CN104001737B - For band steel temperature measurement roller and the temperature measurement data analytical procedure of rolling mill production line - Google Patents

Abstract

The present invention discloses a kind of band steel temperature measurement roller for rolling mill production line and temperature measurement data analytical procedure, the inboardend of this temperature measurement roller and sliding end transmission shaft connect body of roll two ends, some temperature measurement modules at least become a straight line to be fixed on body of roll inwall and stagger successively with retaining collar, sliding end transmission shaft is located at successively by fixing and compression ring flange, sliding end transmission shaft inner chamber is located at pressing plate interval, front and back, heat insulation tapetum fibrosum is filled therebetween, and terminal box and conducting slip ring connect compression ring flange successively. Present method, according to temperature measurement module coordinate and temperature value, obtains temperature approach, obtains temperature and temperature difference distribution function through fitting of a curve and monitors belt steel temperature and the temperature difference, and the temperature difference is greater than set(ting)value and reports to the police, and belt steel temperature additional stress is monitored according to additional temp stress curve. This temperature measurement roller has transmission and temp sensing function concurrently, is convenient to repair and maintenance; Present method avoids other factors to disturb, it is achieved the temperature in strip width direction, the display of temperature difference curve, excessive temperature differentials are reported to the police and temperature additional stress monitor in real time.

Description

For band steel temperature measurement roller and the temperature measurement data analytical procedure of rolling mill production line

Technical field

The present invention relates to a kind of band steel temperature measurement roller for rolling mill production line and temperature measurement data analytical procedure.

Background technology

In cold-rolling process, strip temperature control is a gordian technique, and it is directly connected to normally carrying out and quality product of production. for this reason whole bar rolling mill production line each critical process all arrange survey temperature point, be temperature controlling system provide determination data. comparatively general is adopt infrared hyperthermia radiation meter at present, and the band steel run at a high speed is carried out contactless temperature-measuring. but in actual production process, some external factor can cause hyperthermia radiation meter detected result inaccurate, mainly contain hyperthermia radiation meter and change in location is installed, the change etc. of instrument cooling system job insecurity and belt steel surface reflection coefficient (coefficient of blackness), particularly the change of belt steel surface reflection coefficient is dynamic, reflection coefficient and belt steel surface degree of cleaning, all multifactor direct correlation such as surfaceness and belt plate shape, therefore dynamic corrections hyperthermia radiation meter reflection coefficient is very difficult, and dynamic calibration cannot realize, with regard to causing, strip temperature control system adopts inaccurate measured temperature to control for this, quality product just cannot be protected.

For measuring belt steel temperature, also there is employing temperature measurement roller at rolling mill production line, owing to band steel is directly around, on temperature measurement roller, therefore, it is possible to directly measure belt steel temperature, obtaining belt steel temperature parameter more accurately. But there is more serious defect in tradition temperature measurement roller, being mainly manifested in it the same with traditional stove roller, adopt fully-closed welding, temperature measurement module is directly fixedly welded on stove roller inwall, can not dismantle, cannot safeguarding once temperature measurement module breaks down, temperature measurement roller will lose its temp sensing function, and therefore tradition temperature measurement roller belongs to disposable products, can not safeguard, thus improve production cost, add the workload of overhaul of the equipments, affect the normal operation of rolling mill production line.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of band steel temperature measurement roller for rolling mill production line and temperature measurement data analytical procedure, this temperature measurement roller can be applicable to all stove rollers on rolling mill production line, have transmission and temp sensing function concurrently, it is convenient to repair and maintenance, reduce production cost, reduce overhaul of the equipments workload, ensure that the normal operation of rolling mill production line; This analysis method avoids production scene other factors interference, it is achieved the temperature on strip width direction, the display of temperature difference curve, excessive temperature differentials are reported to the police and temperature additional stress monitor in real time.

For solving the problems of the technologies described above, the band steel temperature measurement roller that the present invention is used for rolling mill production line comprises inboardend transmission shaft, sliding end transmission shaft and the body of roll, also comprise some temperature measurement modules, some retaining collars, fixed flange, compress ring flange, front pressuring plate, rear pressing plate, terminal box, heat insulation tapetum fibrosum and conducting slip ring, described inboardend transmission shaft and sliding end transmission shaft are connected with form of flanges by bolt and steady brace and are positioned described body of roll two ends, described some temperature measurement modules at least become a straight line to be fixed on described body of roll inwall, described some retaining collars at least become a straight line to be fixed on described body of roll inwall and stagger successively at body of roll circumferential direction with described some temperature measurement modules, described fixed flange is located at described sliding end transmission shaft end, described sliding end transmission shaft end inner chamber is located at described front pressuring plate and rear pressing plate interval, described heat insulation tapetum fibrosum is filled in the cavity between described front pressuring plate and rear pressing plate, described compression ring flange is located at outside described fixed flange and against described rear pressing plate, described terminal box side is located at outside described compression ring flange, described conducting slip ring is located at another side of described terminal box, the compensating lead wire of described some temperature measurement modules passes described sliding end transmission shaft successively after described some retaining collars are fixing, front pressuring plate, rear pressing plate is connected in described terminal box, in described terminal box, compensating lead wire is connected to described conducting slip ring.

Further, above-mentioned temperature measurement module comprises thermopair, fixing cartridge, rotate cartridge, end card block and compression spring, described fixing cartridge is located at described body of roll inwall, described body of roll inwall is provided with blind hole in described fixing cartridge middle position, described rotation cartridge is sticked in described fixing cartridge, described compression spring and end card block are located in described rotation cartridge successively, described thermopair is arranged in described fixing cartridge and stretches into the blind hole of the described body of roll, described end card block is against described thermopair tail end, the compensating lead wire of described thermopair is drawn in described rotation cartridge.

Further, the blind hole aperture of above-mentioned body of roll inwall is 8-10mm, blind hole bottom hole pitch body surface is 2-4mm.

Further, above-mentioned fixing cartridge is provided with card groove, rotates cartridge and is provided with card base, and described fixing cartridge is closed by described card groove and card base revotating card with rotation cartridge.

The temperature measurement data analytical procedure of the band steel temperature measurement roller that the present invention is used for rolling mill production line comprises the steps:

Step one, measure each temperature measurement module coordinate respectively along roll body length direction, it is respectively X₁��X₂��X₃��X₄��X₅��X_n, the temperature value that each temperature measurement module records is respectively t₁��t₂��t₃��t₄��t₅��t_n, the difference of the temperature value that each temperature measurement module records and target temperature value T is respectively �� t₁����t₂����t₃����t₄����t₅����t_n;

The difference of step 2, the temperature value recorded by each temperature measurement module and target temperature value T makes fitting of a curve, obtains band steel and along the temperature profile function on width is:

T (x)=ax⁴+bx³+cx²+dx+e(1)

Obtaining band steel along the temperature difference distribution function on width is:

�� t (x)=a₁x⁴+b₁x³+c₁x²+d₁x+e₁(2)

In formula (1) and formula (2), a, b, c, d, e are the coefficient of temperature profile function after fitting of a curve, a₁��b₁��c₁��d₁��e₁For the coefficient of temperature difference distribution function after fitting of a curve, x is the coordinate on strip width direction;

Step 3, according to formula (1) and formula (2), in real time display and monitoring band steel are along the temperature variation of width and difference variation situation;

Step 4, setting maximum temperature difference alarming value ts, as max (t₁,t₂,...,t_n)-min(t₁,t₂,...,t_n)��t_sTime, strip temperature control system is reported to the police automatically;

Step 5, belt steel temperature additional stress are monitored, and the temperature additional stress curve that band steel transverse temperature produces is:

$\mathrm{\σ}\left(x\right)=\frac{\mathrm{\β}\·E\·(a_1{x}^4+b_1{x}^3+c_1{x}^2+d_{1}x+e_1)}{1.05}---\left(3\right)$

In formula (3), �� is additional temp stress (MPa), �� is the coefficient of linear expansion of band steel, and E is the Young's modulus of band steel,

Changing conditions according to the temperature additional stress on formula (3) monitor in real time strip width direction, control belt plate shape.

It is used for the band steel temperature measurement roller of rolling mill production line and temperature measurement data analytical procedure have employed technique scheme due to the present invention, namely the inboardend transmission shaft of this temperature measurement roller and sliding end transmission shaft connect body of roll two ends, some temperature measurement modules at least become a straight line to be fixed on body of roll inwall and stagger successively with some retaining collars, sliding end transmission shaft end is located at successively by fixed flange and compression ring flange, sliding end transmission shaft end inner chamber is located at pressing plate interval, front and back, heat insulation tapetum fibrosum is filled between the pressing plate of front and back, terminal box and conducting slip ring connect compression ring flange successively, the compensating lead wire of some temperature measurement modules is introduced in terminal box, in terminal box, compensating lead wire is connected to conducting slip ring. present method measures each temperature measurement module coordinate and temperature value, obtain the difference of actual temperature value and target temperature value, temperature profile function and temperature difference distribution function is obtained and the temperature of monitoring band steel and the temperature difference through fitting of a curve, report to the police when the temperature difference is greater than set(ting)value, and according to additional temp stress curve to the monitoring of belt steel temperature additional stress, control belt plate shape. this temperature measurement roller can be applicable to all stove rollers on rolling mill production line, has transmission and temp sensing function concurrently, is convenient to repair and maintenance, reduces production cost, reduces overhaul of the equipments workload, ensure that the normal operation of rolling mill production line, this analysis method avoids production scene other factors interference, it is achieved the temperature on strip width direction, the display of temperature difference curve, excessive temperature differentials are reported to the police and temperature additional stress monitor in real time.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the present invention is described in further detail:

Fig. 1 is the band steel temperature measurement roller structural representation of the present invention for rolling mill production line;

Fig. 2 is the A-A direction view of Fig. 1;

Fig. 3 is the B portion enlarged view of Fig. 1.

Embodiment

Such as Fig. 1, shown in Fig. 2 and Fig. 3, the band steel temperature measurement roller that the present invention is used for rolling mill production line comprises inboardend transmission shaft 1, sliding end transmission shaft 2 and the body of roll 3, inboardend transmission shaft 1 is for connection for transmission device, also comprise some temperature measurement modules 4, some retaining collars 5, fixed flange 6, compress ring flange 7, front pressuring plate 21, rear pressing plate 22, terminal box 8, heat insulation tapetum fibrosum 23 and conducting slip ring 9, described inboardend transmission shaft 1 and sliding end transmission shaft 2 are connected by bolt 11 and steady brace 12 with form of flanges and are positioned the described body of roll 3 two ends, steady brace 12 is for ensureing inboardend transmission shaft 1 and the concentricity requirement of sliding end transmission shaft 2 and the body of roll 3, steady brace 12 can adopt 2-3 depending on the body of roll 3 diameter, described some temperature measurement modules 4 at least become a straight line to be fixed on the described body of roll 3 inwall, described some retaining collars 5 at least become a straight line to be fixed on the described body of roll 3 inwall and stagger successively at the body of roll 3 circumferential direction with described some temperature measurement modules 4, described fixed flange 6 is located at described sliding end transmission shaft 2 axle head, described sliding end transmission shaft 2 axle head inner chamber is located at described front pressuring plate 21 and rear pressing plate 22 interval, described heat insulation tapetum fibrosum 23 is filled in the cavity between described front pressuring plate 21 and rear pressing plate 22, described compression ring flange 7 is located at outside described fixed flange 6 and against described rear pressing plate 22, by between front pressuring plate 21 and rear pressing plate 22 fill heat insulation tapetum fibrosum 23 and by compression ring flange 7 compress, prevent steam leakage in temperature measurement roller, improve temperature measurement accuracy, described terminal box 8 side is located at outside described compression ring flange 7, described conducting slip ring 9 is located at described another side of terminal box 8, the compensating lead wire 41 of described some temperature measurement modules 4 passes described sliding end transmission shaft 2 successively after described some retaining collars 5 are fixing, front pressuring plate 21, rear pressing plate 22 is connected in described terminal box 8, in described terminal box 8, compensating lead wire is connected to described conducting slip ring 9, by conducting slip ring 9 by the temperature Signal transmissions of each temperature measurement module 4 to temperature controlling system, reach the object of real time temperature measurement.

Further, above-mentioned temperature measurement module 4 comprises thermopair 42, fixing cartridge 43, rotate cartridge 44, end card block 45 and compression spring 46, described fixing cartridge 43 is located at the described body of roll 2 inwall, the described body of roll 2 inwall is provided with blind hole 31 in described fixing cartridge 43 middle position, described rotation cartridge 44 is sticked in described fixing cartridge 43, described compression spring 46 and end card block 45 are located in described rotation cartridge 44 successively, described thermopair 42 is arranged in described fixing cartridge 43 and stretches into the blind hole 31 of the described body of roll 3, described end card block 45 is against described thermopair 42 tail end, the compensating lead wire 41 of described thermopair 42 is drawn in described rotation cartridge 44. by compressing, spring 46 and end card block 45 are reliably fixed in the blind hole 31 of the body of roll 3 thermopair 42, loosen when preventing temperature measurement roller from rotating.

Further, blind hole 31 aperture of the above-mentioned body of roll 3 inwall be 8-10mm, the blind hole 31 bottom hole pitch body of roll 3 surface for 2-4mm, thus ensure that temperature value that thermopair 42 records is as far as possible close to belt steel surface temperature.

Further, above-mentioned fixing cartridge 43 is provided with card groove, rotates cartridge 44 and is provided with card base, and described fixing cartridge 43 is closed by described card groove and card base revotating card with rotation cartridge 44. When this structure makes thermopair 42 fault, after rotating cartridge 44 reverse rotation, depart from fixing cartridge 43, i.e. conveniently replaced thermopair 42, it is to increase the maintainability of temperature measurement roller.

The temperature measurement data analytical procedure of the band steel temperature measurement roller that the present invention is used for rolling mill production line comprises the steps:

Step one, measure each temperature measurement module coordinate respectively along roll body length direction, it is respectively X₁��X₂��X₃��X₄��X₅��X_n, the temperature value that each temperature measurement module records is respectively t₁��t₂��t₃��t₄��t₅��t_n, the difference of the temperature value that each temperature measurement module records and target temperature value T is respectively �� t₁����t₂����t₃����t₄����t₅����t_n;

The difference of step 2, the temperature value recorded by each temperature measurement module and target temperature value T makes fitting of a curve, obtains band steel and along the temperature profile function on width is:

T (x)=ax⁴+bx³+cx²+dx+e(1)

Obtaining band steel along the temperature difference distribution function on width is:

�� t (x)=a₁x⁴+b₁x³+c₁x²+d₁x+e₁(2)

In formula (1) and formula (2), a, b, c, d, e are the coefficient of temperature profile function after fitting of a curve, a₁��b₁��c₁��d₁��e₁For the coefficient of temperature difference distribution function after fitting of a curve, x is the coordinate on strip width direction;

Step 3, according to formula (1) and formula (2), in real time display and monitoring band steel are along the temperature variation of width and difference variation situation;

Step 4, setting maximum temperature difference alarming value ts, as max (t₁,t₂,...,t_n)-min(t₁,t₂,...,t_n)��t_sTime, strip temperature control system is reported to the police automatically; When excessive temperature differentials on strip width direction, band steel will be caused to occur, and uneven laterally heat extends, thus affects belt plate shape, even can produce the problem such as song, broken belt of wafing time serious, and therefore the temperature difference is greater than set(ting)value and reports to the police, and avoids the distortion of band steel excessive temperature differentials;

Step 5, belt steel temperature additional stress are monitored, and the temperature additional stress curve that band steel transverse temperature produces is:

$\mathrm{\σ}\left(x\right)=\frac{\mathrm{\β}\·E\·(a_1{x}^4+b_1{x}^3+c_1{x}^2+d_{1}x+e_1)}{1.05}---\left(3\right)$

In formula (3), �� is additional temp stress (MPa), �� is the coefficient of linear expansion of band steel, and E is the Young's modulus of band steel,

Owing to non-uniform temperature will produce temperature additional stress on strip width direction, when the temperature additional stress that certain is put has exceeded the yielding stress of band steel at the same temperature, band steel will produce thermal distortion at this point, therefore according to the changing conditions of the temperature additional stress on formula (3) monitor in real time strip width direction, control belt plate shape.

This temperature measurement roller overcomes the defect of traditional burner roller fully-closed, can be applicable to all stove rollers on rolling mill production line, have transmission and temp sensing function concurrently, the inboardend transmission shaft body of roll relative to sliding end transmission shaft is demountable structure, it is convenient to when in temperature measurement roller, temperature measurement module breaks down safeguard, temperature measurement module is reliably installed on body of roll inwall simultaneously, terminal box is caused after compensating lead wire is fixing by retaining collar, and by conducting slip ring, temperature measurement signal is transferred to temperature controlling system after being connected with signal conductor in terminal box, the temperature realizing strip width direction detects in real time, hot gas is avoided to scatter and disappear by the filling of heat insulation tapetum fibrosum, improve temperature measurement accuracy, the temperature measurement module that further temperature measurement roller inside is installed adopts rotary cartridge to design, when the thermopair of temperature measurement module needs to change, only rotation cartridge need to be pressed down and rotate, can be pulled down, implement the replacing of thermopair, improve the maintainability of temperature measurement roller. present method, according to the feature of temperature measurement roller, measures strip width direction temperature, thus realizes the temperature on strip width direction, the display of temperature difference curve, excessive temperature differentials warning and temperature additional stress monitor in real time, avoids the defect that temperature surveyed by traditional infrared hyperthermia radiation meter.

Claims (5)

1. the band steel temperature measurement roller for rolling mill production line, comprise inboardend transmission shaft, sliding end transmission shaft and the body of roll, it is characterized in that: also comprise some temperature measurement modules, some retaining collars, fixed flange, compress ring flange, front pressuring plate, rear pressing plate, terminal box, heat insulation tapetum fibrosum and conducting slip ring, described inboardend transmission shaft and sliding end transmission shaft are connected by bolt and steady brace with form of flanges and are positioned the two ends of the described body of roll, described some temperature measurement modules at least become a straight line to be fixed on body of roll inwall, described some retaining collars at least become a straight line to be fixed on body of roll inwall and stagger successively at body of roll circumferential direction with described some temperature measurement modules, described fixed flange is located at the axle head of described sliding end transmission shaft, the axle head inner chamber of described sliding end transmission shaft is located at described front pressuring plate and rear pressing plate interval, described heat insulation tapetum fibrosum is filled in the cavity between described front pressuring plate and rear pressing plate, described compression ring flange is located at outside described fixed flange and against described rear pressing plate, the outside of described compression ring flange is located in the side of described terminal box, described conducting slip ring is located at another side of described terminal box, the compensating lead wire of described some temperature measurement modules passes described sliding end transmission shaft successively after described some retaining collars are fixing, front pressuring plate, rear pressing plate is connected in described terminal box, in terminal box, compensating lead wire is connected to described conducting slip ring.

2. the band steel temperature measurement roller for rolling mill production line according to claim 1, it is characterized in that: described temperature measurement module comprises thermopair, fixing cartridge, rotate cartridge, end card block and compression spring, described fixing cartridge is located at described body of roll inwall, described body of roll inwall is provided with blind hole in described fixing cartridge middle position, described rotation cartridge is sticked in described fixing cartridge, described compression spring and end card block are located in described rotation cartridge successively, described thermopair is arranged in described fixing cartridge and stretches into the blind hole of the described body of roll, described end card block is against the tail end of described thermopair, the compensating lead wire of described thermopair is drawn in described rotation cartridge.

3. the band steel temperature measurement roller for rolling mill production line according to claim 2, it is characterised in that: the blind hole aperture of described body of roll inwall is 8-10mm, blind hole bottom hole pitch body surface is 2-4mm.

4. the band steel temperature measurement roller for rolling mill production line according to Claims 2 or 3, it is characterised in that: described fixing cartridge is provided with card groove, and described rotation cartridge is provided with card base, described fixing cartridge with rotating cartridge closed by described card groove and card base revotating card.

5. according to claim 1 for the temperature measurement data analytical procedure of band steel temperature measurement roller of rolling mill production line, it is characterised in that present method comprises the steps:

Step one, measure each temperature measurement module coordinate respectively along roll body length direction, it is respectively X₁��X₂��X₃��X₄��X₅��X_n, the temperature value that each temperature measurement module records is respectively t₁��t₂��t₃��t₄��t₅��t_n, the difference of the temperature value that each temperature measurement module records and target temperature value T is respectively �� t₁����t₂����t₃����t₄����t₅����t_n;

The difference of step 2, the temperature value recorded by each temperature measurement module and target temperature value T makes fitting of a curve, obtains band steel and along the temperature profile function on width is:

T (x)=ax⁴+bx³+cx²+dx+e(1)

Obtaining band steel along the temperature difference distribution function on width is:

�� t (x)=a₁x⁴+b₁x³+c₁x²+d₁x+e₁(2)

In formula (1) and formula (2), a, b, c, d, e are the coefficient of temperature profile function after fitting of a curve, a₁��b₁��c₁��d₁��e₁For the coefficient of temperature difference distribution function after fitting of a curve, x is the coordinate on strip width direction;

Step 3, according to formula (1) and formula (2), in real time display and monitoring band steel are along the temperature variation of width and difference variation situation;

Step 4, setting maximum temperature difference alarming value t_s, as max (t₁,t₂,...,t_n)-min(t₁,t₂,...,t_n)��t_sTime, strip temperature control system is reported to the police automatically;

Step 5, belt steel temperature additional stress are monitored, and the temperature additional stress curve that band steel transverse temperature produces is:

$\mathrm{\σ}\left(x\right)=\frac{\mathrm{\β}\·E\·(a_1{x}^4+b_1{x}^3+c_1{x}^2+d_{1}x+e_1)}{1.05}---\left(3\right)$

In formula (3), �� is additional temp stress (MPa), �� is the coefficient of linear expansion of band steel, and E is the Young's modulus of band steel,

Changing conditions according to the temperature additional stress on formula (3) monitor in real time strip width direction, control belt plate shape.