CN104179985A

CN104179985A - High-pressure large-diameter stop valve with high-in low-out type flow direction

Info

Publication number: CN104179985A
Application number: CN201410351887.9A
Authority: CN
Inventors: 钱玉峰; 胡宝琛; 郝思宏
Original assignee: JIANGSU EVALVE GROUP Co Ltd
Current assignee: JIANGSU EVALVE GROUP Co Ltd
Priority date: 2014-07-22
Filing date: 2014-07-22
Publication date: 2014-12-03

Abstract

The invention discloses a high-pressure large-diameter stop valve with a high-in low-out type flow direction. The stop valve comprises a valve body, a valve rod, a valve seat, a valve clack and the like. The stop valve is characterized in that the valve clack is sleeved with a protective cover, a large round hole and a small round hole are coaxially formed in the protective cover, the inner circle of the large round hole is matched with the outer circle of the valve clack, the inner circle of the small round hole is matched with the outer circle of the valve rod, an adjusting nut is also installed on the valve rod, the outer circle of the valve rod between the adjusting nut and the protective cover is sleeved with a spring, and the height of the valve rod is smaller than the depth of an inner hole of the protective cover. With the adoption of the structure, when the stop valve is opened, the valve clack firstly moves upwards to leave the valve seat under the ascending acting force of the valve rod, the protective cover does not move upwards along with the valve clack under the pressure of a medium and the acting force of the spring, and the protective cover is driven to ascend when the upper end surface of the valve clack is connected and contacted with the inner end surface of the protective cover; when the valve is closed, the protective cover is firstly connected with a plane of the valve seat, and then the valve clack is sealed with the valve seat under the descending acting force of the valve rod. The stop valve is simple in structure, convenient to operate and easy to manufacture, the sealing performance of the high-pressure large-diameter stop valve is greatly improved, and the service life of the high-pressure large-diameter stop valve is greatly prolonged.

Description

One flows to high in and low out type high-pressure heavy caliber stop valve

Technical field

The present invention relates to a kind of valve, particularly relate to one and flow to high in and low out type high-pressure heavy caliber stop valve.

Background technique

Stop valve is a kind of conventional block valve, be mainly used to connect or block the medium in pipeline, stop valve is suitable for pressure, temperature range is very large, but in being generally used for, small-bore pipeline. and MEDIA FLOW is to being low in and high out, the flap of stop valve is to move axially along valve seat center line, for the stop valve of high-pressure large-caliber, pressure is higher, bore more just requires valve rod thicker, the allocating power of Power Drive Unit is larger, so mostly adopt MEDIA FLOW to the structure for high in and low out for the stop valve of high-pressure large-caliber now, although the power of closing has reduced, but strengthen the opening force of valve, fluid washes away also serious all the more to sealing surface of seat, easily cause interior leakage and stop valve was lost efficacy in a short time.

Summary of the invention

The object of the invention is to overcome prior art deficiency, provide one to flow to high in and low out type high-pressure heavy caliber stop valve, it can reduce to open moment and protection sealing surface effectively.

In order to reach upper object, technological scheme of the present invention is such: one flows to high in and low out type high-pressure heavy caliber stop valve, and be the stop valve of high-pressure liquid high in and low out in valve flowing channel, it comprises valve body, valve rod, valve seat, flap etc., it is characterized in that: on flap, cover has a guard shield, in its guard shield coaxial, there is big hole and small sircle hole, the cylindrical of its big hole and flap matches, the cylindrical of its small sircle hole and valve rod matches, on described valve rod, adjusting nut is installed, on the valve rod cylindrical between adjusting nut and guard shield, cover has a spring, on described guard shield, be processed with several little round tube holes, on the cylindrical of described flap, be processed with several flute grooves, the height of its flap is lower than the degree of depth of guard shield big hole, due to said structure, stop valve is in the time opening, flap moves away valve seat on first under the up active force of valve rod, now guard shield moves on not with flap under the pressure of medium and the active force of spring, when connecing while touching, the upper-end surface of flap and the interior edge face of guard shield drive guard shield up in the lump, when valve closing, first guard shield joins with the plane of valve seat, then flap is realized sealing under the descending active force of valve rod and between valve seat.

The invention has the beneficial effects as follows: simple in structure, easily manufacture sealability and the working life of greatly having improved high-pressure heavy caliber stop valve.

Brief description of the drawings

Fig. 1 is closed condition structural representation of the present invention;

Fig. 2 is opening state structural representation of the present invention.

In figure, be labeled as: 1-valve body, 2-flap, 3-valve rod, 4-guard shield, 5-spring, 6-adjusting nut, 7-Cock screw, 8-self-fastening pressure sealing valve unit, 9-flute groove, the little round tube hole of 10-, 11-valve seat.

Embodiment

Below in conjunction with the drawings and specific embodiments, the invention will be further described:

As shown in Figure 1, one flows to high in and low out type high-pressure heavy caliber stop valve, and be the stop valve of high-pressure liquid high in and low out in valve flowing channel, it comprises valve body 1, valve rod 3, flap 2, valve seat 11, it is characterized in that: on flap 2, cover has a guard shield 4, in its guard shield 4 coaxial, there is big hole and small sircle hole, the cylindrical of its big hole and flap 2 matches, the cylindrical of its small sircle hole and valve rod 3 matches, described valve rod 3 is also provided with adjusting nut 6, be enclosed within on valve rod 3 cylindricals being equipped with a spring 5 between adjusting nut 6 and guard shield 4, the size of the flexible energy by rotation adjusting nut 6 adjustable springs 5, in the time that being adjusted to correct position, spring 5 located by Cock screw 7, the effect of spring 5, the first: in the time of valve closing, ensure guard shield 4 first with the plane contact of valve seat 11, it two is: after valve opening, can avoid flap 2, the vibration that guard shield 4 and valve body 1 produce each other under the effect of high-velocity fluid, on described guard shield 4, being processed with the effect that is processed with several flute grooves 9 on the cylindrical of several roundlet through holes 10 and flap 2 is: when valve opening and closing, ensure can supplement in time or drain medium between flap 2 and guard shield 4, valve is in the time closing, the interior hole end surface of the upper-end surface of flap 2 and guard shield 4 has spacing, namely the height of flap 2 is lower than the degree of depth of guard shield 4 big holes, make flap 2 be subject to adequately protecting of guard shield 4, greatly reduce the moment of high-velocity fluid in the time of valve switch washing away flap 2 and valve seat 11 sealing surfaces, seal form between valve rod 3 and valve body 1 adopts pressure self-tightening sealing device 8, can make head in valve realize effective sealing.

As depicted in figs. 1 and 2, one of the present invention flows to high in and low out type high-pressure heavy caliber stop valve and adopts said structure, valve is in the process of opening and closing, its flap 2 and valve seat 11 are all avoided washing away of high-velocity fluid under the protection of guard shield 4, course of action when valve opening is: flap 2 moves away valve seat 11 on first under the up active force of valve rod 3, now guard shield 4 moves on not with flap 2 under the pressure of medium and the active force of spring 5, when connecing, the upper-end surface of flap 2 and the interior edge face of guard shield 4 drive the guard shield 4 up opening process that completes in the lump while touching, operation program when valve closing is: first guard shield 4 makes the plane of guard shield 4 and valve seat 11 join under the descending active force of valve rod 3, then flap 2 is under the descending active force of valve rod 3 and overcome between the resistance of spring 5 and valve seat 11 and fit tightly and realize seal process, and it is higher to present the hydrodynamic pressure that valve passes through, the larger effect of sealing force between its flap 2 and valve seat 11.

Claims

1. one kind flows to high in and low out type high-pressure heavy caliber stop valve, it comprises valve body (1), valve rod (3), flap (2), valve seat (11), it is characterized in that: the outside cover of flap (2) has a guard shield (4), in its guard shield (4) coaxial, there is big hole and small sircle hole, the cylindrical of big hole and flap (2) matches, the cylindrical of small sircle hole and valve rod (3) matches, described valve rod (3) is also provided with nut (6), between nut (6) and guard shield (4) top, be equipped with a spring (5) and be placed on the cylindrical of valve rod (3).

2. one according to claim 1 flows to high in and low out type high-pressure heavy caliber stop valve, it is characterized in that: on described guard shield (4), be processed with several little round tube holes (10).

3. one according to claim 1 flows to high in and low out type high-pressure heavy caliber stop valve, it is characterized in that: on the cylindrical of described flap (2), be processed with several flute grooves (9).

4. one according to claim 1 flows to high in and low out type high-pressure heavy caliber stop valve, it is characterized in that: the height of its flap (2) is lower than the degree of depth of guard shield (4) big hole.