JP3494811B2 - Oil supply / discharge device for thrust ring device of roll in rolling mill - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply / discharge device for a thrust ring device which receives a load in an axial direction of a roll bearing in a rolling mill. 2. Description of the Related Art FIG. 2 is a longitudinal sectional view showing a structure for attaching a thrust ring to a roll. One end face of the thrust ring is brought into contact with a bearing 3 in a chock 2 incorporated in the roll 1, and an annular carrier is formed around the roll. The ring 4 is arranged. In order to hold the bearing 3 by restraining the position of the carrier ring 4 in the axial direction, a thrust ring 5 that applies a restraining force to the carrier ring 4 in the axial direction is provided in connection with the carrier ring 4. The thrust ring 5 is provided with a plurality of thrust blocks 7 which can move in the radial direction of the roll 1 and can be dropped into a roll neck groove 6 formed in the roll 1. Thrust block 7 has thrust ring 5
Is fixed to the piston rod 9 of the cylinder 8 fixedly disposed at the position, and engages with or separates from the roll neck groove 6 by movement of the piston rod 9 due to supply and discharge of hydraulic oil. An annular cylinder bore 10 is formed on the thrust block side of the carrier ring 4, and an annular piston 11 which is movable in the roll axis direction and abuts on the thrust block 7 is provided in the cylinder bore. Pressurization and depressurization are performed using the coupler 12 and the gate valve 13. As the piston 11 advances, the thrust block 7 abuts against the inner peripheral surface of the roll neck groove 6, applies a restraining force to the carrier ring 4 in the axial direction, and presses and holds the bearing 3 (Japanese Patent Publication No. 7-3233).
09). [0005] In the above structure, the pressure filling operation into the cylinder bore is performed by pressurizing the gate valve with the gate valve open, and after the sealing, the gate valve is closed, and the pressure releasing operation is performed by moving the gate valve upward to remove the oil passage. To the outside and drain the hydraulic oil. [0006] However, in the above configuration, even when the gate valve is closed at the time of pressure sealing, some operators cannot completely close the gate valve, and the required sealing pressure cannot be secured. There may be cases. Also, when depressurizing, depending on the operator, it cannot be completely opened, it takes a lot of time to discharge, or the seal material is damaged by turning the screw of the gate valve too much, and the seal material is replaced each time There is a need. further,
The press-sealed surface requires rubbing, which is expensive. Accordingly, the present invention is to improve the press-sealing property, that is, the sealing property, to enhance the depressurizing workability, to prevent the seal material from being damaged due to erroneous work, and to perform a rolling process that does not require a rubbing process of the press-sealing surface. The present invention provides an oil supply and discharge device for a thrust ring of a roll in a machine. According to the present invention, an annular carrier ring is arranged around a roll by abutting one end against a bearing in a chock incorporated in the roll, and a thrust is connected to the carrier ring. A ring is provided, the thrust ring is provided with a plurality of thrust blocks that can be dropped into the roll neck groove by a cylinder, and an annular cylinder bore having an annular piston that abuts the thrust block is provided on the thrust block side of the carrier ring. In the oil supply / drainage device of a thrust ring device for a roll in a rolling mill that performs pressure filling and depressurization in a cylinder bore by using a coupler, a pressure filling check valve is incorporated in the middle of an oil passage leading to the cylinder, The check valve is provided with a valve body biased to the hydraulic oil supply and discharge port, and the pressure release pin is It is screwed into the screw hole almost to the surface of the valve head, the end stopper of the pressure release pin is provided at the upper part of the screw hole, and the stopper of the pressure release pin is provided at the lower part of the screw hole. I do. FIG. 1 shows an oil supply / discharge device according to the present invention in FIG.
Is a vertical cross-sectional view of one embodiment embedded in a hydraulic thrust ring device shown in FIG. 3, wherein the base end of the coupler 12 a is assembled to the carrier ring 4 so as to face the peripheral surface, and from the coupler 12 to the base end of the cylinder bore 10. An oil passage is formed.
In the middle of the oil passage, a pressure sealing check valve 14 is incorporated so as to be operable from outside. As the pressure-filled check valve 14, a commercially available check valve 14 having high-pressure sealability can be used to enhance the pressure-filling property. In this embodiment, a pressure-filled check valve 14 provided with a hemispherical valve body 18 supported by a plug 15 and urged by a spring 16 to a hydraulic oil supply / discharge port 17 is used. A pressure release pin 19 is screwed into the screw hole 20 to a position near the surface of the valve body head with the valve body 18 interposed therebetween, and the head 21 of the pressure release pin 19 is rotated up and down by rotating the pressure release pin 19. For this purpose, a hexagonal hole 22 for locking the wrench is formed, and a snap ring is provided as an end stopper 23 above the screw hole 20 of the pressure release pin 19. In order to regulate the stroke of the pressure release pin 19, the head of the pressure release pin 19 is raised to the end stopper 23, and a hemispherical valve body urged by the spring 16 to the hydraulic oil supply / discharge port 17. The contact of No. 18 is ensured to enhance the sealing performance. In order to prevent the pressure release pin 19 from being turned too much and the valve body 18 from being excessively pressed, the length of the screw portion of the screw hole 20 is set to a predetermined length, or the stopper of the pin head 21 such as a step Provide. Next, a method for pressurizing / releasing the cylinder bore by the oil supply / discharge device of the present invention will be described. 1) After the head 21 of the pressure sealing pressure release pin 19 is positioned on the snap ring portion which is the end stopper 23, the coupler 12b of the pressurizing unit is connected to the coupler 12a and set to a predetermined pressure. The hydraulic oil reaches the pressure-filled check valve 14 from the coupler through the oil passage, and at the pressure-filled check valve 14, the valve body 18 is pushed down by the hydraulic oil, and the hydraulic oil supply / discharge port 17 is opened.
The hydraulic oil passes through the oil passage from the gap formed between the hydraulic fluid and the valve element 18 and reaches the cylinder bore. When a predetermined pressure is reached, the valve element is pushed up by the spring 16 and closes the hydraulic oil supply / discharge port 17.
The pressure filling ends. 2) When the coupler 12b of the pressure unit is connected to the pressure release coupler 12a and the pressure release pin 19 is screwed to the stroke end, the valve body 18 is pushed down by the hydraulic oil in the pressure sealing check valve 14, and the hydraulic oil supply is performed. Hydraulic oil in the cylinder bore is drained out of the gap formed between the outlet 17 and the valve element 18. (1) In the present invention, the press-sealing property and the depressurizing operation are improved as compared with the conventional art, and the reliability of the check valve is improved because the check valves are interchangeable. (2) A commercially available check valve having a high pressure sealing property can be used to enhance the pressure sealing property. The sealing property can be maintained even if different workers are performed by performing the stroke end by loosening the pressure release pin to the end stopper. Can be unified. Also, when opening the valve body, instead of moving the pin equivalent to the gate valve in the conventional technology upward to open the oil passage to the outside, the stroke release is performed by moving the pressure release pin downward and pushing it to the limit of movement. Not only prevents erroneous work due to excessive turning, but also prevents seal damage,
Further, there is no difference in the degree of opening of the oil passage due to the difference between the operators, and the depressurizing operation can be completed in a fixed discharge time. (3) Since a commercially available check valve is used, it has a sealing property, so that it is not necessary to perform a rubbing process for each unit, and even if the check valve is damaged, it is compatible, so that it is always uniform. Can maintain the sealing property.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of one embodiment of an oil supply / discharge device of the present invention. FIG. 2 is a longitudinal sectional view showing a conventional structure for attaching a thrust ring to a roll. [Description of Signs] 1 Roll 2 Chock 3 Bearing 4 Carrier ring 5 Thrust ring 6 Roll neck groove 7 Thrust block 8 Cylinder 9 Piston rod 10 Cylinder bore 11 Piston 12, 12a Coupler 12b Pressure unit coupler 13 Gate valve 14 Pressure check Valve 15 Plug 16 Spring 17 Hydraulic oil supply / discharge port 18 Valve element 19 Pressure release pin 20 Screw hole 21 Head 22 Hexagon hole 23 End stopper

Continued on the front page (72) Inventor Minoru Kanamori 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu Nippon Steel Plant Design Co., Ltd. (56) References JP-A-7-323309 (JP, A) JP-A-7-96306 (JP, A) JP-A-6-292912 (JP, A) JP-A-55-92209 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 31/07 F16C 35 / 077

Claims (1)

(57) [Claims 1] An annular carrier ring is arranged around a roll by abutting one end against a bearing in a chock incorporated in the roll, and a thrust ring is connected to the carrier ring. The thrust ring is provided with a plurality of thrust blocks that can be dropped into the roll neck groove by a cylinder, and on the thrust block side of the carrier ring, an annular cylinder bore having an annular piston abutting on the thrust block is formed. In the oil supply / discharge system of the thrust ring device of the roll in a rolling mill that performs pressure filling and depressurization in the cylinder bore by using a coupler, a pressure filling check valve is incorporated in the middle of the oil passage leading to the cylinder to check the pressure filling. The valve is provided with a valve body biased to the hydraulic oil supply / discharge port, and a pressure release pin is provided near the surface of the valve body head. The thrust of a roll in a rolling mill, wherein an end stopper of a pressure release pin is provided at an upper part of the screw hole, and a stopper of a pressure release pin is provided at a lower part of the screw hole. Oil supply / drainage device for ring device.