JP4880058B2 - Outer pipe structure of joint in double piping pipe - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a structure of piping that is disposed for transporting and supplying liquids between process devices such as chemical liquids and various processing waste liquids. Concerning structure.

  For example, it is desirable to use double pipes for chemical solutions and waste liquids as a safety requirement for transportation. Double pipes can be configured as flexible hose outer pipes (sheath pipes), or can be installed in a bowl-shaped tray. Some have a modified double pipe on which a pipe (inner pipe) is placed.

  The joint member is used not only in the case of damage due to an accident or the like, but in particular in the elbow part where the joint member is inevitably necessary, as well as in the part that becomes the branch part in the straight part and the straight part. Therefore, there is a possibility that a gap is generated between the joint member and the actual pipe to be connected to cause a liquid leak.

In addition, instead of the conventional vinyl chloride as the material of the actual pipe, there is a thing using a fluororesin excellent in chemical resistance and strength, and the risk of liquid leakage due to breakage etc. has been greatly eliminated Yes.
Further, the structure of the above-mentioned joint portion has also been improved, and a joint is adopted in which the tightness between the joint and the actual pipe is strengthened by a tightening nut, and if the nut is tightened well, liquid leakage can be prevented. Various proposals have been made.

JP 2001-200980 A

As described above, in the joint portion in which the joint member and the actual pipe are connected and sealed with the tightening nut, it is assumed that the tightening nut naturally loosens for some reason due to the passage of time, and liquid leakage occurs from there. .
In such a case, if at least the joint portion is a double pipe, leakage of the liquid to the outside can be prevented, but it is necessary to retighten the loosened nut properly.

  Therefore, the present invention covers the joint part of the form that connects and seals the joint member and the actual pipe with a tightening nut to form a double pipe, and can easily perform additional tightening work even if the tightening nut is loosened, It is intended to provide an outer pipe structure of a joint portion in a double pipe that can be restored to the original double pipe after the work is completed.

The outer pipe structure of the joint portion of the double pipe according to claim 1 of the present invention comprises a cylindrical body that covers the joint portion of the actual pipe, and a spacer member that contacts the openings at both ends of the cylindrical body. One of the screws to be screwed together is formed and screwed onto the overlapping connection surface of the body and the spacer member, and a through hole is provided in the spacer member's abutting plate for sliding through the actual tube. A positioning guide cylinder into which a tightening nut for connecting and fixing the pipes is inserted is projected from the contact surface of the spacer member into the cylindrical body .

  The outer pipe structure of the joint portion in the double pipe according to claim 2 is characterized in that, in claim 1, the outer pipe structure of the pipe and the spacer member is hermetically sealed with a sealing material interposed.

  The outer pipe structure of the joint portion of the double pipe according to claim 3 is the sealing structure according to claim 1 or 2, wherein a sealing material is provided on the peripheral surface of the through hole through which the actual pipe is rubbed and inserted into the contact surface of the spacer member. In this way, the adhesion with the actual pipe is improved.

5. The outer pipe structure of the joint portion in the double piping pipe according to claim 4 is any one of claims 1 to 3 , wherein the connecting port portion of the outer pipe of the straight portion is provided on the opposite side of the cylindrical body from the contact surface of the spacer member. It is characterized by projecting.

The outer pipe structure of the joint portion in the double pipe according to claim 5 is the outer pipe structure according to any one of claims 1 to 4 , wherein a radial turning handle is protruded on the outer surface of the contact surface of the spacer member in the vicinity of the peripheral end surface. It is characterized by this.

  In the first aspect of the present invention, the spacer member is attached and closed to the openings at both ends of the cylindrical body covering the joint portion of the actual pipe, and the actual pipe is slid into the through hole on the contact surface of the spacer member. Since it is inserted, the positional relationship between the outer pipe and the joint portion (and the actual pipe) is stabilized, and the leaked liquid can be retained in the outer pipe by covering the determined joint portion without a gap.

In addition, since the cylinder and the spacer member can be attached and detached by screwing, the tightening nut can be increased by loosening the screw by inserting the jig from the opening of the cylinder by sliding and sliding on the actual pipe. The spacer member inserted through the actual pipe can be slid and screwed into the cylindrical body to close the opening and close, thereby exhibiting an effect of closing.
Furthermore, since the positioning guide cylinder into which the tightening nut for connecting and fixing the actual pipe is inserted protrudes from the contact surface of the spacer member into the cylinder, the tightening nut of the joint covering the positioning guide cylinder is accommodated and This has the special effect of stabilizing the positional relationship between the pipe and the joint member itself.

  In the invention of claim 2, since the sealing material is interposed between the overlapping connection surfaces of the cylindrical body and the spacer member, the adhesiveness of the screwing portions of both is increased, and there is an extraordinary effect of ensuring the retention of the leaked liquid in the outer tube.

  The invention according to claim 3 is characterized in that a sealing material is provided on the peripheral surface of the through hole that is inserted by sliding the actual pipe on the contact surface of the spacer member, thereby improving the adhesion with the actual pipe and There is an extraordinary effect that prevents leakage of the outer pipe and ensures retention of the leaked liquid in the outer tube.

In the invention of claim 4 , since the connecting port for the outer tube of the straight portion protrudes from the contact surface of the spacer member on the opposite side of the cylindrical body, the connecting port for the actual tube of the straight portion is also provided. It is possible to easily extend the outer pipe by using a double pipe to obtain a special effect.

According to the fifth aspect of the present invention, since a radial turning handle protrudes on the outer surface of the contact surface of the spacer member in the vicinity of the peripheral end face, the spacer member can be easily turned by using this turning handle. It has a special effect that can be attached to and detached from the cylinder.

It is a partially vertical front view which shows the use condition of the outer tube | pipe of this invention. It is a front view of the spacer member of the present invention. It is a side view of the non-cylinder side of the spacer member of the present invention. It is sectional drawing of the cylinder of the outer tube | pipe of a T-shaped joint part.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partially longitudinal front view showing a use state of an outer tube showing an embodiment of the present invention, and shows a state where a joint portion of an elbow portion is covered.
2 is a front view of the spacer member in FIG. 1, and FIG. 3 is a side view of the outer side of the spacer member.

  The outer pipe 10 of the joint portion in the double pipe according to the present invention includes a cylindrical body 3 that covers the joint 2 of the actual pipe 1 and a spacer member 4 that contacts the openings 31 and 31 at both ends of the cylindrical body 3. And one of the screws 32 and 41 that are screwed together is formed and screwed onto the overlapping connection surface of the cylinder 3 and the spacer member 4, and the actual tube 1 is rubbed against the contact plate 42 of the spacer member 4. Through holes 43 are provided.

The cylindrical body 3 in the drawing has an L shape covering the elbow portion of the actual pipe 1, and the surfaces of the openings 31 and 31 form an angle of 90 degrees, which is sufficient for the joint 2 connecting the covering actual pipe 1. It has an inner diameter that can provide a space.
Screws 32, 32 are formed on the inner surfaces in the vicinity of the openings 31, 31, respectively, and the screws 32, 32 are fitted into the opening 31 and are crimped or bonded to form a mouthpiece integrally formed by crimping. 33 and 33 are formed on the inner surfaces.

  The spacer member 4 is formed with a through hole 43 in a circular center portion of a contact plate 42 having a diameter large enough to contact and close the opening 31 (including the mouth member 33) of the cylindrical body 3, and the outer periphery. A ring-shaped screw shaft 45 having a concentric circle formed with a screw 41 is provided on the contact surface 44 side with respect to the opening 31.

  The through-hole 43 has substantially the same diameter as the actual pipe 1, and an O-ring 46, which is a sealing material, is embedded on the inner peripheral surface so as to protrude from the inner peripheral surface. At the same time, the joint 2 has a positioning effect.

The screw shaft 45 has a longer diameter than the through-hole 43, the screw 41 is screwed with the screw 32 formed in the opening 31 of the cylindrical body 3, and an O-ring 47, which is a seal material, is attached to the base of the screw 41. 44 is attached in contact with.
Therefore, the threaded engagement between the cylindrical body 3 and the spacer member 4 is performed by interposing the O-ring 47, and the adhesion is improved.

The positioning guide cylinder 5 extends between the through hole 43 and the screw shaft 45 on the contact surface 44 of the spacer member 4.
When the spacer member 4 is screwed onto the cylinder 3, the outer nut 10 constituted by the cylinder 3 and the spacer member 4 is stored in the positioning guide cylinder 5 so that the tightening nut 21 of the coated joint 2 is accommodated. And the joint 2 are positioned.

  On the other hand, a radial turning handle 6 protrudes in the vicinity of the peripheral end surface on the outer surface (non-cylinder 3 side) opposite to the contact surface 44 of the spacer member 4, and this turning handle 6 is used. The spacer member 4 can be easily attached to and detached from the cylinder 3 by rotating.

  Further, a pipe-like connection port 7 is provided on the outer surface of the spacer member 4, and the outer tube is inserted into the straight tube 1 using the connection port 7. It is possible to make a double pipe by extending.

In this way, the joint portion of the inner tube can be covered and the adhesiveness of each component member is high, and an outer tube that retains leaked liquid inside and does not leak outside can be formed.
Further, the inner tube and the outer tube can be positioned by associating the through hole 43 with the actual tube 1 and the positioning guide cylinder 5 with the tightening nut 21.
Further, by unscrewing the cylindrical body 3 and the spacer member 4 and opening the opening, the tightening nut 21 of the loose joint 2 is tightened, and the spacer member 4 can be easily returned to the cylindrical body 3. It can be done.

  As shown in FIG. 4, the outer tube may be configured by forming a T-shaped tubular body 3 corresponding to the joint even for the T-shaped joint portion. However, this can be dealt with by using a straight cylinder and a spacer member.

Although the O-ring 47 is provided in the spacer member 4 in the drawing, it may be embedded in the contact surface with the cylindrical body 3.
In addition, each member can be molded from an appropriate resin material such as vinyl chloride, and it is desirable that the cylindrical body 3, the positioning guide cylinder 5 and the connection port 7 are made of a transparent material.

DESCRIPTION OF SYMBOLS 1 Actual pipe 2 Joint 3 Cylindrical body 4 Spacer member 5 Positioning guide pipe | tube 6 Rotating handle 7 Connection port part 21 Clamping nut 31 Opening part 32, 41 Screw 33 Port member 42 Attaching plate 43 Through-hole 44 Attaching surface 45 Screw Shaft 46, 47 O-ring

Claims (5)

It consists of a cylinder that covers the joint part of the actual pipe and a spacer member that is attached to the openings at both ends of this cylinder, and forms either one of the screws that are screwed together on the overlapping connection surface of the cylinder and the spacer member The spacer guide plate is provided with a through hole through which the actual pipe is rubbed and inserted, and a positioning guide cylinder into which a fastening nut for connecting and fixing the real pipe is fitted. An outer pipe structure of a joint portion in a double piping pipe, characterized in that it protrudes into the cylinder from the contact surface .   2. The outer pipe structure of a joint portion in a double piping pipe according to claim 1, wherein a sealing member is interposed between the cylindrical body and the spacer member so as to be sealed.   3. A seal member is provided on a peripheral surface of a through hole that is inserted by sliding the actual pipe on the contact surface of the spacer member to improve adhesion to the actual pipe. The outer pipe structure of the joint in the double piping pipe. The joint in a double pipe according to any one of claims 1 to 3 , wherein a connecting port for the outer pipe of the straight portion protrudes from the contact surface of the spacer member on the opposite side of the cylindrical body. Part outer tube structure. The outer pipe of the joint portion in the double pipe according to any one of claims 1 to 4 , wherein a radial turning handle is provided in the vicinity of the peripheral end face on the outer surface of the contact surface of the spacer member. Construction.

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