CN210166476U - Tool for rapidly and reliably detecting water-cooled cable of electric arc furnace - Google Patents
Tool for rapidly and reliably detecting water-cooled cable of electric arc furnace Download PDFInfo
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- CN210166476U CN210166476U CN201920281766.XU CN201920281766U CN210166476U CN 210166476 U CN210166476 U CN 210166476U CN 201920281766 U CN201920281766 U CN 201920281766U CN 210166476 U CN210166476 U CN 210166476U
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- cooled cable
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Abstract
The utility model relates to a quick reliable instrument that detects electric arc furnace water-cooled cable belongs to electric arc furnace smelting technical field. The detection unit comprises a Roots coil, a signal transmitter, an ammeter and a 24V power supply, wherein the Roots coil is sleeved on the water-cooled cable and used for collecting current data flowing through the water-cooled cable and outputting voltage signals, the 24V power supply is connected with a power supply end of the signal transmitter and used for supplying power to the signal transmitter, one end of the signal transmitter is connected with the Roots coil through the signal cable and used for converting the voltage signals into the current signals, and the other end of the signal transmitter is connected with the ammeter and used for displaying the current data in real time. This application is opened roots's coil and is overlapped on water-cooled cable, through detecting water-cooled cable heavy current, whether quick judgement cable has the trouble, reduces water-cooled cable detection achievement that rolls off the production line, has reduced the cost of overhaul, saves maintenance time.
Description
Technical Field
The utility model relates to a quick reliable instrument that detects electric arc furnace water-cooled cable belongs to electric arc furnace smelting technical field.
Background
The electric arc furnace for steelmaking generally supplies power for a three-phase transformer, the current on the low-voltage side of the 50t electric arc furnace transformer reaches 3 ten thousand amperes according to the size of the electric arc furnace, the current is output to a busbar through each phase short net of the transformer, the busbar is connected with a conductive cross arm through two or more parallel water-cooling cables, the conductive cross arm clamps an electrode, the current is led into the furnace and generates electric arcs with melted materials, and the furnace materials are directly heated by the electric arcs to be melted.
Wherein, when any one of the short net, the water-cooled cable, the conductive cross arm and the electrode goes wrong, the smelting power consumption is higher, the smelting period is increased, and the cost control is very unfavorable. Particularly, the water-cooled cable moves up and down along with the conductive cross arm, and the wire breakage phenomenon occurs inside the cable in the long-term movement process, so that the power supply efficiency is influenced.
At present, the current is monitored through a mutual inductor arranged in a transformer, the current flowing through each cable cannot be monitored when a plurality of water-cooled cables run in parallel, the water-cooled cables often move along with a furnace body, and the fixed current mutual inductor is inconvenient to install to measure singly, as shown in a graph (1), when the water-cooled cables are broken, more broken wires and larger resistance values are obtained, the electric power consumption of electric arc furnace smelting is reflected to be higher in the aspect of production, the water-cooled cables cannot be judged to be broken in time in the aspect of equipment, the water-cooled cables need to be stopped to be disassembled to detect direct current resistance, and the water-cooled cables can be determined to be replaced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an instrument that detects electric arc furnace water-cooled cable is reliably provided fast to above-mentioned prior art, not only simple structure, it is convenient to detect, moreover can be quick accurate detect out the water-cooled cable that breaks down.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a quick reliable instrument that detects electric arc furnace water-cooled cable, includes a plurality of detecting element, the detecting element overlaps respectively on the water-cooled cable, the detecting element includes roots's coil, signal transmitter, ampere meter and 24V power, roots's coil overlaps on the water-cooled cable for gather the current data that the water-cooled cable passed and output voltage signal, 24V power is connected with signal transmitter power end, supplies power in signal transmitter, signal transmitter one end is connected with roots's coil through signal cable for turn into current signal with voltage signal, the signal transmitter other end is connected with the ampere meter for show current data in real time.
The number of the detection units is matched with the number of the water-cooling cables of a certain phase in the three-phase transformer.
Compared with the prior art, the utility model has the advantages of: the utility model provides a quick reliable instrument that detects electric arc furnace water-cooled cable, opens roots's coil and overlaps on water-cooled cable, through detecting the water-cooled cable heavy current, whether quick judgement cable has the trouble, has reduced water-cooled cable detection achievement that rolls off the production line, in time resumes to smelt the power consumption, has reduced the cost of overhaul, saves repair time, reduces down time.
Drawings
FIG. 1 is a schematic diagram of a three-phase transformer power supply for an electric arc furnace;
FIG. 2 is a schematic diagram of a tool for rapidly and reliably detecting a water-cooled cable of an electric arc furnace according to an embodiment of the present invention;
in the figure, 1, an electric arc furnace is provided with a three-phase transformer, a 2 short net, a 3 bus bar, a 4 water-cooled cable, a 5 conductive cross arm, a 6 built-in mutual inductor, a 7 Roots coil, an 8 signal cable, a 9 signal transmitter, a 10 ammeter and a 1124V power supply.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 2, the tool for rapidly and reliably detecting the water-cooled cable of the arc furnace in the embodiment includes a plurality of detecting units, the number of the detecting units matches with the number of the water-cooled cables 4 of one phase of the three-phase transformer 1 for the arc furnace, and the detecting units are respectively sleeved on the water-cooled cables 4. The detection unit comprises a Roots coil 7, a signal transmitter 9, an ammeter 10 and a 24V power supply 11, wherein the 24V power supply 11 is connected with a power supply end of the signal transmitter 9 and supplies power to the signal transmitter 9; 9 one end of signal transmitter is connected with roots's coil 7 through signal cable 8, and after 9 signal transmitters got the electricity, roots's coil 7 got the electricity promptly to with 7 covers of roots's coil on water-cooled cable 4, the 9 other end of signal transmitter is connected with ampere meter 10 for show current data in real time.
As shown in figure 1, a low-voltage outlet of a three-phase transformer 1 for the electric arc furnace is sequentially connected with a short net 2, a bus bar 3, a water-cooled cable 4 and a conductive cross arm 5. Each phase of the three-phase transformer 1 for the electric arc furnace is respectively provided with 2 water-cooled cables 4. When this was detected, 2 detection units were prepared. The Roots coils 7 are opened and sleeved on the water-cooled cables 4 respectively, the 24V power supply 11 supplies power to the signal transmitter 9, and the signal transmitter 9 supplies power to the Roots coils 7. After the three-phase transformer 1 for the electric arc furnace starts to supply power, current flows from the three-phase transformer 1 for the electric arc furnace to the electrode through the short net 2, the busbar 3, the water-cooled cable 4 and the conductive cross arm 5 to supply power in the furnace, when the current passes through the water-cooled cable 4, the Roots coil 7 collects current data flowing through the water-cooled cable 4 and outputs 0-5V voltage signals through an integrator built in the Roots coil 7, the 0-5V voltage signals are transmitted to the signal transmitter 9 through the signal cable 8, the signal transmitter 9 converts the 0-5V voltage signals into 4-20 mA signals to be transmitted to the ammeter 10, and the ammeter 10 displays the current data in real time.
When the more resistance of the broken wire of water-cooled cable 4 is big on the left, every water-cooled cable 4 of seeing that can be clear passes through the size of electric current on ampere meter 10, the electric current value that two parallelly connected water-cooled cables 4 of detection that can be effective quick pass through, through the electric current of comparing two water-cooled cables 4, discovers trouble water-cooled cable 4 fast, has reduced maintenance time. The flexible Roots coil 7 is convenient to install, and current can be detected only by sleeving the flexible Roots coil on the water-cooling cable 4 to be detected; the Roots coil 7 has high measurement accuracy, the output voltage is in direct proportion to the differential of the measured current, and the output voltage in direct proportion to the primary current can be obtained by only outputting the output voltage through an integrator. Therefore, the detection can be completed by selecting the flexible Roots coil 7 with a proper measuring range and matching with the corresponding signal transmitter 9 and the ammeter 10.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (2)
1. The utility model provides a quick reliable instrument that detects electric arc furnace water-cooled cable which characterized in that: the detection unit is sleeved on the water-cooled cable (4) respectively and comprises a plurality of detection units, each detection unit comprises a Roots coil (7), a signal transmitter (9), an ammeter (10) and a 24V power supply (11), the Roots coil (7) is sleeved on the water-cooled cable (4) and used for collecting current data flowing through the water-cooled cable (4) and outputting voltage signals, the 24V power supply (11) is connected with a power supply end of the signal transmitter (9) and supplies power to the signal transmitter (9), one end of the signal transmitter (9) is connected with the Roots coil (7) through a signal cable (8) and used for converting the voltage signals into the current signals, and the other end of the signal transmitter (9) is connected with the ammeter (10) and used for displaying the current data in real time.
2. The tool for rapidly and reliably detecting the water-cooled cable of the electric arc furnace as claimed in claim 1, wherein: the number of the detection units is matched with the number of the water-cooling cables (4) of a certain phase in the three-phase transformer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920281766.XU CN210166476U (en) | 2019-03-06 | 2019-03-06 | Tool for rapidly and reliably detecting water-cooled cable of electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920281766.XU CN210166476U (en) | 2019-03-06 | 2019-03-06 | Tool for rapidly and reliably detecting water-cooled cable of electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210166476U true CN210166476U (en) | 2020-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920281766.XU Active CN210166476U (en) | 2019-03-06 | 2019-03-06 | Tool for rapidly and reliably detecting water-cooled cable of electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210166476U (en) |
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2019
- 2019-03-06 CN CN201920281766.XU patent/CN210166476U/en active Active
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