Conduction oil circulation system used in continuous casting of grid

Abstract

The utility model belongs to the field of grid continuous casting equipment, and particularly relates to a heat conduction oil circulating system used in grid continuous casting, which comprises a heat conduction oil pipe connected with a movable mold and a cooling unit, and is characterized in that the cooling unit comprises a main cooling cavity, a first branch, a second branch and a heat exchanger, two ends of the main cooling cavity are respectively a liquid inlet end and a liquid outlet end, an oil outlet of the heat conduction oil pipe is connected with the liquid inlet end through a first branch, an oil inlet of the heat conduction oil pipe is connected with the liquid outlet end through a second branch, and the heat exchanger is connected with the main cooling cavity. And the heat conduction oil is rapidly cooled, so that the heat conduction oil passing through the movable mold takes away heat of the movable mold in time, and the quality of the grid is improved.

Description

Technical Field

[0001] The utility model belongs to the field of grid continuous casting equipment, and particularly relates to a heat-conducting oil circulation system used in grid continuous casting. Background Art

[0002] In grid continuous casting, molten lead is sprayed by a fixed mold onto a rotating moving mold. After the molten lead cools and solidifies into a grid on the moving mold, it is taken off. Therefore, the control of the temperature of the moving mold is crucial for the quality of the grid product, and the temperature of the moving mold is determined by the temperature of the heat-conducting oil passing through its interior. At present, during the grid continuous casting production process, the heat-conducting oil is driven by an oil pump. The heat-conducting oil passes through the moving mold along the heat-conducting oil pipe and then enters a cold water tank, where the cold water in the cold water tank exchanges heat with the heat-conducting oil. At the same time, a natural wind cooling is combined with a fan for the heat-conducting oil pipe. The cooled heat-conducting oil passes through the moving mold again to complete the cycle. This cooling method cannot cool the temperature of the heat-conducting oil in time, easily causing the temperature of the moving mold to not meet the standard and affecting the quality of the grid. Summary of the Utility Model

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a heat-conducting oil circulation system used in grid continuous casting, which can quickly cool the heat-conducting oil according to the temperature of the moving mold required during the grid continuous casting process, enable the heat-conducting oil passing through the moving mold to take away the heat of the moving mold in time, and improve the quality of the grid.

[0004] The specific technical solution adopted by the utility model is as follows:

[0005] The heat-conducting oil circulation system used in grid continuous casting includes a heat-conducting oil pipe connected to the moving mold and a cooling unit. The key lies in that the cooling unit includes a main cooling chamber, a first branch, a second branch, and a heat exchanger. The two ends of the main cooling chamber are respectively an inlet end and an outlet end. The outlet of the heat-conducting oil pipe is connected to the inlet end through the first branch, and the inlet of the heat-conducting oil pipe is connected to the outlet end through the second branch. The heat exchanger is connected to the main cooling chamber.

[0006] The cooling unit further includes a secondary cooling chamber arranged in parallel with the first branch and the second branch respectively. Valves are respectively arranged on the first branch, the second branch, and the secondary cooling chamber. The heat exchanger is connected to the secondary cooling chamber.

[0007] Heat insulation layers are respectively arranged on the side walls of the main cooling chamber and the secondary cooling chamber.

[0008] The heat exchanger includes a heat exchange pipe arranged in the main cooling chamber, and a compressor, a condenser, and an expansion valve arranged in sequence along the flow direction of the refrigerant. The two ends of the heat exchange pipe are respectively connected to the expansion valve and the compressor.

[0009] The compressor and condenser are installed by means of an installation box. A heat-insulating partition board located between the compressor and the condenser is provided on the installation box, and heat dissipation holes are provided on the side wall of the installation box on the same side as the condenser.

[0010] The beneficial effects of the present utility model are as follows:

[0011] In the present utility model, a cooling unit is used to cool the heat-conducting oil. The heat-conducting oil pipe discharges the heat-conducting oil into the main cooling cavity. The heat exchanger cools the heat-conducting oil in the main cooling cavity, effectively improving the cooling speed of the heat-conducting oil. After the heat-conducting oil is discharged from the main cooling cavity, it enters the heat-conducting oil pipe again and passes through the moving die, thereby realizing the regulation of the temperature of the moving die. This circulation system can quickly cool the temperature of the heat-conducting oil, so as to timely control the temperature of the moving die, meet the requirements for the temperature of the moving die in the grid continuous casting, and improve the quality of the grid. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] In the drawings, 1 is a moving die, 2 is a heat-conducting oil pipe, 3 is a main cooling cavity, 301 is an inlet end, 302 is an outlet end, 4 is a first branch, 5 is a second branch, 6 is a valve, 7 is a secondary cooling cavity, 8 is a heat exchange pipe, 9 is a compressor, 10 is a condenser, 11 is an expansion valve, 12 is an installation box, and 13 is a heat-insulating partition board. Specific Embodiments

[0014] The present utility model will be further described below in conjunction with the drawings and specific embodiments:

[0015] Specific embodiments are as Figure 1 shown. The heat-conducting oil circulation system used in the grid continuous casting includes a heat-conducting oil pipe 2 connected to the moving die 1 and a cooling unit. The key is that the cooling unit includes a main cooling cavity 3, a first branch 4, a second branch 5, and a heat exchanger. The two ends of the main cooling cavity 3 are respectively an inlet end 301 and an outlet end 302. The oil outlet of the heat-conducting oil pipe 2 is connected to the inlet end 301 through the first branch 4, and the oil inlet is connected to the outlet end 302 through the second branch 5. The heat exchanger is connected to the main cooling cavity 3.

[0016] The heat exchanger continuously cools the main cooling cavity 3. The heat-conducting oil in the heat-conducting oil pipe 2 is discharged into the main cooling cavity 3 from the inlet end 301 through the first branch 4. Since the heat-conducting oil pipe 2 realizes the circulation of the heat-conducting oil through an oil pump to cool the moving die 1, under the action of the oil pump, the heat-conducting oil is forced to flow in the main cooling cavity 3. The cooled main cooling cavity 3 exchanges heat with the heat-conducting oil, effectively improving the cooling speed of the heat-conducting oil. After the heat-conducting oil is discharged from the outlet end 302 of the main cooling cavity 3, it enters the heat-conducting oil pipe 2 again along the second branch 5 and passes through the moving die 1, thereby realizing the regulation of the temperature of the moving die 1.

[0017] The described cooling unit further includes a secondary cooling chamber 7 that is arranged in parallel with the first branch 4 and the second branch 5 respectively. Valves 6 are respectively arranged on the first branch 4, the second branch 5, and the secondary cooling chamber 7. The heat exchanger is connected to the secondary cooling chamber 7 to cool the secondary cooling chamber 7. In this embodiment, the first branch 4 is located on the left side of the main cooling chamber 3, and the second branch 5 is located on the right side of the main cooling chamber 3. By means of the valves 6, it is possible to control whether the heat-conducting oil passes through the secondary cooling chamber 7, that is, to control the length of the cooling path of the heat-conducting oil in the cooling unit, so as to realize the adjustment of the cooling temperature of the heat-conducting oil. Specifically, when the valves 6 on the first branch 4 and the second branch 5 are opened and the valve 6 on the secondary cooling chamber 7 is closed, the flow direction of the heat-conducting oil after being discharged from the heat-conducting oil pipe 2 is to sequentially pass through the first branch 4, the main cooling chamber 3, and the second branch 5, and then enter the heat-conducting oil pipe 2; when the valves 6 on the first branch 4 and the second branch 5 are closed and the valves 6 on each secondary cooling chamber 7 are opened, the flow direction of the heat-conducting oil after being discharged from the heat-conducting oil pipe 2 is to sequentially pass through the secondary cooling chamber 7 in parallel with the first branch 4 and then enter the main cooling chamber 3, and then enter the secondary cooling chamber 7 in parallel with the second branch 5, and finally enter the heat-conducting oil pipe 2; when the valve 6 on the first branch 4 is closed, the valve 6 on the secondary cooling chamber 7 in parallel with the first branch 4 is opened, the valve on the second branch 5 is opened, and the valve 6 on the secondary cooling chamber 7 in parallel with the second branch 5 is closed, the flow direction of the heat-conducting oil after being discharged from the heat-conducting oil pipe 2 is, first, to pass through the secondary cooling chamber 7 in parallel with the first branch 4, then enter the main cooling chamber 3, and finally be discharged to the heat-conducting oil pipe 2 through the second branch 5; when the valve 6 on the first branch 4 is opened, the valve 6 on the secondary cooling chamber 7 in parallel with the first branch 4 is closed, the valve 6 on the second branch 5 is closed, and the valve 6 on the secondary cooling chamber 7 in parallel with the second branch 5 is opened, the flow direction of the heat-conducting oil after being discharged from the heat-conducting oil pipe 2 is, first, to enter the main cooling chamber 3 along the first branch 4, then enter the secondary cooling chamber 7 in parallel with the second branch 5, and finally be discharged to the heat-conducting oil pipe 2 from this secondary cooling chamber 7. By controlling the opening and closing of each valve 6 and the switch of the cooling control unit 4, it is possible to adjust and control the cooling speed of the heat-conducting oil, meet the different temperature requirements of the heat-conducting oil at different stages during the initial operation and normal operation of the moving die 1, ensure that the moving die 1 can normally carry out grid continuous casting, improve the grid quality, and at the same time avoid energy waste.

[0018] Heat insulation layers are respectively arranged on the side walls of the main cooling chamber 3 and the secondary cooling chamber 7. The heat insulation layers can improve the heat insulation ability of the main cooling chamber 3 and the secondary cooling chamber 7 and reduce the temperature exchange between the main cooling chamber 3 and the secondary cooling chamber 7 and the outside.

[0019] The heat exchanger described above includes heat exchange tubes 8, and a compressor 9, a condenser 10, and an expansion valve 11 arranged in sequence along the flow direction of the refrigerant. The two ends of the heat exchange tubes 8 are respectively connected to the expansion valve 11 and the compressor 9. The main cooling chamber 3 and the secondary cooling chamber 7 are respectively connected with heat exchangers. The heat exchange tubes 8 of each heat exchanger are respectively arranged in the main cooling chamber 3 and the secondary cooling chamber 7 and extend from the main cooling chamber 3 and the secondary cooling chamber 7 to the outside to be connected with the compressor 9 and the expansion valve 11.

[0020] The compressor 9 compresses and boosts the pressure of the refrigerant. The high-temperature and high-pressure refrigerant enters the condenser 10 to cool down, and then is sprayed into the heat exchange tubes 8 through the expansion valve 11 to absorb the heat of the heat-conducting oil, realizing the heat exchange between the heat exchange tubes 8 and the heat-conducting oil, and quickly cooling down the heat-conducting oil. The refrigerant in this embodiment is ammonia. An oil separator is arranged between the compressor 9 and the condenser 10 to separate the refrigerating oil carried out by the ammonia from the compressor 9. Then the ammonia enters the condenser 10 and is condensed into liquid ammonia. The liquid ammonia enters the liquid storage tank, and the liquid storage tank supplies liquid ammonia to the expansion valve 11. The compressor 9 is connected to a pressure controller. The high-pressure end of the pressure controller is connected to the exhaust port of the compressor 9, and the low-pressure end is connected to the suction port of the compressor 9, which is used to prevent the condensation pressure from being too high or the intake pressure from being too low, and avoid damage to the heat exchanger.

[0021] The heat exchange tubes 8 are spiral coil tubes or corrugated coil tubes, which increase the contact area between the heat exchange tubes 8 and the heat-conducting oil in the main cooling chamber 3 or the secondary cooling chamber 7, contribute to shortening the setting length of the main cooling chamber 3 and the secondary cooling chamber 7, and reducing the occupied area of the cooling unit in the workshop.

[0022] The compressor 9 and the condenser 10 are installed by means of an installation box 12. A heat insulation partition plate 13 located between the compressor 9 and the condenser 10 is arranged on the installation box 12. Heat dissipation holes are arranged on the side wall of the installation box 12 on the same side as the condenser 10. The heat insulation partition plate 45 divides the installation box 44 into two chambers, while reducing the heat transfer between the two chambers, preventing the working environment temperature of the condenser 10 from being too high. The heat dissipation holes timely dissipate the heat generated by the operation of the condenser 10 to the external environment, further preventing the temperature of the working environment of the condenser 10 from being too high.

[0023] The heat-conducting oil circulation system used in the grid continuous casting related to the present utility model can timely adjust the cooling speed of the heat-conducting oil according to the different temperatures required by the moving die 1, enable the heat-conducting oil to timely take away the heat on the moving die 1, is easy to control, and helps to improve the quality of the grid in the continuous casting operation.

Claims

1. A heat transfer oil circulation system for grid continuous casting, comprising a heat transfer oil pipe (2) connected to a moving mold (1) and a cooling unit, characterized in that: The cooling unit comprises a main cooling chamber (3), a first branch (4), a second branch (5) and a heat exchanger; the two ends of the main cooling chamber (3) are respectively a liquid inlet end (301) and a liquid outlet end (302); the oil outlet of the heat transfer oil pipe (2) is connected to the liquid inlet end (301) by means of the first branch (4), and the oil inlet is connected to the liquid outlet end (302) by means of the second branch (5); and the heat exchanger is connected to the main cooling chamber (3).

2. The heat transfer oil circulation system for grid continuous casting according to claim 1, characterized in that: The cooling unit further comprises an auxiliary cooling chamber (7) which is respectively arranged in parallel with the first branch (4) and the second branch (5); valves (6) are respectively arranged on the first branch (4), the second branch (5) and the auxiliary cooling chamber (7); and the heat exchanger is connected to the auxiliary cooling chamber (7).

3. The heat transfer oil circulation system for grid continuous casting according to claim 2, characterized in that: Thermal insulation layers are respectively provided on the side walls of the main cooling chamber (3) and the auxiliary cooling chamber (7).

4. The heat transfer oil circulation system for grid continuous casting according to claim 1, characterized in that: The heat exchanger comprises a heat exchange tube (8) arranged in a main cooling chamber (3), and comprises a compressor (9), a condenser (10) and an expansion valve (11) arranged in sequence along the flow direction of the refrigerant, and the two ends of the heat exchange tube (8) are respectively connected to the expansion valve (11) and the compressor (9).

5. The heat transfer oil circulation system for grid continuous casting according to claim 4, characterized in that: The compressor (9) and condenser (10) are installed with the aid of an installation box (12). The installation box (12) is provided with a heat-insulating partition plate (13) located between the compressor (9) and the condenser (10). The side wall of the installation box (12) on the same side as the condenser (10) is provided with heat dissipation holes.

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