JP2001004069A - Joint for pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a joint body from rotating together with a fastening nut in a side where the fastening nut is fastened, and thereby, make an operation for attaching a joint on a tank and the like suitably. SOLUTION: A joint body 1 is formed in such a constitution that a male screw 6 is disposed on an outer peripheral surface of a cylindrical part 5 penetrated to an attaching hole 4 formed on a constituting wall 3 of a tank and the other apparatus, a female screw 7 of the direction opposite to the male screw 6 is disposed on an inner circumferential surface, and a screw hole 7A for screwing a joint part of a pipe line is disposed. A flange 2 for holding the constituting wall 3 by a fastening nut 10 screwed around the male screw 6 is disposed on a base part of the cylindrical part 5 of the joint body 1. A cutout 9 for locking a tool is disposed on a tip end of the cylindrical part 5 protruded from the fastening nut 10 when it is screwed around the male screw 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint which is attached to a fluid (liquid, gas) outlet of a tank or other equipment and is used for connecting a pipe such as a steel pipe.

[0002]

2. Description of the Related Art A male screw is provided on an outer peripheral surface of a cylindrical portion penetrating a mounting hole formed in a wall (of a fluid chamber) of a tank or other equipment, and a female screw is provided on an inner peripheral surface in a direction opposite to the male screw. There is a structure in which a flange for clamping the component wall is provided at a base portion of the cylindrical body, which mainly includes a screw hole for screwing a joint portion of a pipe, with a fastening nut screwed into the male screw. .

[0003]

A pipe joint used for mounting a pipe such as a steel pipe by attaching it to a fluid outlet of a tank is, as can be seen in the structure of the above-mentioned conventional example, one side of a constituent wall of the tank. A flange is applied to the (inner wall), and the component wall is sandwiched between the flange and a tightening nut which is screwed to a male screw provided on the cylindrical body portion, and the component wall is fixed to the outlet (component wall).

Therefore, in order to screw the tightening nut into the male screw and tighten it, it is necessary to keep the inside of the tank in a fixed state in order to prevent the joint body from rotating around. Must be put in a tank, put in a small tank and put on the upper body, and this work is complicated, often omitted due to the deterioration of the quality of the workers, and more complicated correction work is performed at a later date. ing.

In view of such a situation, the present invention does not require fixing (fixing) of a joint main body (at one side of the component wall) inside the tank, but outside the tank (at another side of the component wall). ), The joint is mainly fixed at the same time as the screwing and tightening operation of the tightening nut, thereby providing a pipe joint which addresses the drawbacks of the conventional example.

[0006]

Means for Solving the Problems A male screw is provided on the outer peripheral surface of a cylindrical body portion penetrated through a mounting hole formed in a constituent wall of a tank or other equipment, and a female screw is provided on an inner peripheral surface in a direction opposite to the male screw. At the base of the tubular body, which is formed of a screw hole for screwing the joint of the pipe, is provided a clamping portion for clamping the component wall with a tightening nut screwed into the male screw.
Basically, a notch or a through hole for locking a tool is provided at a distal end of the cylindrical body projecting from the tightening nut when screwed into the male screw. , A notch or a through hole is provided within the axial width of the portion to form a seal tape (usually a male screw portion at the end of the steel pipe constituting the pipeline). Teflon) can be provided with a joint that is not damaged by cutouts or holes.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a working state of a pipe joint according to the present invention. FIG. 1 is a sectional view showing a working state, and FIG.

In the figure, reference numeral 1 denotes a joint body provided with a flange (flange piece) 2 constituting a clamping member at an intermediate portion of a cylindrical body. The joint body 1 has a tank C on one half side with the flange 2 as a boundary. A cylindrical body 5 is formed to penetrate the mounting hole 4 formed in the wall 3. A male screw 6 is provided on the outer peripheral surface of the cylindrical body 5, and a female screw 7 is provided on the inner peripheral surface in a direction opposite to the male screw 6. Is the cylindrical part 5
The screw hole 7A is formed by providing the front end of the screw hole in the entire area left in the axial direction.

The remaining portion 8 of the cylindrical portion 5 without forming the female screw 7 (the tip portion of the screw hole 7A) has the remaining portion 8
A pair of notches 9, 9 facing each other are provided within the width in the axial direction of FIG.

Note that a through hole may be provided in place of the notch 9, and the through hole should be formed within the width of the remaining portion 8 in the axial direction.

Incidentally, the axial width of the portion 8 left here means that the seal tape wound around the male screw portion (one of the joints of the pipe) at the end of the steel pipe is used to connect the male screw portion to the female screw 7. When screwing, the notch 9 or the through-hole means "within the axial width" such that it is not torn by the edge of the notch 9 or the edge of the through-hole (so-called burrs). There is no problem if the degree of laceration is within the allowable range even if it is polymerized.

Therefore, if the sealing tape is not used, the remaining portion 8 may be omitted.

The arrangement position or number of the notches 9 or the through holes is
In short, it is only necessary to prevent the joint main body 1 from rotating together with the tightening nut 10 by using the notch 9 or the like, and it is not necessary to limit the arrangement position and the number of the embodiment.

The flange 2 has a ridge 11 along the axial direction of the cylindrical body 5 (main body 1 of the joint) at a peripheral end of one surface on the side of the cylindrical body 5, and the first seal ring 12 is provided with the ridge 11. 11, the other side of the flange 2 (the other half of the joint main body 1 bounded by the flange 2) may have the same diameter as the entire flange 2. There is no.

The tightening nut 10 has one end in the axial direction formed by a flange 14 having substantially the same diameter as the flange 2, and the other end formed by a hexagonal tool engaging portion 13. Is provided with a female screw 16 corresponding to the male screw 6.

Thus, the cylindrical portion 5 of the joint main body 1 with the first seal ring 12 mounted so as to be disposed inside the ridge 11 is provided.
Through the mounting hole 4 from the inside of the tank constituting wall 3 (inside of the tank) to protrude from the constituting wall 3, and tighten the nut 1 via the second seal ring 15 (may be omitted).
0, the component wall 3 is connected to the flange 2 and the flange 1 via the first and second seal rings 12 and 15.
4 (clamping nut 10), the joint A composed of the joint body 1 and the clamp nut 10
Attached to

When the tightening nut 10 is tightened, the joint body 1 tends to rotate together with the rotation torque of the tightening nut 10, but the tip of the cylindrical body 5 protruding from the nut 10 through the tightening nut 10. When a proper tool is engaged with the notch 9 formed on the side and brought into the stationary state, the joint main body 1 is locked to the tool held in the stationary state via the notch 9 and its co-rotation is regulated, and the tightening nut 1 is tightened. Ten strong tightening operations are performed.

After assembling and fixing the joint A to the device in this way, the pipe joint is screwed and connected to the screw hole 7A (female screw 7). That is why the male screw 6 and the female screw 7 are reversed.

The joint A according to the present invention can be applied to equipment other than a tank.

[0020]

Since the present invention has the same configuration as the previous machine,
On the side that performs the tightening operation of the tightening nut, co-rotation with the tightening nut of the joint body can be prevented.
It is possible to provide a pipe joint suitable for mounting operation on a tank or the like.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a use state.

FIG. 2 is a sectional view showing a use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint main body 2 Flange 3 Configuration wall 4 Mounting hole 5 Cylindrical part 6 Male screw 7 Female screw 7A Screw hole 9 Notch 10 Tightening nut

Claims (2)

[Claims] 1. An external thread is provided on an outer peripheral surface of a cylindrical body portion that penetrates a mounting hole formed in a component wall of a tank or other equipment,
On the inner peripheral surface, a female screw in the opposite direction to the male screw is provided, and a screw nut for screwing the joint of the pipe is formed into a screw hole. A pipe joint comprising: a clamping portion for clamping a component wall; and a notch or through hole for locking a tool at a tip end of the cylindrical portion projecting from the fastening nut when screwed into the male screw. . 2. The pipe joint according to claim 1, wherein a female screw is provided while leaving a distal end side of the cylindrical body portion in the axial direction, and a cutout or a through hole is provided within the axial width of the portion.