Hydraulic support

Abstract

Provided in the present application is a hydraulic support, comprising a support assembly, a top beam, an advanced support component, and a first driving member, wherein the top beam is mounted on the support assembly, the support assembly is configured to support the top beam, and an accommodating space is formed inside the top beam; the advanced support component is at least partially mounted in the accommodating space, and the advanced support component can extend and retract relative to the top beam; the first driving member is arranged on the top beam and is connected to the advanced support component, and the first driving member can drive the advanced support component to extend and retract relative to the top beam; and the advanced support component is of a box-shaped structure. In the present application, by means of configuring the advanced support component into a box-shaped structure, the advanced support component has improved strength and thus better bending resistance, such that the advanced support component can be effectively prevented from deforming under the pressure of a top plate during advanced support operation, resulting in extension and retraction failure. Therefore, frequent maintenance of the hydraulic support is not required, thereby improving the operating efficiency.

Description

Hydraulic support

[0001] Cross Reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411262372.1, filed on September 10, 2024, and entitled "Hydraulic support", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of engineering machinery, in particular, relates to a hydraulic support. BACKGROUND

[0004] The hydraulic support is an important supporting device of the fully mechanized coal face, and its main function is to support the roof of the coal face and maintain the safe operation space. For the coal seam with broken roof condition and easy spalling, the hydraulic support roof beam part needs to be equipped with telescopic device and support device to avoid roof falling and coal wall spalling. In the related art, the hydraulic support is designed with "telescopic beam + support beam + support plate" structure to meet the requirement.

[0005] However, since the support beam has no box structure and is only hinged to the telescopic beam through a pair of pins, the support beam has high degree of freedom. The structure is complex, the cumulative manufacturing tolerance is large, and the assembly is poor. In actual production in the mine, the telescopic beam cannot be telescoped, especially the support beam is damaged, the pin is deformed, and the support plate is shaken frequently, which greatly affects the production efficiency and the safety of workers.

[0006] Therefore, how to design a hydraulic support with an advanced support structure that is not prone to damage has become a pressing problem. SUMMARY

[0007] The present application aims to at least solve one of the problems in the prior art or related art.

[0008] Therefore, the present application provides a hydraulic support.

[0009] To achieve the above-mentioned purpose, the present application provides a hydraulic support, comprising: a support assembly; a roof beam installed on the support assembly, the support assembly being used for supporting the roof beam, an internal part of the roof beam being formed with an accommodating space; an advanced support component at least partially installed in the accommodating space, and the advanced support component and the roof beam being capable of telescoping relative to each other; a first driving member arranged on the roof beam and connected with the advanced support component, the first driving member being capable of driving the advanced support component to perform telescoping movement relative to the roof beam; wherein the advanced support component is of a box type structure.

[0010] The hydraulic support provided in the application comprises a support assembly, a roof beam, an advance support component and a first driving member, an accommodating space for accommodating the advance support component is formed in the inside of the roof beam, the advance support component can perform telescopic movement along the roof beam, after the coal cutter cuts coal, the advance support component can quickly extend to timely support the exposed roof to prevent roof fall and play a role of temporary support.

[0011] Further, the advance support component is arranged in a box type structure to increase the strength and have better bending resistance, the advance support component can effectively avoid deformation under the pressure of the roof during advance support work, so that the telescopic function is not affected, the hydraulic support does not need to be frequently repaired, and the working efficiency is improved. Meanwhile, the box type advance support component is used to replace the combined structure of the telescopic beam and the roof beam, so that the product cost is reduced.

[0012] In addition, the hydraulic support provided in the application can have the following additional technical features:

[0013] In some embodiments, optionally, the advance support component comprises a plurality of boxes, the plurality of boxes are arranged in sequence along the width direction of the roof beam, and at least part of the surfaces of the adjacent two boxes are connected to each other.

[0014] In this embodiment, the advance support component in the application is composed of a plurality of boxes, the plurality of boxes are arranged in sequence along the width direction of the roof beam, and at least part of the surfaces of the adjacent two boxes are connected to each other to form an integral advance support component, the box structure has good bending resistance, so as to ensure the overall structural strength of the advance support component.

[0015] The plurality of boxes can be box structures with the same shape or different shapes.

[0016] The adjacent two boxes can be welded together through the connecting member, or a mounting plate can be additionally arranged to arrange the plurality of boxes in sequence on the mounting plate.

[0017] In some embodiments, optionally, the inside of the box is provided with a reinforcing component.

[0018] In this embodiment, the reinforcing component arranged in the inside of the box can further increase the overall strength of the box, so that the box can withstand greater external force. In addition, the reinforcing component can increase the rigidity of the box, reduce the deformation amount of the box under stress, and ensure that the advance support component can realize normal telescopic function.

[0019] In some embodiments, optionally, the reinforcing component is a reinforcing plate.

[0020] In some embodiments, optionally, one of the guide plates and the guide rails is arranged on each side of the forepoling component along the width direction of the roof beam; the other of the guide plates and the guide rails is arranged on each side of the accommodating space along the width direction of the roof beam; wherein the guide plates are at least partially located in the guide rails, and the cooperation between the guide plates and the guide rails enables the forepoling component to be telescopic relative to the roof beam.

[0021] In this embodiment, by arranging one of the guide plates and the guide rails on each side of the forepoling component along the width direction of the roof beam, and arranging the other of the guide plates and the guide rails on each side of the accommodating space inside the roof beam along the width direction of the roof beam, the accommodating space is similar to one or more grooves formed on the roof beam, and the guide plates or the guide rails are arranged on the side walls of the grooves, so that the cooperation between the guide plates and the guide rails can ensure the smoothness of the telescopic forepoling component, and the roof beam can support the forepoling component, thereby eliminating the need for setting the joist structure and the required connecting pieces, and reducing the cost.

[0022] At least two guide plates are arranged on each side of the forepoling component along the width direction of the roof beam, and at least two guide rails are arranged on each side of the accommodating space inside the roof beam along the width direction of the roof beam. Of course, at least two guide rails can also be arranged on each side of the forepoling component along the width direction of the roof beam, and at least two guide plates are arranged on each side of the accommodating space inside the roof beam along the width direction of the roof beam, to further ensure the smoothness of the telescopic forepoling component.

[0023] In some embodiments, optionally, along the width direction of the roof beam, the plurality of boxes are arranged at intervals; one of the guide plates and the guide rails is arranged on each side of at least one box along the width direction of the roof beam; the other of the guide plates and the guide rails is arranged on each side of the accommodating space along the width direction of the roof beam; wherein the guide plates are at least partially located in the guide rails, and the cooperation between the guide plates and the guide rails enables the forepoling component to be telescopic relative to the roof beam.

[0024] In this embodiment, along the width direction of the roof beam, the plurality of boxes are arranged at intervals, that is, there is a certain gap between the two connected boxes, so that the guide plates or the guide rails can be arranged on the two sides of any box, to further ensure the guiding effect between the roof beam and the forepoling component, and to strengthen the support effect of the roof beam on the forepoling component.

[0025] In some embodiments, optionally, the guide plates or the guide rails are arranged on one of the boxes.

[0026] In this embodiment, by arranging the guide plates or the guide rails on one of the boxes, the guide plates or the guide rails do not need to be arranged on all the boxes, so that the manufacturing efficiency of the hydraulic support can be improved.

[0027] Optionally, when selecting the box, the middle box is selected as much as possible to make the force on the box more uniform and avoid the side turning of the forepoling component.

[0028] In some embodiments, the hydraulic support further comprises a coal leakage hole, which is arranged on one side of the forepoling component close to the roof beam in the telescopic direction and penetrates the forepoling component.

[0029] In this embodiment, by arranging the coal leakage hole at the tail of the forepoling component, when the forepoling component is retracted after work, the broken roof received by the forepoling component is discharged through the coal leakage hole, avoiding the accumulation of broken roof on the forepoling component and affecting the telescopic performance of the forepoling component. At the same time, there is no need to open a coal leakage hole on the roof beam, and the maintainability is better.

[0030] In some embodiments, the hydraulic support further comprises a support plate, one end of the support plate is rotatably installed on one side of the forepoling component away from the roof beam in the telescopic direction, and the other end of the support plate is movable in the height direction of the hydraulic support; a second driving member is arranged on the forepoling component and is hinged to the support plate, and the second driving member can drive the support plate to rotate relative to the forepoling component.

[0031] In this embodiment, by arranging the support plate on the forepoling component and adjusting the angle of the support plate by the second driving member, the occurrence of rib spalling can be effectively inhibited. At the same time, since the forepoling component directly cooperates with the roof beam, the stability is higher, and the shaking phenomenon of the support plate during coal mining operation can be effectively prevented, and the stability of the whole hydraulic support is improved.

[0032] In some embodiments, the first driving member is a hydraulic driving member.

[0033] In some embodiments, the second driving member is a hydraulic driving member.

[0034] In some embodiments, the hydraulic support further comprises an ear seat welded on the forepoling component, and the second driving member is hinged to the ear seat.

[0035] In this embodiment, the second driving member and the forepoling component are connected through the ear seat, and the ear seat structure is welded on the forepoling component or is an integral structure inserted into the forepoling component, which has higher strength and effectively avoids the phenomena of pin shaft deformation and beam damage during forepoling operation, thereby improving the overall structural strength of the hydraulic support.

[0036] In some embodiments, the support assembly comprises a base, a column arranged on the base, and a roof beam mounted on the column, a pushing device connected to the base for pushing the base to move. In some embodiments, the support assembly comprises a base, a column arranged on the base, and a roof beam mounted on the column, a pushing device connected to the base for pushing the base to move.

[0037] In this embodiment, the support assembly comprises a base, a column and a pushing device, the base can transmit the roof pressure borne by the roof beam to the ground to provide a stable support base for the roof 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 roof beam can be adjusted according to different mining height requirements to adapt to different working face conditions. The pushing device ensures the continuous progress of the mining work by pushing the base.

[0038] In some embodiments, optionally, the support assembly further comprises a shield beam, one end of which is connected with the roof beam and the other end of which is connected with the base.

[0039] Additional aspects and advantages of the present application will become apparent in the description that follows, or will be appreciated by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the description that follows, including the figures and claims.

[0041] Fig. 1 shows a structural schematic diagram of an advanced support component of one embodiment of the present application;

[0042] Fig. 2 shows a partial structural schematic diagram of an advanced support component of one embodiment of the present application;

[0043] Fig. 3 shows a structural schematic diagram of a hydraulic support of one embodiment of the present application;

[0044] Fig. 4 shows a partial structural schematic diagram of a hydraulic support of one embodiment of the present application;

[0045] In the figures, the correspondence between the reference numerals in Figs. 1-4 and the component names is as follows: 1 roof beam, 2 advanced support component, 21 box body, 3 support assembly, 32 base, 34 column, 36 pushing device, 4 support plate, 5 ear seat; 6 coal leakage hole; 7 reinforcing component, 72 reinforcing plate, 8 first driving member, 9 second driving member, 10 guide plate, 11 guide rail, 12 containing space. DETAILED DESCRIPTION

[0046] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiment modes. 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.

[0047] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0048] A hydraulic support according to some embodiments of the present application is described below with reference to Figs. 1-4.

[0049] In one embodiment of the present application, as shown in Figs. 1-4, a hydraulic support is provided, comprising a support assembly 3, a top beam 1, an advance support component 2 and a first driving member 8, the top beam 1 is mounted on the support assembly 3, the support assembly 3 is used to support the top beam 1, an accommodating space 12 is formed in the inside of the top beam 1; the advance support component 2 is at least partially mounted 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 with the advance support component 2, 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 of a box type structure.

[0050] According to the hydraulic support provided by the present application, the hydraulic support comprises a support assembly 3, a top beam 1, an advance support component 2 and a first driving member 8, an accommodating space 12 for accommodating the advance support component 2 is formed in the inside of the top beam 1, and the advance support component 2 can perform telescopic movement along the top beam 1; after the coal cutter of the coal mining machine cuts coal, the advance support component 2 can be quickly extended to timely support the exposed roof and prevent the roof from falling, thereby playing a role of temporary support.

[0051] Further, the present application sets the advance support component 2 to be of a box type structure, so that the strength of the advance support component 2 is increased and the advance support component 2 has better bending resistance, which can effectively avoid the advance support component 2 from being deformed due to the pressure of the roof during the advance support work, so that the advance support component 2 cannot be telescopic, thereby not needing to frequently maintain the hydraulic support and improving the work efficiency. Meanwhile, the advance support component 2 of the box type structure is used to replace the combined structure of the telescopic beam and the supporting beam, so that the product cost can be reduced.

[0052] In some embodiments, as shown in Fig. 1, the advance support component 2 comprises a plurality of boxes 21, the plurality of boxes 21 are arranged in sequence along the width direction of the top beam 1, and at least part of the adjacent two boxes 21 are connected with each other.

[0053] In this embodiment, the advance support component 2 in the present application is composed of a plurality of boxes 21, the plurality of boxes 21 are arranged in sequence along the width direction of the top beam 1, at least part of the surfaces of the adjacent two boxes 21 are connected with each other to form an integral advance support component 2, and the box 21 structure has better bending resistance, thereby ensuring the overall structural strength of the advance support component 2.

[0054] The plurality of boxes 21 can be of the same box 21 structure or different box 21 structures.

[0055] The adjacent two boxes 21 can be welded together through a connecting member, or a mounting plate can be additionally provided to arrange the plurality of boxes 21 in intervals on the mounting plate.

[0056] In some embodiments, as shown in FIG. 2, the inside of the box 21 is provided with a reinforcing component 7.

[0057] In this embodiment, by providing the reinforcing component 7 inside the box 21, the overall strength of the box 21 can be further increased, so that it can withstand greater external forces. And the reinforcing component 7 can increase the stiffness of the box 21, reduce the deformation amount of the box 21 when stressed, and ensure that the forepoling component 2 can realize normal extension and retraction functions.

[0058] In some embodiments, the reinforcing component 7 is a reinforcing plate 72.

[0059] In some embodiments, as shown in FIGS. 2 and 4, one of the guide plates 10 and the guide rails 11 is provided on both sides of the forepoling component 2 along the width direction of the roof beam 1; the other one of the guide plates 10 and the guide rails 11 is provided on both sides of the accommodating space 12 along the width direction of the roof beam 1; wherein the guide plate 10 is at least partially located in the guide rail 11, and through the cooperation of the guide plate 10 and the guide rail 11, the forepoling component 2 can be extended and retracted relative to the roof beam 1.

[0060] In this embodiment, by providing one of the guide plates 10 and the guide rails 11 on both sides of the forepoling component 2 along the width direction of the roof beam 1, and providing the other one of the guide plates 10 and the guide rails 11 on both sides of the accommodating space 12 inside the roof beam 1 along the width direction of the roof beam 1, the accommodating space 12 is similar to one or more recesses formed on the roof beam 1, and the guide plate 10 or the guide rail 11 is arranged on the side wall of the recess, so that through the cooperation between the guide plate 10 and the guide rail 11, on the one hand, the extension and retraction smoothness of the forepoling component 2 can be ensured, and on the other hand, the roof beam 1 can be used to support the forepoling component 2, so that there is no need to set up a joist structure and the required connecting pieces, and the cost is lower.

[0061] At least two guide plates 10 are arranged on each side of the forepoling component 2 along the width direction of the roof beam 1, and at least two guide rails 11 are arranged on each side of the accommodating space 12 inside the roof beam 1 along the width direction of the roof beam 1. Of course, at least two guide rails 11 can also be arranged on each side of the forepoling component 2 along the width direction of the roof beam 1, and at least two guide plates 10 can be arranged on each side of the accommodating space 12 inside the roof beam 1 along the width direction of the roof beam 1, to further ensure the extension and retraction smoothness of the forepoling component 2.

[0062] In some embodiments, the plurality of boxes are arranged at intervals along the width direction of the roof 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 roof beam 1; the accommodating space 12 is provided with the other one of the guide plates 10 and the guide rails 11 on both sides along the width direction of the roof beam 1; wherein the guide plates 10 are at least partially located in the guide rails 11, and the advance support component 2 can be extended and retracted relative to the roof beam 1 through cooperation of the guide plates 10 and the guide rails 11.

[0063] In this embodiment, the plurality of boxes 21 are arranged at intervals along the width direction of the roof beam 1, that is, there is a certain gap between the two connected boxes 21, so that the guide plates 10 or the guide rails 11 structure can be arranged on both sides of any box 21, further ensuring the guiding effect between the roof beam 1 and the advance support component 2, and at the same time, strengthening the support effect of the roof beam 1 on the advance support component 2.

[0064] In some embodiments, as shown in FIG. 2, the guide plates 10 or the guide rails 11 are arranged on one of the boxes 21.

[0065] In this embodiment, by arranging the guide plates 10 or the guide rails 11 only on one of the boxes 21, it is not necessary to arrange the guide plates 10 or the guide rails 11 on all the boxes 21, so that the manufacturing efficiency of the hydraulic support can be improved.

[0066] At least two guide plates 10 are arranged on each side of the box 21 along the width direction of the roof beam 1, and at least two guide rails 11 are arranged on each side of the accommodating space 12 inside the roof beam 1 along the width direction of the roof beam 1. Of course, at least two guide rails 11 can also be arranged on each side of the box 21 along the width direction of the roof beam 1, and at least two guide plates 10 are arranged on each side of the accommodating space 12 inside the roof beam 1 along the width direction of the roof beam 1, further ensuring the smoothness of the extension and retraction of the advance support component 2.

[0067] Optionally, when selecting the box 21, the middle box 21 is selected as much as possible, so that the stress on the box 21 is more uniform, and the side turning of the advance support component 2 under stress is avoided.

[0068] In some embodiments, as shown in FIGS. 1 and 4, the hydraulic support further comprises a coal leakage hole 6 arranged on one side of the advance support component 2 close to the roof beam 1 along the extension and retraction direction, and the coal leakage hole 6 penetrates the advance support component 2.

[0069] In this embodiment, the coal leakage hole 6 is arranged at the tail of the advance support component 2, so that when the advance support component 2 is retracted after the work is completed, the broken roof received by the advance support component 2 is discharged through the coal leakage hole 6, thereby avoiding the broken roof from being accumulated on the advance support component 2 and affecting the retracting performance of the advance support component 2. Meanwhile, the coal leakage hole 6 does not need to be arranged on the roof beam 1, and the maintainability is better.

[0070] In some embodiments, optionally, the hydraulic support further comprises a guard plate 4, one end of the guard plate 4 is rotatably installed on one side of the advance support component 2 away from the roof beam 1 in the retracting direction, and the other end of the guard plate 4 is movable in the height direction of the hydraulic support; and a second driving member 9 is arranged on the advance support component 2 and is hinged to the guard plate 4, and the second driving member 9 is capable of driving the guard plate 4 to rotate relative to the advance support component 2.

[0071] In this embodiment, by arranging some guard plates 4 on the advance support component 2 and adjusting the angle of the guard plate 4 by the second driving member 9, the occurrence of the spalling can be effectively inhibited. Meanwhile, since the advance support component 2 directly cooperates with the roof beam 1, the stability is higher, and the phenomenon of the guard plate 4 shaking during the coal mining operation can be effectively prevented, thereby improving the stability of the whole hydraulic support.

[0072] In some embodiments, optionally, the first driving member 8 is a hydraulic driving member.

[0073] In some embodiments, optionally, the second driving member 9 is a hydraulic driving member.

[0074] In some embodiments, optionally, as shown in FIG. 1 and FIG. 4, the hydraulic support further comprises an ear seat 5 welded on the advance support component 2, and the second driving member 9 is hinged to the ear seat 5.

[0075] In this embodiment, the second driving member 9 and the advance support component 2 are connected through the ear seat 5, the ear seat 5 is welded on the advance support component 2, or the ear seat 5 is an integral structure inserted into the inside of the advance support component 2, which has higher strength and can effectively avoid the phenomenon of pin shaft deformation and beam damage during the advance support operation, thereby improving the overall structural strength of the hydraulic support.

[0076] In some embodiments, optionally, as shown in FIG. 3, the support assembly 3 comprises a base 32, a column 34 arranged on the base 32, and a roof beam 1 installed on the column 34, and a pushing device 36 connected to the base 32 and used for pushing the base 32 to move.

[0077] In this embodiment, the support assembly 3 includes a base 32, a column 34 and a pushing device 36. The base 32 can transmit the roof pressure borne by the roof beam 1 to the ground to provide a stable support foundation for the roof 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 roof beam 1 can be adjusted according to different mining height requirements to adapt to different working face conditions. The pushing device 36 pushes the base 32 to ensure the continuous progress of the mining work.

[0078] In some embodiments, the support assembly 3 further includes a canopy beam, one end of which is connected to the roof beam 1 and the other end of which is connected to the base 32.

[0079] In an embodiment of the present application, a kind of advance support and roof beam structure and the hydraulic support using the structure are provided, advance support structure (advance support component 2) has left, middle, right three box bodies 21, with better bending capacity, ear seat 5 structure is directly articulated with the support help jack (second driving part) on middle box body, ear seat 5 structure is welded into the whole structure and inserts box body 21 inside, with higher strength, effectively avoid the phenomenon that pin shaft deformation, support beam damage easily occur when advance support action, middle box body two sides are equipped with first guide plate (guide plate 10) and second guide plate (guide plate 10). Top beam body middle slot is grooved, double slide (guide rail 11) is set on middle slot, corresponding to advance support structure, while ensuring the overall structure strength, top beam does not need to open leakage coal hole. More importantly, completely avoid the problems existing in " telescopic beam + support beam " structure, with better adaptability and economy.

[0080] Problems of related art hydraulic support:

[0081] Hydraulic support is an important support equipment of fully mechanized working face, which mainly supports the roof of the mining field and maintains the safe operation space. For broken roof conditions and coal seams prone to spalling, the hydraulic support roof beam part needs to have telescopic device and support device to avoid roof falling and coal wall spalling. To meet this requirement, the current hydraulic support design adopts " telescopic beam + support beam + support plate " structure. To ensure the operation space of the coal mining machine, the middle part of the existing " telescopic beam + support beam " structure is generally weak. The support beam has no box body structure and is only articulated with the telescopic beam through a pair of pin shafts, so the support beam has high freedom. This structure is complex in process, has large cumulative manufacturing tolerance and is poor in assembly. In actual production in the mine, the telescopic beam cannot be telescoped due to deformation, especially the support beam is damaged, the pin shaft is deformed and the support plate is shaken frequently, so the underground work has to be replaced and repaired, which greatly affects the production efficiency and the safety of workers.

[0082] As shown in Fig. 3, the roof beam component in the application is composed of a roof beam body (roof beam 1), a forepoling device (forepoling component 2), a rib support plate 4, and a hydraulic system and a jack, wherein the roof beam body mainly bears the periodic roof pressure, avoids the falling of gangue into the pedestrian area caused by the roof falling and roof caving during coal mining, the forepoling device plays a role in avoiding the broken roof caving, and the rib support plate 4 can effectively inhibit the occurrence of rib spalling.

[0083] As shown in Fig. 1, Fig. 2 and Fig. 4, the roof beam body is provided with a chute (guide rail 11) on both sides of the middle slot. The forepoling structure is composed of left, middle and right three box bodies 21, and the box body 21 is provided with a reinforcing plate 72. The middle box body is provided with a first guide plate (guide plate 10) and a second guide plate (guide plate 10) on both sides, and the tail part is provided with a coal leakage hole 6. The forepoling structure is inserted into the cavity of the roof beam body, and the telescopic jack is connected with the upper ear seat and the ear plate of the roof beam body by using a pin shaft. The forepoling structure is actuated by the telescopic jack (first driving member 8), so as to achieve the purpose of forepoling, effectively avoid the occurrence of roof falling and rib spalling accidents, and the ear seat 5 is welded in the box body in a "rooting" manner. The rib support plate 4 is hinged with the rib support jack cylinder head through a pin shaft; the rib support jack cylinder bottom is hinged with the forepoling structure, and the rib support jack (second driving member 9) is telescoped to realize the opening and retracting action of the rib support plate 4.

[0084] The hydraulic support provided by the application has the following advantages:

[0085] 1) The problem of rib support "shaking" and telescopic jamming during forepoling in the process of coal mining is solved.

[0086] 2) There is no need for a support beam structure and the required connecting parts, and the cost is lower.

[0087] 3) The forepoling structure has a three-section box structure, and has strong bending resistance.

[0088] 4) The roof beam and the forepoling structure have a "double guide" effect, and the telescopic smoothness is good.

[0089] 5) The roof beam does not need to be provided with a coal leakage hole, and has good maintainability.

[0090] In the description of the application, the term "a plurality" means two or more, unless otherwise expressly specified. The terms "upper", "lower", and the like, indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. The terms "connected", "mounted", "fixed" and the like should be interpreted broadly, for example, "connected" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0091] In the description of the application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like are intended to mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present application, the illustrative description 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.

[0092] The above is only an optional embodiment of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A hydraulic support, characterized in that, The hydraulic support comprises: a support assembly (3); a top beam (1) mounted on the support assembly (3), the support assembly (3) being used for supporting the top beam (1), an accommodating space (12) being formed in the inside of the top beam (1); a forepoling component (2) at least partially mounted in the accommodating space (12), and the forepoling component (2) and the top beam (1) being capable of relative expansion and contraction; a first driving member (8) arranged on the top beam (1) and connected with the forepoling component (2), the first driving member (8) being capable of driving the forepoling component (2) to perform expansion and contraction relative to the top beam (1); wherein the forepoling component (2) is in a box type structure.

2. The hydraulic support according to claim 1, characterized in that The forepoling 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 part of adjacent two boxes (21) being connected with each other.

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

4. The hydraulic support according to claim 1, wherein one of a guide plate (10) and a guide rail (11) is arranged on both sides of the forepoling component (2) along the width direction of the top beam (1); the other of the guide plate (10) and the guide rail (11) is arranged on both sides of the accommodating space (12) 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 forepoling component (2) is capable of expansion and contraction relative to the top beam (1) through cooperation of the guide plate (10) and the guide rail (11).

5. The hydraulic support according to claim 2, wherein a plurality of the boxes (21) are arranged at intervals along the width direction of the top beam (1); one of a guide plate (10) and a guide rail (11) is arranged on both sides of at least one of the boxes (21) along the width direction of the top beam (1); the other of the guide plate (10) and the guide rail (11) is arranged on both sides of the accommodating space (12) 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 forepoling component (2) is capable of expansion and contraction relative to the top beam (1) through cooperation of the guide plate (10) and the guide rail (11).

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

7. The hydraulic support of claim 1, wherein, Further comprising: a coal leakage hole (6) arranged on the side of the forepoling component (2) close to the top beam (1) in the expansion and contraction direction, the coal leakage hole (6) penetrating the forepoling component (2).

8. The hydraulic support of claim 1, wherein, Further comprising: a support plate (4), one end of the support plate (4) being rotatably mounted on the side of the forepoling component (2) away from the top beam (1) in the expansion and contraction direction, and the other end of the support plate (4) being capable of moving along the height direction of the hydraulic support. A second driving member (9) is arranged on the advance support member (2) and is hinged to the support plate (4), and the second driving member (9) can drive the support plate (4) to rotate relative to the advance support member (2).

9. The hydraulic support according to claim 8, characterized in that Further comprising: An ear seat (5) is welded on the advance support member (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: A 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 with the base (32) and is used for pushing the base (32) to move.

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