CN202132522U - Hard sealing stop valve - Google Patents

Abstract

The utility model relates to the technical field of pipeline valves, in particular to a hard sealing stop valve, which comprises a hand wheel, a valve cover, a valve body, a valve rod and valve plates. The hand wheel is fixedly connected with a valve rod nut. The upper end of the valve rod is in threaded connection with the valve rod nut. The lower end of the valve rod penetrates through the valve cover to be extended into the valve body and fixedly connected with the valve plates arranged between an inlet and an outlet. The valve plates comprise a primary valve plate and a secondary valve plate fixedly connected with the lower end of the valve rod. The primary valve plate is sleeved on the secondary valve plate which is capable of vertically moving between the primary valve plate and a valve plate cover, and the valve plate cover is fixed at the upper portion of the primary valve plate. A throttle orifice is formed at the lower portion of the primary valve plate. The primary valve plate and the secondary valve plate can move relatively, when the secondary valve plate moves to a certain height, the throttle hole is opened, and a medium in the valve body can flow out through the throttle hole, thereby facilitating adjusting and throttling of the medium and effectively reducing torque generated as the valve plates are opened or closed.

Description

A kind of hard sealed stop valve

Technical field

The utility model relates to the pipeline valve technical field, particularly a kind of hard sealed stop valve.

Background technique

Stop valve is a kind of in many pipeline valves, is mainly used in the pressure fluid stopping of liquid medium in the controlling plumbing fixtures, is widely used.Force fluid stopping sealed type valve because stop valve belongs to,, do not leak with forced seal face so when valve closing, must exert pressure to valve plate.The MEDIA FLOW of existing stop valve gets into valve to the below by valve plate, so the moment of the moment during valve closing when opening is big, so existing stop valve mainly relies on the increasing stem diameter to reach this moment requirement, in order to avoid valve rod bending deflection.In addition, the sealing surface of existing stop valve forms for built-up welding on the plane of valve body or valve plate, and passes through the pressure extruding formation sealing of valve plate and valve body, therefore is not suitable for the medium of being with big, the easy coking of particle, viscosity, otherwise causes sealing surface to damage easily.To existing defective of existing stop valve and deficiency, designing a kind of low cost, the good stop valve of usability is very to be necessary.

The model utility content

The purpose of the utility model is the deficiency to existing technology, provide a kind of simple in structure, fabricating cost is low, the hard sealed stop valve that usability is good.

For realizing above-mentioned purpose, the utility model adopts following technological scheme:

The described a kind of hard sealed stop valve of the utility model, it comprises handwheel, valve gap, valve body, valve rod and valve plate, said valve gap is fixedly connected on the valve body top, and the valve body two ends form import and outlet, and said valve gap internal upper part is provided with Stem Mut; Said handwheel is fixedly connected with Stem Mut; Said valve rod upper end is threaded with Stem Mut, the valve rod lower end pass valve gap stretch into valve body be located at import and export between valve plate be fixedly connected, said valve plate comprises main valve plate and auxiliary valve plate; Said auxiliary valve plate is fixedly connected on the valve rod lower end; Said main valve sleeve-board is located at outside the auxiliary valve plate, and main valve plate top is fixed with the valve plate lid, and said auxiliary valve plate can move up and down between main valve plate and valve plate lid; Said main valve plate bottom forms throttle orifice.

Further, said main valve plate bottom forms sealing inclined-plane one, forms sealing inclined-plane two in the said valve body, and said sealing inclined-plane one is equipped with sealing inclined-plane two; Said sealing inclined-plane one and horizontal plane angle are at the 30-60 degree.

Further, said sealing inclined-plane one and horizontal plane angle are at 45 degree.

Further, the valve rod outer race of bottom is provided with seal arrangement in the said valve gap.

Further, said seal arrangement comprises filler, is located at the sealing seat of filler bottom, is located at the filler gland at filler top, and said filler gland is provided with hold-down grid.

After adopting said structure; The utility model beneficial effect is: the utility model main valve plate and auxiliary valve plate can carry out relative movement; After auxiliary valve plate moved to certain altitude, throttle orifice was opened, and the valve body medium can slowly flow out through the throttle orifice on the main valve plate; Help adjusting or the throttling action of valve body like this, the moment that has been produced when having reduced the valve plate open and close effectively to medium.

Description of drawings

Fig. 1 is the utility model situation cross-sectional view;

Fig. 2 is an A place structure for amplifying schematic representation among Fig. 1.

Among the figure:

1, handwheel; 2, valve gap; 3, valve body; 4, outlet;

5, import; 6, auxiliary valve plate; 7, main valve plate; 8, valve plate lid;

9, sealing seat; 10, filler; 11, filler gland; 12, hold-down grid;

13, valve rod; 14, Stem Mut; 15, throttle orifice; 31, sealing inclined-plane two;

71, sealing inclined-plane one.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Extremely shown in Figure 2 like Fig. 1, the described a kind of hard sealed stop valve of the utility model, it comprises handwheel 1, valve gap 2, valve body 3 valve rod 13 and valve plates, above-mentioned several parts constitute the utility model agent structures.

Said valve gap 2 is fixedly connected on valve body 3 tops, and valve body 3 two ends form import 5 and outlet 4, and said valve gap 2 internal upper parts are provided with Stem Mut 14.Stem Mut 14 is fixedly connected with handwheel 1, and can be with handwheel 1 rotation.

Said valve rod 13 upper ends are threaded with Stem Mut 14, and valve rod 13 lower ends are passed valve gap 2 and stretched into valve body 3 and be fixedly connected with the valve plate of being located at import 5 and export between 4, and this part annexation and existing technology do not have essential difference, no longer are repeated in this description.

Main inventive point as the utility model; Said valve plate comprises main valve plate 7 and auxiliary valve plate 6; Said auxiliary valve plate 6 is fixedly connected on valve rod 13 lower ends; Said main valve plate 7 is sheathed on outside the auxiliary valve plate 6, and main valve plate 7 tops are fixed with valve plate lid 8, and said auxiliary valve plate 6 can move up and down at main valve plate 7 and valve plate lid 8; Said main valve plate 7 bottoms form throttle orifice 15.Through rotation hand wheel 1, valve rod 13 tops are threaded with Stem Mut 14, and valve rod 13 is realized moving up and down; When valve rod 13 moves up; Auxiliary valve plate 6 is with moving on the valve rod 13, and when moving to certain distance, throttle orifice 15 is opened; Valve body 3 medium can slowly flow out through the throttle orifice 15 on the main valve plate 7, help adjusting or the throttling action of valve body to medium like this.

When auxiliary valve plate 6 moved on further with valve rod 13, auxiliary valve plate 6 propped up valve plate lid 8, drove main valve plate 7 and moved on together, and the utility model is opened, medium runner.

For making the utility model realize better sealing effect, said main valve plate 7 bottoms form sealing inclined-plane 1, form sealing inclined-plane 2 31 in the said valve body 3, and said sealing inclined-plane 1 is equipped with sealing inclined-plane 2 31.The sealing surface that the utility model has changed existing stop valve is effectively formed by built-up welding on the plane of valve body or valve plate, by forcing the defective and the deficiency of crush seal.Particularly, said sealing inclined-plane 1 and horizontal plane angle are at the 30-60 degree, and the preferred said sealing of the utility model inclined-plane 1 is spent 45 with horizontal plane angle.

For effectively increasing the sealability of the utility model, valve rod 13 outer race of bottom are provided with seal arrangement in the said valve gap 2.Particularly, said seal arrangement comprises filler 10, is located at the sealing seat 9 of filler 10 bottoms, is located at the filler gland 11 at filler top.For increasing global reliability, said filler gland 11 is provided with hold-down grid 12.

The above only is the preferred embodiments of the utility model, so all equivalences of doing according to the described structure of the utility model patent claim, characteristic and principle change or modify, includes in the utility model patent claim.

Claims (5)

1. hard sealed stop valve, it comprises handwheel (1), valve gap (2); Valve body (3), valve rod (13) and valve plate, said valve gap (2) are fixedly connected on valve body (3) top; Valve body (3) two ends form import (5) and outlet (4), and said valve gap (2) internal upper part is provided with Stem Mut (14); Said handwheel (1) is fixedly connected with Stem Mut (14); Said valve rod (13) upper end is threaded with Stem Mut (14); Valve rod (13) lower end is passed valve gap (2) and is stretched into valve body (3) and be located at import (5) and the valve plate of outlet between (4) is fixedly connected; It is characterized in that: said valve plate comprises main valve plate (7) and auxiliary valve plate (6), and said auxiliary valve plate (6) is fixedly connected on valve rod (13) lower end, and said main valve plate (7) is sheathed on outside the auxiliary valve plate (6); Main valve plate (7) top is fixed with valve plate lid (8), and said auxiliary valve plate (6) can move up and down between main valve plate (7) and valve plate lid (8); Said main valve plate (7) bottom forms throttle orifice (15).

2. hard sealed stop valve according to claim 1; It is characterized in that: said main valve plate (7) bottom forms sealing inclined-plane one (71); Form sealing inclined-plane two (31) in the said valve body (3), said sealing inclined-plane one (71) is equipped with sealing inclined-plane two (31); Said sealing inclined-plane one (71) and horizontal plane angle are at the 30-60 degree.

3. hard sealed stop valve according to claim 2 is characterized in that: said sealing inclined-plane one (71) is spent 45 with horizontal plane angle.

4. according to the arbitrary described hard sealed stop valve of claim 1-3, it is characterized in that: valve rod (13) outer race of the interior bottom of said valve gap (2) is provided with seal arrangement.

5. hard sealed stop valve according to claim 4; It is characterized in that: said seal arrangement comprises filler (10); Be located at the sealing seat (9) of filler (10) bottom, be located at the filler gland (11) at filler top, said filler gland (11) is provided with hold-down grid (12).

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