JP2000120116A - Water/hot-water feed pipe and piping system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent uncomfortable impact sound inside a pipe and uncomfortable impact sound of the pipe with a building frame or the like from generating by winding foaming plastic on the outer circumference of a water flow pipe made of flexible plastics. SOLUTION: For a water flow pipe 2, a pipe similar to that used for a customary sleeve pipe header system is used, and a pipe made of material having flexibility made of metal, synthetic resin, inorganic material, or these composite material is used. Next a cover 3 made of foaming plastic is wound on the outer circumference of the water flow pipe 2, and the foaming plastic has heat insulation property and flexibility, the further it is relatively soft material. Next because the cover 3 is made of relatively soft material, uncomfortable impact sound can be prevented from generating due to collision of the water flow pipe 2 with the inner face of the cover 3 by sudden rise of inner pressure of the water flow pipe 2, and even when a water/hot-water feed pipe 1 is at the worst vibrated by water hammer and collides with a building frame or the like, the impact is lightened and uncomfortable impact sound can be prevented from generating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply pipe and a piping system for a building, and more particularly to a hot water supply pipe and a piping system for a detached house.

[0002]

2. Description of the Related Art Conventionally, pipes used for water supply and hot water supply equipment for buildings include cast iron pipes, steel pipes, hard vinyl chloride pipes, copper pipes, and the like.
A rigid pipe such as a lead pipe is generally used, and a straight pipe made of such a material is connected with a joint such as an elbow to form a hot water supply pipe. However, such a piping method is cumbersome to construct, and when applied to a reinforced concrete apartment house, etc., if the piping is embedded in the skeleton, the piping will be damaged if the inner surface of the pipe is corroded or deteriorated. It was impossible to update. Therefore, in recent years, there has been an increasing number of cases in which the pod sheath header method is adopted as a piping method for a reinforced concrete apartment house or the like, with emphasis placed on labor saving of construction and renewability of the piping.

[0003] The sheath tube header system is a system in which a resin tube passed through a sheath tube is used to pipe from a header installed in a pipe shaft, a room, or the like, to each water supply hot water tap in a octopus-like manner. In this method, a resin pipe is inserted into a bellows-shaped sheath placed in advance, and the resin pipe is connected to a header, and the resin pipe is connected to each water tap. According to such a sheath tube header method, there is no occurrence of rust or corrosion, fewer joints, no risk of water leakage, and less fluctuation of flow rate during simultaneous use than when using a hard cast iron tube or the like. There are merits such as that the pipe can be renewed, the degree of freedom of the pipe route is high, and that water hammer hardly occurs. Therefore,
Recently, there has been an increasing movement to apply such excellent sheath and pipe header methods to detached houses as well as reinforced concrete apartment houses.

[0004]

However, when such a sheath-tube header method is applied to a detached house or the like as it is, there are the following problems. That is, (1) In a reinforced concrete apartment house, the sheath pipe is embedded in the slab concrete or rolled on the slab concrete on the same floor, but in any case, since it is a planar piping route, The tube does not need to be bent much, and it is possible to draw a curve with a small curvature when bending. On the other hand, especially in the case of detached houses, it is necessary to connect the pipes to the floor and the wall because the pipes need to be connected to the second and higher floors. Since the pipe must be bent sharply in many cases, the pipe cannot be passed, and the advantage of the present method, that is, the "renewability of the pipe" cannot be enjoyed.

(2) Since the sheath tube is relatively hard and has a larger diameter than the resin tube for the convenience of passage, there is a gap between the two and it is not fixed at all. When the pipe is closed suddenly, the resin pipe moves in the sheath due to an increase in the pressure in the pipe, and the resin pipe collides with the inner surface of the sheath to generate an unpleasant collision sound. In addition, it is possible to prevent this unpleasant collision sound by wrapping the silencing tape around the outer peripheral surface of the resin pipe and closing the gap with the inner peripheral surface of the sheath, but this makes the pipe work practically impossible. After all, "the renewability of the pipe" cannot be enjoyed. In addition, it is possible to increase the sheath diameter and shorten the piping distance, and further reduce the number of bends or bend them gently to enable pipe work. This imposes some restrictions and is virtually impossible.

(3) Since the sheath tube has low dew and cold protection,
When used in cold regions, it is necessary to take measures such as wrapping a heat insulating material around the sheath. Such measures are troublesome and have the disadvantage of increasing the outer diameter of the tube.

(4) Since the sheath is relatively hard, if the tube vibrates due to a water hammer and collides with a building or the like, an unpleasant collision sound is generated.

(5) The resin tube is liable to be deteriorated by ultraviolet rays, and the durability is likely to be reduced due to an external injury. Therefore, through manufacturing, transportation, storage, on-site construction, etc.,
There is a high risk that the performance of the resin tube will be degraded due to, for example, trauma.

In view of the above problems, the present invention makes it possible to enjoy advantages other than the "renewability of a pipe" of a sheath pipe header system in a detached house, and to provide an unpleasant collision sound and a pipe inside the pipe. It is an object of the present invention to provide a hot-water supply pipe and a piping system which can prevent unpleasant collision noise between a building and a building frame, and which can easily and effectively increase dew-proofing, cold-proofing, UV resistance and durability.

[0010]

That is, the invention according to claim 1 is a water supply hot water supply pipe characterized in that a foamed plastic is wound around an outer periphery of a water flow pipe made of flexible plastic. Further, the invention according to claim 2 is a header installed in a pipe shaft of a building, inside a room, or the like, and a water supply hot water supply pipe according to claim 1 that extends like an octopus from the header to each water supply hot water tap. It is a piping system characterized by comprising.

Since the hot water supply pipe having such a structure uses a water supply pipe made of a flexible plastic, if this is used as a sheath header type pipe, compared with a case using a hard cast iron pipe or the like, The advantages such as no rust or corrosion, few joints and no fear of water leakage, little fluctuation of flow rate at the time of simultaneous use, high flexibility of piping route, and less occurrence of water hammer can still be enjoyed.
In addition, since the hot water supply pipe has a double structure in which relatively soft foamed plastic is wound around the outer periphery of the water pipe, unpleasant collision noise inside the pipe and unpleasant collision between the pipe and the building frame. Generation of sound can be prevented. Furthermore, foamed plastic is excellent in dew and cold protection, and since it is wound around the outer periphery of the water pipe, it is possible to secure dew and cold protection work, and the outer diameter of the entire pipe is so large. It can be used in cold regions without it. By mounting foamed plastic on the outer circumference of the water pipe in advance, the water pipe is protected from ultraviolet rays and trauma, so that the performance of the water pipe main body can be maintained even after manufacturing, transportation, storage, on-site construction, etc. it can.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description,
The same reference numerals are used for the same elements, and duplicate description will be omitted.

(1) Hot Water Supply Pipe FIG. 1 is a partially cutaway perspective view showing the structure of a hot water supply pipe according to the present invention, wherein reference numeral 1 denotes a hot water supply pipe, reference numeral 2 denotes a water pipe.
Reference numeral 3 indicates a cover made of foamed plastic.

Here, the water pipe 2 may be the same as that used in a conventional sheath pipe header system, and may be made of a metal, a synthetic resin, an inorganic material, or a flexible material made of a composite material thereof. What consists of a material provided with is used. Also, it is necessary to have heat resistance of about 100 ° C. so that hot water can be supplied, and when it is used in a cold region, it has cold resistance of about −20 ° C. so as not to be damaged by freezing. You also need.

[0015] A cover 3 made of foamed plastic is wound around the outer periphery of the water pipe 2. Here, the material of the cover 3 is made of foamed plastic.
This is because the foamed plastic has heat insulation and flexibility, and is a relatively soft material. Therefore, cover 3
Has heat insulating properties, it is possible to prevent frost damage when the hot water supply pipe 1 is used in a cold region or the like, and since the hot water supply pipe 1 has flexibility, the free deformation capability of the hot water supply pipe 1 is ensured. Furthermore, since the cover 3 is made of a relatively soft material, it is possible to prevent a phenomenon that the water pipe 2 collides with the inner surface of the cover 3 due to a sudden increase in the pipe pressure of the water pipe 2 and generates an unpleasant collision sound. In addition, even when the water supply pipe 1 vibrates due to a water hammer and collides with a building or the like of a building, the impact can be relieved and an unpleasant collision sound can be prevented from being generated. .

Further, by attaching the cover 3 to the outer periphery of the water pipe 2 in advance in the manufacturing stage, the water pipe 2 can be protected from damage and exposure to ultraviolet rays even after manufacturing, transportation, storage, construction on site, and the like. The performance of the water pipe 2 can be maintained. As an example of a foamed plastic exhibiting such a function, polypropylene is typical,
The present invention is not limited to this.

The outer surface of the cover 3 is cross-linked and embossed. The cross-linking treatment is for imparting antiseptic properties and chemical resistance, and the embossing treatment is for considering workability and aesthetics.

Further, it is effective to form the cover 3 into a multi-layer structure and use a material having a high heat-shielding property for the inner surface thereof. This is because hot water needs to pass through the water pipe 2.

Since the cover 3 is previously wound around the outer periphery of the water pipe 2 in a factory or the like, the cover 3 is carried to the site in a completed state as the hot water supply pipe 1. This is to improve workability by minimizing on-site work. Further, the thickness of the cover 3 is a minimum thickness in consideration of convenience of design and construction and heat insulation performance. This is because if the film is wound thicker than necessary, the material will be wasted and it will not fit well in the building.

(2) Piping Method Next, a description will be given of a piping method according to the present invention in which the water supply / hot water supply pipe 1 described above is used in place of a conventional sheath pipe type pipe. FIG. 2 is a piping route diagram showing one embodiment of the piping system according to the present invention. Here, reference numeral 4 denotes a water pipe, reference numeral 5 denotes a water tap with a saddle, reference numeral 6 denotes a meter valve,
Reference numeral 7 denotes a check valve, reference numeral 8 denotes a water heater, reference numerals 9a and 9b denote a water supply header and a hot water supply header, respectively, and reference numerals 10a and
10b shows a water tap and a mixing tap, respectively. Further, here, the hot water supply pipe 1 through which water passes is indicated as a water supply pipe 1a, and the hot water supply pipe 1 through which hot water passes is indicated as a hot water supply pipe 1b.

As shown in the figure, water drawn from the water pipe 4 by the faucet with saddle 5 passes through the meter valve 6 and the check valve 7, a part of the water is supplied to the water heater 8, and the rest is supplied to the water heater 8. It reaches the water supply header 9a. The water that has reached the water heater 8 is heated to become hot water, and reaches the hot water supply header 9b through the hot water supply pipe 1b.
The water that has reached the water supply header 9a is supplied to a plurality of water supply pipes 1.
a, and flows out of the water faucet 10a or the mixing faucet 10b, respectively. Similarly, the hot water that has reached the hot water supply header 9 b branches off into a plurality of hot water supply pipes 1 b and flows therethrough.
Flows from 0b.

As described above, the configuration of the present piping system is substantially the same as the conventional sheath tube header system, except that the water supply pipe 1a and the hot water supply pipe 1b having the above-described configuration are used as the pipes.
Therefore, in consideration of the fact that the water supply pipe 1a and the hot water supply pipe 1b also include the water pipe 2 having the same structure as that of the conventional sheath pipe header system as described above, even in the present piping system, the conventional sheath pipe header system is used. It is clear that almost the same advantages can be obtained.

FIG. 3 shows a water supply pipe 1 a and a water supply header 9.
a is a partially broken perspective view showing a connection state with a water tap 10a. As shown in the figure, the water supply pipe 1a and the water supply header 9a
Is connected by a connection joint 11, and the connection between the water supply pipe 1a and the water tap 10a is the same. Further, the water supply pipe 1a is fixed on the slab S of the building with the saddle fitting 12. However, the shapes of the connection joint 11 and the saddle fitting 12 are as follows.
The shape is not limited to the one shown in the figure, and other shapes may be used. Also, an appropriate connection is made in consideration of other design conditions.

The construction of the present piping system described above is carried to the site in a state where the water / hot water supply pipe 1 is completed, so that it is closer to the piping method using hard pipes rather than the conventional sheath pipe method. The renewability of the pipe, such as the pod header method, has been lost. However, since the number of joints is small and a flexible water pipe is used, the pipe can be easily renewed as compared with the piping method using a hard pipe.

Note that the piping system according to the present invention is not limited to the present embodiment, but can be appropriately changed according to design conditions and the like. For example, the mixing faucet 1 in FIG.
0b may be a separate water tap and hot water tap, and the water supply pipe 1a rolling on the slab S in FIG.
May be embedded in the slab S. Further, in consideration of the convenience of construction, it is desirable to make a contrivance such that the outer surface of the water supply pipe 1a is colored in blue and the outer surface of the hot water pipe 1b is colored in red.

[0026]

Since the water supply pipe according to the present invention uses a water pipe made of flexible plastic, if it is used as a sheath pipe type pipe, it will be difficult to use a hard cast iron pipe or the like. Compared to other advantages, there is no rust or corrosion, fewer joints, no risk of water leakage, less fluctuation in flow rate during simultaneous use, higher flexibility in piping routes, less water hammer, etc. it can.
In addition, since the hot water supply pipe has a double structure in which relatively soft foamed plastic is wound around the outer periphery of the water pipe, unpleasant collision noise inside the pipe and unpleasant collision between the pipe and the building frame. Generation of sound can be prevented. Furthermore, foamed plastic is excellent in dew and cold protection, and since it is wound around the outer periphery of the water pipe, it is possible to secure dew and cold protection work, and the outer diameter of the entire pipe is so large. It can be used in cold regions without it. By mounting foamed plastic on the outer circumference of the water pipe in advance, the water pipe is protected from ultraviolet rays and trauma, so that the performance of the water pipe main body can be maintained even after manufacturing, transportation, storage, on-site construction, etc. it can.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing the structure of a hot water supply pipe according to the present invention.

FIG. 2 is a piping route diagram showing an embodiment of a piping system according to the present invention.

FIG. 3 is a partially broken perspective view showing a connection state of a water supply pipe, a water supply header, and a water tap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hot water supply pipe 1a ... Water supply pipe 1b ... Hot water supply pipe 2 ... Water supply pipe 3 ... Cover 4 ... Water supply pipe 5 ... Water tap with saddle 6 ... Meter valve 7 ... Check valve 8 ... Water heater 9a ... Water supply header 9b ... Hot water supply header 10a ... water supply faucet 10b ... mixed water faucet 11 ... connection joint 12 ... saddle metal fittings S ... slab

Claims (2)

[Claims] 1. A hot-water supply pipe characterized in that a foamed plastic is wound around an outer periphery of a water-supply pipe made of flexible plastic. 2. A water supply hot water supply pipe according to claim 1, further comprising: a header installed in a pipe shaft of a building, in a room, or the like; And piping system.