CN203115113U

CN203115113U - Novel sealing stop valve

Info

Publication number: CN203115113U
Application number: CN 201220713417
Authority: CN
Inventors: 尹波
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-21
Filing date: 2012-12-21
Publication date: 2013-08-07
Anticipated expiration: 2022-12-21

Abstract

The utility model particularly relates to a novel sealing stop valve, which comprises a valve body, a valve core and a valve seat, wherein the valve core and the valve seat are sheathed in the valve body; the outer side surface of the valve seat and the inner side surface of the valve body are fixedly connected by threads; the upper end surface of the valve seat is provided with an annular slot; and the valve seat is clamped with the valve core by an annular boss arranged on the lower end surface of the valve core. According to the novel sealing stop valve disclosed by the utility model, the inner leakage problem of the valve due to washing, insufficient closing force and uneven thermal expansion of the stop valve can be solved, the service cycle of the stop valve is increased, the inner leakage problem of a stop valve medium is avoided, and the novel sealing stop valve has the advantages of energy saving and consumption reduction.

Description

A kind of novel seal stop valve

Technical field

The utility model relates to the stop valve technical field, particularly a kind of novel seal stop valve that is applicable in the steam turbine steam drain water piping.

Background technique

At present, using the sealing surface at the conventional stop valve of steam medium is single sealing surface because its sealing surface shape very easily produces the dielectric leakage defective, as close when valve be spool with valve seat contact anterior diastema than hour, easily produce cavitation and wash away phenomenon; As close power moment hour, can cause in the medium and leak; When being applied to the high pressure steam medium, even as the valve body non-homogeneous expansion, be prone to the interior leakage that the power deficiency of closing causes.

The model utility content

The utility model is in order to remedy the deficiency of existing design, the utility model provides a kind of novel seal stop valve, this valve has solved stop valve because washing away, close leakage problem in power deficiency, the inhomogeneous valve that causes of thermal expansion, not only increase the life cycle of stop valve, but also stopped leakage problem in the stop valve medium, have energy-saving and cost-reducing advantage.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of novel choke device, comprise valve body, spool, valve seat, be arranged with spool and valve seat in the valve body, the outer side surface of valve seat is fixedlyed connected by screw thread with the inner side surface of valve body, upper-end surface at valve seat is provided with circular groove, annular boss and the spool clamping of valve seat by being located at the spool lower end surface.

The vertical cross-section of described circular groove is trapezium structure, and the interior inclined-plane of circular groove both sides is set to inner seal face, outside sealing surface respectively, and two sealing surfaces are one " β " angle, and " β " is 0 °～90 °.

The vertical cross-section of described annular boss is square convex shoulder structure.

Two turnings of the convex shoulder of described spool lower end surface are circular-arc.

Described valve seat is detachable.

Beneficial effect: one, the vertical cross-section of the circular groove of valve seat is trapezium structure, and the inner seal face of spool, outside sealing surface increase the power of closing with the inner seal face of the circular groove of valve seat, when outside sealing surface contacts respectively when valve closing; Two, MEDIA FLOW makes spool except the power of being closed to being set to go out under enterprising, has also increased the downward pressure of medium; Three, the inner seal face of valve seat, outside sealing surface are arranged in the circular groove, have avoided spool washed away by medium when opening state; Four, valve seat, is changed in valve body easily by screw threads for fastening.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the utility model valve wide open status architecture schematic representation;

Fig. 3 is the utility model valve half-open position partial structurtes schematic representation;

Fig. 4 is the utility model valve closing state partial structurtes schematic representation;

Number in the figure: 1, valve body, 2, spool, 2.1, annular boss, 3, valve seat, 3.1, circular groove, 4, screw thread.

Embodiment

With reference to Figure of description the utility model is done following detailed description the in detail:

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, this novel seal stop valve, comprise valve body 1, spool 2, valve seat 3, be arranged with spool 2 and valve seat 3 in the valve body 1, the outer side surface of valve seat 3 is fixedlyed connected by screw thread 4 with the inner side surface of valve body 1, be provided with circular groove 3.1 in the upper-end surface of valve seat 3, the annular boss 2.1 and spool 2 clampings of valve seat 3 by being located at spool 2 lower end surfaces; The vertical cross-section of described circular groove 3.1 is trapezium structure, and the interior inclined-plane of circular groove both sides is set to inner seal face 3.2 respectively, sealing surface 3.3, two sealing surfaces in the outside are one " β " angle, and " β " is 0 °～90 °.The vertical cross-section of described annular boss 2.1 is square convex shoulder structure.Two turnings of the convex shoulder of described spool 2 lower end surfaces are circular-arc.Described valve seat 3 is detachable.

Embodiment 1:

As shown in Figure 2: when valve wide open is spool 2 when being in internal upper part position, valve body 1 chamber, medium enters from valve body 1 left side in the direction of arrows, and flow out on the right side.In the media flow process, the inner seal face 2.2 of spool 2 can not be subjected to washing away of medium, and outside sealing surface 2.3 can be subjected to less medium and wash away; The inner seal face 3.2 of valve seat 3, outside sealing surface 3.3 can not be subjected to washing away of medium owing to be arranged in the circular groove 3.1 of valve seat 3.

Embodiment 2:

As shown in Figure 3: not closing as yet at valve is inner seal face 2.2, the outside sealing surface 2.3 of spool 2, with the inner seal face 3.2 of valve seat 3, when outside sealing surface 3.3 has micro-gap respectively, medium enters in the circular groove 3.1 of valve seat 3 from gap between the outside sealing surface 3.3 of the outside sealing surface 2.3 of spool 2 and valve seat 3, velocity of medium reduces, volume increases, pressure also decreases, then, the intermediate cavity 1.1 that the gap enters valve body 1 between the inner seal face 3.2 of the inner seal face 2.2 by spool 2 and valve seat 3 again.

Embodiment 3:

As shown in Figure 4: the inner seal face 2.2 of spool 2, outside sealing surface 2.3 when the valve closing state contact respectively with inner seal face 3.2, the outside sealing surface 3.3 of the circular groove 3.1 of valve seat 3.In actual motion, when spool 2, when valve seat 3 is subjected to the medium heat non-homogeneous expansion, when making the sealing force minimizing of some sealing surfaces, then the sealing force of another sealing surface also increases.

Claims

1. novel seal stop valve, comprise valve body (1), spool (2), valve seat (3), it is characterized in that: be arranged with spool (2) and valve seat (3) in the valve body (1), the outer side surface of valve seat (3) is fixedlyed connected by screw thread (4) with the inner side surface of valve body (1), be provided with circular groove (3.1) in the upper-end surface of valve seat (3), the annular boss (2.1) and spool (2) clamping of valve seat (3) by being located at spool (2) lower end surface.

2. a kind of novel seal stop valve according to claim 1, it is characterized in that: the vertical cross-section of described circular groove (3.1) is trapezium structure, the interior inclined-plane of circular groove both sides is set to inner seal face (3.2), outside sealing surface (3.3) respectively, two sealing surfaces are one " β " angle, and " β " is 0 °～90 °.

3. a kind of novel seal stop valve according to claim 1, it is characterized in that: the vertical cross-section of described annular boss (2.1) is square convex shoulder structure.

4. a kind of novel seal stop valve according to claim 1, it is characterized in that: two turnings of the convex shoulder of described spool (2) lower end surface are circular-arc.

5. a kind of novel seal stop valve according to claim 1 is characterized in that: described valve seat (3) is detachable.