A cable drum

Abstract

The application discloses a cable drum and belongs to the field of cable winding equipment. The cable drum comprises a support frame, a drum body installed on the support frame and used for winding a cable, a top plate installed on the support frame and located above the drum body, a blowing mechanism installed on the top plate and used for blowing hot air to the outer surface of the drum body, an air outlet hole arranged on the outer surface of the drum body, a cavity arranged in the drum wall of the drum body, an air inlet pipe used for conveying hot air to the cavity, a sealing block located in the air outlet hole and used for blocking the communication between the cavity and the outside world, and a triggering mechanism used for opening the sealing block when the drum body winds the cable, so that the communication between the cavity and the outside world is maintained. The ice and snow condensed on the cable can be quickly melted, the cable temperature is maintained, and the damage of the cable caused by the rain and snow weather is reduced.

Description

Technical Field

[0001] This invention relates to the field of cable winding equipment, and more specifically, to a cable reel. Background Technology

[0002] Cable reels are cable winding devices that provide power, control power, or control signals to large mobile equipment. They are widely used in heavy machinery such as port gantry cranes, container cranes, ship loaders, and tower cranes. The main types of cable reels include: counterweight type, torque motor type, hysteresis type, and frequency converter drive type.

[0003] Cable reels are generally used and placed outdoors. Therefore, when cables are wound on the cable reels, they are prone to freezing and frost in cold winters. This is especially true for cable reels used in port gantry cranes and ship loaders, where the cables are more susceptible to erosion from rain and snow, causing them to freeze together and become impossible to pull. Forcing them to run dry can also damage the cables.

[0004] In view of this, the present invention provides a novel cable reel. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a cable reel that can quickly melt the frost and snow condensed on the cable, maintain the cable at a suitable temperature, and reduce the damage to the cable caused by rain and snow.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A cable reel includes a support frame and a cylinder mounted on the support frame for winding a cable, and further includes:

[0008] A top plate, which is located above the cylinder and mounted on the support frame;

[0009] An air blowing mechanism, which is mounted on the top plate and is used to blow hot air onto the outer surface of the cylinder;

[0010] An air outlet is provided on the outer surface of the cylinder body, and a cavity is provided inside the cylinder wall, which communicates with the outside through the air outlet.

[0011] An air intake pipe, the air intake pipe being used to deliver hot air into the cavity;

[0012] A sealing block, located inside the air outlet and used to block the cavity from communicating with the outside;

[0013] A triggering mechanism is provided to open the sealing block when the cable is wound around the cylinder, so as to maintain the connection between the cavity and the outside.

[0014] A further preferred embodiment is that the triggering mechanism comprises:

[0015] A trigger block, located outside the air outlet opening and used to contact the cable;

[0016] The first sleeve has one end fixed to the trigger block and the other end extended into the air outlet.

[0017] A central column is located inside the first sleeve. A vertical rod is fixed to one end of the central column away from the trigger block. One end of the vertical rod is fixed to the central column, and a fixing plate is fixed to the other end. The fixing plate is located inside the air outlet and is fixed to the inner wall of the air outlet.

[0018] The second sleeve is fitted onto the outer surface of the vertical rod;

[0019] A spring, which is wound around the outer surface of the vertical rod and fixed between the second sleeve and the fixing plate;

[0020] A ball is located between the first sleeve, the second sleeve, and the central column. The ball is used to drive the second sleeve to move closer to the fixed plate when the trigger block is squeezed by the cable, and to drive the trigger block to reset when the trigger block is released from the squeeze. The sealing block is used to move with the first sleeve or the second sleeve to open or close the air outlet.

[0021] A further preferred embodiment is that the inner wall of the air outlet is provided with a groove, the groove including a first groove and a second groove, both of which are circular and their centers are located on the central axis of the air outlet;

[0022] The sealing block includes a first sealing block and a second sealing block. The first sealing block is annular and its inner side is fixed to the first sleeve, while its outer side extends into the first groove. The second sealing block is annular and its inner side is fixed to the second sleeve, while its outer side extends into the second groove.

[0023] When the trigger block is not compressed by the cable, the first sealing block is in close contact with the first groove on the side near the trigger block, and the second sealing block is in close contact with the second groove on the side near the trigger block.

[0024] A further preferred embodiment is that the outer surface of the cylinder is evenly distributed with a plurality of air outlet holes, at least one of which is a main air outlet hole and the rest are secondary air outlet holes;

[0025] The cylinder wall is provided with a first connecting channel and a second connecting channel. The first connecting channel is used to connect the adjacent main air outlet and the secondary air outlet. One end of the first connecting channel is connected to the bottom of the first groove of the main air outlet, and the other end is connected to the inner wall of the secondary air outlet. The connection between the first connecting channel and the secondary air outlet is located between the first groove and the opening of the secondary air outlet.

[0026] The second connecting channel is used to connect adjacent air outlets. The two ends of the second connecting channel are respectively connected to the inner walls of adjacent air outlets. The connection point between the second connecting channel and the air outlet is located between the first groove and the opening of the air outlet.

[0027] A further preferred embodiment is that both the first sealing block and the second sealing block are rubber blocks;

[0028] A further preferred embodiment is that the inner diameter of the first sleeve gradually increases from the inside to the outside at the end away from the trigger block, thereby forming a conical cavity for accommodating the ball;

[0029] The central column near the second sleeve and the second sleeve near the central column are both provided with a beveled surface for abutting against the ball.

[0030] When the trigger block is not squeezed by the cable, the ball is pressed against the inner wall of the conical cavity of the first sleeve and the inclined surface of the central column and the second sleeve.

[0031] A further preferred embodiment is that multiple beads are provided.

[0032] A further preferred embodiment is that when the trigger block is not subjected to cable compression, the distance between the trigger block and the central post is less than the thickness of the trigger block.

[0033] A further preferred embodiment is that the top plate is an arc-shaped plate with its center located on the central axis of the cylinder.

[0034] A further preferred embodiment is that the air blowing mechanism includes a first air supply pipe, a second air supply pipe, and an air outlet pipe;

[0035] The first gas supply pipe is an arc-shaped pipe and its arc angle and arc direction are consistent with those of the top plate. The first gas supply pipe is fixed to the inner arc surface of the top plate.

[0036] Multiple first gas supply pipes are provided, and the second gas supply pipe is used to connect multiple first gas supply pipes. One end of the gas outlet pipe is connected to the second gas supply pipe, and the other end faces the outer surface of the cylinder.

[0037] In summary, the present invention has the following beneficial effects: To prevent the cable from being corroded by rainwater, a top plate is installed above the cylinder. The top plate mainly serves to block rain, thus improving the service life of the cable. During rainy or snowy weather, the cable is prone to freezing together. Long-term freezing not only affects the cable's service life and damages its performance, but also makes it impossible to perform winding, unwinding, and other operations. Therefore, the present invention is equipped with an air blowing mechanism on the top plate. When the external hot air conveying device delivers hot air to the first air supply pipe, the hot air will be blown through the air outlet pipe onto the cable wound on the cylinder, thereby achieving a heating effect.

[0038] When the cable is wound around the cylinder, the trigger block is compressed, causing the first sleeve to move into the air outlet. At this time, the ball is compressed by the inner wall of the first sleeve, causing the second sleeve to also move into the air outlet. As the first and second sleeves move, the first and second sealing blocks also move synchronously, stopping the contact between the first sealing block and the side of the first groove, and stopping the contact between the second sealing block and the side of the second groove. At this point, the air outlet is opened. After the air outlet is opened, hot air enters through the air inlet pipe, filling the cavity and blowing it onto the cable wound around the cylinder. This quickly melts frost and snow condensed on the cable, maintaining a suitable cable temperature and reducing damage from rain and snow. After the cable is released, the first and second sleeves and the trigger block automatically reset under the action of the spring and the ball, sealing the air outlet through the first and second sealing blocks, thus blocking the cavity from the outside. Attached Figure Description

[0039] Figure 1 This is a structural diagram of an embodiment, mainly used to illustrate the overall structure of the cable reel;

[0040] Figure 2 This is a structural diagram of an embodiment, mainly used to illustrate the overall structure of the cable reel;

[0041] Figure 3 This is a structural diagram of an embodiment, mainly used to illustrate the structure of the air blowing mechanism;

[0042] Figure 4 This is a partial cross-sectional schematic diagram of the embodiment, mainly used to illustrate the connection structure between adjacent air outlets;

[0043] Figure 5 yes Figure 4 The enlarged view of structure A in the middle is mainly used to show the interior of the air vent;

[0044] Figure 6 This is a partial cross-sectional schematic diagram of an embodiment, mainly used to illustrate the structure when the air vent is sealed;

[0045] Figure 7This is a partial cross-sectional schematic diagram of an embodiment, mainly used to illustrate the structure when the air vent is open.

[0046] In the diagram, 1 is the support frame; 101 is the base; 102 is the support plate; 2 is the rotating shaft; 3 is the support rod; 4 is the air inlet pipe; 5 is the top plate; 6 is the cylinder; 7 is the air outlet; 8 is the air blowing mechanism; 81 is the first air supply pipe; 82 is the second air supply pipe; 83 is the air outlet pipe; 9 is the triggering mechanism; 91 is the trigger block; 92 is the first sleeve; 93 is the central column; 94 is the vertical rod; 95 is the second sleeve; 96 is the ball; 97 is the spring; 98 is the fixing plate; 10 is the limiting frame; 11 is the cavity; 12 is the first connecting channel; 131 is the first groove; 132 is the second groove; 141 is the first sealing block; 142 is the second sealing block; and 15 is the second connecting channel. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Example: A cable reel, such as Figure 1-7 As shown, the system includes a support frame 1, a cylindrical body 6, a top plate 5, an air blowing mechanism 8, an air outlet 7, an air inlet pipe 4, a sealing block, and a triggering mechanism 9. The cylindrical body 6 is mounted on the support frame 1 for winding cables. The support frame 1 includes a base 101 and a support plate 102. The base 101 is located below the cylindrical body 6 and has mounting holes. The support plate 102 is located on one side of the end of the cylindrical body 6, with its lower end fixed to the base 101 and its upper end fixed to a support rod 3. A rotating shaft 2 is fixed to one end of the cylindrical body 6, passing through the support plate 102. Limiting frames 10 are provided at both ends of the cylindrical body 6, fixed to the circumferential surface of the cylindrical body 6 to prevent cables from slipping out from both ends of the cylindrical body 6.

[0049] Reference Figure 1-3The top plate 5 is located above the cylinder 6 and mounted on the support frame 1. Specifically, the upper end of the support plate 102 is fixed to the top plate 5, and the lower end is fixed to the support plate 102. The top plate 5 is an arc-shaped plate with its center located on the central axis of the cylinder 6. The air blowing mechanism 8 is mounted on the top plate 5 and is used to blow hot air onto the outer surface of the cylinder 6 to accelerate the melting of frost and snow on the cable surface and to heat the cable to prevent the cable from being affected by prolonged exposure to cold environments. Preferably, the air blowing mechanism 8 includes a first air supply pipe 81, a second air supply pipe 82, and an air outlet pipe 83. The first air supply pipe 81 is an arc-shaped pipe with the same arc and arc direction as the top plate 5, and the first air supply pipe 81 is fixed to the inner arc surface of the top plate 5. Multiple first air supply pipes 81 are evenly spaced along the axial direction of the cylinder 6. The second air supply pipe 82 is used to connect multiple first air supply pipes 81, and the first air supply pipes 81 are connected to an external hot air delivery device. Multiple second gas supply pipes 82 are evenly spaced along the length of the first gas supply pipe 81. One end of each gas outlet pipe 83 is connected to the second gas supply pipe 82, and the other end faces the outer surface of the cylinder 6. Multiple gas outlet pipes 83 are evenly distributed on each second gas supply pipe 82.

[0050] In the above technical solution, to prevent the cable from being corroded by rainwater, the present invention installs a top plate 5 above the cylinder 6. The top plate 5 mainly serves to block rain, thereby improving the service life of the cable. During rainy or snowy weather, the cable is prone to freezing together. Long-term freezing not only affects the cable's service life and damages its performance but also makes winding and unwinding operations impossible. Therefore, the present invention provides an air blowing mechanism 8 on the top plate 5. When an external hot air conveying device delivers hot air to the first air supply pipe 81, the hot air is blown through the air outlet pipe 83 onto the cable wound around the cylinder 6, thus providing a heating effect. Excessive heat can easily damage the cable; therefore, the temperature of the hot air generally does not exceed 40°C.

[0051] Reference Figure 1-7The air outlet 7 is a circular hole located on the outer surface of the cylinder 6. A cavity 11 is formed inside the cylinder wall of the cylinder 6, communicating with the outside through the air outlet 7. A sealing block is located inside the air outlet 7 and is used to block the communication between the cavity 11 and the outside. A triggering mechanism 9 is used to open the sealing block when the cylinder 6 is wound with a cable, thus maintaining communication between the cavity 11 and the outside. The triggering mechanism 9 includes a trigger block 91, a first sleeve 92, a central column 93, a second sleeve 95, a spring 97, and a ball 96. The trigger block 91 is located outside the opening of the air outlet 7 and is used to contact the cable. One end of the first sleeve 92 is fixed to the trigger block 91, and the other end extends into the air outlet 7. The central column 93 is located inside the first sleeve 92. A vertical rod 94 is fixed to one end of the central column 93 away from the trigger block 91. One end of the vertical rod 94 is fixed to the central column 93, and the other end is fixed to a fixing plate 98. The fixing plate 98 is located inside the air outlet 7 and fixed to the inner wall of the air outlet 7. Preferably, the inner diameter of the first sleeve 92 is the same as the outer diameter of the central column 93, the outer diameter of the first sleeve 92 is smaller than the diameter of the air outlet 7, and the top view projection of the trigger block 91 is circular and its diameter is smaller than the diameter of the air outlet 7. The vertical rod 94, the central column 93, and the central axis of the air outlet 7 are all on the same straight line.

[0052] The second sleeve 95 is fitted onto the outer surface of the vertical rod 94. The spring 97 is wound around the outer surface of the vertical rod 94 and fixed between the second sleeve 95 and the fixing plate 98. The outer diameter of the second sleeve 95 is the same as the diameter of the central column 93. A ball 96 is located between the first sleeve 92, the second sleeve 95, and the central column 93. The ball 96 is used to drive the second sleeve 95 to move closer to the fixing plate 98 when the trigger block 91 is squeezed by the cable, and to drive the trigger block 91 to reset when the squeeze is released. The sealing block is used to move with the first sleeve 92 or the second sleeve 95 to open or close the air outlet 7. Preferably, the inner wall of the air outlet 7 is provided with a groove, including a first groove 131 and a second groove 132. Both the first groove 131 and the second groove 132 are circular and their centers are located on the central axis of the air outlet 7. The sealing block includes a first sealing block 141 and a second sealing block 142. The first sealing block 141 is annular and its inner side is fixed to the outer surface of the first sleeve 92, while its outer side extends into the first groove 131. The second sealing block 142 is annular and its inner side is fixed to the outer surface of the second sleeve 95, while its outer side extends into the second groove 132. When the trigger block 91 is not compressed by the cable, the first sealing block 141 is tightly attached to the side of the first groove 131 near the trigger block 91, and the second sealing block 142 is tightly attached to the side of the second groove 132 near the trigger block 91. This double sealing of the air outlet 7 through the first sealing block 141 and the second sealing block 142 improves the sealing performance of the air outlet 7 and prevents solid impurities, rainwater, etc. from entering the cavity 11. The air inlet pipe 4 is used to supply hot air to the cavity 11. One end of the air inlet pipe 4 is connected to the cavity 11, and the other end passes through the cylinder 6 and is connected to an external hot air supply device. Preferably, the temperature of the hot air supplied by the air inlet pipe 4 generally does not exceed 35°C.

[0053] Preferably, the outer surface of the cylinder 6 is evenly distributed with multiple air outlets 7, at least one of which is a main air outlet 7, and the rest are secondary air outlets 7. A first connecting channel 12 and a second connecting channel 15 are provided inside the cylinder wall of the cylinder 6. The first connecting channel 12 connects adjacent main air outlets 7 and secondary air outlets 7. One end of the first connecting channel 12 is connected to the bottom of the first groove 131 of the main air outlet 7, and the other end is connected to the inner wall of the secondary air outlet 7. The connection point between the first connecting channel 12 and the secondary air outlet 7 is located between the first groove 131 and the opening of the secondary air outlet 7. The second connecting channel 15 connects adjacent secondary air outlets 7. Both ends of the second connecting channel 15 are respectively connected to the inner wall of adjacent secondary air outlets 7. The connection point between the second connecting channel 15 and the secondary air outlet 7 is located between the first groove 131 and the opening of the secondary air outlet 7.

[0054] In the above technical solution, when the cable is wound up, not every air outlet 7 is necessarily squeezed by the cable. The air outlet 7 that is not squeezed by the cable is located in the gap between adjacent cables. The air blowing effect is better and the airflow is easier to pass through the air outlet 7 in the gap between adjacent cables. For this reason, the present invention provides a first connecting channel 12 and a second connecting channel 15 to connect the main air outlet 7 (generally, one main air outlet 7 is sufficient to meet the requirements) and each of the secondary air outlets 7, so that the trigger blocks 91 that are not squeezed by the cable can also blow air through the air outlet 7. Therefore, as long as the trigger blocks 91 on the main air outlet 7 are squeezed by the cable, hot air can be blown out through the main air outlet 7 and each of the secondary air outlets 7.

[0055] Preferably, both the first sealing block 141 and the second sealing block 142 are rubber blocks, thereby improving the sealing performance of the air outlet 7.

[0056] Preferably, the inner diameter of the first sleeve 92 gradually increases from the inside to the outside at the end away from the trigger block 91, thus forming a conical cavity for accommodating the ball 96. Both the end of the central post 93 near the second sleeve 95 and the end of the second sleeve 95 near the central post 93 are provided with a ring of inclined surfaces for abutting against the ball 96. Specifically, the inclined surfaces on the central post 93 and the second sleeve 95 are inclined in opposite directions. When the trigger block 91 is not compressed by the cable, the ball 96 abuts against the inner wall of the conical cavity of the first sleeve 92 and the inclined surfaces on the central post 93 and the second sleeve 95, respectively. Multiple balls 96 are provided, distributed around the vertical rod 94.

[0057] To prevent the ball 96 from leaking out from under the first sleeve 92 and to allow hot air to pass smoothly through the air outlet 7, preferably, when the trigger block 91 is not compressed by the cable, the distance between the trigger block 91 and the central post 93 is less than the thickness of the trigger block 91. In this way, when the air outlet 7 is opened, the outer surface of the trigger block 91 is still outside the outer surface of the cylinder 6, which facilitates gas discharge.

[0058] In this invention, when the cable is wound around the cylinder 6, the trigger block 91 is squeezed, causing the first sleeve 92 to move into the air outlet 7. At this time, the ball 96 is squeezed by the inner wall of the first sleeve 92, causing the second sleeve 95 to also move into the air outlet 7. When the first sleeve 92 and the second sleeve 95 move, the first sealing block 141 and the second sealing block 142 will also move synchronously, thereby stopping the contact between the first sealing block 141 and the side of the first groove 131, and the contact between the second sealing block 142 and the side of the second groove 132. At this time, the air outlet 7 is opened. After the air outlet 7 is opened, hot air is introduced through the air inlet pipe 4, so that the hot air fills the cavity 11 and is blown onto the cable wound around the cylinder 6 through the air outlet. After the cable is discharged, the first sleeve 92, the second sleeve 95 and the trigger block 91 will automatically reset under the action of the spring 97 and the ball 96, so that the air outlet 7 is sealed by the first sealing block 141 and the second sealing block 142, thereby blocking the connection between the cavity 11 and the outside.

[0059] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cable drum comprising a support frame (1) and a drum (6) mounted on the support frame (1) for winding a cable, characterized in that: Also include: The top plate (5) is located above the cylinder (6) and is installed on the support frame (1); Blowing mechanism (8), the blowing mechanism (8) is installed on the top plate (5) and is used for blowing hot air to the outer surface of the cylinder (6); The air outlet hole (7) is provided on the outer surface of the cylinder (6), and the cavity (11) is provided in the cylinder wall of the cylinder (6), and the cavity (11) is communicated with the outside through the air outlet hole (7); The air inlet pipe (4) is used for conveying hot air to the cavity (11); The sealing block is located in the air outlet hole (7) and is used for blocking the communication between the cavity (11) and the outside; The trigger mechanism (9) is used for opening the sealing block when the cylinder (6) is wound around the cable, so that the cavity (11) is communicated with the outside; The trigger mechanism (9) comprises: The trigger block (91) is located outside the opening of the air outlet hole (7) and is used for contacting the cable; The first sleeve (92) is fixed at one end of the trigger block (91) and extends into the air outlet hole (7) at the other end; The center column (93) is located in the first sleeve (92), and the center column (93) is fixed with a vertical rod (94) away from the trigger block (91), and the vertical rod (94) is fixed with a fixed plate (98) at one end and the other end; The second sleeve (95) is sleeved on the outer surface of the vertical rod (94); The spring (97) is wound on the outer surface of the vertical rod (94) and is fixed between the second sleeve (95) and the fixed plate (98); The ball (96) is located between the first sleeve (92), the second sleeve (95) and the center column (93), and the ball (96) is used to drive the second sleeve (95) to move close to the fixed plate (98) when the trigger block (91) is pressed by the cable, and is used to drive the trigger block (91) to reset when the trigger block (91) is released, and the sealing block is used to move with the first sleeve (92) or the second sleeve (95) to open or close the air outlet hole (7).

2. A cable drum according to claim 1, characterised in that: The inner wall of the air outlet hole (7) is provided with a groove, and the groove comprises a first groove (131) and a second groove (132), and the first groove (131) and the second groove (132) are circular and the centers are located on the central axis of the air outlet hole (7); The sealing block comprises a first sealing block (141) and a second sealing block (142), the first sealing block (141) is circular and fixed on the inner side of the first sleeve (92), and extends into the first groove (131) on the outer side, the second sealing block (142) is circular and fixed on the inner side of the second sleeve (95), and extends into the second groove (132) on the outer side; When the trigger block (91) is not pressed by the cable, the first sealing block (141) is close to the side of the first groove (131) near the trigger block (91), and the second sealing block (142) is close to the side of the second groove (132) near the trigger block (91).

3. A cable drum according to claim 2, wherein: The outer surface of the cylinder body (6) is uniformly provided with a plurality of air outlet holes (7), at least one of the plurality of air outlet holes (7) is a main air outlet hole (7), and the rest are slave air outlet holes (7). The cylinder body (6) is provided with a first connecting channel (12) and a second connecting channel (15) in the cylinder wall, the first connecting channel (12) is used for connecting adjacent main air outlet holes (7) and slave air outlet holes (7), one end of the first connecting channel (12) is connected to the bottom of the first groove (131) of the main air outlet hole (7), the other end is connected to the inner wall of the slave air outlet hole (7), and the connection between the first connecting channel (12) and the slave air outlet hole (7) is located between the first groove (131) and the opening of the slave air outlet hole (7). The second connecting channel (15) is used for connecting adjacent slave air outlet holes (7), and the two ends of the second connecting channel (15) are respectively connected to the inner walls of adjacent slave air outlet holes (7), and the connection between the second connecting channel (15) and the slave air outlet hole (7) is located between the first groove (131) and the opening of the slave air outlet hole (7).

4. A cable drum according to claim 2, wherein: The first sealing block (141) and the second sealing block (142) are rubber blocks.

5. A cable drum according to claim 1, characterised in that: The first sleeve (92) gradually increases in diameter from the inside to the outside at the end away from the trigger block (91), thereby forming a tapered cavity for accommodating the ball (96); The center column (93) is provided with a slope at the end close to the second sleeve (95) and the end of the second sleeve (95) close to the center column (93) for abutting against the ball (96); When the trigger block (91) is not pressed by the cable, the ball (96) abuts against the inner wall of the tapered cavity of the first sleeve (92) and the slope on the center column (93) and the second sleeve (95).

6. A cable drum according to claim 5, wherein: The ball (96) is provided with a plurality of.

7. A cable drum according to claim 5, wherein: When the trigger block (91) is not pressed by the cable, the distance between the trigger block (91) and the center column (93) is less than the thickness of the trigger block (91).

8. A cable drum according to claim 1, characterised in that: The top plate (5) is an arc plate with a center located on the central axis of the cylinder body (6).

9. A cable drum according to claim 8, wherein: The air blowing mechanism (8) comprises a first gas conveying pipe (81), a second gas conveying pipe (82) and a gas outlet pipe (83). The first gas conveying pipe (81) is an arc-shaped pipe and is consistent with the arc and arc direction of the top plate (5), and the first gas conveying pipe (81) is fixed to the inner arc surface of the top plate (5); A plurality of first gas conveying pipes (81) are arranged, the second gas conveying pipe (82) is used for connecting the plurality of first gas conveying pipes (81), one end of the gas outlet pipe (83) is communicated with the second gas conveying pipe (82), and the other end is directed to the outer surface of the cylinder body (6).

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