A vertical mill air supply device for cement production

Abstract

The utility model discloses a vertical mill air supply device for cement production, including base and casing, the casing is located on the base, and the inside of casing is sequentially provided with power platform, mill disc, mill roll and powder selecting fan from below to above, be provided with the air duct ring on power platform, and the air duct ring side surface is sequentially provided with a plurality of air inlets extending to the outside of casing along its circumferential direction, mill disc rotatory mounting is established on power platform, and the concentricity with air duct ring is not contacted and is established, and mill roll rotatory abuts on mill disc, be provided with the wind pump connecting pipe of the air pump connecting pipe on the casing is located above powder selecting fan, and be provided with air volume sensor on the wind pump connecting pipe, the position of corresponding each air inlet on base is set up one to one with the card station, and the air inlet connecting pipe is movably inserted on the card station, and the outer side of card station rotatory mounting has the movable ring, and the one end of air inlet connecting pipe is connected on corresponding air inlet, and the other end is abutted on the inside of movable ring, and the through hole that is matched with air inlet connecting pipe is set up on movable ring.

Description

Technical Field

[0001] This utility model relates to the technical field of cement production equipment, specifically to an air supply device for a vertical mill used in cement production. Background Technology

[0002] Vertical roller mills are essential equipment in cement production, primarily used to grind lumpy materials such as limestone, clay, iron ore, and coal into fine powder. During the grinding process, the material is subjected to compression, grinding, and shearing forces between the grinding disc and rollers, gradually becoming pulverized. Their high-efficiency grinding capacity significantly improves cement production efficiency, having a crucial impact on the quality and output of cement products and the economic benefits of enterprises.

[0003] In the prior art, utility model patent CN201520952462.3 discloses a cement vertical mill, characterized by comprising a vertical mill body, a classifying chamber, a grinding disc, grinding rollers, a motor, and a geared motor. The classifying chamber is located at the upper part of the vertical mill body, the grinding disc is located at the lower part of the vertical mill body, the grinding rollers are located on the outer surface of the grinding disc, the motor is connected to the geared motor and located at the bottom of the vertical mill body, the grinding disc is connected to the geared motor through a transmission device, a fine powder outlet is provided at the top of the vertical mill body, and a raw material inlet and a hot gas inlet are provided at the bottom of the vertical mill body. This cement vertical mill has the characteristics of reasonable structural design, simple and convenient operation, low manufacturing and maintenance costs, high production efficiency, energy saving and environmental protection, strong material drying capacity, and stable product quality.

[0004] The aforementioned patent provides a vertical mill for cement production. This device has a simple structure, compact layout, and occupies only 50% of the area of ​​a ball mill system. It can also be installed outdoors, greatly improving the efficiency of cement production. However, in the existing cement vertical mill, the air supply is provided by an air pump. When the voltage is unstable, the air volume provided by the air pump is unstable, which can easily cause changes in parameters such as the airflow velocity and flow rate in the vertical mill. As a result, the powder particles produced by the vertical mill are of different sizes, affecting the quality of the product, and further improvements are needed. Utility Model Content

[0005] The purpose of this utility model is to provide an air supply device for a vertical mill in cement production, which aims to improve the problem that when the voltage is unstable, the air volume provided by the air pump is unstable, which easily leads to changes in parameters such as airflow velocity and flow rate in the vertical mill, resulting in inconsistent particle size of the powder produced by the vertical mill and affecting the quality of the product.

[0006] This utility model is implemented as follows: A vertical mill air supply device for cement production includes a base and a housing. The housing is mounted on the base, and inside the housing, from bottom to top, a power platform, a grinding disc, a grinding roller, and a classifying fan are arranged sequentially. An air duct ring is provided on the power platform, and multiple air inlets extending to the outside of the housing are arranged sequentially along the circumference of the air duct ring. The grinding disc is rotatably mounted on the power platform, concentric with the air duct ring but not in contact with it, and the grinding roller rotates and abuts against the grinding disc. A pump connecting pipe is provided on the housing above the classifying fan, and an air volume sensor is provided on the pump connecting pipe. A clamping platform is provided on the base corresponding to the position of each air inlet, and an air outlet connecting pipe is movably inserted into the clamping platform. A movable ring is rotatably mounted on the outer side of the clamping platform. One end of the air outlet connecting pipe is connected to the corresponding air inlet, and the other end abuts against the inner side of the movable ring. The movable ring is provided with a through hole adapted to the air outlet connecting pipe.

[0007] Preferably, the base further includes an electric telescopic rod; one end of the electric telescopic rod is rotatably mounted on the side of the card platform, and the other end is rotatably connected to the bottom end of the movable ring; the movable ring is rotatably set by the electric telescopic rod.

[0008] Preferably, the upper end of the card platform is provided with a card plate, which is snapped onto the upper end of the movable ring; the card plate is provided with mounting bolts, and the card plate is detachably mounted on the card platform by means of the mounting bolts.

[0009] Preferably, the housing consists of a first housing, a second housing, and a third housing connected sequentially from bottom to top; the power platform, grinding disc, and grinding roller are disposed in the first housing; a feed pipe is disposed on the second housing, with one end extending to the outside of the second housing and the other end extending above the grinding disc; a classifying fan is mounted on the third housing, and the air pump connecting pipe is obliquely disposed on the third housing and located above the classifying fan.

[0010] Preferably, the power platform is a hollow structure with an opening at the bottom, and a first motor is installed inside the power platform. The output shaft of the first motor passes through the upper end of the power platform and connects to the lower end face of the grinding disc.

[0011] Preferably, the grinding roller includes a mounting rod and a hydraulic telescopic column. Multiple mounting columns are sequentially arranged along the circumference of the side of the power table. The rod body is rotatably mounted on the upper end of the mounting column. A roller body is rotatably mounted on one end of the mounting rod near the grinding disc, and the other end is raised and lowered via the hydraulic telescopic column. The side of the first housing is provided with a matching side cavity corresponding to the position of each hydraulic telescopic column, and a cavity cover is detachably provided on the side cavity.

[0012] Preferably, the powder classifying fan includes fan blades, and a plurality of fan blades are arranged sequentially along its circumference on the outer side of the powder classifying fan. An installation shaft is fixedly arranged at the center of the powder classifying fan. The installation shaft is rotatably installed on the upper end of the third housing and extends through the third housing to the outside, where a second motor is provided.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses an air volume sensor to monitor the air volume in the equipment in real time. When the air volume changes, the movable ring is rotated by an electric telescopic rod. The through holes on the movable ring are misaligned with the rotation of the movable ring, which changes the air intake of the air outlet connecting pipe. Thus, the air intake can be adjusted in a timely manner according to the changes in airflow in the equipment to ensure the stability of the air volume in the equipment.

[0015] 2. This utility model uses a hydraulic telescopic column to drive the mounting rod to rotate, thereby adjusting the contact pressure of the roller on the grinding disc, and lifting the roller off the grinding disc when maintaining the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the base of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the base of this utility model;

[0020] Figure 5 This is a cross-sectional structural diagram of the first housing and its internal assembly of the present invention;

[0021] Figure 6 This is a three-dimensional structural diagram of the assembly of the power table, grinding disc and grinding roller of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the assembly of the third housing and the powder selection fan of this utility model.

[0023] In the diagram: 1. Base; 101. Mounting platform; 102. Air outlet connecting pipe; 103. Movable ring; 104. Through hole; 105. Electric telescopic rod; 106. Mounting plate; 107. Mounting bolt; 2. First housing; 201. Side cavity; 202. Cavity cover; 3. Second housing; 301. Feed pipe; 4. Third housing; 401. Air pump connecting pipe; 5. Power platform; 501. Mounting column; 6. Grinding disc; 601. First motor; 7. Air duct ring; 701. Air inlet; 8. Grinding roller; 801. Mounting rod; 802. Hydraulic telescopic column; 803. Roller body; 9. Powder classifier fan; 901. Fan blade; 902. Mounting shaft; 903. Second motor; 10. Air volume sensor. Detailed implementation method:

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a vertical mill air supply device for cement production includes a base 1 and a housing. The housing is mounted on the base 1, and a first housing 2, a second housing 3, and a third housing 4 are sequentially connected from bottom to top within the housing. By dividing the housing into multiple structures, it is not only convenient to manufacture but also convenient for installation workers to assemble. Inside the housing, from bottom to top, a power platform 5, a grinding disc 6, a grinding roller 8, and a classifying fan 9 are sequentially arranged. An air duct ring 7 is provided on the power platform 5, and multiple air inlets 701 extending to the outside of the housing are sequentially arranged along the circumference of the air duct ring 7. The grinding disc 6 is rotatably mounted on the power platform 5, concentric with the air duct ring 7 but not in contact with it. The grinding roller 8 rotates and abuts against the grinding disc 6. The air duct ring 7 and the grinding disc 6 are concentric and have a gap between them, allowing airflow to enter through the air inlets 701. The gap between the air duct ring 7 and the grinding disc 6 generates an upward airflow, which can lift the ground powder on the grinding disc 6.

[0028] like Figure 2 , Figure 5 and Figure 6As shown, the power platform 5, grinding disc 6, and grinding roller 8 are arranged in the first housing 2. The power platform 5 is a hollow structure with an open bottom. A first motor 601 is installed inside the power platform 5, and the output shaft of the first motor 601 passes through the upper end of the power platform 5 and connects to the lower end face of the grinding disc 6. The grinding roller 8 includes a mounting rod 801 and a hydraulic telescopic column 802. Multiple mounting columns 501 are arranged sequentially along the circumference of the side of the power platform 5. The rod body of the mounting rod 801 is rotatably mounted on the upper end of the mounting column 501. A roller body 803 is rotatably installed at one end of the mounting rod 801 near the grinding disc 6, and the other end is raised and lowered by the hydraulic telescopic column 802. The side of the first housing 2 is provided with a corresponding side cavity 201 corresponding to the position of each hydraulic telescopic column 802. A cavity cover 202 is detachably installed on the side cavity 201. A feed pipe 301 is provided on the second housing 3. One end of the feed pipe 301 extends to the outside of the second housing 3, and the other end extends above the grinding disc 6. The grinding disc 6 is driven to rotate on the power platform 5 by the first motor 601. The mounting rod 801 is driven to rotate by the hydraulic telescopic column 802. The roller 803 can abut against or move away from the upper end surface of the grinding disc 6 as the mounting rod rotates. Not only can the abutting force of the roller 803 on the grinding disc 6 be adjusted by controlling the hydraulic telescopic column 802, but the roller 803 can also be lifted easily during later maintenance of the equipment.

[0029] like Figure 2 and Figure 7 As shown, a pump connection pipe 401 is installed on the housing above the powder classifier fan 9. The pump connection pipe 401 is used to connect to an external pump. The external pump can generate air pressure inside the housing, and the external airflow flows upward inside the housing through the air inlet 701, thereby generating an upward airflow inside the housing, which can move the crushed powder upward. An airflow sensor 10 is installed on the pump connection pipe 401. The airflow sensor 10 can detect the airflow intensity inside the housing. The airflow sensor 10 is also electrically connected to the pump through an external processor device, so that the airflow of the pump can be changed according to the actual situation to achieve the screening of powders of different particle sizes. The powder classifier fan 9 is installed on the third housing 4, and the pump connection pipe 401 is inclinedly installed on the third housing 4 and located above the powder classifier fan 9. The classifying fan 9 includes fan blades 901. Several fan blades 901 are arranged sequentially along the circumference of the outer side of the classifying fan 9. A mounting shaft 902 is fixedly installed at the center of the classifying fan 9. The mounting shaft 902 is rotatably mounted on the upper end of the third housing 4 and extends through the third housing 4 to the outside, where a second motor 903 is installed. By setting up the classifying fan 9, large floating particles can be impacted and fell onto the grinding disc 6 by the rotating fan blades 901 for further grinding, preventing large particles from being discharged.

[0030] like Figures 1-4As shown, each air inlet 701 on the base 1 is equipped with a mounting bracket 101 corresponding to its respective position. An air outlet connecting pipe 102 is movably inserted into the mounting bracket 101. A movable ring 103 is rotatably mounted on the outer side of the mounting bracket 101. A mounting plate 106 is provided at the upper end of the mounting bracket 101, and the mounting plate 106 is snapped into the upper end of the movable ring 103. Mounting bolts 107 are provided on the mounting plate 106, allowing it to be detachably mounted on the mounting bracket 101. One end of the air outlet connecting pipe 102 is connected to the corresponding air inlet 701, and the other end abuts against the inner side of the movable ring 103. The movable ring 103 has a through hole 104 that matches the air outlet connecting pipe 102. The base 1 also includes an electric telescopic rod 105; one end of the electric telescopic rod 105 is rotatably mounted on the side of the mounting bracket 101, and the other end is rotatably connected to the bottom end of the movable ring 103; the movable ring 103 is rotatably mounted via the electric telescopic rod 105. By setting up the movable ring 103 and the air outlet connecting pipe 102, one end of the air outlet connecting pipe 102 can be connected to the air inlet 701, and the other end can be abutted against the inner side of the movable ring 103. By rotating the movable ring 103 with the electric telescopic rod 105, the through hole 104 on the movable ring 103 and the air outlet connecting pipe 102 can be misaligned, thereby changing the air intake of the air outlet connecting pipe 102 and thus controlling the air volume inside the housing. At the same time, the electric telescopic rod 105 is also electrically connected to the external processor device. It can transmit electrical signals to the external processor device through the air volume sensor 10. After processing by the external processor device, it transmits electrical signals to the electric telescopic rod 105 to control the extension and retraction of the electric telescopic rod 105 and adjust the air intake of the air outlet connecting pipe 102. This allows the air volume adjustment range of the device to be not limited by the air pump. For example, when using a high-volume air pump, the lower limit of the air volume range of the device can be expanded to the minimum by adjusting the air intake of the air outlet connecting pipe 102.

[0031] Example 2

[0032] like Figure 1 and Figure 2 As shown, a vertical mill air supply device for cement production includes a base 1 and a housing. The housing is mounted on the base 1, and a first housing 2, a second housing 3, and a third housing 4 are sequentially connected from bottom to top on the housing. Inside the housing, a power platform 5, a grinding disc 6, a grinding roller 8, and a classifying fan 9 are sequentially arranged from bottom to top. An air duct ring 7 is provided on the power platform 5, and multiple air inlets 701 extending to the outside of the housing are sequentially arranged on the side of the air duct ring 7 along its circumference. The grinding disc 6 is rotatably mounted on the power platform 5, concentric with the air duct ring 7 but not in contact with it, and the grinding roller 8 rotates and abuts against the grinding disc 6.

[0033] like Figure 2 , Figure 5 and Figure 6As shown, the power platform 5, grinding disc 6, and grinding roller 8 are arranged in the first housing 2. The power platform 5 is a hollow structure with an open bottom. A first motor 601 is installed inside the power platform 5, and the output shaft of the first motor 601 passes through the upper end of the power platform 5 and connects to the lower end face of the grinding disc 6. The grinding roller 8 includes a mounting rod 801 and a hydraulic telescopic column 802. Multiple mounting columns 501 are arranged sequentially along the circumference of the side of the power platform 5. The rod body of the mounting rod 801 is rotatably mounted on the upper end of the mounting column 501. A roller body 803 is rotatably installed at one end of the mounting rod 801 near the grinding disc 6, and the other end is raised and lowered by the hydraulic telescopic column 802. The side of the first housing 2 is provided with a corresponding side cavity 201 corresponding to the position of each hydraulic telescopic column 802. A cavity cover 202 is detachably installed on the side cavity 201. A feed pipe 301 is provided on the second housing 3. One end of the feed pipe 301 extends to the outside of the second housing 3, and the other end extends above the grinding disc 6.

[0034] like Figure 2 and Figure 7 As shown, a pump connection pipe 401 is provided on the housing above the powder classifier fan 9, and an airflow sensor 10 is provided on the pump connection pipe 401; the powder classifier fan 9 is installed on the third housing 4, and the pump connection pipe 401 is inclinedly arranged on the third housing 4 and located above the powder classifier fan 9. The powder classifier fan 9 includes fan blades 901, and a plurality of fan blades 901 are arranged sequentially along its circumference on the outer side of the powder classifier fan 9. A mounting shaft 902 is fixedly provided at the center of the powder classifier fan 9, and the mounting shaft 902 is rotatably mounted on the upper end of the third housing 4, and extends through the third housing 4 to the outside where a second motor 903 is provided.

[0035] like Figures 1-4 As shown, each air inlet 701 on the base 1 is equipped with a mounting bracket 101 corresponding to its respective position. An air outlet connecting pipe 102 is movably inserted into the mounting bracket 101. A movable ring 103 is rotatably mounted on the outer side of the mounting bracket 101. A mounting plate 106 is provided at the upper end of the mounting bracket 101, and the mounting plate 106 is snapped into the upper end of the movable ring 103. Mounting bolts 107 are provided on the mounting plate 106, allowing it to be detachably mounted on the mounting bracket 101. One end of the air outlet connecting pipe 102 is connected to the corresponding air inlet 701, and the other end abuts against the inner side of the movable ring 103. The movable ring 103 has a through hole 104 that matches the air outlet connecting pipe 102. The base 1 also includes an electric telescopic rod 105; one end of the electric telescopic rod 105 is rotatably mounted on the side of the mounting bracket 101, and the other end is rotatably connected to the bottom end of the movable ring 103; the movable ring 103 is rotatably mounted via the electric telescopic rod 105.

[0036] The working principle of this utility model is as follows: During use, the material to be crushed is fed onto the grinding disc 6 through the feed inlet. As the grinding disc 6 rotates, the material to be crushed is driven to pass through the grinding roller 8 for crushing. Then, an external air pump device connected through the air pump connection pipe 401 draws air, creating a negative pressure inside the housing. This allows upward airflow to flow into the housing through the air inlet 701, carrying the powder out through the air pump connection pipe 401. At the same time, the powder-selecting fan 9 on the third housing 4, during its rotation, will impact the large particles of material being drawn in, causing them to fall back onto the grinding disc 6. During operation, the air volume sensor 10 will monitor the air volume inside the equipment in real time and control the overlap between the through hole 104 and the air outlet connection pipe 102 by controlling the electric telescopic rod 105, thereby realizing the adjustment of the air volume at any time.

[0037] In summary, this utility model, by setting an air volume sensor 10, monitors the air volume in the equipment in real time. When the air volume changes, the movable ring 103 is rotated by the electric telescopic rod 105, causing the through hole 104 on the movable ring 103 to be misaligned with the rotation of the movable ring 103, thereby changing the air intake of the air outlet connecting pipe 102. Thus, the air intake can be adjusted in a timely manner according to the changes in airflow in the equipment, ensuring the stability of the air volume in the equipment. The hydraulic telescopic column 802 drives the mounting rod 801 to rotate, thereby adjusting the contact pressure of the roller 803 on the grinding disc 6, and lifting the roller 803 off the grinding disc 6 when maintaining the equipment.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vertical mill air supply device for cement production, comprising a base (1) and a housing, wherein the housing is disposed on the base (1), characterized in that, The housing contains, from bottom to top, a power platform (5), a grinding disc (6), a grinding roller (8), and a classifying fan (9); the power platform (5) has an air duct ring (7), and the side of the air duct ring (7) has multiple air inlets (701) extending to the outside of the housing; the grinding disc (6) is rotatably mounted on the power platform (5), concentric with the air duct ring (7) but not in contact with it, and the grinding roller (8) rotates and abuts against the grinding disc (6); the housing has a pump connecting pipe (401) located above the classifying fan (9), and the pump connecting pipe (401) is equipped with an air volume sensor (10); the base (1) is equipped with a card plate (101) corresponding to the position of each air inlet (701), the card plate (101) is movably inserted with an air outlet connecting pipe (102), the outer side of the card plate (101) is rotatably mounted with a movable ring (103), one end of the air outlet connecting pipe (102) is connected to the corresponding air inlet (701), and the other end abuts against the inner side of the movable ring (103), the movable ring (103) is provided with a through hole (104) that is compatible with the air outlet connecting pipe (102).

2. The air supply device for a vertical mill in cement production according to claim 1, characterized in that, The base (1) also includes an electric telescopic rod (105); one end of the electric telescopic rod (105) is rotatably mounted on the side of the card table (101), and the other end is rotatably connected to the bottom end of the movable ring (103); the movable ring (103) is rotatably set by the electric telescopic rod (105).

3. The air supply device for a vertical mill in cement production according to claim 1, characterized in that, The upper end of the card holder (101) is provided with a card plate (106), which is snapped onto the upper end of the movable ring (103); the card plate (106) is provided with mounting bolts (107), and the card plate (106) is detachably mounted on the card holder (101) by means of the mounting bolts (107).

4. The air supply device for a vertical mill in cement production according to claim 1, characterized in that, The housing consists of a first housing (2), a second housing (3), and a third housing (4) connected sequentially from bottom to top. The power station (5), grinding disc (6), and grinding roller (8) are located in the first housing (2). A feed pipe (301) is provided on the second housing (3), with one end of the feed pipe (301) extending to the outside of the second housing (3) and the other end extending above the grinding disc (6). A powder classifier fan (9) is installed on the third housing (4), and the air pump connecting pipe (401) is inclinedly arranged on the third housing (4) and located above the powder classifier fan (9).

5. The air supply device for a vertical mill in cement production according to claim 4, characterized in that, The power platform (5) is a hollow structure with an opening at the bottom. A first motor (601) is installed inside the power platform (5). The output shaft of the first motor (601) passes through the upper end of the power platform (5) and connects to the lower end face of the grinding disc (6).

6. The air supply device for a vertical mill in cement production according to claim 5, characterized in that, The grinding roller (8) includes a mounting rod (801) and a hydraulic telescopic column (802). Multiple mounting columns (501) are arranged sequentially along the circumference of the side of the power table (5). The rod body of the mounting rod (801) is rotatably mounted on the upper end of the mounting column (501). A roller body (803) is rotatably mounted on one end of the mounting rod (801) near the grinding disc (6), and the other end is raised and lowered by the hydraulic telescopic column (802). The side of the first housing (2) is provided with a matching side cavity (201) corresponding to the position of each hydraulic telescopic column (802). A cavity cover (202) is detachably mounted on the side cavity (201).

7. The air supply device for a vertical mill in cement production according to claim 4, characterized in that, The powder classifying fan (9) includes a fan blade (901). Several fan blades (901) are arranged sequentially along the circumference of the outer side of the powder classifying fan (9). An installation shaft (902) is fixedly installed at the center of the powder classifying fan (9). The installation shaft (902) is rotatably installed on the upper end of the third housing (4) and extends through the third housing (4) to the outside where a second motor (903) is installed.

Images