JP3166594U - Pipe fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a pipe joint which enables piping work without the need for fitting. SOLUTION: A spherical concave seat 12a is provided at a central portion of a flange member 12 on the left end surface F2 side. An O-ring storage body 18 having a convex spherical surface formed on its right end surface is slidably housed in the concave seat 12a, and its left end side is in contact with the fixing block 10. Further, the flange member is formed with a concave spherical washer that slidably accommodates the convex spherical washer 14. The hole diameter of the bolt hole of the flange member is slightly larger than the outer diameter of the bolt 16. In the work of assembling the piping pipeline to the apparatus, when the flange member and the axial center C12 of the pipe 20 must be connected to the axial center C10 of the fixed block 10 with an angle θ, the flange member is stored in the O-ring. After sliding the main body to a predetermined tilted state, the bolts can be fastened. [Selection diagram] Fig. 1

Description

The present invention relates to a pipe joint, and more particularly, to a pipe joint structure that does not require actual matching (hereinafter referred to as "joint") in piping work.

When constructing pipes made of metal pipes in devices such as hydraulic drive units, in-situ work is usually required.

For example, when pipes 26 and 28 are connected between the hydraulic blocks 18 and 16 of the hydraulic winch device 10 as the hydraulic drive unit shown in FIG. The mounting surfaces of the flanges 20 and 24 (corresponding to the flange FL in FIG. 5 of the same document) are rarely assembled with high accuracy as instructed in the drawing.

Accordingly, the piping operator can assemble a unit obtained by integrating and uniting the piping members 20, 26, 22, 28, and 24 formed in a predetermined dimension in advance from a location other than the installation location of the apparatus. Unlike the method of bringing into the site and assembling to the apparatus, the pipes 28 and 26 are actually connected between the hydraulic blocks 18 and 16 of the apparatus 10, and each flange and the pipe are temporarily attached (welded). What is made into a unit by performing main welding at a place different from the apparatus 10 is assembled to the apparatus 10.

In the case of the above-mentioned assembly, the pipe members that are unitized for the main welding must be taken out to another place after the temporary attachment, and the assembly position of the apparatus again for the final assembly after the main welding. Must be brought into.

In particular, when the thickness and length of the piping is large, there is a problem that the carrying-in and carrying-out operations themselves are difficult.

Further, what is disclosed in FIGS. 1 to 3 of the above-mentioned Patent Document 1 is proposed in order to eliminate the need for jointing, and the length of the pipe axis direction can be adjusted when the pipe is assembled. However, it is not possible to cope with the case where the hydraulic blocks 16 and 18 fixed to the apparatus 10 and the axes of the pipe lines 26 and 28 are inclined, and the apparatus is not provided between the mounting blocks 16 and 18 of the apparatus. In the present situation where the spatial dimensions are not accurately formed according to the dimensions indicated in the drawing, it is absolutely necessary to perform a joint operation.

JP 2010-203565

As a result of intensive studies and studies to avoid this joint work, the present inventor has found that the above problem can be basically solved by interposing a means having an orientation adjustment function between the flange and the pipeline. I found it.

Accordingly, an object of the present invention is to provide a structure of a pipe joint that enables piping work without the need for joining.

In order to achieve the above object, the structure of the pipe joint according to the present invention is as follows:
A fixed block having an opening for a pipe line at the end;
A through hole for communicating with the opening of the fixed block is provided, and a pipe member is fixed in advance at one end thereof by welding, and a spherical portion is formed at the center of the through hole at the other end. A flange member;
An O-ring storage body disposed between the flange member and the fixed block, allowing the flange member to be inclined to the end face of the fixed block, and having an O-ring groove that contacts the flange member and the fixed block, and
A fastening means for pressing the flange member to the end face of the fixed block through the O-ring housing body in a tiltable state;
The fastening means comprises a bolt hole provided in the flange member, a spherical seat formed on the bolt insertion side, a spherical washer and a bolt,
On the flange member side of the O-ring storage body, a spherical surface portion slidable with the spherical surface portion of the flange member is formed,
The inner diameter of the bolt hole is larger than the outer diameter of the bolt depending on the degree to which the inclination of the flange member is allowed.

The structure of the pipe joint according to the present invention according to claim 1 is:
A fixed block having an opening for a pipe line at the end;
A through hole for communicating with the opening of the fixed block is provided, and a pipe member is fixed in advance at one end thereof by welding, and a spherical portion is formed at the center of the through hole at the other end. A flange member;
An O-ring storage body disposed between the flange member and the fixed block, allowing the flange member to be inclined to the end face of the fixed block, and having an O-ring groove that contacts the flange member and the fixed block, and
A fastening means for pressing the flange member to the end face of the fixed block through the O-ring housing body in a tiltable state;
The fastening means comprises a bolt hole provided in the flange member, a spherical seat formed on the bolt insertion side, a spherical washer and a bolt,
On the flange member side of the O-ring storage body, a spherical surface portion slidable with the spherical surface portion of the flange member is formed,
Since the inner diameter of the bolt hole is made larger than the outer diameter of the bolt depending on the degree to which the inclination of the flange member is allowed,
When assembling to a device with the pipe line welded to the weld in advance, it is possible to fasten the flange member while inclining it even if there is an inclination of the pipe axis with respect to the central axis of the fixed block opening of the device. It is.

The structure of the pipe joint by this invention is shown, (a) is the schematic front view which looked at the pipe joint of this invention from the pipe line side, (b) is ZZ sectional drawing of (a), It is a figure which shows that a flange member can be fastened with inclining.

A preferred embodiment of the present invention will be described below with reference to FIG.
1A and 1B show the structure of a pipe joint according to the present invention. FIG. 1A is a schematic front view of the pipe joint of the present invention as viewed from the pipe side, and FIG. 1B is a sectional view taken along the line ZZ in FIG. In particular, the flange member can be fastened while being inclined.

In FIG. 1A, reference numeral 10 is a fixed block for supplying and discharging pressure oil attached to an apparatus such as a hydraulic unit. A flange member 12 is disposed on the front side of the fixed block 10. Reference numeral 16 is a fastening bolt provided at each corner portion of the flange member 12, and reference numeral 20 is a metal pipe constituting the pipe, and one end side thereof is fixed to the flange member 12 by welding.

As shown in more detail in FIG. 1 (b), the left end of the pipe 20 is in contact with a step S on the inner periphery of the through hole provided in the center of the flange member 12, and the right end surface F 1 of the flange member 12. It is welded and fixed at the welding portion W on the side. A spherical recess 12a is provided at the center of the flange member 12 on the left end surface F2 side, and an O-ring storage body 18 having a convex spherical surface formed on the right end surface can slide into the recess 12a. Is housed in.

The left end side of the O-ring storage body 18 is in contact with the fixed block 10. Reference numerals 18 a and 18 b are O-rings housed in grooves facing the flange member 12 side and the fixed block 10 side of the O-ring housing body 18.

  Reference numeral 14 denotes a convex spherical washer, and the flange member 12 is formed with a concave spherical seat that slidably accommodates the convex spherical washer 14. The axial center of the bolt hole of the flange member 12 is aligned with the axial center of the screw hole of the fixed block 10. Further, the hole diameter of the bolt hole of the flange member 12 is made slightly larger than the outer diameter of the bolt 16.

According to the flange-type pipe joint having the above-described structure, the flange member 12 and the axis C12 of the pipe 20 have an angle θ with respect to the axis C10 of the fixed block 10 in the assembling operation of the pipe line to the apparatus. When it is necessary to connect in a state, the flange member 12 can fasten the bolt after the O-ring housing body 18 is slid into a predetermined inclined state. In this case, since the axis of the bolt 16 is parallel to the axis C10 on the fixed block 10 side, the convex spherical washer 14 slides on the concave spherical seat of the flange member 12 and stays in place with tightening.

By setting the tightening force of the bolt 16 to a predetermined value, the fluid flowing in the central pipe line in the figure does not leak to the outside by the O-rings 18a and 18b.
Further, in this example, since the O-ring housing main body 18 and the flange member 12 having a pair of spherical contact surfaces are provided, there is no restriction on the direction of inclination on the flange member side, and the assembly work on the site is facilitated. It is.

While the preferred embodiment of the present invention has been described with reference to FIG. 1, the present invention is not limited to that shown in the drawing. Those skilled in the art can variously modify the preferred embodiments disclosed in the drawings, and these modified embodiments are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Fixed side block 12 Mounting flange member 12a Spherical surface part 14 formed in flange member Spherical washer 16 Fastening bolt 18 O-ring storage body 18a O-ring 18b O-ring 20 Pipe

Claims (1)

A fixed block having an opening for a pipe line at the end;
A through hole for communicating with the opening of the fixed block is provided, and a pipe member is fixed in advance at one end thereof by welding, and a spherical portion is formed at the center of the through hole at the other end. A flange member;
An O-ring storage body disposed between the flange member and the fixed block, allowing the flange member to be inclined to the end face of the fixed block, and having an O-ring groove that contacts the flange member and the fixed block, and
A fastening means for pressing the flange member to the end face of the fixed block through the O-ring housing body in a tiltable state;
The fastening means comprises a bolt hole provided in the flange member, a spherical seat formed on the bolt insertion side, a spherical washer and a bolt,
On the flange member side of the O-ring storage body, a spherical surface portion slidable with the spherical surface portion of the flange member is formed,
The pipe joint structure according to claim 1, wherein an inner diameter of the bolt hole is made larger than an outer diameter of the bolt in accordance with a degree of allowing the flange member to be inclined.

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