CN2369047Y - Valve - Google Patents

Abstract

The utility model discloses a valve, which is composed of a valve body, an outer sleeve fixedly connected with the valve body, a nut arranged at the upper part of the outer sleeve, a self-sealing piston in the outer sleeve, a screw rotationally connected with the piston, a straight rod fixedly connected with the piston and a sealing valve plate connected with the lower end of the straight rod. The utility model has the advantage of good sealing effects, and puts an end to the leakage phenomenon of an ordinary valve due to the fact that the sealing of a thread hole at the middle part of the nut is poor.

Description

Valve

The utility model relates to a kind of valve.

Existing widely used valve, the sealing leakage proof at its valve rod place adopt stuffing box packing and clamping nut sealing usually, and after use a period of time, filler is worn, and seepage promptly takes place at the sealing place, causes the seepage of valve.

The purpose of this utility model is: a kind of valve that prevents clamping nut middle part tapped hole seepage is provided.

The purpose of this utility model realizes by following scheme:

Valve of the present utility model, comprise valve body, the overcoat of fixedlying connected with valve body, at the fixedly connected nut in the upper end of overcoat, there is tapped hole at middle part at nut, the tapped hole at screw rod and nut middle part is supporting, at the fixedly connected handle in the upper end of screw rod, the bottom of screw rod and upper connector composition are rotationally connected, piston can move in the overcoat endoporus, and the downside of piston has protruding annulus along its cylindrical, and piston is fixedlyed connected with following link with upper connector, fixedly connected with following link in the upper end of straight-bar, the lower end of straight-bar is connected with seal arrangement.One circular groove is arranged at the bottom of screw rod, and there is the hole that matches with the screw rod lower end upper connector upper end, at this place, hole one and above pin-and-hole is arranged, and pin is installed in this pin-and-hole and snaps in the circular groove of screw rod bottom.

Above-mentioned the utility model valve, overcoat is fixedlyed connected with valve body by internal-jointed.

Above-mentioned the utility model valve, in the endoporus of overcoat fixedly connected in the cover, piston matches with interior cover, and can move therein.

Above-mentioned the utility model valve, the seal arrangement that its straight-bar lower end connects is a valve block.

Because the utility model adopts the rubber piston sealing, when Open valve, under the effect of fluid pressure, the annulus of rubber piston downside projection is close to interior cover, make the liquid can't be by the surface of contact seepage of piston and interior cover, strengthen sealing effect, thereby stopped the seepage that common valve causes because of clamping nut middle part tapped hole part sealing effect difference.Because of the inwall at overcoat is equipped with interior cover, overcoat can be selected cheap material for use again, and interior cover is selected steel or plastic material for use, has so not only guaranteed the seal request of piston, and can reduce production costs.

Below in conjunction with accompanying drawing in detail embodiment of the present utility model is described in detail.

Be illustrated in figure 1 as main sectional view of the present utility model.

As shown in the figure, overcoat [3] is fixedly connected on the valve body [1] by internal-jointed [2], cover [4] in the inwall of overcoat [3] is fixedly connected, the axial position of interior cover [4] is fixing by internal-jointed [2] and nut [6], screw rod [5] is installed in the neutral threaded hole of nut [6], the fixedly connected handle in upper end [7] of screw rod [5], one circular groove is arranged at the bottom, and insert in the upper connection [8], two pin-and-holes are arranged in upper connection [8], pin [9] is installed in this pin-and-hole and snaps in the circular groove of screw rod [5] bottom, make screw rod [5] form with upper connection [9] and be rotationally connected that piston [10] is fixedlyed connected with lower contact [11] with upper connection [8], the downside of piston [10] has the annulus of a projection along its cylindrical, fixedly connected with lower contact [11] in the upper end of straight-bar [12], the lower end connects valve block.

The utility model seal arrangement [13] is except that valve block, also can be designed to cone seal, be that the straight-bar lower end is designed to taper, and the size of this taper matches with valve body [1] two pipeline attachment hole size, the contact by taper and attachment hole realizes closing and opening of valve with separating.

Claims (9)

1. valve, comprise valve body [1], the overcoat [3] of fixedlying connected with valve body [1], at the fixedly connected nut in the upper end of overcoat [3] [6], there is tapped hole at middle part at nut [6], screw rod [5] is supporting with the tapped hole at nut [6] middle part, at the fixedly connected handle in the upper end of screw rod [5] [7], it is characterized in that: the bottom of screw rod [5] and upper connector [8] composition are rotationally connected.Piston [10] can move in overcoat [3] endoporus, the downside of piston [10] has the annulus of projection along its cylindrical, piston [10] is fixedlyed connected with following link [11] with upper connector [8], fixedly connected with following link [11] in the upper end of straight-bar [12], the lower end of straight-bar [12] is connected with seal arrangement [13].

2. valve according to claim 1, it is characterized in that: a circular groove is arranged at the bottom at screw rod [5], in upper connector [8] upper end the hole that matches with screw rod [5] lower end is arranged, at this place, hole one and above pin-and-hole are arranged, pin [9] is installed in this pin-and-hole and snaps in the circular groove of screw rod [5] bottom.

3. valve according to claim 1 and 2 is characterized in that: overcoat [3] is fixedlyed connected with valve body [1] by internal-jointed [2].

4. valve according to claim 1 and 2 is characterized in that: in the endoporus of overcoat [3] fixedly connected in the cover [4], piston [10] matches with interior cover [4], and can move therein.

5. valve according to claim 3 is characterized in that: in the endoporus of overcoat [3] fixedly connected in the cover [4], piston [10] matches with interior cover [4], and can move therein.

6. valve according to claim 1 and 2 is characterized in that: the seal arrangement [13] that straight-bar [12] lower end connects is a valve block.

7. valve according to claim 3 is characterized in that: the seal arrangement [13] that straight-bar [12] lower end connects is a valve block.

8. valve according to claim 4 is characterized in that: the seal arrangement [13] that straight-bar [12] lower end connects is a valve block.

9. valve according to claim 5 is characterized in that: straight-bar [12]] seal arrangement [13] that connects of lower end is valve block.

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