CN102322533A

CN102322533A - Stop valve

Info

Publication number: CN102322533A
Application number: CN201110270431A
Authority: CN
Inventors: 刘工勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-14
Filing date: 2011-09-14
Publication date: 2012-01-18

Abstract

The invention relates to a valve, in particular to a stop valve. The invention solves the problem of short service life caused by irrational structure of the traditional stop valve. The stop valve comprises a valve body, a valve rod and a valve cover, wherein the center of the valve cover is provided with an upwards-extending central sleeve; a hand wheel is fixed on the top of the valve rod; a nut tube is arranged in the central sleeve of the valve cover, and a central hole is arranged on the nut tube; the lower part of the valve rod is threaded with the central hole of the nut tube; a support ring movably matched with the valve rod is fixed on the top of the central sleeve of the valve cover; a ring-shaped groove is arranged on the upper part of the valve rod, and a ring-shaped boss matched with the ring-shaped groove is arranged on the support ring; a transverse H-shaped piston is fixed on the bottom of the nut tube; and the top of the transverse H-shaped piston is movably and hermetically matched with the inner wall of the valve body while the bottom of the transverse H-shaped piston is matched with a valve port. The stop valve has the advantages of simple structure, clever design and greatly prolonged service life and can be widely applied to gas and liquid transportation pipes.

Description

A kind of stop valve

Technical field

The present invention relates to valve, be specially a kind of stop valve.

Background technique

Existing stop valve comprises the valve body that has liquid inlet and outlet, the valve rod that is installed on the valve gap on the valve body and passes valve gap; Be provided with in the valve body body cavity is divided into influent stream chamber and the valve port that effluents chamber two-part and cooperatively interact with the flap of valve rod end, the liquid entering hole of valve body communicates with the influent stream chamber and liquid outlet communicates with the chamber of effluenting; For being threaded, the roof anchorage of valve rod has handwheel between the center hole at valve rod and valve gap top.During work, rotate handwheel, the relative valve gap of valve rod is done up or down and is moved, thereby makes the flap of stem bottom open and closed valve port, gets final product the influent stream chamber in conducting and the valve body and the chamber of effluenting.Cause valve rod at bubbly water for a long time like this, get rusty easily and scaling, the time is caused defective valve once long dead, the stubborn motionless phenomenon of rust that occurs, and the life-span is shorter; The sealing means frictional force of existing valve rod is big simultaneously, switch moment is big; Handwheel rotates hard, can damage valve rod gradually after long-time the use, has greatly reduced working life; And, valve rod can't monitor in real time when rotating its height, the working life that also can reduce valve rod.

Summary of the invention

The present invention provides a kind of stop valve in order to solve existing stop valve because of unreasonable structure causes short problem in working life.

The present invention adopts following technological scheme to realize: a kind of stop valve comprises the valve body that has liquid inlet and outlet, the valve gap that there is upwardly extending center sleeve at the center and the valve rod that passes valve gap; The roof anchorage of valve rod has handwheel; Be provided with in the valve body body cavity is divided into the influent stream chamber and the two-part valve port in chamber that effluents, the liquid entering hole of valve body communicates with the influent stream chamber and liquid outlet communicates with the chamber of effluenting; Be provided with the nut pipe in the center sleeve of valve gap, have center hole on the nut pipe; The bottom of valve rod is threaded with the center hole of nut pipe; The center sleeve roof anchorage of valve gap has the support ring that cooperates with valve handle activity; The top of valve rod is provided with annular groove, and support ring is provided with the annular boss that cooperatively interacts with annular groove; The bottom of nut pipe is fixed with the I-shaped piston, and the top of I-shaped piston cooperates with the valve interior wall movable sealing, and the bottom and the valve port of I-shaped piston cooperatively interact; I-shaped piston top forms the piston cavity between piston tube and valve body.During use; Rotational fixation is in the handwheel at valve rod top; Make with stem lower portion to move up and down with respect to valve gap through the nut pipe that is threaded, cooperatively interacting of annular groove can prevent that valve rod from moving up and down with respect to valve gap on the annular boss and valve rod and be fixed on the support ring at valve gap top; The I-shaped piston that is fixed in nut pipe bottom also moves up and down with respect to valve body with the nut pipe, so just makes the bottom of I-shaped piston open and closed valve port, thus the influent stream chamber in conducting and the valve body and the chamber of effluenting.The I-shaped piston is isolated liquid in the valve body and piston cavity, thereby prevents that liquid from get rusty valve rod or nut pipe etc., the dead or stubborn motionless phenomenon of screw thread rust between stem lower portion and the nut pipe so just can not occur, has prolonged working life.

Further, center sleeve one side of said valve gap has vertical chute, and the roof anchorage of said valve rod has the lateral pin that in vertical chute, is free to slide; Can monitor the rotation height of nut pipe like this through the position of lateral pin in the vertical chute of valve gap one side in real time, the working life of greatly having improved valve rod.

The present invention is simple in structure, design is ingenious; Valve rod does not contact with liquid has avoided the dead or stubborn motionless phenomenon of rust, and switch is flexible, has greatly improved working life; Solved existing stop valve and caused short problem in working life because of unreasonable structure, can be in gas-liquid pipeline.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Among the figure: the 1-valve body; The 2-valve gap; 3-nut pipe; 4-I-shaped piston; The 5-lateral pin; The 6-piston cavity; The 7-valve rod; The 8-handwheel; The 9-support ring; The vertical chute of 10-.

Embodiment

A kind of stop valve comprises the valve body 1 that has liquid inlet and outlet, the valve gap 2 that there is upwardly extending center sleeve at the center and the valve rod 7 that passes valve gap 2; The roof anchorage of valve rod 7 has handwheel 8; Be provided with in the valve body 1 body cavity is divided into the influent stream chamber and the two-part valve port in chamber that effluents, the liquid entering hole of valve body 1 communicates with the influent stream chamber and liquid outlet communicates with the chamber of effluenting; Be provided with nut pipe 3 in the center sleeve of valve gap 2, have center hole on the nut pipe 3; The bottom of valve rod 7 is threaded with the center hole of nut pipe 3; The center sleeve roof anchorage of valve gap 2 has and the valve rod 7 movable support rings 9 that cooperate; The top of valve rod 7 is provided with annular groove, and support ring 9 is provided with the annular boss that cooperatively interacts with annular groove; The bottom of nut pipe 3 is fixed with I-shaped piston 4, and the top of I-shaped piston 4 cooperates with valve body 1 inwall movable sealing, and the bottom and the valve port of I-shaped piston 4 cooperatively interact; I-shaped piston 4 tops form the piston cavity 6 between piston tube 3 and valve body 1.Center sleeve one side of said valve gap 2 has vertical chute 10; The roof anchorage of said nut pipe 3 has the lateral pin 5 that in vertical chute 10, is free to slide.

Claims

1. a stop valve comprises the valve body (1) that has liquid inlet and outlet, the valve gap (2) that there is upwardly extending center sleeve at the center and the valve rod (7) that passes valve gap (2); The roof anchorage of valve rod (7) has handwheel (8); Be provided with in the valve body (1) body cavity is divided into the influent stream chamber and the two-part valve port in chamber that effluents, the liquid entering hole of valve body (1) communicates with the influent stream chamber and liquid outlet communicates with the chamber of effluenting; It is characterized in that: be provided with nut pipe (3) in the center sleeve of valve gap (2), the nut pipe has center hole on (3); The bottom of valve rod (7) is threaded with the center hole of nut pipe (3); The center sleeve roof anchorage of valve gap (2) has and the movable support ring (9) that cooperates of valve rod (7); The top of valve rod (7) is provided with annular groove, and support ring (9) is provided with the annular boss that cooperatively interacts with annular groove; The bottom of nut pipe (3) is fixed with I-shaped piston (4), and the top of I-shaped piston (4) cooperates with valve body (1) inwall movable sealing, and the bottom and the valve port of I-shaped piston (4) cooperatively interact; I-shaped piston (4) top forms and is positioned at the piston cavity (6) between piston tube (3) and the valve body (1).

2. a kind of stop valve according to claim 1 is characterized in that: center sleeve one side of said valve gap (2) has vertical chute (10); The roof anchorage of said nut pipe (3) has the lateral pin (5) that in vertical chute (10), is free to slide.