Sealing structure for pull rod of coal mill
By designing a coal mill tie rod sealing structure including a fixed rod, a tie rod and a sealing cylinder, the problem of powder leakage and wear of the tie rod seal in a high-temperature coal powder environment is solved, and good sealing effect and production efficiency are improved.
Patent Information
- Application Number
- CN202421784625.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In the coal powder preparation industry, the tie rod seals of ball coal mills are prone to powder leakage and wear problems in high-temperature coal powder environments, resulting in reduced production efficiency.
A coal mill tie rod sealing structure is designed, including a fixing rod, a tie rod and a sealing cylinder. The sealing cylinder is fixedly connected to the tie rod through a mounting ring, and is equipped with an inner sealing ring, an outer sealing ring and a sealing skirt, which can maintain a good sealing effect when the tie rod moves.
Through this design, the seal can effectively avoid powder leakage and wear in high-temperature coal powder environment, and improve sealing performance and production efficiency.
Smart Images
Figure CN222811218U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tie rod sealing structures, in particular to a tie rod sealing structure for a coal mill. Background Art
[0002] In the coal powder preparation industry, ball mills were once commonly used equipment. However, in recent years, medium-speed rotary disc mills have gradually become popular and widely used. The working principle of this equipment is to use an electric motor to drive the grinding disc to rotate through a reducer, and the movement of the grinding disc causes three grinding plates separated by 120° to rotate passively. The raw coal is transported to the surface of the grinding disc through the coal inlet pipe, and moves radially to the edge of the grinding disc under the action of centrifugal force, evenly enters the grinding channel, and is ground between the grinding disc and the grinding plates. The pressure required for grinding is provided by an independent hydraulic device through a loading frame and a tie rod, where the tie rod extends from the inside of the closed medium-speed mixing disc mill to connect the piston rod in the hydraulic cylinder.
[0003] At present, the tie rod is usually made of rigid materials, and its seal is placed in the environment of high-temperature coal powder. Due to the frequent vertical movement of the tie rod, this often causes the seal to leak powder and causes the tie rod itself to suffer wear, thereby reducing production efficiency. Utility Model Content
[0004] The utility model aims to provide a coal mill tie rod sealing structure, which can avoid the problem of frequent powder leakage and tie rod wear when the sealing element is in a high-temperature coal powder environment and the tie rod moves in multiple directions.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A coal mill rod sealing structure comprises a fixed rod and a rod, wherein the fixed rod is fixedly installed with an inner sealing ring, the outer wall of the inner sealing ring is provided with a sealing skirt 1, the sealing skirt 1 contacts the inner wall of a sealing cylinder, the sealing cylinder is provided with a sealing cabin and a movable cabin in sequence, the movable cabin is located at the connection between the fixed rod and the rod, the sealing cabin is fixedly installed with an outer sealing ring, the outer sealing ring is provided with a sealing skirt 2, the sealing skirt 2 contacts the outer wall of the fixed rod, the sealing cylinder is fixedly connected to the rod through a mounting ring, and moves vertically with the rod.
[0007] Preferably, the height of the movable cabin can satisfy the requirement that the sealing cylinder still covers the fixed rod and the pull rod when the sealing cylinder moves vertically with the pull rod.
[0008] Preferably, the sealed cabin is located below the movable cabin.
[0009] Preferably, the second sealing skirt is in a Y shape.
[0010] Preferably, the mounting ring is fixed to the outer wall of the pull rod by bolts.
[0011] Preferably, the mounting ring is provided with mounting holes, and the mounting holes are evenly distributed on the mounting ring.
[0012] Preferably, a connecting ring is provided at the upper end of the sealing cylinder, and the connecting ring is provided with a connecting hole, and the connecting hole corresponds to the mounting hole and is connected by bolts.
[0013] The utility model has the following beneficial effects:
[0014] 1. The present application includes a fixed rod and a pull rod, wherein the fixed rod is fixedly mounted with an inner sealing ring, and the outer wall of the inner sealing ring is provided with a sealing skirt 1, which contacts the inner wall of the sealing cylinder. This structure helps to achieve a good sealing effect.
[0015] 2. The sealing cylinder is provided with a sealing chamber, on which an outer sealing ring is fixedly installed, and the outer sealing ring is provided with a sealing skirt 2, which contacts the outer wall of the fixed rod. This double sealing design further improves the sealing performance.
[0016] 3. The sealing cylinder is fixedly connected to the tie rod through the mounting ring and moves vertically with the tie rod. This design enables the sealing structure to adapt to the movement of the tie rod and maintain the sealing effect.
[0017] 4. The sealing cylinder is equipped with a movable cabin located at the connection between the fixed rod and the pull rod. The height of the movable cabin can ensure that the sealing cylinder still covers the fixed rod and the pull rod when the pull rod moves vertically. This design helps to ensure that a good sealing effect is always maintained during the movement of the pull rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic diagram of an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the utility model;
[0021] Figure 3 This is a parts disassembly diagram of an embodiment of the utility model.
[0022] In the figure: 1. fixing rod; 2. pulling rod; 3. inner sealing ring; 4. sealing skirt 1; 5. sealing cylinder; 6. sealing cabin; 7. outer sealing ring; 8. sealing skirt 2; 9. mounting ring; 10. movable cabin; 11. mounting hole; 12. connecting ring; 13. connecting hole; 14 upper sealing groove; 15. sealing ring. DETAILED DESCRIPTION
[0023] A coal mill rod sealing structure comprises a fixed rod 1 and a rod 2, wherein the fixed rod 1 is fixedly mounted with an inner sealing ring 3, the outer wall of the inner sealing ring 3 is provided with a sealing skirt 4, the sealing skirt 4 contacts the inner wall of a sealing cylinder 5, the sealing cylinder 5 is provided with a sealing cabin 6, the sealing cabin is fixedly mounted with an outer sealing ring 7, the inner wall of the outer sealing ring 7 is provided with a sealing skirt 2 8, the sealing skirt 2 8 contacts the fixed rod 1, the sealing cylinder 5 is fixedly connected with the rod 2 through a mounting ring 9, and moves vertically with the rod 2.
[0024] Furthermore, the sealing cylinder 5 is provided with a movable cabin 10 . The movable cabin 10 is located at the connection between the fixing rod 1 and the pulling rod 2 .
[0025] The height of the movable cabin 10 can satisfy the requirement that the sealing cylinder 5 still covers the fixed rod 1 and the pull rod 2 when the sealing cylinder 5 moves vertically with the pull rod 2. The sealing cabin 6 is located below the movable cabin 10.
[0026] Furthermore, the sealing skirt 1 4 and the sealing skirt 2 8 can be made of fluororubber 246 sealing material, which meets the requirements of temperature, pressure, wear resistance and life, and has good elasticity and strong adjustability. The sealing skirt 2 8 is Y-shaped.
[0027] Further, the mounting ring 9 is fixedly mounted on the outer wall of the pull rod 2 by bolts. The mounting ring 9 is provided with mounting holes 11, and the mounting holes 11 are evenly distributed on the mounting ring 9. The upper end of the sealing cylinder 5 is provided with a connecting ring 12, and the connecting ring 12 is provided with a connecting hole 13, and the connecting hole 13 corresponds to the mounting hole 11 and is connected by bolts.
Claims
1. A coal mill tie rod sealing structure, comprising a fixed rod (1) and a tie rod (2), characterized in that: The fixed rod (1) is fixedly mounted with an inner sealing ring (3), the outer wall of the inner sealing ring (3) is provided with a sealing skirt (4), the sealing skirt (4) is in contact with the inner wall of the sealing cylinder (5), the sealing cylinder (5) is provided with a sealing cabin (6) and a movable cabin (10) in sequence, the movable cabin (10) is located at the connection between the fixed rod (1) and the pull rod (2), the sealing cabin is fixedly mounted with an outer sealing ring (7), the outer sealing ring (7) is provided with a sealing skirt (8), the sealing skirt (8) is in contact with the outer wall of the fixed rod (1), the sealing cylinder (5) is fixedly connected to the pull rod (2) via a mounting ring (9), and moves vertically with the pull rod (2).
2. A coal mill rod sealing structure according to claim 1, characterized in that: The height of the movable cabin (10) can be such that the sealing cylinder (5) can still cover the fixed rod (1) and the pull rod (2) when the sealing cylinder (5) moves vertically with the pull rod (2).
3. A coal mill tie rod sealing structure according to claim 1, characterized in that: The sealed cabin (6) is located below the movable cabin (10).
4. A coal mill tie rod sealing structure according to claim 1, characterized in that: The second sealing skirt (8) is in a Y shape.
5. The rod sealing structure of a coal mill according to claim 1, characterized in that: The mounting ring (9) is fixed to the outer wall of the pull rod (2) by means of bolts.
6. A coal mill rod sealing structure according to claim 5, characterized in that: The mounting ring (9) is provided with mounting holes (11), and the mounting holes (11) are evenly distributed on the mounting ring (9).
7. A coal mill tie rod sealing structure according to claim 1, characterized in that: The upper end of the sealing cylinder (5) is provided with a connecting ring (12), the connecting ring (12) is provided with a connecting hole (13), the connecting hole (13) corresponds to the mounting hole (11), and is connected via bolts.