CN101509564A

CN101509564A - High-temperature high-pressure double-seal double-needle valve

Info

Publication number: CN101509564A
Application number: CNA2009100969705A
Authority: CN
Inventors: 金进星; 李容易; 金相鹤; 金相杨; 王国听
Original assignee: Wenzhou Golden Star Valve and Fitting Co Ltd
Current assignee: Wenzhou Golden Star Valve and Fitting Co Ltd
Priority date: 2009-03-24
Filing date: 2009-03-24
Publication date: 2009-08-19

Abstract

A high-temperature high-pressure dual-sealing dual-regulating needle valve comprises a valve body which is provided with a first needle valve and a second needle valve in serial connection. The first needle valve and the second needle valve are better arranged at the valve body in a mutually vertical way. The invention integrates the two needle valves as a whole, when the first needle valve leaks, the second needle valve can carry out a secondary sealing, thus resolving the leakage problem of the valve in high-temperature and high-pressure environment; meanwhile, the needle valve has the functions of blocking and flow regulating, thus realizing dual-sealing as well as dual-regulating of flow; the needle valve is applicable to the high-temperature and high-pressure high-sealing-property-required technical fields of industries such as electric power, metallurgy and petrochemical engineering, etc.

Description

High-temperature high-pressure double-seal double-needle valve

Technical field

The present invention relates to a kind of High Temperature High Pressure valve group, relate in particular to a kind of High Temperature High Pressure valve group that integrates the double-sealing of two needle type valves, two adjusting flows.

Background technique

The valve that high temperature and high pressure environment uses generally all is a metal hard-sealing, because metallic seal accomplishes that zero leakage is very difficult, therefore, often is the excessive and bitter brain of the leakage rate of valve at the high temperature and high pressure environment of industrial fields such as electric power, metallurgy, petrochemical industry.Particularly require to accomplish that the high temperature and high pressure environment of zero leakage is extremely difficult especially.

Summary of the invention

Technical problem to be solved by this invention provides a kind of high-temperature high-pressure double-seal double-needle valve, and this valve can solve problems such as high temperature and high pressure environment lower valve leakage.

The technology used in the present invention solution is: a kind of high-temperature high-pressure double-seal double-needle valve, comprise valve body, and polyphone is provided with first needle type valve and second needle type valve on the described valve body.

For ease of making and operation, described first needle type valve and second needle type valve preferably are vertically set on the valve body mutually.

Beneficial effect of the present invention is: because the present invention has adopted first needle type valve and the second needle type valve double sealing structure, and two needle type valves are integrated in one, when first needle type valve produces leakage, second needle type valve can carry out secondary seal, and at this moment the pressure of second needle type valve pressure that has been significantly less than first needle type valve can be realized reliable sealing, has solved the leakage problem of high temperature and high pressure environment lower valve preferably; Therefore simultaneously, needle type valve has the function of blocking and regulating flow, not only can realize that double-sealing can realize also that flow is two and regulate.The present invention have compact structure, leakage point quick and easy for installation, potential few, make that maintenance cost is low, characteristics such as High Temperature High Pressure reliable sealing and Flow-rate adjustment.The High Temperature High Pressure that is applicable to industries such as electric power, metallurgy, petrochemical industry requires the high technical field of sealability.

The invention will be further described below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is the plan view of an embodiment of the present invention;

Fig. 2 is the left view of an embodiment of the present invention;

Fig. 3 is a schematic diagram of the present invention;

Embodiment

As accompanying

drawing

1,2 illustrated embodiments, high-temperature high-pressure double-seal double-needle valve of the present invention comprises valve body 2, the first needle type valve A and the second needle type valve B, and the first needle type valve A and the second needle type valve B are vertically set on the valve body 2 mutually; The outlet end II of valve body 2 is provided with and takes over 1, and taking over 1 is that butt welding is connected with the pipe connecting end of valve body 2, to stop the interface leak that the High Temperature High Pressure temperature variation causes.

In the present embodiment, the first needle type valve A is identical with the structure of the second needle type valve B, with the second needle type valve B is that example comprises: valve body 2, valve gap B.1, filler B.2, valve rod B.3, locking nut B.4, screw B.5, handle B.6, dust cover B.7, Stem Mut B.8, position limit pin is B.9; B.1, valve body 2 is threaded with valve gap; Valve rod B.3 B.8 be threaded with Stem Mut and place valve gap B.1 among; B.8, B.1 Stem Mut is threaded with valve gap; Valve gap B.1 and valve rod be provided with filler B.2 between B.3, and B.8 compress filler by Stem Mut; B.4, B.1 B.8 locking nut gone up at valve gap by screw-threaded coupling with Stem Mut, prevents that bonnet nut is B.8 loosening; B.7, dust cover places B.8 upper end of bonnet nut, prevents that dust from entering between valve rod and the Stem Mut; B.6, handle places B.3 upper end and B.5 be fixed on valve rod by screw and B.3 go up of valve rod, realizes the keying of needle type valve with actuate valve stem.B.9, position limit pin is fastened on the valve body 2, places restrictions on valve gap and B.1 rotates.By handle B.6 rotary valve rod B.3 exercise down valve rod B.3 the tapering and valve body 2 when compressing the second needle type valve B close; The counterrotating valve rod B.3 make valve rod B.3 go upward to Stem Mut B.8 during dieback the second needle type valve B reach maximum opening, complete opening; Valve rod B.3 close and complete opening between during diverse location the second needle type valve B partly open, can regulate flow.

This invention working principle as shown in Figure 3, the first needle type valve A and second needle type valve B polyphone are distributed on the valve body 2, when medium when import I introduces, draw from outlet II by the first needle type valve A and the second needle type valve B, the second needle type valve B can carry out secondary seal when the first needle type valve A produces leakage, and at this moment the working pressure of the second needle type valve B has been significantly less than the working pressure of the first needle type valve A, is in low-pressure state work, can realize reliable sealing; Oppositely as the same, do not flow to restriction, solved the leakage problem of high temperature and high pressure environment lower valve preferably.

Claims

1, a kind of high-temperature high-pressure double-seal double-needle valve comprises valve body (2), it is characterized in that the last polyphone of described valve body (2) is provided with first needle type valve (A) and second needle type valve (B).

2, high-temperature high-pressure double-seal double-needle valve according to claim 1 is characterized in that described first needle type valve (A) and second needle type valve (B) are vertically set on the valve body (2) mutually.

3, high-temperature high-pressure double-seal double-needle valve according to claim 1 and 2 is characterized in that the outlet end (II) of described valve body (2) is provided with adapter (1), and taking over (1) is that butt welding is connected with the pipe connecting end of valve body (2).

4, high-temperature high-pressure double-seal double-needle valve according to claim 1 and 2, it is characterized in that described first needle type valve (A) is identical with the structure of second needle type valve (B), comprise: valve body (2), valve gap (B.1), filler (B.2), valve rod (B.3), locking nut (B.4), screw (B.5), handle (B.6), dust cover (B.7), Stem Mut (B.8), position limit pin (B.9); Valve body (2) is threaded with valve gap (B.1); Valve rod (B.3) is threaded with Stem Mut (B.8) and places among the valve gap (B.1); B.1, Stem Mut (B.8) is threaded with valve gap; Be provided with filler (B.2) between valve gap (B.1) and the valve rod (B.3) and compress filler by Stem Mut (B.8); Locking nut (B.4) and Stem Mut (B.8) by screw-threaded coupling on valve gap (B.1); Dust cover (B.7) places bonnet nut (B.8) upper end; Handle (B.6) places valve rod (B.3) upper end and is fixed on the valve rod (B.3) by screw (B.5), and position limit pin (B.9) is fastened on the valve body (2).

5, high-temperature high-pressure double-seal double-needle valve according to claim 3, it is characterized in that described first needle type valve (A) is identical with the structure of second needle type valve (B), comprise: valve body (2), valve gap (B.1), filler (B.2), valve rod (B.3), locking nut (B.4), screw (B.5), handle (B.6), dust cover (B.7), Stem Mut (B.8), position limit pin (B.9); Valve body (2) is threaded with valve gap (B.1); Valve rod (B.3) is threaded with Stem Mut (B.8) and places among the valve gap (B.1); B.1, Stem Mut (B.8) is threaded with valve gap; Be provided with filler (B.2) between valve gap (B.1) and the valve rod (B.3) and compress filler by Stem Mut (B.8); Locking nut (B.4) and Stem Mut (B.8) by screw-threaded coupling on valve gap (B.1); Dust cover (B.7) places bonnet nut (B.8) upper end; Handle (B.6) places valve rod (B.3) upper end and is fixed on the valve rod (B.3) by screw (B.5), and B.9 position limit pin is fastened on the valve body 2.