Hydraulic support

Abstract

The present invention discloses a hydraulic support, comprising a base, a top plate, a first hydraulic cylinder, and a locking member. The first hydraulic cylinder is movably connected to the base and vertically arranged. The top plate is movably connected to the top end of the first hydraulic cylinder. The front end of the top plate is provided with a flap that can swing up and down and a first driving member that can drive the flap to rotate. The top plate is also provided with an auxiliary arm connected to the base. The locking member can lock the auxiliary arm and the base so that the auxiliary arm cannot move up and down relative to the base, or the locking member can release the auxiliary arm so that the auxiliary arm can move up and down relative to the base. The hydraulic support of the present invention is additionally provided with a locking member. When the hydraulic cylinder of the hydraulic support fails due to the impact of an explosion, the locking member can replace the hydraulic cylinder to support the top plate of the hydraulic support, preventing the top plate from falling and improving the safety of the top coal mining process.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine equipment, in particular to a hydraulic support. Background Art

[0002] In underground coal mining, top caving is a coal mining process developed for the mining of thick and extra-thick coal seams. This coal mining process usually arranges a coal mining working face supported by hydraulic supports at the bottom of the thick coal seam, and mines coal horizontally along the coal seam. As the coal mining working face advances toward the front of the hydraulic support, the coal seam at the top of the goaf behind the hydraulic support is broken and scattered, and falls out at the "coal discharge window" at the tail of the hydraulic support. The remaining coal at the top of the goaf can be recovered. In this way, coal can be mined simultaneously in front and behind the hydraulic support, realizing the one-time mining of the full-thick coal seam and greatly improving the intensity of coal seam mining.

[0003] In related technologies, the coal seam at the top of the goaf is usually crushed by blasting and other methods. This method generates a relatively large impact force on the hydraulic support of the coal mining working face, which can easily cause damage and failure of the hydraulic cylinder of the hydraulic support, thereby causing the top plate of the hydraulic support to fall, posing a major safety hazard. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a hydraulic support equipped with a locking member. If the hydraulic cylinder of the hydraulic support fails due to blasting, the locking member can replace the hydraulic cylinder to support the hydraulic support roof, preventing it from falling and improving the safety of the top caving coal mining process.

[0005] The hydraulic support of an embodiment of the present invention includes: a base; a top plate and a first hydraulic cylinder, the first hydraulic cylinder is movably connected to the base and vertically arranged, the top plate is movably connected to the top end of the first hydraulic cylinder, the front end of the top plate is provided with a flap that can swing up and down and a first driving member that can drive the flap to rotate, and the top plate is also provided with an auxiliary arm connected to the base; a locking member, the locking member can lock the auxiliary arm and the base so that the auxiliary arm cannot move up and down relative to the base, or the locking member can release the auxiliary arm so that the auxiliary arm can move up and down relative to the base.

[0006] According to the hydraulic support of the embodiment of the present invention, the first hydraulic cylinder is movably connected to the base and is vertically arranged, the top plate is movably connected to the top end of the first hydraulic cylinder, the front end of the top plate is provided with a flap that can swing up and down and a first driving member that can drive the flap to rotate, and the top plate is also provided with an auxiliary arm connected to the base, the locking member can lock the auxiliary arm and the base so that the auxiliary arm cannot move up and down relative to the base, or the locking member can release the auxiliary arm so that the auxiliary arm can move up and down relative to the base. Therefore, the base of the hydraulic support of the present application is arranged at the bottom of the mined coal seam, the top plate is arranged at the top of the mined coal seam, the flap abuts against the mined coal wall, and the first hydraulic cylinder and the auxiliary arm are used for dual support between the base and the top plate, thereby forming a coal mining working face. When the coal mining working face is operating normally, the first hydraulic cylinder plays a major supporting role. When the first hydraulic cylinder is damaged and fails due to the blasting vibration of the goaf, the locking member can lock the auxiliary arm so that the auxiliary arm forms a support column instead of the first hydraulic cylinder for support, thereby preventing the top plate from falling and improving the safety of coal mining operations.

[0007] In some embodiments, the top plate includes a fixed plate and a movable plate, the fixed plate is connected to the first hydraulic cylinder, the movable plate is connected to the upper side of the fixed plate and is movable in the front and rear directions relative to the fixed plate, and the flap is connected to the first hydraulic cylinder.

[0008] The front end of the movable plate is rotatably connected, and the fixed plate is provided with a second driving member that can drive the movable plate to move forward and backward.

[0009] In some embodiments, the fixed plate has a sliding groove extending in the front-to-back direction, and the movable plate has a sliding column, which is slidably engaged in the sliding groove.

[0010] In some embodiments, the first driving member and / or the second driving member is a hydraulic cylinder.

[0011] In some embodiments, the auxiliary arm is vertically arranged, and the base has a vertical plate extending toward the top plate.

[0012] The auxiliary arm and the vertical plate have a first through hole and a second through hole opposite to each other, and the locking member is a threaded connector that can pass through the first through hole and the second through hole to connect the auxiliary arm to the vertical plate.

[0013] In some embodiments, the first through-hole is a waist-shaped hole extending in an up-down direction.

[0014] In some embodiments, a plurality of the first through holes may be spaced apart along the vertical direction.

[0015] In some embodiments, a shield plate is further included, the shield plate being located at the rear side of the top plate and the upper portion of the shield plate is

[0016] The end of the shield plate is movably connected to the rear end of the top plate, and the lower end of the shield plate is movably connected to the base.

[0017] In some embodiments, a first plug plate that can swing up and down is provided at the rear end of the top plate, a second hydraulic cylinder that can drive the first plug plate to rotate is provided on the top plate, and the shield plate has a coal leakage gap that penetrates the shield plate along its thickness direction.

[0018] In some embodiments, a second plug plate is provided at the coal leakage gap, and the second plug plate is connected to the shield plate and

[0019] The shield plate can swing up and down relative to the shield plate, and the shield plate is provided with a third hydraulic cylinder that can drive the second plugging plate to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a hydraulic support according to an embodiment of the present invention.

[0021] Figure 2 This is a side view of a hydraulic support according to an embodiment of the present invention.

[0022] Figure 3 This is a top view of a hydraulic support according to an embodiment of the present invention.

[0023] Figure 4 This is a cross-sectional view of a hydraulic support according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] Top plate 1, auxiliary arm 11, first through hole 111, fixed plate 12, movable plate 13, second driving member 14, slide groove 15,

[0026] Sliding column 16, base 2, vertical plate 21, second through hole 211, first hydraulic cylinder 3, locking member 4, flap 5, first driving member 051, shielding plate 6, coal leakage gap 61, first inserting plate 7, second hydraulic cylinder 71, second inserting plate 8, third hydraulic cylinder 81. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] like Figures 1-4 As shown, the hydraulic support according to the embodiment of the present invention includes a base 2 , a top plate 1 , a first hydraulic cylinder 3 and a locking member 4 .

[0029] Specifically, the first hydraulic cylinder 3 is movably connected to the base 2 and is vertically arranged, the top plate 1 is movably connected to the top end of the first hydraulic cylinder 3, the front end of the top plate 1 is provided with a flap 5 that can swing up and down and a first driving member 51 that can drive the flap 5 to rotate, and the top plate 1 is also provided with an auxiliary arm 11 connected to the base 2, the locking member 4 can lock the auxiliary arm 11 and the base 2 so that the auxiliary arm 11 cannot move up and down relative to the base 2, or, the locking member 4 can release the auxiliary arm 11 so that the auxiliary arm 11 can move up and down relative to the base 2.

[0030] In other words, the hydraulic support base 2 is arranged at the bottom of the mined coal seam, the roof 1 is arranged at the top of the mined coal seam, the flap 5 is in contact with the coal wall, and the base 2 and the roof 1 are doubly supported by the first hydraulic cylinder 3 and the auxiliary arm 11, thereby forming a coal mining working face. When the coal mining working face operates normally, the first hydraulic cylinder 3 plays a major supporting role. When the first hydraulic cylinder 3 is damaged and fails due to the vibration of blasting in the goaf, the locking part 4 can lock the auxiliary arm 11 so that the auxiliary arm 11 forms a support column instead of the first hydraulic cylinder 3 for support, preventing the roof 1 from falling and improving the safety of the top coal mining operation.

[0031] It should be noted that when the hydraulic support lifts the top plate 1 or lowers the top plate 1, the locking part 4 is in the released state, and the auxiliary arm 11 can move freely up and down relative to the base 2, thereby avoiding obstruction to the normal movement of the hydraulic support. When blasting operations are carried out on the top coal of the goaf, the locking part 4 can be set to the locked state in advance. At this time, the auxiliary arm 11 cannot move up and down relative to the base 2, so that the auxiliary arm 11 can form a support column and jointly support the first hydraulic cylinder 3 between the top plate 1 and the base 2, sharing the blasting impact force exerted on the first hydraulic cylinder 3, and also becoming a safety structure in case the first hydraulic cylinder 3 is damaged and fails. In addition, the auxiliary arm 11 can replace the first hydraulic cylinder 3 and be supported between the top plate 1 and the base 2, thereby facilitating timely maintenance of the first hydraulic cylinder 3 and quickly resuming coal mining operations.

[0032] It can be understood that the flap 5 can abut against the coal wall under the action of the first driving member 51, so that the flap 5 can produce a temporary support effect to prevent the coal wall from breaking off and injuring workers or damaging equipment. When the coal mining machine passes by, the first driving member 51 can be used to temporarily retract the flap 5 to ensure the smooth passage of the coal mining machine.

[0033] According to the hydraulic support of the embodiment of the present invention, the first hydraulic cylinder is movably connected to the base and is vertically arranged, the top plate is movably connected to the top end of the first hydraulic cylinder, the front end of the top plate is provided with a flap that can swing up and down and a first driving member that can drive the flap to rotate, and the top plate is also provided with an auxiliary arm connected to the base, the locking member can lock the auxiliary arm and the base so that the auxiliary arm cannot move up and down relative to the base, or the locking member can release the auxiliary arm so that the auxiliary arm can move up and down relative to the base. Therefore, the base of the hydraulic support of the present application is arranged at the bottom of the mined coal seam, the top plate is arranged at the top of the mined coal seam, the flap abuts against the mined coal wall, and the first hydraulic cylinder and the auxiliary arm are used for dual support between the base and the top plate, thereby forming a coal mining working face. When the coal mining working face is operating normally, the first hydraulic cylinder plays a major supporting role. When the first hydraulic cylinder is damaged and fails due to the blasting vibration of the goaf, the locking member can lock the auxiliary arm so that the auxiliary arm forms a support column instead of the first hydraulic cylinder for support, thereby preventing the top plate from falling and improving the safety of coal mining operations.

[0034] Further, if Figures 1-4 As shown, the top plate 1 includes a fixed plate 12 and a movable plate 13. The fixed plate 12 is connected to the first hydraulic cylinder 3. The movable plate 13 is connected to the upper side of the fixed plate 12 and is movable in the front and rear directions relative to the fixed plate 12. The flap 5 is rotatably connected to the front end of the movable plate 13. The fixed plate 12 is provided with a second driving member 14 that can drive the movable plate 13 to move forward and backward.

[0035] It can be understood that as the coal mining face advances forward, the second driving member 14 can continuously push the movable plate 13 forward relative to the fixed plate 12, thereby increasing the support area of the top plate 1, avoiding repeated movement of the hydraulic support, and improving coal mining efficiency.

[0036] Preferably, if Figure 4 As shown, the fixed plate 12 has a sliding groove 15 extending in the front-to-back direction, and the movable plate 13 has a sliding post 16 , which is slidably fitted in the sliding groove 15 .

[0037] In other words, the fixed plate 12 and the movable plate 13 are movably connected by the engagement of the sliding column 16 and the sliding groove 15 , thereby reducing friction loss when the fixed plate 12 and the movable plate 13 move relative to each other and improving the durability of the top plate 1 .

[0038] Further, if Figure 4 As shown, the first driving member 51 and / or the second driving member 14 are hydraulic cylinders.

[0039] It can be understood that the hydraulic drive has a smooth action and a large transmission power, which can reduce the disturbance to the supported coal seam while ensuring that the flap 5 or the movable plate 13 moves to the designated position to meet the coal roadway support requirements.

[0040] Further, if Figure 1-Figure 3As shown, the auxiliary arm 11 is vertically arranged, the base 2 has a vertical plate 21 extending toward the top plate 1, the auxiliary arm 11 and the vertical plate 21 have relative first through-holes 111 and second through-holes 211, and the locking member 4 is a threaded connector, which can pass through the first through-holes 111 and the second through-holes 211 to connect the auxiliary arm 11 to the vertical plate 21, that is, the clamping action of the threaded connector is used to lock the auxiliary arm 11 to the vertical plate 21, thereby fixing the height of the auxiliary arm 11.

[0041] Alternatively, as Figure 1 、 Figure 2 and Figure 4 As shown, the first through hole 111 is a waist-shaped hole extending in the up-down direction, that is, the first through hole 111 can be a long strip-shaped through hole, so that the auxiliary arm 11 can be adjusted to any height to match the length of the first hydraulic cylinder 3, avoiding the first through hole 111 from forming an obstruction when the first hydraulic cylinder 3 moves.

[0042] Optionally, a plurality of first through-holes 111 may be arranged in intervals along the up-down direction, that is, the first through-holes 111 may also be a plurality of circular holes consistent with the second through-holes 211. At this time, when the first hydraulic cylinder 3 is set at a specified height, the pin shaft can be passed through the first through-hole 111 and the second through-hole 211 to fix the height of the auxiliary arm 11. The number of the first through-holes 111 can be specifically set according to the commonly used coal seam height, thereby ensuring the flexibility and applicability of the hydraulic support.

[0043] Further, if Figures 1-4 As shown, the hydraulic support further includes a shielding plate 6 , which is located at the rear side of the top plate 1 , and the upper end of the shielding plate 6 is movably connected to the rear end of the top plate 1 , and the lower end of the shielding plate 6 is movably connected to the base 2 .

[0044] It can be understood that the top of the shield plate 6 can be hinged to the roof 1, and the bottom of the shield plate 6 can be connected to the base 2 through a hydraulic connecting rod, so that the shield plate 6 connects the roof 1 and the base 2 into an integral stable structure, thereby keeping the distance between the roof 1 and the base 2 stable. At the same time, the shield plate 6 can also withstand the lateral stress caused by coal mining in the goaf, thereby maintaining the coal mining working space.

[0045] Further, if Figures 1-4 As shown, the rear end of the roof 1 is provided with a first inserting plate 7 that can swing up and down, and the roof 1 is provided with a second hydraulic cylinder 71 that can drive the first inserting plate 7 to rotate. The shielding plate 6 has a coal leakage gap 61 that penetrates the shielding plate 6 along its thickness direction.

[0046] In other words, the second hydraulic cylinder 71 can drive the first insert plate 7 to swing in the up and down directions. Therefore, when top coal mining is carried out behind the hydraulic support, the first insert plate 7 can disturb and crush the falling coal blocks on the top of the hydraulic support, reduce the size of the coal blocks, and improve the flow dynamics of the top coal. Optionally, sharp teeth can be provided at the end of the first insert plate 7 to improve the crushing ability of the first insert plate 7.

[0047] It can be understood that the top coal can flow into the conveyor belt of the coal mining face through the coal leakage gap 61 of the shield plate 6, thereby realizing the collection and transportation of the top coal.

[0048] Further, if Figures 1-4 As shown, a second inserting plate 8 is provided at the coal leakage gap 61 , the second inserting plate 8 is connected to the shielding plate 6 and can swing up and down relative to the shielding plate 6 , and a third hydraulic cylinder 81 is provided on the shielding plate 6 to drive the second inserting plate 8 to rotate.

[0049] It is understandable that the swinging of the second inserting plate 8 at the coal leakage gap 61 can prevent the top coal from being blocked at the coal leakage gap 61, ensuring the smooth flow of the top coal. Optionally, the end of the second inserting plate 8 can be provided with sharp teeth to further reduce the size of the top coal blocks.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0054] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean 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 this specification, the schematic expressions of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydraulic support, characterized in that: include: base; A top plate and a first hydraulic cylinder, wherein the first hydraulic cylinder is movably connected to the base and is vertically arranged, the top plate is movably connected to the top end of the first hydraulic cylinder, the front end of the top plate is provided with a flap that can swing up and down and a first driving member that can drive the flap to rotate, and the top plate is also provided with an auxiliary arm connected to the base; a locking member, wherein the locking member can lock the auxiliary arm and the base so that the auxiliary arm cannot move up and down relative to the base, or the locking member can release the auxiliary arm so that the auxiliary arm can move up and down relative to the base; The top plate includes a fixed plate and a movable plate, the fixed plate is connected to the first hydraulic cylinder, the movable plate is connected to the upper side of the fixed plate and is movable in the front-to-back direction relative to the fixed plate, the flap is rotatably connected to the front end of the movable plate, and a second driving member is provided on the fixed plate to drive the movable plate to move forward and backward; The auxiliary arm is vertically arranged, the base has a vertical plate extending toward the top plate, the auxiliary arm and the vertical plate have a first through-hole and a second through-hole opposite to each other, and the locking member is a threaded connector that can pass through the first through-hole and the second through-hole to connect the auxiliary arm to the vertical plate; The first through-hole is a waist-shaped hole extending in the up-down direction; A plurality of first perforations are arranged at intervals in the vertical direction; It also includes a shield plate, the shield plate is located at the rear side of the top plate, the upper end of the shield plate is movably connected to the rear end of the top plate, and the lower end of the shield plate is movably connected to the base; A first inserting plate capable of swinging up and down is provided at the rear end of the top plate, a second hydraulic cylinder capable of driving the first inserting plate to rotate is provided on the top plate, and the shielding plate has a coal leakage notch penetrating the shielding plate along its thickness direction; A second plugboard is provided at the coal leakage gap. The second plugboard is connected to the shield plate and can swing up and down relative to the shield plate. A third hydraulic cylinder is provided on the shield plate to drive the second plugboard to rotate.

2. The hydraulic support according to claim 1, characterized in that: The fixed plate has a sliding groove extending in the front-rear direction, and the movable plate has a sliding column. The sliding column is slidably fitted in the sliding groove.

3. The hydraulic support according to claim 1, characterized in that: The first driving member and / or the second driving member is a hydraulic cylinder.

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