Goaf float coal low-position recovery device

Abstract

The utility model provides a goaf float coal low-position recovery device which is installed on a chute at the rear portion of a scraper and comprises a connecting assembly and a recovery assembly, the connecting assembly comprises a fixing lug, a U-shaped connecting lug and an adjusting nut, the fixing lug is arranged on the rear side face of the chute at the rear portion, two arms of the U-shaped connecting lug are provided with external threads, and the U-shaped connecting lug is connected with the recovery assembly through the adjusting nut. The recovery assembly comprises a coal collecting belt and a metal carriage arranged below the coal collecting belt, the coal collecting belt and the metal carriage are fixed through an upper clamping plate and a lower clamping plate, an L-shaped connecting base is arranged at the upper end of the upper clamping plate, a transverse plate of the connecting base is connected with the upper clamping plate, and the transverse plate of the connecting base is connected with the lower clamping plate. A fixing hole is formed in a vertical plate of the connecting base, and the U-shaped connecting lug is used for penetrating through the fixing lug and the fixing hole of the connecting base to connect the recycling mechanism to the rear chute in a distance-adjustable mode. The goaf float coal low-position recovery device is reasonable in structure, the strength is improved, the friction resistance is reduced, and the recovery rate and the reuse rate reach 97.2%.

Description

Technical Field

[0001] This utility model belongs to the field of underground equipment technology, and in particular relates to a low-level recovery device for floating coal in goaf areas. Background Technology

[0002] Currently, most thick coal seam mining adopts the low-level top coal caving process. Coal on the working face is transported out by a scraper conveyor. Due to the constraints of the mining process, some coal is left in the goaf. To avoid resource waste, a floating coal recovery device is usually connected after the scraper conveyor. Chinese utility model CN201193527Y discloses a low-level coal recovery device for the goaf of a low-level fully mechanized longwall mining face, which consists of a connecting plate, connecting ears, upper and lower pressure plates, and a support plate. The connecting plate is connected to the connecting ears by connecting pins, and the support plate is close to the working face panel. The above-mentioned floating coal recovery device cannot adjust the distance between the recovery mechanism and the scraper conveyor, often resulting in a large gap between the leading edge of the recovery mechanism and the rear vertical surface of the scraper conveyor, causing some coal to leak out through the gap, resulting in energy waste. At the same time, the support plate is in direct contact with the ground, resulting in greater resistance. The old pond floating coal recovery device has a self-weight and load of 800 kg. Although the forward movement force of the recovery device accounts for a small proportion, it may cause the rear slide to be unable to move or damage the rear slide jack. Summary of the Invention

[0003] The technical problem solved by this utility model is that the underground floating coal recovery device cannot adjust the distance between the recovery mechanism and the scraper conveyor and has excessive moving resistance.

[0004] This utility model provides a low-level recovery device for floating coal in a goaf, installed in the rear chute of a scraper conveyor. It includes a connecting assembly and a recovery assembly. The connecting assembly includes a fixing lug, a U-shaped connecting lug, and an adjusting nut. The fixing lug is located on the rear side of the rear chute. The two arms of the U-shaped connecting lug have external threads, and the adjusting nut has an internal thread matching the external threads of the U-shaped connecting lug. The recovery assembly includes a coal receiving belt and a metal drag plate located below the coal receiving belt. The coal receiving belt and the metal drag plate are fixed by upper and lower clamping plates. The upper end of the upper clamping plate has an L-shaped connecting seat. The horizontal plate of the connecting seat is connected to the upper clamping plate, and the vertical plate of the connecting seat has a fixing hole. The U-shaped connecting lug is used to pass through the fixing lug and the fixing hole of the connecting seat to adjustably connect the recovery mechanism to the rear chute.

[0005] Furthermore, the coal receiving belt and the metal tray are provided with several through holes at the front, and the upper and lower clamping plates are provided with several connecting holes for bolts to pass through and fix the coal receiving belt to the metal tray.

[0006] Furthermore, the lengths of the two arms of the U-shaped connecting ear are adapted to the lengths of the upper and lower clamps extending forward from the coal receiving belt.

[0007] Furthermore, the metal sliding plate is a stainless steel sliding plate to reduce frictional resistance with the ground.

[0008] Furthermore, each section of the scraper conveyor is connected to a recycling assembly at the rear chute.

[0009] Furthermore, the recycling assembly can rotate up and down around the fixed ear to reduce the impact of ground protrusions on the recycling assembly.

[0010] This utility model has the following beneficial effects: The floating coal recovery device of this utility model reduces the pulling resistance and strength of the recovery device by adding a stainless steel drag plate below the coal receiving belt. This reduces the original friction coefficient between the coal receiving belt and the working face floor plate from 0.5-0.6 to approximately 0.3, a reduction of 40%-50% in friction. Furthermore, the recovery component can rotate up and down around the fixed lug, allowing for vertical swinging freedom to adapt to uneven and sloped geological conditions at the coal mining face, thus reducing the impact of ground protrusions on the recovery component. Simultaneously, by setting a U-shaped connecting lug, the recovery mechanism is adjustablely connected to the rear chute. The length of the two arms of the U-shaped connecting lug is adapted to the length of the upper and lower clamping plates extending forward from the coal receiving belt. The distance between the coal receiving belt and the rear chute of the scraper conveyor can be adjusted by adjusting the adjusting nut, achieving a seamless connection and reducing resource waste. Attached Figure Description

[0011] Figure 1 Schematic diagram of the low-level recovery device for floating coal in the goaf area of ​​this utility model. Detailed Implementation

[0012] To clearly illustrate the technical features of this solution, specific embodiments are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model.

[0013] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] like Figure 1 As shown, a low-level recovery device for floating coal in a goaf is installed in the rear chute of a scraper conveyor, including a connecting component and a recovery component. Each section of the rear chute of the scraper conveyor is connected to a recovery component.

[0015] The recycling assembly includes a coal receiving belt 1 and a metal slide plate 2 positioned below the coal receiving belt. The coal receiving belt 1 and the metal slide plate 2 are fixed together by upper and lower clamping plates. Several through holes are provided at the front of both the coal receiving belt 1 and the metal slide plate 2. The upper clamping plate 3 and the lower clamping plate are respectively provided with several connecting holes for bolts to pass through and fix the coal receiving belt 1 to the metal slide plate 2. In this embodiment, the metal slide plate 2 is made of stainless steel to reduce the pulling resistance and strength of the recycling device, reducing the original coefficient of friction between the coal receiving belt and the working face bottom plate from 0.5-0.6 to approximately 0.3, thus reducing friction by 40%-50%.

[0016] The connecting assembly includes a fixed ear 4, a U-shaped connecting ear 5, and an adjusting nut 6. The fixed ear 4 is located on the rear side of the rear chute. The two arms of the U-shaped connecting ear 5 have external threads. The adjusting nut 6 has internal threads that match the external threads of the U-shaped connecting ear 5. The upper end of the upper clamping plate 3 has an L-shaped connecting seat. The horizontal plate of the connecting seat is connected to the upper clamping plate 3, and the vertical plate of the connecting seat has a fixing hole. The U-shaped connecting ear 5 is used to pass through the fixing holes of the fixed ear 4 and the connecting seat to connect the recovery mechanism to the rear chute with adjustable distance. The recovery assembly can rotate up and down around the fixed ear 4, and has the freedom to swing up and down to adapt to the uneven and sloped geological conditions of the coal mining face, so as to reduce the impact of ground protrusions on the recovery assembly. The length of the two arms of the U-shaped connecting ear 5 is adapted to the length of the coal receiving belt 1 extending forward from the upper and lower clamping plates. The distance between the coal receiving belt 1 and the rear chute of the scraper conveyor is adjusted by adjusting the position of the adjusting nut 6 to achieve a seamless connection.

[0017] This utility model has a reasonable structure, improved strength, and reduced frictional resistance for low-level recovery of floating coal in goaf areas. After trial use in underground working areas, the recovery rate and reuse rate of the recovery device reached 97.2%.

[0018] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0019] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A low position recovery device for goaf floating coal, which is installed at a rear chute of a scraper, characterized in that, The connecting assembly comprises a fixing lug, a U-shaped connecting lug and an adjusting nut, the fixing lug is arranged on the rear side of the rear chute, the two arms of the U-shaped connecting lug are provided with external threads, and the adjusting nut is provided with internal threads matched with the external threads of the U-shaped connecting lug, The recycling assembly comprises a coal collecting belt and a metal drag plate arranged below the coal collecting belt, the coal collecting belt and the metal drag plate are fixed by upper and lower clamps, the upper end of the upper clamp is provided with an L-shaped connecting seat, the horizontal plate of the connecting seat is connected with the upper clamp, the vertical plate of the connecting seat is provided with a fixing hole, and the U-shaped connecting lug is used to pass through the fixing lug and the fixing hole of the connecting seat to adjustably connect the recycling mechanism with the rear chute. The front part of the coal collecting belt and the metal drag plate is provided with a plurality of through holes, and the upper clamp and the lower clamp are correspondingly provided with a plurality of connecting holes for the bolts to pass through to fix the coal collecting belt on the metal drag plate.

2. The goaf floating coal low-position recovery device according to claim 1, characterized in that, The length of the two arms of the U-shaped connecting lug is matched with the length of the coal collecting belt protruding out of the upper and lower clamps.

3. The goaf floating coal low-position recovery device according to claim 1, characterized in that, The metal drag plate is a stainless steel drag plate to reduce the frictional resistance with the ground.

4. The goaf floating coal low-position recovery device according to claim 1, characterized in that, The scraper machine is connected with a set of recycling assemblies for each rear chute.

5. The goaf floating coal low-position recovery device according to claim 1, characterized in that, The recycling assembly can rotate up and down around the fixing lug to reduce the impact of the ground protrusions on the recycling assembly.

6. The goaf floating coal low-position recovery device according to claim 1, characterized in that, ​

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