CN111005718A - Experimental device for safety operation performance of coal mining machine under inclined condition - Google Patents

Abstract

The invention relates to a safety operation performance experiment device under the condition of coal mining machine inclination, which comprises a rotating platform, a test platform, a coal mining machine walking track, a simulated coal shoveling plate, a three-way force loader and a safety winch, wherein the coal mining machine walking track, the three-way force loader and the safety winch are all fixed on the test platform, the three-way force loader adopts a detachable fixed installation mode, the simulated coal shoveling plate is supported and installed on the test platform through a plurality of vertical oil cylinders and is arranged in parallel to the coal mining machine walking track, two ends of the vertical oil cylinders are respectively hinged relative to the simulated coal shoveling plate and the test platform, the safety winch is close to one end of the coal mining machine walking track, and the test platform is. The invention can simulate the working conditions of the fully mechanized coal mining face such as inclination, steep inclination and the like, and provides safe, stable, standard, wide application range and convenient-to-operate comprehensive matched hardware equipment for the safe operation performance experiment and detection of the coal mining machine under the condition of the working face with a larger inclination angle.

Description

Experimental device for safety operation performance of coal mining machine under inclined condition

Technical Field

The invention relates to an experimental device for a coal mining machine, in particular to an experimental device for testing the safe running performance of the coal mining machine under an inclined condition, and belongs to an experimental device for verifying and analyzing the safe running performance of the coal mining machine.

Background

The inclined and steep coal seams in China account for 28.8 percent of the total reserves, and the coal seams with the inclination angle of more than 35 degrees account for more than 17 percent. At present, the fully-mechanized mining technology is applied to inclined coal seams in China relatively mature, but the verification and analysis of the safe operation performance of a coal mining machine under an inclined condition have defects. Particularly, the maximum inclination angle of the current coal mining working face exceeds 60 degrees, and under the working condition of heavy inclination, the coal mining machine has serious potential safety hazards such as rapid gliding, brake failure and the like, so that the verification and analysis of the safe operation performance of the coal mining machine under the inclination condition are urgently needed to be implemented and completed.

At present, effective experimental means and equipment are lacked, and standardized and normalized coal mining machine safe operation performance experiments under various inclination conditions cannot be realized.

Disclosure of Invention

In order to solve the problems, the invention provides a device for testing the safe running performance of a coal mining machine under the inclined condition, which can simulate the working conditions of an inclined and steeply inclined fully mechanized coal mining working face and the like, and provides safe, stable, standard, wide application range and convenient-to-operate comprehensive matched hardware equipment for testing and detecting the safe running performance of the coal mining machine under the working face condition with a larger inclination angle.

The main technical scheme of the invention is as follows:

the safety operation performance experiment device under the condition of the inclination of the coal mining machine comprises a rotating platform, a test platform, a coal mining machine walking track, a simulated coal shoveling plate, a three-way force loader and a safety winch. Coal mining machine walking track, three-way force loader and safety winch all fix on the test platform, wherein three-way force loader adopts the fixed mounting mode of dismantling, and coal mining machine walking track is the straight line and lays, and coal mining machine walking track is laid along test platform's length direction, simulation shovel coal board is installed through the support of a plurality of vertical hydro-cylinders on the test platform and be on a parallel with coal mining machine walking track and arrange, the both ends of vertical hydro-cylinder are relative simulation shovel coal board respectively and test platform are articulated, and safety winch is close to coal mining machine walking track's wherein one end, and test platform is with tiling mode fixed stay on the revolving stage.

The coal mining machine walking track can comprise a plurality of bases and a plurality of tooth rails, the bases are arranged at intervals along a T-shaped groove in the test platform, positioning is achieved through the T-shaped groove, the bases are fastened on the test platform, the tooth rails are sequentially connected end to end and laid into a straight line shape, and adjacent end portions of two adjacent tooth rails are directly or detachably fixed on the same base through a transition sleeve.

Still preferably be provided with base and a plurality of horizontal hydro-cylinder on the test platform, base and test platform sliding fit, the slip direction is along test platform's mesa and perpendicular to coal-winning machine walking track direction, and slip power comes from horizontal hydro-cylinder, the both ends of horizontal hydro-cylinder respectively with base and test platform are connected, simulation shovel coal board passes through vertical hydro-cylinder direct support is installed on the base, base formula structure as an organic whole or be the integrated configuration that forms of arranging in proper order along coal-winning machine walking track extending direction by a plurality of piecemeals.

The three-way force loader is provided with two sets which are arranged at intervals, the three sets are positioned and installed on the test platform through another T-shaped groove on the test platform, and the two T-shaped grooves are parallel to each other.

The testing platform is preferably fixedly provided with double-rod multi-stage oil cylinders, cylinder barrels of the double-rod multi-stage oil cylinders are fixedly arranged on the testing platform, and piston rods in two extending directions of the double-rod multi-stage oil cylinders are connected with the two sets of three-way force loaders in a one-to-one correspondence mode.

The automatic escalator is preferably arranged along the extending direction of the coal mining machine walking track, and the automatic escalator and the coal mining machine walking track are respectively positioned on two sides of the three-way force loader.

The side edges of the test platform, which are positioned on two sides of the walking track of the coal mining machine, and the side edges between the two side edges, which are close to one side of the safety winch, are preferably provided with protective fences, and the protective fences are provided with acousto-optic alarms and radar ranging sensors.

The rotary table comprises a rack, a connecting rod, a sleeve, an arc-shaped positioning device and a jack, wherein one middle part of the rack in the length direction is hinged to a rotary base which is fixed relative to a concrete foundation, the other middle part of the rack is supported on the concrete foundation through the jack, the rack is hinged to the jack, the jack is hinged to the concrete foundation, one end of the rack is hinged to one end of the connecting rod, the other end of the connecting rod is inserted into the sleeve from one end of the sleeve, the other end of the sleeve is hinged to the concrete foundation, a plurality of first positioning holes are formed in the connecting rod at intervals, one end of the sleeve is provided with a first pin hole, the arc-shaped positioning device is installed on the concrete foundation, and at least one row of a plurality of second positioning holes which are arranged according to the arc-shaped intervals is arranged on the arc-shaped positioning device, the circular arc center of a circle is located on the rotation center axis of the rotary base, the other end of the rack is provided with a second pin hole, all second positioning holes which are arranged at intervals on the first positioning hole and the same circular arc and a plurality of positions which can be stably located on the rack are in one-to-one correspondence, when the rack is located at one position, the sleeve is simultaneously spliced with the first pin hole and the first positioning hole through the first positioning pin to realize fixation with the connecting rod, the other end of the rack is simultaneously spliced with the second pin hole and the second positioning hole through the second positioning pin to realize fixation with the arc-shaped positioning device, the test platform is tiled and fixed on the rack, and the safety winch is located when the rotary table is in a relative horizontal plane inclined state, and the higher end of the test platform is arranged.

The revolving stage is still preferred to be equipped with first hydro-cylinder and second hydro-cylinder, and the cylinder of first hydro-cylinder is relative the sleeve is fixed, the flexible direction of first hydro-cylinder with first pinhole is coaxial, first locating pin coaxial fixation is in the tip of the overhanging end of the piston rod of first hydro-cylinder, the cylinder of second hydro-cylinder is relative arc positioner is fixed, the flexible direction of second hydro-cylinder with the second pinhole is coaxial, the coaxial fixation of second locating pin is in the tip of the overhanging end of the piston rod of second hydro-cylinder.

The arc-shaped positioning device can comprise a pair of vertical plates which are bilaterally symmetrical, each vertical plate is provided with a row of second positioning holes which are arranged at intervals in an arc shape, the other end of the rack is positioned between the pair of vertical plates, and the left side and the right side of the other end of the rack are respectively provided with one second pin hole which correspond to the second positioning holes on the left vertical plate and the right vertical plate. In this case, when the second cylinder is provided, the second cylinder is preferably a double-rod cylinder, and one second positioning pin is coaxially fixed to an end of the outward extending end of each piston rod and corresponds to the two second pin holes, respectively.

Further, dispose rotary encoder on the rack, be equipped with the hole in first locating pin and the second locating pin, downthehole high accuracy camera of installing separately, all install displacement sensor in first hydro-cylinder and the second hydro-cylinder, displacement sensor, high accuracy camera and rotary encoder's signal output part all inserts same microprocessor, a plurality of instruction signal output parts of microprocessing connect the signal input part of an electromagnetic proportional valve respectively, and the control of a part electromagnetic proportional valve the flexible of jack, the control of another part electromagnetic proportional valve the flexible of first hydro-cylinder and second hydro-cylinder.

The invention has the beneficial effects that:

the invention uses the test platform to simulate the working face of the coal mining machine, guides the coal mining machine to be tested to walk on the test platform by paving the walking track of the coal mining machine on the test platform and simulating the coal shoveling plate, utilizes the three-way force loader to simulate the stress of the coal mining machine in the cutting process, and successfully simulates the states of the working face of the coal mining machine and the coal mining machine during coal mining, thereby realizing the test of the safe running performance of the coal mining machine under the inclined condition in a laboratory environment, solving the problem that the prior test lacks effective experimental means and equipment, and having great significance for ensuring the safety of the walking of the coal mining machine on the inclined working face. Because the laboratory environment is clean and tidy, controllable and less in interference, the accuracy and the credibility of the detection result are higher. Due to the fact that suitable sensors or detection equipment of various types can be configured, data of various aspects can be obtained in one-time walking, and the comprehensive performance test related to the walking of the coal mining machine is facilitated.

According to the invention, the escalator is arranged on the test platform, so that the test condition can be conveniently checked by related workers, and the working intensity of the workers is reduced.

According to the invention, the protection fence is arranged on at least three sides of the test platform, and the acousto-optic alarm and the radar ranging sensor are arranged on the protection fence, so that workers can be effectively prevented from falling off from the edge of the test platform, and the safety of experimenters is ensured.

According to the invention, the safety winch is arranged on the test platform, and the coal mining machine to be tested is connected to the safety winch through the steel wire rope, so that the coal mining machine to be tested can be prevented from sliding down accidentally to cause safety accidents, and the safety of the coal mining machine and the experimental process is ensured.

Because the intelligent rotary table is adopted to support the test platform, the requirements of experiments on the safe operation performance of the coal mining machine under various angle inclination conditions in a large angle range can be met by one set of experiment device, the inclination angle is automatically adjustable, the labor intensity of the adjustment of the experiment device is greatly reduced, and the adjustment precision is easier to ensure.

Because the revolving stage is equipped with the first locating hole and the second locating hole of multiunit one-to-one, can support the rack on the angle of multiple difference on the one hand, realize combining the simulation of adopting the multiple slope condition of working face, on the other hand combines rotating basis, jack to provide more than two strong points for the rack, forms hyperstatic structure for even the coal-winning machine is in also can provide reliable and stable support for it under the heavy load operating mode, the security is higher, thereby ensure going on smoothly of simulation experiment.

The experimental device can realize the simulation test of the coal mine fully-mechanized coal mining working face with multi-angle inclination, steep inclination and the like in a wide-angle range, has good support stability, intelligent and adjustable angle, good safety and low working strength, and can be universally used for various coal mining machines with different specifications.

Drawings

FIG. 1 is a schematic plan layout of one embodiment of the present invention;

FIG. 2 is a side view of one embodiment of the test platform;

FIG. 3 is a schematic structural diagram of another embodiment of the present invention;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a schematic view of the arcuate positioning device of FIG. 3;

FIG. 6 is a right side view of FIG. 5;

FIG. 7 is a schematic structural view of one embodiment of the locating pin.

Reference numerals:

1. a rotating table; 1-1. a rack; 1-2. connecting rod; 1-3. a sleeve; 1-4, a jack; 1-5, an arc positioning device; 1-6, oil cylinder seat; 1-7, a first oil cylinder; 1-8, a first positioning pin; 1-9. high precision camera; 1-10. a second oil cylinder; 1-11. a second locating pin; 1-12. rotating the base; 1-13. concrete foundation; 2. a coal mining machine walking track; 3. a protective fence; 4. an escalator; 5. a safety winch; 6. a three-dimensional force loading device; 6-1, a three-way force loader; 6-2, double-rod multi-stage oil cylinder; 7. a test platform; 7-1, a first T-shaped groove; 7-2. a second T-shaped groove; 8. simulating a coal shoveling plate.

Detailed Description

The invention discloses an experimental device (short for experimental device) for safe operation performance of a coal mining machine under an inclined condition, as shown in fig. 1-7, the device comprises a rotating platform 1, a testing platform 7, a coal mining machine walking track 2, a simulated coal shoveling plate 8, a three-way force loader 6-1 and a safety winch 5, wherein the coal mining machine walking track 2, the three-way force loader 6-1 and the safety winch 5 are all fixed on the testing platform, wherein the three-way force loader adopts a detachable fixed installation mode, the walking track of the coal mining machine is laid in a straight line shape, the simulated coal shoveling plate 8 is supported and installed on the test platform 7 through a plurality of vertical oil cylinders and is arranged in parallel to the coal mining machine walking track 2, the two ends of the vertical oil cylinder are hinged to the simulation coal shoveling plate and the test platform respectively, the safety winch is close to one end of the walking track of the coal mining machine, and the test platform is fixedly supported on the rotating table in a tiled mode.

The test platform is an installation base platform of the components of a coal mining machine walking track and the like except the rotating platform, the coal mining machine walking track is used for walking of the walking wheel of the coal mining machine to be tested, and the simulation coal shoveling plate is used for sliding of the supporting sliding shoe of the coal mining machine to be tested. The three-way force loader is used for applying X, Y, Z loads in three mutually perpendicular directions to the rocker arm of the coal mining machine to be tested so as to simulate the force borne by the coal mining machine during the cutting process, including impact load. The three-way force loader can be provided with oil cylinders in three orthogonal directions, and force loading in corresponding directions is implemented when the oil cylinders extend outwards. The test platform is driven by the rotating platform to be adjustable to different inclination angles so as to simulate the condition that the coal mining machine is positioned on inclined working faces at various different angles.

The experimental device can be used for testing some performance parameters of the tested coal mining machine in the walking process of the coal mining machine on the walking track of the coal mining machine and the simulated coal shoveling plate, such as walking distance, vibration, noise, temperature, stress condition and the like, and the performance parameters are mainly detected by arranging sensors of corresponding types. The test items which can be implemented by the experimental device can also comprise coal cutter traction current, brake release time, brake torque and the like when the coal cutter is started, walks and brakes, and corresponding data are mainly obtained by reading the data of an electric control system of the coal cutter to be tested through a control terminal of the experimental bench. The control terminal is the center of the electrical control system of the laboratory bench.

The test platform can be placed in various inclined states with different inclination angles to simulate the inclined working surface environment, so that the experiment table can also be used for walking test under the inclined condition of the coal mining machine. When the test platform is horizontally placed, the coal mining machine to be tested is placed at one end, not provided with the safety winch, of the test platform, the steel wire rope is connected with the safety winch and the machine body of the coal mining machine to be tested, and the steel wire rope is enabled to keep a loose state. And then, the test platform is placed at a certain inclination angle according to the experimental requirements by using the rotating platform, the safety winch is positioned at the higher end of the test platform at the moment, and the coal mining machine to be tested walks from the lower end to the higher end of the test platform, in the process, besides all the detection items, more importantly, some items of walking safety of the coal mining machine under the inclined condition can be detected, such as the gliding distance when the coal mining machine is started, the gliding distance when the coal mining machine is braked under the condition of different traction speeds, the gliding distance after the coal mining machine is static for 24 hours during loading, and the like, and the corresponding gliding distance is not more than the specified value and is qualified.

The safety winch is used for providing safety guarantee. As the shearer under test moves upwards gradually, the safety winch slowly retracts the wire rope, but the wire rope is kept slack all the time, and a redundant length enough to allow the shearer to freely slide downwards within a prescribed downward sliding distance is reserved. During the experiment, the steel wire rope on the safety winch is connected to the body of the coal mining machine to be tested, once the coal mining machine to be tested slides down abnormally, namely exceeds the specified value to a certain extent, the steel wire rope immediately plays a role, the steel wire rope is changed from a loose state to a tensioning state, and the coal mining machine to be tested is pulled to prevent the coal mining machine to be tested from continuously sliding down to cause safety accidents.

Furthermore, the test platform may be provided with corresponding test instruments and/or sensors according to specific experimental items, such as a laser target, a laser distance measuring sensor, an infrared temperature tester, a vibration sensor, a noise sensor, and the like, which are important components of an electrical control system configured with hardware facilities of the experiment table, and are used for collecting test data. The control terminal of the electric control system can process and analyze the acquired data and can also transmit the related data to other upper computers for data processing and analysis.

The laser target is matched with the laser ranging sensor, the walking or gliding distance of the coal mining machine to be tested can be measured and calculated by receiving and sending laser signals, the laser target is usually fixed on the coal mining machine to be tested during use, and the laser ranging sensor is fixed on the testing platform. The infrared temperature tester can be used for testing the oil temperature, the temperature of the reducer, the temperature of the brake and the like of the coal mining machine to be tested. The vibration sensor can be arranged in a walking track of the coal mining machine, and the vibration of the whole machine of the coal mining machine to be detected can be detected by the vibration sensor. The noise sensor can be used for detecting the noise of the whole machine when the detected coal mining machine climbs. Sensors for measuring the distance traveled by or sliding down the shearer, such as the laser ranging sensors described above, are often integral sensors of the experimental apparatus.

The vertical oil cylinder is controlled to stretch, and the height of the top surface of the simulated coal shoveling plate relative to the test platform is changed, so that the height of the supporting skid shoe of the coal mining machine to be tested with different specifications is adapted. The expansion and contraction of the vertical oil cylinder are controlled by an electromagnetic proportional valve, and the electromagnetic proportional valve acts according to the instruction of a microprocessor. And a displacement sensor is arranged in the vertical oil cylinder, the signal output end of the displacement sensor is connected to the microprocessor, and the moving distance of the vertical oil cylinder is fed back to the microprocessor to form closed-loop control. The microprocessor is the core component of the control terminal.

In this embodiment, the vertical oil cylinders are arranged in two rows, and the vertical oil cylinders in each row are arranged at intervals along the length direction of the simulated coal shoveling plate.

The experimental device provides a basic, repeatable test environment with safety protection measures for the safety operation performance experiment under the condition of the inclined working surface of the coal mining machine, so that the corresponding test can be carried out in a laboratory, the accuracy and the reliability of the detection result are higher, and the experimental device can be suitable for the coal mining machines with various specifications. Due to the fact that the sensors or detection equipment of various types can be configured appropriately, data of more aspects can be acquired in one-time walking of the coal mining machine, and all-directional data reference can be provided for safety operation performance analysis of the coal mining machine under the inclined condition.

The coal mining machine walking track can comprise a plurality of bases and a plurality of tooth tracks, wherein the bases are arranged at intervals along a first T-shaped groove 7-1 on the test platform, positioning is realized through the first T-shaped groove, and the bases are fastened on the test platform through screws and the like. The base is a mounting base for the rack. The rack rails are sequentially connected end to end and laid into a straight line shape, and the adjacent end parts of two adjacent rack rails are detachably fixed on the same base directly or through a transition sleeve. One set of laboratory bench can be equipped with the rack of the different specifications of multiunit, rack mounting structure on the base can be according to the design of the biggest a set of rack of size, and other group racks respectively have a set of supporting transition cover, and when these group racks were installed, the tip of rack was installed in supporting transition cover separately, and corresponding transition cover then is installed with the rack mounting structure cooperation on the base. When the coal mining machine to be tested changes and needs to replace another set of rack rails with different specifications, only the rack rails and the transition sleeves matched with the rack rails need to be replaced at the same time, and the distance between the bases needs to be adjusted in the length direction, so that the coal mining machine to be tested with various walking wheel modules can be tested by using the same experiment table.

The three-way force loader 6-1 is provided with two sets which are arranged at intervals, the positioning is realized through a second T-shaped groove 7-2 on the test platform, the three-way force loader can be detachably and fixedly connected relative to the test platform, and the first T-shaped groove and the second T-shaped groove are parallel to each other.

The part above the test platform may be further optimised in any one or more of the following aspects:

1. the test platform can be fixedly provided with double-rod oil cylinders, the cylinder barrels of the double-rod oil cylinders are fixedly arranged on the test platform, and the piston rods in two extending directions of the double-rod oil cylinders are correspondingly connected with the two sets of three-way force loaders one by one. The three-way force loader and the double-rod oil cylinder form a three-dimensional force loading device 6.

The distance between the two sets of loaders can be changed by telescopic adjustment of the double-rod oil cylinder. Because each set of loader is loaded on one rocker arm on the coal mining machine to be tested, the extension and retraction of the double-rod oil cylinder can enable the three-dimensional force loading device to load the coal mining machines to be tested with different lengths. When the length of the coal mining machine to be measured changes, the positions of at least one set of loader need to be correspondingly adjusted and then are fixed again.

The double-rod oil cylinder can further preferably adopt a double-rod multi-stage oil cylinder 6-2, and the double-rod oil cylinder can output larger force and has larger telescopic distance.

2. The three-dimensional force sensor is preferably arranged on the coal mining machine walking track and used for detecting the all-directional force condition borne by the guide sliding shoe in the walking process of the coal mining machine, providing data support for analyzing the reason that the guide sliding shoe is worn too fast and even broken, and providing reference for designing the guide sliding shoe suitable for the inclined and steep conditions.

3. The test platform is preferably a cast steel structure.

4. The test platform is preferably in a strip shape, the length of the test platform is 25-35m, the width of the test platform is 5-6m, and the test platform can meet the experiment requirements of the maximum coal mining machine with the total length of more than 20m and the length of the machine body of 10m at present. The thickness of the test platform is preferably 50-60mm in order to reduce weight and ensure rigidity.

In this example the test platform was 30m long, 6m wide and 55mm thick.

The coal mining machine walking track is laid along the length direction of the test platform, and is preferably as long as the test platform.

5. The simulated coal shoveling plate is a wear-resistant steel plate, is preferably made of high manganese steel, is integrally subjected to quenching and tempering treatment, and has the hardness of HB280-320, and the top surface is subjected to quenching treatment, and has the hardness of HRC 55-60.

The simulation coal shoveling plate is preferably as long as the test platform. The width of the simulated coal shoveling plate can be 0.4-0.6m, the thickness can be 55-75mm, and the width of the simulated coal shoveling plate is 0.5m and the height is 65mm in the embodiment.

The width of the simulation coal shoveling plate can be set to be not less than 1m, for example, 1-1.2m, and under the condition that the distance between the simulation coal shoveling plate and the walking track of the coal mining machine is proper, the test requirements of the coal mining machine with all the widths at present can be met. In this case, the following structure 6 may not be optimized.

6. The testing platform is preferably provided with a base and a plurality of transverse oil cylinders, the base is in sliding fit with the testing platform, the sliding direction is along the table surface of the testing platform and perpendicular to the walking track direction of the coal mining machine, and the sliding power comes from the transverse oil cylinders. And the transverse oil cylinders are arranged at intervals along the extending direction of the coal mining machine walking track, and two ends of each transverse oil cylinder are respectively connected with the base and the test platform. Under the condition, the simulation coal shoveling plate is directly supported and installed on the base through the vertical oil cylinder, namely, two ends of the vertical oil cylinder are respectively hinged to the simulation coal shoveling plate and the base. Because the distance between the base and the coal mining machine walking track can be changed by the extension and contraction of the transverse oil cylinder, the distance between the simulated coal shoveling plate and the coal mining machine walking track is changed accordingly, and the device can be suitable for the coal mining machines to be detected with different widths.

And in the same way, the extension and retraction of the transverse oil cylinder are controlled by the electromagnetic proportional valve, and the electromagnetic proportional valve acts according to the instruction of the microprocessor. And a displacement sensor is also arranged in the transverse oil cylinder, and the signal output end of the displacement sensor is connected to the microprocessor and feeds back the moving distance of the transverse oil cylinder to the microprocessor to form closed-loop control.

The base can be of an integrated structure, or can also be of a combined structure formed by sequentially arranging a plurality of base monomers along the extending direction of the coal mining machine walking track. When the base adopts a combined structure, each base monomer is provided with a transverse oil cylinder connected with the base monomer and used for providing power for the sliding of the corresponding blocks.

No matter the integral base or the base single body is provided with the guide structures respectively, the guide structures and the test platform are used for ensuring the linear sliding direction of the base.

7. The side edges of the test platform, which are positioned on two sides of the coal mining machine walking track, namely two long edges of the test platform, and the side edge between the two side edges, which is close to one side of the safety winch, namely one short edge of the test platform, which is close to the safety winch are provided with the protective fence 3, so that a worker is prevented from falling off from the edge of the test platform.

The protective fence can be further provided with a plurality of acousto-optic alarms and radar ranging sensors, the distance from a person to the protective fence is measured in real time through the radar ranging sensors, once the distance is smaller than a set distance, for example 0.5m, the acousto-optic alarms give an alarm to prompt related persons to pay attention to the fact that the distance is not smaller than 0.5m with the protective fence.

8. An escalator (such as a moving sidewalk elevator) 4 is preferably arranged on the test platform and is used for relevant workers to walk, so that the working condition of the experimental device can be conveniently checked, and the working strength of the workers can be reduced.

The escalator is arranged along the extending direction of the coal mining machine walking track, and the escalator and the coal mining machine walking track are respectively positioned on two sides of the three-way force loader. Typically, the escalator is disposed near one side edge of the test platform.

The rotating platform 1 may include a platform 1-1, a connecting rod 1-2, a sleeve 1-3, an arc-shaped positioning device 1-5, and a jack 1-4. One middle part of the length direction of the rack is hinged to a rotary base 1-12, the rotary base is fixed relative to a concrete foundation 1-13, the other middle part of the rack is supported on the concrete foundation through the jack, and the rack is hinged to the jack and the concrete foundation. One end (corresponding to the higher end in fig. 3) of the stand is hinged to one end of the connecting rod, the other end of the connecting rod is inserted into the sleeve from one end of the sleeve, and the other end of the sleeve is hinged relative to the concrete foundation. A plurality of first positioning holes are formed in the connecting rod at intervals, and one end of the sleeve is provided with a first pin hole. The arc-shaped positioning device is installed on the concrete foundation, at least one row of a plurality of second positioning holes are arranged on the arc-shaped positioning device at intervals in an arc shape, and the circle center of the arc shape is located on the rotating central axis of the rotating base. The other end of the rack is provided with a second pin hole. The length and width dimensions of the test platform are preferably comparable to those of a bench.

The connecting rod 1-2, the sleeve 1-3, the arc-shaped positioning device 1-5, the jack 1-4 and the rotating base 1-12 form a position-adjustable supporting system which is used for supporting the rack and enabling the rack to be stably positioned at a plurality of different positions.

The first positioning holes correspond to all the second positioning holes which are arranged on the same arc at intervals and a plurality of positions where the rack can be stably located one by one. When the rack is located at one position, the sleeve is simultaneously spliced with the first pin hole and the first positioning hole through the first positioning pins 1-8 to realize fixation with the connecting rod, and the other end (corresponding to the lower end in the figure 3) of the rack is simultaneously spliced with the second pin hole and the second positioning hole through the second positioning pins 1-11 to realize fixation with the arc-shaped positioning device.

The inclination angle of the rack is changed once every time when another group of corresponding first positioning hole and second positioning hole are replaced to be respectively matched with the first positioning pin and the second positioning pin in a pin hole mode.

The test platform 7 is flatly laid and fixed on the rack 1-1, and the safety winch is located at the higher end of the test platform when the rotating platform is in an inclined state relative to the horizontal plane.

The rack 1-1 is used as a coal mining machine to be tested, the testing platform and a bearing base part arranged on each part above the testing platform, preferably adopts a truss structure, has stable structure and strong bearing capacity, and reduces the weight of the rack as much as possible on the premise of ensuring the bearing capacity. The length of the rack can be 25-35m, the width can be 5-6m, and the rack can bear the largest coal mining machine at present so as to meet the experimental requirement of the largest coal mining machine.

The distance between the other end of the connecting rod and the first positioning hole closest to the connecting rod is 100-150mm, and the distance between the first pin hole and one end of the sleeve is 50-100 mm.

In the embodiment shown in the attached drawings, the rack is in a rectangular long plate shape, the other end of the sleeve is connected to the concrete foundation through a hinged base, the diameter of the first pin hole is equal to that of the first positioning hole, the diameter of the second pin hole is equal to that of the second positioning hole, the distance between the other end of the connecting rod and the first positioning hole closest to the other end of the connecting rod is 100mm, and the distance between the first pin hole and one end of the sleeve is 80 mm.

The two jacks 1-4 can be symmetrically arranged on two sides of the sleeve 1-3 in the width direction of the rack.

The rotating table 1 is preferably provided with a first oil cylinder 1-7 and a second oil cylinder 1-10, a cylinder barrel of the first oil cylinder is fixed relative to the sleeve, the telescopic direction of the first oil cylinder is coaxial with the first pin hole, and the first positioning pin is coaxially fixed at the end part of the extending end of the piston rod of the first oil cylinder; the cylinder barrel of the second oil cylinder is fixed relative to the arc-shaped positioning device, the stretching direction of the second oil cylinder is coaxial with the second pin hole, and the second positioning pin is coaxially fixed at the end part of the extending end of the piston rod of the second oil cylinder. The first oil cylinder, the second oil cylinder and the jack are respectively controlled by an electromagnetic valve, and signal input ends of the electromagnetic valves are all connected to the same microprocessor. The microprocessor and the electromagnetic valve respectively control the first oil cylinder and the second oil cylinder to act, the first positioning pin is inserted into or pulled out of the first pin hole and one first positioning hole by utilizing the automatic stretching of the first oil cylinder, and the second positioning pin is inserted into or pulled out of the second pin hole and the corresponding second positioning hole by utilizing the automatic stretching of the second oil cylinder.

The oil cylinder is used for automatic pin inserting/pulling operation of part or all links, so that the automation level of position adjustment of the rotating platform is improved. The microprocessor is a command center for realizing automatic control, and the control also comprises the step of indirectly controlling the jack to move to finely adjust the position of the rack by sending an instruction to the electromagnetic valve in addition to controlling the first oil cylinder and the second oil cylinder to move.

In the embodiment shown in the drawings, the arc-shaped positioning device comprises a pair of vertical plates which are symmetrical left and right (corresponding to the left and right sides of fig. 4, and corresponding to the width direction of the stand), each vertical plate is provided with a row of second positioning holes which are arranged at intervals in an arc shape, the other end of the stand is positioned between the pair of vertical plates, the left side and the right side of the other end of the stand are respectively kept in a gap with the left vertical plate and the right vertical plate, and the left side and the right side of the other end of the stand are respectively provided with one second pin hole which respectively corresponds to the second positioning holes on the left vertical plate and the right vertical. In this case, when the second cylinder is provided, two single-rod cylinders may be employed as the second cylinders, corresponding to one row of the second positioning holes, respectively. In this embodiment, the second cylinder preferably adopts a double-rod cylinder, the second cylinder is disposed in a cylinder mounting hole which is coaxial and communicated with the two second pin holes in the other end of the rack, and the end of the extending end of each piston rod is coaxially fixed with one second positioning pin. When the piston rod of the second oil cylinder stretches, the two second positioning pins are simultaneously inserted into the second positioning holes and the second pin holes on the corresponding sides, or are simultaneously pulled out from the second positioning holes and the second pin holes on the corresponding sides.

The left side and the right side of the other end of the stand are respectively 5-10mm away from the left vertical plate and the right vertical plate, and the gap is 5mm in the embodiment shown in the attached drawing.

The end face of the vertical plate facing the rotating base is preferably an arc-shaped cylindrical end face. The distance from the second positioning hole to the arc-shaped columnar end face can be 100-150 mm.

In the embodiment shown in the attached drawings, the sleeve 1-3 is relatively fixed with an oil cylinder seat 1-6, and the first oil cylinder is arranged in the oil cylinder seat 1-6.

The rack is also provided with a rotary encoder, and the signal output end of the rotary encoder is connected to the microprocessor, so that the microprocessor can master the angle of the rack in real time.

The rotating platform is also preferably provided with high-precision cameras 1-9, stepped holes can be formed in the first positioning pin and the second positioning pin, as shown in fig. 7, the high-precision cameras, power cables and signal transmission cables thereof are respectively installed in the holes, and the signal output ends of the high-precision cameras are connected to the microprocessor. The high-precision camera is used for monitoring the positions of the first positioning pin and the second positioning pin relative to the first positioning hole and the second positioning hole respectively, the output of the high-precision camera is returned to the microprocessor, the microprocessor can judge whether the first positioning pin and the first positioning hole are coaxial or not and whether the second positioning pin and the second positioning hole are coaxial or not through identification, calculation and analysis of returned image information, and when the first positioning pin and the second positioning pin are not inserted into the corresponding positioning holes, the coaxial camera has basic conditions for inserting the positioning pins into the corresponding positioning holes. If the positioning pin and the positioning pin are not coaxial, the microprocessor can send a rack fine adjustment instruction, the electromagnetic proportional valve controls the jack to slowly move, and the position of the rack is finely adjusted until the rack reaches a specified position, namely the first positioning pin and the second positioning pin and the corresponding first positioning hole and second positioning hole reach the coaxial position. Once the coaxial positioning pin is arranged, the microprocessor sends an installation instruction, the electromagnetic proportional valve controls the first oil cylinder and the second oil cylinder to act, the first positioning pin is inserted into the first positioning hole and the first pin hole, and the second positioning pin is inserted into the second positioning hole and the second pin hole, so that the intelligent installation of the first positioning pin and the second positioning pin is completed.

And displacement sensors are respectively arranged in the first oil cylinder and the second oil cylinder so as to monitor the stretching amount of the corresponding oil cylinders in real time, and the stretching amount reflects the displacement or the position of the first positioning pin and the second positioning pin respectively. The signal output end of the displacement sensor is connected to the microprocessor, the measured value of the displacement sensor is fed back to the microprocessor, and the microprocessor can judge whether the first positioning pin and the second positioning pin are inserted into or pulled out of the first positioning hole and the second positioning hole or at what position in the inserting or pulling-out process.

One end of the first positioning pin and one end of the second positioning pin are machined with chamfers to facilitate installation of the corresponding positioning pins, and the chamfers can be preferably 10-20 degrees, and are 15 degrees in the embodiment.

The number and the positions of the first positioning holes and the second positioning holes determine how many different angles the rack can be stably positioned. In the invention, the included angles of a plurality of positions where the rack can be stably positioned relative to the horizontal plane are preferably controlled within the range of 0-65 degrees so as to meet the simulation of the maximum inclination angle condition of the current coal face.

The first positioning pin and the second positioning pin can be automatically pulled out by controlling the contraction of the first oil cylinder and the second oil cylinder, the position locking of the rack is released, then the jack is controlled to act, the connecting rod is driven to stretch relative to the sleeve, the position of the rack is changed and corrected, the automatic installation of the first positioning pin and the second positioning pin is completed by controlling the outward extension of the oil cylinders, and the rack is locked at a new position, so that the intelligent adjustment of the position of the rotating platform is realized. Because set up displacement sensor, high accuracy camera and rotary encoder on the revolving stage, can master the position change of first locating pin, second locating pin and rack in real time, consequently ensured the accuracy of automatic installation and the accuracy of rack position automatic adjustment.

Claims (12)

1. The utility model provides a coal-winning machine safe operation performance experimental apparatus under slope condition which characterized in that: including revolving stage, test platform, coal-winning machine walking track, simulation shovel coal board, three-dimensional force loader and safety winch, coal-winning machine walking track, three-dimensional force loader and safety winch are all fixed test platform is last, and wherein the three-dimensional force loader adopts and to dismantle fixed mounting mode, and coal-winning machine walking track is the straight line and lays, simulation shovel coal board is installed through a plurality of vertical hydro-cylinder supports test platform is last and be on a parallel with coal-winning machine walking track and arrange, simulation shovel coal board and test platform are articulated relatively respectively at the both ends of vertical hydro-cylinder, and safety winch is close to the orbital wherein one end of coal-winning machine walking, and test platform is with tiling mode fixed stay on the revolving stage.

2. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 1, is characterized in that: the coal mining machine walking track comprises a plurality of bases and a plurality of toothed rails, the bases are arranged at intervals along a T-shaped groove in the test platform, positioning is achieved through the T-shaped groove, the bases are fastened on the test platform, the toothed rails are sequentially connected end to end and laid into a straight line shape, and adjacent end portions of two adjacent toothed rails are detachably fixed on the same base directly or through a transition sleeve.

3. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 2, is characterized in that: still be provided with base and a plurality of horizontal hydro-cylinder on the test platform, base and test platform sliding fit, the slip direction is along test platform's mesa and perpendicular to coal-winning machine walking track direction, and slip power comes from horizontal hydro-cylinder, the both ends of horizontal hydro-cylinder respectively with base and test platform are connected, simulation shovel coal board passes through vertical hydro-cylinder direct support is installed on the base, base formula structure as an organic whole or be by a plurality of piecemeals along the integrated configuration that coal-winning machine walking track extending direction arranged in proper order and form.

4. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 3, is characterized in that: the three-way force loader is provided with two sets which are arranged at intervals, the three sets are positioned and installed on the test platform through another T-shaped groove on the test platform, and the two T-shaped grooves are parallel to each other.

5. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 4, is characterized in that: the test platform is also fixedly provided with double-rod multi-stage oil cylinders, the cylinder barrels of the double-rod multi-stage oil cylinders are fixedly arranged on the test platform, and the piston rods in two extending directions of the double-rod multi-stage oil cylinders are connected with the two sets of three-way force loaders in a one-to-one correspondence mode.

6. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 5, is characterized in that: the automatic escalator is arranged along the extending direction of the coal mining machine walking track, and the automatic escalator and the coal mining machine walking track are respectively positioned on two sides of the three-way force loader.

7. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 6, is characterized in that: the side that is located coal-winning machine walking track both sides of test platform and is close to safety winch one side between these two sides all is provided with the protection rail, be provided with acousto-optic alarm and radar range sensor on the protection rail.

8. The experimental device for the safety operation performance of the coal mining machine under the inclined condition as claimed in claim 1, 2, 3, 4, 5, 6 or 7, is characterized in that: the rotary table comprises a rack, a connecting rod, a sleeve, an arc-shaped positioning device and a jack, wherein one middle part of the rack in the length direction is hinged to a rotary base which is fixed relative to a concrete foundation, the other middle part of the rack is supported on the concrete foundation through the jack, the rack is hinged to the jack, the jack is hinged to the concrete foundation, one end of the rack is hinged to one end of the connecting rod, the other end of the connecting rod is inserted into the sleeve from one end of the sleeve, the other end of the sleeve is hinged to the concrete foundation, a plurality of first positioning holes are formed in the connecting rod at intervals, one end of the sleeve is provided with a first pin hole, the arc-shaped positioning device is installed on the concrete foundation, and at least one row of a plurality of second positioning holes which are arranged according to the arc-shaped intervals is arranged on the arc-shaped positioning device, the circular arc center of a circle is located on the rotation center axis of the rotary base, the other end of the rack is provided with a second pin hole, all second positioning holes which are arranged at intervals on the first positioning hole and the same circular arc and a plurality of positions which can be stably located on the rack are in one-to-one correspondence, when the rack is located at one position, the sleeve is simultaneously spliced with the first pin hole and the first positioning hole through the first positioning pin to realize fixation with the connecting rod, the other end of the rack is simultaneously spliced with the second pin hole and the second positioning hole through the second positioning pin to realize fixation with the arc-shaped positioning device, the test platform is tiled and fixed on the rack, and the safety winch is located when the rotary table is in a relative horizontal plane inclined state, and the higher end of the test platform is arranged.

9. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 8, is characterized in that: the revolving stage still is equipped with first hydro-cylinder and second hydro-cylinder, and the cylinder of first hydro-cylinder is relative the sleeve is fixed, the flexible direction of first hydro-cylinder with first pinhole is coaxial, first locating pin coaxial fixation is in the tip of the overhanging end of the piston rod of first hydro-cylinder, the cylinder of second hydro-cylinder is relative arc positioner is fixed, the flexible direction of second hydro-cylinder with the second pinhole is coaxial, the coaxial fixing of second locating pin is in the tip of the overhanging end of the piston rod of second hydro-cylinder.

10. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 9, is characterized in that: the arc-shaped positioning device comprises a pair of vertical plates which are bilaterally symmetrical, a row of second positioning holes which are arranged at intervals in an arc shape are formed in each vertical plate, the other end of the rack is located between the pair of vertical plates, the left side and the right side of the other end of the rack are respectively provided with one second pin hole and respectively correspond to the second positioning holes in the left vertical plate and the right vertical plate, the second oil cylinder adopts a double-rod oil cylinder, and the end part of the extending end of each piston rod is coaxially fixed with one second positioning pin and respectively corresponds to the two second pin holes.

11. The experimental device for the safety operation performance of the coal mining machine under the inclined condition of the coal mining machine as claimed in claim 10, is characterized in that: dispose rotary encoder on the rack, be equipped with the hole in first locating pin and the second locating pin, install the high accuracy camera separately in the hole, all install displacement sensor in first hydro-cylinder and the second hydro-cylinder, displacement sensor, high accuracy camera and rotary encoder's signal output part all inserts same microprocessor, a plurality of instruction signal output parts of microprocessing connect the signal input part of an electromagnetic proportional valve separately, and partly electromagnetic proportional valve control the flexible of jack, another part electromagnetic proportional valve control the flexible of first hydro-cylinder and second hydro-cylinder.

12. The safety operation performance test device for the coal mining machine under the inclined condition according to the claim 8, 9, 10 or 11, is characterized in that: the included angle of a plurality of positions, in which the racks can be stably positioned, corresponding to the first positioning holes and all the second positioning holes arranged on the same circular arc at intervals in a one-to-one mode is in the range of 0-65 degrees relative to the horizontal plane.

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