JPH07198088A - Connecting cylinder for pipe end part - Google Patents

Abstract

PURPOSE:To provide a connecting cylinder having protecting and heat insulating effect without exposing the end part of a fluid pipe pulled out of a shield tube. CONSTITUTION:In a connecting cylinder 6 serving for heat insulation and protection of the end part 4a of a fluid pipe 4 piped in a shield tube 3, pulled out of the shield tube 3 and connected to the end connection 2 of a branch pipe 1 through a joint 5, the fluid pipe 4 is inserted through therein, and the joint 5 is covered with one end part 6a, while the other end part is provided with a locking part 6b for locking the outer periphery of the shield tube 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting pipe for a pipe end attached to the end of a fluid pipe through which a fluid such as hot water, water or gas is passed. The present invention relates to a pipe tube for pipe end, which is pulled out and is attached to the end of a fluid pipe connected to a connection port of a branch pipe via a joint, for both heat retention and protection.

[0002]

2. Description of the Related Art Conventionally, a branch pipe is used as an end of a fluid pipe provided in a sheath pipe (hereinafter, a branch header will be described as an example).
To connect to the connection port of, for example, the structure shown in FIG. 7 was adopted. In this conventional structure, a fluid pipe 14 is provided in a sheath pipe 13 that is connected to a supply source such as a water supply tank, has a branch header 11 having a plurality of connection ports 12, and is provided along a wall surface of a building. Is accommodated, one end of the fluid pipe 14 is connected to a fluid drain portion such as a faucet, and the other end 14a of the fluid pipe 14 is branched from the inside of the sheath pipe 13 via a joint 15. It is connected to the connection port 12 of the header 11. A sealing cap 17 is fitted from the outer periphery of the fluid pipe 14 to the outer periphery of the end of the sheath pipe 13, and the end of the sheath pipe 13 is sealed by the sealing cap 17.

In addition, with the diversification of piping construction methods, in the above piping example, the joint 15, the fluid pipe 14 and the sheath pipe 13 are preliminarily connected to the connection port 12 of the branch header 11 at the factory. The so-called prefabricated piping method, in which the piped unit is transported to the site as it is for construction, has come to be used.

[0004]

The former one of the above-mentioned conventional connection structures is connected to the connection port 12 of the branch header 11 in a state where the end of the fluid pipe 14 is pulled out from the inside of the sheath pipe 13. Since the end 14a of the fluid pipe 14 is exposed, there is a problem that the heat retention performance is poor. The sheath tube 13 has a heat insulating effect on itself, and also the branch header 11
Since a heat insulating material is provided in the container, only the end portion of this fluid pipe has not been heat insulated.

On the other hand, in the latter case of the prefabricated piping method, the screw of the joint may be loosened due to external impact or vibration when the piping unit is transported. In addition, there are many cases where multiple contractors come and go at the site, and sometimes there is the possibility of rough handling and accidental loosening of screws. Therefore, there has been a problem that at least the joint connection portion must be protected and the initial assembled state must be ensured.

The present invention has been made in view of the above circumstances, and has an effect of keeping the end portion of the fluid pipe pulled out from the sheath pipe warm, and an error in the joint connection portion after completion of the pipe connection. It is an object of the present invention to provide a pipe for connecting a pipe end, which also has a protective effect of protecting the pipe from loosening again due to external factors.

[0007]

According to the present invention, the end of a fluid pipe connected to a connection port of a branch pipe, which is connected to a connection port of a branch pipe through a joint, is kept warm and protected. A tubular body for inserting the fluid pipe therein, one end of which covers the joint connecting portion, and the other end of which is provided with an engaging portion that engages with the outer circumference of the sheath tube. It is a connection tube for.
It is desirable that the engaging portion with the sheath tube is formed at the lower end of the connecting tube with a convex portion that fits into and is engaged with the concave portion of the uneven surface of the outer periphery of the sheath tube, and is engaged by the engagement of the unevenness. Further, at this time, a sealing member may be interposed in the uneven portion.

[0008] A tubular body for keeping heat and protecting an end portion of a fluid pipe which is piped in the sheath pipe, is drawn out from the sheath pipe, and is connected to a connection port of the branch pipe through a joint,
After connecting the fluid pipe to the connection port, a protective cylinder portion that covers the outer surface of the joint connection portion, and located at the upper end of the protective cylinder portion, deforms when mounted, and locks at the connection port. A connecting pipe for a pipe end portion, which is provided with a locking portion that does not come off, and which has a heat insulating tubular portion that is contracted and extends downward from the protective portion. In the above, after connecting the fluid pipe to the connection port, a sealing tape showing a connection completed state may be attached to the outer surface of the joint connection part extending over the connection port and the joint, and the pipe tube for connecting the pipe end may be mounted thereon. desirable. At this time, the connecting tube may be transparent or translucent so that the sealing tape can be confirmed from the outside.

[0009]

In the pipe for connecting the pipe end portion constructed as described above, since the outer surface of the joint is covered by one end of the pipe and the other end is locked to the outer periphery of the sheath pipe, It is possible to obtain a heat retaining effect and a protective effect for preventing damage to the fluid pipe without exposing the material. At this time, since the engagement with the concavo-convex portion is utilized for the engagement with the sheath tube, the length of the heat retaining portion can be easily adjusted and the workability is improved.

Further, in the case of the prefabricated piping method preassembled in the factory, the locking portion at the upper end is elastically deformed and attached so as not to come off easily from the connection port, and at the same time, the protective cylinder portion covers the joint connection portion, so that it is hit. It also protects against vibrations and the like, and because you cannot hang a tool such as a wrench, you can avoid human mistakes such as accidentally loosening screws. Further, since the protective cylinder is squeezed and connected to the heat retaining cylinder, even if the screws are loosened and the parts come apart, they will not fall down. Further, it is possible to easily confirm whether or not it is in a proper tightened state by visually observing the stuck state of the sealing tape.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a connecting tube for pipe ends according to the present invention, in which a connecting tube 6 has a fluid pipe 4 such as a polybutene pipe inside.
Is formed in a straight tube shape that can be inserted therethrough, and is made of a synthetic resin such as polyethylene. The one end 6a has a diameter that covers the outer periphery of the joint 5 in accordance with the size of the joint 5 so that the joint 5 can be stored. On the other hand, the other end of the connecting cylinder 6 is formed with a locking portion 6b that locks with the outer circumference of the sheath tube 3. In the case of the figure, an annular convex portion 6b protruding toward the inner peripheral side is formed so as to fit into the concave portion of the sheath tube 3, and the position is fixed by fitting the convex portion 6b into the concave portion of the sheath tube. In addition, (a), (b),
(C) shows the construction process.

Next, another example of the locking portion provided on the connecting cylinder is shown in FIG.
~ Shown in FIG. In FIG. 2, a notch 61 is formed in a part of the annular protrusion 61b.
c is provided so that elasticity is awaited at the time of fitting so that the outer circumference of the sheath tube can be mounted more smoothly. Figure 3
The O-ring 7 is interposed in the locking portion 62b so that the O-ring 7 is fitted into the recess of the sheath tube through the O-ring 7, so that the sealing performance can be improved. In FIG. 4, the annular convex portion 63b has a triangular cross section, which is suitable for obtaining a relatively hard fit. In FIG. 5, the connecting cylinder 64 is not a straight pipe but a bellows-like one, and a locking member 74 is interposed between the recess of the connecting pipe and the recess of the sheath pipe. The locking member 74 may also serve as a sealing material.

The connecting cylinder 6 is used in the following state. A branch header 1 having a plurality of connection ports 2 is provided on the outer periphery while being connected to a supply source such as a water tank. A heat insulating material 8 is attached to the outer surface of the branch header 1 to cover the entire surface. On the other hand, the sheath pipe 3 is piped along the wall surface of a building or the like, and the fluid pipe 4 is housed inside the pipe. Then, one end of the fluid pipe 4 is connected to a fluid discharge part such as a faucet (not shown), and the other end is pulled out from the inside of the sheath pipe 3 to the connection port 2 of the branch pipe 1 via the joint 5. It is connected. The connection cylinder 6 has an upper part 6 a at one end covering the outer periphery of the joint 5 and a lower part at the other end being locked to the outer periphery of the sheath pipe 3 to cover the end of the fluid pipe 4 pulled out from the inside of the sheath pipe 3. It is installed to keep warm.

Next, an example of the piping procedure of the fluid pipe will be described taking the case of using the connecting cylinder 6 shown in FIG. 1 as an example. First, as shown in FIG. 1 (a), the sheath pipe 3 is piped along the wall surface of a building, and then the fluid pipe 4 is inserted into the sheath pipe 3, and as shown in FIG. 1 (b). The fluid pipe 4 is pulled out from the end of the sheath pipe 3. Next, the connecting cylinder 6 is fitted from the end of the fluid pipe 4, and the end of the connecting cylinder 6 is lowered to the sheath pipe 3 until the end 4a of the fluid pipe 4 is exposed. Then, as shown in the drawing, the joint 5 is attached to the end 4a of the fluid pipe 4, and the branch pipe 1
The joint 5 is connected to the connection port 2 of. After that, as shown in FIG. 1C, the connection tube 6 is moved to the connection port 2 side along the end 4a of the fluid pipe 4, and the upper end portion 6a of the connection tube 6 covers the outer periphery of the joint 5. And press it against the heat insulating material 8. At the same time, the locking portion 6b of the connecting tube 6 moves on the outer circumference of the sheath tube 3,
It is fitted in a recess at the end of the sheath tube 3 as appropriate. In this state, both ends of the connection heat insulating cylinder 6 are positioned and held by the contact between the heat insulating material 8 and the upper end portion 6a and the engagement between the annular convex portion 6b and the concave portion of the sheath tube 3.

Next, another embodiment of the present invention will be described with reference to FIG. In the figure, the same components as those in the above embodiment are designated by the same reference numerals. The pipe end portion connection tube 65 of the present embodiment includes a protection tube portion 66 that covers the outer surface of the joint connection portion, a locking portion 67 formed at the upper end of the protection tube portion 66, and a lower heat insulation tube portion 68. .

The engaging portion 67 is formed with a claw-shaped portion protruding inward, which can be elastically bent. Since the connection port 2'of the branch header 1 of this example has a quadrangular shape, the connection port 2'has a square-shaped locking claw along the whole. This locking claw is elastically deformed so as to get over the ridge of the connection port 2'during mounting, and is pushed in and mounted on the base portion. afterwards,
The locking pawl self-recovers so that it does not easily come off. Further, the locking portion 67 may be mounted by a large deformation that causes plastic deformation beyond elastic deformation when mounted on the connection port 2 '. Protective tube
66 also has a generally rectangular shape, but it could be a cylinder. Here, the outer surface of the joint connecting portion including the joint 5 and the connection port 2'is covered to protect this portion. Further, since the connecting tube is semi-transparent, the sealing tape 9 attached from the connecting port 2'to the joint 5 is visually inspected to show that the joint is completely connected. is there. The heat retaining tubular portion 68 is a cylinder that is reduced in diameter to be smaller than that of the protective tubular portion 66 and extends downward, and accommodates the outer surface of the sheath tube 3 to enhance the heat retaining effect and ensure it. Here, the engaging portion with the sheath tube 3 is not provided at the lower end, but the engaging portion as in the above example may be provided.

The specific connecting procedure is almost the same as that of the above-mentioned embodiment, but in this case, the place where the piping unit is made in advance in the factory is largely different. The piping unit connects suitable fluid pipes 4 to the respective connection ports 2 ′ of the branch header 1 via joints 5. At this time, the sealing tape 9 is attached, the connecting tube 65 is mounted, and the sheath tube 3 is inserted therein. Then, another joint is connected to the other end of the fluid pipe 4, and finally the fluid pipe is wound into an appropriate size to form a piping unit. still,
A destination label is also attached to the outer surface of the connecting tube to identify whether the fluid pipe goes to the kitchen or the toilet.

[0018]

As described above, in the heat insulating cylinder for the end portion of the fluid pipe according to the present invention, one end covers the outer surface of the joint connecting portion and the other end is locked to the outer circumference of the sheath pipe. Thus, the end of the fluid pipe that is pulled out from the sheath pipe and exposed can be completely covered, and the heat retaining layer continuously formed from the branch pipe and its joint portion can be reliably extended and continued. Further, in the prefabricated pipe, since this connecting cylinder is installed in the factory in advance, it is possible to protect the joint connecting portion and prevent human error. By the above, the heat insulating effect of the entire pipe was improved, and the protection of the terminal portion of the fluid pipe and the pipe connection portion was ensured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a pipe tube for a pipe end according to the present invention, in which (a), (b) and (c) show the construction procedure.

FIG. 2 is a cross-sectional view showing another example of the locking portion of the tube end heat retaining tube.

FIG. 3 is a cross-sectional view showing another example of the locking portion of the pipe end heat retaining tube.

FIG. 4 is a cross-sectional view showing another example of the locking portion of the tube end heat retaining tube.

FIG. 5 is a cross-sectional view showing another example of the locking portion of the tube end heat retaining tube.

FIG. 6 is a cross-sectional view of a pipe tube for a pipe end portion of another embodiment of the present invention after pipe connection.

FIG. 7 is a partial cross-sectional view showing a conventional pipe structure at a pipe end.

[Explanation of symbols]

1 ... Branch pipe 2 ... Connection port 3 ... Sheath pipe 4 ... Fluid pipe 4a ... Terminal 5 ... Joint 6 ... Connection cylinder 7 ... Sealing material 8 ... Heat insulating material 6b, 61b, 62b, 63b, 64b ... Locking portion 9 ... Seal Tape 65… Connection tube 66… Protective tube 67… Locking claw 68… Insulation tube

Claims (3)

[Claims] 1. A tubular body for keeping heat and protecting an end portion of a fluid pipe which is piped in a sheath pipe, is drawn out from the sheath pipe, and is connected to a connection port of a branch pipe through a joint, The fluid pipe is inserted inside, one end covers the joint connection portion,
A connecting tube for a pipe end, characterized in that the other end is provided with an engaging portion for engaging with the outer circumference of the sheath pipe. 2. A cylindrical body for keeping heat and protecting an end portion of a fluid pipe, which is piped in the sheath pipe, is drawn out from the sheath pipe, and is connected to a connection port of a branch pipe through a joint, After connecting the fluid pipe to the connection port, a protective cylinder portion that covers the outer surface of the joint connection portion, and located at the upper end of the protective cylinder portion, deforms when mounted, and locks at the connection port. A connecting tube for a pipe end, comprising: a heat retaining tube portion that has a locking portion that does not come off and that extends downward from the protection portion. 3. After connecting the fluid pipe to the connection port,
The pipe for connecting a pipe end according to claim 1 or 2, wherein a sealing tape showing a connection completed state is attached to an outer surface of the joint connecting portion extending over the connection port and the joint.