JP3375586B2 - Elbow structure of double piping - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an elbow portion in a pipe for carrying a chemical solution, a treatment waste liquid, etc. More specifically, the pipe is a double pipe and a real pipe through which the liquid actually passes is covered. The present invention relates to the structure of the elbow part made of the sheath tube.

[0002]

2. Description of the Related Art Plumbing facilities are used to convey chemical solutions and various processing waste liquids between devices. In that case,
It is preferable to prevent the outflow to the outside by a sheathed pipe that encloses even if liquid leakage occurs in the actual pipe through which the liquid actually passes and is also required from the viewpoint of safety as a protective pipe for the actual pipe. By the way.

However, in actual piping, a flexible hose is used as a double pipe to form a double pipe, or a real pipe is placed in a trough-shaped tray. Since the elbow portion cannot be bent at a right angle with a flexible hose, the elbow portion must be formed by forming a large-diameter curve, which makes piping difficult and requires a large space. is there.

[0004]

In view of the above, the present invention has a dual structure of pipes, and a sheath pipe prevents the leakage of liquid in the actual pipe portion to the outside and protects the actual pipe from external impacts and damages. In order to prevent the above, and to provide a heat-retaining function by providing a space between the actual pipe and the sheath pipe, it is possible to use a right-angled pipe in the elbow part,
It is intended to provide a configuration that can be easily assembled at the construction site.

[0005]

SUMMARY OF THE INVENTION The present invention comprises an elbow pipe, an elbow sheath pipe into which the elbow pipe can be inserted and removed, and two spacers, and a protruding edge is formed on the inner wall of the straight portion of the elbow pipe. Each spacer has a peripheral end surface slidably fitted to the inner wall of the straight part of the elbow sheath pipe, and the peripheral end portion abuts the projecting edge, while the elbow real pipe is inserted in the through hole provided in the center of the spacer. Both ends of the elbow are fitted so that the actual elbow pipe is housed and fixed in the elbow sheath pipe.

It is also possible to form a step portion having a wide diameter on the mouth side on the straight portion of the elbow sheath tube to form a contact surface of the peripheral end portion of the spacer, and to form the through hole of the spacer in a cylindrical body.

The elbow pipe can be inserted into and removed from the elbow sheath pipe, and the spacer can slide the peripheral end surface on the inner wall of the straight portion of the elbow sheath pipe. Therefore, the elbow pipe can be inserted into the elbow sheath pipe and If the spacer is slid into the elbow sheath pipe and inserted, the peripheral end of the spacer is attached to the projecting edge of the elbow sheath pipe, and the end of the elbow pipe is fitted into the through hole in the center. To do.

Therefore, if an adhesive is applied to the contact surface of the spacer with the projecting edge and the inner surface of the through hole and is inserted into the elbow sheath pipe, the spacer is fixed to the projecting edge and fixed in the elbow sheath pipe. The end portion of is fitted and supported in the through hole of the spacer, and is fixed while holding a space in the elbow sheath tube.

If the projecting edge is formed by a step portion having a wide diameter on the mouth side, it is made of synthetic resin and can be easily molded, and there is no problem in inserting the spacer, and the through hole of the spacer can be formed into a cylindrical body. For example, it is possible to strengthen the support and fixation of the elbow pipe.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially longitudinal front view showing an embodiment, which is composed of an elbow sheath pipe 1, an elbow real pipe 2, and spacers 3 and 3. The elbow sheath pipe 1 and the elbow real pipe 2 are both straight portions 1A, 1A, 2A, 2
A and bent portions 1B and 2B, and one mouth portion 1C and 2
An internal space is formed at a right angle from C to the other mouths 1C and 2C, and projecting edges 4 and 4 are provided on the inner wall surfaces 1D and 1D of the straight portions 1A and 1A of the elbow sheath pipe 1, respectively.

The elbow solid pipe 2 has such a size that it can be inserted from one mouth 1C of the elbow sheath pipe 1 and can be pulled out to the other mouth 1C. It can be positioned inside, and an operator can insert and hold a finger or a tool from the mouth 1C of the elbow sheath tube 1 on one side.

Further, the two spacers 3 and 3 have the same shape, and the peripheral end surfaces thereof have a contour that slides on the inner wall surfaces 1D and 1D of the straight portions 1A and 1A of the elbow sheath tube 1, and the central portion is at the central portion. A through hole 5 is formed. The through hole 5 has a diameter into which the straight line portions 2A and 2A of the elbow actual pipe 2 are fitted.

Therefore, the elbow real pipe 2 is placed in the elbow sheath pipe 1.
To insert the spacer 3 into a temporary support state, and apply the adhesive to the peripheral end portion of the insertion front surface side and the inner peripheral surface of the through hole 5 from one opening portion 1C to slide the spacer 3 For example, the peripheral end part is attached to the projecting edge 4, and the mouth part 2C of the elbow 2 is fitted in the through hole 5.
Since the outer periphery is fitted and adhered, and the straight portion 1A of the other elbow sheath pipe 1, the straight portion 2A of the elbow real pipe 2 and the spacer 3 are also configured in the same relationship, the elbow real pipe 2 is connected to the elbow sheath pipe 1 It is possible to support and fix it by holding a space inside.

FIG. 2 is a vertical sectional front view showing another embodiment of the elbow sheath pipe 1, in which the projecting edge 4 is formed by a step portion 6 having a wide diameter on the side of the mouth portion 1C.

3 and 4, the through hole 5 of the spacer 3 is formed into a cylindrical body 7 to widen the inner peripheral surface and to firmly fit the outer periphery of the mouth portion 2C of the elbow real pipe 2. . The hole denoted by reference numeral 8 is for passing the liquid flowing out from the elbow actual pipe 2, and is to be guided to the detection unit.

FIG. 5 is a vertical sectional front view showing an example in which a straight double pipe 9 is connected to the elbow portion. Reference numeral 10 is a pipe guide plate, and notch 11 is an outflow passage.

[0017]

INDUSTRIAL APPLICABILITY As described above, the present invention makes it possible to easily assemble the double pipe of the elbow portion at the construction site, and the effect of improving the safety and functionality by adopting the double structure. It can fulfill the needs of today's society.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional front view showing another embodiment of the elbow sheath pipe of the present invention.

FIG. 3 is a vertical sectional front view showing another embodiment of the spacer of the present invention.

FIG. 4 is a right side view of FIG.

FIG. 5 is a vertical cross-sectional front view showing an embodiment showing the connection of the straight portion to the double pipe of the present invention.

[Explanation of symbols]

1 Elbow sheath tube 2 Elbow real pipe 3 spacers 1A, 2A Straight section 1B, 2B Bend 1C, 2C mouth 1D inner wall surface 4 protruding edge 5 through holes 6 steps 7 tubular 8 holes 9 Straight tube double pipe 10 Pipe guide plate 11 notches

Claims (3)

(57) [Claims] 1. An elbow pipe and an elbow sheath pipe that can be inserted into and removed from the elbow pipe and two spacers. The elbow sheath pipe has a projecting edge on the inner wall of the straight portion, and each spacer is an elbow sheath pipe. While the peripheral end face is slidably fitted to the inner wall of the straight part of, the peripheral end part is abutted against the projecting edge, while the both ends of the elbow pipe are fitted into the through hole provided in the center part of the spacer, The structure of the elbow part of the double pipe, which is characterized by housing and fixing the elbow pipe in the elbow sheath pipe. 2. The double pipe according to claim 1, wherein a step portion having a wide diameter on the mouth side is formed in a straight portion of the elbow sheath pipe, and the step portion serves as an abutting surface of a peripheral end portion of the spacer. Elbow structure. 3. The structure of the elbow portion of the double pipe according to claim 1 or 2, wherein the through hole of the spacer is formed in a cylindrical body.