A cable anti-drop device, cable reel, and cable anti-drop method

Abstract

This invention relates to a cable anti-derailment device, a cable reel, and a cable anti-derailment method. The cable anti-derailment device includes a limiting part, a guiding part, and a triggering part. The limiting part is disposed below the guide wheel of the cable reel, and its interior has a limiting groove for cable passage. The guiding part is disposed in the limiting groove to guide the cable to extend from the side end of the limiting part. The triggering part is disposed at the bottom of the limiting groove so that when the cable contacts the triggering part, it triggers the cable reel to stop. This invention not only restricts the cable's running path to a certain extent but also provides a rapid response when the cable's running path deviates, potentially causing the cable to gradually detach from the cable track. This allows the cable reel to stop promptly, preventing equipment failure and damage due to the cable detaching from the cable track, ensuring the cable always runs within the prescribed trajectory. Furthermore, this cable anti-derailment device has a simple structure, is easy to install, and has low manufacturing costs.

Description

Technical Field

[0001] This invention relates to the field of cable equipment technology, and in particular to a cable anti-detachment device, a cable reel, and a cable anti-detachment method. Background Technology

[0002] The variable frequency motor type cable reel is a newly developed type of cable drum. It is a cable winding device that can provide power, control signals, network signals or fiber optic signals for various mobile devices. It can be widely used in various large rail-mounted heavy machinery and equipment, such as stacker-reclaimers, cranes, port machinery and gate hoists.

[0003] Current cable reels are mainly composed of a drive unit, slip ring box, reel, base, and cable guide. They have relatively good protection measures for problems such as loss of motor power, motor overload, and high tension caused by cable pulling. They can effectively prevent cable detachment and damage caused by common conventional faults. However, during the operation of mechanical equipment connected to the cable, they cannot effectively prevent traction faults caused by the cable accidentally touching obstacles such as shovel handles and getting caught. This will cause the cable to change its running path due to being caught and slowly detach from the cable track from multiple directions, resulting in equipment failure and damage.

[0004] Currently, traditional cable reels cannot effectively prevent cable traction failures, thus avoiding equipment malfunctions and damage. Summary of the Invention

[0005] To address the problem that traditional cable reels cannot effectively prevent cable traction failures and thus avoid equipment damage, this invention provides a cable anti-drop device, a cable reel, and a cable anti-drop method.

[0006] To achieve the purpose of this invention, a cable anti-drop device is provided, comprising: a limiting part, which can be disposed below the guide wheel of the cable reel, and the limiting part has a limiting groove for cable passage inside; a guide part, which is disposed in the limiting groove and is used to guide the cable to extend into the limiting part from one side and extend out from the other side; and a trigger part, which is disposed at the bottom of the limiting groove so that the cable reel can be stopped when the cable contacts the trigger part.

[0007] In some specific embodiments, the limiting part includes: two side guards, which are arranged opposite each other to form a limiting groove; a partition, which is disposed between the tops of the two side guards for fixing the two side guards together; and multiple fixing posts are symmetrically arranged on both sides of the partition to strengthen the fixing connection between the two side guards.

[0008] In some specific embodiments, the guide portion includes: a first roller, wherein there are multiple first rollers, which are sequentially disposed below multiple fixed posts and rotatably connected to two side guard plates; and a second roller, wherein there are two second rollers, which are rotatably connected to the two side ends of the two side guard plates via fixed frames; the multiple first rollers and the two second rollers cooperate with each other so that the cable can extend into the limiting groove from one side end of the two side guard plates and pass through the limiting groove or extend out from the other side end of the two side guard plates.

[0009] In some specific embodiments, the triggering part includes: a fixed bracket, two fixed brackets, the top ends of the two fixed brackets being fixedly connected to the two ends of the bottom of the side guard plate respectively; and a trigger switch, two trigger switches, the two trigger switches being respectively disposed at the bottom of the two fixed brackets, the signal output end of the trigger switch being able to transmit a stop command to the cable reel.

[0010] In some specific embodiments, each of the two trigger switches is provided with an actuating arm on one side, so that the two actuating arms can be positioned directly opposite each other below the limiting groove.

[0011] A cable reel based on the same concept includes: a cable anti-detachment device as described in any of the above specific embodiments, wherein the cable anti-detachment device is disposed below the cable reel.

[0012] In some specific embodiments, the signal output terminals of the two trigger switches of the cable anti-drop device are electrically connected to the signal input terminals of the motor of the cable reel, respectively. When the cable contacts the trigger arm of either trigger switch, the trigger switch can send a stop command to the motor of the cable reel.

[0013] In some specific embodiments, the cable reel further includes: a judgment module, wherein the signal output terminals of the two trigger switches are electrically connected to the signal input terminal of the judgment module, and the signal output terminal of the judgment module is electrically connected to the signal input terminal of the motor of the cable reel; a displacement sensor, used to detect the motion trajectory and motion state of the equipment connected to the cable, wherein the signal output terminal of the displacement sensor is electrically connected to the signal input terminal of the judgment module, and the displacement sensor can transmit the detection result to the judgment module; the judgment module can determine whether to intercept the stop command transmitted by the two trigger switches to the motor of the cable reel based on the detection result received from the displacement sensor.

[0014] In some specific embodiments, the judgment module is equipped with a timer that can keep track of a preset time. The judgment module can determine whether to stop the stop command sent by the two trigger switches to the motor of the cable reel based on the detection results of the displacement sensor and the number of times the two trigger switches send stop commands within the preset time.

[0015] A cable anti-detachment method based on the same concept includes the following steps:

[0016] S100: The judgment module determines whether to stop the stop command sent by the two trigger switches to the motor of the cable reel based on the detection result received from the displacement sensor.

[0017] S200: If the displacement sensor detects that the device connected to the cable stops moving at the center point of the cable, the module will stop the stop command sent by the two trigger switches to the motor of the cable reel. Alternatively, if the displacement sensor detects that the device connected to the cable passes the center point of the cable and the two trigger switches are triggered sequentially within the preset time of the timer, the module will stop the stop command sent by the two trigger switches to the motor of the cable reel. Otherwise, if neither of the above situations exists, the module will not stop the stop command sent by the two trigger switches to the motor of the cable reel.

[0018] S300: After the cable reel motor receives a stop command and stops, the operator must check that the cable reel is normal before restarting the cable reel motor.

[0019] The beneficial effects of this invention are:

[0020] The cable anti-detachment device of this invention not only restricts the cable's running path to a certain extent, but also responds quickly when the cable's running path deviates, potentially causing the cable to gradually detach from the cable track. This allows the cable reel to stop in time, preventing equipment failure and damage caused by the cable detaching from the track, and ensuring that the cable always runs within the prescribed trajectory. Furthermore, this cable anti-detachment device has a simple structure, is easy to install, and has low manufacturing costs.

[0021] The cable reel involved in this invention can respond quickly and stop the machine in time when the cable's running path deviates, potentially causing the cable to gradually detach from the cable track. This prevents equipment failure and damage caused by the cable detaching from the track and ensures that the cable always runs within the prescribed trajectory. Furthermore, it only requires the addition of a cable anti-detachment device to the existing cable reel, without much modification, making installation convenient and the modification cost low.

[0022] The cable anti-detachment method of the present invention can respond quickly and stop the machine in time when the cable's running path deviates and the cable may gradually deviate from the cable track, so as to avoid equipment failure and damage caused by the cable deviating from the cable track. It ensures that the cable can always run in the prescribed track. At the same time, when the mechanical equipment connected to the cable is located in a specific position or meets specific conditions, even if the cable's running path deviates, the cable reel will not stop. It can ensure that the mechanical equipment connected to the cable can operate normally while minimizing the risk of equipment failure and damage caused by the cable deviating from the cable track. Attached Figure Description

[0023] Figure 1 These are schematic diagrams illustrating the structure of some specific embodiments of the cable anti-loosening device of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of some specific embodiments of a cable anti-detachment device from another perspective;

[0025] Figure 3 This is a schematic diagram of the working process of a cable anti-detachment method according to the present invention.

[0026] In the attached drawings, 100 is the limiting part; 110 is the side guard plate; 120 is the partition plate; 200 is the guide part; 210 is the first roller; 220 is the second roller; 300 is the trigger part; 310 is the fixed support; and 320 is the trigger switch. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0029] In the description of this invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axis", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," "linking," "hinging," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Reference Figure 1 , Figure 2 and Figure 3 A cable anti-drop device includes a limiting part 100, a guiding part 200, and a triggering part 300. The limiting part 100 is disposed below the guide wheel of a cable reel, and its interior has a limiting groove for cable passage. The guiding part 200 is disposed in the limiting groove to guide the cable to extend into the limiting part 100 from one side and extend out from the other side. The triggering part 300 is disposed at the bottom of the limiting groove so that when the cable contacts the triggering part 300, it triggers the cable reel to stop.

[0033] Specifically, the limiting part 100 is a hollow structure without frame at the top, bottom, and sides. The hollow portion of the limiting part 100 forms a limiting groove, through which the cable extending from the cable reel can pass. The limiting groove restricts the cable's running direction to a certain extent, reducing the probability of the cable deviating from the cable track. The guide part 200 is located in the limiting groove of the limiting part 100. The guide part 200 allows the cable passing through the limiting groove to extend from a specific position on the side of the limiting part 100, restricting the cable's extension direction and facilitating cable connection to other mechanical equipment. The trigger part 300 is located at the bottom of the limiting part 100, directly facing the limiting groove. When the cable's running path deviates, the cable in the limiting groove will touch the trigger part 300, thus stopping the cable reel in time and preventing equipment damage caused by the cable detaching from the cable track.

[0034] In some specific embodiments of the present invention, the limiting part 100 includes a side guard plate 110 and a partition plate 120. There are two side guard plates 110, which are arranged opposite each other to form a limiting groove. The partition plate 120 is disposed between the tops of the two side guard plates 110 for fixing the two side guard plates 110 together. Multiple fixing posts are symmetrically arranged on both sides of the partition plate 120 to strengthen the fixing connection between the two side guard plates 110.

[0035] Specifically, two side guard plates 110 are positioned opposite each other, with a gap between them forming a limiting groove. A partition 120 is positioned between the tops of the two side guard plates 110, and the two side plates are fixedly connected by the partition 120. The height of the partition 120 is much smaller than the height of the two side guard plates 110. This allows the cable to pass through the lower half of the limiting groove without affecting its passage. Furthermore, the partition 120 occupies minimal space in the limiting groove, ensuring that if the cable's path deviates, it will not prevent the cable in the limiting groove from contacting the trigger part 300. This avoids the cable reel failing to stop due to the partition 120 blocking the cable, thus preventing equipment malfunction and damage. Fixed posts are provided on both sides of the partition 120. The partition 120 is strengthened to connect with the two side guards 110 through the fixed posts, making the connection between the partition 120 and the two side guards 110 more secure, and in turn, making the connection between the two side guards 110 more secure. The two side guards 110 have an "eight"-shaped flared structure design. The flare is smooth, the opening is large, and the proportions are coordinated, allowing the cable to pass smoothly through the limiting groove without affecting the cable contact trigger part 300.

[0036] In some specific embodiments of the present invention, the guide portion 200 includes a first roller 210 and a second roller 220. There are multiple first rollers 210, which are sequentially disposed below multiple fixed posts and rotatably connected to two side guard plates 110. There are two second rollers 220, which are rotatably connected to the two side ends of the two side guard plates 110 via fixing frames. The multiple first rollers 210 and the two second rollers 220 cooperate with each other so that the cable can extend into the limiting groove from one side end of the two side guard plates 110 and pass through the limiting groove, or extend out from the other side end of the two side guard plates 110.

[0037] Specifically, there are four first rollers 210, located below the fixing posts on both sides of the partition 120. Two first rollers 210 are sequentially arranged below the fixing posts on one side of the partition 120, and two first rollers 210 are sequentially arranged below the fixing posts on the other side of the partition 120. The positions of the first rollers 210 on both sides are symmetrical. The two ends of each first roller 210 are rotatably connected to the opposite surfaces of the two side guard plates 110 by bolts. The cable can extend into the limiting groove between the two first rollers 210 on one side, pass through the limiting groove, and then extend out of the limiting groove between the two first rollers 210 on the other side, making the process of the cable passing through the limiting groove smoother. Two second rollers 220 are rotatably arranged on the outer sides of the two side guard plates 110 by fixing brackets. They can provide a certain lifting effect for the cable extending into and extending out of the limiting groove, so that the cable can accurately enter and exit the limiting groove. The first roller 210 and the second roller 220 cooperate with each other, allowing the cable released from the cable reel to enter the limiting groove from one end of the two side guards 110, and then exit the limiting groove from the other end of the two side guards 110 after smoothly passing through the limiting groove. This avoids the cable getting stuck in the limiting groove and touching the trigger 300, which would cause the cable reel to stop and result in a shutdown error.

[0038] In some specific embodiments of the present invention, the triggering unit 300 includes a fixed bracket 310 and a trigger switch 320. There are two fixed brackets 310, with their top ends fixedly connected to both ends of the bottom of the side guard plate 110. There are also two trigger switches 320, each disposed at the bottom of one of the two fixed brackets 310. The signal output terminals of the trigger switches 320 can transmit a stop command to the cable reel.

[0039] Specifically, the fixed support 310 has an "L"-shaped structure. The top ends of the two fixed supports 310 are fixedly connected to the two ends of the bottom of the side guard plate 110, and the two fixed supports 310 are positioned close to the second rollers 220 on both sides of the two side guard plates 110. The two trigger switches 320 are fixed to the bottom of the two fixed supports 310, so that the position on the trigger switch 320 for cable triggering is directly opposite the limiting groove, making it easy for the cable to touch the trigger switch 320. When the cable deviates, the cable can touch the trigger switch 320 immediately, thereby stopping the cable reel and preventing the cable from leaving the cable track.

[0040] It should be noted that the two fixed supports 310 can be set at the bottom of the same side guard plate 110, or they can be set at the bottom of the two side guard plates 110 respectively, as long as the two trigger switches 320 can be directly opposite the limit groove.

[0041] In some specific embodiments of the present invention, each of the two trigger switches 320 is provided with an actuating arm on one side, so that the two actuating arms can be respectively positioned directly opposite each other below the limiting groove.

[0042] Specifically, a trigger arm is provided on one side of the trigger switch 320, extending from below one side guard plate 110 to below the other side guard plate 110, facilitating cable contact. When the cable contacts the trigger arm, it is considered to have contacted the trigger switch 320, stopping the cable reel. The horizontal distance between the trigger arms of the two trigger switches is 30 cm, and the horizontal distance between the trigger arms of each trigger switch and the closest end of each side guard plate 110 is 5 cm. This improves the accuracy of the trigger switches in stopping the cable reel without affecting normal cable operation. Furthermore, the length of each trigger arm is the same as the distance between the two side guard plates 110, allowing for full coverage of the limiting groove, facilitating cable contact. Simultaneously, the two trigger switches are ANDed; as long as the cable contacts either trigger switch, the cable reel will stop. Furthermore, the trigger arms of the two touch switches have a certain strength and can withstand a certain mechanical impact. The overall structure is stable and has strong vibration resistance, which prevents the cable reel from stopping due to the cable only slightly touching the trigger arm of the touch switch, thus affecting normal operation.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The present invention also provides a cable reel, including a cable anti-detachment device as described in any of the above specific embodiments, wherein the cable anti-detachment device is disposed below the cable reel.

[0044] In some specific embodiments of the present invention, the signal output terminals of the two trigger switches 320 of the cable anti-detachment device are electrically connected to the signal input terminals of the motor of the cable reel, respectively. When the cable contacts the trigger arm of either trigger switch 320, the trigger switch 320 can send a stop command to the motor of the cable reel. This establishes an AND gate relationship between the two trigger switches, meaning that as long as the cable contacts either trigger switch, a stop command can be directly sent to the motor of the cable reel, providing dual protection. Even if the cable breaks through the first trigger switch 320 due to inertia, the second trigger switch 320 will still be activated, improving stopping efficiency.

[0045] When the cable is hooked by an obstacle such as a shovel handle, the cable may extend upwards towards the two side guard plates 110. At this time, the cable will stop running for about 3 seconds, causing the cable in the limit groove to become temporarily weak, causing it to droop and touch the trigger arm of the trigger switch 320, thereby stopping the motor of the cable drum.

[0046] When the cable is hooked by an obstacle such as a shovel handle, the cable may extend downwards towards the two side guard plates 110. At this time, the cable in the limit groove will touch the trigger arm of the trigger switch 320, thereby stopping the motor of the cable reel.

[0047] When the cable is hooked by an obstacle such as a shovel handle, the cable may extend to the sides of the two side guard plates 110. At this time, the cable in the limiting groove will arch due to the reverse force and will touch the trigger arms of the two trigger switches 320 in sequence, thereby stopping the motor of the cable drum.

[0048] In some specific embodiments of the present invention, the cable reel further includes a judgment module and a displacement sensor. The signal output terminals of the two trigger switches 320 are electrically connected to the signal input terminal of the judgment module, and the signal output terminal of the judgment module is electrically connected to the signal input terminal of the cable reel's motor. The displacement sensor is used to detect the motion trajectory and motion state of the equipment connected to the cable. The signal output terminal of the displacement sensor is electrically connected to the signal input terminal of the judgment module, and the displacement sensor can transmit the detection results to the judgment module. The judgment module can determine whether to intercept the stop command transmitted by the two trigger switches 320 to the cable reel's motor based on the received detection results from the displacement sensor.

[0049] Specifically, the cable will be connected to heavy machinery such as stacker-reclaimers, cranes, port machinery, and gate hoists. Displacement sensors are installed on these heavy machinery to detect whether the heavy machinery has stopped operating at the center point of the cable on the track. If the displacement sensor detects that the heavy machinery has stopped moving at the center point of the cable on the track and is stationary, the displacement sensor will send the detection result to the judgment module. This means that even if the cable touches any trigger switch 320 and causes the trigger switch 320 to send a stop command, the stop command will be intercepted by the judgment module before it enters the motor of the cable reel, so that the motor of the cable reel cannot receive the stop command and the cable can continue to operate normally.

[0050] In some specific embodiments of the present invention, the judgment module is equipped with a timer that can keep time for a preset period of time. The judgment module can determine whether to intercept the stop command sent by the two trigger switches 320 to the motor of the cable reel based on the detection results received by the displacement sensor and the number of times the two trigger switches 320 send stop commands within the preset time.

[0051] Specifically, the displacement sensor can also be used to detect whether the heavy machinery has passed the center point of the cable on the track. If the displacement sensor detects that the heavy machinery has passed the center point of the cable on the track, it will send the detection result to the judgment module. After receiving the detection result, the timer in the judgment module will start counting down for 5 seconds. This is because after the heavy machinery passes the center point of the cable on the track, the cable may be in a vertical state for about 5 seconds, triggering two contact switches in sequence. Therefore, if the two contact switches send a stop command in sequence within the 5-second countdown, both stop commands will be intercepted by the judgment module, thus avoiding disruption to the normal operation of the equipment.

[0052] Reference Figure 1 , Figure 2 and Figure 3 The present invention also provides a method for preventing cable detachment, comprising the following steps:

[0053] S100: The judgment module determines whether to stop the stop command sent by the two trigger switches 320 to the motor of the cable reel based on the detection results received from the displacement sensor.

[0054] S200: If the displacement sensor detects that the device connected to the cable stops moving at the center point of the cable, the module will stop the stop command sent by the two trigger switches 320 to the motor of the cable reel. Alternatively, if the displacement sensor detects that the device connected to the cable passes the center point of the cable and the two trigger switches 320 are triggered sequentially within the preset time of the timer, the module will stop the stop command sent by the two trigger switches 320 to the motor of the cable reel. Otherwise, if neither of the above situations exists, the module will not stop the stop command sent by the two trigger switches 320 to the motor of the cable reel.

[0055] S300: After the cable reel motor receives a stop command and stops, the operator must check that the cable reel is normal before restarting the cable reel motor.

[0056] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "a specific embodiment" or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cable anti-detachment device, characterized in that, include: A limiting part is provided, which can be disposed below the guide wheel of the cable reel, and the limiting part is provided with a limiting groove for the cable to pass through. A guide portion, which is disposed in the limiting groove, is used to guide the cable to extend into the limiting portion from one side and extend out from the other side. A triggering part is provided at the bottom of the limiting groove so that when the cable contacts the triggering part, the cable reel can be triggered to stop. The limiting part includes: Side guards, there are two side guards, the two side guards are arranged facing each other to form the limiting groove; A partition is disposed between the tops of two side panels for fixing the two side panels together. Multiple fixing posts are symmetrically arranged on both sides of the partition to strengthen the fixed connection between the two side guards; The guide section includes: The first roller, there are multiple first rollers, and the multiple first rollers are respectively arranged below the multiple fixed columns and are rotatably connected to the two side guard plates; The second roller, there are two second rollers, and the two second rollers are rotatably connected to the two sides of the two side guard plates respectively through the fixing frame; The plurality of first rollers and two second rollers cooperate with each other so that the cable can be inserted into the limiting groove from one side end of the two side guards and pass through the limiting groove or be extended from the other side end of the two side guards; The triggering unit includes: The fixed brackets are two in number, and the top ends of the two fixed brackets are respectively fixedly connected to the two ends of the bottom of the side guard plate; Two trigger switches are provided, each located at the bottom of one of the two fixed supports. The signal output terminals of the trigger switches can send a stop command to the cable reel. Each of the two trigger switches has an actuating arm on one side, so that the two actuating arms can be positioned directly opposite each other below the limiting groove.

2. A cable reel, characterized in that, include: The cable anti-detachment device as described in claim 1 is disposed below the cable reel.

3. A cable reel according to claim 2, wherein, The signal output terminals of the two trigger switches of the cable anti-detachment device are electrically connected to the signal input terminals of the motor of the cable reel. When the cable contacts the trigger arm of any one of the trigger switches, the trigger switch can send a stop command to the motor of the cable reel.

4. A cable reel according to claim 3, wherein, The cable reel also includes: The judgment module has its signal output terminals of the two trigger switches electrically connected to the signal input terminal of the judgment module, and the signal output terminal of the judgment module is electrically connected to the signal input terminal of the motor of the cable reel. A displacement sensor is used to detect the motion trajectory and motion state of the device connected to the cable. The signal output terminal of the displacement sensor is electrically connected to the signal input terminal of the judgment module. The displacement sensor can transmit the detection result to the judgment module. The judgment module can determine whether to stop the stop command sent by the two trigger switches to the motor of the cable reel based on the detection results received from the displacement sensor.

5. A cable reel according to claim 4, wherein, The judgment module is equipped with a timer, which can keep time for a preset period of time; The judgment module can determine whether to stop the stop commands sent by the two trigger switches to the motor of the cable reel based on the detection results received by the displacement sensor and the number of times the two trigger switches send stop commands within the preset time.

6. A method for preventing cable detachment from a cable reel according to claim 5, characterized in that, Includes the following steps: S100: The judgment module determines whether to stop the stop command sent by the two trigger switches to the motor of the cable reel based on the detection result received by the displacement sensor. S200: If the detection result of the displacement sensor shows that the device connected to the cable stops moving at the center point of the cable, the judgment module stops the stop command sent by the two trigger switches to the motor of the cable reel. Alternatively, if the detection result of the displacement sensor shows that the device connected to the cable passes the center point of the cable and the two trigger switches are triggered sequentially within the preset time of the timer, the judgment module stops the stop command sent by the two trigger switches to the motor of the cable reel. Otherwise, if neither of the above situations exists, the judgment module will not stop the stop command sent by the two trigger switches to the motor of the cable reel. S300: After the motor of the cable reel receives a stop command and stops, the operator must check that the cable reel is normal before the motor of the cable reel can be restarted.

Images