A center sill roof beam extension structure

By installing primary and secondary side protection plates on the top beam in the middle of the fully mechanized coal mining face and balancing them with counterweights, the risk of removing the end support was solved, the stability and disassembly of the support were achieved, and the safety of coal mining was ensured.

CN224515217UActive Publication Date: 2026-07-17SHAANXI SHANMEI HUANGLING MINING IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHAANXI SHANMEI HUANGLING MINING IND CO LTD
Filing Date
2025-07-31
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In traditional coal mine fully mechanized mining faces, the installation of end supports at the secondary cut-off position poses a risk of removal due to the collapse of the goaf roof and the manifestation of mine pressure, resulting in the inability to safely remove them and install the middle supports.

Method used

A central frame top beam extension structure is designed. By installing a top beam on the top side of the hydraulic frame and equipping it with primary and secondary side guard plates, a mechanical hard connection is adopted, and a counterweight is added to balance the weight of the device, thereby achieving the stability and disassembly of the support.

Benefits of technology

It effectively solves the problem of supporting the top plate of the working face tail when the cutting length changes, ensuring the safe removal and reinstallation of the support, preventing the support from tilting, and improving the balance and stability of the support.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224515217U_ABST
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Abstract

The utility model discloses a kind of middle frame roof beam extension structures, it is related to coal mining technical field, it includes hydraulic frame body and drilling machine, hydraulic frame body top side is equipped with roof beam, the middle position of the bottom side of the front end of roof beam is equipped with double-layer connecting plate one, double-layer connecting plate one is connected with double-layer connecting plate two by support plate, double-layer connecting plate two is installed in the bottom end middle position of primary support plate. By increasing primary support plate and secondary support plate in the front end of original middle frame roof beam, and primary support plate and secondary support plate are mechanically hard connection type with roof beam, keep support plate elongation state, and secondary sleeve installation only needs to be restored to middle support by removing the extension roof beam device of reforming, to effectively solve the problem of working face machine tail roof support when open-off cut length changes, by increasing about 0.8t counterweight at tail beam, to balance the weight of the roof beam device of reforming, to improve support balance stability, effectively prevent support dumping phenomenon from occurring.
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Claims

1. A middle frame top beam extension structure comprising a hydraulic frame body (1) and a drilling machine (2), a top beam (3) is installed on the top side of the hydraulic frame body (1), characterized in that: A double-layer connecting plate one (4) is installed at the middle of the bottom side of the front end of the top beam (3). The double-layer connecting plate one (4) is connected to a double-layer connecting plate two (6) through a support plate (5). The double-layer connecting plate two (6) is installed at the middle of the bottom end of the first-level side guard plate (7). Double-layer connecting seats (8) are installed on both sides of the bottom end of the first-level side guard plate (7). The rear ends of the two double-layer connecting seats (8) are connected to a connecting plate one (9). The two connecting plates one (9) are installed on both sides of the bottom side of the front end of the top beam (3). The front ends of the two double-layer connecting seats (8) are connected to a connecting plate two (11). The two connecting plates two (11) are installed on both sides of the bottom end of the second-level side guard plate (10). A counterweight (12) is installed at the tail beam of the hydraulic frame (1).

2. A center sill top tie extension structure as defined in claim 1 wherein: The upper surfaces of the top beam (3), the first-level side guard plate (7) and the second-level side guard plate (10) are flush.

3. The center sill top tie extension of Claim 1, wherein: The primary side guard plate (7) can be used alone in combination with the top beam (3), and the front end of the primary side guard plate (7) is reserved for the installation position of the secondary side guard plate, and the secondary side guard plate (10) needs to be used in combination with the primary side guard plate (7) and the top beam (3).

4. The center sill top tie extension of Claim 1, wherein: The length of the primary side guard plate (7) is 930mm, and the length of the secondary side guard plate (10) is 400mm.

5. The center sill top tie extension of Claim 1, wherein: The counterweight (12) is cylindrical and has a weight of 0.8t.

6. A center sill top tie extension as defined in claim 1 wherein: The two ends of the support plate (5) are connected to the first double-layer connecting plate (4) and the second double-layer connecting plate (6) by bolts. The double-layer connecting seat (8) is connected to the first connecting plate (9) by a single bolt. The front end of the double-layer connecting seat (8) is connected to the second connecting plate (11) by two bolts.