JPH09280585A - Coupler structure for temperature keeping pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupler structure in a hot water feeding system of double-pipe structure in which the coupler structure can be easily connected. SOLUTION: In a temperature holding pipe in which an inner pipe 2 having a smaller diameter than that of a water supplying pipe 1 is freely inserted into the supplying pipe 1 for use in supplying either hot water or cold water of which temperature should be kept and a heat generating member 3 is inserted into the inner pipe 2, there are provided a coupler main body 10 having two opposing hollow members 11, 12 integrally and continuously arranged; inner pipe connecting sections 18, 19 arranged at each of the opposing surfaces of both hollow members 11, 12; and supplying pipe connecting sections 20, 21 arranged at each of the surfaces of both hollow members 11, 12 at opposite sides of the inner pipe connecting sections 18, 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat retaining pipe capable of preventing hot water supplied from a water heater or the like from being cooled in the hot water supplying pipe, and a joint structure which can be used when connecting or branching the heat retaining pipe. It is about.

[0002]

2. Description of the Related Art Conventionally, in hot water supply pipes, pipes made of copper, polyethylene, polybutene, etc. have been laid, and the hot water supply pipes are covered with a heat insulating sheet in order to keep the hot water in the hot water supply pipes warm. Alternatively, there has been one in which the periphery of the hot water supply pipe is surrounded by a tubular body made of urethane or foamed resin.

[0003]

However, since these cannot supply heat to the hot water supply pipe, the temperature of the hot water gradually decreases. Therefore, in this type of heat retention method, the hot water stays in the hot water supply pipe without hot water, the temperature of the hot water gradually decreases, and when the hot water is used again, the hot water in the hot water supply pipe with the lowered temperature is used. I just threw it away and waited for hot water to come in. Therefore, the applicant invented the hot water supply pipe system disclosed in Japanese Patent Application No. 7-128174. In this technique, an inner pipe is loosely inserted inside a hot water supply pipe, and a heating element (for example, a heating wire) is inserted through the inner pipe.

Therefore, in the above hot water supply system,
Since it has a double pipe structure with a hot water supply pipe and an inner pipe inside, it is not possible to use ordinary fittings. Also, in new construction, piping under the floor is done first, and the faucet is started up. Since the work is carried out after several days, the hot water supply pipe must be left partially cut off, and a simple connection method or a joint for connection has been desired.

In view of the above points, it is an object of the present invention to provide a joint structure which can be easily connected in a hot water supply system having a double pipe structure.

[0006]

First, according to the present invention, an inner pipe having a diameter smaller than this supply pipe is loosely inserted into a supply pipe for supplying hot water or water to be kept warm. In a heat retaining tube having a heating element inserted therethrough, a joint body in which two opposing hollow bodies are integrally and continuously provided, and an inner pipe connecting portion provided on each of the opposing surfaces of the two hollow bodies. And a supply pipe connecting portion provided on each of both hollow body surfaces opposite to the inner pipe connecting portion.

Further, according to the present invention, an inner pipe having a diameter smaller than that of the supply pipe is loosely inserted into a supply pipe for supplying hot water or water to be kept warm, and a heating element is inserted into the inner pipe. In the heat insulating tube, the joint body is formed by connecting two parallel end portions of the cylindrical hollow body on the side close to each other through an elbow, and stopping the other end of the joint body, and both the hollow bodies. Inner pipe connecting portion formed by projecting on each of the opposing surfaces of the inner pipe and having a diameter capable of adhering the inner pipe to the inside of the joint body, and both hollow bodies on the opposite side of the inner pipe connecting portion. The joint structure of the heat retaining pipe is characterized in that the joint structure of the heat retaining pipe is characterized in that it comprises a supply pipe connecting portion formed on each of the surfaces so as to project to the inside of the joint body, and a hole having a diameter that allows the hot water supply pipe to be in close contact therewith. There is.

Further, the invention in the case of planning a branch is a main pipe continuously piped under the floor, a branch pipe branched from the main pipe to a faucet, and the main pipe inside the main pipe. In a heat retaining tube in which an inner tube having a smaller diameter than that is loosely inserted and a heating element is inserted into the inner tube, a joint main body composed of two facing hollow bodies and a continuous portion integrally continuous with the hollow body , The inner pipe connecting portion provided on each of the facing surfaces of the both hollow bodies, the main pipe connecting portion provided on each of the two hollow body surfaces on the opposite side of the inner pipe connecting portion, and the continuous portion. The gist is a joint structure of a heat retaining pipe, which is characterized in that it is provided with a branch pipe connecting portion provided.

Further, a main pipe continuously piped under the floor, a branch pipe branched from the main pipe to the faucet, and an inner pipe having a diameter smaller than that of the main pipe are loosely inserted in the main pipe. , In the heat retaining tube in which a heating element is inserted into the inner tube, the ends of the two parallel cylindrical hollow bodies which are close to each other are continuous by a cylindrical continuous portion, and the other end is The inner pipe connecting portion formed by projecting on each of the opposing surfaces of the hollow body and the joint body formed by stopping the water, and having a hole having a diameter capable of tightly adhering the inner pipe to the inside of the joint body. And a main pipe connecting portion formed by projecting on both hollow body surfaces on the opposite side of the inner pipe connecting portion, and having a hole having a diameter with which the main pipe can be brought into close contact with the inside of the joint body, Insulation pipe joint characterized by comprising a branch pipe connection part provided in the section The gist of the elephant.

Then, the inner pipe connecting portion and the supply pipe connecting portion or the inner pipe connecting portion and the main pipe connecting portion are engraved on the surface of a male screw portion, and a cap nut screwed to the male screw. There is also a case where it is configured by a cylindrical seal ring which can be sealed by being bent inward in the radial direction while being in close contact with the surface of the male screw portion by being sandwiched by the male screw portion and the cap nut.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. First, the heat retaining structure of the hot water in the hot water supply pipe in which the joint structure of the present invention is used will be generally described. As shown in FIG. 1, an inner pipe 2 is loosely inserted in the hot water supply pipe 1, and further, An electric heating wire 3 covered with an insulator is inserted into the pipe 2 (both ends of the inner pipe are open outside the hot water supply pipe, and are inserted between both open ends). Such an inner pipe 2 is provided by polybutene, and is supported by a linear support member 4 so as to be located at substantially the center of the hot water supply pipe 1. A Y-shaped joint 5 is connected in the vicinity of the water heater (not shown) so that the end of the inner pipe 2 can be projected outward from the water heater 1 so that the hot water is supplied from the water heater. Hot water can be supplied into the pipe 1, and the inner pipe 2 opens outward so that the heating wire 3 can be inserted.

Therefore, as shown in FIG. 2, in the joint body 10 of the present embodiment, two hollow cylindrical bodies 11 and 12 are provided so as to face each other with their axes parallel to each other. , 12 on the same side end with a continuum 13 elbow 1
4 and 15 are connected to connect the hollow insides of both hollow bodies 11 and 12 to each other, and water stop plugs 16 and 17 are provided at the other end portions of both hollow bodies 11 and 12, respectively. The space is sealed and has an integrated structure. And
On the surfaces of the hollow bodies 11 and 12 facing each other, inner pipe connecting portions 18 and 19 each having a small-diameter cylindrical shape are provided so as to communicate with the inside and outside of the joint body 10, and the opposite side thereof. On the surface of the, hot water supply pipe 1 can be connected to the cylindrical hot water supply pipe connection portion 2
Nos. 0 and 21 are provided, and these also communicate with the inside and outside of the joint body 10. Inner pipe connection part 18, 1
Connection of the inner pipe 2 in 9, and hot water supply pipe connection portions 20, 2
The hot water supply pipe 1 in 1 can be connected by sticking with an adhesive or by welding for slightly melting the connecting portion.

With the above-described structure, the end of the hot water supply pipe 1 is connected by the hot water supply pipe connecting portion 20 provided in the one hollow body 11, and the hot water supplied through the hot water supply pipe 1 is supplied. Will be sent from the hollow body 11 to the inside of the hollow of the joint body 10. At this time, the inner pipe 2 penetrates through the end of the hot water supply pipe 1 and the inside of the hot water supply pipe connecting part 20 to form the inner pipe connecting part 18
Can be reached. And this inner pipe connecting portion 1
At 8 the ends of the inner tube 2 are connected and this connection allows the inner tube 2 to be opened outside the hollow body 11. Therefore, the heating element (heating wire covered with the insulator) 3 can be discharged from the inner tube 2 through this opening. Further, the heating element 3 can be inserted into the inner tube 2 from the inner tube connecting portion 19 of the other hollow body 12, and the heating wire 3 can be continuous and the hot water flow path can be continuous. .

Further, as shown in FIG. 3, the branch pipe connection portion 22 is provided in the continuous body 13, so that the route of the hot water supplied can be branched. This is because, as described above, the hot water supplied through the hot water supply pipe 1 is sent from the hollow body 11 to the other hollow body 12 via the continuous body 13, and a part of the continuous body 13 on the way is Hot water can be supplied by opening it. Therefore, as shown in FIG. 4, the branch pipe 23 connected to the branch pipe connecting portion 22 of the joint body 10 is connected to the mixing stopper 30 and hot water can be supplied to the faucet 31. It is supplied to the mixing tap via a water pipe 33 by a conventional fitting 32. Then, hot and cold water is mixed in this mixing tap. Here, at the time of such piping work, the joint body 10 having the branch pipe connecting portion 22 is connected to the underfloor of the place where hot water should be supplied in advance, and the branch pipe 23 is connected to the branch pipe connecting portion 22. The branch pipe 23 is connected to the branch pipe connecting portion 22 at a stage of construction for attaching the mixing stopper 31 and the faucet 31.

It goes without saying that various embodiments can be adopted without departing from the spirit of the present invention. For example, the joint body may be integrally formed,
In this case, vinyl chloride or F.I. R. P. Integral molding is conceivable. In addition, the inner pipe connecting portions 18, 1 of the joint body 10
Regarding the connection between the inner pipe 2 and the inner pipe 2, and the connection between the hot water supply pipe connection portions 20 and 21 and the hot water supply pipe 1, it has been shown in the above embodiment that they are adhered or welded. May be connected. As shown in FIG. 5 (a), this connection is made by engraving male threads on the surfaces of the inner pipe connection portion 18 and the hot water supply pipe connection portion 20, and the seal rings are provided at the respective tips of both connection pipes 18 and 20. 41, 42 can come into contact with each other, the inner pipe 2 or the hot water supply pipe 1 can be tightly inserted into the seal rings 41, 42, and the cap nuts 43, 44 are screwed into the connection parts 18, 20 and tightened. ,
The seal rings 41 and 42 are sandwiched between the tips of the connecting portions 18 and 20 and the cap nuts 43 and 44, so that the seal rings 41 and 42 bend slightly inward, so that the seal rings 41 and 42 can be sealed and the outer side of the inner pipe 2 or the hot water supply pipe 1 can be sandwiched. Yes, it can be fixedly connected.
In the connected state, as shown in FIG. 5B, the hot water supply pipe 1 is connected outward from the cap nut 44 screwed into the hot water supply pipe connection portion 20, and the inner pipe 2 is connected to the outer pipe 1 and the outer pipe 1. Cap nut 4 penetrating the hollow body 11 and screwed into the inner pipe connecting portion 18
3 will be connected outward. In addition, such a connection is the same in the other hollow body 12.

[0016]

As described above, according to the present invention, an inner pipe having a diameter smaller than that of the supply pipe is loosely inserted into the supply pipe for supplying hot water or water to be kept warm. In a heat retaining tube having a heating element inserted therein, a joint body in which two opposing hollow bodies are integrally and continuously provided, and an inner pipe connecting portion provided in each of the opposing surfaces of the both hollow bodies. Since the gist is a joint structure of a heat retaining pipe, which is characterized in that it comprises a supply pipe connecting portion provided on each of both hollow body surfaces on the opposite side of the inner pipe connecting portion, Both the inner pipe and the hot water supply pipe can be connected at the same time in the state of being loosely inserted in the, and the hot water supply pipe is connected to the hot water supply pipe connecting portion,
Since the inner pipe may be connected to the inner pipe connecting portion, it can be easily connected without making a mistake. Further, since the inner pipe can be opened at a position where it can be connected to the inner pipe connecting portion, it is possible to let out a heating element that is inserted into the inner pipe to the outside, and the inside of the inner pipe is supplied with hot water by the inner pipe. Since it is isolated from the hot water flowing inside the tube, the heating element does not come into contact with the hot water. Further, the two hollow bodies facing each other are provided apart from each other, and the heating element can be exposed to the outside of the joint main body by utilizing this gap, which facilitates insertion and maintenance of the heating element.

Further, according to the present invention, an inner pipe having a diameter smaller than that of the supply pipe is loosely inserted into a supply pipe for supplying hot water or water to be kept warm, and a heating element is inserted into the inner pipe. In the heat insulating tube, the joint body is formed by connecting two parallel end portions of the cylindrical hollow body on the side close to each other through an elbow, and stopping the other end of the joint body, and both the hollow bodies. Inner pipe connecting portion formed by projecting on each of the opposing surfaces of the inner pipe and having a diameter capable of adhering the inner pipe to the inside of the joint body, and both hollow bodies on the opposite side of the inner pipe connecting portion. The joint structure of the heat retaining pipe is characterized in that the joint structure of the heat retaining pipe is characterized in that it comprises a supply pipe connecting portion formed on each of the surfaces so as to project to the inside of the joint body, and a hole having a diameter that allows the hot water supply pipe to be in close contact therewith. Therefore, combine the pipes and elbows that are used for normal hot water supply piping. And the can configure the joint body, it is possible to provide a joint that do not quality or on health any problem.

Further, the invention in the case of planning a branch is a main pipe continuously piped under the floor, a branch pipe branched from the main pipe to a faucet, and the main pipe inside the main pipe. In a heat retaining tube in which an inner tube having a smaller diameter than that is loosely inserted and a heating element is inserted into the inner tube, a joint main body composed of two facing hollow bodies and a continuous portion integrally continuous with the hollow body , The inner pipe connecting portion provided on each of the facing surfaces of the both hollow bodies, the main pipe connecting portion provided on each of the two hollow body surfaces on the opposite side of the inner pipe connecting portion, and the continuous portion. Since the gist of the joint structure of the heat insulation pipe is that it consists of the branch pipe connection part provided, the inner pipe and heating wire do not pass through the continuous part of the joint body, so connect to this continuous part. Is done in the same way as a conventional pipe connection. It can be, moreover, since the hot water in the continuous unit passes, it is possible to easily branch the flow path of water by connecting the pipes. In addition, for construction of hot water supply pipes under the floor during new construction, leave the above fittings connected and connect branch pipes to the branch pipe connection part at the time of finishing work to provide mixing taps and faucets. Piping up to the mixing tap can be possible.

Further, a main pipe continuously piped under the floor, a branch pipe branched from the main pipe to the faucet, and an inner pipe having a diameter smaller than that of the main pipe are loosely inserted into the main pipe. , In the heat retaining tube in which a heating element is inserted into the inner tube, the ends of the two parallel cylindrical hollow bodies which are close to each other are continuous by a cylindrical continuous portion, and the other end is The inner pipe connecting portion formed by projecting on each of the opposing surfaces of the hollow body and the joint body formed by stopping the water, and having a hole having a diameter capable of tightly adhering the inner pipe to the inside of the joint body. And a main pipe connecting portion formed by projecting on both hollow body surfaces on the opposite side of the inner pipe connecting portion, and having a hole having a diameter with which the main pipe can be brought into close contact with the inside of the joint body, Insulation pipe joint characterized by comprising a branch pipe connection part provided in the section Since the construction is the gist, the angle at which the branch pipe can be connected will differ depending on the angle of the branch pipe connecting portion provided in the continuous portion, so by preparing the continuous portion having the branch pipe connecting portions of various angles, It will be possible to handle various constructions. Further, since the cylindrical hollow portion and the cylindrical continuous portion are integrally provided by the elbow, it is possible to assemble them at the construction site by preparing only each component.

Then, the inner pipe connecting portion and the supply pipe connecting portion, or the inner pipe connecting portion and the main pipe connecting portion are engraved on the surface of a male screw portion, and a cap nut screwed to the male screw. , A cylindrical seal ring that can be sealed by being bent radially inward while being in close contact with the surface of the male screw portion by being sandwiched by the male screw portion and the cap nut, so that an adhesive such as in the case of sticking Can be prevented from being forgotten to be applied, and a melting device or the like as in the case of welding is unnecessary.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of a hot water supply pipe system.

FIG. 2 is a perspective view of an embodiment of a joint.

FIG. 3 is a perspective view of an embodiment of a joint.

FIG. 4 is an explanatory diagram showing a usage mode.

FIG. 5 is an explanatory diagram showing another connection method.

[Explanation of symbols]

 1 hot water supply pipe 2 inner pipe 3 heating element 4 support member 5 bulging portion 10 joint 11,12 hollow body 13 continuous body 14,15 elbow 16,17 water stop plug 18,19 inner pipe connecting portion 20,21 hot water pipe connecting portion 22 Branch pipe connection 23 Branch pipe 41, 42 Seal ring 43, 44 Cap nut

Claims (6)

[Claims] 1. An inner pipe having a diameter smaller than that of the supply pipe is loosely inserted inside the supply pipe for supplying hot water or water to be kept warm.
In the heat insulation tube which inserts the heating element in this inner tube,
A joint body in which two facing hollow bodies are integrally and continuously provided, an inner pipe connecting portion provided in each of the facing surfaces of the both hollow bodies, and both of the opposite sides of the inner pipe connecting portion. A joint structure for a heat retaining pipe, comprising: a supply pipe connecting portion provided on each surface of the hollow body. 2. An inner pipe having a diameter smaller than that of the supply pipe is loosely inserted inside the supply pipe for supplying hot water or water to be kept warm.
In the heat insulation tube which inserts the heating element in this inner tube,
A joint main body in which the ends on the adjacent sides of two parallel cylindrical hollow bodies are continuous via an elbow, and the other end is water-stopped, and the facing surfaces of the both hollow bodies, respectively. And the inner pipe connecting portion formed with a hole having a diameter that allows the inner pipe to be in close contact with the inner portion of the joint body, and both hollow body surfaces opposite to the inner pipe connecting portion. And a supply pipe connecting portion having a hole having a diameter that allows the hot water supply pipe to come into close contact with the inside of the joint main body, and a joint structure for a heat retaining pipe. 3. A main pipe continuously piped under the floor,
A branch pipe that branches from this main pipe to the faucet and a heat retaining pipe in which an inner pipe having a diameter smaller than that of the main pipe is loosely inserted in the main pipe and a heating element is inserted into the inner pipe. , A joint body constituted by two facing hollow bodies and a continuous portion integrally continuing the hollow bodies, and inner pipe connecting portions provided on each of the facing surfaces of the both hollow bodies,
A heat retaining pipe joint structure comprising a main pipe connecting portion provided on each of both hollow body surfaces opposite to the inner pipe connecting portion and a branch pipe connecting portion provided on the continuous portion. 4. A main pipe continuously piped under the floor,
A branch pipe that branches from this main pipe to the faucet and a heat retaining pipe in which an inner pipe having a diameter smaller than that of the main pipe is loosely inserted in the main pipe and a heating element is inserted into the inner pipe. , A joint main body in which the ends of two parallel cylindrical hollow bodies on the side closer to each other are continuous by a cylindrical continuous portion, and the other end is water-tight, and the two hollow bodies face each other. An inner pipe connecting portion formed by projecting on each of the surfaces and having a diameter capable of closely contacting the inner pipe and penetrating to reach the inside of the joint body, and each of the hollow body surfaces opposite to the inner pipe connecting portion. A heat insulation characterized by comprising a main pipe connecting part formed by projecting a hole having a diameter capable of closely contacting the main pipe and penetrating through the inside of the joint body, and a branch pipe connecting part provided in the continuous part. Pipe joint structure. 5. A male screw portion engraved on the surface of the inner pipe connecting portion and the supply pipe connecting portion, a cap nut screwed to the male screw, and a male screw portion by being sandwiched between the male screw portion and the cap nut. The joint structure for a heat retaining tube according to claim 1 or 2, wherein the joint structure comprises a cylindrical seal ring capable of bending and sealing inward in the radial direction while being in close contact with the surface. 6. The inner pipe connecting portion and the main pipe connecting portion,
A male screw portion engraved on the surface, a cap nut screwed to this male screw, and a cylindrical shape that can be bent and sealed inward while being in close contact with the male screw surface by being sandwiched by the male screw portion and the cap nut. The joint structure for a heat retaining tube according to claim 3 or 4, wherein the joint structure comprises a seal ring.