Portal crane high-voltage cable protection device based on incremental encoder

Abstract

The utility model relates to the technical field of cable drums, and provides a portal crane high-voltage cable protection device based on an incremental encoder, which comprises a slip ring box arranged on a base. The winding drum frame is rotationally arranged on the slip ring box and is used for winding a high-voltage cable; the speed measuring device is arranged on the base, located on one side of the sliding ring box and used for detecting the rotating speed of the winding drum frame. According to the technical scheme, the problem that a cable protection device in the prior art cannot deal with faults of a driving device and a cable drum is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable drum technical field, specifically, relate to a door machine high voltage cable protection device based on incremental encoder. BACKGROUND

[0002] The door machine of the portal crane is a kind of hoisting and transporting equipment, with the advantages of strong work capacity and high mobility, and is widely used in port and freight yard.The door machine can be driven by trolley traveling mechanism to move along the track laid in the front of wharf.The power supply of portal crane is mostly taken from high-voltage ground well of roadbed, and is sent into the door machine through high-voltage cable.When the door machine moves along the track, the high-voltage cable is wound on the reel and is retracted and released with the movement of the door machine.The high-voltage cable is expensive, and it takes a long time to replace and install, which seriously affects production.The voltage of the internal conductor is as high as 10,000 volts when power is on, and the consequences are serious if electric shock accident occurs.So the protection of the door machine high-voltage cable is particularly important.The original high-voltage cable protection device of the door machine is not ideal.When the door machine travels along the track, the cable winding motor bearing is stuck, or reaches the cable releasing limit position, and the high-voltage cable is pulled off.

[0003] The high-voltage cable protection device in the prior art usually adopts a hysteresis type driving device, which can realize the constant-speed winding of the cable and provide tensioning force by controlling the rotation of the cable reel according to the rotation speed and direction of the door machine driving device when the door machine travels along the track.However, in actual use, once the cable reel and the hysteresis type driving device fail, the cable reel cannot be rotated adaptively, resulting in damage to the cable. UTILITY MODEL CONTENTS

[0004] The utility model provides a door machine high-voltage cable protection device based on incremental encoder, solves the problem that the cable protection device in the related art cannot cope with the failure of the driving device and the cable reel.

[0005] The technical scheme of the utility model is as follows:

[0006] A door machine high-voltage cable protection device based on incremental encoder, comprising:

[0007] a base;

[0008] a slip ring box arranged on the base;

[0009] a reel holder rotatably arranged on the slip ring box, the reel holder being used for winding high-voltage cable;

[0010] a speed measuring device arranged on the base, the speed measuring device being located on one side of the slip ring box, and the speed measuring device being used for detecting the rotation speed of the reel holder.

[0011] Optionally, the speed measuring device comprises:

[0012] An encoder is arranged on the base;

[0013] A first rotating shaft is rotatably arranged on the encoder, the encoder is used to detect the rotating speed of the first rotating shaft, and the first rotating shaft is in driving connection with the reel stand.

[0014] Optionally, it further comprises:

[0015] Two first sprockets are arranged on the reel stand and the first rotating shaft respectively, and the two first sprockets are in chain transmission.

[0016] Optionally, it further comprises:

[0017] A hysteresis drive device is arranged on the base, the hysteresis drive device is located on one side of the slip ring box, and the hysteresis drive device is in chain transmission with the reel stand.

[0018] Optionally, the reel stand further comprises:

[0019] A second rotating shaft is rotatably arranged on the slip ring box, and the second rotating shaft has a cable through hole in the middle;

[0020] Two annular rings are arranged on the first rotating shaft, the two annular rings are distributed along the axis of the first rotating shaft, a limiting space is formed between the two annular rings, the high-voltage cable is located in the limiting space, and a plurality of connecting rods are arranged between the annular rings and the second rotating shaft.

[0021] Optionally, it further comprises:

[0022] A vortex sheet is arranged between the two annular rings respectively at two ends, and the vortex sheet is used to support the high-voltage cable.

[0023] Optionally, it further comprises:

[0024] A base is arranged on the base and located on one side of the reel stand;

[0025] A first lifting block is arranged on the base in a lifting manner;

[0026] A first roller is rotatably arranged on the first lifting block;

[0027] A second roller is rotatably arranged on the base, the first lifting block is close to or away from the second roller after lifting, the second roller is farther away from the reel stand than the first roller, and the cable on the reel stand is wound through the first roller and the second roller in sequence;

[0028] A first elastic member is arranged at both ends of the first lifting block and the base, and is used to provide a force for the first lifting block to move away from the second roller.

[0029] Optionally, the base is provided with a sliding groove, the first lifting block is arranged in the sliding groove, the elastic force provided by the first elastic member is greater than the tension force provided by the magnetic hysteresis driving device, and the utility model further comprises:

[0030] A cover is detachably arranged on the base, one end of the first elastic member is arranged on the base through the cover;

[0031] A pressure sensor is arranged on one side of the cover close to the first lifting block, and is used to sense the position of the first lifting block.

[0032] The working principle and beneficial effects of the utility model are as follows:

[0033] 1. In the utility model, the incremental encoder is used as a speed measuring device, high-precision speed measurement can be provided, and abnormal changes in the rotating speed of the drum frame can be found in time. Through real-time monitoring of the rotating speed of the drum frame, it can be quickly judged whether the driving device or the cable drum is faulty, so that corresponding protection measures can be taken, and the damage of the high-voltage cable can be effectively avoided.

[0034] 2. Under normal working conditions, the relationship between the rotating speed of the drum frame and the position of the portal driving device should be kept at a stable ratio, but once the rotating speed of the drum frame and the position of the portal have a large deviation, it indicates that the position of the drum frame may be faulty, and an alarm signal needs to be sent and the device needs to be stopped urgently to avoid the high-voltage cable being pulled off.

[0035] 3. The design improves the reliability and stability of the cable protection device, reduces the production interruption and safety risk caused by cable failure, reduces the maintenance and replacement cost of the high-voltage cable, and improves the overall operation efficiency and economic benefit of the portal crane. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above-mentioned characteristics, technical features, advantages and implementation modes of the utility model will be further described in the following preferred embodiments in a clear and easy-to-understand manner combined with the drawings.

[0037] Fig. 1 It is a structural schematic view of the utility model;

[0038] Fig. 2 It is a front view of the utility model;

[0039] Fig. 3 It is another angle structural schematic view of the utility model.

[0040] In the figure: 100, base, 200, slip ring box, 300, reel stand, 400, speed measuring device, 410, encoder, 420, first rotating shaft, 500, first sprocket, 600, hysteresis drive device, 310, second rotating shaft, 320, cable through hole, 330, circular ring, 340, limiting space, 700, spiral sheet, 810, base, 820, first lifting block, 830, first roller, 840, second roller, 850, first elastic member, 811, sliding groove, 860, cover, 870, pressure sensor. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0042] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0043] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] Reference Figs. 1-3The utility model provides a kind of door machine high voltage cable protection device based on incremental encoder, including slip ring box 200, slip ring box 200 is set on base 100;Drum frame 300 rotation is set on slip ring box 200, and drum frame 300 is used to wind high voltage cable;Speed measuring device 400 is set on base 100, and speed measuring device 400 is located slip ring box 200 side, and speed measuring device 400 is used to detect the rotating speed of drum frame 300.

[0046] In the embodiment, the slip ring box 200 is made of a material with good conductivity and sealing property, and is stably arranged on the base 100 by means of fastening bolts or the like. The drum frame 300 is installed on the slip ring box 200 by means of high-precision bearings, so as to ensure smooth rotation thereof. The speed measuring device 400 can be an incremental encoder 410, which is fixed on the base 100 by means of a bracket and is located close to one side of the slip ring box 200. The measurement shaft of the incremental encoder 410 is connected to the rotating shaft of the drum frame 300 by means of a transmission structure, so as to accurately detect the rotating speed of the drum frame 300. When the door machine is in operation, the drum frame 300 rotates to wind or release the high-voltage cable along with the movement of the door machine, and the speed measuring device 400 detects the rotating speed of the drum frame 300 in real time and transmits the rotating speed data to the subsequent control and processing system.

[0047] The incremental encoder 410 is used as the speed measuring device 400, which can provide high-precision rotating speed measurement and timely detect abnormal changes in the rotating speed of the drum frame 300. Through real-time monitoring of the rotating speed of the drum frame 300, it can be rapidly judged whether a fault occurs in the driving device or the cable drum, so that corresponding protection measures can be taken to effectively avoid damage to the high-voltage cable. Under normal working conditions, the relationship between the rotating speed of the drum frame 300 and the position of the gantry driving device should be maintained at a stable ratio, but once there is a large deviation in the relationship between the rotating speed of the drum frame 300 and the position of the gantry, it indicates that the position of the drum frame 300 may be faulty, and an alarm signal needs to be sent and the device needs to be stopped urgently to avoid the high-voltage cable being pulled off. This design improves the reliability and stability of the cable protection device, reduces the production interruption and safety risk caused by cable failure, reduces the maintenance and replacement cost of the high-voltage cable, and improves the overall operation efficiency and economic benefit of the door machine.

[0048] Further, the speed measuring device 400 includes an encoder 410, which is arranged on the base 100; a first rotating shaft 420 is rotationally arranged on the encoder 410, and the encoder 410 is used to detect the rotating speed of the first rotating shaft 420, and the first rotating shaft 420 is in driving connection with the drum frame 300.

[0049] In the embodiment, the encoder 410 is fixed on the base 100 by a bolt or a mounting seat, and is of high precision and fast response. The first rotating shaft 420 is mounted on the encoder 410 through a bearing to ensure flexible rotation. The first rotating shaft 420 is connected to the reel stand 300 by a belt drive, a chain drive or a gear drive. For example, a belt pulley (or a sprocket or a gear) is mounted on the rotating shaft of the reel stand 300, and a corresponding belt pulley (or sprocket or gear) is mounted on the first rotating shaft 420, and then the belt (or chain or gear) is used for transmission. When the reel stand 300 rotates, the first rotating shaft 420 is driven to rotate synchronously through the transmission structure, and the encoder 410 detects the rotating speed of the first rotating shaft 420 in real time, thereby indirectly obtaining the rotating speed information of the reel stand 300.

[0050] It should be further explained that, due to the connection of the reel stand 300 and the pulley sleeve, the transmission connection between the first rotating shaft 420 and the reel stand 300 by the belt drive, the chain drive or the gear drive can avoid the pulley sleeve and facilitate installation.

[0051] Further, the first sprocket 500 is provided with two first sprockets 500, which are arranged on the reel stand 300 and the first rotating shaft 420 respectively, and the two first sprockets 500 are chain driven.

[0052] In the embodiment, the two first sprockets 500 are stably mounted on the reel stand 300 and the first rotating shaft 420 by key connection or welding.

[0053] The chain is arranged on the two first sprockets 500 to ensure that the chain is moderately tensioned to achieve effective chain transmission. In operation, the rotation of the reel stand 300 drives the first sprocket 500 on the reel stand 300 to rotate, and the first sprocket 500 on the first rotating shaft 420 is synchronously rotated through the transmission of the chain.

[0054] The chain transmission mode is accurate in transmission and can work in harsh environments to adapt to the complex conditions of the door machine working site. The first sprocket 500 is simple in structure, easy to manufacture and install, and relatively low in cost.

[0055] Further, the hysteresis drive device 600 is arranged on the base 100, and the hysteresis drive device 600 is located on one side of the slip ring box 200 and is chain driven with the reel stand 300.

[0056] In this embodiment, the hysteresis drive device 600 is firmly arranged on the base 100 by means of bolt fastening or welding, and is located on one side of the slip ring box 200. Chain wheels are respectively arranged on the output shaft of the hysteresis drive device 600 and the corresponding position of the drum frame 300. The chain is sleeved on the two chain wheels to form a chain transmission connection. During the operation of the door machine, the hysteresis drive device 600 works to drive the drum frame 300 to rotate through chain transmission, thereby realizing the winding and unwinding of the high-voltage cable.

[0057] The hysteresis drive device 600 not only provides stable rotating speed when the drum frame 300 winds, but also provides stable tension when the drum frame 300 unwinds, thereby avoiding the scattering of the high-voltage cable.

[0058] Further, the drum frame 300 further comprises a second rotating shaft 310, which is rotatably arranged on the slip ring box 200 and has a cable through hole 320 in the middle. There are two circular rings 330, which are arranged on the first rotating shaft 420 and are spaced apart along the axis of the first rotating shaft 420. The two circular rings 330 form a limiting space 340 therebetween, and the high-voltage cable is located in the limiting space 340. There are a plurality of connecting rods between the circular ring 330 and the second rotating shaft 310.

[0059] In this embodiment, the second rotating shaft 310 is installed on the slip ring box 200 through high-precision bearings to ensure its smooth rotation. The two circular rings 330 are fixed on the second rotating shaft 310 by welding, bolt connection or the like, and are spaced apart along the axis, thereby forming the limiting space 340 for limiting the position of the high-voltage cable. A plurality of connecting rods are uniformly distributed between the circular ring 330 and the second rotating shaft 310, and the two ends of the connecting rods are firmly connected with the circular ring 330 and the second rotating shaft 310, respectively. The high-voltage cable passes through the cable through hole 320 in the middle of the second rotating shaft 310 and is limited in the limiting space 340 formed by the two circular rings 330. When the drum frame 300 rotates, the second rotating shaft 310 drives the circular ring 330 and the connecting rod to rotate together, thereby realizing the winding and unwinding of the high-voltage cable, and ensuring the orderly arrangement of the cable through the limiting space 340.

[0060] The design of the second rotating shaft 310 and the circular ring 330 can effectively limit and guide the high-voltage cable, thereby avoiding the disorder and winding of the cable during winding and unwinding. The connecting rod enhances the structural stability between the circular ring 330 and the second rotating shaft 310, thereby ensuring the stability of the limiting space 340 during long-term use. The cable through hole 320 is communicated with the slip ring box 200, thereby facilitating the passing of the high-voltage cable. The cooperation of the cable through hole 320 and the limiting space 340 makes the winding and unwinding of the high-voltage cable more orderly, thereby improving the service life and safety of the cable. The two circular rings 330 are connected through the connecting rod and the second rotating shaft 310. The connecting rod not only provides support for the circular ring 330, but also helps to reduce the weight of the circular ring 330.

[0061] Further, the vortex sheet 700 is arranged between the two annular rings 330 at both ends, and the vortex sheet 700 is used to support the high-voltage cable.

[0062] In this embodiment, the two ends of the vortex sheet 700 are fixed between the two annular rings 330 by welding or fastening bolts and the like. The vortex sheet 700 is distributed in a spiral shape and is tightly connected to the inner side of the annular ring 330. In the case where there is a support rod between the annular ring 330 and the second rotating shaft 310, the two ends of the vortex sheet 700 are fixed on the support rods of the two annular rings 330 by welding or fastening bolts.

[0063] In operation, after the high-voltage cable passes out of the cable through hole 320, it is first placed on the vortex sheet 700, and then wound layer by layer. The vortex sheet 700 has at least one turn, and the end of the high-voltage cable closest to the second rotating shaft 310 can be fixed by a wire, a rope or the like. This can prevent the high-voltage cable from slipping when the drum frame 300 rotates.

[0064] The arrangement of the vortex sheet 700 not only increases the support points for the high-voltage cable, but also makes the stress more uniform and reduces damage to the cable caused by excessive local pressure. Moreover, the high-voltage cable in the direction of the second rotating shaft 310 is guided to provide a smooth transition in the direction of winding around the second rotating shaft 310.

[0065] Further, the base 810 is arranged on the base 100 and located on one side of the drum frame 300; the first lifting block 820 is arranged on the base 810 in a lifting manner; the first roller 830 is arranged on the first lifting block 820 in a rotating manner; the second roller 840 is arranged on the base 810 in a rotating manner, and the first lifting block 820 is arranged to move closer to or away from the second roller 840 after lifting. The second roller 840 is farther away from the drum frame 300 than the first roller 830, and the cable on the drum frame 300 is wound through the first roller 830 and the second roller 840 in turn; the first elastic member 850 is arranged at both ends of the first lifting block 820 and the base 810, and the first elastic member 850 is used to provide a force for the first lifting block 820 to move away from the second roller 840.

[0066] In this embodiment, the base 810 is fixed on the base 100 by welding or bolt connection, etc., and is located on one side of the reel stand 300. The first lifting block 820 is capable of lifting movement on the base 810 through guide rails or guide columns, etc. The first roller 830 is mounted on the first lifting block 820 through bearings and is capable of free rotation. The second roller 840 is also mounted on the base 810 through bearings and is located farther away from the reel stand 300 than the first roller 830. The first elastic member 850 can be a spring, one end of which is connected to the first lifting block 820 and the other end of which is connected to the base 810. When the cable on the reel stand 300 is wound through the first roller 830 and the second roller 840 in turn, the first lifting block 820 can automatically adjust the position according to the tension of the cable under the action of the first elastic member 850, so as to maintain the appropriate tension of the cable.

[0067] The cooperation of the first lifting block 820 and the first elastic member 850 can automatically adjust the tension of the cable, avoiding damage to the cable caused by excessive or insufficient tension. The arrangement of the first roller 830 and the second roller 840 provides guidance and support for the cable, ensuring the stability of the cable winding and unwinding process. This structure helps to improve the service life of the cable and reduce the occurrence of cable failure.

[0068] Further, the base 810 has a sliding groove 811, the first lifting block 820 is arranged in the sliding groove 811, the elastic force provided by the first elastic member 850 is greater than the tension provided by the magnetic hysteresis type driving device 600, and further comprising: a cover 860 detachably arranged on the base 810, one end of the first elastic member 850 is arranged on the base 810 through the cover 860; a pressure sensor 870 is arranged on one side of the cover 860 close to the first lifting block 820, and the pressure sensor 870 is used to sense the position of the first lifting block 820.

[0069] In this embodiment, the first lifting block is arranged on the base 810 through the sliding groove 811, one end of the sliding groove 811 penetrates through the top of the base 810, facilitating the installation of the first lifting block 820. The cover 860 is detachably mounted on the base 810 by bolts, etc., which not only facilitates the installation and removal of the first lifting block 820, but also provides support force for the first elastic member 850, so that the first elastic member 850 can provide the force for the first lifting block 820 to descend. The first elastic member 850 selects a spring with relatively large elastic force, one end of which abuts against the cover 860 and the other end of which acts on the first lifting block 820, and the elastic force provided by the first elastic member 850 is greater than the tension provided by the magnetic hysteresis type driving device 600. The pressure sensor 870 is fixed on one side of the cover 860 close to the first lifting block 820 through a mounting seat or pasting, etc.

[0070] In the working process, if a sudden situation occurs in the point reel frame 300 or the hysteresis type driving device 600, the tension of the high-voltage cable instantaneously increases, and the first lifting block 820 can be lifted to compress the first elastic member 850 to prevent the high-voltage cable from being pulled off. Time is provided for the overall system to respond to the emergency. Moreover, after the high-voltage cable on the reel frame 300 is completely discharged, the tension of the high-voltage cable between the reel frame 300 and the portal frame instantaneously increases, and at this time, the first lifting block 820 can be lifted to compress the first elastic member 850 to prevent the high-voltage cable from being pulled off. When the first lifting block 820 is lifted to the position of touching the pressure sensor, the system can avoid the occurrence of an accident by controlling the portal frame to stop suddenly.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A portal high voltage cable protection device based on an incremental encoder, characterized by, The utility model relates to a high voltage cable winding device, including: Base (100); Slip ring box (200) is arranged on base (100); Drum frame (300) is rotationally arranged on slip ring box (200), and drum frame (300) is used to wind high voltage cable; Speed measuring device (400) is arranged on base (100), and speed measuring device (400) is located on one side of slip ring box (200), and speed measuring device (400) is used to detect the rotating speed of drum frame (300); Hysteresis drive device (600) is arranged on base (100), and hysteresis drive device (600) is located on one side of slip ring box (200), and hysteresis drive device (600) is chain transmission with drum frame (300); Speed measuring device (400) includes: Encoder (410) is arranged on base (100); First rotating shaft (420) is rotationally arranged on encoder (410), and encoder (410) is used to detect the rotating speed of first rotating shaft (420), and first rotating shaft (420) is transmission connection with drum frame (300).

2. The portal high voltage cable protection device based on incremental encoder according to claim 1, characterized in that, Still include: First sprocket (500) has two, and two first sprockets (500) are chain transmission respectively on drum frame (300) and first rotating shaft (420).

3. The portal high voltage cable protection device based on incremental encoder according to claim 1, characterized in that, Drum frame (300) further includes: Second rotating shaft (310) is rotationally arranged on slip ring box (200), and second rotating shaft (310) has cable through hole (320) in the middle; Two annular rings (330) are arranged on first rotating shaft (420), and two annular rings (330) are spaced apart along the axis of first rotating shaft (420), and the limiting space (340) is formed between two annular rings (330), and high voltage cable is located in limiting space (340), and a plurality of connecting rods are arranged between annular ring (330) and second rotating shaft (310).

4. The portal high voltage cable protection device based on incremental encoder of claim 3, wherein, Still include: Vortex sheet (700) is arranged between two annular rings (330) respectively at two ends, and vortex sheet (700) is used to support high voltage cable.

5. The portal high voltage cable protection device based on incremental encoder of claim 1, wherein, Still include: Base (810) is arranged on base (100) and located on one side of drum frame (300); First lifting block (820) is arranged on base (810); First roller (830) is rotationally arranged on first lifting block (820); Second roller (840) is rotationally arranged on base (810), and first lifting block (820) is close to or away from second roller (840) after lifting, and second roller (840) is farther away from drum frame (300) than first roller (830), and the cable on drum frame (300) is sequentially arranged through first roller (830) and second roller (840). A first elastic member (850) is arranged at both ends of the first lifting block (820) and the base (810), and is used to provide a force for the first lifting block (820) to move away from the second roller (840).

6. A portal high voltage cable protection device based on incremental encoder according to claim 5, characterized in that, The base (810) is provided with a sliding groove (811), the first lifting block (820) is arranged in the sliding groove (811), the elastic force provided by the first elastic member (850) is greater than the tension force provided by the magnetic hysteresis driving device (600), and the base (810) further comprises: A cover (860) is detachably arranged on the base (810), one end of the first elastic member (850) is arranged on the base (810) through the cover (860); A pressure sensor (870) is arranged on one side of the cover (860) close to the first lifting block (820), and the pressure sensor (870) is used to sense the position of the first lifting block (820).

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