CN216705884U - Copper pipe horizontal continuous casting secondary crystallizer - Google Patents
Copper pipe horizontal continuous casting secondary crystallizer Download PDFInfo
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- CN216705884U CN216705884U CN202123206188.XU CN202123206188U CN216705884U CN 216705884 U CN216705884 U CN 216705884U CN 202123206188 U CN202123206188 U CN 202123206188U CN 216705884 U CN216705884 U CN 216705884U
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Abstract
The utility model discloses a copper pipe horizontal continuous casting secondary crystallizer, which comprises a front cover plate and a rear cover plate which are connected together through a bolt connecting structure, wherein the front cover plate is provided with a front central hole, and the rear cover plate is provided with a rear central hole; the front cover plate is provided with water inlet holes along the radial direction, water spray holes which incline backwards and face the outer surface of the casting blank are formed by the surrounding of the front cover plate and the rear cover plate, the water spray holes are communicated with the water inlet holes outwards in the radial direction and are communicated with the front center hole and the rear center hole inwards, and the water inlet holes are used for being connected with an external high-pressure water source. The front part of the front cover plate is provided with an air inlet hole along the radial direction for introducing inert gas. According to the utility model, through water spraying and cooling, the casting blank has better structure and performance; meanwhile, the water spraying direction is consistent with the moving direction of the casting blank and is positioned outside the casting blank, so that safety accidents caused by secondary backflow in the past are avoided. The inert gas protection device can form an effective inert gas protection layer for a high-temperature casting blank to prevent oxidation defects.
Description
Technical Field
The utility model relates to the technical field of horizontal continuous casting, in particular to a secondary crystallizer.
Background
Copper pipes are applied to various aspects of life, and the main methods for preparing copper pipes at present are a horizontal continuous casting method and an extrusion method. The horizontal continuous casting method has the characteristics of small equipment investment, high production efficiency, low production cost and the like, and is widely applied to copper pipe preparation.
Especially, in the preparation process of the air-conditioning pipe for refrigeration and heat exchange, the horizontal continuous casting method is mostly adopted. The metal is solidified into an initial blank shell in the primary crystallizer and is completely solidified into a copper pipe under the combined action of the primary crystallizer and the secondary crystallizer.
The secondary crystallizer used at present adopts a soaking mode, and a high-temperature copper pipe is directly soaked in secondary cooling water after being led out from the primary crystallizer, so that forced cooling is realized.
Due to the adoption of the soaking mode, problems can occur when the pipe is pulled, and if a half of the pipe is pulled, water flow of the secondary crystallizer flows back to the primary crystallizer or even to a front cavity of the heat preservation furnace along the pipe, so that explosion accidents are caused. Meanwhile, for some alloys, the cooling strength is too high in a soaking mode, and the obtained casting blank is difficult to have good structure and performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a copper pipe horizontal continuous casting secondary crystallizer, which can avoid the technical problem caused by soaking and cooling by uniformly spraying water to the outer surface of a casting blank for cooling.
In order to achieve the above object, the present invention provides a copper pipe horizontal continuous casting secondary crystallizer, which uses the moving direction of casting blank production as backward direction and the reverse direction as forward direction, and comprises a front cover plate and a rear cover plate which are connected together by a bolt connection structure, wherein the front cover plate is provided with a front center hole for passing through the casting blank, and the rear cover plate is provided with a rear center hole for passing through the casting blank;
the front cover plate is provided with water inlet holes along the radial direction, water spray holes which incline backwards and face the outer surface of the casting blank are formed by the surrounding of the front cover plate and the rear cover plate, the water spray holes are communicated with the water inlet holes outwards in the radial direction and are communicated with the front center hole and the rear center hole inwards, and the water inlet holes are used for being connected with an external high-pressure water source.
The section of the rear central hole is in a horn shape with a large rear part and a small front part.
The bolt connecting structure is used for continuously adjusting the width of the outlet part of the water spraying hole on line; the bolt connecting structure comprises a front threaded hole formed in the rear end face of the front cover plate, a rear threaded hole formed in the corresponding position of the rear cover plate, a connecting bolt in threaded fit with the front threaded hole and the rear threaded hole, and an elastic gasket sleeved on the connecting bolt and pressed between the front cover plate and the rear cover plate.
The back end of the front cover plate is provided with a gasket groove, the front end of the elastic gasket is pressed at the bottom of the gasket groove, and the central line of the gasket groove is perpendicular to the matching surface of the front cover plate and the back cover plate.
The front part of the front cover plate is provided with an air inlet hole for introducing inert gas along the radial direction, the front end of the front cover plate is provided with an inert gas protection passage at the radial inner end, the inert gas protection passage is annular and is communicated with the front central hole along the circumferential direction, and the air inlet hole is communicated with the inert gas protection passage; the width of the inert gas protection passage is represented by d1, and d1 is more than or equal to 0.5mm and less than or equal to 1 mm.
The included angle between the water spraying direction of the water spraying holes and the casting blank bus is theta degrees, and theta is more than or equal to 5 and less than or equal to 40.
The utility model also provides a spray cooling method for the copper pipe horizontal continuous casting secondary crystallizer, when in use, a casting blank passes through the front central hole and the rear central hole from front to back, inert gas is introduced into the air inlet hole through the high-pressure inert gas source, high-pressure water is introduced into the water inlet hole through the high-pressure water source, the inert gas wraps the surface of the casting blank so as to isolate air and prevent the surface of the casting blank from being oxidized, and water is sprayed on the surface of the casting blank from front to back so as to cool the casting blank.
When the cooling speed of the casting blank needs to be adjusted, the compression degree of the elastic gasket is adjusted by adjusting the screwing degree of the bolt connecting structure, so that the distance D1 between the front cover plate and the rear cover plate is adjusted, and finally the width D2 of the outlet of the water spray hole is adjusted so as to adjust the water spray quantity of the water spray hole; the amount of water sprayed is 100 liters/minute or less and 5 liters/minute or more.
The utility model has the following advantages:
according to the utility model, water is sprayed to the outer surface of the casting blank through the water spraying holes for cooling, and compared with the traditional soaking cooling, the cooling strength is reduced from overlarge to moderate, so that the casting blank has better structure and performance; meanwhile, the water spraying direction is consistent with the moving direction of the casting blank and is positioned outside the casting blank, so that accidents (such as explosion) caused by that water flows back to a primary crystallizer or even a heat preservation furnace front cavity along a casting blank central hole are avoided. The water spraying direction is backward, so that the water is prevented from flowing backwards to cause safety accidents.
The bolt connecting structure can realize on-line continuous adjustment on the width d2 of the outlet part of the water spraying hole, and the control of the water spraying amount in unit time is very convenient.
The gasket groove restrains the compression deformation direction of the gasket in the direction perpendicular to the matching surface of the front cover plate and the rear cover plate, and the adjustment of the distance between the front cover plate and the rear cover plate is facilitated.
When the device is used, an external high-pressure inert gas source (such as a high-pressure gas cylinder or a normal-pressure gas cylinder, when the normal-pressure gas cylinder is adopted, an air pump is required to pressurize inert gas) is connected with the gas inlet hole through a pipeline, enters the front central hole through the inert gas protection passage and is blown out backwards along the front central hole, so that an inert gas protective layer is formed on the surface of a casting blank, and the surface of the casting blank is prevented from being oxidized by contacting with air at high temperature. The inert gas is preferably nitrogen or argon.
By adopting the structure and the method, the width d of the outlet part of the water spraying hole can be continuously adjusted on line, so that the water spraying quantity of the utility model can flexibly adapt to the actual requirement and can match the casting blank processing requirements of different models.
In summary, in order to solve the problems of the conventional immersion type secondary crystallizer, the utility model provides a copper pipe horizontal continuous casting secondary crystallizer which cools a casting blank by spraying cooling water onto the casting blank at a certain angle, wherein the spraying direction of the cooling water is consistent with the advancing direction of the casting blank, and safety accidents caused by backflow of the secondary water can be prevented. Meanwhile, the device is provided with an inert gas protection device, so that effective gas protection can be formed on a high-temperature casting blank, and oxidation defects of the high-temperature casting blank are prevented.
Drawings
FIG. 1 is a schematic structural view of a copper pipe horizontal continuous casting secondary crystallizer of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is an enlarged view at B in fig. 1.
Detailed Description
As shown in fig. 1 to 3, the present invention provides a copper pipe horizontal continuous casting secondary mold, which has a front cover plate 1 and a rear cover plate 3 connected together by a bolt connection structure, with a moving direction of a cast slab 14 during production being a rear direction and a reverse direction being a forward direction, the front cover plate 1 having a front center hole 2 for passing through the cast slab 14, and the rear cover plate 3 having a rear center hole 4 for passing through the cast slab 14;
the front cover plate 1 is provided with water inlet holes 5 along the radial direction, water spray holes 6 which are inclined backwards and face the outer surface of the casting blank 14 are formed between the front cover plate 1 and the rear cover plate 3 in a surrounding mode, the water spray holes 6 are annular surrounding the casting blank 14, the water spray holes 6 are communicated with the water inlet holes 5 outwards in the radial direction and are communicated with the front center hole 2 and the rear center hole 4 inwards, and the water inlet holes 5 are used for being connected with an external high-pressure water source.
According to the utility model, water is sprayed to the outer surface of the casting blank 14 through the water spraying holes 6 for cooling, and compared with the traditional soaking cooling, the cooling strength is reduced from overlarge to moderate, so that the casting blank 14 has better structure and performance; meanwhile, water is sprayed to the outer surface of the casting blank 14, so that accidents (such as explosion) caused by water flowing back to a primary crystallizer and even a heat preservation furnace front cavity along the central hole of the casting blank 14 are avoided. The water spraying direction is backward, so that the water is prevented from flowing backwards to cause safety accidents.
The section of the rear center hole 4 is in a horn shape with a large rear part and a small front part. The bolt connecting structure is used for continuously adjusting the width of the outlet part of the water spraying hole 6 on line; the bolt connecting structure comprises a front threaded hole 7 formed in the rear end face of the front cover plate 1, a rear threaded hole 8 formed in the corresponding position of the rear cover plate 3, a connecting bolt 9 in threaded fit with the front threaded hole 7 and the rear threaded hole 8, and an elastic gasket 10 sleeved on the connecting bolt 9 and pressed between the front cover plate 1 and the rear cover plate 3.
The bolt connecting structure can realize on-line continuous adjustment on the width d2 of the outlet part of the water spraying hole 6, and the control of the water spraying amount in unit time is very convenient.
The back end of the front cover plate 1 is provided with a gasket groove 11, the front end of the elastic gasket 10 is pressed at the bottom of the gasket groove 11, and the central line of the gasket groove 11 is perpendicular to the matching surface of the front cover plate 1 and the back cover plate 3.
The gasket groove 11 restrains the compression deformation direction of the gasket in the direction perpendicular to the matching surfaces of the front cover plate 1 and the rear cover plate 3, and is more favorable for adjusting the distance between the front cover plate 1 and the rear cover plate 3.
The front part of the front cover plate 1 is provided with an air inlet hole 12 for introducing inert gas along the radial direction, the front end of the front cover plate 1 is provided with an inert gas protection passage 13 at the radial inner end, the inert gas protection passage 13 is annular and is communicated with the front central hole 2 along the circumferential direction, and the air inlet hole 12 is communicated with the inert gas protection passage 13; the width d1 of the inert gas protection passage 13 is represented by d1, and d1 is more than or equal to 0.5mm and less than or equal to 1 mm.
When the device is used, an external high-pressure inert gas source (such as a high-pressure gas cylinder or a normal-pressure gas cylinder, when the normal-pressure gas cylinder is adopted, an air pump is required to pressurize inert gas) is connected with the gas inlet 12 through a pipeline, enters the front central hole 2 through the inert gas protection passage 13 and is blown out backwards along the front central hole 2, so that an inert gas protection layer is formed on the surface of a casting blank 14, and the surface of the casting blank 14 is prevented from being oxidized by contacting air at high temperature. The inert gas is preferably nitrogen or argon.
The included angle between the water spraying direction of the water spraying holes 6 and the bus of the casting blank 14 is theta degrees, and theta is more than or equal to 5 and less than or equal to 40.
The utility model also discloses a jet cooling method adopting the copper pipe horizontal continuous casting secondary crystallizer. When the device is used, a casting blank 14 passes through the front central hole 2 and the rear central hole 4 from front to back, inert gas is introduced into the air inlet hole 12 through the high-pressure inert gas source, high-pressure water is introduced into the water inlet hole 5 through the high-pressure water source, the inert gas surrounds the surface of the casting blank 14 to isolate air and prevent the surface of the casting blank 14 from being oxidized, and water is sprayed on the surface of the casting blank 14 from front to back to cool the casting blank 14.
When the cooling speed of the casting blank 14 needs to be adjusted, the compression degree of the elastic gasket 10 is adjusted by adjusting the screwing degree of (the connecting bolt 9 of) the bolt connecting structure, so that the distance D1 between the front cover plate 1 and the rear cover plate 3 is adjusted, and finally the width D2 of the outlet of the water spray hole 6 is adjusted so as to adjust the water spray quantity of the water spray hole 6; the amount of water sprayed is 100 liters/minute or less and 5 liters/minute or more.
By adopting the structure and the method, the width d of the outlet part of the water spraying hole 6 can be continuously adjusted on line, so that the water spraying quantity of the utility model can flexibly adapt to the actual requirement, and can be matched with the processing requirements of casting blanks 14 of different models. The adjustment range of the distance D1 between the front cover plate 1 and the rear cover plate 3 is: d1 is not less than 0.5mm and not more than 4 mm.
Example one
Phi 92 x 25 TP2 copper pipe horizontal continuous casting
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 2.5mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 2mm, and the width D1 of the inert gas protection passage 13 was set to 0.8 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 15 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls the high-pressure water source to feed water into the water inlet hole 5, the water inlet flow rate is 60l/min (liter/minute), and simultaneously controls the high-pressure inert gas source to feed the water into the inert gas inlet hole 12, so that nitrogen surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
Example two
Phi 90 x 20T 1 copper pipe horizontal continuous casting
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 2mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 1.8mm, and the width D1 of the inert gas protection passage 13 was set to 0.5 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 20 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 50l/min, and simultaneously controls a high-pressure inert gas source to feed water into the inert gas inlet hole 12, so that nitrogen surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
EXAMPLE III
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 1.8mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 1.5mm, and the width D1 of the inert gas protection passage 13 was set to 0.6 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 25 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 40l/min, and simultaneously controls a high-pressure inert gas source to feed water into the inert gas inlet hole 12, so that argon surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
Example four
Phi 70 x 15H 68 brass tube horizontal continuous casting
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 1.5mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 1.5mm, and the width D1 of the inert gas protection passage 13 was set to 0.6 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 30 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 30l/min, and simultaneously controls a high-pressure inert gas source to feed water into the inert gas inlet hole 12, so that nitrogen surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
EXAMPLE five
Phi 30X 8 TU00 copper pipe horizontal continuous casting
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 0.5mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 0.3mm, and the width D1 of the inert gas protection passage 13 was set to 0.5 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 5 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 5l/min, and simultaneously controls a high-pressure inert gas source to feed water into the inert gas inlet hole 12, so that the argon is filled in the gas protection channel 9, and the water vapor permeation is prevented.
EXAMPLE six
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 4mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 5mm, and the width D1 of the inert gas protection passage 13 was set to 1 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 40 degrees. After seeing that a complete casting blank 14 appears, a worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 100l/min, and simultaneously controls a high-pressure inert gas source to feed air into the inert gas inlet hole 12, so that nitrogen surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
EXAMPLE seven
Phi 150 TU1 copper pipe horizontal continuous casting
The gap D1 between the front cover plate 1 and the rear cover plate 3 was adjusted to 3mm by adjusting the coupling bolts 9 and the elastic washers 10, the width D2 of the outlet portion of the water jetting hole 6 was 4mm, and the width D1 of the inert gas protection passage 13 was set to 0.8 mm. The included angle theta between the water spraying direction of the water spraying holes 6 and the generatrix of the casting blank 14 (namely, the included angle between the water spraying direction and the water receiving part on the surface of the casting blank 14) is 40 degrees. After the worker sees that a complete casting blank 14 appears, the worker controls a high-pressure water source to feed water into the water inlet hole 5, the water inlet flow is 70l/min, and simultaneously controls a high-pressure inert gas source to feed water into the inert gas inlet hole 12, so that nitrogen surrounds the surface of the casting blank 14 to form a protective layer, and the surface of the high-temperature casting blank 14 is prevented from being oxidized due to air contact.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model and it is intended to cover in the claims the utility model as defined in the appended claims.
Claims (6)
1. Copper pipe horizontal continuous casting secondary crystallizer to the moving direction during casting blank production is backward, and is backward forward, its characterized in that: the front cover plate is provided with a front center hole for penetrating through a casting blank, and the rear cover plate is provided with a rear center hole for penetrating through the casting blank;
the front cover plate is provided with water inlet holes along the radial direction, water spray holes which incline backwards and face the outer surface of the casting blank are formed by the surrounding of the front cover plate and the rear cover plate, the water spray holes are communicated with the water inlet holes outwards in the radial direction and are communicated with the front center hole and the rear center hole inwards, and the water inlet holes are used for being connected with an external high-pressure water source.
2. A copper tube horizontal continuous casting secondary crystallizer as recited in claim 1, wherein: the section of the rear central hole is in a horn shape with a large rear part and a small front part.
3. A copper tube horizontal continuous casting secondary crystallizer as claimed in claim 1 or claim, wherein: the bolt connecting structure is used for continuously adjusting the width of the outlet part of the water spraying hole on line; the bolt connecting structure comprises a front threaded hole formed in the rear end face of the front cover plate, a rear threaded hole formed in the corresponding position of the rear cover plate, a connecting bolt in threaded fit with the front threaded hole and the rear threaded hole, and an elastic gasket sleeved on the connecting bolt and pressed between the front cover plate and the rear cover plate.
4. A copper tube horizontal continuous casting secondary crystallizer as defined in claim 3, wherein: the back end of the front cover plate is provided with a gasket groove, the front end of the elastic gasket is pressed at the bottom of the gasket groove, and the central line of the gasket groove is perpendicular to the matching surface of the front cover plate and the back cover plate.
5. A copper tube horizontal continuous casting secondary crystallizer as claimed in any one of claims 1 to 4, characterized in that: the front part of the front cover plate is provided with an air inlet hole for introducing inert gas along the radial direction, the front end of the front cover plate is provided with an inert gas protection passage at the radial inner end, the inert gas protection passage is annular and is communicated with the front central hole along the circumferential direction, and the air inlet hole is communicated with the inert gas protection passage; the width of the inert gas protection passage is represented by d1, and d1 is more than or equal to 0.5mm and less than or equal to 1 mm.
6. A copper tube horizontal continuous casting secondary crystallizer as claimed in claim 5, characterized in that: the included angle between the water spraying direction of the water spraying holes and the casting blank bus is theta degrees, and theta is more than or equal to 5 and less than or equal to 40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123206188.XU CN216705884U (en) | 2021-12-20 | 2021-12-20 | Copper pipe horizontal continuous casting secondary crystallizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123206188.XU CN216705884U (en) | 2021-12-20 | 2021-12-20 | Copper pipe horizontal continuous casting secondary crystallizer |
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| Publication Number | Publication Date |
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| CN216705884U true CN216705884U (en) | 2022-06-10 |
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