TWI495512B - Nozzle device - Google Patents

Description

Nozzle device

The present invention relates to a component of a casting apparatus, and more particularly to a nozzle apparatus.

The steel industry often needs to cast molten steel into a thin strip of steel through a casting device, and then carry out subsequent operations such as rolling forming and product making. Referring to FIG. 1 , a casting apparatus 10 is provided. The casting apparatus 10 includes a crucible 11 for accommodating molten steel, a nozzle 12 coupled to the bottom of the crucible 11 and communicating with the crucible 11 , and a support for supporting the crucible 11 . The nozzle 12 and the support seat 13 that tightly couples the nozzle 12 to the crucible 11. In the casting, the molten steel is first injected into the crucible 11, and the molten steel flows through the crucible 11 and flows into the nozzle 12, and then flows out from one end of the nozzle 12 and cools to form a thin strip steel embryo. However, since the molten steel is in a high temperature state, when the molten steel flows through the nozzle 12, the molten steel is easily solidified due to the low temperature of the nozzle 12, and the casting cannot be performed smoothly. Moreover, most of the support seats 13 are made of refractory material to avoid severe deformation, softening or fire due to high temperature in the casting process, but the rigidity of the refractory material at high temperature is insufficient, and the support seat 13 is easily generated by thermal shock as shown in FIG. Crack or rupture. Although the patent publication No. 201242689 of the Republic of China discloses a metallurgical tank for molten metal, the overall structure is strengthened by the metal outer seal, but the phenomenon that the molten steel flows through the nozzle is likely to be solidified during the casting process.

Accordingly, it is an object of the present invention to provide a nozzle device having a heating function and being highly practical.

Thus, the nozzle device of the present invention is mounted on a casting device comprising a crucible for holding molten steel, the crucible having a body for containing molten steel, and an output port disposed at the bottom of the body.

The nozzle device comprises a support seat disposed at a bottom of the body and surrounding the output port, a nozzle disposed in the support seat, and a first heating unit disposed in the support base for heating the nozzle.

The support base comprises a body and a groove extending through the upper and lower sides of the base body and having an upper width and a lower width. The seat body has a stainless steel layer and a first heat insulation layer located inside the stainless steel layer. The nozzle is disposed in the groove and the upper and lower ends are exposed outside the groove, and the upper end of the nozzle is coupled to the bottom of the body of the crucible and communicates with the output port, and includes a surrounding wall that matches the shape of the groove. The surrounding wall defines a passage for the molten steel in the body of the crucible to circulate and communicate with the outside. The first heating unit includes a first heating member disposed in the housing and covered by the first thermal insulation layer to heat the nozzle.

The effect of the invention is that the nozzle can be heated by the first heating member to avoid solidification during the molten steel casting process for smooth casting operation. Furthermore, the nozzle is coupled into the recess of the support seat, and the base body abuts and supports the nozzle, so that the nozzle is more encrypted to the bottom of the body of the crucible, and the first partition of the base body The hot layer can effectively isolate the high temperature and cooperate with the stainless steel layer to improve the overall rigidity, thereby improving the thermal shock caused by high temperature. Causes cracks.

20‧‧‧ casting device

21‧‧‧坩埚

211‧‧‧ body

212‧‧‧Outlet

22‧‧‧Support steel plate

23‧‧‧Insulated thermal insulation board

24‧‧‧坩埚板

25‧‧‧Flexible bolts

3‧‧‧ support

31‧‧‧

311‧‧‧Stainless steel layer

312‧‧‧First insulation

32‧‧‧ Groove

4‧‧‧ nozzle

41‧‧‧ Around the wall

42‧‧‧ channel

5‧‧‧First heating unit

51‧‧‧First heating element

6‧‧‧Second heating unit

61‧‧‧Shell

611‧‧‧ openings

62‧‧‧Second insulation

63‧‧‧second heating element

7‧‧‧ Positioning platen

8‧‧‧Fixed parts

Other features and advantages of the present invention will be apparent from the following description of the drawings. FIG. 1 is a cross-sectional view illustrating a conventional casting apparatus; FIG. 2 is a bottom view, and FIG. Figure 3 is a cross-sectional view showing a preferred embodiment of the nozzle device of the present invention.

Referring to FIG. 3, a preferred embodiment of the nozzle device of the present invention is mounted on a casting device 20. The casting device 20 includes a crucible 21 for holding molten steel, and a beside the crucible 21 for supporting the crucible. a supporting steel plate 22 of 21, an insulating heat insulating plate 23 disposed between the crucible 21 and the supporting steel plate 22, a plurality of pressing plates 24 for positioning the crucible 21 on the supporting steel plate 22, and a plurality of The elastic bolt 25 that locks the rolling plate 24 to the supporting steel plate 22 is used. The cymbal 21 has a body 211 for accommodating molten steel, and an output port 212 disposed at the bottom of the body 211. The cymbal 21 is positioned on the insulating heat-dissipating plate 23 by the pressing plate 24 and is tightly coupled to the supporting steel plate 22, and the tamping plate 24 is locked to the support by the elastic bolt 25. On the steel plate 22, the crucible 21 is positioned.

The nozzle device includes a support base 3 disposed at the bottom of the body 211 and surrounding the output port 212, a nozzle 4 disposed in the support base 3, and a nozzle 4 disposed in the support base 3 for heating the nozzle 4 First plus a heating unit 5, a second heating unit 6 movably disposed under the nozzle 4 for heating the nozzle 4, a plurality of positioning pressing plates 7 for coupling the supporting base 3 to the supporting steel plate 22, and A plurality of fixing members 8 for locking the positioning platen 7 to the supporting steel plate 22 respectively.

The support steel plate 22 surrounds the support base 3. The support base 3 includes a base body 31 and a groove 32 extending through the upper and lower sides of the base body 31 and having an upper width and a lower width. The seat body 31 has a stainless steel layer 311 and a first heat insulation layer 312 located inside the stainless steel layer 311. The upper end of the nozzle 4 is coupled to the bottom of the body 211 of the crucible 21 and communicates with the output port 212, and includes a surrounding wall 41 matching the shape of the recess 32. The surrounding wall 41 defines a body for the crucible 21. The passage 42 in which the molten steel in the 211 flows and communicates with the outside. The nozzle 4 is coupled to the recess 32 of the support base 3, and the base body 31 abuts and supports the nozzle 4, so that the nozzle 4 is more encrypted to the bottom of the body 211 of the crucible 21.

The first heating unit 5 includes a first heating member 51 which is disposed in the seat body 31 and is covered by the first heat insulating layer 312 and used to heat the nozzle 4. The second heating unit 6 further includes a housing 61 movably disposed below the nozzle 4 and having an opening 611, a second thermal insulation layer 62 disposed in the housing 61, and a second spacer The thermal layer 62 is coated and passed through the opening 611 for heating the second heating member 63 of the nozzle 4.

Before the casting, the first heating member 51 and the second heating member 63 are opened to heat the surrounding wall 41 of the nozzle 4. During casting, the outer casing 61 of the second heating unit 6 is first moved away from the nozzle 4 and away from the nozzle 4, while the first heating member 51 continues to heat the nozzle 4. Then the molten steel Injected into the body 211 of the crucible 21, and the output port 212 flows through the surrounding wall 41 and the passage 42, and since the surrounding wall 41 has been heated by the high temperature, when the molten steel flows through the surrounding wall 41, Because the temperature is excessively lowered, the molten steel is solidified, and the casting operation can be smoothly performed. Finally, the molten steel flows out of the nozzle 4 and is cooled to form a thin strip steel blank to complete the casting operation.

The nozzle device of the present invention heats the nozzle 4 by the first heating member 51 and the second heating member 63, thereby effectively preventing solidification of molten steel when flowing through the nozzle 4, thereby improving casting production efficiency. It should be particularly noted that the surrounding wall 41 of the nozzle 4 is closely coupled to the seat body 31 in the shape of the groove 32 of the support base 3, and the first heat insulating layer 312 of the seat body 31 is fire resistant. It is composed of a good material and has the effect of refracting heat and heat, and the stainless steel layer 311 is used to cover the design of the first heat insulating layer 312, thereby enhancing the rigidity of the support base 3 and effectively improving the high temperature during casting. The thermal shock causes the support base 3 to rupture, and the thermal shock resistance is improved. The positioning platen 7 is positioned and coupled to the supporting steel plate 22, and the positioning platen 7 is pressed upwardly by the fixing member 8 and locked on the supporting steel plate 22, so that the positioning plate 3 is used. The upper end of the nozzle 4 is tightly coupled to the bottom of the body 211 of the crucible 21 to prevent leakage of molten steel from the joint.

In summary, the nozzle device of the present invention heats the nozzle 4 by the first and second heating members 51, 63, thereby preventing solidification during the molten steel casting process, so as to smoothly carry out the casting operation. Moreover, the support base 3 abuts and supports the nozzle 4, so that the nozzle 4 is more encrypted to the bottom of the body 211 of the crucible 21, and the first thermal insulation layer 312 of the base 31 cooperates with the stainless steel layer 311. Can effectively improve and avoid the thermal shock caused by high temperature, which leads to the branch The support 3 is cracked, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

20‧‧‧ casting device

21‧‧‧坩埚

211‧‧‧ body

212‧‧‧Outlet

22‧‧‧Support steel plate

23‧‧‧Insulated thermal insulation board

24‧‧‧坩埚板

25‧‧‧Flexible bolts

3‧‧‧ support

31‧‧‧

311‧‧‧Stainless steel layer

312‧‧‧First insulation

32‧‧‧ Groove

4‧‧‧ nozzle

41‧‧‧ Around the wall

42‧‧‧ channel

5‧‧‧First heating unit

51‧‧‧First heating element

6‧‧‧Second heating unit

61‧‧‧Shell

611‧‧‧ openings

62‧‧‧Second insulation

63‧‧‧second heating element

7‧‧‧ Positioning platen

8‧‧‧Fixed parts

Claims (3)

A nozzle device is mounted on a casting device, the casting device comprising a crucible for holding molten steel, and a supporting steel plate under the crucible for supporting the crucible, the crucible having a body for accommodating molten steel And an output port disposed at a bottom of the body, the nozzle device includes: a support seat disposed at a bottom of the body of the cymbal and surrounding the output port, and including a body, and a top and bottom sides of the body And a wide and narrow groove, the seat body has a stainless steel layer, and a first heat insulation layer on the inner side of the stainless steel layer, wherein the support steel plate surrounds the support base; a nozzle is disposed on the support base The upper end of the nozzle is exposed outside the groove, and the upper end of the nozzle is coupled to the bottom of the body of the crucible and communicates with the outlet, and includes a surrounding wall that matches the shape of the groove, the surrounding wall defines a passage for the molten steel in the body of the crucible to communicate with the outside; a first heating unit comprising two spacers disposed in the housing and covered by the first thermal insulation layer of the housing for heating A first nozzle heating element; a plurality of platens positioned, fixed to the base body outside of the stainless steel layer and bonded to the support plate; and a plurality of fasteners, each platen locking the positioning on the support plate. The nozzle device according to claim 1, further comprising a movable setting a second heating unit below the nozzle for heating the nozzle. The nozzle device of claim 2, wherein the second heating unit comprises a casing movably disposed below the nozzle and having an opening, a second heat insulation layer disposed in the casing, and a A second heating member covered by the second insulating layer and passing through the opening for heating the nozzle.