JPS63135687A - Expansion joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an expansion joint used, for example, in a continuous casting machine.

[Conventional technology]

In a continuous casting machine, normally, as shown in FIGS. 3 and 4, a slab conveying roller 2 is supported by a support frame 6 via a bearing chock 4, and the axial center of the roller 2 is supported by a supporting frame 6. A cooling water flow passage 8 is formed. Further, one end of a flexible tube 12 is connected to one end of the roller 2 via a rotary joint 10, and the other end of the flexible tube 12 is connected to a fixed pipe 14. The roller 2 is cooled by supplying cooling water from a cooling water supply device (not shown) to the cooling water flow path 8 inside the roller 2 through the fixed pipe 14, the flexible tube 12, and the rotary joint 10 in this order. It looks like this.

(Problem to be solved by the invention) However, in the above structure, the rotary joint 1
Since the flexible tube 12 connects the fixed pipe 14 with the flexible tube 12, there is a problem that the flexible tube 12 deteriorates due to heat and breaks due to bending fatigue, and if this problem is solved, the cost of the flexible tube 12 will increase. A problem arises. Furthermore, since the flexible tube 12 has too high a degree of freedom, it is difficult to position it, and it is difficult to install and remove it.

The present invention was made based on the above circumstances, and its purpose is to be able to prevent deterioration due to heat and damage due to fatigue while being low cost, and to be able to be easily installed and removed. An object of the present invention is to provide an expansion joint that achieves this.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides an outer cylinder that has a connecting screw part at one end and a rotation operation part on the outer periphery; an inner cylinder whose other end is rotatably and slidably fitted into the other end of the outer cylinder, and a seal member that seals a gap between the inner cylinder and the outer cylinder. This is a characteristic feature.

[Effect]

First, for example, the connecting threaded portion of the outer cylinder is rotated and screwed into a predetermined pipe. Then slide the inner cylinder to the other fixed pipe. Thereafter, the inner cylinder is rotated and screwed into the other fixed pipe.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

22 in Fig. 2 is a roller for conveying slabs of a continuous casting machine,
This roller 22 is supported by a support frame 26 via a bearing chock 24. A cooling water flow passage 28 is formed in the axial center of the roller 22 . In addition, the roller 22
One end of the first straight pipe 30 is fixed to one end of the
This first straight pipe 30 is configured to rotate together with the rollers 22. One end of an elbow-shaped rotary joint 32 is rotatably connected to the other end of the first straight pipe 30, and a second straight pipe 34 and a first elbow pipe 36 are connected to the other end.
, third straight pipe 38, first expansion joint 40, fourth straight pipe 4
2, second elbow pipe 44, fourth straight pipe 46, second expansion joint 48, fifth straight pipe 50, third elbow pipe 52, sixth
straight pipes 54 are screwed in order. The sixth straight pipe 54 is further connected to a fixed pipe 56. and,
The roller 22 is cooled by supplying cooling water from a cooling water supply device (not shown) to the cooling water flow path 28 inside the roller 22 through the main pipes.

The first and second expansion joints 40.48 have an outer cylinder 58 and an inner cylinder 60, as shown in FIG. The outer cylinder 58 has a female threaded portion (connection threaded portion) 66 at one end of the inner circumference.
and a hexagonal rotary operation part 6 on the outer periphery.
It has 4. Further, the inner cylinder 60 has a male threaded portion (connection threaded portion) 66 at one end of the outer periphery, and a hexagonal rotation operation portion 68 at the outer periphery. The other end side is rotatably and slidably fitted into the other end side of the outer cylinder 58. A groove 70 is formed on the outer periphery near the other end of the inner cylinder 6o, and a sealing member 72 for sealing the gap between the outer cylinder 58 and the inner cylinder 6o is accommodated in the groove 70.

First, by fitting a wrench into the rotary operation part 64 of the outer cylinder 58 and rotating it, the female threaded part 62 is inserted into the straight pipe 38.4.
6. Then, slide the inner cylinder 60 up to the straight pipe 42.50. Thereafter, a wrench is fitted into the rotation operation part 68 of the inner cylinder 60 and the inner cylinder 60 is rotated to be screwed together.

According to the above configuration, the expansion joints 40 and 48 have a structure that allows rotation and expansion and contraction, so unlike the conventional flexible tube 12, it is possible to prevent deterioration due to heat and damage due to fatigue while being low cost. can. Moreover, since positioning is easy, mounting and dismounting can be performed easily.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided an outer cylinder that has a connecting screw portion at one end and a rotation operation portion on the outer periphery, and an outer cylinder that also has a connection screw portion at one end and has a rotation operation portion on the outer periphery. However, since it includes an inner cylinder whose other end side is rotatably and slidably fitted into the other end side of the outer cylinder, and a sealing member that seals the gap between the inner cylinder and the outer cylinder, the Although the cost is low, it can prevent deterioration due to heat and damage due to fatigue, and has excellent effects such as being easy to install and remove.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a sectional view showing an expansion joint, FIG. 2 is a front view showing a roller support portion of a continuous casting machine, FIG. 3 is a front view showing a conventional example, and FIG. 4 is a side view thereof. 58... Outer cylinder, 60... Inner cylinder, 62... Connecting threaded part < m threaded part), 64... Rotation operation part, 66... Connecting threaded part (male threaded part), 68...・Rotation operation unit, 72・
...Seal member. Applicant's agent Patent attorney Takehiko Suzue Figure 1 η Figure 2

Claims (1)

[Claims] An outer cylinder having a connecting screw part at one end and a rotation operation part on the outer periphery; an outer cylinder having a connection screw part at one end and a rotation operation part on the outer periphery; What is claimed is: 1. An expansion joint comprising: an inner cylinder rotatably and slidably fitted into an end side; and a sealing member sealing a gap between the inner cylinder and the outer cylinder.