CN202091526U

CN202091526U - Stop valve with unrotatable valve rod

Info

Publication number: CN202091526U
Application number: CN201120170529XU
Authority: CN
Inventors: 田洪卫
Original assignee: Fluoroseal Special Valves (suzhou) Co Ltd
Current assignee: SUZHOU KEDI FLUID CONTROL EQUIPMENT CO., LTD.
Priority date: 2011-05-25
Filing date: 2011-05-25
Publication date: 2011-12-28
Anticipated expiration: 2021-05-25

Abstract

The utility model discloses a stop valve with an unrotatable valve rod, including a valve body, a valve seat and a valve rod which are arranged in the valve body, valve clacks disposed on a lower end of the valve rod and fixedly connected with the valve rod and a sealing device disposed between the valve rod and the valve body; a driving device is connected with the valve rod on a portion out of the valve body; the valve seat is disposed between the valve clacks and the valve body; a spline groove is disposed on the valve rod; a spline bushing and a bushing seat are disposed between the sealing device and the valve body; and the spline bushing and the spline groove are correspondingly arranged. The stop valve provided by the utility model is long in service life, good in sealing performance, easy for maintenance and very practical.

Description

The stop valve that a kind of valve rod can not revolve

Technical field

The utility model relates to a kind of valve, and the stop valve that particularly a kind of valve rod can not revolve guaranteeing the sealing of valve, and prolongs its life-span.

Background technique

Characteristics such as stop valve is little, durable owing to frictional force between its opening-closing process sealing surface, Lift is made not quite, easily and easy to maintenance become most popular a kind of valve.Stop valve belongs to the forced seal valve, must exert pressure to flap during valve closes and not reveal with forced seal face, and the MEDIA FLOW of stop valve is to for from top to bottom, and promptly medium enters valve pocket in the valve body by the flap top, takes place with the phenomenon of avoiding the stressed bending of valve rod.

Modal in the market stop valve, mainly form by valve body, valve rod, lining, valve gap, filler etc., drive the valve rod rotation by drive unit, and then the keying of realization valve, constantly opening and closing during owing to valve working, valve rod is constantly rotation also, make that flap, filler etc. are easy to wear, cause the sealability variation, and because parts such as valve rod and filler, lining only are fitted and connected, maintenance is inconvenience comparatively.Therefore, how to avoid descending, and valve is for ease of maintenaince maintained, become the problem that needs solution because of the sealability that the valve rod rotation causes.

The model utility content

For solving the problems of the technologies described above, the stop valve that the utility model provides a kind of valve rod to revolve guaranteeing the sealability of valve in the using process, and makes that valve is easy to safeguard.

For achieving the above object, the technical solution of the utility model is as follows:

The stop valve that a kind of valve rod can not revolve, comprise valve body, be arranged on valve seat and valve rod in the described valve body, in described valve rod lower end and the flap of fixedlying connected, the seal arrangement between described valve rod and described valve body with described valve rod, described valve rod stretches out the outer part of described valve body and is connected with drive unit, described valve seat is between described flap and described valve body, described valve rod is provided with spline, be provided with spline lining and liner clamp between described seal arrangement and the described valve body, described spline lining is corresponding mutually with described spline.

Preferably, described seal arrangement is made up of filler group and filler flange.

Preferably, described filler group is fixedlyed connected with described valve rod, and it comprises Packing seat and filler, and described filler is between described Packing seat and described filler flange.

Preferably, described filler flange is fastenedly connected by fastening piece and described valve body.

Preferably, described fastening piece is bolts and nuts.

Pass through technique scheme, the stop valve that a kind of valve rod that the utility model provides can not revolve, its valve rod is provided with spline, be provided with spline lining and the liner clamp supporting between seal arrangement and the valve body with spline, this spline the rotation that can prevent valve rod is set, avoid the wearing and tearing of parts such as filler, flap, prolonged the life-span of valve; The filler group is fixedlyed connected with described valve rod, together with the parts such as flap that are fixedly connected on the valve rod, can take out above-mentioned parts in the lump by taking out valve rod when safeguarding, for ease of maintenaince reaches maintenance.Therefore, the stop valve that this model utility provides has long, the good seal performance of life of valve, and for ease of maintenaince, characteristics such as maintenance, have good practicability.

Description of drawings

In order to be illustrated more clearly in the technological scheme among the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below.

The structural representation of the stop valve that Fig. 1 can not revolve for the disclosed a kind of valve rod of the utility model embodiment;

The spline structure of the stop valve that Fig. 2 can not revolve for the disclosed a kind of valve rod of the utility model embodiment and the structural representation of seal arrangement.

11. valve body, 12. valve seats, 13. valve rods, 14. flaps, 15. filler groups, 16. filler flanges, 17-a. bolt, 17-b. nut, 18. drive units, 21. Packing seats, 22. fillers, 23. liner clamps, 24. spline linings, 25. splines

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described.

The stop valve that the utility model provides a kind of valve rod to revolve, this stop valve have long service life, good seal performance and for ease of maintenaince, characteristics such as maintenance, have good practicability.

According to Fig. 1～2, the stop valve that this model utility provides comprises valve body 11, be arranged on valve seat 12 and valve rod 13 in the valve body 11, in valve rod 13 lower ends and the flap 14 of fixedlying connected, the seal arrangement between valve rod 13 and valve body 11 with valve rod 13, valve rod 13 stretches out valve body 11 outer parts and is connected with drive unit 18, and valve seat 12 is between flap 14 and valve body 11.Wherein, valve rod 13 is provided with spline 25, is provided with spline lining 24 and liner clamp 23 between seal arrangement and the valve body 11, and spline lining 24 is corresponding mutually with spline 25 positions; Seal arrangement is made up of filler group 15 and filler flange 16, filler group 15 comprises Packing seat 21 and filler 22 and fixedlys connected with valve rod 13, filler 22 is between Packing seat 21 and filler flange 16, and filler flange 16 is fastenedly connected by bolt 17-a and nut 17-b fastening piece and valve body 11.

During valve closes, drive unit 18 drives and moves down by the valve rod 13 that Stem Mut 19 is connected with it, and flap 14 and valve seat 12 are pressed together closely, realizes closing of valve; On the contrary, backward rotation drive unit 18, Stem Mut 19 rotation upwards and on the guiding valve rod 13 moves, and flap 14 separates with valve seat 12 and realizes the unlatching of valve.Owing to be provided with spline 25 with spline lining 24 corresponding positions on the valve rod 13, therefore, when realizing valve opening and closing, valve rod 13 can only move up and down and can not rotate, avoided owing to the wearing and tearing of rotating parts such as the flap 14 cause, filler 22, avoid the leakage of valve, prolonged the life-span of valve; In addition,,, can take out above-mentioned parts in the lump by taking out valve rod 13 when safeguarding, for ease of maintenaince reach maintenance together with flap 14 parts such as grade that are fixedly connected on the valve rod 13 because filler group 15 is fixedlyed connected with valve rod 13.

In addition, filler flange 16 can also adopt bearing pin pin-and-hole structure except tightening together by bolt 17-a nut 17-b and valve body 13, and this is not limited.

The stop valve that this model utility provides has stoped the rotation of valve rod 13 in the valve opening and closing process owing to valve rod 13 is provided with spline 25, has avoided the wearing and tearing of relevant contact component, guarantees its sealability and has prolonged life-span of valve; The integrated design of parts such as filler group 15, flap 14 and valve rod 13 makes characteristics such as this stop valve has for ease of maintenaince, maintenance to have good practicability.

To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims

1. stop valve that valve rod can not revolve, comprise valve body, be arranged on valve seat and valve rod in the described valve body, the flap that is positioned at described valve rod lower end and fixedlys connected with described valve rod, seal arrangement between described valve rod and described valve body, described valve rod stretches out the outer part of described valve body and is connected with drive unit, described valve seat is between described flap and described valve body, it is characterized in that, described valve rod is provided with spline, be provided with spline lining and liner clamp between described seal arrangement and the described valve body, described spline lining is corresponding mutually with described spline position.

2. the stop valve that valve rod according to claim 1 can not revolve is characterized in that described seal arrangement is made up of filler group and filler flange.

3. the stop valve that valve rod according to claim 2 can not revolve is characterized in that, described filler group is fixedlyed connected with described valve rod, and it comprises Packing seat and filler, and described filler is between described Packing seat and described filler flange.

4. the stop valve that valve rod according to claim 2 can not revolve is characterized in that, described filler flange is fastenedly connected by fastening piece and described valve body.

5. the stop valve that valve rod according to claim 4 can not revolve is characterized in that, described fastening piece is bolts and nuts.