CN101012898A

CN101012898A - Movable combination valve

Info

Publication number: CN101012898A
Application number: CN 200710034395
Authority: CN
Inventors: 孔华山; 张湘泉; 袁军
Original assignee: ZHUZHOU HONGYUAN HIGH-PRESSURE VALVE Co Ltd
Current assignee: ZHUZHOU HONGYUAN HIGH-PRESSURE VALVE Co Ltd
Priority date: 2007-02-07
Filing date: 2007-02-07
Publication date: 2007-08-08

Abstract

The invention relates to a movable composite valve formed by a stop valve and a ball valve, wherein, the cage sheath of stop valve is movably connected to the valve base; the valve base is movably connected with the valve body; the cage sheath has stuff holes; the valve element is movable; the valve rod is formed by lower stop valve rod and upper stop valve rod connected with spline; the upper stop valve rod is fixed with an active gear and an active cam while the active cam is above the active gear; the lower ball valve rod and upper ball valve rod of ball valve are connected via the connecting sheath; the upper valve rod is fixed with an inactive cam above the inactive gear; the inactive cam and the inactive gear are arranged with a clutch; the inactive gear is connected with the screw of upper ball valve rod; the active gear of stop valve is meshed with the inactive gear of ball valve; the active cam of stop valve is meshed with the inactive cam of ball valve. The cage sheath and the valve base are separated, with controlled quality and repaired property on site. And the invention uses cam device to improve the accuracy of seal position of ball.

Description

Movable combination valve

Technical field

The present invention relates to a kind of combination valve, particularly a kind of movable combination valve.

Background technique

In the High Temperature High Pressure system of industries such as electric power, oil, chemical industry, usually a large amount of high-temperature high pressure valves that use, because its system condition is abominable, often cause valve to leak at short notice or under few operational circumstances of operation, producing, valve is in case interior the leakage, because souring, the very fast inefficacy of valve brings huge energy waste and economic loss to the user.As everyone knows, isolating valve mainly is to lean on the sealing of spool and valve seat to cut off, Yi Bian in the combination valve isolating valve, Yi Bian be ball valve.

The sealing of isolating valve is mainly by the structures shape of valve seat.From the home and abroad valve mechanism, most valve seats all adopt special material to be welded on the valve body and reprocess.Some well-known manufacturers of the U.S., valve seat also is welded on the valve body and processes, as VTI, fertile gram etc., domestic Harbin Boiler Plant, Dongfang Boiler Factory, Kaifeng High Pressure Valve Factory, their valve seat mostly is welded on the valve body and shapes.Welding seat has following deficiency: 1, because stuffing hole is darker, machining is difficulty relatively, and particularly small-bore DN10, clear valve diameters such as DN15, DN20 are little, and difficulty of processing is bigger; 2, the difficult control of welding quality is particularly pressed from both sides quarrel, pore, crackle and is difficult for finding that in time cause anti-worker, product percent of pass is low when welding; 3, owing to the welding stress effect, just tempering in time also cannot say for sure to demonstrate,prove 100% not crackle at last, the welding quality of the very difficult control of the STL alloy material that generally adopts both at home and abroad; 4, because valve body is irregular, distortion can not guarantee the design circularity and the ovality of valve seat greatly under high temperature condition, causes the valve blow-by; 5, the welding seat of Shi Yonging is not washed away in system, and particularly traditional single valve bar, the valve of valve seat wash away more serious, if wash away slightly, the scene utilizes equipment to repair, if wash away serious, must cut down welding again to valve, the scene can not be changed.

The combination valve that uses normally utilizes two pairs of gears to realize two actions at present, and during owing to the ball hermetically closing, tooth sector can not be thrown off fully, cause ball sealing location inaccurate, the dead man positioning error is also big, and is very easily stuck, pull out motionless, so, do not realize action at all.

Summary of the invention

Purpose of the present invention just provides a kind of movable combination valve that overcomes defective in the above-mentioned prior art.

Technological scheme of the present invention realizes that by following approach it is made up of stop valve and ball valve, and stop valve contains valve body, valve seat, valve rod, cage cover, spool, wherein the cage cover is flexible connection with valve seat, also for flexibly connecting, cage puts and is provided with stuffing hole for valve seat and valve body, and spool is movable spool; Valve rod by down by valve rod with upward forms by valve rod, and down by valve rod with go up by between the valve rod being the spline connection; Go up on valve rod and be fixed with driving gear and actuating cam, actuating cam is positioned at the top of driving gear; Ball valve contains spheroid, following ball valve bar and upper ball valve bar, wherein descend between ball valve bar and the upper ball valve bar and connect by reducing sleeve, be fixed with by moving cam on the upper ball valve bar, be positioned at the top of driven gear by moving cam, and be respectively equipped with clutch on moving cam and the driven gear, driven gear and upper ball valve bar are scyewed joint, and move up and down with the driving gear rotation; The driving gear of stop valve and the engagement of the driven gear of ball valve, the passive cam-engaged of the actuating cam of stop valve and ball valve.

The present invention has the following advantages: 1, because the cage cover, valve seat is unit independently, and it is kept apart the cage cover with valve body, and stuffing hole offers convenience to machining in the cage cover.2, because valve seat is a part independently, and machining is simple, welding STL alloy can guarantee that from technology, all control easily qualitatively up-to-standard rate is more than 98%; 3, since the present invention be a separate component, though be subjected to the influence of system temperature, it is then unconventional, the transformation rule of itself is contained in the valve body, with valve body be gapped, can not be out of shape because of the distortion of valve body; 4, because it is a separate component, even in system, washed away badly, can repair timely at the scene, spool, valve seat can completely be changed, and can not influence manufacturer production.5, owing to adopt cam mechanism, make the ball sealing station more accurately, reliably.

Description of drawings

Accompanying drawing is a structural representation of the present invention.

Wherein: 1,5-elevated-temperature seal pad, 2-valve seat, 6-end valve rod, last valve rod, 3-cage cover, 4-spool, 8-driving gear, 9-actuating cam, 10-handwheel, the 11-of ending of 7-down by ball valve bar, 17-spheroid, 18-valve body under moving cam, 12-upper ball valve bar, 13-clutch, 14-driven gear, 15-reducing sleeve, the 16-.

Embodiment

Describe the specific embodiment of the invention in detail below in conjunction with accompanying drawing.

Technological scheme of the present invention realizes by following approach, it is made up of stop valve and ball valve, stop valve contains valve body 18, valve seat 2, valve rod, cage cover 3, spool 4, wherein cage cover 3 is flexible connection with valve seat 2, valve seat 2 also is flexible connection with valve body 18, cage cover 3 is provided with stuffing hole, and spool 4 is movable spool; Valve rod by down by valve rod 6 with upward forms by valve rod 7, and down by valve rod 6 with go up by between the valve rod 7 being the spline connection; Go up on valve rod 7 and be fixed with driving gear 8 and actuating cam 9, actuating cam 9 is positioned at the top of driving gear 8;

Ball valve contains spheroid 17, following ball valve bar 16 and upper ball valve bar 12, wherein descend between ball valve bar 16 and the upper ball valve bar 12 and connect by reducing sleeve 15, be fixed with on the upper ball valve bar 12 by moving cam 11 and driven gear 14, be positioned at the top of driven gear 14 by moving cam 11, and be respectively equipped with clutch 13 on moving cam 11, the driven gear 14, driven gear 14 is scyewed joint with upper ball valve bar 12, and moves up and down with the driving gear rotation.

The driving gear 8 of stop valve and 14 engagements of the driven gear of ball valve, the actuating cam 9 of stop valve and being meshed of ball valve by moving cam 11.

(accompanying drawing is a fully open position of the present invention) as shown in drawings, when wanting throttle down, the handwheel 10 that turns clockwise upward rotates by valve rod 7, actuating cam 9, driving gear 8 thereupon, spline housing does not rotate and moves, end valve rod 6 down under the effect of anti-rotation card, can only move down, continue rotation hand wheel 180 degree, being revolved by moving cam 11 of being engaged with turn 90 degrees, simultaneously, following ball valve bar 16 makes spheroid 17 also rotate 90 degree, thereby closes the ball sealing.Continue rotation hand wheel again, move down in the engagement of valve seat 2 conical surfaces by valve rod 6 down, realize that combination valve cuts out fully like this by sealing.

Be rotated counterclockwise handwheel 10, open earlier by sealing, throw off owing to the actuating cam 9 of this moment with by moving cam 11, so the ball sealing is not moving, when the spool 4 of stop valve will put in place, clutch 13 on the driven gear 14 with by 13 engagements of the clutch on the moving cam 11, continue rotation hand wheel, this moment by moving cam 11, driven gear 14, upper ball valve bar 12, ball valve bar 16 and spheroid 17 are one down, as long as driving gear turn 90 degrees, ball sealing just turn 90 degrees, and so just realizes that two seals opens fully.

Two seals of the present invention was both relatively independent, connected each other again, and protection mutually just because this mutual effect has greatly improved the leakproofness that valve turn-offs, has also greatly prolonged the working life of valve simultaneously.

Claims

1, a kind of combination valve by forming by sealing and ball sealing, is characterized in that:

A, stop valve contain valve body (18), valve seat (2), valve rod, cage cover (3), spool (4), wherein cage cover (3) is flexible connection with valve seat (2), valve seat (2) also is flexible connection with valve body (18), and cage cover (3) is provided with stuffing hole, and spool (4) is movable spool; Valve rod by valve rod (6) with upward forms by valve rod (7), and is the spline connection by valve rod (6) and last ending between the valve rod (7) down by down; Go up on valve rod (7) and be fixed with driving gear (8) and actuating cam (9), actuating cam (9) is positioned at the top of driving gear (8);

B, ball valve contain spheroid (17), following ball valve bar (16) and upper ball valve bar (12), wherein descend between ball valve bar (16) and the upper ball valve bar (12) and connect by reducing sleeve (15), be fixed with on the upper ball valve bar (12) by moving cam (11), be positioned at the top of driven gear (14) by moving cam (11), and be respectively equipped with clutch (13) on moving cam (11) and the driven gear (14), driven gear (14) is a scyewed joint with upper ball valve bar (12), and moves up and down with driving gear (8) rotation;

Driven gear (14) engagement of driving gear of C, stop valve (8) and ball valve, the actuating cam of stop valve (9) is meshed by moving cam (11) with ball valve.