A type of mikum drum

Abstract

This utility model discloses a mikum drum, including a frame, a roller horizontally placed on the frame, and a drive device connected to the roller to drive its rotation. A cover plate is provided on the end face of the roller, and the cover plate is opened or closed via a detachable crank handle. The frame has a receiving slot matching the shape of the crank handle, and a sensing component connected to the drive device is located in the receiving slot. The drive device can only be activated when the crank handle is placed in the receiving slot. This utility model, by setting a limiting slot on the mikum drum, links the activation of the drive device to the position of the crank handle and the activation state of the drive device, eliminating safety accidents caused by activating the drive device without removing the crank handle from the cover plate, and significantly improving the safety of the mikum drum.

Description

Technical Field

[0001] This utility model relates to the technical field of coke detection devices, and in particular to a Mikum rotary drum. Background Technology

[0002] The cold strength of coke is one of the most important properties characterizing coke. The most common method for determining the cold strength of coke is the Mikum drum method. The Mikum drum method uses coke standards with crush resistance M40 or M25 and abrasion strength M10 to evaluate the cold strength of coke.

[0003] In the experiment conducted using the Mikum drum method, the operator places coke into the Mikum drum. Inside the rotating drum, the coke is continuously lifted by the lifting plate, causing it to fall onto the steel wall inside the drum. During this process, the coke is subjected to mechanical forces, resulting in impacts and friction within the drum. This causes the coke to break along cracks and experience surface wear. The degree of breakage and wear is then used to determine the coke's crush resistance and abrasion resistance, thereby assessing the coke's cold strength.

[0004] During the operation of the Mikum drum, the drum cover needs to be opened and closed when loading, unloading or cleaning coke samples. At this time, the drum body needs to be manually rotated to the appropriate position by cranking the handle. If the operator forgets to pull out the crank handle when starting the equipment experiment, the high-speed rotating motor will drive the crank handle to rotate at high speed, which may even cause the crank handle to be thrown out and cause an accident. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of safety in existing Mikum drums and to provide a Mikum drum that uses a receiving slot on the base frame and a sensing component connected to the drive device in the receiving slot. This ensures that the crank handle can only be removed from the cover and placed into the receiving slot to trigger the sensing component and start the drive device, thereby avoiding safety accidents caused by starting the drive device without removing the crank handle from the cover and significantly improving the safety of the Mikum drum.

[0006] This utility model provides a Mikum drum, including a frame, a roller horizontally placed on the frame, and a drive device connected to the roller to drive the roller to rotate. The end face of the roller is provided with a cover plate, which is opened or closed by connecting a detachable crank handle.

[0007] The frame is provided with a receiving slot that matches the shape of the crank handle. The receiving slot is provided with a sensing component connected to the drive device. The drive device can only be activated when the crank handle is placed in the receiving slot.

[0008] In one alternative technical solution, the accommodating slot includes a plurality of upwardly protruding limiting members and at least one mounting plate, wherein the sensing component is mounted on the mounting plate.

[0009] In one alternative embodiment, the sensing component includes a proximity switch mounted on the mounting plate with its sensing end facing the receiving slot, the proximity switch being electrically connected to the driving device.

[0010] In one of the alternative technical solutions, the two ends of the crank handle are respectively provided with a sensing part and a limiting part. When the crank handle is placed in the receiving slot, the sensing part is close to the proximity switch, and the limiting part is engaged in the receiving slot.

[0011] In one of the alternative technical solutions, the accommodating slot includes at least four limiting members, the limiting members being cylindrical structures, two of the limiting members being disposed on both sides of the limiting portion, and two of the limiting members being disposed on both sides of the sensing portion.

[0012] In one alternative embodiment, the sensing component includes an infrared sensor mounted on the mounting plate with its emitting end facing the receiving card slot.

[0013] In one of the alternative technical solutions, the receiving slot is a recessed structure that matches the crank handle, and the sensing component is disposed at the bottom of the receiving slot.

[0014] In one of the alternative technical solutions, the sensing component includes at least one pressing element, wherein the crank handle presses the pressing button downward when the crank handle is placed in the receiving slot.

[0015] In one of the alternative technical solutions, the receiving slot is vertically arranged on the frame, and the receiving slot is provided with a hook that matches the crank handle, and the sensing component is connected to the hook.

[0016] In one alternative embodiment, the hook is movable up and down relative to the receiving slot, and the sensing component includes a pressure sensor disposed below the hook.

[0017] The above technical solution has the following beneficial effects:

[0018] The Mikum rotary drum provided by this utility model has a receiving slot on the frame for storing the crank handle. A sensing component is installed in the receiving slot to ensure that the drive device can only be started after the crank handle is removed from the drum and stored in the receiving slot after the drum is fed. This ensures that the crank handle is removed from the cover plate and stored in the receiving slot after each feeding or unloading and before the drive device is powered on. This ensures that the crank handle will not connect to the cover plate of the drum while the drum is rotating, eliminating the accident of the crank handle being thrown off the rotating drum and ensuring the safety of the operator. Attached Figure Description

[0019] The disclosure of this utility model will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0020] Figure 1 A perspective view of a Mikum drum provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the receiving slot and the crank handle provided in an embodiment of the present utility model;

[0022] Figure 3 A cross-sectional view of the receiving slot and crank handle provided in an embodiment of the present utility model;

[0023] Figure 4 A side view of the receiving slot and crank handle provided in an embodiment of the present utility model.

[0024] Figure reference numerals:

[0025] 1. Rack;

[0026] 2. Roller; 21. Cover plate;

[0027] 3. Drive unit;

[0028] 4. Crank handle; 41. Sensor; 42. Limiting part;

[0029] 5. Card slot; 51. Limiting component; 52. Mounting plate;

[0030] 6. Sensing components. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] In this utility model, unless otherwise explicitly specified and limited, the term "fixed" and similar terms should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] like Figure 1 As shown, an embodiment of this utility model provides a mikum drum, including a frame 1, a roller 2 horizontally placed on the frame 1, and a drive device 3 connected to the roller 2 to drive the roller 2 to rotate. A cover plate 21 is provided on the end face of the roller 2, and the cover plate 21 is opened or closed by connecting a detachable crank handle 4. The frame 1 is provided with a receiving slot 5 that matches the shape of the crank handle 4. A sensing component 6 connected to the drive device 3 is provided in the receiving slot 5. The drive device 3 can only be activated when the crank handle 4 is placed in the receiving slot 5.

[0034] The Mikum drum may also include auxiliary devices such as a discharge device and a counting device. The frame 1, welded from structural steel, primarily serves a supporting function, and all components are mounted on the frame 1. The drum 2 is the main component of the equipment; it is made of rolled steel plate and is supported on a bracket via half-shafts, bearings, and bearing seats at both ends, forming a freely rotating cylinder. The cylinder has an opening that can be opened and closed for sealing. Inside the cylinder are welded steel reinforcing plates. When coke is placed inside the drum 2 and it rotates, the coke rolls along with it and is thrown down and crushed by self-impact under the action of the steel reinforcing plates. After reaching a preset number, the drum 2 stops rotating, and the coke is discharged from the opening, completing one set test cycle. The drive unit 3 includes a motor, coupling, worm gear reducer, etc., which drives the drum 2 to operate at a suitable constant speed.

[0035] The cover plate 21 on the end face of the drum 2 is opened and closed via a detachable crank handle 4. The two ends of the horizontally placed cylindrical drum 2 are hinged to the frame 1. The drive unit 3 is connected to the drum 2, transmitting power to the drum 2 so that it can rotate around the frame 1, thereby conducting experiments on the coke inside the drum 2. Before or after the experiment, the operator can manually adjust the opening and closing state of the cover plate 21 on the end face of the drum 2 by rotating the handle, thereby loading and unloading coke. A receiving slot 5 matching the shape of the crank handle 4 is provided on the frame 1. The sensing component 6 installed inside the slot is linked to the control system of the drive unit 3. When the crank handle 4 is not properly inserted into the receiving slot 5, the sensing component 6 will send a locking signal to the drive unit 3, preventing the equipment from starting. Only when the handle is fully inserted into the slot and detected by the sensing component 6 will the circuit of the drive unit 3 be turned on, allowing the drive unit 3 to be powered on and the drum 2 to enter the operating state.

[0036] Therefore, the physical storage design of the card slot 5 forces operators to store the handle in the designated position, eliminating the possibility of leaving the handle on the drum from the operational process. The handle storage action is strongly correlated with the equipment start-up conditions, preventing operators from bypassing safety procedures to directly start the equipment. The electrical interlock between the sensing component 6 and the drive unit 3 constitutes a rigid safety barrier. Even if the operator accidentally touches the start button, as long as the handle is not properly stored, the control circuit of the drive unit 3 will remain open, fundamentally eliminating the risk of misoperation.

[0037] In summary, the Mikum drum provided in this embodiment of the present invention, by setting a receiving slot 5 on the frame 1 for storing the crank handle 4 and setting a sensing component 6 in the receiving slot 5, ensures that the drive device 3 can only be started after the crank handle 4 is removed from the roller 2 and stored in the receiving slot 5 after the roller 2 has finished feeding. It also ensures that the crank handle 4 is removed from the cover plate 21 and stored in the receiving slot 5 after each feeding or unloading and before the drive device 3 is powered on. This ensures that the crank handle 4 will not connect to the cover plate 21 of the roller 2 while the roller 2 is rotating, thus preventing the crank handle 4 from being thrown off the rotating roller 2 and ensuring the safety of the operator.

[0038] In practical implementation, the geometry of the receiving slot 5 precisely matches the contour of the operating end of the crank handle 4. For example, a polygonal groove is used to match the hexagonal grip of the handle, ensuring that the handle can only be inserted in one direction. The installation position of the sensing component 6 is redundantly designed, and its detection range covers key feature parts of the handle, such as protruding structures or metal parts, to prevent false judgments caused by partial insertion of the handle. The control logic of the drive device 3 can further integrate a delayed start function, that is, after the handle is retracted, the detection signal must be maintained for 2-3 seconds before start-up is allowed, avoiding instantaneous false triggering.

[0039] As needed, the sensing component 6 can be replaced with a mechanical locking structure, which triggers the physical locking tongue displacement by inserting the handle, directly controlling the power switch of the drive device 3. Alternatively, radio frequency identification (RFID) technology can be used to embed an electronic tag in the handle. When the tag enters the reading range of the card slot 5, the drive device 3 is activated. A gravity sensor can also be installed in the card slot 5 to determine the storage status by detecting whether the weight of the handle reaches a threshold.

[0040] In one embodiment, the receiving slot 5 includes a plurality of upwardly protruding limiting members 51 and at least one mounting plate 52, and the sensing component 6 is mounted on the mounting plate 52.

[0041] In this embodiment, the frame 1 of the Mikum drum is provided with a receiving slot 5 on its side, which is adapted to the contour of the crank handle 4, and its internal space can completely accommodate the crank handle 4. A mounting plate 52 perpendicular to the ground is welded to the bottom of the receiving slot 5, and an electromagnetic induction proximity switch is installed on the plate surface. This switch is connected in series with the control circuit of the drive motor through a wire. After the operator completes the opening and closing operation of the drum cover 21, the crank handle 4 must be vertically inserted into the receiving slot 5, so that the end of the handle maintains a sensing distance of 5-8mm from the proximity switch. At this time, the proximity switch generates a conduction signal, and the main control circuit of the drive device 3 forms a closed loop to start. If the crank handle 4 is not properly stored, the proximity switch is in an open circuit state, and the drive motor will not be powered on. This design completely eliminates the safety hazards caused by the handle being left behind through the dual protection of mandatory physical storage and electrical interlock. In an alternative embodiment, the receiving slot 5 can be replaced with an inclined guide structure, or a conspicuous fluorescent marking area can be set on the surface of the frame 1 to enhance operation guidance.

[0042] In one embodiment, the sensing component 6 includes a proximity switch mounted on the mounting plate 52 with its sensing end facing the receiving slot 5, and the proximity switch is electrically connected to the driving device 3.

[0043] Furthermore, the crank handle 4 is provided with a sensing part 41 and a limiting part 42 at both ends. When the crank handle 4 is placed in the receiving slot 5, the sensing part 41 approaches the proximity switch and the limiting part 42 is engaged in the receiving slot 5.

[0044] Furthermore, the accommodating slot 5 includes at least four limiting members 51, which are cylindrical in shape. Two limiting members 51 are disposed on both sides of the limiting part 42, and two limiting members 51 are disposed on both sides of the sensing part 41.

[0045] In this embodiment, the receiving slot 5 adopts a four-column positioning structure, with four cylindrical limiting members 51 arranged in a rectangular array. The distance between two of the limiting members 51 is slightly larger than the width of the limiting part 42 of the crank handle 4, used to constrain the horizontal displacement of the handle; the other two limiting members 51 are located on both sides of the handle sensing part 41, forming a guide channel. The crank handle 4 adopts an asymmetrical design, with the limiting part 42 having a widened flange structure, forming an interference fit with the limiting members 51 when inserted into the slot, ensuring mechanical positioning accuracy. The sensing part 41 is designed as a flat metal sheet; when it enters the effective detection range of the proximity switch, the sensor identifies the metal target object through inductive coupling. This structure, through the synergistic effect of mechanical limiting and electronic detection, ensures both the stability of the handle during storage and achieves accurate state judgment. An alternative solution could be a combination of magnetic positioning pins and Hall effect sensors, or a rubber buffer layer could be applied to the surface of the limiting members 51 to improve shock resistance.

[0046] In one embodiment, the sensing component 6 includes an infrared sensor mounted on the mounting plate 52 with its emitting end facing the receiving slot 5.

[0047] In this embodiment, the infrared sensor is horizontally mounted on the side wall mounting plate 52 of the receiving slot 5, with its transmitter and receiver arranged in a face-to-face configuration. When the crank handle 4 is stored, its shaft completely blocks the infrared beam path, triggering the sensor's light-blocking signal. To ensure detection reliability, the sensor group is equipped with a dual-beam cross-detection mode; the system only determines that the handle is correctly positioned when both beams are simultaneously blocked. A spring-loaded anti-disengagement fastener is added to the top of the receiving slot 5; when the handle is inserted into place, the fastener automatically springs up and locks the handle grip. This solution is particularly suitable for dusty environments, as infrared detection is not affected by metal debris and status recognition can be completed without physical contact. Alternative implementations can use a laser rangefinder sensor to monitor the storage depth of the handle or use an image recognition system for visual verification.

[0048] In one embodiment, the receiving slot 5 is a recessed structure that matches the crank handle 4, and the sensing component 6 is disposed at the bottom of the receiving slot 5.

[0049] Furthermore, the sensing component 6 includes at least one pressing element, which presses the button downward when the crank handle 4 is placed in the receiving slot 5.

[0050] In this embodiment, the accommodating slot 5 is machined into a U-shaped recessed structure, with a miniature limit switch embedded in the bottom of the slot as a pressing component. The end of the crank handle 4 is designed with a tapered head that gradually widens in diameter. When the handle is vertically inserted into the slot, the tapered head presses down on the limit switch contact to a preset travel position. The limit switch employs a dual-contact redundant design, with two independent contacts connected in parallel to the control circuit; the device can be started when either contact is activated. The sidewall of the recessed structure has a guide slope to help the operator quickly align the storage position. A drainage hole is provided at the bottom of the slot to prevent liquid accumulation from affecting the operation of electrical components. This mechanical detection solution is simple and reliable, suitable for environments with high electromagnetic interference. Alternative solutions could use a piezoelectric force sensor to quantify the pressing force, or add an audible prompt module to provide feedback on the storage status.

[0051] In one embodiment, the receiving slot 5 is vertically mounted on the frame 1, and the receiving slot 5 is provided with a hook that matches the crank handle 4, and the sensing component 6 is connected to the hook.

[0052] Furthermore, the hook is movable up and down relative to the receiving slot 5, and the sensing component 6 includes a pressure sensor disposed below the hook.

[0053] In this embodiment, the receiving slot 5 adopts a vertical suspension design with a sliding hook assembly inside. The hook is connected to the frame 1 via a slide rail, and a linear potentiometer is connected to the bottom to form a pressure sensing system. When the crank handle 4 is suspended on the hook, the handle's own weight causes the hook to move downwards and compress the spring. After the pressure sensor detects that the load value reaches a set threshold, it sends an enable signal. A self-locking buckle is provided at the hook opening to ensure that the handle will not fall off due to vibration during equipment operation. This solution achieves status detection through gravity sensing, without relying on precise positioning accuracy, and is particularly suitable for working conditions where the handle is frequently accessed. An alternative implementation can use a weighing sensor to directly measure the weight of the handle, or install an angle encoder at the hook shaft to detect the suspension status.

[0054] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0055] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.

Claims

1. A Micromeguim bowl, characterized in that, It includes a frame (1), a roller (2) placed horizontally on the frame (1), and a drive device (3) connected to the roller (2) to drive the roller (2) to rotate. The end face of the roller (2) is provided with a cover plate (21), which is opened or closed by connecting a detachable crank handle (4). The frame (1) is provided with a receiving slot (5) that matches the shape of the crank handle (4). The receiving slot (5) is provided with a sensing component (6) connected to the drive device (3). The drive device (3) can only be started when the crank handle (4) is placed in the receiving slot (5).

2. The Micromeghurn bowl of claim 1 wherein, The receiving slot (5) includes several upwardly protruding limiting members (51) and at least one mounting plate (52), on which the sensing component (6) is mounted.

3. The Micromeghurn bowl of claim 2 wherein, The sensing component (6) includes a proximity switch mounted on the mounting plate (52) with its sensing end facing the receiving slot (5), and the proximity switch is electrically connected to the driving device (3).

4. The Micromeghurn bowl of claim 3 wherein, The crank handle (4) is provided with a sensing part (41) and a limiting part (42) at both ends. When the crank handle (4) is placed in the receiving slot (5), the sensing part (41) approaches the proximity switch and the limiting part (42) is engaged in the receiving slot (5).

5. The Mikum drum according to claim 4, characterized in that, The receiving slot (5) includes at least four limiting members (51), the limiting members (51) are cylindrical structures, two of the limiting members (51) are disposed on both sides of the limiting part (42), and two of the limiting members (51) are disposed on both sides of the sensing part (41).

6. The Mikum drum according to claim 2, characterized in that, The sensing component (6) includes an infrared sensor mounted on the mounting plate (52) with its transmitting end facing the receiving slot (5).

7. The Mikum drum according to claim 1, characterized in that, The receiving slot (5) is a recessed structure that matches the crank handle (4), and the sensing component (6) is disposed at the bottom of the receiving slot (5).

8. The Mikum drum according to claim 7, characterized in that, The sensing component (6) includes at least one pressing button, which is pressed down by the crank handle (4) when the crank handle (4) is placed in the receiving slot (5).

9. The Mikum drum according to claim 1, characterized in that, The receiving slot (5) is vertically arranged on the frame (1), and the receiving slot (5) is provided with a hook that matches the crank handle (4). The sensing component (6) is connected to the hook.

10. The Mikum drum according to claim 9, characterized in that, The hook is movable up and down relative to the receiving slot (5), and the sensing component (6) includes a pressure sensor disposed below the hook.

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