Steel wire rope tension acquisition system

Abstract

The invention discloses a steel wire rope tension acquisition system which comprises automatic steel wire rope tension balancing suspension devices and a high-speed pressure transmitter, a tension balancing oil cylinder is arranged in each automatic steel wire rope tension balancing suspension device, and a plurality of tension balancing oil cylinders are connected with high-pressure rubber pipes. The plurality of high-pressure rubber hoses are connected with the connecting pipes to form a closed loop; the high-speed pressure transmitters are connected to all the high-pressure rubber hoses, the multiple high-speed pressure transmitters are connected with the industrial computer, and the model of the high-speed pressure transmitters is Germany Weika S-20; a high-speed pressure transmitter is adopted to measure the pressure of a balance oil cylinder of each rope of the lifting steel wire rope of the multi-rope friction type lifting machine and collect data in real time, the data is subjected to graphical processing through special industrial software, a roller gasket is corrected according to a graph, and the pressure of the balance oil cylinder is measured. Therefore, the purpose that the difference between the tension of any steel wire rope for multi-rope lifting and the average tension does not exceed + / -10% is achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of mine vertical shaft hoists, specifically relating to a portable multi-rope friction hoist high-speed acquisition system for the tension of the hoisting wire rope. Background Technology

[0002] To prevent uneven stress on the lifting wire ropes due to inconsistent tension among multiple ropes, multi-rope friction hoists typically add an automatic tension balancing suspension device at the connection point between the top of the hoisting container and the wire ropes. The ends of all multiple wire ropes are connected to the hoisting container. The tension of the lifting wire ropes is divided into static tension and dynamic tension. The static tension difference mainly depends on the length of the wire rope, which can be solved by using traditional balancing cylinders or adjusting the length of the wire ropes. However, solving the dynamic tension difference has always been a challenge for the industry. Some wire ropes are subjected to excessive stress, while others are subjected to insufficient stress, which can easily shorten the lifespan of the wire ropes.

[0003] When detecting the tension of wire ropes in multi-rope friction hoists, methods typically include hydraulic pressure measurement using a balance cylinder, pressure measurement using drum liners, or measurement using a balance cylinder slider pressure sensor. These methods collect the required values ​​using pressure sensors and then perform calculations to measure the wire rope tension. Currently, commonly used sensors are limited by response time, with sampling rates generally not exceeding 50 times / second, while the dynamic tension data of the running wire rope changes constantly.

[0004] The Coal Mine Safety Regulations stipulate that the difference between the tension of any wire rope and the average tension in a multi-rope hoisting system shall not exceed ±10%. Existing pressure sensors cannot perform a comprehensive stress analysis of several wire ropes due to discontinuous data acquisition. Therefore, the current wire rope tension acquisition system cannot control the difference between the tension of any wire rope and the average tension within ±10%. Based on this, it is necessary to develop a new wire rope tension acquisition system. Summary of the Invention

[0005] The purpose of this invention is to provide a wire rope tension acquisition system that enables the difference between the tension of any wire rope in a multi-rope friction hoist and the average tension to be within ±10%.

[0006] The technical solution adopted in this invention is a wire rope tension acquisition system, comprising multiple wire ropes, each wire rope being connected to an automatic wire rope tension balancing suspension device, and each of the automatic wire rope tension balancing suspension devices being equipped with a tension balancing cylinder, characterized in that it further comprises:

[0007] Multiple high-pressure hoses are connected to the inlet of each tension balancing cylinder, and the multiple high-pressure hoses are connected to the connecting pipe to form a closed loop;

[0008] High-speed pressure transmitters are connected to each high-pressure hose. Multiple high-speed pressure transmitters are connected to an industrial computer. Each high-speed pressure transmitter can acquire data on the tension of the corresponding wire rope thousands of times per second. Finally, the acquired data is processed graphically by the industrial computer.

[0009] Each high-pressure hose is connected to a tee. The first port of the tee is connected to the tension balancing cylinder through the high-pressure hose, the second port of the tee is connected to the high-speed pressure transmitter, and the third port of the tee is connected to the connecting pipe.

[0010] A first shut-off valve is also connected between the tee and the tension balancing cylinder.

[0011] A second shut-off valve is also connected between the tee and the connecting pipe.

[0012] The high-speed pressure transmitter's data output interface is also connected to a multi-functional interface box, whose data output interface is connected to an industrial computer via a data acquisition card.

[0013] The multi-functional interface box is also connected to an explosion-proof intrinsically safe power supply box for power supply.

[0014] The high-speed pressure transmitter is model S-20 from WIKA Germany.

[0015] The beneficial effects of this invention are:

[0016] This invention discloses a wire rope tension acquisition system. It uses a high-speed pressure transmitter to measure and collect real-time data on the balancing cylinder pressure of each wire rope in a multi-rope friction hoist, achieving a sampling rate of up to 1000 times per second. The collected data is then graphically processed using specialized industrial software. Based on the graphical representation, the roller liner is adjusted, thereby achieving the goal that the tension of any single wire rope in the multi-rope friction hoist does not differ from the average tension by more than ±10%. Furthermore, based on specific test results (such as...),... Figure 4-7 See, the maximum tension difference can be controlled within ±5%. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a wire rope tension acquisition system according to the present invention;

[0018] Figure 2 This is a schematic diagram of the automatic tension balancing suspension device for a wire rope tension acquisition system according to the present invention.

[0019] Figure 3 This is a schematic diagram of the automatic tension balancing suspension device for a wire rope tension acquisition system according to the present invention.

[0020] Figure 4This is a tension curve of the lifting wire rope for a six-rope friction hoist with a drum diameter of 4.6 meters.

[0021] Figure 5 This is a tension curve of the lifting wire rope for a six-rope friction hoist with a drum diameter of 4.6 meters.

[0022] Figure 6 This is a tension curve of the lifting wire rope in a two-rope friction hoist with a drum diameter of 2.6 meters.

[0023] Figure 7 This is a tension curve of the lifting wire rope in a two-rope friction hoist with a drum diameter of 2.6 meters.

[0024] In the diagram, 1. Wire rope, 2. High-speed pressure transmitter, 3. Tension balancing cylinder, 4. Multifunctional interface box, 5. Industrial computer, 6. Data acquisition card, 7. Explosion-proof intrinsically safe power supply box, 8. First shut-off valve, 9. Second shut-off valve, 10. Middle plate, 11. Side plate, 12. Wedge rope ring, 13. Pad, 14. Reversing fork, 15. Connecting pipe. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0026] The tension measurement of the wire rope in a multi-rope friction hoist typically employs methods such as hydraulic pressure measurement with a balance cylinder, pressure measurement with a drum liner, or pressure measurement with a balance cylinder slider sensor. These methods involve collecting the required values ​​using pressure sensors and then performing calculations to measure the wire rope tension.

[0027] Currently used sensors are limited by response time, and their sampling rate is generally no more than 50 times / second, while the dynamic tension data of the running wire rope changes every moment.

[0028] The Coal Mine Safety Regulations stipulate that the difference between the tension of any wire rope and the average tension in a multi-rope hoisting system shall not exceed ±10%. Existing pressure sensors cannot perform a comprehensive stress analysis of several wire ropes due to discontinuous data acquisition. Therefore, the current wire rope tension acquisition system cannot control the difference between the tension of any wire rope and the average tension within ±10%. Based on this, it is necessary to develop a new wire rope tension acquisition system.

[0029] This invention discloses a wire rope tension acquisition system, comprising: multiple wire ropes 1, the beginnings of which are connected to a lifting container, and the ends of which are connected to a drum. The drum has a positioning groove corresponding to each wire rope, and a drum liner is installed in each positioning groove. An automatic tension balancing suspension device connects the wire ropes to the lifting container, and each automatic tension balancing suspension device contains a tension balancing cylinder. High-pressure hoses are connected to the multiple tension balancing cylinders, and these high-pressure hoses are connected to a connecting pipe 15 to form a closed loop. A high-speed pressure transmitter 2 is connected to each high-pressure hose, and the multiple high-speed pressure transmitters 2 are connected to an industrial computer 5. Each high-speed pressure transmitter 2 can acquire data on the tension of the corresponding wire rope thousands of times per second. The acquired data is then graphically processed by the industrial computer 5.

[0030] Furthermore, the high-speed pressure transmitter 2 is a German Wicker S-20. This invention uses a high-speed pressure transmitter (sampling 1000 times per second) to measure and collect real-time data on the balancing cylinder pressure of each wire rope in a multi-rope friction hoist (by connecting and then closing all the connecting valves on the side of the hoisting container being tested). The data is then graphically processed using specialized industrial software, and the roller liner is corrected based on the graph, thereby achieving the goal that "the difference between the tension of any single wire rope in a multi-rope hoist and the average tension shall not exceed ±10%".

[0031] Each high-pressure hose is connected to a tee. The first port of the tee connects to the tension balancing cylinder 3, and the second port connects to the signal input terminal of the high-speed pressure transmitter 2. The signal output terminal of the high-speed pressure transmitter 2 connects to the industrial computer 5. The second port of the tee also connects to the connecting pipe 15. A first shut-off valve 8 connects the tee to the tension balancing cylinder 3, and a second shut-off valve 9 connects the tee to the connecting pipe 15. The first shut-off valve 8 is used to connect the tension balancing cylinder 3 to the high-pressure hose, and the second shut-off valve 9 is mainly for convenient connection to the high-speed pressure transmitter 2. Additionally, when the second shut-off valve 9 is open, it can also be used to calibrate whether the pressure transmitter is intact. The multiple tension balancing cylinders 3 in the multiple tension automatic balancing suspension devices are connected to form a closed loop through the high-pressure hoses and connecting pipe 15, thus the tension on multiple steel wire ropes can be automatically balanced through the tension automatic balancing suspension devices.

[0032] The data output interface of the high-speed pressure transmitter 2 is also connected to a multi-functional interface box 4. The data output interface of the multi-functional interface box 4 is connected to the industrial computer 5 via a data acquisition card 6. The multi-functional interface box 4 is also connected to an explosion-proof intrinsically safe power supply box 7 for power supply, as detailed below. Figure 1As shown, the interconnection relationship of each component is as follows: 6 high-speed pressure transmitters 2 are connected to the liquid supply port of tension balancing cylinder 3 of each wire rope 1; the explosion-proof intrinsically safe power supply box provides 18V intrinsically safe power to the multi-functional interface box, and the multi-functional interface box 4 leads the power to the 6 high-speed pressure transmitters, while receiving feedback signals from the sensors, which are then converted and sent to the industrial computer.

[0033] The automatic tension balancing suspension device for wire rope also includes two opposing center plates 10, with side plates 11 on both sides of the two center plates 10. The tension balancing cylinder 3 is located between the two center plates 10. The upper ends of the two center plates 10 are connected to wedge-shaped rope rings 12 via upper pins, and the wedge-shaped rope rings 12 are connected to the wire rope 1. The lower ends of the two center plates 10 are connected to pads 13 via bolts. The lower end of the piston rod of the tension balancing cylinder 3 abuts against the pads 13. The pads 13 are also slidably connected to the side plates 11. The upper end of the tension balancing cylinder 3 is connected to the side plates 11 via threads. The lower ends of the two side plates 11 are connected to the reversing fork 14 via lower pins. The reversing fork 14 is used to connect to the lifting container. Because the pad 13 can slide freely along the side plate (therefore the side plate 11 is both a force-bearing component and a track for the pad 13 to move), when the piston rod of the tension balancing cylinder 3 extends, it pushes the pad 13 down, thereby driving the middle plate 10 down, and the wedge rope ring 12 down. At this time, the distance between the wedge rope ring 12 and the lifting container is shortened, and the wire rope 1 is taut. When the piston rod of the tension balancing cylinder 3 retracts, it drives the middle plate up through the pad 13, and the wedge rope ring 12 moves up. The distance between the wedge rope ring 12 and the lifting container becomes longer, and the force on the wire rope 1 decreases. In summary, the automatic tension balancing suspension device for wire ropes can achieve automatic tension balancing of wire ropes.

[0034] The wire rope tension acquisition system of this invention was used to conduct relevant experiments, and the final experimental results are as follows: Figure 4 The graph shows the tension curve of the wire rope of a six-rope friction hoist with a drum diameter of 4.6 meters. Each color represents the tension of one wire rope (the tension curve before processing using the balancing method, with the difference in rope groove diameter measured by the marking method as 0.5 mm). The vertical axis represents pressure, and the horizontal axis represents time. As can be seen from the graph, the tension difference of the wire rope reaches 17%, which far exceeds the requirements of the "Coal Mine Safety Regulations". Figure 5 The figure shows the tension curve of the hoisting wire rope of a six-rope friction hoist with a drum diameter of 4.6 meters (the tension curve is processed using the balancing method, and the difference in rope groove diameter is measured to be 0 mm using the marking method). The vertical axis represents pressure, and the horizontal axis represents time. It can be seen from the figure that the tension difference of the wire rope is 4.8%, which is much less than the requirement of the "Coal Mine Safety Regulations". Figure 6The figure shows the tension curve of the wire rope of a two-rope friction hoist with a drum diameter of 2.6 meters (the difference in rope groove diameter was measured to be 0.46 mm using the marking method without balancing). The vertical axis represents pressure and the horizontal axis represents time. As can be seen from the figure, the tension difference of the wire rope reaches 15%, which far exceeds the requirements of the "Coal Mine Safety Regulations". Figure 7 The graph shows the tension curve of the wire rope in a two-rope friction hoist with a drum diameter of 2.6 meters (the tension curve has been processed using a balancing method, and the difference in rope groove diameter is measured to be 0 mm using the marking method). The vertical axis represents pressure, and the horizontal axis represents time. As can be seen from the graph, the tension difference of the wire rope is 5%, which is much less than the requirement of the "Coal Mine Safety Regulations".

[0035] Based on field usage, the maximum tension difference can be controlled within ±5%, the horizontal markings drawn on the guide wheel of the friction hoist have not shifted (indicating that the diameter difference of the drive drum rope groove is 0), the hoist's operating current is more stable (it used to change from tens to units), the operating noise is significantly reduced (around 10 dB), and after two years of continuous use, the rope groove diameter difference measured by the marking method is still 0 mm. The wire rope runs smoothly with little vibration, which can effectively extend the service life of the wire rope and drum friction pads.

[0036] The embodiments described above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited thereto. Any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the scope of the technology disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A wire rope tension acquisition system, comprising multiple wire ropes (1), each wire rope (1) being connected to an automatic wire rope tension balancing suspension device, each of the automatic wire rope tension balancing suspension devices being equipped with a tension balancing cylinder (3), characterized in that, Also includes: Multiple high-pressure hoses are connected to the inlet of each tension balancing cylinder (3), and the multiple high-pressure hoses are connected to the connecting pipe (15) to form a closed loop; A high-speed pressure transmitter (2) is connected to each of the high-pressure hoses. Multiple high-speed pressure transmitters (2) are connected to an industrial computer (5). Each high-speed pressure transmitter (2) can acquire data on the tension of the corresponding wire rope thousands of times per second. Finally, the acquired data is processed graphically by the industrial computer (5).

2. The wire rope tension acquisition system according to claim 1, characterized in that, Each of the high-pressure hoses is connected to a tee. The first port of the tee is connected to the tension balancing cylinder (3) through the high-pressure hose, the second port of the tee is connected to the high-speed pressure transmitter (2), and the third port of the tee is connected to the connecting pipe (15).

3. The wire rope tension acquisition system according to claim 2, characterized in that, A first shut-off valve (8) is also connected between the tee and the tension balancing cylinder (3).

4. The wire rope tension acquisition system according to claim 2, characterized in that, A second shut-off valve (9) is also connected between the tee and the connecting pipe (15).

5. A wire rope tension acquisition system according to claim 2, characterized in that, The data output interface of the high-speed pressure transmitter (2) is also connected to a multi-functional interface box (4), and the data output interface of the multi-functional interface box (4) is connected to the industrial computer (5) through a data acquisition card (6).

6. The wire rope tension acquisition system according to claim 5, characterized in that, The multi-functional interface box (4) is also connected to an explosion-proof intrinsically safe power supply box (7) for power supply.

7. The wire rope tension acquisition system according to claim 1, characterized in that, The high-speed pressure transmitter (2) is a German Wicker S-20.

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