JPS62155393A - Pre-eccentric mechanism of flexible pipe 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] [Industrial Application Field] The present invention provides a method for repairing eccentric pipes by giving eccentricity to a flexible pipe joint in advance, when the pipe line is eccentric during pipe repair work, etc. The present invention relates to a pre-eccentricity mechanism for a flexible pipe joint that allows the flexible pipe joint to be easily installed on the road.

[Conventional technology]

During pipeline repair work, if the pipeline is eccentric, installing a flexible pipe joint in an eccentric position, that is, a position where the pipe core is shifted, or laying the pipeline in a place where uneven settlement is expected. In cases where it is desired that the amount of settlement due to uneven settlement be absorbed as much as possible by the flexible pipe joint, it is necessary to eccentrically set the flexible pipe joint in advance and connect it to the conduit. Conventionally, the flexible pipe joint/hand and one pipe were aligned, one end of the pipe joint was connected to this one pipe, and the other end of the pipe joint was connected with a chain block, jack, etc. After lifting or lowering, connecting the other end of the lifted or lowered pipe to the other pipe, or aligning and connecting both ends of a flexible pipe joint with the pipes on both sides, connect one pipe to a chain block or The method used was to adjust the eccentricity of the conduit by lifting or lowering it with jacks or the like.

[Problems solved by the invention]

In the above-mentioned conventional method, a flexible pipe joint or a device for lifting and lowering the pipe is large-scale, requires a great deal of time and effort, and is difficult to install. Therefore, the present invention provides a pre-eccentricity mechanism for a flexible pipe joint, which has a simple structure and is easy to operate, for attaching the flexible pipe joint to a pipeline by giving eccentricity to the flexible pipe joint in advance in the operation. The porpose is to do.

[Means and effects for solving the problems] The pre-eccentricity mechanism of the flexible pipe joint according to the present invention to achieve the above object is as follows:
Eccentricity means obliquely intersecting the axis of the flexible pipe joint from the connection end with one pipe to which the flexible pipe joint is connected to the connection end with the other pipe, and a predetermined length of face-to-face holding means and are respectively arranged and pivotally connected to each connection end.

[For production]

The tensioning or pressing force generated by shortening or elongating the turnbuckle bolt by rotating the turnbuckle of the eccentricity means causes the face-to-face retaining means to be attached to the pivot point at one connection end of the flexible pipe joint. The other connecting end of the flexible pipe joint to which this face-to-face retaining means is pivotally mounted can be lowered or lifted by pivoting around the surface.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The pre-eccentricity mechanism 1 according to the present invention is arranged between the eccentricity means 5 and the eccentricity means 5 disposed from the connection end with one pipe 3 to which the flexible pipe joint 2 is connected to the connection end with the other pipe 4. Holding means 6
It is equipped with In this embodiment, the eccentricity means 5 consists of bolts with turnbuckles, two of which are disposed obliquely to the axis of the pipe joint and axially symmetrical with respect to the axis, one on each side of the flexible pipe joint 2. As the face-to-face retaining means 6, two bolts with turnbuckles are arranged parallel to the axis of the flexible pipe joint 2 and axially symmetrically spaced apart from both the upper and lower end surfaces of the flexible pipe joint 2. has been done.

Each turnbuckled bolt constituting each eccentricity means 5 and face-to-face holding means 6 is a pair of bolts 5a, 5a and 6a, 5a threaded in opposite directions, and is attached to a turnbuckle 5b.
, 6b are interconnected. In order to attach the eccentricity means 5 and the face-to-face holding means 6 to the connecting ends of the flexible pipe joint 2, a pair of protrusions 8 are attached to the protrusions 8 fixed to the 7 flanges 7 and 7' at both ends of the flexible pipe joint 2. A pivot piece 9 made of a plate-like member is welded (see especially FIG. 4), and a turnbuckle bolt 5a or 6 is inserted into the space between the pivot pieces 9.
By inserting the flat end portion 5C or 6C of a, and inserting the bottle bolt 10 into the hole drilled in the end portion 5C or 6C and the pivot piece 9, and fixing both ends with the nut 11. , an eccentric means 5 and a face-to-face retaining means 6 are pivotally connected to the pivot piece 9.

Next, the installation, operating direction, and operation of the pre-eccentric machine l1li1 having the above configuration will be explained. After connecting one connection end of the flexible pipe joint 2 to one pipe 3, each eccentricity means 5
Attach the face-to-face retaining means 6 to each pivot piece 9, rotate each turnbuckle 5b, 6b, and adjust the distance to a distance calculated in advance according to the actual eccentricity of the pipe or the set eccentricity. Determine the distance between the flanges 7 and 7' of the flexible pipe joint 2 (interface distance). Then the turnbuckle 5 of the eccentric means 5
b in the direction in which the eccentric means 5 shortens (each bolt 5a, 5a
When it is rotated in the direction in which it is fed into the turnbuckle 5b), it moves to the arrow in Fig. 1.

Due to the action of the vertical component of the tensile force in the direction indicated by A', the 7 langes 7' are pushed down in the direction of arrow B and reach the predetermined eccentric position shown in FIG. Thereafter, the other connecting end of the eccentric flexible pipe joint is connected to the other pipe 4 to complete the conduit. In addition, in the illustrated embodiment, if the end of the flexible pipe joint 2 on the pipe 4 side is to be eccentrically lifted in a direction, the turnbuckle 5b may be rotated in the direction in which the eccentric means 5 extends. . Thus, pipe 3゜4 of pipe fitting 2
After completing the connection, each eccentric means 5 and inter-plane retaining means 6 can be removed from each pivot piece 9 and reused.

In the above embodiment, a bolt with a turnbuckle is used as the face-to-face retaining means 6. However, the eccentricity means 6 is a flange 7.7' of the flexible pipe joint 2 calculated from the eccentric position. Once it is attached to the connecting end of the flexible pipe joint 2 according to the distance between them, its length remains unchanged, so the distance between the flanges 7 and 7' can be adjusted by simply rotating the eccentric means 5. If it is possible to adjust and set the distance between the surfaces, the inter-plane retaining means 6 may be a rod whose length can be adjusted with a telescoping structure or the like instead of a bolt with a turnbuckle. It is also possible to use a rod whose length corresponds to the pre-calculated distance between the 7 flange 7.7'. Also,
The eccentricity means and the surface-to-plane holding means may be configured in various ways, such as a wire-shaped member so that the spacing can be adjusted. Just after installing the flexible pipe fitting 2, the flange 7.7'
A bolt with a turnbuckle is convenient in that the distance between them can be variably adjusted, so it is most preferable as the means 6 for holding the surface.

Further, in the above embodiment, the eccentricity means 5 is disposed obliquely to the axis of the pipe joint 2, and the face-to-face holding means 6 is arranged parallel to the axis of the pipe joint 2. Holding means 6
The arrangement direction is not limited to this, and for example, both may be arranged obliquely to the axis of the pipe joint 2.

The number of the eccentricity means 5 and the inter-plane holding means 6 is not limited to the number in the above embodiment, but can be arbitrarily selected. In this case, in order to deflect the pipe fitting 2 in a well-balanced manner, it is desirable that the eccentricity means 5 and the face-to-face holding means 6 are provided symmetrically with respect to the axis of the pipe joint 2 (for example, two eccentricity means, two face-to-face holding means 6, 4 tools, etc.).

Furthermore, instead of being attached to the flange 7.7' as in the above embodiment, the eccentricity means 5 and the face-to-face holding means 6 are attached to the outer circumference or inner circumference of the cap of the pipe joint 2, or to the outer circumference or inner circumference of the pipe 3.4. may be provided. Particularly when the flexible pipe joint 2 is round and has a large diameter, the eccentric means 5 may come into contact with the flexible pipe joint 2, so it is preferable to provide it on the inner peripheral side of the mouthpiece. In short, the eccentricity means 5 and the face-to-face retaining means 6 can perform their functions if they are installed at any position on the flexible pipe joint, including the flange and the cap, or at the connecting end of the pipe 3.4. It is possible.

In the present invention, a flexible pipe joint is a general term for joints that flexibly connect various pipes, and the pipes to be connected may be made of any material such as ceramics, steel, cast iron, FRP, stainless steel, etc. The shape is also not particularly limited, such as a circular cross section, a horseshoe shape, a quadrangular shape, and other polygons. Furthermore, the flexible pipe joint to which the present invention is applied does not have any particular restrictions on the manner in which the pipe is laid, and includes all types of pipes such as underdrains, open conduits, and immersed boxes. It is used for various purposes such as industrial water supply, water supply/sewerage, dragon roads, and public ditches.

〔Effect of the invention〕

The pre-eccentricity Ils structure according to the present invention can be easily attached to a flexible pipe joint, and can be used to determine the actual eccentricity of the pipe or the predicted eccentricity by simply rotating a bolt with a turnbuckle. The eccentric position of the flexible pipe fitting can be set accurately in advance according to the amount of water, and it can be easily changed, making it extremely easy and safe to operate compared to conventional methods.
Work efficiency can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a side view showing a state in which the pre-eccentricity mechanism for a flexible pipe joint according to the present invention is attached to the flexible pipe joint, and Fig. 2 shows a state in which the flexible pipe joint is eccentrically operated by the operation of the same mechanism. Figure, 3rd
The figure is a front view of the state shown in FIG. 1, and FIG. 4 is a partially enlarged perspective view showing how to attach the eccentric means and the inter-plane holding means. 1... Pre-eccentric mechanism, 2... Flexible pipe joint, 3, 4...
- Pipe, 5... Means for eccentricity, 6... Means for holding between surfaces.

Claims (1)

[Claims] 1. Eccentricity means obliquely intersecting the axis of the flexible pipe joint from the connecting end with one pipe to which the flexible pipe joint is connected to the connecting end with the other pipe, and a predetermined eccentricity means. A pre-eccentricity mechanism for a flexible pipe joint, in which length holding means are respectively disposed and pivotally connected to each connection end. 2. The pre-eccentricity mechanism for a flexible pipe joint according to claim 1, wherein the eccentricity means and the holding means are bolts with turnbuckles. 3. A pre-eccentricity mechanism for a flexible pipe joint according to claim 1, wherein at least one pair of each of the eccentricity means and the face-to-face holding means are provided axially symmetrically with respect to the flexible pipe joint. .