CN2688422Y - Microwave pickup for molten iron level meter for iron mixing trolley - Google Patents
Microwave pickup for molten iron level meter for iron mixing trolley Download PDFInfo
- Publication number
- CN2688422Y CN2688422Y CN 200320115206 CN200320115206U CN2688422Y CN 2688422 Y CN2688422 Y CN 2688422Y CN 200320115206 CN200320115206 CN 200320115206 CN 200320115206 U CN200320115206 U CN 200320115206U CN 2688422 Y CN2688422 Y CN 2688422Y
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- China
- Prior art keywords
- microwave
- output
- mixer
- molten iron
- circulator
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Abstract
The utility model relates to a microwave head for the microwave molten iron level meter for the iron mixing trolley; the output terminal of the scanning voltage driver (8) is connected with the input terminal of the microwave Gunn oscillator (9), and the output terminal of the oscillator (9) is connected with the input terminal of the microwave power divider(10); the one-circuit output terminal of the power divider(10) is connected with the input terminal of the microwave circulator(11), and the one-circuit output terminal is connected with the one-circuit input terminal of the microwave mixer(13); the microwave circulator(11), whose output terminal is connected with another one-circuit input terminal of the microwave mixer(13), is connected with the microwave antenna (12), and the output terminal of the mixer(13) is connected with the A/D acquisition card in the existing machine cabinet (2); the electromagnetic waves emitted by the antenna (12) are simultaneously projected onto the mouth of the tank of the iron mixing trolley(5) and the molten iron level(6) through the hole right opposite to the mouth of the tank of the iron mixing trolley, on the operation platform (3).
Description
Technical field:
The utility model is relevant with the microwave head of the liquid level gauge of measuring torpedo hot metal mixer car molten iron liquid level.
Background technology:
Molten iron large-scale or super-huge blast furnace process adopts torpedo hot metal mixer car to transport.In the injection process of molten iron, need the iron water amount that injects torpedo hot metal mixer car is monitored.At present, what torpedo hot metal mixer car injected that the monitoring of iron water amount adopts is the mode of weighing, and this mode has higher certainty of measurement at the initial stage of calibration, but because site environment is relatively poor, along with its precision of increase of service time can descend gradually.Therefore, adopt this mode to monitor torpedo hot metal mixer car molten iron injection rate and just need frequent calibration.The time interval of calibration is too short, can influence the ordinary production of blast furnace; The time interval of calibration is oversize, and the decline of its precision can influence the validity of its use again.Because the blast furnace production cycle is generally all much larger than guaranteeing the molten iron weighing precision required calibration cycle, therefore in the production process of reality, molten iron is weighed and all is in the state of low precision in the most of the time, has to adopt the mode of artificial visually examine's liquid level to finish the control of molten iron injection rate.And the mode of employing artificial visually examine molten iron liquid level, its certainty of measurement depends on operating personnel's qualification, the state when working and the factors such as sense of responsibility of work can not satisfy production, particularly the requirement of automated production fully.
The content of utility model:
The purpose of this utility model provides a kind of precision height, and effective period is long, and is easy to operate, can directly carry out the torpedo hot metal mixer car microwave molten iron liquid level meter microwave head of on-line monitoring to torpedo hot metal mixer car molten iron liquid level.
The utility model is achieved in that
The utility model torpedo hot metal mixer car microwave molten iron liquid level meter microwave head, the output of sweep voltage driver (8) is connected with the input of microwave Gunn oscillator (9), the output of oscillator (9) is connected with the input of microwave power distributor (10), one tunnel output of power splitter (10) is connected with the input of microwave circulator (11), one tunnel output is connected with one tunnel input of microwave mixer (13), microwave circulator (11) is connected with microwave antenna (12), its output is connected with another road input of microwave mixer (13), the output of frequency mixer (13) is connected with the A/D capture card of existing rack (2), and the electromagnetic wave of antenna (12) emission is gone up over against the hole of torpedo hot metal mixer car jar mouth by operating platform (3) and projected simultaneously on torpedo hot metal mixer car jar mouth (5) and the molten iron liquid level (6).
Oscillator (9) is 47271H-9705, power splitter (10) is 45391H-2200, circulator (11) is 45161H-203, antenna is 45811H-2406, frequency mixer (13) is 47411H-2010, the Ka wave band rectangular flange waveguide of standard is adopted in connection between each microwave device, one output of power splitter (10) connects the LO end of frequency mixer (13), another output connects 1 end of circulator (11), 2 ends of circulator (11) link to each other with antenna (12), 3 ends link to each other with the RF end of frequency mixer (13), driver (8) links to each other with the frequency sweep input of oscillator (9) with the cable that has sub-miniature A connector, and the intermediate frequency output of frequency mixer (13) adopts the cable that has sub-miniature A connector to link to each other with rack (2).
Single-chip microcomputer (the U of sweep voltage driver (8)
1) data assembly line (D
0-D
7) respectively with latch (U
2), EEPROM memory (U
3), D/A converter (U
4) link to each other U
2Isolate U
1Low eight A of address bus
0-A
7With U
1High eight-bit A
8-A
15Constitute 16 bit address bus and U
3And U
4Address or sheet select pin to connect, integrated regulator U
5Output and U
4Reference voltage end link to each other U
4The analog signal of output is through dual operational amplifier (U
6) output to microwave Gunn oscillator after the amplification filtering.
Electromagnetic beam is still received, is isolated the laggard microwave mixer device (13) of going into through circulator (11) transmitting-receiving by microwave antenna (12) after the reflection of jar mouth and molten iron liquid level, the local oscillation signal of sending here with microwave power distributor (10) carries out the beat mixing, the output intermediate-freuqncy signal, enter preprocessor finish amplification, the filter little processing after, send into the A/D capture card again, the frequency sweep synchronizing signal of sweep voltage driver (8) input is sent into industrial computer with synchronous triggerings A/D capture card after to the intermediate frequency signal synchronous collection and is carried out the fault-signal processing, and industrial computer is connected with guidance panel with display floater.
The utility model provides a kind of and directly the torpedo hot metal mixer car molten iron is injected the equipment that liquid level is carried out on-line monitoring.Characteristics such as the mode of this direct measurement molten iron liquid level has the precision height, and effective period is long, need not manually to assist can satisfy the demand that the automation of blast furnace is produced better.
Because the temperature very high (being about 1400 ℃) of molten iron itself should not adopt the metering system of contact to measure.In the non-contact measurement mode,, therefore can not adopt the bigger ultrasonic power of temperature influence because high temperature liquid iron is bigger to the influence of environment temperature; Because molten iron has the bigger dust and the ornamental work of iron that splashes when injecting, therefore can not adopt laser mode.For this reason, the utility model adopts microwave mode neither influenced by ambient temperature, that not influenced by the on-the-spot dust and the ornamental work of iron again.The technical solution of the utility model: place a microwave measuring equipment directly over the torpedo hot metal mixer car molten iron inlet, the wave beam of microwave equipment emission shines on the jar mouthful platform and molten iron surface of torpedo hot metal mixer car simultaneously, the echo that receiving tank mouth platform and molten iron surface reflection simultaneously comes, by differentiating jar mouthful platform and molten iron liquid level back wave and measuring separately to the distance of microwave measuring equipment, just can obtain with torpedo hot metal mixer car jar mouth is the molten iron liquid level of benchmark.
The effect that the utility model is useful is: adopt microwave mode directly to measure the distance of torpedo hot metal mixer car jar mouth platform to the molten iron surface, measured molten iron liquid level and torpedo hot metal mixer car individual difference are irrelevant, the influence that not sunk by torpedo hot metal mixer car full load spring.Measurement can be when molten iron injects online carrying out, be not subjected to the influence of on-the-spot factors such as environment temperature, dust.The scene of whole system equipment is installed simple, and the on-the-spot construction volume ratio mode of weighing is much smaller, need not calibration during operation.
Description of drawings:
Fig. 1 is the utility model measuring principle schematic diagram.
Fig. 2 is the utility model system architecture schematic diagram.
Fig. 3 is the electrical schematic diagram of sweep voltage driver.
Among the figure, the 1st, microwave head, the 2nd, on-the-spot rack, the 3rd, execute-in-place platform, the 4th, torpedo hot metal mixer car, the 5th, torpedo hot metal mixer car jar mouth, the 6th, the molten iron liquid level, 7 transportation rails, the 8th, sweep voltage driver, the 9th, microwave Gunn oscillator, the 10th, microwave power distributor, the 11st, microwave circulator, the 12nd, microwave antenna, the 13rd, microwave mixer.
The specific embodiment:
The utility model is the microwave head of microwave molten iron liquid level meter, and the processing of its output signal and demonstration are finished by on-the-spot rack 2, as Fig. 1.Microwave head 1 be installed on torpedo hot metal mixer car jar mouth 5 directly over operating platform 3 on, pass through the hole should opening a microwave beam in the position directly over the torpedo hot metal mixer car jar mouth on the operating platform 3.On-the-spot rack 2 can be installed on the operating platform 3 far away and be convenient to the position of site operation personnel's operation from the microwave head.Before molten iron injected, torpedo hot metal mixer car 4 entered into assigned address through transportation rail 7.The process that molten iron injects, the microwave beam of the certain width that microwave head 1 sends projects on torpedo hot metal mixer car jar mouth 5 and the molten iron liquid level 6 simultaneously, microwave signal by torpedo hot metal mixer car jar mouth 5 and 6 reflections of molten iron liquid level just can be measured the distance of molten iron liquid level 6 to 5 in torpedo hot metal mixer car jar mouth after the microwave head receives and differentiates, i.e. the molten iron liquid level.Microwave head 1 described in the utility model is made up of sweep voltage driver 8, microwave Gunn oscillator 9, microwave power distributor 10, microwave circulator 11, microwave antenna 12 and microwave mixer 13, as Fig. 2.The collection of microwave head output signal, processing and demonstration are finished by on-the-spot rack 2.The utility model is based on the principle of radar range finding, and the radar system of employing is linear frequency modulation continuous wave (LFMCW) system.About the range measurement principle of LFMCW radar and distance by radar resolving power theory can referring to U.S. Merrill I.Skolnik chief editor, Wang Jun etc. translate " the 537th～574 page of radar handbook one book published by the Electronic Industry Press in 2003 years.Measuring process of the present utility model is such: under the effect of sweep voltage driver 8, microwave Gunn oscillator 9 produces a wide-band linearity CW with frequency modulation signal, and this signal is divided into two-way by microwave power distributor 10.One the tunnel delivers to microwave antenna 12 through microwave circulator 11 launches electromagnetic wave, and one the road delivers to microwave mixer 13 as local oscillation signal.The electromagnetic wave of microwave antenna 12 emissions is still received by microwave antenna 12 after torpedo hot metal mixer car jar mouth 5 and 6 reflections of molten iron liquid level, isolate the laggard microwave mixer device 13 of going into through circulator 11 transmitting-receiving, the local oscillation signal of sending here with microwave power distributor 10 carries out the beat mixing, the output intermediate-freuqncy signal.This intermediate-freuqncy signal enters that on-the-spot rack 2 amplifies, filtering, collection, processing and demonstration.In the present embodiment, the Ka wave band device that microwave partly adopts U.S. Millitech Corporation to produce, select 47271H-9705 for use as oscillator 9, power splitter 10 is selected 45391H-2200 for use, circulator 11 is selected 45161H-203 for use, antenna 12 is selected 45811H-2406 for use, and frequency mixer 13 is selected 47411H-2010 for use.The Ka wave band rectangular flange waveguide of standard is adopted in connection between each microwave device.During connection, the output of oscillator 9 is connected to the input of power splitter 10; One of two output of power splitter 10 are connected to the LO end of frequency mixer 13,1 end that is connected to circulator 11; 2 ends of circulator 11 link to each other with antenna 12, and 3 ends link to each other with the RF end of frequency mixer 13.Sweep voltage driver 8 adopts the cable that has sub-miniature A connector to link to each other with the frequency sweep input of oscillator 9, and the intermediate frequency output of frequency mixer 13 also adopts the cable that has sub-miniature A connector to link to each other with on-the-spot rack 2.The electrical schematic diagram of sweep voltage driver 8 such as Fig. 3, the prior burned EEPROM (U of the Wave data of sweep voltage
328C64B), during sweep voltage work, at control single chip computer (U
1AT89C51) under the control, EEPROM (U
3) in Wave data be read into single-chip microcomputer (U earlier
1), again through U
2(74HCT573) with the data of output with after address signal separates, send into D/A (U
4TLV5613) data signal is converted to analog signal, after operational amplifier (U
6LM258) amplify, output to microwave oscillator 9 after the filtering.U among Fig. 3
5REF191 is a voltage reference source, for D/A provides reference voltage.When the microwave head of present embodiment is worked, the sweep voltage of sweep voltage driver 8 outputs is 10～18V, the centre frequency of the linear frequency modulation continuous wave signal of microwave Gunn oscillator 9 outputs is 35GHz, bandwidth is 500MHz, and its corresponding distance by radar resolving power (also being the ability that radar is differentiated two phase close-targets) is 30cm.Because the ULN that torpedo hot metal mixer car injects molten iron is greater than 50cm apart from the distance of jar mouth, so bandwidth is that the microwave liquid level gauge of 500MHz just can correctly be told torpedo hot metal mixer car jar mouth (5) and molten iron liquid level (6) and measure the molten iron liquid level in whole measurement category.
U among the figure
1Be single-chip microcomputer, U
2Be latch, U
3Be EEPROM memory, U
4Be D/A converter, U
5Be integrated regulator, U
6Be dual operational amplifier.U
1Data/address bus D
0～D
7Respectively with U
2, U
3, U
4Link to each other U
2Isolate low eight A of address bus
0～A
7With U
1High eight-bit A
8～A
5Constitute 16 bit address buses, be input to U
3And U
4Address or sheet select on the pin.U
3Be used to store the Wave data of frequency sweep driving voltage, through U
4Become analog signal after the D/A conversion.Analog signal is through U
5Operational amplifier U6A amplify after, after U6B filtering is amplified in another computing, output to microwave Gunn oscillator again.
Claims (4)
1, torpedo hot metal mixer car microwave molten iron liquid level meter microwave head, the output that it is characterized in that sweep voltage driver (8) is connected with the input of microwave Gunn oscillator (9), the output of oscillator (9) is connected with the input of microwave power distributor (10), one tunnel output of power splitter (10) is connected with the input of microwave circulator (11), one tunnel output is connected with one tunnel input of microwave mixer (13), microwave circulator (11) is connected with microwave antenna (12), its output is connected with another road input of microwave mixer (13), the output of frequency mixer (13) is connected with the A/D capture card of existing rack (2), and the electromagnetic wave of antenna (12) emission is gone up over against the hole of torpedo hot metal mixer car jar mouth by operating platform (3) and projected simultaneously on torpedo hot metal mixer car jar mouth (5) and the molten iron liquid level (6).
2, microwave head according to claim 1, it is characterized in that oscillator (9) is 47271H-9705, power splitter (10) is 45391H-2200, circulator (11) is 45161H-203, antenna is 45811H-2406, frequency mixer (13) is 47411H-2010, the Ka wave band rectangular flange waveguide of standard is adopted in connection between each microwave device, one output of power splitter (10) connects the LO end of frequency mixer (13), another output connects 1 end of circulator (11), 2 ends of circulator (11) link to each other with antenna (12), 3 ends link to each other with the RF end of frequency mixer (13), driver (8) links to each other with the frequency sweep input of oscillator (9) with the cable that has sub-miniature A connector, and the intermediate frequency output of frequency mixer (13) adopts the cable that has sub-miniature A connector to link to each other with rack (2).
3, microwave head according to claim 1 and 2 is characterized in that the single-chip microcomputer (U of sweep voltage driver (8)
1) data/address bus (D
0-D
7) respectively with latch (U
2), EEPROM memory (U
3), D/A converter (U
4) link to each other U
2Isolate U
1Low eight A of address bus
0-A
7With U
1High eight-bit A
8-A
15Constitute 16 bit address bus and U
3And U
4Address or sheet select pin to connect, integrated regulator U
5Output and U
4Reference voltage end link to each other U
4The analog signal of output is through dual operational amplifier (U
6) output to microwave Gunn oscillator after the amplification filtering.
4, microwave head according to claim 1 and 2, it is characterized in that electromagnetic beam is still received by microwave antenna (12) after jar mouth and the reflection of molten iron liquid level, isolate the laggard microwave mixer device (13) of going into through circulator (11) transmitting-receiving, the local oscillation signal of sending here with microwave power distributor (10) carries out the beat mixing, the output intermediate-freuqncy signal, enter preprocessor and finish amplification, after filtering little processing, send into the A/D capture card again, the frequency sweep synchronizing signal of sweep voltage driver (8) input is sent into industrial computer with synchronous triggerings A/D capture card after to the intermediate frequency signal synchronous collection and is carried out the fault-signal processing, and industrial computer is connected with guidance panel with display floater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115206 CN2688422Y (en) | 2003-12-05 | 2003-12-05 | Microwave pickup for molten iron level meter for iron mixing trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320115206 CN2688422Y (en) | 2003-12-05 | 2003-12-05 | Microwave pickup for molten iron level meter for iron mixing trolley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688422Y true CN2688422Y (en) | 2005-03-30 |
Family
ID=34661821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320115206 Expired - Lifetime CN2688422Y (en) | 2003-12-05 | 2003-12-05 | Microwave pickup for molten iron level meter for iron mixing trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688422Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430698C (en) * | 2005-07-29 | 2008-11-05 | 宝山钢铁股份有限公司 | Torpedo tank car molten iron liquid surface measuring method and its device |
| CN103884400B (en) * | 2014-04-09 | 2016-08-24 | 莱芜钢铁集团有限公司 | The measuring method of a kind of hot-metal bottle molten iron degree of depth and measurement apparatus |
-
2003
- 2003-12-05 CN CN 200320115206 patent/CN2688422Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430698C (en) * | 2005-07-29 | 2008-11-05 | 宝山钢铁股份有限公司 | Torpedo tank car molten iron liquid surface measuring method and its device |
| CN103884400B (en) * | 2014-04-09 | 2016-08-24 | 莱芜钢铁集团有限公司 | The measuring method of a kind of hot-metal bottle molten iron degree of depth and measurement apparatus |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131205 Granted publication date: 20050330 |