CN210399983U - Leakage detection protection system of medium-frequency induction furnace - Google Patents
Leakage detection protection system of medium-frequency induction furnace Download PDFInfo
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- CN210399983U CN210399983U CN201921076688.6U CN201921076688U CN210399983U CN 210399983 U CN210399983 U CN 210399983U CN 201921076688 U CN201921076688 U CN 201921076688U CN 210399983 U CN210399983 U CN 210399983U
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- 230000006698 induction Effects 0.000 title claims abstract description 50
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 239000000523 sample Substances 0.000 claims abstract description 32
- 238000010618 wire wrap Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000005684 electric field Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model discloses a leakage detection protection system of a medium frequency induction furnace, which comprises a furnace body of the medium frequency induction furnace, wherein a furnace lining is arranged on the surface of the inner wall of the furnace body, an induction coil is wound outside the furnace body, a grounding probe is embedded on the furnace lining of the bottom surface of the furnace body, and the needle point of the grounding probe extends into the furnace lining on the bottom surface of the furnace body; the bottom surface of the furnace body is provided with a grounding connecting port, a grounding connecting pipe is clamped in the grounding connecting port, the upper part of the grounding connecting pipe is in contact connection with the needle point of the grounding probe, and the lower part of the pipe body extends downwards out of the furnace body and is grounded through a wire; the top coil and the bottom coil of the induction coil are respectively connected with an external power supply, wherein the bottom coil is input into the top coil for output, the bottom coil is simultaneously connected with an electric leakage measuring device, and the electric leakage measuring device is grounded. The utility model discloses a medium frequency induction furnace leak detection protection system can insert the induced-current of the inside metal liquid of furnace body into emperor, can react the furnace wall current state according to the leakage current simultaneously.
Description
Technical Field
The utility model relates to a medium frequency induction furnace leak detection protection system for induction furnace metal smelting field.
Background
When the medium-frequency induction furnace operates, the furnace body is filled with high-temperature molten metal liquid; when the furnace lining becomes thin and damaged, the high-temperature molten metal liquid has the risk of leakage and even penetration, and the safety of equipment and personnel is endangered. In addition, the molten metal at high temperature may generate induced electromotive force under the action of the induced electric field, thereby causing electrification, which may endanger workers who perform operations such as slagging-off on the platform.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a medium frequency induction furnace leak testing protection system, it can eliminate electrified among the metal liquid, can monitor the performance of furnace wall simultaneously.
One technical scheme for achieving the above purpose is as follows: a leakage detection protection system of a medium frequency induction furnace comprises a furnace body of the medium frequency induction furnace, wherein a furnace lining is arranged on the surface of the inner wall of the furnace body, and an induction coil is wound and connected on the outer side of the furnace body;
a grounding probe is embedded in the furnace lining arranged on the bottom surface of the furnace body, the upper surface of the grounding probe is flush with the upper surface of the furnace lining on the bottom surface of the furnace body, and the needle point of the grounding probe extends into the furnace lining on the bottom surface of the furnace body; the bottom surface of the furnace body is provided with a grounding connecting port, a grounding connecting pipe is clamped in the grounding connecting port, the upper part of the grounding connecting pipe is in contact connection with the needle point of the grounding probe, and the lower part of the pipe body extends downwards out of the furnace body and is grounded through a wire;
the top coil and the bottom coil of the induction coil are respectively connected with an external power supply, wherein the bottom coil inputs the output of the top coil, the bottom coil is simultaneously connected with an electric leakage measuring device, and the electric leakage measuring device is grounded.
Furthermore, the electric leakage measuring device is connected with an induction coil power supply of the medium-frequency induction furnace.
Further, the electric leakage measuring device is connected with an alarm device.
Further, the grounding probe is conical.
Furthermore, protective walls are arranged on two sides of the connecting part of the grounding connecting pipe and the grounding probe.
The utility model discloses a leakage detection protection system of a medium frequency induction furnace, which comprises a furnace body of the medium frequency induction furnace, wherein a furnace lining is arranged on the surface of the inner wall of the furnace body, an induction coil is wound outside the furnace body, a grounding probe is embedded on the furnace lining arranged on the bottom surface of the furnace body, and the needle point of the grounding probe extends into the furnace lining on the bottom surface of the furnace body; the bottom surface of the furnace body is provided with a grounding connecting port, a grounding connecting pipe is clamped in the grounding connecting port, the upper part of the grounding connecting pipe is in contact connection with the needle point of the grounding probe, and the lower part of the pipe body extends downwards out of the furnace body and is grounded through a wire; the top coil and the bottom coil of the induction coil are respectively connected with an external power supply, wherein the bottom coil is input into the top coil for output, the bottom coil is simultaneously connected with an electric leakage measuring device, and the electric leakage measuring device is grounded. The utility model discloses a leakage detection protection system of a medium frequency induction furnace, when the molten metal liquid of high temperature produces induced electromotive force under the effect of induction electric field, the induced current can be connected into the ground through the grounding probe to ensure that the metal liquid is uncharged; simultaneously the utility model discloses a leakage current measuring circuit, at induction coil both sides applied voltage, one end ground connection simultaneously, the ground probe of cooperation furnace body bottom, this measuring circuit has formed one and has carried out measuring measurement circuit to the leakage current between the furnace body coil to the metallic liquid, and metallic liquid and furnace body coil include the furnace lining, can react the current state of furnace lining through this leakage current, in case the furnace lining attenuation appears the furnace leakage risk and can in time carry out early warning and shut down the intervention.
Drawings
Fig. 1 is the structure schematic diagram of the leakage detection protection system of the intermediate frequency induction furnace of the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific embodiments with reference to the accompanying drawings:
referring to fig. 1, the leakage detection protection system for an intermediate frequency induction furnace of the present invention includes a furnace body 1 of the intermediate frequency induction furnace, a furnace lining 2 disposed on the inner wall surface of the furnace body, and an induction coil 3 wound around the outside of the furnace body.
A grounding probe 5 is embedded in the furnace lining 2 arranged on the bottom surface of the furnace body 1, the grounding probe 5 is conical, the upper surface of the grounding probe is flush with the upper surface of the furnace lining on the bottom surface of the furnace body, and the tip part of the grounding probe extends into the furnace lining 2 on the bottom surface of the furnace body. Conical structure for after metal melt 6 is full of furnace body 1 and overflows ground probe 5, can be better form electrical contact with ground probe 5, promote the detection performance, the cross-section of slowly narrowing downwards makes peripheral furnace lining can form better protection to ground probe 5, prevents that metal melt from oozing down.
The bottom surface of the furnace body 1 is provided with a grounding connector, a grounding connecting pipe 4 is clamped in the grounding connector, the upper part of the grounding connecting pipe is in contact with the needle point of the grounding probe 5 to form electrical connection, and the lower part of the pipe body extends downwards out of the furnace body and is grounded through a wire. And protective walls are arranged on two sides of the connecting part of the grounding connecting pipe 4 and the grounding probe 5, so that the furnace leakage accident caused by the downward leakage of molten metal is further prevented.
When the molten metal 6 molten at high temperature generates induced electromotive force under the action of the induced electric field generated by the induction coil 3, the induced electromotive force can be connected to the ground through the grounding probe 5 and the grounding connecting pipe 4, so that the metal liquid is ensured to be uncharged.
The top coil and the bottom coil of the induction coil 3 are respectively connected with an external power supply, wherein the bottom coil is input into the top coil for output, the bottom coil is simultaneously connected with an electric leakage measuring device 7, and the electric leakage measuring device 7 is grounded. The measuring circuit forms a leakage current measuring circuit in cooperation with a grounding probe 5 at the bottom of the furnace body, and the leakage current is measured between the molten metal 6 and the induction coil 3 inside the furnace body.
When the measuring system works, a direct current voltage is applied between the molten metal 6 and the induction coil 3, and the leakage current between the molten metal 6 and the induction coil 3 is measured, so that the resistance between the molten metal 6 and the induction coil 3 can be calculated according to the principle that R is U/I. And the furnace lining 2 exists between the molten metal 6 and the induction coil 3, and the resistance can directly reflect the state of the furnace lining 2: the electric resistance is large when the furnace lining 2 is thick, and the electric resistance is small when the furnace lining 2 is thin.
When the leakage current between the molten metal 6 and the induction coil 3 is gradually increased, the resistance between the molten metal 6 and the induction coil 3 is reduced, and the furnace lining becomes thinner, so that early warning of the furnace lining becoming thinner can be realized. When the leakage current increases and exceeds a set safety value, namely the thinning and damage condition of the furnace lining is proved to exceed a safety range, shutdown and furnace lining replacement are required to avoid potential furnace leakage and even furnace penetration risk accidents. The electric leakage measuring device 7 is connected with an induction coil power supply of the medium-frequency induction furnace, and can realize automatic power off in emergency; the electric leakage measuring device 7 is connected with an alarm device, and can realize automatic alarm to engineers in emergency. After the furnace lining is replaced, the medium-frequency induction furnace can continue to work safely and reliably.
The utility model discloses in, the bottom furnace wall that has ground connection probe and ground connection connecting pipe can regard as modular assembly's standard type furnace wall to use, makes up with other furnace walls, installs convenient high-efficient, promotes to production safety effect and is showing.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. The utility model provides a leakage detection protection system of intermediate frequency induction furnace, includes the furnace body of intermediate frequency induction furnace, is equipped with the furnace lining at furnace body inner wall surface, and the wire-wrapping has induction coil, its characterized in that outside the furnace body:
a grounding probe is embedded in the furnace lining arranged on the bottom surface of the furnace body, the upper surface of the grounding probe is flush with the upper surface of the furnace lining on the bottom surface of the furnace body, and the needle point of the grounding probe extends into the furnace lining on the bottom surface of the furnace body; the bottom surface of the furnace body is provided with a grounding connecting port, a grounding connecting pipe is clamped in the grounding connecting port, the upper part of the grounding connecting pipe is in contact connection with the needle point of the grounding probe, and the lower part of the pipe body extends downwards out of the furnace body and is grounded through a wire;
the top coil and the bottom coil of the induction coil are respectively connected with an external power supply, wherein the bottom coil inputs the output of the top coil, the bottom coil is simultaneously connected with an electric leakage measuring device, and the electric leakage measuring device is grounded.
2. The leakage detection and protection system of the intermediate frequency induction furnace according to claim 1, wherein the leakage measuring device is connected with an induction coil power supply of the intermediate frequency induction furnace.
3. The leakage detection and protection system of the intermediate frequency induction furnace according to claim 1, wherein the leakage measuring device is connected with an alarm device.
4. The leakage detection protection system of the intermediate frequency induction furnace according to claim 1, wherein the grounding probe is conical.
5. The leakage detection and protection system of the intermediate frequency induction furnace according to claim 1, wherein protection walls are provided on both sides of a connection portion of the grounding connection pipe and the grounding probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921076688.6U CN210399983U (en) | 2019-07-10 | 2019-07-10 | Leakage detection protection system of medium-frequency induction furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921076688.6U CN210399983U (en) | 2019-07-10 | 2019-07-10 | Leakage detection protection system of medium-frequency induction furnace |
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| CN210399983U true CN210399983U (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
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