Heavy lifting and lowering device of fully mechanized hydraulic support

Abstract

The utility model belongs to scraper conveyor chute hoist device field discloses heavy hoist chute device of fully mechanized hydraulic support, include: the first connecting portion's just below is provided with lifting structure, just the movable end of lifting structure is connected with flexible connecting piece, and the tail end of flexible connecting piece is connected with the one end of chute away from second connecting portion, when lifting structure starts and produces the traction force upward, drives flexible connection layer to move upward, and then drags the one side of chute connection flexible connecting piece to move upward, makes the chute around the rotation connection axle of second connecting portion as the center of rotation, realizes the lifting of chute, helps to alleviate the problem of unevenness of the conveying channel caused by the fluctuation of roadway floor, local subsidence of chute or butt joint error of adjacent chute, thereby helps to reduce the risk of coal flow running resistance and scraper jam, is favorable to maintaining the continuity and stability of material transportation.

Description

Technical Field

[0001] This disclosure pertains to the field of lifting devices for scraper conveyor chutes, specifically involving heavy-duty lifting devices for fully mechanized hydraulic supports. Background Technology

[0002] Longwall top coal caving is a fully mechanized coal mining process. After the coal mining machine completes a certain distance of cutting, the hydraulic supports move forward in sequence to support the newly exposed roof. At the same time, a scraper conveyor is set between the coal mining machine and the hydraulic supports. The chute of the scraper conveyor is connected to the hydraulic supports. The thrust of the hydraulic supports drives the chute to move, which facilitates the collection of the coal cut by the coal mining machine.

[0003] Typically, one side of the chute is rotatably connected to the hydraulic support, while the other side moves along the ground due to gravity. However, when the hydraulic support moves forward, if the ground subsides, undulates, or loose hard rock blocks cut by the coal mining machine fall to the ground, the chute will come into contact with the ground, causing the chute to be obstructed from moving forward.

[0004] For example, a mining scraper conveyor chute lifting device, disclosed in CN4764063134A, is connected to the chute via a cylinder, lifting chain, and clamping legs. When the cylinder rises, it lifts the entire chute for easy lifting. However, during the drilling process of the coal mining machine, as the machine advances, the entire chute system needs to move forward accordingly. However, the underground roadway floor often has unevenness, local soft-bottom subsidence, and other issues. Furthermore, there are connection errors between adjacent chute units, which can easily lead to misalignment and bending at the joints of the moved chute, causing local unevenness in the conveying channel. Directly lifting the entire chute makes it difficult to finely and flexibly adjust the inclination angle of single or multiple chute sections, failing to effectively adapt to changes in the working face slope. Moreover, lifting the entire chute can easily cause overall instability if the hydraulic supports are moved. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this disclosure is to provide a heavy-duty hoisting device for fully mechanized hydraulic supports, which solves the problems in the prior art that the conveying channel is not smooth due to the undulation of the underground roadway floor, the local subsidence of the chute or the docking error of adjacent chutes, and the overall hoisting method is difficult to adjust the inclination angle of single or multiple chutes in a precise and flexible manner, and cannot effectively adapt to the complex slope changes of the working face.

[0006] The objective of this disclosure can be achieved through the following technical solutions:

[0007] The heavy-duty hoisting device for fully mechanized hydraulic supports includes:

[0008] The hydraulic support is provided with a first connecting part and a second connecting part at its upper and lower ends, respectively, and the second connecting part is rotatably connected to one side of the chute.

[0009] A lifting structure is provided directly below the first connecting part, and a flexible connector is connected to the movable end of the lifting structure, and the end of the flexible connector is connected to the end of the chute away from the second connecting part.

[0010] When the lifting structure is activated and generates an upward traction force, it drives the flexible connecting layer to move upward, thereby pulling one side of the chute connecting flexible connector upward, so that the chute rotates around the rotational connecting axis with the second connecting part as the center, thus lifting the chute.

[0011] In some disclosures, the lower end of the lifting structure is fixed with a connecting ring, and the connecting ring is detachably connected to the flexible connector.

[0012] In some disclosures, the connecting link includes multiple parallel connecting rods, and the two ends of the multiple connecting rods are fixed with support plates.

[0013] In some disclosures, the second connecting part includes a support seat and a rotating seat, the second connecting part is rotatably connected to the chute, and the axis of rotation between the rotating seat and the second connecting part is vertical, while the axis of rotation between the rotating seat and the chute is horizontal.

[0014] In some disclosures, a support is fixed to the side of the second connecting part near the chute, and a plurality of vertical shafts are fixed to the inner side of the support. The rotating seat includes a rotating shaft, and the rotating shaft is rotatably connected to the vertical shafts.

[0015] In some disclosures, the rotating seat further includes a support rod and a rotating shaft, with the support rod fixed to one side of the rotating shaft, and the end of the support rod away from the rotating shaft being rotatably connected to the rotating shaft.

[0016] In some disclosures, the upper end of the support base is provided with a sliding groove 332, and the sliding groove 332 is located directly above the support rod. A baffle is slidably disposed in the sliding groove 332, and the baffle is located on one side of the support rod.

[0017] In some disclosures, the upper end of the baffle is provided with a threaded groove that penetrates the baffle, and a bidirectional threaded rod is threadedly connected in the threaded groove. There are two baffles symmetrically arranged about the vertical center plane of the rotation axis, and the two baffles correspond to multiple support rods respectively. The symmetrical baffles are connected to the threaded rods with the threads facing the other direction.

[0018] In some disclosures, the upper end of the baffle is provided with a threaded groove that penetrates the baffle, and a bidirectional threaded rod is threadedly connected in the threaded groove. There are two baffles symmetrically arranged about the vertical center plane of the rotation axis, and the two baffles correspond to multiple support rods respectively. The symmetrical baffles are connected to the threaded rods with the threads facing the other direction.

[0019] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0020] A fixed connection refers to a connection in which parts or components are fixed in place and there is no relative movement between them;

[0021] A rotating connection is a connection between parts that allows the parts to rotate relative to each other.

[0022] Threaded connections are a type of detachable fixed connection with advantages such as simple structure, reliable connection, and convenient assembly and disassembly. They are widely used in mechanical engineering and connection structure fields.

[0023] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0024] The beneficial effects of this disclosure are:

[0025] 1. This device connects to one side of the chute via a lifting structure, while the other side of the chute is rotatably connected to a hydraulic support, enabling controllable lifting. This helps alleviate the problem of uneven conveying channels caused by undulations in the roadway floor, local subsidence of the chute, or misalignment between adjacent chutes. Consequently, it helps reduce the resistance to coal flow and the risk of scraper jamming, and is conducive to maintaining the continuity and stability of material transportation.

[0026] 2. The interior space of the mine is small, and after the hydraulic support moves forward, a collapse occurs behind the hydraulic support. Therefore, the chute needs to move with the hydraulic support. This application connects the lifting assembly to the upper end of the hydraulic support, which reduces the number of unnecessary support parts to adapt to the small space inside the mine. Furthermore, after both sides of the chute are connected to the hydraulic support, the movement of the chute is more stable when the hydraulic support pushes the chute to move.

[0027] 3. It adopts a vertical hinge design (composed of a vertical axis, a rotating axis, and a vertical axis). Compared with the traditional cylindrical hinge, this structure provides the chute with greater lateral freedom of movement and compound angle adjustment capability, enabling it to better adapt to the complex and uneven working conditions downhole and helping to reduce jamming and structural damage caused by excessive local resistance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure;

[0030] Figure 2 Another perspective of this disclosure is a schematic diagram of the overall structure;

[0031] Figure 3 This is a schematic diagram of the overall structure after the concealed hydraulic support is shown in an embodiment of this disclosure;

[0032] Figure 4 This is a schematic diagram of the overall structure of the base according to an embodiment of the present disclosure;

[0033] Figure 5 This is a schematic diagram of the left view of the base according to an embodiment of this disclosure;

[0034] Figure 6 This is an embodiment of the present disclosure. Figure 5 A schematic diagram of the AA cross section.

[0035] In the diagram: 1. Lifting structure; 2. Flexible connector; 3. Hydraulic support; 31. First connecting part; 32. Second connecting part; 33. Support seat; 34. Rotating seat; 313. Conversion plate; 331. Vertical shaft; 332. Slide groove; 341. Rotating shaft; 342. Support rod; 343. Rotating shaft; 4. Chute; 5. Connecting link; 51. Connecting rod; 52. Support plate; 6. Baffle; 61. Threaded groove; 7. Threaded rod. Detailed Implementation

[0036] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0037] Please refer to Figures 1 to 6 The upper and lower ends of the hydraulic support 3 are respectively provided with a first connecting part 31 and a second connecting part 32, and the second connecting part 32 is rotatably connected to one side of the chute 4.

[0038] A lifting structure 1 is provided directly below the first connecting part 31, and a flexible connector 2 is connected to the movable end of the lifting structure 1, and the end of the flexible connector 2 is connected to the end of the chute 4 away from the second connecting part 32.

[0039] When the lifting structure 1 is activated and generates an upward traction force, it drives the flexible connector 2 to move upward, thereby pulling the side of the chute 4 connected to the flexible connector 2 to move upward, so that the chute 4 rotates around the rotational connection axis with the second connection part 32 as the center, thereby lifting the chute 4.

[0040] During the material transportation process at the coal mine working face, the coal mining machine excavates tunnels in the underground roadway. The chute 4 is located between the hydraulic support 3 and the coal mining machine (not shown in the diagram). The coal drilled down by the coal mining machine falls into the chute 4 and is transported out through the chute 4. During this process, as the coal mining machine advances, the chute 4 needs to move forward along the roadway floor. The undulation of the roadway floor, the local subsidence of the chute 4, or the docking error of adjacent chutes 4 can easily cause local unevenness in the conveying channel, resulting in increased coal flow resistance, abnormal scraper operation, or even jamming. In use, the lower end of the flexible connector 2 is connected to one side of the chute 4 via a snap-fit, while the side of the chute 4 away from the flexible connector 2 is rotatably connected to the base. When the lifting structure 1 retracts upward, it drives the flexible connector 2 to move upward, thereby causing the chute 4 to be lifted upward along the rotatable connection point with the rotating seat 34. The side of the chute 4 connected to the flexible connector 2 is lifted upward. The axial length contraction of the lifting structure 1 replaces manual lifting, providing hydraulic tension. This not only significantly reduces labor intensity but also allows for precise control of the lifting height and angle of the chute 4, making it better adaptable to the complex and varied slopes and undulating terrain of the underground working face. This structure effectively reduces the impact and stress concentration at the joint of the chute 4, maintains the continuity and smoothness of the material transport channel, significantly reduces material accumulation and transport interruptions caused by misalignment of the chute 4, and improves the operational stability and overall working efficiency of the scraper conveyor.

[0041] The structure drives the flexible connector 2 to lift the chute 4 on one side through the lifting structure 1, so that the chute 4 rotates around the base hinge point, thereby realizing the flexible and controllable adjustment of the height and inclination angle of the discharge end of the chute 4, and improving the overall adaptability and stability of the conveying system under the conditions of changing slope of underground roadways and complex ground conditions.

[0042] The flexible connector 2 is a steel chain or an iron chain.

[0043] It should be noted that the lifting structure 1 includes a hydraulic cylinder and a piston rod. The body of the lifting structure 1 is prior art and will not be described in detail in this application.

[0044] The chute 4 is designed to have a range of motion of 5 to 10 degrees to prevent excessive lifting and leakage of material from the lower side of the chute 4.

[0045] Please refer to Figures 1 to 2 The lower end of the lifting structure 1 is fixed with a connecting ring 5, and the connecting ring 5 is detachably connected to the flexible connector 2.

[0046] The connecting link 5 includes multiple parallel connecting rods 51, and support plates 52 are fixed to both ends of the multiple connecting rods 51. The flexible connector 2 is connected to the connecting rods 51 on the connecting link 5, and the multiple connecting rods 51 are fixed by the support plates 52 to maintain rigid support between the multiple connecting rods 51. Since the connection between the flexible connector 2 and the connecting link 5 wears the fastest during shaking, the remaining parallel connecting rods 51 can be replaced in time after the connecting rod 51 between the connecting link 5 and the flexible connector 2 wears out, without the need to find additional tools, thus facilitating use.

[0047] The connecting ring 5 is used to connect the flexible connector 2 and the lifting structure 1. When the connecting ring 5 has multiple crossbars and longitudinal bars connecting the multiple crossbars, the crossbars are fixedly connected to the longitudinal bars. By directly connecting the flexible connector 2 to any crossbar, when the wind blows in the environment, the flexible connector 2 and the connecting ring 5 will rub against each other and cause damage to the crossbar. Different crossbars can be replaced to maintain the stability of the connection between the connecting ring 5 and the flexible connector 2. If the flexible connector 2 is directly connected to the lifting structure 1, it will be inconvenient to replace and repair it after the end connection of the lifting structure 1 is damaged during the wind. Directly replacing the lifting structure 1 will greatly increase the cost. Therefore, the connecting ring 5 can save costs and facilitate replacement.

[0048] Meanwhile, the flexible connector 2 and the connecting ring 5 can be connected by flanges or clamps, which facilitates the quick disassembly and installation of the flexible connector 2. During the shaking process, the connection between the flexible connector 2 and the connecting ring 5 wears out the fastest, and the detachable connection method makes it easy to replace the chain.

[0049] Please refer to Figures 3 to 4 The second connecting part 32 includes a support base 33 and a rotating base 34. The rotating base 34 is rotatably connected between the second connecting part 32 and the chute 4. The axis of rotation between the rotating base 34 and the second connecting part 32 is vertical, and the axis of rotation between the rotating base 34 and the chute 4 is horizontal.

[0050] A support base 33 is fixed to the side of the second connecting part 32 near the chute 4, and multiple vertical shafts 331 are fixed to the inner side of the support base 33. The rotating seat 34 includes a rotating shaft 341, and the rotating shaft 341 is rotatably connected to the vertical shafts 331. One end of the rotating seat 34 is rotatably connected to the support base 33 via the vertical shafts 331, thereby increasing the lateral degree of freedom of the rotating seat 34. Furthermore, the vertical shafts 331 are provided with multiple stress points that can increase the stress on the rotating seat 34 and the support base 33, which is beneficial to improving the stability of lateral rotation.

[0051] The support base 33 is located on the side of the base near the flexible connector 2. The vertical shaft 331 passes through the rotating shaft 341, and the two are coaxial. The rotating base 34 rotates around the central axis of the vertical shaft 331. Compared with the traditional cylindrical connecting shaft, this design increases the lateral range of motion of the chute 4, allowing the chute 4 to not only adjust its longitudinal tilt angle around the vertical shaft 331, but also to achieve a certain range of lateral deflection and compound angle adjustment. Compared with the traditional cylindrical hinge, this design significantly increases the degree of freedom of the chute 4, enabling it to better adapt to uneven or inclined ground conditions downhole, effectively avoiding jamming or structural damage caused by excessive local resistance, and improving the equipment's adaptability to complex environments and overall operational stability.

[0052] Please refer to Figures 1 to 6 The rotating seat 34 also includes a support rod 342 and a rotating shaft 343. The support rod 342 is fixed on one side of the rotating shaft 341, and the end of the support rod 342 away from the rotating shaft 341 is rotatably connected to the rotating shaft 343.

[0053] Because the upper end of the chute 4 is dragged by the flexible connector 2, and the flexible connector 2 has a weaker lateral restraint force on the chute 4 compared to the rigid connector, when the chute 4 is affected by the underground airflow, it is pushed to sway to both sides. The rotating shaft 343 is connected to the base through a parallelogram structure between multiple support rods 342, the rotating shaft 341, and the base. The ends of the support rods 342 are rotatably connected to the rotating shaft 343. The rotating shaft 343 is oriented vertically, so that the rotation direction of the support rods 342 and the rotating shaft 343 is lateral. The chute 4 is rotatably connected, allowing it to rotate around the rotating shaft 343 when one side of the chute 4 is lifted due to being dragged by the flexible connector 2. Simultaneously, because the rotating shaft 343 and the rotating shaft 341 are rotatably connected via the support rod 342, when the central axis of the rotating shaft 343 is not fixed, and under lateral thrust, such as strong winds, the support rod 342 rotates around the rotating shaft 343. This near-parallelogram linkage mechanism formed by the support rod 342, the rotating shaft 341, and the base decouples the direction of motion. When the chute 4 experiences unilateral longitudinal lifting due to uneven material distribution or fluctuations in the traction force of the flexible connector 2, the chute 4 can smoothly rotate around the vertical rotating shaft 343, effectively absorbing longitudinal displacement and preventing structural jamming or excessive stress concentration.

[0054] Please refer to Figures 1 to 6 The upper end of the support base 33 is provided with a sliding groove 332, and the sliding groove 332 is located directly above the support rod 342. A baffle 6 is slidably arranged in the sliding groove 332, and the baffle 6 is located on one side of the support rod 342.

[0055] The baffle 6 is located in the slide groove 332 and can slide along the slide groove 332. When the support rod 342 rotates to one side, it contacts the baffle 6 first. At this time, the support rod 342 cannot continue to rotate due to the contact of the baffle 6. Therefore, by changing the position between the baffle 6 and the support rod 342, the maximum angle that the support rod 342 can rotate laterally can be freely adjusted. By changing the relative position between the baffle 6 and the support rod 342, the flexibility of the angle adjustment of the support rod 342 can be improved.

[0056] Please refer to Figures 1 to 6 The upper end of the baffle 6 is provided with a threaded groove 61 that passes through the baffle 6, and a bidirectional threaded rod 7 is threadedly connected in the threaded groove 61. There are two baffles 6 symmetrically arranged about the vertical center plane of the rotation axis 343, and the two baffles 6 correspond to multiple support rods 342 respectively. The symmetrical baffles 6 are connected to the threaded rod 7 with the threaded thread in another direction.

[0057] Two baffles 6 are located on the side walls of the two support rods 342 respectively. When adjusting the position of the baffles 6, the threaded rod 7 is rotated. The two threads on the threaded rod 7 with different directions of rotation engage with the threaded grooves 61 on the two symmetrically arranged baffles 6 respectively. When the threaded rod 7 is rotated, the threaded rod 7 drives the two baffles 6 to slide towards each other through the bidirectional threads, thereby simultaneously adjusting the distance between the two baffles 6 and the support rods 342, improving the controllability of the rotation angle of the support rods 342, and further reducing the situation of lateral offset imbalance.

[0058] Please refer to Figure 2 The first connecting part 31 includes a conversion plate 313, and the upper end of the hydraulic support 3 is fixed with the conversion plate 313, which is fixedly connected to the lifting structure 1.

[0059] In use, the conversion plate 313 is fixed to the upper end of the hydraulic support 3, and one end of the lifting structure 1 is fixedly connected to the conversion plate 313. This improves the stability of the connection between the conversion plate 313 and the lifting structure 1. The staggered design of the conversion plate 313 and the base, which are not on the same vertical plane, forms a stable L-shaped force-bearing structure. When the lifting structure 1 applies a large thrust or pull, the force is first transmitted to the upper end of the hydraulic support 3 through the conversion plate 313, and then distributed to the bottom of the entire hydraulic support 3. This design avoids excessive stress concentration on a single vertical plane, and can more effectively resist the huge bending moment and torsion generated when the lifting structure 1 is working, thus enhancing the overall structural rigidity and stability.

[0060] The conversion plate 313 is a steel plate with a thickness greater than 300 mm to improve the stability between the lifting structure 1 and the hydraulic support 3.

[0061] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A heavy lifting and lowering device for a hydraulic support in a fully mechanized coal mining face, characterized in that, include: The hydraulic support (3) is provided with a first connecting part (31) and a second connecting part (32) at its upper and lower ends, respectively, and the second connecting part (32) is rotatably connected to one side of the chute (4). A lifting structure (1) is provided directly below the first connecting part (31), and a flexible connector (2) is connected to the movable end of the lifting structure (1), and the end of the flexible connector (2) is connected to the end of the chute (4) away from the second connecting part (32). When the lifting structure (1) is activated and generates an upward traction force, it drives the flexible connector (2) to move upward, thereby pulling the side of the chute (4) connected to the flexible connector (2) to move upward, so that the chute (4) rotates around the rotational connection axis with the second connection part (32) as the center, thereby lifting the chute (4).

2. The heavy-duty hoist and conveyance device for fully-mechanized hydraulic supports according to claim 1, characterized in that, The lower end of the lifting structure (1) is fixed with a connecting ring (5), and the connecting ring (5) is detachably connected to the flexible connector (2).

3. The heavy-duty hoist and pull device of the fully-mechanized hydraulic support according to claim 2, characterized in that, The connecting link (5) includes multiple parallel connecting rods (51), and the two ends of the multiple connecting rods (51) are fixed with support plates (52).

4. The heavy-duty hoist and pull device for fully-mechanized hydraulic supports according to claim 1, characterized in that, The second connecting part (32) includes a support seat (33) and a rotating seat (34). The second connecting part (32) is rotatably connected to the chute (4), and the axis of rotation between the rotating seat (34) and the second connecting part (32) is vertical, while the axis of rotation between the rotating seat (34) and the chute (4) is horizontal.

5. The heavy-duty hoist and conveyance device of the fully-mechanized coal mining hydraulic support according to claim 4, characterized in that, The second connecting part (32) has a support seat (33) fixed on the side near the chute (4), and the inner side of the support seat (33) has a plurality of vertical shafts (331) in the vertical direction. The rotating seat (34) includes a rotating shaft (341), and the rotating shaft (341) is rotatably connected to the vertical shaft (331).

6. The heavy-duty hoist and conveyance device of the fully-mechanized coal mining hydraulic support according to claim 5, characterized in that, The rotating seat (34) also includes a support rod (342) and a rotating shaft (343), and the support rod (342) is fixed on one side of the rotating shaft (341), and the end of the support rod (342) away from the rotating shaft (341) is rotatably connected to the rotating shaft (343).

7. The heavy-duty hoist and pull device of the fully-mechanized hydraulic support according to claim 6, characterized in that, The upper end of the support base (33) is provided with a sliding groove (332), and the sliding groove (332) is located directly above the support rod (342). A baffle (6) is slidably arranged in the sliding groove (332), and the baffle (6) is located on one side of the support rod (342).

8. The heavy-duty hoist and pull device of the fully-mechanized hydraulic support according to claim 7, characterized in that, The upper end of the baffle (6) is provided with a threaded groove (61) that penetrates the baffle (6), and a two-way threaded rod (7) is threadedly connected in the threaded groove (61). There are two baffles (6) symmetrically arranged about the vertical center plane of the rotation axis (343), and the two baffles (6) correspond to multiple support rods (342) respectively. The symmetrical baffles (6) are connected to the threaded rod (7) with the threaded thread facing the other direction.

9. The heavy-duty hoist and pull device for fully-mechanized hydraulic supports according to claim 5, characterized in that, The first connecting part (31) includes a conversion plate (313), and the upper end of the hydraulic support (3) is fixed with the conversion plate (313), which is fixedly connected to the lifting structure.

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