CN204401047U - Mechanical pump combined mechanism in a kind of RH a refining unit - Google Patents
Mechanical pump combined mechanism in a kind of RH a refining unit Download PDFInfo
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- CN204401047U CN204401047U CN201520019068.4U CN201520019068U CN204401047U CN 204401047 U CN204401047 U CN 204401047U CN 201520019068 U CN201520019068 U CN 201520019068U CN 204401047 U CN204401047 U CN 204401047U
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- pump
- combined mechanism
- ladle
- mechanical pump
- refining
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Abstract
The utility model provides the mechanical pump combined mechanism in a kind of RH a refining unit, belongs to metallurgical technology field.To it solve in prior art the mechanical pump easily technical problem such as stuck.This device comprises refining furnace, upcast, downtake, ladle one and ladle two; Vacuum chamber is offered in refining furnace; The upper end of upcast is connected with vacuum chamber, and lower end is dipped in ladle one; The upper end of downtake is connected with vacuum chamber, and downtake can be dipped in ladle two; This device also comprises a mechanical pump combined mechanism, and mechanical pump combined mechanism comprises several one-level lobe pumps be in parallel, several secondary lobe pumps be in parallel and several water ring vacuum pumps be in parallel.The utility model has the mechanical pump not easily advantage such as stuck.
Description
Technical field
The utility model belongs to metallurgical technology field, relates to the mechanical pump combined mechanism in a kind of RH a refining unit.
Background technology
RH refining belongs to the one of external refining, and external refining is exactly poured in ladle or special container by the molten steel of just refining in converter or electric furnace to carry out deoxidation, desulfurization, decarburization, degas, remove non-metallic inclusion and adjustment molten steel component and temperature to reach the process for making smelting object further.
The means of external refining are a lot, as wash heat, vacuum, stirring, winding-up, heating and filtration.Wherein, vacuum refinement refers to and is placed in vacuum chamber by molten steel, and because vacuum action makes reaction move to generation gas direction, to reach degassed, deoxidation, decarburization, removal the object such as to be mingled with.
The principle of work of RH purifying method is as follows: have two circulation tubes (rising and downtake) in vacuum chamber bottom.During degassed process, circulating pipe to be inserted in molten steel and to vacuumize, because vacuum is pumped into by vacuum chamber, molten steel rises to pressure reduction height in two pipes, meanwhile be blown in upcast and drive argon gas same, make to produce a large amount of bubble instantaneously in upcast, bubble is at high temperature, low pressure effect lower volume undergoes rapid expansion, molten steel density reduces, be that raindrop shape sprays into vacuum chamber with molten steel with the speed of about 5m/s, degassed surface-area is increased greatly, gas in addition in molten steel gradually to Argon Bubble internal diffusion, thus accelerates degassed process.Molten steel after degassed collects in bottom vacuum chamber, because downtake molten steel density is relatively large, molten steel with the speed of 1-2m/s not cracked ends downtake return ladle.Molten steel is after continuous circulation several, and degasification process just comes to an end.
But still there is certain problem in above-mentioned RH method of refining and related device: 1, there are more dust, wet etc. in vacuum chamber, easily causing the phenomenon that mechanical pump is stuck when vacuumizing.
Summary of the invention
The utility model is the problems referred to above existed for existing technology, and provide a kind of RH a refining unit, technical problem to be solved in the utility model is: mechanical pump when avoiding liquid steel refining is because vacuum house dust is too much stuck.
The purpose of this utility model realizes by following technical proposal:
A mechanical pump combined mechanism in RH a refining unit, described RH a refining unit comprises refining furnace, upcast, downtake, ladle one and ladle two; Vacuum chamber is offered in described refining furnace; The upper end of described upcast is fixed on the bottom of refining furnace and is connected with described vacuum chamber, and the sidewall of described upcast is connected with a tunger tube be connected with this upcast, and the lower end of described upcast can be dipped in ladle one; The upper end of described downtake is fixed on the bottom of refining furnace and is connected with described vacuum chamber, and the lower end of described downtake can be dipped in ladle two; It is characterized in that, described mechanical pump combined mechanism comprises several one-level lobe pumps be in parallel, several secondary lobe pumps be in parallel and several water ring vacuum pumps be in parallel, each one-level lobe pump is all in series with valve one and is connected with described vacuum chamber by an inlet manifold, each secondary lobe pump is all in series with valve three and is connected with one-level lobe pump by pipeline, one end of each water ring vacuum pump is connected with secondary lobe pump by pipeline, and the other end of each water ring vacuum pump is then connected with an exhaust-gas receiver.
In mechanical pump combined mechanism in above-mentioned a kind of RH a refining unit, described inlet manifold is provided with pressure transmitter, and described mechanical pump combined mechanism also comprises the heat exchanger be connected with described secondary lobe pump.
In mechanical pump combined mechanism in above-mentioned a kind of RH a refining unit, described mechanical pump combined mechanism also comprises the one-level bypass be in parallel with described one-level lobe pump, and described one-level bypass is in series with valve two.
In mechanical pump combined mechanism in above-mentioned a kind of RH a refining unit, the bypass two of being with atmospheric jet pump is also provided with between described secondary lobe pump and water ring vacuum pump, described atmospheric jet pump is connected with valve six, is provided with vacuum breaker between described bypass two and water ring vacuum pump.
In mechanical pump combined mechanism in above-mentioned a kind of RH a refining unit, between described water ring vacuum pump and exhaust-gas receiver, be provided with a liquid-gas separator.
Compared with prior art, the utility model has the following advantages:
1, the lobe pump in the utility model is a kind of dry pump having certain interval between operational process rotor, and rotary pump with liquid ring runs the mechanical pump had between part compared with wide arc gap, thus to the dust in molten steel Vacuum Degassing Process and moisture insensitive.Between secondary lobe pump and water ring vacuum pump, atmospheric jet pump is set, the additional airflow energy utilizing atmospheric jet pump to apply can slough the content of the lighter gas content such as hydrogen of gaseous mass in molten steel, and improves effective pumping speed of 20 ~ 200Pa scope further; The stuck fault of mechanical pump that during consideration molten steel vacuum outgas, more severe many dirt etc. may occur, adopts the mode of multiple stage one-level lobe pump/multiple stage secondary lobe pump/multiple stage atmospheric jet pump+water ring vacuum pump, makes up in time.
Accompanying drawing explanation
Fig. 1 is the structural representation of this mechanical pump combined mechanism in embodiment.
Fig. 2 is the structural representation of this RH a refining unit in embodiment one.
Fig. 3 is the structural representation of this RH a refining unit in embodiment two.
Fig. 4 is the structural representation of v-shaped tube in embodiment two.
In figure, 1, refining furnace; 2, upcast; 3, downtake; 4, ladle one; 5, ladle two; 6, vacuum chamber; 7, tunger tube; 9, one-level lobe pump; 10, secondary lobe pump; 11, water ring vacuum pump; 12, valve one; 13, inlet manifold; 14, valve three; 15, exhaust-gas receiver; 16, pipe connecting; 17, pressure transmitter; 18, heat exchanger; 19, valve two; 20, atmospheric jet pump; 21, valve six; 22, vacuum breaker; 23, liquid-gas separator; 24, interior pipe; 25, outer tube; 26, ball valve; 27, Zuo Guan; 28, right pipe; 29, v-shaped tube; 30, valve four; 31, surplus valve; 32, valve five.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
Embodiment one:
As shown in Figure 1 and Figure 2, this RH a refining unit comprises refining furnace 1, upcast 2, downtake 3, ladle 1 and ladle 25, vacuum chamber 6 is offered in refining furnace 1, the upper end of upcast 2 is fixed on the bottom of refining furnace 1 and is connected with vacuum chamber 6, and the sidewall of upcast 2 is connected with a tunger tube 7 be connected with this upcast 2, and the lower end of upcast 2 can be dipped in ladle 1, the upper end of downtake 3 is fixed on the bottom of refining furnace 1 and is connected with vacuum chamber 6, and the lower end of downtake 3 can be dipped in ladle 25, RH a refining unit also comprises a mechanical pump combined mechanism, mechanical pump combined mechanism comprises several one-level lobe pumps 9 be in parallel, the secondary lobe pump 10 that several are in parallel and the water ring vacuum pump 11 that several are in parallel, each one-level lobe pump 9 is all in series with valve 1 and is connected with vacuum chamber 6 by an inlet manifold 13, each secondary lobe pump 10 is all in series with valve 3 14 and is connected with one-level lobe pump 9 by pipeline, one end of each water ring vacuum pump 11 is connected with secondary lobe pump 10 by pipeline, the other end of each water ring vacuum pump 11 is then connected with an exhaust-gas receiver 15.
Specifically, inlet manifold 13 is provided with pressure transmitter 17, and mechanical pump combined mechanism also comprises the heat exchanger 18 be connected with secondary lobe pump 10.Mechanical pump combined mechanism also comprises the one-level bypass be in parallel with one-level lobe pump 9, one-level bypass is in series with valve 2 19.Also be provided with the bypass two of being with atmospheric jet pump 20 between secondary lobe pump 10 and water ring vacuum pump 11, atmospheric jet pump 20 is connected with valve 6 21, is provided with vacuum breaker 22 between bypass two and water ring vacuum pump 11.Also be provided with valve 4 30 between secondary lobe pump 10 and exhaust-gas receiver 15, also there is between valve 4 30 and exhaust-gas receiver 15 pipeline be in parallel with bypass two, this pipeline is provided with surplus valve 31.Valve 4 30 and water ring vacuum pump 11 have the path be in parallel with atmospheric jet pump between this, this path are provided with valve 5.A liquid-gas separator 23 is provided with between water ring vacuum pump 11 and exhaust-gas receiver 15.
As shown in Figure 1 and Figure 2, RH a refining unit also comprises pipe connecting 16, and pipe connecting 16 is between ladle 1 and ladle 25 and be connected with ladle 25 with ladle 1 respectively, is provided with the controlling organization that can control liquid flow rate in this pipe connecting 16 in pipe connecting 16.
In the present embodiment, pipe connecting 16 comprises interior pipe 24 and the outer tube 25 of coaxial setting, one end of interior pipe 24 is fixed on the sidewall of ladle 1, and one end of outer tube 25 is fixed on the sidewall of ladle 25, on the other end that the other end of outer tube 25 is sheathed on interior pipe 24 and both can slide by relative telescopic.Controlling organization comprises the ball valve 26 be arranged on interior pipe 24 or outer tube 25, and ball valve 26 can control the opening and closing of interior pipe 24 or outer tube 25.
Embodiment two:
The present embodiment is roughly the same with embodiment one, and difference is, as shown in Figure 3, Figure 4, in the present embodiment, pipe connecting 16 comprises left pipe 27 and right pipe 28, and one end of left pipe 27 is fixed on ladle 1, and one end of right pipe 28 is fixed on ladle 25; Controlling organization comprises a v-shaped tube 29, and the two ends of v-shaped tube 29 are rotationally connected with the other end of left pipe 27 and the other end of right pipe 28 respectively.The outer side wall of left pipe 27 the other end and the outer side wall of right pipe 28 the other end all offer outside screw, the inner side-wall at v-shaped tube 29 two ends all offers the internal thread be threaded with left pipe 27 the other end and right pipe 28 the other end.
Principle of work of the present utility model is as follows: be designed with mechanical pump combined mechanism in the utility model, one-level lobe pump arranges bypass, improve the effective pumping speed of secondary lobe pump when elevated pressures works, the bypass of being with atmospheric jet pump is added between secondary lobe pump and water ring vacuum pump, to the dust produced in molten steel vacuum outgas engineering and moisture insensitive, can guarantee that molten steel vacuum outgas environment runs continuously, liquid steel refining is effective, the technical problem of contaminated solution environment.Its self-starting process is as follows: valve four is (when pressure reaches certain value P
1time, automatically start water ring vacuum pump, valve one, valve five are opened automatically, automatic frequency-conversion startup one-level lobe pump → reach pressure P
2time automatic-closing valve two, when pressure reaches certain value P
3time, valve six is opened automatically, and valve five is closed automatically, and atmospheric jet pump starts to work together → automatically started.Lobe pump in the utility model is a kind of dry pump having certain interval between operational process rotor, and rotary pump with liquid ring runs the mechanical pump had between part compared with wide arc gap, thus to the dust in molten steel Vacuum Degassing Process and moisture insensitive.Between secondary lobe pump and water ring vacuum pump, atmospheric jet pump is set, the additional airflow energy utilizing atmospheric jet pump to apply can slough the content of the lighter gas content such as hydrogen of gaseous mass in molten steel, and improves effective pumping speed of 20 ~ 200Pa scope further; The stuck fault of mechanical pump that during consideration molten steel vacuum outgas, more severe many dirt etc. may occur, adopts the mode of multiple stage one-level lobe pump/multiple stage secondary lobe pump/multiple stage atmospheric jet pump+water ring vacuum pump, makes up in time.
In addition, the utility model can according to actual needs, selects molten steel to be the refining that repeatedly circulates, or only carry out initial refining, and when operating, and the opening and closing that only need carry out control linkage pipe by controlling organization can realize.When controlling organization is ball valve, only ball valve need be operated, when controlling organization is v-shaped tube, then by rotating v-shaped tube, when the cusp of v-shaped tube is at the highest notch, then ladle one is not easily communicated with the molten steel in ladle two, and when v-shaped tube is in horizontality, then ladle one is easily communicated with the molten steel in ladle two.In sum, visual particular case selects refining route, improves refining yield, avoid energy dissipation, and versatility is good.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Claims (5)
1. the mechanical pump combined mechanism in RH a refining unit, described RH a refining unit comprises refining furnace (1), upcast (2), downtake (3), ladle one (4) and ladle two (5), vacuum chamber (6) is offered in described refining furnace (1), the upper end of described upcast (2) is fixed on the bottom of refining furnace (1) and is connected with described vacuum chamber (6), the sidewall of described upcast (2) is connected with a tunger tube (7) be connected with this upcast (2), and the lower end of described upcast (2) can be dipped in ladle one (4), the upper end of described downtake (3) is fixed on the bottom of refining furnace (1) and is connected with described vacuum chamber (6), and the lower end of described downtake (3) can be dipped in ladle two (5), it is characterized in that, described mechanical pump combined mechanism comprises several one-level lobe pumps (9) be in parallel, the secondary lobe pump (10) that several are in parallel and several water ring vacuum pumps be in parallel (11), each one-level lobe pump (9) is all in series with valve one (12) and is connected with described vacuum chamber (6) by an inlet manifold (13), each secondary lobe pump (10) is all in series with valve three (14) and is connected with one-level lobe pump (9) by pipeline, one end of each water ring vacuum pump (11) is connected with secondary lobe pump (10) by pipeline, the other end of each water ring vacuum pump (11) is then connected with an exhaust-gas receiver (15).
2. the mechanical pump combined mechanism in a kind of RH a refining unit according to claim 1, it is characterized in that, described inlet manifold (13) is provided with pressure transmitter (17), and described mechanical pump combined mechanism also comprises the heat exchanger (18) be connected with described secondary lobe pump (10).
3. the mechanical pump combined mechanism in a kind of RH a refining unit according to claim 2, it is characterized in that, described mechanical pump combined mechanism also comprises the one-level bypass be in parallel with described one-level lobe pump (9), described one-level bypass is in series with valve two (19).
4. the mechanical pump combined mechanism in a kind of RH a refining unit according to claim 3, it is characterized in that, the bypass two of being with atmospheric jet pump (20) is also provided with between described secondary lobe pump (10) and water ring vacuum pump (11), described atmospheric jet pump (20) is connected with valve six (21), is provided with vacuum breaker (22) between described bypass two and water ring vacuum pump (11).
5. the mechanical pump combined mechanism in a kind of RH a refining unit according to claim 4, is characterized in that, be provided with a liquid-gas separator (23) between described water ring vacuum pump (11) and exhaust-gas receiver (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520019068.4U CN204401047U (en) | 2015-01-12 | 2015-01-12 | Mechanical pump combined mechanism in a kind of RH a refining unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520019068.4U CN204401047U (en) | 2015-01-12 | 2015-01-12 | Mechanical pump combined mechanism in a kind of RH a refining unit |
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| CN204401047U true CN204401047U (en) | 2015-06-17 |
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| CN201520019068.4U Expired - Fee Related CN204401047U (en) | 2015-01-12 | 2015-01-12 | Mechanical pump combined mechanism in a kind of RH a refining unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946856A (en) * | 2015-07-20 | 2015-09-30 | 中国重型机械研究院股份公司 | Multi-stage water vapor injecting pump arrangement mode |
| ITUB20152949A1 (en) * | 2015-08-06 | 2017-02-06 | Sms Meer Spa | SYSTEM AND VACUUM DEGASAGE METHOD OF LIQUID STEEL |
| CN109402329A (en) * | 2018-11-01 | 2019-03-01 | 上海伊莱茨真空技术有限公司 | A kind of vacuum system applied in steel industry molten steel vacuum degassing process |
-
2015
- 2015-01-12 CN CN201520019068.4U patent/CN204401047U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104946856A (en) * | 2015-07-20 | 2015-09-30 | 中国重型机械研究院股份公司 | Multi-stage water vapor injecting pump arrangement mode |
| CN104946856B (en) * | 2015-07-20 | 2017-01-04 | 中国重型机械研究院股份公司 | A kind of layout pattern of multi-level water steam jet pump |
| ITUB20152949A1 (en) * | 2015-08-06 | 2017-02-06 | Sms Meer Spa | SYSTEM AND VACUUM DEGASAGE METHOD OF LIQUID STEEL |
| WO2017021895A1 (en) * | 2015-08-06 | 2017-02-09 | Sms Meer S.P.A. | Plant and method for vacuum degassing liquid steel |
| CN109402329A (en) * | 2018-11-01 | 2019-03-01 | 上海伊莱茨真空技术有限公司 | A kind of vacuum system applied in steel industry molten steel vacuum degassing process |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20160112 |