Special-shaped copper bar drawing and cooling equipment

Abstract

The invention discloses special-shaped copper bar drawing and cooling equipment which comprises a workbench, a drawing die fixedly installed at the upper end of the workbench and an electric clamping device horizontally installed at the upper end of the workbench in a sliding mode. A drawing die is improved, a rough die cavity and a fine die cavity are formed in the drawing die and communicated through an oil immersion cavity, a cooling box is additionally arranged at the front end of the drawing die, and in the working process, a drawing blank is firstly cooled through cooling oil in the cooling cavity and sequentially passes through the rough die cavity and the fine die cavity to be subjected to rough drawing and fine drawing; the special-shaped copper bar is cooled again through the cooling oil in the oil immersion cavity between the two times of drawing, on one hand, the special-shaped copper bar is easily deformed and drawn step by step, the drawing quality is improved, on the other hand, the special-shaped copper bar is ensured to be fully immersed in the cooling oil to be cooled in the drawing process through the two times of immersion type oil immersion cooling, and the flowing cooling oil effectively takes away the heat of the copper bar outwards.

Description

Technical Field

[0001] The present invention relates to the technical field of production cooling, and more specifically, to a special-shaped copper bar drawing and cooling device. Background Art

[0002] Copper bars are a major variety of copper processing materials. Copper bars have a beautiful metallic luster and good forming and processing properties, etc. Therefore, various power transmission and transformation, electrical equipment, etc. made of them are widely used in the power field. Among them, special-shaped copper bars are copper bar structures with specific shapes obtained by drawing materials through a drawing machine, such as irregular shapes with cross-sections of L-shaped, T-shaped, trapezoidal, etc.

[0003] During the drawing process of special-shaped copper bars by a drawing die, cooling and shaping are required. The traditional cooling method is that cooling water is sprayed downward from the spray holes arranged in a straight line of a cooling pipe to cool the copper bar. Since the copper bar has a flat structure, especially for special-shaped copper bars, it is impossible to make the coolant evenly spray on each end face of the copper bar, resulting in different cooling degrees of each end face of the copper bar. In addition, direct contact with cooling water at high temperatures will also cause a certain degree of surface oxidation. After the drawing work is completed, cooling water remains on the end face of the copper bar, having certain cooling drawbacks. Summary of the Invention

[0004] The purpose of the present invention is to solve existing practical production problems. Compared with the prior art, a special-shaped copper bar drawing and cooling device is provided. By improving the existing simple drawing die, during operation, the drawn blank is first cooled by immersion in the cooling oil in the cooling cavity, and then passes through the rough die cavity and the fine die cavity for rough drawing and fine drawing in sequence. Between the two drawings, it is cooled again by immersion in the cooling oil in the oil immersion cavity. On the one hand, it is easy for the special-shaped copper bar to be gradually deformed and drawn, improving the drawing quality. On the other hand, through two immersion oil cooling processes, it is ensured that the copper bar is fully immersed in the cooling oil during the drawing process for cooling, and the flowing cooling oil effectively takes away the heat of the copper bar. A pair of oil wiping devices are provided to scrape off the excess oil stains during the process of the copper bar passing through. Compared with water cooling, oil cooling effectively prevents the copper bar from contacting with oxygen and reduces the possibility of oxidation.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A special-shaped copper bar drawing and cooling device, including a workbench, a drawing die fixedly installed at the upper end of the workbench, and an electric gripper horizontally slidably installed at the upper end of the workbench;

[0006] Inside the drawing die, a rough die cavity, an oil immersion cavity, and a fine die cavity are sequentially opened from left to right. A cooling box with a cooling cavity inside is installed at the outer end of the drawing die. The cooling cavity is connected and docked with the rough die cavity. Oil injection grooves one and two with outer openings are respectively opened at the top of the oil immersion cavity and the cooling cavity;

[0007] A pair of frames are installed at the upper end of the workbench, which are arranged close to one side of the fine die cavity and can move synchronously in both directions. An oiling device is installed on each of the pair of frames. The oiling device includes a frame slidably installed on the workbench. Transmission wheels are rotatably installed on the left and right sides inside the frame. A conveyor belt is installed between the pair of transmission wheels in a transmission manner. An oil suction sleeve that is fitted and matched with the end face of the special-shaped copper bar is fixedly sleeved on the outer end of the conveyor belt.

[0008] Furthermore, both the rough die cavity and the fine die cavity are set to be special-shaped forming structures that match the structure of the special-shaped copper bar, and the volume of the rough die cavity is larger than that of the fine die cavity. The oil immersion cavity extends and expands in the front-back and up-down directions relative to the rough die cavity. The drawing blank is inserted into the cooling box and penetrates through the drawing die. The drawing blank passes through the rough die cavity and the fine die cavity in sequence for rough drawing and fine drawing, which is suitable for the progressive deformation drawing of the special-shaped copper bar.

[0009] Furthermore, a component that matches the drawing blank is embedded and installed on the end wall of the cooling cavity away from the drawing die side, which is beneficial to play a relatively sealing role in the outer end of the cooling cavity.

[0010] Furthermore, hollow cavities that penetrate left and right are opened at the bottom ends of the cooling box and the drawing die. An oil receiving tank is embedded and installed in the hollow cavity. A return groove and a return hole that are connected to the oil receiving tank are respectively opened at the bottom ends of the cooling cavity and the oil immersion cavity. An oil injection tank for synchronously injecting oil into the first oil injection groove and the second oil injection groove is jointly installed at the upper ends of the cooling box and the drawing die.

[0011] Furthermore, one end of the oil receiving tank extends through to the outside and below the fine die cavity. An oil discharge groove opening that inclines inward and downward and is connected to the oil receiving tank is opened at the bottom side of the end of the fine die cavity. The oil discharge groove opening extends outward relative to the fine die cavity in the same way, which is beneficial to guiding the cooling oil attached to the drawn special-shaped copper bar downward. The oil receiving tank is connected and arranged together with the return groove, the return hole, and the oil discharge groove opening for collecting the cooling oil flowing from top to bottom, so that the cooling oil is in a flowing state. On the one hand, it ensures that the copper bar during the drawing process is immersed in the cooling oil, and on the other hand, the flowing cooling oil effectively takes away the heat of the copper bar.

[0012] Furthermore, the bottom end of the oil injection tank is respectively connected to the first oil injection groove and the second oil injection groove through a pair of oil injection pipes. A return pipe is externally connected to the end of the oil receiving tank, and a refrigerator is externally connected between the return pipe and the oil injection tank to realize the cooling and reuse of the recovered cooling oil.

[0013] Furthermore, the bottom ends of a pair of the frames are slidably mounted on the upper end of the workbench through a movable seat, and fixed seats located outside the movable seat are fixedly mounted on the front and rear sides of the upper end of the workbench. Two bidirectional screws are threadedly sleeved between the pair of movable seats, and the two ends of the bidirectional screws are respectively rotatably connected to the inner end walls of a pair of fixed seats, and a driving motor for synchronously driving the two bidirectional screws to rotate is fixedly mounted on one of the fixed seats.

[0014] Furthermore, the oil absorption sleeve includes an oil absorption sleeve 1 coated on the outer end wall of the conveyor belt and an oil absorption sleeve 2 coated on the outside of the oil absorption sleeve 1 and matching the structural surface of the special-shaped copper bar. A pair of oil absorption sleeves 1 arranged at the front and rear are respectively fitted with the two side surfaces of the special-shaped copper bar. The oil absorption sleeve 2 is divided into two oil absorption parts, which are fitted with the upper and lower end surfaces of the special-shaped copper bar and the special-shaped surface of the special-shaped copper bar. A pair of oiling devices arranged at the front and rear can evenly smear and remove excess oil stains on the special-shaped copper bar during the passage of the special-shaped copper bar. A layer of oil film is attached to the special-shaped copper bar. Compared with water cooling, oil cooling can effectively prevent the copper bar from contacting with oxygen in the air, reducing the possibility of oxidation and rust.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) This scheme is to improve the existing simple drawing die. A coarse die cavity and a fine die cavity are arranged in a horizontal connection in the drawing die. The two are connected by an oil immersion cavity. A cooling box with a cooling cavity is added at the end of the coarse die cavity of the drawing die. During operation, the drawing blank is inserted into the cooling box and passes through the drawing die. It is first immersed in the cooling oil in the cooling cavity for cooling, and then passes through the coarse die cavity and the fine die cavity for rough drawing and fine drawing in turn. Between the two drawing steps, it is immersed in the cooling oil in the oil immersion cavity again for cooling. On the one hand, it is easy to gradually deform and draw the special-shaped copper busbar, thereby improving the drawing quality. On the other hand, the two immersion oil immersion cooling ensures that the copper busbar is immersed in the cooling oil during the drawing process, so that the end faces of the copper busbar are fully cooled. The flowing cooling oil effectively carries the heat of the copper busbar outward, thereby improving the cooling effect.

[0017] (2) The present scheme also adds a pair of oiling devices at one side of the fine mold cavity adjacent to the drawing die. The oiling device includes a frame slidably mounted on a workbench, and transmission wheels are rotatably mounted on the left and right sides of the frame. A conveyor belt is installed between the pair of transmission wheels. An oil absorbing sleeve that fits in with the end face of the special-shaped copper bar is fixedly sleeved on the outer end of the conveyor belt. The pair of oiling devices arranged in front and back can evenly smear and remove excess oil stains on the special-shaped copper bar during the process of the special-shaped copper bar passing through. A layer of oil film is attached to the special-shaped copper bar. Compared with water cooling, oil cooling can effectively prevent the copper bar from contacting with oxygen in the air, thereby reducing the possibility of oxidation and rusting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the present invention when using an electric gripper to fix a drawn blank that has passed through a drawing die;

[0019] Figure 2 This is a schematic structural diagram of the present invention during the drawing process;

[0020] Figure 3 This is a schematic structural diagram of another perspective of the present invention during the drawing process;

[0021] Figure 4 This is a schematic structural diagram of the joint between the drawing die and the cooling box of the present invention;

[0022] Figure 5 This is a schematic structural diagram of another perspective of the joint between the drawing die and the cooling box of the present invention;

[0023] Figure 6 This is a schematic structural diagram of the present invention when the drawing die is detached from the cooling box and the oil injection tank;

[0024] Figure 7 This is a side sectional view of the cooling box of the present invention;

[0025] Figure 8 This is a top sectional view of the drawing die of the present invention;

[0026] Figure 9 This is another perspective top sectional view of the drawing die of the present invention;

[0027] Figure 10 This is the top section of the drawing die of the present invention;

[0028] Figure 11 This is a partial sectional view of the joint between the drawing die and the cooling box of the present invention;

[0029] Figure 12 This is a schematic structural diagram of the present invention when a profiled copper bar drawn out passes through an oiling device;

[0030] Figure 13 This is a schematic structural diagram of the present invention when a pair of oiling devices move away from each other;

[0031] Figure 14 This is an exploded view of the oiling device of the present invention.

[0032] Description of reference numerals in the figure:

[0033] 1. Workbench; 2. Drawing die; 201. Rough die cavity; 202. Fine die cavity; 203. Oil immersion cavity; 204. Oil drain slot; 205. Return hole; 3. Electric gripper; 4. Cooling box; 401. Cooling cavity; 402. Return groove; 5. Oil injection tank; 6. Oil receiving tank; 7. Refrigerator; 8. Frame; 9. Conveyor wheel; 10. Conveyor belt; 11. Oil suction sleeve one; 12. Oil suction sleeve two; 13. Bi-directional screw. Detailed implementation mode

[0034] The following will combine the accompanying drawings in the embodiments of the present invention; clearly and completely describe the technical solutions in the embodiments of the present invention; obviously; the described embodiments are only part of the embodiments of the present invention; rather than all embodiments. Based on the embodiments of the present invention; all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0035] Embodiment 1: The present invention discloses a special-shaped copper bar drawing and cooling device. Please refer to Figures 1 - 3 ; it includes a workbench 1 and a drawing die 2 fixedly installed at its upper end. An electric gripper 3 that moves horizontally and corresponds to the position of the drawing die 2 is also installed at the upper end of the workbench 1 through a pair of electric guide rails.

[0036] Please refer to Figures 8 - 10 ; on the left and right sides inside the drawing die 2, a rough die cavity 201 and a fine die cavity 202 are respectively opened. An oil immersion cavity 203 that is connected to the rough die cavity 201 and the fine die cavity 202 and has an oil injection groove one at the upper end is opened in the middle of the drawing die 2;

[0037] Both the rough die cavity 201 and the fine die cavity 202 are set to special-shaped forming structures that match the structure of the special-shaped copper bar, and the volume of the rough die cavity 201 is larger than that of the fine die cavity 202. The oil immersion cavity 203 extends and expands in the front-back and up-down directions relative to the rough die cavity 201. Insert the drawing blank into the cooling box 4 and pass it through the drawing die 2. The drawing blank passes through the rough die cavity 201 and the fine die cavity 202 in sequence for rough drawing and fine drawing, which is suitable for the step-by-step deformation drawing of special-shaped copper bars and improves the drawing quality.

[0038] Please refer to Figures 3 - 7 ; one end of the drawing die 2 away from the electric gripper 3 is externally connected to a cooling box 4. A cooling cavity 401 for the drawing blank to penetrate and having an oil injection groove two at the upper end is opened inside the cooling box 4. The cooling cavity 401 is connected and docked with the rough die cavity 201. A [403 that matches the drawing blank] is embedded and installed on the end wall of the cooling cavity 401 away from the drawing die 2, which is beneficial to play a relatively sealing role for the outer end of the cooling cavity 401.

[0039] The cooling box 4 and the bottom end of the drawing die 2 are provided with a hollow cavity penetrating from left to right. An oil receiving tank 6 is embedded in the hollow cavity. The bottom ends of the cooling cavity 401 and the oil immersion cavity 203 are respectively provided with a return groove 402 and a return hole 205 communicating with the oil receiving tank 6. The cooling box 4 and the upper end of the drawing die 2 are jointly installed with an oil injection tank 5 for synchronously injecting oil into the first oil injection groove and the second oil injection groove.

[0040] Please refer to Figure 5 , Figure 8 and Figure 11 , one end of the oil receiving tank 6 penetrates and extends to the lower outer side of the fine die cavity 202. The bottom side of the end of the fine die cavity 202 is provided with an oil drainage notch 204 that inclines inward and downward and communicates with the oil receiving tank 6. The oil drainage notch 204 expands outward relative to the fine die cavity 202, which is beneficial to guiding the cooling oil attached to the drawn special-shaped copper bar downward. The oil receiving tank 6 is jointly connected and arranged with the return groove 402, the return hole 205, and the oil drainage notch 204 for collecting the cooling oil flowing from top to bottom, so that the cooling oil is in a flowing state.

[0041] During operation, the drawing blank is extended into the cooling box 4 and penetrates the drawing die 2. The drawing blank is first cooled by the immersion cooling of the cooling oil in the cooling cavity of the cooling box 4, and then passes through the rough die cavity 201 and the fine die cavity 202 for rough drawing and fine drawing in sequence. It is cooled again by the immersion cooling of the cooling oil in the oil immersion cavity 203 between the two drawings.

[0042] On the one hand, it is easy for the gradual deformation drawing of the special-shaped copper bar, improving the drawing quality. On the other hand, through two immersion oil immersion coolings, it is ensured that the copper bar during the drawing process is immersed in the cooling oil, so that the end faces of the special-shaped copper bar are fully cooled. The flowing cooling oil effectively takes away the heat of the copper bar. In addition, during the drawing process of the special-shaped copper bar, part of the cooling oil is driven into the rough die cavity 201 and the fine die cavity 202, which not only reduces the friction between the copper bar and the die cavity, but also plays a certain role in cooling the die cavity.

[0043] Please refer to Figure 3 , Figure 6 , the bottom end of the oil injection tank 5 is respectively communicated with the first oil injection groove and the second oil injection groove through a pair of oil injection pipes. The end of the oil receiving tank 6 is externally connected with a return pipe, and a refrigerator 7 is externally connected between the return pipe and the oil injection tank 5 to realize the cooling and reuse of the recovered cooling oil.

[0044] Embodiment 2: On the basis of Embodiment 1, an oil wiping device is added to the end of the drawing die 2 far from the cooling box 4 for scraping the excess cooling oil on the drawn special-shaped copper bar, specifically as follows:

[0045] Please refer to Figures 1 - 3, a pair of frames 8 are installed at the upper end of the workbench 1, which are arranged close to one side of the fine die cavity 202 and can move synchronously in both directions. An oiling device is installed on each of the pair of frames 8. The bottom ends of the pair of frames 8 are slidably installed on the upper end of the workbench 1 through moving seats. Fixed seats located outside the moving seats are also fixedly installed on the front and rear sides of the upper end of the workbench 1. Two bidirectional screws 13 are threadedly sleeved between the pair of moving seats. The two ends of the bidirectional screw 13 are respectively rotationally connected to the inner end walls of the pair of fixed seats. A driving motor for synchronously driving and rotating the two bidirectional screws 13 is fixedly installed on one of the fixed seats.

[0046] Please refer to Figure 13 , Figure 14 , the oiling device includes a frame 8 slidably installed on the workbench 1. Transmission wheels 9 are rotatably installed on the left and right sides inside the frame 8. A conveyor belt 10 is installed between the pair of transmission wheels 9 in a transmission manner. An oil absorption sleeve that fits and matches the end face of the special-shaped copper bar is fixedly sleeved on the outer end of the conveyor belt 10;

[0047] More specifically, the oil absorption sleeve includes an oil absorption sleeve one 11 coated on the outer end wall of the conveyor belt 10 and an oil absorption sleeve two 12 coated on the outside of the oil absorption sleeve one 11 and matching the structural surface of the special-shaped copper bar. Both the oil absorption sleeve one 11 and the oil absorption sleeve two 12 are made of oil absorption materials. The pair of front and rear oil absorption sleeves one 11 are respectively attached to the two side surfaces of the special-shaped copper bar. The oil absorption sleeve two 12 is divided into two oil absorption parts that are attached to the upper and lower end faces of the special-shaped copper bar and the special-shaped surface of the special-shaped copper bar. The oil absorption sleeve needs to be replaced regularly and inclined;

[0048] During the process of the special-shaped copper bar passing through, the pair of front and rear oiling devices realize uniform smearing and removal of the excess oil stains on the special-shaped copper bar. An oil film adheres to the special-shaped copper bar. Compared with water cooling, oil cooling can effectively prevent the copper bar from contacting with oxygen in the air and reduce the possibility of oxidation and rust.

[0049] In summary: This solution improves the existing simple drawing die and adds a matching cooling box 4 and an oiling device. During operation, please refer to Figures 1 - 3 , insert the drawing blank into the cooling box 4 and pass through the drawing die 2. Use the electric gripper 3 to mechanically grip the end of the drawing blank. Rely on the oil injection tank 5 to inject cooling oil into the cooling box 4 and the drawing die 2. The electric gripper 3 pulls the drawing blank forward;

[0050] At this time, a pair of oiling devices approach and fit onto the drawn special-shaped copper bar. In this process, the end of the drawn blank is initially positioned to be relatively slender to facilitate passing through the drawing die 2. The section of the drawn blank that has not been affected by the drawing die 2 initially is waste. During the subsequent continuous drawing process, the drawn special-shaped copper bar is cut by a cutting machine. This cutting can be set outside the oiling device. Thus, for subsequent multiple drawing operations except for the first drawing, the electric gripper 3 clamps and positions the cut end of the special-shaped copper bar exposed outside the oiling device.

[0051] Please refer to Figures 6 - 11 , the drawn blank is first cooled by immersion in the cooling oil in the cooling chamber 401 and then passes through the rough die cavity 201 and the fine die cavity 202 for rough drawing and finish drawing in sequence. It is cooled by immersion in the cooling oil in the oil immersion chamber 203 again between the two drawing operations. On the one hand, it is easy for the special-shaped copper bar to be gradually deformed and drawn, improving the drawing quality. On the other hand, through two immersion oil cooling operations, it is ensured that the copper bar during the drawing process is immersed in the cooling oil and fully cooled on each end face. The flowing cooling oil effectively takes away the heat of the copper bar.

[0052] Please refer to Figure 12 , the special-shaped copper bar after two drawing operations passes through the oiling devices arranged on the left and right. The oiling devices in contact with the end face of the special-shaped copper bar are used to evenly apply and remove the excess oil stains on the special-shaped copper bar. An oil film adheres to the special-shaped copper bar. Compared with water cooling, oil cooling can effectively prevent the copper bar from contacting oxygen in the air and reduce the possibility of oxidation and rusting.

[0053] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto; any person skilled in the art within the technical scope disclosed by the present invention; according to the technical solution of the present invention and its improved conceptions, making equivalent substitutions or changes; should be covered by the protection scope of the present invention.

Claims

1. A special-shaped copper bar drawing and cooling device, comprising a workbench (1), a drawing die (2) fixedly installed at the upper end of the workbench (1), and an electric gripper (3) horizontally slidably installed at the upper end of the workbench (1), characterized in that: Inside the drawing die (2), a rough die cavity (201), an oil immersion cavity (203), and a fine die cavity (202) are successively arranged from left to right. A cooling box (4) with a cooling cavity (401) inside is installed at the outer end of the drawing die (2). The cooling cavity (401) is connected and docked with the rough die cavity (201). Oil injection grooves one and two with outer ends open are respectively arranged at the tops of the oil immersion cavity (203) and the cooling cavity (401); A pair of frames (8) are installed at the upper end of the workbench (1) on one side adjacent to the fine die cavity (202) and can move synchronously in both directions. An oiling device is installed on each of the pair of frames (8). The oiling device includes a frame (8) slidably installed on the workbench (1). Transmission wheels (9) are rotatably installed on the left and right sides inside the frame (8). A conveyor belt (10) is installed between the pair of transmission wheels (9) in a transmission manner. An oil absorption sleeve that fits and matches the end face of the special-shaped copper bar is fixedly sleeved on the outer end of the conveyor belt (10).

2. The special-shaped copper bar drawing and cooling equipment according to claim 1, characterized in that: Both the rough die cavity (201) and the fine die cavity (202) are set to special-shaped forming structures that match the structure of the special-shaped copper bar, and the volume of the rough die cavity (201) is larger than the volume of the fine die cavity (202).

3. The special-shaped copper bar drawing and cooling equipment according to claim 1, characterized in that: A sealing ring (403) that matches the drawn blank is embedded and installed on the end wall of the cooling cavity (401) on the side away from the drawing die (2), which is beneficial to playing a relative sealing role on the outer end of the cooling cavity (401).

4. The special-shaped copper bar drawing and cooling equipment according to claim 1, characterized in that: Hollow cavities that penetrate left and right are provided at the bottom ends of the cooling box (4) and the drawing die (2). An oil receiving tank (6) is embedded and installed in the hollow cavity. Return grooves (402) and return holes (205) that are connected to the oil receiving tank (6) are respectively arranged at the bottoms of the cooling cavity (401) and the oil immersion cavity (203). An oil injection tank (5) for simultaneously injecting oil into the oil injection groove one and the oil injection groove two is jointly installed at the upper ends of the cooling box (4) and the drawing die (2).

5. An abnormal-shaped copper bar drawing and cooling device according to claim 4, characterized in that: One side end of the oil receiving tank (6) extends through to the outside and below the fine die cavity (202). An oil discharge groove opening (204) that inclines inward and downward and is connected to the oil receiving tank (6) is arranged at the bottom side of the end of the fine die cavity (202).

6. The special-shaped copper bar drawing and cooling equipment according to claim 5, characterized in that: The bottom end of the oil injection tank (5) is respectively connected to the oil injection groove one and the oil injection groove two through a pair of oil injection pipes. A return pipe is externally connected to the end of the oil receiving tank (6), and a refrigerator (7) is externally connected between the return pipe and the oil injection tank (5).

7. An abnormal-shaped copper bar drawing and cooling device according to claim 1, characterized in that: The bottom ends of the pair of frames (8) are slidably installed at the upper end of the workbench (1) through moving seats. Fixed seats are also fixedly installed on the front and rear sides of the upper end of the workbench (1) outside the moving seats. Two bidirectional screws (13) are threadedly sleeved between the pair of moving seats. The two ends of the bidirectional screw (13) are respectively rotationally connected to the inner end walls of the pair of fixed seats. A driving motor for synchronously driving and rotating the two bidirectional screws (13) is fixedly installed on one of the fixed seats.

8. The special-shaped copper bar drawing and cooling equipment according to claim 1, wherein: The oil suction sleeve includes an oil suction sleeve one (11) wrapped around the outer end wall of the conveyor belt (10) and an oil suction sleeve two (12) wrapped around the outside of the oil suction sleeve one (11) and matching the structure surface of the special-shaped copper bar.

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