JP2014070664A - Connecting joint of double piping protection pipe and double piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting joint of a double piping protection tube which facilitates piping facility, makes repair after piping possible, does not cause failure of an operation and can supply an article stably, and to provide a double piping using the joint.SOLUTION: A connecting joint 1 includes: a main body 2 which is formed of flange parts 3 on both side edge parts and can insert each protection tube 7 to be connected from a hole of the flange part 3 into a pipe; ring bodies 4 having an edge surface coming into contact with an outer peripheral edge surface of the flange part and being formed of a through hole through which each protection tube 7 to be connected can slide; and an O-ring 6. An edge part of each protection tube 7 for connection onto which the ring body 4 and the O-ring 6 are fitted is inserted into the main body 2 from the hole of the flange part 3 while adjusting the length. Onto the outer peripheral edge surface of the flange part 3, the opposite edge surface of the ring body 4 is fastened via the O-ring 6. The O-ring 6 is deformed by a fastening clamping pressure and the protective tube 7 is held and fixed.

Description

  TECHNICAL FIELD The present invention relates to a joint for connecting a protective pipe for a double pipe to be disposed between a process device such as a chemical liquid and various processing waste liquids, and a liquid supply, and a structure of a double pipe using the joint. Is.

  Pipes are used for transporting chemical solutions and various processing waste liquids between devices. In that case, even if liquid leakage occurs in the actual pipe through which the liquid actually passes, the pipe is doubled. It is preferable to prevent outflow to the outside by a protective tube, and it is also required from the viewpoint of safety as a protective tube for an actual tube.

However, the actual piping employs a configuration in which a double tube is configured with a flexible hose as a protective tube, and a configuration in which the actual tube is placed in a bowl-shaped receiving tray.
Furthermore, both the straight part and the elbow part have a double structure of a real pipe and a protective pipe, and the center pipe is inserted into the through hole of the central part at an appropriate place, and the peripheral end surface abuts against the inner peripheral wall of the protective pipe Some have spacers.

JP 2001-200980 JP 2004-108568 A

  The problem with the double piping is that the protective pipe is a pipe that covers and covers the actual pipe with a space around it, so the length needs to be formed to match the actual pipe, The piping equipment can be easily installed, the actual pipe can be protected and the liquid leakage of the real pipe can be prevented from reaching the outside, and the actual pipe and protective pipe can be easily repaired. Is required.

  Accordingly, the present invention uses a joint for connecting a protective pipe for a double pipe that can be easily repaired after piping and can be repaired after piping and troubles do not occur, and can supply a stable product, and this joint. The purpose is to provide double piping.

  A joint for connecting a protective pipe for a double pipe according to claim 1 of the present invention has a main body that is formed with flanges on both side ends, and each protective pipe connected through a hole in the flange can be inserted into the pipe. A coupling joint comprising an annular body having an end face that abuts on the outer circumferential end face of the flange, and a slidable through hole formed in each protective tube to be coupled, and an O-ring. Insert the end of each protective tube that is inserted into the main body through the hole in the flange, adjusting the length, and tighten the opposite end surface of the ring body through the O-ring to the outer peripheral end surface of the flange The protective tube is gripped and fixed by deforming the O-ring by this clamping clamping pressure.

  According to a second aspect of the present invention, there is provided a coupling joint for a protective pipe for a double pipe according to the first aspect, wherein the inside of the main body can be seen through.

  The joint for connecting a protective pipe for a double pipe according to a third aspect of the present invention is the coupling joint according to the first or second aspect, wherein the stepped portion for locking the O-ring along the through-hole of the ring body has an outer diameter of the O-ring. It is characterized by being formed shallower.

  The double pipe structure of the present invention according to claim 4 is characterized in that the connecting joint of claims 1 to 3 is arranged at a position corresponding to the connecting portion of the actual pipe.

In the first aspect of the present invention, the end of each protective tube to which the ring body and the O-ring are inserted is inserted into the main body through the hole of the collar part while adjusting the length thereof, and O is inserted into the outer peripheral end surface of the collar part. The opposing end faces of the annular body are fastened through the ring, and the O-ring is deformed by this fastening clamping pressure to grip and fix the protective tube.
Therefore, the protective tube can be easily connected to match the length of the actual tube, and at the same time, the connection portions at both ends can be connected without preventing the formation of gaps without bonding or screwing the connection portions with adhesive. The effect that can be achieved.

  In addition, when the length of the main pipe and the protective pipe is long or short depending on the environment, the fastening between the ring body and the outer peripheral end surface of the collar is released to release the O-ring and to protect one or both After the tube is slid and the length of the actual tube is finely adjusted and aligned, it is possible to easily solve the problem by fastening again.

  Furthermore, if the fastening between the ring body and the outer peripheral end surface of the flange portion is loosened to release the grip of the O-ring and the joint is moved to one of the protective tubes, the disconnected protective tube is the actual tube of the corresponding portion. Can be removed, and the effect of facilitating replacement or repair work of the actual pipe and the protective pipe is also exhibited.

  And in the factory, it is assembled according to the piping form and dimensions in advance, the performance inspection of each part is confirmed, and it is divided into the site and assembled, so that the site work is minimized, and the work time is expected to be shortened and simplified. It has an effect that can be done.

  In addition to the effect of the first aspect, the invention of the second aspect has an effect that the inside of the pipe of the joint body can be seen through, so that it is possible to easily find a liquid leak occurring in the actual pipe and observe its appearance.

  In the invention of claim 3, in addition to the effect of claim 1 or 2, the step portion for locking the O-ring along the through hole of the ring body is formed shallower than the outer diameter of the O-ring. The positioning and the effect of guiding the pinching deformation in the holding direction of the protective tube are exhibited.

  In the invention of claim 4, by arranging the coupling joint at a position corresponding to the connecting portion of the actual pipe, it is easy to find and repair the leaking of the connecting portion where the cause of the actual pipe leaking frequently occurs. It is effective to cope with partial replacement work of actual pipes.

It is a front view which shows one embodiment of this invention. It is principal part sectional drawing of FIG. It is principal part sectional drawing of the joint of this invention. It is a side view of the ring of the present invention. It is sectional drawing which shows the relationship between the ring body of this invention, and an O-ring.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment showing a structure of a connecting portion of a double pipe according to the present invention. The inside and outside of a real pipe A and a protective pipe 7 covered with a space formed around the real pipe A In general, a material made of vinyl chloride is widely used.

  And the coupling joint 1 of the protective pipe for double piping which is the object of the present invention forms the flange part 3 at both end parts, and connects the protective pipes 7 and 7 connected from the holes 33 of the flange part 3 into the pipe. An annular body 4 having an end face 41 that comes into contact with the outer peripheral end face 35 of the flange 3 and formed with slidable through holes 5 in each of the protective tubes 7 and 7 to be connected; It is composed of an O-ring 6.

  Then, the ends of the protective tubes 7 and 7 to be connected, into which the ring body 4 and the O-ring 6 are inserted, are inserted into the main body 2 through the holes 33 of the flange portion 3 while adjusting the length thereof. The opposing end face 43 of the ring body 4 is fastened to the outer peripheral end face 35 via the O-ring 6, and the O-ring 6 is deformed by this fastening clamping pressure to grip and fix the protective tube 7.

The flanges 3 formed at both end portions of the coupling joint 1 are formed by a housing 34 whose mouth 31 is fitted and bonded to the end of the main body 2 and whose rear surface is abutted against the end surface of the main body 2. 34 is provided with a plurality of fastening holes 32 at regular intervals in the thickness direction.
Further, the protective tube 7 inserted from the flange portion 3 penetrates the hole 33 of the housing 34 by lightly rubbing and has an outer diameter that can be inserted into the main body 2 of the coupling joint 1.

The ring body 4 has an end surface 43 that faces the outer peripheral end surface 32 of the flange portion 3, and a step portion 41 that locks the O-ring 6 along the through-hole 5 of the end surface 43 has an outer diameter of the O-ring 6. It is shallow.
In addition, a plurality of fastening holes 42 corresponding to the fastening holes 32 provided at regular intervals in the thickness direction of the flange 3 are provided, and bolts 91 are inserted into the fastening holes 32 and 42 that are in contact with each other and overlap each other. Then, the nut 92 is screwed and fastened.

The O-ring 6 has an inner diameter that is slidable with the outer periphery of the protective tube 7 to be connected. The O-ring 6 is made of rubber or soft plastic having a circular cross section.
Since the O-ring 6 protrudes from the end surface 43 and is locked to the step portion 41 of the ring body 4, the O-ring 6 is pressed into the step portion 41 and crushed by the clamping pressure with the outer peripheral end surface 35 of the flange portion 3. 41 also exerts an action of being pressed and deformed to the protective tube 7 side so as to be in close contact and strongly gripped.

  Therefore, the protective tube 7 to be connected to which the ring body 4 and the O-ring 6 are inserted is inserted into the coupling joint 1 so as to coincide with the main tube A that is inserted from the side end portion where the flange portion 3 is formed and covered. After adjusting the length, the O-ring 6 is sandwiched between the outer peripheral end surfaces of the ring body 4 and the flange portion 3, and bolts 91 are inserted into the fastening holes 32 and 42 where the ring body 4 and the flange portion 3 overlap each other. When 92 is screwed and fastened, the O-ring 6 generated by this clamping pressure is deformed and firmly attached to the protective tube 7 to be gripped and fixed.

  Therefore, it is connected to the protective tubes 7 and 7 by the connecting joint 1 so as to be adjustable in length, and the liquid leaking from the main pipe A is a connection that does not leak from any of the connecting portions to the outside of the protective tube. There is no need to harden the connecting portion with an adhesive as in the prior art.

Therefore, even after the installation of the piping equipment, if the nut 92 fastened on the flange 3 side is loosened, the protective tubes 7 and 7 can be slid, and the length of the protective tube 7 is readjusted. be able to.
If the coupling joint 1 is formed of a transparent material, it is possible to easily find the leakage of liquid that has occurred in the main pipe A and to observe the appearance, and the drain port 10 stores the liquid leaking from the main pipe A. And can be used for recovery.

Since the coupling joint 1 and the protective tube 7 can slide and move freely in a state where the nut 92 fastened on the flange 3 side is loosened, the coupling with the protective tube 7 on one end side is possible. Can be used for cleaning or the like.
Further, by arranging the coupling joint 1 at a position corresponding to the connection portion of the actual pipe A, it becomes easy to find and repair the leakage of the connection portion where the cause of the liquid leakage of the actual pipe A occurs frequently. The partial replacement work can be dealt with, and the replacement or repair work of the actual pipe A and the protective pipe 7 can be facilitated.

  Furthermore, by assembling in line with the piping form and dimensions in the factory in advance, checking the performance of each part, and carrying it in divided parts to carry it to the site, it is expected to minimize the site work and shorten and simplify the work time. It can be done.

  As described above, the specific configuration in the embodiment in which the present invention has been described with reference to the drawings is an example, and does not exclude other configurations or means that can obtain the same operational effects.

DESCRIPTION OF SYMBOLS 1 Connection joint 2 Main body 3 Gutter part 4 Ring body 5 Through-hole 6 O-ring 7 Protective tube 10 Drain port 31 Mouth part 32, 42 Fastening hole 33 Hole 34 Girder body 35 Outer peripheral surface 41 Step part 43 End surface 91 Bolt 92 Nut

Claims (4)

  Each of the protective tubes to be connected has a main body in which flanges are formed at both ends and each protective tube connected from the hole of the flange can be inserted into the tube, and an end surface abutting on the outer peripheral end surface of the flange. A connecting joint comprising an annular body having a slidable through hole and an O-ring, and connecting the end of each protective tube into which the annular body and the O-ring are inserted from the hole of the collar portion to the main body The length of the ring body is adjusted and inserted, and the opposite end face of the ring body is fastened to the outer peripheral end face of the collar portion via the O-ring, and the O-ring is deformed by this fastening pressure to grip the protective tube. A joint for connecting a protective pipe for double piping, characterized by fixing.   The joint for connecting a protective pipe for a double pipe according to claim 1, wherein the inside of the pipe of the main body can be seen through.   The step for locking the O-ring along the through-hole of the ring body is formed shallower than the outer diameter of the O-ring, for connecting a protective pipe for a double pipe according to claim 1 or 2. Fitting.   A double pipe structure characterized in that the coupling joint according to any one of claims 1 to 3 is disposed at a position corresponding to a connecting portion of an actual pipe.

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