Automatic screening device for test mill

Abstract

The utility model discloses an automatic screening device for a test mill, which comprises a screening mechanism arranged at the bottom of a barrel in a housing and used for automatically screening ground cement materials in the barrel; the screening mechanism comprises a screen, a screen shaking lock and a screen shaking connecting chain, the screen is movably mounted under the barrel on the housing, and the screen shaking connecting chain is connected with the screen and a transmission shaft, so that the transmission shaft is driven by a gear motor to rotate, and then the screen shaking connecting chain is driven to perform transmission. By arranging the automatic screening device, the screening process is not influenced by human factors, stable operation can be achieved according to preset parameters and programs, consistency and stability of screening results of each time are guaranteed, establishment of a standardized cement production process and a quality control system is facilitated, and production efficiency is improved. Therefore, the reliability and repeatability of production of the cement test mill are improved, and the stability and consistency of the production process are further improved.

Description

Technical Field

[0001] This utility model relates to the field of cement production technology, specifically to an automatic screening device for a test mill. Background Technology

[0002] The testing mill plays a crucial role in cement plant laboratories, serving as a key piece of equipment for determining the physical properties of cement clinker. It exerts a multifaceted influence on the overall operation of a cement plant: in terms of quality control, it enables the fine grinding of cement raw materials to accurately analyze their composition and characteristics, providing fundamental data for rigorous quality control and ensuring that every batch of cement meets quality standards; in terms of production efficiency, it simulates the actual grinding process in production, facilitating rapid optimization of production formulas and process parameters, significantly reducing the time required for research and development and production process adjustments; from a cost control perspective, precise raw material analysis and process optimization effectively avoid increased costs due to raw material waste, excessive energy consumption, and production errors; and in the area of ​​safety and environmental protection, its excellent sealing and dust collection design significantly reduces dust emissions, creating a relatively healthy and safe working environment for operators, while also meeting environmental protection requirements and reducing potential risks to the company due to environmental issues.

[0003] The existing automatic screening device for test mills (a cement test grinding system with application number 202322224685.5) uses a vibrating screen installed at the discharge port of the small mill's receiving box to screen the ground cement powder. This prevents the test mill's screening system from starting synchronously with the start of the test mill. Furthermore, it requires a separate power unit to provide screening power to the screen, resulting in energy waste. In addition, the screen lacks a screen shaking lock, causing material to fall off the screen prematurely during screening, affecting the automatic screening efficiency and screening quality of the test mill. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an automatic screening device for test mills to solve the technical problems of existing automatic screening devices for test mills, which require an additional power unit to provide screening power to the screen, resulting in energy waste, and the lack of a screen shaking lock on the screen, which causes material to fall off the screen prematurely during the screening process, affecting the automatic screening efficiency and screening quality of the test mill.

[0005] According to the technical solution provided in the embodiments of this application, an automatic screening device for a test mill includes a screening mechanism, which is disposed at the bottom of the cylinder inside the casing, for automatic screening of cement material after grinding inside the cylinder.

[0006] The screening mechanism includes a screen, a screen shaking lock, and a screen shaking connecting chain. The screen is movably mounted on the cylinder directly below the cover. The screen shaking connecting chain connects the screen and a drive shaft, so that the drive shaft rotates under the drive of a reduction motor, thereby driving the screen shaking connecting chain. The power generated during the drive shaft transmission is then transmitted to the screen, causing the screen to shake for screening cement materials. The screen shaking lock is mounted on the cover for locking the screen's discharge.

[0007] Furthermore, a material receiving groove is provided at the bottom of the cover, and a material receiving hopper is movably engaged in the material receiving groove. The material receiving hopper is used for storing and feeding cement materials.

[0008] Furthermore, a felt is installed inside the cover, which is used to seal the gap between the cover, the cylinder and the end cap.

[0009] Furthermore, the cylindrical body is horizontally disposed inside the cover, and corresponding bearing seats are provided at both ends of the outer side of the cover, so that the drive shaft is installed between the two bearing seats.

[0010] Furthermore, one end of the drive shaft is connected to a coupling, the coupling is connected to the geared motor, and the geared motor is fixed on the motor base.

[0011] Furthermore, the cover is provided with a cover door, and the cover door is used for maintenance of the cylinder inside the cover.

[0012] Furthermore, a grinding door cover is provided at the middle of the front end of the cover, and the grinding door cover is used for feeding the grinding material into the cylinder.

[0013] Furthermore, end caps are installed at both ends of the cylinder to seal the cylinder and together with the cylinder, form a relatively sealed grinding space, thereby allowing the material to be fully ground inside the cylinder.

[0014] In summary, the beneficial effects of this application are as follows:

[0015] 1. By installing an automatic screening device inside the casing and a screen shaking connecting chain on the screening mechanism, the screen shaking connecting chain connects the drive shaft and the screen on the test mill, thereby driving the geared motor on the test mill to rotate the drive shaft, which in turn drives the screen shaking connecting chain to generate a uniform and appropriate shaking amplitude and frequency. This ensures that the material can move fully on the screen, be layered, and be screened through the mesh, thus eliminating the need for an additional power source and reducing resource waste.

[0016] Second, by setting a screen shaking lock inside the casing, the screen shaking lock locks the screen during the screening process, preventing the screen from tilting, so that the material can enter the receiving box directly without screening, thereby improving the screening quality of the automatic screening device.

[0017] Third, by setting up an automatic screening device inside the casing, the automatic screening device can continuously and stably perform grinding and screening work, replacing the problems of interruption in manual screening, thereby shortening the screening time and improving the screening efficiency of the automatic screening device. This allows the automatic screening device to continuously screen a large amount of material, thus increasing the advantages of the test mill's automatic screening device.

[0018] IV. By precisely controlling screening parameters such as vibration frequency and amplitude, the automatic screening device can ensure that the cement material is evenly distributed and effectively separated on the screen after grinding, thereby improving the screening accuracy of the automatic screening device, providing more accurate and reliable data for testing, and thus helping to more accurately control the quality of cement products.

[0019] Fifth, by setting up an automatic screening device, the screening process is not affected by human factors and can operate stably according to preset parameters and procedures, ensuring the consistency and stability of each screening result. This helps to establish a standardized cement production process and quality control system, thereby improving the reliability and repeatability of cement test mill production, and thus improving the stability and consistency of the production process.

[0020] VI. The installation of automatic sorting devices reduces the opportunity for manual direct contact with materials and equipment, lowers the risk of mechanical injury and dust pollution to operators during the screening process, and helps to improve the working environment and enhance the safety and environmental friendliness of the production process. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] The following are labeled in the diagram: Cover-1, Cover door-2, Feed hopper-3, Grinding door cover-4, Cylinder-5, Felt-6, End cover-7, Bearing seat-8, Grinding mill base-9, Coupling-10, Gear motor-11, Motor base-12, Screen-13, Screen shaking lock-14, Screen shaking connecting chain-15. Detailed Implementation

[0024] 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 merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0025] 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.

[0026] The structure of the automatic screening device for the test mill is as follows: Figure 1 As shown, the system includes a screening mechanism located at the bottom of the cylinder 5 inside the housing 1. This mechanism is used for automatic screening of the ground cement material within the cylinder 5, thereby improving the screening efficiency and quality of the automatic screening device used in the test mill. The screening mechanism includes a screen 13, a screen shaking lock 14, and a screen shaking connecting chain 15. The screen 13 is movably installed directly below the cylinder 5 on the housing 1, and it is a key component directly responsible for screening the cement material. The mesh size of the screen is designed according to the particle size specifications of the cement material to be screened. The screen 13 is designed to allow material particles that meet the mesh size to pass through and fall through, while larger particles remain on the screen 13. This allows for precise grading and screening of cement materials to meet the specific particle size requirements of subsequent experiments or production processes. The screen shaking connecting chain 15 connects the screen 13 and the drive shaft. As a key link between the screen 13 and the shaking power source, the screen shaking connecting chain stably and efficiently transmits the shaking motion generated by the drive shaft to the screen 13, resulting in uniform and suitable vibration on the screen 13. The vibration amplitude and frequency ensure that the material can move fully on the screen 13, be layered, and pass through the mesh for screening. The screen 13's vibration connection chain possesses high strength and flexibility, capable of withstanding long-term vibration without breakage or damage, and can flexibly adapt to the relative movement and positional changes between the screen 13 and the power source, maintaining the coordinated operation of the entire vibration screening system. The screen vibration lock 14, installed on the housing 1, controls the discharge process of the screen 13. When screening is not complete, the screen vibration lock 14 is locked, effectively preventing material from falling into the collection box prematurely, ensuring that the screen 13 can fully screen and separate the material during vibration. After screening, the screen vibration lock 14 unlocks, providing a channel for the screened material to fall smoothly into the collection box. The screen vibration lock 14 is electrically connected to a controller, allowing the controller to precisely control the unlocking timing, ensuring the accuracy and efficiency of the entire screening process. This improves the reliability and sealing of the screen vibration lock 14, preventing material leakage or jamming during locking and unlocking.

[0027] As a preferred embodiment, please refer to Figure 1The bottom of the cover 1 is provided with a material feeding groove, and a material feeding hopper 3 is movably connected in the material feeding groove. The material feeding hopper 3 is a rectangular box with an upward opening, which is used for storing and feeding grinding cement materials to achieve quantitative supply of materials so that the materials are fed evenly during the grinding process of the test mill.

[0028] As a preferred embodiment, please refer to Figure 1 Inside the casing 1, a felt 6 is also installed. The felt 6 is used to seal the gap between the casing 1, the cylinder 5 and the end cap 7, thereby preventing dust leakage inside the casing 1. At the same time, it provides shock absorption and buffering at the internal connection of the casing 1, reducing wear and vibration between components.

[0029] As a preferred embodiment, please refer to Figure 1 The cylinder 5 is horizontally positioned inside the casing, while corresponding bearing seats 8 are provided at both ends of the outer side of the casing so that the drive shaft is installed between the two bearing seats 8. Each bearing seat 8 is installed on the corresponding mill base 9. The bearing seats 8 support the rotating shaft of the cylinder 5, enabling the cylinder 5 to rotate smoothly. At the same time, they bear the weight of the cylinder 5 and the material, as well as the radial and axial forces generated during the grinding process, ensuring the normal operation of the test mill. They also provide a stable support foundation for the entire test mill, bearing the entire weight of the test mill and evenly transferring it to the ground, preventing the test mill from shaking and shifting during operation.

[0030] As a preferred embodiment, please refer to Figure 1 The left side of the drive shaft is connected to the coupling 10, which in turn is connected to the geared motor 11. The geared motor 11 is fixed on the motor base 12, and the coupling 10 connects the output shaft of the geared motor 11 to the rotating shaft of the test mill, transmitting torque so that the geared motor 11 can drive the cylinder 5 of the test mill to rotate. At the same time, it can also compensate for certain axial offset and angular deviation, ensuring the smoothness of power transmission. The geared motor 11 provides power to the test mill. By reducing the speed of the motor and increasing the output torque, the cylinder 5 of the test mill can rotate at a suitable speed to meet the power requirements for material grinding. The coupling 10 is used to fix the geared motor 11, ensuring the stability of the geared motor 11 during operation and reducing the impact of motor vibration on the overall performance of the test mill.

[0031] As a preferred embodiment, please refer to Figure 1 The casing 1 is equipped with a casing door 2, which allows operators to easily open the casing 1 to perform maintenance, cleaning, material addition, and material removal operations inside the test mill.

[0032] As a preferred embodiment, please refer to Figure 1 A grinding door cover 4 is provided at the middle of the front end of the cover 1. It is used to seal the feed port of the cylinder 5 to prevent the material from overflowing from the feed port during the grinding process and to ensure the normal operation of the grinding process.

[0033] As a preferred embodiment, please refer to Figure 1 End caps 7 are installed at both ends of the cylinder 5 to seal the cylinder 5 and together with the cylinder 5 form a relatively sealed grinding space, so that the material can be fully ground inside the cylinder 5.

[0034] The working principle of the automatic screening device for experimental mills of this utility model is as follows:

[0035] During the automatic grinding and screening of cement clinker by the test mill's automatic screening device, the operator stores the cement clinker to be ground in the hopper 3 at the bottom of the casing 1, then starts the reduction motor 11, causing the coupling 10 installed at the front end of the reduction motor 11 to drive the connected drive shaft to rotate. This drive shaft then drives the grinding rollers inside the cylinder 5 to rotate. The operator opens the mill door 4 and feeds the cement clinker into the cylinder 5 for grinding. The ground cement powder enters the screen 13 at the bottom of the cylinder 5. The screen oscillation connecting chain 15 installed on the screen 13 is connected to the drive shaft, causing the torque output from the drive shaft to oscillate the screen 13, thus oscillating the grinding rollers. The cement powder in the screen 13 is shaken and screened. The qualified cement powder falls into the collection bin inside the casing 1 for collection. Large cement powder particles remaining on the screen 13 are discharged from the casing 1 along the inclined surface of the screen 13 after the screen shaking lock 14 is unlocked. This improves the screening quality and efficiency of the automatic screening device for the cement powder ground by the test mill. The casing 1 is equipped with an automatic screening device, and a screen shaking connecting chain 15 is installed on the screening mechanism. This chain connects the drive shaft on the test mill to the screen 13, thereby driving the geared motor 11 on the test mill to rotate the drive shaft, which in turn causes the screen shaking connecting chain 15 to generate uniform and suitable shaking. The amplitude and frequency ensure that the material can move fully on the screen 13, stratify, and pass through the mesh for screening, thus eliminating the need for a separate power source and reducing resource waste. The automatic screening device ensures continuous and stable grinding and screening, replacing the interruptions of manual screening and shortening screening time, thereby improving the screening efficiency of the automatic screening device. This allows the automatic screening device to continuously screen large quantities of material, enhancing the advantages of the automatic screening device in the test mill. Simultaneously, by precisely controlling screening parameters such as vibration frequency and amplitude, the automatic screening device ensures that the ground cement material is evenly distributed and effectively separated on the screen 13, thereby improving the screening accuracy of the automatic screening device. This provides more accurate and reliable data for testing, thus facilitating more precise control over cement product quality. Furthermore, the automatic screening device ensures that the screening process is unaffected by human factors, operating stably according to preset parameters and procedures. This guarantees the consistency and stability of each screening result, contributing to the establishment of standardized cement production processes and quality control systems. Consequently, the cement test mill improves the reliability and repeatability of production, thereby enhancing the stability and consistency of the production process. Moreover, the automatic screening device reduces opportunities for direct human contact with materials and equipment, lowering the risk of mechanical injury and dust pollution to operators during screening. This improves the working environment and enhances the safety and environmental friendliness of the production process.

[0036] The above description is merely a preferred embodiment of this application and an explanation of the technical principles and solutions employed. Furthermore, the scope of the utility model involved in this application is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive 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. An automatic screening device for a test mill, characterized in that: Includes a screening mechanism, which is located at the bottom of the cylinder (5) inside the casing (1) for automatic screening of the ground cement material inside the cylinder (5); The screening mechanism includes a screen (13), a screen shaking lock (14), and a screen shaking connecting chain (15). The screen (13) is movably installed on the cylinder (5) on the cover (1) directly below it. The screen shaking connecting chain (15) connects the screen (13) and the drive shaft, so that the drive shaft rotates under the drive of the reduction motor (11), thereby driving the screen shaking connecting chain (15) to drive, and thus the power generated during the transmission of the drive shaft is delivered to the screen (13) to make the screen (13) shake, and thus be used for screening cement materials. The screen shaking lock (14) is installed on the cover (1) for locking the discharge of the screen (13).

2. The automatic screening device for testing mills according to claim 1, characterized in that: The bottom of the cover (1) is provided with a material receiving groove, and a material receiving hopper (3) is movably connected in the material receiving groove. The material receiving hopper (3) is used for storing and feeding cement materials.

3. The automatic screening device for testing mills according to claim 1, characterized in that: The cover (1) is also equipped with a felt (6), which is used to seal the gap between the cover (1), the cylinder (5) and the end cap (7).

4. The automatic screening device for testing mills according to claim 1, characterized in that: The cylindrical body (5) is horizontally arranged inside the cover (1), and corresponding bearing seats (8) are provided at both ends of the outer side of the cover (1) so that the transmission shaft is installed between the two bearing seats (8).

5. The automatic screening device for a test mill according to claim 1, characterized in that: One end of the drive shaft is connected to the coupling (10), and the coupling (10) is connected to the geared motor (11), and the geared motor (11) is fixed on the motor base (12).

6. The automatic screening device for testing mills according to claim 1, characterized in that: The cover (1) is provided with a cover door (2), and the cover door (2) is used for the maintenance of the cylinder (5) inside the cover (1).

7. The automatic screening device for testing mills according to claim 1, characterized in that: A grinding door cover (4) is provided at the middle of the front end of the cover (1), and the grinding door cover (4) is used for feeding the grinding material into the cylinder (5).

Images