Up-drawing continuous casting protection cover

Abstract

The utility model belongs to the technical field of casting, and particularly relates to an up-drawing continuous casting protective cover. The upward continuous casting protective cover comprises a shell, a plurality of first through holes are formed in the shell, one end of a crystallizer and one end of a thermocouple penetrate through the first through holes to stretch into the lower portion of the shell, the other end of the crystallizer and the other end of the thermocouple are both located above the shell, and an air inlet connector and a pressure gauge connector are further formed in the shell. The upward continuous casting protection cover can seal the upper space of the heat preservation bin, the heat preservation and oxygen isolation effects are good, and the purity and quality of an oxygen-free copper rod are effectively improved; in addition, the oxygen-free copper rod can be more attached to the inner wall of the crystallizer through the micro-positive-pressure environment, the bamboo joint line phenomenon occurring in the crystallization up-drawing process can be relieved, the surface of the obtained oxygen-free copper rod is compact, and the bamboo joint lines are slight.

Description

Technical Field

[0001] The utility model belongs to the technical field of casting, and in particular relates to an upward continuous casting protective cover. Background Art

[0002] Upward continuous casting is a common method for producing oxygen-free copper wire. When using upward continuous casting to produce oxygen-free copper rods, the furnace group is usually divided into a melting chamber, a transition chamber and a holding chamber. The raw materials are added to the melting chamber, and after melting, they flow into the holding chamber through the transition chamber, and are formed by upward casting through the crystallizer in the holding chamber. In order to isolate the air, the melting chamber and the transition chamber are usually covered with charcoal, and the holding chamber is covered with flake graphite. The crystallizer is inserted below the liquid level in the holding chamber, and the molten copper solidifies after encountering the lower temperature ingot head extending from the crystallizer, and is formed by the forming mold during the pulling process of the pulling device.

[0003] However, this existing operation method has the following defects: (1) Since the crystallization process is completed under normal pressure, the surface of the copper rod will inevitably show obvious bamboo knots as the upper pulling device pulls at a fixed frequency; and in order to prevent cracks caused by bamboo knots during subsequent cold processing such as extrusion and drawing, the peeling thickness has to be increased in subsequent production, which reduces the yield rate of the wire; (2) The protection is not thorough, the oxygen isolation effect of the flake graphite needs to be improved, and the product will have weak oxides. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present utility model is to provide an upward continuous casting protective cover.

[0005] To achieve the above objectives, the technical solutions adopted are:

[0006] A top-lead continuous casting protective cover comprises a shell, wherein the shell is provided with a plurality of first through holes, one end of a crystallizer and a thermocouple respectively passes through the respective first through holes and extends into the bottom of the shell, and the other ends of the crystallizer and the thermocouple are both located above the shell, and the shell is also provided with an air inlet interface and a pressure gauge interface.

[0007] On the basis of the above technical solution, the present invention can also make the following improvements:

[0008] Furthermore, the shell is used to be installed above the insulation bin of the upward continuous casting equipment to form a closed space between the shell and the insulation bin.

[0009] Furthermore, one end of the crystallizer and the thermocouple extends below the liquid level of the insulation bin.

[0010] Furthermore, the shell includes a top cover, a side wall and a mounting edge, the side wall extends downward along the periphery of the top cover to form a downwardly opening accommodating cavity between the side wall and the top cover, and the mounting edge extends outward along the lower edge of the side wall.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the shell is divided into a top cover, a side wall and a mounting edge, rather than being designed as a plane, thereby expanding the internal space of the shell and the insulation bin, and ensuring to a greater extent that the oxygen-free copper rods in the crystallizer are protected by a slight positive pressure.

[0012] Furthermore, the crystallizers are at least arranged as a group, with two crystallizers forming one group.

[0013] The beneficial effects of adopting the above further technical solution are: allowing the equipment to run multiple crystallizers at the same time to improve production efficiency; and by grouping two crystallizers together, management and maintenance can be conveniently performed.

[0014] Furthermore, the mounting edge of the shell is fixed to the connecting plate of the heat preservation bin by a fastener.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that the fastener 1 can be a structure such as a screw, which provides a firm connection and support, ensuring that the shell is stably fixed on the connecting plate of the insulation bin to prevent it from moving or falling off due to vibration or other factors.

[0016] Furthermore, a fixed sealing ring is provided on the top cover, and the crystallizer and the thermocouple are fixed on the top cover through the fixed sealing ring.

[0017] The beneficial effect of adopting the above further technical solution is that the fixed sealing ring provides a mounting and fixing position for the crystallizer and the thermocouple, while ensuring the sealing between these components and the housing.

[0018] Furthermore, the fixed sealing ring is fixed to the top cover by fastener 2.

[0019] The beneficial effect of adopting the above further technical solution is that the fastener 2 can be a structure such as a screw, a bolt, and a nut, which ensures a firm connection between the fixed sealing ring and the housing and enhances the stability and reliability of the overall structure.

[0020] Furthermore, the fixed sealing ring includes two relatively arranged fixed sealing half rings, the two relatively arranged fixed sealing half rings form a group, and each crystallizer or thermocouple is sealed and mounted on the top cover through a group of the fixed sealing half rings.

[0021] The beneficial effect of adopting the above further technical solution is that this relative arrangement design makes it easier to install and remove the crystallizer or thermocouple, and each set of fixed sealing half rings specifically corresponds to a crystallizer or thermocouple, ensuring the accuracy and sealing of the installation.

[0022] Furthermore, the two fixed sealing half rings are connected via a fastener three, and the fastener three is located in a second through hole that runs through the two oppositely arranged fixed sealing half rings.

[0023] The beneficial effect of adopting the above further technical solution is that the fastener three can be a structure such as a screw, a bolt, and a nut. The fastener three ensures a tight connection between the two relatively arranged fixed sealing half rings, thereby enhancing the overall sealing effect.

[0024] Furthermore, a first sealing ring is provided between the fixed sealing ring and the top cover, a second sealing ring is provided between the thermocouple or the crystallizer and the fixed sealing ring, and a third sealing ring is provided between the mounting edge of the shell and the connecting plate of the insulation bin.

[0025] The beneficial effect of adopting the above further technical solution is that the first sealing ring, the second sealing ring and the third sealing ring can be O-rings, which respectively enhance the sealing effect between the fixed sealing ring and the shell, between the thermocouple or crystallizer and the fixed sealing ring, and between the shell and the insulation bin.

[0026] Furthermore, an observation window is provided on the shell.

[0027] The beneficial effect of adopting the above-mentioned further technical solution is that the observation window allows the operator to directly observe the working conditions inside the insulation bin, such as the crystallization process, liquid flow, etc., without opening the upper continuous casting protective cover, which provides convenience for equipment monitoring and maintenance.

[0028] Furthermore, the air inlet port and the observation window are located on the side wall of the shell.

[0029] The beneficial effect of adopting the above further technical solution is that the air inlet interface is designed on the side wall so that the gas can be more evenly distributed in the space inside the protective cover and the insulation chamber.

[0030] Furthermore, the pressure gauge interface is connected to an overpressure prevention type pressure gauge.

[0031] Compared with the prior art, the beneficial effects of the utility model are:

[0032] The upward continuous casting protective cover of the utility model can seal the upper space of the insulation bin, with good insulation effect. Compared with covering with flake graphite, it has better oxygen isolation effect, the product has low oxygen content, and effectively improves the purity and quality of the oxygen-free copper rod; and the protective cover shell is provided with an air inlet interface and a pressure gauge interface, which are respectively used to connect inert gases such as argon and to connect an overpressure prevention type pressure gauge to observe the pressure situation. An inert gas with a positive pressure difference of 10 to 20 KPa is introduced into the insulation bin through the pressure gauge interface, and the slightly positive pressure environment can make the oxygen-free copper rod fit better with the inner wall of the crystallizer, which is conducive to alleviating the bamboo knot pattern phenomenon occurring in the crystallization upward process, and the obtained oxygen-free copper rod has a tight surface and slight bamboo knot pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a top view of an upward continuous casting protective cover of the utility model;

[0034] Figure 2 For along Figure 1 A cross-sectional view of the continuous casting equipment including the upward continuous casting protective cover in the middle DD direction;

[0035] Figure 3 for Figure 2 Enlarged view of point F in the middle;

[0036] Figure 4 for Figure 2 A cross-sectional view of the crystallizer and the fixed sealing half ring along the EE direction;

[0037] Figure 5 for Figure 1 The cross-sectional view of the middle thermocouple and the top cover along the AA direction;

[0038] Figure 6 for Figure 1 Cross-sectional view of the middle crystallizer and the top cover along the BB direction;

[0039] The reference numerals are:

[0040] 1. Shell; 102. Air inlet interface; 103. Pressure gauge interface; 104. Fastener one; 105. Fixed sealing half ring; 106. Fastener two; 107. Fastener three; 108. Second through hole; 111. Top cover; 112. Side wall; 113. Mounting edge; 2. Insulation chamber; 3. Crystallizer; 4. Thermocouple; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 8. Observation window; 9. Melting chamber; 10. Transition chamber; 11. Charcoal; 12. Connecting plate. DETAILED DESCRIPTION

[0041] The present invention is described below in conjunction with examples, which are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Reference Figures 1 to 6 A top continuous casting protective cover comprises a shell 1, wherein the shell 1 is provided with a plurality of first through holes, wherein one end of a crystallizer 3 and a thermocouple 4 respectively passes through the respective first through holes and extends into the bottom of the shell 1, and the other ends of the crystallizer 3 and the thermocouple 4 are located above the shell 1, and an air inlet interface 102 and a pressure gauge interface 103 are provided on the shell 1.

[0045] In this embodiment, the shell 1 is used to be installed above the insulation bin 2 of the upward continuous casting equipment to form a closed space between the shell 1 and the insulation bin 2.

[0046] Specifically, one end of the crystallizer 3 and the thermocouple 4 extends below the liquid level of the heat preservation bin 2 .

[0047] As a preferred embodiment, the shell 1 includes a top cover 111, a side wall 112 and a mounting edge 113. The side wall 112 extends downward along the periphery of the top cover 111 to form a downward-opening accommodating cavity between the side wall 112 and the top cover 111. The mounting edge 113 extends outward along the lower edge of the side wall 112.

[0048] In an optional embodiment, the crystallizer 3 is at least arranged as a group, and two crystallizers 3 form a group. Figure 1 The situation of a group of crystallizers 3 is shown in FIG.

[0049] As a preferred embodiment, the mounting edge 113 of the shell 1 is fixed to the connecting plate 12 of the heat preservation chamber 2 by a fastener 104 .

[0050] In this embodiment, specifically, a fixed sealing ring is provided on the top cover 111 , and the crystallizer 3 and the thermocouple 4 are fixed on the top cover 111 through the fixed sealing ring.

[0051] In an optional embodiment, the fixed sealing ring is fixed to the top cover 111 via a second fastener 106 .

[0052] In an optional embodiment, the fixed sealing ring includes two relatively disposed fixed sealing half rings 105 , the two relatively disposed fixed sealing half rings 105 form a group, and each crystallizer 3 or thermocouple 4 is sealed and mounted on the top cover 111 through a group of fixed sealing half rings 105 .

[0053] In this embodiment, the two fixed sealing half rings 105 are connected via a fastener three 107 , and the fastener three 107 is located in a second through hole 108 that runs through the two oppositely arranged fixed sealing half rings 105 .

[0054] In this embodiment, a first sealing ring 5 is provided between the fixed sealing ring and the top cover 111, a second sealing ring 6 is provided between the thermocouple 4 or the crystallizer 3 and the fixed sealing ring, and a third sealing ring 7 is provided between the mounting edge 113 of the shell 1 and the connecting plate 12 of the insulation bin 2.

[0055] In this embodiment, the first sealing ring 5, the second sealing ring 6, and the third sealing ring 7 are O-rings. The first sealing ring 5 is located in the annular mounting groove of the top cover 111, the second sealing ring 6 is located in the annular mounting groove of the fixed sealing ring, and the third sealing ring 7 is located in the mounting groove of the connecting plate 12 of the insulation bin 2.

[0056] Optionally, an observation window 8 is further provided on the housing 1 .

[0057] Optionally, the air inlet port 102 and the observation window 8 are located on a side wall 112 of the housing 1 .

[0058] Optionally, the pressure gauge interface 103 is connected to an overpressure prevention type pressure gauge.

[0059] During operation, when using upward continuous casting to produce oxygen-free copper rods, materials are added to the melting bin 9, and the raw materials flow into the insulation bin 2 through the transition bin 10 after melting. The molten copper in the melting bin 9 and the transition bin 10 are covered with charcoal 11, and inert gas is introduced through the air inlet interface 102 on the shell 1 of the upward continuous casting protection cover, and the pressure is observed through an overpressure prevention type pressure gauge connected to the pressure gauge interface 103 on the shell 1, so that an environment filled with 10-20KPa positive pressure difference inert gas is achieved in the insulation bin 2, and the crystallizer 3 is inserted below the liquid level in the insulation bin 2. The molten copper solidifies after encountering the lower temperature ingot head extending from the crystallizer 3, and is formed by the forming mold during the pulling process of the pulling device.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective cover for upward continuous casting, characterized in that: It includes a shell, which is provided with a plurality of first through holes. One end of the crystallizer and the thermocouple respectively passes through the respective first through holes and extends into the bottom of the shell. The other ends of the crystallizer and the thermocouple are both located above the shell. The shell is also provided with an air inlet interface and a pressure gauge interface.

2. The upward continuous casting protective cover according to claim 1, characterized in that: The shell comprises a top cover, a side wall and a mounting edge. The side wall extends downward along the periphery of the top cover to form a downwardly opening accommodating cavity with the top cover. The mounting edge extends outward along the lower edge of the side wall.

3. The upward continuous casting protective cover according to claim 1, characterized in that: The crystallizers are arranged in at least one group, and two crystallizers form one group.

4. The upward continuous casting protective cover according to claim 2, characterized in that: The top cover is provided with a fixed sealing ring, and the crystallizer and the thermocouple are fixed on the top cover through the fixed sealing ring.

5. The upward continuous casting protective cover according to claim 4, characterized in that: The fixed sealing ring is fixed on the top cover by fastener 2.

6. The upward continuous casting protective cover according to claim 4 or 5, characterized in that: The fixed sealing ring comprises two fixed sealing half rings arranged opposite to each other, the two fixed sealing half rings arranged opposite to each other form a group, and each crystallizer or thermocouple is sealed and mounted on the top cover through a group of the fixed sealing half rings.

7. The upward continuous casting protective cover according to claim 6, characterized in that: The two fixed sealing half rings are connected via a fastener three, and the fastener three is located in a second through hole that runs through the two oppositely arranged fixed sealing half rings.

8. The upward continuous casting protective cover according to claim 4, characterized in that: A first sealing ring is provided between the fixed sealing ring and the top cover, a second sealing ring is provided between the thermocouple or the crystallizer and the fixed sealing ring, and a third sealing ring is provided between the mounting edge of the shell and the connecting plate of the heat preservation bin.

9. The upward continuous casting protective cover according to claim 2, characterized in that: The shell body is also provided with an observation window.

10. The upward continuous casting protective cover according to claim 9, characterized in that: The air inlet interface and the observation window are located on the side wall of the shell.

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