JP4637713B2 - Pipe fitting device - Google Patents

Description

  The present invention relates to a pipe joint device that seals two pipes in a liquid-tight manner, holds one pipe movably in the axial direction with respect to the pipe joint, and fixes the other pipe to the pipe joint.

  As a pipe joint device that seals the ends of two pipes in a liquid-tight manner, a pipe joint device having a configuration shown in FIG. 9 is used in many industries.

  The pipe joint device is formed at a pair of arc joint segments 1 and 2, bolt seats 3 and 3 formed at both ends of one arc joint segment 1, and both ends of the other arc joint segment 2. The bolt seats 4 and 4, the space 7 that accommodates the ends of the two pipes 5 and 6 formed in each arcuate joint segment 1, and the two pipes 5 in the space 7 of each arcuate joint segment , 6 are formed so as to extend radially inward on both sides of the space 7 of the arc-shaped joint segment, and are arranged at the ends of the two pipes 5, 6. It is formed by two tightening portions 9 and 10 that engage with the formed circumferential grooves 5a and 6a, and a bolt and nut fixing means 11 that connects the arc-shaped joint segments 1 and 2 to each other.

  The pipe joint device is configured to press the elastic rings 8 arranged in the spaces 7 and 7 of the arc-shaped joint segments 1 and 2 to the outer peripheral surfaces of the ends of the two pipes 5 and 6 to thereby end the two pipes 5 and 6. The two pipes 5 are sealed by sealing the parts, and the fastening parts 9 and 10 provided in the joint segments 1 and 2 are engaged with the circumferential grooves 5a and 6a provided at the ends of the two pipes 5 and 6, respectively. , 6 are fixed.

  In the pipe joint device, the two pipes are fixed to the arc-shaped joint segment by engaging the tightening portion provided in the arc-shaped joint segment with the circumferential groove formed at the ends of the two pipes. Therefore, neither of the two pipes can move in the axial direction with respect to the arc-shaped joint segment, and there is a problem in that the pipe expansion and contraction and the pipe bending or deformation cannot be absorbed.

  In addition, the above-mentioned type of pipe joint device has a problem that since the arc-shaped joint segment is made of cast metal, the overall weight is heavy, and the assembly work cannot be easily performed because parts are assembled at the work site. There is a point.

  An object of the present invention is to provide a pipe joint device that can solve the problems of the prior art and can absorb expansion and contraction and deformation of a pipe line by attaching one of the pipes so as to be movable in the axial direction. is there.

  The pipe joint device of the present invention has a housing-type pipe joint and two pipes that are liquid-tightly sealed to the housing-type pipe joint, and the housing-type pipe joint is formed in a C-shaped ring shape with an inverted U-shaped cross section. And a resilient ring mounted to surround the ends of the two tubes to be connected to the interior of the housing, and at least one clamping band device attached to surround the outer surface of the housing. One of the two pipes is held axially movably by a housing-type pipe joint, and the other pipe has a locking means for engaging an elastic ring on the outer surface of the end. It is fixed to the pipe joint.

  According to the present invention, one of the two pipes is disposed on the housing-type pipe joint so as to be movable in the axial direction, and the other pipe is fixed to the housing-type pipe joint. It is possible to absorb the expansion and contraction and deformation of the pipeline without shifting along the path.

  According to the present invention, by forming the housing from a metal plate, the weight can be reduced compared to the conventional product, and the necessary parts can be shipped in a state assembled at the factory. Can be planned.

Hereinafter, an embodiment of a pipe joint device according to the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 4, the pipe joint device 20 according to the present invention includes a housing-type pipe joint 21 and two pipes 22, 23 that are liquid-tightly sealed to the housing-type pipe joint 21.

  As shown in FIG. 1, the housing-type pipe joint 21 includes a housing 24, an elastic ring 25 mounted inside the housing 24, two fastening bands 26 and 26 attached to the outer surface of the housing 21, It comprises fastening means 27 for fastening each fastening band 26.

  The housing 24 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 shown in FIG. Is formed into a substantially C-shaped ring shape in which a part of an annular shape is cut out.

  The elastic ring 25 is a cylindrical body molded from rubber, and preferably has a configuration in which a lip type automatic seal mechanism that exhibits a stable sealing force according to the internal pressure and the external pressure is mounted.

  The fastening band 26 is formed of a stainless steel plate cut into an elongated rectangular shape, and has loop portions 28 and 28 formed by bending both end portions thereof so as to overlap the main body side. Circular holes 29 and 29 are formed in each loop portion 28. Each tightening band 26 is coupled to the outer surface of the housing 24 by spot welding means (not shown) so that the circular holes 29, 29 provided in each loop portion 28 are located on the same straight line.

  The fastening band 26 shown in FIG. 1 is composed of two pieces. However, when the housing type pipe joint 21 is changed according to the purpose of use, the fastening band 26 is 1 according to the width of the housing type pipe joint 21. It is changed to book or three.

2 and 3, the tightening means 27 includes a bolt 32 having a screw portion 30 and a head portion 31, a nut 33 screwed to the screw portion 30 of the bolt 32, and a screw portion of the bolt 32. And a loop pressing portion 34 formed integrally between the head portion 31 and the head portion 31. Opposite sides of the nut 33 and the loop pressing portion 34 are arcuate surfaces.

  The fastening band 26 and the fastening means 27 are combined to form a fastening band device. The tightening band device forms a substantially C-shaped ring-shaped housing 24 into an annular housing 24.

  One of the two pipes 22 and 23 has a flat outer surface at the end 22a, and is held by the housing-type pipe joint 21 so as to be movable in the axial direction. The other tube 23 has an annular groove 35 that forms a locking means that engages with the elastic ring 25 on the outer surface of the end 23a, and a portion of the elastic ring 25 is press-fitted into the annular groove 35 to thereby form a housing-type tube. It is fixed to the joint 21 so as not to move in the axial direction.

  Next, the operation of the pipe joint device according to the present invention will be described.

  As shown in FIG. 1, a housing-type pipe joint 21 of a pipe joint device 20 according to the present invention is provided with an elastic ring 25 inside a C-shaped housing 24, and a clamping band 26 is fixed to a predetermined position by welding means on the outer surface of the housing 24. And is assembled as a finished product in which the fastening means 27 is attached to the fastening bunt 26 at the manufacturing factory and shipped to the destination.

  One of the two pipes 22 and 23 sealed in a liquid-tight manner to the pipe joint device 20 according to the present invention has a flat outer surface of the end 22a, and the other pipe 23 has an outer surface of the end 23a. Has an annular groove 35 forming a locking means.

  Before assembling the two pipes 22 and 23 into the housing-type pipe joint 21, a pipe provided with an annular groove 35 from one side as shown in FIG. 4 in the housing-type pipe joint 21 assembled as shown in FIG. 23 is inserted, and the inserted pipe 23 is brought into a state in which the end protrudes from the other side of the housing-type pipe joint 21.

  In order to assemble the two pipes 22 and 23 into the housing type pipe joint 21, the pipe 22 is inserted from the other side of the housing type pipe joint 21 and the pipe 23 is pushed into the housing type pipe joint 21, as shown in FIG. The ends of the two pipes 22 and 23 to be connected are positioned so as to be surrounded by the elastic ring 25.

   Next, the tightening means 27 of the housing type pipe joint 21 is turned in the tightening direction, and the distance between the loop pressing portion 34 provided on the bolt 32 of the tightening means 27 and the nut 33 screwed to the screw portion 30 is shown in FIG. 3 to the position shown in FIG. As a result, the C-shaped ring-shaped housing 24 is deformed from the C shape into an annular shape by the fastening band 26.

  When the C-shaped ring-shaped housing 24 is deformed into an annular shape, the elastic ring 25 disposed inside the C-shaped housing 24 is deformed from the state shown in FIG. 4 to the state shown in FIG. The seal surface is pressed against the outer surface of one tube 22, and part of the other seal surface of the elastic ring 25 is press-fitted into an annular groove 35 provided on the outer surface of the other tube 23.

  In order to effectively press-fit a part of the sealing surface of the elastic ring 25 into the annular groove 35 provided on the outer surface of the tube 23, as shown in FIG. It is preferable to provide an annular rib 25a extending in the direction. In this case, the annular rib 25a is securely attached to the annular groove 35 by deformation during press-fitting by setting the protruding length larger than the depth of the annular groove 35 and the width smaller than the width of the annular groove 35.

  The pipe joint device 20 assembled in this way holds one pipe 22 in an axially movable manner with respect to the housing-type pipe joint 21 in a state where one pipe 22 is sealed by the elastic ring 25 and holds the other pipe 23 in the elastic ring. Since it is held in the housing-type pipe joint 21 so as not to move in the axial direction while being sealed by 25, the expansion and contraction of the pipe line can be absorbed, and the position is shifted in one direction from the pipe line and is biased. There is no.

  FIG. 7 and FIG. 8 are diagrams showing a modification of the embodiment of the present invention.

  In the modification of the present invention shown in FIG. 7, except that the locking means that engages with the elastic ring 25 provided on the end 23 a of the tube 23 is formed by the protrusions 36 arranged at intervals in the circumferential direction. The configurations of the housing type pipe joint 21 and the pipe 22 are the same as those in the above embodiment. In this case, the protrusions 36 arranged in the circumferential direction provided at the end 23 a of the tube 23 are engaged with the sealing surface of the elastic ring 25, and the tube 23 is in a housing shape while maintaining the state sealed by the elastic ring 25. The pipe joint 21 is held so as not to move in the axial direction.

  In the modification of the present invention shown in FIG. 7, except that the locking means that engages with the elastic ring 25 provided at the end 23a of the tube 23 is formed by blind holes 37 arranged at intervals in the circumferential direction. The configurations of the housing type pipe joint 21 and the pipe 22 are the same as those in the above embodiment. In this case, the elastic ring 25 is press-fitted into the circumferentially arranged blind holes 37 provided at the end 23 a of the pipe 23, and the pipe 23 is attached to the housing-type pipe joint 21 while maintaining the state sealed by the elastic ring 25. It is held so as not to move in the axial direction.

It is a perspective view of the housing type pipe joint of the pipe joint apparatus by this invention. It is a figure which shows the state before use of the housing type pipe joint shown in FIG. It is a figure which shows the use condition of the housing type pipe joint shown in FIG. It is sectional drawing which shows the state which has arrange | positioned one pipe | tube of two pipes which should be sealed to the housing type pipe joint of the pipe joint apparatus by this invention. It is a cross section which shows the state which attached two pipes which should be sealed to the housing type pipe joint of the pipe joint apparatus by this invention. It is a figure which shows the modification of the elastic ring provided in the housing type pipe joint of the pipe joint apparatus by this invention. It is a figure which shows the other modification of the pipe joint apparatus by this invention. It is a figure which shows the other modification of the pipe joint apparatus by this invention. It is a disassembled perspective view of the conventional housing type pipe joint.

Explanation of symbols

20 pipe joint device 21 housing type pipe joint 22 pipe 23 pipe 24 C type housing 25 elastic ring 26 tightening band 27 tightening means 35 annular groove

Claims (6)

In a pipe joint device having a housing-type pipe joint and two pipes that are liquid-tightly sealed to the housing-type pipe joint,
Housing type fittings are
A C-shaped ring-shaped housing having a reverse U-shaped cross section;
A single elastic ring that is mounted so as to surround the ends of two pipes to be connected to the inside of the housing and seals liquid-tightly on both sides of the gap between the two pipe end faces ;
At least one clamping band device attached to surround the outer surface of the housing;
One of the two pipes is disposed in the housing-type pipe joint so as to be movable in the axial direction while being sealed by the elastic ring ,
The other tube has locking means for locking to the elastic ring on the outer surface of the end portion, and is fixed to the housing-type pipe joint by partly deforming and locking the elastic ring to the locking means. ,
The part of the elastic ring is locked to the locking means at a position where the length from the end face of the other tube to the position of the locking means is smaller than half the width of the elastic ring. <br/> A pipe joint device characterized by the above.   The pipe joint device according to claim 1, wherein the locking means is an annular groove formed at an end of the pipe.   The pipe joint device according to claim 1, wherein the locking means are protrusions arranged on the outer surface of the end portion of the pipe at intervals in the circumferential direction.   The pipe joint device according to claim 1, wherein the locking means are blind holes arranged on the outer surface of the end portion of the pipe at intervals in the circumferential direction.   The pipe joint device according to any one of claims 1 to 4, wherein the fastening band is fixed to the outer surface of the housing by welding means.   The pipe joint device according to any one of claims 1 to 5, wherein the housing is formed of a stainless steel thin plate.

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