Hydraulic support convenient to extend for coal mine

Abstract

The utility model discloses a hydraulic support convenient to extend for a coal mine, belongs to the technical field of hydraulic supports, and is used for solving the problem that the supporting area of the hydraulic support for the coal mine is too small. Comprising an extension mechanism; under the auxiliary action of a first hinge seat and a second hinge seat, an extension plate can slide towards the outside of a sliding groove in the sliding groove, at the moment, the supporting range of the hydraulic support to the coal mine face can be enlarged, and when the extension plate extends to the outside of the sliding groove, a second servo electric cylinder can work; when an output shaft of a second servo electric cylinder extends to the maximum degree, the upper surface of the parallel top plate and the upper surface of a top beam are located on the same horizontal line, so that an extension plate and the top beam can support the coal mine surface together, and the supporting area of the hydraulic support can be enlarged through extension of the extension plate; the position replacement frequency when the hydraulic support supports a coal mine is reduced, the labor intensity is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic supports, and in particular relates to a hydraulic support which can be easily extended and is used in coal mines. Background Art

[0002] The main function of the hydraulic support in coal mines is to provide stable support and ensure the safety of miners. During the mining process of the coal mine working face, the pressure of the ore and the roof will cause the roof to collapse. In order to prevent accidents, the hydraulic support will automatically adjust the height and position of the support as needed to maintain the stability of the miners' working face. The hydraulic support has the characteristics of high reliability, strong support and easy adjustment.

[0003] The supporting area of ​​existing coal mine hydraulic supports is mostly the width of the top beam. This means that when encountering some mine surfaces where the supporting range is larger than the area of ​​one top beam and smaller than the area of ​​two top beams, the hydraulic supports need to be moved back and forth, which is time-consuming and labor-intensive and affects coal mining efficiency. Utility Model Content

[0004] The utility model aims to provide a hydraulic support for coal mines which can be easily extended to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic support for coal mines that can be easily extended, a hydraulic support body, an extension mechanism is provided inside the hydraulic support body, the extension mechanism includes a top beam, a sliding groove is provided inside the top beam, limit rails are provided on both sides of the interior of the sliding groove, a support slide rod is provided inside the limit rail, a sliding block is slidably connected to the circumferential surface of the support slide rod, an extension plate is provided between the two sliding blocks, a first hinge seat is provided on the lower surface of the top beam, a second hinge seat is provided on the lower surface of the extension plate, and a first servo electric cylinder is provided between the first hinge seat and the second hinge seat.

[0006] Preferably, extension mechanisms are provided on both sides of the top beam, the sliding block is slidably connected to the limiting rail, the extension plate is slidably connected to the sliding groove, and the first articulated seat, the second articulated seat and the first servo electric cylinder are provided in multiple groups.

[0007] Preferably, a lifting groove is provided inside the extension plate, second servo electric cylinders are provided on both sides inside the lifting groove, and a parallel top plate is provided at the output end of the second servo electric cylinder.

[0008] Preferably, the lifting slots, the second servo electric cylinders, and the parallel top plates are provided in multiple groups inside the extension plate.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] (1) This kind of hydraulic support for coal mines can be easily extended. When it is necessary to increase the supporting range of the coal mine surface, the first servo electric cylinder can be operated. With the assistance of the first hinge seat and the second hinge seat, a pulling force can be provided to the extension plate. At this time, the extension plate will slide in the sliding groove toward the outside of the sliding groove. At this time, the support range of the hydraulic support for the coal mine surface can be increased. When the extension plate extends to the outside of the sliding groove, the second servo electric cylinder can be operated to drive the parallel top plate to rise. When the output shaft of the second servo electric cylinder is extended to the maximum extent, the upper surface of the parallel top plate and the upper surface of the top beam are on the same horizontal line. The upper surface of the parallel top plate and the upper surface of the top beam are on the same horizontal line, which can ensure that when the coal mine surface is in a horizontal state, the extension plate can play a supporting role for the coal mine surface together with the top beam. By extending the extension plate, the supporting area of ​​the hydraulic support can be expanded, and the frequency of position replacement of the hydraulic support when supporting the coal mine can be reduced, thereby reducing labor intensity and improving work efficiency.

[0011] (2) This kind of hydraulic support for coal mines can be easily extended. The sliding grooves are provided with multiple groups. When the extension plate partially slides out of the sliding grooves, under the action of the second servo electric cylinder and the parallel top plate, the extension plate can still play a supporting role for the coal mine surface together with the top beam when the coal mine surface is in a horizontal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the extension mechanism of the utility model;

[0014] Figure 3 It is a schematic diagram of the top cross-section three-dimensional structure of the top beam of the utility model;

[0015] Figure 4 It is a schematic diagram of the exploded structure of the extension plate of the utility model.

[0016] In the figure: 10, hydraulic support body; 20, extension mechanism; 21, top beam; 22, sliding groove; 23, limit rail; 24, support slide rod; 25, sliding block; 26, extension plate; 27, first articulated seat; 28, second articulated seat; 29, first servo electric cylinder; 210, lifting groove; 211, second servo electric cylinder; 212, parallel top plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 - Figure 4 The utility model provides a hydraulic support for coal mines that can be easily extended, including a hydraulic support body 10, an extension mechanism 20 is arranged inside the hydraulic support body 10, the extension mechanism 20 includes a top beam 21, a sliding groove 22 is arranged inside the top beam 21, and limiting rails 23 are arranged on both sides of the inside of the sliding groove 22, and a support slide 24 is arranged inside the limiting rail 23, and a sliding block 25 is slidably connected to the circumferential surface of the support slide 24, and the sliding block 25 is slidably connected to the limiting rail 23, an extension plate 26 is arranged between the two sliding blocks 25, and the extension plate 26 is slidably connected to the sliding groove 22, and the limiting rail 23 can limit the sliding range of the sliding block 25, thereby extending the extension mechanism 20. The extension plate 26 is limited in its internal sliding range within the sliding groove 22, which can prevent the extension plate 26 from sliding out of the top beam 21. The support slide rod 24 can increase the stability of the extension plate 26 when it slides out. A first hinge seat 27 is provided on the lower surface of the top beam 21, and a second hinge seat 28 is provided on the lower surface of the extension plate 26. A first servo electric cylinder 29 is provided between the first hinge seat 27 and the second hinge seat 28. The first hinge seat 27, the second hinge seat 28 and the first servo electric cylinder 29 are provided in multiple groups. On the one hand, they are used to provide driving force for the extension plate 26 to slide out, and on the other hand, they can also support the extended plate 26 that slides out, thereby ensuring the stability of the subsequent extension plate 26 when supporting the coal mine surface.

[0019] It should be noted that extension mechanisms 20 are provided on both sides of the top beam 21, which can facilitate the expansion of the support range of the coal mine surface. When the support range of the coal mine surface needs to be increased, the first servo electric cylinder 29 can be operated. When the first servo electric cylinder 29 is working, it can provide pulling force to the extension plate 26 with the assistance of the first articulated seat 27 and the second articulated seat 28. At this time, the extension plate 26 will slide in the sliding groove 22 to the outside of the sliding groove 22. At this time, the hydraulic support can increase the support range of the coal mine surface.

[0020] A lifting slot 210 is disposed inside the extension plate 26 . Second servo electric cylinders 211 are disposed on both sides of the lifting slot 210 . A parallel top plate 212 is disposed at the output end of the second servo electric cylinder 211 .

[0021] It should be noted that when the extension plate 26 extends to the outside of the sliding groove 22, the second servo electric cylinder 211 can be operated, and the operation of the second servo electric cylinder 211 can drive the parallel top plate 212 to rise. When the output shaft of the second servo electric cylinder 211 is extended to the maximum extent, the upper surface of the parallel top plate 212 is on the same horizontal line as the upper surface of the top beam 21. The upper surface of the parallel top plate 212 is on the same horizontal line as the upper surface of the top beam 21, which can ensure that when the coal mine surface is in a horizontal state, the extension plate 26 can play a supporting role together with the top beam 21 for the coal mine surface. At the same time, the sliding groove 22 is provided with multiple groups, which can facilitate the extension plate 26 to partially slide out of the sliding groove 22. Under the action of the second servo electric cylinder 211 and the parallel top plate 212, when the coal mine surface is in a horizontal state, the extension plate 26 can play a supporting role together with the top beam 21 for the coal mine surface.

[0022] Working principle and use process of the utility model: when the device is used, when it is necessary to increase the support range of the coal mine surface, the first servo electric cylinder 29 can be operated. When the first servo electric cylinder 29 is operating, with the assistance of the first hinge seat 27 and the second hinge seat 28, a pulling force can be provided to the extension plate 26. At this time, the extension plate 26 will slide in the sliding groove 22 toward the outside of the sliding groove 22. At this time, the hydraulic support can increase the support range of the coal mine surface. When the extension plate 26 extends to the outside of the sliding groove 22, the second servo electric cylinder 211 can be operated. The operation of the second servo electric cylinder 211 can drive the parallel top plate 212 to rise. When When the output shaft of the second servo electric cylinder 211 is extended to the maximum extent, the upper surface of the parallel top plate 212 is on the same horizontal line as the upper surface of the top beam 21. The upper surface of the parallel top plate 212 is on the same horizontal line as the upper surface of the top beam 21, which can ensure that when the coal mine surface is in a horizontal state, the extension plate 26 can play a supporting role for the coal mine surface together with the top beam 21. At the same time, the sliding groove 22 is provided with multiple groups, which can facilitate the extension plate 26 to partially slide out of the sliding groove 22. Under the action of the second servo electric cylinder 211 and the parallel top plate 212, when the coal mine surface is in a horizontal state, the extension plate 26 can play a supporting role for the coal mine surface together with the top beam 21.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic support for coal mines that can be easily extended, the hydraulic support body (10), characterized in that: An extension mechanism (20) is provided inside the hydraulic support body (10), and the extension mechanism (20) includes a top beam (21), a sliding groove (22) is provided inside the top beam (21), and limiting rails (23) are provided on both sides of the inside of the sliding groove (22), and a supporting slide rod (24) is provided inside the limiting rail (23), and a sliding block (25) is slidably connected to the circumferential surface of the supporting slide rod (24), and an extension plate (26) is provided between the two sliding blocks (25), and a first hinge seat (27) is provided on the lower surface of the top beam (21), and a second hinge seat (28) is provided on the lower surface of the extension plate (26), and a first servo electric cylinder (29) is provided between the first hinge seat (27) and the second hinge seat (28).

2. The extendable hydraulic support for coal mines according to claim 1, characterized in that: Extension mechanisms (20) are provided on both sides of the top beam (21), the sliding block (25) is slidably connected to the limit rail (23), the extension plate (26) is slidably connected to the sliding groove (22), and the first hinge seat (27), the second hinge seat (28) and the first servo electric cylinder (29) are provided in multiple groups.

3. The extendable hydraulic support for coal mines according to claim 2, characterized in that: A lifting groove (210) is provided inside the extension plate (26), a second servo electric cylinder (211) is provided on both sides inside the lifting groove (210), and a parallel top plate (212) is provided at the output end of the second servo electric cylinder (211).

4. The extendable hydraulic support for coal mines according to claim 3, characterized in that: The lifting slot (210), the second servo electric cylinder (211), and the parallel top plate (212) are provided in multiple groups inside the extension plate (26).

Images