JPH11160190A - Pressure proof test method of piping and pressure proof testing device of piping using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the pressure proof test of the static pressure and the pulsation pressure during the piping construction by developing the pulsation pressure with the specific pressure by a given number of times after the static pressure test inside of the piping, then performing the static pressure test again, and comparing the pressure inside of the piping between the static pressure test and that after the pulsation pressure developing test. SOLUTION: The water in a water tank 12 sucked by a pump 11 is force-fed to a hot water supply and water supply pipings 3b, 3c through a coupler 13, a pressure adjustment valve 19 is operated to keep the inside of piping with the pressure suitable for the static pressure test, and a ball valve 15 is closed. Then the pressed piping is left as it is for a given time, and the lowering of the pressure inside of the piping is measured by a pressure gage 17 to detect the leakage in the pippins 3b, 3c (static pressure test). Then an electromagnetic valve 31 is opened and closed by a specific number of times while adding the pressure inside of the piping by a pump 11 to perform the pulsation pressure test inside the piping. Then the static pressure test is performed again. The pressure value of the pressure gage 17 of the first static pressure test and that after the pulsation pressure test are compared to obtain the result of water proof test close to the actual use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a leak in a pipe used for detecting a leak in a pipe whose internal pressure fluctuates due to use, such as a constructed water pipe, and an apparatus for detecting a leak in a pipe using the method. About.

[0002]

2. Description of the Related Art Water pipes for individual houses, such as condominiums, are constructed by metal pipes requiring specialized skills. However, in this construction, the construction of the water supply pipe cannot be performed unless the worker has specialized skills.

[0003] Therefore, it has become possible to construct a water supply pipe by a plumbing method using a sheath tube, which is easy to construct.
This is done, for example, by laying a flexible synthetic resin sheath tube in advance in or on a concrete slab,
After the interior is completed, the required piping route is constructed by passing a water pipe, for example, a crosslinked polyethylene pipe through the interior.

[0004] By the way, water pipes are subjected to a water pressure test after construction in order to detect whether or not there is water leakage in each part of the pipes. In water pipes constructed using pods, using the fact that joints are located at points that can be easily confirmed from the outside, after piping construction, manual or electric pump,
A pressurized fluid, such as water, is supplied to the inside of the pipe from the test gauge section formed in advance on the pipe to pressurize the inside of the pipe, and from this state, the worker determines whether or not water leaks from the joint. I was checking.

[0005]

In the plumbing method using a sheath tube, a synthetic resin tube is connected to a metal base of a faucet device installed in a bathroom, a toilet, a toilet, or a kitchen. That is, since a connection of different kinds of members is used, the joint portion is easily affected by a shocking pressure.

However, when water is used in a bathroom, a washroom, a toilet, a kitchen, or the like, a water supply pipe pulsates the pressure in the pipe and generates a pulsating pressure. For this reason, although there is no water leakage in the pipe in the water pressure test at the time of pipe construction described above, after the pipe construction,
When the pipe was actually used, there was a problem that water leaks from the joint of the pipe due to pulsation of the pressure in the pipe.

[0007] Therefore, in a pipe in which the internal pressure fluctuates due to such use, a technique for performing a water pressure test suitable for actual pipe use is not sufficient, as a pressure test with static (water) pressure is not sufficient.

The present invention has been made in view of the above circumstances. It is an object of the present invention to provide a method for testing a pressure resistance of a pipe capable of performing two types of pressure resistance tests, that is, a static pressure and a pulsating pressure, at the time of piping construction. An object of the present invention is to provide a piping pressure test apparatus using the method.

[0009]

According to a first aspect of the present invention, there is provided a method for testing pressure resistance of a pipe, wherein a pressure fluid is supplied into the pipe through an injection portion connected to the pipe, and a predetermined pressure is applied to the inside of the pipe. After pressurizing the pipe, a static pressure test to detect the pressure change inside the pipe is performed while this state is left, and after the static pressure test is completed, the inside of the pipe is supplied to the predetermined pressure by supplying the pressurized fluid through the injection section. Pulsating pressure is generated inside the pipe by changing the internal pressure of the pipe a predetermined number of times while applying pressure, and after the generation of this pulsating pressure, the static pressure test is performed again. The purpose of the present invention is to detect the presence / absence of a leak in a pipe assuming actual use of the pipe by comparing the change with the pressure inside the pipe after the pressure generation test.

According to this pressure resistance test method, at the time of piping construction, it is confirmed that the piping has leaked by a static pressure pressure resistance test, and the pulsation of the pressure in the piping due to the use of the piping after the construction is performed. Piping leaks can be confirmed by testing.

According to another aspect of the present invention, the above object is achieved.
The pressure test device for piping of
A reservoir for storing the fluid, a pump for pumping the fluid in the reservoir through the injection section into the pipe, and a first closing the injection section.
It has an on-off valve and a pressure detector that detects the pressure inside the pipe, and detects a pressure change inside the pipe when the pipe is left pressurized to a predetermined pressure by supplying a pressurized fluid. And a second on-off valve for releasing the pressure in the pipe to the outside through the injection section, and opening and closing the second on-off valve a predetermined number of times while pressurizing the pipe at a predetermined pressure with a pump. A pulsating pressure generator that generates a pulsating pressure inside the pipe, and after the generation of the pulsating pressure is completed, the static pressure test section detects the pressure change inside the pipe again, and this detection result and the previous By adopting a structure that detects the presence or absence of leaks in pipes assuming actual pipe use by comparing with the results of detection of pressure changes in Check for leaks in piping and use piping after installation. Assuming a pressure pulsation is to have as actually performed and the confirmation of the piping leakage due pressure test in nearby pulsating pressure.

[0012] The pipe pressure resistance test apparatus according to claim 3 is
In addition to the above objects, the second on-off valve is opened and closed in order to generate a pulsation in the pipe in accordance with the individual pipe usage so that a pressure test with various actual pulsation pressures can be performed. Is constituted by a solenoid valve which can be set.

According to a fourth aspect of the present invention, there is provided a piping pressure test apparatus.
In addition to the above objectives, a pressure test can be performed easily.
A changeover switch for switching between the operation of the static pressure test unit and the operation of the pulsating pressure generator, a count setting unit for setting the number of times the solenoid valve is opened and closed, an open / close timer setting unit for setting the open time and the closed time of the solenoid valve, A control structure that has a control unit that controls the pump and solenoid valve according to the settings of the changeover switch unit, the number setting unit, and the open / close timer setting unit has been adopted, so that anyone can easily operate the pressure resistance test device. It is in.

According to a fifth aspect of the present invention, there is provided a piping pressure test apparatus.
In addition to the above objects, a water tank is used for the storage unit, a pump with a pressure regulating valve is used for the pump, and a pressure gauge is used for the pressure detection unit so that the pressure test device can be manufactured with a simple structure. A manual on-off valve is adopted as the on-off valve, and a pump, a manual on-off valve, a pressure gauge, and an injection section are connected to the outflow port of the water tank in order to form a static pressure test section. The pulsation pressure generating unit is configured by interposing an electromagnetic valve so as to bypass the space.

[0015] A piping pressure test apparatus according to claim 6 is
In addition to the above objects, the static pressure testing unit and the pulsating pressure generating unit are connected to a changeover switch unit, a frequency setting unit, an opening / closing timer setting unit, and so on so that the pressure test device can be easily moved / installed at the place where the pipe is constructed. That is, the entire apparatus is assembled into a single movable unit by assembling the carriage with a control unit.

[0016] The apparatus for testing the pressure resistance of piping according to claim 7 is as follows.
In addition to the above objects, in order to handle the withstand voltage test device, a changeover switch unit, number setting unit, open / close timer setting unit,
The control unit is assembled to a control panel to form a control system into one unit.

[0017] The pipe pressure resistance test apparatus according to claim 8 is
In addition to the above objects, in order to reduce noise during driving, the bogie is composed of a base with casters on the lower part and a sound insulation case assembled to cover the base on the upper part of the base. In addition, the pump and the solenoid valve are housed, and another device is assembled outside the sound insulation case, so that the sound generated by the operation of the pump and the solenoid valve is isolated.

According to a ninth aspect of the present invention, there is provided a piping pressure test apparatus.
In addition to the above object, in order to reduce vibration during operation of the apparatus, a pump and a solenoid valve are mounted on a base via a vibration isolating member, thereby damping vibration generated by the operation of the pump and the solenoid valve. .

According to the tenth aspect of the present invention, in addition to the above objects, the pipe pressure resistance test apparatus further includes an opening formed on the side wall of the sound insulation case with a lid so that inspection / maintenance / adjustment of the apparatus can be easily performed. Forming a part, through the opening, the pump,
Inspection / maintenance / adjustment of solenoid valves, etc. can be performed.

[0020] In addition to the above object, the piping pressure test apparatus according to the eleventh aspect further includes a control panel and a water tank provided on one side of the upper part of the sound insulation case so as to improve the pump characteristics and to provide an easy-to-operate appearance. Attach the piping that combines the assembling, injection section, manual on-off valve and pressure gauge to the other side of the upper part of the sound insulation case,
The configuration is such that the pressure in the water tank is pushed into the pump while the pressure gauge and the control panel are laid out at positions that are easy to operate.

In the pipe pressure test apparatus according to the present invention, in addition to the above objects, a strainer is provided in a flow path from the outlet of the water tank to the pump so as to prevent failure and malfunction of the pump and pipes. Thus, foreign matter such as sand is prevented from entering into devices such as pumps and valves.

According to a thirteenth aspect of the present invention, in addition to the above object, in order to suppress the generation of vibrations due to pulsation, the piping on the upper part of the sound insulation case is installed via a vibration isolating member. That is, the space between the case and the piping is buffered.

In addition to the above object, the piping pressure test apparatus according to the present invention is capable of easily confirming the water level in the water tank and preventing the fluid from flowing out of the water tank when the apparatus is moved. In addition, the opening of the water tank is closed with a removable transparent lid.

According to a fifteenth aspect of the present invention, in addition to the above object, a piping handle is mounted on a base of a bogie so that the device can be easily moved, carried, and lifted.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on one embodiment shown in FIGS. In FIG. 1, reference numeral 1 denotes a water supply pipe constructed for each house, such as an apartment, using, for example, a sheath pipe method. In addition, in water supply pipe 1,
Only the piping route connected from the water heater 1a to the flushing equipment (not shown) such as a bathroom, a washroom, a toilet, a kitchen, etc. via the hot water supply header 2a and the water supply header 2b is shown. However, 3a indicates a sheath pipe, 3b indicates a hot water supply pipe, and 3c indicates a water supply pipe.

The hot water supply / water supply pipe section from the water heater 1a to each of the headers 2a, 2b has a test gauge section 4a, 4b.
(For example, a base portion) is formed, and by connecting a water pressure resistance test device 5 (corresponding to a pressure resistance test device) to these test gauge portions 4a or 4b, a water pressure resistance test (pressure resistance test) is performed for each water supply system / hot water supply system. ) Can be performed.

As shown in the schematic diagram of FIG. 1, the inside of the water supply pipe 3b or the water supply pipe 3c to be tested is pressurized to a predetermined pressure with a pressure fluid, for example, water. A hydrostatic pressure test section 10 (corresponding to a static pressure test section) for detecting a pressure change inside the pipe by leaving it for a certain time from
Combined with the pulsation pressure generating unit 30 that generates the same pulsation inside the pipe as when using the pipe, the result of the initial pressure change due to the hydrostatic pressure, and after the pulsation is generated, detected again by the hydrostatic pressure test unit 10 A structure that allows comparison with the result of the pressure change is adopted.

That is, the hydrostatic pressure test section 10
In step 1, for example, water (corresponding to a pressure fluid) stored in a water tank 12 (corresponding to a reservoir) is transferred from a coupler 13 (corresponding to an inlet) to a test gauge section 4a (or a test gauge section 4).
b) to pressurize the hot water supply pipe 3b or the water supply pipe 3c to a predetermined pressure.
And pressurized pipes 3b and 3c are connected to a manual ball valve 15
(A manual on-off valve, equivalent to a first on-off valve) and a leaving system 16 for closing and leaving, and a pressure detecting system 18 for detecting a pressure change inside the pipe by a pressure gauge 17 (corresponding to a pressure detecting unit) during leaving.
Are combined.

The pulsating pressure generating section 30 has a structure in which the pressure in the pipe is released to the water tank 12 through the coupler 13 by opening and closing a solenoid valve 31 (corresponding to a second on-off valve) a predetermined number of times.

The operation of the hydrostatic pressure / pulsating pressure is controlled by the control panel 40.
It is controlled by. Then, the hydrostatic pressure test unit 10, the pulsating pressure generation unit 30, and the control panel 40 are connected to the bogie 5
0, a water pressure test apparatus 5 having excellent practicality as shown in FIGS. 2 to 7 is realized. Note that FIG.
Is an external view of the water pressure resistance test device 5, FIG. 3 is an exploded view of the device 5,
4 to 7 show views of respective parts of the device 5 viewed from different directions.

As shown in FIG. 3, the bogie 50 has a rectangular plate shape having casters 51 mounted at four lower corners, for example, a peripheral wall formed at an outer peripheral end, as shown in FIG. It comprises a base 52 and a box-shaped sound insulation case 53 which is detachably fitted to the outer peripheral portion of the base 52 so as to cover the upper part. On both left and right sides of the base 52, a pair of carrying handles 54 formed by U-shaped arms extending upward along the side surfaces of the sound insulation case 53 are attached, and the entire movement / transportation of the water pressure test apparatus 5 is performed. / Lifting etc. can be performed.

In the sound insulation case 53, among the equipment of the water resistance test apparatus 5, equipment that emits noise, that is, the pump 11,
A piping section 31a including the solenoid valve 31 is housed. More specifically, the pump 11 constituting the pressurizing system 14 is disposed laterally at a point near the front of the case, and the piping portion 31a including the solenoid valve 31 is disposed parallel to the pump 11 (sideways) at a point near the rear of the case. is there.

The pump 11 includes, for example, the electric motor 1
A plunger pump having a slender outer shape is used, which is configured by combining a plunger type pump 11b with 1a. Note that a pressure regulating valve 19 that allows the discharge pressure to be arbitrarily adjusted by operating the handle 19a is connected to the discharge portion of the pump portion 11b.

The support leg 11c of the pump 11 (the electric motor 1
The pair of legs extending in the width direction from 1a) is mounted on a pump base 21 which is mounted on a pump 52 so as to float from an upper surface of a base 52 with a vibration isolating member, for example, a vibration isolating rubber 20.

The piping section 31a including the solenoid valve 31 has a short pipe 32 connected to the inflow side of the solenoid valve 31 and a T-shaped joint 33 and a drain valve 34 (water in the water tank 12 to the solenoid valve 31) at the outflow side.
(A valve to be discharged to the outside through the air) are connected in order. The drain valve 34 penetrates through the peripheral wall of the base 52 and faces the outside. The branch portion of the T-shaped joint 33 opens at the inner bottom of the water tank 12 via a return hose 37 penetrating the upper part of the sound insulation case 53. Connected to the return port 12b.

Then, both sides of the solenoid valve 31, that is, the short pipe 32 and the T-shaped joint 33 are connected via a mounting bracket 35 to an anti-vibration member, for example, an anti-vibration rubber 3 mounted on the upper surface of the base 52.
It is installed at 6.

An opening 53a that is opened and closed by a lid 56 is formed on one side surface of the sound insulation case 53, for example, on the rear side wall. The opening 53a is formed as a large rectangular opening that occupies most of the side wall. Through this opening 53a, maintenance / inspection of each device housed in the sound insulation case 53 and further to the pump unit 11 are performed. The structure is such that the mounted pressure regulating valve 19 can be adjusted.

Other components except the pump 11 and the solenoid valve 31 are mounted outside the sound insulation case 53. Specifically, on the upper surface of the sound insulation case 53, on the left side (one side) where the electric motor 11a of the pump 11 is arranged, the control panel 40 and the water tank 12 are installed in this order from the front. On the right side (the other side) where the pump unit 11b is disposed, the leaving system 1 is provided.
6 and pressure sensing system 18 are installed.

Outlet 12 formed in the inner bottom of water tank 12
A is connected to a strainer 22 that removes foreign substances such as sand contained in water in the water tank 12. The outlet of the strainer 22 is connected to the suction part of the pump part 11b through, for example, a flexible hose 23 penetrating the upper part of the sound insulation case 53, so that clean water is absorbed from the inside of the water tank 11. .

The leaving system 16 and the pressure detecting system 18
For example, in a direction parallel to the water tank 12, the ball valve 15, for example, a two-needle type pressure gauge 17, a long hose 13a, and a pipe in which a coupler 13 is sequentially connected are configured. The mounting seat 17 attached to the joint portion 17a supporting the pressure gauge 17
d is the same as when the electromagnetic valve 31 is supported.
It is installed above the sound insulation case 53 via b (vibration isolation member), and isolates the entire pipe from vibration.

The inlet of the ball valve 15 is connected to a discharge pipe 27 connected to a discharge section of the pump section 11b via a hose 26 passing through the upper part of the sound insulation case 53. With this connection, the pump 11, the ball valve 15, the pressure gauge 17, and the coupler 13 are sequentially arranged after the outlet 12 a of the water tank 12.

With this piping structure, a hydrostatic pressure test section 10 that detects the inside of the piping with the pressure gauge 17 and opens and closes the coupler 13 with the ball valve 15 is formed. That is, first, the water in the water tank 12 absorbed by the pump 11 is supplied from the coupler 13 to the hot water supply pipe 3 b or the water supply pipe 3 to be tested.
Then, the pressure inside the pipe is maintained at a pressure suitable for the hydrostatic pressure test by operating the pressure regulating valve 19, and then the inside of the pipe is maintained at the set pressure by closing the ball valve 15. The excess pressure returns from the overflow outlet of the pressure regulating valve 19 to the water tank 12 via an overflow hose 39 connected to a T-shaped joint 38 in the middle of the return hose 37. After the pressurized pipe is left for a certain period of time, the pressure drop inside the pipe is measured by the pressure gauge 17 to detect water leakage in the hot water supply pipe 3b or the water absorption pipe 3c (a water pressure test using hydrostatic pressure). ) Is performed. Reference numeral 17c denotes a pressure gauge valve.

A part of the discharge pipe 27 is connected to a short pipe 32 on the inflow side of the solenoid valve 31 by using, for example, a T-shaped joint 28 and a hose 29. That is, the solenoid valve 31 is interposed so as to bypass between the discharge side of the pump 11 and the water tank 12, and has a structure in which the internal pressure of the pipe to be tested can be released to the outside, that is, the water tank 12 through the coupler 13. .

Thus, when the solenoid valve 31 is opened and closed a predetermined number of times while the inside of the pipe to be tested is pressurized at a predetermined pressure by the pump 11, a pulsating pressure is generated inside the pipe. That is, the pulsation generator 30 is configured.

On the other hand, the control panel 40 includes, for example, a control section 41 (for example, composed of a microcomputer) built in a box-shaped casing 40a and a casing 40a.
And an operation panel 42 that outputs an operation signal to the control unit 41.

In accordance with the operation signal input from the operation panel 42, a test combining hydrostatic pressure / pulsation pressure can be performed. That is, the operation panel 4
2 includes a test start / stop button 43 for operating / stopping the pump 11, a select switch 44 (corresponding to a changeover switch section) for selecting a static pressure test mode and a pulsating pressure generation mode, and a faucet when using actual piping. Number setting section 45 for setting the number of times the solenoid valve 31 is opened / closed for setting the frequency of opening / closing
(Equivalent to a number setting section), a counter 46 for displaying the number of times set in the setting section 45, an opening / closing for setting the opening time and closing time of the solenoid valve 31 for setting the frequency of opening and closing the faucet when using actual piping. A timer setting unit 47 (corresponding to an open / close timer setting unit) is provided.

The control section 43 has a function of closing the solenoid valve 31 when the select switch 44 is operated in the hydrostatic pressure test mode, and turning on / off the pump 11 in accordance with an input from the test start / stop button 43. Is set.

Further, when the select switch 44 is operated in the pulsating pressure generation mode, the controller 43
Is turned on / off according to the input from the test start / stop button 43, the solenoid valve 31 is opened and closed according to the number of times set by the number setting unit 45, and the cycle of the open time and the closed time set by the open / close timer set unit 47. Function is set.

Thus, the hydrostatic pressure test can be performed by a combination of the operation of the test start / stop button 43 and the hydrostatic pressure test mode, and the test can be performed by a combination of the operation of the test start / stop button 43 and the pulsating pressure generation mode. By pulsating the internal pressure of the piping to be used, a pulsating pressure in a situation close to that when the actual piping is used (pulsating pressure in a cycle that is close to the actual cycle) is generated.

That is, first, a hydrostatic pressure test is performed, then a pulsating pressure is generated, and then a hydrostatic pressure test is performed again. At the time of the first hydrostatic pressure test, the pressure change indicated by the pressure gauge 17 is detected. That is, the pressure value indicated by the first stitch of the pressure gauge 33 and the pressure gauge 1 during the hydrostatic pressure test after the pulsation generation test
By comparing the detection result of the pressure change indicated by 7, that is, the pressure value indicated by the second needle of the pressure gauge 17, the result of the water pressure resistance test at a pulsating pressure close to the time of actual pipe use can be performed ( Water pressure test by pulsating pressure).

The opening formed in the upper portion of the water tank 12 is closed by a transparent lid plate (corresponding to a transparent lid) 25 which is detachably attached by, for example, a screw-type fixing tool 25a. Water is prevented from inadvertently flowing outside.

Next, the method of the present invention will be described with reference to the apparatus for testing the water pressure of a pipe constructed as described above. Now, it is assumed that a water pressure resistance test of the installed water supply pipe 3c is performed.

At this time, the water pressure resistance test apparatus 5 has the water tank 11 filled with water, a long hose 13 a having the coupler 13, a power cord 40 b extending from the control panel 40.
So that it does not hinder movement / transportation.

Then, in this state, the entire apparatus is moved by the casters 51 using the handle 53, and transported to the point where the test gauge portion 4b of the water supply pipe 3c is located. When the water pressure resistance test apparatus 5 has been carried to the target point, the power cord 40b of the apparatus is connected to a nearby outlet (city power supply), and the coupler 13 at the end of the hose is connected to the test gauge section 4b.

Thereafter, first, a hydrostatic pressure test is performed. At this time, the selector switch 44 is set to the hydrostatic pressure test side, and the test start / stop button 43 is operated to operate the pump 11.
Is operated (started).

Thus, the pump 11 absorbs the water stored in the water tank 12 and discharges the water from the discharge unit. Next, the ball valve 15 is opened.

Here, since the solenoid valve 31 is kept closed, the water discharged from the pump 11 passes through the discharge pipe 27, the hose 26, the ball valve 15, the pressure gauge 17, the hose 13a, the coupler 13 and is tested. It is pressure-fed from the gauge part 4b into the water supply pipe 3c.

Here, the faucet device connected to the water supply pipe 3c is closed after confirming that water has come out. Thereby, the inside of the water supply pipe 3c is pressurized by the filled water.

Then, the pressure gauge valve 17c is opened, and the pressurized state of the water supply pipe 3c is observed from the first pointer of the pressure gauge 17. Then, by operating the handle 19a of the pressure regulating valve 19,
The internal pressure of the water supply pipe 3c is maintained at a pressure suitable for the hydrostatic pressure test. At this time, the excessive pressure escapes to the outside by the discharge water returning from the overflow hose 39 of the pressure regulating valve 19 into the water tank 12.

Thereafter, the ball valve 15 is closed and the operation of the pump 11 is stopped (by operating the test start / stop button 43). Thereby, the inside of the water supply pipe 3c is kept at the set constant pressure.

Thereafter, this state is left, for example, for a predetermined time. Then, the pressure change inside the pipe after the standing is measured from the change of the first pointer of the pressure gauge 17.

From the degree of the pressure drop at this time, the presence or absence of leakage of the water supply pipe 3c (including the connection portion) at the hydrostatic pressure can be determined. As a result of the hydrostatic pressure test, if it is confirmed that there is no water leakage, the pulsating pressure equivalent to the actual use of the pipe is then applied to the water supply pipe 3c.
Work to generate.

At this time, the first needle of the pressure gauge 17, which is the detection result of the hydrostatic pressure test, is set. Then, the pump 11 is operated (started) without changing the pressure setting of the pressure regulating valve 19 and the position of the select switch 44.

Next, the ball valve 15 is opened. Then, the water discharged from the pump 11 is, as described above,
Water supply pipe 3c from coupler 13 through test gauge section 4b
It is pumped inside.

Here, since the pressure regulating valve 19 is set to the pressure set in the previous hydrostatic pressure test, the water supply pipe 3
The internal pressure of c is maintained at the same pressure as in the previous hydrostatic pressure test.

When it is confirmed from the second needle of the pressure gauge 17 that the same pressure as in the previous hydrostatic pressure test is maintained, the select switch 44 is switched to the pulsating pressure generation mode.

In response to this switching, the control section 41 operates the solenoid valve 31. At this time, the number of times corresponding to the number of times of opening and closing of the faucet in consideration of, for example, the frequency of water use of the constructed building is set in the number of times setting section 45, and the open / close timer setting section 47 is provided with, for example, the same time of opening and closing the faucet. Since the corresponding open time and close time are set, the control unit 41
Opens and closes the solenoid valve 31 a set number of times in a cycle of the set open / close time.

Then, inside the water supply pipe 3c, the pressure fluctuates due to the opening and closing operation of the solenoid valve 31. As a result, the water supply pipe 3c is in a state close to when water is actually used after the construction of the water supply pipe, and pulsation occurs inside the water supply pipe 3c, and the pulsation occurs when water is actually used. Pressure is generated.

That is, the situation where the pulsating pressure is applied to each part (including the connection part) of the water supply pipe 3c, that is, the situation of the pressure in the pipe when water is actually used is reproduced. When the opening / closing operation of the solenoid valve 31 for the set number of times is completed, the previous hydrostatic pressure test is performed again.

At this time, the select switch 44 is returned to the hydrostatic pressure mode. And the second pointer of the pressure gauge 17 is
When the pressure value set in the previous hydrostatic pressure test is stably pointed, the ball valve 15 is closed and the operation of the pump 11 is stopped (by operating the test start / stop button 43).

Thus, the inside of the water supply pipe 3c is pressurized at the same test pressure as in the previous hydrostatic pressure test. Thereafter, this state is left, for example, for the same time as the previous hydrostatic pressure test.

Then, the pressure change inside the pipe after this standing was measured from the second pointer of the pressure gauge 17, and this measurement result was compared with the measurement result of the first pointer of the pressure gauge 17 in the previous hydrostatic pressure test. I do.

That is, whether or not the water supply pipe 3c (including the connection portion) leaks due to the pulsating pressure is determined by whether or not the second pointer of the pressure gauge 17 is lower than the position of the first pointer of the pressure gauge 17. Recognize.

As a result, it is confirmed (detected) whether or not there is water leakage (leakage) in the water supply pipe 3c assuming actual use of the pipe. Then, as a result of the water pressure test with the pulsating pressure, if it is confirmed that there is no water leakage, the next pipe, namely, the hot water supply pipe 3
Move and carry the water pressure resistance test apparatus 5 to the point where the test gauge part 4a of (b) is located (by the casters 12 and the handle 54), and perform two kinds of water pressure resistance tests with hydrostatic pressure / pulsation pressure by the same operation. Just do it.

Therefore, at the time of pipe construction, the detection of pipe leakage at a hydrostatic pressure and the detection of pipe leakage at a pulsation pressure close to the actual one, assuming the pulsation of the pressure in the pipe due to the use of the pipe (after the construction of the pipe). Two types of withstand voltage tests can be performed.

As a result, the pressure resistance of the water pipe whose internal pressure fluctuates due to use, particularly the water pipe (including the connection portion) which is easily affected by the fluctuating pressure and which is constructed by the plumbing method using the sheath 3a, can be sufficiently improved. It can be confirmed, and highly reliable piping work without water leakage can be realized.

Further, two types of hydrostatic pressure tests using hydrostatic pressure / pulsating pressure can be performed by one hydrostatic pressure test apparatus 5. In addition, since the opening / closing time of the solenoid valve 31 can be set, pulsation can be generated in the piping in accordance with the usage state of each piping, and a water pressure test can be reproduced at various actual pulsation pressures. . In particular, since a control structure for controlling the pump 11 and the solenoid valve 31 according to the settings of the test start / stop button 43, the select switch 44, the count setting section 45, and the open / close timer setting section 47 is used, anybody can easily withstand. The operation of the hydraulic test apparatus 5 can be performed.

The hydrostatic pressure test section 10 includes a water tank 12, a pump 11 having a pressure regulating valve, a manual ball valve 15, and a pressure gauge 1.
7, the coupler 13 is connected, and the pulsating pressure generator 30 is connected to the pump 1
Since the solenoid valve 31 is interposed so as to bypass between the discharge side of 1 and the water tank 12, the water pressure resistance test apparatus 5 can be manufactured with a simple structure.

In addition, the hydrostatic pressure test apparatus 5 includes the hydrostatic pressure test section 10 and the pulsating pressure generating section 30 together with the control system equipment on the carriage 50, and the entire apparatus is integrated into one movable unit. Since it was configured, the water pressure resistance test device 5
Is easy to move / install at the place where the piping is installed. In particular, the handle 53 attached to the carriage 50 makes it easy to move, carry, and lift the entire device, so that handling is easier.

In addition, the control system employs a control panel 40, a test start / stop button 43, a select switch 4
4. Since the number-of-times setting unit 45, the open / close timer setting unit 47, and the control unit 41 are integrated into one unit, the water pressure test apparatus 5 is easy to operate and easy to handle.

When assembling each device, a base 52 with casters and a sound insulating case 53 covering the base 52 are provided.
The trolley 50 combined with the
The pump 11 and the solenoid valve 31 housed therein a device having a large noise, and the other devices were mounted outside the sound insulation case 53. Therefore, the sound generated by the operation of the pump 11 and the solenoid valve 31 was isolated, and the device was operated during operation. Noise can be reduced. In addition, since the pump 11 and the electromagnetic valve 31 are mounted on the base 52 with vibration damping by the vibration damping rubber 36, vibration during operation of the apparatus can be reduced. In addition, a cover 56 is provided on the side wall of the sound insulation case 53.
Since the attached opening 53a is formed, inspection / maintenance / adjustment can be easily performed even with equipment in the sound insulation case 53 such as the pump 11 and the electromagnetic valve 31.

Further, when assembling the equipment outside the sound insulation case 53, the water tank 12 and the control panel 40 are installed on one side (one side) of the upper surface of the sound insulation case 53, and the coupler 13, the ball valve 15 and the pressure on the other side (the other side). The water tank 1 that is frequently used is installed because the piping that combines the total 17 is installed.
2, coupler 13, ball valve 15, pressure gauge 17, control panel 4
0 can be laid out at an easy-to-operate position. In addition, the layout is such that the water in the water tank 11 is pushed into the suction port (not shown) of the pump 11 by gravity.
The characteristics of the pump 11 are also excellent (since the occurrence of airlock due to suction is avoided). Besides, coupler 1
3, the piping on the sound insulating case 53, which is a combination of the ball valve 15 and the pressure gauge 17, buffers the sound insulating case 53 with the sound insulating case 53. Less vibration at the time.

In addition, the pump 11
Since the strainer 22 is provided in the flow path toward
Intrusion of foreign matter such as sand into the pump 11 and the devices such as valves can be avoided, and failure / malfunction of the pump 11, valves and piping can be prevented, and stable operation of the hydrostatic pressure test device 5 can be expected. In particular, since the strainer 22 is disposed in the water tank 12, an effect of preventing the apparatus from becoming large is provided.

Since the opening of the water tank 12 is closed by the cover plate 25, the water stored in the water tank 12 is prevented from flowing out when the apparatus is moved / transported. Moreover, since the lid 25 is transparent, there is an advantage that the water level can be easily checked.

Although the method and apparatus of the present invention which provide these various effects have been described with reference to an example of a pressure test of a water supply pipe constructed by a plumbing method using a sheath pipe, the present invention is not limited to this. The present invention may also be applied to a pressure test of a water supply pipe constructed by a construction method and further to other pipes. It goes without saying that the pressure fluid is not limited to water but may be another pressure fluid.

[0086]

As described above, according to the first aspect of the present invention, at the time of piping construction, it is assumed that a pipe leak is detected by hydrostatic pressure and that a pulsation of the pressure in the piping due to the use of the piping (after the piping is constructed). Thus, two types of pressure resistance tests can be performed, that is, the detection of a pipe leak at a pulsating pressure close to the actual pressure.

As a result, it is possible to sufficiently confirm the pressure resistance of the pipe (including the connection portion) in which the internal pressure fluctuates by use.
Highly reliable piping work without fear of leakage can be realized.

According to the second aspect of the present invention, in addition to the above-described effects, an effect is obtained that two types of pressure resistance tests can be performed with a single water pressure resistance test apparatus under hydrostatic pressure / pulsation pressure. .

According to the third aspect of the present invention, in addition to the above-described effects, pulsation can be generated in the piping in accordance with the usage condition of each piping, and a pressure test is performed at various actual pulsation pressures. It has the effect of being able to do so.

According to the fourth aspect of the present invention, in addition to the above-described effects, anyone can perform operation switching, setting of the number of times the solenoid valve is opened and closed, and setting of the opening / closing time of the solenoid valve. There is an effect that two types of pressure resistance test of hydrostatic pressure / pulsation pressure can be easily performed.

According to the fifth aspect of the present invention, in addition to the above effects, the static pressure test section and the pulsating pressure generation section are constituted by a combination of simple and inexpensive devices, so that the pressure test can be performed with a simple structure. This produces an effect that the device can be manufactured.

According to the sixth aspect of the present invention, in addition to the above effects, the entire apparatus is configured as a single movable unit, so that the pressure resistance test apparatus can be easily moved to the place where the piping is installed. This has the effect that it can be performed.

According to the seventh aspect of the present invention, in addition to the above-described effects, since the control system device is configured as one unit with the control panel, there is an effect that the withstand voltage test device becomes easy to handle.

According to the eighth aspect of the present invention, in addition to the above-mentioned effects, the sound insulation effect of the sound-insulating case can be used to cut off the noise generated by the operation of the pump and the solenoid valve that cause noise, so that the noise during the operation of the apparatus can be reduced. Has the effect of being small.

According to the ninth aspect of the present invention, in addition to the above-described effects, the vibration-proof effect of the vibration-proofing member has an effect that the vibration caused by the pump and the solenoid valve during operation of the apparatus can be reduced.

According to the tenth aspect of the present invention, in addition to the above-described effects, inspection / maintenance / adjustment of devices such as a pump and a solenoid valve in the sound insulation case can be easily performed through the opening of the sound insulation case. It works.

According to the eleventh aspect of the present invention, in addition to the above-described effects, the water tank, the injection unit, the manual on-off valve, the pressure gauge, and the control panel are laid out at easy-to-operate positions. Since the layout is such that it is pushed into the pump, it is possible to improve the pump characteristics while making the device easy to operate.

According to the twelfth aspect of the present invention, in addition to the above-described effects, the strainer can prevent foreign substances such as sand from entering into devices such as pumps and valves, so that failures and malfunctions of the pumps and pipings are prevented. This has the effect of being performed.

According to the thirteenth aspect of the present invention, in addition to the above-mentioned effects, the vibration-proofing effect of the vibration-proofing member has an effect that the vibration of the piping / equipment on the sound-insulating case during the operation of the apparatus can be reduced. .

According to the fourteenth aspect of the present invention, in addition to the above effects, the transparent lid closing the opening of the water tank prevents the fluid stored in the water tank from flowing out when the apparatus is moved. In addition, since the cover is transparent, the water level in the water tank can be easily checked from the outside. According to the invention described in claim 15, in addition to the above effects, there is an effect that the apparatus can be easily moved, carried, and lifted by the handle for transportation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a piping pressure test apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of the same pressure resistance test apparatus.

FIG. 3 is an exploded perspective view for explaining the structure of the withstand voltage test device.

FIG. 4 is a plan view of the same pressure resistance test apparatus.

FIG. 5 is a side sectional view of the withstand voltage test device along the line AA in FIG. 2;

FIG. 6 is a front view of the same pressure resistance test apparatus.

FIG. 7 is a plan sectional view of the withstand voltage test device along the line B-B in FIG. 2;

[Explanation of symbols]

 3b, 3c: Hot water supply pipe, water supply pipe (piping) 4a, 4b: Test gauge section 5: Water pressure resistance test apparatus (withstand pressure test apparatus) 10: Hydrostatic pressure test section (static pressure test section) 11: Pump 11a: Electric pump 11b ... Pump section 12 ... Water tank (reservoir section) 13 ... Coupler (injection section) 15 ... Ball valve (first open / close valve) 17 ... Pressure gauge (pressure detection section) 19 ... Pressure regulating valve 17b, 20,36 ... Vibration isolation rubber 22 ... Strainer 25,56 ... Lid 30 ... Pulsating pressure generating unit 31 ... Solenoid valve (second on-off valve) 34 ... Drain valve 40 ... Control panel 41 ... Control unit 42 ... Operation panel 43 ... Test start / stop button 44 ... Select Switch (switching switch part) 45 ... Number setting part (number setting part) 47 ... Opening / closing timer setting part (Opening / closing timer setting part) 50 ... Bogie 51 ... Caster 52 ... Base 53 ... Sound insulation case 53a ... Mouth portion 54 ... handle for transport.

Claims (15)

[Claims] 1. A pressure fluid is supplied into the pipe through an injection section connected to the pipe, and after the inside of the pipe is pressurized to a predetermined pressure, the state is left as it is and a pressure change in the pipe is detected. After performing the static pressure test, after completing the static pressure test, the internal pressure of the pipe is changed by a predetermined number of times while the inside of the pipe is pressurized to a predetermined pressure by supplying a pressurized fluid through the injection section, and the inside of the pipe is Pulsating pressure is generated.After the generation of the pulsating pressure is completed, the static pressure test is performed again, and a comparison between a pressure change in the static pressure test and a pressure change in the pipe after the pulsating pressure generation test is performed. A method for testing the pressure resistance of a pipe, comprising detecting whether or not the pipe has leaked assuming actual pipe use. 2. An injection unit connected to a pipe, a storage unit for storing a fluid, a pump for pumping fluid in the storage unit through the injection unit into the pipe, and a first opening / closing valve for closing the injection unit. And a pressure detection unit that detects the pressure inside the pipe, and detects a pressure change inside the pipe when the pipe is left while being pressurized to a predetermined pressure by the supply of a pressure fluid. A static pressure test unit, and a second on-off valve for releasing pressure in the piping to the outside through the injection unit, and the second on-off valve is opened and closed a predetermined number of times while the inside of the piping is pressurized at a predetermined pressure by the pump. And a pulsating pressure generating unit that generates a pulsating pressure inside the pipe by performing, after the generation of the pulsating pressure is finished, the static pressure test unit again detects the pressure change inside the pipe, and the detection result and Compare with the previous detection result of the pressure change inside the pipe. It allows pressure test apparatus piping and detecting the presence or absence of leakage of the piping under actual pipe use. 3. The piping pressure test apparatus according to claim 2, wherein the second on-off valve is constituted by an electromagnetic valve whose open time and close time can be set respectively. 4. A switching section for switching between operation of the static pressure test section and operation of the pulsating pressure generation section, a number setting section for setting the number of times of opening and closing of the solenoid valve, and the opening time and closing time of the solenoid valve. 4. A control unit for controlling the pump and the solenoid valve in accordance with each setting of an opening / closing timer setting unit for setting the above, a changeover switch unit, a number setting unit, and an opening / closing timer setting unit. A pressure test device for piping described. 5. The storage unit comprises a water tank; the pump comprises a pump having a pressure regulating valve on a discharge side; the pressure detection unit comprises a pressure gauge; and the first on-off valve is a manual type. An on-off valve, the pump, the manual on-off valve, the pressure gauge, and the injection unit are sequentially connected to an outlet of the water tank, and the static pressure test unit is configured, and a discharge side of the pump and the The piping pressure resistance test apparatus according to claim 4, wherein the pulsation pressure generation unit is configured by interposing the solenoid valve so as to bypass a water tank. 6. The static pressure test section and the pulsating pressure generating section are mounted on a bogie together with the changeover switch section, the count setting section, the open / close timer setting section, and the control section, and are movable. The piping pressure test apparatus according to claim 5, wherein the apparatus is configured as a single unit. 7. The piping according to claim 6, wherein the changeover switch unit, the number setting unit, the opening / closing timer setting unit, and the control unit are assembled into a control panel and configured as one unit. Pressure test equipment. 8. The truck includes a base having casters on a lower portion thereof and a sound insulating case assembled on the upper portion of the base so as to cover the base, wherein the pump and the pump are provided in the sound insulating case. The piping pressure resistance test apparatus according to claim 7, wherein a solenoid valve is housed, and another device is mounted outside the sound insulation case. 9. The pressure test apparatus according to claim 8, wherein the pump and the solenoid valve are mounted on the base via a vibration isolating member. 10. An opening which is opened and closed by a lid is formed in a side wall of the sound insulation case.
2. A pressure resistance test apparatus according to item 1. 11. The control panel and the water tank are assembled on one side of the upper part of the sound insulation case, and a pipe combining the injection part, the manual on-off valve, and the pressure gauge is provided on the other side of the upper part of the sound insulation case. The piping pressure test apparatus according to claim 8, wherein the apparatus is assembled in a pipe. 12. The withstand pressure test apparatus according to claim 11, wherein a strainer is provided in a flow path from the outlet of the water tank to the pump. 13. The pressure test apparatus according to claim 11, wherein the pipe is mounted on an upper part of a sound insulation case via a vibration isolating member. 14. The pressure test apparatus according to claim 11, wherein the opening of the water tank is closed by a removable transparent lid. 15. The pressure test apparatus according to claim 11, wherein a handle for transportation is assembled to a base of the carriage.