Sealing structure between cylinder and lining plate of rod mill

Abstract

The utility model discloses a sealing structure between a rod mill barrel and a lining plate, which comprises a base, a sealing gasket and a gland which are sequentially sleeved on a bolt from bottom to top, the top end of the bolt is in threaded connection with a nut, the bottom edge of the gland is coaxially and fixedly connected with a barrel-shaped limiting structure, and the sealing gasket is positioned in the limiting structure. The outer wall of the sealing gasket is attached to the inner side wall of the limiting structure, the bottom face of the sealing gasket is attached to the top face of the base, and the top face of the sealing gasket is attached to the bottom face of the gland. The effects of improving the sealing performance between the rod mill barrel and the lining plate and reducing the workload of maintenance personnel are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a sealing structure between a rod mill cylinder and a lining plate. Background Art

[0002] Coal slurry leakage at the fastener position of the rod mill cylinder liner has always been a major problem that has plagued the industry. Various companies are conducting various modifications and explorations on the sealing structure of the liner fastening bolts and the cylinder. The main reason is that there are many bolts on the rod mill cylinder. The 85T / H rod mill has as many as 336 sets of bolts. The sealing cycle of each set of bolts cannot be consistent. If there is a leak in the seal of any set of bolts, the machine must be shut down for leakage treatment.

[0003] Coal slurry leaks from the cylinder: First, the on-site environment is extremely poor, coal slurry adheres to the cylinder of the rod mill, and the base is full of coal slurry. Second, the on-site workload of employees cleaning the cylinder base is large and the cost is high. Third, the loss of coal slurry is large. Fourth, the maintenance personnel have high labor intensity, frequent maintenance, and time-consuming and labor-intensive.

[0004] Therefore, there is an urgent need for a sealing method that can solve the slurry leakage between the rod mill cylinder and the liner. Summary of the invention

[0005] The technical problem to be solved by the utility model is that the bolts between the cylinder and the liner are prone to seal leakage, resulting in the shutdown of the rod mill.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a sealing structure between the cylinder and the liner of a rod mill, including a base, a sealing gasket and a pressure cover which are sequentially mounted on the bolts from bottom to top, a nut is threadedly connected to the top of the bolt, and a cylindrical limiting structure is coaxially fixedly connected to the bottom edge of the pressure cover, the sealing gasket is located in the limiting structure, and the outer wall of the sealing gasket is in contact with the inner wall of the limiting structure, the bottom surface of the sealing gasket is in contact with the top surface of the base, and the top surface of the sealing gasket is in contact with the bottom surface of the pressure cover.

[0007] Preferably, an annular groove is coaxially arranged on the top of the base, an annular protrusion is arranged on the bottom end of the sealing gasket, and the annular protrusion is adapted to the annular groove.

[0008] Preferably, a gap is provided between the edge of the top surface of the base and the edge of the bottom surface of the sealing gasket.

[0009] Preferably, an anti-loosening washer is provided between the nut and the pressure cover, and the anti-loosening washer is sleeved on the bolt.

[0010] Preferably, the anti-loosening pad is a disc spring.

[0011] The utility model provides a sealing structure between a cylinder body and a liner of a rod mill, wherein a sealing gasket is added to a bolt, and a base and a pressure cover are used to clamp the sealing gasket, and the side wall edge of the pressure cover is used to limit the deformation of the surface of the bolt through a limiting structure, thereby ensuring a close fit between the sealing gasket and the outer wall of the bolt, and finally the pressure cover is compressed by a nut to achieve fixed installation, thereby avoiding leakage of coal slurry from the gap between the sealing gasket and the bolt due to deformation or loosening of the sealing gasket, reducing the maintenance frequency from once every three months to once every six months, reducing the workload of maintenance personnel, and preventing coal slurry from leaking, thereby improving the cylinder body and on-site environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 It is a schematic diagram of the internal structure of an embodiment of the utility model.

[0014] In the figure: 1. lining plate; 2. pressure cover; 3. anti-loosening pad; 4. nut; 5. bolt; 6. sealing pad; 7. base. DETAILED DESCRIPTION

[0015] like Figure 1 The utility model provides a sealing structure between a rod mill cylinder and a liner, comprising a base 7, a sealing gasket 6 and a gland 2 which are sequentially sleeved on a bolt 5 from bottom to top, a nut 4 being threadedly connected to the top of the bolt 5, a cylindrical limiting structure being coaxially fixedly connected to the bottom edge of the gland 2, the sealing gasket 6 being located in the limiting structure, and the outer wall of the sealing gasket 6 being in contact with the inner wall of the limiting structure, the bottom surface of the sealing gasket 6 being in contact with the top surface of the base 7, and the top surface of the sealing gasket 6 being in contact with the bottom surface of the gland 2.

[0016] When installing the sealing structure, first remove the original sealing gasket on the bolt 5, use an angle grinder to manually grind the area around the cylinder hole to remove paint and rust, then put the base 7 on the bolt 5, and then screw the nut 4 on the bolt 5. Use a hammer to adjust the position of the base 7, try to make the bolt 5 perpendicular to the liner 1, and then tighten the nut, weld the bottom edge of the base 7, wait for the base 7 to cool naturally, then remove the nut 4, and install the sealing gasket 6 and the upper pressure cover 2 on the base 7 in turn, finally install the anti-loosening pad 3 and the nut 4 on the bolt 5, and tighten the nut 4 as much as possible with a jackhammer.

[0017] The sealing gasket 6 is limited by the limiting structure at the bottom of the pressure cover 2 to avoid structural deformation of the sealing gasket 6 under pressure, ensure that the sealing gasket 6 is within a controllable deformation range, and make the sealing gasket 6 fit tightly with the bolt 5 to ensure the stability of the seal.

[0018] like Figure 1As shown. The top of the base 7 is coaxially provided with an annular groove, and the bottom of the sealing gasket 6 is provided with an annular protrusion, and the annular protrusion is adapted to the annular groove. The annular groove is located in the middle of the base 7. By inserting the annular protrusion of the sealing gasket 6 into the base 7, the outer wall of the annular protrusion fits with the inner wall of the annular groove, and the sealing gasket 6 is stably clamped and tightly fitted, thereby ensuring the sealing performance of the sealing gasket 6.

[0019] like Figure 1 As shown, to ensure that the gland 2 compresses the gasket 6 and gives the gasket 6 a certain deformation, the gasket 6 is completely fitted with the bolt 5 and the base 7. A gap is provided between the top edge of the base 7 and the bottom edge of the gasket 6. The setting of the gap provides a certain displacement space for the gland 2 to squeeze the gasket 6 downward.

[0020] like Figure 1 As shown, in order to prevent the nut 4 from loosening and causing the sealing failure of the sealing gasket 6, an anti-loosening gasket 3 is arranged between the nut 4 and the gland 2, and the anti-loosening gasket 3 is sleeved on the bolt 5.

[0021] As a preferred embodiment of the utility model, the anti-loosening pad 3 is a disc spring. The disc spring is squeezed by the nut 4, and the disc spring is elastically deformed to provide a greater biting force for the nut 4, so that the nut 4 is stably bitten on the bolt 5.

Claims

1. A sealing structure between a rod mill cylinder and a liner, characterized in that: The invention comprises a base (7), a sealing gasket (6) and a gland (2) which are sequentially mounted on a bolt (5) from bottom to top, the top end of the bolt (5) being threadedly connected to a nut (4), the bottom edge of the gland (2) being coaxially fixedly connected to a cylindrical limiting structure, the sealing gasket (6) being located in the limiting structure, the outer wall of the sealing gasket (6) being in contact with the inner wall of the limiting structure, the bottom surface of the sealing gasket (6) being in contact with the top surface of the base (7), and the top surface of the sealing gasket (6) being in contact with the bottom surface of the gland (2).

2. The sealing structure between the rod mill cylinder and the liner as claimed in claim 1, characterized in that: An annular groove is coaxially arranged on the top of the base (7), and an annular protrusion is arranged on the bottom end of the sealing gasket (6), and the annular protrusion is adapted to the annular groove.

3. The sealing structure between the rod mill cylinder and the liner as claimed in claim 2, characterized in that: A gap is provided between the top edge of the base (7) and the bottom edge of the sealing pad (6).

4. The sealing structure between the rod mill cylinder and the liner as claimed in claim 1, characterized in that: An anti-loosening washer (3) is provided between the nut (4) and the gland (2), and the anti-loosening washer (3) is sleeved on the bolt (5).

5. The sealing structure between the rod mill cylinder and the liner as claimed in claim 4, characterized in that: The anti-loosening pad (3) is a disc spring.

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