CN202648456U - Automatic water cutoff protection system of electric induction furnace - Google Patents
Automatic water cutoff protection system of electric induction furnace Download PDFInfo
- Publication number
- CN202648456U CN202648456U CN 201220292051 CN201220292051U CN202648456U CN 202648456 U CN202648456 U CN 202648456U CN 201220292051 CN201220292051 CN 201220292051 CN 201220292051 U CN201220292051 U CN 201220292051U CN 202648456 U CN202648456 U CN 202648456U
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- Prior art keywords
- inversion
- loop
- switch
- relay
- inverter
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- Expired - Fee Related
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Abstract
The utility model discloses an automatic water cutoff protection system of an electric induction furnace. An inverter starting circuit, an inverter disconnect circuit and a water cutoff control circuit are sequentially connected in parallel and comprised by the automatic water cutoff protection system of the electric induction furnace. A water pressure induction switch (6), an inverter stop switch (5), a first relay switch (4) and a relay controller(3) which controls the on-off of the first relay switch (4) are sequentially connected in parallel and comprised by the inverter starting circuit. An inverter circuit automatic protection switch (1) is in series connection on the inverter disconnect circuit. An inverter starting button (2) is in bridge joint between the inverter starting circuit and the inverter disconnect circuit and controls the on-off of the inverter starting circuit and the inverter disconnect circuit. A second relay switch controlled by the relay controller (3) and normally closed contacts (7,8) are sequentially connected on the water cutoff control circuit. A change-over switch (11) and an electrically operated valve (14) are in parallel connection on the normally closed contacts. The automatic water cutoff protection system of the electric induction furnace timely cuts off water supply and water return of a system when the furnace is worn out.
Description
Technical field
The utility model relates to the automatic shutoff protection system, relates in particular to the automatic shutoff protection system for electric induction furnace.
Background technology
At present, what the electric induction furnace melting was adopted all is water-cooled induction coil, and during induction coil energising work, the inner water flowing of induction coil is cooled off induction coil.The induction coil Inlet and outlet water generally all is to adopt common gate valve, ball lock, butterfly valve etc. that flow of inlet water is controlled.When high-temperature liquid metal touches the induction coil copper pipe by the furnace lining slit, induction coil discharge or corrode induction coil copper pipe are caused hole (wearing stove), there is the cooling water of pressure to enter in the stove in the induction coil, under the high-temperature liquid metal effect, produce vaporization, be accompanied with the molten metal generation during effusion and splash, the personnel that very easily cause scald and device damage.
The utility model content
The technical problems to be solved in the utility model is lasting the entering in the stove of cooling water that pressure is arranged when wearing the stove accident; under the high-temperature liquid metal effect, produce vaporization; being accompanied with the molten metal generation during effusion splashes; the personnel that very easily cause scald and device damage; provide a kind of electric control valve controlled by electric induction furnace autoprotection system for this reason; the electric induction furnace protection system is moved and is automatically cut off the automatic shutoff protection system of simultaneously automatically controlled (pneumatic) valve event cutting system water supply and backwater to the body of heater power supply when wearing the stove accident.
The technical solution of the utility model is: a kind of automatic shutoff protection system for electric induction furnace; it comprises that inversion in parallel successively starts the loop; inversion cutoff circuit and the control loop of cutting off the water supply; described inversion starts the loop and comprises the successively water pressure sensing switch of series connection; the inversion shutdown switch; the relay-operated controller that the first relay switch and control the first relay switch open and close; be serially connected with the inverter circuit Automatic Protection Switching on the described inversion cutoff circuit; inversion starts the inversion start button that cross-over connection has control inversion startup loop and inversion cutoff circuit to open and close between loop and the inversion cutoff circuit; be connected with the second relay switch and the normally closed interlock that are subjected to relay-operated controller control on the described control loop of cutting off the water supply in turn, described normally closed interlock is in series with change-over switch and electrically operated valve.
The improvement of this programme is to be parallel with inversion stop alarm loop on the described inversion startup loop, and described inversion stop alarm loop comprises the 3rd relay switch and the inversion stop alarm device that are subjected to relay-operated controller control of successively series connection.
The further improvement of this programme is to be parallel with inversion work indication loop on the described inversion startup loop, and described inversion work indication loop comprises the 4th relay switch and the inversion work alarm that are subjected to relay-operated controller control of successively series connection.
Further improving again of this programme is to be parallel with the overtemperature alarm loop on the described inversion startup loop, and described overtemperature alarm loop comprises water temperature inductive switch and the overtemperature alarm of successively series connection.
The beneficial effects of the utility model are can automatically cut off to body of heater when wearing the stove accident and power by the setting control loop of cutting off the water supply, automatically controlled (pneumatic) valve event cutting system supplies water and backwater simultaneously, avoid lasting the entering in the stove of cooling water of pressure, alleviate and wear the earthquake intensity that the stove accident produces.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Fig. 2 is normally closed interlock and electrically operated valve connection diagram among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Such as Fig. 1; shown in Figure 2; a kind of automatic shutoff protection system for electric induction furnace; it comprises that inversion in parallel successively starts the loop; inversion cutoff circuit and the control loop of cutting off the water supply; described inversion starts the loop and comprises the successively water pressure sensing switch 6 of series connection; inversion shutdown switch 5; the relay-operated controller 3 that the first relay switch 4 and control the first relay switch 4 open and close; be serially connected with inverter circuit Automatic Protection Switching 1 on the described inversion cutoff circuit; inversion starts the inversion start button 2 that cross-over connection has control inversion startup loop and inversion cutoff circuit to open and close between loop and the inversion cutoff circuit; be connected with the second relay switch and the normally closed interlock 7 that are subjected to relay-operated controller 3 controls on the described control loop of cutting off the water supply in turn; 8; described normally closed interlock 7,8 is in series with change-over switch 11 and electrically operated valve 14.
A normally closed interlock 7,8 of electrically operated valve control power supply access electric induction furnace inverter circuit contactor, during electric induction furnace work, during the inversion starting, inverter circuit normally closed interlock 7,8 often becomes to be opened, and electrically operated valve 14 is for often opening (reversing switch 11 disconnects).After the electric induction furnace normal operation, change-over switch 11 again closes; When inverter circuit Automatic Protection Switching Q moved, the second relay switch power-failure close, normally open contact became when normally closed, and electrically operated valve 14 is started working, and cutting system supplies water and backwater.
The utility model is like this work: press inversion start button 2; sense hydraulic pressure in the induction coil when water pressure sensing switch 6 and be in closure state when normal; inversion shutdown switch 5 also is in normally off; at this moment inversion starts the loop and connects; relay-operated controller 3 transmits the signal of telecommunication for the first relay switch 4; the first relay switch 4 closures; rear inversion start button 2 pop into position of loosing one's grip; the electric induction furnace normal operation; second relay switch of cutting off the water supply on the control loop is in off-state; motor-driven valve is not worked; inverter circuit Automatic Protection Switching Q work when the induction coil of electric induction furnace is worn the stove accident makes relay-operated controller 3 outages, and the first relay switch 4 dead electricity disconnect; originally the second relay switch that disconnects is closed, and at this moment electrically operated valve is connected and started working.Water pressure sensing switch 6 automatic disconnections when hydraulic pressure is unusual, inversion start the loop and also disconnect, and in case of emergency also can manually press inversion shutdown switch 5 and make it to disconnect, and start the loop thereby disconnect inversion.
Preference of the present utility model is to be parallel with inversion stop alarm loop on the described inversion startup loop, and described inversion stop alarm loop comprises the 3rd relay switch and the inversion stop alarm device 13 that are subjected to relay-operated controller 3 controls of successively series connection.The 3rd relay switch is in off-state during the electric induction furnace normal operation, and inversion stop alarm device 13 is not worked.When wearing the disconnection of stove accident inversion startup loop, the 3rd relay switch dead electricity is closed, and inversion stop alarm device 13 is connected and begun to report to the police.
The utility model can also start the loop in inversion and be parallel with inversion work indication loop, and described inversion work indication loop comprises the 4th relay switch and the inversion work alarm 9 that are subjected to relay-operated controller 3 controls of successively series connection.The 4th relay switch is in closure state when electric induction furnace works, and inversion work alarm 9 is connected and reported to the police, and the 4th relay electric-loss disconnects when wearing the stove accident, inversion work alarm 9 stop alarms.
Another preference of the present utility model is to be parallel with the overtemperature alarm loop on the described inversion startup loop, and described overtemperature alarm loop comprises water temperature inductive switch 10 and the overtemperature alarm 12 of successively series connection.Water temperature inductive switch 10 disconnects when the water temperature in the induction coil of electric induction furnace is in normal level, and overtemperature alarm 12 is not worked, water temperature inductive switch 10 closures when the water temperature in the induction coil exceeds normal value, and overtemperature alarm 12 begins to report to the police.
Above-mentioned inversion stop alarm device 13, inversion work alarm 9, overtemperature alarm 12 can be alarm lamp, alarm sound or other any known sound and light alarm equipment.
Claims (4)
1. automatic shutoff protection system that is used for electric induction furnace; it is characterized in that it comprises that inversion in parallel successively starts the loop; inversion cutoff circuit and the control loop of cutting off the water supply; described inversion starts the loop and comprises the successively water pressure sensing switch (6) of series connection; inversion shutdown switch (5); the relay-operated controller (3) that the first relay switch (4) and control the first relay switch (4) open and close; be serially connected with inverter circuit Automatic Protection Switching (1) on the described inversion cutoff circuit; inversion starts the inversion start button (2) that cross-over connection has control inversion startup loop and inversion cutoff circuit to open and close between loop and the inversion cutoff circuit; be connected with the second relay switch and the normally closed interlock (7 that are subjected to relay-operated controller (3) control on the described control loop of cutting off the water supply in turn; 8); described normally closed interlock (7,8) is in series with change-over switch (11) and electrically operated valve (14).
2. a kind of automatic shutoff protection system for electric induction furnace as claimed in claim 1; it is characterized in that being parallel with inversion stop alarm loop on the described inversion startup loop, described inversion stop alarm loop comprises the 3rd relay switch and the inversion stop alarm device (13) that are subjected to relay-operated controller (3) control of successively series connection.
3. a kind of automatic shutoff protection system for electric induction furnace as claimed in claim 1; it is characterized in that being parallel with inversion work indication loop on the described inversion startup loop, described inversion work indication loop comprises the 4th relay switch and the inversion work alarm (9) that are subjected to relay-operated controller (3) control of successively series connection.
4. a kind of automatic shutoff protection system for electric induction furnace as claimed in claim 1; it is characterized in that being parallel with the overtemperature alarm loop on the described inversion startup loop, described overtemperature alarm loop comprises water temperature inductive switch (10) and the overtemperature alarm (12) of successively series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292051 CN202648456U (en) | 2012-06-21 | 2012-06-21 | Automatic water cutoff protection system of electric induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220292051 CN202648456U (en) | 2012-06-21 | 2012-06-21 | Automatic water cutoff protection system of electric induction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202648456U true CN202648456U (en) | 2013-01-02 |
Family
ID=47417553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220292051 Expired - Fee Related CN202648456U (en) | 2012-06-21 | 2012-06-21 | Automatic water cutoff protection system of electric induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202648456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713112A (en) * | 2013-12-13 | 2015-06-17 | 贵州中烟工业有限责任公司 | Boiler dust removal circular processing system |
-
2012
- 2012-06-21 CN CN 201220292051 patent/CN202648456U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713112A (en) * | 2013-12-13 | 2015-06-17 | 贵州中烟工业有限责任公司 | Boiler dust removal circular processing system |
| CN104713112B (en) * | 2013-12-13 | 2017-01-18 | 贵州中烟工业有限责任公司 | Boiler dust removal circular processing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20130621 |