CN201339736Y

CN201339736Y - Metal film-type pressure reducing valve

Info

Publication number: CN201339736Y
Application number: CNU2008201245932U
Authority: CN
Inventors: 李峰; 俞晓龙; 刘际
Original assignee: BEIJING AEROSPACE WANYUAN COAL CHEMICAL ENGINEERING TECHNOLOGY Co Ltd
Current assignee: BEIJING AEROSPACE WANYUAN COAL CHEMICAL ENGINEERING TECHNOLOGY Co Ltd
Priority date: 2008-12-29
Filing date: 2008-12-29
Publication date: 2009-11-04
Anticipated expiration: 2018-12-29

Abstract

The utility model provides a metal film-type gas pressure reducing valve, which comprises a valve body (1), a main spring box (2), a valve stem (5) and a diaphragm (8), wherein the valve body (1) is provided with a flow channel, and the main spring box (2) is arranged on the valve body (1); and the valve body (1) is provided with a first end part which is arranged in the flow channel of the valve body (1) and a second end part which is arranged in the main spring box (2), and the diaphragm (8) is arranged on the second end part of the valve stem. The metal film-type gas pressure reducing valve is characterized in that the diaphragm (8) is of a corrugated diaphragm made of metal. With the diaphragm with the special structure, not only the up-down movement of the valve stem and the valve seal can be ensured, but also the diaphragm can not be destroyed due to too large pressure in a piping system.

Description

Metallic film type reducing valve

Technical field

The utility model relates to a kind of reduction valve, especially for the metallic film type reducing valve of hyperbaric oxygen air pipe.

Background technique

Reduction valve is a kind of pressure regulator that the energy of dependence pipeline medium own carries out work.The classification of reduction valve is a lot, roughly can be divided into two kinds of direct acting type (self-powering type) and indirect acting types (commander's formula) according to its operating principle.Directacting reducing valve is compared with the indirect acting type reduction valve, and it has simple in structure, the advantage that reliable operation and cost are low.So under the less demanding occasion of the precision of voltage regulation, mostly adopt Directacting reducing valve.Directacting reducing valve is crossed the direction branch of reduction valve by gas stream: forward reduction valve, reverse reduction valve; Sensing element by reduction valve can be divided into: diaphragm type reduction valve, plunger type reduction valve, bellows-type reduction valve.

The metallic film type gas pressure reducer is a kind of direct effect, forward, Diaphragm reducing valve.The pressure that it is mainly used in the oxygen pipeline system of Coal Chemical Industry gasification oven igniting usefulness is regulated, the high pressure oxygen that is about to inlet is reduced to the needed low-pressure of system, and when inlet pressure changed, outlet pressure remains in the little allowed band of level change slightly.

And also there is following problem in current metallic film type gas pressure reducer.

One, since the decompressor internal leakage when causing overpressure in the pipeline, diaphragm breakage may occur, thereby may cause taking place the phenomenon of oxygen leakage.

Two, because design is unreasonable, it is slow that reduction valve reaches the speed of rated flow, is not suitable for working condition requirement.

The model utility content

In order to address the above problem, the utility model proposes a kind of metallic film type gas pressure reducer.This reduction valve comprises: the valve body with runner; Be arranged on the main spring case on the valve body; Valve rod, it has the first end in the runner that is arranged on valve body and is arranged on the interior the second end of described main spring case; Be installed in the diaphragm on the valve rod the second end.This reduction valve is characterised in that: described diaphragm is the corrugated diaphragm that is made of metal.Adopt the diaphragm of this special construction, can guarantee valve rod in knee-action and valve seal, prevent that the excessive diaphragm that causes of pressure in the pipe-line system from destroying.

Preferably, described reduction valve also comprises the main spring that is arranged in the main spring case, is used for applying precompression to described diaphragm.More preferably, described reduction valve also comprises the precompression controlling device that is positioned at described main spring case.

Preferably, valve disc and valve disc sealing gasket are installed on the first end of valve rod, are processed with recess in the wherein said valve disc, described valve disc sealing gasket embeds in the described recess.

Preferably, described reduction valve also comprises to described valve disc and applies precompression to cut out the auxiliary spring of runner.

Preferably, described valve body comprises that medium enters chamber, medium discharge side and pressure regulating cavity, its medium enters chamber and valve inlet UNICOM, medium discharge side and valve export UNICOM, the diaphragm of pressure regulating cavity in described main spring case opened, and the first end of described valve rod is arranged on medium and enters between chamber and the medium discharge side.More preferably, the outlet port has the pressure feedback passage with pressure regulating cavity UNICOM.

Description of drawings

Accompanying drawing 1 is the overall structure cut-away view of reduction valve of the present utility model;

Accompanying drawing 2 is the valve body cut-away view of reduction valve of the present utility model;

Reference numerals list:

Cushion block, 11 main springs, 12 main spring seats, 13 adjustment screw rods, 14 protective caps, 15 valve inlets, 16 media enter chamber, 17 medium discharge sides, 18 pressure feedback passages, 19 pressure regulating cavities, 20 valve exports on 1 valve body, 2 main spring casees, 3 lower end caps, 4 auxiliary springs, 5 valve rods, 6 valve discs, 7 valve disc sealing gaskets, 8 diaphragms, 9 diaphragm lower cushion blocks, 10 diaphragms

Embodiment:

Next will make detailed explanation to preferred embodiment of the present utility model in conjunction with the accompanying drawings.

As depicted in figs. 1 and 2, reduction valve of the present utility model comprises: the valve body 1 with runner; Be arranged on the main spring case 2 on the valve body 1; Valve rod 5, it has first end and the second end that is arranged in the described main spring case 2 in the runner that is arranged on valve body 1; Be installed in the diaphragm 8 on the second end of valve rod 5.Wherein, described diaphragm is the corrugated diaphragm that is made of metal.The diaphragm of being made by foil itself has the intensity bigger than materials such as rubber, not cracky.Simultaneously, diaphragm is made bellows-shaped, can when pressure raises suddenly, utilize the shape of convolution diaphragm itself that pressure buffer is provided, so just further eliminated the possibility of diaphragm breakage, thereby the situation that can advantageously prevent dielectric leakage takes place.

Valve body 1 has three chambeies, and medium enters chamber 16, medium discharge side 17 and pressure regulating cavity 19.Its medium enters chamber 16 and valve inlet 15 UNICOMs, medium discharge side 17 and valve export 20 UNICOMs, and the diaphragm 8 of pressure regulating cavity 19 in described main spring case 2 opened.The first end of valve rod 5 is arranged on medium and enters between chamber 16 and the medium discharge side 17.Valve disc 6 and valve disc sealing gasket 7 are installed on the first end of valve rod 5, and the joint that enters chamber 16 and medium discharge side 17 at medium is provided with the valve seat (not shown).Be provided with auxiliary spring 4 in the medium discharge side 17, be used for exerting pressure, valve seat 6 is pressed against on the valve seat tightly to valve seat 6, thus the fluid passage in the blocking-up valve body 1, and auxiliary spring 4 also plays the effect of auxiliary seal simultaneously.

The lower end of valve body 1 compresses with lower end cap 3 and is connected, thereby forms medium discharge side 17.Pack into the second end of valve rod 5 of diaphragm 8 is fixed on the valve rod 5.Preferably, in the upper and lower surface of diaphragm 8 cushion block 10 on diaphragm lower cushion block 9 and the diaphragm is installed respectively.Main spring seat 12 and main spring 11 are pressed on the diaphragm on the cushion block 10, and the adjustment screw rod 13 that is contained on the main spring case 2 withstands on the main spring seat 12.Adjust screw rod 13, protective cap 14 is contained on the main spring case 2.

Main spring case 2 links together by connection sets such as bolt and valve body 1.Open the lower end of main spring case 2, thereby expose diaphragm 8.Open towards diaphragm 8 upper end of the pressure regulating cavity 19 of valve body 1, thereby form the pressure regulating cavity 19 of sealing between diaphragm 8 and valve body 1.

Valve outlet 20 places are pressure feedback passage 18, and this pressure feedback passage 18 is connected to pressure regulating cavity 19 from valve outlet 20.Be used for the pressure between balance valve outlet 20 and the pressure regulating cavity 19.

The working procedure of reduction valve of the present utility model is as follows:

During proper functioning, reduction valve of the present utility model is installed in the middle of the system pipeline, medium flow into medium from valve inlet 15 and enters chamber 16.When pressure medium is raised to a certain predetermined value, the valve disc 6 of medium discharge side 17 is opened, medium flows into medium discharge side 17, and the pressure of medium discharge side 17 is raise.At this moment, the pressure of medium discharge side 17 can feed back to pressure regulating cavity 19 by the pressure feedback passage 18 at valve export 20 places.When valve export 20 pressure that link to each other with medium discharge side 17 are raised to certain value, the feedback pressure of pressure regulating cavity 19 will promote diaphragm 8 and drive valve rod 5, valve disc 6 moves up, thereby reduced the aperture of valve.The reduction of valve opening can make the pressure in the medium discharge side 17 reduce, thereby reduces the pressure of valve export 20; Equally, when outlet pressure dropped to certain value, feedback pressure descended, and diaphragm 8 is moved down under the effect of main spring 11, thereby increased valve opening, and downstream pressure is gone up.Reciprocal like this making in the scope that outlet pressure is stabilized in a setting.

Claims

1, a kind of metallic film type gas pressure reducer, it comprises:

Valve body (1) with runner;

Be arranged on the main spring case (2) on the valve body (1);

Valve rod (5), it has the first end in the runner that is arranged on valve body (1) and is arranged on the interior the second end of described main spring case (2);

Be installed in the diaphragm (8) on valve rod (5) the second end,

It is characterized in that:

Described diaphragm (8) is the corrugated diaphragm that is made of metal.

2, metallic film type gas pressure reducer according to claim 1 also comprises the main spring (11) that is arranged in the main spring case (2), is used for applying precompression to described diaphragm (8).

3, metallic film type gas pressure reducer according to claim 2 also comprises the precompression controlling device that is positioned at described main spring case (2).

4, according to each described metallic film type gas pressure reducer among the claim 1-3, it is characterized in that: valve disc (6) and valve disc sealing gasket (7) are installed on the first end of valve rod (5), wherein said valve disc is processed with recess in (6), and described valve disc sealing gasket (7) embeds in the described recess.

5, metallic film type gas pressure reducer according to claim 4 is characterized in that: also comprise to described valve disc (6) applying the auxiliary spring (4) of precompression to close runner.

6, according to each described metallic film type gas pressure reducer among the claim 1-5, it is characterized in that: described valve body (1) comprises that medium enters chamber (16), medium discharge side (17) and pressure regulating cavity (19), its medium enters chamber (16) and inlet (15) UNICOM, medium discharge side (17) and outlet (20) UNICOM, the diaphragm (8) of pressure regulating cavity (19) in described main spring case (2) opens wide, and the first end of described valve rod (5) is arranged on medium and enters between chamber (16) and the medium discharge side (17).

7, metallic film type gas pressure reducer according to claim 6 is characterized in that: outlet (20) locates to have the pressure feedback passage (18) with pressure regulating cavity (19) UNICOM.