Sealing filler purging ring for feeding end and hollow shaft end face of coal mill
By installing a sealed filler purge ring on the feed end of the coal mill and using factory air for purge, the problem of coal slurry leakage at the sealed filler is solved, and the long-term operation of the equipment and the reduction of labor intensity is achieved.
Patent Information
- Application Number
- CN202422176633.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The coal slurry leaks at the sealing filler at the feed end of the coal mill and the hollow shaft end surface, resulting in frequent equipment failures, high labor intensity for manual cleaning, and a large number of equipment start and stop times.
A sealing filler purge ring is designed, including a purge outer ring and a purge thin pipe, and the sealing filler is purged through factory air to reduce the chance of coal slurry leaking into the gears of the coal mill.
Effectively reduce coal slurry leakage, reduce equipment failures, extend the operating cycle of coal mills, and reduce the intensity of manual labor.
Smart Images
Figure CN223144843U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal mills, in particular to a sealing packing purge ring for the feeding end and the end face of a hollow shaft of a coal mill. Background Art
[0002] The gasification device in the methanol department is divided into two series. The single-series coal mill has 6 units in operation and 1 standby unit, and adopts the American GE coal water slurry gasification process technology. The raw coal and grinding water enter the coal mill in a certain proportion. The ground coal slurry overflows from the overflow port of the coal mill into a drum screen, and after being screened by the drum screen, it is finally sent to a coal slurry tank for storage. The coal slurry in the coal slurry tank is pressurized by a slurry feed pump and sent into a process burner, and then enters the gasifier to react with high-pressure oxygen for gasification.
[0003] The coal mill belongs to a wet overflow type rod mill. The seal between the feeding end of the coal mill and the end face of the hollow shaft is a packing seal, and the main material is oil-impregnated asbestos gasket packing. Below the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft is the accumulation point of coal slurry leakage. The accumulated and leaked coal slurry enters the gap between the large and small gears of the coal mill through the large gear ring of the coal mill. The lubricating grease between the large and small gears is contaminated, and the oil film is damaged. When the oil film is severely damaged, the meshing of the large and small gears of the coal mill is poor, the vibration of the main motor and reducer of the coal mill is relatively large, the clutch hub bolts are broken, and the mixed coal slurry may also cause a fire incident.
[0004] The existing treatment method is to regularly replace the sealing packing at the feeding end and the end face of the hollow shaft, and manually clean the leaked coal slurry in time. The frequency of replacing the packing at this place is high, the labor intensity of manual cleaning is large, and the coal slurry leaking into the large and small gears of the coal mill increases the start-stop times of the equipment and the equipment failure rate. Content of the Utility Model
[0005] In order to solve the problems of the existing technology, the utility model provides a sealing packing purge ring for the feeding end and the end face of a hollow shaft of a coal mill, including:
[0006] A purge outer ring, connected to the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft;
[0007] A purge thin pipe, one end of which is connected to the purge outer ring and communicated with the purge outer ring, and one end of the purge thin pipe is close to the leakage point of the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft.
[0008] Furthermore, a fixed hoop is fixed at the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft, and the purge outer ring is connected to the fixed hoop through a plurality of fixed support plates.
[0009] Furthermore, the purge outer ring is composed of two semi-circular pipes, which are respectively connected to the outer sides of the two pieces of the fixed hoop through the fixed support plates.
[0010] Furthermore, there are multiple purge tubes.
[0011] Furthermore, the purge capillaries are evenly distributed on the purge outer ring.
[0012] Furthermore, the purge outer ring is also connected to a factory air input pipeline.
[0013] Furthermore, the factory air input pipeline is connected with a valve.
[0014] The beneficial effect of the technical solution provided by the utility model is as follows: in the utility model, a purge outer ring is connected at the sealing filler between the feed end of the coal mill and the end face of the hollow shaft, and a purge capillary is connected to the purge outer ring. By conveying a purge medium to the purge outer ring and purging at the sealing filler between the feed end of the coal mill and the end face of the hollow shaft through the purge capillary, the probability of coal slurry passing through the large gear ring of the coal mill and entering between the large and small gears of the coal mill can be effectively reduced, thereby ensuring long-term operation of the coal mill. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the connection between a sealing packing purge ring at the feed end of a coal mill and an end face of a hollow shaft and a coal mill provided by the utility model;
[0016] Figure 2 The utility model is a schematic diagram of a sealing packing purge ring structure between a coal mill feed end and a hollow shaft end face.
[0017] Figure numerals: 1-purge outer ring; 2-purge capillary tube; 3-fixed clamp; 4-fixed support plate; 5-factory air input pipeline; 6-valve; 7-coal mill; 8-drum screen. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.
[0020] It should be noted that in this embodiment, the directions or positional relationships indicated by "bottom", "top", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0021] It should also be noted that, in this embodiment, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] See also Figure 1 and Figure 2 A sealing packing purge ring for a coal mill feed end and a hollow shaft end face comprises a purge outer ring 1, the purge outer ring 1 is connected to the sealing packing at the coal mill feed end and the hollow shaft end face, a purge capillary 2 is connected to the purge outer ring 1, one end of the purge capillary 2 is close to the leakage point of the sealing packing at the coal mill feed end and the hollow shaft end face, and by conveying a purge medium to the purge outer ring 1 and purging the sealing packing at the coal mill feed end and the hollow shaft end face through the purge capillary 2, the probability of coal slurry passing through the large gear ring of the coal mill and entering between the large and small gears of the coal mill can be effectively reduced, thereby ensuring the long-term operation of the coal mill.
[0023] Furthermore, the purge outer ring 1 can be composed of two semicircular pipes, and the two semicircular pipes are respectively welded to the outer sides of the left and right clamps of the fixed clamp 3 through a number of fixed support plates 4; the left and right clamps of the fixed clamp 3 are sleeved on the sealing filler between the feed end of the coal mill and the end face of the hollow shaft, and fixed by bolts, so that the purge outer ring 1 and the sealing filler between the feed end of the coal mill and the end face of the hollow shaft are detachably connected.
[0024] In addition, the two semicircular pipes of the purge outer ring 1 are respectively connected with a plurality of purge capillaries 2, see Figure 2, in this embodiment, there are four purging capillary tubes 2 connected to each semi-circular pipe. The four purging capillary tubes 2 are evenly distributed on the semi-circular pipe. Both semi-circular pipes of the purging outer ring 1 are communicated with the purging capillary tubes 2. One end of both semi-circular pipes of the purging outer ring 1 is closed, and the other end of each is connected to a plant air conveying pipe 5. A valve 6 is connected to the plant air input pipe 5. The plant air is air that has undergone certain treatments (such as filtration, drying, etc.) and has been compressed to a certain pressure. The compressed plant air is conveyed into the two semi-circular pipes of the purging outer ring 1 through the plant air conveying pipe 5, and the purging outer ring 1 is used to purge the leakage point, so as to solve the problem that the coal slurry leaks from the sealing packing at the feeding end and the end face of the hollow shaft and enters the gap between the large gear ring and the large and small gears of the coal mill, reduce the number of starts and stops of the equipment and the equipment failure rate, and reduce the labor intensity of the staff.
[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A sealing packing purging ring for the feeding end of a coal mill and the end face of a hollow shaft, characterized in that Comprising: A purging outer ring (1), connected to the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft; A purging fine pipe (2), one end of which is connected to the purging outer ring (1) and communicates with the purging outer ring (1), and one end of the purging fine pipe (2) is close to the leakage point of the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft.
2. The sealing packing purge ring for the feed end of the coal mill and the end face of the hollow shaft according to claim 1, wherein, A fixed clamp (3) is fixed at the sealing packing at the feeding end of the coal mill and the end face of the hollow shaft, and the purging outer ring (1) is connected to the fixed clamp (3) through a plurality of fixed support plates (4).
3. The seal packing purge ring at the feed end of the coal mill and the end face of the hollow shaft according to claim 2, characterized in that, The purging outer ring (1) is composed of two semi-circular pipes, which are respectively connected to the outer sides of the two pieces of the fixed clamp (3) through the fixed support plates (4).
4. The sealing packing purge ring at the feed end of the coal mill and the end face of the hollow shaft according to claim 1, characterized in that The number of the purging fine pipes (2) is multiple.
5. The sealing filler purging ring for the feeding end of the coal mill and the end face of the hollow shaft according to claim 4, wherein The purging fine pipes (2) are equidistantly distributed on the purging outer ring (1).
6. The sealing packing purge ring for the feed end of the coal mill and the end face of the hollow shaft according to claim 1, characterized in that, A factory air input pipe (5) is also communicated with the purging outer ring (1).
7. The sealing packing blowing ring for the feeding end of the coal mill and the end face of the hollow shaft according to claim 6, characterized in that, A valve (6) is connected to the factory air input pipe (5).