Raw material vertical mill sealing anti-bleeding device

Abstract

The utility model discloses a raw material vertical mill sealing anti -leakage ash device relates to vertical mill sealing technical field, including vertical mill shell and the mill axle of rotation setting in the inside of vertical mill shell, the one side fixed mounting of vertical mill shell has the mill roll door, the one side fixedly connected with the clamping ring of mill roll door near vertical mill shell, the bottom fixedly connected with the clamping buckle of clamping ring, the one side of vertical mill shell is provided with first installation slot, the inner wall bottom of first installation slot is provided with the clamping groove, in the utility model, through setting clamping buckle and clamping groove clamping, it is convenient in through bolt installation mill roll door and fixed mill roll door and vertical mill shell in advance, promotes the operating efficiency of staff installation mill roll door, and sets up the seal ring barrier outside air and the circulation of vertical mill internal air on the outside of mill axle, sets up the inflatable pad that can inject air after air inlet cylinder expands, makes it and mill axle resist, further promotes the sealing anti -leakage ash effect to vertical mill.

Description

Technical Field

[0001] This utility model relates to the field of vertical mill sealing technology, specifically a sealing and ash-preventing device for a raw material vertical mill. Background Technology

[0002] When cement is produced, the raw cement meal needs to be ground into powder, which requires grinding equipment. Grinding equipment is equipped with grinding rollers. Vertical roller mill, also known as vertical mill, is used for grinding raw cement meal, cement clinker, slag and coal ash. It has the characteristics of simple structure and low manufacturing and use costs. Vertical roller mill grinds materials through internal grinding rollers.

[0003] A Chinese patent (publication number CN215277664U) discloses an integral door frame for sealing the grinding rollers of a vertical mill. By setting a sealing device on the inner wall of the threaded hole, and the sealing device including a bolt, the outer surface of the bolt is threaded to the inner wall of the threaded hole, which achieves the effect of sealing the grinding roller door to prevent air leakage. This solves the problem of air leakage in the grinding roller door caused by exposed bearings and large range of motion of the lifting roller, which greatly affects the distribution of raw materials, increases power consumption, increases oxygen content in the kiln tail, and increases the cost of ammonia water.

[0004] However, in actual use, when the above-mentioned integrated door frame for sealing the grinding rollers of the vertical mill is installed, the grinding roller door panel needs to be fixedly installed on one side of the outer steel plate. When installing the grinding roller door, multiple people need to work together or use auxiliary tools to initially fix the position of the grinding roller door and the vertical mill housing, and then fix it with bolts. The grinding roller door is relatively heavy, and it is inefficient to accurately align the mounting holes by manpower. Moreover, multiple people need to work together to fix it, and the adjustment time during installation is long, resulting in low installation efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing and anti-ash-passing device for a raw material vertical mill, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a sealing and anti-ash-passing device for a raw material vertical mill, including a vertical mill shell and a grinding shaft rotatably disposed inside the vertical mill shell. A grinding roller door is fixedly installed on one side of the vertical mill shell, and a snap-fit ​​ring is fixedly connected to the side of the grinding roller door near the vertical mill shell. A snap-fit ​​buckle is fixedly connected to the bottom of the snap-fit ​​ring. A first mounting groove is opened on one side of the vertical mill shell, and a snap-fit ​​groove is opened at the bottom of the inner wall of the first mounting groove. The snap-fit ​​buckle is movably snapped into the snap-fit ​​groove.

[0007] Furthermore, a second mounting groove is provided inside the grinding roller door, and an air pad is fixedly installed inside the second mounting groove. A through groove is provided on one side of the inside of the grinding roller door, and the through groove communicates with the second mounting groove. An air injection component is provided on one side of the air pad.

[0008] Furthermore, the air injection assembly includes an air inlet pipe fixedly connected to one side of the air pad, an installation groove is provided inside the grinding roller door, the air inlet pipe is fixedly installed inside the installation groove, an air inlet cylinder is fixedly connected to the end of the air inlet pipe away from the air pad, and a vent valve is fixedly installed on one side of the air inlet cylinder.

[0009] Furthermore, a circular through hole is provided inside the grinding roller door, and a sealing ring is fixedly installed on the inner wall of the circular through hole.

[0010] Furthermore, the sealing ring is made of silicone, and the number of sealing rings is set to multiple.

[0011] Furthermore, the number of the snap-fit ​​buckles is set to be multiple, and the number of the snap-fit ​​buckles is adapted to the number of the snap-fit ​​slots.

[0012] Furthermore, a mounting plate is fixedly connected to the outer side of the grinding roller door, and a bolt is threaded onto one side of the mounting plate.

[0013] Furthermore, the number of mounting plates is set to multiple, and the multiple mounting plates are fixedly connected to the outside of the grinding roller door at equal intervals.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a snap-fit ​​buckle and a snap-fit ​​groove, it is convenient to fix the grinding roller door and the vertical mill housing in advance when installing the grinding roller door with bolts, which improves the operation efficiency of the workers installing the grinding roller door. A sealing ring is set on the outside of the grinding shaft to block the flow of external air and internal air of the vertical mill. An air-filled pad that can be injected with air through the air inlet cylinder and expands to make it contact the grinding shaft, further improving the sealing and dust prevention effect of the vertical mill. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation location of the vertical mill housing and the grinding roller door of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the grinding roller door of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the internal structure of the vertical mill housing of this utility model;

[0018] Figure 4 This is a three-dimensional structural schematic diagram of the cross-section of the grinding roller door of this utility model.

[0019] In the diagram: 1. Vertical mill housing; 2. Grinding shaft; 3. Grinding roller door; 4. Mounting plate; 5. Bolt; 6. Snap-fit ​​ring; 7. Snap-fit ​​buckle; 8. Sealing ring; 9. First mounting groove; 10. Snap-fit ​​groove; 11. Second mounting groove; 12. Inflatable cushion; 13. Through groove; 14. Air inlet cylinder; 15. Air release valve; 16. Air inlet pipe. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 This utility model provides a technical solution: it includes a vertical mill housing 1 and a grinding shaft 2 rotatably disposed inside the vertical mill housing 1. A grinding roller door 3 is fixedly installed on one side of the vertical mill housing 1. A snap-fit ​​ring 6 is fixedly connected to the side of the grinding roller door 3 near the vertical mill housing 1. A snap-fit ​​buckle 7 is fixedly connected to the bottom of the snap-fit ​​ring 6. A first mounting groove 9 is opened on one side of the vertical mill housing 1. A snap-fit ​​groove 10 is opened at the bottom of the inner wall of the first mounting groove 9. The snap-fit ​​buckle 7 is movably snapped into the snap-fit ​​groove 10.

[0022] In practice, the operator can insert the snap ring 6 into the first mounting groove 9. The number of snap grooves 10 matches the number of snap buckles 7, so that the bottom of the snap buckle 7 is aligned with the top of the snap groove 10. The bottom of the snap groove 10 is provided with a sliding groove. After the snap buckle 7 is inserted into the snap groove 10, the grinding roller door 3 is rotated, so that the snap buckle 7 rotates with the snap ring 6. One bottom end of the snap buckle 7 slides to the bottom of the snap groove 10, so that the snap buckle 7 is snapped and fixed with the snap groove 10. This makes it easier for the operator to then tighten the bolt 5 into the interior of the mounting plate 4, further fixing the grinding roller door 3 to the vertical mill housing 1.

[0023] See Figure 4 The grinding roller door 3 has a second mounting groove 11 inside, and an air pad 12 is fixedly installed inside the second mounting groove 11. A through groove 13 is provided on one side of the inside of the grinding roller door 3, and the through groove 13 is connected to the second mounting groove 11. An air injection component is provided on one side of the air pad 12.

[0024] The air pad 12 is inflated by setting an air injection component, so that one end of the air pad 12 expands from the second mounting groove 11 into the through groove 13. The through groove 13 is located on the side near the grinding shaft 2. The through groove 13 is connected to the center of the second mounting groove 11 and the grinding roller door 3, so that one end of the air pad 12 can expand from the second mounting groove 11 into the through groove 13 until it touches the grinding shaft 2. The air pad 12 is made of wear-resistant material. After the air pad 12 expands, it can touch the grinding shaft 2, further improving the sealing effect on the grinding roller and preventing dust from entering.

[0025] See Figure 2 and Figure 4 The air injection assembly includes an air inlet pipe 16 fixedly connected to one side of the air pad 12. The inside of the grinding roller door 3 is provided with an installation groove. The air inlet pipe 16 is fixedly installed inside the installation groove. An air inlet cylinder 14 is fixedly connected to the end of the air inlet pipe 16 away from the air pad 12. A vent valve 15 is fixedly installed on one side of the air inlet cylinder 14.

[0026] By setting up an air inlet cylinder 14, the operator can inject air into the air inlet pipe 16 through the air inlet cylinder 14, causing the air pad 12 to inflate. After the air pad 12 is inflated, one end of the air pad 12 expands from the second mounting groove 11 into the through groove 13. The air pad 12 is made of wear-resistant material. After the air pad 12 expands, it can come into contact with the grinding shaft 2, further improving the sealing effect on the grinding roller and preventing dust from entering.

[0027] See Figure 4 The grinding roller door 3 has a circular through hole inside, and a sealing ring 8 is fixedly installed on the inner wall of the circular through hole. The sealing ring 8 is made of silicone, and there are multiple sealing rings 8.

[0028] The grinding shaft 2 is sealed by installing a sealing ring 8 inside the grinding roller door 3. The sealing ring 8 is located outside the grinding shaft 2 and is a high-temperature resistant flexible sealing silicone soft ring, which can block the flow of external air and internal air of the vertical mill.

[0029] See Figure 4 The number of snap fasteners 7 is set to be multiple, and the number of snap fasteners 7 is adapted to the number of snap slots 10.

[0030] By setting multiple snap-fit ​​buckles 7, the multiple snap-fit ​​buckles 7 are snapped and fixed with the snap-fit ​​groove 10, which improves the stability of the initial fixation between the grinding roller door 3 and the vertical mill housing 1, and facilitates the subsequent installation of bolts 5, so that bolts 5 can be rotated into the interior of the mounting plate 4 and into the threaded hole opened on the vertical mill housing 1.

[0031] See Figure 1 A mounting plate 4 is fixedly connected to one side of the outer side of the grinding roller door 3. A bolt 5 is threadedly connected to one side of the mounting plate 4. Multiple mounting plates 4 are provided, and multiple mounting plates 4 are fixedly connected to the outer side of the grinding roller door 3 at equal intervals.

[0032] By setting multiple mounting plates 4, each with matching threaded holes on the mounting plate 4 and the vertical mill housing 1, bolts 5 can be threaded into the threaded holes to fix the mounting plate 4 to the vertical mill housing 1. By setting multiple mounting plates 4, the stability of fixing the grinding roller door 3 is improved.

[0033] Working principle: When using the device, the operator can insert the snap ring 6 into the first mounting groove 9, so that the bottom of the snap buckle 7 is aligned with the top of the snap groove 10. The bottom of the snap groove 10 is provided with a sliding groove. After the snap buckle 7 is inserted into the snap groove 10, the grinding roller door 3 is rotated, so that the snap buckle 7 rotates with the snap ring 6. One end of the bottom of the snap buckle 7 slides to the bottom of the snap groove 10, so that the snap buckle 7 is snapped and fixed with the snap groove 10. This makes it easy for the operator to then tighten the bolt 5 into the inside of the mounting plate 4, further fixing the grinding roller door 3 to the vertical mill housing 1.

[0034] The inside of the grinding roller door 3 is equipped with a sealing ring 8 to seal the grinding shaft 2. The sealing ring 8 is located on the outside of the grinding shaft 2. The sealing ring 8 is a high-temperature resistant flexible sealing silicone soft ring, which can block the flow of external air and internal air of the vertical mill. The operator can also inject air into the air inlet pipe 16 through the air inlet cylinder 14 to inflate the air pad 12. After the air pad 12 is inflated, one end of the air pad 12 expands from the second mounting groove 11 into the through groove 13. The air pad 12 is made of wear-resistant material. After the air pad 12 is inflated, it can come into contact with the grinding shaft 2, further improving the sealing effect on the grinding roller and preventing dust from entering.

Claims

1. A raw material vertical mill sealing anti-pulverized ash device, comprising a vertical mill shell (1) and a mill shaft (2) rotatingly arranged inside the vertical mill shell (1), characterized in that: A grinding roller door (3) is fixedly installed on one side of the vertical mill housing (1). A snap ring (6) is fixedly connected to the side of the grinding roller door (3) near the vertical mill housing (1). A snap buckle (7) is fixedly connected to the bottom of the snap ring (6). A first mounting groove (9) is opened on one side of the vertical mill housing (1). A snap groove (10) is opened at the bottom of the inner wall of the first mounting groove (9). The snap buckle (7) is movably snapped into the snap groove (10).

2. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 1, characterized in that: The grinding roller door (3) has a second mounting groove (11) inside, and an air pad (12) is fixedly installed inside the second mounting groove (11). A through groove (13) is provided on one side of the grinding roller door (3), and the through groove (13) is connected to the second mounting groove (11). An air injection component is provided on one side of the air pad (12).

3. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 2, characterized in that: The air injection assembly includes an air inlet pipe (16) fixedly connected to one side of the air pad (12). The grinding roller door (3) has an installation groove inside. The air inlet pipe (16) is fixedly installed inside the installation groove. An air inlet cylinder (14) is fixedly connected to one end of the air inlet pipe (16) away from the air pad (12). A vent valve (15) is fixedly installed on one side of the air inlet cylinder (14).

4. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 3, characterized in that: The grinding roller door (3) has a circular through hole inside, and a sealing ring (8) is fixedly installed on the inner wall of the circular through hole.

5. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 4, characterized in that: The sealing ring (8) is made of silicone, and there are multiple sealing rings (8).

6. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 5, characterized in that: The number of the snap fasteners (7) is set to be multiple, and the number of the snap fasteners (7) is adapted to the number of the snap slots (10).

7. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 6, characterized in that: A mounting plate (4) is fixedly connected to the outer side of the grinding roller door (3), and a bolt (5) is threadedly connected to one side of the mounting plate (4).

8. The sealing and anti-ash-passing device for a raw material vertical mill as described in claim 7, characterized in that: The number of mounting plates (4) is set to multiple, and the multiple mounting plates (4) are fixedly connected to the outside of the grinding roller door (3) at equal intervals.

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