A coal discharge mechanism operation state monitoring test bench and application thereof

Abstract

The present application relates to a kind of coal release mechanism operating state monitoring test bench and its application, including hydraulic support, hydraulic support posture control device, rear scraper conveyor, rear scraper conveyor posture control device, bottom plate simulation device, host computer and controller;Hydraulic support is placed on hydraulic support posture control device, rear scraper conveyor is placed on rear scraper conveyor posture control device, and hydraulic support posture control device and rear scraper conveyor posture control device are placed on bottom plate simulation device;Hydraulic support, hydraulic support posture control device, rear scraper conveyor posture control device and bottom plate simulation device are connected with host computer by controller respectively.The data obtained by the monitoring test bench proposed in the present application have reference significance for intelligent coal release in actual top coal mining, so that top coal recovery rate can be maximized under different working conditions, and top coal recovery has high economic value and practical significance.

Description

TECHNICAL FIELD

[0001] The application relates to a caving mechanism operation state monitoring test bench and application thereof, and belongs to the technical field of caving support simulation experiment equipment. BACKGROUND

[0002] The development of the caving support is from the high-position open-sky window type single conveyor to the medium-position open-sky window type double conveyor, and then to the currently mainly applied low-position caving support. The main equipment of the low-position caving mining technology is composed of the low-position caving support and the double conveyor. When the low-position caving support caving, the tail beam swings down to open the caving opening, and the top coal falls into the rear scraper conveyor through the caving opening. However, the caving opening and the rear scraper conveyor are prone to misalignment in the caving process, so that the top coal cannot completely fall into the rear scraper conveyor and is scattered outside the conveyor, thereby reducing the top coal recovery rate. The underground environment and conditions are complex, the research cost is high, and it is difficult to replace the hydraulic support type, so the operation state of the caving mechanism of the hydraulic support of different types and different structures under different working conditions cannot be explored, and the operation state of the caving mechanism of the hydraulic support in the unreasonable position cannot be explored.

[0003] Through retrieval, it is found that the Chinese patent document CN108827673A discloses a coal mining face similar simulation experiment table suitable for different types of hydraulic supports. The bottom base includes a ladder and a stabilizing block, and a groove is formed in the top of the ladder. The top of the ladder and the stabilizing block are both rotatably connected with a rotating device, and the top of the rotating device is movably connected with a hydraulic loading device. The rotating device includes a rotatable connecting support, and the top of the rotatable connecting support is rotatably connected with a supporting jack. The top of the supporting jack is rotatably connected with the surface of the hydraulic loading device through the rotatable connecting support. The application relates to the technical field of coal mines. By changing the hinge positions between the top plate, the bottom plate, the shield plate, the hydraulic live column and the connecting rod of the multifunctional hydraulic support, different types of hydraulic supports are simulated, the loading capacity and the data accuracy are greatly improved, and three-dimensional simulation experiment of different types of hydraulic supports and different mining environment is realized on the same experimental platform.

[0004] Chinese patent document CN104807666A discloses an experimental device based on dynamic simulation of support and moving frame of coal mining face. It comprises an adjustable angle base, a loading experiment table, a variable frame type hydraulic support, a rock test piece, a slidable base, a signal acquisition system and a signal processing system, wherein the adjustable angle base comprises a hinged bottom plate, a pressure bearing plate and a front and rear connecting rod of the base; the loading experiment table is placed on the adjustable angle base; the variable frame type hydraulic support is placed below the loading base plate and above the slidable base; the rock test piece is placed above the support top beam and below the support base; the slidable base is placed above the pressure bearing plate of the adjustable angle base and below the rock test piece of the bottom plate; the signal acquisition system comprises a crack signal sensor, a crack signal amplifier, a pressure collector and a pressure sensor; and the signal processing system comprises a pressure oscilloscope and a waveform analyzer. The invention can realize coupling simulation research of various stope conditions.

[0005] However, most of the known published patent documents are dynamic simulation experiments of the working state of the hydraulic support itself, support and moving frame, and there is no monitoring experiment system for the operation state of the coal drawing mechanism and the rear scraper conveyor as a whole. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a coal drawing mechanism operation state monitoring test bench, which is specially used to simulate and monitor the operation working state of the coal drawing mechanism of the top coal caving support and the rear scraper conveyor.

[0007] The present application also provides a working method of the coal drawing mechanism operation state monitoring test bench.

[0008] The technical scheme of the present application is as follows:

[0009] A coal drawing mechanism operation state monitoring test bench, comprising a hydraulic support, a hydraulic support attitude control device, a rear scraper conveyor, a rear scraper conveyor attitude control device, a floor simulation device, an upper computer and a controller;

[0010] The hydraulic support is placed on the hydraulic support attitude control device, the rear scraper conveyor is placed on the rear scraper conveyor attitude control device, and the hydraulic support attitude control device and the rear scraper conveyor attitude control device are placed on the floor simulation device;

[0011] The hydraulic support, the hydraulic support attitude control device, the rear scraper conveyor attitude control device and the floor simulation device are respectively connected with the upper computer through the controller.

[0012] Preferably, the hydraulic support posture control device and the rear scraper conveyor posture control device each comprise an upper top plate, a lower bottom plate and six jacks, the upper and lower ends of the six jacks are connected to the upper top plate and the lower bottom plate respectively, and the six jacks are connected to the upper computer through a controller.

[0013] Preferably, the floor simulation device comprises four upper top plates, a lower bottom plate and jacks, each upper top plate is connected to the lower bottom plate through four jacks, and the jacks are connected to the upper computer through a controller.

[0014] Preferably, the lower bottom plate of the hydraulic support posture control device is connected to the four upper top plates of the floor simulation device through bolts.

[0015] Preferably, the lower bottom plate of the rear scraper conveyor posture control device is connected to the two upper top plates of the floor simulation device through bolts.

[0016] Preferably, the hydraulic support comprises a roof beam, a shield beam, a tail beam, a base, a hydraulic column, a front connecting rod and a rear connecting rod, the roof beam, the shield beam and the tail beam are connected in sequence; the base is provided with a first limiting guide rail, a second limiting guide rail, a rear connecting rod movable base, a front connecting rod fixed base, a rear row of column hole fixed base and a front row of column hole movable base; the rear connecting rod is hinged with a rear connecting rod variable support, the bottom end of the rear connecting rod variable support is connected to the rear connecting rod movable base, and the rear connecting rod movable base is arranged in the first limiting guide rail; the front connecting rod is hinged with a front connecting rod variable support, the bottom end of the front connecting rod variable support is connected to the front connecting rod fixed base, and the front connecting rod fixed base and the rear connecting rod movable base are connected through a first push jack; the bottom end of the hydraulic column is connected to the rear row of column hole fixed base and the front row of column hole movable base respectively, the rear row of column hole fixed base and the front row of column hole movable base are connected through a second push jack, and the front row of column hole movable base is arranged in the second limiting guide rail; the first push jack and the second push jack are connected to the upper computer through a controller.

[0017] Preferably, the rear connecting rod comprises a sleeve, a lead screw, a clutch and a first lead screw motor, the first lead screw motor is connected to the lead screw through the clutch, the lead screw is threadedly connected to the sleeve, the sleeve is hinged to the shield beam, and the first lead screw motor and the clutch are connected to the upper computer through a controller.

[0018] Preferably, the front connecting rod comprises a sleeve, a lead screw, a clutch and a second lead screw motor, the second lead screw motor is connected to the lead screw through the clutch, the lead screw is threadedly connected to the sleeve, the sleeve is hinged to the shield beam, and the second lead screw motor and the clutch are connected to the upper computer through a controller.

[0019] Preferably, the first lead screw motor and the second lead screw motor are step motors.

[0020] Preferably, the base is bolted to the upper top plate of the hydraulic support posture control device.

[0021] Preferably, the rear scraper conveyor is bolted to the upper top plate of the rear scraper conveyor posture control device.

[0022] Preferably, the shield beam comprises a body, the body being provided with a rear connecting rod fixed hinge support, a front connecting rod movable hinge support, a third push-jack and a third limiting guide rail; the rear connecting rod fixed hinge support is hingedly connected with a sleeve of the rear connecting rod, the front connecting rod movable hinge support is hingedly connected with a sleeve of the front connecting rod, the front connecting rod movable hinge support is arranged in the third limiting guide rail, the third push-jack is connected between the rear connecting rod fixed hinge support and the front connecting rod movable hinge support, and the third push-jack is connected with the upper computer through the controller.

[0023] Preferably, the monitoring test bench further comprises a visual monitoring device, the visual monitoring device comprising a camera, an image processing module and a data transmission module, the camera being fixedly connected to a three-way holder, the three-way holder being connected to the tail beam, and the camera being connected to the upper computer through the image processing module and the data transmission module. The advantage of this design is that the camera collects the stacking condition of the top coal on the rear scraper conveyor by the coal discharging mechanism, the image processing module performs basic processing such as sharpening and image segmentation on the collected pictures, and transmits the data to the upper computer, and the upper computer obtains the stacking condition of the top coal on the rear scraper conveyor by further processing, and judges whether the top coal is scattered outside the rear scraper conveyor, and whether the rear conveyor is overloaded or unloaded.

[0024] A working method of a coal discharging mechanism operation state monitoring test bench, comprising the following steps:

[0025] The upper computer sends instructions to the controller, and the controller controls the hydraulic column, the first lead screw motor, the second lead screw motor, the clutch, the first push-jack, the second push-jack and the jacks of each posture adjusting device to work, so as to change the structure parameters of the hydraulic support, simulate different types of supports, change the posture of the hydraulic support, simulate different working conditions of the support, change the posture of the rear scraper conveyor, simulate different working conditions of the conveyor, and change the posture of different upper top plates in the base plate simulation device, thereby simulating the influence of different working conditions of the support base plate on the coal discharging mechanism operation state and the top coal discharging condition.

[0026] The visual monitoring device monitors the coal discharging mechanism operation state and the top coal discharging condition on the rear scraper conveyor under each working condition, so as to obtain the influence result of each structure parameter or working condition on the coal discharging mechanism operation state.

[0027] The technical features and beneficial effects of the present application are as follows:

[0028] 1. This invention is the first to propose a test bench for monitoring the operating status of the coal discharge mechanism and the rear scraper conveyor, as well as the top coal discharge situation. This test bench is adjustable and can simulate different support models, different coal discharge heights, different support postures, different pitch angles of the coal discharge mechanism, different working postures of the rear scraper conveyor, and different positions of the rear scraper conveyor.

[0029] 2. The data obtained by the monitoring test bench proposed in this invention has reference value for intelligent coal release in actual top coal caving mining, enabling the top coal recovery rate to reach the maximum under different working conditions, which has high economic value and practical significance for top coal recovery. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the monitoring test bench;

[0031] Figure 2 This is a schematic diagram of a hydraulic support structure;

[0032] Figure 3 This is a schematic diagram of the hydraulic support base structure;

[0033] Figure 4 This is a schematic diagram of the hydraulic support shield beam structure;

[0034] In the diagram: 1 is the top beam, 2 is the protective beam, 3 is the tail beam, 4 is the rear scraper conveyor, 5 is the attitude control device for the rear scraper conveyor, 6 is the base plate simulation device, 7 is the visual monitoring device, 8 is the attitude control device for the hydraulic support, 9 is the base, 10 is the rear connecting rod, 11 is the front connecting rod, and 12 is the hydraulic column. 13 is the first limit guide rail, 14 is the variable support for the rear connecting rod, 15 is the movable base for the rear connecting rod, 16 is the first pushing jack, 17 is the fixed base for the front connecting rod, 18 is the variable support for the front connecting rod, 19 is the fixed base for the rear column socket, 20 is the second pushing jack, 21 is the movable base for the front column socket, 22 is the second limit guide rail, 23 is the second lead screw motor, 24 is the fixed hinge support for the rear connecting rod, 25 is the third pushing jack, 26 is the movable hinge support for the front connecting rod, 27 is the third limit guide rail, and 28 is the first lead screw motor. Detailed Implementation

[0035] The present invention will be further described below with reference to the embodiments and accompanying drawings, but is not limited thereto.

[0036] Example 1:

[0037] like Figures 1-4 As shown, this embodiment provides a coal feeding mechanism operation status monitoring test bench, including a hydraulic support, a hydraulic support attitude control device 8, a rear scraper conveyor 4, a rear scraper conveyor attitude control device 5, a bottom plate simulation device 6, a host computer, and a controller.

[0038] The hydraulic support is placed on the hydraulic support posture control device 8, the rear scraper conveyor 4 is placed on the rear scraper conveyor posture control device 5, and the hydraulic support posture control device 8 and the rear scraper conveyor posture control device 5 are placed on the floor simulation device 6.

[0039] The hydraulic support, the hydraulic support posture control device 8, the rear scraper conveyor posture control device 5 and the floor simulation device 6 are respectively connected with the upper computer through the controller.

[0040] Specifically, the hydraulic support posture control device 8 and the rear scraper conveyor posture control device 5 are the same in structure, and each includes an upper top plate, a lower bottom plate and six jacks, the upper and lower ends of the six jacks are respectively welded with the upper top plate and the lower bottom plate, and the six jacks are connected with the upper computer through the controller. The six jacks receive the control signal from the upper computer, and control the jacks to elongate or shorten, so as to simulate different postures of the hydraulic support base 9 such as lowering, lifting, tilting and horizontal, and further explore the influence of different postures of the hydraulic support on the running state of the coal placing mechanism, and accurately simulate different tilting degrees by quantitatively adjusting the extension length of the jacks, so as to perform quantitative analysis.

[0041] The floor simulation device 6 includes four upper top plates, a lower bottom plate and jacks, each upper top plate is connected with the lower bottom plate through four jacks, and the jacks are connected with the upper computer through the controller. The different tilting directions and angles of the upper top plates can be controlled according to the extension and contraction of the four jacks. The lower bottom plate of the floor simulation device 6 is fixed to the ground through foundation bolts, and the jacks are respectively connected with the upper top plate and the lower bottom plate through welding. When the upper computer issues an instruction to the controller, the controller controls the corresponding jacks to rise and fall according to the instruction, so as to change the positional relationship such as the angle and distance between the four upper top plates and the lower bottom plate of the floor simulation device, simulate different tilting directions and different tilting angles of the floor where the hydraulic support is located, and further simulate the uneven working conditions of the floor where the support is located in the fully mechanized working face, so as to explore the influence of different working conditions of the floor on the running state of the coal placing mechanism of the hydraulic support.

[0042] The lower bottom plate of the hydraulic support posture control device 8 is connected with the four upper top plates of the floor simulation device 6 through bolts.

[0043] The lower bottom plate of the rear scraper conveyor posture control device 5 is connected with two upper top plates in the floor simulation device 6 through bolts.

[0044] The hydraulic support comprises a top beam 1, a shield beam 2, a tail beam 3, a base 9, four hydraulic columns 12, a front connecting rod 11 and a rear connecting rod 10, the top beam 1, the shield beam 2 and the tail beam 3 are sequentially connected; the base 9 is provided with a first limiting guide rail 13, a second limiting guide rail 22, a rear connecting rod movable base 15, a front connecting rod fixed base 17, a rear row column nest fixed base 19 and a front row column nest movable base 21; the rear connecting rod 10 is hinged with a rear connecting rod variable support 14, the bottom end of the rear connecting rod variable support 14 is connected with the rear connecting rod movable base 15, and the rear connecting rod movable base 15 is slidingly installed in the first limiting guide rail 13; the front connecting rod 11 is hinged with a front connecting rod variable support 18, the bottom end of the front connecting rod variable support 18 is connected with the front connecting rod fixed base 17, and the front connecting rod fixed base 17 and the rear connecting rod movable base 15 are connected through the first push jack 16; the four hydraulic columns 12 are distributed and arranged in parallel on both sides, the bottom ends of the two hydraulic columns on the same side are connected with the rear row column nest fixed base 19 and the front row column nest movable base 21 in front and back respectively, the rear row column nest fixed base 19 and the front row column nest movable base 21 are connected through the second push jack 20, and the front row column nest movable base 21 is slidingly installed in the second limiting guide rail 22; the first push jack 16 and the second push jack 20 are connected with the upper computer through a controller.

[0045] The front connecting rod fixed base 17 is fixed on the support base 9 by welding, the two ends of the first push jack 16 are fixed on the front connecting rod fixed base 17 and the rear connecting rod movable base 15 respectively by welding, the rear connecting rod movable base 15 can move in the first limiting guide rail 13 along with the extension and contraction of the first push jack 16, so that the horizontal distance between the hinge joint of the front connecting rod 11, the rear connecting rod 10 and the base 9 can be changed, and the first limiting guide rail 13 is fixed on the hydraulic support base 9 by welding; the front connecting rod 11 and the rear connecting rod 10 are connected with the front connecting rod variable support 18 and the rear connecting rod variable support 14 respectively through hinges, the front connecting rod variable support 18 and the rear connecting rod variable support 14 are composed of jacks, and the extension and contraction is realized through the air supply of the air pump, along with the extension and contraction of the jack, the vertical height of the hinge joint of the front connecting rod 11, the rear connecting rod 10 and the base 9 is changed; along with the change of the horizontal and vertical distance of the hinge joint of the front connecting rod 11, the rear connecting rod 10 and the base 9, the structural parameters of the four connecting rods of the hydraulic support also change, and the diversity simulation of the structure of the hydraulic support is realized.

[0046] The rear row column socket fixing base 19 is fixed on the hydraulic support base 9 by welding, the second push-jack 20 is fixed on the rear row column socket fixing base 19 and the front row column socket movable base 21 by welding respectively, the front row column socket movable base 21 can move on the second limiting guide rail 22 along with the extension and contraction of the second push-jack 20, so as to change the distance between the front and rear row column sockets, so that different working postures of the hydraulic support can be simulated, and the second limiting guide rail 22 is fixed on the hydraulic support base 9 by welding. Thus, the state of the coal discharging mechanism of the hydraulic support when the hydraulic support is in different postures such as forward inclination, backward inclination, left and right inclination and the like, and the state of the coal caving mechanism when the top coal falls on the rear scraper conveyor 4 can be explored.

[0047] The rear connecting rod 10 comprises a sleeve, a screw rod, a clutch and a first screw rod motor 28, the first screw rod motor 28 is connected with the screw rod through the clutch, the screw rod is threadedly connected with the sleeve, the sleeve is hinged with the shield beam, and the first screw rod motor 28 and the clutch are connected with the upper computer through a controller.

[0048] The front connecting rod 11 comprises a sleeve, a screw rod, a clutch and a second screw rod motor 23, the second screw rod motor 23 is connected with the screw rod through the clutch, the screw rod is threadedly connected with the sleeve, the sleeve is hinged with the shield beam, and the second screw rod motor 23 and the clutch are connected with the upper computer through a controller.

[0049] In the embodiment, the first screw rod motor 28 and the second screw rod motor 23 are both selected to be step motors. When the clutch is in an open state, with the clockwise or counterclockwise rotation of the step motor, the screw rod and the sleeve move relatively to realize elongation or shortening, so as to change the length of the front connecting rod or the rear connecting rod of the hydraulic support. According to the rotation direction and the number of turns of the step motor, the front connecting rod or the rear connecting rod changes the corresponding length; and at this time, the length of the front connecting rod or the rear connecting rod only changes with the rotation of the step motor, and does not change with the length change of other rod members of the four connecting rods. At this time, the influence of the length change of the four connecting rods and the angle change between the four connecting rods with the length change on the running state of the coal discharging mechanism of the hydraulic support can be simulated.

[0050] When the clutch is in a closed state, the rotation of the step motor no longer changes the length of the front connecting rod or the rear connecting rod, at this time, the length of the front connecting rod or the rear connecting rod changes with the length change of other rod members of the four connecting rods, and is in a follow-up state. At this time, the influence of the length change of the four connecting rods and the angle change between the four connecting rods with the length change on the running state of the coal discharging mechanism of the hydraulic support can be simulated.

[0051] When the stepping motor controller receives the instruction of the host computer, the controller controls the opening and closing of the clutch according to the instruction, and controls the rotating direction and the rotating number of the stepping motor, so as to control the elongation or shortening of the screw sleeve by a corresponding length, realize the change of the length of the front connecting rod and the rear connecting rod, and further simulate the support with different structure parameters, so as to expand the adaptive range of the test bench and improve the reliability of the test data.

[0052] The base 9 is bolted to the upper top plate of the hydraulic support posture control device 8. The rear scraper conveyor 4 is bolted to the upper top plate of the rear scraper conveyor posture control device 5.

[0053] The shield beam 2 comprises a body, the body is provided with a rear connecting rod fixed hinged support 24, a front connecting rod movable hinged support 26, a third push-jack 25 and a third limiting guide rail 27; the rear connecting rod fixed hinged support 24 is hinged to the sleeve of the rear connecting rod 10, the front connecting rod movable hinged support 26 is hinged to the sleeve of the front connecting rod 11, the front connecting rod movable hinged support 26 is slidingly installed in the third limiting guide rail 27, the rear connecting rod fixed hinged support 24 and the front connecting rod movable hinged support 26 are connected through the third push-jack 25, and the third push-jack 25 is connected with the host computer through a controller.

[0054] The rear connecting rod fixed hinged support 24 is fixed on the shield beam body by welding and is connected with the rear connecting rod 10 through a hinge; the third push-jack 25 is fixed on the rear connecting rod fixed hinged support 24 and the front connecting rod movable hinged support 26 through welding at both ends, the front connecting rod movable hinged support 26 can move on the third limiting guide rail 27 along with the extension and contraction of the third push-jack 25, so as to change the structure of the hydraulic support four-connecting rod, and the third limiting guide rail 27 is fixed on the shield beam body by welding.

[0055] Embodiment 2:

[0056] A kind of coal drawing mechanism operating state monitoring test bench, structure as described in embodiment 1, its difference lies in: monitoring test bench further includes visual monitoring device 7, visual monitoring device 7 includes camera, image processing module and data transmission module, camera is fixedly connected on three-way holder, three-way holder is connected on tail beam 3, camera is connected host computer by image processing module, data transmission module.

[0057] The visual monitoring device 7 collects the stacking condition of the top coal on the rear scraper conveyor by the camera, and carries out sharpening, image segmentation and other basic processing on the collected pictures by the image processing module and transmits the data to the host computer, and the host computer obtains the stacking condition of the top coal on the rear scraper conveyor by further processing, and judges whether the top coal is scattered outside the rear scraper conveyor, and whether the rear conveyor is overloaded or unloaded, lightly loaded.

[0058] The designed test bench changes the structural parameters of the hydraulic support by changing the length of each rod of the four-link hydraulic support and the distance between the front and rear column pockets, realizes the function of sending instructions to the controller through the upper computer to change the structural parameters of the hydraulic support to simulate the functions of different types of supports, the hydraulic support posture control device can change the posture of the hydraulic support to simulate the forward and backward, left and right inclination of the support, the lifting and lowering of the support, and other different working conditions, and can quantitatively simulate different inclination degrees, the rear scraper conveyor posture control device can change the posture of the rear scraper conveyor to simulate different degrees of inclination and tilting of the rear scraper conveyor, further explore the influence of the relative position change of the hydraulic support and the rear scraper conveyor on the running state of the coal releasing mechanism, and the situation of the top coal falling on the rear scraper conveyor, the floor simulation device can simulate the different inclination directions and sizes of the floor of the underground fully-mechanized coal mining face by changing the extension size of different jacks in the device, and can simulate the influence of the floor on the running state of the coal releasing mechanism and the influence of the top coal falling, the visual monitoring device can monitor the running state of the coal releasing mechanism and the situation of the top coal falling on the rear scraper conveyor in real time. The different structural parameters of the hydraulic support, the different parameters of the floor, the different parameters of the hydraulic support posture control device, and the different parameters of the rear scraper conveyor posture control device are changed by the control variable method, and then the running state of the coal releasing mechanism and the situation of the top coal falling on the rear scraper conveyor in each working condition are monitored by the visual monitoring device, so as to obtain the influence of each structural parameter or working condition on the running state of the coal releasing mechanism.

[0059] Example 3:

[0060] The working method of the coal releasing mechanism running state monitoring test bench as described in Example 2, specifically includes the following steps:

[0061] The upper computer sends instructions to the controller, and the controller controls the hydraulic stand 12, the first screw motor 28, the second screw motor 23, the clutch, the first push jack 16, the second push jack 20 and the jacks of each posture adjusting device to work, so as to change the structural parameters of the hydraulic support to simulate different types of supports, change the posture of the hydraulic support to simulate different working conditions of the support, change the posture of the rear scraper conveyor to simulate different working conditions of the conveyor, and change the posture of the different top plates in the floor simulation device to simulate the influence of different working conditions of the support chassis on the running state of the coal releasing mechanism and the top coal falling situation.

[0062] The visual monitoring device monitors the running state of the coal releasing mechanism and the situation of the top coal falling on the rear scraper conveyor in each working condition, so as to obtain the influence of each structural parameter or working condition on the running state of the coal releasing mechanism.

[0063] The above merely illustrates the specific embodiments of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A test bench for monitoring the operating status of a coal feeding mechanism, characterized in that, It includes a hydraulic support, a hydraulic support attitude control device, a rear scraper conveyor, a rear scraper conveyor attitude control device, a bottom plate simulation device, a host computer, and a controller; The hydraulic support is placed on the hydraulic support attitude control device, the rear scraper conveyor is placed on the rear scraper conveyor attitude control device, and the hydraulic support attitude control device and the rear scraper conveyor attitude control device are placed on the bottom plate simulation device. The hydraulic support, hydraulic support attitude control device, rear scraper conveyor attitude control device and bottom plate simulation device are respectively connected to the host computer through the controller; The hydraulic support posture control device and the rear scraper conveyor posture control device both include an upper top plate, a lower bottom plate, and six jacks. The upper and lower ends of the six jacks are respectively connected to the upper top plate and the lower bottom plate, and the six jacks are connected to the host computer through a controller. The base plate simulation device includes four upper top plates, a lower base plate, and jacks. Each upper top plate is connected to the lower base plate through four jacks, and the jacks are connected to the host computer through a controller. The hydraulic support includes a top beam, a shield beam, a tail beam, a base, a hydraulic column, a front connecting rod, and a rear connecting rod, with the top beam, shield beam, and tail beam connected sequentially. The base is equipped with a first limiting guide rail, a second limiting guide rail, a movable base for the rear connecting rod, a fixed base for the front connecting rod, a fixed base for the rear column socket, and a movable base for the front column socket. The rear connecting rod is hinged to a variable support, the bottom end of which is connected to the movable base, which is located within the first limiting guide rail. The front connecting rod is hinged to a front... The connecting rod is a variable support. The bottom end of the front connecting rod variable support is connected to the front connecting rod fixed base. The front connecting rod fixed base and the rear connecting rod movable base are connected by a first push jack. The bottom end of the hydraulic column is connected to the rear column socket fixed base and the front column socket movable base respectively. The rear column socket fixed base and the front column socket movable base are connected by a second push jack. The front column socket movable base is set in a second limit guide rail. The first push jack and the second push jack are connected to the host computer through a controller. The rear scraper conveyor is bolted to the top plate of the rear scraper conveyor attitude control device; The monitoring test bench also includes a visual monitoring device, which includes a camera, an image processing module, and a data transmission module. The camera is fixedly connected to a three-way pan-tilt unit, which is connected to the tail beam. The camera is connected to a host computer through the image processing module and the data transmission module.

2. The coal feeding mechanism operation status monitoring test bench as described in claim 1, characterized in that, The rear connecting rod includes a sleeve, a lead screw, a clutch, and a first lead screw motor. The first lead screw motor is connected to the lead screw via the clutch. The lead screw is threadedly connected to the sleeve. The sleeve is hinged to the shield beam. The first lead screw motor and the clutch are connected to the host computer via a controller.

3. The coal feeding mechanism operation status monitoring test bench as described in claim 2, characterized in that, The front connecting rod includes a sleeve, a lead screw, a clutch, and a second lead screw motor. The second lead screw motor is connected to the lead screw via the clutch. The lead screw is threadedly connected to the sleeve. The sleeve is hinged to the shield beam. The second lead screw motor and the clutch are connected to the host computer via a controller.

4. The coal feeding mechanism operation status monitoring test bench as described in claim 3, characterized in that, The protective beam includes a main body, on which are provided a rear connecting rod fixed hinge support, a front connecting rod movable hinge support, a third pushing jack, and a third limiting guide rail; the rear connecting rod fixed hinge support is hinged to the sleeve of the rear connecting rod, the front connecting rod movable hinge support is hinged to the sleeve of the front connecting rod, the front connecting rod movable hinge support is disposed in the third limiting guide rail, the rear connecting rod fixed hinge support and the front connecting rod movable hinge support are connected by the third pushing jack, and the third pushing jack is connected to the host computer through a controller.

5. A working method for a coal feeding mechanism operation status monitoring test bench as described in any one of claims 1-4, characterized in that, Includes the following steps: The host computer sends instructions to the controller, which controls the hydraulic column, the first lead screw motor, the second lead screw motor, the clutch, the first push jack, the second push jack, and the jacks of each attitude adjustment device to perform operations. This changes the structural parameters of the hydraulic support to simulate different types of supports, changes the attitude of the hydraulic support to simulate different working conditions of the support, changes the attitude of the rear scraper conveyor to simulate different working conditions of the conveyor, and changes the attitude of different upper roof plates in the bottom plate simulation device to simulate the impact of different working conditions of the support chassis on the operating status of the coal feeding mechanism and the top coal dropping situation. The visual monitoring device monitors the operating status of the coal feeding mechanism under each working condition and the situation of the top coal falling onto the rear scraper conveyor, thereby obtaining the results of the influence of each structural parameter or working condition on the operating status of the coal feeding mechanism.

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