Limiting ring for coal mine hydraulic support

Abstract

The utility model relates to the technical field of coal mining equipment accessories, and discloses a limit ring for a coal mine hydraulic support, which comprises a limit ring, a buffer bulge is arranged on the inner side wall of the limit ring, a plurality of limit bosses are circumferentially distributed on the outer wall of the limit ring in an array manner, and a mounting seam penetrating through the limit ring is arranged on one side of the limit ring along the axial direction of the limit ring. A buckle mechanism is arranged in the mounting seam; according to the utility model, the wave-shaped buffer bulge, the limiting boss which is designed as required and is of a rectangular structure and a convenient buckling mechanism are integrated, and a corrosion-resistant rubber material is adopted, so that the deformation of the buffer bulge is utilized to absorb impact and reduce the damage of parts, and the precise matching with the bracket limiting baffle block is realized; meanwhile, the problems that a traditional limiting ring is prone to corrosion, poor in buffering, inconvenient to install and maintain and the like are solved, the operation stability and safety of the hydraulic support are improved, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mining equipment accessories, and in particular to a limiting ring for a coal mine hydraulic support. Background Technology

[0002] In coal mining operations, hydraulic supports are key equipment to ensure the safety and normal production of the coal face. During frequent extension, retraction, lifting and lowering movements of the various moving parts of the hydraulic support, precise positional limitation is required to ensure the stable operation of the support, the coordinated work of the various parts, and the safety of the operators.

[0003] Currently, the limiting devices used in coal mine hydraulic supports have many shortcomings. Traditional limiting rings are mostly made of metal, which, although possessing a certain strength, are prone to rust and corrosion in the harsh environment of underground mines, which is humid and rich in corrosive gases and dust. This leads to reduced limiting accuracy, frequent replacements, increased maintenance costs, and downtime. Moreover, metal limiting rings have poor buffering performance, failing to effectively mitigate the impact generated by the movement of hydraulic support components, resulting in accelerated component wear, shortened lifespan, and potentially causing safety accidents in severe cases. In addition, some limiting devices have unreasonable structural designs, making installation and disassembly difficult and causing great inconvenience to equipment inspection and maintenance. Utility Model Content

[0004] In view of the problems of existing traditional metal limit devices for hydraulic supports in coal mines, such as susceptibility to corrosion caused by the harsh underground environment, resulting in decreased accuracy, poor buffering performance leading to increased component wear, and unreasonable structural design causing difficulties in installation and maintenance, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a limiting ring for a hydraulic support in a coal mine, comprising a limiting ring, a buffer protrusion on the inner side wall of the limiting ring, a plurality of limiting bosses distributed in a circumferential array on the outer wall of the limiting ring, and an installation seam penetrating the limiting ring on one side along its axial direction, wherein a buckling mechanism is provided in the installation seam.

[0006] As a preferred embodiment, the buckle mechanism includes a hook, which is fixedly installed on one side wall of the installation seam, and a groove adapted to the hook is provided on one side wall of the installation seam corresponding to the hook.

[0007] As a preferred embodiment, the hook includes a support rod, the upper end of which is fixedly connected to the inner wall of the installation seam. The lower end of the support rod is provided with a locking block. A groove is provided on the top of the locking block. Sliding rods are symmetrically arranged in the groove. A slider is provided between the sliding rods. The two ends of the slider are slidably sleeved on the outer sides of the sliding rods on both sides. A spring is sleeved on the outer side of the sliding rod on one side of the slider. The two ends of the spring are fixedly connected to the slider and the inner wall of the groove on one side, respectively.

[0008] As a preferred embodiment, the end of the card block away from the card hook is provided with a first inclined surface, and the side wall of the card slot opening is provided with a second inclined surface that matches the first inclined surface.

[0009] As a preferred embodiment, the buffer protrusion is fixedly connected to the inner wall of the limiting ring, and the buffer protrusion has a wave-shaped structure.

[0010] As a preferred embodiment, the limiting boss is rectangular and is fixedly connected to the outer wall of the limiting ring.

[0011] As a preferred embodiment, the limiting ring has a disassembly groove communicating with the card slot on one side. The limiting ring is composed of a blend of EPDM rubber and nitrile rubber, and the blended rubber material contains reinforcing agents, plasticizers, and antioxidants.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] 1. This utility model solves the problems of existing limit rings being prone to corrosion downhole, having poor buffering performance, and being inconvenient to install and maintain, thereby improving the operational stability and safety of hydraulic supports and reducing maintenance costs.

[0014] 2. This utility model reduces component damage by absorbing impact energy through the deformation of the wave-shaped buffer protrusions.

[0015] 3. The height and width of the limiting boss in this utility model are designed based on the actual limiting requirements of the hydraulic support, and are consistent with...

[0016] The limit blocks on the bracket work precisely to limit the position. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the hook structure of this utility model;

[0019] Figure 3 This is a partial cross-sectional structural diagram of the limiting ring of this utility model;

[0020] Figure 4 For the present utility model Figure 3 A magnified structural diagram of A in the diagram.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Limiting ring; 2. Buffer protrusion; 3. Limiting boss; 4. Installation seam; 5. Hook; 6. Slot; 7. Disassembly slot; 8. Support rod; 9. Block; 10. Inclined surface one; 11. Inclined surface two; 12. Sliding rod; 13. Sliding block; 14. Spring; 15. Slide groove. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Reference Figures 1-4 As shown, a limiting ring for a coal mine hydraulic support is provided, including a limiting ring 1. The inner wall of the limiting ring 1 is provided with a buffer protrusion 2, and the outer wall of the limiting ring 1 is provided with a plurality of limiting bosses 3 arranged in a circumferential array. One side of the limiting ring 1 is provided with an installation seam 4 that penetrates the limiting ring 1 along its axial direction, and a buckling mechanism is provided in the installation seam 4. By integrating buffering, limiting and convenient installation functions, the shortcomings of the traditional limiting ring 1 are effectively solved and the overall performance is improved.

[0025] In this example, the snap-fit ​​mechanism includes a snap hook 5, which is fixedly installed on one side wall inside the installation seam 4. A snap groove 6 adapted to the snap hook 5 is provided on one side wall inside the installation seam 4 corresponding to the snap hook 5. This enables quick installation and disassembly, significantly shortening installation and maintenance time and improving maintenance efficiency compared to traditional structures.

[0026] In this example, the hook 5 includes a support rod 8, and the upper end of the support rod 8 is fixedly connected to the inner wall of the mounting seam 4.

[0027] The lower end of the support rod 8 is provided with a locking block 9, and the top of the locking block 9 is provided with a sliding groove 15. Sliding rods 12 are symmetrically arranged in the sliding groove 15, and sliders 13 are provided between the sliding rods 12. The two ends of the sliders 13 are respectively slidably sleeved on the outside of the sliding rods 12 on both sides. A spring 14 is sleeved on the outside of the sliding rods 12 on one side of the slider 13, and the two ends of the spring 14 are respectively fixedly connected to the inner wall of the slider 13 and the sliding groove 15. The structure of the spring 14 and the slider 13 gives the hook 5 an elastic self-adjusting ability, which can adapt to small errors during installation, ensure a tight and stable connection, and prevent loosening.

[0028] In this example, the end of the card block 9 away from the hook 5 is provided with a bevel 10, and the side wall of the opening of the slot 6 is provided with a bevel 11 that is adapted to the bevel 10. The structure of the bevel 10 and the bevel 11 facilitates the quick alignment and insertion of the hook 5 and the slot 6, further improving the ease of installation, while providing a guiding function and reducing installation resistance.

[0029] In this example, the buffer protrusion 2 is fixedly connected to the inner wall of the limiting ring 1, and the buffer protrusion 2 has a wave-shaped structure. The wave-shaped buffer protrusion 2 absorbs the impact energy by its own deformation, reduces component damage, effectively reduces the impact force generated by the movement of the hydraulic support component, extends the service life of the component, and reduces the safety hazards caused by impact.

[0030] In this example, the limiting boss 3 is rectangular and is fixedly connected to the outer wall of the limiting ring 1. The height and width of the limiting boss 3 are designed according to the actual limiting requirements of the hydraulic support. It is precisely matched with the limiting block on the support to achieve position limitation, ensure the accurate positioning of each moving part of the hydraulic support in frequent operation, and improve the stability of the support operation.

[0031] In this example, a disassembly groove 7 communicating with the slot 6 is provided on one side of the limiting ring 1. The limiting ring 1 is composed of a blend of EPDM rubber and nitrile rubber, and reinforcing agents, plasticizers, and antioxidants are added to the blended rubber material. In this example, nano-silica is used as a reinforcing agent to improve the strength and hardness of the rubber; an appropriate amount of plasticizer is added to improve processing performance and flexibility; and antioxidants are added to delay aging and extend service life. The disassembly groove 7 facilitates disassembly operations, allowing the disassembly tool to be inserted into the disassembly groove 7 for pushing.

[0032] The movable locking block 9 facilitates the disassembly of the limit ring 1. The blended rubber material and additive combination significantly enhances the corrosion resistance, mechanical strength and flexibility of the limit ring, preventing rust and corrosion caused by the harsh downhole environment, reducing the frequency of replacement and lowering maintenance costs.

[0033] During use, the overall functional principle is as follows: The limit ring 1 effectively solves the shortcomings of traditional limit rings by integrating buffering, limiting, and convenient installation functions. The wave-shaped buffer protrusion 2 on its inner wall absorbs energy by deforming itself when the hydraulic support components are impacted, reducing component damage. The limiting boss 3 on the outer wall precisely matches the support limiting block to limit the range of motion of the components. The installation seam 4 and the buckle mechanism enable quick assembly and disassembly. The three work together to improve the stability and safety of the hydraulic support operation.

[0034] Installation and connection principles:

[0035] Select a limit ring 1 with an appropriate inner diameter based on the size of the hydraulic support component that needs to be limited, to ensure a tight fit with the piston rod or pin.

[0036] During installation, the limiting ring 1 is fitted by aligning the installation seam 4, so that the hook 5 is aligned with the slot 6. The inclined surface 10 of the locking block 9 cooperates with the inclined surface 11 of the slot 6 to provide guidance and reduce installation resistance.

[0037] Pressing the limiting ring 1 causes the hook 5 to engage with the slot 6. The spring 14 and slider 13 inside the hook 5 exhibit elastic self-adjustment capabilities, adapting to minor errors and ensuring a tight and stable connection to prevent loosening. During disassembly, a tool, such as a rod, is inserted into the disassembly slot 7 and moved within it, thereby applying external force to push the support rod 8 to move, causing the hook 5 to separate from the slot 6 for easy maintenance.

[0038] Limiting and buffering principles:

[0039] During operation, the limiting boss 3 abuts against the limiting block of the bracket, precisely restricting the movement of the components and ensuring the accurate positioning of each moving part of the hydraulic bracket during frequent movements.

[0040] When the component moves and generates an impact, the wave-shaped buffer protrusion 2 undergoes elastic deformation, converting the impact energy into its own elastic potential energy, effectively reducing the impact force, extending the service life of the component, and reducing safety hazards.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A limiting ring for a hydraulic support in a coal mine, comprising a limiting ring (1), characterized in that: The inner wall of the limiting ring (1) is provided with a buffer protrusion (2), and the outer wall of the limiting ring (1) is provided with a plurality of limiting bosses (3) arranged in a circumferential array. The limiting ring (1) is provided with an installation seam (4) that penetrates the limiting ring (1) along its axial direction on one side, and a buckling mechanism is provided in the installation seam (4).

2. The limiting ring for a hydraulic support in a coal mine according to claim 1, characterized in that: The buckle mechanism includes a hook (5), which is fixedly installed on one side wall inside the installation seam (4). A groove (6) adapted to the hook (5) is provided on one side wall inside the installation seam (4) corresponding to the hook (5).

3. A limiting ring for a coal mine hydraulic support according to claim 2, characterized in that: The hook (5) includes a support rod (8), and the upper end of the support rod (8) is fixedly connected to the inner wall of the installation seam (4). The lower end of the support rod (8) is provided with a locking block (9). The top of the locking block (9) is provided with a sliding groove (15). Sliding rods (12) are symmetrically arranged in the sliding groove (15). A slider (13) is provided between the sliding rods (12). The two ends of the slider (13) are respectively slidably sleeved on the outside of the sliding rods (12) on both sides. A spring (14) is sleeved on the outside of the sliding rod (12) on one side of the slider (13). The two ends of the spring (14) are respectively fixedly connected to the inner wall of the slider (13) and the sliding groove (15).

4. A limiting ring for a hydraulic support in a coal mine according to claim 3, characterized in that: The card block (9) has a slope one (10) at the end away from the card hook (5), and the card slot (6) has a slope two (11) on one side wall that is adapted to the slope one (10).

5. A limiting ring for a coal mine hydraulic support according to claim 4, characterized in that: The buffer protrusion (2) is fixedly connected to the inner wall of the limiting ring (1), and the buffer protrusion (2) has a wave-shaped structure.

6. A limiting ring for a coal mine hydraulic support according to claim 2, characterized in that: The limiting boss (3) is rectangular and is fixedly connected to the outer wall of the limiting ring (1).

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