CN201765520U - Pressure-stabilizing control device of liquefying equipment - Google Patents
Pressure-stabilizing control device of liquefying equipment Download PDFInfo
- Publication number
- CN201765520U CN201765520U CN2010205065476U CN201020506547U CN201765520U CN 201765520 U CN201765520 U CN 201765520U CN 2010205065476 U CN2010205065476 U CN 2010205065476U CN 201020506547 U CN201020506547 U CN 201020506547U CN 201765520 U CN201765520 U CN 201765520U
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- China
- Prior art keywords
- pressure
- liquefaction
- nitrogen
- decompressor
- automatic regulating
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Abstract
The utility model relates to a pressure control device in the metallurgy industry, in particular to a pressure-stabilizing control device of liquefying equipment, and comprises a medium-pressure nitrogen compressor and a liquefying expander, wherein the medium-pressure nitrogen compressor is connected with a nitrogen pipe net by a pipeline; nitrogen is introduced into the nitrogen pipe net; the liquefying expander is connected on a connecting pipeline of the medium-pressure nitrogen compressor and the nitrogen pipe net; the connecting pipeline of the liquefying expander and the nitrogen pipe net is provided with a pressure-adjusting valve group; and pressure signals of the pressure-adjusting valve group are communicated with pressure signals on a gas inlet pipe of the liquefying expander. The pressure signals on a gas inlet pipeline of the liquefying equipment can be transmitted into the pressure-adjusting valve group by the added pressure-regulating valve group, and the pressure of the gas inlet pipeline of the liquefying equipment is adjusted and controlled so as to guarantee stable pressure.
Description
Technical field
The utility model relates to a kind of pressure control device of metallurgy industry, a kind of specifically liquefaction device voltage stabilizing control device.
Background technology
Oxygen, nitrogen are common used in industry gas, are widely used in industries such as electronics, metallurgy.Oxygen, nitrogen supply (NS) at present, the one, by the commercial production product gas, give the user through overcompression; The 2nd, liquid oxygen, liquid nitrogen product are given the user, use after the user is gasified.The production of liquid oxygen, liquid nitrogen mainly divides and liquefaction device production by empty, is convenient to transportation, mainly changes greatly at consumption, demand is less, has inconvenient traffic, and uses among the user of no gas generation.When iron and steel enterprise produces, oxygen, nitrogen are that discontinuity is used during because of blowing, ductwork pressure alters a great deal, the liquefaction device pressure transient causes decompressor tolerance instability, easily causes liquefaction decompressor hypervelocity to damage, be liquefaction device safety, the liquefaction device load is had to away from optimum load production, and efficient can not get performance, influences the output of fluid product.
Summary of the invention
Technical problem to be solved in the utility model is: at the shortcoming of above prior art existence, a kind of liquefaction device voltage stabilizing control device is proposed, can keep the stable of liquefaction device admission pressure, can bring into play the liquefaction device production potential, guarantee the safe operation of liquefaction device.
The technical scheme that the utility model solves above technical matters is:
Liquefaction device voltage stabilizing control device, press nitrogen compressor and liquefaction decompressor in comprising, the middle nitrogen compressor of pressing is connected with the nitrogen pipe network by pipeline, nitrogen is sent in the nitrogen pipe network, during being connected on, the liquefaction decompressor presses on the connecting tube of nitrogen compressor and nitrogen pipe network, be provided with a cover pressure regulator valve group on the connecting tube of liquefaction decompressor and nitrogen pipe network, the pressure signal of pressure regulator valve group is communicated with pressure signal on the decompressor draft tube that liquefies.
Like this, liquefaction device air inlet pipeline pressure signal can be sent into the pressure regulator valve group, liquefaction device air inlet pipeline pressure is adjusted control, guarantee pressure stability by a cover pressure regulator valve group that increases.
The technical scheme that the utility model further limits is: the pressure regulator valve group is made up of two hand valves, an automatic regulating valve and a by-pass valve, two hand valves and an automatic regulating valve are located on the connecting tube of liquefaction decompressor and nitrogen pipe network, in the middle of automatic regulating valve is arranged on, hand valve lays respectively at before and after the automatic regulating valve, and by-pass valve is connected with hand valve is related with automatic regulating valve.When variable valve fault or maintenance,, do not cause nitrogen supply (NS) to interrupt by the by-pass valve air feed.
Liquefaction decompressor draft tube links to each other with automatic regulating valve with a pressure governor by a pressure unit, liquefaction decompressor suction press signal converts electric signal to by pressure unit, give pressure governor, regulate the output electric signal through PID and come the by-pass valve control aperture to the pressure regulator valve group, liquefaction decompressor air inlet pipeline pressure is adjusted control, guarantee pressure stability, scalable.All be connected to a tensimeter, clearer demonstration pressure, handled easily before the automatic regulating valve and before the pressure unit.
The utility model has the advantages that: the utility model equipment disposition is simple, investment is little, only need set up a cover pressure regulator valve group, just can finish the stable of liquefaction device admission pressure effectively, to performance liquefaction device production potential, the safe operation that guarantees liquefaction device has very big help, reduces the fluctuation of nitrogen compressor top hole pressure simultaneously, and the stable operation of compressor is also brought bigger benefit.
Description of drawings
Fig. 1 is a connection diagram of the present utility model.
Embodiment
Embodiment one
Present embodiment is a kind of liquefaction device voltage stabilizing control device, press nitrogen compressor 1 and liquefaction decompressor 2 in comprising, the middle nitrogen compressor 1 of pressing is connected with nitrogen pipe network 7 by pipeline, nitrogen is sent in the nitrogen pipe network 7, during being connected on, liquefaction decompressor 2 presses on the connecting tube of nitrogen compressor 1 and nitrogen pipe network 7, be provided with a cover pressure regulator valve group on the connecting tube of liquefaction decompressor 2 and nitrogen pipe network 7, the pressure signal of pressure regulator valve group is communicated with pressure signal on decompressor 2 draft tube that liquefy.The pressure regulator valve group is made up of two hand valves 4, an automatic regulating valve 3 and a by-pass valve 5, two hand valves 4 and an automatic regulating valve 3 are located on the connecting tube of liquefaction decompressor 2 and nitrogen pipe network 7, in the middle of automatic regulating valve 3 is arranged on, hand valve 4 lays respectively at automatic regulating valve 3 front and back, by-pass valve 5 and hand valve 4 and 3 related connections of automatic regulating valve.Liquefaction decompressor 2 draft tube link to each other with automatic regulating valve 3 with a pressure governor 9 by a pressure unit 6, pressure unit 6 becomes electric signal with variable voltage signal, be transferred to automatic regulating valve 3, thereby realize liquefaction device air inlet pipeline pressure signal is sent into the pressure regulator valve group, liquefaction device air inlet pipeline pressure is adjusted control.Liquefaction decompressor 2 suction press signals convert electric signal to by pressure unit 6, give pressure governor 9, regulate the output electric signal through PID and come the by-pass valve control aperture, liquefaction decompressor air inlet pipeline pressure is adjusted control, guarantee pressure stability, scalable to the pressure regulator valve group.All be connected to a tensimeter 8 before the automatic regulating valve 3 and before the pressure unit 6, clearer demonstration pressure, the pressure regulator valve group is carried out constant voltage control according to the pressure gauge setting pressure.
The utility model can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the claimed scope of the utility model.
Claims (4)
1. liquefaction device voltage stabilizing control device, press nitrogen compressor and liquefaction decompressor in comprising, press nitrogen compressor to be connected with the nitrogen pipe network in described by pipeline, nitrogen is sent in the nitrogen pipe network, described liquefaction decompressor is connected on the connecting tube of described middle pressure nitrogen compressor and nitrogen pipe network, it is characterized in that: be provided with a cover pressure regulator valve group on the connecting tube of described liquefaction decompressor and nitrogen pipe network, the pressure signal of described pressure regulator valve group is communicated with pressure signal on the described liquefaction decompressor draft tube.
2. liquefaction device voltage stabilizing control device as claimed in claim 1, it is characterized in that: described pressure regulator valve group is made up of two hand valves, an automatic regulating valve and a by-pass valve, described two hand valves and an automatic regulating valve are located on the connecting tube of described liquefaction decompressor and nitrogen pipe network, in the middle of described automatic regulating valve is arranged on, described hand valve lays respectively at before and after the described automatic regulating valve, and described by-pass valve is connected with described hand valve is related with automatic regulating valve.
3. liquefaction device voltage stabilizing control device as claimed in claim 2 is characterized in that: described liquefaction decompressor draft tube links to each other with described automatic regulating valve with a pressure governor by a pressure unit.
4. liquefaction device voltage stabilizing control device as claimed in claim 3 is characterized in that: all be connected to a tensimeter before the described automatic regulating valve and before the pressure unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205065476U CN201765520U (en) | 2010-08-27 | 2010-08-27 | Pressure-stabilizing control device of liquefying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205065476U CN201765520U (en) | 2010-08-27 | 2010-08-27 | Pressure-stabilizing control device of liquefying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201765520U true CN201765520U (en) | 2011-03-16 |
Family
ID=43718129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205065476U Expired - Lifetime CN201765520U (en) | 2010-08-27 | 2010-08-27 | Pressure-stabilizing control device of liquefying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201765520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613316A (en) * | 2015-02-16 | 2015-05-13 | 上海大众祥源动力供应有限公司 | Pressure control equipment for compressed air system |
-
2010
- 2010-08-27 CN CN2010205065476U patent/CN201765520U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613316A (en) * | 2015-02-16 | 2015-05-13 | 上海大众祥源动力供应有限公司 | Pressure control equipment for compressed air system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110316 |