GB1576309A - Temperature monitoring apparatus - Google Patents
Temperature monitoring apparatus Download PDFInfo
- Publication number
- GB1576309A GB1576309A GB3338576A GB3338576A GB1576309A GB 1576309 A GB1576309 A GB 1576309A GB 3338576 A GB3338576 A GB 3338576A GB 3338576 A GB3338576 A GB 3338576A GB 1576309 A GB1576309 A GB 1576309A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature sensing
- strip
- sensing means
- pyrometer
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000012544 monitoring process Methods 0.000 title claims description 19
- 238000001816 cooling Methods 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000012809 cooling fluid Substances 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/26—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a permeability varying with temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
(54) TEMPERATURE MONITORING APPARATUS
(71) We, BIRLEC LIMITED, of Westgate, Aldridge, Nr. Walsall, Staffordshire, a British Company, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: - This invention relates to temperature monitoring apparatus and has an important application to apparatus for monitoring the temperature of strip material.
According to the present invention temperature monitoring apparatus for monitoring the temperature of strip material movable through a zone, of a treatment chamber comprises temperature sensing means mounted on a support, means for moving the support to cause the temperature sensing means to reciprocate along a predetermined linear path which extends across the treatment chamber transverse to the direction of movement of the strip material as the latter passes through said zone, and including means for the withdrawal of the temperature sensing means through a gap in the side wall of the chamber, and means for closing the gap to retain the atmosphere within the treatment chamber, the output of the temperature sensing means providing an output signal or signals indicative of the temperature of the strip material sensed at different posiions along said path, and means for heating or cooling respective longitudinally extending portions of the moving strip material in response to the output signal or signals.
Preferably the temperature sensing means is a pyrometer and may be of the optical, two-colour or total radiation type.
The length of the path traversed by the temperature sensing means may be variable, and the speed of movement of the temperature sensing means may also be variable with respect to time and with respect to the position of the temperature sensing means along the path. The temperature sensing means may be arranged to dwell at predetermined positions along said path, and to generate signals indicative of the temperature sensed at said positions.
The means for reciprocating the temperature sensing means may comprise a rack and pinion arrangement driven by an electric motor, or may comprise a hydraulic or pneumatic piston or an electromechanical arrangement.
The means for heating or cooling the strip material may be provided by a plurality of heating or cooling devices disposed across the path of the strip material upstream of the path traversed by the temperature sensing means.
For example where the apparatus is used in combination with means for cooling heated strip material, the chamber through which the strip material is arranged to be fed may incorporate a plurality of cooling tubes extending lengthwise along the path of movment of the strip upstream of the path traversed by the temperature sensing means, and arranged to be supplied with cooling fluid, and control valves for controlling the flow of fluid through the individual cooling tubes in response to signals generated by the temperature sensing means at corrseponding positions across the width of the strip.
Alternatively the chamber may have duct means for the passage of cooling fluid located on both sides of the strip material upstream of the path traversed by the temperature sensing means, a multiplicity of movable radiation shields disposed across the width of the strip material on each side thereof between the surfaces of the strip material and said duct means, and means for adjusting the positions of the radiation shields in response to signals generated by the temperature sensing means at corresponding positions across the width of the strip.
The walls of the chamber may be hollow, the duct means being provided by the spaces between the hollow walls. In such a case the hollow walls may extend completely around the chamber and the baffles may be arranged in a substantially hollow rectangular formation surrounding the strip.
Two temperature sensing means may in some cases be used, each arranged to be moved to and fro along a linear path traversing a respective half the width of the strip material. The temperature sensing means may also be arranged to operate in conjunction with a multiplicity of subsidiary temperature sensing means located at predetermined fixed positions across the zone, and the signal from the first said (main) temperature sensing means used to provide a check on the calibration of the snubsidiary temperature sensing means.
The invention will now be described, by way of example, with reference to the drawings accompanying the Provisional
Specification in which: Figure 1 is a sectional end elevation of a heat treatment apparatus incorporating a temperature monitoring apparatus in accordance with the invenion;
Figure 2 is a sectional end elevation of the heat treatment apparatus shown in
Figure 1, taken upstream of the temperature monitoring apparatus and showing a differential cooling arrangement controlled by the temperature monitoring apparatus; and
Figures 3 to 5 are sectional end elevations similar to Figure 2 but showing other forms of differential cooling arrangement.
Referring in the first instance to Figure 1, the heat treatment apparatus comprises a main chamber 1 which is substantially rectangular in cross-section and has side walls 2 and 3 and a hearth 4 of a refractory material. The upper end of the chamber 1 is closed by a detachable roof 5 which is also of a refractory material and can be removed to give access to the upper part 6 of the chamber 1. A strip 7 of a material which is to be treated in the chamber 1 is supported for longitudinal movement through the chamber 1 by pairs of rollers or other suitable supporting means (not shown).
Located within the upper part 6 of the chamber 1 is a temperature monitoring apparatus in accordance with the invention comprising a pyrometer 10 arranged for reciprocating movement along a linear path between two positions indicated respectively by chain dotted outlines 11 and 12. To this end the pyrometer 10 which may, for example, be of the optical, two-colour or total radiation type, is mounted on one end of a wheeled bogie 13 arranged to run on a horizontal track 14 extending across the chamber 1 above abutments 15 on the side walls 2 and 3. The extent of the travel of the pyrometer 10 between the two positions 11 and 12 is arranged to cater for strips 7 of different widths and to extend just beyond the edges 16 of the widest strip to be treated in the chamber 1.The pyrometer
10 is also arranged to be withdrawn from the furnace into an antechamber 17 to enable replacement or servicing to be carried out. To this end a further track 18 on which the bogie 13 can run extends into the antechamber 17. A gap 19 in the side wall 3 where the tracks 14 and 18 approach one another is arranged to be sealed by a retractable shutter 20.
The bogie 13 is arranged to be moved to and fro by an overhead rack and pinion arrangement 21 which is driven by an electric motor (not shown). The rack and pinion arrangement 21 is adapted so that the speed of the traverse of the pyrometer 10 betwen the two positions 11 and 12 is variable with respect to time and position, and so that the pyrometer 10 can dwell at one or more predetermined positions. Other forms of driving arrangement for the bogie 13 may be used, for example, a hydraulic or a pneumatic piston or an electromechanical driving arrangement.The pyrometer 10 is provided with a cooling system and a flexible duct 22 extending between the pyrometer 10 and an inlet 23 in the end wall of the antechamber 17 is arranged to carry pipes which convey cooling fluid to and from the pyrometer and also to carry an electric cable conveying energising current to, and output signals from, the pyrometer 10.
In use of the temperature monitoring arrangement the strip 7 is passed through the chamber 1 which contains a suitable atmosphere and the pyrometer 10 is traversed to and fro across the width of the strip 7 between positions 11 and 12 to provide an output signal indicative of the changes in temperature monitored during each traverse. In the most simple application the output signal from the pyrometer 10 is utilized to provide a record of any variation in temperature across the width of the strip 7 and/or of any variation of the position of the strip in the chamber 1. The output signal from the pyrometer 10 may also be used to control the position of the strip 7 in the chamber 1 or to control the tension of the strip 7, since variations in temperature across the strip are indicative of varying degrees of stress, and hence of strip tension. The output signal may also be arranged to activate an audible or visual alarm if the tension or position of the strip 7'departs from predetermined parameters.
In a more elaborate arrangement the output signal from the pyrometer 10 is used to control the temperature of the strip material. As shown in Figure 2 the chamber 1 is provided, upstream of the temperature monitoring arrangement, with a multiplicity of cooling tubes 30 extending lengthwise along the strip 7 at positions above and below the strip 7. The cooling tubes30 above and below the strip 7 are supplied with cooling fluid, for example water, from common inlet pipes 31 by way of individual control valves 32. The cooling fluid is discharged from the cooling tubes 30 above and below the strip 7 through respective outlet pipes 33 which may be connected to, a heat exchanger (not shown) arranged to re-circulate the cooling fluid.
In use of the heat treatment apparatus the output signals from the pyrometer 10 are used to adjust the settings of the con trdl valves 32 to vary the flow of cooling fluid through individual cooling tubes 30 in accordance with the temperatures monitored at corresponding positions across the width of the strip 7. Thus the intensity of the cooling produced at different positions across the width of the strip 7 can be varied in accordance with the temperatures monitored at corresponding positions.
In another cooling arrnagement shown in Figure 3, cooling fluid is circulated through hollow walls of the chamber 1 which acts as a radiant heat sink. Cooling fluid is admitted to the hollow walls through an inlet pipe 35 and is discharged through an outlet pipe 36. Arranged in a substantially hollow rectangular formation, surrounding the strip 7, is a multiplicity of rotatably mounted radiation shields 37 which can be controlled individually or in groups by the signals from the pyrometer 10. By varying the angles to which the radiation shields 37 are set the cooling producked at different positions across the width of the strip 7 can be varied in accordance with the temperatures monitored at corresponding positions.
In a further cooling arrangement shown in Figure 4 the chamber 1 is provided, upstream of the temperature monitoring arrangement, with a multiplicity of cooling tubes 40 extending lengthwise along the strip 7 at positions' above and below the strip. The cooling tubes 40 above and below the strip 7 are supplied with cooling fluid from common inlet pipes 41 by way of individual control valves 42. The cooling fluid is discharged from the cooling tubes 40 above and below the strip 7 through respective outlet pipes s 43.
Above and below the strip 7 at each longitudinal edge thereof are located radiation baffles 44 of heat reflective material.
Each baffle 44 is arranged to be moved by an actuating arrangement 45 so that the baffle 44 is interposed between the strip 7 and one or more of the cooling tubes 40 or is withdrawn from the space between the strip 7 and the cooling tubes 40. In this way the baffles 44 can be positioned to reduce the cooling produced by selected ones of the cooling tubes at different positions across the width of the strip.
In use of the heat treatment apparatus the output signals from the pyrometer 10 are used to adjust the positions of the baffles 44 in accordance with the temperatures monitored at corresponding positions across the width of the strip 7. The output signals from the pyrometer 10 may also be used to adjust the settings of the control valves 42 to vary the flow of fluid through individual cooling tubes 40 in accordance with the temperature monitored at corresponding positions across the width of the strip 7.
In yet another cooling arrangement shown in Figure 5 the chamber 1 incorporates a multiplicity of ducts 50 which extend substantially normal to the upper and lower surfaces of the strip 7, upstream of the temperature monitoring arrangement, and terminate in walls 51 which extend parallel to the upper and lower surfaces of the strip and are provided with apertures 52. A cooling fluid in the form of a gas is supplied to the ducts 50 through inlet pipes 53 so as to be discharged on to the surfaces of the strip through the apertures 52, finally being exepelled from the space between the walls 51 through an outlet pipe 54. A baffle 55 is rotatably mounted in each of the ducts 50 so as to control the flow of gas to the apertures 52.
In use of the heat treatment apparatus the output signals from the pyrometer are used to adjust the settings of the rotatable baffles 55 to vary the flow of cooling gas through individual ducts 50 in accordance with the temperatures monitored by the pyrometer. The gas passing through the ducts 50 emerges from the apertures 52 as a multiplicity of jets which impinge on different regions of the upper and lower surfaces of the strip 7to produce cooling at different positions across the width of the strip which varies in accordance with the temperatures monitored at corresponding positions.
In a modification of the invention which is not illustrated, the pyrometer may be arranged to operate iri conjunction with a multiplicity of fixed-position pyrometers spaced apart across the width of the chamber, the signal from the traversing pyrometer being -used to check the calibration of the fixed-position' pyrometers thereby eliminating differential instrument errors.
Signals provided by the fixed-position pyrometers are then used to control heating or cooling devices at positions corresponding to those of the fixed-position pyrometers.
Although in the embodiment of the invention described above a single traversing pyrometer 10 is used to monitor the temperature across the whole width of the strip material 7, in other embodiments of the invention two pyrometers may be used, each arranged to traverse slightly more than half the width of the strip material.
The output signals from each traversing pyrometer would then be utilized to control operations pertaining to the corresponding part of the strip material. It will be appreciated that more than two pyrometers, each arranged to traverse a respective part of the width of the strip, could also be used in some cases, depending upon the overall strip width.
WHAT WE CLAIM IS: - 1. A temperature monitoring apparatus for monitoring the temperature of strip material movable through a zone of a treatment chamber, incorporating temperature sensing means mounted on a support, means for moving the support to cause the temperature sensing means to recipro
cate along a predetermined linear path which extends across the treatment chamber transverse to the direction of movement of the strip material as the latter
passes through said zone, and including means for the withdrawal of the temperature sensing means through a gap in the side wall of the chamber, and means for closing the gap to retain the atmosphere within the treatment chamber, the output
of the temperature sensing means providing an output signal or signals indicative of the temperature of the strip material sensed at different positions along said path, and means for heating or cooling respective longitudinally extending portions of the moving strip material in response to the output signal or signals.
2. Apparatus according to Claim 1 wherein the temperature sensing means is a pyrometer.
3. Apparatus according to Claim 2 wherein the pyrometer is an optical pyrometer.
4. Apparatus according to Claim 2 wherein the pyrometer is a two-colour pyrometer.
5. Apparatus according to Claim 2 wherein the pyrometer is a total radiation type of pyrometer.
6. Apparatus according to any preceding claim wherein means are provided for varying the length of the path traversed by the temperature sensing means.
7; Apparatus according to any -preceding claim including means for varying the speed of movement of the temperature sensing means along its path of movement.
8. Apparatus according to Claim 7 wherein the speed of movement of the temperature sensing means along said path is variable with respect to time.
9. Apparatus according to Claim 7 wherein the speed of movement of the temperature sensing means is variable with respect to its position along said path.
10. Apparatus according to Claim 7 wherein the temperature sensing means is arranged to dwell at predetermined positions along its path of movement, and is arranged to generate signals indicative of the temperature sensed at said positions.
11. Apparatus according to any preceding claim wherein the means for reciprocating the temperature sensing means comprises a rack and pinion arrangement driven by an electric motor or a hydraulic or pneumatic piston.
12. Apparatus according to any preceding claim wherein the means for heating or cooling the strap material is provided by a plurality of heating or cooling devices disposed across the path of the strip material upstream of the path traversed by the temperature sensing means.
13. Apparatus according to any preceding claim including two temperature sensing means, each movable to and fro along a linear path traversing a respective half
of the width of the strip material.
14. Apparatus according to any preceding claim including a plurality of subsidiary temperature sensing means located at fixed positions across the zone, the signal from the main temperature sensing means providing a check on the calibration of the subsidiary temperature sensing means.
15. Apparatus according to Claim 16 wherein the temperature sensitive means is withdrawable into an ante-chamber disposed at the side of the treatment chamber.
16. Apparatus according to any preceding claim including means for disconnecting the temperature sensitive means from and reconnecting it to associated equipment, whilst withdrawn from the treatment chamber, for replacement or servicing.
17. Apparatus according to Claim 12 in which the treatment chamber incorporates a plurality of cooling tubes extending lengthwise along the path of movement of the strip and arranged to be supplied with cooling fluid, and control valves for controlling the flow of fluid through the individual cooling tubes in response to signals generated by the temperature sensing means at corresponding positions across the width of the strip.
18. Apparatus according to Claim 12 in which the treatment chamber has duct
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (22)
1. A temperature monitoring apparatus for monitoring the temperature of strip material movable through a zone of a treatment chamber, incorporating temperature sensing means mounted on a support, means for moving the support to cause the temperature sensing means to recipro
cate along a predetermined linear path which extends across the treatment chamber transverse to the direction of movement of the strip material as the latter
passes through said zone, and including means for the withdrawal of the temperature sensing means through a gap in the side wall of the chamber, and means for closing the gap to retain the atmosphere within the treatment chamber, the output
of the temperature sensing means providing an output signal or signals indicative of the temperature of the strip material sensed at different positions along said path, and means for heating or cooling respective longitudinally extending portions of the moving strip material in response to the output signal or signals.
2. Apparatus according to Claim 1 wherein the temperature sensing means is a pyrometer.
3. Apparatus according to Claim 2 wherein the pyrometer is an optical pyrometer.
4. Apparatus according to Claim 2 wherein the pyrometer is a two-colour pyrometer.
5. Apparatus according to Claim 2 wherein the pyrometer is a total radiation type of pyrometer.
6. Apparatus according to any preceding claim wherein means are provided for varying the length of the path traversed by the temperature sensing means.
7; Apparatus according to any -preceding claim including means for varying the speed of movement of the temperature sensing means along its path of movement.
8. Apparatus according to Claim 7 wherein the speed of movement of the temperature sensing means along said path is variable with respect to time.
9. Apparatus according to Claim 7 wherein the speed of movement of the temperature sensing means is variable with respect to its position along said path.
10. Apparatus according to Claim 7 wherein the temperature sensing means is arranged to dwell at predetermined positions along its path of movement, and is arranged to generate signals indicative of the temperature sensed at said positions.
11. Apparatus according to any preceding claim wherein the means for reciprocating the temperature sensing means comprises a rack and pinion arrangement driven by an electric motor or a hydraulic or pneumatic piston.
12. Apparatus according to any preceding claim wherein the means for heating or cooling the strap material is provided by a plurality of heating or cooling devices disposed across the path of the strip material upstream of the path traversed by the temperature sensing means.
13. Apparatus according to any preceding claim including two temperature sensing means, each movable to and fro along a linear path traversing a respective half
of the width of the strip material.
14. Apparatus according to any preceding claim including a plurality of subsidiary temperature sensing means located at fixed positions across the zone, the signal from the main temperature sensing means providing a check on the calibration of the subsidiary temperature sensing means.
15. Apparatus according to Claim 16 wherein the temperature sensitive means is withdrawable into an ante-chamber disposed at the side of the treatment chamber.
16. Apparatus according to any preceding claim including means for disconnecting the temperature sensitive means from and reconnecting it to associated equipment, whilst withdrawn from the treatment chamber, for replacement or servicing.
17. Apparatus according to Claim 12 in which the treatment chamber incorporates a plurality of cooling tubes extending lengthwise along the path of movement of the strip and arranged to be supplied with cooling fluid, and control valves for controlling the flow of fluid through the individual cooling tubes in response to signals generated by the temperature sensing means at corresponding positions across the width of the strip.
18. Apparatus according to Claim 12 in which the treatment chamber has duct
means for the passage of cooling fluid located on both sides of the strip material, a multiplicity of movable radiation shields disposed across the width of the strip on each side of the strip between the surfaces of the strip material and said duct means, and means for adjusting the positions of the radiation shields in response to signals generated by the temperature sensing means at corresponding positions across the width of the strip.
19. Apparatus according to Claim 18 wherein the walls of the chamber are hollow, and the duct means is provided by the spaces between the hollow walls.
20. Apparatus according to Claim 18 wherein the duct means are provided by a multiplicity of cooling tubes extending lengthwise along the strip on each side of the strip.
21. Apparatus according to Claim 12 in which the treatment chamber incorporates a plurality of ducts disposed across the width of the strip material on each side thereof and arranged to discharge cooling fluid on to the surface of the strip material, and flow control means for individually controlling the flow of fluid through the ducts, said flow control means being adjustable in response to signals generated by the temperature sensing means at corresponding positions across the width of the strip.
22. A temperature monitoring apparaus substantially as shown in and as hereinbefore described with reference to Figures 1 and 2, or Figures 3 or Figure 4 or
Figure 5 of the drawings accompanying the
Provisional Specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3338576A GB1576309A (en) | 1977-05-18 | 1977-05-18 | Temperature monitoring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3338576A GB1576309A (en) | 1977-05-18 | 1977-05-18 | Temperature monitoring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1576309A true GB1576309A (en) | 1980-10-08 |
Family
ID=10352259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3338576A Expired GB1576309A (en) | 1977-05-18 | 1977-05-18 | Temperature monitoring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1576309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19963185A1 (en) * | 1999-12-27 | 2001-07-12 | Siemens Ag | Method and device for cooling a hot-rolled metal strip emerging from a roll stand |
-
1977
- 1977-05-18 GB GB3338576A patent/GB1576309A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19963185A1 (en) * | 1999-12-27 | 2001-07-12 | Siemens Ag | Method and device for cooling a hot-rolled metal strip emerging from a roll stand |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4153236A (en) | Preheating furnace | |
| KR20020010577A (en) | A method of heating metal strip and apparatus therefor | |
| SE9200992L (en) | Chilled support roll | |
| RU94016952A (en) | Method and apparatus for cooling metallic strip | |
| US4318534A (en) | Plate quench | |
| US4054276A (en) | Process and apparatus for cooling hot rolled steel rod | |
| US4333777A (en) | Method and apparatus for compensating for local temperature difference of steel product | |
| US6129258A (en) | Muffle convection brazing and annealing system and method | |
| GB1505464A (en) | Method and apparatus for fabricating heatreflecting glass | |
| EP0110652B1 (en) | Apparatus and methods for rolling and treating steel rod | |
| GB1576309A (en) | Temperature monitoring apparatus | |
| US2965368A (en) | Wire treating apparatus | |
| US3291465A (en) | Furnace and burner arrangement for heating steel slabs | |
| US4439142A (en) | Cooling zone for a firing kiln with transport rollers | |
| US4580353A (en) | Apparatus and method for air cooling hot rolled steel rod | |
| US4546957A (en) | Apparatus for combined hot rolling and treating steel rod | |
| US3367804A (en) | Method and apparatus for quenching | |
| US3801265A (en) | Furnace and cooling control therefor | |
| US3290026A (en) | Heating means for strip material | |
| US3565409A (en) | Heat-treating apparatus | |
| JPH0810821A (en) | Device for cooling hot plate | |
| US2367429A (en) | Conveyer furnace | |
| US3263738A (en) | Process for controlling the cooling process in a tunnel furnace | |
| JPH0117072B2 (en) | ||
| SU1211571A1 (en) | Continuous convection heating furnace with lateral circulation of heat-transfer agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |