Discharging system of coal dressing bed

Abstract

The utility model relates to the field of coal dressing technology, in particular to a coal dressing bed discharging system which comprises a discharging mechanism arranged on a movable screening bed, the movable screening bed comprises a dressing bed, the discharging mechanism comprises a material blocking plate installed on the dressing bed, a discharging opening is formed in the position, corresponding to the front of the material blocking plate, of the dressing bed, a discharging pipe is installed below the discharging opening, and the discharging pipe is connected with the movable screening bed. A discharging wheel is installed in the discharging pipe, a bed layer thickness detector used for detecting the thickness of a material bed layer is arranged at the position, corresponding to the discharging opening, above the sorting bed, and the bed layer thickness detector is electrically connected with the discharging wheel. The bed layer thickness detector can automatically detect the thickness of the corresponding material bed layer and feed back the thickness to act on the discharging wheel, the rotating speed of the discharging wheel is controlled, the problem that the discharging purity of middling coal or clean coal is affected by material accumulation is effectively solved, and long-time monitoring operation of operators is not needed.

Description

Technical Field

[0001] The utility model relates to the field of coal preparation technology, in particular to a coal preparation bed discharging system. Background Art

[0002] The quality of coal separation results depends not only on factors such as the structure of the separator itself, the properties of raw coal, and the operation of personnel, but also to a large extent on the coal preparation process.

[0003] The prior art, such as the Chinese invention patent application with the publication number CN108273655A, discloses a jigging coal preparation system and method, which mainly uses a three-stage jigging machine and discharges the sorted materials through the cooperation of a discharge pipe and a discharge wheel. The advantage of this method is that the rotation speed of the discharge wheel can be set to control the discharge speed. However, this method cannot automatically adjust according to the thickness of the material layer, and it is easy to have problems such as material accumulation affecting the discharge purity, and it cannot effectively adapt to the dynamic separation process. Operators need to monitor the operation throughout the process, which is time-consuming and laborious. Summary of the Utility Model

[0004] In order to solve the problems existing in the above prior art, the utility model provides a coal preparation bed discharging system.

[0005] The coal preparation bed discharging system provided by the utility model adopts the following technical scheme:

[0006] A coal preparation bed discharging system includes a discharging mechanism arranged on a dynamic screening bed. The dynamic screening bed includes a screening bed. The discharging mechanism includes a baffle plate installed on the screening bed. A discharge port is arranged at a position corresponding to the front of the baffle plate on the screening bed. A discharge pipe is installed below the discharge port, and a discharge wheel is installed in the discharge pipe. A bed layer thickness detector for detecting the thickness of the material bed layer is arranged at a position corresponding to the discharge port above the screening bed. The bed layer thickness detector is electrically connected to the discharge wheel.

[0007] By adopting the above technical scheme, the bed layer thickness detector can automatically detect the thickness of the corresponding material bed layer, and feedback to act on the discharge wheel to control the rotation speed of the discharge wheel, avoiding the problem that material accumulation affects the discharge purity of medium coal or clean coal, and eliminating the need for operators to monitor the operation for a long time.

[0008] Optionally, a dust removal mechanism is arranged above the dynamic screening bed. The dust removal mechanism includes a dust suction hood located above the screening bed, and the bed layer thickness detector is installed on the dust suction hood.

[0009] By adopting the above technical scheme, the bed layer thickness detector is installed on the dust suction hood, avoiding collision damage to the bed layer thickness detector during the vibration and forward movement of the material. At the same time, the bed layer thickness detector is convenient for installation, disassembly and maintenance.

[0010] Optionally, an adjustment bolt is passed through the baffle plate, and the adjustment bolt is threadedly connected to the selected bed.

[0011] By adopting the above technical solution, the installation, disassembly and replacement of the baffle plate are facilitated.

[0012] Optionally, waist-shaped holes are vertically formed in the baffle plate, and the adjustment bolts are passed through the waist-shaped holes.

[0013] By adopting the above technical solution, it is convenient to adjust the height of the baffle plate adaptively according to the material conditions during production.

[0014] In summary, the utility model includes at least one of the following beneficial technical effects:

[0015] The bed layer thickness detector can automatically detect the thickness of the corresponding material bed layer, and feedback to act on the discharge wheel to control the rotation speed of the discharge wheel, avoiding the problem of material accumulation affecting the discharge purity of medium coal or clean coal, and eliminating the need for long-term monitoring and operation by operators;

[0016] The bed layer thickness detector is installed on the dust suction hood, avoiding collision damage to the bed layer thickness detector during the forward movement of the material vibration, and at the same time, the bed layer thickness detector is convenient for installation, disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a coal separation and bed discharging system according to an embodiment of the utility model.

[0018] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0019] Description of the reference numerals: 1, moving screening bed; 10, supporting beam; 11, selected bed; 2, air blowing mechanism; 20, air blowing hopper; 21, air blowing pipe; 3, discharging mechanism; 30, baffle plate; 31, adjustment bolt; 32, discharging pipe; 33, discharging wheel; 34, bed layer thickness detector; 4, dust removal mechanism; 40, dust suction hood; 41, air guide pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further describe the present utility model in detail with reference to the attached Figure 1 - attached Figure 2 drawings.

[0021] An embodiment of the present utility model discloses a coal separation and bed discharging system. Referring to Figure 1 , the coal separation and bed discharging system includes a discharging mechanism 3 arranged on a moving screening bed 1, an air blowing mechanism 2 arranged below the moving screening bed 1, and a dust removal mechanism 4 arranged above the moving screening bed 1.

[0022] Referring to Figure 1, the dynamic screening bed 1 includes a supporting beam 10 and a screening bed 11 installed on the supporting beam 10, and the material moves forward vibrantly on the screening bed 11. The air blowing mechanism 2 includes an air blowing hopper 20 installed at the bottom of the screening bed 11, and an air blowing pipe 21 for supplying air volume is connected to the air blowing hopper 20, and the air blowing pipe 21 is connected to a blower. The dust removal mechanism 4 includes a dust suction hood 40 and a duct 41. The dust suction hood 40 is located directly above the screening bed 11. One end of the duct 41 is connected to the dust suction hood 40, and the other end of the duct 41 is connected to a dust collector.

[0023] Referring to Figure 1 and Figure 2 , the discharging mechanism 3 includes a baffle 30. A waist-shaped hole is vertically formed in the baffle 30, and an adjusting bolt 31 for fixing the baffle 30 on the screening bed 11 is inserted through the waist-shaped hole. In other embodiments, other fixing methods can also be used to fix the baffle 30, such as welding or pin connection.

[0024] Referring to Figure 1 , there are two baffles 30. One is arranged in the middle of the screening bed 11, and the other is arranged at the tail of the screening bed 11. The baffle 30 located in the middle of the screening bed 11 is used to block gangue, and the baffle 30 located at the tail end of the screening bed 11 is used to block medium coal. On the screening bed 11, a discharging port for discharging gangue is arranged in front of the baffle 30 for blocking gangue, a discharging port for discharging medium coal is arranged in front of the baffle 30 for blocking medium coal, and a discharging port for discharging clean coal is arranged behind the baffle 30 for blocking medium coal.

[0025] Referring to Figure 1 , a discharge pipe 32 is installed below the discharge port. A discharge wheel 33 is installed in the discharge pipe 32. A bed thickness detector 34 is installed on the dust suction hood 40 at a position corresponding to the discharge port below. The bed thickness detector 34 is electrically connected to the discharge wheel 33. The bed thickness detector 34 is used to detect the thickness of the corresponding material bed. For example, if the material suddenly increases and the bed thickness increases, the bed thickness detector 34 can control the discharge wheel 33 to increase the rotation speed to accelerate the discharge of the material, so as to prevent the material in this bed from entering the next discharge port and affecting the discharge purity of medium coal or clean coal.

[0026] The implementation principle of the coal separation screening bed discharging system in the embodiment of the present utility model is as follows: The material is conveyed to the screening bed 11 by a belt conveyor. The material vibrates forward on the screening bed 11 and is stratified under the action of pulsed air and its own weight at the same time, and finally forms a gangue layer, a medium coal layer and a clean coal layer and is discharged in different areas.

[0027] During the entire production process, the rotational speed of the discharge wheel 33 is controlled by the bed thickness detector 34 to avoid the problem of material accumulation affecting the discharge purity of medium coal or clean coal. At the same time, before production, the operator can independently adjust the height of the baffle 30 to facilitate more precise sorting according to the material conditions.

[0028] The baffle 30, the discharge wheel 33, and the bed thickness detector 34 cooperate with each other to effectively solve the problem of inability to perform dynamic sorting in the prior art, improve the control accuracy of sorting and the discharge purity of medium coal and clean coal after sorting, and do not require long-term monitoring and operation by the operator, reducing labor costs.

[0029] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A coal preparation table discharge system, characterized in that: It includes a discharging mechanism (3) arranged on the movable screening bed (1). The movable screening bed (1) includes a screening bed (11). The discharging mechanism (3) includes a baffle plate (30) installed on the screening bed (11). A discharging port is arranged on the screening bed (11) at a position corresponding to the front of the baffle plate (30). A discharging pipe (32) is installed below the discharging port. A discharging wheel (33) is installed in the discharging pipe (32). A bed layer thickness detector (34) for detecting the thickness of the material bed layer is arranged on the screening bed (11) at a position corresponding to the discharging port. The bed layer thickness detector (34) is electrically connected to the discharging wheel (33).

2. The coal preparation and separation bed discharging system according to claim 1, wherein: A dust removal mechanism (4) is arranged above the movable screening bed (1). The dust removal mechanism (4) includes a dust suction hood (40) located above the screening bed (11). The bed layer thickness detector (34) is installed on the dust suction hood (40).

3. The coal preparation and sorting bed discharge system according to claim 1 or 2, characterized in that: An adjustment bolt (31) is penetrated through the baffle plate (30), and the adjustment bolt (31) is in threaded connection with the screening bed (11).

4. The coal preparation table discharge system according to claim 3, characterized in that: A waist-shaped hole is vertically formed in the baffle plate (30), and the adjustment bolt (31) is penetrated through the waist-shaped hole.

Images