CN202539186U - Tension detection and tension loss protection device for rolling mill - Google Patents
Tension detection and tension loss protection device for rolling mill Download PDFInfo
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- CN202539186U CN202539186U CN201220162180XU CN201220162180U CN202539186U CN 202539186 U CN202539186 U CN 202539186U CN 201220162180X U CN201220162180X U CN 201220162180XU CN 201220162180 U CN201220162180 U CN 201220162180U CN 202539186 U CN202539186 U CN 202539186U
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- jockey pulley
- rolling mill
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Abstract
The utility model relates to a tension detection and tension loss protection device for a rolling mill, and is applied to the technical field of steel plate cold rolling and calendering. The tension detection and tension loss protection device for the rolling mill consists of tension rollers, four pressure sensors, a programmable logic controller (PLC) and a comparator, wherein the tension rollers are arranged between deoiling rollers and deflector rollers of the rolling mill, arranged at the inlet and outlet of the rolling mill and connected with a steel strip; the pressure sensors are arranged below bearing seats at the two ends of each tension roller; the PLC is connected with the pressure sensors through current signals and connected with the comparator through a signal wire; and the comparator is connected with a power device of the rolling mill. The device has the advantages of high sensitivity and long service life and is safe, flexible and reliable.
Description
Technical field
The utility model relates to a kind of milling train tension force and detects and a mistake protective device, is applied to cold-rolling of steel plate calendering technical field.
Background technology
In the steel plate rolling process, the possibility that the broken belt accident takes place is inevitably, through the raising of equipment and technology, control technology and operating technology, can reduce the generation of broken belt accident, but what will thoroughly avoid broken belt is unpractical.The band steel high-speed rolling in, the broken belt accident be paroxysmal.In case broken belt will cause unpredictable infringement to personnel and equipment.In order to reduce the loss as far as possible, avoid accident, milling train will be accomplished a series of protection actions in the fastest time.Comprise: hydraulic system drain charge, roll gap are opened, roll braking stall, and coil of strip is braked stall, calibrator cuts out and withdraw from automatically etc.Because operator's physiological reaction speed is limited, and each operator's emergency processing ability also is not quite similar.So when the broken belt accident took place, except the operator will take urgent measure, milling train self also will have an automatic emergency protection.
So; How does milling train judge the milling train broken belt when rolling normal? As shown in Figure 1; Traditional broken belt protector adopts a pair of infrared photoelectric switch to detect, through the optoelectronic switch emission source and accept to have between the source have no occluder whether to confirm broken belt, because the work under bad environment of optoelectronic switch; Often break down, the automatic protection of the broken belt of milling train often can not play a role reliably.In case the broken belt accident takes place, the folded steel of heap steel very easily takes place, be stained with the quick-fried roller of steel, disconnected cross axle even roll scrap.Also to stop production the long period and handle the broken belt accident.
The utility model content
The utility model technical problem to be solved provides a kind of reasonable in design, milling train tension force highly sensitive, that safety is flexible, Q-percentile life is long detects and lose a protective device.
It is that this milling train tension force detects and a mistake protective device that the utility model solves the problems of the technologies described above the technical scheme that is adopted; Its design feature is: be made up of jockey pulley, pressure sensor, programmable logic controller (PLC), comparator; Described jockey pulley is arranged on removing between oiling roller and the rectification roll of milling train; A jockey pulley is respectively installed in the gateway of milling train, and said jockey pulley is connected with steel band, and said pressure sensor is arranged under the bearing block at jockey pulley two ends; Be provided with four pressure sensors altogether; Said programmable logic controller (PLC) links to each other with pressure sensor through current signal, and said programmable logic controller (PLC) links to each other with comparator through holding wire, and said comparator links to each other with the power set of milling train.
The described jockey pulley of the utility model is installed in the milling train slewing rollers nearby near a side of mill housing.
Because the effect of slewing rollers is arranged, the cornerite of band steel on jockey pulley can be with the size variation in volume footpath, and this has just brought convenience for pressure at right angle is converted into strip tension.
The utility model technical problem to be solved is at milling train rectification roll installed inside jockey pulley; Below two bearing blocks of jockey pulley, a pressure sensor is installed respectively; Send current signal behind two pressure sensor pressurizeds, current strength is directly proportional with pressure.Arithmetic mean of instantaneous value with two pressure sensor pressures is presented on the milling train main control screen as detected value, and opens the signal source of protecting with this as losing.A jockey pulley is respectively installed in the gateway of milling train, and a pressure sensor respectively is installed under the two end axles bearing of each jockey pulley, and milling train is totally four pressure sensors.Show the outlet and two tension values that enter the mouth altogether.Install after the jockey pulley, whether surpass with the milling train tension fluctuation and set or do not lose suddenly tension force and whether the judgment basis of broken belt is arranged, replaced leaning on whether the photosignal conduct is arranged is the judgment basis of broken belt originally as milling train.The reliability that equipment operational reliability, signal are sent out fast all is guaranteed.
It is following to lose the basic functional principle of opening protection: milling train must be set up tension force earlier when belt steel rolling; Then could be rolling; Output through jockey pulley transmission side and fore side pressure sensor analog current (4---20mA) detect the size of tension force, the big more output current of tension force is big more, otherwise more little.The output current of its pressure sensor and the relation of strip tension are the linear positive relation, and relational expression is (seeing accompanying drawing 2):
In the P=FA ÷ sin α formula: P: strip tension; F: coefficient A: the analog current (mA) of pressure sensor output; α: band steel deflection angle
Though it is normally rolling that the band tension force of steel when rolling along with width and the thickness of band steel constantly change, needs only, tension force be never 0 and >=10KN.We are set in roll rotational speed and are not equal under 0 the prerequisite, in case when tension force＜10KN takes place, or tension force transient fluctuation rate is judged to be broken belt when surpassing setting value.Computer sends a series of guard signals immediately, and a series of protection actions are accomplished in the automatic fast reaction of milling train.Guarantee that machinery, hydraulic pressure, electrical equipment and roll roller are injury-free.
The utility model is compared with prior art and is had the following advantages and effect: 1, because the measured value of jockey pulley is presented on the main panel intuitively; Give signal directly perceived of operator; Can former setting tension force and actual measurement tension force be done comparison, be convenient to the operator and in time control mill data.2, with the broken belt protector signal of tension signal as milling train, its reliability, reaction sensibility improve greatly, and equipment is reliable, and fault rate reduces greatly.3, no matter still broken belt not of broken belt; Excessive or lose tension force as long as the moment tension fluctuation takes place in the operation of rolling, catastrophe failure will take place in milling train, opens protection so broken belt protector is expanded as to lose; Enlarged the milling train protection domain, good effect is played in normal operation to assurance equipment.
On milling train, install tension roller additional, detect with tension force and whether confirm broken belt, promptly tension fluctuation is excessive or lose tension force suddenly and just think broken belt.Even so, when high-speed rolling,, also should realize the self-protection of milling train even if the excessive broken belt that do not cause of tension fluctuation also can cause greatest infringement to milling train.Facts have proved that the sensitiveness of the accuracy that tension force detects, stability, milling train reaction all reaches 100%.
Description of drawings
Fig. 1 is the structural representation of background technology.
Fig. 2 is the structural representation of the utility model.
Fig. 3 opens protection control structure sketch map for the mistake of the utility model.
Label declaration: backing roll 1, intermediate calender rolls 2, working roll 3, remove oiling roller 4, rectification roll 5, coil of strip 6, photoelectric tube emission source 7, photoelectric tube reception sources 8, jockey pulley 9, pressure sensor 10.
The specific embodiment
Below in conjunction with embodiment the utility model is done further detailed description, following examples are to the explanation of the utility model and the utility model is not limited to following examples.
Embodiment 1: like Fig. 2, shown in 3, the milling train tension force of present embodiment detects with a mistake protective device to be made up of jockey pulley 9, pressure sensor 10, PLC (programmable logic controller (PLC)), comparator.
On milling train, be disposed with backing roll 1, intermediate calender rolls 2, working roll 3; Remove oiling roller 4 and be arranged on both sides; Rectification roll 5 is arranged on except that oiling roller 5, and rectification roll 5 installed inside jockey pulleys 9 are respectively installed a pressure sensor 10 below two bearing blocks of jockey pulley 9; Send current signal behind two pressure sensor 10 pressurizeds, current strength is directly proportional with pressure.Arithmetic mean of instantaneous value with two pressure sensor pressures is presented on the milling train main control screen as detected value, and opens the signal source of protecting with this as losing.A jockey pulley 9 is respectively installed in the gateway of milling train, and 10, one milling trains of a pressure sensor totally four pressure sensors 10 respectively are installed under the two end axles bearing of each jockey pulley 9.Show the outlet and two tension values that enter the mouth altogether.Install after the jockey pulley 9, whether surpass with the milling train tension fluctuation and set or do not lose suddenly tension force and whether the judgment basis of broken belt is arranged, replaced leaning on whether the photosignal conduct is arranged is the judgment basis of broken belt originally as milling train.The reliability that equipment operational reliability, signal are sent out fast all is guaranteed.
Pressure sensor 10 transmits current signal and gives PLC, and the comparative analysis in comparator of measured signal and setting signal is sent guard signal when surveying tension force less than setting tension force, and milling train is realized stopping in emergency, a series of protection actions completion automatically.
The utility model is applied to also can be applicable on the singlestandmill of other forms such as single-stand four-high rolling mill, twelve high mill, mill, MKW mill, positive mkw mill on the HC six-high cluster mill of cold-rolling of steel plate calendering industry.
In addition, need to prove, the specific embodiment described in this specification, its zero, the shape of parts, institute's title of being named etc. can be different.Allly conceive equivalence or the simple change that described structure, characteristic and principle are done, include in the protection domain of the utility model patent according to the utility model patent.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; Only otherwise depart from the structure of the utility model or surmount the defined scope of these claims, all should belong to the protection domain of the utility model.
Claims (2)
1. a milling train tension force detects with mistake and opens a protective device; It is characterized in that: be made up of jockey pulley, pressure sensor, programmable logic controller (PLC), comparator, described jockey pulley is arranged on removing between oiling roller and the rectification roll of milling train, and a jockey pulley is respectively installed in the gateway of milling train; Said jockey pulley is connected with steel band; Said pressure sensor is arranged under the bearing block at jockey pulley two ends, is provided with four pressure sensors altogether, and said programmable logic controller (PLC) links to each other with pressure sensor through current signal; Said programmable logic controller (PLC) links to each other with comparator through holding wire, and said comparator links to each other with the power set of milling train.
2. milling train tension force according to claim 1 detects with losing opens a protective device, it is characterized in that: described jockey pulley is installed in the milling train slewing rollers nearby near a side of mill housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220162180XU CN202539186U (en) | 2012-04-17 | 2012-04-17 | Tension detection and tension loss protection device for rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220162180XU CN202539186U (en) | 2012-04-17 | 2012-04-17 | Tension detection and tension loss protection device for rolling mill |
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| Publication Number | Publication Date |
|---|---|
| CN202539186U true CN202539186U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220162180XU Expired - Fee Related CN202539186U (en) | 2012-04-17 | 2012-04-17 | Tension detection and tension loss protection device for rolling mill |
Country Status (1)
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| CN (1) | CN202539186U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275349A (en) * | 2014-07-02 | 2015-01-14 | 浙江富春环保新材料有限公司 | Rolling mill with speed measuring and pressure regulating structure |
| CN106755933A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Inlet loop mechanism, system and continuous-release line loop control method |
| CN113118214A (en) * | 2021-04-16 | 2021-07-16 | 上海五星铜业股份有限公司 | Rolling equipment and rolling method |
| CN113477709A (en) * | 2021-06-17 | 2021-10-08 | 天津太钢天管不锈钢有限公司 | Production process suitable for controlling oil stains on surface of austenitic cold-rolled stainless steel |
-
2012
- 2012-04-17 CN CN201220162180XU patent/CN202539186U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275349A (en) * | 2014-07-02 | 2015-01-14 | 浙江富春环保新材料有限公司 | Rolling mill with speed measuring and pressure regulating structure |
| CN104275349B (en) * | 2014-07-02 | 2016-05-25 | 浙江富春环保新材料有限公司 | A kind of milling train with the pressure adjusting structure that tests the speed |
| CN106755933A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Inlet loop mechanism, system and continuous-release line loop control method |
| CN113118214A (en) * | 2021-04-16 | 2021-07-16 | 上海五星铜业股份有限公司 | Rolling equipment and rolling method |
| CN113477709A (en) * | 2021-06-17 | 2021-10-08 | 天津太钢天管不锈钢有限公司 | Production process suitable for controlling oil stains on surface of austenitic cold-rolled stainless steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20121121 Termination date: 20180417 |