JPS59182328A - Method and device for testing water leakage in hot water pipeline of building - Google Patents

Abstract

PURPOSE:To find even a potential fault position of the hot water piping of a building by placing the water in the piping in a temperature fluctuation and a fluid state for the simulation of actual use prior to the interior finishing construction of the building. CONSTITUTION:The outlet pipe 5 and intake pipe 6 of an electric calorifier 2 are connected to both ends of the hot water piping 4 prior to the interior finishing construction of a specific section of the building after piping construction. A pump 8 for hot water circulation is interposed in the outlet pipe 5 and a cold/ hot selector valve V1 consisting of a cross valve driven by a motor M is provided to the connection part between a feed water pipe 9 and the outlet pipe 5. This device is used to flow city of normal temperature and hot water to the hot water piping 4 alternately at a specific period; and oscillations by the flow in the hot water piping 4 are caused and heat shrinkage due to fluctuations of the temperature of the hot water piping 4 is repeated, so the fatigue at a potential fault part of the joint part is accelerated to cause a water leak. Thus, the fault point is found before the interior finishing construction of the building.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 1tt6 water testing method for hot water system piping such as open spaces in buildings, 1-use cold and hot water pipes, and hot water pipes, and equipment used in the method.

Conventionally, leakage tests for hot water system piping in buildings have been carried out by applying hydrostatic pressure to the hot water system pipes in a designated area each time piping work is completed in that area, and, as a general rule, leaving the pipes alone for a period of time or more until the water pressure in the pipes drops. This is done using a so-called water pressure test method to check whether the

However, even if this test method is judged to be acceptable, it is necessary to complete the interior finishing work, connect the hot water system piping to the boiler, etc., and then test run the boiler, etc. immediately before the completion of construction. At the end of the year or after completion, / year-end name (between pipes, joints between pipes and joints between pipes and other equipment) H
ls, water leakage accidents, especially at joints between devices, etc.
There were times when a small amount of water called water leakage occurred. If such a water leakage accident occurs, the joint h=B must be retightened, but at the time of trial operation of the boiler, etc., the interior finish has already been completed, so the leakage pipe should be tightened. Not only is it troublesome to discover and retighten joints, but interior finishes such as wallpaper and carpets are damaged due to water leakage;! 14 L, it is often necessary to replace the interior finishing material.

The occurrence of such accidents along hot water system piping is thought to be largely due to the following reasons.

In other words, since the temperature of the water inside the pipe during the water pressure test is constant (same as the outside temperature), fatigue does not occur even at 1415 (joint), which has the potential for water leakage, and therefore does not reach &4 water. On the other hand, during test runs and actual use of the boiler, hot or cold water flows through the piping, causing heat convergence, which causes fatigue at the joint, and the accumulation of fatigue. As a result, water leakage will occur.

However, in the conventional water pressure testing method, the water inside the pipe is stationary, but during test runs of boilers, etc., and during actual use, the water inside the pipe flows, which causes vibrations in the joint, which can cause fatigue. This will be a contributing factor.

Therefore, the present invention has been developed to further develop the hydraulic test vessel.
Based on the interior finishing work of a building, the temperature changes and fat working conditions of the water inside the pipes are simulated to simulate actual use, making it possible to detect potential defective pipes.

Therefore, the present invention provides a R1i water hunting method for hot water system piping in buildings that can detect such potentially defective pipes, and a device that can be used in actual practice of the method. be. That is, in the method of the present invention, prior to the interior finishing work 11 of a building, cold water and hot water are alternately flowed into the hot water system piping at 141' and 21' In addition, the system b' of the present invention includes a water heater and a hot water circulation pump connected to both ends of the hot water system piping, a water supply pipe connected to the outlet pipe of the water heater, and a water supply pipe branched from the inlet pipe of the water heater. a drain pipe, and the water supply pipe and the outlet pipe are provided with cold/hot switching valves for switching between a first state in which room-temperature city water supplied by the water supply pipe flows and a second state in which hot water flows; The water pipe is equipped with a drain valve, and the latter is opened when the bender is in the second position, and the latter is opened when the former is in the second major prayer. In order to become UjJ (there is a ', 'i sign in this interlocking point.

Hereinafter, a one-fire embodiment of the present invention will be described with reference to FIG. 1I11.

The drawing shows an example of the water leakage test device i9 according to the present invention,
This device has a handheld Taito 1 and is constructed to be portable. 2 is an electric water heater equipped with an AC, 2oov heater 3. The electric water heater 2 is installed at both ends of the hot water system 1 piping 4 via an outlet 10 pipe 5 and an inlet pipe 6. It will be connected. 7a
, 7b is a connection part (manual DiJ closing valve provided here). A water supply pipe 9 is connected to the outlet pipe 5. Water supply pipe 9
A three-way cold/hot switching valve V1 driven by a motor M is provided at the connection point I5 of the outlet pipe 5. (
This is city water at room temperature. ), and the second state, which uses ri+iY water heated in water heater 2, and (
It is configured to be switchable. From the inlet pipe 6,
When the water pipe 1o branches off, a drain valve V2 such as a solenoid valve is interposed in the middle of the drain pipe 10. Cold 1 hour trump card! ri1] V1 and the salaried roaring drain 91 (V2, through the control 4jil==C1 that set the timer, iiJ person V1
When it is in the second position, gravel lane V2 is not open, IJi
J6 Vl is the second roar! In the translation, the latter V2 is linked so that it becomes "shi". These switching operations of Vl and V2 are performed periodically every +171 times when the temperature of the hot water system arrangement 4 rises to the temperature of hot water and when it returns to the d haze level of normal temperature city water, and this cycle is controlled by the controller. Set by the timer in C1. Therefore, it is desirable to allow the setting time by the timer to be adjusted ia'6 according to the amount of water held in the hot water system piping 4 and the outside temperature in order to shorten the cycle as much as possible.

Further, a pressure sensor p is provided on the downstream side of the pump 8 of the outlet pipe 5.
s, emergency cutoff valve UV, emergency valve 1 branched from its upstream side
．． An emergency drainage system is provided which includes a water pipe 11, an electromagnetic on-off valve S1 interposed therein, a controller C2 for these, and the like. That is, during a water test, when a large leak of water from a joint product occurs, the pressure sensor ps detects the low Ti leakage in the pipe, and the pressure sensor ps detects this. Based on the command issued from the initial control device C2, the emergency shutoff valve UV operates and at the same time the electromagnetic shut-off valve S cleans the water and drains water from the emergency drain pipe 11. In order to prevent 44 accidents caused by water runoff from the place, it is inevitable.

In the figure, pl and p2 are pressure gauges, TI and T2 are thermometers, and C3
is a controller that turns off the switch MSiON-OFF of the heater 3 based on the temperature drop measured by the water heater T3;
The structure is such that the temperature of the heated water is kept constant.

Following the water pressure test of the hot water system piping 4, the hot water system! I! il:! By alternately flowing normal temperature city water and hot water through the pipe 4 during the constant IN period, vibrations due to the flow 14 are generated in the hot water system piping 4, and heat loss due to temperature changes in the hot water system pipe 4 is caused. As the white is fed back, the fatigue of the potentially bad joint Has is accelerated, resulting in bending water.

Therefore, before starting the interior finishing work of the building, discover the defective tubes. Countermeasures such as retightening can be taken, and by the time construction is completed, curved water piping will be available with no risk of water leakage.

Moreover, since city water at room temperature is used as cold water, there is no need for a refrigeration system, and the weight of the curved water test equipment RF is reduced by 2HIJ.
It is possible to lower the price.

That is, the hot water supplied by the hot water supply pipe is 6.11L degrees high, and the humidity of city water is about 206C even in summer.

Therefore, even if city water at room temperature (approximately 20°C in summer) is used as the cold water for the city water test, the temperature of the hot water heated by the water heater 2 will be 2°C. (With this setting, even in summer, it is possible to apply a temperature change of more than 5 g to the hot water system piping 4 that occurs when using the whitewash remover, and check for water leakage due to thermal contraction. Therefore, we were able to create a compact light vehicle that could not handle the above-mentioned curves and cold floor equipment, and that was also easy to use.

Incidentally, the hot water LlliW pump 8 may be connected to the inlet pipe 6tl. In addition, the cold/hot cutoff valve V1 is composed of a three-way valve that connects the water supply pipe 9 and the outlet pipe 5 as shown in the figure, and also includes a three-way valve that connects the water supply pipe 9 and the outlet pipe 5. A1. 1) F (electromagnetic type or motor driven may be used) is provided between each part on the upstream side of the 'ε part, and the double-opening 13J valves are linked so that when one opens, the other opens. ((It is also possible to form Q.

As explained above, according to the present invention, before the building interior finisher 4j, the hot water system is subjected to two grade changes and vibrations caused by the flow, i: 'Ii' existing defects n' 4 tyi
11 defective parts can be easily and jj
ii: Found it, took action, and completed the project [11]
During the trial run and after the completion of the construction, the interior decoration of the thorn shrine was pasted due to the pregnancy and water damage (r)! It has the effect of obtaining coolness, ′(shi, etc.).

[Brief explanation of drawings]

Section 1-1 shows one implementation session 1 of the present invention, and FIG.
FIG. 2 is a diagram of the piping configuration of the long section of FIG. 1. 2...Electrical section, water equipment, 4...Water system piping,
5...To the outlet, 6...Inlet pipe, 8...Hot water ring 1t pump, 9...Water supply pipe, 1o...Drain pipe, Vl...Cold/hot switching valve, V2... ...Water extraction valve.

Claims (1)

[Claims] ■ A method for testing water leakage in a building, which includes testing for water leakage by alternately flowing cold water and hot water through hot water system piping at a predetermined period, prior to interior finishing work of the building. (2) The method according to claim 0, characterized in that city water at room temperature is used as the cold water. ■ It has a water heater and a hot water sea 1 fan pump connected to both ends of the hot water system piping, a water supply pipe connected to the outlet pipe of the water heater, and a drain pipe branched from the inlet pipe of the water heater, and The water supply pipe and the outlet pipe are equipped with cold/hot switching valves that switch between the first state in which room-temperature city water supplied by the water supply pipe flows and the second state in which hot water is flowed, and a drain valve is provided in the OiJ drain pipe. ,
The cold/hot switching valve and the drain valve are interlocked so that when the former is in the second position, the latter is open, and when the former is in the second position, the latter is closed. Water wiping equipment for hot water system piping in buildings. (2) The apparatus according to claim 0, wherein the water heater is an electric water heater. (2) The device according to claim 0 or 0, wherein the cold/hot switching valve is a three-way valve.