JP4987236B2 - Housing type pipe fitting - Google Patents

Description

  The present invention relates to a housing-type pipe joint for liquid-tightly sealing two pipes having an annular groove at an end, and particularly to a housing-type pipe joint that can be easily attached and detached and can be reduced in weight and size.

  As a housing-type pipe joint that seals the ends of two pipes in a liquid-tight manner, a housing-type pipe joint having the structure shown in FIG. 6 is used in many industries.

  The housing-type pipe joint includes a pair of arc-shaped joint segments 1 and 2, bolt seats 3 and 3 formed at both ends of the arc-shaped joint segment 1, and bolts formed at both ends of the arc-shaped joint segment 2. A space 7 for accommodating the ends of the two pipes 5 and 6 formed in each of the arcuate joint segments 1 and 2; and two pipes 5 and 6 in the space 7 of each arcuate joint segment. An elastic ring 8 provided so as to seal the ends, and formed to extend radially inward on both sides of the space 7 of the arc-shaped joint segment, and formed at the ends of the two pipes 5 and 6 A pair of arcuate joint segments 1 inserted through the two tightening portions 9 and 10 engaged with the circumferential grooves 5a and 6a and the openings 3a and 4a provided in the bolt seats 3 and 4 of the arcuate joint segments 1 and 2. , 2 for fastening the bolts and nuts together It is formed from 1 Tokyo.

  The housing-type pipe joint is formed by pressing the elastic rings 8 arranged in the spaces 7 and 7 of the arc-shaped joint segments 1 and 2 with the bolt and nut fixing means 11 to the outer peripheral surfaces of the ends of the two pipes 5 and 6. The ends of the two pipes 5 and 6 are sealed, and the fastening portions 9 and 10 provided on the joint segments 1 and 2 are attached to the circumferential grooves 5a and 6a provided on the ends of the two pipes 5 and 6, respectively. By doing so, the two tubes 5 and 6 are fixed to the two tubes 5 and 6.

  However, the housing type pipe joint of the above-mentioned type has a circular arc joint segment made of a casting, and a bolt seat is formed integrally with the arc-shaped joint segment. Moreover, since the assembly work is performed at the work site, there is a problem that the attachment / detachment work to the pipe cannot be easily performed.

  An object of the present invention is to provide a housing-type pipe joint that eliminates the problems of the prior art, is easy to attach to and detach from a pipe, and is lightweight and compact.

  A housing-type pipe joint according to the present invention includes a housing formed by a metal plate in a C-shaped ring shape and an inverted U-shaped cross section, and an elastic ring mounted inside the housing so as to surround the ends of a pair of tubes. And a fastening bunt attached so as to surround the outer surface of the housing, and fastening means for fastening the fastening bunt so that the housing has an annular shape.

  According to the present invention, since the housing is formed of a metal plate, it is possible to reduce the weight as compared with the conventional product, and it is not necessary to form a bolt support structure on the housing, so that it is possible to reduce the size. Furthermore, since the necessary parts are shipped in an assembled state at the factory, and the attachment is completed by attaching to the joint between the pipes by the fastening means, the attachment / detachment operation with respect to the pipes can be simplified.

Hereinafter, an embodiment of a housing type pipe joint according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a housing type pipe joint according to the present invention. FIG. 2 is a side view, partly in section, showing a state in which the housing type pipe joint according to the present invention is arranged at the end of the pipe to be sealed. FIG. 32 is a side view, partly in section, showing a state in which the housing type pipe joint according to the present invention is attached to the end of the pipe to be sealed.

  The housing-type pipe joint 20 according to the present invention is attached to the housing 21 so as to surround the outer surface of the housing 21, the housing 21 whose overall shape is a C-shaped ring shape, the elastic ring 22 mounted inside the housing 21, and the housing 21. The fastening band 23 and fastening means 24 for fastening the fastening band 23 so that the housing 21 has an annular shape.

  The housing 21 is formed by forming a housing material obtained by cutting a metal plate such as a stainless steel plate into an elongated rectangular shape into a reverse U-shaped cross section as shown in FIG. It is configured by molding into a substantially C-shaped ring shape in which a part of an annular shape is cut out. Both ends of the inverted U shape of the housing 21 act as tightening portions that engage with circumferential grooves 5a and 6a formed at the ends of the two pipes 5 and 6.

  The elastic ring 22 is a cylindrical body made of rubber, and preferably has a configuration in which a lip type automatic seal mechanism that exhibits a stable sealing force according to the pressure of the internal pressure and the external pressure is mounted. .

  The fastening band 23 is formed of a stainless steel plate cut into an elongated rectangular shape, and has loop portions 25 and 25 formed by bending both end portions thereof so as to overlap the main body side. Circular holes 26 and 26 are formed in each loop portion 25. As shown in FIGS. 4 and 5, the fastening band 23 is formed on the outer surface of the housing 21 by spot welding means S and S so that the circular holes 26 and 26 provided in the loop portions 25 are located on the same straight line. Are combined.

  As shown in FIGS. 4 and 5, the tightening means 24 includes a bolt 29 having a screw portion 27 and a head portion 28, a nut 30 screwed to the screw portion 28 of the bolt 29, and a screw portion of the bolt 29. 27 and a loop pressing portion 31 integrally formed between the head portion 28 and the head portion 28. Opposite sides of the nut 30 and the loop pressing portion 31 are arcuate surfaces.

  The tightening means may include a screw portion having a right screw portion and a left screw portion, a right screw net screwed to the right screw portion, and a left screw nut screwed to the left screw portion. Good.

  Next, the operation of the housing type pipe joint 20 of the present invention will be described.

  As shown in FIG. 1, the housing-type pipe joint 20 of the present invention has an elastic ring 22 mounted inside a C-shaped housing 21, a fastening bunt 23 is attached to the outer surface of the housing 21, and fastening means 24 is attached to the fastening bunt 23. Are assembled at the manufacturing factory as a finished product with attached, and shipped to the destination.

  First, as shown in FIGS. 2 and 4, the worker at the work site surrounds the joint of the two pipes 5, 6 with the elastic ring 22 of the assembled housing-type pipe joint 20. And the C-shaped housing 21 is arranged so that the tightening portion thereof corresponds to the circumferential grooves 5a and 6a provided at the ends of the two pipes 5 and 6.

  Next, when the worker turns the bolt 29 of the tightening means 24 in the tightening direction, the distance between the loop pressing portion 31 provided on the bolt 29 of the tightening means 24 and the nut 30 screwed to the screw portion 28 is as follows. It moves from the position shown in FIG. 4 to the position shown in FIG. As a result, the C-shaped ring-shaped housing 21 is moved from the position shown in FIG. 4 to the position shown in FIG. 5 by the fastening band 23, and the opening end of the C-shaped ring-shaped housing 21 is closed to become an annular shape. By deforming the C-shaped ring-shaped housing 21 into an annular shape, both ends of the inverted U shape of the housing 21 are engaged with the circumferential grooves 5a and 6a formed at the ends of the two pipes 5 and 6. The housing 21 is fixed to the ends of the two tubes 5 and 6.

  As described above, the housing-type pipe joint of the present invention is installed at the joint of two pipes in a state assembled at the factory, and is attached only by tightening the fastening means, and the removal is performed by loosening the fastening means. Therefore, the attaching / detaching work becomes simpler than the conventional housing type pipe joint. In addition, the housing-type pipe joint of the present invention can be reduced in weight by forming the housing from a metal plate as compared to the conventional product, and it is not necessary to form a bolt support structure in the housing, so that the housing is compact. Is possible.

  Since the housing type pipe joint of the present invention can be applied as it is to the end portion of the grooved pipe, it is compatible with the conventional housing type pipe joint.

It is a perspective view which shows one Example of the housing type pipe joint by this invention. It is a side view which shows a part in section which shows the state where the housing type pipe joint by the present invention has been arranged in the end of the pipe which should be sealed. It is a side view which shows a part in section which shows the state where the housing type pipe joint by the present invention was attached to the end of the pipe which should be sealed. It is sectional drawing which shows the state which has arrange | positioned the housing type pipe joint by this invention in the edge part of the pipe | tube which should be sealed. It is a section which shows the state where the housing type pipe joint by the present invention was attached to the end of the pipe which should be sealed. It is a disassembled perspective view of the conventional housing type pipe joint.

Explanation of symbols

5 pipe 6 pipe 20 housing type fitting 21 C type housing 22 elastic ring 23 fastening band 24 fastening means

Claims (3)

A housing-type pipe joint for liquid-tightly connecting a pair of grooves with grooves each having a groove formed therein,
It is a shape having an open end in which a part of an annular shape is cut out by a metal plate, forming a single C-shaped ring shape, and a cross-sectional shape is formed in an inverted U shape, and both end portions of the inverted U shape are the groove portions A housing formed as a single body engageable with,
An elastic ring mounted to surround the ends of the pair of tubes inside the housing;
A tightening band attached to surround the outer surface of the housing;
Tightening means for tightening the tightening band so that the housing has a closed annular shape,
The housing, the elastic ring, the tightening band, and the tightening means are integrally formed by mounting the elastic ring inside the housing, attaching the tightening band to the outer surface of the housing, and attaching the tightening means to the tightening band. Used for finished products that are temporarily assembled,
The housing and the elastic ring in the finished product have a diameter larger than an outer diameter of the pair of tubes so that the finished product can be attached to the pair of tubes.
The finished product is arranged on the pair of tubes so that the elastic ring of the finished product surrounds a joint portion of the pair of tubes and both ends of the inverted U shape correspond to the positions of the groove portions, respectively. The open end is closed and closed into an annular shape by being tightened through the band by the attaching means, and the housing is deformed into a closed annular shape so that both ends of the inverted U shape of the housing are engaged with the groove portion. The housing is fixed to the ends of the pair of tubes, and the finished product is liquid-tightly attached to the pair of tubes ,
The metal plate is a thin plate,
The fastening band is coupled to an outer surface of the housing;
The tightening means includes a screw portion having a right screw portion and a left screw portion, a right screw nut screwed to the right screw portion, and a left screw nut screwed to the left screw portion. A housing type pipe joint characterized by   The housing-type pipe joint according to claim 1, wherein the fastening band is coupled to the outer surface of the housing by spot welding means.   2. The housing type pipe joint according to claim 1, wherein the metal plate is a stainless steel thin plate.

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