Energy-absorbing and pressure-resisting top beam of top coal caving hydraulic support

Abstract

The utility model discloses an energy-absorbing pressure-resistant top beam of a top coal caving hydraulic support. The energy-absorbing pressure-resistant top beam comprises a top beam main body, a lifting plate and a pressure-resistant unloading assembly, the top beam main body has corresponding supporting force and is used for supporting a top plate; sinking grooves are formed in the supporting working face and used for containing corresponding parts; the lifting plate is erected above the sinking groove through the pressure-resistant unloading assembly, and an extrusion strip is arranged at the top end of the lifting plate to carry out corresponding support extrusion operation; the compression-resistant force unloading assembly comprises a deformation energy absorption part which is arranged in the sinking groove and located below the lifting plate, a supporting plate is assembled at the top end of the deformation energy absorption part and has corresponding supporting force, and the lifting plate is erected above the supporting plate through a lifting supporting column; the movable supporting blocks are fixedly connected and supported at the two ends of the bottom of the deformation energy-absorbing piece, balls are arranged at the bottom of the movable supporting blocks, and when the deformation energy-absorbing piece is stressed and deforms, the movable supporting blocks move in the frame moving direction in the sinking groove; the supporting springs are arranged between the movable supporting blocks and the corresponding inner walls of the sinking grooves in the frame moving direction, self-adaptive deformation is carried out when the movable supporting blocks move, a top coal seam top plate is stably supported, large and hard coal briquettes can be crushed through extrusion, and the situation that the large coal briquettes fall off to crush the top beam is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field related to a hydraulic support for top coal caving, and in particular relates to an energy-absorbing and pressure-resistant top beam of a hydraulic support for top coal caving. Background Art

[0002] During the coal caving process, the hydraulic support for top coal caving can break the balance of the base of the loose arch or crush the large coal pieces through the swing of the tail beam of the support to solve the problem of arch formation and large coal pieces blocking the coal caving process, so that the top coal caving can be more smoothly. The coal pieces in the top coal seam can be caved out from the coal caving port only when they are loose and broken.

[0003] However, during the support process of the hydraulic support, there will still be larger and harder top coal lumps in the local area above the top beam and top plate, which will exert greater pressure on the top beam. In addition, the larger and harder coal lumps in the top coal seam will easily fall and press the top beam, affecting the coal mining efficiency. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an energy-absorbing and pressure-resistant top beam of a hydraulic support for top coal caving, which can stably support the top plate of the top coal seam and can crush larger and harder coal blocks by squeezing to prevent larger coal blocks from falling and crushing the top beam.

[0005] The technical scheme adopted by the utility model is as follows: a top coal caving hydraulic support energy absorption and pressure resistant top beam, comprising a top beam body, a lifting plate and a pressure-resistant unloading assembly; the top beam body has a corresponding supporting force for supporting the top plate; a sinking groove is provided on the supporting working surface for accommodating corresponding components; the lifting plate is erected above the sinking groove through the pressure-resistant unloading assembly, and an extrusion strip is arranged at the top to perform corresponding support and extrusion operations; the pressure-resistant unloading assembly comprises a deformation energy absorbing part, which is arranged in the sinking groove and below the lifting plate, and a support plate is assembled at the top, the support plate has a corresponding supporting force, and the lifting plate is erected above the support plate through a lifting pillar; a moving support block is fixedly connected and supported at both ends of the bottom of the deformation energy absorbing part, and a ball bearing is arranged at the bottom. When the deformation energy absorbing part is deformed by force, it moves in the sinking groove along the direction of the moving frame; a support spring is arranged between the moving support block and the corresponding inner wall of the sinking groove along the direction of the moving frame, and adaptively deforms when the moving support block moves.

[0006] Furthermore, a slide rail matching the ball bearing is arranged on the inner bottom wall of the sinking groove, and the slide rail extends along the direction of the moving frame, the ball bearing is arranged in the slide rail, and the movable support block moves along the slide rail through the ball bearing.

[0007] Furthermore, a limiting long rod is provided between the two ends of the sinking groove in the direction of the frame shifting, the limiting long rod movably passes through the corresponding movable support block, and the supporting spring is wound around the limiting long rod.

[0008] Furthermore, steps are arranged on the inner walls of both ends of the sinking trough in the direction of the frame shifting, and rubber pads are arranged on the steps.

[0009] Furthermore, the deformation energy absorbing member is arranged as an arc-shaped plate, the outer layer is a wear-resistant rubber layer with a predetermined elastic deformation ability, the inner layer is an elastic alloy layer with a predetermined elastic deformation ability, and the inner layer and the outer layer can be formed by a multi-layer composite to enhance the deformation energy absorption effect of the deformation energy absorbing member.

[0010] After adopting the above structure, the utility model has the following beneficial effects:

[0011] (1) The lifting plate is supported by the anti-compression force-removing component, and during the support, the deformation energy-absorbing member plays the role of anti-compression force-removing, and limits the deformation energy-absorbing member from squeezing the support spring from the bottom to both sides, dispersing the pressure of the top plate and improving the support effect of the top beam;

[0012] (2) When the frame is moved, within the predetermined frame moving stroke, the lifting plate can provide support in the original position and squeeze and crush the coal blocks through the squeezing bars, and does not move significantly with the main body of the top beam, so as to prevent large and hard coal blocks from falling and protect the rear end of the main body of the top beam; after the frame is moved, the lifting plate descends and discharges the material to the rear end shield beam, and under the reset action of the support spring and the deformation energy absorbing part, it follows the limit long rod to the frame moving position, resets to the original position in the sinking trough, and then again provides stable support at the frame moving position and squeezes and crushes large pieces of coal in the top coal seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] Figure 1 This is a schematic diagram of the overall structure of an energy-absorbing and pressure-resistant top beam of a top coal caving hydraulic support proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a compression-resistant and force-unloading component of an energy-absorbing and compression-resistant top beam of a top coal caving hydraulic support proposed by the utility model;

[0016] Figure 3 The utility model is a schematic diagram of the internal structure of the energy-absorbing and pressure-resistant top beam sinking trough of the top coal caving hydraulic support.

[0017] In the attached drawings: 1. top beam body, 2. lifting plate, 3. sinking trough, 4. extrusion strip, 5. deformation energy absorption part, 6. support plate, 7. movable support block, 8. lifting pillar, 9. ball bearing, 10. support spring, 11. slide rail, 12. limit long rod, 13. rubber pad. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0020] like Figure 1-3 As shown, a top coal caving hydraulic support energy absorption and pressure resistance top beam comprises a top beam body 1, a lifting plate 2 and a pressure relief assembly; the top beam body 1 has a corresponding supporting force for supporting the top plate; a sinking groove 3 is provided on the support working surface for accommodating corresponding components, and steps are provided on the inner walls of both ends of the sinking groove 3 in the direction of frame movement, and rubber pads 13 are provided on the steps. When the lifting plate 2 is pressed down to the lowest point, the bottoms of both ends can rest on the rubber pads 13; the lifting plate 2 is erected above the sinking groove 3 through the pressure relief assembly, and an extrusion bar 4 is provided on the top to perform corresponding support and extrusion operations. Preferably, the extrusion bar 4 has a plurality of edges, and crushing teeth are formed on each edge. When the lifting plate 2 is supporting, the extrusion bar 4 at the top is lifted up by the lifting pillar 8 to extrude and crush the larger coal blocks on the top plate of the coal seam; the pressure relief assembly comprises a deformation energy absorption part 5, It is arranged in the sinking trough 3 and below the lifting plate 2, and a support plate 6 is installed on the top. The support plate 6 has a corresponding supporting force. The lifting plate 2 is erected above the support plate 6 through a lifting pillar 8, and the lifting pillar 8 is a hydraulic lifting column; the deformation energy absorbing member 5 is preferably arranged in an arc-shaped plate, the outer layer is a wear-resistant rubber layer with a predetermined elastic deformation ability, and the inner side is an elastic alloy layer with a predetermined elastic deformation ability. The inner layer and the outer side can be formed by a composite of multiple layers of corresponding materials to enhance the deformation energy absorption effect of the deformation energy absorbing member 5. When the lifting plate 2 is supporting, the top plate pressure is transferred to the downward square deformation energy absorbing member 5, and the deformation energy absorbing member 5 is deformed and absorbs energy, and the force is unloaded through deformation. When the deformation energy absorbing member 5 is deformed, it pushes the moving block to move along the limiting long rod 12, and squeezes the support spring 10 respectively, disperses a certain pressure of the top plate, and ensures the support effect of the top beam.

[0021] In some preferred embodiments, the anti-pressure unloading component also includes a movable support block 7, which is fixedly connected and supported at both ends of the bottom of the deformation energy absorbing member 5, and a ball 9 is arranged at the bottom. When the deformation energy absorbing member 5 is deformed by force, it moves in the sinking groove 3 along the direction of the frame shifting; a support spring 10 is arranged between the movable support block 7 and the corresponding inner wall of the sinking groove 3 along the direction of the frame shifting, and adaptively deforms when the movable support block 7 moves. Specifically, a slide rail 11 matching the ball 9 is arranged on the inner bottom wall of the sinking groove 3, and the slide rail 11 extends along the direction of the frame shifting, and the ball 9 is arranged in the slide rail 11. The movable support block 7 moves along the slide rail 11 through the ball 9. In addition, a limit rod 12 is arranged between the two ends of the sinking groove 3 in the direction of the frame shifting, and the limit rod 12 movably passes through the corresponding movable support block 7, and the support spring 10 is wound around the limit rod 12.

[0022] Working principle: the main body 1 of the top beam is matched with a suitable hydraulic support for top coal caving, and the lifting pillars 8 involved are connected to the hydraulic working system of the hydraulic support; when supporting, the lifting pillars 8 lift the lifting plate 2, and the extrusion bars 4 at the top of the lifting plate 2 crush the large pieces of coal in the top coal seam to prevent the large pieces of coal from falling and crushing the top beam; during the support operation, the lifting plate 2 transmits the top plate pressure downward, and the deformation energy absorbing member 5 plays the role of resisting pressure and unloading, and limits the deformation energy absorbing member 5 from squeezing the support spring 10 from the bottom to both sides, dispersing the pressure of the top plate and improving the support effect of the top beam;

[0023] When the frame is moved, within the predetermined frame moving stroke, the lifting plate 2 can provide support in the original position and extrude and crush the coal blocks through the extrusion bars 4, and will not move significantly with the top beam body 1 (the lifting plate 2 is against the top plate, and the ball 9 is in the slide rail 11, so that the moving block and the top beam body 1 slide relative to each other), to prevent larger and harder coal blocks from falling and to protect the rear end of the top beam body 1; after the frame is moved, the lifting plate 2 descends and discharges material to the rear end shielding beam, and under the resetting action of the support spring 10 and the deformation energy absorbing member 5, it follows the limit long rod 12 to the frame moving position, resets to the original position in the sinking trough 3, and then again provides stable support and extrude and crushes large pieces of coal in the top coal seam at the frame moving position.

[0024] Although the embodiments of the utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the scope of protection of the utility model.

Claims

1. An energy-absorbing and pressure-resistant top beam of a top coal caving hydraulic support, characterized in that: include: The main body of the top beam has corresponding supporting force and is used to support the top plate; a sinking trough is set on the supporting working surface to accommodate corresponding components; The lifting plate is erected above the sinking trough through the pressure-resistant and force-relieving components, and an extrusion strip is set on the top to carry out corresponding support and extrusion operations; The pressure-resistant and force-releasing component includes a deformation energy-absorbing part, which is arranged in the sinking groove and located below the lifting plate. A support plate is installed on the top. The support plate has a corresponding supporting force. The lifting plate is erected above the support plate through a lifting pillar; a movable support block is fixedly connected and supported at both ends of the bottom of the deformation energy-absorbing part. Ball bearings are arranged at the bottom. When the deformation energy-absorbing part is deformed by force, it moves in the sinking groove along the direction of the moving frame; a support spring is arranged between the movable support block and the corresponding inner wall of the sinking groove along the direction of the moving frame, and adaptively deforms when the movable support block moves.

2. The energy-absorbing and pressure-resistant top beam of the top coal caving hydraulic support according to claim 1 is characterized in that: A slide rail matching the ball bearing is arranged on the inner bottom wall of the sinking groove, and the slide rail extends along the direction of the moving frame. The ball bearing is arranged in the slide rail, and the movable support block moves along the slide rail through the ball bearing.

3. The energy-absorbing and pressure-resistant top beam of the top coal caving hydraulic support according to claim 1 is characterized in that: A limiting long rod is arranged between the two ends of the sinking groove in the direction of the frame shifting, the limiting long rod movably passes through the corresponding movable support block, and the support spring is wound around the limiting long rod.

4. The energy-absorbing and pressure-resistant top beam of the top coal caving hydraulic support according to claim 1 is characterized in that: The inner walls of the sinking trough at both ends in the frame moving direction are provided with steps, and rubber pads are provided on the steps.

5. The energy-absorbing and pressure-resistant top beam of the top coal caving hydraulic support according to claim 1 is characterized in that: The deformation energy absorbing member is an arc-shaped plate, the outer layer of which is a wear-resistant rubber layer with a predetermined elastic deformation capacity, and the inner layer of which is an elastic alloy layer with a predetermined elastic deformation capacity.

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