A post-drum screening device with built-in calibration function

Abstract

This utility model discloses a drum screening device with built-in calibration function. It has a frame, with a drum screen cover inclinedly mounted on the top of the frame. A drum screen is installed inside the drum screen cover. The lower end of the drum screen cover is hinged to the frame, and the lower end of the drum screen cover is supported by a lifting adjustment rod mechanism. A feed inlet is located at the top of the higher end of the drum screen cover, feeding material into the drum screen. A geared motor is also located at the top of the frame, connected to the rotating shaft of the drum screen via a coupling, driving the drum screen to rotate. The drum screen is arranged sequentially from the higher end to the lower end as a small-sized round-hole screen, a medium-sized round-hole screen, and a large-sized round-hole screen. A hopper scale is provided for each of the small-sized, medium-sized, and large-sized round-hole screens. The hopper scale consists of a weighing hopper, a self-calibration device, a weighing sensor, an electric push rod, and a hopper scale door. This screening device can quickly calibrate, improving weighing accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for blast furnace ironmaking, and in particular to a post-drum screening device with built-in calibration function. Background Technology

[0002] Coke is one of the essential raw materials for blast furnace ironmaking. The mechanical strength of coke is a crucial indicator of its ability to support the furnace structure and ensure normal blast furnace operation. Coke with poor mechanical strength will break down during transport and descent within the blast furnace due to the mutual compression and friction between the charge and the furnace walls, producing a lot of broken coke and powder. This hinders the permeability of the charge, leading to poor furnace operation, reduced output, and an increased coke ratio.

[0003] Drum strength is an important indicator of the mechanical strength of coke, characterizing its resistance to breakage and abrasion at room temperature. Typically, coke particles larger than 60mm are placed in a drum and rotated 100 times, then sieved using 10mm and 40mm round-hole sieves. The weights of particles smaller than 10mm, 10-40mm, and larger than 40mm are weighed to calculate coke M10 and M40. Many companies have upgraded and renovated automated equipment for analyzing coke drums, but current online automated equipment still has some problems with its sieving and weighing devices: the unavoidable dust and mechanical vibration generated during equipment operation lead to insufficient stability of the weighing hopper. While periodic calibration by professionals can ensure stability for a period, real-time calibration of the hopper cannot be achieved, affecting the accuracy of the analysis. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned issues by providing a post-drum sieving device with built-in calibration function. This sieving device can be quickly calibrated, thereby improving weighing accuracy.

[0005] The specific solution of this utility model is as follows: a drum screening device with built-in calibration function, comprising a frame, a drum screen cover inclinedly arranged on the top of the frame, a drum screen disposed inside the drum screen cover, a lower end of the drum screen cover being hinged to the frame, and a higher end of the drum screen cover being supported and connected at the bottom by a lifting adjustment rod mechanism; a feed inlet is provided at the top of the higher end of the drum screen cover, which feeds material into the drum screen; a reduction motor is also provided at the top of the frame, and the reduction motor is connected to the drum screen via a coupling. A rotating shaft drives and rotates the drum screen. The drum screen is arranged in three sections from high to low: a small-sized round-hole screen, a medium-sized round-hole screen, and a large-sized round-hole screen, which are connected to form a whole. A set of bucket scales is provided for each of the small-sized, medium-sized, and large-sized round-hole screens, and each set of bucket scales is connected to the bottom of the corresponding screen. The bucket scale consists of a weighing bucket, a self-calibration device, a weighing sensor, an electric push rod, and a bucket scale door. The weighing bucket is connected to the frame through the weighing sensor.

[0006] Furthermore, the self-calibration device described in this utility model includes a weight box, calibration weights, and a calibration lifting motor. The calibration lifting motor is connected to the weighing hopper and is positioned on the side opposite to the weighing sensor. The calibration lifting motor is connected to the calibration weights via a pull rope or pull rod, and the calibration weights are placed in the weight box.

[0007] Furthermore, the small-sized, medium-sized, and large-sized round-hole screens described in this utility model correspond to coke with particle sizes of less than 10mm, 10-40mm, and greater than 40mm, respectively. The small-sized round-hole screen has a mesh size of 10mm, the medium-sized round-hole screen has a mesh size of 40mm, and the large-sized round-hole screen has a mesh size greater than 40mm.

[0008] Furthermore, the lifting and adjusting rod mechanism described in this utility model consists of two supporting screws, which support the drum screen cover and are locked with nuts.

[0009] Furthermore, in this utility model, the electric push rod is installed on the front and rear sides of the weighing hopper, and the weighing hopper door is hinged at the lower outlet of the weighing hopper. The weighing hopper door is opened or closed by being driven by the electric push rod.

[0010] Furthermore, the frame described in this utility model is made of steel structure, and the top surface of the frame is set as a sloping structure.

[0011] Furthermore, the top surface of the drum screen cover described in this utility model is also provided with four observation windows.

[0012] The beneficial effects of this utility model are as follows: The drum screen in this utility model is equipped with a lifting adjustment rod mechanism on one side of the drum screen cover, which can manually adjust the tilt angle of the drum screen, thereby adjusting the screening efficiency; a self-calibration device is installed on the bucket scale below the drum screen, which can automatically calibrate the bucket scale before each drum screening, or it can be manually calibrated with one click through the computer or the button in the control box, thereby improving the weighing accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure from the main view direction of this utility model;

[0014] Figure 2 This is a side view structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the bucket scale in this utility model.

[0016] In the diagram: 1—Drum screen cover, 2—Frame, 3—Gear motor, 4—Rotating shaft, 5—Medium-sized round hole screen, 6—Small-sized round hole screen, 7—Observation window, 8—Feed inlet, 9—Lifting and adjusting rod mechanism, 10—Basket scale, 11—Calibration lifting motor, 12—Calibration weight, 13—Weight box, 14—Weighing sensor, 15—Electric push rod, 16—Basket scale door. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] See Figures 1-3This utility model is a drum screening device with a built-in calibration function. It has a frame 2, with a drum screen cover 1 inclinedly mounted on the top of the frame. A drum screen is installed inside the drum screen cover. The lower end of the drum screen cover is hinged to the frame, and the lower end of the drum screen cover is supported by a lifting adjustment rod mechanism 9. Furthermore, the lifting adjustment rod mechanism consists of two supporting screws that support the drum screen cover and are locked with nuts. A feed inlet 8 is located at the top of the higher end of the drum screen cover, feeding material into the drum screen. A reduction motor 3 is also located at the top of the frame, connected to the rotating shaft 4 of the drum screen via a coupling, driving the drum screen to rotate. The drum screens are arranged in smaller sizes from the higher end to the lower end. A three-section screen—a small round-hole screen 6, a medium-sized round-hole screen 5, and a large round-hole screen—are sequentially connected to form a single unit. Furthermore, the small, medium, and large round-hole screens in this invention correspond to coke particles smaller than 10mm, 10-40mm, and larger than 40mm in diameter, respectively. The small round-hole screen has a 10mm aperture, the medium round-hole screen has a 40mm aperture, and the large round-hole screen has an aperture larger than 40mm. A set of weighing scales 10 is provided for each of the small, medium, and large round-hole screens, with each set connected below the corresponding screen. Each weighing scale consists of a weighing hopper, a self-calibration device, a weighing sensor 14, an electric push rod 15, and a weighing scale door 16. The weighing hopper is connected to the frame via the weighing sensor. Furthermore, the self-calibration device described in this utility model includes a weight box 13, calibration weights 12, and a calibration lifting motor 11. The calibration lifting motor is connected to the weighing hopper and is placed on the side opposite to the weighing sensor. The calibration lifting motor is connected to the calibration weights via a pull rope or pull rod, and the calibration weights are placed in the weight box.

[0020] Furthermore, in this embodiment, the electric push rod is installed on the front and rear sides of the weighing hopper, and the weighing hopper door is hinged at the lower outlet of the weighing hopper. The weighing hopper door is opened or closed by being driven by the electric push rod.

[0021] Furthermore, the frame described in this utility model is made of steel structure, and the top surface of the frame is set as a sloping structure.

[0022] Furthermore, the top surface of the drum screen cover described in this utility model is also provided with 4 observation windows 7.

[0023] like Figure 1 , Figure 2As shown: The drum screens and drum screen covers are installed together on the upper layer of the frame. The geared motor 3 is connected to the rotating shaft 4 via a coupling, driving the three drum screens to rotate and screen together. The drum screens are divided into three sections with different aperture sizes: a small round hole screen with an aperture of 10mm, a medium round hole screen with an aperture of 40mm, and a large round hole screen with an aperture greater than 40mm. These three sections are installed in a cylindrical shape. The coke after the drum rotates enters the rotating cylindrical screen through the feed inlet 8 for screening. The support screw in the lifting and adjusting rod mechanism 9 at one end of the drum screen cover can adjust the tilt angle of the entire screen body, thereby adjusting the feeding speed and screening efficiency. Four observation windows 7 are provided on the upper wall of the drum screen cover to view the internal condition of the screen. Three bucket scales are installed on the lower layer of the frame, corresponding to coke with particle sizes less than 10mm, 10-40mm, and greater than 40mm, respectively.

[0024] like Figure 3 As shown: The scale 10 consists of a weighing hopper, a self-calibration device, a load cell, an electric push rod, and a scale door. The weighing hopper is connected to the frame via the load cell and extends out and is suspended in the air. A self-calibration device is installed on the other side of the weighing hopper. When the calibration lifting motor in the self-calibration device retracts and rises, it will lift the calibration weight 12 to calibrate the scale. When calibration is not needed, the calibration lifting motor lowers and places the calibration weight at the bottom of the weight box. The calibration weight 12 is placed inside the weight box 13 to prevent dust from affecting it. The size of the calibration weight can be changed to achieve different calibration weights. Two electric push rods 15 are installed on both sides of the scale to open the scale door 16.

[0025] The specific calibration process is as follows: Calibration can be performed together with the weighing sensor and the computer. First, place the calibration weight at the bottom of the weight box. At this time, there is no weight hanging on the weighing sensor, and the display shows zero. Then, raise the corresponding weight of the calibration weight to the required reference weight, and then weighing can be performed sequentially. The bucket scale can be automatically calibrated before each drum screening, or it can be manually calibrated with one click through the computer or the button in the control box to improve weighing accuracy.

[0026] The drum screen in this invention is equipped with a lifting and adjusting rod mechanism on one side of the drum screen cover, which allows manual adjustment of the tilt angle of the drum screen, thereby adjusting the screening efficiency. The bucket scale below the drum screen is equipped with a self-calibration device, which can automatically calibrate the bucket scale before each drum screening. It can also be manually calibrated with one click via a button on the computer or in the control box, improving weighing accuracy.

Claims

1. A post-drum screening device with built-in calibration function, comprising a frame, characterized in that: The top of the frame is inclined with a drum screen cover, inside which a drum screen is installed. The lower end of the drum screen cover is hinged to the frame, and the bottom of the higher end of the drum screen cover is supported by a lifting adjustment rod mechanism. The top of the higher end of the drum screen cover has a feed inlet that supplies material into the drum screen. The top of the frame also has a geared motor, which is connected to the rotating shaft of the drum screen through a coupling and drives the drum screen to rotate. The drum screen is arranged in three sections from the higher end to the lower end: a small-sized round hole screen, a medium-sized round hole screen, and a large-sized round hole screen, which are connected in sequence to form a whole. A set of bucket scales is provided for each of the small-sized, medium-sized, and large-sized round hole screens, and each set of bucket scales is connected to the bottom of the corresponding screen. The bucket scale consists of a weighing bucket, a self-calibration device, a weighing sensor, an electric push rod, and a bucket scale door. The weighing bucket is connected to the frame through the weighing sensor.

2. A drum post screening apparatus with self-calibration function according to claim 1, characterized in that: The self-calibration device includes a weight box, calibration weights, and a calibration lifting motor. The calibration lifting motor is connected to the weighing hopper and is positioned on the side opposite to the weighing sensor. The calibration lifting motor is connected to the calibration weights via a pull rope or rod, and the calibration weights are placed in the weight box.

3. A drum post screening apparatus with self-calibration function according to claim 1, characterized in that: The small, medium, and large round hole screens correspond to coke particles smaller than 10mm, 10-40mm, and larger than 40mm, respectively. The small round hole screen has a mesh size of 10mm, the medium round hole screen has a mesh size of 40mm, and the large round hole screen has a mesh size greater than 40mm.

4. A drum post screening apparatus with self-calibration function according to claim 1, characterized in that: The lifting and adjusting rod mechanism consists of two supporting screws, which support the drum screen cover and are locked with nuts.

5. A drum post screening apparatus with self-calibration function according to claim 1, characterized in that: The electric push rods are installed on the front and rear sides of the weighing hopper, and the weighing hopper door is hinged at the lower outlet of the weighing hopper. The weighing hopper door is opened or closed by being driven by the electric push rods.

6. A drum post screening apparatus with self-calibration function according to claim 1, characterized in that: The frame is made of steel structure, and the top surface of the frame is set as a sloping structure.

7. The post-drum screening device with built-in calibration function according to claim 1, characterized in that: The top surface of the drum screen cover is also provided with four observation windows.

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