A new type of coal mill carbon ring protection device

Abstract

The utility model discloses a novel coal mill carbon ring protection device, including coal mill body, the coal mill body is divided into outer chamber and inner chamber through annular partition, wherein, the bottom plate of outer chamber is opened round hole, and the lower part of round hole is connected with the same coal discharge pipe of round hole diameter, and the coal discharge pipe is connected with coal storage box, the outer chamber still is equipped with the input shaft that extends from the inner chamber, and the transmission disc of input shaft end part is welded with scraper, to collect the coal block of entering outer chamber and send into coal discharge pipe, the utility model belongs to coal mill technical field, and specifically refers to a kind of novel coal mill carbon ring protection device, to optimize the carbon ring chamber structure of coal mill, increase protection device, ensure that coal mill abnormal operating condition, such as coal mill inside full coal, coal mill inside coal block does not damage carbon ring.

Description

Technical Field

[0001] This utility model belongs to the field of coal mill technology, specifically referring to a new type of coal mill carbon concentrate ring protection device. Background Technology

[0002] Currently, medium-speed bowl mills generally have a sealing device at the input shaft, with carbon ring seals being the most common type. The working principle involves multiple (usually four) separate carbon rings tightly fitted to the input shaft under the action of clamping springs. High-pressure sealing air is injected between the carbon rings to prevent hot air from inside the mill from leaking out from the input shaft. The advantages and disadvantages of the carbon ring sealing device are as follows:

[0003] Advantages: The carbon ring is hard and wear-resistant, has a long service life under normal circumstances, and provides good sealing performance.

[0004] shortcoming:

[0005] 1) The carbon ring is relatively brittle. When the coal mill is running abnormally, coal lumps enter the carbon ring and squeeze it, which can easily cause the carbon ring to break and lose its sealing effect.

[0006] 2) The carbon ring is embedded in the groove. When coal enters the carbon ring, it gets stuck in the groove and cannot move freely. As a result, the carbon ring cannot fit tightly against the input shaft, and the sealing effect is lost.

[0007] 3) The original design placed the carbon concentrate ring chamber in a connection with the inside of the coal mill, relying on high-pressure sealing air to prevent coal blocks from entering the carbon concentrate ring chamber. If the coal mill operates abnormally, such as when the inside of the coal mill is full of coal, coal blocks will enter the carbon concentrate ring chamber and damage the carbon concentrate ring. Utility Model Content

[0008] The present invention optimizes the structure of the carbon concentrate ring chamber of a coal mill and adds a protective device to ensure that, under abnormal operation conditions, such as when the coal mill is full of coal, the coal blocks inside the coal mill will not damage the carbon concentrate ring.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: This utility model proposes a novel coal mill carbon concentrate ring protection device, including a coal mill body, wherein the coal mill body is divided into an outer chamber and an inner chamber by an annular partition;

[0010] The outer chamber has a circular hole on its bottom plate, and a coal discharge pipe with the same diameter as the circular hole is connected to the lower part of the circular hole. The coal discharge pipe is connected to a coal storage box.

[0011] The outer chamber is also equipped with an input shaft extending from the inner chamber. A scraper is welded on the transmission disc at the end of the input shaft to collect coal blocks entering the outer chamber and send them into the coal discharge pipe.

[0012] Furthermore, a pneumatic sliding door is provided between the coal storage box and the coal discharge pipe, and a pneumatic sliding door is provided at the lower end of the coal storage box opposite to the pneumatic sliding door. The pneumatic sliding door and the pneumatic sliding door control the entry and exit of coal.

[0013] Furthermore, the spatial ratio of the inner chamber to the outer chamber is 2:8.

[0014] Furthermore, the height of the partition is 70% of the total volume of the inner and outer chambers.

[0015] Furthermore, an outer protective cover is provided on the outside of the outer chamber.

[0016] The beneficial effects of this utility model by adopting the above structure are as follows:

[0017] 1. A partition is installed to divide the carbon concentrate ring chamber of the coal mill into two chambers, an inner and an outer chamber. The outer chamber is connected to the inside of the coal mill, which solves the problem of carbon concentrate ring damage under abnormal operation conditions, such as when the inside of the coal mill is full of coal, and improves the operational reliability of the coal mill.

[0018] 2. It has a simple structure, reliable operation, and can be used for a long time after one installation. The amount of maintenance work in daily operation is small. Attached Figure Description

[0019] Figure 1 The following are detailed drawings of the improvements made to this utility model.

[0020] The components include: 1. Coal mill body; 2. Partition plate; 3. Outer chamber; 4. Inner chamber; 5. Circular hole; 6. Coal discharge pipe; 7. Coal storage box; 8. Input shaft; 9. Transmission disc; 10. Scraper; 11. Pneumatic slide gate one; 12. Pneumatic slide gate two; 13. Outer protective cover. Detailed Implementation

[0021] 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.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] As per the instruction manual Figure 1 As shown, a novel coal mill carbon concentrate ring protection device includes a coal mill body 1. The coal mill body 1 is divided into an outer chamber 3 and an inner chamber 4 by an annular partition 2. The height of the partition 2 is 70% of the total volume of the inner chamber 4 and the outer chamber 3. The space ratio of the inner chamber 4 to the outer chamber 3 is 2:8.

[0025] The outer chamber 3 has a circular hole 5 on its bottom plate. The lower part of the circular hole 5 is connected to a coal discharge pipe 6 with the same diameter as the circular hole 5. The coal discharge pipe 6 is connected to a coal storage box 7. The outer side of the outer chamber 3 is also equipped with an outer protective cover 13. A pneumatic insert plate isolation door 11 is installed between the coal storage box 7 and the coal discharge pipe 6. The lower end of the coal storage box 7 is equipped with a pneumatic insert plate isolation door 2 12 opposite to the pneumatic insert plate isolation door 11. The pneumatic insert plate isolation door 11 and the pneumatic insert plate isolation door 2 12 control the entry and exit of coal. The outer chamber 3 is also equipped with an input shaft 8 extending from the inner chamber 4. A scraper 10 is welded on the transmission disc 9 at the end of the input shaft 8 to collect the coal blocks entering the outer chamber 3 and send them into the coal discharge pipe 6.

[0026] In its specific implementation, this utility model divides the carbon concentrate annular chamber into two chambers, an inner chamber 4 and an outer chamber 3, using two annular partitions. These chambers, along with a coal discharge pipe 6 and a coal storage box 7, form a coal discharge system. When circumferentially cutting the bottom plate of the carbon concentrate annular chamber of the coal mill, the cut bottom plate is lowered to its lowest position to facilitate subsequent construction. This process uses a circumferential cutting machine or a lathe tool to ensure a smooth cut for easy restoration later. A 100mm diameter circular hole 5 is drilled in the bottom plate of the outer chamber 4, and an annular partition 2 is welded to the bottom plate. A scraper 10 is welded to the transmission disc 9. The size of the 10 is slightly smaller than that of the outer chamber 4 of the carbon ring. It is used to collect the coal blocks entering the outer chamber 4 and send them into the coal discharge pipe 6. The bottom plate of the carbon ring chamber is restored to its original position. Before welding, beveling is required to ensure the welding strength. When the coal blocks enter the carbon ring chamber, they will first enter the outer chamber 4 and will not directly enter the inner chamber 3 where the carbon ring is located. The coal discharge box 7 collects the carbon ring through the opened pneumatic slide isolation door 11 and discharges the coal blocks entering the outer chamber 4 through the opened pneumatic slide isolation door 2 12 to prevent the coal blocks from entering the inner chamber 3.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A novel protective device for the carbon concentrate ring of a coal mill, comprising a coal mill body (1), characterized in that: The coal mill body (1) is divided into an outer chamber (3) and an inner chamber (4) by an annular partition (2); Among them, a circular hole (5) is opened on the bottom plate of the outer chamber (3), and a coal discharge pipe (6) with the same diameter as the circular hole (5) is connected to the lower part of the circular hole (5). The coal discharge pipe (6) is connected to the coal storage box (7). The outer chamber (3) is also provided with an input shaft (8) extending from the inner chamber (4). A scraper (10) is welded on the transmission disc (9) at the end of the input shaft (8) to collect coal blocks entering the outer chamber (3) and send them into the coal discharge pipe (6).

2. The novel coal mill carbon concentrate ring protection device according to claim 1, characterized in that: A pneumatic insert isolation door 1 (11) is provided between the coal storage box (7) and the coal discharge pipe (6). A pneumatic insert isolation door 2 (12) is provided at the lower end of the coal storage box (7) opposite to the pneumatic insert isolation door 1 (11). The pneumatic insert isolation door 1 (11) and the pneumatic insert isolation door 2 (12) control the entry and exit of coal.

3. The novel coal mill carbon concentrate ring protection device according to claim 1, characterized in that: The spatial ratio of the inner chamber (4) to the outer chamber (3) is 2:

8.

4. The novel coal mill carbon concentrate ring protection device according to claim 1, characterized in that: The height of the partition (2) is 70% of the total volume of the inner chamber (4) and the outer chamber (3).

5. The novel coal mill carbon concentrate ring protection device according to claim 1, characterized in that: The outer side of the outer chamber (3) is also provided with an outer protective cover (13).

Images