Pulverized coal screening device

Abstract

The pulverized coal screening device comprises a collecting box and a protective cover fixedly connected to the upper end of the collecting box in a sleeved mode, an opening is formed in the upper end of the collecting box in a penetrating mode, an elastic net is fixedly installed at the opening, a dust box in butt joint with an inner cavity is fixedly arranged at the upper end of the protective cover, and a material guide plate is fixedly arranged on one side of the upper end of the collecting box in an inclined mode. A supporting seat for supporting the collecting box is arranged at the bottom of the collecting box, the connecting ends of the collecting box and the outer side of the supporting seat are rotationally connected through a movable rotating shaft, and an inserting rod is fixedly connected to the center of the bottom of the elastic net. The elastic net is arranged at the upper end of the collecting box, and the motor and the transmission structure are arranged, so that the bottom of the elastic net can be stretched and then loosened, coal briquettes at the upper end are bounced and dispersed, coal powder is rapidly screened, filtered and collected, and small coal ash dust is collected in cooperation with the dust box; the quality of combustion coal briquette finished products is ensured, and the combustion efficiency and the resource utilization rate are improved in a disguised manner.

Description

Technical Field

[0001] The utility model relates to the relevant field of thermal power plants, in particular to a coal powder screening device. Background Art

[0002] As we all know, a thermal power plant is abbreviated as a thermal power plant. It is a factory that uses coal, oil, and natural gas as fuel to produce electricity. Its basic production process is: the fuel burns in the boiler to heat water to make steam, and the chemical energy of the fuel is converted into thermal energy. The steam pressure drives the turbine to rotate, and the thermal energy is converted into mechanical energy. Then the turbine drives the generator to rotate and converts the mechanical energy into electrical energy. The working principle of thermal power plant power generation is to use coal as the primary energy source, use belt transmission technology, and the boiler transports the treated coal powder. After the coal powder is burned to heat the water in the boiler once, the water vapor enters the high-pressure cylinder. In order to improve the thermal efficiency, the water vapor is heated for a second time, and the water vapor enters the medium-pressure cylinder. The steam drives the steam turbine generator to generate electricity.

[0003] The stored coal will produce coal powder during transportation. The mixture of coal powder and coal lumps will affect the combustion efficiency when they are sent into the boiler for combustion. Therefore, it is necessary to screen and separate the coal powder and coal lumps to improve the combustion efficiency of the coal and thus improve the utilization of resources. Utility Model Content

[0004] The utility model designs a coal powder screening device to solve the technical problems raised in the background technology and proposes the following technical solutions:

[0005] A coal powder screening device comprises a collecting box and a protective cover fixedly sleeved on the upper end of the collecting box, the upper end of the collecting box is penetrated with an opening, and an elastic net is fixedly installed at the opening, the upper end of the protective cover is fixedly provided with a dust box docked with an inner cavity, a guide plate is fixedly and inclinedly provided on one side of the upper end of the collecting box, a support seat for supporting it is provided at the bottom of the collecting box, and the connecting end of the collecting box and the outer side of the support seat is rotatably connected by a movable rotating shaft, a plug rod is fixedly connected at the center of the bottom of the elastic net, and a plug interface for facilitating the movable plugging of the plug rod is penetrated at the bottom of the collecting box, and a motor for driving the plug rod to slide up and down in the plug interface is also fixedly connected to the bottom of the collecting box.

[0006] Preferably, the front of the collection box and the dust box are both provided with matching box doors, and the front of the outer box door of the collection box is also provided with a switch group.

[0007] Preferably, an exhaust fan connected to the inner cavity is arranged at the upper end of the dust box, and a connecting pipe is connected to the outer side of the dust box, and the connecting pipe movably penetrates the outer wall of the protective cover and extends to the inner cavity.

[0008] Preferably, the upper end of the support seat is also fixedly connected to an electric push rod, and the power end of the electric push rod is movably provided with a support plate abutting against the bottom of the collection box, and the support plate is rotatably connected to the power end of the electric push rod through a damping shaft.

[0009] Preferably, the outer wall of the plug rod is longitudinally provided with tooth grooves, and the power end of the motor is fixedly connected with a turntable engaged with the tooth grooves.

[0010] Preferably, half of the outer wall of the turntable is evenly provided with latching teeth engaged with the tooth grooves.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model configures an elastic net at the upper end of the collection box and utilizes the setting of the motor and the transmission structure to stretch the bottom of the elastic net and then release it to bounce and disperse the coal blocks at the upper end, thereby quickly screening and filtering the coal powder for collection, and cooperates with the dust box to collect smaller coal ash dust, thereby ensuring the quality of the finished product of the burned coal blocks and improving the combustion efficiency and resource utilization rate in disguised form;

[0013] On this basis, the elastic net used in this device cooperates with the transmission structure design to bounce up the coal blocks piled up at the upper end and fully disperse them, so as to avoid the coal block accumulation affecting the screening of coal powder. Compared with the traditional vibration motor vibration screening structure, this device has better dispersion effect and small overall movement and noise, which can maintain the stability of the equipment during operation.

[0014] On this basis, this device uses an electric push rod structure in conjunction with a support base that is rotatably connected to the collection box, so that the angle of the collection box can be adjusted after screening is completed, making it convenient to quickly dump out the coal blocks at the upper end, effectively improving the overall material unloading efficiency, and the practical effect is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the collection box of the utility model;

[0017] Figure 3 It is an enlarged schematic diagram of the structure at point A of the utility model.

[0018] In the figure: 1-collection box, 101-box door, 102-switch group, 2-elastic net, 3-protective cover, 4-dust box, 401-exhaust fan, 402-connecting pipe, 5-material guide plate, 6-support seat, 601-electric push rod, 602-support plate, 603-damping shaft, 7-movable shaft, 8-plug rod, 801-tooth groove, 9-plug interface, 10-motor, 1001-turntable. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Manual Attached Figure 1-3 A coal powder screening device comprises a collecting box 1 and a protective cover 3 fixedly sleeved on the upper end of the collecting box 1, an opening is penetrated at the upper end of the collecting box 1, and an elastic net 2 is fixedly installed at the opening, a dust box 4 docked with the inner cavity is fixedly arranged on the upper end of the protective cover 3, a guide plate 5 is fixedly and tiltedly arranged on one side of the upper end of the collecting box 1, a support seat 6 for supporting it is arranged at the bottom of the collecting box 1, and the connecting end of the collecting box 1 and the outer side of the support seat 6 is rotatably connected through a movable rotating shaft 7, a plug-in rod 8 is fixedly connected at the center of the bottom of the elastic net 2, and a plug-in interface 9 for facilitating the active plug-in of the plug-in rod 8 is penetrated at the bottom of the collecting box 1, and a motor 10 for driving the plug-in rod 8 to slide up and down in the plug-in interface 9 is also fixedly connected to the bottom of the collecting box 1, a tooth groove 801 is longitudinally arranged on the outer wall of the plug-in rod 8, and a turntable 1001 engaged with the tooth groove 801 is fixedly connected to the power end of the motor 10, and half of the outer wall of the turntable 1001 is evenly provided with teeth engaged with the tooth groove 801.

[0024] Based on the above structure, when the device is in use, the staff guides the coal blocks into the elastic net 2 at the upper end of the collection box 1 through the guide plate 5, and then starts the motor 10. The outer half of the teeth of the turntable 1001 at the power end of the motor 10 are engaged with the tooth groove 801 on the outer side of the plug-in rod 8 in turn. When the turntable 1001 engages with the tooth groove 801, it drives the plug-in rod 8 to slide downward and stretch the bottom of the elastic net 2 to form a funnel shape. When the turntable 1001 is disengaged from the tooth groove 801, the elastic restoring force of the elastic net 2 decreases, and the coal blocks at the upper end bounce up and disperse, and then the coal powder therein is filtered by the elastic net 2 and collected into the collection box 1, thereby ensuring the quality of the finished product of the burned coal blocks and improving the combustion efficiency and resource utilization in disguised form; at the same time, the protective cover 3 can prevent fine coal ash dust from splashing to the outside, and the subsequent screening can be completed and collected through the dust box 4.

[0025] It should be noted that due to the setting of the tooth groove 801, there is still a certain gap between it and the plug interface 9. When in use, the lateral depth of the tooth groove 801 can be controlled between 1.5mm-3mm to reduce the probability of coal powder falling from the collection box 1. At the same time, a collection bucket can also be set at the bottom of the plug interface 9 to collect and process a small amount of overflowed coal powder.

[0026] Among them, the front of the collecting box 1 and the dust box 4 are both provided with matching box doors 101, which are convenient for the subsequent unified treatment of the internal coal powder and dust, and the front of the outer box door 101 of the collecting box 1 is also provided with a switch group 102 to control the electrical components.

[0027] Among them, an exhaust fan 401 connected to the inner cavity is arranged at the upper end of the dust box 4, and a connecting pipe 402 is connected to the outer side of the dust box 4, and the connecting pipe 402 movably penetrates the outer wall of the protective cover 3 and extends to the inner cavity. After the elastic net 2 screens the coal powder, some very small dust is isolated in the protective cover 3, and can be extracted into the dust box 4 for collection through the exhaust fan 401 and the connecting pipe 402.

[0028] Among them, the upper end of the support seat 6 is also fixedly connected to an electric push rod 601, and the power end of the electric push rod 601 is movably provided with a support plate 602 abutting against the bottom of the collecting box 1, and the support plate 602 is rotatably connected to the power end of the electric push rod 601 through a damping shaft 603. After the screening is completed, the electric push rod 601 can be retracted and lowered. At this time, the movable shaft 7 at the connecting end of the support seat 6 and the collecting box 1 rotates to tilt the collecting box 1, which is convenient for the smooth discharge of coal blocks on the right side. In addition, the support plate 602 rotatably connected to the upper end of the electric push rod 601 is connected through the damping shaft 603, so that the support plate 602 can be leveled to support the collecting box 1. At the same time, after the collecting box 1 tilts at an angle, the force on the support plate 602 will also synchronously adjust the angle through the damping shaft 603, which is convenient for the smooth tilting and discharge of the collecting box 1.

[0029] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Claims

1. A coal powder screening device, comprising a collecting box (1) and a protective cover (3) fixedly sleeved on the upper end of the collecting box (1), characterized in that: The upper end of the collecting box (1) is provided with an opening through it, and an elastic net (2) is fixedly installed at the opening; the upper end of the protective cover (3) is fixedly provided with a dust box (4) connected to the inner cavity; one side of the upper end of the collecting box (1) is fixedly provided with a guide plate (5) at an angle; the bottom of the collecting box (1) is provided with a support seat (6) for supporting it, and the connecting end of the collecting box (1) and the outer side of the support seat (6) are rotatably connected through a movable rotating shaft (7); a plug-in rod (8) is fixedly connected at the center of the bottom of the elastic net (2), and a plug-in interface (9) for facilitating the active plug-in of the plug-in rod (8) is provided through the bottom of the collecting box (1), and a motor (10) for driving the plug-in rod (8) to slide up and down in the plug-in interface (9) is also fixedly connected to the bottom of the collecting box (1).

2. A pulverized coal screening device according to claim 1, characterized in that: The front sides of the collection box (1) and the dust box (4) are both provided with matching box doors (101), and the front side of the outer box door (101) of the collection box (1) is also provided with a switch group (102).

3. A pulverized coal screening device according to claim 2, characterized in that: An exhaust fan (401) communicating with the inner cavity is disposed at the upper end of the dust box (4), and a connecting pipe (402) is connected to the outer side of the dust box (4), and the connecting pipe (402) movably penetrates the outer wall of the protective cover (3) and extends to the inner cavity.

4. A pulverized coal screening device according to claim 3, characterized in that: The upper end of the support seat (6) is also fixedly connected to an electric push rod (601), and the power end of the electric push rod (601) is movably provided with a support plate (602) that abuts against the bottom of the collection box (1), and the support plate (602) is rotatably connected to the power end of the electric push rod (601) via a damping shaft (603).

5. A pulverized coal screening device according to claim 4, characterized in that: The outer wall of the plug-in rod (8) is longitudinally provided with a tooth groove (801), and the power end of the motor (10) is fixedly connected with a rotating disk (1001) that is clamped in the tooth groove (801).

6. A pulverized coal screening device according to claim 5, characterized in that: Half of the outer wall of the rotating disk (1001) is evenly provided with latching teeth that engage with the tooth grooves (801).

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