Flying waste rock upper protection structure and end hydraulic support

Abstract

The utility model discloses a flying waste rock upper protection structure and an end hydraulic support, and belongs to the related technical field of hydraulic supports, and the flying waste rock upper protection structure comprises a double protection unit and a driving unit; the dual-protection unit is rotationally mounted at a preset position at the front end of the bottom of the top beam and performs blocking operation within a preset range below the top beam; the driving unit can enable the dual-protection unit to rotate to different operation angles during operation; an end hydraulic support comprises a flying waste rock upper protection structure provided in the first aspect, a fixed baffle is assembled on the front portion of a base of the end hydraulic support, the top end of the fixed baffle extends upwards in the direction perpendicular to a bottom plate, the fixed baffle can abut against the rear side of a double-protection unit, and through the split protection structures which are in up-down lap joint, the end hydraulic support is fixed to the bottom plate. Flying waste rocks are blocked to protect the interior of the hydraulic support, the protection blocking angle on the upper portion of the hydraulic support can be adjusted, and the upper protection structure is in linkage double protection and has the energy absorption and force unloading effects on the flying waste rocks.

Description

Technical Field

[0001] The utility model belongs to the technical field related to hydraulic supports, and particularly relates to an upper protection structure for flying gangue and an end hydraulic support. Background Art

[0002] For coal seams with a certain inclination angle, hydraulic supports are installed at the coal mining face to support the coal mining face, and end hydraulic supports are used for gateway support and support of the hydraulic supports at the mining face at the inclined bottom end. As Figure 1 shown, during the mining process of the inclined coal seam by the end hydraulic support, the support height can be adjusted adaptively. Generally, the gangue retaining plate of the hydraulic support is telescopic and heightened to adapt to the support height of the hydraulic support. However, the telescopic and heightened part of the gangue retaining plate has potential instability hazards when subjected to large impacts. In coal seams with complex conditions, there are multiple layers of intercalated gangue. During the coal mining face retreating, the amount of coal and gangue is large, and the flying gangue hits the upper part of the telescopic and heightened gangue retaining plate, with a large impact force that easily causes damage to the gangue retaining plate, and the gangue hits the inside of the end hydraulic support, causing damage to the internal pipelines, valve groups, and pipelines of the hydraulic support. Summary of the Utility Model

[0003] In view of the above situation, to overcome the defects of the prior art, the utility model provides an upper protection structure for flying gangue and an end hydraulic support. Through an upper and lower overlapping and split protection structure, the flying gangue is blocked to protect the inside of the hydraulic support. The protection and blocking angle above the hydraulic support can be adjusted, and the upper protection structure is a linkage double protection, which has the effect of absorbing energy and unloading force on the flying gangue.

[0004] The technical solution adopted by the utility model is as follows:

[0005] In a first aspect, the utility model provides an upper protection structure for flying gangue, which includes a double protection unit and a driving unit; the double protection unit is rotatably installed at a predetermined position at the front end of the bottom of the top beam and performs blocking operations within a predetermined range below the top beam; the driving unit is installed at the bottom of the top beam and is located behind the double protection unit, and can rotate the double protection unit to different operating angles during operation.

[0006] Further, the double protection unit includes a protection plate and a support plate fixedly connected at the top. The connection between the top of the protection plate and the support plate is rotatably installed at the bottom of the top beam through a connection component. The protection plate is located in front of the support plate. A predetermined gap is provided between the protection plate and the support plate. The protection plate and the support plate are connected by rubber columns. At least two extrusion air bags are arranged on the support plate, and a one-way air inlet pipe and an exhaust pipe are connected between the two extrusion air bags.

[0007] Further, lap blocks are arranged at the lower part of the rear side of the support plate, and the lap blocks are arranged at intervals along the width direction of the support plate.

[0008] Further, strip-shaped grooves are provided in front of the protective plate, and the strip-shaped grooves are arranged at intervals up and down.

[0009] Further, the driving unit includes a telescopic push rod, the telescopic push rod is installed at the bottom of the top beam through a fixed vertical plate, the telescopic end of the telescopic push rod is assembled with a resisting plate, and the resisting plate abuts against the rear side of the double protection unit.

[0010] In a second aspect, the present invention provides a head hydraulic support, which includes the flying gangue upper protection structure proposed in the first aspect. A fixed baffle is assembled and fixed at the front of the base of the head hydraulic support. The top end of the fixed baffle extends upward in a direction perpendicular to the bottom plate, and the fixed baffle can be in contact with the rear side of the double protection unit.

[0011] After adopting the above structure, the beneficial effects of the present invention are as follows: A flying gangue upper protection structure and a head hydraulic support proposed by the present invention. The upper protection structure is installed at the bottom of the top beam of the head hydraulic support, and the barrier protection angle can be adjusted. It cooperates with the fixed baffle at the base of the head hydraulic support to protect the inside of the head hydraulic support. In addition, the upper protection structure is a double protection structure. When hit by flying gangue, the front protective plate moves closer to the support plate (there is a predetermined gap between the protective plate and the support plate). The rubber column between the protective plate and the support plate and the linked extrusion airbag can absorb and relieve the impact force, ensuring the barrier protection effect on the upper part inside the hydraulic support. At the same time, effective barrier protection can be achieved at the lap joint with the fixed baffle, avoiding direct force on the upper part of the fixed baffle. Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0013] Figure 1 It is a use state diagram of a head hydraulic support and a flying gangue upper protection structure proposed by the present invention;

[0014] Figure 2 It is an overall structure schematic diagram of a flying gangue upper protection structure proposed by the present invention;

[0015] Figure 3 It is a half-sectional view of a flying gangue upper protection structure proposed by the present invention;

[0016] Figure 4 It is another angle overall structure schematic diagram of a flying gangue upper protection structure proposed by the present invention.

[0017] In the attached drawings: 1. top beam, 2. protective plate, 3. support plate, 4. rubber column, 5. extrusion airbag, 6. overlap block, 7. telescopic push rod, 8. fixed vertical plate, 9. support plate, 10. limiting vertical plate, 11. fixed baffle, 12. base. 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] Example 1

[0021] like Figures 1-4 As shown, a flying gangue protection structure comprises a double protection unit and a driving unit for driving the double protection unit to rotate and change the blocking protection angle; the double protection unit is rotatably installed at a predetermined position at the front end of the bottom of the top beam 1, and performs blocking operations within a predetermined range below the top beam 1; the driving unit is installed at the bottom of the top beam 1 and is located at the rear side of the double protection unit, so that the double protection unit can be rotated to different operating angles during operation. In this embodiment, preferably, the driving unit comprises a telescopic push rod 7, which is installed at the bottom of the top beam 1 through a fixed vertical plate 8, and the telescopic end of the telescopic push rod 7 is assembled with abutting plate 9, which abuts on the rear side of the double protection unit, and the assembly plate is connected to the telescopic end of the telescopic push rod 7 through a universal ball, so that the abutting direction of the abutting plate 9 can be adjusted. Furthermore, a limiting vertical plate 10 is arranged on the front side of the fixed vertical plate 8, and the limiting vertical plate 10 is fixed under the top beam 1. The telescopic end of the telescopic push rod 7 movably passes through the limiting vertical plate 10. The limiting vertical plate 10 supports and limits the telescopic end of the telescopic push rod 7, thereby improving stability and reducing shaking when impacted.

[0022] In this embodiment, further, the double protection unit includes a protection plate 2 and a support plate 3 fixedly connected at the top. The connection between the top ends of the protection plate 2 and the support plate 3 is rotatably installed at the bottom of the top beam 1 through a connection component. The protection plate 2 is located in front of the support plate 3. Here, preferably, strip-shaped grooves are provided in front of the protection plate, and the strip-shaped grooves are arranged at intervals up and down; a predetermined gap is provided between the protection plate 2 and the support plate 3, and the protection plate 2 and the support plate 3 are connected by rubber columns 4. At least two extrusion air bags 5 are provided on the support plate 3, and a one-way intake pipe and an exhaust pipe are connected between the two extrusion air bags 5. When the protection plate 2 is impacted by flying gangue, the rubber columns 4 and the linked extrusion air bags 5 absorb and relieve the impact force, blocking the flying gangue from entering the inside of the hydraulic support from above.

[0023] Embodiment 2

[0024] On the basis of Embodiment 1, a face-end hydraulic support includes a flying gangue upper protection structure. A fixed baffle 11 is assembled and fixed at the front of the base 12 of the face-end hydraulic support. The top end of the fixed baffle 11 extends upward in a direction perpendicular to the bottom plate (the fixed baffle 11 can be a telescopic fixed baffle 11, and it can be telescoped upward to overlap with the upper protection structure), and the fixed baffle 11 can be in contact with the rear side of the double protection unit. In addition, lap blocks 6 can be provided at the lower part of the rear side of the support plate 3. The lap blocks 6 are arranged at intervals along the width direction of the support plate 3. The lap blocks 6 can increase the thickness of the rear side of the support plate 3, and the lap blocks 6 can be set as elastic bodies with a certain elasticity. When the upper protection structure rotates to overlap with the fixed baffle 11, the lap blocks 6 abut against the front side of the fixed baffle 11, relieve the force and buffer when stressed, improve the protection effect of the upper part of the fixed baffle 11, prevent the flying gangue from directly hitting the upper part of the fixed baffle 11, extend the service life of the fixed baffle 11, and reduce the frequency of replacement and maintenance.

[0025] Based on the above embodiments, the working principle of the utility model of the present application is as follows: The end hydraulic support involved in the utility model is used to resist and support the crossheading (coal haulage roadway) below the coal mining face with an inclination angle, and laterally support the hydraulic support for support installed in the inclined roadway. During coal mining, flying gangue will be generated in the parting layer, which is likely to hit the end hydraulic support located below the inclined roadway. Therefore, a cooperating upper protection structure and a fixed baffle 11 are installed on the front side of the end hydraulic support. The top fixed connection of the protection plate 2 and the support plate 3 is rotatably installed at the bottom of the top beam 1. The telescopic push rod 7 performs telescopic operation and abuts against the rear side of the fixed support plate 3 to adjust and position the blocking angle of the protection plate 2 and the support plate 3. When the top beam 1 of the end hydraulic support is at different angles, it can cooperate with the fixed baffle 11 to close the front side of the hydraulic support, preventing the inside of the hydraulic support from being hit by flying gangue. Moreover, the upper part of the fixed baffle 11 is located at the rear side of the protection plate 2 and the support plate 3 and will not be directly hit by flying gangue, reducing the probability of damage to the fixed baffle 11. In addition, when the flying gangue hits the protection plate 2, rubber columns 4 and linked extrusion air bags 5 are arranged between some separated protection plates 2 and support plates 3 to unload the impact force. The fixed baffle 11 cooperates with the upper protection structure at the rear side to improve the stability of the blocking protection.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. In short, if those of ordinary skill in the art are inspired by it and design similar structural methods and embodiments without creative efforts without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A flying gangue protection structure installed at the bottom of the top beam of the end hydraulic support, characterized in that: include: The double protection unit is rotatably installed at a predetermined position at the front end of the bottom of the top beam and performs a blocking operation within a predetermined range below the top beam; The driving unit is installed at the bottom of the top beam and located at the rear side of the double protection unit. During operation, the double protection unit can be rotated to different operating angles.

2. The flying debris protection structure according to claim 1 is characterized in that: The double protection unit includes a protection plate and a support plate fixedly connected at the top, the connection between the protection plate and the top of the support plate is rotatably installed on the bottom of the top beam through a connecting assembly, the protection plate is located on the front side of the support plate, a predetermined gap is set between the protection plate and the support plate, the protection plate and the support plate are connected by a rubber column, at least two extrusion airbags are set on the support plate, and a one-way intake pipe and exhaust pipe are connected between the two extrusion airbags.

3. The flying debris protection structure according to claim 2 is characterized in that: A lap block is arranged at the lower rear portion of the support plate, and the lap blocks are arranged at intervals along the width direction of the support plate.

4. The flying debris protection structure according to claim 1 is characterized in that: The driving unit comprises a telescopic push rod, which is mounted on the bottom of the top beam through a fixed vertical plate. The telescopic end of the telescopic push rod is equipped with a support plate, and the support plate is supported on the rear side of the double protection unit.

5. The flying debris protection structure according to claim 4 is characterized in that: A limiting vertical plate is arranged at the front side of the fixed vertical plate, the top end of the limiting vertical plate is fixed to the bottom of the top beam, and the telescopic end of the telescopic push rod movably passes through the limiting vertical plate.

6. The flying debris protection structure according to claim 2 is characterized in that: Strip grooves are arranged in front of the protective plate, and the strip grooves are arranged at intervals up and down.

7. A hydraulic support for an end, characterized in that: It comprises the flying gangue protection structure as described in any one of claims 1 to 5, wherein a fixed baffle is mounted on the front of the end hydraulic support base, the top end of the fixed baffle extends upward in a direction perpendicular to the bottom plate, and the fixed baffle can abut against the rear side of the double protection unit.

Images