JPH0626786Y2 - Collecting pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a collecting pipe body in which both end portions of a plurality of plastic tubes are bundled and integrated.

[Conventional technology]

Plastic tubes are used in various industrial fields because they are excellent in molding processability, chemical resistance and the like and are lightweight. These plastic tubes are
Although it is often used as a single pipe material, for example, a collecting pipe body in which a large number of small-diameter fluororesin tubes are bundled and both end portions thereof are integrally formed into a honeycomb shape is disclosed in, for example, Japanese Patent Laid-Open No. As shown in Japanese Patent No. 259898, it is used as a heat transfer tube of a heat exchanger or as a deaeration tube in a deaerator (Saikai Sho 62-27703 proposed by the present applicant).

[Problems to be solved by the device]

By the way, in recent years, shell-and-tube type heat exchangers using these collecting pipes are highly required to be miniaturized due to reasons such as restrictions on installation space. However, such heat exchangers have hitherto been straight pipes (shells).
The collecting pipe is inserted into the shell, and airtightly connected to the shell at the honeycomb-shaped joints at both ends thereof, and one outlet and one outlet are provided at both ends of the outer peripheral surface of the shell for circulating the shell-side fluid. Since it is configured, the heat exchanger itself can be miniaturized to some extent, but since the connection pipes for the shell side fluid and the tube bundle side fluid are arranged in a distributed manner, the connection pipes are bulky, Therefore, there is a problem that the effect is small even if only the heat exchanger is downsized.

In view of these problems of the prior art, the object of the present invention is to provide a collecting pipe body capable of connecting terminals at one place.

[Means for Solving the Problems]

According to the present invention, in order to solve the above-mentioned problems of the prior art, the tube walls are sealed and joined together at one end portion of the plurality of plastic tubes, and the tube walls are folded back at an intermediate portion and the tube wall at the other end portion. A collecting pipe body is formed by sealingly connecting each other and integrally connecting the both end portions.

[Action]

In the collecting pipe body of the present invention, the plurality of plastic tubes are sealed and joined to each other at one end portion, and are folded back at an intermediate portion to seal each other at the other end portion. The two end portions are connected to each other and are integrated so as to be concentric or adjacent to each other. Therefore, for example, by using a joint member having two concentric or parallel flow paths, the fluid can be flown into and out of each plastic tube at one place, so that the connecting pipe can be made compact. Can be put together.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of a collecting pipe body 1 according to the present invention. The collecting pipe body 1 shown in the drawing is bundled so that one end portions of a plurality of plastic tubes 2 are in contact with each other, The tube walls of these end portions are formed into a honeycomb-like airtight end structure by means such as fusion bonding.
Then, each plastic tube 2 is folded back in the middle, and the other end portion is inside the tubular wall of the tubular support body 4 made of plastic, which is fitted below the opening end face 3a of the honeycomb-shaped joint portion 3. The opening 4 is embedded in the end face 4a of the support 4 along the axial direction. That is, these plural plastic tubes 2 are
The other end portion is arranged concentrically with respect to one end portion, and the tube walls are integrated in a sealed state.

In order to manufacture such a collecting pipe body 1, first, one end portions of a plurality of plastic tubes 2 are bundled, a plastic sleeve (not shown) is externally fitted to the end portions, and these are heated to form a honeycomb shape. To form the joint portion 3. In this case, as shown in Japanese Patent Publication No. 46-4228, a pressure difference may be applied between the inside and the outside of the plastic sleeve 2 during heat fusion. Next, the inner hollow portion is formed to have a diameter that fits with the honeycomb-shaped joint portion 3, and a plurality of tube insertion holes are provided at equal intervals along the longitudinal direction on the tube wall as a support plastic. A tubular body consisting of is prepared. Then, the honeycomb-shaped connecting portion 3 formed at one end portion of the plurality of plastic tubes 2 is inserted into the inner space of the tubular body 4, and the other end of each plastic tube 2 folded back at a midway portion. The part is fitted into the plurality of tube insertion holes, and these are integrally bound by heating or the like. At this time, a pressure difference may be applied between the inside and the outside of the plastic tube 2 as needed, as in the case of forming one end portion. In this way, the plurality of plastic tubes 2 are integrated by sealingly connecting the tube walls to each other in a concentric arrangement of the two end portions while maintaining a good open state.

Next, a usage mode of the collecting pipe body 1 of the embodiment shown in FIG. 1 will be described. FIG. 2 is a partial vertical cross-sectional side view when the collecting pipe body 1 is applied to a shell-and-tube type heat exchanger.
In the figure, a collecting pipe body 1 includes a cylindrical portion 12 provided in the center of an upper lid 11 of a bottomed cylindrical plastic shell 10.
Further, the upper portion of the plastic tube 2 is housed in such a state that the upper portion of the plastic tube 2 projects from the supporting body 4 for sealingly coupling the other end portion. The inner diameter of the tubular portion 12 is formed to be substantially equal to the outer diameter of the support body 4 of the collecting pipe body 1, and further, the male screw portion 13 is provided on the outer peripheral surface of the tubular portion 12, and the tip end thereof forms the tapered surface 14. Has become. A tubular joint member 20 having a tube-side fluid outlet 21 on the outer peripheral surface is screwed into the tubular portion 12, and the tapered surface 22 provided on the inner peripheral surface and the taper of the tubular portion 12 are tapered. Due to the engagement of the surfaces 14, the tip portion of the tubular portion 12 of the shell 10 is reduced in diameter to tighten and seal the support body 4 of the collecting pipe body 1 from the outer periphery. In addition, a small diameter portion 23 that fits into the honeycomb-shaped joint portion 3 formed at one end portion of the collecting pipe body 1 is provided on the other end side of the joint member 20, and the outer peripheral surface of the small diameter portion 23 is further provided. The male screw portion 24 is provided, and the tip thereof is a tapered surface 25. Then, the honeycomb-shaped connecting portion 3 of the collecting pipe body 1 is sealed from the outside by a tightening nut 26 screwed into the small diameter portion 23 of the joint member 20. Further, in the embodiment, a pipe joint 27 of the same coupling method as the joint member 20 is connected to the tip of the honeycomb-shaped joint 3 formed at one end of the collecting pipe 1, and the flow of the fluid on the tube side is connected. It is the entrance. The upper lid 11 of the shell 10 is provided with an inlet 15 and an outlet 16 for the shell side fluid.

In the heat exchanger having such a configuration, the tube-side fluid flowing from the pipe joint 27 enters each plastic tube 2 from the honeycomb-shaped joint portion 3 formed at one end portion of the collecting pipe body 1 to collect the collecting pipe body 1. Down the tube located on the center side of the tube, change the direction at the folded portion to raise the tube located on the outside, and join at the exit of the support body 4 for sealingly connecting the tube walls of the other end portion, It flows out from an outlet 21 provided on the side surface of the joint member 20. The shell-side fluid enters the shell 10 through the inflow port 15 provided in the upper lid 11 of the shell 10 and flows through the inner hollow portion 17 of the shell 10 while flowing inside the collecting pipe body 1. It exchanges heat with the fluid and is discharged from the outlet 16. It is of course possible to reverse the inlets and outlets of the tube-side fluid and the shell-side fluid.

As described above, in the collecting pipe body 1 according to the present invention, since the plurality of plastic tubes 2 are sealed and joined to each other at the end portions of the tube walls, and the joined portions are concentrically arranged, For example, when the heat transfer tube is attached to the shell 10 as a heat transfer tube, the connection pipes for the heat transfer tube side fluid are concentrated at one location of the shell 10, so that the connection pipe can be made smaller than the conventional one. Furthermore, since the plastic tube 2 is folded back and arranged, it can be accommodated in the inner space 17 of the shell 10 at a high density, and the size of the shell 10 can be reduced. Therefore,
Together with the integration of the above connecting pipes, it greatly contributes to space saving. In the examples, the plastic tubes 2 are arranged such that the other end portion side folded back in the middle part is juxtaposed along the outside of the tube bundle on the one end portion side, but the other end portion side is It may be spirally wound around the outer circumference of the tube bundle on the terminal portion side, in which case the shell 10 is further miniaturized.

FIG. 3 and FIG. 4 are perspective views of a terminal portion showing other different embodiments of the collecting pipe body according to the present invention. The same parts as those in the first embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The collecting pipe body 30 shown in FIG. 3 seals the end faces 31a of the honeycomb-shaped joint portions 31 formed on one end portion of the plurality of plastic tubes 2 and the tube walls of the other end portion of the plastic tubes 2. It is integrally formed so that the end face 4a of the support body 4 to be fixedly coupled is in the same plane,
In this case, an annular groove 32 for receiving the seal ring is provided between the openings of both end portions.

In the collecting pipe 40 shown in FIG. 4, a through hole 42 is provided in the central portion of the support 41, and one end portion of the plastic tube 2 is arranged at equal intervals around the through hole 42. The other terminal portion is arranged around the one terminal portion at equal intervals. An annular groove 43 is provided on the end face of the support 41 as in the case of FIG. In order to manufacture this collecting pipe body 40, a plurality of tube insertion holes for inserting one end portion of the plastic tube 2 are provided around the through hole 42, and the other end portion is provided outside these tube insertion holes. It is possible to integrate both end portions in one step by heating both end portions of each plastic tube 2 in a support body 41 in which tube insertion holes for inserting a tube are concentrically provided. it can. Here, the through hole 42 is
This is for inserting a heater during heat fusion to make heating uniform, but it is not always necessary depending on molding conditions.

Although not shown, the collecting pipe body 30 of the embodiment shown in FIG. 3 and the collecting pipe body 40 of the embodiment shown in FIG. It can be applied to a heat exchanger and can be used for various applications such as a degassing pipe in addition to the heat exchanger.

Further, in the above-mentioned embodiment, the connecting portions at both ends of the plurality of plastic tubes 2 are integrated in a concentric arrangement, but it is not always necessary to arrange them concentrically. After making both end portions into a honeycomb-shaped connecting portion, the connecting portions are inserted into a cylindrical support body having holes to be fitted into these connecting portions, which are opened at two positions at appropriate intervals in the axial direction, and these are inserted. They may be integrated by heat fusion or the like.

[Effect of device]

As described above, according to the present invention, a plurality of plastic tubes are sealed and joined to each other at one end portion of the tube walls, and are folded back at an intermediate portion,
Since the tube walls are sealed and coupled to each other at the other end portion and the two end portions are integrated into a collecting pipe body, the pipe body is placed in a container such as a heat exchanger or a deaerator. When it is used by storing it, it can be stored in high density, which not only helps to downsize the device, but also can connect the pipes to the collecting pipe in one place, so it does not disturb the surroundings of the device. The present invention is not limited to the above-mentioned embodiment, and the number and arrangement of plastic tubes, the shape of the support, or the like can be applied to the present invention. Various changes can be made within the technical idea.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a collecting pipe body according to the present invention, FIG. 2 is a partial vertical side view showing a usage mode of the collecting pipe body of the embodiment shown in FIG. 1, and FIGS. FIG. 9 is a perspective view of a terminal portion showing another embodiment of the collecting pipe according to the present invention. 1,30,40: Collecting pipe body, 2: Plastic tube, 3,31: Honeycomb-shaped connection part, 4,41: Support body, 10: Shell, 20: Joint member.

Claims (1)

[Scope of utility model registration request] 1. A tube wall is sealed and connected to each other at one end portion of a plurality of plastic tubes,
A collecting pipe body that is folded back at a midway portion and seals and joins the tube walls to each other at the other end portion, and integrally joins both end portions.