Horizontal continuous casting copper-clad steel iron circuit contact line production equipment, process and product

Abstract

The invention discloses horizontal continuous casting copper-clad steel iron circuit contact line production equipment, a process and a product, and belongs to the technical field of contact line manufacturing. The horizontal continuous casting copper-clad steel iron circuit contact line production equipment comprises a pay-off machine, a straightening unit, a preheating furnace, a heating smelting furnace, a crystallization mold, a cooling unit, a rolling unit, a drawing unit and a take-up machine which are arranged in sequence. The straightening unit is used for straightening the steel elements after paying off, and the preheating furnace is used for preheating the steel elements after paying off; a melting cavity is formed in the heating melting furnace, molten copper is contained in the melting cavity, a feeding section of the crystallization mold is detachably arranged on the heating melting furnace and communicates with the melting cavity, a steel element in the melting cavity is heated to 1180-1250 DEG C, a discharging section of the crystallization mold extends out of the heating melting furnace, and the crystallization mold is used for crystallizing copper on the surface of the steel element. According to the horizontal continuous casting copper-clad steel iron circuit contact line production equipment, it can be guaranteed that a 2-3 mm composite layer is formed at the copper-steel contact position, and metallurgical bonding between molecules is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of catenary manufacturing, and particularly relates to a production device, process and product of a horizontally continuous-cast copper-clad steel railway catenary. Background Art

[0002] The copper-clad steel catenary is a common type of high-speed railway catenary. In terms of performance, it combines the high strength and high-temperature softening resistance of steel with the high electrical conductivity and low contact resistance of copper. Therefore, it has the characteristics of high conduction efficiency, low material cost, high tensile breaking force, light weight and wear resistance, meeting the requirements of high-speed train operation.

[0003] Currently, the most common copper-clad steel catenary products on the market are electroplated copper-clad steel catenaries and coated copper-clad steel catenaries. However, whether it is an electroplated copper-clad steel catenary or a coated copper-clad steel catenary, due to the obvious interface between copper and steel, the copper-steel combination is not firm enough to achieve metallurgical bonding between molecules, resulting in the easy occurrence of copper layer bulging and breaking during the subsequent continuous extrusion and drawing processes. Summary of the Invention

[0004] Aiming at the above defects or improvement requirements of the prior art, the present invention provides a production device, process and product of a horizontally continuous-cast copper-clad steel railway catenary, aiming to: not only continuously process the copper-clad steel catenary, but also ensure that a 2-3 mm composite layer is formed at the copper-steel contact, achieving metallurgical bonding between molecules, thereby effectively avoiding the problems of copper layer bulging and breaking during the subsequent continuous extrusion and drawing processes.

[0005] To achieve the above object, in a first aspect, the present invention provides a production device of a horizontally continuous-cast copper-clad steel railway catenary, which includes a wire pay-off machine, a straightening unit, a preheating furnace, a heating furnace, a crystallizing die, a cooling unit, a rolling unit, a drawing unit and a wire take-up machine arranged in sequence;

[0006] The wire pay-off machine is used for paying off the wire rod so that the steel wire after pay-off passes through the straightening unit and the preheating furnace in sequence and then enters the heating furnace. The straightening unit is used for straightening the steel wire after pay-off, and the preheating furnace is used for preheating the steel wire after pay-off;

[0007] The heating furnace has a melting cavity therein, and there is molten copper in the melting cavity. The feeding section of the crystallization mold is detachably arranged on the heating furnace and communicates with the melting cavity. The steel element in the melting cavity is heated to 1180 - 1250 °C. The discharging section of the crystallization mold extends out of the heating furnace. The crystallization mold is used for crystallizing copper on the surface of the steel element. The cooling unit is used for cooling down the copper-clad steel after crystallization. The rolling unit is used for rolling the copper-clad steel. The drawing unit is used for drawing the copper-clad steel. The wire take-up machine is used for taking up the copper-clad steel contact wire.

[0008] Optionally, a size calibration unit is arranged in the melting cavity, and the size calibration unit is used for calibrating the size of the steel element entering the crystallization mold.

[0009] Optionally, a control sleeve is arranged in the melting cavity. The control sleeve is sleeved on the outer periphery of the steel element and is arranged at an interval from the steel element. A plurality of atomic channels are arranged on the control sleeve. Each atomic channel is configured such that copper atoms on the outside can enter the inside of the control sleeve through the atomic channel, and iron atoms on the inside cannot enter the outside of the control sleeve through the atomic channel.

[0010] Optionally, the temperature in the preheating furnace is 500 - 800 °C.

[0011] Optionally, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a welding machine unit. The welding machine unit is located between the wire pay-off machine and the straightening unit, and the welding machine unit is used for welding steel elements on different coils.

[0012] Optionally, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a polishing and grinding unit. The polishing and grinding unit is located between the straightening unit and the preheating furnace, and the polishing and grinding unit is used for polishing and grinding the surface of the steel element.

[0013] Optionally, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a speed sensor, a controller, and an alarm. The speed sensor is located between the straightening unit and the preheating furnace. The speed sensor is used for detecting the traveling speed of the steel element. The speed sensor, the controller, and the alarm are electrically connected in sequence.

[0014] Optionally, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes an intermediate wire take-up machine and a wire reel. The intermediate wire take-up machine is arranged behind the cooling unit. The intermediate wire take-up machine is used for taking up the copper-clad steel after cooling down and obtaining copper-clad steel coils. The wire reel is arranged in front of the rolling unit. The wire reel is used for paying off the copper-clad steel coils.

[0015] In a second aspect, the present invention provides a production process for horizontally continuous casting copper-clad steel railway contact wires. The production process for horizontally continuous casting copper-clad steel railway contact wires is based on the production equipment for horizontally continuous casting copper-clad steel railway contact wires described in the first aspect. The production process for horizontally continuous casting copper-clad steel railway contact wires includes:

[0016] Place the wire rod on the wire pay-off machine. After pay-off, the steel wire passes through the straightening unit and the preheating furnace in sequence and then enters the heating furnace.

[0017] The molten copper in the melting cavity coats the surface of the steel wire and crystallizes copper in the crystallization mold to form copper-clad steel.

[0018] The crystallized copper-clad steel passes through the cooling unit, the rolling unit, the drawing unit and the wire take-up machine in sequence to obtain a copper-clad steel contact wire.

[0019] In a third aspect, the present invention provides a horizontally continuous casting copper-clad steel railway contact wire product, which is prepared by using the production equipment for horizontally continuous casting copper-clad steel railway contact wires described in the first aspect.

[0020] As long as the above improved technical features do not conflict with each other, they can be combined with each other.

[0021] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present invention include:

[0022] For a production device of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention, when producing the copper-clad steel contact wire, first, the wire rod is payed off on a pay-off machine, so that the steel element is first straightened in terms of size on a straightening unit to ensure the axial direction and diameter of the steel element. Then, the steel element enters a preheating furnace for preheating, so that the steel element is preheated in advance before entering the heating furnace, thereby reducing the heating time in the heating furnace and avoiding an overly large size of the heating furnace. Next, the steel element enters the heating furnace, and the steel element is further heated to 1180-1250 °C. At this time, free iron atoms are formed on the surface of the steel element. When the steel element enters the crystallization die, during the process of copper water coating the surface of the steel element, copper atoms and iron atoms penetrate and combine with each other at the copper-steel joint, and a 2-3 mm composite layer is formed at the copper-steel contact. The copper-steel bonding strength is large, reaching metallurgical bonding between molecules, and equal-section extension of copper and steel is achieved during subsequent continuous extrusion and drawing processes, thereby effectively avoiding problems such as copper layer bulging and breaking during subsequent continuous extrusion and drawing processes. Finally, the crystallized copper-clad steel passes through a cooling unit, a rolling unit, a drawing unit, and a take-up machine in sequence to obtain the copper-clad steel contact wire. Among them, the cooling unit can cool the crystallized copper-clad steel, and the rolling unit can roll the copper-clad steel, which can not only fully refine the organizational structure but also increase the wear resistance and tensile strength of the copper-clad steel. The drawing unit can draw to obtain the specified size, and the take-up machine can wind up the finally obtained copper-clad steel contact wire.

[0023] That is to say, a production device of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention can not only horizontally and continuously process the copper-clad steel contact wire but also ensure that a 2-3 mm composite layer is formed at the copper-steel contact, reaching metallurgical bonding between molecules, thereby effectively avoiding problems such as copper layer bulging and breaking during subsequent continuous extrusion and drawing processes. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a production device of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention;

[0025] Figure 2 is an assembly schematic diagram of the rolling unit provided by an embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of the heating furnace provided by an embodiment of the present invention;

[0027] Figure 4 is a flow chart of a production process of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention.

[0028] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0029] 1. Pay-off machine; 2. Straightening unit; 3. Preheating furnace; 4. Heating melting furnace; 41. Melting cavity; 42. Dimension calibration unit; 43. Control sleeve; 5. Crystallization die; 6. Cooling unit; 7. Rolling unit; 8. Drawing unit; 9. Take-up machine; 10. Welding machine unit; 11. Polishing and grinding unit; 12. Alarm; 13. Intermediate take-up machine; 14. Pay-off reel; 15. Traction roller; 16. Pinch roll unit; 100. Steel element. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] Embodiment:

[0036] Figure 1 FIG. 7 is a schematic structural diagram of a production device for a horizontally continuous-cast copper-clad steel railway contact wire provided by an embodiment of the present invention. Figure 2 FIG. 9 is an assembly schematic diagram of a rolling unit provided by an embodiment of the present invention. With reference to Figure 1 and Figure 2 shown, the production device for the horizontally continuous-cast copper-clad steel railway contact wire includes a wire pay-off machine 1, a straightening unit 2, a preheating furnace 3, a heating furnace 4, a crystallizing die 5, a cooling unit 6, a rolling unit 7, a drawing unit 8 and a wire take-up machine 9 which are arranged in sequence.

[0037] The wire pay-off machine 1 is used for paying off the wire rod so that the steel wire rod 100 after pay-off sequentially passes through the straightening unit 2 and the preheating furnace 3 and then enters the heating furnace 4. The straightening unit 2 is used for straightening the steel wire rod 100 after pay-off, and the preheating furnace 3 is used for preheating the steel wire rod 100 after pay-off.

[0038] The heating furnace 4 has a melting cavity 41, and there is molten copper in the melting cavity 41. The feeding section of the crystallizing die 5 is detachably arranged on the heating furnace 4 and communicates with the melting cavity 41. The steel wire rod 100 in the melting cavity 41 is heated to 1180 - 1250 °C. The discharging section of the crystallizing die 5 extends out of the heating furnace 4. The crystallizing die 5 is used for crystallizing copper on the surface of the steel wire rod 100. The cooling unit 6 is used for cooling and temperature reduction of the crystallized copper-clad steel. The rolling unit 7 is used for rolling the copper-clad steel, and the drawing unit 8 is used for drawing the copper-clad steel. The wire take-up machine 9 is used for taking up the copper-clad steel contact wire.

[0039] For a production equipment of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention, when producing the copper-clad steel contact wire, first, the wire rod is payed off on a pay-off machine 1, so that the steel element 100 is first straightened in size on a straightening unit 2 to ensure the axial direction and diameter of the steel element 100. Then, the steel element 100 enters a preheating furnace 3 for preheating, so that the steel element 100 is preheated in advance before entering a heating furnace 4, thereby reducing the heating time in the heating furnace 4 and avoiding an over-large size of the heating furnace 4. Next, the steel element 100 enters the heating furnace 4, and the steel element 100 is further heated to 1180-1250 °C. At this time, free iron atoms are formed on the surface of the steel element 100. When the steel element 100 enters a crystallization die 5, during the process of copper water coating the surface of the steel element 100, copper atoms and iron atoms penetrate and combine with each other at the copper-steel joint, and a 2-3 mm composite layer is formed at the copper-steel contact. The copper-steel bonding strength is large, reaching the metallurgical bonding between molecules, and equal-section extension of copper and steel is realized during the subsequent continuous extrusion and drawing processes, thereby effectively avoiding the problems of copper layer bulging and breaking during the subsequent continuous extrusion and drawing processes. Finally, the crystallized copper-clad steel passes through a cooling unit 6, a rolling unit 7, a drawing unit 8 and a take-up machine 9 in sequence to obtain the copper-clad steel contact wire. Among them, the cooling unit 6 can cool the crystallized copper-clad steel, and the rolling unit 7 can roll the copper-clad steel, which can not only fully refine the tissue structure, but also increase the wear resistance and tensile strength of the copper-clad steel. The drawing unit 8 can draw to obtain a specified size, and the take-up machine 9 can wind up the finally obtained copper-clad steel contact wire (i.e., the horizontally continuous cast copper-clad steel railway contact wire product).

[0040] That is to say, the production equipment of a horizontally continuous cast copper-clad steel railway contact wire provided by an embodiment of the present invention can not only horizontally and continuously process the copper-clad steel contact wire, but also ensure that a 2-3 mm composite layer is formed at the copper-steel contact, reaching the metallurgical bonding between molecules, thereby effectively avoiding the problems of copper layer bulging and breaking during the subsequent continuous extrusion and drawing processes.

[0041] It should be noted that in the production equipment of the horizontally continuous cast copper-clad steel railway contact wire provided by the present invention, the walking path of the steel element 100 between the straightening unit 2 and the cooling unit 6 is a straight line, thereby avoiding breakage of the heated steel element 100 after bending. The product produced by this horizontally continuous cast copper-clad steel railway contact wire production equipment has fine grains, which can reach below 5 mm, and has the characteristics of high strength, good toughness, wear resistance, corrosion resistance, temperature rise resistance, fatigue resistance, vibration resistance and good current collection, etc.

[0042] In addition, the heating furnace 4 is a heating device, which heats copper into copper water (the temperature of the copper water can be controlled at about 1200 °C) and then enters a melting cavity 41.

[0043] It should be noted that the straightening unit 2 can not only achieve straightening in the left-right and front-back directions, but also achieve flipping straightening. In addition, the crystallization mold 5 can control the thickness of the copper layer. When copper layers of different thicknesses need to be formed, the corresponding crystallization mold 5 can be replaced.

[0044] Exemplarily, the thickness of the copper layer can be 3mm, 5mm, 10mm, etc., and the present invention does not limit this.

[0045] Figure 3 It is a cross-sectional view of the heating furnace provided by an embodiment of the present invention, as Figure 3 shown, a size calibration unit 42 is arranged in the melting cavity 41, and the size calibration unit 42 is used for calibrating the size of the steel element 100 entering the crystallization mold 5.

[0046] It is easy to understand that when the steel element 100 enters the heating furnace 4, the steel element 100 will deform during the heating process, resulting in the subsequent copper water being unable to uniformly coat the steel element 100. Therefore, the size calibration unit 42 can calibrate the size of the steel element 100 entering the crystallization mold 5 to ensure its accurate size, so as to ensure that the copper water uniformly coats the steel element 100.

[0047] It should be noted that the size calibration unit 42 is a high-strength and high-wear-resistant structure, and it can still maintain its structural strength in the melting cavity 41.

[0048] In addition, a control sleeve 43 is arranged in the melting cavity 41. The control sleeve 43 is sleeved on the outer periphery of the steel element 100 and is arranged at an interval from the steel element 100 (the steel element 100 is located inside the control sleeve 43, while the copper water is located outside the control sleeve 43). A plurality of atomic channels are arranged on the control sleeve 43, and each atomic channel is configured such that the outer copper atoms can enter the inner side of the control sleeve 43 through the atomic channel, and the inner iron atoms cannot enter the outer side of the control sleeve 43 through the atomic channel.

[0049] In the above embodiment, the control sleeve 43 can ensure that the copper atoms can smoothly pass through the control sleeve 43 and then coat the surface of the steel element 100, and at the same time can prevent the iron atoms from crossing the control sleeve 43 and entering the entire copper liquid to contaminate the copper water.

[0050] Exemplarily, the control sleeve 43 can be a polymer structure, and the size calibration unit 42 can be located inside the control sleeve 43.

[0051] In this embodiment, the temperature in the preheating furnace 3 is 500 - 800 °C.

[0052] It should be noted that, the larger the diameter of the steel element 100, the higher the temperature in the preheating furnace 3, or the larger the width of the melting cavity 41, to ensure that the steel element 100 can be heated to 1180 - 1250 °C after walking in the melting cavity 41. Additionally, preheating can also avoid the problem that the steel element 100 directly enters the melting cavity 41 and causes large deformation due to rapid temperature rise.

[0053] Continue to refer to Figure 1 , the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a welding machine unit 10. The welding machine unit 10 is located between the wire pay-off machine 1 and the straightening unit 2, and the welding machine unit 10 is used to weld the steel elements 100 on different coils. The welding machine unit 10 can ensure the continuity of the coating of the steel element 100 and avoid the problem of needing to stop the machine after the wire pay-off of the same coil is completed.

[0054] In addition, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a polishing and grinding unit 11. The polishing and grinding unit 11 is located between the straightening unit 2 and the preheating furnace 3, and the polishing and grinding unit 11 is used to polish and grind the surface of the steel element 100. The polishing and grinding unit 11 can polish and grind the oxide layer on the surface of the steel element 100 to ensure that a 2 - 3 mm composite layer is formed at the subsequent copper-steel contact.

[0055] Furthermore, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a protective gas unit. The protective gas unit is used to blow inert gas around the steel element 100 between the polishing and grinding unit 11 and the preheating furnace 3, and between the preheating furnace 3 and the heating furnace 4 for blowing protection. The protective gas unit can perform blowing protection to prevent the surface of the steel element 100 from reforming an oxide layer.

[0056] Exemplarily, the inert gas can be nitrogen or helium.

[0057] In an implementation manner of the present invention, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a speed sensor (not shown in the figure), a controller, and an alarm 12. The speed sensor is located between the straightening unit 2 and the preheating furnace 3, and the speed sensor is used to detect the walking speed of the steel element 100. The speed sensor, the controller, and the alarm 12 are electrically connected in sequence.

[0058] It is easy to understand that the speed sensor real-time detects the speed of the steel element 100 after straightening. When its speed is significantly greater than or lower than the set threshold (this threshold is the wire take-up speed of the wire take-up machine 9), the speed sensor transmits this signal to the controller, and the controller then generates a corresponding control signal to make the alarm 12 alarm, thereby reminding the operator. The operator can then adjust the straightening speed of the straightening unit 2 for the steel element 100 to make the speed of the steel element 100 consistent in the front and rear sections of the entire equipment.

[0059] In this embodiment, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a cleaning unit (not shown in the figure). The cleaning unit is located between the wire pay-off machine 1 and the straightening unit 2, and is used to clean the surface of the steel element 100 to avoid impurities on the surface of the steel element 100 before cladding.

[0060] Exemplarily, the cleaning agent can be pure water.

[0061] In addition, the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes a drying unit, which is located between the cleaning unit and the straightening unit 2. The drying unit is used to dry the surface of the steel element 100 to ensure the surface of the steel element 100 is dry.

[0062] Continue to refer to Figure 1 and Figure 2 , the horizontal continuous casting copper-clad steel railway contact wire production equipment further includes an intermediate wire take-up machine 13 and a wire reel 14. The intermediate wire take-up machine 13 is arranged behind the cooling unit 6 and is used to take up the copper-clad steel after cooling and obtain copper-clad steel coils. The wire reel 14 is arranged in front of the rolling unit 7 and is used to pay off the copper-clad steel coils.

[0063] In the above embodiment, the intermediate wire take-up machine 13 can take up the copper-clad steel coils of the intermediate semi-finished products, while the wire reel 14 takes up the copper-clad steel contact wire. Since the displacement speed of the steel element 100 in the heating furnace 4 is slow, the wire take-up speed of the intermediate wire take-up machine 13 is slow. However, the rolling speed of the rolling unit 7 is high, and rapid pay-off can be achieved through the wire reel 14 to improve the rolling efficiency.

[0064] Exemplarily, a pinch roll unit 16 is further arranged between the wire reel 14 and the rolling unit 7 for straightening and conveying the copper-clad steel coils.

[0065] Figure 4 is a flowchart of a horizontal continuous casting copper-clad steel railway contact wire production process provided by an embodiment of the present invention. As Figure 4 shown, this horizontal continuous casting copper-clad steel railway contact wire production process is based on the above-mentioned horizontal continuous casting copper-clad steel railway contact wire production equipment. The horizontal continuous casting copper-clad steel railway contact wire production process includes:

[0066] S1. Place the coil on the wire pay-off machine 1, and the released steel element 100 sequentially passes through the straightening unit 2 and the preheating furnace 3 and then enters the heating furnace 4.

[0067] S2. The molten copper in the melting cavity 41 is coated on the surface of the steel element 100 and crystallizes copper in the crystallization mold 5 to form copper-clad steel.

[0068] S3. The crystallized copper-clad steel sequentially passes through the cooling unit 6, the rolling unit 7, the drawing unit 8 and the wire take-up machine 9 to obtain a copper-clad steel contact wire.

[0069] The horizontal continuous casting process for producing copper-clad steel railway contact wire provided by the embodiments of the present invention can not only continuously process the copper-clad steel contact wire, but also ensure that a composite layer with a thickness of 2-3 mm is formed at the copper-steel contact, achieving metallurgical bonding between molecules, thereby effectively avoiding the problems of copper layer bulging and breaking during the subsequent continuous extrusion and drawing processes.

[0070] The embodiments of the present invention also provide a copper-clad steel railway contact wire product, which is prepared by using the above-mentioned horizontal continuous casting production equipment for copper-clad steel railway contact wire.

[0071] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A horizontal continuous casting production equipment for copper-clad steel railway contact wire, characterized in that, The production equipment for horizontally continuous casting copper-clad steel railway contact wire includes a wire pay-off machine (1), a straightening unit (2), a preheating furnace (3), a heating melting furnace (4), a crystallizing die (5), a cooling unit (6), a rolling unit (7), a drawing unit (8) and a wire coiling machine (9) arranged in sequence; The wire pay-off machine (1) is used for paying off the coil stock so that the steel element (100) after pay-off passes through the straightening unit (2) and the preheating furnace (3) in sequence and then enters the heating melting furnace (4). The straightening unit (2) is used for straightening the steel element (100) after pay-off, and the preheating furnace (3) is used for preheating the steel element (100) after pay-off; The heating melting furnace (4) has a melting cavity (41) which contains molten copper. The feeding section of the crystallizing die (5) is detachably arranged on the heating melting furnace (4) and communicates with the melting cavity (41). The steel element (100) in the melting cavity (41) is heated to 1180 - 1250 °C. The discharging section of the crystallizing die (5) extends out of the heating melting furnace (4). The crystallizing die (5) is used for crystallizing copper on the surface of the steel element (100). The cooling unit (6) is used for cooling and temperature reduction of the copper-clad steel after crystallization. The rolling unit (7) is used for rolling the copper-clad steel. The drawing unit (8) is used for drawing the copper-clad steel. The wire coiling machine (9) is used for coiling the copper-clad steel railway contact wire.

2. The production equipment for a horizontally continuous-cast copper-clad steel railway contact wire according to claim 1, characterized in that, A size calibration unit (42) is arranged in the melting cavity (41), and the size calibration unit (42) is used for calibrating the size of the steel element (100) entering the crystallizing die (5).

3. The production equipment for a horizontally continuous cast copper-clad steel railway contact wire according to claim 1, characterized in that, A control sleeve (43) is arranged in the melting cavity (41). The control sleeve (43) is sleeved on the outer periphery of the steel element (100) and is arranged at an interval from the steel element (100). A plurality of atomic channels are arranged on the control sleeve (43). Each of the atomic channels is configured such that the outer copper atoms can enter the inner side of the control sleeve (43) through the atomic channels, and the inner iron atoms cannot enter the outer side of the control sleeve (43) through the atomic channels.

4. The production equipment for a horizontally continuous-cast copper-clad steel railway contact wire according to claim 1, characterized in that, The temperature in the preheating furnace (3) is 500 - 800 °C.

5. The production equipment for a horizontally continuous-cast copper-clad steel railway catenary according to claim 1, characterized in that, The production equipment for horizontally continuous casting copper-clad steel railway contact wire further includes a welding machine unit (10). The welding machine unit (10) is located between the wire pay-off machine (1) and the straightening unit (2), and the welding machine unit (10) is used for welding the steel elements (100) on different coil stocks.

6. The production equipment for the horizontally continuous cast copper-clad steel railway contact wire according to claim 1, characterized in that, The production equipment for horizontally continuous casting copper-clad steel railway contact wire further includes a polishing and grinding unit (11). The polishing and grinding unit (11) is located between the straightening unit (2) and the preheating furnace (3), and the polishing and grinding unit (11) is used for polishing and grinding the surface of the steel element (100).

7. The production equipment for a horizontally continuous-cast copper-clad steel railway catenary according to claim 1, characterized in that The horizontal continuous casting copper-clad steel railway catenary production equipment further includes a speed sensor, a controller, and an alarm (12). The speed sensor is located between the straightening unit (2) and the preheating furnace (3). The speed sensor is used to detect the traveling speed of the steel element (100). The speed sensor, the controller, and the alarm (12) are electrically connected in sequence.

8. The production equipment for the horizontally continuous cast copper-clad steel railway catenary according to claim 1, characterized in that, The horizontal continuous casting copper-clad steel railway catenary production equipment further includes an intermediate take-up machine (13) and a wire reel (14). The intermediate take-up machine (13) is arranged behind the cooling unit (6). The intermediate take-up machine (13) is used to take up the copper-clad steel after cooling and obtain copper-clad steel coils. The wire reel (14) is arranged in front of the rolling unit (7). The wire reel (14) is used to pay out the copper-clad steel coils.

9. A production process for a horizontally continuous cast copper-clad steel railway contact wire, characterized in that, The horizontal continuous casting copper-clad steel railway catenary production process is based on the horizontal continuous casting copper-clad steel railway catenary production equipment described in any one of claims 1-8. The horizontal continuous casting copper-clad steel railway catenary production process includes: Placing the coil on the pay-off machine (1). After paying out, the steel element (100) passes through the straightening unit (2) and the preheating furnace (3) in sequence and then enters the heating melting furnace (4). The molten copper in the melting cavity (41) coats the surface of the steel element (100) and crystallizes copper in the crystallization die (5) to form copper-clad steel. The crystallized copper-clad steel passes through the cooling unit (6), the rolling unit (7), the drawing unit (8), and the take-up machine (9) in sequence to obtain a copper-clad steel catenary.

10. A horizontally continuous casting copper-clad steel railway catenary product, characterized in that, The horizontal continuous casting copper-clad steel railway catenary product is prepared by using the horizontal continuous casting copper-clad steel railway catenary production equipment described in any one of claims 1-8.

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