Small square billet continuous casting machine fan-shaped section carrier roller device capable of effectively prolonging service life

Abstract

The utility model discloses a small square billet continuous casting machine fan-shaped section carrier roller device capable of effectively prolonging the service life, which comprises an outer side through cover, a bearing seat, an inner side through cover, a roller group, a rotating shaft lip type sealing ring FBI, a bearing, a rotating shaft lip type sealing ring FBII, a rotating joint, a fork type fixing piece and an external thread pipe joint, a roller cooling water cavity is formed in the roller group; a water inlet hole and a water outlet hole are respectively formed in two ends of a shaft of the roller group; the rotary joint is mounted on the bearing seat through the fork-shaped fixing piece; the bearings are connected with the two ends of a shaft of the roller set in a matched mode. An outer side through cover and an inner side through cover are respectively arranged on two end surfaces of the bearing seat; a rotating shaft lip-shaped sealing ring FBII is arranged between the outer side through cover and a shaft of the roller group; a rotating shaft lip-shaped sealing ring FBI is arranged between the inner side through cover and a shaft of the roller group; the side face of the bearing seat is provided with a cooling water channel, the middle is provided with a lubricating oil groove, and the bottom is provided with a lubricating oil hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and further belongs to the technical field of continuous casting cooling section equipment, and specifically relates to a fan-shaped section roller device for a small square billet continuous casting machine which has simple structure, reliable operation, easy operation and can effectively extend the service life. Background Art

[0002] In steel production, the smelted molten steel is poured through a continuous casting machine to form a steel billet, which is then processed into various steel products. In the continuous casting operation, the main function of the continuous casting machine is to convert the liquid molten steel into a solid casting billet. During the entire solidification process of the molten steel, cooling is required. The cooling is mainly divided into two parts: crystallizer cooling and secondary cooling. Crystallizer cooling refers to the solidification cooling of liquid molten steel in the copper tube of the closed crystallizer. This process solidifies about 10-20% of the molten steel, and about 80-90% of the molten steel has not yet solidified. After leaving the crystallizer, the casting billet solidifies into a thinner shell, and the inside is still high-temperature molten steel. In order to allow the continuous casting billet to continue to solidify, multiple water spraying areas, namely secondary cooling chambers, are set up within the length range from the crystallizer outlet to the straightening machine.

[0003] The roller device is an important equipment in the secondary cooling chamber sector of the arc continuous casting machine for small square billets. The working environment of the rollers in the secondary cooling chamber of continuous casting is harsh, with high temperature, water corrosion, heavy load, and easy wear of the roller surface. In the secondary cooling chamber, the rollers play the role of lifting and stabilizing the operation of the billets. During the working process, if the rollers are severely worn or the rollers do not rotate properly, it will have a serious impact on the billet drawing speed, billet quality, smooth production, etc., and may even cause steel overflow and leakage accidents. The current roller device has the following shortcomings:

[0004] 1. The bearing lubrication method is unreasonable and the lubrication effect is poor; the bearing selection is inappropriate, the sealing effect is poor, and water will enter the bearing; the through cover and the bearing seat are not tightly matched, and water will enter the bearing seat from the side of the through cover, causing the grease emulsification to fail.

[0005] 2. There is no cooling water passage inside the bearing seat, roller shaft and roller, and the cooling effect is poor. In a high-temperature working environment, the roller and roller shaft are greatly deformed, and the roller bearing is prone to locking failure at high temperatures.

[0006] 3. The roller body and roller shaft are made of ordinary steel, which has low strength and is not resistant to high temperatures.

[0007] Therefore, the key to solve this problem is to research and develop a billet continuous casting machine sector roller device which has a simple structure, reliable operation, and easy operation and can effectively extend the service life. Utility Model Content

[0008] The utility model aims to provide a sector-shaped roller device for a small square billet continuous casting machine which has the advantages of simple structure, reliable operation and easy operation and can effectively prolong the service life.

[0009] The purpose of the utility model is achieved by including an outer through cover, a bearing seat, an inner through cover, a roller group, a rotating shaft lip seal FBⅠ, a bearing, a rotating shaft lip seal FBⅡ, a rotary joint, a fork-shaped fixing piece, and an external threaded pipe joint. The roller group is provided with one bearing seat at each end; a roller cooling water chamber is provided inside the roller group; a water inlet hole and a water outlet hole are provided at each end of the shaft of the roller group; a rotary joint is provided at the water inlet hole of the roller group; the rotary joint is installed on the bearing seat through a fork-shaped fixing piece; the A bearing is arranged inside the bearing seat; the bearing is connected to the two ends of the shaft of the roller group; an outer cover and an inner cover are arranged on the two end surfaces of the bearing seat respectively; a rotating shaft lip seal ring FBⅡ is arranged between the outer cover and the shaft of the roller group; a rotating shaft lip seal ring FBⅠ is arranged between the inner cover (3) and the shaft of the roller group; a cooling water channel is arranged on the side of the bearing seat, a lubricating oil groove is arranged in the middle, and a lubricating oil hole is arranged at the bottom; one external threaded pipe joint is arranged on each side of the cooling water channel of the bearing seat.

[0010] The utility model is composed of an outer through cover, a bearing seat, an inner through cover, a roller group, a rotating shaft lip seal ring FBⅠ, a bearing, a rotating shaft lip seal ring FBⅡ, a rotary joint, a fork-shaped fixing piece, and an external threaded pipe joint; the bearing lubrication adopts the oil supply method at the bottom of the bearing seat, a lubricating oil groove is opened in the middle of the bearing seat, and a lubricating oil hole is arranged at the bottom. The lubricating oil enters the lubricating oil groove from the bottom of the bearing seat and then enters the inside of the bearing through the three lubricating holes of the outer ring of the bearing. Since the inner ring of the bearing seat and the outer ring of the bearing are interference fit, the lubricating oil is effectively avoided from being contaminated by water due to oil entering from the bearing seat through cover or other parts of the bearing seat. The lubricating pipeline at the bottom of the bearing seat also effectively prevents the burning of the lubricating pipeline by the steel liquid in the event of a steel leakage accident. The bearing adopts a high-temperature resistant fluororubber sealed bearing, which can minimize the entry of water into the bearing; the inner seals of the two inner sides of the bearing seat through cover adopt a high-temperature resistant fluororubber rotating shaft lip seal, which can better prevent water from entering the bearing seat than the general bearing seat using an O-ring seal. The cover and the bearing seat are connected by an annular sealing groove and an annular sealing boss, which is similar to the labyrinth structure design, which can prevent water from entering the bearing seat from the side of the cover and prevent the emulsification failure of the grease. The unique structural design in the above three aspects can effectively ensure the purity of the grease inside the bearing, so that the bearing can maintain effective lubrication for a long time, and extend the service life of the bearing. The service life of the bearing is increased by more than 50% compared with the service life of other rollers of the same type.

[0011] Cooling water channels are designed inside the bearing seat, shaft and roller, and water is passed through each part for cooling, which has a good cooling effect; the roller and shaft have small deformation, and the bearing will not have locking failure; the water supply rotary joint adopts a one-way flow rotary joint, and the return water is directly discharged from the other end of the shaft, which can more intuitively show whether the water channel is unobstructed and whether the cooling is good.

[0012] The roller body and shaft are made of high-strength alloy structural steel, which has the characteristics of high temperature resistance and high strength; the roller surface is welded with 5mm wear-resistant cobalt-based welding rods, and heat treated and finished, which can effectively improve the service life of the support rollers.

[0013] The utility model has the advantages of simple structure, reliable operation and convenient operation and can effectively prolong the service life of the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 for Figure 1 The left side schematic diagram;

[0016] Figure 3 This is a schematic diagram of the bearing seat of the utility model;

[0017] Figure 4 for Figure 3 The left side schematic diagram;

[0018] Figure 5 It is a schematic diagram of the roller assembly of the utility model;

[0019] Figure 6 This is a schematic diagram of the outer through cover of the utility model;

[0020] Figure 7 It is a schematic diagram of the inner through cover of the utility model.

[0021] In the figure: 1-outer cover, 101-outer cover body, 102-annular sealing boss Ⅰ, 2-bearing seat, 21-bearing seat body, 22-cover plate, 23-cooling water channel, 24-annular sealing groove, 25-lubricating oil groove, 26-lubricating oil hole, 27-internal pipe thread Ⅰ, 3-inner cover, 301-inner cover body, 302-annular sealing boss Ⅱ, 4-roller group, 41-shaft, 42 -roller, 43-wear-resistant layer, 44-roller cooling water chamber, 45-water inlet hole, 46-internal pipe thread II, 47-water outlet hole, 5-rotating shaft lip seal FBⅠ, 6-bearing, 7-rotating shaft lip seal FBⅡ, 8-rotating joint, 9-fork-type fixing part, 10-external threaded pipe joint, 11-water inlet pipe I, 12-water outlet pipe I, 13-lubricating oil pipe, 14-water inlet pipe II, 15-water outlet pipe II. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes made based on the teachings of the present invention fall within the protection scope of the present invention.

[0023] like Figures 1 to 7 As shown, the utility model comprises an outer through cover 1, a bearing seat 2, an inner through cover 3, a roller group 4, a rotating shaft lip seal FBⅠ5, a bearing 6, a rotating shaft lip seal FBⅡ7, a rotary joint 8, a fork-shaped fixing piece 9, and an external threaded pipe joint 10. The roller group 4 is provided with one bearing seat 2 at both ends; a roller cooling water cavity is provided inside the roller group 4; a water inlet hole and a water outlet hole are provided at both ends of the shaft of the roller group 4; a rotary joint 8 is provided at the water inlet hole of the roller group 4; the rotary joint 8 is installed on the bearing seat 2 through the fork-shaped fixing piece 9; the A bearing 6 is arranged inside the bearing seat 2; the bearing 6 is matched and connected with both ends of the shaft of the roller group 4; an outer through cover 1 and an inner through cover 3 are respectively arranged on the two end surfaces of the bearing seat 2; a rotating shaft lip-type sealing ring FBⅡ7 is arranged between the outer through cover 1 and the shaft of the roller group 4; a rotating shaft lip-type sealing ring FBⅠ5 is arranged between the inner through cover 3 and the shaft of the roller group 4; a cooling water channel is arranged on the side of the bearing seat 2, a lubricating oil groove is arranged in the middle, and a lubricating oil hole is arranged at the bottom; one external threaded pipe joint 10 is arranged on each side of the cooling water channel of the bearing seat 2.

[0024] The outer through cover 1 comprises an outer through cover body 101 and an annular sealing boss Ⅰ102 ; an annular sealing boss Ⅰ102 is arranged on the outer circumferential end surface of the outer through cover body 101 .

[0025] The inner through cover 3 comprises an inner through cover body 301 and an annular sealing boss II 302 ; an annular sealing boss II 302 is arranged on the outer circumferential end surface of the inner through cover body 301 .

[0026] The bearing seat 2 includes a bearing seat body 21, a cover plate 22, a cooling water channel 23, an annular sealing groove 24, a lubricating oil groove 25, a lubricating oil hole 26, and an internal pipe thread Ⅰ27; a cooling water channel 23 is arranged on the side of the bearing seat body 21; a cover plate 22 is arranged on the outer end surface of the cooling water channel 23; annular sealing grooves 24 are respectively arranged on the two end surfaces of the bearing seat body 21; a lubricating oil groove 25 is arranged in the middle of the inner hole of the bearing seat body 21; a lubricating oil hole 26 is arranged at the bottom of the bearing seat body 21; an internal pipe thread Ⅰ27 is arranged at the oil inlet end of the lubricating oil hole 26.

[0027] The annular sealing groove 24 is assembled with the annular sealing boss Ⅰ102 and the annular sealing boss Ⅱ302 respectively.

[0028] The roller group 4 includes a shaft 41, a roller 42, a wear-resistant layer 43, a roller cooling water chamber 44, a water inlet hole 45, an internal pipe thread II 46, and a water outlet hole 47; the shaft 41 is arranged at the center of the roller 42; the wear-resistant layer 43 is arranged on the roller surface of the roller 42, and the roller cooling water chamber 44 is arranged in the middle of the roller 42; the water inlet hole 45 is arranged at the right end of the shaft 41, and the water outlet hole 47 is arranged at the left end; the internal pipe thread II 46 is arranged at the inlet of the water inlet hole 45.

[0029] The material of the shaft 41 is 42CrMo; the material of the roller 42 is ZG42CrMo.

[0030] The wear-resistant layer 43 is a cobalt-based alloy welding rod cladding layer with a thickness of 5 mm and a hardness of HRC>40, and must not have cracks or fall off.

[0031] The rotating shaft lip seal ring FBⅠ5 and the rotating shaft lip seal ring FBⅡ7 are high temperature resistant fluororubber rotating shaft lip seals.

[0032] The bearing 6 is a high temperature resistant fluororubber sealed bearing.

[0033] The working principle and working process of this utility model:

[0034] The utility model is composed of an outer through cover 1, a bearing seat 2, an inner through cover 3, a roller group 4, a rotating shaft lip-shaped sealing ring FBⅠ5, a bearing 6, a rotating shaft lip-shaped sealing ring FBⅡ7, a rotary joint 8, a fork-shaped fixing piece 9, and an external threaded pipe joint 10. The bearing 6 is lubricated by adopting an oil supply method at the bottom of the bearing seat 2. A lubricating oil groove 25 is opened in the middle of the bearing seat 2, and a lubricating oil hole 26 is arranged at the bottom. The lubricating oil enters the lubricating oil groove 25 from the bottom of the bearing seat 2 and then enters the inside of the bearing 6 through three lubricating holes on the outer ring of the bearing 6. Since the inner ring of the bearing seat 2 and the outer ring of the bearing 6 are interference fit, the lubricating oil is effectively avoided from being contaminated by water due to oil entering from the through cover of the bearing seat 2 or other parts of the bearing seat 2. The lubricating pipeline at the lower part of the bearing seat 2 also effectively prevents the burning of the lubricating pipeline by molten steel when a steel leakage accident occurs. The bearing 6 uses a high-temperature resistant fluororubber sealed bearing, which can minimize the entry of water into the bearing 6; the inner seals of the bearing seat 2 cover use high-temperature resistant fluororubber rotating shaft lip seals, which can better prevent water from entering the bearing seat 2 than the general bearing seat 2 using an O-ring seal. The cover and the bearing seat 2 are connected by an annular sealing groove and an annular sealing boss, which is similar to the labyrinth ring structure design, which can prevent water from entering the bearing seat 2 from the side of the cover and prevent the emulsification failure of the grease. The unique structural design of the above three aspects can effectively ensure the purity of the grease inside the bearing 6, so that the bearing 6 can maintain effective lubrication for a long time, extend the service life of the bearing 6, and the service life of the bearing 6 is increased by more than 50% compared with the service life of the bearing 6 of other rollers of the same type.

[0035] Cooling water channels are designed inside the bearing seat 2, shaft 41 and roller 42, and water is passed through each part for cooling, resulting in a good cooling effect; the roller 42 and shaft 41 have little deformation, and the bearing 6 will not have a locking failure; the water supply rotary joint 8 adopts a one-way flow rotary joint, and the return water is directly discharged from the other end of the shaft 41, so that it can be more intuitive to see whether the water channel is unobstructed and whether the cooling is good.

[0036] The roller 42 body and the shaft 41 are made of high-strength alloy structural steel, which has the characteristics of high temperature resistance and high strength; the roller surface is clad with 5mm wear-resistant cobalt-based cladding electrodes, and is heat-treated and finely processed, which can effectively improve the service life of the support roller.

Claims

1. A billet continuous casting machine sector roller device capable of effectively extending service life, comprising an outer through cover (1), a bearing seat (2), an inner through cover (3), a roller assembly (4), a rotating shaft lip seal ring FBⅠ (5), a bearing (6), a rotating shaft lip seal ring FBⅡ (7), a rotating joint (8), a fork-shaped fixing member (9), and an external threaded pipe joint (10), wherein: A bearing seat (2) is provided at each end of the roller assembly (4); a roller cooling water chamber is provided inside the roller assembly (4); a water inlet hole and a water outlet hole are provided at each end of the shaft of the roller assembly (4); a rotary joint (8) is provided at the water inlet hole of the roller assembly (4); the rotary joint (8) is mounted on the bearing seat (2) via a fork-shaped fixing member (9); a bearing (6) is provided inside the bearing seat (2); the bearing (6) is cooperatively connected to the two ends of the shaft of the roller assembly (4); the bearing seat An outer through cover (1) and an inner through cover (3) are respectively arranged on the two end surfaces of the bearing seat (2); a rotating shaft lip seal ring FBⅡ (7) is arranged between the outer through cover (1) and the axis of the roller group (4); a rotating shaft lip seal ring FBⅠ (5) is arranged between the inner through cover (3) and the axis of the roller group (4); a cooling water channel is arranged on the side of the bearing seat (2), a lubricating oil groove is arranged in the middle, and a lubricating oil hole is arranged at the bottom; one external threaded pipe joint (10) is respectively arranged on both sides of the cooling water channel of the bearing seat (2).

2. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1 is characterized in that: The outer through cover (1) comprises an outer through cover body (101) and an annular sealing boss I (102); the annular sealing boss I (102) is arranged on the outer circular end surface of the outer through cover body (101).

3. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1 is characterized in that: The inner through cover (3) comprises an inner through cover body (301) and an annular sealing boss II (302); the annular sealing boss II (302) is arranged on the outer circular end surface of the inner through cover body (301).

4. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1 is characterized in that: The bearing seat (2) comprises a bearing seat body (21), a cover plate (22), a cooling water channel (23), an annular sealing groove (24), a lubricating oil groove (25), a lubricating oil hole (26), and an internal pipe thread I (27); a cooling water channel (23) is arranged on the side surface of the bearing seat body (21); a cover plate (22) is arranged on the outer end surface of the cooling water channel (23); annular sealing grooves (24) are arranged on both end surfaces of the bearing seat body (21); a lubricating oil groove (25) is arranged in the middle of the inner hole of the bearing seat body (21); a lubricating oil hole (26) is arranged at the bottom of the bearing seat body (21); and an internal pipe thread I (27) is arranged at the oil inlet end of the lubricating oil hole (26).

5. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 4 is characterized in that: The annular sealing groove (24) is assembled with the annular sealing boss I (102) and the annular sealing boss II (302) respectively.

6. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1 is characterized in that: The roller assembly (4) comprises a shaft (41), a roller (42), a wear-resistant layer (43), a roller cooling water chamber (44), a water inlet hole (45), an internal pipe thread II (46), and a water outlet hole (47); the shaft (41) is arranged at the center of the roller (42); the wear-resistant layer (43) is arranged on the roller surface of the roller (42), and the roller cooling water chamber (44) is arranged in the middle of the roller (42); the water inlet hole (45) is arranged at the right end of the shaft (41), and the water outlet hole (47) is arranged at the left end; and the internal pipe thread II (46) is arranged at the inlet of the water inlet hole (45).

7. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 6 is characterized in that: The material of the shaft (41) is 42CrMo; the material of the roller (42) is ZG42CrMo.

8. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 6 is characterized in that: The wear-resistant layer (43) is a cobalt-based alloy welding rod cladding layer, the cladding layer has a thickness of 5 mm, a hardness HRC>40, and must not have cracks or fall off.

9. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1, characterized in that: The rotating shaft lip seal ring FBⅠ (5) and the rotating shaft lip seal ring FBⅡ (7) are high temperature resistant fluororubber rotating shaft lip seals.

10. The billet continuous casting machine sector roller device capable of effectively extending the service life according to claim 1, characterized in that: The bearing (6) is a high temperature resistant fluororubber sealed bearing.

Images