CN205620460U - LF stove circuit detecting system - Google Patents
LF stove circuit detecting system Download PDFInfo
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- CN205620460U CN205620460U CN201620460100.7U CN201620460100U CN205620460U CN 205620460 U CN205620460 U CN 205620460U CN 201620460100 U CN201620460100 U CN 201620460100U CN 205620460 U CN205620460 U CN 205620460U
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Abstract
The utility model discloses a LF stove circuit detecting system belongs to ferrous metallurgy control technical field for the solution detects at the arc stream of LF stove and presses detecting system with the arc and since the LF stove add the warm boot frequently and the problem that leads to the fact corresponding parts to burn out, LF stove circuit detecting system, including the furnace body, be equipped with the electrode bar in the furnace body, the electrode bar passes through power cord and power end intercommunication, still includes arc stream detecting system and arc pressure detecting system. The utility model discloses a set up independent 24VDC mains operated respectively to integrator, distributor, [electronic] AC voltage convertor and isolator, can avoid because the warm boot that adds of LF stove frequent and produce great impulse voltage to above -mentioned parts, therefore the condition that can be burnt out its above -mentioned part, and then ensure the normal work of whole LF stove to improve its work efficiency. In addition, still be equipped with RC current circuit in detecting system is pressed to the arc, realize clamping voltage rate of change, can play the guard action to corresponding part.
Description
Technical field
This utility model belongs to Ferrous Metallurgy and controls technical field, particularly relates to a kind of LF stove checking system for PCB.
Background technology
Luo-coil is uniform winding loop coil on nonferromugnetic material, and output signal is the differential of Current versus time,
By the circuit that is integrated of voltage signal to output, it is possible to truly reduce input current.This coil has electric current can
In real time measurement, fast response time, will not saturated, feature almost without phase error, therefore its can be applicable to relay protection, can
The big electric currents such as signal Severe distortion and electric furnace, short-circuit test, thunder and lightning signals collecting such as control silicon rectifier, frequency control, electric resistance welding
Occasion.Just Luo-coil and integrator is used to realize currently for the detection of LF stove (i.e. ladle refining furnace) arc stream；But
It is owing to the heating starting of LF stove is frequent, easily produces greater impact voltage, thus easily cause amassing in arc stream detecting system
Divide burning out of the parts such as device, cause cannot be carried out effectively detecting arc stream, and then cause LF stove normally to work, affect work
Make efficiency.In like manner, in the system that LF stove arc voltage is detected, also due to the heating starting of LF stove frequently causes accordingly
The parts such as AC converter burn out, and ultimately result in LF stove and cannot normally work, affect work efficiency.
Utility model content
This utility model solves the technical problem that and is to provide a kind of LF stove checking system for PCB, examines in order to the arc stream solved at LF stove
Survey and in arc voltage detecting system, the problem frequently causing corresponding parts to burn out due to the heating starting of LF stove, thus can keep away
Exempt from the situation causing LF stove normally to work, the efficiency of LF stove can be improved.
This utility model solves its technical problem the technical scheme is that LF stove checking system for PCB, including body of heater, body of heater
By wired earth, being provided with electrode bar in body of heater, electrode bar is connected with power end by power line, also includes that arc stream detection is
System and arc voltage detecting system, described arc stream detecting system includes Luo-coil, integrator, distributor and arc stream PLC control system,
Described Luo-coil overlaps on the power line, and after the most integrated device of Luo-coil and distributor with arc stream PLC control system even
Connecing, described integrator and distributor are powered by independent 24VDC power supply respectively；Described arc voltage detecting system include the first resistance,
Voltmeter, RC series circuit, isolating transformer, AC converter, isolator and arc voltage PLC control system, first
One end of resistance is connected with power line, and its other end is connected with one end of voltmeter, the other end ground connection of voltmeter；Described RC
Series circuit is in parallel with voltmeter, and the side of described isolating transformer is in parallel with voltmeter, the opposite side of isolating transformer warp successively
Be connected with arc voltage PLC control system after AC converter and isolator, described AC converter and isolator respectively by
Independent 24VDC power supply is powered.
Further: arc stream PLC control system and arc voltage PLC control system are same PLC control system.
Further: described power line has three, every power line be correspondingly provided with a Luo-coil, integrator, one
Individual distributor, the first resistance, voltmeter, RC series circuit, isolating transformer, an alternating current
It is independently-powered that buckling parallel operation, an isolator and four are respectively integrator, distributor, AC converter and isolator
24VDC power supply.
Further: arc stream PLC control system and arc voltage PLC control system that all power lines are corresponding are same PLC control
System processed.
The beneficial effects of the utility model are: by being respectively provided with integrator, distributor, AC converter and isolator
Independent 24VDC power supply is powered, and can avoid owing to the heating starting of LF stove frequently produces greater impact voltage to above-mentioned parts；
Thus the situation that above-mentioned part is burned can be reduced；And then guarantee that the normal of whole LF stove works, improve its work efficiency.Separately
Outward, corresponding RC series circuit is also set in arc voltage detecting system, it is achieved suppression voltage changing rate, can be to corresponding component
Play a protective role.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the arc stream detecting system annexation in this utility model；
Fig. 2 is the schematic diagram of the arc voltage detecting system annexation in this utility model；
Figure is labeled as: body of heater 1, electrode bar 2, power line 3, Luo-coil 41, integrator 42, distributor 43, arc stream
PLC control system the 44, first resistance 51, voltmeter 52, RC series circuit 53, arc voltage PLC control system 54, isolation
Transformator 55, AC converter 56, isolator 57,24VDC power supply 6.
Detailed description of the invention
With detailed description of the invention, this utility model is further illustrated below in conjunction with the accompanying drawings.
As shown in Figures 1 and 2, LF stove checking system for PCB described in the utility model, including body of heater 1, body of heater is by leading
Line ground connection, is provided with electrode bar 2 in body of heater, and electrode bar 2 is connected with power end by power line 3, also includes that arc stream detection is
System and arc voltage detecting system, described arc stream detecting system includes Luo-coil 41, integrator 42, distributor 43 and arc stream PLC
Control system 44, described Luo-coil 41 is enclosed within power line 3, and the most integrated device of Luo-coil 41 42 and distribution
Being connected with arc stream PLC control system 44 after device 43, described integrator 42 and distributor 43 are respectively by independent 24VDC electricity
Source 6 powers；Described arc voltage detecting system include the first resistance 51, voltmeter 52, RC series circuit 53, isolating transformer 55,
AC converter 56, isolator 57 and arc voltage PLC control system 54, one end of the first resistance 51 is with power line 3 even
Connecing, its other end is connected with one end of voltmeter 52, the other end ground connection of voltmeter 52；Described RC series circuit 53 and electricity
Pressure table 52 is in parallel, and the side of described isolating transformer 55 is in parallel with voltmeter 52, the opposite side of isolating transformer 55 warp successively
It is connected with arc voltage PLC control system 54 after AC converter 56 and isolator 57, described AC converter 56 He
Isolator 57 is powered by independent 24VDC power supply 6 respectively.
As it is shown in figure 1, in arc stream detecting system, the effect of Luo-coil 41 is the primary current of detection LF stove, and converts
Becoming the voltage signal of the output that is directly proportional to the differential of LF stove primary current, this voltage signal flows to integrator 42；Integrator 42
Effect be that the voltage signal carried from Luo-coil 41 is integrated, the available output being directly proportional to primary current is electric
Pressure, this output voltage signal flows to distributor 43；The signal come from integrator 42 conveying is acquired, puts by distributor 43
Greatly, computing and after carrying out anti-interference process, flow to arc stream PLC control system 44, the most i.e. complete the detection to arc stream.
As in figure 2 it is shown, in arc voltage detecting system, LF stove primary voltage is directly measured by voltmeter 52；And isolate change
The effect of depressor 55 is that LF stove primary voltage is filtered conversion, then the signal after conversion is flowed to alternating voltage conversion
Device 56；The effect of AC converter 56 be sinusoidal or lopsided ac voltage signal is converted into independent of load and with measurement
Being worth proportional d. c. voltage signal, this d. c. voltage signal flows to isolator 57 again；The effect of isolator 57 is to input
D. c. voltage signal pick-up and export the signal of isolation to arc voltage PLC control system 54.It addition, in arc voltage detecting system also
Being provided with RC series circuit 53, its effect is suppression voltage changing rate, to play a protective role corresponding component.
It addition, general, arc stream PLC control system 44 and arc voltage PLC control system 54 in this utility model can be same
One PLC control system, the detection of corresponding arc stream and arc voltage detection are connected with the different port of PLC control system respectively.
Additionally, it is generally the case that the power supply that LF stove uses is three phase mains, and therefore it is generally of three power lines 3, such as figure
Shown in tri-power lines 3 of U, V, W.Now, in order to detect every power line, this utility model is every electricity
Source line 3 is correspondingly provided with a Luo-coil 43, first resistance of 42, distributor of 41, integrator 51, one
56, the isolation of 55, AC converter of 53, isolating transformer of 52, RC series circuit of voltmeter
Device 57 and four respectively integrator 42, distributor 43, AC converter 56 and isolators 57 are independently-powered
24VDC power supply 6；Accordingly every power line 3 be detected as independent carrying out.
Certainly, above-mentioned every power line 3 is carried out independent detection in the case of, the arc stream of all power line 3 correspondences can be set
PLC control system 44 and arc voltage PLC control system 54 are same PLC control system, are examined in arc stream side and arc voltage accordingly
Survey and be connected with the different port of PLC control system.Concrete attachment structure can refer to shown in accompanying drawing.
Claims (4)
1.LF stove checking system for PCB, including body of heater (1), body of heater passes through wired earth, is provided with electrode bar (2) in body of heater,
Electrode bar (2) is connected with power end by power line (3), it is characterised in that: also include arc stream detecting system and arc voltage detection
System, described arc stream detecting system includes that Luo-coil (41), integrator (42), distributor (43) and arc stream PLC control
System (44), described Luo-coil (41) is enclosed within power line (3), and Luo-coil (41) the most integrated device (42)
Being connected with arc stream PLC control system (44) afterwards with distributor (43), described integrator (42) and distributor (43) are respectively
By independent 24VDC power supply (6) power supply；Described arc voltage detecting system includes the first resistance (51), voltmeter (52), RC
Series circuit (53), isolating transformer (55), AC converter (56), isolator (57) and arc voltage PLC control
System (54), one end of the first resistance (51) is connected with power line (3), and its other end connects with one end of voltmeter (52)
Connect, the other end ground connection of voltmeter (52)；Described RC series circuit (53) is in parallel with voltmeter (52), described isolation
The side of transformator (55) is in parallel with voltmeter (52), and the opposite side of isolating transformer (55) converts through alternating voltage successively
Device (56) and isolator (57) are connected with arc voltage PLC control system (54) afterwards, described AC converter (56) and
Isolator (57) is respectively by independent 24VDC power supply (6) power supply.
2. LF stove checking system for PCB as claimed in claim 1, it is characterised in that: arc stream PLC control system (44) and
Arc voltage PLC control system (54) is same PLC control system.
3. LF stove checking system for PCB as claimed in claim 1 or 2, it is characterised in that: described power line (3) has three
Root, every power line (3) be correspondingly provided with a Luo-coil (41), integrator (42), distributor (43),
One the first resistance (51), voltmeter (52), RC series circuit (53), isolating transformer (55),
One AC converter (56), an isolator (57) and four be respectively integrator (42), distributor (43),
AC converter (56) and the independently-powered 24VDC power supply (6) of isolator (57).
4. LF stove checking system for PCB as claimed in claim 3, it is characterised in that: the arc that all power lines (3) are corresponding
Stream PLC control system (44) and arc voltage PLC control system (54) are same PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620460100.7U CN205620460U (en) | 2016-05-19 | 2016-05-19 | LF stove circuit detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620460100.7U CN205620460U (en) | 2016-05-19 | 2016-05-19 | LF stove circuit detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205620460U true CN205620460U (en) | 2016-10-05 |
Family
ID=57024533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620460100.7U Active CN205620460U (en) | 2016-05-19 | 2016-05-19 | LF stove circuit detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205620460U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468250A (en) * | 2019-08-07 | 2019-11-19 | 河钢股份有限公司承德分公司 | A kind of LF refining furnace receiving electrode platform safety interlock and control method |
| CN113985102A (en) * | 2021-09-17 | 2022-01-28 | 阳春新钢铁有限责任公司 | System and method for detecting dynamic voltage of dual power cabinet |
-
2016
- 2016-05-19 CN CN201620460100.7U patent/CN205620460U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468250A (en) * | 2019-08-07 | 2019-11-19 | 河钢股份有限公司承德分公司 | A kind of LF refining furnace receiving electrode platform safety interlock and control method |
| CN110468250B (en) * | 2019-08-07 | 2021-10-29 | 河钢股份有限公司承德分公司 | Safety interlocking device for LF refining furnace electrode connecting platform and control method |
| CN113985102A (en) * | 2021-09-17 | 2022-01-28 | 阳春新钢铁有限责任公司 | System and method for detecting dynamic voltage of dual power cabinet |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |