A mechanical prop

Abstract

The utility model relates to mine roadway supporting equipment technical field especially relates to a kind of mechanical pillar.The technical scheme includes lower steel pipe, upper steel pipe and the bidirectional screw rod of connecting both, and the cross handle is equipped in the middle of this screw rod.By rotating handle, the thread cooperation of bidirectional screw rod and upper and lower steel pipe is utilized, and it is moved back, the stepless adjustment of support height and self-locking support are realized.Supporting mechanism is equipped in both ends of the pillar, spherical universal shaft is connected with the steel backing plate of isosceles triangle, so that it can self-adapting uneven roof and floor, and the flexible antiskid layer on the surface of steel backing plate enhances support stability.Arc-shaped fender of upper steel pipe outer wall can be combined to form column.The utility model integrates height flexible adjustment, self-adapting flexible contact, lateral protection and support area expansion, and has the advantages of high safety, strong adaptability, simple structure and low cost.

Description

Technical Field

[0001] This utility model relates to the field of mine roadway support equipment technology, and in particular to a mechanical support. Background Technology

[0002] Mine roadway support is a crucial aspect of ensuring safety during underground operations. During tunnel excavation and use, the roof and floor may deform due to geological changes or mining activities, leading to alterations in roadway dimensions (height and width). This places high demands on the adaptability and reliability of support equipment. Traditional support methods often exhibit insufficient flexibility and inadequate safety when facing these changes.

[0003] Currently, single hydraulic props are widely used in tunnel support operations. These props primarily rely on the pressure of an internal fluid (such as an emulsion) to provide support. Their working principle involves injecting fluid into the prop cylinder through an external pump station, causing the prop to rise and press against the roof and floor plates, utilizing the incompressibility of the fluid to bear the roof pressure. During use, the support height is typically adjusted by controlling the injection and discharge of the fluid.

[0004] However, this method of support relying on liquid pressure inherently carries the risk of pressure leakage. Long-term wear of seals, accidental breakage, or valve failure can all lead to liquid leakage, causing a sudden drop in the support capacity of the prop or even its failure, posing a serious safety threat to personnel and equipment downhole. Furthermore, its adjustment flexibility is limited, making it difficult to quickly respond to frequent changes in roadway specifications. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a mechanical support.

[0006] This application provides a mechanical support column, comprising a lower steel pipe and an upper steel pipe arranged symmetrically in an upper and lower position, and further comprising: A bidirectional screw connecting the lower and upper steel pipes, wherein the reverse threads on the upper and lower sides of the outer wall of the bidirectional screw are respectively threaded to the lower and upper steel pipes, and a handle with a cross design is provided in the middle. The lower steel pipe and the upper steel pipe are both fixed with a fixing sleeve on their outer walls, and several rotating shafts are provided inside the fixing sleeve. The outer wall of the rotating shaft is provided with a protective plate, and an extension mechanism is provided inside the protective plate. The end of the extension mechanism is provided with an outer plate and a support mechanism.

[0007] Optionally, the support mechanism is mounted on one end of the outer plate via a spherical universal joint, and an extension plate is fixedly provided on the other end of the outer plate. A steel pad is installed on the movable part of the spherical universal joint.

[0008] Optionally, the extension mechanism includes several slots formed inside the guard plate, a sliding groove is formed inside the extension plate, and an arc-shaped locking block slides inside the sliding groove, with a limit plate fixed to the outer wall of the locking block.

[0009] Optionally, a telescopic rod is provided between the locking block and the sliding groove, the movable end of the telescopic rod is fixed inside the locking block, and a spring is sleeved on its outer wall.

[0010] Optionally, one end of the spring is fixed inside the locking block, and the other end is fixed inside the sliding groove.

[0011] Optionally, the limiting plate slides inside the slide groove, and the locking block slides inside the locking groove.

[0012] Optionally, the steel pad is designed in the shape of an isosceles triangle, and its surface is provided with a flexible anti-slip layer.

[0013] Optionally, several of the aforementioned protective plates are designed in an arc shape, and when combined, they can cover the outer wall of the upper steel pipe to form a column.

[0014] In summary, this application includes at least one of the following beneficial technical effects: This utility model adopts a purely mechanical structure and provides support force through the self-locking characteristics of the bidirectional screw, which fundamentally eliminates the risk of pressure leakage caused by liquid leakage in hydraulic supports and greatly improves the inherent safety of support operations.

[0015] Furthermore, the support height can be steplessly adjusted by rotating the screw, with a fast response speed, which can flexibly adapt to different heights and dynamically changing roadway conditions, thus improving support efficiency and expanding the application range. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a mechanical support is provided. Figure 2 This is a schematic diagram of the upper steel pipe structure; Figure 3 This is a schematic diagram of the extension plate structure; Figure 4 This is a schematic diagram of the internal structure of the protective plate; Figure 5 for Figure 4 Schematic diagram of the structure at point A in the middle.

[0017] Reference numerals: 1. Lower steel pipe; 2. Two-way lead screw; 3. Handle; 4. Fixing sleeve; 5. Rotating shaft; 6. Guard plate; 7. Upper steel pipe; 8. Slot; 9. Outer plate; 10. Spherical universal joint; 11. Steel pad; 12. Extension plate; 13. Slide groove; 14. Locking block; 15. Limiting plate; 16. Telescopic rod; 17. Spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 and Figure 2 As shown, the present invention proposes a mechanical support, comprising a lower steel pipe 1 and an upper steel pipe 7. In one embodiment, the lower steel pipe 1 and the upper steel pipe 7 are arranged symmetrically, and a bidirectional threaded rod 2 is provided between them. The reverse threads on the upper and lower sides of the outer wall of the bidirectional threaded rod 2 are threadedly connected to the lower steel pipe 1 and the upper steel pipe 7, respectively. A handle 3 with a cross-shaped design is also provided in the middle. The mechanical support is described in detail below: In this embodiment, during operation, the support is placed between the top and bottom plates of the roadway, ensuring it is roughly horizontal and vertical. The operator rotates the cross-shaped handle 3, causing the bidirectional lead screw 2 to rotate. Because the threads on the upper and lower sides of the bidirectional lead screw 2 are opposite in direction and engage with the threads inside the lower steel pipe 1 and the upper steel pipe 7 respectively, the lower steel pipe 1 and the upper steel pipe 7 move in opposite or opposite directions as the lead screw rotates. When the handle 3 is rotated forward, the upper and lower steel pipes extend synchronously, pressing against the top and bottom plates to generate support force; when rotated in the opposite direction, the steel pipes can be retracted, reducing the support height. This achieves stepless and precise adjustment of the support height, flexibly adapting to changes in roadway specifications. Furthermore, the self-locking characteristic of the lead screw maintains the support state, increasing the safety of the support operation.

[0020] like Figures 1-3 As shown, the mechanical support also includes a fixing sleeve 4 set on the outer wall of the lower steel pipe 1 and the upper steel pipe 7; in one embodiment, the fixing sleeve 4 is provided with a plurality of rotating shafts 5, the outer wall of the rotating shaft 5 is provided with a protective plate 6, and its end is provided with an outer connecting plate 9 and a support mechanism. The support mechanism is mounted on one end of the outer plate 9 via a spherical universal joint 10. An extension plate 12 is fixedly installed on the other end of the outer plate 9. A steel pad 11 is installed on the movable part of the spherical universal joint 10. The support mechanism is described in detail below: In this embodiment, several pivots 5 on the outer wall fixing sleeve 4 of the upper steel pipe 7 allow the arc-shaped protective plate 6 to unfold outwards. When the support is tightened, it prevents lateral gravel from falling and impacting the main pipe. The internal slots 8 provide a foundation for the extension mechanism. The support mechanism is mounted on the outer plate 9 via a spherical universal pivot 10, allowing the steel pad 11 to self-adaptively deflect at a certain angle when contacting an uneven top plate, ensuring uniform force distribution and forming reliable flexible contact. The flexible anti-slip layer on the surface of the steel pad 11 further increases friction, preventing slippage and enhancing the reliability and safety of the support. Finally, the protective plate 6 can be rotated around the pivots 5 to a combined state, covering the outer wall of the upper steel pipe 7 to form a protective column, facilitating storage and transport.

[0021] like Figures 1-5 As shown, the mechanical support also includes an extension mechanism disposed inside the guard plate 6; in one embodiment, the extension mechanism includes a plurality of slots 8 opened inside the guard plate 6, a sliding groove 13 is opened inside the extension plate 12, and an arc-shaped locking block 14 slides inside the sliding groove 13, and a limit plate 15 is fixed to the outer wall of the locking block 14. A telescopic rod 16 is provided between the locking block 14 and the slide groove 13. The movable end of the telescopic rod 16 is fixed inside the locking block 14, and a spring 17 is sleeved on its outer wall. One end of the spring 17 is fixed inside the locking block 14, and the other end is fixed inside the slide groove 13. The limiting plate 15 slides inside the slide groove 13, and the locking block 14 slides inside the locking groove 8. The extension mechanism is described in detail below: In this embodiment, when the support area needs to be expanded, the operator can directly pull the extension plate 12 outward. When the extension plate 12 moves, the locking block 14 inside it slides along the locking groove 8 inside the guard plate 6. The spring 17 provides preload to the telescopic rod 16 and the locking block 14 fixed thereto, so that the locking block 14 can be stably locked in the locking groove 8 without external force intervention, achieving temporary positioning. When the extension plate 12 is pulled to the desired position, the elastic force of the spring 17 drives the locking block 14 to embed into the current locking groove 8, completing the locking. The limiting plate 15 slides in the slide groove 13 to prevent the locking block 14 from completely dislodging, realizing rapid and multi-level adjustment of the support area, and maintaining the locked state under the continuous action of the spring 17. The structure is simple and the operation is convenient.

[0022] Specifically, during operation, the mechanical support is first placed between the roof and floor of the tunnel, ensuring it is roughly vertical. Then, the operator rotates the cross-shaped handle 3 in the middle of the double-acting screw 2, causing the screw to rotate. Because the upper and lower sides of the outer wall of the double-acting screw 2 are machined with reverse threads, which mesh with the corresponding threads inside the lower steel pipe 1 and the upper steel pipe 7 respectively, when the screw rotates, it drives the lower steel pipe 1 and the upper steel pipe 7 to produce linear movements in opposite directions. When the handle 3 is rotated in the forward direction, the upper and lower steel pipes extend synchronously until the support mechanisms at both ends tightly press against the roof and floor of the tunnel, generating a stable support force. When it is necessary to retract or lower the support height, rotating the handle 3 in the reverse direction will retract the upper and lower steel pipes, realizing stepless and precise adjustment of the support height. It can flexibly and quickly adapt to changes in tunnel specifications and reliably maintain the support state by utilizing the self-locking characteristics of the screw drive, fundamentally enhancing the safety of the support operation.

[0023] While the core support is being established, the arc-shaped protective plates 6 can rotate via several pivots 5. Once the support column is tightened, the upper support mechanism is mounted on the outer plate 9 via a spherical universal pivot 10. This allows the upper steel pad 11 to self-adaptively deflect at a certain angle when contacting uneven roadway roofs, ensuring the stress point remains in surface contact with the roof and guaranteeing support stability. Simultaneously, the flexible anti-slip layer on the surface of the steel pad 11 effectively increases the coefficient of friction, preventing slippage during stress application. Afterward, the protective plates 6 surrounding the upper steel pipe 7 can be rotated inward around their respective pivots 5 to merge, forming a protective column enclosing the main pipe. This not only prevents lateral gravel or debris from directly impacting the steel pipe body, but the internal slots 8 also provide a base and connection point for the extension mechanism.

[0024] When a larger support area is required, the extension mechanism can be activated to expand the support range. The operator simply pulls the extension plate 12 outward. During the pulling process, the locking block 14, fixed inside the extension plate 12, remains in contact with the locking groove 8 inside the guard plate 6 and slides along with it under the preload of the spring 17. When the extension plate 12 is pulled out to the desired position, the locking block 14 quickly engages in the corresponding locking groove 8 under the restoring force of the spring 17, completing the locking. During this process, the limiting plate 15, fixed to the locking block 14, slides within the slide groove 13 of the extension plate 12, preventing the locking block 14 from excessive displacement or complete disengagement under the action of the spring 17. The telescopic rod 16 ensures the linearity and stability of the moving trajectory of the locking block 14. Through this mechanism, rapid, multi-level adjustment of the support area is achieved, and a firm lock is maintained under the continuous action of the spring 17, making operation simple and convenient.

[0025] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A mechanical support column, comprising a lower steel pipe (1) and an upper steel pipe (7) arranged symmetrically in an upper and lower position, characterized in that, Also includes: A two-way screw rod (2) connects the lower steel pipe (1) and the upper steel pipe (7). The reverse threads on the upper and lower sides of the outer wall of the two-way screw rod (2) are respectively threaded to the lower steel pipe (1) and the upper steel pipe (7). A handle (3) with a cross design is also provided in the middle. The lower steel pipe (1) and the upper steel pipe (7) are both fixed with a fixing sleeve (4), and a number of rotating shafts (5) are provided inside the fixing sleeve (4). The outer wall of the rotating shaft (5) is provided with a guard plate (6), and an extension mechanism is provided inside the guard plate (6). The end of the guard plate (6) is provided with an outer plate (9) and a support mechanism.

2. A mechanical support according to claim 1, characterized in that, The support mechanism is installed on one end of the outer plate (9) via a spherical universal joint (10), and an extension plate (12) is fixedly provided on the other end of the outer plate (9). A steel pad (11) is installed on the movable part of the spherical universal joint (10).

3. A mechanical prop according to claim 2, wherein, The extension mechanism includes several slots (8) inside the guard plate (6), a sliding groove (13) is provided inside the extension plate (12), and an arc-shaped locking block (14) slides inside the sliding groove (13). A limit plate (15) is fixed to the outer wall of the locking block (14).

4. A mechanical support according to claim 3, characterized in that, A telescopic rod (16) is provided between the locking block (14) and the sliding groove (13). The movable end of the telescopic rod (16) is fixed inside the locking block (14), and a spring (17) is sleeved on its outer wall.

5. A mechanical support according to claim 4, characterized in that, One end of the spring (17) is fixed inside the locking block (14), and the other end is fixed inside the sliding groove (13).

6. A mechanical prop according to claim 5, wherein, The limiting plate (15) slides inside the slide groove (13), and the locking block (14) slides inside the locking groove (8).

7. A mechanical support according to claim 2, characterized in that, The steel pad (11) is designed in the shape of an isosceles triangle and has a flexible anti-slip layer on its surface.

8. A mechanical support according to claim 1, characterized in that, Several of the aforementioned protective plates (6) are designed in an arc shape, and when combined, they can cover the outer wall of the upper steel pipe (7) to form a column.

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