A hydraulic arm device for adjusting and retracting frames at a fully-mechanized coal mining face

Abstract

The application discloses a kind of hydraulic arm devices of adjusting frame auxiliary for fully mechanized working face withdrawal, and relates to support withdrawal technical field.The hydraulic arm devices of adjusting frame auxiliary for fully mechanized working face withdrawal, including hydraulic support and the hydraulic support base being set in its bottom, further include the auxiliary hydraulic assembly being set in the one end of hydraulic support base, the auxiliary hydraulic assembly is used to with hydraulic support base and hydraulic support is assisted to withdraw, fixed frame being installed in one side of hydraulic support base.The hydraulic arm devices of adjusting frame auxiliary for fully mechanized working face withdrawal, for reliably connecting auxiliary hydraulic assembly with hydraulic support base, its simple structure, convenient operation, action is reliable, can be quickly disassembled and assembled, greatly improve the work efficiency of hydraulic support withdrawal and support frame operation progress, and safety factor is high, and reliability is high, improve labor efficiency, save manpower cost, improve work efficiency, greatly improve the operation efficiency during support withdrawal operation.

Description

Technical Field

[0001] This invention relates to the field of support retraction technology, specifically to a hydraulic arm device for adjusting supports during the retraction of a fully mechanized mining face. Background Technology

[0002] Fully mechanized coal mining is a longwall mining technique involving underground mining. It is suitable for stable coal seams, hard roofs, and gently dipping medium-thick coal seams without faults, as well as for layered longwall mining of thick coal seams. Fully mechanized mining is generally defined as a mechanization rate of over 95%. A fully mechanized longwall face is a coal face equipped with fully mechanized equipment underground. The conditions include using a coal mining machine, flexible scraper conveyors for transporting materials, hydraulic supports for roof support, and belt conveyors in the roadway. The length of the longwall face, i.e., the length of the coal face between the transport roadway and the return airway, is an important parameter of the longwall face. It should be selected based on factors such as the geological conditions of the longwall face, equipment capacity, mining technology, economic advantages, and technical rationality. In gently dipping, thin, and medium-thick coal seams, the reasonable working face lengths are: 80–150m for blasting mining faces; 120–150m for conventional mechanized mining faces; and over 150m for fully mechanized mining faces.

[0003] The retreat operation of the fully mechanized mining face in coal mines is a key link in mine safety management. The most important procedure during the retreat is the retreat of the hydraulic supports. During the retreat of the working face, various dual-speed winches are generally used in conjunction with single hydraulic props to pull and remove the supports.

[0004] However, because hydraulic supports are arranged along the working face, and winches are generally arranged along the working face, the direction of the wire rope pulling during winch relocation is perpendicular to the support installation position. During relocation, a reverse pulley must be used to move the support forward to complete the removal and repositioning. However, due to the weight of the hydraulic supports, accidents such as rope breakage and hook slippage injuries are prone to occur during winch wire rope relocation. In the past, when using winches in conjunction with single hydraulic props for support removal, at least three people (winch operator, signalman, and single prop operator) were required to complete the operation, resulting in low efficiency. During the removal process, the direction of the winch wire rope and the support position of the single hydraulic prop need to be constantly adjusted to move the hydraulic support forward. On average, it takes one hour to complete the removal of one hydraulic support, resulting in a long operation time. Therefore, we propose a hydraulic arm device for support adjustment assistance during fully mechanized mining face relocation to solve the above problems. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an auxiliary hydraulic arm device for adjusting the support frame during the retreat of a fully mechanized mining face. This device solves the problems of easy rope breakage and hook-swing injuries during winch wire rope pulling, as well as low efficiency and long operation time.

[0007] Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary hydraulic arm device for retraction of a fully mechanized mining face, comprising a hydraulic support and a hydraulic support base disposed at its bottom, and an auxiliary hydraulic component disposed at one end of the hydraulic support base. The auxiliary hydraulic component is used to assist in retraction with the hydraulic support base and the hydraulic support. A fixed frame is installed on one side of the hydraulic support base, and the auxiliary hydraulic component is disposed below the fixed frame. The hydraulic support base and the fixed frame are connected by two sets of bolts, and the fixed frame is used to connect the auxiliary hydraulic component to the hydraulic support base.

[0009] Furthermore, the hydraulic support includes a beam, columns, and hydraulic supports. Multiple columns are provided, all of which are located at the bottom of the beam. The hydraulic supports are installed at the lower ends of the columns, and the number of hydraulic supports corresponds to the number of columns. The lower ends of the multiple hydraulic supports are installed on the base of the hydraulic support.

[0010] Furthermore, mounting grooves are respectively provided on both sides of the upper part of the hydraulic support base, and the lower end of the hydraulic support is installed in the mounting groove.

[0011] Furthermore, the hydraulic support base is H-shaped and is used to install and support the hydraulic support.

[0012] Furthermore, the fixing frame includes a fixing plate, a mounting plate, and a diagonal brace plate. The fixing plate is vertically arranged, the mounting plate is horizontally placed, the fixing plate is welded to the mounting plate, and the fixing plate has an L-shaped cross-section. The fixing plate is located on one side of the bolt structure, and the auxiliary hydraulic components are located at the bottom of the mounting plate and the top of the hydraulic support base.

[0013] Furthermore, two diagonal bracing plates are connected and installed on the fixing plate and the mounting plate. The length of the two diagonal bracing plates matches the width of the corresponding position on the mounting plate. The diagonal bracing plates are used to improve the stability of the connection between the fixing plate and the mounting plate.

[0014] Furthermore, the bolt structure includes a mounting block and a connecting bolt. The mounting block is welded to the hydraulic support base, and the connecting bolt passes through the mounting block and the fixing plate. The connecting bolt is used to reliably connect the mounting block and the fixing plate.

[0015] Furthermore, the auxiliary hydraulic assembly includes a hydraulic control valve group, a connecting pipe, a hydraulic structure, and a movable connecting structure. The hydraulic control valve group is mounted on the hydraulic support base. The connecting pipe is mounted on one side of the hydraulic control valve group and is a high-pressure hose. The connecting pipe passes through the fixed plate, two diagonal bracing plates, and the mounting plate in sequence and is connected to the hydraulic structure. The hydraulic structure is mounted on the bottom of the mounting plate and is used to control the movement of the movable connecting structure. The movable connecting structure is mounted on the hydraulic structure and is used to connect with the external support push-pull device.

[0016] Furthermore, the hydraulic structure includes an auxiliary hydraulic arm and a telescopic cylinder. The telescopic cylinder is installed inside the auxiliary hydraulic arm. The lower end of the connecting pipe extends into the auxiliary hydraulic arm and is connected to the telescopic cylinder. The movable connecting structure is installed at the end of the telescopic cylinder away from the auxiliary hydraulic arm and on the outside of the auxiliary hydraulic arm. One end of the auxiliary hydraulic arm is installed at the bottom of the mounting plate.

[0017] Furthermore, the movable connection structure includes a mounting component, a pulley device, a connecting chain, and a spare chain buckle. The mounting component is installed at the end of the telescopic cylinder away from the auxiliary hydraulic arm. The pulley device is installed in the mounting component. The connecting chain is sleeved on the outside of the pulley device. The spare chain buckle is installed on the side of the auxiliary hydraulic arm near the hydraulic support base. The spare chain buckle is used to connect a spare chain.

[0018] Beneficial effects

[0019] The present invention has the following beneficial effects:

[0020] (1) The auxiliary hydraulic arm device for the withdrawal of the longwall mining face is used in conjunction with the auxiliary hydraulic components, fixed frame, connecting bolts and mounting blocks to reliably connect the auxiliary hydraulic components with the hydraulic support base. It has a simple structure, is easy to operate, has reliable action and can be quickly disassembled and assembled, which greatly improves the working efficiency of hydraulic support withdrawal and the progress of support removal operation.

[0021] (2) The auxiliary hydraulic arm device for the withdrawal of the longwall mining face optimizes the withdrawal operation during the withdrawal of the working face by using auxiliary hydraulic components, fixed frame, bolt structure and mounting block. It eliminates the safety risks of wire rope breakage, hook injury and single column breakage during the traction withdrawal of the working face by using winch with single hydraulic support. It has a high safety factor and high reliability.

[0022] (3) The hydraulic arm device for adjusting the support for the longwall mining face is used for withdrawal. With the help of hydraulic system, it can be withdrawn. One person can operate it and complete the traction and withdrawal of the hydraulic support within 30 minutes. This improves labor efficiency, saves labor costs, and enhances work efficiency, greatly improving the operating efficiency during the support withdrawal operation.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 For the present invention Figure 1 A structural diagram from another perspective.

[0026] Figure 3 This is a schematic diagram of the structure of the fixing plate and connecting pipe of the present invention.

[0027] Figure 4 This is a schematic diagram of the mounting block and connecting bolts of the present invention.

[0028] Figure 5 This is a schematic diagram of the auxiliary hydraulic arm and the fixed frame of the present invention.

[0029] Figure 6 This is a schematic diagram of the auxiliary hydraulic arm and telescopic cylinder of the present invention.

[0030] In the diagram, 1. Beam; 2. Column; 3. Hydraulic support; 4. Hydraulic support base; 5. Mounting slot; 6. Mounting block; 7. Fixing frame; 71. Fixing plate; 72. Mounting plate; 73. Diagonal brace plate; 8. Connecting bolt; 9. Hydraulic control valve group; 10. Connecting pipe; 11. Auxiliary hydraulic arm; 12. Telescopic cylinder; 13. Mounting component; 14. Pulley device; 15. Connecting chain; 16. Spare chain buckle. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0033] Please see Figures 1-6 This invention provides a technical solution: an auxiliary hydraulic arm device for retraction of a fully mechanized mining face, comprising a hydraulic support and a hydraulic support base 4 disposed at its bottom, and an auxiliary hydraulic component disposed at one end of the hydraulic support base 4. The auxiliary hydraulic component is used to assist in retraction with the hydraulic support base 4 and the hydraulic support. A fixed frame 7 is installed on one side of the hydraulic support base 4, and the auxiliary hydraulic component is disposed below the fixed frame 7. The hydraulic support base 4 and the fixed frame 7 are connected by two sets of bolts. The fixed frame 7 is used to connect the auxiliary hydraulic component to the hydraulic support base 4.

[0034] Specifically, the hydraulic support includes a beam 1, columns 2, and hydraulic supports 3. Multiple columns 2 are provided, and all columns 2 are located at the bottom of the beam 1. The hydraulic supports 3 are installed at the lower end of the columns 2, and the number of hydraulic supports 3 corresponds to the number of columns 2. The lower ends of the multiple hydraulic supports 3 are installed on the hydraulic support base 4.

[0035] In this embodiment, the hydraulic support 3 is welded and installed below the column 2 and on the upper end of the hydraulic support base 4, for moving the beam 1 up and down.

[0036] Specifically, mounting grooves 5 are provided on both sides of the upper part of the hydraulic support base 4, and the lower end of the hydraulic support column 3 is installed in the mounting grooves 5.

[0037] In this embodiment, the installation slot 5 is used to install multiple hydraulic supports 3.

[0038] Specifically, the hydraulic support base 4 is H-shaped and is used to install and support the hydraulic support.

[0039] In this implementation scheme, the H-shaped design provides stable support for the hydraulic support as a whole, resulting in good support performance.

[0040] Specifically, the fixing frame 7 includes a fixing plate 71, a mounting plate 72, and a diagonal brace plate 73. The fixing plate 71 is vertically arranged, the mounting plate 72 is horizontally placed, the fixing plate 71 and the mounting plate 72 are welded together, and the cross section is L-shaped. The fixing plate 71 is located on one side of the bolt structure, and the auxiliary hydraulic components are located at the bottom of the mounting plate 72 and the top of the hydraulic support base 4.

[0041] In this embodiment, the fixing plate 71 and the mounting plate 72 are welded together, and the fixing plate 71 is connected to the hydraulic support base 4 by bolts. The mounting plate 72 is connected to the auxiliary hydraulic components, which is used to connect the auxiliary hydraulic components and the hydraulic support base 4.

[0042] Specifically, two diagonal bracing plates 73 are connected and installed on the fixing plate 71 and the mounting plate 72. The length of the two diagonal bracing plates 73 matches the width of the corresponding position of the mounting plate 72. The diagonal bracing plates 73 are used to improve the stability of the connection between the fixing plate 71 and the mounting plate 72.

[0043] In this embodiment, the diagonal bracing plate 73 is welded to the fixing plate 71 and the mounting plate 72 respectively.

[0044] Specifically, the bolt structure includes a mounting block 6 and a connecting bolt 8. The mounting block 6 is welded onto the hydraulic support base 4, and the connecting bolt 8 passes through the mounting block 6 and the fixing plate 71. The connecting bolt 8 is used to reliably connect the mounting block 6 and the fixing plate 71.

[0045] In this embodiment, the connecting bolts 8 pass through the mounting block 6 and the fixing plate 71. Tightening the bolts ensures that the mounting block 6 and the fixing plate 71 are tightly attached, thus preventing movement.

[0046] Specifically, the auxiliary hydraulic components include a hydraulic control valve group 9, a connecting pipe 10, a hydraulic structure, and a movable connection structure. The hydraulic control valve group 9 is mounted on the hydraulic support base 4. The connecting pipe 10 is mounted on one side of the hydraulic control valve group 9. The connecting pipe 10 is a high-pressure hose. The connecting pipe 10 passes through the fixed plate 71, the two inclined support plates 73, and the mounting plate 72 in sequence, and is connected to the hydraulic structure. The hydraulic structure is mounted on the bottom of the mounting plate 72. The hydraulic structure is used to control the movement of the movable connection structure. The movable connection structure is mounted on the hydraulic structure and is used to connect with the external support push-pull device.

[0047] In this embodiment, the hydraulic control valve group 9 is mounted on the hydraulic support base 4 by screws and is threadedly connected to the connecting pipe 10, and is used to control the operation of the telescopic cylinder 12 and the hydraulic support 3 in the hydraulic structure.

[0048] Specifically, the hydraulic structure includes an auxiliary hydraulic arm 11 and a telescopic cylinder 12. The telescopic cylinder 12 is installed inside the auxiliary hydraulic arm 11. The lower end of the connecting pipe 10 extends into the auxiliary hydraulic arm 11 and is connected to the telescopic cylinder 12. A movable connecting structure is installed at the end of the telescopic cylinder 12 away from the auxiliary hydraulic arm 11 and on the outside of the auxiliary hydraulic arm 11. One end of the auxiliary hydraulic arm 11 is installed at the bottom of the mounting plate 72.

[0049] In this embodiment, the lower end of the connecting pipe 10 is threadedly connected to the telescopic cylinder 12, which facilitates the hydraulic control valve group 9 to control the telescopic cylinder 12 to operate. One end of the telescopic cylinder 12 is connected to one end of the auxiliary hydraulic arm 11 through a screw. One end of the auxiliary hydraulic arm 11 is welded and installed at the bottom of the mounting plate 72 for connection with the hydraulic support base 4.

[0050] Specifically, the movable connection structure includes a mounting component 13, a pulley device 14, a connecting chain 15, and a spare chain buckle 16. The mounting component 13 is installed at the end of the telescopic cylinder 12 away from the auxiliary hydraulic arm 11. The pulley device 14 is installed in the mounting component 13. The connecting chain 15 is sleeved on the outside of the pulley device 14. The spare chain buckle 16 is installed on the side of the auxiliary hydraulic arm 11 near the hydraulic support base 4. The spare chain buckle 16 is used to connect a spare chain.

[0051] In this embodiment, the mounting component 13 is welded to one end of the telescopic cylinder 12, and the pulley device 14 is bolted to the mounting component 13. It is connected to the external push-pull device through the connecting chain 15 and is used to drive the hydraulic support base 4 and the hydraulic support to move. The spare chain buckle 16 is welded to one side of the auxiliary hydraulic arm 11 and is used to connect with the chain in case of damage to the pulley device 14, etc., to ensure the stability of the movement.

[0052] Before the support is withdrawn, the fixed plate 71 in the fixed frame 7 is connected by the connecting bolts 8 and the mounting block 6. Since the auxiliary hydraulic arm 11 is welded to the bottom of the fixed plate 71 and the mounting block 6 is welded to the hydraulic support base 4, the auxiliary hydraulic arm 11 and the hydraulic support base 4 can be reliably connected. When the support is withdrawn, the telescopic cylinder 12 and the connecting chain 15 are extended to a suitable position (aligned with the hydraulic support to be withdrawn) by controlling the operation of the hydraulic control valve group 9. The connecting chain 15 is passed through the pulley device 14, and then a special chain and shackle are used to connect to the external push-pull device. After the connecting chain 15 connected to one end of the auxiliary hydraulic arm 11 is tensioned, the hydraulic support and the hydraulic support base 4 can be moved forward to complete the support withdrawal operation. After the support is withdrawn, the support can be adjusted and moved normally by the winch wire rope traction.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A hydraulic arm device for adjusting the support frame during the retreat of a fully mechanized mining face, comprising a hydraulic support frame and a hydraulic support base (4) disposed at its bottom, characterized in that, Also includes: An auxiliary hydraulic component is provided at one end of the hydraulic support base (4), the auxiliary hydraulic component being used to assist in retraction with the hydraulic support base (4) and the hydraulic support; A fixed frame (7) is installed on one side of the hydraulic support base (4). The auxiliary hydraulic component is located below the fixed frame (7). The hydraulic support base (4) and the fixed frame (7) are connected by two sets of bolts. The fixed frame (7) is used to connect the auxiliary hydraulic component to the hydraulic support base (4). The fixing frame (7) includes a fixing plate (71), a mounting plate (72) and a bracing plate (73). The fixing plate (71) is vertically arranged, and the mounting plate (72) is horizontally placed. The fixing plate (71) and the mounting plate (72) are welded together and have an L-shaped cross section. The fixing plate (71) is located on one side of the bolt structure. The auxiliary hydraulic components are located at the bottom of the mounting plate (72) and the top of the hydraulic support base (4). Two diagonal bracing plates (73) are connected and installed on the fixed plate (71) and the mounting plate (72). The length of the two diagonal bracing plates (73) matches the width of the corresponding position of the mounting plate (72). The diagonal bracing plates (73) are used to improve the stability of the connection between the fixed plate (71) and the mounting plate (72). The auxiliary hydraulic assembly includes a hydraulic control valve group (9), a connecting pipe (10), a hydraulic structure, and a movable connection structure. The hydraulic control valve group (9) is installed on the hydraulic support base (4). The connecting pipe (10) is installed on one side of the hydraulic control valve group (9). The connecting pipe (10) is a high-pressure hose. The connecting pipe (10) passes through the fixed plate (71), two inclined support plates (73), and the mounting plate (72) in sequence, and is connected to the hydraulic structure. The hydraulic structure is installed at the bottom of the mounting plate (72). The hydraulic structure is used to control the movement of the movable connection structure. The movable connection structure is installed on the hydraulic structure and is used to connect with the external support push-pull device.

2. The hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 1, characterized in that: The hydraulic support includes a beam (1), columns (2) and hydraulic supports (3). Multiple columns (2) are provided, and multiple columns (2) are located at the bottom of the beam (1). The hydraulic supports (3) are installed at the lower end of the columns (2). The number of hydraulic supports (3) corresponds to the number of columns (2). The lower ends of multiple hydraulic supports (3) are installed on the hydraulic support base (4).

3. The hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 2, characterized in that: The hydraulic support base (4) has mounting slots (5) on both sides above it, and the lower end of the hydraulic support (3) is installed in the mounting slots (5).

4. The auxiliary hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 1, characterized in that: The hydraulic support base (4) is H-shaped and is used to install and support the hydraulic support.

5. The hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 1, characterized in that: The bolt structure includes a mounting block (6) and a connecting bolt (8). The mounting block (6) is welded to the hydraulic support base (4). The connecting bolt (8) passes through the mounting block (6) and the fixing plate (71). The connecting bolt (8) is used to reliably connect the mounting block (6) and the fixing plate (71).

6. The hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 1, characterized in that: The hydraulic structure includes an auxiliary hydraulic arm (11) and a telescopic cylinder (12). The telescopic cylinder (12) is installed inside the auxiliary hydraulic arm (11). The lower end of the connecting pipe (10) extends into the auxiliary hydraulic arm (11) and is connected to the telescopic cylinder (12). The movable connecting structure is installed at the end of the telescopic cylinder (12) away from the auxiliary hydraulic arm (11) and on the outside of the auxiliary hydraulic arm (11). One end of the auxiliary hydraulic arm (11) is installed at the bottom of the mounting plate (72).

7. The hydraulic arm device for adjusting the support frame for retreating a fully mechanized mining face according to claim 6, characterized in that: The movable connection structure includes a mounting component (13), a pulley device (14), a connecting chain (15), and a spare chain buckle (16). The mounting component (13) is installed at the end of the telescopic cylinder (12) away from the auxiliary hydraulic arm (11). The pulley device (14) is installed in the mounting component (13), and the connecting chain (15) is sleeved on the outside of the pulley device (14). The spare chain buckle (16) is installed on the side of the auxiliary hydraulic arm (11) near the hydraulic support base (4), and the spare chain buckle (16) is used to connect the spare chain.

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