Jack protection structure for coal mine hydraulic support
By designing a protective structure for the jacks of the coal mine hydraulic support, the problem of the bottom adjustment beam's skew affecting the extension and retraction of the jacks after pulling was solved, achieving higher safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI LUAN MACHINERY
- Filing Date
- 2023-08-07
- Publication Date
- 2026-05-08
AI Technical Summary
The existing hydraulic support for the bottom adjustment beam is prone to tilting during the forward movement, which affects the extension and retraction of the pull-back jack, resulting in reduced safety and reliability.
A protective structure for jacks used in coal mine hydraulic supports was designed, including a base, a bottom adjusting beam, a hinge block, a bottom adjusting jack, a pull-back sliding jack, a double-eared connecting ring, and a circular chain. The hinge and connection method avoids pipeline interference between the bottom adjusting beam and the pull-back sliding jack, ensuring their normal expansion and contraction.
This improved the hydraulic support's ability to adjust its deviation and its safety and reliability, avoided pipeline interference between the bottom adjustment beam and the pull-back jack, and ensured the normal operation of the pull-back jack.
Smart Images
Figure CN224214196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of jack protection technology, specifically a jack protection structure for hydraulic supports in coal mines. Background Technology
[0002] Hydraulic supports are hydraulic power devices that use liquid pressure to generate supporting force and achieve automatic relocation for roof support and management. They are an indispensable supporting equipment in fully mechanized coal mining. Hydraulic supports are mainly used in longwall longwall mining faces with horizontal planes and gently inclined thick coal seams of 10 degrees or less, where top coal is caved in one pass along the floor for full-height mining. They are also suitable for horizontal layered top coal caving longwall mining faces with steeply inclined extra-thick coal seams.
[0003] With the continuous improvement of the longwall top coal caving technology, coal mines usually use hydraulic supports with a reasonable bottom adjustment beam. The existing bottom adjustment beam hydraulic supports have the problem of deflection during the forward movement, which will affect the extension and retraction of the pull-back jack. Utility Model Content
[0004] This utility model provides a protective structure for jacks used in hydraulic supports in coal mines to solve the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a protective structure for a jack used in a coal mine hydraulic support, comprising a base, a bottom adjustment beam installed on the side of the base, a hinge block installed on the bottom adjustment beam, a bottom adjustment jack hinged to the base, and the bottom adjustment jack hinged to the bottom adjustment beam.
[0006] Furthermore, the piston rod head of the bottom-adjusting jack is hinged to the base, and the cylinder bottom of the bottom-adjusting jack is hinged to the bottom-adjusting beam.
[0007] Furthermore, an mounting block is installed on the side of the base, and the mounting block is hinged to a pull-back jack.
[0008] Furthermore, the pull-back jack and the bottom adjustment beam are located on one side, and the pull-back jack is located above the bottom adjustment beam.
[0009] Furthermore, the end of the pull-back jack furthest from the mounting block is hinged with a double-eared connecting ring, and the double-eared connecting ring is hinged with a circular chain.
[0010] Furthermore, the rear end of the circular chain is connected to the rear conveyor.
[0011] Compared with the prior art, this utility model provides a protective structure for jacks used in coal mine hydraulic supports, which has the following beneficial effects: the protective structure for jacks used in coal mine hydraulic supports has a strong adjustment capability and high safety and reliability during use, and can avoid interference between the bottom adjustment beam and the pipeline of the pull-back jack, so as to ensure the extension and retraction of the pull-back jack. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the bottom-adjustment jack of this utility model under the display.
[0014] Figure 3 This is a front view schematic diagram of the present invention;
[0015] Figure 4 This is a side view of the present invention.
[0016] In the diagram: 1. Base; 2. Mounting block; 3. Pull-back jack; 4. Double-ear connecting ring; 5. Circular chain; 6. Bottom adjustment beam; 7. Bottom adjustment jack. Detailed Implementation
[0017] 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.
[0018] Please see Figure 1-3 This utility model discloses a protective structure for a hydraulic jack used in a coal mine, including a base 1, a bottom adjustment beam 6 installed on the side of the base 1, a hinge block installed on the bottom adjustment beam 6, a bottom adjustment jack 7 hinged to the base 1, the bottom adjustment jack 7 hinged to the bottom adjustment beam 6, the piston rod head of the bottom adjustment jack 7 hinged to the base 1, and the bottom of the cylinder of the bottom adjustment jack 7 hinged to the bottom adjustment beam 6.
[0019] The number of bottom-mounted jacks 7 is at least two.
[0020] When the bottom adjustment jack 7 extends, the bottom adjustment beam 6 presses against the outer main reinforcement of the temporary frame base 1 to achieve the adjustment function.
[0021] Specifically, an mounting block 2 is installed on the side of the base 1, and the mounting block 2 is hinged to the pull-back jack 3.
[0022] The pull-back jack 3 and the bottom adjustment beam 6 are located on one side, and the pull-back jack 3 is located above the bottom adjustment beam 6.
[0023] In this implementation plan, the piston rod head of the pull-back jack 3 is hinged to the mounting block 2. The front end of the pull-back jack 3 is located at a higher position behind the bridge of the base 1. It adopts an inverted, internal liquid inlet structure. All pipelines are located at the piston rod head, which is far away from the bottom adjusting beam 6 to avoid interference.
[0024] Specifically, the end of the pull-back jack 3 furthest from the mounting block 2 is hinged with a double-eared connecting ring 4, and the double-eared connecting ring 4 is hinged with a circular chain 5.
[0025] The rear end of the circular chain 5 is connected to the rear conveyor.
[0026] In this implementation plan, the lower end of the cylinder of the rear sliding jack is located on the upper part of the bottom adjusting beam 6, and the rear conveyor is pulled by retracting the jack.
[0027] Furthermore, since the front hinge position of the pull-back jack 3 is relatively high in the technical solution of this application, while the hinge hole position of the rear conveyor remains unchanged, a slanted pull rear conveyor is formed. Therefore, unlike the conventional pull-back device, the pull-back jack 3 in the technical solution of this application requires a greater pulling force than the conventional structure.
[0028] In summary, the protective structure for the hydraulic support in this coal mine has strong adjustment capability and high safety and reliability during use. At the same time, it can avoid interference between the bottom adjustment beam 6 and the pipeline of the pull-back jack 3, thus ensuring the extension and retraction of the pull-back jack 3.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A protective structure for a hydraulic jack used in a coal mine, comprising a base (1), characterized in that: A bottom adjustment beam (6) is installed on the side of the base (1), a hinge block is installed on the bottom adjustment beam (6), a bottom adjustment jack (7) is hinged on the base (1), and the bottom adjustment jack (7) is hinged to the bottom adjustment beam (6). The piston rod head of the bottom adjustment jack (7) is hinged to the base (1), and the bottom of the cylinder of the bottom adjustment jack (7) is hinged to the bottom adjustment beam (6); an installation block (2) is installed on the side of the base (1), and the installation block (2) is hinged to the pull-back sliding jack (3); the pull-back sliding jack (3) and the bottom adjustment beam (6) are located on one side, and the pull-back sliding jack (3) is located above the bottom adjustment beam (6).
2. The protective structure for a jack used in a coal mine hydraulic support according to claim 1, characterized in that: The pull-back jack (3) is hinged to a double-eared connecting ring (4) at the end away from the mounting block (2), and the double-eared connecting ring (4) is hinged to a circular chain (5).
3. The protective structure for a jack used in a coal mine hydraulic support according to claim 2, characterized in that: The rear end of the circular chain (5) is connected to the rear conveyor.