Bottom adjusting device and hydraulic support

Abstract

The utility model relates to the technical field of hydraulic supports, in particular to a bottom adjusting device and a hydraulic support, and the bottom adjusting device comprises a bottom adjusting jack arranged between bases of the two hydraulic supports; the connecting block is inserted into the base through the first mounting hole; the first mounting hole is formed in an inner main rib plate of the base; the two ends of the bottom adjusting jack are connected with the connecting blocks through connectors respectively. The connector comprises a first U-shaped opening and a second U-shaped opening, and the first U-shaped opening is hinged to the bottom adjusting jack through a first pin shaft; the second U-shaped opening is hinged to the connecting block through a second pin shaft. The detachable connecting block is arranged on the inner side of the base, the position of the bottom adjusting jack is adjusted to the inner side of the support base main rib from the top end of the base, the assembling height of the bottom adjusting jack is reduced, the position better conforms to human engineering, workers do not need to climb over deliberately during walking and only need to walk normally, and the safety of the workers is improved.

Description

Technical Field

[0001] This application relates to the field of hydraulic support technology, and in particular to a bottom adjustment device and a hydraulic support. Background Art

[0002] Advanced hydraulic supports are a type of support equipment used in underground coal mining. They are typically placed in underground machine roadways and ventilation roadways for support. Since advanced hydraulic supports located in ventilation roadways do not require transfer machines between the left and right sides, bottom adjustment jacks are usually installed at the base as bottom adjustment mechanisms to facilitate the adjustment of the position of the advanced hydraulic supports.

[0003] However, the traditional hydraulic support adjustment mechanism for ventilation tunnels is usually located above the base, which is high up. When pedestrians pass by, they need to deliberately climb over it, which may pose a safety hazard to the staff. Utility Model Content

[0004] This application aims to at least address one of the technical problems of the traditional ventilation tunnel advanced hydraulic support bottom adjustment mechanism, which is usually located above the base, at a high position, requiring pedestrians to deliberately climb over it, potentially posing a safety hazard to workers.

[0005] To address this, this application provides a bottom adjustment device. By providing a detachable connecting block inside the base, the position of the bottom adjustment jack is adjusted from the top of the base to the inside of the main rib of the support base. This reduces the assembly height of the bottom adjustment jack, making its position more ergonomic. Workers do not need to deliberately climb over it when walking; they can simply walk normally, thus improving worker safety. The bottom adjustment jack of the base is usually used in conjunction with the top beam adjustment jack. By reducing the height of the bottom adjustment jack, the distance between it and the top beam adjustment jack can be increased, resulting in a more reasonable stress distribution on the support during adjustment.

[0006] This application also provides a hydraulic support including the aforementioned bottom adjustment device.

[0007] A bottom adjustment device according to a first aspect embodiment of this application includes: a bottom adjustment jack disposed between the bases of two hydraulic supports; a connecting block inserted into the base through a first mounting hole; the first mounting hole being disposed on the inner main rib plate of the base; both ends of the bottom adjustment jack being connected to the connecting block through connecting heads; the connecting head including a first U-shaped opening and a second U-shaped opening, the first U-shaped opening being hinged to the bottom adjustment jack through a first pin; and the second U-shaped opening being hinged to the connecting block through a second pin.

[0008] Optionally, the first U-shaped opening and the second U-shaped opening are orthogonally arranged. The first U-shaped opening is used to provide the bottom-adjusting jack with a vertical degree of freedom, and the second U-shaped opening is used to provide the bottom-adjusting jack with a horizontal degree of freedom.

[0009] Optionally, the base is provided with a first limiting plate and a second limiting plate, which are located above and below the connecting block, respectively. The first limiting plate and the second limiting plate together with the surrounding base stiffeners form a box to accommodate the connecting block.

[0010] Optionally, the connecting block can be detachably connected to the base via a fixing mechanism.

[0011] Optionally, the fixing mechanism is a first locking pin, which is inserted into the connecting block through a second mounting hole; the second mounting hole is set on the upper main stiffening plate of the base.

[0012] Optionally, the first locking pin is provided with a first U-shaped clip.

[0013] Optionally, the fixing mechanism is a second locking pin, which is inserted into the tail end of the connecting block; the tail end of the connecting block protrudes from the third mounting hole, which is set on the outer main stiffening plate of the base.

[0014] Optionally, a second U-shaped clip is provided on the second locking pin.

[0015] Optionally, the height difference between the lower edge of the bottom-adjusting jack and the bottom of the base is 0.1-0.3 meters.

[0016] The second aspect of this application provides a hydraulic support with the aforementioned bottom adjustment device. Since the bottom adjustment device has the aforementioned technical effects, the hydraulic support with the bottom adjustment device should also have the corresponding technical effects.

[0017] One of the above technical solutions has at least the following advantages or beneficial effects:

[0018] The present application provides a bottom adjustment device and hydraulic support. The bottom adjustment device includes: a bottom adjustment jack, disposed between the bases of two hydraulic supports; a connecting block, inserted into the base through a first mounting hole; the first mounting hole is disposed on the inner main rib plate of the base; both ends of the bottom adjustment jack are connected to the connecting block through connecting heads; the connecting head includes a first U-shaped opening and a second U-shaped opening, the first U-shaped opening being hinged to the bottom adjustment jack through a first pin; the second U-shaped opening being hinged to the connecting block through a second pin. By providing a detachable connecting block on the inner side of the base, the position of the bottom adjustment jack is adjusted from the top of the base to the inner side of the main rib of the support base, reducing the assembly height of the bottom adjustment jack and making its position more ergonomic. Workers do not need to deliberately climb over it when walking, but can simply walk normally, improving the safety of workers. The bottom adjustment jack of the base is usually used in conjunction with the top beam adjustment jack. By reducing the height of the bottom adjustment jack, the distance between it and the top beam adjustment jack can be increased, making the force on the support more reasonable during adjustment. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This illustration shows one of the structural schematic diagrams of a bottom-adjustment device provided in an embodiment of this application;

[0021] Figure 2 This is a second schematic diagram of the structure of a bottom-adjustment device provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram of the connector structure provided in an embodiment of this application is shown;

[0023] Figure 4 A schematic diagram of the structure of the second locking pin provided in an embodiment of this application is shown;

[0024] Figure 5 A schematic diagram of the structure of the traditional ventilation tunnel advanced hydraulic support bottom adjustment mechanism is shown.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Adjust the jack at the bottom.

[0027] 2. Connector; 21. First U-shaped opening; 22. Second U-shaped opening; 23. First pin; 24. Second pin.

[0028] 3. Connecting block,

[0029] 4. Fixing mechanism; 41. First locking pin; 42. First U-shaped clip; 43. Second locking pin; 44. Second U-shaped clip.

[0030] 5. Base; 51. First mounting hole; 52. Second mounting hole; 53. Inner main stiffening plate; 54. Upper main stiffening plate; 55. First limiting plate; 56. Second limiting plate; 57. Third mounting hole; 58. Outer main stiffening plate. DETAILED DESCRIPTION

[0031] To better explain and facilitate understanding of this application, a detailed description of the application is provided below with reference to the accompanying drawings and specific embodiments. The directional terms such as "upper," "lower," "inner," and "outer" mentioned herein are used in conjunction with... Figure 1 The orientation is used as a reference. The position of the upper main stiffening plate 54 relative to the bottom adjusting jack 1 is defined as "upper"; the position of the connecting block 3 relative to the base 5 is defined as "inner".

[0032] As mentioned above, underground ventilation tunnels in coal mines, also known as return air tunnels, are an important component of the mine ventilation system, possessing unique structures and functions. Ventilation tunnels are typically characterized by their long and narrow spaces, complex structures, and difficult maintenance. Because they are located deep underground and are subject to long-term effects from geological changes, groundwater erosion, and other natural factors, they require support and reinforcement to ensure structural integrity and smooth ventilation.

[0033] Advanced hydraulic supports, also known as advanced hydraulic supports, are support structures installed in ventilation roadways and controlled and operated via a hydraulic system. Utilizing hydraulic principles, they employ a hydraulic pump station to provide power, ensuring close contact between the support's top beam and the roadway roof, thereby providing support and protection for the roadway. During coal mining, as the working face advances, the roof of the ventilation roadway may be affected by mine pressure, leading to subsidence or collapse. In such cases, advanced hydraulic supports play a crucial role in providing support and protection, ensuring the stability and safety of the roadway.

[0034] However, the traditional hydraulic support adjustment mechanism for ventilation tunnels is usually located above the base, such as... Figure 5 As shown, the location is high up, and pedestrians need to deliberately climb over it when passing by, which may pose a safety hazard to staff.

[0035] To address at least one of the technical problems existing in the prior art or related technologies, this application provides a bottom adjustment device and a hydraulic support. The bottom adjustment device includes: a bottom adjustment jack, disposed between the bases of two hydraulic supports; a connecting block, inserted into the base through a first mounting hole; the first mounting hole is disposed on the inner main rib plate of the base; both ends of the bottom adjustment jack are connected to the connecting block through connecting heads; the connecting head includes a first U-shaped opening and a second U-shaped opening, the first U-shaped opening being hinged to the bottom adjustment jack through a first pin; the second U-shaped opening being hinged to the connecting block through a second pin. By providing a detachable connecting block on the inner side of the base, the position of the bottom adjustment jack is adjusted from the top of the base to the inner side of the main rib of the support base, reducing the assembly height of the bottom adjustment jack and making its position more ergonomic. Workers do not need to deliberately climb over it when walking, but can simply walk normally, improving worker safety. The bottom adjustment jack of the base is usually used in conjunction with the top beam adjustment jack. By reducing the height of the bottom adjustment jack, the distance between it and the top beam adjustment jack can be increased, resulting in more reasonable force distribution on the support during adjustment.

[0036] The following description, with reference to the accompanying drawings, describes some embodiments of the under-conditioning apparatus provided in this application.

[0037] See Figures 1 to 4The first aspect of this application provides a bottom adjustment device, comprising: a bottom adjustment jack 1, disposed between bases 5 of two hydraulic supports; a connecting block 3, inserted into the base 5 through a first mounting hole 51; the first mounting hole 51 is disposed on the inner main rib plate 53 of the base 5; the two ends of the bottom adjustment jack 1 are respectively connected to the connecting block 3 through connecting heads 2; the connecting head 2 includes a first U-shaped opening 21 and a second U-shaped opening 22, the first U-shaped opening 21 is hinged to the bottom adjustment jack 1 through a first pin 23; the second U-shaped opening 22 is hinged to the connecting block 3 through a second pin 24.

[0038] The hydraulic supports for ventilation tunnels are arranged in two rows, such as... Figure 2 As shown, the bottom-adjusting jack 1 is positioned between the base 5 of the left hydraulic support and the base 5 of the right hydraulic support. The first mounting hole 51 is a square hole opened on the inner main stiffening plate 53 of the base 5. The cross-section of the square hole is slightly larger than the cross-section of the connecting block 3, allowing the connecting block 3 to be inserted into the base 5. The connecting block 3 can be made from ordinary steel plate, resulting in very low manufacturing costs. The two ends of the bottom-adjusting jack 1, namely the cylinder bottom end and the piston rod end, are connected to the connecting block 3 via connecting heads 2. This design adjusts the position of the bottom-adjusting jack 1 from the top of the base 5 to the inside of the main rib of the support base, reducing the assembly height of the bottom-adjusting jack 1 and making its position more ergonomic. Workers do not need to deliberately climb over it when walking, and can simply walk normally, improving worker safety. The space directly above the base 5 is freed up to accommodate more hydraulic valves and hoses, making the hydraulic system more efficient. The bottom-adjusting jack 1 is usually used in conjunction with the top beam adjusting jack. By lowering the height of the bottom-adjusting jack 1, the distance between it and the top beam adjusting jack is increased, resulting in more reasonable force distribution on the support during adjustment. At the same time, adjusting the position of the bottom-adjusting jack 1 from the top of the base 5 to the inside of the main rib of the support base shortens the overall length of the bottom-adjusting jack 1 while ensuring its normal operating stroke, thus reducing manufacturing costs.

[0039] In one illustrative embodiment, such as Figure 3 As shown, the first U-shaped opening 21 and the second U-shaped opening 22 are orthogonally arranged. The first U-shaped opening 21 is used to provide the bottom-adjusting jack 1 with a vertical degree of freedom, and the second U-shaped opening 22 is used to provide the bottom-adjusting jack 1 with a horizontal degree of freedom.

[0040] The first U-shaped opening 21 and the second U-shaped opening 22 are orthogonally arranged, indicating that their arrangement is perpendicular, meaning the major axis of one opening forms a 90° angle with the major axis of the other. Since the first U-shaped opening 21 is hinged to the bottom-adjusting jack 1, when the two supports have a height difference due to uneven ground, the bottom-adjusting jack 1 can move vertically, meaning it has a degree of freedom in the vertical direction (perpendicular to the ground). Similarly, since the second U-shaped opening 22 is hinged to the connecting block 3, when the two supports move forward and create a displacement difference, the bottom-adjusting jack 1 can move horizontally, meaning it has a degree of freedom in the horizontal direction (parallel to the ground). This design effectively protects the bottom-adjusting jack 1 during support movement. When the two supports encounter unexpected resistance during movement, such as gravel on the ground, a sudden height or displacement difference may occur between the two supports. Without sufficient degrees of freedom to cushion these forces, the bottom-adjusting jack 1 could be damaged by sudden excessive stress. By providing degrees of freedom, the bottom-adjusting jack 1 can adapt to these changes without generating excessive stress, thereby extending its service life.

[0041] In one illustrative embodiment, the base 5 is provided with a first limiting plate 55 and a second limiting plate 56, which are located above and below the connecting block 3, respectively. The first limiting plate 55 and the second limiting plate 56, together with the surrounding base ribs, form a box to accommodate the connecting block 3.

[0042] The first limiting plate 55 and the second limiting plate 56 limit the vertical movement range of the connecting block 3. The box structure formed by the first limiting plate 55, the second limiting plate 56, and the surrounding base stiffeners confines the connecting block 3 within a specific space. This not only ensures that the connecting block 3 maintains the correct position and orientation during operation but also prevents it from detaching or being damaged due to external forces. At the same time, the box structure also increases the local strength and rigidity of the base 5, enabling it to withstand the pulling force of the bottom adjusting jack 1.

[0043] In one illustrative embodiment, the connecting block 3 is detachably connected to the base 5 via a fixing mechanism 4. The fixing mechanism 4 ensures a secure connection between the connecting block 3 and the base 5 while allowing for disassembly when needed, facilitating maintenance and parts replacement.

[0044] In one illustrative embodiment, such as Figure 2 As shown, the fixing mechanism 4 is the first locking pin 41, which is inserted into the connecting block 3 through the second mounting hole 52; the second mounting hole 52 is set on the upper main stiffening plate 54 of the base 5.

[0045] The connecting block 3 is provided with a socket designed to mate with the first locking pin 41. The position, size, and shape of the socket match the first locking pin 41 to ensure that they can be tightly connected together. The first locking pin 41 is vertically inserted into the socket of the connecting block 3 from the second mounting hole 52. When the first locking pin 41 is fully inserted and fixed in place, a solid connection point will be formed between the connecting block 3 and the base 5. This connection method has high strength and stability, can withstand large tensile forces and vibrations, and is also easy to disassemble and reassemble.

[0046] In one illustrative embodiment, a first U-shaped clip 42 is provided on the first locking pin 41. The first U-shaped clip 42 is located at the top of the first locking pin 41, above the second mounting hole 52. The first U-shaped clip 42 provides an additional locking mechanism to prevent the first locking pin 41 from accidentally slipping out of the socket, thereby ensuring a secure connection between the connecting block 3 and the base 5; at the same time, the elasticity of the U-shaped clip 42 can resist external vibrations, further ensuring the reliability of the connection. The U-shaped clip 42 has an open U-shaped structure whose size and shape match the top of the first locking pin 41, providing appropriate clamping force when locked. When the U-shaped clip 42 is in the locked position, it is locked by an elastic deformation mechanism, thereby preventing the first locking pin 41 from moving.

[0047] In one illustrative embodiment, such as Figure 4 As shown, the fixing mechanism 4 is the second locking pin 43, which is inserted into the tail end of the connecting block 3; the tail end of the connecting block 3 protrudes from the third mounting hole 57, which is set on the outer main stiffening plate 58 of the base 5.

[0048] The third mounting hole 57 corresponds to the first mounting hole 51. The connecting block 3 is inserted into the first mounting hole 51, and the tail end of the connecting block 3 protrudes from the third mounting hole 57. The tail end of the connecting block 3 has an insertion hole, and the second locking pin 43 is inserted into the insertion hole at the tail end of the connecting block 3, connecting the connecting block 3 and the base 5 together. It can be understood that since the first locking pin 41 is inserted from the upper main stiffening plate 54, the connecting block 3 can be designed to be relatively short; while the second locking pin 43 is inserted from the outer main stiffening plate 58 side, therefore, the connecting block 3 can be designed to be relatively long. This connection method is simple to operate and provides high strength and stability.

[0049] In one illustrative embodiment, the second locking pin 43 is provided with a second U-shaped clip 44. The second U-shaped clip 44 can be positioned above and below the contact point between the second locking pin 43 and the connecting block 3, which can prevent the second locking pin 43 from accidentally sliding out of the socket.

[0050] In one illustrative embodiment, the height difference between the lower edge of the bottom-adjusting jack 1 and the bottom of the base 5 is 0.1-0.3 meters. This design is to leave some distance between the bottom-adjusting jack 1 and the ground to prevent obstacles such as gravel on the ground from abrading the bottom-adjusting jack 1.

[0051] Based on the bottom adjustment device provided in the above embodiments, a second aspect of this application also provides a hydraulic support, including the bottom adjustment device of the above embodiments. Since the hydraulic support provided in this embodiment has the bottom adjustment device provided in any of the above embodiments, the hydraulic support has all the beneficial effects of the bottom adjustment device provided in any of the above embodiments, which will not be elaborated further here.

[0052] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary model," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A bottom-adjustment device, characterized in that, include: The bottom adjustment jack (1) is set between the bases (5) of the two hydraulic supports; The connecting block (3) is inserted into the base (5) through the first mounting hole (51); the first mounting hole (51) is provided on the inner main stiffening plate (53) of the base (5); The two ends of the bottom adjustment jack (1) are respectively connected to the connecting block (3) via connectors (2); The connector (2) includes a first U-shaped opening (21) and a second U-shaped opening (22). The first U-shaped opening (21) is hinged to the bottom adjusting jack (1) via a first pin (23). The second U-shaped opening (22) is hinged to the connecting block (3) via a second pin (24).

2. The bottom adjustment device as described in claim 1, characterized in that, The first U-shaped opening (21) and the second U-shaped opening (22) are orthogonally arranged. The first U-shaped opening (21) is used to provide the bottom-adjusting jack (1) with a vertical degree of freedom, and the second U-shaped opening (22) is used to provide the bottom-adjusting jack (1) with a horizontal degree of freedom.

3. The bottom adjustment device as described in claim 1, characterized in that, The base (5) is provided with a first limiting plate (55) and a second limiting plate (56). The first limiting plate (55) and the second limiting plate (56) are located above and below the connecting block (3), respectively. The first limiting plate (55) and the second limiting plate (56) together with the surrounding base ribs form a box to accommodate the connecting block (3).

4. The bottom adjustment device as described in claim 1, characterized in that, The connecting block (3) is detachably connected to the base (5) via a fixing mechanism (4).

5. A bottom-adjustment device as described in claim 4, characterized in that, The fixing mechanism (4) is a first locking pin (41), which is inserted into the connecting block (3) through a second mounting hole (52); the second mounting hole (52) is located on the upper main stiffening plate (54) of the base (5).

6. A bottom-adjustment device as described in claim 5, characterized in that, The first locking pin (41) is provided with a first U-shaped clip (42).

7. A bottom-adjustment device as described in claim 4, characterized in that, The fixing mechanism (4) is a second locking pin (43), which is inserted into the tail end of the connecting block (3); the tail end of the connecting block (3) protrudes from the third mounting hole (57), which is located on the outer main stiffening plate (58) of the base (5).

8. A bottom-adjustment device as described in claim 7, characterized in that, The second locking pin (43) is provided with a second U-shaped clip (44).

9. A bottom-adjustment device as described in claim 1, characterized in that, The height difference between the lower edge of the bottom adjustment jack (1) and the bottom of the base (5) is 0.1-0.3 meters.

10. A hydraulic support, characterized in that, include: A bottom-tone device as described in any one of claims 1-9.

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