Vertical stirring mill lining plate wear limit detection and shaft extension protection device
By using a gas detector and gas container to fill marking gas in a vertical stirring mill, the wear of the lining plate and shaft extension protective cover is detected, and the problem that traditional methods are difficult to detect in harsh environments is solved, and accurate wear is achieved Monitoring and determining replacement time reduces production costs and labor intensity.
Patent Information
- Application Number
- CN202420011896.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-03
AI Technical Summary
The prior art is difficult to directly detect the wear of the lining plate and the shaft extension protective cover in a vertical mixer, the sensor is difficult to operate stably in a harsh environment for a long time, and the calibration method is difficult to effectively detect in a slurry environment.
A gas detector and gas container are used to fill the liner and shaft extension protective cover with marking gas. When the wear reaches its limit, the gas detector issues an acoustic and light alarm and notify the equipment manager to carry out maintenance.
It realizes the optimal replacement time of the lining plate and shaft extension protective cover in a vertical mixing mill, avoids premature or late replacement, and reduces production costs and labor intensity.
Smart Images
Figure CN222353443U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of mining equipment, and further belongs to the technical field of vertical stirring mills, and specifically relates to a vertical stirring mill liner wear limit detection and shaft extension protection device with simple structure and reliable operation. Background Art
[0002] Vertical stirred mill, also known as tower mill or vertical mill, is a fine grinding equipment for granular minerals. Its characteristics are that the axis of the cylinder is in a vertical state, and a spiral agitator is installed in the cylinder, filled with grinding media and minerals to be ground. A liner is installed on the spiral agitator. During the working process, the spiral agitator is buried in the grinding media and the material to stir, and the grinding operation is achieved through the continuous extrusion, shearing and stripping of the grinding media on the material to be ground.
[0003] The liner of the vertical stirred mill is located under the steel balls and slurry, which makes it difficult to check the wear of the liner and shaft extension protection cover without removing these materials. Removing the steel balls and slurry requires stopping the machine, which not only interrupts production, but also requires a lot of manpower and material resources. In actual production, this kind of shutdown inspection is difficult to implement. Therefore, the current practice is to determine when to replace the liner based on the length of use of the liner. However, due to changes in operating conditions and unstable liner quality, the liner may sometimes be replaced too early, increasing production costs, or replaced too late, resulting in damage to the propeller and inability to install a new liner; in addition, the wear of the shaft extension protection cover cannot be judged, which sometimes causes the propeller shaft extension to be worn. The above situation often occurs.
[0004] Currently, the main methods used for wear detection of equipment parts that cannot be directly observed or leak detection of pipelines and containers are the calibration method and the sensor detection method. We can add specific markers to equipment parts, such as solid particles, pigments, fluorescent substances or radioactive substances. When these parts are worn to a certain extent, the markers will be released. We can judge whether the parts have been worn to the limit by observing whether these markers appear, whether the color changes, or whether radioactivity is detected. The sensor detection method is to monitor the wear of the parts by installing sensors on them. These sensors can convert wear information into electrical signals. After analysis and processing, we can know the specific degree of wear of the parts.
[0005] The above two solutions are widely used in the industry, but for vertical stirred mills, these two solutions are difficult to implement. On the one hand, the slurry flow rate of the vertical stirred mill is large and the color is black. The released calibration material will soon be diluted and mixed into other equipment with the circulation of the slurry. It is difficult for us to observe the release of the calibration material in time and determine which equipment it comes from. On the other hand, the liner and shaft extension protection cover of the vertical stirred mill are located under the steel ball and slurry, and the working environment is also extremely harsh. Unfavorable factors such as high temperature, severe impact and vibration, and slurry flooding make it difficult for the sensor to work stably for a long time; in addition, the signal detected by the sensor is difficult to be transmitted through the steel ball and slurry; if the reserved line is not considered during the design, it is also very difficult to add a wire to the vertical stirred mill to transmit the signal. For this reason, the research and development of a simple structure, reliable operation, vertical stirred mill liner wear limit detection and shaft extension protection device is the key to solving this problem. Utility Model Content
[0006] The utility model aims to provide a vertical stirring mill liner wear limit detection and shaft extension protection device with simple structure and reliable operation.
[0007] The purpose of the utility model is achieved in this way, including a gas detector, a gas container I, a charging valve, a positioning pin, a marking gas, a wear detection liner, a shaft extension protection cover, a bottom plate, and a gas container II, wherein the gas detector is arranged on the upper end cover of the vertical stirred mill cylinder; the wear detection liner is installed at the bottom of the spiral wing; the gas container I is arranged in the arc groove of the wear detection liner; the gas container I is respectively provided with a charging valve and a positioning pin; the positioning pin cooperates with the positioning pin hole provided on the wear detection liner; the gas container I is filled with marking gas; the shaft extension protection cover is arranged at the lower end of the spiral shaft; the gas container II is arranged in the bottom of the shaft extension protection cover; the gas container II is located on the lower end surface of the spiral shaft; the charging valve is arranged on the gas container II; the gas container II is filled with marking gas; the bottom plate is arranged on the lower end surface of the shaft extension protection cover; the stud of the bottom plate passes through the shaft extension protection cover and the gas container II in sequence and is connected to the end of the spiral shaft.
[0008] The utility model is composed of a gas detector, a gas container I, an inflation valve, a positioning pin, a marking gas, a wear detection liner, a shaft protection cover, a bottom plate, and a gas container II; a gas detector is installed on the upper end cover of the vertical stirred mill cylinder to pre-determine the calibration gas content under the normal working state of the equipment when the marking gas is not released, and set the alarm threshold of the gas detector. A gas container I is installed in the lower arc groove of the wear detection liner, and the gas container I is filled with the marking gas; a gas container II is installed in the bottom of the shaft protection cover, and the gas container II is filled with the marking gas. When the gas container I or the gas container II is worn through, the marking gas is released and forms bubbles that quickly rise above the liquid level, so that it is detected by the gas detector. After detecting the marking gas, the gas detector sends out an audible and visual alarm, and feeds back the signal to the centralized control system to remind the equipment management personnel. Since gas container I is installed at the wear limit position of the wear detection liner, and gas container II is installed at the bottom of the shaft protection cover, when gas container I or gas container II is worn through, the marked gas is released, indicating that the wear detection liner or shaft protection cover has reached the limit position, and the wear of the wear detection liner is basically the same as that of other general liners. This is the best time to replace it. Since the released gas rises quickly, it will not flow with the mineral process after rising to the liquid surface, but can stay in the space above the liquid surface for a long time, and will quickly dissipate after entering the atmosphere, so it is easy to be detected and will not cause pollution to other equipment.
[0009] The utility model can accurately judge the best maintenance time of the liner plate and the shaft extension protection cover, and the situation of over-late or over-early maintenance of the liner plate and the shaft extension protection cover will not occur, thus avoiding damage to the equipment, reducing production costs and alleviating the labor intensity of employees.
[0010] The utility model has the advantages of simple structure and reliable operation, and can detect the wear limit of the lining plate of the vertical stirring mill and the wear of the shaft extension protection cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0012] Figure 2 for Figure 1 The enlarged cross-sectional view of the K part;
[0013] Figure 3 It is a schematic diagram of the gas container I and related parts of the utility model;
[0014] Figure 4 for Figure 3 AA cross-sectional view;
[0015] Figure 5 This is a schematic diagram of the wear detection lining of the utility model;
[0016] Figure 6 for Figure 5 BB cross-sectional view;
[0017] Figure 7 for Figure 1 The L section is an enlarged schematic diagram;
[0018] Figure 8 This is a schematic diagram of the gas container II and related parts of the utility model.
[0019] In the figure: 1-gas detector, 2-gas container I, 3-charging valve, 4-locating pin, 5-marking gas, 6-wear detection liner, 601-wear detection liner body, 602-arc groove, 603-locating pin hole, 7-axle extension protection cover, 8-bottom plate, 9-gas container II, 10-screw shaft, 11-grinding medium, 12-mineral, 13-spiral wing, 14-universal liner, 15-liquid, 16-motor, 17-reducer, 18-cylinder, 19-feeding pipe. DETAILED DESCRIPTION
[0020] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes made based on the teachings of the present invention fall within the protection scope of the present invention.
[0021] like Figures 1 to 8 As shown, the utility model includes a gas detector 1, a gas container Ⅰ2, an air charging valve 3, a positioning pin 4, a marking gas 5, a wear detection liner 6, a shaft extension protection cover 7, a bottom plate 8, and a gas container Ⅱ9. The gas detector 1 is arranged on the upper end cover of the vertical stirring mill cylinder 18; the wear detection liner 6 is installed at the bottom of the spiral wing 13; the gas container Ⅰ2 is arranged in the arc groove of the wear detection liner 6; the air charging valve 3 and the positioning pin 4 are respectively arranged on the gas container Ⅰ2; the positioning pin 4 and the positioning pins arranged on the wear detection liner 6 The pin hole matches the position; the gas container Ⅰ2 is filled with marking gas 5; the shaft extension protection cover 7 is arranged at the lower end of the screw shaft 10; a gas container Ⅱ9 is arranged in the bottom of the shaft extension protection cover 7; the gas container Ⅱ9 is located on the lower end surface of the screw shaft 10; the gas container Ⅱ9 is provided with a charging valve 3; the gas container Ⅱ9 is filled with marking gas 5; the bottom plate 8 is arranged on the lower end surface of the shaft extension protection cover 7; the studs of the bottom plate 8 pass through the shaft extension protection cover 7 and the gas container Ⅱ9 in turn and are connected to the end of the screw shaft 10.
[0022] The gas container Ⅰ2 is in an arc shape.
[0023] The gas container Ⅰ2 is formed by welding steel plates.
[0024] The marking gas 5 is in a compressed gas state or a compressed liquefied liquid.
[0025] The marking gas 5 is non-toxic, harmless, insoluble in water, and will not chemically react with water or filling materials.
[0026] The marker gas 5 does not exist in the air or its content is extremely low.
[0027] The wear detection liner 6 comprises a wear detection liner body 601 , an arc-shaped groove 602 , and positioning pin holes 603 ; the wear detection liner body 601 is provided with an arc-shaped groove 602 ; and two rows of positioning pin holes 603 are provided at the arc-shaped groove 602 .
[0028] The diameter of the positioning pin hole 603 is adapted to the positioning pin 4 .
[0029] The gas container II9 is in the shape of a ring.
[0030] The gas container II9 is formed by welding steel plates.
[0031] The working principle and working process of this utility model:
[0032] The utility model installs a gas detector 1 on the upper end cover of the vertical stirred mill barrel 18, pre-determines the content of the calibration gas 5 under the normal working state of the equipment when the marker gas 5 is not released, and sets the alarm threshold of the gas detector 1. A gas container Ⅰ2 is installed in the lower arc groove 602 of the wear detection liner 6, and the gas container Ⅰ2 is filled with the marker gas 5; a gas container Ⅱ9 is installed in the bottom of the shaft extension protection cover 7, and the gas container Ⅱ9 is filled with the marker gas 5. When the gas container Ⅰ2 or the gas container Ⅱ9 is worn through, the marker gas 5 is released and forms bubbles that quickly rise above the liquid level, so that it is detected by the gas detector 1. After the gas detector 1 detects the marker gas 5, it sends out an audible and visual alarm, and feeds back the signal to the centralized control system to remind the equipment management personnel. Since the gas container I2 is installed at the wear limit position of the wear detection liner 6, and the gas container II9 is installed at the bottom position of the shaft extension protection cover 7, when the gas container I2 or the gas container II9 is worn through, the marking gas 5 is released, indicating that the wear detection liner 6 or the shaft extension protection cover 7 has been worn to the limit position, and the wear of the wear detection liner 6 is basically the same as that of other general liners 14. This is the best time to replace it. Since the released gas rises quickly, it will not flow with the mineral process after rising to the liquid surface, but can stay in the space above the liquid surface for a long time, and will quickly dissipate after entering the atmosphere, so it is easy to be detected and will not cause pollution to other equipment.
Claims
1. A vertical stirred mill liner wear limit detection and shaft extension protection device, comprising a gas detector (1), a gas container I (2), a charging valve (3), a positioning pin (4), a marking gas (5), a wear detection liner (6), a shaft extension protection cover (7), a bottom plate (8), and a gas container II (9), wherein: The gas detector (1) is arranged on the upper end cover of the vertical stirring mill barrel (18); the wear detection liner (6) is installed on the bottom of the spiral wing (13); a gas container I (2) is arranged in the arc-shaped groove of the wear detection liner (6); an air filling valve (3) and a positioning pin (4) are respectively arranged on the gas container I (2); the positioning pin (4) is matched with the positioning pin hole arranged on the wear detection liner (6); the gas container I (2) is filled with a marking gas (5); the shaft extension protection cover (7) The invention relates to a screw shaft (10) and a gas container (9) arranged at the lower end of the screw shaft (10); a gas container (9) is arranged in the bottom of the shaft protection cover (7); the gas container (9) is located on the lower end surface of the screw shaft (10); a gas charging valve (3) is arranged on the gas container (9); the gas container (9) is filled with a marking gas (5); a bottom plate (8) is arranged on the lower end surface of the shaft protection cover (7); the studs of the bottom plate (8) pass through the shaft protection cover (7) and the gas container (9) in sequence and are connected to the end of the screw shaft (10).
2. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized in that: The gas container Ⅰ (2) is arc-shaped.
3. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized in that: The gas container I (2) is made of welded steel plates.
4. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized in that: The marking gas (5) is in a compressed gaseous state or a compressed liquefied liquid.
5. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized in that: The marking gas (5) is non-toxic and harmless, insoluble in water, and will not chemically react with water or filling materials.
6. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized by: The marker gas (5) does not exist in the air or its content is extremely low.
7. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized by: The wear detection liner (6) comprises a wear detection liner body (601), an arc-shaped groove (602), and positioning pin holes (603); the wear detection liner body (601) is provided with an arc-shaped groove (602); and two rows of positioning pin holes (603) are provided at the arc-shaped groove (602).
8. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 or 7, characterized in that: The diameter of the positioning pin hole (603) is adapted to the positioning pin (4).
9. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1 is characterized by: The gas container II (9) is in the shape of a ring.
10. The vertical stirred mill liner wear limit detection and shaft extension protection device according to claim 1, characterized in that: The gas container II (9) is made of welded steel plates.