Lead protection device of bearing of roller disc type coal mill

Abstract

The utility model provides a lead protection device of a bearing of a roller disc type coal mill. The lead protection device is characterized in that connectors are fixed on two sides of a metal tube; the bent pipe is connected to the connector, and a nut is arranged at the tail end of the bent pipe. The spring is wound on the metal tube; and the outer side wall of the spring is coated with a wear-resistant layer. According to the overall structure, the service life is prolonged, and meanwhile the use strength and the limiting protection capacity of the device are improved.

Description

Technical Field

[0001] This application relates to the technical field of lead wire protection devices, specifically to the technical field of a lead wire protection device for a bearing of a roller mill. Background Technology

[0002] The roller mill uses three evenly distributed grinding rollers to apply grinding pressure. The three grinding rollers roll on a uniformly rotating grinding disc. The material to be ground falls from the central coal chute onto the grinding disc. The rotating grinding disc uses centrifugal force to move the material onto the grinding track, where it is ground by the grinding rollers. The hydraulic loading device evenly distributes the grinding force to the three grinding rollers. The grinding pressure is adjusted by the hydraulic loading system according to the amount of coal fed. The pressure of the grinding disc and grinding rollers is transmitted to the foundation through the base plate, tie rods, and hydraulic cylinders. Primary air enters evenly around the grinding disc through nozzle rings, drying the ground material and conveying it to the separator on the mill. In the separator, coarse and fine materials are separated. Fine powder is discharged from the mill, while coarse powder is returned to the grinding disc for further grinding.

[0003] Because the coal mill operates for a long period of time, the grinding roller bearings are not designed with temperature monitoring points, making it impossible to monitor the temperature and operating status of the grinding roller bearings online. Abnormal operating conditions such as lack of oil in the grinding roller bearings cannot be detected in time, often leading to damage to the grinding roller bearings and other related components, forcing the coal mill to be taken out of operation, affecting the normal load-bearing capacity and safe and stable operation of the unit.

[0004] Based on the above discussion, adding temperature measurement points to the grinding roller bearings facilitates online monitoring of the grinding roller bearing temperature and timely detection of abnormal grinding roller operation. Because the grinding rollers vibrate irregularly during the operation of the coal mill, the original coal mill bearing temperature signal line was connected to the temperature element and the outlet through a stainless steel metal flexible hose and led out of the grinding chamber to the DCS system for display on the screen. However, the stainless steel metal flexible hose was damaged due to frequent vibration, causing the temperature measurement points to lose normal monitoring due to signal line breakage. Therefore, a new lead wire protection device is needed. Utility Model Content

[0005] To address the problem in existing technologies where frequent vibrations damage stainless steel flexible metal hoses, leading to broken signal lines at temperature measurement points and loss of normal monitoring.

[0006] This application discloses a lead wire protection device for the bearing of a roller mill, comprising:

[0007] A metal tube, with connectors fixed on both sides;

[0008] A bend, which is connected to the connector, and a nut is provided at the tail end of the bend;

[0009] A spring, the spring being wound around the metal tube; the outer wall of the spring is coated with a wear-resistant layer.

[0010] Furthermore, the bent pipe includes a pipe shell, a plurality of first reinforcing rods and a plurality of second reinforcing rods; all the first reinforcing rods are arranged in a circumferential array on the pipe shell, and a second reinforcing rod is provided through each of the first reinforcing rods.

[0011] Furthermore, the outline of the bend is arc-shaped, and the bends are symmetrically distributed about the central axis of the metal tube.

[0012] Furthermore, each of the first reinforcing rods is arranged radially along the shell.

[0013] Furthermore, the second reinforcing rod also penetrates the tubular shell.

[0014] Furthermore, a limiting plate assembly is fixed on both sides of the metal tube.

[0015] Furthermore, each of the limiting plate assemblies includes a limiting plate, a retaining spring, a connecting plate, and a rubber pad; the rubber pad is located in a fixed position and is connected to the connecting plate; the connecting plate is connected to the limiting plate by a plurality of springs; and the limiting plate abuts against the metal tube.

[0016] Furthermore, all the springs are arranged in a vertical linear array on the rubber pad, or in a rectangular array on the rubber pad.

[0017] Compared with the prior art, the beneficial results of this utility model are as follows:

[0018] The overall structure of this utility model not only improves the service life, but also enhances the strength and limiting protection capabilities of the device.

[0019] This invention replaces the original stainless steel flexible metal tube by using a combination of a metal tube and a metal spring, which greatly improves the vibration resistance and effectively prevents the temperature element from losing monitoring due to wire breakage.

[0020] This invention effectively improves the wear resistance of the lead wire by coating the outer wall of the spring with a wear-resistant layer, the coated surface area being the same as the outer surface area of ​​the metal spring. This allows the lead wire protection device to better adapt to the harsh working environment of the coal mill, reducing lead wire damage caused by wear, extending the service life of the metal spring, reducing replacement frequency, and lowering equipment maintenance costs.

[0021] This invention enhances the radial strength and stability of the tube shell by arranging all the first reinforcing rods in a circumferential array, with a second reinforcing rod penetrating through each of the first reinforcing rods, thus enabling it to better withstand external pressure and impact.

[0022] This utility model installs and fixes the limiting plate on the outer side of both sides of the metal tube, and connects the upper and lower positions of the limiting plate to the retaining spring. The retaining spring is connected to the side of the connecting plate, and the side of the connecting plate is fixed with a rubber pad. Therefore, after the metal spring is wound, the two limiting plates can form a side limit, thereby improving the overall limiting protection capability during operation. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments, taken with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the bent pipe of this utility model.

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the spring of this utility model;

[0027] Figure 4 This is a partial front view of the limiting plate of this utility model.

[0028] In the attached image:

[0029] 1. Metal pipe;

[0030] 2. Spring;

[0031] 3. Connector;

[0032] 4. Nuts;

[0033] 5. Pipe bending;

[0034] 6. Tube shell

[0035] 7. First reinforcing bar;

[0036] 8. Second reinforcing bar;

[0037] 9. Wear-resistant layer;

[0038] 10. Limit plate;

[0039] 11. Snap ring;

[0040] 12. Connecting plate;

[0041] 13. Rubber pad. Detailed Implementation

[0042] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] Figure 1 This application discloses a lead wire protection device for the bearing of a roller mill, comprising:

[0045] Metal tube 1, with connectors 3 fixed on both sides of metal tube 1;

[0046] The bend 5 is connected to the connector 3, and the tail end of the bend 5 is provided with a nut 4.

[0047] Spring 2 is wound around metal tube 1; the outer wall of spring 2 is coated with a wear-resistant layer 9.

[0048] This invention effectively improves the wear resistance of the lead wire by coating the outer wall of the spring 2 with a wear-resistant layer 9, enabling it to better adapt to the harsh working environment of the coal mill and reducing lead wire damage caused by wear. Furthermore, this invention uses a combination of a metal tube 1 and a spring 2, replacing the original stainless steel flexible metal tube, significantly improving vibration resistance and effectively preventing the temperature element from losing monitoring due to vibration-induced wire breakage, thus ensuring the normal operation and safe stability of the coal mill.

[0049] In a preferred embodiment, the surface area of ​​the wear-resistant layer 9 is the same as the outer surface area of ​​the metal spring 2. By uniformly covering the surface with the wear-resistant layer 9, the surface of the metal spring 2 is effectively protected, reducing wear caused by friction and impact, thus making it better suited for the working environment of a coal mill. Furthermore, the service life of the metal spring 2 is significantly extended, reducing replacement frequency and lowering equipment maintenance costs.

[0050] In a preferred embodiment, the bend 5 includes a shell 6, a plurality of first reinforcing rods 7 and a plurality of second reinforcing rods 8; all the first reinforcing rods 7 are arranged in a circumferential array on the shell 6, and a second reinforcing rod 8 is provided through each of the first reinforcing rods 7.

[0051] In a preferred embodiment, each first reinforcing rod 7 is arranged radially along the shell 6. Multiple first reinforcing rods 7 are evenly arrayed along the circumference of the shell 6, and all first reinforcing rods 7 extend radially outward along the shell 6, like spokes of a wheel, tightly connecting the outer wall of the shell 6 to the internal structure, effectively enhancing the radial strength and stability of the shell 6, enabling it to better withstand external pressure and impact.

[0052] In a preferred embodiment, the bend 5 has an arc-shaped profile and is symmetrically distributed about the central axis of the metal pipe 1. The arc-shaped profile allows the bend 5 to distribute stress more evenly when subjected to external forces, avoiding local deformation or damage caused by stress concentration, thereby significantly improving the structural strength and impact resistance of the bend 5.

[0053] In a preferred embodiment, the second reinforcing rod 8 also penetrates the shell 6. Specifically, the second reinforcing rod 8 not only penetrates the first reinforcing rod 7, but also cleverly extends and penetrates the shell 6, thereby organically combining the shell 6, the first reinforcing rod 7, and the second reinforcing rod 8 to form a more stable overall structure.

[0054] In a preferred embodiment, the nut is hexagonal. The six corners of the hexagonal nut provide a wide contact area, allowing force to be evenly distributed between the nut and the bend during tightening. Furthermore, the hexagonal nut is one of the most common nut shapes in industrial applications, perfectly compatible with various standard wrenches and sockets. This allows workers to easily perform tightening or loosening operations using these common tools without relying on special tools or complex operating skills.

[0055] In a preferred embodiment, a limiting plate assembly is fixed on both sides of the metal tube 1, which can significantly improve the reliability of the lead wire protection device. In the harsh operating environment of equipment such as coal mills, the stability of the lead wire protection device directly affects the normal operation of the equipment. The use of the limiting plate assembly ensures that the metal tube 1 remains stable under various operating conditions, thereby guaranteeing the safe and reliable connection of the lead wire and reducing equipment failures caused by loose or damaged lead wires.

[0056] In a preferred embodiment, each limiting plate assembly includes a limiting plate 10, a retaining spring 11, a connecting plate 12, and a rubber pad 13. The rubber pad 13 is positioned in a fixed location and connected to the connecting plate 12. The connecting plate 12 is connected to the limiting plate 10 via multiple retaining springs 11. The limiting plate 10 abuts against the metal tube 1. The main function of the limiting plate 10 is to restrict the movement of the metal tube 1, ensuring that the metal tube 1 maintains a stable position during equipment operation. The limiting plate 10 is typically designed with high strength and rigidity, capable of withstanding significant forces, preventing the metal tube 1 from shifting or shaking due to external forces. The rubber pad 13 is positioned in a fixed location, typically located at the innermost layer where the limiting plate assembly contacts the metal tube 1. The rubber pad 13 is connected to the connecting plate 12, serving as a buffer and protection. The retaining springs 11 provide reliable connection force, ensuring a secure connection between the connecting plate 12 and the limiting plate 10. The retaining springs 11 are designed to ensure the limiting plate assembly remains stable under external forces, preventing loosening due to vibration or impact. The connecting plate 12 serves to connect and transmit force, enabling the snap ring 11 to connect to the rubber pad 13; the rubber pad 13 can absorb vibration and impact, reducing the impact of the metal tube 1's shaking during operation on the limiting plate assembly.

[0057] In a preferred embodiment, the surface of the limiting plate 10 can also be specially treated, such as by adding anti-slip textures, to further improve its limiting effect.

[0058] In a preferred embodiment, all the retaining rings 11 are arranged in a vertical linear array on the rubber pad, or in a rectangular array on the rubber pad. The linear arrangement of the retaining rings 11 ensures a uniform distribution of the connection force between the connecting plate 12 and the limiting plate 10, reducing localized deformation or loosening caused by uneven force. The linear arrangement of the retaining rings 11 simplifies the installation process, allowing workers to quickly position and install the retaining rings 11, improving installation efficiency. During maintenance, the linear arrangement of the retaining rings 11 facilitates inspection and replacement, reducing maintenance time and labor intensity. The rectangular array of retaining rings 11 provides higher connection strength, ensuring a more secure connection between the connecting plate 12 and the limiting plate 10, especially under greater external forces, effectively preventing loosening.

[0059] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described utility model concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A lead wire protection device for the bearing of a roller mill, characterized in that, Metal tube (1), with connectors (3) fixed on both sides of the metal tube (1); A bend (5) is connected to the connector (3), and a nut (4) is provided at the tail end of the bend (5). Spring (2), which is wound around the metal tube (1); the outer wall of the spring (2) is coated with a wear-resistant layer (9).

2. The bearing lead protection device for a roller mill according to claim 1, characterized in that, The bent pipe (5) includes a shell (6), a plurality of first reinforcing rods (7) and a plurality of second reinforcing rods (8); the shell (6) is provided with all the first reinforcing rods (7) in a circumferential array; and a second reinforcing rod (8) is provided through each of the first reinforcing rods (7).

3. The lead wire protection device for the bearing of a roller mill according to claim 1, characterized in that, The outline of the bend (5) is arc-shaped, and the bend (5) is symmetrically distributed about the central axis of the metal pipe (1).

4. The bearing lead protection device for a roller mill according to claim 2, characterized in that, Each of the first reinforcing rods (7) is arranged radially along the shell (6).

5. The lead wire protection device for the bearing of a roller mill according to claim 2, characterized in that, The second reinforcing rod (8) also penetrates the shell (6).

6. The lead wire protection device for the bearing of a roller mill according to claim 1, characterized in that, A limiting plate assembly is fixed on both sides of the metal tube (1).

7. The bearing lead protection device for a roller mill according to claim 6, characterized in that, Each of the limiting plate assemblies includes a limiting plate (10), a retaining ring (11), a connecting plate (12), and a rubber pad (13); the rubber pad (13) is located in a fixed position and is connected to the connecting plate (12); the connecting plate (12) is connected to the limiting plate (10) by a plurality of springs; and the limiting plate (10) abuts against the metal tube (1).

8. The bearing lead protection device for a roller mill according to claim 7, characterized in that, All the springs are arranged in a vertical linear array on the rubber pad (13), or in a rectangular array on the rubber pad (13).

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