Rope looseness detection device for pitching steel wire rope of ship loader

Abstract

The utility model relates to the technical field of steel wire rope looseness detection, and discloses a ship loader pitching steel wire rope looseness detection device which comprises a detection component, a limiting support is installed on one side of a baffle, a proximity switch is installed at the top end of the limiting support, and when a steel wire rope loosens, the friction force between the steel wire rope and a fixed pulley drives the fixed pulley to rotate. The balance plate rotates, the balance plate drives the baffle to be lifted upwards, the proximity switch induces signal loss, and therefore a stop signal is given out, an action instruction of the pitching mechanism is cut off in time, and meanwhile a brake contracting command of a brake of the pitching mechanism is triggered, emergency braking stopping is conducted, and the weight of the top end of the U-shaped bearing plate changes. The data is transmitted to a terminal through a strain type weighing sensor, an amplifier, an analog-to-digital converter and a wireless communication module, when the weight change is too large, the steel wire rope is loosened, when the weight change is small, the steel wire rope shakes due to external factors, and the looseness of the steel wire rope is subjected to dual detection.

Description

Technical Field

[0001] This utility model relates to the field of wire rope slack detection technology, specifically a device for detecting slack in the pitching wire rope of a ship loader. Background Technology

[0002] A wire rope is a type of rope formed by twisting multiple steel wires together. It is typically used to bear heavy loads and provide tension. Wire ropes are widely used in mining hoists, bridge cables, and lifting machinery due to their high strength and abrasion resistance.

[0003] Existing wire ropes, due to their long-term exposure to complex loads and harsh working environments, are prone to damage such as wear, broken wires, and corrosion. When a wire rope breaks, it becomes slack. Traditional methods for detecting slack in wire ropes rely primarily on manual visual inspection, which is inefficient and fails to promptly identify slack, hindering timely handling of emergencies. With technological advancements, non-destructive testing (NDT) techniques are increasingly being applied to wire rope inspection. Common NDT methods include electromagnetic testing and ultrasonic testing. Electromagnetic testing assesses damage by detecting changes in the wire rope's magnetic field, offering high detection speed but limited sensitivity to minor, localized damage. Ultrasonic testing can detect internal defects in wire ropes, but it is complex to operate, requires highly skilled personnel, and necessitates sophisticated techniques and costly equipment.

[0004] Therefore, we propose a device for detecting slack in the pitching wire rope of a ship loader to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a device for detecting slack in the pitching wire rope of a ship loader, in order to solve the problem mentioned in the background art that the use of ultrasonic testing to detect internal defects in wire ropes is technically complex and costly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for detecting slack in the pitching wire rope of a ship loader, comprising a detection component, the detection component comprising a connecting bearing and balance plates fixedly installed on both sides of the connecting bearing, support rods at both ends of the connecting bearing, a support base installed at the bottom end of the support rods, a circular threaded counterweight hole penetrating through the middle of the two sets of balance plates, a pulley connecting rod threadedly connected between the two sets of balance plates and on one side of the connecting bearing, a fixed pulley connected at the middle end of the pulley connecting rod, an adjustable counterweight threadedly installed on the outer side of the two sets of balance plates and on the side away from the pulley connecting rod, a baffle installed on the outer side of the balance plate, the baffle being at the lower end of the adjustable counterweight, a transmission component installed on the outer side of one set of support rods, a monitoring component installed at the middle end of the connecting bearing, a wire rope provided at the upper end of the fixed pulley, a pitching boom installed at one end of the wire rope and on one side of the pulley connecting rod, and a winch installed at the other end of the wire rope;

[0007] A limit bracket is installed on one side of the baffle, and a proximity switch is installed on the top of the limit bracket.

[0008] Preferably, the monitoring component includes a mounting base and positioning plates mounted on both sides of the top of the mounting base. The outer wall of the positioning plate is provided with a limiting groove. An I-shaped crossbar is movably installed between the two sets of positioning plates and inside the limiting groove. A support spring is installed at the bottom of the inner side of the limiting groove. The top of the support spring is installed at the bottom of the I-shaped crossbar. A limiting wheel is installed at the middle end of the I-shaped crossbar.

[0009] Preferably, a gasket is installed at the top of the mounting base, a U-shaped support plate is installed at the top of the gasket, and a strain gauge load cell is installed at the middle of the mounting base and below the U-shaped support plate.

[0010] Preferably, the transmission component includes a mounting box and a bottom rotating plate movably mounted inside the bottom of the mounting box. An inner bracket is installed inside the bottom rotating plate, and an amplifier, an analog-to-digital converter, and a wireless communication module are mounted on the top of the inner bracket.

[0011] Preferably, the amplifier, analog-to-digital converter, and wireless communication module are electrically connected, and the amplifier is electrically connected to the strain gauge load cell.

[0012] Preferably, the outer surface of the mounting box and the upper end of one side of the inner bracket are provided with a ventilation groove, and a dustproof net is installed inside the ventilation groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The present invention discloses a device for detecting slack in the pitching wire rope of a ship loader. When the wire rope becomes slack, the friction between the wire rope and the fixed pulley causes the fixed pulley to rotate, the balance plate to rotate, and the balance plate causes the baffle to lift upward. The proximity switch loses its sensing signal, thereby giving a stop signal, cutting off the action command of the pitching mechanism in time, and triggering the brake command of the pitching mechanism to brake and stop the machine in an emergency.

[0015] 2. The present invention discloses a device for detecting slack in the pitching wire rope of a ship loader. When the weight at the top of the U-shaped bearing plate changes, the data is transmitted to the terminal through a strain gauge load cell, an amplifier, an analog-to-digital converter, and a wireless communication module. When the weight change is too large, it can be known that the wire rope is slack. When the weight change is small, it can be known that the wire rope is shaking due to external factors. The device performs dual detection of wire rope slack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the detection component of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the monitoring component of this utility model;

[0019] Figure 4 This is a schematic diagram of the transmission component structure of this utility model.

[0020] In the diagram: 1. Winch; 2. Pitch boom; 3. Limit bracket; 31. Proximity switch; 4. Wire rope; 5. Detection component; 51. Balance plate; 52. Circular threaded counterweight hole; 53. Connecting bearing; 54. Support rod; 55. Support base; 56. Pulley connecting rod; 57. Fixed pulley; 58. Baffle; 59. Adjustable counterweight; 6. Monitoring component; 61. Positioning plate; 611. Limiting groove; 612. Support spring; 62. Mounting base; 63. I-shaped crossbar; 64. Limiting wheel; 65. Strain gauge load cell; 66. Gasket; 67. U-shaped bearing plate; 7. Transmission component; 71. Mounting box; 72. Bottom rotating plate; 73. Inner bracket; 74. Amplifier; 75. Analog-to-digital converter; 76. Wireless communication module; 77. Ventilation groove; 78. Dustproof net. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1 and Figure 2A device for detecting slack in the pitching wire rope of a ship loader includes a detection component 5. The detection component 5 includes a connecting bearing 53 and balance plates 51 fixedly installed on both sides of the connecting bearing 53. Support rods 54 are located at both ends of the connecting bearing 53, and a support base 55 is installed at the bottom end of each support rod 54. A circular threaded counterweight hole 52 is provided through the middle of the two sets of balance plates 51. A pulley connecting rod 56 is threaded between the two sets of balance plates 51 and on one side of the connecting bearing 53. A fixed pulley is connected to the middle of the pulley connecting rod 56. An adjustable counterweight 59 is threadedly installed on the outer side of the two sets of balance plates 51, away from the pulley connecting rod 56. A baffle 58 is installed on the outer side of the balance plate 51, and the baffle 58 is located at the lower end of the adjustable counterweight 59. A transmission component 7 is installed on the outer side of one set of support rods 54. A monitoring component 6 is installed at the middle end of the connecting bearing 53. A wire rope 4 is provided at the upper end of the fixed pulley 57. A pitching boom 2 is installed at one end of the wire rope 4, which is located on the side of the pulley connecting rod 56. A winch 1 is installed at the other end of the wire rope 4.

[0023] A limit bracket 3 is installed on one side of the baffle 58, and a proximity switch 31 is installed on the top of the limit bracket 3. The proximity switch 31 is of model Ni15-M30-RZ3X. The proximity switch 31 is a sensor that uses the change in electrical signal generated when an object approaches to realize switch control. It can sense the approach or presence of an object and open or close the circuit according to the detected change, thereby achieving the purpose of control.

[0024] In this embodiment: the wire rope 4 passes through the fixed pulley 57. When the wire rope 4 becomes loose, the friction between the wire rope 4 and the fixed pulley 57 causes the fixed pulley 57 to rotate. At this time, under the combined action of the weight of the wire rope 4 and the centripetal force generated by the rotation of the fixed pulley 57, the entire pulley connecting rod 56 is subjected to downward force. At the same time, it drives the balance plate 51 to rotate. The balance plate 51 drives the baffle 58 to lift upward. The proximity switch 31 loses its sensing signal, thereby giving a stop signal, cutting off the action command of the pitch mechanism in time, and triggering the brake command of the pitch mechanism to brake and stop the machine in an emergency, avoiding equipment damage accidents.

[0025] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 2-4The monitoring component 6 includes a mounting base 62 and positioning plates 61 mounted on both sides of the top of the mounting base 62. The outer wall of the positioning plate 61 has a limiting groove 611. An I-shaped crossbar 63 is movably installed between the two sets of positioning plates 61 and inside the limiting groove 611. A support spring 612 is installed at the bottom of the inside of the limiting groove 611. The top of the support spring 612 is installed at the bottom of the I-shaped crossbar 63. A limiting wheel 64 is installed at the middle of the I-shaped crossbar 63. The wire rope 4 passes through the limiting wheel 64. The wire rope 4 is subjected to gravity and presses down on the limiting wheel 64. The I-shaped crossbar 63 moves down, and the limiting groove 611 deforms.

[0026] A pad 66 is mounted on the top of the mounting base 62, and a U-shaped support plate 67 is mounted on the top of the pad 66. A strain gauge load cell 65 is mounted in the middle of the mounting base 62, below the U-shaped support plate 67. The strain gauge load cell 65 monitors the weight borne by the I-shaped crossbar 63 and the limiting wheel 64. The strain gauge load cell 65 is a PW10 model, and its core component is a strain gauge. A strain gauge is a component that can sense the deformation of an object and generate a change in resistance. The strain gauge is attached to the surface of an elastic material (such as metal). When an external force is applied to the elastic element of the sensor, the elastic element deforms, causing a change in the resistance of the strain gauge. The change in resistance is proportional to the applied force or weight, and through precise circuitry and calculation, it can be converted into a corresponding weight value.

[0027] The transmission component 7 includes a mounting box 71 and a bottom rotating plate 72 movably mounted inside the bottom of the mounting box 71. An inner bracket 73 is installed inside the bottom rotating plate 72. An amplifier 74, an analog-to-digital converter 75, and a wireless communication module 76 are mounted on the top of the inner bracket 73. The amplifier 74, analog-to-digital converter 75, and wireless communication module 76 are electrically connected. The amplifier 74 is electrically connected to the strain gauge load cell 65. The amplifier 74 is a TL081 model and mainly uses a negative feedback mechanism to amplify the signal. It receives the signal at the input end, amplifies the signal by controlling a current source, and provides the amplified signal at the output end. The analog-to-digital converter 75 is an AD7799 model. The analog-to-digital converter 75 first processes the input analog signal... Sampling is used to obtain the value of the signal at a specific moment. The sampling rate (sampling frequency) must be at least twice the bandwidth of the input signal. The sampled analog signal is mapped to a finite number of digital values. The quantized discrete values ​​are converted into binary numbers (or other digital encoding formats). This binary code is the output of the ADC. The wireless communication module 76 uses an ESP32. The input digital data is encoded and converted into a format suitable for transmission. The data is mapped onto the carrier of the wireless signal through modulation technology. The modulated signal is transmitted through the radio frequency (RF) circuit. The signal propagates in the air. The remote wireless communication module 76 receives the signal through the antenna. The demodulated signal is decoded and processed to extract the required data.

[0028] A ventilation slot 77 is provided on the outer surface of the mounting box 71 and on the upper side of one side of the inner bracket 73. A dustproof net 78 is installed inside the ventilation slot 77. The ventilation slot 77 is used to dissipate the heat generated by the operation of the amplifier 74, analog-to-digital converter 75 and wireless communication module 76. The dustproof net 78 is used to protect the inside of the mounting box 71 from dust.

[0029] In this embodiment: when the wire rope 4 becomes loose, the downward pressure of the wire rope 4 on the limiting wheel 64 decreases, the I-shaped crossbar 63 moves upward due to the rebound force of the support spring 612, and the weight at the top of the U-shaped support plate 67 changes. The strain gauge load cell 65 senses the decrease in the weight of the object and converts it into an electrical signal, which is then transmitted to the amplifier 74 to amplify the signal to a readable level. The signal is then transmitted to the analog-to-digital converter 75 to convert the electrical signal into a digital signal, which is transmitted to the terminal (including a computer, etc.) via the wireless communication module 76. This completes the monitoring of the weight change at the top of the U-shaped support plate 67. When the weight change is too large, it can be known that the wire rope 4 is loose. When the weight change is small, it can be known that external factors caused the wire rope 4 to sway. This dual detection of the looseness of the wire rope 4 increases safety.

[0030] Working principle: When the wire rope 4 becomes loose, the friction between the wire rope 4 and the fixed pulley 57 causes the fixed pulley 57 to rotate, the balance plate 51 rotates, and the balance plate 51 causes the baffle 58 to lift upward. The proximity switch 31 loses its sensing signal, thus giving a stop signal, cutting off the action command of the pitch mechanism in time, and triggering the brake command of the pitch mechanism to stop the machine in an emergency. The weight at the top of the U-shaped bearing plate 67 changes, and the data is transmitted to the terminal through the strain gauge load cell 65, amplifier 74, analog-to-digital converter 75 and wireless communication module 76. If the weight change is too large, it can be known that the wire rope 4 is loose. If the weight change is small, it can be known that the wire rope 4 is shaking due to external factors. The looseness of the wire rope 4 is detected by dual detection.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting slack in the pitching wire rope of a ship loader, comprising a detection component (5), characterized in that: The detection component (5) includes a connecting bearing (53) and balance plates (51) fixedly installed on both sides of the connecting bearing (53). Support rods (54) are located at both ends of the connecting bearing (53), and a support base (55) is installed at the bottom end of each support rod (54). A circular threaded counterweight hole (52) is provided through the middle of each of the two sets of balance plates (51). A pulley connecting rod (56) is threaded between the two sets of balance plates (51) and on one side of the connecting bearing (53). A fixed pulley (57) is connected to the middle of the pulley connecting rod (56). An adjustable counterweight (59) is threaded on the outside of the balance plate (51) and on the side away from the pulley connecting rod (56). A baffle (58) is installed on the outside of the balance plate (51) and the baffle (58) is located at the lower end of the adjustable counterweight (59). A transmission component (7) is installed on the outside of a set of support rods (54). A monitoring component (6) is installed at the middle end of the connecting bearing (53). A wire rope (4) is provided at the upper end of the fixed pulley (57). A pitching boom (2) is installed at one end of the wire rope (4) and on the side of the pulley connecting rod (56). A winch (1) is installed at the other end of the wire rope (4). A limit bracket (3) is installed on one side of the baffle (58), and a proximity switch (31) is installed on the top of the limit bracket (3).

2. The device for detecting slack in the pitching wire rope of a ship loader according to claim 1, characterized in that: The monitoring component (6) includes a mounting base (62) and positioning plates (61) mounted on both sides of the top of the mounting base (62). The outer wall of the positioning plate (61) is provided with a limiting groove (611). An I-shaped crossbar (63) is movably installed between the two sets of positioning plates (61) and inside the limiting groove (611). A support spring (612) is installed at the bottom of the limiting groove (611). The top of the support spring (612) is installed at the bottom of the I-shaped crossbar (63). A limiting wheel (64) is installed at the middle end of the I-shaped crossbar (63).

3. The device for detecting slack in the pitching wire rope of a ship loader according to claim 2, characterized in that: A pad (66) is installed at the top of the mounting base (62), a U-shaped support plate (67) is installed at the top of the pad (66), and a strain gauge load cell (65) is installed at the middle of the mounting base (62) and below the U-shaped support plate (67).

4. The device for detecting slack in the pitching wire rope of a ship loader according to claim 1, characterized in that: The transmission component (7) includes a mounting box (71) and a bottom rotating plate (72) movably mounted inside the bottom of the mounting box (71). An inner bracket (73) is installed inside the bottom rotating plate (72), and an amplifier (74), an analog-to-digital converter (75), and a wireless communication module (76) are installed on the top of the inner bracket (73).

5. The device for detecting slack in the pitching wire rope of a ship loader according to claim 4, characterized in that: The amplifier (74), analog-to-digital converter (75) and wireless communication module (76) are electrically connected, and the amplifier (74) is electrically connected to the strain gauge load cell (65).

6. The device for detecting slack in the pitching wire rope of a ship loader according to claim 5, characterized in that: The outer surface of the mounting box (71) and the upper end of one side of the inner bracket (73) are provided with a ventilation groove (77), and a dustproof net (78) is installed inside the ventilation groove (77).

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