JP3045392B1 - Water supply system for cold regions - Google Patents

Abstract

An object of the present invention is to provide a cold district water supply facility which is easy to operate and requires a small installation space. A primary pipe (1) is provided with a box (18).
2, part of cold water drainer 14, cold water header 1
6. A part of the secondary pipe 22a for hot water, the hot water draining device 3
2. Hot water connection pipe 36 and hot water header 34
Are housed in a box.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a water supply system for cold regions. More particularly, the present invention relates to a cold district water supply system that can be easily operated and requires a small installation space.
In addition, the present invention relates to a cold district water supply facility capable of delaying the freezing time of cold water or hot water in a water supply device or piping.

[0002]

2. Description of the Related Art In cold regions, a water drainage plug is generally installed below the freezing depth to prevent freezing of water in a water pipe. In use, the drain valve drains water from the water pipe by operating from the water supply state to the water drain state,
This is to prevent freezing of water in the water pipe.

[0003] Fig. 7 shows an example of a conventional cold district water supply system provided with such a water tap. The water supply system 100 shown in FIG. 7 is connected to a water main (not shown).
Next pipe 102 and drain plug 1 connected to primary pipe 102
04 and 2 for cold water from the drain valve 104 to the water heater 108
From the next pipe 106 and the water heater 108, a mixing tap 112 such as a vanity table 112 or a sink 114 installed indoors
a, a hot water secondary pipe 110 for supplying hot water to the hot water supply 114a. The water supply system 100 further includes a primary pipe 102
From another water tap 116 connected to the
Mixing faucet 112a such as vanity table 112 or sink 114,
And a secondary pipe 118 for chilled water for supplying chilled water to 114a.

On the other hand, as another example of a conventional water supply system for cold regions, a water supply system using a header (branch joint) system is known. Referring to FIG. 8, a description will be given of a piping system 120 using a header method. Generally, the piping system is a primary piping 1 connected to a water main (not shown).
22, a drain plug 124 connected to the primary pipe 122,
A cold water secondary pipe 126 connected to the water drainage plug 124 and reaching to the ceiling, a cold water header 128 disposed behind the ceiling and connected to the cold water secondary pipe 126, and a cold water secondary pipe 1
26, a hot water secondary pipe 132 connected to the hot water heater 130 and reaching the ceiling, a hot water header 134 arranged behind the ceiling and connected to the hot water secondary pipe 132, It has. From the cold water header 128 and the hot water header 134,
6 and a mixing tap 140 such as a sink 142 or a sink 142 installed indoors via the hot water supply pipe 138.
a, 142a are supplied with cold water and hot water.

[0005]

However, in the above-mentioned water supply system 100, since a large number of water taps must be installed, the cost is high and a space for installing a large number of water taps is required. In addition, at the time of draining, the mixing taps 112a and 114 of the vanity 112 and the sink 114
a is opened, and the water taps 104 and 116 are operated from the water supply state to the water discharge state.
A faucet 119 is used to discharge the water indicated by hatching in the secondary pipe 118 for cold water and the secondary pipe 110 for hot water.
Must be opened, and the operation is extremely complicated.

On the other hand, in the above-mentioned water supply equipment 120, the number of drain plugs to be installed may be one, but a space for installing a header behind the ceiling is required. Further, at the time of draining water, similarly to the water supply equipment 100, the mixing taps 140a and 142a must be opened, the drain tap 124 must be operated from the water supply state to the drained state, and the faucet 144 must be opened. However, compared to the case of the water supply system 100, there is a problem that the operation of only one water drainage plug is reduced and the operation is still extremely complicated.

Accordingly, an object of the present invention is to provide a cold district water supply facility which is easy to operate and requires a small installation space.

[0008]

Means for Solving the Problems According to claim 1 of the present application,
A primary pipe connected to the water main, a chilled water draining device connected to the primary piping, a chilled water header connected to the chilled water draining device, and a chilled water header via the chilled water secondary piping. A cold district water supply system comprising a connected hot water supply device, a hot water secondary pipe from the hot water supply device to the hot water drainage device, and a hot water connection piping connecting the hot water drainage device and the hot water header, A box is provided, and a part of the primary pipe, a drain for cold water, a header for cold water, a part of the secondary pipe for hot water, a drain for hot water, a connecting pipe for hot water, and a header for hot water are provided in the box. It is characterized by being housed in a.

According to a second aspect of the present invention, in the cold district water supply system, at least one elbow portion is provided in the hot water secondary pipe housed in the box. It is characterized by having.

According to a third aspect of the present invention, there is provided a water supply system for a cold region according to the first or second embodiment, wherein a heating element comprising a tape heater or a panel heater is disposed in the box. It is.

[0011]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. A water supply system for a cold region according to a preferred embodiment of the present invention, which is generally indicated by a reference numeral 10 in FIG. 1, is buried below the freezing depth and connected to a water main (not shown).
, A cold water drain valve 14 connected to the primary pipe 12
And a cold water header 16 connected to the cold water drain valve 14.

The cold district water supply system 10 also includes a box 18 having at least a lower portion buried underground.
A part of the next pipe 12, a cold water drain valve 14, and a cold water header 16 are housed in a box 18. A heat insulating material 20 is arranged on at least the top wall and the side wall of the box 18. An inspection lid 18a is provided on the top wall of the box 18.

From the cold water header 16, the water heater 22, the vanity stand 24 installed indoors, the sink 2
6, secondary facilities 22a, 24a, 26a, 28a, and 30a for cold water are respectively extended to facilities such as a bath 28 and a toilet 30.

A hot water secondary pipe 22b extends from the water heater 22 into the box 18, and is connected to a hot water drain valve 32 disposed in the box 18. A hot water header 34 is arranged in the box 18, and the hot water drain valve 32 and the hot water header 34 are connected by a hot water connection pipe 36. Since a part of the secondary pipe 22b for hot water is housed in the box 18,
The temperature drop in the box 18 is delayed by the hot water flowing in the hot water secondary pipe 22b. In order to further delay the temperature drop in the box 18, it is preferable to increase the length of the hot water secondary pipe 22b accommodated in the box 18. This is, for example, the secondary pipe 2 for hot water in the box 18.
This is achieved by providing at least one elbow portion in 2b.

From the hot water header 34, the toilet table 2
4. To each facility such as sink 26, bath 28, etc.
4b, 26b, 28b extend respectively.

FIG. 5 is a sectional view showing the cold water drain valve 14 in a water supply state. Drain valve for cold water 1
4 is a main body 14a, an inlet 14b through which cold water flows into the main body 14a, and an outlet 1 through which cold water flows out from the main body 14a.
4c.

A spindle 14e having an operation handle 14d attached at one end is housed in the main body 14a. A male screw part (not shown) provided on the spindle 14e is connected to a female screw part (not shown) provided on the main body 14a.
By rotating the handle 14d (and thus the spindle 14e),
The spindle 14e can be moved up and down in the main body 14a. A packing 14f is mounted on the other end of the spindle 14e. In the water supply state shown in FIG. 5, the packing 14f is in close contact with the inside of the main body 14a, the inflow port 14b and the outflow port 14c communicate with each other, and the communication with the drain valve 14g provided at the lower portion of the main body 14a is cut off. I have.
When the cold water drain valve 14 is drained, the communication with the inlet 14 and the outlet 14c is cut off, and the drain valve 14
g and the outlet 14c communicate with each other.

FIG. 6 is a sectional view showing the hot water drain valve 32 in a water supply state. Hot water drain valve 3
2 has a main body 32a, a hot water secondary pipe 22b, and a hot water supply port 32b communicating with the hot water connecting pipe 36. A spindle 32e having an operation handle 32d attached to one end is housed in the main body 32a. A male thread (not shown) provided on the spindle 32e is screwed into a female thread (not shown) provided on the main body 32a, thereby rotating the handle 32d (therefore, the spindle 32e). The spindle 32e can be moved up and down in the main body 32a. A packing 32f is mounted on the other end of the spindle 32e. In the hot water supply state shown in FIG. 6, the packing 32f is in close contact with the inside of the main body 32a, and the communication between the drain valve 32g provided at the lower part of the main body 32a and the hot water supply port 32b is shut off. When the hot water drain valve 32 is in a drained state, the hot water supply port 32b and the drain valve 32g communicate with each other.

The above-described structures of the cold water drain valve 14 and the hot water drain valve 32 are known.

In the present specification, “hot water” means hot water heated by the hot water supply device 22, and “cold water” means water that is not heated by the hot water supply device 22. . In each figure, a solid line with an arrow indicates a pipe for cold water, and a broken line with an arrow indicates a pipe for hot water.

The drain valve 1 of the cold water drain valve 14 is also provided.
On the bottom wall of the box 18 located below the location where the 4 g and the drain valve 32 g of the hot water drain valve 32 are provided, the cold water and the hot water discharged from the drain valves 14 g and 32 g at the time of draining the outside of the box 18. To be drained to
Openings 18b and 18c are provided.

Next, an experiment performed to verify the heat retaining effect of the box 18 will be described. First, a heat insulation box (external dimensions of 35 mm in height) covered with a heat insulation material layer of 20 mm thickness
0mm, width 230mm, height 270mm, wall thickness 20m
m) were prepared. Then, in one heat retaining box A, an iron container (diameter 130 mm, height 180 mm) containing about 2000 ml of hot water at 50 ° C. was put, and nothing was put in the other box B. These two boxes A and B were placed in a freezer, and the temperature drop time in each box was measured. The initial temperature in the freezer is 7 ° C.
In the experiment, the temperature in the freezer was set to -10 ° C.

As a result of the experiment, the time required for the temperature in the box to reach 0 ° C. was about 10.5 hours in Box A, while it was about 15 minutes in Box B. Also,
The time required for the hot water in the iron container of Box A to reach 0 ° C. was about 15 hours. From the above experimental results,
It was found that the presence or absence of a heat source in the heat retaining box greatly affected the temperature drop time in the box.

The present invention is not limited to the above embodiments of the invention, and various modifications are possible within the scope of the invention described in the claims. It goes without saying that it is included in.

For example, in the above-described embodiment, the drain valves 16 and 32 are manually operated. However, a known electric remote controller is attached to the drain valves 16 and 32 to operate the drain valves 16 and 32 from a remote position. May be performed.
Instead of the hot water drain valve 32, an ordinary faucet may be attached. Further, a gate valve and a faucet may be attached in place of the cold water drain valve 16. In this case, if there is no need to supply water during cold weather, the gate valve is closed, and then the faucet is opened to drain water. In addition,
In this specification, the term "cold water drainage device" means that in addition to the cold water drainage valve 16, a combination of the above-described gate valve and faucet is included. Also, "Water draining device"
This means that in addition to the hot water drain valve 32, an ordinary faucet is included.

Further, in order to increase the heat retaining effect, the secondary pipe 22b for hot water accommodated in the box 18 may be replaced with a coiled small-diameter copper pipe or the like. Further, a heating element such as a tape heater or a panel heater may be arranged inside the box 18. Further, the volume of the header for hot water may be increased, thereby increasing the amount of hot water stored in the header itself, and the heat retaining action in the box 18 may be increased.

Further, in the above embodiment, the box 1
Although 8 is shown as having the lower portion buried underground, the entire box 18 may be buried underground.
In recent years, high-floor dwellings having a warm space under the floor have been constructed.
8 may be placed on the ground surface under the floor or on the ground without burying all or a part of 8. In such a case, it is not always necessary to arrange the heat insulating material 20 in the box 19. The shape of the box 18 is not limited to the box shape, and may be any shape. Alternatively, a box from which the bottom wall has been removed may be used.

[0028]

According to the present invention, the water draining device may be installed at only one place, and there is no need to install a header behind the ceiling, so that the space can be effectively used. Further, since the length of the installation pipe is shortened, the cost is reduced and the drainage operation is simple. Also, the work of construction and maintenance management is easy. Furthermore, since the temperature drop in the box can be delayed, it is possible to delay the time during which the cold water or hot water in the instruments and pipes contained in the box is frozen.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a cold district water supply system according to a preferred embodiment of the present invention.

FIG. 2 is a plan sectional view of a box of the equipment of FIG. 1;

FIG. 3 is a sectional view taken along lines 3-3 in FIG. 1;

FIG. 4 is a sectional view taken along lines 4-4 in FIG. 1;

FIG. 5 is a sectional view showing a water drain valve for cold water.

FIG. 6 is a sectional view showing a hot water drain valve.

FIG. 7 is a schematic view showing an example of a conventional cold district water supply system.

FIG. 8 is a schematic view showing another example of a conventional cold district water supply system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Water supply equipment for cold regions 12 Primary piping 14 Cold water drain valve 16 Cold water header 18 Box 22 Water heater 24 Washstand 26 Sink 28 Bath 30 Toilet 32 Hot water drain valve 34 Header for hot water

Claims (3)

(57) [Claims] 1. A primary pipe connected to a water main, a chilled water draining device connected to the primary piping, a chilled water header connected to the chilled water draining device, and a chilled water secondary piping. A cold district comprising: a water heater connected to a header for cold water; a secondary pipe for hot water from the water heater to the hot water drainage device; and a hot water connection pipe for connecting the hot water drainage device to the hot water header. Water supply equipment, equipped with a box, a part of the primary pipe, a drain for cold water, a header for cold water, a part of the secondary pipe for hot water, a drain for hot water, a connecting pipe for hot water, and a header for hot water Is provided in the box. 2. The water supply system according to claim 1, wherein at least one elbow portion is provided in the hot water secondary pipe housed in the box. 3. The water supply facility according to claim 1, wherein a heating element comprising a tape heater or a panel heater is arranged in the box.