the cylinder end face is processed to the conical surface and valve seat matches.Two cylinder one are solid cylinder, on have elastic groove, the shaft section of elastic groove is a circular arc, and this circular arc and the tapered plug conical surface are coaxial.Have the runner hole in another cylinder, when valve was in opening state, it and valve flowing channel hole led directly to.Handwheel 19, is packed in the screw hole of steel ball by screw 2 on valve body by steel ball 1 axially locating, and handwheel can rotate relative to valve body.Handwheel rotates in external cam 17 in conjunction with driving cam ring 3 synchronously by the tooth embedding, and external cam is fixed on the valve body with screw 5.Interior external cam all is drilled with steel ball hole, rotation steel ball (post) 4 and locking ball (post) 18 are installed respectively, inside and outside cam profile is all the circular arc of the coaxial different-diameter of two sections and location cylindrical, cam curve and steel ball hole have strict position relation: during Open valve, rotation steel ball (post) is pressed into valve rod groove, and locking ball (post) begins to withdraw from valve rod groove; During throttle down, locking ball (post) is pressed into valve rod groove, and rotation steel ball (post) begins to withdraw from valve rod groove.Between two sections circular arcs, an end circular arc connects, and adds to form naturally man-hour, and the other end connects by certain angle straight line.The valve rod shank has triangle (or trapezoidal) straight trough with the cam respective angles, and angle is between 30 °-120 °.Interior external cam is respectively applied for to control locking ball (post) and rotate steel ball (post) and is pressed into or withdraws from valve rod groove, realizes the circumferentially fixing and disengagement of valve rod and handwheel, valve rod and valve body.

Accompanying drawing is the closed position of valve.Rotate counterclockwise handwheel, rotation steel ball (post) rotates with handwheel, at this moment locking ball (post) is pressed in the valve rod groove by cam ring, valve rod circumferentially is fixed on the valve body, so valve rod is descending, the conical surface is thrown off, when rotating steel ball (post) when going to right horizontal position, external cam will be rotated steel ball (post) and be compressed into valve rod groove, and the cam ring inner groovy also goes to right horizontal position simultaneously, locking ball (post) begins to skid off from valve rod groove, valve rod and valve body are circumferentially thrown off, be rotated further handwheel, valve rod turns over 90 ° synchronously, because of locking ball (post) effect handwheel stops operating, valve is in opening state.Desire throttle down and then clockwise rotate 90 ° on handwheel, rotation steel ball (post) and valve rod go to right horizontal position, and locking ball (post) enters valve rod groove, and rotation steel ball (post) begins to throw off from valve rod groove, valve is in the closed position, be rotated further handwheel, valve rod is up, the tapered plug conical surface and the wedging of the valve seat conical surface, handwheel stops operating, because of existing wedging stress between the tapered plug conical surface and the valve seat surface, tapered plug generation resiliently deformable and fitting tightly, valve is closed fully.

The shank of valve rod is by Gland 8, bolt 7, nut 6 and sell 9 and compress filler 16, and pad 15 seals, the bottom of valve body by spiral shell emit 11 and the self-seal device formed of seal ring 10 shut.The upper end of valve rod has straight trough, and the runner hole direction of direction and tapered plug is consistent, as the sign of valve opening and closing state.

Claims

1, the High Temperature High Pressure stopcock that is used for the circulation of controlling plumbing fixtures medium and closes, forming sealing by the conical surface of valve seat conical surface and valve rod tapered plug pays, it is characterized in that the valve rod tapered plug is passed through mutually by two cylinders of " ten " font forms, be used for having elastic groove on the cylinder of throttle down, be used for having the runner hole on the cylinder of Open valve, during valve opening and closing, valve rod goes to corresponding position, and tapered plug is unclamped or wedging.

2, according to the described stopcock of claim 1, the actuating element that it is characterized in that valve is a cam one steel ball or steel column mechanism, cam divides cam ring and external cam, steel ball or steel column are housed in the steel ball hole of cam, cam profile is and locatees two sections circular arcs of the coaxial different-diameter of cylindrical and forms, one end adds and connects naturally man-hour, the other end straight line connects, straight line angle and valve rod groove angle adapt, strict position relation is arranged: during Open valve between cam curve and the steel ball hole, rotation steel ball or steel column are pressed into valve rod groove, and locking ball or steel column begin to withdraw from valve rod groove; During throttle down, locking ball or steel column are pressed into valve rod groove, and rotation steel ball or steel column begin to withdraw from valve rod groove.

3, stopcock according to claim 1, the shaft section that it is characterized in that elastic groove is a circular arc, and this circular arc and the tapered plug conical surface are coaxial.

4, stopcock according to claim 2 is characterized in that the valve rod shank has triangle straight trough or trapezoidal straight trough, and angular dimension is between 30 °-120 °.