Height-adjustable coal mine hydraulic support

Abstract

The height-adjustable coal mine hydraulic support comprises a top beam, a shield beam and a base, the top beam and the shield beam are hinged through a hinge piece, the shield beam and the base are connected through a connecting rod mechanism, a stand column is arranged in the middle of the base, the top of the stand column is connected with the middle of the top beam in a hinged mode, and the top of the stand column is connected with the middle of the top beam in a hinged mode. The stand column is a multi-section telescopic stand column and comprises a cylinder barrel of a three-section sleeve structure, a first-stage cylinder barrel and a movable column, the connecting rod mechanism is connected with the base through an adjusting seat, the upper portion of the adjusting seat is hinged to the front connecting rod and the rear connecting rod, and the lower portion of the adjusting seat is connected with the base in a sliding mode. By adjusting the height of the four connecting rods of the support and adjusting the double telescopic stand columns, the support can adapt to fully-mechanized mining supporting of the thickness of a multi-layer coal seam, the rigid structure limitation of a traditional support is broken through through the cooperative adjusting mechanism of the three-level adjustable stand columns and the reconfigurable four connecting rods, and the use requirement of a coal mine is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a height adjustable coal mine hydraulic support belongs to coal mining technical field. BACKGROUND

[0002] The coal deposit thickness is not unified, and two specifications of hydraulic supports are needed for the coal mines with little difference in the coal deposit thickness, resulting in a large amount of capital cost of the coal mines.

[0003] At present, a set of fully mechanized hydraulic support and supporting fully mechanized equipment are used for each coal seam, and a coal mine chooses to abandon resources and does not mine, and a coal mine that must be mined can only be mined at a loss, and the coal mine group company has different thickness of coal seams to be mined, and the coal mine hydraulic support with an adjustable height cannot meet the use demand of the coal mine. SUMMARY

[0004] The utility model discloses a height adjustable coal mine hydraulic support, which can realize support adaptation to multi-layer coal seam thickness fully mechanized mining support by adjusting the height of the four connecting rods of the support and the double telescopic columns.

[0005] To achieve the above-mentioned purpose, the utility model is adopted The technical scheme is as follows:

[0006] In a first aspect, the utility model provides a height adjustable coal mine hydraulic support, including roof beam, shelter beam and base, the roof beam and shelter beam are hinged through hinged part, the shelter beam and base are connected through connecting rod mechanism, the base middle part is provided with stand, and the top of stand is hinged with the middle part of roof beam, the stand is telescopic stand of multisection, including three section sleeve structure's cylinder, primary cylinder and movable column, the connecting rod mechanism is connected with base through adjusting seat, the upper part of adjusting seat is hinged with front connecting rod and rear connecting rod, and the lower part is slidingly connected with base.

[0007] Further, the multisection telescopic stand cylinder is made of alloy steel through deep hole processing, and is plated with a hard chromium layer on the surface, and is equipped with an explosion-proof valve and a displacement sensor, the inner wall of the cylinder and the primary cylinder is provided with a guide groove, the primary cylinder and the movable column are provided with a detachable limiting ring, the surface of the movable column is embedded with a self-lubricating composite material layer, and the top end is provided with a quick-change connector.

[0008] Further, the connecting rod mechanism includes a front connecting rod and a rear connecting rod forming an asymmetric quadrilateral structure, the front connecting rod has an I-shaped steel section and is provided with composite bearing seats at both ends, and is fixed at a certain angle with the base, the rear connecting rod has a box-shaped structure and is filled with damping material inside.

[0009] Furthermore, the top beam is a box-shaped beam made of high-strength alloy steel, with an arc-shaped contact surface with raised texture on the top surface to form a surface contact with the coal seam roof, and is connected to multiple telescopic columns through multiple sets of hinge shafts to form a ball hinge connection.

[0010] Furthermore, the main body of the adjustment seat is a trapezoidal cast steel part, with a guide groove on the bottom surface that matches the base, a matrix of positioning holes on the top, and a hydraulic lifting device integrated on the side.

[0011] Furthermore, a hydraulic pin-type locking device is provided at the connection between the top beam and the multi-section telescopic column, and a conical locking tongue is used in conjunction with a pressure self-locking mechanism for connection.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0013] I. This solution adds an adjusting seat between the connecting rod and the base, and sets the column as a three-section sleeve structure. By adjusting the height of the four-link support and the double telescopic column, the support can be adapted to multi-layer coal seam thickness fully mechanized mining support. The coordinated adjustment mechanism of the three-level adjustable column and the reconfigurable four-link support in this solution breaks through the rigid structure limitation of traditional supports and meets the needs of coal mine use.

[0014] II. This solution utilizes a variable quadrilateral mechanism formed by the adjusting seat and front and rear connecting rods, combined with the multi-stage telescopic characteristics of the multi-section telescopic column, to construct a spatial constraint system with adaptive capabilities. The asymmetric connecting rod ratio design optimizes the force transmission path of the support frame, and the mounting surface of the adjusting seat and the mounting groove of the base form a dual positioning reference, improving the reassembly accuracy.

[0015] Third, this solution, through the deep integration of structural innovation and height adjustment control, has constructed a new generation of hydraulic support technology system, which significantly improves the adaptability to complex coal seam conditions while ensuring support strength, and provides reliable equipment support for efficient coal mining. Attached Figure Description

[0016] The accompanying drawings, which constitute a part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an undue limitation of this utility model. In the drawings:

[0017] Fig. 1 A schematic diagram of a height-adjustable hydraulic support for coal mines before adjustment, provided in Embodiment 1 of this utility model;

[0018] Fig. 2 This is a schematic diagram of an adjustable height hydraulic support for coal mines after adjustment, provided in Embodiment 1 of this utility model.

[0019] Fig. 3The utility model provides a multi -section telescopic column structure diagram of height adjustable coal mine hydraulic support for embodiment one of the utility model.

[0020] In the drawing: 1, roof beam; 2, stand; 3, shield beam; 4, front connecting rod; 5, rear connecting rod; 6 base; 22, multi -section telescopic column; 221, cylinder barrel; 222, primary cylinder cylinder barrel; 223, active column. DETAILED DESCRIPTION

[0021] The utility model will be described in detail below in combination with the drawings and embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] The following detailed description is exemplary description, and is intended to provide further detailed description for the utility model. Unless otherwise specified, all technical terms used in the utility model are the same as the meanings understood by the general technical personnel in the field to which the utility model belongs. The terms used in the utility model are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model.

[0023] Embodiment:

[0024] Please refer to Figs. 1-3 The embodiment provides a height adjustable coal mine hydraulic support, and specific structure includes roof beam 1, shield beam 3 and base 6. In which roof beam 1 and shield beam 3 are hinged through hinged part, shield beam 3 and base 6 are connected through connecting rod mechanism, the middle part of base 6 is provided with stand 2, and the top of stand 2 is hinged with the middle part of roof beam 1, wherein:

[0025] Roof beam 1 adopts the box type beam body made of high-strength alloy steel, and the top surface is provided with the arc contact surface with convex lines, forms surface contact with coal seam roof, forms spherical hinge connection with stand 2 through multiple hinged shafts, has a certain angle of deflection compensation capacity, and simultaneously integrates pressure sensor array inside, and real-time monitoring roof load distribution.

[0026] Stand 2 is improved to multi -section telescopic column 22, including three sleeve structure cylinder barrel 221, primary cylinder 222 and active column 223, height adjustment can be realized through combined connection, and the cylinder body is made of alloy steel and is processed by deep hole, and the surface is plated with hard chromium layer, and is equipped with explosion-proof valve and displacement sensor, the inner wall of cylinder barrel 221 and primary cylinder 222 is provided with guide groove, primary cylinder 222 and active column 223 are provided with detachable limiting ring, the surface of active column 223 is embedded with self-lubricating composite material layer and is provided with quick-change connector at the top end.

[0027] The connecting rod mechanism comprises a front connecting rod 4 and a rear connecting rod 5, the front connecting rod 4 and the rear connecting rod 5 form an asymmetric quadrilateral structure, the front connecting rod 4 adopts an I-shaped steel section, both ends are provided with composite bearing seats, and a fixed included angle with the base 6 is formed, the rear connecting rod 5 is a box-shaped structure and is filled with damping material inside, and an angle compensator is arranged at the connecting point. In the embodiment, the connecting rod mechanism is connected with the base 6 through an adjusting seat 7, the upper part of the adjusting seat 7 is hinged with the front connecting rod 4 and the rear connecting rod 5, the lower part is slidingly connected with the base 6, the height adjustment between the connecting rod mechanism and the base 6 is realized through the adjusting seat 7, and a dynamic stable geometric constraint system is formed at the same time.

[0028] After a series of modifications are made to the existing coal mine hydraulic support, the height-adjustable coal mine hydraulic support in the embodiment can be obtained. First, the roof beam 1 is separated from the column 2, the front connecting rod 4 and the rear connecting rod 5 are separated from the base 6, the column 2 is separated from the base 6, the column 2 is adjusted and replaced by a multi-section telescopic column 22, then the multi-section telescopic column 22 is assembled with the base 6, the adjusting seat 7 is assembled with the base 6, then the front connecting rod 4 and the rear connecting rod 5 are assembled with the adjusting seat 7, and finally the multi-section telescopic column 22 is assembled with the roof beam 1.

[0029] It should be noted that a hydraulic bolt type locking device is arranged at the connection between the roof beam 1 and the multi-section telescopic column 22, a tapered locking tongue is matched with a pressure self-locking mechanism, and the connection and separation operation can be completed in a short time. The adjusting seat 7 is a trapezoidal cast steel part, the bottom surface is provided with a guide groove matched with the base 6 accurately, the top part is provided with a matrix type positioning hole, and the side surface is integrated with a hydraulic jacking device, so that the pre-tightening force can be provided.

[0030] In the installation preparation stage of the height-adjustable coal mine hydraulic support in the embodiment, firstly, the geological adaptability analysis is carried out, the support adjustment parameters are determined according to the coal seam thickness variation curve Hth, and the three-dimensional support model is established. According to the thickness mutation area A-H profile, the optimal adjusting seat installation height h and the column telescopic ratio are calculated. Then the component pretreatment is carried out, including the low temperature plasma nitriding treatment of the adjusting seat 7, the surface hardness is improved; the molybdenum disulfide-based solid lubricating film is applied on the guide section of the movable column 223, the zero points of various sensors are calibrated, and the pressure-displacement coupling parameters of the control system are set.

[0031] The variable quadrilateral mechanism formed by the adjusting seat and the front and rear connecting rods, in cooperation with the multi-stage telescopic characteristics of the multi-section telescopic column, constructs a spatial constraint system with self-adaptive capability. The asymmetric connecting rod ratio design optimizes the force transmission path of the support, the installation surface of the adjusting seat and the installation groove of the base form a double positioning reference, the recombination accuracy is improved, the connecting rod hinge point is provided with an elastic damper, and the instantaneous energy of the impact load is effectively absorbed. The quick connector design of the movable column realizes the replacement within a certain period of time, the standard interface of the cylinder allows cross-model compatibility, and the universal connection interface of the roof beam adapts to various column types.

[0032] This solution's three-stage adjustable column and reconfigurable four-bar linkage adjustment mechanism overcomes the limitations of traditional rigid support structures. The dynamic compensation hinge system enables the support to adapt to varying heights. Modular design achieves a technological breakthrough of "partial adjustment replacing overall replacement." The multi-dimensional adjustment mechanism shortens the traditionally lengthy support modification process to a shorter timeframe. Safety interlocking devices ensure system stability during transitions between different processes. Standardized components reduce spare parts inventory, repeatable adjustment extends the support's service life, and downhole modification operations save on transportation and installation costs. Multiple redundancy designs ensure that single-point failures do not affect overall functionality, the real-time monitoring system can identify minute structural deformations, and the explosion-proof hydraulic system meets ATEX certification standards.

[0033] This technical solution, through the deep integration of structural innovation and height adjustment control, has constructed a new generation of hydraulic support technology system. While ensuring support strength, it significantly improves the adaptability to complex coal seam conditions, providing reliable equipment support for efficient coal mining.

[0034] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A height-adjustable hydraulic support for coal mines, characterized in that, It includes a top beam (1), a shield beam (3) and a base (6). The top beam (1) and the shield beam (3) are hinged together by a hinge joint. The shield beam (3) and the base (6) are connected by a linkage mechanism. A column (2) is provided in the middle of the base (6), and the top of the column (2) is hinged to the middle of the top beam (1). The column (2) is a multi-section telescopic column (22), including a cylinder (221) with a three-section sleeve structure, a first-stage cylinder (222) and a piston (223). The linkage mechanism is connected to the base (6) through an adjusting seat (7). The upper part of the adjusting seat (7) is hinged to the front connecting rod (4) and the rear connecting rod (5), and the lower part is slidably connected to the base (6).

2. The height-adjustable hydraulic support for coal mines according to claim 1, characterized in that, The cylinder body of the multi-section telescopic column (22) is made of alloy steel through deep hole processing and is plated with a hard chrome layer. It is also equipped with an explosion-proof valve and a displacement sensor. The inner walls of the cylinder (221) and the first-stage cylinder (222) are provided with guide grooves. The first-stage cylinder (222) and the piston (223) are equipped with detachable limit rings. The surface of the piston (223) is inlaid with a self-lubricating composite material layer and the top is equipped with a quick-change connector.

3. The height-adjustable hydraulic support for coal mines according to claim 1, characterized in that, The linkage mechanism includes a front link (4) and a rear link (5) that form an asymmetrical quadrilateral structure. The front link (4) is made of I-beam cross section and has composite bearing seats at both ends, forming a fixed angle with the base (6). The rear link (5) is a box-shaped structure and is filled with damping material.

4. The height-adjustable hydraulic support for coal mines according to claim 1, characterized in that, The top beam (1) is a box-shaped beam made of high-strength alloy steel. The top surface is provided with an arc-shaped contact surface with raised texture, which forms a surface contact with the coal seam roof. It is also connected to multiple telescopic columns (22) through multiple sets of hinge shafts to form a ball hinge connection.

5. The height-adjustable hydraulic support for coal mines according to claim 1, characterized in that, The main body of the adjustment seat (7) is a trapezoidal cast steel part, with a guide groove on the bottom surface that matches the base (6), a matrix positioning hole on the top, and a hydraulic lifting device integrated on the side.

6. The height-adjustable hydraulic support for coal mines according to claim 1, characterized in that, The connection between the top beam (1) and the multi-section telescopic column (22) is provided with a hydraulic pin-type locking device, and is connected by a conical locking tongue in conjunction with a pressure self-locking mechanism.

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