Barrel sealing and leakage-proof device of rod mill

Abstract

The utility model discloses a rod mill cylinder body sealing and leakage-proof device which comprises a rod mill cylinder body, a lining plate is arranged in the rod mill cylinder body, the lining plate is fixed on the inner wall of the rod mill cylinder body through a leakage-proof bolt, and the leakage-proof bolt comprises a screw rod. The top of the screw rod sequentially penetrates through the lining plate and the rod mill barrel from the inside of the rod mill barrel to the outside and then is locked through a nut, and an anti-leakage gasket is further arranged on the screw rod between the rod mill barrel and the nut; according to the device, the anti-leakage gasket is arranged on the screw rod between the rod mill barrel and the nut, so that the bolt hole of the barrel is effectively sealed, and the problem that the bolt hole of the barrel cannot be effectively sealed by an existing sealing structure is solved; and meanwhile, the device solves the problem that sealing cannot be realized due to the fact that an existing sealing ring is not tightly attached to the arc surface of the outer wall of the rod mill barrel in a manner that the first expansion sealing ring and the second expansion sealing ring are attached to the inner wall of the steel sealing ring body in a sealing manner.

Description

Technical Field

[0001] The utility model belongs to the technical field of rod mills and relates to a rod mill cylinder sealing and leakage prevention device. Background Art

[0002] Rod mill is a kind of ore dressing and grinding equipment. The working part is mainly concentrated in the cylinder. To prevent the cylinder from wear, a wear-resistant liner is installed inside the cylinder and fixed to the cylinder by bolts. At the same time, in order to increase the grinding efficiency, a certain amount of steel rods are added inside the cylinder. When the cylinder rotates, the steel rods and the materials reach a certain height and then fall down to grind the materials. However, in the process of grinding the materials, the cylinder bolts will be subjected to huge impact and extrusion forces, which can easily loosen the bolts and cause the materials to leak out of the cylinder bolt holes. This situation is particularly serious in wet rod mills, which not only easily damages the cylinder and affects the normal use of the cylinder, but also causes material waste and serious pollution to the environment.

[0003] At present, sealing rings are usually used to seal bolt holes. However, since the outer wall of the cylinder is cylindrical and surrounded by curved surfaces, the sealing ring cannot completely and effectively contact the cylinder. When the nut is tightened too much, the sealing ring is likely to break. Therefore, the traditional sealing structure cannot effectively seal the bolt holes of the cylinder. Utility Model Content

[0004] The utility model aims to provide a rod mill cylinder sealing and leak-proof device, which solves the problem in the prior art that the existing sealing structure cannot effectively seal the bolt holes of the cylinder.

[0005] The technical solution adopted by the utility model is that the rod mill cylinder sealing and leak-proof device is arranged on the rod mill cylinder, a liner is arranged inside the rod mill cylinder, the liner is fixed to the inner wall of the rod mill cylinder by leak-proof bolts, the leak-proof bolts include a screw, the top of the screw passes through the liner and the rod mill cylinder from the inside of the rod mill cylinder outward in sequence and is then locked by a nut, and a leak-proof gasket is also arranged on the screw between the rod mill cylinder and the nut;

[0006] The leak-proof gasket includes a steel sealing ring, one end of which is welded to the rod mill cylinder, and the other end of which is sequentially provided with a gland and a disc spring, and the steel sealing ring, the gland and the disc spring are all sleeved on the outer periphery of the screw;

[0007] The steel sealing ring comprises a steel sealing ring body, which is a cylindrical structure. A first expansion sealing ring, a polyurethane flexible sealing pad and a second expansion sealing ring are placed in the interior of the steel sealing ring body from bottom to top. The first expansion sealing ring, the polyurethane flexible sealing pad and the second expansion sealing ring are all sleeved on the periphery of the screw. The first expansion sealing ring abuts against the outer wall of the rod mill barrel, and the second expansion sealing ring abuts against the pressure cover.

[0008] The utility model is also characterized in that:

[0009] The steel sealing ring and the gland are clearance fit.

[0010] The disc spring is installed in a superimposed combination.

[0011] The outer diameters of the first expansion sealing ring, the polyurethane flexible sealing pad and the second expansion sealing ring are all 1 mm smaller than the inner diameter of the steel sealing ring body, and the sum of their thicknesses is equal to the height of the steel sealing ring body.

[0012] The first expansion seal ring and the second expansion seal ring are both made of natural elastic rubber rings.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses a rod mill cylinder sealing and leakproof device, which effectively seals the bolt holes of the cylinder by arranging a leakproof gasket on the screw between the rod mill cylinder and the nut, thereby solving the problem that the existing sealing structure cannot effectively seal the bolt holes of the cylinder; at the same time, the device utilizes the first expansion sealing ring and the second expansion sealing ring to fit and seal with the inner wall of the steel sealing ring body, thereby solving the problem that the existing sealing ring and the arc surface of the outer wall of the rod mill cylinder are not tightly fitted and cannot achieve sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the rod mill cylinder sealing and leak-proof device of the utility model;

[0016] Figure 2 The utility model is a structural schematic diagram of a steel sealing ring in a rod mill cylinder sealing and leak-proof device.

[0017] In the figure, 1. rod mill barrel, 2. liner, 3. screw, 4. nut, 5. steel sealing ring, 6. gland, 7. disc spring, 8. first expansion sealing ring, 9. polyurethane flexible sealing pad, 10. second expansion sealing ring. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0019] The utility model rod mill cylinder sealing and leak-proof device, such as Figure 1As shown, it is arranged on the rod mill cylinder 1, and a lining plate 2 is arranged inside the rod mill cylinder 1. The lining plate 2 is fixed to the inner wall of the rod mill cylinder 1 by leak-proof bolts. The leak-proof bolts include screw rods 3. The top of the screw rods 3 passes through the lining plate 2 and the rod mill cylinder 1 from the inside of the rod mill cylinder 1 to the outside in turn and is then locked by a nut 4. A leak-proof gasket is also arranged on the screw rod 3 between the rod mill cylinder 1 and the nut 4. The leak-proof gasket can prevent coal slurry leakage and effectively seal the bolt holes of the cylinder.

[0020] The leak-proof gasket includes a steel sealing ring 5, one end of which is welded to the outer wall of the rod mill cylinder 1, and the other end of the steel sealing ring 5 is sequentially provided with a pressure cap 6 and a disc spring 7. The steel sealing ring 5, the pressure cap 6 and the disc spring 7 are all sleeved on the outer periphery of the screw 3. The steel sealing ring 5 is welded to the surface of the rod mill cylinder 1 and forms a closed cavity with the pressure cap 4, which prevents the coal slurry from leaking through the bolt holes to the outside of the rod mill cylinder 1. After the disc spring 7 is added, when the liner 2 is squeezed, the force generated by the vibration of the liner 2 is borne by the disc spring 7, and the steel sealing ring 5 will not be loosened or damaged due to the large force caused by its vibration, and it also plays a role in protecting the screw 3 and the nut 4.

[0021] like Figure 2 As shown, the steel sealing ring 5 includes a steel sealing ring body, which is a cylindrical structure. The first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 are placed in sequence from bottom to top inside the steel sealing ring body. The polyurethane flexible sealing pad 9 is arranged so that the first expansion sealing ring 8 and the second expansion sealing ring 10 are not in direct contact, which plays a role of buffer protection. The first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 are all sleeved on the periphery of the screw 3, the first expansion sealing ring 8 abuts against the gland 6, and the second expansion sealing ring 10 abuts against the outer wall of the rod mill barrel 1. When the nut 4 is tightened, the gland 6 squeezes the first expansion sealing ring 8 and the second expansion sealing ring 10, and the first expansion sealing ring 8 and the second expansion sealing ring 10 are squeezed. After expansion, the expansion seal ring 8 and the second expansion seal ring 10 are fitted with the inner wall of the steel seal ring body. The first expansion seal ring 8 and the second expansion seal ring 10 are fitted and sealed with the inner wall of the steel seal ring body, thereby solving the problem that the existing seal ring and the arc surface of the outer wall of the rod mill cylinder 1 are not tightly fitted and cannot be sealed. At the same time, the pressure cover 6 is used to press the steel seal ring 5. During or after the tightening process, the first expansion seal ring 8 and the second expansion seal ring 10 in the steel seal ring 5 are always in the closed cavity. The first expansion seal ring 8 and the second expansion seal ring 10 will not escape and are not easily damaged, thereby playing a reliable sealing role and solving the problem that the existing sealing structure cannot effectively seal the bolt holes of the cylinder.

[0022] The outer diameters of the first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 are all 1mm smaller than the inner diameter of the steel sealing ring 5 body, which makes it easier to load and remove the expansion sealing ring. If the outer diameters are larger than 1mm, the expansion sealing ring and the steel sealing ring will not fit together and have no sealing effect. The sum of the thicknesses of the first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 is equal to the height of the steel sealing ring 5 body, which prevents the expansion sealing ring from overflowing when tightening the nut and seriously affecting the expansion effect of the sealing ring.

[0023] The first expansion seal ring 8 and the second expansion seal ring 10 are both made of natural elastic rubber rings.

[0024] The steel sealing ring 5 and the pressure cover 6 are clearance-fitted. When the liner is subjected to impact, the clearance-fitting does not affect the mutual action and can be self-adjusted.

[0025] The disc spring 7 is installed in a superimposed combination. The superimposed combination has friction damping on the superimposed surface, and the shock absorption and energy dissipation effects are more significant. The buffering and vibration absorption capacity is strong, and it can withstand large loads with small deformation.

[0026] The rod mill cylinder sealing and leak-proof device of the utility model has the following specific working principle: when in use, the top of the screw rod 3 passes through the liner plate 2 and the rod mill cylinder 1 from the inside of the rod mill cylinder 1 to the outside in turn, and is then locked by the nut 4. During the locking process of the nut 4, the gland 6 and the disc spring 7 are squeezed, and the gland 6 and the steel sealing ring 5 are clearance-matched, and a closed cavity is formed between the gland 6 and the steel sealing ring 5, which seals the bolt hole between the screw rod 3 and the rod mill cylinder 1. At the same time, the squeezing effect of the gland 6 causes the first expansion sealing ring 8 and the second expansion sealing ring 10 in the steel sealing ring 5 to expand and fit with the inner wall of the steel sealing ring body, further solving the problem that the screw rod 3 and the rod mill cylinder 1 are sealed. The problem that the existing sealing ring and the arc surface of the outer wall of the rod mill cylinder 1 are not tightly fitted and cannot be sealed is solved. The sealing of the bolt hole gap between the screw 3 and the rod mill cylinder 1 is strengthened, and the force generated by the vibration of the liner 2 is borne by the disc spring 7. The steel sealing ring 5 and the first expansion sealing ring 8, polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 inside it will not be loosened or damaged due to the large force caused by its vibration. The polyurethane flexible sealing pad 9 is arranged so that the first expansion sealing ring 8 and the second expansion sealing ring 10 are not in direct contact. The urethane flexible sealing pad 9 has good flexibility and a large expansion amount, which can make up for the expansion sealing ring that cannot fit a smaller gap and play a role of buffer protection.

[0027] Example 1

[0028] The rod mill cylinder sealing and leak-proof device of this embodiment is arranged on the rod mill cylinder 1. A liner 2 is arranged inside the rod mill cylinder 1. The liner 2 is fixed to the inner wall of the rod mill cylinder 1 by leak-proof bolts. The leak-proof bolts include a screw 3. The top of the screw 3 passes through the liner 2 and the rod mill cylinder 1 from the inside of the rod mill cylinder 1 to the outside in sequence and is then locked by a nut 4. A leak-proof gasket is also arranged on the screw 3 between the rod mill cylinder 1 and the nut 4.

[0029] Example 2

[0030] The rod mill cylinder sealing and leak-proof device of this embodiment is arranged on the rod mill cylinder 1. A liner 2 is arranged inside the rod mill cylinder 1. The liner 2 is fixed to the inner wall of the rod mill cylinder 1 by leak-proof bolts. The leak-proof bolts include a screw 3. The top of the screw 3 passes through the liner 2 and the rod mill cylinder 1 from the inside of the rod mill cylinder 1 to the outside in sequence and is then locked by a nut 4. A leak-proof gasket is also arranged on the screw 3 between the rod mill cylinder 1 and the nut 4.

[0031] The leak-proof gasket includes a steel sealing ring 5, one end of which is welded to the rod mill barrel 1, and the other end of the steel sealing ring 5 is sequentially provided with a pressure cover 6 and a disc spring 7 outwardly, and the steel sealing ring 5, the pressure cover 6 and the disc spring 7 are all sleeved on the outer periphery of the screw 3.

[0032] The steel sealing ring 5 and the pressure cover 6 are clearance-fitted.

[0033] The disc spring 7 is installed in a superimposed combination.

[0034] Example 3

[0035] The rod mill cylinder sealing and leak-proof device of this embodiment is arranged on the rod mill cylinder 1. A liner 2 is arranged inside the rod mill cylinder 1. The liner 2 is fixed to the inner wall of the rod mill cylinder 1 by leak-proof bolts. The leak-proof bolts include a screw 3. The top of the screw 3 passes through the liner 2 and the rod mill cylinder 1 from the inside of the rod mill cylinder 1 to the outside in sequence and is then locked by a nut 4. A leak-proof gasket is also arranged on the screw 3 between the rod mill cylinder 1 and the nut 4.

[0036] The leak-proof gasket includes a steel sealing ring 5, one end of which is welded to the rod mill barrel 1, and the other end of the steel sealing ring 5 is sequentially provided with a pressure cover 6 and a disc spring 7 outwardly, and the steel sealing ring 5, the pressure cover 6 and the disc spring 7 are all sleeved on the outer periphery of the screw 3.

[0037] The steel sealing ring 5 and the pressure cover 6 are clearance-fitted.

[0038] The disc spring 7 is installed in a superimposed combination.

[0039] The steel sealing ring 5 includes a steel sealing ring body, which is a cylindrical structure. The inside of the steel sealing ring body is sequentially arranged with a first expansion sealing ring 8, a polyurethane flexible sealing pad 9 and a second expansion sealing ring 10 from bottom to top. The first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 are all sleeved on the periphery of the screw 3. The first expansion sealing ring 8 abuts against the outer wall of the rod mill barrel 1, and the second expansion sealing ring 10 abuts against the pressure cover 6.

[0040] The outer diameters of the first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 are all 1 mm smaller than the inner diameter of the steel sealing ring 5 body, and the sum of the thicknesses of the first expansion sealing ring 8, the polyurethane flexible sealing pad 9 and the second expansion sealing ring 10 is equal to the height of the steel sealing ring 5 body.

[0041] The first expansion seal ring 8 and the second expansion seal ring 10 are both made of natural elastic rubber rings.

Claims

1. Rod mill cylinder sealing and leak-proof device, characterized in that: The rod mill cylinder (1) is provided with a lining plate (2) inside the rod mill cylinder (1), and the lining plate (2) is fixed to the inner wall of the rod mill cylinder (1) by means of leakproof bolts. The leakproof bolts include a screw rod (3), and the top of the screw rod (3) passes through the lining plate (2) and the rod mill cylinder (1) from the inside of the rod mill cylinder (1) to the outside in sequence, and is then locked by means of a nut (4). A leakproof gasket is also provided on the screw rod (3) between the rod mill cylinder (1) and the nut (4); The leak-proof gasket comprises a steel sealing ring (5), one end of which is welded to the rod mill barrel (1), and the other end of which is provided with a gland (6) and a disc spring (7) in sequence outwardly, and the steel sealing ring (5), the gland (6) and the disc spring (7) are all sleeved on the outer periphery of the screw rod (3); The steel sealing ring (5) comprises a steel sealing ring body, which is a cylindrical structure. A first expansion sealing ring (8), a polyurethane flexible sealing pad (9) and a second expansion sealing ring (10) are placed in sequence from bottom to top inside the steel sealing ring body. The first expansion sealing ring (8), the polyurethane flexible sealing pad (9) and the second expansion sealing ring (10) are all sleeved on the outer periphery of the screw (3). The first expansion sealing ring (8) abuts against the outer wall of the rod mill barrel (1), and the second expansion sealing ring (10) abuts against the gland (6).

2. The rod mill cylinder sealing and leak-proof device according to claim 1, characterized in that: The steel sealing ring (5) and the gland (6) are clearance-fitted.

3. The rod mill cylinder sealing and leak-proof device according to claim 1, characterized in that: The disc spring (7) is installed in a stacked combination.

4. The rod mill cylinder sealing and leak-proof device according to claim 1, characterized in that: The outer diameters of the first expansion sealing ring (8), the polyurethane flexible sealing pad (9) and the second expansion sealing ring (10) are all 1 mm smaller than the inner diameter of the steel sealing ring (5) body, and the sum of the thicknesses of the first expansion sealing ring (8), the polyurethane flexible sealing pad (9) and the second expansion sealing ring (10) is equal to the height of the steel sealing ring (5) body.

5. The sealing and leak-proof device for the rod mill barrel (1) according to claim 4, characterized in that: The first expansion sealing ring (8) and the second expansion sealing ring (10) are both made of natural elastic rubber rings.

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