KR20140085976A - Apparatus for measuring temperature of molten steel of turndish - Google Patents

Abstract

According to an embodiment of the present invention, an apparatus for measuring the temperature of molten steel in a turndish comprises: a thermocouple measuring the temperature of molten steel stored in a turndish; a fireproof material having the thermocouple inserted thereinto; a temperature measuring head which grips the thermocouple and the fireproof material; a supporting arm which is connected with the temperature measuring head and supports the temperature measuring head; a supporting rod which stands and is installed on one side of the turndish and is connected with the supporting arm; a lifting unit lifting the supporting arm along the supporting rod; a base connected on a lower part of the supporting rod; and a rotating unit rotating the base. The temperature-measuring head includes: a housing which has an open upper part and a movable groove vertically cut on a side surface thereof; and an upper supporting plate and a lower supporting plate which are installed in the housing, vertically arranged apart from each other, and have an upper through hole into which the thermocouple is inserted and a lower through hole into which the fireproof material is inserted, respectively. The upper and lower supporting plates additionally include an upper moving slot and a lower moving slot communicating with the upper and lower through holes and the movable groove to provide a movement passage of the thermocouple.

Description

[0001] APPARATUS FOR MEASURING TEMPERATURE OF MOLTEN STEEL OF TURNDISH [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature measuring apparatus, and more particularly, to a temperature measuring apparatus for molten steel stored in a tundish.

During the continuous casting process of the steelworks, the tundish is installed on the top of the continuous casting machine, and the molten steel is filled in the tundish. It is necessary to measure the temperature of the molten steel quickly and safely, and the molten steel temperature measuring device needs to measure the temperature of the molten steel quickly and safely.

Conventionally, a worker has to manually insert a thermocouple into or out of a tundish to measure the temperature of molten steel. In addition to this, there is a possibility that a safety problem may occur during a work. In addition, there is no special fastener when a thermocouple is inserted. . ≪ / RTI > Therefore, it is difficult to measure the temperature of the molten steel safely and accurately.

In addition, when measuring the temperature of the molten steel for a long time, the extension cable connected to the thermocouple is twisted or impacted, and the internal wire short-circuiting occurs.

Korean Registered Patent Publication No. 0843937 Published June 27, 2008

It is an object of the present invention to provide a molten steel temperature measuring apparatus capable of measuring the temperature of molten steel stored in a tundish.

Another object of the present invention is to provide a molten steel temperature measuring apparatus capable of easily detaching and attaching a thermocouple.

It is still another object of the present invention to provide a molten steel temperature measuring apparatus capable of wirelessly transmitting the temperature of molten steel measured through a thermocouple.

Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to an embodiment of the present invention, a molten steel temperature measuring apparatus of a tundish includes: a thermocouple for measuring a temperature of molten steel stored in a tundish; A refractory material into which the thermocouple is inserted; A thermocouple and a thermocouple holding the refractory material; A support arm connected to the temperature measurement head to support the temperature measurement head; A support rod installed on one side of the tundish and to which the support arm is connected; A lifting and guiding unit for lifting the support arm along the support rod; A base connected to a lower portion of the support rod; And a rotation driving unit for rotationally driving the base, wherein the temperature-measuring head includes: a housing having an upper opening and a moving groove cut along a vertical direction of a side surface; And an upper support plate and a lower support plate each having an upper through hole for inserting the thermocouple and a lower through hole for inserting the refractory material, the upper support plate and the lower support plate being disposed inside the housing and spaced apart from each other in the vertical direction, Further comprises an upper moving slot and a lower moving slot which provide the moving passage of the thermocouple through the upper through hole and the lower through hole and the moving groove, respectively.

The molten steel temperature measuring apparatus may further include a support member installed on the upper support plate and holding the thermocouple.

The housing has an insertion slot formed on a side surface thereof and disposed between the upper support plate and the lower support plate. The molten steel temperature-measuring device further includes a U-shaped fixed block inserted into the insertion slot to support the refractory .

The housing has a guide slot parallel to the insertion direction of the fixing member, and the fixing member is fixed to one side of the fixing member in a state of being inserted, and moves along the guide slot to restrict movement of the fixing member can do.

The molten steel temperature measuring apparatus may further include an extension cable having a connection terminal connected to the thermocouple, and the connection terminal may be made of platinum or nickel.

The molten steel temperature measuring apparatus may further include an extension cable installed inside the support arm, the extension cable including: a plurality of connection terminals connected to the thermocouple; A plurality of extension wires each connected to the connection terminal; A plurality of ceramic insulators each of which surrounds the extended wires, and which are made of an insulating material; And a metallic flexible tube enclosing the ceramic insulator together.

The ceramic insulator surrounding the anode connection terminal of the connection terminal may be red.

The extension cable includes: a connection connector fixed to a thermocouple head connected to an upper end of the thermocouple by a screw fastening method; And a connection pipe connected to one end of the metallic flexible tube and inserted and fixed in the connection connector and rotatable with respect to the connection connector, And at least one fastening hole passing through the one surface of the connection connector, wherein the connection tube is protruded from a surface opposite to the connection connector and is inserted into the support groove, And a fitting thread passing through the fastening hole is fixed to the fixing groove to prevent the connection tube from rotating relative to the connection connector.

The extension cable is fixed to one end of the metallic flexible tube and has a hollow connection connector having a connector tube and a connector cutout formed along the longitudinal direction of the connector tube; A semicircular insertion ring inserted into the connection connector, and an insertion ring fixing hole extending outwardly from the insertion ring and inserted in the connector cutout.

Wherein the molten steel temperature measuring apparatus includes a metal ring having a semicircular support ring inserted outside the connector tube and having a support ring flange extending outward from the support ring and having a support ring fixing hole, Wherein the insertion ring flange and the support ring flange can be fastened through a thread passing through the insertion ring fixing hole and the support ring fixing hole.

Wherein the molten steel temperature gauge further comprises a semicircular auxiliary ring provided outside the connector tube and an auxiliary ring flange extending outwardly from the auxiliary ring and having an auxiliary ring fixing hole, To fasten said auxiliary ring flange to said insert ring flange and said support ring flange.

Wherein the molten steel temperature gauge includes a radio transmitter connected to a rear end of the support arm and wirelessly transmitting the temperature of the molten steel measured through the thermocouple; And a meter for receiving the temperature of the molten steel from the radio transmitter.

According to an embodiment of the present invention, the temperature of the molten steel stored in the tundish can be measured, and the thermocouple can be easily attached and detached through the moving groove and the moving slot of the thermo-sensitive head. In addition, the temperature of the molten steel measured through the thermocouple can be transmitted wirelessly. In addition, it is possible to prevent twisting of the extension cable connected to the thermocouple, thereby preventing an internal short of the extension cable.

1 is a perspective view schematically showing a molten steel temperature measuring apparatus according to an embodiment of the present invention.
Figs. 2 and 3 are perspective views schematically showing the temperature-measuring head shown in Fig. 1. Fig.
4 is a sectional view of the temperature-measuring head shown in Figs. 2 and 3. Fig.
5 is a view showing the upper support plate shown in Fig.
6 is a view showing the lower support plate shown in Fig.
7 is a perspective view showing the fixed block and the stopper shown in Fig.
Fig. 8 is a view schematically showing the extension cable shown in Fig. 1. Fig.
9 and 10 are views showing the connection structure of the connection connector and the metal connector shown in FIG.
11 is a cross-sectional view showing the connection structure of the connection connector and the connection pipe shown in Fig.
12 is a view showing a driving motor, a driving gear and a fixed gear for driving the rotating plate shown in Fig.
13 is a view showing an elevating member and an elevating motor for lifting and lowering the rear support arm shown in Fig.
14 is a block diagram schematically showing the radio transmitter shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

1 is a perspective view schematically showing a molten steel temperature measuring apparatus according to an embodiment of the present invention. As shown in Fig. 1, the molten steel temperature measuring apparatus includes a thermocouple 422 and a thermo-sensitive head holding the refractory 430, and the thermo-sensitive head has housings 410 and 412 having an open top.

The temperature-measuring head is connected to the front support arm 450 and the rear support arm 460, and the rear support arm 460 is moved up and down along the support rod 310. The support rod 310 is installed on the rotary plate 210 and the support rod 310 is rotated together with the front support arm 450 and the rear support arm 460 by the rotation of the rotary plate 210. The wireless transmitter 320 wirelessly transmits the measured temperature through the thermocouple 422 and the meter 10 receives the signal from the wireless transmitter 320 and displays the measured temperature value on the screen.

Fig. 2 and Fig. 3 are perspective views schematically showing the thermo-sensitive head shown in Fig. 1, and Fig. 4 is a cross-sectional view of the thermo-sensitive head shown in Figs. The housing has a front housing 412 and a rear housing 410, and an upper opened shape. The cover 411 is rotatably coupled to the rear housing 410 to open and close the open top of the housing through rotation. 3 and 4, the front housing 412 includes an upper support plate 415 and a lower support plate 416, and the upper support plate 415 and the lower support plate 416 are vertically disposed, Do.

FIG. 5 is a view showing the upper support plate shown in FIG. 3, and FIG. 6 is a view showing the lower support plate shown in FIG. The upper support plate 415 has an upper through hole 423a and the lower support plate 416 has a lower through hole 425a. The support member 427 is in the shape of a cylinder and is provided on the upper portion of the upper support plate 415. The thermocouple 422 passes through the inside of the support member 427 and extends to the lower portion of the front housing 412 through the upper through hole 423a and the lower through hole 425a. The thermocouple 422 measures the temperature of the molten steel stored in the tundish (not shown). The thermocouple head 421 is connected to the upper end of the thermocouple 422 and the thermocouple head 421 is supported by the supporting member 427. The extension cable 470 to be described later is connected to the thermocouple 422 via the thermocouple head 421 and the temperature measured through the thermocouple 422 is transmitted through the extension cable 470.

The front housing 412 has a moving groove 412a formed on the side surface in a vertical direction and the moving groove 412a has an upper through hole 423a and a lower through hole 423b through an upper moving slot 423b and a lower moving slot 425b, And are respectively connected to the lower through holes 425a. The upper through hole 423a and the lower through hole 425a are formed in the upper support plate 415 and the lower support plate 416, respectively.

Therefore, the operator can draw the thermocouple 422 into the inside of the front housing 412 through the moving groove 412a, the upper moving slot 423b and the lower moving slot 425b, and the upper through holes 423a and And can be provided on the lower through-hole 425a. Conventionally, since the worker has to install the thermocouple 422 through the upper part of the front housing 412, it is required not only to operate the operator excessively but also to secure the action radius for the installation, The mobile slot 423b and the lower mobile slot 425b can alleviate such a hassle.

7 is a perspective view showing the fixed block and the stopper shown in Fig. The thermocouple 422 is accommodated in the refractory 430 and the refractory 430 is supported by the lower support plate 416. The refractory 430 has an expanded shape at an upper end thereof and is fixed through a fixing block 440. 2, the front housing 412 has a guide slot 414 formed in front of the thermocouple head 421 and an insertion slot 414 formed on the opposite side of the moving groove 412a. 4, the fixed block 440 is inserted through the insertion slot 414 and fixedly supports the refractory 430. The fixed block 440 has a U- The refractory 430 is inserted into the lower through hole 425a through the lower portion of the front housing 412 and the fixing block 440 is inserted into the insertion slot 414 to support the refractory 430. [

The handle 443 is connected to the rear end of the fixed block 440 and the operator can use the handle 443 to insert the fixed block 440 into the insertion slot 414 or remove it from the insertion slot 414. [ As shown in Fig. 2, the stopper 442 is connected to one side of the fixed block 440 and is located on the guide slot 414. The stopper 442 can be inserted and fixed to one side of the fixed block 440 in a state where the fixed block 440 is inserted into the insertion slot 414. [ As shown in Fig. 2, the stopper 442 is located at a position opposite to the end-insertion slot 414 of the guide slot 414 with the fixed block 440 fully inserted. When the fixed block 440 is pulled out from the insertion slot 414, the stopper 442 is positioned at the opposite end of the guide slot 414 - located at the insertion slot 414 side, and the movement of the fixed block 440 Thereby preventing completely disengaging from the front housing 412. When the stopper 442 is detached from the fixed block 440, the fixed block 440 can be moved in the opposite direction to the insertion direction and separated from the front housing 412.

The fixed block 440 is further described in the prior art. The refractory is supported by a wedge-shaped (or detachable) fixing block. When the detachable block 440 is detached, the fixed block is held or stored in a separate place. There was a danger. The upper fixing block 440 can remove the refractory 430 while partially removing the fixing block 440 from the insertion slot 414 when the refractory 430 is removed, The fixing block 440 can be prevented from being fully drawn out through the fixing block 440 so that the risk of loss can be eliminated and the fixing block 440 need not be stored or held in a separate place at all.

Fig. 8 is a view schematically showing the extension cable shown in Fig. 1. Fig. The extension cable 470 is connected to the thermocouple 422 through the thermocouple head 421 and to the wireless transmitter 320 through the interior of the support arms 450 and 460. The extension cable 470 delivers the measured temperature value through the thermocouple 422 to the wireless transmitter 320. [ 8, the extension cable 470 has a cathode terminal 472 and a cathode terminal 474 connected to the thermocouple head 421. [ Both terminals 472 and 474 are connected to the extension wires 471 and 473, respectively, and may be made of a material having good electrical conductivity such as platinum or nickel and having excellent high-temperature characteristics. In this case, it is possible to eliminate the deviation of the terminal according to the temperature.

The extension wires 471 and 473 form a ring-shaped ring so as to be extendable so as to prevent disconnection. The extension wires 471 and 473 extend through the connection connectors 480 and 490 and the flexible tube 479 and are connected to the metal connector 495. The metal connector 495 is connected to the wireless transmitter 320 through the metal socket 494. [ Lt; / RTI >

The extension wires 471 and 473 are respectively coated through the ceramic insulators 475 and 476 to prevent mutual short-circuiting. At this time, the ceramic insulator 475 connected to the anode terminal 472 may be red, and the operator can easily identify the anode terminal 472 and connect it to the thermocouple head 421. The ceramic insulators 475 and 476 may be made of alumina. In addition, the ceramic insulators 475 and 476 are surrounded by the metallic flexible tube 479, and the heat resistant performance can be secured through the metallic flexible tube 479. Therefore, it is possible to prevent the extension cable 470 from being deteriorated and damaged by the high temperature.

9 and 10 are views showing the connection structure of the connection connector and the metal connector shown in FIG. 9 and 10, the connector 490 has a connector tube 491 located at the front, and the connector tube 491 has a connector cutout 491a formed along the longitudinal direction have. The metal connector 495 has a semicircular support ring 146 and a support ring flange 148 extending outwardly from the support ring 146 and the support ring flange 148 has a support ring fixing hole 148a I have. The support ring 146 has an inner diameter substantially the same as the outer diameter of the connector tube 491.

The connector tube 491 is inserted into the support ring 146 and is connected to the metal connector 495 through the insertion ring 142 and the insertion ring flange 144. The insertion ring 142 is semicircular in shape and the insertion ring flange 144 extends outward from the insertion ring 142. The insertion ring flange 144 has an insertion ring fixing hole 144a. The insertion ring 142 is inserted into the connector tube 491 and has an outer diameter substantially equal to the inner diameter of the connector tube 491. The insertion ring flange 144 is protruded to the outside of the connector tube 491 through the connector cutout portion 491a and the insertion ring fixing hole 144a is inserted into the connector tube 491, Is disposed outside the connector tube 491. [

The support ring 146 is provided at the bottom of the connector tube 491 and the support ring flange 148 is installed at the bottom of the insert ring flange 144. An auxiliary ring 147 is provided on the upper portion of the connector tube 491 and an auxiliary ring flange 149 is provided on the upper portion of the insertion ring flange 144. The support ring fixing hole 148a and the auxiliary ring fixing hole 149a are disposed at substantially the same positions as the insertion ring fixing hole 144a and the fitting thread S is fixed to the auxiliary ring fixing hole 149a and the insertion ring fixing hole 149a 144a and the support ring fixing hole 148a in order to fasten the auxiliary ring flange 149 and the insertion ring flange 144 and the support ring flange 148 together. The lower portion of the connector tube 491 is positioned between the insertion ring 142 and the support ring 146 and the insertion ring flange 144 restricts rotation of the connector tube 491 relative to the metal connector 495 . Therefore, in a state where the connection connector 490 is connected to the metal connector 495, the connection connector 490 can be rotated relative to the metal connector 495 to prevent the inner extension wires 471 and 473 from being twisted or broken have.

11 is a cross-sectional view showing the connection structure of the connection connector and the connection pipe shown in Fig. The connector tube 482 is fixed to one end of the metallic flexible tube 479 and inserted and fixed in the connector connector 480. The connecting connector 480 is rotatable on the connecting tube 482, and the threaded portion on the outer circumferential surface is fixed to the thermocouple head 421 through rotation. Thus, the extension cable 470 can be stably connected to the thermocouple head 421.

More specifically, the connection tube 482 has a support ring 482a and a fixing groove 482c. The support ring 482a protrudes from one surface opposite to the connection connector 480, and the fixing groove 482c And is recessed from one surface opposite to the connection connector 480. The connection connector 480 has a support groove 480a and a fastening hole 480c and the support groove 480a is recessed from one surface facing the connection tube 482 and the fastening hole 480c is fixed to the fixing groove 482c so as to pass through the outer circumferential surface of the connector 480. [ The support ring 482a is inserted into the support groove 480a and is fastened to the connection connector 480. The support ring 482a of the connection ring 480 is rotated along the support groove 480a Move. The fitting screw 483 penetrates through the fastening hole 480c and is fastened to the fixing groove 482c so that the rotation of the connecting connector 480 can be restricted at the time of fastening the fitting screw 483, Can be prevented from being separated from the thermocouple head 421. In particular, rotation of the connector 480 prevents the inner extension wires 475 and 475 from being twisted, shorted or broken.

12 is a view showing a driving motor, a driving gear and a fixed gear for driving the rotating plate shown in Fig. The base 100 is supported through the control box 12 and the fixed gear 101 is fixed to the upper portion of the base 100. The support rod 310 stands upright on the upper surface of the rotary plate 210 and the stationary gear 101 is rotatable independently from the base 100 through a bearing. The rotating plate 210 rotates together with the fixed gear 101. The drive motor 220 is installed inside the control box 12 and the motor shaft of the drive motor 220 passes through the base 100. The drive gear 222 is connected to the motor shaft of the drive motor 220 and meshes with the fixed gear 101. The driving gear 222 is rotated by engaging with the fixed gear 101 so that the fixed gear 101 rotates and the rotating plate 210 can rotate.

13 is a view showing an elevating member and an elevating motor for lifting and lowering the rear support arm shown in Fig. The support rod 310 is installed on the upper part of the rotary plate 210 and the elevating motor 312 is installed on one side of the support rod 310. The driving shaft 320 is connected to the elevating motor 312 and is rotatable by the elevating motor 312 and the driven shaft 330 is rotatably installed on the supporting rod 310. The driving sprocket 321 and the driven sprocket 331 are respectively installed on the driving shaft 320 and the driven shaft 330. The chain 340 is engaged with the driving sprocket 321 and the driven sprocket 331, As shown in Fig. The lifting member 350 is connected to the chain 340 and moves up and down according to the movement of the chain 340. The guide wheel 351 is provided on both sides of the elevation member 350 and the bracket 352 connects the elevation member 350 and the rear support arm 460.

The rotation of the drive sprocket 321 causes the chain 340 to move and rotate the driven sprocket 331 to rotate the drive sprocket 321, . As the chain 340 moves, the elevating member 350 and the rear supporting arm 460 ascend and descend along the inside of the support rod 310. The elevating member 350 smoothly moves through the guide wheel 351 It can ascend and descend.

On the other hand, according to the above-described method, the temperature-measuring head can be raised and lowered together with the rear support arm 460 and the front support arm 450, and can be raised and lowered step by step, thereby changing the position of the overhanded portion of the refractory. The temperature-measuring head can ascend and descend in increments of 100 mm when ascending and descending, and can be raised or lowered by one step each time the operator presses the ascending button or the descending button of the control panel 10 once. In addition, it is possible to automatically adjust the position by instructing the position change per hour according to the input value through the control panel 10. [ For example, the input value can be set so that the current position is maintained for 2 hours, and then the lift is increased to 300 mm.

14 is a block diagram schematically showing the radio transmitter shown in Fig. The wireless transmitter 10 includes a microprocessor 11 and a transmitter 13. The microprocessor 11 receives the measured temperature value through the thermocouple 422, digitizes the temperature value, and transmits it to the transmitter 13. The transmitter 13 is connected to the meter 10 via wireless communication and transmits the measured temperature value to the meter 10.

Although the present invention has been described in detail by way of preferred embodiments thereof, other forms of embodiment are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the preferred embodiments.

10: Meter 12: Control box
14: support bar 210: spindle
221: motor box 310: support rod
312: driving rod 320: radio transmitter
410: rear housing 411: cover
412: front housing 412a: moving groove
413: insertion slot 421: head
430: refractory material 450: front support arm
460: Rear support arm 470: Extension cable

Claims (6)

A thermocouple measuring the temperature of molten steel stored in the tundish;
A refractory material into which the thermocouple is inserted;
A thermocouple and a thermocouple holding the refractory material;
A support arm connected to the temperature measurement head to support the temperature measurement head;
A support rod installed on one side of the tundish and to which the support arm is connected;
A lifting and guiding unit for lifting the support arm along the support rod;
A base connected to a lower portion of the support rod; And
And a rotation driving unit for rotationally driving the base,
Wherein the temperature measuring head comprises:
A housing having an upper opening and a moving groove cut along a vertical direction of a side surface; And
And an upper support plate and a lower support plate each having an upper through hole for inserting the thermocouple and a lower through hole for inserting the refractory,
Wherein the upper support plate and the lower support plate further have an upper movement slot and a lower movement slot which provide the moving passage of the thermocouple through the upper through hole and the lower through hole and the moving groove respectively. Hot water temperature measuring device. The method according to claim 1,
Wherein the molten steel temperature measuring apparatus further comprises a support member installed on the upper support plate and holding the thermocouple. The method according to claim 1,
The housing has an insertion slot formed on a side surface and disposed between the upper support plate and the lower support plate,
Wherein the molten steel temperature measuring apparatus further comprises a 'U' shaped fixed block inserted into the insertion slot to support the refractory. The method of claim 3,
Wherein the housing has a guide slot parallel to the insertion direction of the fixing member,
Wherein the fixing member includes a stopper fixed to one side of the fixing member in a state of being inserted and moving along the guide slot and restricting movement of the fixing member. The method according to claim 1,
The molten steel temperature measuring apparatus further includes an extension cable having a connection terminal connected to the thermocouple,
Wherein the connecting terminal is made of platinum or nickel. The method according to claim 1,
The molten steel temperature measuring apparatus may further include:
A wireless transmitter connected to a rear end of the support arm and wirelessly transmitting the temperature of the molten steel measured through the thermocouple; And
Further comprising a meter for receiving the temperature of the molten steel from the radio transmitter.

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