Rail travel type crane cable reel cable pressing prediction device and use method thereof

Abstract

The application discloses a track walking type crane cable reel cable pressing prediction device and a use method thereof and belongs to the technical field of walking cranes. The track walking type crane cable reel cable pressing prediction device comprises a reel body fixed on a mounting beam of a crane support, further comprises: a mounting plate fixed on the lower side of the crane support, a guide pipe rotatably connected to the mounting plate through a rotating shaft, and a cable body wound on the reel body and slidably connected in the guide pipe; a side plate arranged on one side of a track body, a threading hole for the cable body to pass through is formed in the side plate, an intermediate anchor point is arranged on the upper side of the threading hole of the track body; and a sensor group; according to the action characteristics of the guide pipe and the cable posture in the walking process of the crane, the walking crane cable pressing prediction is realized by using the mechanical structure and the plurality of sensors, the cable pressing is avoided, the safe and reliable operation of the equipment is ensured, and the problem of insufficient cable protection of the current walking crane is solved.

Description

Technical Field

[0001] This invention relates to the field of mobile crane technology, and in particular to a cable reel clamping prediction device for a track-mounted mobile crane and its usage method. Background Technology

[0002] Rail-mounted cranes are widely used in ports, docks, shipyards, and other similar settings. Their power supply typically relies on a cable reel system that moves with the crane. To ensure cable life and equipment safety, the reel system must maintain appropriate cable tension during the crane's reciprocating motion. Existing technologies often use electric motors or hydraulic motors for drive and incorporate friction plate torque couplings or hysteresis couplings to limit maximum tension. Some systems also integrate cable over-tightness detection and shutdown functions.

[0003] Despite possessing basic over-tightening protection, existing technology has significant shortcomings in dealing with cable "slack" conditions, leading to frequent "cable crushing" accidents. The fundamental problems are: First, the function is limited and lacks predictability. Existing devices cannot effectively identify the critical state of the cable transitioning from "tensioned" to "slack." When the reel fails to reel in the cable due to drive failure, coupling slippage, or control malfunction, the system cannot provide an early warning before the cable sags, missing the optimal opportunity for risk intervention. Second, the protection mechanism is passive and lacks active physical protection. Even if the operator receives an alarm, if the crane does not stop in time, the slack cable will accumulate on the track surface and eventually be crushed by the crane's traveling wheels, causing irreversible and severe damage such as insulation damage and internal core wire breakage. This "post-accident repair" approach cannot fundamentally prevent accidents. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a cable reel clamping prediction device for a track-walking crane and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A track-mounted crane cable reel clamping prediction device includes a reel body fixed on a mounting beam of a crane support, a cable reel motor for driving the reel body is mounted on the mounting beam, and further includes:

[0007] Mounting plate, which is fixed to the lower side of the crane bracket, and a guide tube is rotatably connected to the mounting plate via a rotating shaft, and the cable body wound on the reel body is slidably connected inside the guide tube;

[0008] Side plate, the side plate is set on one side of the track body, the side plate is provided with a wire hole for the cable body to pass through, and the track body side is provided with a middle anchor point above the wire hole;

[0009] And a sensor group, which is mounted on the mounting plate, is used to detect whether the guide tube is located at the working position corresponding to the tension of the cable body, whether it passes through the intermediate anchor point, and whether it is in a state indicating that the cable body is too tight;

[0010] The sensor group is electrically connected to a control circuit.

[0011] Preferably, the sensor group includes:

[0012] The left-side sensor is used to detect that the guide tube is in the left-side working position;

[0013] The right-side sensor is used to detect that the guide tube is in the right-side working position;

[0014] A slack sensor is positioned between the left and right position sensors to detect the slack state of the cable body.

[0015] The intermediate anchor position sensor is used to detect when the crane passes through the intermediate anchor point.

[0016] Preferably, the sensor group further includes overtightness sensors disposed on the left and right sides of the mounting plate for detecting the overtightness of the cable body, and the mounting plate is provided with a tension spring at each overtightness sensor.

[0017] Preferably, the control circuit is electrically connected to the sensor group via a wire;

[0018] When the sensor group detects that the guide tube has passed the intermediate anchor point, the locking of the previous working position is released;

[0019] When the sensor group detects that the cable body is too tight, it outputs a crane stop control signal;

[0020] When the guide tube disengages from a locked working position and fails to reach the intermediate anchor point, the sensor group generates a corresponding signal change, and the control circuit outputs a cable pressure warning signal for the crane accordingly.

[0021] The control circuit outputs a cable clamping warning signal for the crane, which is determined by the signal loss of the left or right position sensor and the signal change of the slack sensor.

[0022] Preferably, the side plate is symmetrically provided with lifting components on both sides of the wire hole, which are used to lift the cable body upward when it is in a slack state;

[0023] The lifting assembly includes an ear plate fixed to the side plate, a swing plate rotatably mounted on the ear plate via a pin, and a U-shaped bracket mounted at the end of the swing plate. A torsion spring for driving the swing plate to reset and rotate is mounted on the pin, and a limiting mechanism for restricting the movement of the swing plate is also provided on the side plate.

[0024] Preferably, the limiting mechanism includes a limiting component for limiting the movement of the swing plate and a triggering component for releasing the limiting component from restricting the swing plate;

[0025] The limiting component includes a fixed seat fixed on the side plate, a movable groove opened on the fixed seat, a limiting block slidably connected in the movable groove, and a compression spring disposed between the inner wall of the movable groove and the limiting block. The end of the limiting block away from the compression spring is provided with a first force-bearing inclined surface, and the top of the U-shaped bracket is provided with a limiting groove that cooperates with the limiting block.

[0026] Preferably, the triggering component includes a force-bearing block that is slidably connected in the fixed seat and moves against the limiting block, a force-bearing plate fixed on the top of the force-bearing block, arc-shaped plates on both sides of the force-bearing plate, and an elastic telescopic rod disposed between the force-bearing plate and the fixed seat.

[0027] The limiting block is provided with a force groove for the movement of the force block, and the inner wall of the force groove is provided with a second force inclined surface that moves against the bottom of the force block.

[0028] Preferably, the side plate is fixed with a sleeve at the wire hole, and the sleeve is provided with a drum that cooperates with two sets of lifting components. Each drum is provided with a pull rope connected to the end of one side swing plate. The bottom of the side plate is provided with a fixed pulley for guiding the pull rope through a connecting plate.

[0029] A movable gear is provided on the outside of the sleeve, and a rack plate that meshes with the movable gear is provided at the bottom of the crane bracket via a connecting plate.

[0030] Preferably, the crane support is provided with a guide plate that is inclined to the crane traveling wheels, the distance between the guide plate and the track body is less than the diameter of the cable body, and an arc-shaped anti-overrun plate is provided on the top of the guide plate.

[0031] This invention also discloses a method for using a cable reel clamping prediction device for a track-mounted crane, which further includes the following steps:

[0032] S1: Normal walking and condition monitoring:

[0033] The crane travels on the track body, and the cable reel motor drives the reel body to wind up and unwind the cable body, maintaining tension. The guide tube guides the cable body.

[0034] The sensor array continuously monitors the position of the guide tube, and the control circuit determines that the cable body is in normal condition based on the sensor signals. The device does not interfere with the operation of the crane.

[0035] S2: Cable crush warning:

[0036] When the cable reel body experiences abnormal winding and the cable body becomes loose and droops, the guide tube will shift due to tension changes.

[0037] If the control circuit detects that the left or right position sensor signal is lost and the slack sensor detects that the cable body has entered a slack state, it will output a cable compression warning signal. At this time, the system will issue an early warning, indicating that there is a risk of cable compression.

[0038] S3: Mechanical protection activated.

[0039] At the same time, the drooping cable body will naturally press on the force plate of the same side support component. The arc plates on both sides of the force plate prevent the cable from slipping. After the force plate is subjected to force, it compresses the elastic telescopic rod and pushes the force block at its bottom down. The bottom of the force block interacts with the second force inclined surface in the force groove, generating a force that causes the limiting block to retract into the fixed seat. The limiting block squeezes the compression spring, causing it to exit from the limiting groove of the U-shaped bracket, thereby releasing the limitation on the swing plate.

[0040] Driven by the torsion spring on the pin shaft, the swing plate quickly flips upward and resets, causing the U-shaped bracket at the end to rise and lift the slack cable body section into the air, separating it from the surface of the track body, thus fundamentally avoiding cable compression.

[0041] S4: Assisted Clearance and Obstacle Crossing Protection

[0042] In the forward direction of the crane's traveling wheels, the gap between the lower edge of the inclined guide plate and the track body is smaller than the cable diameter. Even if a very small portion of the cable is not fully lifted, the guide plate can push the cable body away from the track body before the crane's traveling wheels arrive. The arc-shaped anti-overrun plate at the top ensures that the cable body will not overrun the guide plate when it is pushed, thus ensuring the cleaning effect.

[0043] S5: State Switching and Automatic Reset:

[0044] When the crane finishes dealing with the fault and continues to move and pass through the intermediate anchor point, the rack plate at the bottom of the crane support will engage with the movable gear on the outside of the casing.

[0045] As the crane moves, the rack plate drives the movable gear and the sleeve to rotate, and the sleeve drives two drums to rotate. One drum winds up the rope, and the other drum releases the rope.

[0046] After the winding rope changes direction through the fixed pulley, it pulls the swing plate that was flipped up due to the protective action, causing it to rotate downward against the torsion spring force. During the downward rotation of the swing plate, the U-shaped bracket will squeeze the first force-bearing inclined surface of the limiting block, causing the limiting block to temporarily retract and avoid. When the U-shaped bracket at the end of the swing plate rotates into place, its limiting groove is exactly aligned with the limiting block. The limiting block is quickly inserted into the limiting groove under the push of the compression spring, locking the swing plate back into the standby position.

[0047] At this point, the lifting assembly on one side, which was originally lifting, has been reset. The lifting assembly on the other side is now ready to deal with any possible slack in the cable body on that side, as the swing plate is no longer being pulled by the rope.

[0048] Compared with the prior art, the present invention provides a cable reel clamping prediction device for a track-mounted crane and its usage method, which has the following beneficial effects:

[0049] 1. In this invention, when the cable reel malfunctions, the cable tension decreases, and the guide tube deflects from the tensioned "working position" (left or right). The control circuit, through real-time analysis of sensor signals, can accurately identify the critical state of initial cable slack and promptly issue a cable pressure warning signal. This allows the system to issue an alarm to the operator before the cable sags to the track, providing valuable intervention time and nipping the accident in the bud. It fundamentally changes the passive situation of only being able to remedy the situation after the fact, realizing a leap from passive response to active prediction and solving the fundamental problem that existing technologies cannot provide early warning of cable slack.

[0050] 2. In this invention, when the cable droops and presses against the force plate, the limit is released through the interaction between the force block and the second force inclined surface. The swing plate quickly flips upward under the action of the torsion spring, and the U-shaped bracket forcibly lifts the cable away from the track. It does not rely on electricity and operates solely based on physical principles. Even if the early warning system fails or the crane does not stop in time, it can serve as a last line of defense to effectively prevent cable pressure. This greatly improves the overall reliability of the entire device and constructs a dual safety barrier of electrical early warning and mechanical protection, solving the problem of insufficient reliability of single protection measures.

[0051] 3. In this invention, when the crane travels through the intermediate anchor point, the rack plate fixed on the crane support drives the movable gear to rotate, which in turn drives the sleeve and the drums on both sides to rotate. The drums precisely control the state switching of the lifting components on both sides by winding and unwinding the pull rope: on the side about to enter the working area, the pull rope is released and the lifting component enters the standby state; on the side about to leave the working area, the pull rope is wound up, pulling the swing plate downward against the torsional spring force, and automatically relocking through the cooperation of the limit block and the limit groove. The whole process does not require manual intervention, ensuring that the device can provide fully automatic and uninterrupted protection during the crane's reciprocating movement, significantly improving the automation level and operating efficiency of the equipment.

[0052] 4. In this invention, by setting an inclined guide plate with a gap between its lower edge and the track body smaller than the cable diameter, for the very small portion of cable that is not completely removed by the lifting component, the advancing crane will cause the guide plate to act like a scraper, completely pushing and sweeping it out of the track range before the traveling wheels arrive. The arc-shaped anti-crossing plate set on the top of the guide plate can effectively prevent the cable from "climbing" along the inclined surface and crossing the guide plate due to elasticity during the pushing process, ensuring the absolute effectiveness of the cleaning action. The guide plate and the lifting component complement each other, forming a comprehensive protection network from "air lifting" to "ground sweeping", further strengthening the protection effectiveness of this device under various complex working conditions and solving the risk of cable residue under complex working conditions. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the structure of the present invention;

[0054] Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle;

[0055] Figure 3 This is a schematic diagram of the external structure of the side plate of the present invention;

[0056] Figure 4 for Figure 3 Enlarged structural diagram of section B in the middle;

[0057] Figure 5 This is a schematic diagram of the external structure of the thread hole of the present invention;

[0058] Figure 6 for Figure 3 The front view;

[0059] Figure 7 This is a schematic diagram of the external structure of the sleeve of the present invention;

[0060] Figure 8 This is a schematic cross-sectional view of the side plate of the present invention;

[0061] Figure 9 This is a schematic diagram of the external structure of the fixing base of the present invention;

[0062] Figure 10 This is a schematic diagram of the external structure of the limiting block of the present invention;

[0063] Figure 11 This is a schematic diagram of the structure of the guide plate and the track body of the present invention.

[0064] In the diagram: 1. Crane support; 101. Mounting beam; 102. Crane travel wheel; 2. Reel body; 201. Cable reel motor; 202. Cable body; 3. Mounting plate; 301. Shaft; 302. Guide tube; 303. Tension spring; 4. Side plate; 401. Cable hole; 5. Track body; 501. Intermediate anchor point; 6. Sensor group; 601. Left position sensor; 602. Right position sensor; 603. Relaxation sensor; 604. Intermediate anchor sensor; 605. Overtight sensor; 7. Ear plate; 701. Pin shaft 702, Swing plate; 703, U-shaped bracket; 7031, Limiting groove; 8, Fixed seat; 801, Movable groove; 802, Limiting block; 8021, First force-bearing inclined surface; 803, Compression spring; 9, Force-bearing block; 901, Force-bearing plate; 902, Arc-shaped plate; 903, Elastic telescopic rod; 10, Force-bearing groove; 1001, Second force-bearing inclined surface; 11, Sleeve; 111, Drum; 112, Pull rope; 113, Fixed pulley; 114, Movable gear; 12, Rack plate; 13, Guide plate; 131, Arc-shaped anti-overrun plate. Detailed Implementation

[0065] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0066] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0068] like Figures 1 to 3As shown, this embodiment proposes a track-mounted crane cable reel clamping prediction device, including a reel body 2 fixed on a mounting beam 101 of the crane support 1, a cable reel motor 201 for driving the reel body 2 is provided on the mounting beam 101, and further includes:

[0069] Mounting plate 3 is fixed to the lower side of crane bracket 1. A guide tube 302 is rotatably connected to the mounting plate 3 via a rotating shaft 301. The cable body 202 wound on the reel body 2 is slidably connected inside the guide tube 302. The rotatable guide tube 302 is used as a sensing mechanism to convert the invisible cable tension change into a tangible mechanical angular displacement, which is then converted into an electrical signal by the sensor group 6. This mechanical-electrical conversion method is simple, direct, and reliable, avoiding potential failure points of complex mechanisms.

[0070] Side plate 4 is provided on one side of the track body 5. A wire hole 401 for the cable body 202 to pass through is provided on the side plate 4. An intermediate anchor point 501 is provided on the side of the track body 5 above the wire hole 401.

[0071] And sensor group 6, which is mounted on mounting plate 3, is used to detect whether guide tube 302 is in the working position corresponding to the tension of cable body 202, whether it passes through intermediate anchor point 501, and whether it is in a state indicating that cable body 202 is too tight.

[0072] The sensor group 6 is electrically connected to the control circuit. The sensor group 6 includes a left position sensor 601, a right position sensor 602, a slack sensor 603, and an intermediate anchor position sensor 604. By combining the signals from the left position sensor 601, the right position sensor 602, and the slack sensor 603, the device can sensitively detect the critical change in the cable state from "tensioned" to "initial slack" and issue a cable pressure warning signal before the cable sags onto the track. This provides valuable processing time for operators, changing the situation where traditional devices can only passively respond to over-tensioning or cable pressure accidents, and realizing proactive safety management.

[0073] The intermediate anchor point 501 and intermediate anchor position sensor 604, combined with control logic, can automatically identify the travel range of the crane. When the crane passes through the intermediate anchor point 501, the system automatically releases the lock on the old state and prepares to lock the new state, realizing seamless switching of protection logic. The whole process does not require manual intervention, ensuring that the device can work continuously and correctly throughout the entire working cycle of the crane's reciprocating travel, thus improving the automation level and reliability of the equipment.

[0074] Furthermore, the sensor group 6 also includes overtightness sensors 605 disposed on the left and right sides of the mounting plate 3 for detecting the overtightness of the cable body 202. The mounting plate 3 is provided with tension springs 303 at each overtightness sensor 605.

[0075] Furthermore, the control circuit is electrically connected to sensor group 6 via wires;

[0076] When sensor group 6 detects that guide tube 302 has passed the intermediate anchor point 501, the lock on the previous working position is released.

[0077] When sensor group 6 detects that the cable body 202 is too tight, it outputs a crane stop control signal;

[0078] When the guide tube 302 disengages from a locked working position and fails to reach the intermediate anchor point 501, the sensor group 6 generates a corresponding signal change, and the control circuit outputs a cable pressure warning signal for the crane accordingly.

[0079] The control circuit outputs a cable clamping warning signal for the crane, which is determined by the loss of signal from the left position sensor 601 or the right position sensor 602, combined with the signal change of the relaxation sensor 603.

[0080] Specifically, firstly, the reel body 2 is securely mounted on the mounting beam 101 of the crane bracket 1 and driven by the cable reel motor 201. Then, a mounting plate 3 is installed on the lower side of the crane bracket 1. The mounting plate 3 is hinged to a guide tube 302 via a pivot 301. After the cable body 202 is led out from the reel, it passes through this guide tube 302, thereby converting the tension change of the cable into the angular displacement of the guide tube 302 around the pivot 301. A side plate 4 is fixed next to the track, and a wire hole 401 is opened on it as a fixed path point for the cable body 202. An intermediate anchor point 501 is clearly set on the side of the track body 5, above the wire hole 401. This anchor point is the geographical reference for the device to switch logical states. A sensor group 6 is arranged on the mounting plate 3, and then all sensor signals are connected to the control circuit. The control circuit is programmed and configured to process the sensor signals and execute the aforementioned control logic.

[0081] When the crane starts operating, the control circuit locks the current working position (e.g., "right position") of the guide tube 302 via signals from the left position sensor 601 or the right position sensor 602. During the crane's movement, the sensor group 6 continuously monitors the state of the guide tube 302, and the cable reel motor 201 reels and unwinds the cable according to the crane's direction of travel, attempting to maintain cable tension. If the cable body 202 becomes too tight due to improper release, it will force the guide tube 302 to compress the tension spring 303 and trigger the over-tightness sensor 605. Upon receiving this signal, the control circuit immediately outputs a crane stop control signal to prevent the cable from being pulled apart. If the reel reels abnormally reel in the cable (e.g., slippage), the cable body 202 will loosen, and the guide tube 302 will release from its locked position due to reduced tension. When the working position (e.g., right position) deviates, the specific judgment logic is as follows: when the control circuit detects the loss of signal from the left position sensor 601 or the right position sensor 602, and the slack sensor 603 simultaneously detects that the cable has entered a slack state, it is determined that there is a risk of cable compression. At this time, the control circuit outputs a cable compression warning signal to remind the operator to intervene. When the crane moves and passes through the intermediate anchor point 501, the intermediate anchor sensor 604 is triggered, and the control circuit releases the lock on the previous working position (e.g., right position). When the guide tube 302 moves to the other working position and is detected by the corresponding sensor (at this time, the left position), the circuit locks the new working position, and the device continues to perform the above monitoring and protection functions within the new travel range.

[0082] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, in a preferred embodiment, based on the above method, the side plate 4 is further provided with lifting components symmetrically arranged on both sides of the wire hole 401, which are used to lift the cable body 202 upward when it is in a relaxed state.

[0083] The lifting assembly includes an ear plate 7 fixed on the side plate 4, a swing plate 702 rotatably mounted on the ear plate 7 via a pin 701, and a U-shaped bracket 703 mounted at the end of the swing plate 702. A torsion spring is provided on the pin 701 for driving the swing plate 702 to reset and rotate. The torsion spring provides a continuous upward reset torque for the swing plate 702, giving it a tendency to flip upward. A limiting mechanism is also provided on the side plate 4 to restrict the movement of the swing plate 702.

[0084] Furthermore, the limiting mechanism includes a limiting component for limiting the movement of the swing plate 702 and a triggering component for releasing the limiting component from limiting the swing plate 702;

[0085] The limiting assembly includes a fixed seat 8 fixed on the side plate 4, a movable groove 801 opened on the fixed seat 8, a limiting block 802 slidably connected in the movable groove 801, and a compression spring 803 disposed between the inner wall of the movable groove 801 and the limiting block 802. The end of the limiting block 802 away from the compression spring 803 is provided with a first force-bearing inclined surface 8021, and the top of the U-shaped bracket 703 is provided with a limiting groove 7031 that cooperates with the limiting block 802.

[0086] Furthermore, the triggering component includes a force-bearing block 9 that is slidably connected in the fixed seat 8 and moves against the limiting block 802, a force-bearing plate 901 fixed on the top of the force-bearing block 9, an arc-shaped plate 902 disposed on both sides of the force-bearing plate 901, and an elastic telescopic rod 903 disposed between the force-bearing plate 901 and the fixed seat 8.

[0087] The limiting block 802 is provided with a force groove 10 for the movement of the force block 9, and the inner wall of the force groove 10 is provided with a second force inclined surface 1001 that moves against the bottom of the force block 9.

[0088] Specifically, under normal circumstances, the cable body 202 is in a tensioned state, suspended above the force plate 901. At this time, the swing plate 702 is locked in the retracted position by the limiting block 802, and the entire lifting assembly is in a standby state. When the cable body 202 sags due to slack, it will directly press on the force plate 901. The arc plate 902 ensures that the cable body 202 stays in the effective working area, preventing the cable body 202 from slipping off the force plate 901. The weight of the cable body 202 is transmitted through the force plate 901, causing the force block 9 to press down. The telescopic rod 903 moves downward, and the bottom of the force block 9 contacts the second force inclined surface 1001 in the force groove 10, generating a horizontal component force. This force pushes the limiting block 802 to overcome the elastic force of the compression spring 803 and retract into the movable groove 801, thereby causing it to exit from the limiting groove 7031 of the U-shaped bracket 703. Once the limit is released, the swing plate 702, driven by the torsion spring on the pin 701, quickly flips upward, causing the U-shaped bracket 703 to rise and steadily lift the drooping cable section off the track surface, completing the protection action.

[0089] Its purely mechanical passive safety design ensures that when the cable body 202 sags, regardless of whether the electrical warning system is functioning properly (e.g., sensor failure or power outage), as long as the weight of the cable body 202 acts on the load-bearing plate 901, it can reliably trigger subsequent mechanical interlocking actions, ultimately lifting the slack cable body 202. This adds an extremely reliable "safety redundancy" to the entire cable clamping protection system, effectively preventing overall protection failure due to a single point of failure in the electrical system and greatly improving the safety of the equipment. Once triggered, the lifting action is very rapid under the drive of the torsion spring, raising the cable body 202 to a safe height in a very short time, minimizing the time the cable is exposed to the danger zone.

[0090] like Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in a preferred embodiment, based on the above method, the side plate 4 is further provided with a sleeve 11 fixed at the wire hole 401. The sleeve 11 is provided with a drum 111 that cooperates with the two sets of lifting components. Each drum 111 is provided with a pull rope 112 connected to the end of one side swing plate 702. The bottom of the side plate 4 is provided with a fixed pulley 113 for guiding the pull rope 112 through a connecting plate. A movable gear 114 is provided on the outside of the sleeve 11. The bottom of the crane bracket 1 is provided with a rack plate 12 that meshes with the movable gear 114 through a connecting plate.

[0091] Specifically, when the crane travels on the track and gradually approaches the area where the lifting component needs to be switched, i.e., at the intermediate anchor point 501, the rack plate 12 installed at the bottom of the crane bracket 1 also moves accordingly, gradually approaching the movable gear 114 on the side plate 4. When the crane travels to the predetermined position, the rack plate 12 and the movable gear 114 engage. As the crane continues to travel in a straight line, the fixed rack plate 12 will drive the movable gear 114 to rotate. The rotation of the movable gear 114 will drive the sleeve 11 and the two drums 111 fixed thereon to rotate together. Since the pull ropes 112 on the two drums 111 are wound in opposite directions, the rotation of the gear will cause one drum 111 to wind up the pull rope 112, while the other drum 111 will release the pull rope 112. The pull rope 112 should be made of corrosion-resistant and anti-aging steel wire rope.

[0092] For the side that needs to be reset, i.e. the side away from the crane: after the winding rope 112 is guided by the fixed pulley 113, it generates a force that pulls the end of the swing plate 702 downward. This force overcomes the torque of the torsion spring on the pin 701, causing the swing plate 702 and U-shaped bracket 703, which have been raised for protection, to rotate downward and return to the retracted position.

[0093] For the side that is about to enter the work area, that is, the side that the crane moves forward and approaches: release the pull rope 112 to release the restraint on the swing plate 702 on this side, so that its torsion spring is in standby state, ready to respond to possible cable sagging;

[0094] When the crane has completely passed through the area, the rack plate 12 disengages from the movable gear 114, and the transmission stops. At this time, the lifting component on the side that was previously in motion has been reset and relocked by the limit mechanism; the other side is in a relaxed standby state. The device has completed the automatic switching of working states and is ready to deal with potential risks in the next working area. It has achieved intelligent and unmanned reset. Traditional protection devices often require manual intervention to reset after activation, which seriously affects work efficiency. This device ensures that the protection device can work cyclically throughout the entire working cycle of the crane's reciprocating movement without the need for manual operation, which greatly ensures the continuity of production and the level of automation.

[0095] like Figure 1 and Figure 11 As shown, in a preferred embodiment, based on the above method, a guide plate 13 is further provided on the crane support 1, which is inclined to the crane traveling wheel 102. The distance between the guide plate 13 and the track body 5 is less than the diameter of the cable body 202. An arc-shaped anti-crossing plate 131 is provided on the top of the guide plate 13.

[0096] Specifically, when the crane is moving normally and the cable is reliably supported or under tension, the guide plate 13 moves synchronously with the crane, maintaining a constant small gap between its lower edge and the track surface. At this time, this component is inactive and in standby mode. In extreme cases, if a very small portion of the cable body 202 remains on the track surface due to incomplete support or unusual shape, as the crane continues to move forward, the inclined leading edge of the guide plate 13 will contact this section of cable before the crane's traveling wheels 102. Due to the thrust of the crane's forward movement, the inclined guide plate 13, like a shovel or plow, continuously pushes the stranded cable along its inclined surface outwards from the track, thus clearing it from the track before the crane's traveling wheels 102 crush it. During the sweeping process, the cable may attempt to "crawl" upwards along the inclined surface of the guide plate 13 due to its own elasticity or the sweeping force. At this time, the top arc-shaped anti-overrun plate 131 will block the upward path of the cable. The smooth arc-shaped surface guides the cable downwards or restricts it within the effective working area of ​​the guide plate 13, ensuring that it is eventually pushed to the side, effectively preventing the cable from "overrunning" the guide plate 13 and re-entering the crushing path of the crane traveling wheel 102. Even if the previous warning system and lifting components fail due to extreme conditions, this physical barrier can still work effectively, ensuring that the cable can be provided with the most basic protection under any circumstances, greatly improving the safety redundancy and fault tolerance of the entire system.

[0097] This invention also discloses a method for using a cable reel clamping prediction device for a track-mounted crane, which further includes the following steps:

[0098] S1: Normal walking and condition monitoring:

[0099] The crane travels on the track body 5, and the cable reel motor 201 drives the reel body 2 to wind up and unwind the cable body 202, keeping it taut. The guide tube 302 guides the cable body 202.

[0100] Sensor group 6 continuously monitors the position of guide tube 302. The control circuit determines that the cable body 202 is in normal condition based on the sensor signal, and the device does not interfere with the operation of the crane.

[0101] S2: Cable crush warning:

[0102] When the cable reel body 2 experiences abnormal cable winding and the cable body 202 becomes loose and droops, the guide tube 302 will shift due to the change in tension.

[0103] The control circuit detects that the signal of the left position sensor 601 or the right position sensor 602 is lost, and the slack sensor 603 detects that the cable body 202 has entered a slack state. Then it outputs a cable clamping warning signal. At this time, the system issues an early warning, indicating that the cable body 202 is at risk of being clamped.

[0104] S3: Mechanical protection activated.

[0105] At the same time, the drooping cable body 202 will naturally press on the force plate 901 of the same side support component. The arc plates 902 on both sides of the force plate 901 prevent the cable from slipping. After the force plate 901 is subjected to force, it compresses the elastic telescopic rod 903 and pushes the force block 9 at its bottom down. The bottom of the force block 9 interacts with the second force inclined surface 1001 in the force groove 10, generating a force that causes the limiting block 802 to retract into the fixed seat 8. The limiting block 802 squeezes the compression spring 803, causing it to exit from the limiting groove 7031 of the U-shaped bracket 703, thereby releasing the limitation on the swing plate 702.

[0106] Driven by the torsion spring on the pin 701, the swing plate 702 quickly flips upward and resets, causing the U-shaped bracket 703 at the end to rise, lifting the slack cable body 202 section into the air, separating it from the surface of the track body 5, thus fundamentally avoiding cable compression.

[0107] S4: Assisted Clearance and Obstacle Crossing Protection

[0108] In the forward direction of the crane traveling wheel 102, the gap between the lower edge of the inclined guide plate 13 and the track body 5 is smaller than the cable diameter. Even if a very small part of the cable is not fully lifted, the guide plate 13 can push the cable body 202 away from the track body 5 before the crane traveling wheel 102 arrives. The arc-shaped anti-crossing plate 131 at the top ensures that the cable body 202 will not cross the guide plate 13 when it is pushed, thus ensuring the cleaning effect.

[0109] S5: State Switching and Automatic Reset:

[0110] When the crane finishes dealing with the fault and continues to travel and pass through the intermediate anchor point 501, the rack plate 12 at the bottom of the crane bracket 1 will mesh with the movable gear 114 on the outside of the sleeve 11.

[0111] As the crane moves, the rack plate 12 drives the movable gear 114 and the sleeve 11 to rotate. The sleeve 11 drives the two drums 111 to rotate. One drum 111 winds up the pull rope 112, and the other drum 111 releases the pull rope 112.

[0112] After the winding pull rope 112 changes direction through the fixed pulley 113, it pulls the swing plate 702, which was flipped up due to the protection action, so that it overcomes the torsion spring force and rotates downward. During the downward rotation of the swing plate 702, the U-shaped bracket 703 will squeeze the first force-bearing inclined surface 8021 of the limiting block 802, so that the limiting block 802 temporarily retracts to avoid it. When the U-shaped bracket 703 at the end of the swing plate 702 rotates into place, the limiting groove 7031 on it is just aligned with the limiting block 802. Under the push of the compression spring 803, the limiting block 802 quickly inserts into the limiting groove 7031, and locks the swing plate 702 back into the standby position.

[0113] At this point, the lifting assembly on one side that was originally lifting has been reset, and the lifting assembly on the other side is ready to deal with any possible slack in the cable body 202 on that side because the swing plate 702 is no longer pulled by the pull rope 112.

[0114] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0115] The above description is only a preferred embodiment 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 of the technology 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 track-mounted crane cable reel clamping prediction device, comprising a reel body (2) fixed on a mounting beam (101) of a crane support (1), a track body (5) provided on the lower side of the crane support (1), and a cable reel motor (201) for driving the reel body (2) provided on the mounting beam (101), characterized in that, Also includes: Mounting plate (3), the mounting plate (3) is fixed on the lower side of the crane bracket (1), the mounting plate (3) is rotatably connected to the guide tube (302) via the rotating shaft (301), and the cable body (202) wound on the reel body (2) is slidably connected in the guide tube (302); Side plate (4), the side plate (4) is provided on one side of the track body (5), the side plate (4) is provided with a wire hole (401) for the cable body (202) to pass through, and the track body (5) is provided with an intermediate anchor point (501) on the side above the wire hole (401). And a sensor group (6), which is mounted on the mounting plate (3) to detect whether the guide tube (302) is located at the working position corresponding to the tension of the cable body (202), whether it passes through the intermediate anchor point (501), and whether it is in a state indicating that the cable body (202) is too tight; The sensor group (6) is electrically connected to a control circuit; The sensor group (6) includes: A left-side sensor (601) is used to detect that the guide tube (302) is in the left-side working position; The right-side sensor (602) is used to detect that the guide tube (302) is in the right-side working position; A slack sensor (603) is disposed between the left sensor (601) and the right sensor (602) to detect the slack state of the cable body (202); Intermediate anchor sensor (604) is used to detect when the crane passes through intermediate anchor point (501); The sensor group (6) also includes overtight sensors (605) disposed on the left and right sides of the mounting plate (3) for detecting the overtight state of the cable body (202). The mounting plate (3) is provided with tension springs (303) at each overtight sensor (605). The control circuit is electrically connected to the sensor group (6) via wires; When the sensor group (6) detects that the guide tube (302) passes through the intermediate anchor point (501), the locking of the previous working position is released; When the sensor group (6) detects that the cable body (202) is too tight, it outputs a crane stop control signal; When the guide tube (302) disengages from a locked working position and does not reach the intermediate anchor point (501), the sensor group (6) generates a corresponding signal change, and the control circuit outputs a cable pressure warning signal of the crane based on the corresponding signal change generated by the sensor group (6). The control circuit outputs a cable clamping warning signal for the crane, which is determined by the signal loss of the left position sensor (601) or the right position sensor (602) and the signal change of the relaxation sensor (603).

2. The cable reel clamping prediction device for a track-mounted crane according to claim 1, characterized in that, The side plate (4) is symmetrically provided with lifting components on both sides of the wire hole (401) for lifting the cable body (202) upward when it is in a relaxed state; The lifting assembly includes an ear plate (7) fixed on the side plate (4), a swing plate (702) rotatably mounted on the ear plate (7) via a pin (701), and a U-shaped bracket (703) mounted at the end of the swing plate (702). A torsion spring for driving the swing plate (702) to reset and rotate is provided on the pin (701), and a limiting mechanism for restricting the movement of the swing plate (702) is also provided on the side plate (4).

3. The cable reel clamping prediction device for a track-mounted crane according to claim 2, characterized in that, The limiting mechanism includes a limiting component for limiting the movement of the swing plate (702) and a triggering component for releasing the limiting component from limiting the swing plate (702); The limiting component includes a fixed seat (8) fixed on the side plate (4), a movable groove (801) opened on the fixed seat (8), a limiting block (802) slidably connected in the movable groove (801), and a compression spring (803) disposed between the inner wall of the movable groove (801) and the limiting block (802). The end of the limiting block (802) away from the compression spring (803) is provided with a first force-bearing inclined surface (8021), and the top of the U-shaped bracket (703) is provided with a limiting groove (7031) that cooperates with the limiting block (802).

4. The cable reel clamping prediction device for a track-mounted crane according to claim 3, characterized in that, The triggering component includes a force-bearing block (9) that is slidably connected in the fixed seat (8) and moves against the limiting block (802), a force-bearing plate (901) fixed on the top of the force-bearing block (9), an arc plate (902) on both sides of the force-bearing plate (901), and an elastic telescopic rod (903) between the force-bearing plate (901) and the fixed seat (8). The limiting block (802) is provided with a force groove (10) for the movement of the force block (9), and the inner wall of the force groove (10) is provided with a second force inclined surface (1001) that moves against the bottom of the force block (9).

5. The cable reel clamping prediction device for a track-mounted crane according to claim 4, characterized in that, The side plate (4) is fixed with a sleeve (11) at the wire hole (401). The sleeve (11) is provided with a drum (111) that cooperates with the two sets of lifting components. Each drum (111) is provided with a pull rope (112) that is connected to the end of one of the swing plates (702). The bottom of the side plate (4) is provided with a fixed pulley (113) for guiding the pull rope (112) through a connecting plate. A movable gear (114) is provided on the outside of the sleeve (11), and a rack plate (12) that meshes with the movable gear (114) is provided at the bottom of the crane bracket (1) through a connecting plate.

6. The cable reel clamping prediction device for a track-mounted crane according to claim 5, characterized in that, The crane support (1) is provided with a guide plate (13) that is inclined to the crane traveling wheel (102). The distance between the guide plate (13) and the track body (5) is less than the diameter of the cable body (202). An arc-shaped anti-crossing plate (131) is provided on the top of the guide plate (13).

7. A method of using the cable reel clamping prediction device for a track-mounted crane according to claim 6, characterized in that, It also includes the following steps: S1: Normal walking and condition monitoring: The crane travels on the track body (5), and the cable reel motor (201) drives the reel body (2) to reel in and unload the cable body (202) while maintaining tension. The guide tube (302) guides the cable body (202). The sensor group (6) continuously monitors the position of the guide tube (302). The control circuit determines that the cable body (202) is in normal condition based on the sensor signal, and the device does not interfere with the operation of the crane. S2: Cable crush warning: When the reel body (2) has an abnormal cable winding, and the cable body (202) becomes loose and droops, the guide tube (302) will be displaced due to the change in tension. The control circuit detects that the signal of the left position sensor (601) or the right position sensor (602) is lost, and the relaxation sensor (603) detects that the cable body (202) has entered a relaxed state. Then it outputs a cable clamping warning signal. At this time, the system gives an early warning, indicating that the cable body (202) is at risk of cable clamping. S3: Mechanical protection activated. At the same time, the drooping cable body (202) will naturally press on the force plate (901) of the same side support assembly. The arc plates (902) on both sides of the force plate (901) prevent the cable from slipping. After the force plate (901) is subjected to force, it compresses the elastic telescopic rod (903) and pushes the force block (9) at its bottom down. The bottom of the force block (9) interacts with the second force inclined surface (1001) in the force groove (10) to generate a force that causes the limiting block (802) to retract into the fixed seat (8). The limiting block (802) squeezes the compression spring (803) and causes it to exit from the limiting groove (7031) of the U-shaped bracket (703), thereby releasing the limitation on the swing plate (702). Driven by the torsion spring on the pin (701), the swing plate (702) quickly flips upward and resets, causing the U-shaped bracket (703) at the end to rise, lifting the slack cable body (202) section into the air, separating it from the surface of the track body (5), thus fundamentally avoiding cable compression. S4: Assisted Clearance and Obstacle Crossing Protection In the forward direction of the crane traveling wheel (102), the gap between the lower edge of the inclined guide plate (13) and the track body (5) is smaller than the cable diameter. Even if a very small part of the cable is not fully lifted, the guide plate (13) can push the cable body (202) away from the track body (5) before the crane traveling wheel (102) arrives. The arc-shaped anti-crossing plate (131) at the top ensures that the cable body (202) will not cross the guide plate (13) when it is pushed, thus ensuring the cleaning effect. S5: State Switching and Automatic Reset: When the crane finishes dealing with the fault and continues to travel and pass through the intermediate anchor point (501), the rack plate (12) at the bottom of the crane bracket (1) will mesh with the movable gear (114) on the outside of the sleeve (11); As the crane moves, the rack plate (12) drives the movable gear (114) and the sleeve (11) to rotate. The sleeve (11) drives the two drums (111) to rotate. One drum (111) winds up the rope (112), and the other drum (111) releases the rope (112). After the winding pull rope (112) changes direction through the fixed pulley (113), it pulls the swing plate (702) that was flipped up due to the protective action, so that it overcomes the torsion spring force and rotates downward. During the downward rotation of the swing plate (702), the U-shaped bracket (703) will squeeze the first force inclined surface (8021) of the limiting block (802), so that the limiting block (802) temporarily retracts to avoid it. When the U-shaped bracket (703) at the end of the swing plate (702) rotates into place, the limiting groove (7031) on it is just aligned with the limiting block (802). The limiting block (802) is pushed by the compression spring (803) and quickly inserts into the limiting groove (7031), locking the swing plate (702) back into the standby position. At this point, the lifting component on one side that was originally lifting has been reset, and the lifting component on the other side is ready to deal with the possible slack of the cable body (202) on the same side because the swing plate (702) is no longer pulled by the pull rope (112).

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