CN2188439Y

CN2188439Y - On-line measuring device for inner temperature of continuous casting stock

Info

Publication number: CN2188439Y
Application number: CN 94202652
Authority: CN
Inventors: 张炯明
Original assignee: Research Institute Of Steel Of Anshan Iron And Steel Co; Angang Steel Co Ltd
Current assignee: Research Institute Of Steel Of Anshan Iron And Steel Co; Angang Steel Co Ltd
Priority date: 1993-11-15
Filing date: 1994-01-29
Publication date: 1995-02-01
Anticipated expiration: 2004-01-29

Abstract

The utility model relates to an on-line measuring device for the inner temperature of continuous casting blanks, which comprises an armored thermocouple. The utility model is characterized in that the armored thermocouple (1) is fixed on a frame (3) whose appearance is similar to the shape of the inner hole of a casting blank crystallizer (4); the frame (3) and the casting blank crystallizer (4) can be matched in a movable fit way. The length of the armored thermocouple is between 600 mm to 1000 mm; the diameter of the armored thermocouple is between phi 5 mm to phi 8 mm; the temperature measuring ends A of the bottom part of the armored thermocouple are arranged in the same plane. The utility model has the advantages of simple structure and accurate and visual temperature measuring, and can accurately measure the changes temperature in the casting blank in the process of the continuous casting.

Description

On-line measuring device for inner temperature of continuous casting stock

The on-line measurement device of continuous casting billet internal temperature relates to the continuous casting steel billet field, is applicable to the measurement to its internal temperature in the continuous casting steel billet process of setting.

At present, measure the continuous casting steel billet temperature, generally adopt radiation pyrometer.Certain distance on distance continuous casting steel billet surface is installed a radiation pyrometer, and it demonstrates the temperature of billet surface by receiving the thermal-radiating energy of casting billet surface.The weak point of utilizing the radiation pyrometer thermometric is the approximation that can only record casting blank surface temperature, because the intermediate medium dust at thermometric scene and water smoke are difficult to control, casting billet surface is surrounded by one deck iron scale again, so the casting blank surface temperature that records actual temperature surperficial with it differs greatly, more be difficult to accurately measure the strand internal temperature.

The deficiency that the purpose of the on-line measurement device of the utility model continuous casting billet internal temperature is measured continuous casting billet skin temperature at radiation pyrometer designs, and this device can be measured one time of temperature Changing Pattern in continuous casting billet internal temperature and the continuous casting billet solidification processing exactly.

Structure of the present utility model is to form like this, it comprises armoured thermocouple (1), characteristics are that armoured thermocouple (1) is fixed on the framework (3) that has handle (2), the profile of framework (3) is similar to the interior hole shape of casting blank crystallizer (4), can be movingly each other and match, the length of armoured thermocouple (1) is 600～1000mm, and diameter is φ 5～φ 8mm, and its bottom thermometric end A is distributed on the same horizontal plane.

With drawings and Examples the utility model is described in further detail below.

Fig. 1 is the structural representation of the on-line measurement device of continuous casting billet internal temperature.

Fig. 2 is the main TV structure schematic diagram that the utility model inserts continuous casting mold.

Fig. 3 is the structural representation of armoured thermocouple.

The on-line measurement device of continuous casting billet internal temperature comprises armoured thermocouple (1), characteristics are that armoured thermocouple (1) is fixed on the framework (3) that has handle (2), the profile of framework (3) is similar to the interior hole shape of casting blank crystallizer (4), can be movingly each other and match, the length of armoured thermocouple (1) is 600～1000mm, diameter is φ 5～φ 8mm, and its bottom thermometric end A is distributed on the same horizontal plane.

Its another one characteristics are that the framework (3) that has handle (2) is square frame shape, and appearance and size is 142 * 142 * 142mm ³The arm of angle BC that three armoured thermocouples (1) vertically are fixed on square frame (3) respectively goes up, center line DE and with the center line FG of this arm of angle BC opposed side edges on, the endoporus fit clearance of the appearance and size of square frame (3) and casting blank crystallizer (4) is 3mm, the length of armoured thermocouple (1) and equal diameters respectively are 800mm, and diameter is φ 7mm.

The method that adopts the utility model to measure the continuous casting billet internal temperature is: when the cast continuous casting billet will finish, hand-held handle (2) inserts crystallizer (4) to the square bearer that armoured thermocouple (1) is installed (3) and imbeds in the strand molten steel liquid, continue then to pour into a mould about 6 seconds, make the end A of armoured thermocouple (1) imbed the about 600mm of strand (liquid), expose the about 200mm of strand (liquid) above, block sprue gate, stop cast, make it with strand to the lower edge arrow direction, the measured temperature of the end A of armoured thermocouple (1) is by connecting the concrete numeral that compensating wire (5) is sent into multi-route measuring temperature table (6) and demonstrated observed temperature.Because armoured thermocouple (1) is that the continuously and smoothly is to the lower edge arrow direction, so can read temperature one time graph of armoured thermocouple (1) end A or temperature one geometric locus from multi-route measuring temperature table (6) in company with continuous casting billet.

Armoured thermocouple (1) must have certain counter-bending deformability, this is because in company with the armoured thermocouple (1) in square bearer (3) the insertion strand, crooked in company with the motion of strand camber, do not break for guaranteeing that armoured thermocouple (1) is crooked, this just requires it must have certain non-deformability.

It is in the φ 9mm heat resisting pipe (8) that the tungsten-rhenium wire of φ 0.5mm (7) is inserted diameter, the middle magnesia insulator (9) of filling, on drawbench it is drawn into the armoured thermocouple that diameter is φ 7mm (1) then, armoured thermocouple at this moment (1) has increased non-deformability.Should do armoured thermocouple (1) carefully as far as possible, reduce the influence of measured object is improved temperature measurement accuracy with the thermal capacity that reduces measuring cell, square bearer (3) is that the reinforcing bar by φ 10mm is welded, the profile of square bearer (3) is similar to the interior hole shape of casting blank crystallizer (4), and the purpose that is each other movingly is to be as the criterion to guarantee that square bearer (3) can successfully insert in the crystallizer (4).Armoured thermocouple (1) is that spot-welded on is on square bearer (3).The degree of depth that armoured thermocouple (1) inserts strand should be not less than 600mm, because moment stops cast when inserting, there are the temperature difference in the molten steel temperature and the strand of crystallizer porch than the depths, surface temperature often is lower than the depths temperature, so inserting too shallow, measured temperature may be on the low side and temperature when represent normal the cast.The framework of present embodiment (3) adopts square frame, also can select cuboid or body framework such as cylindrical for use according to the interior hole shape of crystallizer, and armoured thermocouple (1) selects for use three to fix on it, also can select a plurality of fixing on it for use.

Because the water spray cooling effect of sparge pipe (11) forms solidified shell (10), the strand camber line shape under the supporting of nip rolls (12) that is made of liquid core (13) and solidified shell (10) is moved at the uniform velocity continuously along the direction of arrow on the section circumference of liquid core of continuous casting billet (13).

The utility model is simple in structure, and thermometric is accurate and visual, uses the temperature that it can accurately measure strand interior change in the casting process.

Claims

1, the on-line measurement device of continuous casting billet internal temperature comprises armoured thermocouple (1), it is characterized in that armoured thermocouple (1) is fixed on the framework (3) that has handle (2), the profile of framework (3) is similar to the interior hole shape that the strand crystallization is put, can be movingly each other and match, the length of armoured thermocouple (1) is 600～1000mm, diameter is Φ 5～Φ 8mm, and its bottom thermometric end A is distributed on the same horizontal plane.

2, on-line measurement device as claimed in claim 1, the framework (3) that it is characterized in that having handle (2) is square frame shape, appearance and size is 142 * 142 * 142mm ³Three armoured thermocouples (1) vertically be fixed on respectively square frame (3) arm of angle BC, center line DE and with the center line FG of this arm of angle BC opposed side edges on, the endoporus fit clearance of the appearance and size of framework (3) and casting blank crystallizer (4) is 3mm, the length of armoured thermocouple (1) is 800mm, and diameter is φ 7mm