A working condition simulation type test bed for push straightness detection of a flight conveyor

Abstract

The utility model relates to a coal mine fully mechanized working face equipment detection technical field, concretely relates to a kind of working condition simulation type test bench for push linear degree detection of scraper conveyor, including rack, controllable load mechanism and the abutment of top plate adjusting mechanism, hydraulic support group and bottom plate adjusting mechanism in turn from top to bottom, bottom plate adjusting mechanism includes bottom plate assembly, lifting cylinder assembly and rotating rod, bottom plate assembly is driven hydraulic support group around Y axis rotation by lifting cylinder assembly, bottom plate assembly is driven hydraulic support group around X axis rotation by rotating rod, controllable load mechanism includes load block, load block and the push rod of hydraulic support group abut and slide on bottom plate assembly, load block is equipped with the laser collimation sensor or the pull line type displacement sensor for detecting the relative pose of multiple load blocks. By combining working condition simulation, load control and laser collimation sensor or pull line type displacement sensor, a test bench capable of accurately detecting push linear degree is constructed.

Description

Technical Field

[0001] This utility model relates to the field of equipment testing technology for fully mechanized coal mining faces, specifically to a working condition simulation test bench for testing the straightness of scraper conveyors. Background Technology

[0002] Hydraulic supports, as the core equipment of longwall mining faces, are responsible for managing the roof, maintaining support space, and advancing the working face during production. They are the main support equipment and the equipment with the most complex positional relationships in the working face. Currently, in longwall mining methods, scraper conveyors are prone to "jumping up and down" during the moving process, resulting in poor engineering quality, poor coal flow transportation, and low production efficiency.

[0003] Numerous studies have investigated the straightening of scraper conveyors, revealing that adjusting the swing of the push rod directly affects the straightness of the conveyor. However, research on testing benches for straightening is currently lacking. Therefore, there is an urgent need for a testing bench capable of simulating large inclination angles, pitching, and undulating floor conditions, and accurately detecting the straightness of the conveyor. Utility Model Content

[0004] The purpose of this invention is to provide a working condition simulation test bench for detecting the straightness of scraper conveyors, so as to solve the existing technical problems in the background art.

[0005] The technical solution provided by this utility model is as follows: a working condition simulation test bench for detecting the straightness of a scraper conveyor is provided, including a frame, a controllable load mechanism, and a top plate adjustment mechanism, a hydraulic support assembly, and a bottom plate adjustment mechanism that are sequentially connected from top to bottom. The bottom plate adjustment mechanism is connected to the bottom of the frame and includes a bottom plate assembly, a lifting cylinder assembly, and a rotating rod. The bottom plate assembly drives the hydraulic support assembly to rotate around the Y-axis through the lifting cylinder assembly, and the bottom plate assembly drives the hydraulic support assembly to rotate around the X-axis through the rotating rod. The top plate adjustment mechanism abuts against the upper surface of the top beam of the frame. The controllable load mechanism is installed on the bottom plate assembly and includes a load block. The load block abuts against the push rod of the hydraulic support assembly and slides on the bottom plate assembly. The load block is provided with a laser collimation sensor or a wire displacement sensor for detecting the relative posture of multiple load blocks.

[0006] Based on the above technical solution, the base plate assembly includes an upper base plate and a lower base plate. The lower base plate is connected to the mounting plate at the bottom of the frame via a lifting cylinder assembly. The lifting cylinder assembly includes a first lifting cylinder and a second lifting cylinder. The piston rods of the first lifting cylinder and the second lifting cylinder are hinged to opposite sides of the bottom surface of the lower base plate. The piston rods of the first lifting cylinder and the second lifting cylinder move in opposite directions and have equal displacements. The upper base plate is positioned above the lower base plate. The rotating rod extends along the X-axis and is rotatably positioned above the lower base plate. The lower part of the upper base plate is fixedly connected to the rotating rod.

[0007] Preferably, the controllable load mechanism further includes a load base and a pushing cylinder. The load base is fixedly connected to the base plate assembly. The pushing cylinder is arranged along the Y-axis direction. The cylinder body of the pushing cylinder is fixedly connected to the load base. The piston rod of the pushing cylinder is hinged to the load block.

[0008] Based on the above technical solution, the base plate adjustment mechanism further includes a sub-base plate and a connector, the controllable load mechanism further includes a dumbbell pin, the bottom of the sub-base plate is hinged to the upper base plate through the connector, multiple sub-base plates are arranged side by side along the X-axis, the hydraulic support group includes multiple hydraulic supports arranged side by side along the X-axis, each hydraulic support is respectively set on a sub-base plate and abuts against a load block, and multiple load blocks are connected in series through dumbbell pins.

[0009] Based on the above technical solution, the base plate adjustment mechanism further includes a connecting mechanism. The connecting mechanism includes a connecting plate, a first operating lever, a second operating lever, a third lifting cylinder, a fourth lifting cylinder, a first connecting rod, and a second connecting rod. Each sub-base plate has a first connecting rod and a second connecting rod connected to its side furthest from the controllable load mechanism. The first and second connecting rods are connected to opposite sides of the sub-base plate, and their bottoms are respectively connected to the second operating lever and the first operating lever. The first and second operating levers extend along the X-axis direction, and the second operating lever... The longitudinal rod is positioned between the first control lever and the hydraulic support assembly; the connecting plate is fixedly connected to the end face of the upper base plate away from the controllable load mechanism and extends along the X-axis; there are multiple third and fourth lifting cylinders, which are arranged on the connecting plate along the X-axis, and both the third and fourth lifting cylinders are positioned along the Z-axis; the first control lever is hinged to the top of the piston rod of the third lifting cylinder, and the second control lever is hinged to the top of the piston rod of the fourth lifting cylinder; the piston rods of the third and fourth lifting cylinders move in opposite directions and have equal displacements.

[0010] Preferably, the hydraulic support base is equipped with two first laser rangefinders, the first lifting cylinder and the second lifting cylinder are respectively equipped with second laser rangefinders for measuring the lifting distance of the piston rod of the lifting cylinder, and the push cylinder is equipped with a pressure sensor.

[0011] Preferably, the top plate adjustment mechanism includes a top plate lifting cylinder, a top plate, a pressure plate, a positioning pin, and a connecting component. The cylinder body of the top plate lifting cylinder is fixedly connected to the frame. The piston rod of the top plate lifting cylinder drives the top plate to move along the Z-axis direction on the frame through the connecting component. The pressure plate is fixedly connected to the bottom of the top plate. The frame is provided with top plate positioning holes adapted to the positioning pin. Multiple top plate positioning holes are provided along the Z-axis direction. The top plate is provided with pin holes adapted to the positioning pin. The positioning pin connects the top plate to the frame by sequentially inserting into the pin holes and the top plate positioning holes.

[0012] Preferably, both the first and second control levers are provided with sliding grooves, the sliding grooves are inverted T-shaped, and the bottoms of the first and second connecting rods are provided with inverted T-shaped sliders, which are engaged in the sliding grooves and slide within the sliding grooves.

[0013] The beneficial effects of the technical solution provided by this utility model are as follows: (1) By combining working condition simulation, load control and laser collimation sensor or wire displacement sensor, a test bench that can accurately detect the straightness of the push is constructed.

[0014] (2) The bottom plate adjustment mechanism simulates a large-angle working face and various complex working conditions such as downward mining and upward mining, and the laser rangefinder is used to achieve precise control of the working face angle.

[0015] (3) Multiple independent sub-base plates are hinged to the upper base plate. By adjusting the deflection state of each sub-base plate, the uneven working surface in the coal mine can be effectively simulated, providing a more realistic test environment for the performance test of hydraulic supports under different terrain conditions.

[0016] (4) By equipping each hydraulic support with an independent and controllable load block and using a pressure sensor to precisely control the load size, the actual working conditions of the scraper conveyor during the pushing and shifting process are simulated more realistically, which significantly improves the accuracy and reliability of the test data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram showing the connection between the hydraulic support assembly and the base plate of this utility model; Figure 4 This is a schematic diagram of the base plate adjustment mechanism of this utility model; Figure 5 This is a schematic diagram of the controllable load mechanism of this utility model; Figure 6 This is a schematic diagram of the structure of the first connecting rod of this utility model; Figure 7 This is a schematic diagram of the structure of the second connecting rod of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figures 1 to 7 As shown, a working condition simulation test bench for detecting the straightness of a scraper conveyor includes a frame 1, a controllable load mechanism, and a top plate adjustment mechanism, a hydraulic support group, and a bottom plate adjustment mechanism that are sequentially connected from top to bottom.

[0021] The top plate adjustment mechanism abuts against the upper surface of the top beam of the frame 1. Specifically, the top plate adjustment mechanism includes a top plate lifting cylinder 21, a top plate 23, a pressure plate 24, a positioning pin 25, and a connecting piece 22. Four top plate lifting cylinders 21 are provided, and their cylinder bodies are respectively fixedly mounted on the four top beams of the frame 1. The piston rod of the top plate lifting cylinder 21 drives the top plate 23 to move along the Z-axis direction on the frame 1 through the connecting piece 22. The pressure plate 24 is fixedly connected to the bottom of the top plate 23 for transmitting load. Multiple top plate positioning holes 11 adapted to the positioning pin 25 are provided along the Z-axis direction on the top beam of the frame 1. The top plate 23 is provided with pin holes adapted to the positioning pin 25. When the piston rod of the top plate lifting cylinder 21 moves to the designated position, the positioning pin 25 connects the top plate 23 to the frame 1 by sequentially inserting into the pin holes and the top plate positioning holes 11, thereby achieving stable application of top load to the hydraulic support assembly.

[0022] The controllable load mechanism is mounted on the base plate assembly. It primarily applies load to the push rod and simulates a scraper conveyor, serving as an object for straightening inspection. The controllable load mechanism includes a load base 7, a pushing cylinder 61, a load block 62, and a dumbbell pin 63. The load base 7 is fixedly connected to the upper base plate 41. The pushing cylinder 61 is arranged along the Y-axis, with its cylinder body fixedly connected to the load base 7. The piston rod of the pushing cylinder 61 is hinged to one end of the load block 62, and the other end of the load block 62 abuts against the push rod of the hydraulic support 3. Multiple load blocks 62 are arranged along the X-axis, each corresponding to one pushing cylinder 61 and one push rod of the hydraulic support 3. Multiple load blocks 62 are connected in series via dumbbell pins 63. While the push rod moves the load block 62, the push cylinder 61 applies a load to the load block 62. By changing the flow rate of the push cylinder 61, the magnitude of the thrust applied to the load block 62 is changed, thereby changing the magnitude of the load.

[0023] In the initial state, fluid enters the rodless chamber of the push cylinder 61, pushing the piston rod to fully extend, thus completely pushing out the load block 62. The load block 62 connects to the push rod of the hydraulic support 3. Simultaneously, the hydraulic circuit flow rate is changed to determine the thrust applied to the load block 62 by the push cylinder 61, thereby obtaining the load that the push rod needs to push. After preparation, the top plate 23 is pressed down to fix the hydraulic support 3, and the hydraulic support 3 begins to push, moving the load block 62. When the pushing is complete, the piston rod of the push cylinder 61 is fully retracted. At this time, fluid enters the rod chamber, fixing the load block 62, and the hydraulic support 3 can perform the moving action.

[0024] The load block 62 is equipped with a laser collimation sensor or a wire displacement sensor for detecting the relative pose of multiple load blocks 62. The curve of the pose of the load block 62 is used to provide a reference for the movement of the hydraulic support, and can also be used to detect the straightness of multiple load blocks.

[0025] The base plate adjustment mechanism is connected to the bottom of the frame 1. The base plate adjustment mechanism includes a base plate assembly, a lifting cylinder assembly, and a rotating rod 44. The base plate assembly drives the hydraulic support assembly to rotate around the Y-axis via the lifting cylinder assembly, and the base plate assembly drives the hydraulic support assembly to rotate around the X-axis via the rotating rod 44, thereby simulating the working conditions of a large-angle working face and the downward and upward mining operations of the hydraulic support 3. Specifically, the base plate assembly includes an upper base plate 41 and a lower base plate 42. The lower base plate 42 is connected to the mounting plate at the bottom of the frame 1 via the lifting cylinder assembly. The lifting cylinder assembly includes a first lifting cylinder 45 and a second lifting cylinder 46. The piston rods of the first lifting cylinder 45 and the second lifting cylinder 46 are hinged to opposite sides of the bottom surface of the lower base plate 42. Multiple first lifting cylinders 45 and second lifting cylinders 46 can be provided. The piston rods of the first lifting cylinder 45 and the second lifting cylinder 46 move in opposite directions and have equal displacements, thereby enabling the base plate assembly to rotate around the Y-axis and also providing support for the base plate assembly. The first lifting cylinder 45 and the second lifting cylinder 46 move simultaneously, with identical lifting and lowering distances. Each of the first and second lifting cylinders is equipped with a second laser rangefinder for measuring the lifting distance of the piston rod. This measurement of the piston rod's lifting distance allows for precise sensing and control of its tilt angle. The upper base plate 41 is positioned above the lower base plate 42. The rotating rod 44 extends along the X-axis and is rotatably positioned above the lower base plate 42. The lower part of the upper base plate 41 is fixedly connected to the rotating rod 44, enabling the base plate assembly to drive the hydraulic support assembly to rotate around the X-axis.

[0026] The base plate adjustment mechanism also includes a sub-base plate 43, a connector 47, and a connecting mechanism. The bottom of the sub-base plate 43 is hinged to the upper base plate 41 via the connector 47, ensuring its freedom of rotation around the Y-axis and providing support. Multiple sub-base plates 43 are arranged side-by-side along the X-axis. The hydraulic support assembly includes multiple hydraulic supports 3 arranged side-by-side along the X-axis. Each hydraulic support 3 is mounted on one sub-base plate 43 and abuts against one load block 62. The connecting mechanism includes a connecting plate 57, a first operating lever 51, a second operating lever 53, a third lifting cylinder 52, a fourth lifting cylinder 54, a first connecting rod 55, and a second connecting rod 56. Each sub-base plate 43 has a first connecting rod 55 and a second connecting rod 56 connected to the side furthest from the controllable load mechanism. The first connecting rod 55 and the second connecting rod 56 are connected to opposite sides of the sub-base plate 43. The bottoms of the first connecting rod 55 and the second connecting rod 56 are respectively connected to the second operating lever 53 and the first operating lever 51. The first operating lever 51 and the second operating lever 53 extend along the X-axis direction, and the second operating lever 53 is located at the first... A control lever 51 is connected to a hydraulic support assembly; the connecting plate 57 is fixedly connected to the end face of the upper base plate 41 away from the controllable load mechanism and extends along the X-axis; there are multiple third lifting cylinders 52 and fourth lifting cylinders 54, arranged along the X-axis on the connecting plate 57, and both the third lifting cylinders 52 and fourth lifting cylinders 54 are set along the Z-axis. The first control lever 51 is hinged to the top of the piston rod of the third lifting cylinder 52, and the second control lever 53 is hinged to the top of the piston rod of the fourth lifting cylinder 54. The piston rods of the third lifting cylinder 52 and the fourth lifting cylinder 54 move in opposite directions and have equal displacements. Since the first connecting rod 55 and the second connecting rod 56 will move when the sub-base plate 43 deflects, the first control lever 51 and the second control lever 53 are both provided with sliding grooves. The sliding grooves are inverted T-shaped, and the bottoms of the first connecting rod 55 and the second connecting rod 56 are provided with inverted T-shaped sliders. The inverted T-shaped sliders are engaged in the sliding grooves and slide within the sliding grooves. This ensures that the connecting rod can slide on the control lever, and also facilitates the machining of the control lever and the installation of the connecting rod.

[0027] When the third lifting cylinder 52 controls the first control lever 51 to rise or fall, it will drive all the second connecting rods 56 connected to the first control lever 51 to rise or fall. At the same time, the second control lever 53 will rise or fall in the opposite direction, which will also drive all the first connecting rods 55 connected to the second control lever 53 to rise or fall, thereby causing the sub-base plate 43 to rotate around the Y-axis. The connection positions of each sub-base plate 43 and the control lever can be changed as needed. By adjusting the deflection state of each sub-base plate 43, the uneven working surface of the underground coal mine can be effectively simulated, providing a more realistic test environment for testing the working performance of hydraulic supports under different terrain conditions.

[0028] The hydraulic support 3 is equipped with two first laser rangefinders on its base. The distance detected by the two first laser rangefinders at a predetermined position is used to calculate the movement distance of the push rod at a specific position, and then convert it into the rotation angle of the push rod. The pushing cylinder 61 is equipped with a pressure sensor to detect the magnitude of the thrust applied by the pushing cylinder 61 to the load block 62, and then combine it with the bearing area of ​​the load block 62 to obtain the load size.

[0029] The foregoing has shown and described the basic principles and main features of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims within this utility model.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A working condition simulation test bench for detecting the straightness of a scraper conveyor, characterized in that, The system includes a frame (1), a controllable load mechanism, and a top plate adjustment mechanism, a hydraulic support assembly, and a bottom plate adjustment mechanism that are connected sequentially from top to bottom. The bottom plate adjustment mechanism is connected to the bottom of the frame (1). The bottom plate adjustment mechanism includes a bottom plate assembly, a lifting cylinder assembly, and a rotating rod (44). The bottom plate assembly drives the hydraulic support assembly to rotate around the Y-axis through the lifting cylinder assembly. The bottom plate assembly drives the hydraulic support assembly to rotate around the X-axis through the rotating rod (44). The top plate adjustment mechanism abuts against the upper surface of the top beam of the frame (1). The controllable load mechanism is installed on the bottom plate assembly. The controllable load mechanism includes a load block (62). The load block (62) abuts against the push rod of the hydraulic support assembly and slides on the bottom plate assembly. The load block (62) is provided with a laser collimation sensor or a wire displacement sensor for detecting the relative posture of multiple load blocks (62).

2. The working condition simulation test bench for detecting the straightness of a scraper conveyor as described in claim 1, characterized in that, The base plate assembly includes an upper base plate (41) and a lower base plate (42). The lower base plate (42) is connected to the mounting plate at the bottom of the frame (1) via a lifting cylinder assembly. The lifting cylinder assembly includes a first lifting cylinder (45) and a second lifting cylinder (46). The piston rods of the first lifting cylinder (45) and the second lifting cylinder (46) are hinged to opposite sides of the bottom surface of the lower base plate (42). The piston rods of the first lifting cylinder (45) and the second lifting cylinder (46) move in opposite directions and have equal displacements. The upper base plate (41) is positioned above the lower base plate (42). The rotating rod (44) extends along the X-axis and is rotatably positioned above the lower base plate (42). The lower part of the upper base plate (41) is fixedly connected to the rotating rod (44).

3. The working condition simulation test bench for detecting the straightness of a scraper conveyor as described in claim 2, characterized in that, The controllable load mechanism also includes a load base (7) and a push cylinder (61). The load base (7) is fixedly connected to the base plate assembly. The push cylinder (61) is arranged along the Y-axis direction. The cylinder body of the push cylinder (61) is fixedly connected to the load base (7). The piston rod of the push cylinder (61) is hinged to the load block (62).

4. The working condition simulation test bench for detecting the straightness of a scraper conveyor as described in claim 3, characterized in that, The base plate adjustment mechanism also includes a sub-base plate (43) and a connector (47). The controllable load mechanism also includes a dumbbell pin (63). The bottom of the sub-base plate (43) is hinged to the upper base plate (41) through the connector (47). Multiple sub-base plates (43) are arranged side by side along the X-axis. The hydraulic support group includes multiple hydraulic supports (3) arranged side by side along the X-axis. Each hydraulic support (3) is set on a sub-base plate (43) and abuts against a load block (62). Multiple load blocks (62) are connected in series through dumbbell pins (63).

5. A working condition simulation test bench for detecting the straightness of a scraper conveyor according to claim 4, characterized in that, The base plate adjustment mechanism also includes a connecting mechanism, which includes a connecting plate (57), a first operating lever (51), a second operating lever (53), a third lifting cylinder (52), a fourth lifting cylinder (54), a first connecting rod (55), and a second connecting rod (56). Each sub-base plate (43) is connected to the first connecting rod (55) and the second connecting rod (56) on the side furthest from the controllable load mechanism. The first connecting rod (55) and the second connecting rod (56) are connected to opposite sides of the sub-base plate (43). The bottoms of the first connecting rod (55) and the second connecting rod (56) are respectively connected to the second operating lever (53) and the first operating lever (51). The first operating lever (51) and the second operating lever (53) extend along the X-axis direction. The second control lever (53) is located between the first control lever (51) and the hydraulic support assembly; the connecting plate (57) is fixedly connected to the end face of the upper base plate (41) away from the controllable load mechanism and extends along the X-axis; there are multiple third lifting cylinders (52) and fourth lifting cylinders (54), which are arranged along the X-axis on the connecting plate (57). Both the third lifting cylinder (52) and the fourth lifting cylinder (54) are arranged along the Z-axis. The first control lever (51) is hinged to the top of the piston rod of the third lifting cylinder (52), and the second control lever (53) is hinged to the top of the piston rod of the fourth lifting cylinder (54). The piston rods of the third lifting cylinder (52) and the fourth lifting cylinder (54) move in opposite directions and have equal displacements.

6. A working condition simulation test bench for detecting the straightness of a scraper conveyor according to claim 3, characterized in that, The hydraulic support (3) base is equipped with two first laser rangefinders, and the first lifting cylinder (45) and the second lifting cylinder (46) are respectively equipped with second laser rangefinders for measuring the lifting distance of the piston rod of the lifting cylinder. The push cylinder (61) is equipped with a pressure sensor.

7. A working condition simulation test bench for detecting the straightness of a scraper conveyor according to claim 1, characterized in that, The top plate adjustment mechanism includes a top plate lifting cylinder (21), a top plate (23), a pressure plate (24), a positioning pin (25), and a connector (22). The cylinder body of the top plate lifting cylinder (21) is fixedly connected to the frame (1). The piston rod of the top plate lifting cylinder (21) drives the top plate (23) to move along the Z-axis direction on the frame (1) through the connector (22). The pressure plate (24) is fixedly connected to the bottom of the top plate (23). The frame (1) is provided with a top plate positioning hole (11) that matches the positioning pin (25). Multiple top plate positioning holes (11) are provided along the Z-axis direction. The top plate (23) is provided with a pin hole that matches the positioning pin (25). The positioning pin (25) connects the top plate (23) to the frame (1) by sequentially inserting the pin hole and the top plate positioning hole (11).

8. A working condition simulation test bench for detecting the straightness of a scraper conveyor according to claim 5, characterized in that, The first control lever (51) and the second control lever (53) are both provided with sliding grooves. The sliding grooves are inverted T-shaped. The bottom of the first connecting rod (55) and the second connecting rod (56) are both provided with inverted T-shaped sliders. The inverted T-shaped sliders are engaged in the sliding grooves and slide within the sliding grooves.

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