CN201842859U - Differential pressure switching device for RH (relative humidity) dry type vacuum-pumping system - Google Patents
Differential pressure switching device for RH (relative humidity) dry type vacuum-pumping system Download PDFInfo
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- CN201842859U CN201842859U CN2010205808623U CN201020580862U CN201842859U CN 201842859 U CN201842859 U CN 201842859U CN 2010205808623 U CN2010205808623 U CN 2010205808623U CN 201020580862 U CN201020580862 U CN 201020580862U CN 201842859 U CN201842859 U CN 201842859U
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- vacuum
- differential pressure
- main valve
- control unit
- electric controlled
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Abstract
The utility model discloses a differential pressure switching device for an RH (relative humidity) dry type vacuum-pumping system, which comprises an electric control vacuum main valve, a control unit, an electric control vacuum bypass valve and a differential pressure detector. The electric control vacuum main valve is arranged on a steelmaking process gas circuit, the control unit is used for controlling opening and closing of the electric control vacuum main valve, the electric control vacuum bypass valve and the differential pressure detector are arranged parallel to the vacuum main valve, a differential pressure detecting signal output end of the differential pressure detector is connected to a signal input end of the control unit, and a control signal output end of the control unit is connected with a control circuit of the electric control vacuum bypass valve. The differential pressure switching device can control opening, closing and switching timings of vacuum bypasses and the vacuum main valve by means of detecting differential pressure of the front and the rear of the vacuum main valve according to requirements of process models, and accordingly meets requirements of vacuum degrees of refining processes of different grades of steels.
Description
Technical field
The utility model relates to the parts of the steel secondary refining device that is used for production high-quality steel, particularly a kind of parts that are used for RH dry type pumped vacuum systems.
Background technology
The RH vacuum processing technique is a kind of steel secondary refining technology that is used for production high-quality steel, in the whole technology, the molten steel metallurgical reaction is to carry out in block has the vacuum tank of refractory lining, vacuum tank top is provided with the process gas outlet, be used for the process gas extraction is made the vacuum tightness that reaches required in the vacuum tank, RH dry type pumped vacuum systems adopts dry vacuum pump that process gas is carried out pump drainage, when refining difference steel grade, the desired vacuum tightness of technology has nothing in common with each other, and mainly contains light processing, this processing, ultra low-carbon steel is handled, unkilled steel is handled, deoxidized steel is handled five big process modelings.Existing pumped vacuum systems can't realize that the vacuum state of atmospheric pressure state and multiple vacuum tightness switches mutually, can not adapt to handle different steel grades (i.e. five big process modelings) refining whole process processing requirement.
At above-mentioned deficiency, need to explore a kind of atmospheric pressure state and multiple vacuum tightness vacuum state device for switching of realizing, make RH dry type pumped vacuum systems can adapt to the requirement of handling different steel grade refining whole process technologies.
Summary of the invention
In view of this, the utility model provides a kind of differential pressure shifter of the RH of being used for dry type pumped vacuum systems, this device is by the control to vacuum main valve and vacuum by-pass valve, can realize atmospheric pressure state and multiple vacuum tightness vacuum state device for switching, can make RH dry type pumped vacuum systems can adapt to the requirement of handling different steel grade refining whole process technologies.
The differential pressure shifter that is used for RH dry type pumped vacuum systems of the present utility model, comprise the electric controlled vacuum main valve that is arranged on the process for making gas circuit and be used to control the control unit that the electric controlled vacuum main valve opens and closes, also comprise the electric controlled vacuum by-pass valve and the differential pressure detector that are arranged in parallel with the vacuum main valve, the differential pressure detection signal output terminal of described differential pressure detector connects the signal input part of control unit, and the control signal output terminal of described control unit connects the pilot circuit of electric controlled vacuum by-pass valve.
Further, vacuum inspective meter I and vacuum inspective meter II are set respectively before and after the described electric controlled vacuum main valve, described vacuum inspective meter I and the vacuum tightness signal output part of vacuum inspective meter II are connected the signal input part of control unit respectively;
Further, described differential pressure detector two ends all are communicated with and are provided with electromagnet cut off valve.
The beneficial effects of the utility model: the differential pressure shifter that is used for RH dry type pumped vacuum systems of the present utility model, comprise the electric controlled vacuum main valve that is arranged on the process for making gas circuit and be used to control the control unit that the electric controlled vacuum main valve opens and closes, also comprise the electric controlled vacuum by-pass valve and the differential pressure detector that are arranged in parallel with the vacuum main valve, the differential pressure detection signal output terminal of described differential pressure detector connects the signal input part of control unit, the control signal output terminal of described control unit connects the pilot circuit of electric controlled vacuum by-pass valve, this device can be according to the process modeling requirement, before the vacuum main valve, after differential pressure detect, the keying and the switching time of control vacuum bypass and vacuum main valve are to satisfy the vacuum tightness requirement of different steel grade refining processs.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Embodiment
Fig. 1 is a structural representation of the present utility model, as shown in the figure: the differential pressure shifter that is used for RH dry type pumped vacuum systems of present embodiment, comprise the electric controlled vacuum main valve 2 that is arranged on the process for making gas circuit 1 and be used to control the control unit 3 that electric controlled vacuum main valve 2 opens and closes, also comprise the electric controlled vacuum by-pass valve 4 and the differential pressure detector 5 that are arranged in parallel with electric controlled vacuum main valve 2, the electric controlled vacuum by-pass valve also is a stopping valve, the differential pressure detection signal output terminal of described differential pressure detector 5 connects the signal input part of control unit 3, the control signal output terminal of described control unit 3 connects the pilot circuit of electric controlled vacuum by-pass valve 4, this device can be according to the different requirements of several process modelings to vacuum tightness, before detecting the vacuum main valve, after differential pressure, in time the differential pressure detection signal is back to control unit, control unit is controlled the keying and the switching time of vacuum bypass and vacuum main valve according to differential pressure signal, to reach different vacuum tightness, satisfy the vacuum tightness requirement of different steel grade refining processs.
In the present embodiment, described electric controlled vacuum main valve 2 front and back are provided with vacuum inspective meter I 6 and vacuum inspective meter II 7 respectively, described vacuum inspective meter I 6 and the vacuum tightness signal output part of vacuum inspective meter II 7 are connected the signal input part of control unit 3 respectively, to detect the vacuum tightness of electric controlled vacuum main valve front and back, and the vacuum tightness signal is back to control unit, control unit judges whether to reach keying and the switching time that required vacuum tightness is controlled vacuum bypass and vacuum main valve, to reach different vacuum tightness, satisfy the vacuum tightness requirement of different steel grade refining processs.
In the present embodiment, described differential pressure detector 5 two ends all are communicated with and are provided with electromagnet cut off valve 8 so that close at any time to the differential pressure detector safeguard, operation such as replacing.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. differential pressure shifter that is used for RH dry type pumped vacuum systems, comprise the electric controlled vacuum main valve (2) that is arranged on the process for making gas circuit (1) and be used to control the control unit (3) that electric controlled vacuum main valve (2) opens and closes, it is characterized in that: also comprise the electric controlled vacuum by-pass valve (4) and the differential pressure detector (5) that are arranged in parallel with electric controlled vacuum main valve (2), the differential pressure detection signal output terminal of described differential pressure detector (5) connects the signal input part of control unit (3), and the control signal output terminal of described control unit (3) connects the pilot circuit of electric controlled vacuum by-pass valve (4).
2. the differential pressure shifter that is used for RH dry type pumped vacuum systems according to claim 1, it is characterized in that: vacuum inspective meter I (6) and vacuum inspective meter II (7) are set respectively before and after the described electric controlled vacuum main valve (2), and described vacuum inspective meter I (6) and the vacuum tightness signal output part of vacuum inspective meter II (7) are connected the signal input part of control unit (3) respectively.
3. the differential pressure shifter that is used for RH dry type pumped vacuum systems according to claim 2 is characterized in that: described differential pressure detector (5) two ends all are communicated with and are provided with electromagnet cut off valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205808623U CN201842859U (en) | 2010-10-28 | 2010-10-28 | Differential pressure switching device for RH (relative humidity) dry type vacuum-pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205808623U CN201842859U (en) | 2010-10-28 | 2010-10-28 | Differential pressure switching device for RH (relative humidity) dry type vacuum-pumping system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201842859U true CN201842859U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205808623U Expired - Fee Related CN201842859U (en) | 2010-10-28 | 2010-10-28 | Differential pressure switching device for RH (relative humidity) dry type vacuum-pumping system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201842859U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943151A (en) * | 2012-10-24 | 2013-02-27 | 杭州杭真真空工程技术有限公司 | Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump |
| CN109402330A (en) * | 2018-12-28 | 2019-03-01 | 中冶京诚工程技术有限公司 | A kind of RH vacuum system adjusts vacuum plant and application |
-
2010
- 2010-10-28 CN CN2010205808623U patent/CN201842859U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943151A (en) * | 2012-10-24 | 2013-02-27 | 杭州杭真真空工程技术有限公司 | Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump |
| CN102943151B (en) * | 2012-10-24 | 2015-05-06 | 杭州杭真真空工程技术有限公司 | Steel liquid vacuum refinement system adopting complete-dry type mechanical vacuum pump |
| CN109402330A (en) * | 2018-12-28 | 2019-03-01 | 中冶京诚工程技术有限公司 | A kind of RH vacuum system adjusts vacuum plant and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20191028 |