CN209043500U - A kind of LF furnace electrode clamping force on-line measuring device - Google Patents
A kind of LF furnace electrode clamping force on-line measuring device Download PDFInfo
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- CN209043500U CN209043500U CN201821931154.2U CN201821931154U CN209043500U CN 209043500 U CN209043500 U CN 209043500U CN 201821931154 U CN201821931154 U CN 201821931154U CN 209043500 U CN209043500 U CN 209043500U
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- Prior art keywords
- electrode
- clamping force
- resistance
- bridge
- resistance strain
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Abstract
The utility model discloses a kind of LF furnace electrode clamping force on-line measuring devices, it includes bridge type pressure sensor, dynamic resistance strain instrument and data collecting card, the bridge type pressure sensor includes two resistance strain gages and two measuring resistances, first foil gauge is clipped between graphite electrode and electrode anchor ear liner plate, second foil gauge be attached on electrode anchor ear liner plate and with graphite electrode mutually from, two foil gauges and two measuring resistances concatenate be followed by bridge input voltage respectively, the concatenation point of two measuring resistances and the input terminal for concatenating the bridge output voltage between a little and connecing dynamic resistance strain instrument of two foil gauges, the output end of dynamic resistance strain instrument is connect through data collecting card with computer.The utility model electricity consumption bridge pressure sensor monitors electrode clamping force, the working condition of electrode clamping mechanism during can making an inspection person that smelting molten steel be well understood, discovery in time and exclusion accident potential, avoid electrode delamination accident, it is ensured that production equipment operates normally.
Description
Technical field
The utility model relates to one kind, and LF furnace electrode clamping mechanism can be accurately detected during smelting molten steel to graphite
The device for the clamping force that electrode is applied, belongs to detection technique field.
Background technique
LF furnace electrode clamping mechanism is one of key equipment of LF refining furnace, as shown in Figure 1, the electrode clamping mechanism is fortune
With solenoid directional control valve by after hydraulic fluid pressure off-load, electrode clamping cylinder push rod and electrode anchor ear are driven by the screen resilience of butterfly spring
Movement, graphite electrode is clamped between terminal clamp and electrode anchor ear.In process of production, frequent occurrence because of insufficient clamping force
Cause electrode to glide and crash into the production accident of molten steel, production is made to can not be successfully progress.Currently, the performance of LF furnace electrode clamping mechanism
The repair time is usually utilized, electrode is pumped, loosens stroke by the clamping-of detecting electrode anchor ear to be determined；But
In LF refining furnace smelting process, point inspection person is difficult to recognize the working condition of LF furnace electrode clamping mechanism, cannot find thing in time
Therefore hidden danger, it can not effectively avoid the generation of such production accident.
Utility model content
The purpose of this utility model is that aiming at the disadvantages of the prior art, providing a kind of LF furnace electrode clamping force on-line checking
Device guarantees the normal operation of LF refining furnace effectively to avoid electrode delamination accident.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of LF furnace electrode clamping force on-line measuring device includes that bridge type pressure sensor, dynamic electric resistor are answered in composition
Become instrument and data collecting card, the bridge type pressure sensor includes two resistance strain gages and two measuring resistances, and first answers
Change piece is clipped between graphite electrode and electrode anchor ear liner plate simultaneously and insulating graphite electrode, the second foil gauge are attached to electrode anchor ear liner plate
Above and with graphite electrode mutually from two foil gauges and two measuring resistances concatenate be followed by bridge input voltage respectively, two standards
The concatenation point of resistance and the input terminal for concatenating the bridge output voltage between a little and connecing dynamic resistance strain instrument of two foil gauges, institute
The output end for stating dynamic resistance strain instrument is connect through data collecting card with computer.
Above-mentioned LF furnace electrode clamping force on-line measuring device further includes calibration resistance and calibration switch, the mark in composition
Determine to be connected in parallel after resistance is connected in series with calibration switch with the first measuring resistance.
Above-mentioned LF furnace electrode clamping force on-line measuring device, two resistance strain gages are two panels same specifications with glass fibre
Cloth is the foil resistance foil gauge of substrate.
Above-mentioned LF furnace electrode clamping force on-line measuring device, the resistance value of two measuring resistances are 120 Ω.
The utility model utilizes the clamping force of bridge type pressure sensor monitoring LF furnace electrode clamping mechanism, can make an inspection
The working condition of electrode clamping mechanism during smelting molten steel is well understood in member, and discovery in time and exclusion accident potential avoid
The electrode delamination accident because of caused by clamp system failure, it is ensured that production equipment operates normally.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the structural schematic diagram of LF furnace electrode clamping mechanism；
Fig. 2 is stickup schematic diagram of the foil resistance foil gauge on electrode anchor ear；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the electric functional block diagram of the utility model；
Fig. 5 is the electrical schematic diagram of bridge type pressure sensor.
Drawing reference numeral is as follows: 1. graphite electrodes, 2. terminal clamps, 3. connectors, and 4. electrode clamping cylinders, 5. electrode clamping cylinders push away
Bar, 6. electric-pole horizontal arms, 7. electrodes clamp the cylinder piston, 8. disk springs, 9. flanges, 10. pin shafts, 11. insulation spacers, 12. adjustment
Gasket, 13. slide plates, 14. electrode anchor ears, R1, the first foil gauge, R2, the second foil gauge, R01, the first measuring resistance, R02, second
Measuring resistance, RS, calibration resistance, K, calibration switch.
Specific embodiment
The utility model provides a kind of LF furnace electrode clamping force on-line measuring device, which can make an inspection person clear
Ground understands during LF refining furnace smelting molten steel, the working condition of electrode clamping mechanism, reduces because of LF furnace electrode clamping mechanism
Electrode caused by failure slides accident.
Referring to Fig. 2~Fig. 5, the utility model includes homemade bridge type pressure sensor, dynamic resistance strain instrument, data
The hardware such as capture card, computer, wherein bridge type pressure sensor includes two resistance strain gage (the first foil gauge R1With
Two foil gauge R2), two measuring resistance (the first measuring resistance R01With the second measuring resistance R02), calibration resistance RSAnd calibration switch
K。
Two resistance strain gages are two panels same specifications using high temperature resistant, insulating materials glass fabric as the foil of substrate electricity
Hinder foil gauge, parameter are as follows: wire grid 6 × 4mm of size, size of foundation base 12 × 6.5mm, R1=R2=350 Ω；According to derusting, deoil
Dirt, scribing line, gluing, stickup, by the first foil gauge R1It is attached to the contact surface of graphite electrode (1) Yu electrode anchor ear liner plate
Between, the second foil gauge R2Electrode anchor ear liner plate is attached to not by electrode pressure, by the first foil gauge R1With the second foil gauge R2Pass through
There are two the bridge boxes of measuring resistance to form electric bridge for band, and added calibration switch K, calibration resistance R in electric bridges, utilize parallel connection
Demarcate resistance RsThe method of calibration carries out the signal scaling of initial operating stage to system；By homemade bridge type pressure sensor, move
The hardware such as state resistance strain gauge, data collecting card and computer connect.Wherein, dynamic resistance strain instrument selects AFT-0951
Type binary channels dynamic resistance strain instrument；Data collecting card selects the PCI-6220 of NI company, it is the multi-functional M system of a low price
The data collecting card of column.When clamping force changes, pass through the first foil gauge R1Variation so that bridge output voltage UdHair
Changing.
The application method of the utility model: calibration switch K, parallel connection calibration resistance R are closed firsts, signal is carried out to system
Calibration, bridge output voltage U when calibrationmIt can be collected in computer and store；Then the sample frequency of setting signal will count
Voltage signal when measurement collected according to capture card is transmitted in computer, is filtered with composite algorithm to signal；Finally
By filtered voltage UdClamping force conversion formula is substituted into, calculates clamping force, and in computer screen in the form of waveform chart
The real-time tendency variation of clamping force is shown on curtain.Clamping force conversion formula is as follows:
In formula, εsIt is calibration resistance RsStrain, system initial operating stage carry out signal scaling when on dynamic resistance strain instrument
It voluntarily selects, generally takes εs=1000 μ ε；UmThe output voltage of electric bridge when being calibration；UdThe output voltage of electric bridge when being measurement.
Point inspection person can be understood that the size of the real-time clamping force of LF furnace electrode clamping mechanism by computer picture
And its variation tendency judges the disk spring inside LF furnace electrode clamping mechanism if the clamping force detected is lower than setting value
It damages, needs to disassemble replacement, so as to avoid the production accident because of caused by the failure of LF furnace electrode clamping mechanism.
Claims (4)
1. a kind of LF furnace electrode clamping force on-line measuring device, characterized in that include bridge type pressure sensor, dynamic in composition
Resistance strain gauge and data collecting card, the bridge type pressure sensor include two resistance strain gages and two measuring resistances,
First foil gauge (R1) be clipped between graphite electrode (1) and electrode anchor ear (14) liner plate and insulate with graphite electrode (1), second answers
Become piece (R2) be attached on electrode anchor ear (14) liner plate and with graphite electrode (1) mutually from two foil gauges and two measuring resistances point
It Chuan Jie be followed by bridge input voltage, the concatenation point of two measuring resistances is exported with the electric bridge of two foil gauges concatenated between a little
Voltage connects the input terminal of dynamic resistance strain instrument, and the output end of the dynamic resistance strain instrument connects through data collecting card and computer
It connects.
2. a kind of LF furnace electrode clamping force on-line measuring device according to claim 1, characterized in that further include in composition
Demarcate resistance (RS) and calibration switch (K), the calibration resistance (RS) with calibration switch (K) be connected in series after with the first standard electric
Hinder (R01) be connected in parallel.
3. a kind of LF furnace electrode clamping force on-line measuring device according to claim 1 or 2, characterized in that two resistance
Foil gauge is two panels same specification using glass fabric as the foil resistance foil gauge of substrate.
4. a kind of LF furnace electrode clamping force on-line measuring device according to claim 3, characterized in that two measuring resistances
Resistance value be 120 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931154.2U CN209043500U (en) | 2018-11-22 | 2018-11-22 | A kind of LF furnace electrode clamping force on-line measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821931154.2U CN209043500U (en) | 2018-11-22 | 2018-11-22 | A kind of LF furnace electrode clamping force on-line measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209043500U true CN209043500U (en) | 2019-06-28 |
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ID=67043248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821931154.2U Expired - Fee Related CN209043500U (en) | 2018-11-22 | 2018-11-22 | A kind of LF furnace electrode clamping force on-line measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN209043500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284613A (en) * | 2020-10-27 | 2021-01-29 | 深圳市鑫精诚科技有限公司 | Calibration method of force sensor |
-
2018
- 2018-11-22 CN CN201821931154.2U patent/CN209043500U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284613A (en) * | 2020-10-27 | 2021-01-29 | 深圳市鑫精诚科技有限公司 | Calibration method of force sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190628 Termination date: 20211122 |