JPH105829A - Oil supplying and draining device for thrust ring device of roll in rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil supplying/draining device for thrust rings of roll in a rolling mill with which pressure sealing property, i.e., sealing property is raised, also pressure releasing operability is elevated, the damage of a seal material by wrong operation is prevented and the fitting work of a pressure sealing surface is unnecessitated. SOLUTION: In the oil supplying/draining device for the thrust ring of roll in the rolling mill, a pressure sealing check valve 14 is incorporated in midway of the oil path which is communicated with a cylinder. In the pressure sealing check valve 14, an energized valve element 18 is provided in a hydraulic oil feed/drain port 17, a pressure releasepin 19 is screwed into a tapped hole 20 to the vicinity of the surface of the head part 21 of the valve element, the end stopper 23 of the pressure release pin 19 is provided in the upper part of the tapped hole 20 and the stopper of the pressure release pin 19 is provided in the lower part of the tapped hole 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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 the axial direction of a roller bearing in a rolling mill.

[0002]

2. Description of the Related Art FIG. 2 is a longitudinal sectional view showing a mounting structure of a thrust ring to a roll. One end face of the thrust ring is brought into contact with a bearing 3 in a choke 2 incorporated in the roll 1, and an annular carrier ring 4 is formed around the roll. Be placed. 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. The thrust block 7 has a 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 movable in the roll axis direction and abutting 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 sealing operation in the cylinder bore is performed by pressure-sealing the gate valve in an open state, and after sealing, the gate valve is closed. In the pressure releasing operation, the gate valve is moved upward to move the oil passage. To the outside and drain the hydraulic oil.

[0006]

However, in the above structure, even when the gate valve is closed at the time of pressure filling, some operators may not be able to completely close the gate valve, and the required filling pressure may not be secured. sell. Also, when depressurizing, some operators cannot completely open it, it takes a lot of time to discharge, or the sealing material is damaged by turning the gate valve screw too much, and the sealing material is replaced each time There is a need. further,
The press-sealed surface requires rubbing, which is expensive.

Therefore, 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 reduce the need for rubbing the press-sealing surface. The present invention provides an oil supply and discharge device for a thrust ring of a roll in a machine.

[0008]

SUMMARY OF THE INVENTION According to the present invention, an annular carrier ring is disposed around a roll with one end face abutting against a bearing in a chock incorporated in the roll, and a thrust ring is provided in connection with 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 a 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 a cylinder. Is provided with a valve body biased to the hydraulic oil supply and discharge port, and the pressure release pin is Screwed into the screw hole to close, the upper portion of the screw hole is provided end stopper pressure open pin, the bottom of the threaded hole, characterized in that the pressure opening pin stopper is provided.

[0009]

FIG. 1 shows an oil supply / drainage 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 with its peripheral surface facing 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 filling check valve 14, a commercially available check valve 14 having high pressure sealing properties can be used to enhance the pressure filling property. In this embodiment, a pressure-filled check valve 14 provided with a hemispherical valve element 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 the vicinity of 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. 18 is ensured to improve the sealing performance. In order to prevent the pressure release pin 19 from being turned excessively 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 and depressurizing the cylinder bore by the oil supply / discharge device of the present invention will be described.

1) Pressure sealing After the head 21 of the pressure release pin 19 is located at the snap ring portion which is the end stopper 23, the coupler 12b of the pressure unit is connected to the coupler 12a and set to a predetermined pressure. The hydraulic oil reaches the pressure check valve 14 from the coupler through the oil passage, and at the pressure check valve 14, the valve body 18 is pushed down by the hydraulic oil, and the hydraulic oil supply / discharge port 17 is opened.
Hydraulic oil reaches the cylinder bore through the oil passage from a gap formed between the valve body 18 and the valve body 18, and when a predetermined pressure is reached, the valve body is pushed up by the spring 16 to close the hydraulic oil supply / discharge port 17,
The pressure filling ends.

2) Depressurizing When the coupler 12b of the pressurizing unit is connected to the coupler 12a and the pressure releasing 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.

[0016]

【The invention's effect】

(1) In the present invention, the pressure sealing property and the pressure relief work are improved as compared with the conventional art, and the check valve is interchangeable, so that the reliability can be improved.

(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 improved even if different workers are implemented 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 prior art 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 performance of the device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a fuel 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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 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 Coupler of pressurizing unit 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

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Minoru Kanamori 46-59 Nakahara, Tobata-ku, Kitakyushu-shi Nippon Steel Plant Design Co., Ltd.

Claims (1)

[Claims] An annular carrier ring is disposed around the roll by abutting one end against a bearing in a chock incorporated in the roll, and a thrust ring is provided in connection with the carrier ring. A plurality of thrust blocks that can be dropped by a cylinder are provided in the neck groove, and an annular cylinder bore having an annular piston that abuts the thrust block is formed on the thrust block side of the carrier ring. In the oil supply and discharge device of the thrust ring device of the roll in the rolling mill, which uses a coupler, a pressure filling check valve is incorporated in the middle of the oil passage leading to the cylinder, and the pressure filling check valve is connected to the hydraulic oil supply and discharge port. A biased valve element is provided, and the pressure release pin is screwed into the screw hole near the surface of the valve element head. 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 equipment.