Hydraulic support

Abstract

The invention provides a hydraulic support which comprises a support assembly, a top beam, a forepoling component and a first driving part, the top beam is installed on the support assembly, the support assembly is used for supporting the top beam, and a containing space is formed in the top beam; the forepoling component is at least partially mounted in the accommodating space, and the forepoling component and the top beam can be relatively telescopic; the first driving part is arranged on the top beam and connected with the advance support part, and the first driving part can drive the advance support part to do telescopic motion relative to the top beam; wherein the forepoling component is of a box-shaped structure. The forepoling component is arranged to be of the box type structure, the strength of the forepoling component is improved, the better bending resistance is achieved, the situation that the forepoling component is deformed under the pressure of a top plate and cannot stretch out and draw back during forepoling work can be effectively avoided, and therefore frequent maintenance of the hydraulic support is not needed, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a hydraulic support. Background Art

[0002] Hydraulic support is an important supporting equipment for fully mechanized mining working face. Its main function is to support the roof of the mining area and maintain a safe working space. For coal seams with broken roof conditions and prone to spalling, the top beam of the hydraulic support needs to be equipped with a telescopic device and a side guard device to avoid roof collapse at the beam end and spalling of the coal wall. In related technologies, the design of the hydraulic support adopts a "telescopic beam + supporting beam + side guard plate" structure to meet this requirement.

[0003] However, since the joist has no box structure and is only hinged to the telescopic beam through a pair of pins, the joist has a high degree of freedom. The structure is complex, with large cumulative manufacturing tolerances and poor assembly. In actual underground production, the telescopic beam deforms and cannot be extended or retracted. In particular, the joist is damaged, the pin is deformed, and the guard plate shakes frequently. The underground work has to be replaced and repaired, which greatly affects production efficiency and worker safety.

[0004] Therefore, how to design a hydraulic support with an advanced support structure that is not easily damaged has become an urgent problem to be solved. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] Therefore, the present invention provides a hydraulic support.

[0007] To achieve the above-mentioned purpose, the present invention provides a hydraulic support, comprising: a support assembly; a top beam, installed on the support assembly, the support assembly is used to support the top beam, and an accommodation space is formed inside the top beam; an advance support component, at least partially installed in the accommodation space, and the advance support component and the top beam can be relatively telescopic; a first driving member, arranged on the top beam and connected to the advance support component, the first driving member can drive the advance support component to perform telescopic movement relative to the top beam; wherein the advance support component is a box-type structure.

[0008] The hydraulic support provided by the present invention includes a support assembly, a top beam, an advance support component and a first drive component. A accommodating space for accommodating the advance support component is formed inside the top beam. The advance support component can perform telescopic movement along the top beam. After the coal mining machine cuts coal, the advance support component can be quickly extended to provide timely support for the exposed roof to prevent the roof from falling, thereby playing a role of temporary support.

[0009] Furthermore, the present application increases the strength of the advance support component by setting it into a box-type structure, and has better bending resistance, which can effectively prevent the advance support component from being deformed by the pressure of the top plate during the advance support work, resulting in the inability to retract, thereby eliminating the need for frequent maintenance of the hydraulic support and improving work efficiency. At the same time, the use of a box-type advance support component to replace the combined structure of the telescopic beam and the support beam can reduce product costs.

[0010] In addition, the hydraulic support provided in this application may also have the following additional technical features:

[0011] In some embodiments, optionally, the advance support component includes a plurality of boxes, the plurality of boxes are sequentially arranged along the width direction of the top beam, and at least parts of two adjacent boxes are connected to each other.

[0012] In this embodiment, the advance support component in the present application is composed of a plurality of boxes, which are arranged in sequence along the width direction of the top beam, and at least part of the surfaces of two adjacent boxes are interconnected to form an integral advance support component. The box structure has good bending resistance, thereby ensuring the overall structural strength of the advance support component.

[0013] The multiple boxes may be box structures of the same shape or box structures of different shapes.

[0014] Two adjacent boxes can be welded together via a connector, or a mounting plate can be added and a plurality of boxes can be arranged on the mounting plate at intervals.

[0015] In some embodiments, optionally, a reinforcement component is provided inside the box.

[0016] In this embodiment, by arranging the reinforcement components inside the box, the overall strength of the box can be further increased, so that it can withstand greater external forces. In addition, the reinforcement components can increase the rigidity of the box, reduce the deformation of the box when subjected to force, and ensure that the advanced support components can achieve normal telescopic functions.

[0017] In some embodiments, optionally, the reinforcement component is a reinforcing plate.

[0018] In some embodiments, optionally, the advance support component is provided with one of a guide plate and a guide rail on both sides along the width direction of the top beam; the accommodating space is provided with the other of a guide plate and a guide rail on both sides along the width direction of the top beam; wherein the guide plate is at least partially located in the guide rail, and the guide plate cooperates with the guide rail to enable the advance support component to be able to extend and retract relative to the top beam.

[0019] In this embodiment, one of the guide plates and the guide rails is provided on both sides of the advance support component along the width direction of the top beam, and the other of the guide plates and the guide rails is provided on both sides of the accommodating space inside the top beam along the width direction of the top beam. The accommodating space is similar to one or more grooves opened on the top beam, and the guide plates or guide rails are arranged on the side walls of the grooves. Thus, by utilizing the cooperation between the guide plates and the guide rails, on the one hand, the smoothness of the extension and retraction of the advance support component can be ensured, and on the other hand, the bracket can utilize the top beam to support the advance support component, thereby eliminating the need to set a support beam structure and its required connecting parts, and lowering the cost.

[0020] At least two guide plates are provided on each side of the advance support component along the width direction of the top beam, and at least two guide rails are provided on each side of the accommodation space inside the top beam along the width direction of the top beam. Of course, at least two guide rails can also be provided on each side of the advance support component along the width direction of the top beam, and at least two guide plates can be provided on each side of the accommodation space inside the top beam along the width direction of the top beam, so as to further ensure the telescopic smoothness of the advance support component.

[0021] In some embodiments, optionally, multiple boxes are arranged at intervals along the width direction of the top beam; at least one box is provided with one of the guide plates and the guide rails on both sides along the width direction of the top beam; the accommodating space is provided with the other of the guide plates and the guide rails on both sides along the width direction of the top beam; wherein the guide plate is at least partially located in the guide rail, and the guide plate cooperates with the guide rail to enable the advance support component to be able to extend and retract relative to the top beam.

[0022] In this embodiment, multiple boxes are arranged at intervals along the width direction of the top beam, that is, there is a certain gap between two connected boxes. In this way, guide plates or guide rail structures can be set on both sides of any box, which further ensures the guiding effect between the top beam and the advance support component and strengthens the supporting effect of the top beam on the advance support component.

[0023] In some embodiments, optionally, a guide plate or a guide rail is provided on one of the boxes.

[0024] In this embodiment, by arranging the guide plate or guide rail on only one of the boxes, there is no need to arrange the guide plate or guide rail on all the boxes, thus improving the manufacturing efficiency of the hydraulic support.

[0025] Furthermore, when selecting a box, the middle box should be selected as much as possible to make the box bear force more evenly and avoid the advance support component from tipping over due to force.

[0026] In some embodiments, optionally, the hydraulic support further comprises: a coal leakage hole, which is arranged on a side of the advance support component close to the top beam along the telescopic direction, and the coal leakage hole penetrates the advance support component.

[0027] In this embodiment, a coal leakage hole is provided at the tail of the advance support component. When the advance support component is retracted after work is completed, the coal leakage hole is used to leak out the broken roof received by the advance support component, thereby preventing the broken roof from accumulating on the advance support component and affecting the telescopic performance of the advance support component. At the same time, there is no need to open a coal leakage hole on the top beam, which improves the maintainability.

[0028] In some embodiments, optionally, the hydraulic support also includes: a guard plate, one end of which can be rotatably mounted on a side of the advance support component away from the top beam along the telescopic direction, and the other end of the guard plate can move along the height direction of the hydraulic support; a second driving member, which is arranged on the advance support component and is hinged to the guard plate, and the second driving member can drive the guard plate to rotate relative to the advance support component.

[0029] In this embodiment, by installing a side guard plate on some of the advanced support components and adjusting the angle of the side guard plate by using the second driving member, the occurrence of side spalling can be effectively suppressed. At the same time, since the advanced support component is directly matched with the top beam, its stability is higher, which can effectively prevent the side guard plate from shaking during the coal mining operation and improve the overall stability of the hydraulic support.

[0030] In some embodiments, optionally, the first driving member is a hydraulic driving member.

[0031] In some embodiments, optionally, the second driving member is a hydraulic driving member.

[0032] In some embodiments, optionally, the hydraulic support further comprises: an ear seat welded on the advance support component, and the second driving member is hinged to the ear seat.

[0033] In this embodiment, the second driving member and the advance support component are connected via an ear seat, and the ear seat structure is welded to the advance support component, or the ear seat structure is a welded integral structure inserted into the advance support component, which has higher strength and effectively avoids the pin deformation and support beam damage that are prone to occur during the advance support action, thereby improving the overall structural strength of the hydraulic support.

[0034] In some embodiments, optionally, the support assembly includes: a base; a column, which is arranged on the base, and the top beam is installed on the column; and a pushing device, which is connected to the base and is used to push the base to move.

[0035] In this embodiment, the support assembly includes a base, a column and a push device. The base can transfer the roof pressure borne by the top beam to the ground, providing a stable support foundation for the top beam. The column can generate a support force through a hydraulic system to balance the roof pressure. At the same time, the height of the top beam can be adjusted according to different coal mining height requirements to adapt to different working surface conditions. The push device ensures the continuous progress of coal mining by pushing the base.

[0036] In some embodiments, optionally, the support assembly further includes a shielding beam, one end of which is connected to the top beam, and the other end of which is connected to the base.

[0037] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0039] Figure 1 A schematic structural diagram of an advance support component according to an embodiment of the present invention is shown;

[0040] Figure 2 A partial structural schematic diagram of an advanced support component according to an embodiment of the present invention is shown;

[0041] Figure 3 A schematic diagram showing the structure of a hydraulic support according to an embodiment of the present invention is shown;

[0042] Figure 4 A partial structural schematic diagram of a hydraulic support according to an embodiment of the present invention is shown;

[0043] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0044] 1 top beam, 2 advance support component, 21 box body, 3 bracket assembly, 32 base, 34 column, 36 push device, 4 guard plate, 5 ear seat; 6 coal leakage hole; 7 reinforcement component, 72 reinforcement plate, 8 first driving member, 9 second driving member, 10 guide plate, 11 guide rail, 12 accommodating space. DETAILED DESCRIPTION

[0045] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0047] Refer to the following Figures 1 to 4 A hydraulic support according to some embodiments of the present application is described.

[0048] In one embodiment of the present application, Figures 1 to 4 As shown, a hydraulic support is provided, including a support assembly 3, a top beam 1, an advance support component 2 and a first driving member 8, the top beam 1 is installed on the support assembly 3, the support assembly 3 is used to support the top beam 1, and an accommodating space 12 is formed inside the top beam 1; the advance support component 2 is at least partially installed in the accommodating space 12, and the advance support component 2 and the top beam 1 can be relatively telescopic; the first driving member 8 is arranged on the top beam 1 and connected to the advance support component 2, and the first driving member 8 can drive the advance support component 2 to perform telescopic movement relative to the top beam 1; wherein the advance support component 2 is a box-type structure.

[0049] The hydraulic support provided by the present invention includes a support assembly 3, a top beam 1, an advance support component 2 and a first drive member 8. A accommodating space 12 for accommodating the advance support component 2 is formed inside the top beam 1. The advance support component 2 can perform telescopic movement along the top beam 1. After the coal mining machine cuts coal, the advance support component 2 can be quickly extended to provide timely support for the exposed roof to prevent the roof from falling, thereby playing a role of temporary support.

[0050] Furthermore, the present application increases the strength of the advance support component 2 by setting it into a box-type structure, and has better bending resistance, which can effectively prevent the advance support component 2 from being deformed by the pressure of the top plate during the advance support work, resulting in the inability to retract, thereby eliminating the need for frequent maintenance of the hydraulic support and improving work efficiency. At the same time, the use of the advance support component 2 with a box-type structure to replace the combined structure of the telescopic beam and the support beam can reduce product costs.

[0051] In some embodiments, optionally, Figure 1 As shown, the advance support component 2 includes a plurality of boxes 21, which are arranged in sequence along the width direction of the top beam 1, and at least parts of two adjacent boxes 21 are connected to each other.

[0052] In this embodiment, the advance support component 2 in the present application is composed of a plurality of boxes 21, and the plurality of boxes 21 are arranged in sequence along the width direction of the top beam 1. At least part of the surface of two adjacent boxes 21 is interconnected to form an integral advance support component 2. The box 21 structure has good bending resistance, thereby ensuring the overall structural strength of the advance support component 2.

[0053] The multiple boxes 21 may be boxes 21 structures with the same shape or boxes 21 structures with different shapes.

[0054] Two adjacent boxes 21 may be welded together via a connector, or a mounting plate may be added and a plurality of boxes 21 may be arranged on the mounting plate at intervals.

[0055] In some embodiments, optionally, Figure 2As shown, a reinforcing component 7 is provided inside the box body 21 .

[0056] In this embodiment, by arranging the reinforcing member 7 inside the box body 21, the overall strength of the box body 21 can be further increased, so that it can withstand greater external forces. In addition, the reinforcing member 7 can increase the rigidity of the box body 21, reduce the deformation of the box body 21 when subjected to force, and ensure that the advanced support member 2 can achieve normal telescopic function.

[0057] In some embodiments, optionally, the reinforcing component 7 is a reinforcing plate 72 .

[0058] In some embodiments, optionally, Figure 2 and Figure 4 As shown, the advance support component 2 is provided with one of the guide plates 10 and the guide rails 11 on both sides along the width direction of the top beam 1; the accommodating space 12 is provided with the other of the guide plates 10 and the guide rails 11 on both sides along the width direction of the top beam 1; wherein, the guide plate 10 is at least partially located in the guide rail 11, and the advance support component 2 can be extended and retracted relative to the top beam 1 by the cooperation between the guide plate 10 and the guide rail 11.

[0059] In this embodiment, one of the guide plates 10 and the guide rails 11 is provided on both sides of the advance support component 2 along the width direction of the top beam 1, and the other of the guide plates 10 and the guide rails 11 is provided on both sides of the accommodating space 12 inside the top beam 1 along the width direction of the top beam 1. The accommodating space 12 is similar to one or more grooves opened on the top beam 1, and the guide plate 10 or the guide rail 11 is arranged on the side wall of the groove. Therefore, by utilizing the cooperation between the guide plate 10 and the guide rail 11, on the one hand, the telescopic smoothness of the advance support component 2 can be ensured, and on the other hand, the support can also utilize the top beam 1 to support the advance support component 2, thereby eliminating the need to set a support beam structure and its required connecting parts, and lowering the cost.

[0060] At least two guide plates 10 are provided on each side of the advance support component 2 along the width direction of the top beam 1, and at least two guide rails 11 are provided on each side of the accommodating space 12 inside the top beam 1 along the width direction of the top beam 1. Of course, at least two guide rails 11 can also be provided on each side of the advance support component 2 along the width direction of the top beam 1, and at least two guide plates 10 can be provided on each side of the accommodating space 12 inside the top beam 1 along the width direction of the top beam 1, so as to further ensure the telescopic smoothness of the advance support component 2.

[0061] In some embodiments, optionally, multiple boxes are arranged at intervals along the width direction of the top beam; at least one box 21 is provided with one of the guide plates 10 and the guide rails 11 on both sides along the width direction of the top beam 1; the accommodating space 12 is provided with the other of the guide plates 10 and the guide rails 11 on both sides along the width direction of the top beam 1; wherein the guide plate 10 is at least partially located in the guide rail 11, and the guide plate 10 cooperates with the guide rail 11 to enable the advance support component 2 to be able to extend and retract relative to the top beam 1.

[0062] In this embodiment, multiple boxes 21 are arranged at intervals along the width direction of the top beam 1, that is, there is a certain gap between two connected boxes 21. In this way, guide plates 10 or guide rails 11 structures can be set on both sides of any box 21, which further ensures the guiding effect between the top beam 1 and the advance support component 2, and at the same time strengthens the supporting effect of the top beam 1 on the advance support component 2.

[0063] In some embodiments, optionally, Figure 2 As shown, the guide plate 10 or the guide rail 11 is arranged on one of the boxes 21 .

[0064] In this embodiment, by arranging the guide plate 10 or the guide rail 11 on only one of the boxes 21, it is not necessary to arrange the guide plate 10 or the guide rail 11 on all the boxes 21, so that the manufacturing efficiency of the hydraulic support can be improved.

[0065] At least two guide plates 10 are provided on each side of the box body 21 along the width direction of the top beam 1, and at least two guide rails 11 are provided on each side of the accommodating space 12 inside the top beam 1 along the width direction of the top beam 1. Of course, at least two guide rails 11 can also be provided on each side of the box body 21 along the width direction of the top beam 1, and at least two guide plates 10 can be provided on each side of the accommodating space 12 inside the top beam 1 along the width direction of the top beam 1, so as to further ensure the telescopic smoothness of the advanced support component 2.

[0066] Furthermore, when selecting the box body 21, the middle box body 21 is selected as much as possible to make the box body 21 more evenly stressed and avoid the advanced support component 2 from tipping over due to the stress.

[0067] In some embodiments, optionally, Figure 1 and Figure 4 As shown, the hydraulic support further includes: a coal leakage hole 6, which is arranged on a side of the advance support component 2 close to the top beam 1 along the telescopic direction, and the coal leakage hole 6 penetrates the advance support component 2.

[0068] In this embodiment, by providing a coal leakage hole 6 at the tail of the advance support component 2, when the advance support component 2 is retracted after work is completed, the coal leakage hole 6 is used to leak out the broken roof received by the advance support component 2, thereby preventing the broken roof from accumulating on the advance support component 2 and affecting the telescopic performance of the advance support component 2. At the same time, there is no need to provide a coal leakage hole 6 on the top beam 1, which improves the maintainability.

[0069] In some embodiments, optionally, the hydraulic support also includes: a guard plate 4, one end of which can be rotatably installed on the side of the advance support component 2 away from the top beam 1 along the telescopic direction, and the other end of the guard plate 4 can move along the height direction of the hydraulic support; a second driving member 9, which is arranged on the advance support component 2 and is hinged to the guard plate 4, and the second driving member 9 can drive the guard plate 4 to rotate relative to the advance support component 2.

[0070] In this embodiment, by installing the side guard plate 4 on some of the advanced support components 2 and adjusting the angle of the side guard plate 4 by using the second driving member 9, the occurrence of side flapping can be effectively suppressed. At the same time, since the advanced support component 2 is directly matched with the top beam 1, its stability is higher, which can effectively prevent the side guard plate 4 from shaking during the coal mining operation, and improve the overall stability of the hydraulic support.

[0071] In some embodiments, optionally, the first driving member 8 is a hydraulic driving member.

[0072] In some embodiments, optionally, the second driving member 9 is a hydraulic driving member.

[0073] In some embodiments, optionally, Figure 1 and Figure 4 As shown, the hydraulic support further includes: an ear seat 5 welded to the advance support component 2 , and a second driving member 9 is hinged to the ear seat 5 .

[0074] In this embodiment, the second driving member 9 and the advance support component 2 are connected via the ear seat 5, and the ear seat 5 structure is welded to the advance support component 2, or the ear seat 5 structure is a welded integral structure inserted into the advance support component 2, which has higher strength and effectively avoids the pin deformation and support beam damage that are prone to occur during the advance support action, thereby improving the overall structural strength of the hydraulic support.

[0075] In some embodiments, optionally, Figure 3 As shown, the support assembly 3 includes: a base 32; a column 34, which is arranged on the base 32, and the top beam 1 is installed on the column 34; and a pushing device 36, which is connected to the base 32 and is used to push the base 32 to move.

[0076] In this embodiment, the support assembly 3 includes a base 32, a column 34 and a push device 36. The base 32 can transfer the roof pressure borne by the top beam 1 to the ground, providing a stable support foundation for the top beam 1. The column 34 can generate a support force through a hydraulic system to balance the roof pressure. At the same time, the height of the top beam 1 can be adjusted according to different coal mining height requirements to adapt to different working surface conditions. The push device 36 ensures the continuous progress of coal mining by pushing the base 32.

[0077] In some embodiments, optionally, the support assembly 3 further includes a shielding beam, one end of which is connected to the top beam 1 , and the other end of which is connected to the base 32 .

[0078] In one embodiment of the present application, an advance support and top beam structure and a hydraulic support using the structure are provided. The advance support structure (advance support component 2) has three boxes 21, namely, left, middle and right boxes, which have better bending resistance. The middle box is provided with an ear seat 5 structure which is directly hinged with the guard jack (second driving member). The ear seat 5 structure is a welded integral structure inserted into the box 21, which has higher strength and effectively avoids the pin deformation and support beam damage that are prone to occur during the advance support action. The middle box is provided with a first guide plate (guide plate 10) and a second guide plate (guide plate 10) on both sides. The top beam body is slotted in the middle, and a double slideway (guide rail 11) is provided on the middle slot corresponding to the advance support structure. While ensuring the overall structural strength, the top beam does not need to have a coal leakage hole. More importantly, it completely avoids the problems existing in the "telescopic beam + support beam" structure, and has better adaptability and economy.

[0079] Related technical problems of hydraulic supports:

[0080] Hydraulic support is an important support equipment for fully mechanized mining working face. Its main function is to support the roof of the mining area and maintain a safe working space. For coal seams with broken roof conditions and prone to spalling, the top beam of the hydraulic support needs to be equipped with a telescopic device and a side guard device to avoid roof collapse at the beam end and spalling of the coal wall. To meet this requirement, the current hydraulic support design mostly adopts a "telescopic beam + support beam + side guard plate" structure to meet this requirement. In order to ensure the operating space of the coal mining machine, the middle part of the existing design "telescopic beam + support beam" structure is generally weak. The support beam has no box structure and is only hinged to the telescopic beam through a pair of pins, so the support beam has a high degree of freedom. The structure is complex in process, with large cumulative manufacturing tolerances and poor assembly. In actual underground production, the telescopic beam is deformed and cannot be retracted, especially the support beam is damaged, the pin is deformed, and the side guard plate shakes frequently. The underground work has to be replaced and repaired, which greatly affects the production efficiency and worker safety.

[0081] like Figure 3As shown, the top beam component in the present invention is composed of a top beam body (top beam 1), an advance support device (advance support component 2), a side guard plate 4, a hydraulic system and a jack, wherein the top beam body mainly bears the periodic roof pressure to prevent the gangue generated by roof caving and roof collapse during coal mining from falling into the pedestrian area, the advance support device plays a role in preventing the broken roof from collapsing, and the side guard plate 4 can effectively inhibit the occurrence of roof spalling.

[0082] like Figure 1 , Figure 2 and Figure 4 As shown, the top beam body has a groove in the middle, and slideways (guide rails 11) are provided on both sides of the middle groove. The advance support structure is composed of three sections of left, middle and right boxes 21, each of which is provided with a reinforcing plate 72. The first guide plate (guide plate 10) and the second guide plate (guide plate 10) are provided on both sides of the middle box body, and the tail is provided with a coal leakage hole 6. The advance support structure is inserted into the cavity provided in the top beam body, and the telescopic jack is connected with the upper ear seat and the upper ear plate of the top beam body by a pin shaft. The telescopic jack (first driving member 8) is used to realize the action of the advance support structure, so as to achieve the purpose of advance support and effectively avoid the occurrence of roof collapse and slab failure. The ear seat 5 is welded inside the box body in a "rooting" manner. The side guard plate 4 is hinged to the side guard jack cylinder head through a pin shaft; the side guard jack cylinder bottom is hinged to the advance support structure, and the side guard jack (second driving member 9) is telescopic to realize the opening and retraction of the side guard plate 4.

[0083] The hydraulic support provided by the present invention has the following advantages:

[0084] 1) Solve the problem of "shaking" and telescopic jamming of the support during advance support in coal mining operations.

[0085] 2) No joist structure and its required connectors, lower cost.

[0086] 3) The advanced support structure has a three-section box-type structure with strong bending resistance.

[0087] 4) There is a "double guiding" effect between the top beam and the advanced support structure, and the telescopic smoothness is good.

[0088] 5) There is no need to open coal leakage holes in the top beam, which makes it easy to maintain.

[0089] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic support, characterized in that: include: Bracket assembly (3); A top beam (1) is mounted on the support assembly (3), the support assembly (3) is used to support the top beam (1), and a receiving space (12) is formed inside the top beam (1); An advance support component (2) is at least partially installed in the accommodation space (12), and the advance support component (2) and the top beam (1) are capable of relative expansion and contraction; A first driving member (8) is arranged on the top beam (1) and connected to the advance support member (2), wherein the first driving member (8) is capable of driving the advance support member (2) to perform telescopic movement relative to the top beam (1); Wherein, the advanced support component (2) is a box-type structure.

2. The hydraulic support according to claim 1, characterized in that: The advanced support component (2) comprises a plurality of boxes (21), the plurality of boxes (21) being arranged in sequence along the width direction of the top beam (1), and at least parts of two adjacent boxes (21) being connected to each other.

3. The hydraulic support according to claim 2, characterized in that: A reinforcing component (7) is provided inside the box body (21), and the reinforcing component (7) is a reinforcing plate (72).

4. The hydraulic support according to claim 1, characterized in that: The advanced support component (2) is provided with one of a guide plate (10) and a guide rail (11) on both sides along the width direction of the top beam (1); The accommodating space (12) is provided with the other of the guide plate (10) and the guide rail (11) on both sides along the width direction of the top beam (1); The guide plate (10) is at least partially located in the guide rail (11), and the guide plate (10) cooperates with the guide rail (11) so that the advanced support component (2) can be extended and retracted relative to the top beam (1).

5. The hydraulic support according to claim 2, characterized in that: Along the width direction of the top beam (1), a plurality of the boxes (21) are arranged at intervals; At least one of the boxes (21) is provided with one of a guide plate (10) and a guide rail (11) on both sides along the width direction of the top beam (1); The accommodating space (12) is provided with the other of the guide plate (10) and the guide rail (11) on both sides along the width direction of the top beam (1); The guide plate (10) is at least partially located in the guide rail (11), and the guide plate (10) cooperates with the guide rail (11) so that the advanced support component (2) can be extended and retracted relative to the top beam (1).

6. The hydraulic support according to claim 5, characterized in that: The guide plate (10) or the guide rail (11) is arranged on one of the boxes (21).

7. The hydraulic support according to claim 1, characterized in that: Also includes: A coal leakage hole (6) is provided on a side of the advanced support component (2) close to the top beam (1) along the telescopic direction, and the coal leakage hole (6) penetrates the advanced support component (2).

8. The hydraulic support according to claim 1, characterized in that: Also includes: A guard plate (4), one end of which is rotatably mounted on a side of the advance support component (2) away from the top beam (1) in the telescopic direction, and the other end of which is movable in the height direction of the hydraulic support; The second driving member (9) is arranged on the advanced supporting member (2) and is hinged to the guard plate (4). The second driving member (9) can drive the guard plate (4) to rotate relative to the advanced supporting member (2).

9. The hydraulic support according to claim 8, characterized in that: Also includes: The ear seat (5) is welded to the advanced support component (2), and the second driving member (9) is hinged to the ear seat (5).

10. The hydraulic support according to any one of claims 1 to 9, characterized in that: The support assembly (3) comprises: Base (32); A column (34) is arranged on the base (32), and the top beam (1) is installed on the column (34); A pushing device (36) is connected to the base (32) and is used to push the base (32) to move.

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