Device for predicting wear of roller sleeve of waste concrete sand mill

Abstract

This utility model discloses a device for predicting the wear of roller sleeves in a waste concrete sand vertical mill, comprising a grinding roller, a signal unit, a sensor, and a central control unit. The signal unit is located inside the grinding roller, and the sensor is bidirectionally electrically connected to the signal unit. The central control unit is bidirectionally electrically connected to the sensor. The signal unit includes a heat-insulating glass sleeve, a cable protection sleeve, and a signal cable copper core. The cable protection sleeve is embedded inside the heat-insulating glass sleeve, and the signal cable copper core is embedded inside the cable protection sleeve. The sensor is bidirectionally electrically connected to the signal cable copper core. This device for predicting the wear of roller sleeves in a waste concrete sand vertical mill has a reasonable structural design. By pre-embedding the signal unit inside the roller sleeve, the central control unit can monitor the wear degree of the roller sleeve in a timely manner, avoiding the need for manual entry into the mill to monitor the roller sleeve thickness on-site, and reducing the safety hazards of vertical mill maintenance.

Description

Technical Field

[0001] This utility model relates to the field of vertical mill roller technology, specifically a device for predicting the wear of roller sleeves in a waste concrete sand vertical mill. Background Technology

[0002] The vertical roller mill integrates crushing, drying, grinding, powder classification, and conveying, boasting significant advantages such as high grinding efficiency, large drying capacity, easy adjustment of product fineness, low noise, low power consumption, simple process flow, low wear, and low operating costs. It is highly suitable for large-scale grinding processes, and its main technical and economic indicators have reached international advanced levels. The grinding process of the vertical roller mill is accomplished by a set of grinding devices (i.e., grinding rollers and grinding discs). The material is ground into powder between the grinding rollers and the grinding discs. The movement of the grinding device is driven by the rotation of the grinding disc, which in turn drives the grinding rollers. The grinding pressure, besides the weight of the grinding rollers themselves, is mainly achieved by a hydraulic system pressurizing the material on the grinding discs. The ground material contains a large amount of coarse powder, which is classified by a matching powder classifier. The powder classification process involves airflow separation; during the airflow, most of the coarse powder automatically falls onto the grinding discs for further grinding, while the remainder is separated by the powder classifier into finished product and sent to the finished product storage silo via a dust collection and conveying system.

[0003] Currently, vertical mill roller sleeves lack any wear detection device. To determine the degree of roller sleeve wear, manual inspection of the mill roller access door is required, or the mill may malfunction due to abnormal operation, such as reduced output or vibration-induced shutdown. Central control operators cannot accurately assess the degree of roller sleeve wear by analyzing abnormalities. Furthermore, because waste concrete is a complex multi-component raw material, the wear pattern of roller sleeves differs significantly from that of conventional homogeneous materials. Therefore, we have proposed a predictive device for roller sleeve wear in waste concrete sand powder vertical mills. Utility Model Content

[0004] The purpose of this invention is to provide a device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder, so as to solve the problem mentioned in the background art of not being able to accurately determine the degree of wear of the roller sleeves.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder, comprising a grinding roller, a signal unit, a sensor, and a central control unit. The signal unit is located inside the grinding roller, the sensor is bidirectionally electrically connected to the signal unit, and the central control unit is bidirectionally electrically connected to the sensor. The signal unit includes a heat-insulating glass sleeve, a cable protection sleeve, and a signal cable copper core. The cable protection sleeve is embedded inside the heat-insulating glass sleeve, the signal cable copper core is embedded inside the cable protection sleeve, and the sensor is bidirectionally electrically connected to the signal cable copper core.

[0006] Preferably, the outer side wall of the grinding roller has a reserved hole around its perimeter, and the signal unit is inserted into the reserved hole.

[0007] Preferably, the signal cable has a copper core with a cross-sectional area of ​​0.75 mm², and the signal unit is a double-insulated cable folded at 180 degrees.

[0008] Preferably, the outer side of the grinding roller is provided with a roller sleeve, and the folding point of the signal unit extends into the interior of the roller sleeve.

[0009] Preferably, the heat-insulating glass sleeve is made of fiberglass, and the cable protection sleeve is made of polyethylene.

[0010] Compared with the prior art, the beneficial effects of this utility model are: by pre-embedding a signal unit in the roller sleeve, the central control unit can monitor the wear degree of the roller sleeve in the first time, which can avoid manual entry into the mill to monitor the thickness of the roller sleeve on site, and reduce the safety hazards of vertical mill maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the predictive device for the wear of the roller sleeve of a vertical mill for waste concrete sand powder proposed in this utility model. Figure 2 This is a schematic diagram of the signal unit structure of the predictive device for the wear of the roller sleeve of a vertical mill for waste concrete sand powder proposed in this utility model. Figure 3 This is a schematic diagram of the system structure of the predictive device for the wear of roller sleeves in a vertical mill for waste concrete sand powder proposed in this utility model.

[0012] In the diagram: 100, grinding roller; 110, reserved hole; 120, roller sleeve; 200, signal unit; 210, heat-insulating glass sleeve; 220, cable protection sleeve; 230, copper core of signal cable; 300, sensor; 400, central control unit. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0016] Example: Figures 1-3 As shown, this utility model provides a device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder. It can avoid manual entry into the mill to monitor the roller sleeve thickness on-site, reducing safety hazards during vertical mill maintenance. It includes a grinding roller 100, a signal unit 200, a sensor 300, and a central control unit 400. The signal unit 200 is located inside the grinding roller 100. The sensor 300 is bidirectionally electrically connected to the signal unit 200. The central control unit 400 is bidirectionally electrically connected to the sensor 300. The signal unit 200 includes a heat-insulating glass sleeve 210, a cable protection sleeve 220, and a signal cable copper core 230. The cable protection sleeve 220 is embedded inside the heat-insulating glass sleeve 210, and the signal cable copper core 230 is embedded inside the cable protection sleeve 220. The sensor 300 is bidirectionally electrically connected to the signal cable copper core 230.

[0017] By leading both ends of the copper core 230 of the signal cable out from the surface of the roller sleeve 120 and connecting it to the I / O module of the central control unit 400, the central control unit 400 continuously receives a normally closed signal when the mill is running normally, that is, the system considers the roller sleeve 120 to be unworn. When the roller sleeve 120 of the vertical mill is worn to a certain extent, the sensor 300 detects it and sends a signal to the central control unit 400. The central control unit 400 then issues a roller sleeve 120 wear alarm. At this time, the signal received by the central control unit 400 changes from normally closed to normally open, and the central control system considers the roller sleeve 120 to be worn.

[0018] like Figures 1-3 As shown, a reserved hole 110 is opened around the outer side wall of the grinding roller 100, and the signal unit 200 is inserted into the reserved hole 110.

[0019] like Figures 1-3 As shown, the signal cable copper core 230 is a signal cable with a cross-sectional area of ​​0.75mm², and the signal unit 200 is a double-insulated cable folded at 180 degrees. After the mill has been running for a period of time, the roller sleeve 120 will become thinner due to the continuous grinding of the material.

[0020] like Figures 1-3 As shown, a roller sleeve 120 is provided on the outer side of the grinding roller 100, and the folding point of the signal unit 200 extends into the inside of the roller sleeve 120. When the grinding reaches the folded end of the signal cable copper core 230, the signal cable copper core 230 will be broken. When the sensor 300 senses this, the sensor 300 sends a signal to the central control unit 400.

[0021] like Figures 1-3 As shown, the heat-insulating glass sleeve 210 is made of glass fiber, the cable protection sleeve 220 is made of polyethylene, and the roller sleeve 120 on the grinding roller 100 generates heat when grinding materials. Therefore, the temperature of the roller sleeve 120 will rise during the operation of the mill, and the signal unit 200 needs to be protected by the heat-insulating glass sleeve 210 made of glass fiber.

[0022] In summary, this method avoids the need for manual entry into the mill to monitor the roller sleeve thickness, thus reducing safety hazards during vertical mill maintenance.

[0023] In practical use, when those skilled in the art detect the wear of the roller sleeve 120 of the vertical mill, the two ends of the copper core 230 of the signal cable are led out from the surface of the roller sleeve 120 and connected to the I / O module of the central control unit 400. When the mill is running normally, the central control unit 400 continuously receives a normally closed signal, that is, the system considers the roller sleeve 120 to be unworn. After the mill has been running for a period of time, the roller sleeve 120 will become thinner due to the continuous grinding of the material. When the grinding reaches the folded end of the copper core 230 of the signal cable, the copper core 230 of the signal cable will be worn off. When the sensor 300 detects this, the sensor 300 sends a signal to the central control unit 400. The central control unit 400 then issues a roller sleeve 120 wear alarm. At this time, the signal received by the central control unit 400 changes from normally closed to normally open, and the central control system considers the roller sleeve 120 to be worn.

[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder, characterized in that: The system includes a grinding roller (100), a signal unit (200), a sensor (300), and a central control unit (400). The signal unit (200) is located inside the grinding roller (100). The sensor (300) is bidirectionally electrically connected to the signal unit (200). The central control unit (400) is bidirectionally electrically connected to the sensor (300). The signal unit (200) includes a heat-insulating glass sleeve (210), a cable protection sleeve (220), and a signal cable copper core (230). The cable protection sleeve (220) is embedded inside the heat-insulating glass sleeve (210). The signal cable copper core (230) is embedded inside the cable protection sleeve (220). The sensor (300) is bidirectionally electrically connected to the signal cable copper core (230).

2. The device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder according to claim 1, characterized in that: The outer side wall of the grinding roller (100) has a reserved hole (110) around its perimeter, and the signal unit (200) is inserted into the reserved hole (110).

3. The device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder according to claim 1, characterized in that: The signal cable copper core (230) is a signal cable with a cross-sectional area of ​​0.75 mm², and the signal unit (200) is a double-insulated cable folded at 180 degrees.

4. The device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder according to claim 1, characterized in that: The outer side of the grinding roller (100) is provided with a roller sleeve (120), and the folding point of the signal unit (200) extends into the interior of the roller sleeve (120).

5. The device for predicting the wear of roller sleeves in a vertical mill for waste concrete sand powder according to claim 1, characterized in that: The heat-insulating glass sleeve (210) is made of glass fiber, and the cable protection sleeve (220) is made of polyethylene.

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