JP2002296140A - Pressurizing device for testing inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressurizing device for testing the inside of a pipe, which can simultaneously carry out the pressure test and the leakage test for a plurality of piping systems, on which different amounts of test pressure are applied, by using the single device. SOLUTION: The secondary side of the hydraulic pressurizing device 2 is divided into a plurality of branch tubes 3a, 3b, 3c and 3d, and reducing valves 4a, 4b and 4c corresponding to the plurality of piping systems 1a, 1b, 1c and 1d, on which the different amounts of test pressure are applied, are disposed at these branch tubes. Pressurized fluid ejected from the hydraulic pressurizing device is regulated using the reducing valves and simultaneously supplied to the plurality of piping systems 1a, 1b, 1c and 1d. Thereby, the pressure test and the leakage test for the plurality of piping systems, on which the different amounts of test pressure are applied, can be simultaneously carried out. It is preferable to employ a water pressurizing device 2A and a pneumatic pressurizing device 2B. A pretest is carried out using pressurized air, the pressure of which is lower than the above test pressure, and the presence or absence of leakage of air is checked. In the case the leakage of air does not exist, the pressure test and the leakage test are carried out using pressurized water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe internal pressure test apparatus for performing a pressure resistance / leak test on a plurality of piping systems.

[0002]

2. Description of the Related Art In a building facility, a large number of piping systems such as a water supply pipe, a hot water supply pipe, an air conditioning (cooled / hot water / cooled water) pipe, and a fire extinguishing pipe are provided at the same location. For the piping system,
Leak tests are performed, and if any problems are found, rework is performed to prevent a serious water leak accident after completion.

[0003] In these piping systems, the test pressure for the pressure resistance / leakage test is, for example, 980 kPa for the water supply pipe and 1176 for the hot water supply pipe, depending on the use and the piping structure.
kPa, 735 kP for air-conditioning (cold / hot water / cooling water) piping
a, Fire extinguishing pipes usually differ from each other, such as 1715 kPa.

Conventionally, when a pressure resistance / leakage test is performed by internal pressurization on a plurality of piping systems having different test pressures, as the piping work progresses, a predetermined area is
Multiple piping systems were tested separately. For this reason, in a building facility where a large number of piping systems such as a water supply pipe, a hot water supply pipe, an air conditioning pipe, and a fire extinguishing pipe exist in the same area, a large amount of time is required for a pressure resistance / leak test by internal pressurization. If there is not enough time for construction, multiple piping systems with different test pressures may be tested simultaneously using multiple pressurizing devices with different discharge pressures. A pressurized device was required.

Also, pressurized water is supplied to the piping system to
When performing a leak test, if there is a defect such as a poor connection in a part of a piping system, pressurized water supplied for the test leaks out, and secondary damage may occur. If pressurized air is used instead of pressurized water, secondary damage due to water leakage can be prevented.However, even with pressurized air, if a pipe is damaged by a pressure test, broken pieces will scatter around, Secondary damage may occur, and in this respect there is not much difference from using pressurized water.

[0006] The area where the pressure and leak test of the piping system is performed is
The pressurized water used for the test must be withdrawn from the tested piping system each time as it moves as the piping work progresses. It took time.

In water supply pipes, hot water supply pipes, etc., the inside of the pipes is cleaned by passing city water when the pipes are completed. However, since only water is used for cleaning, the efficiency of cleaning is poor and the amount of city water disposable is large. This is uneconomical, and there is also a problem in that when the pipe is completed, the length of the pipe is longer than that at the time of the test performed for each section during the pipe construction, so that foreign matter in the pipe is difficult to be removed.

[0008]

The present invention has been made in consideration of the above-mentioned problems in the prior art,
It is a main object of the present invention to provide a pipe internal pressure test apparatus in which a single apparatus can simultaneously perform a pressure resistance / leakage test of a plurality of pipe systems having different test pressures. The second object of the present invention is to prevent secondary damage caused by pressurized water or the like by performing a preliminary test using non-hazardous low pressure air before the test using pressurized water in addition to the main object. An object of the present invention is to provide an apparatus for testing the pressure inside a pipe. A third object of the present invention is to provide a pipe internal pressure test apparatus that can efficiently clean the inside of a pipe by utilizing a configuration for achieving the second object.

[0009]

The technical measures taken by the present invention to solve the above-mentioned problems are as follows. That is, the pipe internal pressurization test apparatus according to the first aspect of the present invention branches the secondary side of the fluid pressurizing apparatus into a plurality of branch pipes, and these branch pipes have a plurality of pipe systems having different test pressures. A pressure reducing valve corresponding to the above-mentioned is provided, and an automatic two-way valve and a pressure detector for detecting an internal pressure of a piping system connected to the automatic two-way valve are provided at the ends of the branch pipes, respectively. By adjusting the pressure fluid discharged from the pressure device to a predetermined test pressure by the pressure reducing valve and supplying the same to the plurality of piping systems at the same time, the pressure resistance / leakage test of a plurality of piping systems having different test pressures can be simultaneously performed. It is characterized by doing so. The pressurized fluid may be either pressurized water or pressurized air.

[0010] According to a second aspect of the present invention, there is provided a pipe internal pressurizing test apparatus in which a secondary side of a water pressurizing apparatus is branched into a plurality of pressure water branch pipes. While providing pressure reducing valves corresponding to a plurality of piping systems having different pressures, the secondary side of the air pressurization device is branched into a plurality of pressure air branch pipes, and these pressure air branch pipes and the pressure water branch pipes are branched. The end of the pipe is connected via an automatic three-way valve, and a pressure detector for detecting the internal pressure of the piping system connected to these automatic three-way valves is provided, which is lower than the test pressure discharged from the air pressurizing device. After supplying low-pressure air to the plurality of piping systems and checking for the presence or absence of leakage, the pressure water discharged from the water pressurizing device is adjusted to a predetermined test pressure by the pressure-reducing valve, and the plurality of pressure water is adjusted. Different test pressure by supplying to piping system at the same time It is characterized in that so as to perform a pressure-leak testing of the number of piping system simultaneously.

According to a third aspect of the present invention, there is provided a pipe internal pressurization test apparatus in which a secondary side of a water pressurizing apparatus is branched into a plurality of branch pipes for pressurized water. While providing pressure reducing valves corresponding to a plurality of piping systems having different pressures, the secondary side of the air pressurization device is branched into a plurality of pressure air branch pipes, and these pressure air branch pipes and the pressure water branch pipes are branched. The end of the pipe is connected via an automatic three-way valve, and a pressure detector for detecting the internal pressure of the piping system connected to these automatic three-way valves is provided, which is lower than the test pressure discharged from the air pressurizing device. After supplying low-pressure air to the plurality of piping systems and checking for the presence or absence of leakage, the pressure water discharged from the water pressurizing device is adjusted to a predetermined test pressure by the pressure-reducing valve, and the plurality of pressure water is adjusted. Different test pressure by supplying to piping system at the same time Performs a pressure-leakage test number of the piping system at the same time, and thereafter, is characterized by being configured to perform drainage in the piping system while supplying pressure air to the piping system by the air pressurization device.

According to the structure of the invention described in claim 1,
The pressure fluid discharged from one fluid pressurizing device is adjusted to a predetermined test pressure by a pressure reducing valve, and is simultaneously supplied to a plurality of piping systems.
The leak test can be performed simultaneously by one device.

According to the configuration of the invention described in claim 2,
Since the pressure water discharged from one water pressurizing device is adjusted to a predetermined test pressure by the pressure reducing valve and supplied simultaneously to the plurality of piping systems, the pressure resistance / leakage test of the plurality of piping systems having different test pressures is performed. Not only can be performed simultaneously by one device, but also prior to the test with pressure water, pressurized air discharged from one air pressurizing device is supplied to the plurality of piping systems, and the presence or absence of leakage is checked in advance. If there is a leak, the repair is performed, and if there is no leak, the test with the pressurized water is continuously performed, so that the secondary damage due to the leak of the pressurized water can be prevented.

Moreover, since the pressure air is lower than the test pressure required for the plurality of piping systems, the piping may be unexpectedly damaged during a preliminary test prior to the test using the pressurized water. Therefore, there is no danger of broken pieces flying around. It is desirable that the supply of the pressurized air be performed simultaneously to a plurality of piping systems, but they may be separately supplied.

According to the structure of the invention described in claim 3,
In addition to the above-mentioned advantages of the configuration of the present invention, the following advantages are provided. That is, prior to the test with the pressurized water, a preliminary test with the low-pressure air is performed, and if there is no leak, the test with the pressurized water is continuously performed. Thereafter, the air used in the preliminary test is used. The pressurizing device drains the piping system while supplying pressurized air to the piping system, so the pressurized water used for the test can be quickly removed from the tested piping system, and furthermore, the drainage is performed in a gas-water mixed state. Therefore, the inside of the pipe can be efficiently cleaned by the bubbling effect, foreign matter in the pipe can be easily and reliably discharged, and washing with city water after completion of the pipe can be omitted, so that it is economical.

[0016]

FIG. 1 shows an example of a pipe internal pressure test apparatus according to the present invention. In FIG. 1, 1a, 1b,
Reference numerals 1c and 1d denote a plurality of piping systems having different test pressures which are subjected to the pressure resistance / leak test. In this example, the pipe system 1a is a water supply pipe, and the test pressure is, for example, 9
It is 80 kPa. The piping system 1b is a hot water supply piping, and the test pressure is, for example, 1176 kPa. The piping system 1c is an air-conditioning (cold / hot water / cooling water) pipe, and has a test pressure of, for example, 735 kPa. The piping system 1d is a fire extinguishing pipe, and the test pressure is, for example, 1715 kPa.

Reference numeral 2 denotes a fluid pressurizing device, the secondary side of which is branched into a plurality of branch pipes 3a, 3b, 3c, 3d. These branch pipes 3a, 3b, 3c, 3d are provided with pressure reducing valves 4a, 4b, 4c corresponding to a plurality of piping systems 1a, 1b, 1c, 1d having different test pressures, respectively. 980 kPa, 1176 kPa, 73
5 kPa, 1715 kPa). In this example, the discharge pressure of the fluid pressurizing device 2 is changed to the test pressure (for example, 1) of the piping system (fire extinguishing pipe) 1d having the highest test pressure among the piping systems 1a, 1b, 1c, 1d.
715 kPa), so a pressure reducing valve is not provided in the branch pipe 3d connected to the piping system (fire extinguishing pipe) 1d, but the discharge pressure of the fluid pressurizing device 2 is equal to the piping system (fire extinguishing pipe) 1d. If the test pressure is set higher than the test pressure, a pressure reducing valve is also interposed in the branch pipe 3d.

At the ends of the branch pipes 3a, 3b, 3c, 3d, automatic two-way valves 5a, 5b, 5c, 5d connected to the piping systems 1a, 1b, 1c are provided, respectively.
a, 5b, 5c, 5d, piping systems 1a, 1b,
Pressure detectors 6a, 6 for detecting internal pressures of 1c, 1d
b, 6c, and 6d. 7a, 7b, 7c, 7
d is an automatic two-way valve for opening and closing the ends of the piping systems 1a, 1b, 1c, 1d.

Then, the pressure fluid discharged from the fluid pressurizing device 2 is adjusted to a predetermined test pressure by the pressure reducing valves 4a, 4b, 4c and the plurality of piping systems 1a, 1b, 1 are adjusted.
By simultaneously supplying the pressures to c and 1d, a plurality of piping systems 1a, 1b, 1c and 1d having different test pressures can be simultaneously subjected to a pressure resistance / leak test. That is, the piping system 1
a, 1b, 1c, 1d Automatic two-way valves 7a, 7b, 7
c, 7d are closed, and the automatic two-way valves 5a, 5b, 5c, 5d at the tips of the piping systems 1a, 1b, 1c, 1d are opened,
The pressure fluid adjusted to the predetermined test pressure is supplied to the piping system 1a,
1b, 1c, 1d and supplied to the automatic two-way valves 5a, 5b, 5
c, 5d are closed for a predetermined time (for example, about 60 minutes), and the pressurized fluid is sealed, and the respective piping systems 1a, 1b, 1c,
It is configured to measure the presence or absence and degree of a drop in the internal pressure (test pressure) of 1d.

Reference numeral 8 denotes a start / stop of the fluid pressurizing device 2 and the automatic two-way valves 5a, 5b, 5c, 5d, 7a, 7b, 7c, 7
d, and controls the pressure detectors 6a, 6b,
6c, 6d, based on the detection signals.
The presence / absence of leakage and the degree of leakage are determined for each of b, 1c and 1d,
This is an arithmetic and control unit that outputs a signal to the display 9 that displays the determination result.

According to the above configuration, a plurality of piping systems 1a, 1b, 1c, 1d having different test pressures can be simultaneously subjected to a pressure resistance / leakage test by one device, so that the time required for the test can be greatly reduced. This is particularly effective in building equipment in which a large number of piping systems such as a water supply pipe, a hot water supply pipe, an air conditioning pipe, and a fire extinguishing pipe exist in the same area.

The pressurized fluid discharged from the fluid pressurizing device 2 may be either pressurized water or pressurized air. When the pressurized fluid is pressurized air (when the fluid pressurizing device 2 is an air pressurizing device), since the pressure fluctuation due to the ambient temperature is large, as shown by the phantom line in FIG. A temperature sensor 10 to be measured is provided, and the diameters and lengths of the piping systems 1a, 1b, 1c, 1d to be measured are input to the arithmetic and control unit 8, and the respective piping systems 1a, 1
b, 1c, and 1d are calculated, and based on these volumes and the ambient temperature signal input by the temperature sensor 10, the pressure fluctuation due to the ambient temperature is corrected. It is desirable to improve the test accuracy and shorten the test time.

FIG. 2 shows another example of the piping internal pressure test device when the pressure fluid discharged from the fluid pressure device 2 is pressurized water (the fluid pressure device 2 is a water pressure device). Is shown. In this example, a water tank 11 for supplying test water to a fluid pressurizing device 2 is provided, while the automatic two-way valves 7a and 7 are provided.
A return pipe 14 to the water tank 11 is connected to a drain pipe 12 having the secondary sides of b, 7c, and 7d joined through an automatic three-way valve 13 controlled to be opened and closed by an arithmetic and control unit 8. It is characterized in that a filter 15 and a return pump 16 are provided on the way. Other configurations are the same as those in FIG. 1, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

According to this configuration, the piping systems 1a, 1b,
The pressurized water used for the pressure and leak test of 1c, 1d can be removed by the filter 15 to remove foreign matter in the piping systems 1a, 1b, 1c, 1d mixed with the pressurized water and returned to the water tank 11. It can be used repeatedly as test water for pressure and leak test in the area. Therefore, it is suitable for use on construction sites where it is difficult to secure test water.

FIG. 3 shows another example of the pipe internal pressure test apparatus according to the present invention. In FIG. 3, 1a, 1b, 1c,
1d shows a plurality of piping systems having different test pressures to be subjected to a pressure resistance / leak test. In this example, as in the examples shown in FIGS. 1 and 2, the piping system 1a is a water supply pipe, and the test pressure is, for example, 980 kPa. The piping system 1b is a hot water supply piping, and the test pressure is 1176, for example.
kPa. The piping system 1c is an air-conditioning (cold / hot water / cooling water) pipe, and has a test pressure of, for example, 735 kPa. The piping system 1d is a fire extinguishing pipe, and the test pressure is, for example, 1715 kPa.

Reference numeral 2A denotes a water pressurizing device, the secondary side of which is provided with a plurality of pressure water branch pipes 30a, 30b, 30c, 30d.
It is forked. These branch pipes for pressure water 30a, 3
0b, 30c and 30d have pressure reducing valves 4a and 4a corresponding to a plurality of piping systems 1a, 1b, 1c and 1d having different test pressures.
4b, 4c and their test pressures (eg, 98
0 kPa, 1176 kPa, 735 kPa, 1715 k
Pa) is obtained. In this example, the discharge pressure of the water pressurizing device 2A is adjusted to the piping systems 1a, 1b,
Since the test pressure (for example, 1715 kPa) of the piping system (fire extinguishing pipe) 1d having the highest test pressure among 1c and 1d is adjusted, the pressure water branch pipe 30d connected to the piping system (fire extinguishing pipe) 1d is depressurized. Although a valve is not provided, when the discharge pressure of the water pressurizing device 2A is set higher than the test pressure of the piping system (fire extinguishing pipe) 1d, the pressure reducing valve is also provided in the pressure water branch pipe 30d. Will be interposed.

Reference numeral 2B denotes an air pressurizing device, the secondary side of which is provided with a plurality of pressure air branch pipes 300a, 300b, 300b.
c and 300d. The branch pipes for pressure air 300a, 300b, 300c, 300d and the ends of the branch pipes for pressure water 30a, 30b, 30c, 30d are connected via automatic three-way valves 50a, 50b, 50c, 50d. . 6a, 6b, 6c, 6d are pressure detectors for detecting the internal pressure of the piping systems 1a, 1b, 1c, 1d connected to the automatic three-way valves 50a, 50b, 50c, 50d, and 7a, 7b, 7c, 7d are Piping system 1a,
It is an automatic two-way valve that opens and closes the ends of 1b, 1c, and 1d.

Then, a pressure air (for example, 196 kPa) lower than the test pressure (minimum test pressure 735 kPa) discharged from the air pressurizing device 2B is simultaneously supplied to the plurality of piping systems 1a, 1b, 1c, 1d. After supplying and confirming the presence or absence of leakage, the pressure water discharged from the water pressurizing device 2A is adjusted to a predetermined test pressure by the pressure reducing valves 4a, 4b, 4c, and the plurality of piping systems 1a, 1b are adjusted. , 1c,
By simultaneously supplying to 1d, a plurality of piping systems 1a, 1b, 1c and 1d having different test pressures can be simultaneously subjected to a pressure resistance / leakage test. A plurality of piping systems 1a,
After the pressure resistance / leak test of 1b, 1c, 1d is completed, the piping system 1a, 1b, 1c,
1d, while simultaneously supplying pressurized air to 1d
It is configured to drain water in b, 1c, 1d.

Reference numeral 8 denotes starting and stopping of the water pressurizing device 2A and the air pressurizing device 2B and the automatic three-way valves 50a, 50b, 50c,
50d and the opening and closing of the automatic two-way valves 7a, 7b, 7c, 7d, and the pressure detectors 6a, 6b, 6c,
6d, the piping systems 1a, 1b, 1
This is an arithmetic and control unit that determines the presence or absence of leakage and the degree of leakage for each of c and 1d, and outputs a signal to a display 9 that displays the result of the determination. Reference numeral 11 denotes a water tank for supplying test water to the water pressurizing device 2A, and the automatic two-way valves 7a, 7b, 7c, 7
The arithmetic and control unit 8 is connected to the drain pipe 12 where the secondary side of
A return pipe 14 to the water tank 11 is connected via an automatic three-way valve 13 for drainage, which is controlled to open and close by a filter, and a filter 15 is provided in the middle of the return pipe 14. The manual operation of the arithmetic and control unit 8 switches the operation of the pipe internal pressurization test apparatus between the multi-system simultaneous test mode and the water saving mode.

Next, a test procedure using the above-described pipe internal pressure test apparatus will be described in detail. (1) Simultaneous multi-system test mode First, as a preliminary test, the piping systems 1a, 1b, 1
Close the automatic two-way valves 7a, 7b, 7c, 7d at the ends c, 1d, and connect the automatic three-way valves 50a, 50b, 50c, 50d to the branch pipes 300a, 300b, 300c, 300 for compressed air.
With the air pressure device 2B switched so as to open between d and the piping systems 1a, 1b, 1c, 1d, the test pressure is also reduced by the air pressurizing device 2B, that is, lower than the minimum test pressure by pressurized water. Low, danger-free pressure (eg 196k
Pa) (approximately Pa) to the piping systems 1a, 1b, 1c, 1
d, then the automatic three-way valves 50a, 50b, 50c,
50d is closed for a predetermined time (for example, about 60 minutes), pressurized air is sealed, and each piping system 1a, 1b, 1c, 1
The presence or absence of air leakage is determined based on whether or not the internal pressure (test pressure) d has dropped. The result is displayed on the display 9.

As shown by the imaginary line in FIG. 3, a temperature sensor 10 for measuring the ambient temperature of the measurement target area is provided, and the diameters and lengths of the piping systems 1a, 1b, 1c, 1d to be measured are determined as described above. The data is input to the arithmetic and control unit 8 and each piping system 1a,
By calculating the volumes of 1b, 1c, and 1d and correcting the pressure fluctuation due to the ambient temperature based on these volumes and the ambient temperature signal input from the temperature sensor 10, In the preliminary test using compressed air, the test accuracy can be improved and the test time can be shortened.

If there is a leak, the test is stopped and a defective connection is repaired. If there is no leak, continue the test with pressurized water. That is, the automatic two-way valves 7a, 7
b, 7c, 7d and the automatic three-way valve 13 for drainage are opened to release the above-mentioned pressurized air while the automatic three-way valves 50a, 50
0b, 50c, and 50d are connected to the branch pipes 30a, 30 for pressurized water.
b, 30c, 30d and piping systems 1a, 1b, 1c, 1d
Is switched to open, and the pressurized water discharged from the water pressurizing device 2A is filled in the piping systems 1a, 1b, 1c, 1d.

Thereafter, the piping systems 1a, 1b, 1c, 1
The d-terminal automatic two-way valves 7a, 7b, 7c, 7d are closed, and the water pressurizing device 2A is operated until it reaches a predetermined discharge pressure (in the illustrated example, the maximum test pressure, for example, 1715 kPa). Then, the pressure water is adjusted to a predetermined test pressure by the pressure reducing valves 4a, 4b, 4c and supplied to the piping systems 1a, 1b, 1c, 1d simultaneously.

Thereafter, the automatic three-way valves 50a, 50b, 5
0c and 50d are closed for a predetermined time (for example, about 60 minutes)
The pressurized water is sealed in the piping systems 1a, 1b, 1c and 1d, and the presence or absence and the degree of a drop in the internal pressure (test pressure) of each of the piping systems 1a, 1b, 1c and 1d is measured, and the test result is displayed. 9 will be displayed. If there is water leakage,
Since the information is displayed on the display unit 9, an emergency call is made to a worker waiting near the piping systems 1a, 1b, 1c, 1d by a wireless communication device such as a mobile phone, so that a repair is performed.

As described above, prior to the test with the pressurized water, the preliminary test by the supply of the pressurized air is performed to confirm the presence or absence of the leak. Secondary damage can be prevented.

In addition, since the pressure air used is lower than the test pressure required for the plurality of piping systems 1a, 1b, 1c, 1d, a preliminary test prior to the test using the pressurized water is used. In addition, there is no danger of accidental breakage of the pipe and scattering pieces scattered around.

If there is no leak, drain and clean. Specifically, the automatic two-way valves 7a, 7b, 7c, 7d and the automatic three-way valve 13 for drainage are opened, and the automatic three-way valves 50a, 50
b, 50c, 50d are connected to the branch pipes 300a, 3 for pressurized air.
00b, 300c, 300d and piping systems 1a, 1b, 1
In a state where switching is performed so as to open between c and 1d, pressurized air is supplied to the piping systems 1a and 1 by the air pressurizing device 2B.
b, 1c and 1d.

Therefore, the pressurized water used for the test can be quickly withdrawn from the tested piping systems 1a, 1b, 1c, 1d and drained out of the system. Moreover, since the water is discharged in a mixed state of air and water by the supply of pressurized air, the inside of the piping systems 1a, 1b, 1c and 1d is efficiently cleaned by the bubbling effect, and the test is performed for each limited area. Therefore, coupled with the fact that the pipe length is shorter than when the pipe was completed, foreign matter in the pipe can be easily and reliably discharged to the outside of the system, and washing with city water after the completion of the pipe can be omitted. It is.

(2) Water Conservation Mode A plurality of piping systems 1a, 1b, 1c, such as first performing a pressure resistance / leak test on the piping systems 1a, 1b, and then performing a pressure resistance / leak test on the piping systems 1c, 1d. , 1d are subjected to a pressure resistance / leakage test for each of several piping systems, and the pressurized water used for the pressure resistance / leakage test is collected in the water tank 11 by the air pressurizing device 2B in the drainage / washing process. Thus, it will be reused as pressurized water for the next pressure and leak test.

That is, after a low-pressure pressurized air is supplied to the piping systems 1a, 1b, 1c and 1d by the air pressurizing device 2B and a preliminary test for determining the presence or absence of air leakage is completed,
By the water pressurizing device 2A, for example, piping systems 1a, 1b
Supply pressurized water only, and perform pressure resistance / leakage test. If there is no leakage, the automatic two-way valves 7a and 7b are opened, the automatic three-way valve 13 for drainage is switched so that the drain pipe 12 and the return pipe 14 are opened, and the automatic three-way valves 50a and 50b are opened. ,
Branch pipes 300a and 300b for pressurized air and piping system 1a,
1b to open the air pressurizing device 2
B, the piping system 1a, 1b
The pressurized water inside is sent to the return pipe 14 in a gas-water mixed state,
The water is collected in the water tank 11 through the filter 15.

Next, for example, pressurized water is supplied only to the piping systems 1c and 1d to perform a pressure resistance / leakage test. If there is no leakage, the automatic two-way valves 7c and 7d are opened, the automatic three-way valve 13 for drainage is opened, and the automatic three-way valves 50c and 50d are opened while the space between the drain pipe 12 and the return pipe 14 is opened. Switching between the branch pipes 300c, 300d for pressurized air and the pipe systems 1c, 1d is made open, and the pressurized water in the pipe systems 1c, 1d is mixed with water by the pressurized air supplied from the air pressurizing device 2B. In this state, it is sent to the return pipe 14 and collected in the water tank 11 through the filter 15. Therefore, it is suitable for use on a construction site where water is saved and it is difficult to secure test water.

[0042]

According to the present invention, the pressure resistance and leak test of a plurality of piping systems having different test pressures can be simultaneously performed by one apparatus, so that the time required for the test can be shortened and the test using pressurized water can be performed. By performing a preliminary test using low-pressure air without danger beforehand, it is possible to prevent the occurrence of secondary damage due to pressurized water and the like, and to effectively clean the inside of the piping.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating an example of a pipe internal pressure test apparatus.

FIG. 2 is a configuration diagram illustrating another example of a pipe internal pressure test apparatus.

FIG. 3 is a configuration diagram illustrating another example of a pipe internal pressure test apparatus.

[Explanation of symbols]

1a, 1b, 1c, 1d: piping system, 2: fluid pressurizing device, 2A: water pressurizing device, 2B: air pressurizing device, 3a, 3
b, 3c, 3d: branch pipe, 4a, 4b, 4c: pressure reducing valve,
5a, 5b, 5c, 5d ... automatic two-way valve, 6a, 6b, 6
c, 6d: pressure detector, 7a, 7b, 7c, 7d: automatic two-way valve, 30a, 30b, 30c, 30d: branch pipe for pressure water, 50a, 50b, 50c, 50d: automatic three-way valve
300a, 300b, 300c, 300d: Branch pipes for pressurized air.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Minoru Ishibashi 1-18-18 Nishiki, Naka-ku, Nagoya City Inside Nagoya Branch, Takenaka Corporation (72) Inventor Tetsuji Eiji 1-18-22 Nishiki, Naka-ku, Nagoya City No. Takeda Corporation Nagoya Branch F-term (reference) 2D060 AA10 2G061 AA05 BA15 EA05 2G067 AA13 BB04 CC02 CC04 DD02 EE08

Claims (3)

[Claims] 1. A secondary side of a fluid pressurizing device is branched into a plurality of branch pipes, and these branch pipes are provided with pressure reducing valves corresponding to a plurality of piping systems having different test pressures. Are each provided with an automatic two-way valve and a pressure detector for detecting an internal pressure of a piping system connected to the automatic two-way valve, and the pressure fluid discharged from the fluid pressurizing device is supplied to the pressure reducing valve. By adjusting the pressure to a predetermined test pressure and supplying the same to the plurality of piping systems at the same time, a pressure test and a leak test of a plurality of piping systems having different test pressures can be simultaneously performed. apparatus. 2. The secondary side of a water pressurizing device is branched into a plurality of branch pipes for pressure water, and these branch pipes for pressure water are provided with pressure reducing valves corresponding to a plurality of piping systems having different test pressures. On the other hand, the secondary side of the air pressurizing device is branched into a plurality of pressure air branch pipes, and these pressure air branch pipes and the ends of the pressure water branch pipes are connected via an automatic three-way valve, A pressure detector for detecting the internal pressure of the piping system connected to these automatic three-way valves is provided, and pressure air lower than the test pressure discharged from the air pressurizing device is supplied to the plurality of piping systems. After confirming the presence or absence of a leak, the pressure water discharged from the water pressurizing device is adjusted to a predetermined test pressure by the pressure reducing valve and simultaneously supplied to the plurality of piping systems, so that a plurality of test pressures having different test pressures are different. Pressure test and leak test at the same time A pressurization test apparatus inside a pipe, characterized in that: 3. The secondary side of the water pressurizing device is branched into a plurality of branch pipes for pressure water, and these branch pipes for pressure water are provided with pressure reducing valves corresponding to a plurality of piping systems having different test pressures. On the other hand, the secondary side of the air pressurizing device is branched into a plurality of pressure air branch pipes, and these pressure air branch pipes and the ends of the pressure water branch pipes are connected via an automatic three-way valve, A pressure detector for detecting the internal pressure of the piping system connected to these automatic three-way valves is provided, and pressure air lower than the test pressure discharged from the air pressurizing device is supplied to the plurality of piping systems. After confirming the presence or absence of a leak, the pressure water discharged from the water pressurizing device is adjusted to a predetermined test pressure by the pressure reducing valve and simultaneously supplied to the plurality of piping systems, so that a plurality of test pressures having different test pressures are different. Pressure and leak tests of the piping system Thereafter, a drainage in the piping system is performed while supplying pressurized air to the piping system by the air pressurizing device.