CN1299967C - Fast rope changing device of floor type multirope friction elerator - Google Patents

Abstract

A floor-type multi-rope friction hoist quick rope changing device is mainly used for changing the head rope and tail rope of the floor-type multi-rope friction hoist. Its purpose is to shorten the rope changing time, improve safety and reduce labor intensity of workers. The invention includes a stepping rope changing mechanism, an anti-running rope mechanism and an automatic monitoring and alarm device; the stepping rope changing mechanism includes a stepping oil cylinder, a clamping mechanism and a base; the anti-running rope mechanism includes a sleeve, a rope threading pipe, Gland, wedge block, spring and spring seat, hydraulic cylinder, mounting frame, pin, U-shaped card, needle valve type oil cup and channel steel; automatic monitoring and alarm device includes pressure monitoring and alarm mechanism and running rope monitoring and alarm mechanism; The pressure monitoring and alarming mechanism includes A/D converter, pressure sensor, PLC, relay and pressure module; the running rope monitoring and alarming mechanism includes tachogenerator, electromagnetic reversing valve, A/D converter, PLC and relay.

Description

Floor type multi-rope friction hoist quick change rope device

technical field

The invention relates to a device for quickly replacing the head rope and the tail rope of a floor type multi-rope friction hoist.

Background technique

The maintenance work of the multi-rope friction hoist is more complicated than that of the winding hoist, because the length of each wire rope of the multi-rope friction hoist must be kept equal, so that the workload of replacing, inspecting, and adjusting the wire rope increases. Especially the rope change work. According to Article 379 of my country's "Coal Mine Safety Regulations", the service life of the friction hoist steel wire rope (ie the first rope) shall not exceed two years, and the service life of the balance steel wire rope (ie the tail rope) shall not exceed four years. Therefore, for the main and auxiliary For mines where the wells are all friction hoists, the head rope needs to be replaced once a year on average, and the tail rope needs to be replaced once every two years. At present, the rope changing devices used by various mines are mainly processed by themselves. Due to the lack of formal design and strength calculation, there is a problem that the strength of the rope changing devices is not enough, which is a hidden danger to mine safety production. At the same time, because the main hoist is out of sync with the stabilizing car, there are problems such as rope torsion, twisted bends, new steel ropes and old steel ropes, new steel ropes and new steel ropes twisted together, etc., which directly affect the quality of rope replacement, and even make new rope Damaged, injured, endangering mine safety.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a floor-type multi-rope friction hoist quick rope changing device that can shorten the rope changing time, improve safety, and reduce the labor intensity of workers.

The invention includes a stepping rope changing mechanism, a rope running prevention mechanism and an automatic monitoring and alarming device. The stepping rope changing mechanism includes a stepping oil cylinder, a clamping mechanism and a base; the stepping oil cylinder is a double-acting piston rod hydraulic cylinder; the clamping mechanism includes an upper pressing block, a lower pressing block, a double-acting single piston rod hydraulic cylinder, Large rocker, small rocker and pin shaft; one end of the stepping cylinder is connected with the lower pressing block of the clamping mechanism through bolts, and the upper pressing block and lower pressing block are connected through the large rocker, small rocker and pin shaft, double-acting The single-piston-rod hydraulic cylinder is mounted between two large rockers through pin shafts. The base is fixed on the foundation.

The anti-running rope mechanism includes a sleeve, a rope threading pipe, a gland, a wedge block, a spring and a spring seat, a hydraulic cylinder, a mounting frame, a pin, a U-shaped card, a needle valve type oil cup and a channel steel; a spring, a spring seat , The wedge block is put into the sleeve, the sleeve and the gland are connected by bolts, and the needle valve oil cup is installed on the sleeve; the U-shaped card fixes the hydraulic cylinder on the mounting frame, and the hydraulic cylinder is connected with the channel steel through pins , the channel steel and the wedge block are close together.

The automatic monitoring and alarming device includes a pressure monitoring and alarming mechanism and a running rope monitoring and alarming mechanism. The pressure monitoring and alarm mechanism includes A/D converter, pressure sensor, PLC, relay and pressure module. The running rope monitoring and alarm mechanism includes a tachogenerator, an electromagnetic reversing valve, an A/D converter, a PLC and a relay. The pressure monitoring and alarm mechanism is installed on the hydraulic cylinder of the anti-running rope mechanism. The tachometer generator of the running rope monitoring and alarm mechanism contacts the new steel wire rope through the rubber wheel, and the PLC sends out a signal to control the action of the electromagnetic reversing valve.

The inner surfaces of the upper pressing block and the lower pressing block are coated with polyurethane friction material. The pressure sensor is a silicon diffusion pressure sensor.

The pressure monitoring and alarm mechanism controls the start and stop of the motor according to the change of the pressure value. The running rope monitoring and alarm mechanism converts the linear motion of the steel wire rope into rotary motion, and converts the lowering speed of the new steel wire rope into an electrical signal, which is transmitted to the PLC to send a signal to control the action of the electromagnetic reversing valve.

The working principle of the stepping rope changing mechanism is as follows: when oil is supplied, the piston rod of the stepping cylinder extends to drive the clamping mechanism to move forward; when no oil is supplied, the stepping cylinder returns oil, and the clamping mechanism resets. The wire rope is passed between the lower pressing block and the upper pressing block, and the expansion and contraction of the double-acting single-piston rod hydraulic cylinder drives the movement of the large rocker, thereby realizing the functions of clamping and releasing the rope of the clamping mechanism. The invention adopts the one-time rope changing scheme of "the old rope is hung with the new rope, and the new rope is used to recycle the old rope". At the same time, a stepping rope changing mechanism is introduced to send the steel wire rope into the sky wheel and the drum to ensure the quality of the rope changing. The inner surfaces of the upper and lower pressure blocks of the stepping rope change mechanism are coated with polyurethane friction material, which can protect the steel wire rope and ensure the quality of the rope change.

The pressure monitoring and alarm mechanism adopts PLC to control the motor to control whether the oil pump supplies oil to the hydraulic cylinder, and the pressure value is detected by the pressure sensor and converted into a digital signal through the pressure module. The PLC compares the digital signal from the pressure module with the pressure given value, and uses it as a control signal to control the start and stop of the motor, with dynamic LED pressure value and alarm display. When the display light is red, it means that the motor is working, that is, the pump supplies oil to the hydraulic cylinder. If it is green, it means that the motor does not operate. When the traffic lights flash alternately, it means that the automatic rope monitoring mechanism has activated. The running rope detection and alarm mechanism utilizes the tachometric generator to measure the lowering speed of the steel wire rope. When the speed is greater than the set value, the PLC sends an instruction, the hydraulic cylinder of the anti-running rope mechanism returns oil, holds the wire rope tightly, and the display light is red at the same time.

The invention is applicable to hoists with different rope diameters. It can realize the rapid replacement of the wire rope of the hoist, has a simple structure, reliable operation, occupies less equipment, reduces the labor intensity of workers, and has a short construction time. It only takes 0.5 working days to lower the 500-meter wire rope. Because the wire ropes are replaced at the same time, the force is relatively uniform, reducing the wear of the wire ropes. All the mechanisms, sensors and electric control devices of the quick rope change system are located at the wellhead, which is easy to use and operate. Significant economic benefits.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a structural schematic diagram of the stepping rope changing mechanism.

Fig. 3 is a structural schematic diagram of the anti-running rope mechanism.

Figure 4 is a schematic block diagram of the pressure monitoring and alarm mechanism.

Fig. 5 is a schematic block diagram of the running rope monitoring and alarming mechanism.

In the figure: 1. Steel wire rope drum, 2. New steel wire rope, 3. Anti-running rope mechanism, 4. Stepping rope changing mechanism, 5. Guide roller, 6. Joint, 7. Guide sky wheel, 8. Main roller, 9. Old steel wire rope, 10, auxiliary skip, 11, main skip, 12, base, 13, pin shaft, 14, stepping oil cylinder, 15, lower pressing block, 16, big rocker, 17, shaft, 18, double action Hydraulic cylinder, 19, upper pressing block, 20, small rocker, 21, gland, 22, sleeve, 23, spring, 24, threading pipe, 25, spring seat, 26, wedge block, 27, needle valve type Oil cup, 28, mounting frame, 29, pin, 30, hydraulic cylinder, 31, channel steel, 32, U-shaped card.

Detailed ways

Take the five-rope friction hoist as an example.

Put the spring 23, the spring seat 24, and the wedge block 26 into the sleeve 22, connect the sleeve 22 with the gland 21 with bolts, and install the needle valve type oil cup 27 on the sleeve 22 to form the anti-running rope Institution 3. Five sets of anti-running rope mechanisms are installed on the mounting frame 28, the hydraulic cylinder 30 is connected with a channel steel 31 by the pin 29, and the U-shaped card 32 fixes the hydraulic cylinder 30 on the mounting frame 28. The channel steel 31 is close to the wedge block 26, and when the piston rod stretches out, the channel steel 31 is driven to move, and the wedge block 26 also moves thereupon, compressing the spring 23. When the hydraulic cylinder 30 moved to the maximum stroke, the new steel wire rope 2 could be passed through five sets of anti-running rope mechanisms respectively. Channel steel 31 adopts 8# channel steel.

One end of the stepping oil cylinder 14 is connected with the lower pressing block 15 of the clamping mechanism with bolts, and the base 12 is fixed on the foundation. Two sets of upper pressing blocks 19, lower pressing blocks 15, large rocking bar 16, small rocking bar 20 and bearing pin 17 are installed on the base 12. Upper pressing block 19 and lower pressing block 15 inner surfaces are coated with polyurethane friction material, upper pressing block 19 and lower pressing block 15 are connected by big rocking bar 16, small rocking bar 20 and bearing pin 17. The double-acting hydraulic cylinder 18 is installed between the two big rockers 16 through the pin shaft 17. When oil is supplied to the stepping oil cylinder 14, the piston rod stretches out, and the big rocker 16 swings to both sides, driving the small rocker 20 and the upper rocker. Briquetting block 19, bearing pin 17 also move thereupon promptly clamping wire rope. Since the present invention is used for the five-rope friction hoist, five sets of stepping mechanisms are installed in parallel according to the center distance of the friction hoist wire ropes.

The new steel rope 2 on the wire rope drum 1 passes through the wedge-shaped block 26, the spring seat 25, the rope pipe 24 of the anti-running rope mechanism 3 successively, passes between the upper pressing block 19 and the lower pressing block 15 of the stepping mechanism 4, Then pass through the guide drum 5 and link to each other with the old steel wire rope 9 through the joint 6.

The pressure sensor of the pressure monitoring and alarm mechanism is installed on the hydraulic cylinder of the anti-running rope mechanism, which sends a signal to the PLC, and the PLC sends an instruction to control the start and stop of the motor. Five tachogenerators of the running rope monitoring and alarm mechanism contact with five new steel wire ropes respectively through rubber wheels, and the linear motion of steel wire ropes is converted into rotary motion, sends signal to PLC, controls the hydraulic cylinder 30 of anti-running rope mechanism. When the wire rope is lowered and exceeds the set value, the PLC speed sends an instruction, and the hydraulic cylinder 30 of the anti-running rope mechanism returns oil, and the spring 23 resets, and now the wedge-shaped block 26 moves to hold the wire rope tightly.

Claims (3)

1. A floor-type multi-rope friction hoist fast rope changing device is characterized in that it includes a stepping rope changing mechanism, an anti-running rope mechanism and an automatic monitoring and alarm device; the stepping rope changing mechanism includes a stepping oil cylinder, a clamping mechanism and base; the stepping cylinder is a double-acting single-piston rod hydraulic cylinder; the clamping mechanism includes an upper pressing block, a lower pressing block, a double-acting single-piston rod hydraulic cylinder, a large rocker, a small rocker and a pin; One end of the oil inlet cylinder is connected with the lower pressure block of the clamping mechanism through bolts, and the upper pressure block and the lower pressure block are connected through a large rocker, a small rocker and a pin shaft, and the double-acting hydraulic cylinder is installed on the two large rocker rods through the pin shaft. Between; the anti-running rope mechanism includes a sleeve, a rope threading pipe, a gland, a wedge block, a spring and a spring seat, a hydraulic cylinder, a mounting frame, a pin, a U-shaped card, a needle valve oil cup and a channel steel; the spring , spring seat and wedge block are put into the sleeve, the sleeve and the gland are connected by bolts, and the needle valve type oil cup is installed on the sleeve; the U-shaped card fixes the hydraulic cylinder on the mounting frame, and the hydraulic cylinder is connected to The channel steel is connected, and the channel steel is close to the wedge block; the automatic monitoring and alarm device includes a pressure monitoring and alarm mechanism and a running rope monitoring and alarm mechanism; the pressure monitoring and alarm mechanism includes A/D converter, pressure sensor, PLC, relay and pressure module The running rope monitoring and alarm mechanism includes a tachogenerator, electromagnetic reversing valve, A/D converter, PLC and relay; the pressure monitoring and alarm mechanism is installed on the hydraulic cylinder of the anti-running rope mechanism; The machine contacts the new steel wire rope through the rubber wheel, and the PLC sends out a signal to control the action of the electromagnetic reversing valve. 2. The quick rope changing device of the floor type multi-rope friction hoist according to claim 1, characterized in that the pressure sensor is a silicon diffusion pressure sensor. 3. The quick rope changing device of the floor type multi-rope friction hoist according to claim 1, characterized in that the inner surfaces of the upper pressing block and the lower pressing block are coated with polyurethane friction material.

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