JP2002310350A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint which can easily and quickly perform connecting or removing work of a pipe. SOLUTION: This pipe joint for connecting adjacent two pipes is provided with a cylindrical main body fitting an end part to both the pipes and an annular seal member mounted in the main body, the pipe joint ensures a sealing property in a connection part of both the pipes by utilizing pressing deformation of the seal member, the main body is provided with a receiving recessed part holding the seal member received, moreover an internal peripheral diameter of the seal member is set to an external peripheral diameter or more of each pipe, and the main body, for pressing the seal member to the pipe fitted to the main body, is provided with a pressing means for lessening the internal peripheral diameter of the seal member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for connecting two adjacent pipes.

[0002]

2. Description of the Prior Art Generally, two adjacent pipes are hermetically connected by a pipe joint. As shown in FIG. 7, such a pipe joint includes a tubular main body 53 whose ends are fitted into both pipes 51, 52 in order to connect two adjacent pipes 51, 52, and each of the pipes 51, 52. The seal member 55 includes an annular seal member 55 mounted on the seal member 52 and pressing means 56 for pressing and deforming each seal member 55 onto the inner peripheral surfaces of both ends of the main body 53 and the surfaces of the tubes 51 and 52.

The pressing means 56 is externally fitted to both pipes so as to be located at both ends of the main body 53 and has a sealing member 55.
And a bolt 60 for pressing the ring body 58 to both ends of the main body 53.

In order to perform a pipe connection operation using the pipe joint, first, the ring body 58 of the pressing means 56 and the sealing member 55 are fitted over the pipes 51 and 52 in advance, and then, Both ends of the main body 53 are externally fitted to and fixed to the respective tubes 51 and 52. Further, bolts 6 provided on both ring bodies 58
By screwing 0 into the main body 53, the ring body 58 is made to approach the main body 53 side, and each seal member 55 is held.

[0005]

In the conventional pipe joint, since the inner diameter of the seal member 55 is set smaller than the outer diameter of the pipes 51 and 52, the seal member 55 resists the elastic force. While expanding the diameter, the pipes 51 and 52 were fitted to the predetermined positions. Therefore, the work of externally fitting the seal member 55 to a predetermined position of the pipe is troublesome, and time is required for the pipe connection work. In addition, if the pipe joint is disassembled and removed for maintenance or the like, the seal member 55 and the main body 53 must be separately removed, and there is a problem in workability.

Accordingly, an object of the present invention is to provide a pipe joint which can easily and quickly perform a pipe connecting operation or a pipe removing operation.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the technical means thereof is a pipe joint for connecting two adjacent pipes. A cylindrical main body having an end fitted to the main body, and an annular seal member mounted on the main body, and the sealing property of the joint portion of both tubes is secured by utilizing the pressing deformation of the seal member. In the pipe coupling, the main body is provided with a housing recess for housing and holding the seal member, and the inner peripheral diameter of the seal member is set to be equal to or larger than the outer peripheral diameter of each pipe. A pressing means for reducing the inner diameter of the seal member is provided to press the seal member against the pipe fitted to the main body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3
1 shows a first embodiment of the present invention. FIG. 1 shows two pipes 2, 3 made of steel pipe, resin pipe or cast iron by a pipe joint 1.
Shows the state of connecting. The pipe joint 1 is provided with a plurality of fixing bolt mounting portions 5a and 5b projecting radially outward (protruding radially) from both ends of the cylindrical main body 4, and each of the bolt mounting portions 5a and 5b has a fixing bolt. 7 is screwed forward and backward freely. The fixing bolt 7 at the other end of the main body 4 shown in FIG.
Are not shown.

At both ends of the main body 4, there are formed retaining ring receiving recesses 9 which are open on the inner periphery thereof and face the tips of the fixing bolts 7.
A retaining ring 10 having a wedge function is fitted therein. The retaining ring 10 is connected to the pipe 2 by the fixing bolt 7.
3 so as to be releasably pressed against the surface.

Inside the main body 4 and inside the retaining ring receiving concave portion 9, a seal member receiving concave portion 12 is formed in the circumferential direction of the main body 4. An annular seal member 13 made of an elastic member such as a rubber ring is fitted and held in the seal member housing recess 12.
Note that the seal member accommodating recess 12 covers three surfaces (excluding the inner peripheral surface) of the seal member 13. The state in which the seal member 13 is held in the seal member housing recess 12 means a state in which the seal member 13 does not spontaneously separate from the seal member housing recess 12. It can be easily attached to and detached from the recess 12.

As shown in FIG. 2, the sealing member 13 has a trapezoidal cross section and a front inclined surface 13a.
Are in contact with the tapered surface 12a formed on the inner peripheral surface of the seal member accommodating concave portion 12. The inner diameter of the seal member 13 is set to be slightly larger than the outer diameter of the pipe.

The holding member 1 which contacts the other surface (back surface) 13b of the sealing member 13 is provided in the sealing member housing recess 12.
5 are provided. The holding body 15 is, for example, shown in FIG.
As shown in (a) and (b), a plurality of divided parts are connected in a ring shape. In FIG. 1A, a convex portion 16a is provided on one pressing body 15a, and a concave portion 16b in which the convex portion 16a is fitted is provided on the other pressing body 15b. Also,
FIG. 2B shows that the holding members 15a and 15b
b are provided, and the pieces 17 are fitted into both the recesses 16b.

A pressing tapered surface 19 is formed on the upper portion on the back side of the pressing body 15, and a pressing surface 20 is formed on the front surface of the pressing member 15 so as to be in contact with the back surface 13 b of the seal member 13 (preferably, the entire surface is in contact). Have been.

A plurality of bolt mounting portions 22 are protruded radially from a portion of the main body 4 where the seal member accommodating recess 12 is provided. A sealing bolt 23 is screwed to each bolt mounting portion 22 so as to be able to advance and retreat so as to face the sealing member accommodating recess 12 and abut against the pressing tapered surface 19 of the pressing body 15. By tightening the sealing bolt 23, the pressing body 15 can be moved to the sealing member 13 side. The pressing means 25 is constituted by the pressing body 15 and the sealing bolt 23. Reference numeral 27 denotes a tube positioning projection provided at the center position on the inner peripheral surface of the main body 4 and is provided in the circumferential direction of the main body 4.

When using the pipe joint having the above configuration, first, the main body 4 is fitted to the ends of both pipes 2 and 3. The main body 4 is provided with a sealing member 13 and a holding body 15 in advance.
And each bolt is attached respectively, and it is united. Also, since the inner diameter of the seal member 13 is set to be equal to or larger than the outer diameter of the tube, the main body 4 can be easily attached to the end of each of the tubes 2 and 3 without the seal member 13 being in the way. Can be externally fitted.

Further, when the fixing bolts 7 are fastened, the fixing bolts 7 advance to press the retaining ring 10 against the tubes 2 and 3 (including the case where the retaining ring 10 is bitten). Thereby, the main body 4 is fixed to both the tubes 2 and 3.

Further, by fastening the sealing bolts 23, the pressing body 15 can be moved to the sealing member 13 side. As a result, the pressing body 15 is
Is pressed against the tapered surface 12a of the sealing member housing concave portion 12. At this time, the front inclined surface 13a of the seal member 13 is taperedly engaged with the tapered surface 12a of the seal member housing recess 12, and the outer peripheral surface of the seal member 13 is
The seal member 13 is pressed and deformed toward the inner peripheral surface side in order to come into contact with the peripheral surface 12b. In addition, the pressing body 15 is
The entire surface of the back surface 13b of the seal member 13 is pressed, so that the inner diameter of the seal member 13 is uniformly reduced in the circumferential direction.
Due to the wedge effect of 3, the tubes 2 and 3 come into close contact with each other, and the sealing property can be ensured.

Further, when the pipe joint is removed for maintenance or the like, the bolts 7 and 23 are loosened in the opposite manner, so that the pressing force of the retaining ring 10 and the seal member 13 can be relaxed, so that it is easy and quick. The main body 4 can be removed from both the tubes 2 and 3. As described above, when connecting two pipes 2 and 3 using the pipe joint and when removing the pipe joint, troublesome work in each case is eliminated, and work efficiency is improved.

FIG. 4 shows a second embodiment of the present invention. In this embodiment, the sealing bolt 23 is moved in the horizontal direction (the pipes 2 and 3).
In the direction along). Further, the pressing body 15 is configured to contact the back surface 13b of the seal member 13 and a part of the outer peripheral surface. The sealing bolt 23 and the fixing bolt 7 are provided at alternate positions (in a staggered state) in the circumferential direction of the main body 4 so as not to interfere with each other.

FIG. 5 shows a third embodiment of the present invention. The present embodiment has a configuration in which the sealing bolt 23 is provided to be able to advance and retreat from an oblique direction. Further, the pressing body 15 is configured to contact a part of the back surface 13b and a part of the outer peripheral surface 13c of the seal member 13.

FIGS. 6A and 6B show a fourth embodiment of the present invention. In this embodiment, the sealing bolt 23 is used.
And fixing bolts 7 are provided so as to be able to advance and retreat in a direction perpendicular to the tubes 2 and 3 (diameter direction). In addition, FIG.
Shows a state where the sealing bolt 23 and the fixing bolt 7 are loosened, and FIG. 2B shows a state where the sealing bolt 23 and the fixing bolt 7 are fastened.

The present invention is not limited to the above embodiments, and any pipe such as a water pipe or a gas pipe can be adopted, and the fluid flowing through the existing pipe is a liquid such as water. Other fluids such as gas and oil are also included in the scope of the present invention.

In addition, the diameters of the two tubes are not limited to the same, but can be used to connect different tubes. In such a case, the inner diameter (diameter) of one and the other of the main body is different. Further, the cross-sectional shape of the main body 4 may be any shape such as a rectangular tube shape other than the cylindrical shape.

[0024]

As described above, the main body of the present invention is provided with the accommodation recess for accommodating and holding the seal member, and the inner diameter of the seal member is set to be equal to or larger than the outer diameter of each pipe. The main body is provided with a pressing means for reducing the inner diameter of the seal member so as to press the seal member against the pipe fitted to the main body, so that the seal member is integrated with the main body. The connection and removal of pipes can be easily and quickly performed in a state where the pipes are mounted, and workability is greatly improved.

[Brief description of the drawings]

FIG. 1 is a front view including a partial cross section showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the main part.

3 (a) and 3 (b) show a state in which the presser body is disassembled, respectively. FIG. 3 (a) is a side view including a partial break, and FIG. 3 (b) is a side view.

FIG. 4 is a sectional front view showing a second embodiment of the present invention.

FIG. 5 is a sectional view of a main part showing a third embodiment of the present invention.

6A and 6B show a fourth embodiment of the present invention, wherein FIG. 6A is a cross-sectional view before connection of pipes, and FIG. 6B is a cross-sectional view of a state where pipes are connected to each other.

FIG. 7 is a sectional view showing a conventional example.

[Explanation of symbols]

2 ... tube, 3 ... tube, 4 ... main body, 13 ... seal member, 6 ... seal member housing recess (housing recess), 25 ... pressing means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H015 AA05 BA01 BA02 BA04 BB05 BB06 BC01 HA02

Claims (1)

[Claims] 1. A pipe joint for connecting two adjacent pipes, comprising: a tubular main body whose ends are fitted to both pipes; and an annular seal member attached to the main bodies. In a pipe joint that uses the pressure deformation of the seal member to ensure the sealing performance of the joint portion between the two pipes, the main body includes:
An accommodating recess for accommodating and holding the seal member is provided, and the inner peripheral diameter of the seal member is set to be equal to or larger than the outer peripheral diameter of each pipe, and the main body is sealed with a pipe fitted to the main body. A pipe joint characterized by comprising a pressing means for reducing the inner diameter of the seal member so as to press the member.