Coal blockage measuring device for coal dropping pipe at outlet of coal mill

Abstract

The utility model relates to the technical field of coal mill blockage prevention, and discloses a coal mill outlet coal drop pipe coal blockage measuring device, a coal mill coal drop pipe is provided with a measuring assembly, the measuring assembly comprises a mounting seat, a protective shell, a spring, a heavy hammer body, an induction block and a microswitch, the mounting seat is arranged on the inner wall of a coal mill, the protective shell is arranged on the outer wall of the mounting seat, and the spring is arranged on the outer wall of the mounting seat. One end of the spring is arranged at the end, away from the inner wall of the coal mill, of the mounting base, the spring is located in the protective shell, the heavy hammer body is arranged at the end, extending out of the protective shell, of the spring, the microswitch is arranged on the outer wall of the protective shell and is in telecommunication connection with the coal mill, and the induction block is arranged on the outer wall of the spring and located in the protective shell; through the movement of the heavy hammer body, the spring contracts, so that the induction block moves in the protection shell, when the microswitch detects that the induction block displaces, the microswitch transmits an electric signal to the coal mill and closes the coal mill, and the measuring device is low in energy consumption and accurate in measurement.

Description

Technical Field

[0001] This utility model relates to the field of coal mill anti-clogging technology, specifically to a coal mill outlet coal drop pipe clogging measuring device. Background Technology

[0002] During operation, coal lumps may accumulate at the coal drop pipe at the outlet of the coal mill, causing poor coal discharge or even complete blockage. Such blockage can reduce coal milling efficiency, even lead to equipment failure, increase operation and maintenance costs, and affect production efficiency. Therefore, it is necessary to install a measuring device at the coal drop pipe of the coal mill to detect whether the coal drop pipe is blocked.

[0003] Existing coal chute blockage measuring devices typically use rotation to detect blockages caused by loose coal accumulation. The change in rotational damping sends a signal indicating whether a blockage has occurred. However, this method has certain drawbacks: the measuring device is prone to entanglement with debris during rotation, leading to a blockage signal and halting the mill's operation. Furthermore, the device's accuracy is low, resulting in reduced mill production efficiency. Therefore, we propose a coal chute blockage measuring device for the mill outlet to address these issues. Utility Model Content

[0004] The present invention aims to provide a coal blockage measuring device for the coal outlet chute of a coal mill, so as to solve the problem of reduced production efficiency of the coal mill due to low measurement accuracy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coal mill outlet coal chute blockage measuring device, wherein a measuring component is provided at the coal mill outlet coal chute, the measuring component includes a mounting base, a protective shell, a spring, a counterweight, a sensing block, and a micro switch. The mounting base is located on the inner wall of the coal mill, the protective shell is located on the outer wall of the mounting base, one end of the spring is located at the end of the mounting base away from the inner wall of the coal mill, and the spring is located inside the protective shell, the counterweight is located at the end of the spring extending out of the protective shell, the micro switch is located on the outer wall of the protective shell and is electrically connected to the coal mill, and the sensing block is located on the outer wall of the spring, and the sensing block is located inside the protective shell.

[0006] The beneficial effects of this solution are as follows: The measuring device is installed on the upper end of the coal drop pipe of the coal mill via the mounting base. The weight of the counterweight pulls down the spring, causing the spring to move the sensing block inside the protective shell. When the spring force and the weight of the counterweight reach equilibrium, the sensing block remains stationary inside the protective shell. At this time, the counterweight is located at the outlet of the coal mill. When the coal mill starts working and a blockage occurs at the outlet, as the coal mine at the outlet rises, the counterweight moves closer to the protective shell, reducing the spring force. This causes the sensing block to move upward inside the protective shell. During the upward movement of the sensing block, the microswitch detects the displacement of the sensing block, thereby transmitting an electrical signal to the coal mill and shutting it down, thus preventing the coal mill from continuing to work and causing damage to the coal mill.

[0007] Preferably, as an improvement, the inner wall of the protective shell is provided with a limiting ring, the sensing block is located between the mounting base and the limiting ring, the end of the spring away from the mounting base is provided with a steel wire, and one end of the steel wire extends out of the limiting ring and the protective shell, and the counterweight is located at the end of the steel wire away from the limiting ring.

[0008] The beneficial effects are as follows: by setting a limit ring inside the protective shell, the weight body is prevented from being overly stretched by the spring, which would destroy the elasticity of the spring. At the same time, the sensing block is also confined inside the protective shell to prevent the sensing block from being exposed to the external environment. The steel wire is used to extend the distance between the weight body and the coal mill outlet, so that when the coal mill outlet is blocked, the weight body can rise rapidly, thereby triggering the micro switch.

[0009] Preferably, as an improvement, the outer wall of the protective shell at the end away from the mounting base is provided with a collar, the collar is provided with a circular sleeve in the middle, and the steel wire is located inside the circular sleeve.

[0010] The beneficial effects are: the collar is used to install the circular sleeve, the circular sleeve is used to prevent the steel wire from swaying significantly, and it is used to improve the accuracy of the measuring device.

[0011] Preferably, as an improvement, the hammer body has a through-hole with a mounting groove, and the mounting groove is convex in shape. The end of the steel wire away from the limiting ring is provided with a snap-fit ​​block, and the snap-fit ​​block is snapped into the mounting groove.

[0012] The beneficial effects are: the quick connection between the counterweight and the steel wire is achieved by the interlocking of the mounting slot and the snap-fit ​​block, and the installation efficiency is improved by measuring the device.

[0013] Preferably, as an improvement, the outer wall of the protective shell is provided with a slide rail, and the micro switch is slidably located at the upper end of the slide rail.

[0014] The beneficial effect is that by adjusting the position of the micro switch in the slide rail, the trigger stroke of the sensing block can be controlled, making the measuring device more sensitive.

[0015] Preferably, as an improvement, a bearing block is provided at the end of the spring away from the mounting base, and a sensing block is sleeved on the outer wall of the spring, with the sensing block located at the upper end of the bearing block.

[0016] The beneficial effect is that the sensing block is fixed by the bearing block, thereby avoiding fixing the sensing block to the outer wall of the spring and increasing the installation efficiency of the measuring device.

[0017] Preferably, as an improvement, hooks are provided at the end of the mounting base near the protective shell and at the end of the bearing block away from the mounting base, with a spring located on the upper end of the hook on the mounting base and a steel wire located on the upper end of the hook on the bearing block.

[0018] The beneficial effect is that by connecting the springs and steel wires with various hooks, the springs and steel wires can be replaced individually, reducing production costs.

[0019] Preferably, as an improvement, the protective shell is provided with a first sealing ring at one end near the mounting base, and a second sealing ring is provided between the protective shell and the collar.

[0020] The beneficial effect is that the cooperation between the first sealing ring and the second sealing ring keeps the protective shell sealed at the connection, preventing coal ash from entering the protective shell. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the measuring device according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the protective shell according to an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of the weight body in an embodiment of this utility model. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The reference numerals in the accompanying drawings include: mounting base 1, protective shell 2, spring 3, counterweight body 4, sensing block 5, micro switch 6, limit ring 7, steel wire 8, collar 9, circular sleeve 10, mounting groove 11, snap-fit ​​block 12, slide rail 13, bearing block 14, hook 15, first sealing ring 16, and second sealing ring 17.

[0026] Example

[0027] The basic implementation examples are as follows: Figure 1-3 As shown, Figure 1 The device shown is a coal mill outlet coal chute blockage measuring device. The upper end of the coal mill chute is equipped with a measuring component, such as... Figure 2The measuring assembly shown includes a mounting base 1, a protective shell 2, a spring 3, a counterweight 4, a sensing block 5, and a micro switch 6. The mounting base 1 is fixedly installed on the inner wall of the upper end of the coal chute of the coal mill. The outer wall of the mounting base 1 is threaded. The protective shell 2 is threadedly connected to the outer wall of the mounting base 1. The protective shell 2 is a magnetic protective shell 2. A hook 15 is fixedly installed at the lower end of the mounting base 1. The upper end of the spring 3 is fixedly installed on the hook 15. Alternatively, the upper end of the spring 3 can be fixed to the upper end of the hook 15 with a U-bolt. The spring 3 is located inside the protective shell 2. The lower end of the spring 3 is fixed... A bearing block 14 is fixedly installed. A sensing block 5 is sleeved on the outer wall of the spring 3 and is located at the upper end of the bearing block 14. The sensing block 5 is an electromagnetic sensing block 5. A limit ring 7 is fixedly installed on the inner wall of the protective shell 2. The bearing block 14 is located between the mounting base 1 and the limit ring 7. A hook 15 is fixedly installed at the lower end of the bearing block 14. A steel wire 8 is fixedly connected to the hook 15. A collar 9 is threadedly connected to the lower outer wall of the protective shell 2. A circular sleeve 10 is provided in the middle of the collar 9, and the steel wire 8 is located inside the circular sleeve 10. The circular collar 9 is used to prevent the steel wire 8 from swinging too much.

[0028] like Figure 3 The hammer body 4 shown has a mounting groove 11 through the middle, and the mounting groove 11 is convex in shape. The lower end of the steel wire 8 extends into the mounting groove 11. A snap-fit ​​block 12 is fixedly installed at one end of the steel wire 8 that extends into the mounting groove 11, and the snap-fit ​​block 12 is snapped into the inner wall of the mounting groove 11.

[0029] like Figure 2 As shown, a slide rail 13 is fixedly installed on the outer wall of the protective shell 2, and a micro switch 6 is slidably installed on the upper end of the slide rail 13. The micro switch 6 is a magnetic micro switch 6, and the micro switch 6 is electrically connected to the coal mill.

[0030] like Figure 2 As shown, a first sealing ring 16 is provided between the protective shell 2 and the mounting base 1, and a second sealing ring 17 is provided between the protective shell 2 and the collar 9.

[0031] The specific implementation process is as follows:

[0032] The measuring device is installed on the upper end of the coal chute of the coal mill via mounting base 1. The weight of the hammer body 4 pulls the spring 3, causing the bearing block 14 to move the sensing block 5 within the protective shell 2. When the elastic force of the spring 3 is balanced with the weight of the hammer body, the sensing block 5 remains stationary within the protective shell 2. At this time, the hammer body 4 is located at the upper end of the coal chute of the coal mill. When the coal mill starts working and a blockage occurs at the outlet, as the coal in the chute increases, the hammer body 4 moves upward, causing the elastic force of the spring 3 to decrease and contract. This causes the sensing block 5 to move upward within the protective shell 2. During the upward movement of the sensing block 5, the micro switch 6 detects the displacement of the sensing block 5, thereby transmitting an electrical signal to the coal mill and shutting it down, thus preventing the coal mill from continuing to work and causing damage. This measuring device uses the displacement of the hammer body 4 for measurement, which saves energy and provides accurate measurements.

[0033] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A coal mill outlet coal chute blockage measuring device, characterized in that: A measuring component is installed at the coal drop pipe of the coal mill. The measuring component includes a mounting base, a protective shell, a spring, a counterweight, a sensing block, and a micro switch. The mounting base is located on the inner wall of the coal mill, the protective shell is located on the outer wall of the mounting base, one end of the spring is located at the end of the mounting base away from the inner wall of the coal mill, and the spring is located inside the protective shell. The counterweight is located at the end of the spring that extends out of the protective shell. The micro switch is located on the outer wall of the protective shell and is electrically connected to the coal mill. The sensing block is located on the outer wall of the spring and is located inside the protective shell.

2. The coal mill outlet coal chute blockage measuring device according to claim 1, characterized in that: The inner wall of the protective shell is provided with a limiting ring. The sensing block is located between the mounting base and the limiting ring. The end of the spring away from the mounting base is provided with a steel wire, and one end of the steel wire extends out of the limiting ring and the protective shell. The counterweight is located at the end of the steel wire away from the limiting ring.

3. The coal mill outlet coal chute blockage measuring device according to claim 2, characterized in that: The outer wall of the protective shell away from the mounting base is provided with a collar, and a circular sleeve is provided in the middle of the collar, with the steel wire located inside the circular sleeve.

4. The coal mill outlet coal chute blockage measuring device according to claim 3, characterized in that: The hammer body has a through-hole with a mounting groove in the middle, and the mounting groove is convex. The end of the steel wire away from the limit ring is provided with a snap-fit ​​block, and the snap-fit ​​block is snapped into the mounting groove.

5. A coal mill outlet coal chute blockage measuring device according to claim 4, characterized in that: The outer wall of the protective shell is equipped with a slide rail, and the micro switch is slidably located at the upper end of the slide rail.

6. A coal mill outlet coal chute blockage measuring device according to claim 5, characterized in that: A bearing block is provided at the end of the spring away from the mounting base, and a sensing block is sleeved on the outer wall of the spring, with the sensing block located at the upper end of the bearing block.

7. A coal mill outlet coal chute blockage measuring device according to claim 6, characterized in that: Hooks are provided at the end of the mounting base near the protective shell and at the end of the bearing block away from the mounting base. The spring is located at the upper end of the hook on the mounting base, and the steel wire is located at the upper end of the hook on the bearing block.

8. A coal mill outlet coal chute blockage measuring device according to claim 7, characterized in that: The protective shell has a first sealing ring at one end near the mounting base, and a second sealing ring is provided between the protective shell and the collar.

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