CN210367770U - RH stove vacuum pipe device - Google Patents
RH stove vacuum pipe device Download PDFInfo
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- CN210367770U CN210367770U CN201920939767.9U CN201920939767U CN210367770U CN 210367770 U CN210367770 U CN 210367770U CN 201920939767 U CN201920939767 U CN 201920939767U CN 210367770 U CN210367770 U CN 210367770U
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Abstract
The utility model discloses a RH stove vacuum pipe device, through setting up the bypass pipe in hydraulic pressure vacuum main valve both sides, set up logical manual valve and bypass motorised valve on the bypass pipe, the manual valve of bypass keeps the full open mode when RH stove evacuation production, bypass motorised valve opens during the evacuation, thinner bypass pipeline makes the pressure of hydraulic pressure vacuum main valve both sides slowly reach dynamic balance, avoid producing the disturbance to the molten steel face, thereby reduce the phenomenon of freezing steel on the resistant material erosion of vacuum tank and the vacuum tank. When the pressure on the two sides of the hydraulic vacuum main valve reaches dynamic balance, the bypass electric valve is closed, and the hydraulic vacuum main valve is opened, so that the vacuum operation production can be realized. When the bypass electric valve is not well sealed, the bypass manual valve can be manually opened and closed, and the smooth production is ensured.
Description
Technical Field
The utility model relates to a RH stove equipment, concretely relates to RH stove vacuum line device.
Background
The purpose of vacuumizing the molten steel in the RH furnace is to remove hydrogen, oxygen and impurities in the molten steel and improve the purity of the molten steel. The original RH furnace vacuum pipeline is vacuumized through a mechanical pump, a pipeline on one side of a hydraulic vacuum main valve is connected with the mechanical pump and is in a vacuum state, and the other side of the hydraulic vacuum main valve is connected with a molten steel side of a steel ladle and is in an atmospheric pressure state. When the steel ladle molten steel is vacuumized, the hydraulic vacuum main valve is opened, the air pressures on two sides quickly reach dynamic pressure balance, the molten steel in the steel ladle reacts violently, so that the corrosion of the refractory material of the vacuum groove is serious, and the steel is easy to be cooled on the vacuum groove.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome the defects of the prior art, the utility model provides a RH stove vacuum pipeline device, which can reduce the reaction strength of molten steel in a ladle in a vacuum groove.
The technical scheme is as follows: a RH stove vacuum pipe device, be responsible for and hydraulic pressure vacuum main valve including the vacuum, hydraulic pressure vacuum main valve sets up on the vacuum is responsible for, still includes bypass pipe, the manual valve of bypass and bypass motorised valve, the pipe diameter of bypass pipe is less than the pipe diameter that the vacuum was responsible for, the both ends of bypass pipe connect respectively in the vacuum of hydraulic pressure vacuum main valve both sides is responsible for on, the manual valve of bypass with the bypass motorised valve all sets up on this bypass pipe.
Wherein the pipe diameter of the bypass pipe is 1/6 of the pipe diameter of the vacuum main pipe.
Specifically, the bypass pipe is provided with a horizontal section and two vertical sections, the horizontal section is parallel to the vacuum main pipe, and the two vertical sections are respectively arranged at two ends of the horizontal section and vertically connected to the vacuum main pipe.
The vacuum pipeline device also comprises a bypass electric regulating valve, and the bypass electric regulating valve and the bypass electric valve are both arranged on the horizontal section.
Furthermore, the number of the bypass manual valves is two, and the bypass manual valves are respectively arranged on the two vertical sections.
Has the advantages that: this RH stove vacuum pipeline device sets up logical hand valve and bypass motorised valve through setting up the bypass pipe in hydraulic vacuum main valve both sides, sets up logical hand valve and bypass motorised valve on the bypass pipe, and the manual valve of bypass keeps full open state when RH stove evacuation production, and the electronic valve of bypass opens during the evacuation, and thinner bypass pipeline makes the pressure of hydraulic vacuum main valve both sides slowly reach dynamic balance, avoids producing the disturbance to the molten steel level to reduce the phenomenon of vacuum tank resistant material erosion and the last chill steel of vacuum tank. When the pressure on the two sides of the hydraulic vacuum main valve reaches dynamic balance, the bypass electric valve is closed, and the hydraulic vacuum main valve is opened, so that the vacuum operation production can be realized. When the bypass electric valve is not well sealed, the bypass manual valve can be manually opened and closed, and the smooth production is ensured. The vacuum pipeline device is simple in structure and convenient to maintain.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the vacuum pipeline device of the RH furnace comprises a vacuum main pipe 1 of DN1200 and a hydraulic vacuum main valve 2 arranged on the vacuum main pipe 1.
In order to avoid the disturbance to the molten steel caused by overlarge differential pressure due to the direct opening of the hydraulic vacuum main valve 2 during vacuum pumping, the vacuum pipeline device is also provided with a bypass pipe 3 of DN 200. Two ends of the by-pass pipe 3 are respectively connected to vacuum main pipes on two sides of the hydraulic vacuum main valve 2, the pipe diameter of the by-pass pipe 3 is 1/6 of the pipe diameter of the vacuum main pipe 1, and the by-pass pipe 3 is opened firstly during vacuum pumping operation to cause small disturbance to molten steel.
Specifically, the bypass pipe 3 has a horizontal section 31 and two vertical sections 32, the horizontal section 31 is parallel to the main vacuum pipe 1, and the two vertical sections 32 are respectively disposed at two ends of the horizontal section 31 and vertically connected to the main vacuum pipe 1.
Two bypass manual valves 4 are respectively arranged on the two vertical sections 32, and a bypass electric valve 5 and a bypass electric regulating valve 6 are both arranged on the horizontal section 31.
When the RH furnace is vacuumized, the two bypass manual valves 4 are kept in a fully-opened state, the bypass electric valve 5 is opened during vacuumization, the size of air flow of the bypass pipe 3 can be adjusted through the bypass electric adjusting valve 6, the pressure on two sides of the hydraulic vacuum main valve 2 slowly reaches dynamic balance through a thinner bypass pipeline, disturbance on the molten steel surface is avoided, and therefore the phenomena of corrosion resistance of a vacuum groove and steel freezing on the vacuum groove are reduced. When the pressure on the two sides of the hydraulic vacuum main valve 2 reaches dynamic balance, the bypass electric valve 5 is closed, and the hydraulic vacuum main valve 2 is opened, so that the vacuum operation production can be realized. When the bypass electric valve 5 is not well sealed, the bypass manual valve 4 can be manually opened and closed, and the smooth production is ensured.
Claims (6)
1. The utility model provides a RH stove vacuum pipe device, includes vacuum main pipe (1) and hydraulic vacuum main valve (2), hydraulic vacuum main valve (2) set up on vacuum main pipe (1), its characterized in that still includes bypass pipe (3), manual valve of bypass (4) and bypass motorised valve (5), the pipe diameter of bypass pipe (3) is less than the pipe diameter of vacuum main pipe (1), the both ends of bypass pipe (3) are connected respectively on vacuum main pipe (1) of hydraulic vacuum main valve (2) both sides, manual valve of bypass (4) with bypass motorised valve (5) all set up on this bypass pipe (3).
2. The RH furnace vacuum line device according to claim 1, wherein the pipe diameter of the bypass pipe (3) is 1/6 of the pipe diameter of the vacuum main pipe (1).
3. The RH furnace vacuum line arrangement according to claim 1, wherein the bypass pipe (3) has a horizontal section (31) and two vertical sections (32), the horizontal section (31) is parallel to the main vacuum pipe (1), and the two vertical sections (32) are respectively disposed at both ends of the horizontal section (31) and vertically connected to the main vacuum pipe (1).
4. The RH furnace vacuum line device according to claim 3, further comprising a bypass electric control valve (6), wherein the bypass electric control valve (6) and the bypass electric valve (5) are disposed on the horizontal section (31).
5. The RH furnace vacuum line arrangement according to claim 4, wherein there are two bypass manual valves (4) respectively provided on the two vertical sections (32).
6. RH furnace vacuum line arrangement according to any of claims 1-5, characterized in that the bypass line (3) is a DN200 line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920939767.9U CN210367770U (en) | 2019-06-20 | 2019-06-20 | RH stove vacuum pipe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920939767.9U CN210367770U (en) | 2019-06-20 | 2019-06-20 | RH stove vacuum pipe device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210367770U true CN210367770U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920939767.9U Active CN210367770U (en) | 2019-06-20 | 2019-06-20 | RH stove vacuum pipe device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210367770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609044A (en) * | 2020-12-11 | 2021-04-06 | 北京首钢股份有限公司 | RH pre-vacuumizing device and method |
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2019
- 2019-06-20 CN CN201920939767.9U patent/CN210367770U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609044A (en) * | 2020-12-11 | 2021-04-06 | 北京首钢股份有限公司 | RH pre-vacuumizing device and method |
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