Sealing device for pull rod of coal mill

Abstract

The utility model belongs to the technical field of coal mills, and particularly relates to a coal mill pull rod sealing device which comprises a coal mill body, a limiting mechanism is arranged on the outer surface of the bottom of the coal mill body, and the limiting mechanism comprises a limiting ring, a mounting block, a limiting screw rod and a fastening screw rod. According to the sealing device for the pull rod of the coal mill, in order to prevent leakage when the pull rod is pulled, the protective cylinder is installed outside the pull rod, leakage cannot occur in a gap between the pull rod and the coal mill, then the protective cylinder is sleeved with the limiting ring, the limiting screw rod is installed in the installation block, and then the limiting screw ring is used for fastening, so that the left half ring and the right half ring are tightly connected together; the sealing ring seals the gap between the limiting ring and the protective cylinder, the fastening screw penetrates through the through hole to be in threaded connection with the interior of the coal mill body, then the limiting ring is fastened to the outer portion of the coal mill body, on one hand, the limiting ring stably seals the gap between the protective cylinder and the coal mill body, and on the other hand, disassembly and assembly are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to a pull rod sealing device for a coal mill. Background Art

[0002] As disclosed in a pull rod sealing device for a coal mill (application number: 202310866241.3) on the Chinese Patent Network, in order to strengthen the sealing performance of the coal mill and ensure that coal powder is not easily leaked, a sealing box, a sealing block, a sealing plate, a sealing ring, a sealing sleeve, etc. are provided on the coal mill. However, these mechanisms are all fixedly installed on the coal mill. In this way, it is inconvenient to replace them when they are damaged, and the damaged mechanisms cannot be removed and stuck inside the coal mill, which affects the use of the coal mill. Content of the Utility Model

[0003] Based on the technical problem that the existing sealing mechanism of the coal mill is inconvenient to disassemble, the utility model provides a pull rod sealing device for a coal mill.

[0004] A pull rod sealing device for a coal mill provided by the utility model includes a coal mill body. A limiting mechanism is arranged on the outer surface of the bottom of the coal mill body. The limiting mechanism includes a limiting ring, a mounting block, a limiting screw rod and a fastening screw rod. The fastening screw rod passes through the inside of the limiting ring to fasten the limiting ring to the outside of the coal mill body, and the limiting screw rod passes through the inside of the mounting block to tightly connect the two parts of the limiting ring together.

[0005] Preferably, a pull rod is slidably inserted into the bottom of the coal mill body. A protective cylinder is fixedly installed on the outer surface of the pull rod. The outer surface of the protective cylinder is slidably connected to the inside of the bottom of the coal mill body. The limiting ring is slidably connected to the outer surface of the protective cylinder. The limiting ring includes a left half ring and a right half ring.

[0006] Through the above technical solution, when the pull rod is pulled, the protective cylinder is driven to move. The protective cylinder wraps the pull rod, so that the gap between the pull rod and the coal mill will not leak.

[0007] Preferably, the right side surface of the left half ring contacts the left side surface of the right half ring. Sealing rings are fixedly connected to the inner side surfaces of the left half ring and the right half ring. The four mounting blocks are respectively fixedly installed on the upper and lower end surfaces of the left half ring and the right half ring. The limiting screw rod is threadedly connected to the inside of the mounting block.

[0008] Through the above technical solution, the limiting screw rod connects the mounting blocks of the left half ring and the right half ring together, so that the left half ring and the right half ring are connected together. The sealing ring seals the gap between the limiting ring and the protective cylinder.

[0009] Preferably, the outer surface of the limiting screw is threadedly connected to a limiting screw ring, the outer surface of the limiting screw ring contacts the outer surface of the mounting block, a limiting groove is opened in the bottom of the coal mill body, and a limiting ring is fixedly installed on the outer surface of the protective cylinder, and the outer surface of the limiting ring is slidably connected to the inside of the limiting groove.

[0010] Through the above technical solution, the limiting screw ring is installed on the limiting screw, so that the two mounting blocks fit tightly against each other, and the limiting ring slides in the limiting groove, ensuring that the protective tube will not separate from the coal mill body and slide stably.

[0011] Preferably, a control mechanism is fixedly installed in the bottom of the coal mill body, a connecting rod is fixedly installed on the left end surface of the pull rod, and the connecting rod is slidably connected to the inside of the control mechanism.

[0012] Through the above technical solution, the pull rod pulls the connecting rod to control the control mechanism, making it convenient to operate the coal mill body.

[0013] Preferably, the left and right half rings are each provided with a through hole, the fastening screw is slidably inserted into the through hole, and the fastening screw passes through the through hole and is threadedly connected to the interior of the coal mill body.

[0014] Through the above technical solution, the fastening screw passes through the through hole and is threadedly connected to the coal mill body, thereby fastening the limit ring to the outside of the coal mill body.

[0015] The beneficial effects of the present invention are:

[0016] By setting a limiting mechanism, in order to prevent leakage when the pull rod is pulled, a protective tube is installed outside the pull rod, which wraps the pull rod so that the gap between the pull rod and the coal mill will not leak. Then the limiting ring is put on the outside of the protective tube, and the limiting screw is installed in the mounting block. The limiting screw is then used to tighten the left half ring and the right half ring so that the left half ring and the right half ring are tightly connected together. The sealing ring seals the gap between the limiting ring and the protective tube, and the tightening screw passes through the through hole and is threaded into the coal mill body, thereby fastening the limiting ring to the outside of the coal mill body. On the one hand, the limiting ring can stably seal the gap between the protective tube and the coal mill body, and on the other hand, it is convenient for disassembly and assembly, thereby achieving the effect of facilitating disassembly of the sealing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a coal mill tie rod sealing device proposed by the utility model;

[0018] Figure 2 This is a cross-sectional view of the coal mill body structure of a coal mill tie rod sealing device proposed by the utility model;

[0019] Figure 3A three-dimensional view of the protective cylinder structure of a pull rod sealing device for a coal mill proposed by the present utility model.

[0020] In the figure: 1. Coal mill body; 11. Pull rod; 12. Protective cylinder; 13. Restriction groove; 14. Restriction ring; 15. Control mechanism; 16. Connecting rod; 2. Limit ring; 21. Left half ring; 22. Right half ring; 23. Sealing ring; 24. Through hole; 3. Installation block; 4. Limit screw; 41. Limit screw ring; 5. Tightening screw. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Refer to Figures 1 - 3 , a pull rod sealing device for a coal mill, including a coal mill body 1. In order to facilitate the limitation of the sealing mechanism, a limiting mechanism is provided on the outer surface of the bottom of the coal mill body 1. The limiting mechanism includes a limit ring 2, an installation block 3, a limit screw 4 and a tightening screw 5. The tightening screw 5 passes through the inside of the limit ring 2 to fasten the limit ring 2 to the outside of the coal mill body 1, and the limit screw 4 passes through the inside of the installation block 3 to closely connect the two parts of the limit ring 2 together.

[0023] In order to ensure that there is no leakage between the pull rod 11 and the coal mill, the pull rod 11 is slidably inserted into the bottom of the coal mill body 1. A protective cylinder 12 is fixedly installed on the outer surface of the pull rod 11. The outer surface of the protective cylinder 12 is slidably connected to the inside of the bottom of the coal mill body 1. The limit ring 2 is slidably connected to the outer surface of the protective cylinder 12. The limit ring 2 includes a left half ring 21 and a right half ring 22. When the pull rod 11 is pulled, the protective cylinder 12 is driven to move. The protective cylinder 12 wraps the pull rod 11 to prevent leakage between the pull rod 11 and the coal mill.

[0024] In order to facilitate the sealing of the gap between the limit ring 2 and the protective cylinder 12, the right side surface of the left half ring 21 contacts the left side surface of the right half ring 22. Sealing rings 23 are fixedly connected to the inner side surfaces of the left half ring 21 and the right half ring 22. Four installation blocks 3 are respectively fixedly installed on the upper and lower end surfaces of the left half ring 21 and the right half ring 22. The limit screw 4 is threadedly connected to the inside of the installation block 3. The limit screw 4 connects the installation blocks 3 of the left half ring 21 and the right half ring 22 together, so that the left half ring 21 and the right half ring 22 are connected together, and the sealing ring 23 seals the gap between the limit ring 2 and the protective cylinder 12.

[0025] In order to prevent the protective cylinder 12 from escaping from the coal mill body 1 and sliding stably, the outer surface of the limiting screw 4 is threadedly connected to the limiting screw ring 41, and the outer surface of the limiting screw ring 41 contacts the outer surface of the mounting block 3. A limiting groove 13 is opened in the bottom of the coal mill body 1, and a limiting ring 14 is fixedly installed on the outer surface of the protective cylinder 12. The outer surface of the limiting ring 14 is slidingly connected to the inside of the limiting groove 13. The limiting screw ring 41 is installed on the limiting screw 4 so that the two mounting blocks 3 fit tightly against each other, and the limiting ring 14 slides in the limiting groove 13, ensuring that the protective cylinder 12 will not escaping from the coal mill body 1 and sliding stably.

[0026] In order to facilitate the control of the coal mill body 1 using the pull rod 11, a control mechanism 15 is fixedly installed inside the bottom of the coal mill body 1, and a connecting rod 16 is fixedly installed on the left end surface of the pull rod 11. The connecting rod 16 is slidably connected to the inside of the control mechanism 15. The pull rod 11 pulls the connecting rod 16 to control the control mechanism 15, making it convenient to control the coal mill body 1.

[0027] In order to facilitate the fastening of the limit ring 2 to the outside of the coal mill body 1, a through hole 24 is opened inside the left half ring 21 and the right half ring 22, and the fastening screw 5 is slidably inserted into the inside of the through hole 24. The fastening screw 5 passes through the inside of the through hole 24 and is connected to the internal thread of the coal mill body 1. The fastening screw 5 passes through the through hole 24 and is threadedly connected to the coal mill body 1, thereby fastening the limit ring 2 to the outside of the coal mill body 1.

[0028] By setting a limiting mechanism, in order to prevent leakage when the pull rod 11 is pulled, a protective tube 12 is installed outside the pull rod 11, and the protective tube 12 wraps the pull rod 11, so that the gap between the pull rod 11 and the coal mill will not leak. Then the limiting ring 2 is put on the outside of the protective tube 12, and the limiting screw 4 is installed in the mounting block 3, and then fastened with the limiting screw ring 41, so that the left half ring 21 and the right half ring 22 are tightly connected together, and the sealing ring 23 seals the gap between the limiting ring 2 and the protective tube 12. The fastening screw 5 passes through the through hole 24 and is threadedly connected to the coal mill body 1, and then the limiting ring 2 is fastened to the outside of the coal mill body 1. On the one hand, the limiting ring 2 can stably seal the gap between the protective tube 12 and the coal mill body 1, and on the other hand, it is convenient for disassembly and assembly, thereby achieving the effect of facilitating disassembly of the sealing mechanism.

[0029] Working principle: In order to prevent leakage when the pull rod 11 is pulled, a protective tube 12 is installed outside the pull rod 11. The protective tube 12 wraps the pull rod 11 to prevent leakage from occurring in the gap between the pull rod 11 and the coal mill. Then the limit ring 2 is put on the outside of the protective tube 12, and the limit screw 4 is installed in the mounting block 3. The limit screw ring 41 is then used to tighten the left half ring 21 and the right half ring 22 so that they are tightly connected together. The sealing ring 23 seals the gap between the limit ring 2 and the protective tube 12. The tightening screw 5 passes through the through hole 24 and is threadedly connected to the coal mill body 1, thereby fastening the limit ring 2 to the outside of the coal mill body 1. On the one hand, the limit ring 2 can stably seal the gap between the protective tube 12 and the coal mill body 1, and on the other hand, it is convenient for disassembly and assembly.

[0030] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A sealing device for the pull rod of a coal mill, comprising a coal mill body (1), characterized in that: A limiting mechanism is provided on the outer surface of the bottom of the coal mill body (1). The limiting mechanism includes a limiting ring (2), a mounting block (3), a limiting screw (4) and a fastening screw (5). The fastening screw (5) passes through the inside of the limiting ring (2) to fasten the limiting ring (2) to the outside of the coal mill body (1). The limiting screw (4) passes through the inside of the mounting block (3) to closely connect the two parts of the limiting ring (2) together.

2. The coal mill pull rod sealing device according to claim 1, characterized in that: A pull rod (11) is slidably inserted into the bottom of the coal mill body (1). A protective cylinder (12) is fixedly installed on the outer surface of the pull rod (11). The outer surface of the protective cylinder (12) is slidably connected to the inside of the bottom of the coal mill body (1). The limiting ring (2) is slidably connected to the outer surface of the protective cylinder (12). The limiting ring (2) includes a left half-ring (21) and a right half-ring (22).

3. The coal mill pull rod sealing device according to claim 2, characterized in that: The right side surface of the left half-ring (21) contacts the left side surface of the right half-ring (22). Sealing rings (23) are fixedly connected to the inner side surfaces of the left half-ring (21) and the right half-ring (22). The four mounting blocks (3) are respectively fixedly installed on the upper and lower end surfaces of the left half-ring (21) and the right half-ring (22). The limiting screw (4) is threadedly connected to the inside of the mounting block (3).

4. The coal mill pull rod sealing device according to claim 2, characterized in that: A limiting screw ring (41) is threadedly connected to the outer surface of the limiting screw (4). The outer surface of the limiting screw ring (41) contacts the outer surface of the mounting block (3). A limiting groove (13) is provided in the bottom inside of the coal mill body (1). A limiting ring (14) is fixedly installed on the outer surface of the protective cylinder (12). The outer surface of the limiting ring (14) is slidably connected to the inside of the limiting groove (13).

5. The coal mill pull rod sealing device according to claim 2, characterized in that: A control mechanism (15) is fixedly installed in the bottom inside of the coal mill body (1). A connecting rod (16) is fixedly installed on the left end surface of the pull rod (11). The connecting rod (16) is slidably connected to the inside of the control mechanism (15).

6. The coal mill pull rod sealing device according to claim 2, characterized in that: Through holes (24) are provided inside both the left half-ring (21) and the right half-ring (22). The fastening screw (5) is slidably inserted into the inside of the through hole (24). The fastening screw (5) passes through the inside of the through hole (24) and is threadedly connected to the inside of the coal mill body (1).

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