A vibrating screening equipment for coal preparation

Abstract

The present invention discloses a vibrating screening device for coal preparation, which belongs to the field of screening equipment and comprises a vibrating frame and a screening part arranged on the vibrating frame. A screening unit is arranged in the screening part, and the screening unit comprises a screening drum, a driving mechanism and a cleaning assembly. The screening drum is rotatably arranged in the screening part, and comprises a frame assembly and a plurality of screening rod members distributed along the periphery of the frame assembly. The cleaning assembly can allow the screening rod members located in its working area to rotate during the rotation of the screening drum to increase the screening gap. The present invention is provided with a cleaning assembly, which can increase the screening gap one by one to achieve the purpose of cleaning the coal particles blocked in the screening gap, thereby effectively improving the screening efficiency.

Description

Technical Field

[0001] The invention relates to the field of screening equipment, and in particular to a vibrating screening equipment for coal preparation. Background Art

[0002] Vibrating screens are often used for grading and screening coal particles. However, during the vibration screening process, some coal particles are easily stuck in the screening gaps, causing blockage and affecting the screening efficiency. Since the screening structure is mostly located inside the shell structure (such as the vibrating screen for the cylindrical screen with publication number CN108014993A), it is not convenient to disassemble and clean. Therefore, it is necessary to design a vibrating screening equipment for coal preparation that can be easily cleaned. Summary of the invention

[0003] The invention provides a vibrating screening device for coal preparation, which is used to solve the problem of inconvenience in cleaning the blocking objects in the screening seams of the vibrating screening device in the prior art.

[0004] A vibrating screening device for coal preparation comprises a vibrating frame and a screening part arranged on the vibrating frame, wherein a screening unit is arranged in the screening part, and the screening unit comprises:

[0005] The screening cylinder is rotatably arranged in the screening part, and comprises a frame assembly and a plurality of screening rods distributed along the periphery of the frame assembly, and a screening gap is provided between two adjacent screening rods.

[0006] A driving mechanism 1, used for driving the screening drum to rotate; and

[0007] The cleaning assembly can allow the screen bar members located in the working area of ​​the screen drum to rotate during the rotation of the screen drum to increase the screening gap.

[0008] The frame assembly is provided with a plurality of mounting grooves corresponding to the plurality of screen rods. The screen rods are hinged in the mounting grooves. Elastic parts are also arranged in the mounting grooves. Under the action of the elastic parts, the screen rods abut against the groove walls of the mounting grooves.

[0009] The screening cylinder is cylindrical or square.

[0010] The frame assembly is also plugged with a plurality of plug-in rod pieces corresponding to the plurality of screen rod pieces one by one, one end of the plug-in rod piece contacts the screen rod piece, and the other end extends out of the frame assembly.

[0011] The cleaning assembly is arranged on the moving path of the plug rod member. During the rotation of the screening drum, the cleaning assembly will abut against the end of the plug rod member extending out of the frame assembly, so that the plug rod member abuts against the screen rod member, allowing the screen rod member to rotate around the hinge point, thereby increasing the gap between at least one screen rod member adjacent to it.

[0012] There are two cleaning components, which are respectively arranged above and below the screening cylinder.

[0013] The cleaning component is a wheel-shaped structure.

[0014] Also included is a regulating component, the regulating component comprising:

[0015] A plurality of adjusting blocks are respectively arranged on a plurality of inserting rods, and one side of the adjusting blocks has an inclined surface.

[0016] The adjusting frame is plugged into the frame assembly.

[0017] The second driving mechanism is used to drive the adjustment frame to contact the inclined surfaces of several insertion rods, so that the insertion rods move in the length direction thereof, and the several screen rods rotate synchronously at the same angle, thereby adjusting the gap between adjacent screen rods.

[0018] Preferably, the cross section of the screen bar member is trapezoidal.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a cleaning component, which can enlarge the screening gaps one by one to achieve the purpose of cleaning up the coal particles blocked in the screening gaps, effectively improving the screening efficiency; in addition, an adjusting component is provided, which can adjust the size of the screening gaps according to demand, and is suitable for graded screening, thereby screening out high-quality coal of different grades. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the screening part of the first embodiment of the present invention.

[0022] Figure 3 It is a partial cross-sectional view of the screening part of the first embodiment of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the screen rod member of the first embodiment of the present invention under the action of the cleaning assembly.

[0024] Figure 5 It is a schematic structural diagram of the screen rod member of the second embodiment of the present invention under the action of the adjustment mechanism.

[0025] Figure 6 It is a partial cross-sectional view of a frame assembly according to the second embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the internal structure of the screening part of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the screening drum of the third embodiment of the present invention.

[0028] Explanation of the accompanying drawings: 1-vibration frame, 2-vibration generator, 3-elastic base, 4-screening part, 5-screening cylinder, 6-frame assembly, 7-screen rod member, 8-installation groove, 9-insertion rod member, 10-adjustment frame, 11-wheel-shaped structure, 12-adjustment block, 13-driving mechanism two, 14-driving mechanism one. DETAILED DESCRIPTION

[0029] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0030] Embodiment 1

[0031] like Figures 1 to 4 , Figure 7 As shown, an embodiment of the present invention provides a vibrating screening device for coal preparation, including a vibrating frame and a screening part arranged on the vibrating frame, a vibration generator 2 is arranged on the vibrating frame 1, the vibrating frame has an elastic base 3, and the screening part 4 is arranged on the top of the frame. The vibration generator is used to realize the shaking of the vibrating frame and the screening part, thereby realizing the function of vibrating screening.

[0032] A screening unit is arranged in the screening part. Specifically, the screening unit comprises a screening cylinder 5, a driving mechanism 1 and a cleaning component.

[0033] The screening drum is rotatably arranged in the screening part, and comprises a frame assembly 6 and a plurality of screening rods 7 distributed along the periphery of the frame assembly, and a screening gap is provided between two adjacent screening rods.

[0034] The cross-section of the screen rod is a trapezoidal structure, and the area of ​​its contact surface with the coal particles is larger than the area of ​​the surface opposite to the contact surface. Compared with a square structure, a larger gap variable can be obtained by rotating the same angle. In addition, in order to further obtain a larger gap variable, one side of the trapezoidal structure is arc-shaped to prevent this side from reducing the gap on the other side after rotation.

[0035] The screening drum and the screening part both have inlets and outlets, which is an existing structure and will not be described in detail here.

[0036] Among them, the driving mechanism 14 is used to drive the screening drum to rotate.

[0037] In addition, during the vibration screening process, some coal particles happen to squeeze into the screening gap and cannot escape from the gap, which will cause blockage and affect the screening efficiency. Since the screening cylinder is located in the screening part, it is not convenient to clean it. Based on this, this embodiment is provided with a cleaning component.

[0038] The screening drum of this embodiment is cylindrical.

[0039] A plurality of mounting grooves 8 corresponding to the plurality of sieve rod members are provided on the inner side of the frame assembly, the sieve rod members are hinged in the mounting grooves, and elastic members are also provided in the mounting grooves. Under the action of the elastic members, the sieve rod members are in contact with the groove walls of the mounting grooves. Although the sieve rod members are fixed by the elastic members, they will not automatically open and close due to the vibration of the vibration frame. A plurality of plug-in rod members 9 corresponding to the plurality of sieve rod members are plugged into the frame assembly, one end of the plug-in rod member is in contact with the sieve rod member, and the other end extends out of the frame assembly.

[0040] The elastic member in this embodiment is a spring.

[0041] The cleaning assembly of this embodiment is arranged above the top of the screening drum, which is a wheel-shaped structure 11. During the rotation of the screening drum, the cleaning assembly can allow the screen rod members in its working area to rotate about the hinge point to increase the screening gap, thereby allowing the coal particles stuck in the screening gap to break away from it and enter the screening area. Specifically, during the rotation of the screening drum, a number of connectors abut against the cleaning assembly one by one, and the connectors move downward and abut against the screen rod members, so that the screen rod members rotate about the hinge center, thereby increasing the screening gap and allowing the stuck blockages to break away from the screening gap.

[0042] In some embodiments, a cleaning assembly and a cylinder unit (not shown in the figure) connected to the cleaning assembly are also provided below the bottom of the screening cylinder. The purpose of this is to discharge the remaining coal particles in the screening cylinder out of the screening cylinder after the screening is completed, into the screening part, and discharge them through the discharge port of the screening part. When discharge is required, the cleaning assembly is pushed by the cylinder unit to move to the moving path of the plug-in rod. During normal screening operation, the cylinder unit pulls the cleaning assembly away from the moving path of the plug-in rod, which will not affect the normal screening work.

[0043] Embodiment 2

[0044] like Figure 5-Figure 7 As shown, on the basis of the first embodiment, in order to realize the graded screening function, the vibration screening equipment for coal preparation of this embodiment also includes an adjusting component, and the adjusting component is used to adjust the gap between two adjacent screen rod members to adapt to the screening of coal particles of different particle sizes. Specifically, the adjusting component includes a plurality of adjusting blocks 12 respectively arranged on a plurality of plug-in rod members, an adjusting frame 10 plugged into the frame assembly, and a driving mechanism 13 for driving the adjusting frame to contact the adjusting block.

[0045] One side of the adjustment block is an inclined surface, and the adjustment frame contacts the inclined surface under the action of the second driving mechanism, so that the plug-in rod moves toward the screen rod member, driving several screen rod members to rotate synchronously at the same angle, thereby increasing the screening gap according to demand. After the increase, it does not affect the normal operation of the cleaning component.

[0046] Embodiment 3

[0047] like Figure 6-Figure 8 As shown, this embodiment provides a vibrating screening device for coal preparation. The difference between this embodiment and the first embodiment is that the screening cylinder is a square cylindrical structure. The vibrating screening device for coal preparation in this embodiment includes a vibrating frame and a screening part arranged on the vibrating frame. A vibration generator 2 is arranged on the vibrating frame 1. The vibrating frame has an elastic base 3. The screening part 4 is arranged on the top of the frame. The vibration generator is used to realize the shaking of the vibrating frame and the screening part, thereby realizing the function of vibration screening.

[0048] A screening unit is arranged in the screening part. Specifically, the screening unit comprises a screening cylinder 5, a driving mechanism 1 and a cleaning component.

[0049] The screening drum is rotatably arranged in the screening part, and comprises a frame assembly 6 and a plurality of screening rods 7 distributed along the periphery of the frame assembly, and a screening gap is provided between two adjacent screening rods.

[0050] The cross-section of the screen rod is a trapezoidal structure, and the area of ​​its contact surface with the coal particles is larger than the area of ​​the surface opposite to the contact surface. Compared with a square structure, a larger gap variable can be obtained by rotating the same angle. In addition, in order to further obtain a larger gap variable, one side of the trapezoidal structure is arc-shaped to prevent this side from reducing the gap on the other side after rotation.

[0051] Wherein, the driving mechanism 1 is used for driving the screening drum to rotate.

[0052] In addition, during the vibration screening process, some coal particles happen to squeeze into the screening gap and cannot escape from the gap, which will cause blockage and affect the screening efficiency. Since the screening cylinder is located in the screening part, it is not convenient to clean it. Based on this, this embodiment is provided with a cleaning component.

[0053] A plurality of mounting grooves 8 corresponding to the plurality of sieve rod members are provided on the inner side of the frame assembly, the sieve rod members are hinged in the mounting grooves, and elastic members are also provided in the mounting grooves. Under the action of the elastic members, the sieve rod members are in contact with the groove walls of the mounting grooves. Although the sieve rod members are fixed by the elastic members, they will not open and close automatically due to the vibration of the vibration frame. A plurality of plug-in rod members corresponding to the plurality of sieve rod members are plugged into the frame assembly, one end of the plug-in rod member is in contact with the sieve rod member, and the other end extends out of the frame assembly.

[0054] Due to the difference between round and square, the cleaning component of embodiment one cannot be applied to this embodiment. Therefore, the cleaning component of this embodiment is as follows (the cleaning component of this embodiment is actually the adjustment component of embodiment two): the cleaning component includes a plurality of adjustment blocks respectively arranged on a plurality of plug-in rod members, an adjustment frame plugged into the frame assembly, and a driving mechanism 2 for driving the adjustment frame to contact the adjustment block. There are four adjustment frames, corresponding to a plurality of plug-in rods on four sides.

[0055] One side of the adjustment block is an inclined surface, and the adjustment frame is in contact with the inclined surface under the action of the second driving mechanism, so that the plug-in rod moves toward the screen rod member, driving the screen rod member to rotate a certain angle, thereby increasing the screening gap according to demand, allowing the coal particles stuck in the screening gap to break away from it and enter the screening area for screening.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit and essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vibrating screening device for coal preparation, comprising a vibrating frame and a screening part arranged on the vibrating frame, wherein a screening unit is arranged in the screening part, characterized in that: The screening unit comprises: The screening cylinder is rotatably arranged in the screening part, and comprises a frame assembly and a plurality of screening rods distributed along the periphery of the frame assembly, and a screening gap is formed between two adjacent screening rods; A driving mechanism 1, used for driving the screening drum to rotate; and A cleaning assembly, which allows the screen bar members located in the working area of ​​the screen drum to rotate during the rotation of the screen drum to increase the screening gap; The frame assembly is provided with a plurality of mounting grooves corresponding to the plurality of sieve rods, the sieve rods are hinged in the mounting grooves, and an elastic member is also provided in the mounting grooves, under the action of the elastic member, the sieve rods are pressed against the groove wall of the mounting groove; The frame assembly is also plugged with a plurality of plug-in rods corresponding to the plurality of sieve rods one by one, one end of the plug-in rod is in contact with the sieve rod, and the other end extends out of the frame assembly; The cleaning assembly is arranged on the moving path of the plug rod member. During the rotation of the screening drum, the cleaning assembly will abut against one end of the plug rod member extending out of the frame assembly, so that the plug rod member abuts against the screening rod member, allowing the screening rod member to rotate around the hinge point as the center, thereby increasing the gap between at least one screening rod member adjacent to the plug rod member. Also included is an adjustment component, the adjustment component comprising: A plurality of adjustment blocks, which are respectively arranged on a plurality of plug rods, and one side of the adjustment block has a slope; An adjustment frame member, which is plugged into the frame assembly; The second driving mechanism is used to drive the adjustment frame to contact the inclined surfaces of several insertion rods, so that the insertion rods move in the length direction thereof, and the several screen rods rotate synchronously at the same angle, thereby adjusting the gap between adjacent screen rods.

2. The vibrating screening equipment for coal preparation according to claim 1, characterized in that: The screening cylinder is cylindrical or square.

3. The vibrating screening equipment for coal preparation according to claim 1, characterized in that: There are two cleaning components, which are respectively arranged above and below the screening cylinder.

4. The vibrating screening equipment for coal preparation according to claim 1, characterized in that: The cleaning component is a wheel-shaped structure.

5. The vibrating screening equipment for coal preparation according to claim 1, characterized in that: The cross section of the sieve bar member is trapezoidal.

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