Loop roller with good waterproof performance

Abstract

The utility model discloses a looper roller with good waterproof performance, which comprises a roller in the middle and shaft head components at the left end and the right end, and each shaft head component comprises a transmission shaft, a protective cover, a distance ring, a sealing component, a bearing seat, a bearing and a transparent cover; the outer circle of one end of the transmission shaft is sequentially matched with the transparent cover, the bearing and the distance ring from outside to inside, and the other end is matched with an inner hole in the end face of the roller; an inner hole of the bearing seat is matched with the bearing; two ends of the bearing seat are respectively connected with the transparent cover and the protective cover; the protective cover is divided into two sections, one section is sleeved outside the distance ring, a sealing assembly is arranged between the distance ring and the distance ring in the radial direction, and the other section is sleeved outside the transmission shaft and extends into the hole of the roller. The loop roller can well prevent condensate water from entering the inner hole of the roller cylinder and flowing to the seal and the bearing through the outer circle of the transmission shaft, so that the amount of water which can flow into the shaft cylinder and enters the seal through the transmission shaft is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a looper roller used in a finishing rolling area of ​​a steel billet production line of a steel enterprise. Background Art

[0002] The overall structure of the looper roller consists of the roller body (roller and transmission shafts at both ends), two bearing seats, two protective covers, two distance rings, two transparent covers, a water outlet pipe and standard parts for assembly, as well as a water inlet pipe connected to the site. The function of the looper roller is to transport the rolled steel billet through the rotation of the roller body. The bearing seat, protective cover, transparent cover and water outlet pipe do not rotate.

[0003] The working conditions of the looper roller are relatively bad: cooling water enters the roller body through the water inlet and flows out through the water outlet for cooling, the surrounding environment temperature is high, and condensed water is sprayed on it. Because a lot of condensed water remains on the surface of the roller, and each part will be slightly deformed during use, the accumulated water will slowly seep in from the gaps between the matching surfaces of each part, affecting the service life of the roller. The most critical part is the bearing. The bearing will generate a lot of heat during high-speed rotation. Once the condensed water comes into contact with the hot bearing, the service life of the bearing will be greatly reduced, and the bearing will be seriously corroded, causing the bearing to rust, making it more and more difficult to rotate until it is locked, so that the roller cannot rotate, affecting the normal transportation of the billet, resulting in quality problems of the billet, and generating a large amount of scrap steel, causing huge losses to the steel plant.

[0004] The structure of the existing looper roller is as follows: Figure 1 As shown, the reasons for water seepage are analyzed as follows: 1. The protective cover does not completely cover the area of ​​the transmission shaft outside the roller, so a large amount of condensed water falling from above will pass through this area and accumulate in the root area of ​​the transmission shaft head and flow to both sides. Once the amount of water is too large, the gathered condensed water will easily pass over the small platform of the distance ring to the seal, causing a small amount of condensed water to enter the shaft head assembly and affect the bearing; 2. O-rings are set on the end faces of the protective cover and the transparent cover that contact the bearing seat, that is, O-rings are set in the vertical direction. The disadvantages are: 1. The space there is small, the distance between the O-ring and the through hole for installing the bolts is too close, and it is easy to deform when the force is large, resulting in the bearing 1. The seat is not firmly fixed and becomes loose, which will greatly affect the sealing of the O-ring; 2. The vertical direction is affected by gravity. In addition, after a long working time, if the specifications of the O-ring and the size of the opening groove are slightly mismatched, the possibility of water seepage will be increased; 3. There is a single seal between the protective cover and the distance ring, and the prevention effect is poor; 4. The water outlet pipe at the water outlet is a vertical pipe in the horizontal direction and vertically downward. When the water volume at the water inlet is increased by rapidly cooling down to prevent overheating of the roller body, the water volume at the water outlet is large, and it will directly hit the wall of the water outlet pipe. Some water will flow back through the pipe wall. Although there is a seal, water will enter from the gap at the connection between the cover and the drive shaft. Summary of the invention

[0005] The problem to be solved by the utility model is to provide a looper roller with good waterproof performance, which can well prevent condensed water from entering the inner hole of the roller and flowing to the seal and bearing through the outer circle of the transmission shaft, so that the amount of water that can flow into the shaft cylinder and enter the seal through the transmission shaft is greatly reduced. At the same time, it can well prevent water from seeping from the gap between the mating surfaces of the transparent cover, the protective cover and the bearing seat. In addition, the double seals in the looper roller play a double protection effect.

[0006] The utility model discloses a loose roller with good waterproof performance, which comprises a roller in the middle and shaft head components at left and right ends, each shaft head component comprises a transmission shaft, a protective cover, a distance ring, a sealing component, a bearing seat, a bearing and a transparent cover; the outer circle of one end of the transmission shaft matches with the transparent cover, the bearing and the distance ring in sequence from the outside to the inside, and the other end matches with the inner hole of the roller end face; the inner hole of the bearing seat matches with the bearing, and its two ends are respectively connected with the transparent cover and the protective cover; the protective cover is divided into two sections, one section is sleeved on the outside of the distance ring, a sealing component is arranged between the two radially, and the other section is sleeved on the outside of the transmission shaft and extends into the hole of the roller.

[0007] Furthermore, the outer circle of the protective cover extending into the roller hole is a conical surface, which gradually becomes larger near the outer circle of the roller.

[0008] Furthermore, the cone angle of the protective cover is preferably a small angle of 3°.

[0009] Furthermore, the end of the protective cover located in the roller hole protrudes outward to form a high platform.

[0010] Furthermore, the looper roller also includes two left and right O-rings, which are arranged on the outer circles of the transparent cover and the protective cover that cooperate with the bearing seat.

[0011] Furthermore, the sealing assembly is a double seal, and the lips of the two seals are in a back-to-back direction.

[0012] Further, the lip of the seal close to the bearing faces the bearing, and the lip of the seal far from the bearing faces away from the bearing.

[0013] Furthermore, the looper roller also includes a water outlet pipe, which consists of two sections: a horizontal section and an inclined section.

[0014] Furthermore, the inclination angle of the inclined section is preferably a large inclination angle of 150°.

[0015] The advantages of the loose-loop roller of the utility model are as follows: 1. The protective cover has been structurally improved: the length is increased to extend into the inner hole of the roller, so that the condensed water above is blocked by the protective cover and will not fall onto the transmission shaft; the outer circle of the section extending into the roller hole is a conical surface, which gradually becomes larger close to the outer circle of the roller, so that the condensed water falling on the outer circle of the protective cover will not flow toward the roller; the end portion located in the roller hole protrudes outward to form a high platform, so that even a small part of the condensed water entering the roller will be further blocked by the high platform; 2. The left and right O-rings are arranged in the horizontal direction, which can well prevent water from seeping from the gap between the mating surfaces of the transparent cover, the protective cover and the bearing seat; 3. The double seal has a double protection effect; 4. The outlet pipe is combined with the horizontal section and the inclined section, so that almost all the cooling water flows out along the pipe wall, and even the water that does not flow away will be blocked by the seal between the outlet pipe and the transparent cover.

[0016] In short, the utility model looper roller can effectively prevent condensed water from penetrating from the gaps between the matching surfaces of various parts, protect the shaft head assembly, especially ensure the quality of the bearing, extend the service life of the roller, and ensure the normal production of the steel plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing looper roller in the background technology;

[0018] Figure 2 It is a structural schematic diagram of the utility model looper roller;

[0019] Figure 3 yes Figure 2 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0020] Example 1

[0021] from Figure 2 , Figure 3 It can be seen that the utility model is a kind of loose roller with good waterproof performance, which includes a middle roller 1 and shaft head components at both ends, each shaft head component includes a transmission shaft 2, a protective cover 3, a distance ring 4, a sealing component 5, a bearing seat 6, a bearing 7, and a transparent cover 9; the outer circle of one end of the transmission shaft 2 is matched with the transparent cover 9, the bearing 7, and the distance ring 4 in sequence from the outside to the inside, and the other end is matched with the inner hole of the end face of the roller 1; the inner hole of the bearing seat 6 is matched with the bearing 7, and its two ends are respectively connected with the transparent cover 9 and the protective cover 3; the protective cover 3 is divided into two sections, one section is sleeved on the outside of the distance ring 4, and a sealing component 5 is arranged radially between the two, and the other section is sleeved on the outside of the transmission shaft 2 and extends into the hole of the roller 1.

[0022] Since the location of the protective cover 3 is the area with the most condensed water and the area most prone to water seepage, the utility model looper roller increases the length of the protective cover 3 so that it extends into the inner hole of the roller 1, so that the condensed water above is blocked by the protective cover 3 and does not fall on the transmission shaft 2, thereby preventing the condensed water from flowing along the outer circle of the transmission shaft 2 to the seal 5 and the bearing 7. Among them, the bearing seat 6 is fixed on the finishing mill through two lifting ears.

[0023] Example 2

[0024] from Figure 2 , Figure 3 It can be seen that the utility model has a good waterproof performance of the looper roller: the outer circle of the protective cover 3 extending into the hole of the roller 1 is a conical surface, which gradually becomes larger near the outer circle of the roller.

[0025] The cone angle of the protective cover 3 is preferably a small angle of 3°.

[0026] The protective cover 3 is provided with a conical surface so that the condensed water falling on the outer circle of this section of the protective cover 3 will not flow toward the roller 1, thereby preventing the condensed water from entering the inner hole of the roller 1 and flowing toward the seal 5 and the bearing 7 through the outer circle of the transmission shaft 2.

[0027] Example 3

[0028] from Figure 2 , Figure 3 It can be seen that the utility model has a good waterproof performance of the looper roller: the end of the protective cover 3 located in the hole of the roller 1 is protruded outward to form a high platform.

[0029] A high platform is provided on the end surface of the protective cover 3, so that even if a small amount of condensed water enters the roller 1, it will be further blocked by the high platform, thereby preventing the condensed water from entering the inner hole of the roller 1 and flowing to the seal and bearing through the outer circle of the transmission shaft 2. Therefore, the protective cover 3 greatly reduces the amount of water that can flow into the shaft cylinder 1 and enter the seal 5 through the transmission shaft 2.

[0030] Example 4

[0031] from Figure 2 , Figure 3 It can be known that the utility model has a good waterproof performance of the looper roller: it also includes two left and right O-rings 8, and the O-rings 8 are arranged on the outer circles of the transparent cover 9 and the protective cover 3 and the bearing seat 6.

[0032] Left and right O-rings 8 are arranged on the outer circles of the transparent cover 9 and the protective cover 3, that is, the O-rings 8 are arranged in the horizontal direction, which will not interfere with other parts and affect the assembly, and the positioning is reliable, and will not shift after being used for a period of time. Therefore, the O-ring 8 has good sealing performance and can well prevent water from seeping through the gaps between the mating surfaces of the transparent cover 9, the protective cover 3 and the bearing seat 6.

[0033] Example 5

[0034] from Figure 2 , Figure 3 It can be seen that the utility model has a good waterproof performance of the looper roller: the sealing component 5 is a double seal, and the lips of the two seals are in the form of back-to-back directions.

[0035] Specifically: in the double seal: the lip of the seal close to the bearing faces the bearing, and the lip of the seal far from the bearing faces away from the bearing.

[0036] Bearing lubrication is usually divided into two categories: oil-gas lubrication and dry oil lubrication, which will cause the internal pressure to be greater than the external pressure. The grease will press the sealing lip close to the bearing downward, making the sealing better; the pressure of the external water will press the sealing lip away from the bearing downward, so even if a small amount of water seeps in, it will be blocked by the seal inside, achieving a double protection effect.

[0037] Example 6

[0038] from Figure 2 It can be seen that the utility model has a good waterproof performance of the looper roller: it also includes a water outlet pipe 10, the water outlet pipe 10 is composed of a horizontal section and an inclined section.

[0039] The inclination angle of the inclined section is preferably a large angle of 150°.

[0040] The outlet pipe 10 is a combination of a horizontal section and an inclined section, so that almost all the cooling water flows out along the pipe wall after coming out of the water outlet. Even if there is a small amount of water that does not flow away, it will be blocked by the seal between the outlet pipe 10 and the transparent cover 9, thereby achieving double protection and reducing the possibility of water ingress.

[0041] The advantages of the loose-loop roller of the utility model are as follows: 1. The protective cover has been structurally improved: the length is increased to extend into the inner hole of the roller, so that the condensed water above is blocked by the protective cover and will not fall onto the transmission shaft; the outer circle of the section extending into the roller hole is a conical surface, which gradually becomes larger close to the outer circle of the roller, so that the condensed water falling on the outer circle of the protective cover will not flow toward the roller; the end portion located in the roller hole protrudes outward to form a high platform, so that even a small part of the condensed water entering the roller will be further blocked by the high platform; 2. The left and right O-rings are arranged in the horizontal direction, which can well prevent water from seeping from the gap between the mating surfaces of the transparent cover, the protective cover and the bearing seat; 3. The double seal has a double protection effect; 4. The outlet pipe is combined with the horizontal section and the inclined section, so that almost all the cooling water flows out along the pipe wall, and even the water that does not flow away will be blocked by the seal between the outlet pipe and the transparent cover.

[0042] In short, the utility model looper roller can effectively prevent condensed water from penetrating from the gaps between the matching surfaces of various parts, protect the shaft head assembly, especially ensure the quality of the bearing, extend the service life of the roller, and ensure the normal production of the steel plant.

Claims

1. A looper roller with good waterproof performance, characterized by: It comprises a roller (1) in the middle and shaft head assemblies at the left and right ends. Each shaft head assembly comprises a transmission shaft (2), a protective cover (3), a distance ring (4), a sealing assembly (5), a bearing seat (6), a bearing (7), and a transparent cover (9). The outer circle of one end of the transmission shaft (2) matches with the transparent cover (9), the bearing (7), and the distance ring (4) in sequence from the outside to the inside, and the other end matches with the inner hole of the end face of the roller (1). The inner hole of the bearing seat (6) matches with the bearing (7), and its two ends are respectively connected with the transparent cover (9) and the protective cover (3). The protective cover (3) is divided into two sections, one section is sleeved on the outside of the distance ring (4), and a sealing assembly (5) is arranged between the two sections in the radial direction, and the other section is sleeved on the outside of the transmission shaft (2) and extends into the hole of the roller (1).

2. The looper roller according to claim 1, characterized in that: The outer circle of the protective cover (3) extending into the hole of the roller (1) is a conical surface, which gradually becomes larger near the outer circle of the roller.

3. The looper roller according to claim 2, characterized in that: The cone angle of the protective cover (3) is a small angle of 3°.

4. The looper roller according to claim 2 is characterized in that: The end of the protective cover (3) located in the hole of the roller (1) protrudes outward to form a high platform.

5. The looper roller according to claim 2, characterized in that: It also includes two left and right O-rings (8), which are arranged on the outer circles of the transparent cover (9) and the protective cover (3) that match the bearing seat (6).

6. The looper roller according to claim 2, characterized in that: The sealing component (5) is a double seal, and the lips of the two seals are in a back-to-back direction.

7. The looper roller according to claim 6 is characterized in that: The lip of the seal close to the bearing faces the bearing, and the lip of the seal far from the bearing faces away from the bearing.

8. The looper roller according to claim 2, characterized in that: It also comprises a water outlet pipe (10), which consists of two sections: a horizontal section and an inclined section.

9. The looper roller according to claim 8, characterized in that: The inclination angle of the inclined section is a large inclination angle of 150°.

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