Sealing device for manhole door of ball mill

Abstract

The utility model belongs to the technical field of sealing treatment of ball mills, and particularly discloses a sealing device for a manhole door of a ball mill, which comprises a square tube I, a bottom plate fixedly connected to the bottom of the square tube I, the manhole door arranged on the ball mill, a square tube II fixedly connected to the ball mill, the square tube II positioned on the manhole door, the square tube I sleeved on the square tube II, and the bottom plate attached to the manhole door. A first flange plate is fixedly connected to the first square pipe, a second flange plate is fixedly connected to the second square pipe, and the first flange plate is in bolted connection with the second flange plate. In the prior art, an outer cover type manhole cover is easy to cause ore leakage of a ball mill. According to the manhole door sealing structure, the second square pipe is arranged, the first square pipe is sleeved with the second square pipe, the first square pipe and the second square pipe are in flange connection, the bottom plate abuts against the manhole door, and therefore when the manhole door needs to be sealed to prevent ore leakage, the manhole door is sealed in the mode that the bottom plate abuts against the manhole door, and the first flange plate and the second flange plate are connected through bolts.

Description

Technical Field

[0001] The utility model relates to the technical field of ball mill sealing treatment, and particularly relates to a sealing device for a manhole door of a ball mill. Background Art

[0002] A ball mill is a powder processing device widely used in industries such as cement, steel, and ceramics. It drives grinding media (such as steel balls) to impact and grind materials by rotating the cylinder, so as to achieve the purpose of refining particles and improving the properties of materials.

[0003] The manhole door of a ball mill is a key component on the ball mill, mainly used to provide a passage into the interior of the ball mill, facilitating operations such as maintenance, cleaning, and component replacement.

[0004] The common manhole door of a ball mill in industrial production is an outer cover type manhole cover. The sealing structure of the outer cover type manhole cover is simple. There are varying degrees of gaps between the manhole door of the ball mill cylinder and the mounting plate of the manhole cover liner. The periphery of the manhole cover is fixed with bolts, and the manhole cover is installed on the flange at the manhole opening. The bolt holes of the manhole cover flange are open type card slots, and the displacement of each card slot relative to its nominal position is large. When installing the manhole cover, it is easy for the manhole cover and the grinding door liner to shift or tilt, which easily leads to poor sealing filling effect between the flanges and thus causes ore leakage during the operation of the equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sealing device for a manhole door of a ball mill to solve the problem that the use of an outer cover type manhole cover easily causes ore leakage in the ball mill.

[0006] To achieve the above purpose, the basic scheme provided by the utility model is: a sealing device for a manhole door of a ball mill, including a first square tube. The bottom of the first square tube is fixedly connected with a bottom plate. There is a manhole door on the ball mill, and a second square tube is fixedly connected to the ball mill. The second square tube is located above the manhole door. The first square tube is sleeved in the second square tube. The bottom plate is in contact with the manhole door. A first flange is fixedly connected to the first square tube, and a second flange is fixedly connected to the second square tube. The first flange and the second flange are bolted together.

[0007] The principle and beneficial effects of the utility model are as follows: By setting the second square tube and sleeving the first square tube in the second square tube, and connecting the first flange and the second flange by bolts, the bottom plate is pressed against the manhole door. When it is necessary to enter the ball mill through the manhole door for maintenance or feeding, the manhole door can be opened by removing the bolts and pulling out the first square tube along the second square tube; when it is necessary to seal the manhole door to prevent ore leakage at the manhole door, the manhole door can be closed and sealed by pressing the bottom plate against the manhole door and connecting the first flange and the second flange by bolts.

[0008] Solution 2, which is the preference of the basic solution. A lining plate is provided on the bottom plate, and the outer walls around the lining plate are attached to the inner walls around the manhole door. Through the setting of the lining plate, it is convenient to prevent materials such as steel balls in the ball mill from wearing the bottom plate. At the same time, the attachment of the lining plate to the manhole door makes the sealing effect better.

[0009] Solution 3, which is the preference of the basic solution. A rib plate is fixedly connected inside the first square pipe. Through the setting of the rib plate, it is convenient to reinforce the first square pipe and avoid the deformation of the square pipe caused by the continuous impact of materials such as steel balls inside during the operation of the ball mill.

[0010] Solution 4, which is the preference of Solution 2. The bottom plate and the lining plate are bolted. By bolt - connecting the bottom plate and the lining plate, it is convenient to replace the lining plate by installing and removing the bolts when needed.

[0011] Solution 5, which is the preference of Solution 2. A silicone rubber gasket is provided at the connection between the lining plate and the manhole door. Through the setting of the silicone rubber gasket, it is convenient to further enhance the sealing performance at the manhole door.

[0012] Solution 6, which is the preference of Solution 2. A zinc layer is provided on the outer wall of the lining plate. The lining plate is made of steel material, and there is often pulp and water in the ball mill. The steel material is prone to rust when in contact with water and oxygen for a long time. Through the setting of the zinc layer, it is convenient to reduce the probability of the lining plate rusting to a certain extent, and thus reduce the replacement frequency of the lining plate. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a sealing device for the manhole door of a ball mill;

[0014] Figure 2 is a front view of a sealing device for the manhole door of a ball mill;

[0015] Figure 3 is a schematic structural diagram of the manhole door of a sealing device for the manhole door of a ball mill;

[0016] Figure 4 is a schematic structural diagram of the silicone rubber gasket of a sealing device for the manhole door of a ball mill;

[0017] Figure 5 is a schematic structural diagram of the lining plate of a sealing device for the manhole door of a ball mill. Detailed Description of the Invention

[0018] The present invention will be further described in detail through the following specific embodiments:

[0019] The reference numerals in the accompanying drawings of the specification include: the first square pipe 1, the bottom plate 2, the ball mill 3, the manhole door 4, the second square pipe 5, the first flange 6, the second flange 7, the lining plate 8, the rib plate 9, and the silicone rubber gasket 10.

[0020] Embodiment

[0021] As shown in Figures 1 to 5 the figure: A sealing device for the manhole door of a ball mill, which includes a first square pipe 1. A bottom plate 2 is welded to the bottom of the first square pipe 1. There is a manhole door 4 on the ball mill 3. A second square pipe 5 is welded to the ball mill 3. The second square pipe 5 is located on the manhole door 4. The first square pipe 1 is sleeved on the second square pipe 5. The bottom plate 2 is in contact with the manhole door 4. A first flange 6 is welded on the first square pipe 1. A second flange 7 is welded on the second square pipe 5. The first flange 6 and the second flange 7 are bolted together. A lining plate 8 is bolted to the bottom plate 2. The outer walls around the lining plate 8 are in contact with the inner walls around the manhole door 4. A rib plate 9 is welded inside the first square pipe 1. A silicone rubber gasket 10 is provided at the connection between the lining plate 8 and the manhole door 4. A zinc layer is provided on the outer wall of the lining plate 8.

[0022] The implementation method of this embodiment is as follows:

[0023] When it is necessary to seal the manhole door 4, first push the first square pipe 1 along the second square pipe 5 towards the direction close to the manhole door 4 until the bottom plate 2 abuts against the manhole door 4. At the same time, the outer wall of the lining plate 8 is in contact with the inner wall of the manhole door 4 through the silicone rubber gasket 10. Then bolt the first flange 6 and the second flange 7 together.

[0024] When it is necessary to enter the ball mill 3 for maintenance through the manhole door 4 or to feed materials through the manhole door 4, first remove the bolts on the first flange 6 and the second flange 7. Then pull the first square pipe 1 along the second square pipe 5 in the direction away from the manhole door 4. At the same time, the lining plate 8 is pulled out together. Then remove the silicone rubber gasket 10. The operator enters the ball mill 3 for maintenance through the manhole door 4 or feeds materials into the ball mill 3 through the manhole door 4.

[0025] The above are only the embodiments of the present utility model. Common knowledge such as the specific structures and characteristics known in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, which should also be regarded as the protection scope of the present utility model. These will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims. The specific implementation methods described in the specification can be used to interpret the content of the claims.

Claims

1. A sealing device for a ball mill manhole door, characterized in that: The invention comprises a square tube (1), the bottom of which is fixedly connected to a bottom plate (2), a manhole door (4) is provided on the ball mill (3), a square tube (5) is fixedly connected to the ball mill (3), the square tube (5) is located on the manhole door (4), the square tube (1) is sleeved on the square tube (5), the bottom plate (2) and the manhole door (4) are fitted, a flange (6) is fixedly connected to the square tube (1), a flange (7) is fixedly connected to the square tube (5), and the flange (6) and the flange (7) are bolted together.

2. A sealing device for a ball mill manhole door according to claim 1, characterized in that: A lining plate (8) is provided on the bottom plate (2), and the outer walls of the lining plate (8) are in contact with the inner walls of the manhole door (4).

3. A sealing device for a ball mill manhole door according to claim 1, characterized in that: A rib plate (9) is fixedly connected inside the square tube (1).

4. A sealing device for a manhole door of a ball mill according to claim 2, characterized in that: The base plate (2) is connected to the lining plate (8) by bolts.

5. The sealing device for a ball mill manhole door according to claim 2, characterized in that: A silicone rubber gasket (10) is provided at the connection between the lining plate (8) and the manhole door (4).

6. A sealing device for a manhole door of a ball mill according to claim 2, characterized in that: A zinc layer is provided on the outer wall of the lining plate (8).

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