JPH10300654A - Internal pressure breaking tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a test in safety by inserting a core into a test body, making a circulation path in the core for internally pressurizing and performing a breaking test and supplying a high temperature heating medium externally. SOLUTION: A core 2 for reducing the volume of a test body 1 is provided in the test body 1. The gap between the core 2 and the test body 1 is filled with a pressurized medium 3 being supplied by a high pressure pump 9 through a pressurization hole 11. A heating medium 7, i.e., high temperature high pressure water, is circulated through the core 2 by means of a circulation facility 10 in order to heat the pressurized medium 3 and the test body 1 through the core 2. An auxiliary heater 4 is arranged on the outside of the test body 1 in order to regulate the temperature distribution thereof more uniformly and the auxiliary heater 4 is covered with a thermally insulating material 5. When the pressurized medium 3 and the test body 1 reaches a specified temperature, the pressurized medium 3 is pressurized gradually by means of a high pressure pump 9 and a breakage is generated in the test body 1 from an initial crack 6 and then the braking pressure is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal pressure rupture test apparatus applied to the measurement of the pressure resistance of a container or a pipe under high temperature and high pressure.

[0002]

2. Description of the Related Art Conventionally, an internal pressure fracture test has been performed on a test body such as a test container or a pipe in order to grasp a safety margin against destruction due to a crack or a defect in the test vessel or a pipe. In the conventional internal pressure destruction test, when the test temperature is high, the inside of the test specimen is filled with the heated pressurized medium, and if necessary, a heater is installed outside the test specimen, and the heat insulation is used to further insulate the test specimen. For example, the pressure medium and the test body are maintained at a predetermined high temperature. When the volume of the specimen is large, a core is inserted into the specimen to reduce the volume of the specimen.

[0003]

In the conventional internal pressure destruction test as described above, when the internal pressure destruction test is performed under high temperature and high pressure, the amount of the pressurized medium used must be minimized in order to safely perform the internal pressure destruction test. There is a need to. It takes time to raise the temperature of the test specimen and the core to a predetermined high temperature only with this minimum pressurized medium, and if the heating depends on a heater installed outside the test specimen, the temperature distribution in the test specimen will be uniform. There are problems such as difficulty in becoming.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by inserting a core into a test body and applying a high-temperature pressurized medium to the inside of the test body. In the internal pressure destruction test apparatus for performing a destructive test at a high temperature of the test body by applying pressure, a circulation path is provided inside the core and a high-temperature heating medium is supplied from the outside. That is, in the internal pressure destruction test apparatus, a core for reducing the volume of the test body is provided inside the test body, and a pressurized medium is filled between the core and the test body. Then, by providing a circulation passage inside the core and supplying and circulating a high-temperature heating medium from the outside, the pressurized medium and the test body are heated via the core. In addition, an auxiliary heater may be provided outside the test object as needed, and the temperature distribution of the test object may be adjusted so as to be more uniform from inside and outside.

As described above, by inserting the core into the test piece, the amount of the pressurized medium to be used is reduced and the amount of the pressurized medium released to the atmosphere when the test piece is broken by the internal pressure is reduced. Become. In addition, by circulating a high-temperature heating medium inside the core, the temperature is increased mainly in the order of the core, the pressurized medium, and the test piece due to heat conduction, so that a temperature distribution hardly occurs inside the test piece. The temperature uniformity in the thickness and in the vertical direction can be further improved. As a result, it becomes possible to carry out a safer internal pressure rupture test and to carry out an internal pressure rupture test of the test body under a uniform high temperature.

[0006] If necessary, a heater is also provided outside the test piece to heat the test piece, whereby fine control of the temperature in the thickness of the test piece and the vertical direction of the test piece can be performed.

[0007]

1 and 2 are explanatory views of an internal pressure rupture test apparatus according to an embodiment of the present invention. In the figure, the internal pressure destruction test apparatus according to the present embodiment is used for measuring the pressure resistance to the internal pressure of containers and pipes at high temperatures and high pressures, and has a safety margin against destruction of test containers and pipes due to cracks and defects. In order to grasp the degree, the inside of the core installed inside the test body such as a test container and piping is filled with a heating medium such as high-temperature and high-pressure water.
This makes it possible to perform internal pressure destruction tests on test specimens such as test vessels and pipes under uniform high temperature and high pressure. In the figure, reference numeral 1 denotes a test specimen, 2 denotes a core, 3 denotes a pressurized medium,
Is an auxiliary heater, 5 is a heat insulating material, 6 is an initial crack, 7 is a heating medium of high-temperature and high-pressure water, 8 is a circumferential welding, 9 is a high-pressure pump for pressurizing, 10 is a circulating equipment for high-temperature and high-pressure water, and 11 is a heating unit. Pressure hole, 12 is a heating medium conduit, 13 is a hot junction mounting hole, 1
4 is a mirror part, 15 is a flange, 16 is a bolt, and 17 is a nut.

As shown in FIG. 1, an initial crack 6 is previously formed on the inner surface of the test piece 1. Inside the core 2, a high-temperature and high-pressure water conduit 12 is provided.
By circulating the heating medium 7 made of high-temperature and high-pressure water through the conduit 12, the pressure medium 3 and the test body 1 are raised to a predetermined temperature via the core 2 and maintained at a constant temperature. It has become. The test piece 1 is provided with hot junction mounting holes 13 at three locations in the axial direction near the inner surface of the plate thickness, at the center, and at the outer surface at three locations in the axial direction. The temperature and flow rate of the pressurized medium 3 can be adjusted by the auxiliary heater 4 and the heat retaining material 5 so that the effective portion of the test body 1 has a temperature as uniform as possible. The size of the initial crack 6 is determined based on the shape and size of the test specimen 1. In manufacturing the core 2, the flange 15 and the main body of the core 2 are machined by a deep hole drilling method, and the mirror portion 14 is attached to the main body of the core 2 by welding 8 in the circumferential direction.

When an internal pressure rupture test is performed on the test piece 1 using this apparatus, a core 2 is provided inside the test piece 1 to reduce the volume of the test piece 1 as shown in FIG. The pressurizing medium 3 is filled between the core 2 and the test piece 1 through the pressurizing hole 11 by the high-pressure pump 9. Inside the core 2, a heating medium 7 made of high-temperature and high-pressure water is circulated by a circulation device 10, thereby heating the pressurized medium 3 and the test body 1 via the core 2. An auxiliary heater 4 is provided outside the test body 1.
The temperature distribution of the test specimen 1 is adjusted to be even more uniform by operating it as needed, and the outside of the auxiliary heater 4 is covered with a heat insulating material 5 of a heat insulating material to keep the temperature. An initial crack 6 is provided on the inner surface of the test body 1. A heating medium 7 of high-temperature and high-pressure water is circulated from a circulation device 10 through a conduit 12 inside the core 2, and the pressurized medium 3 and the test piece 1 are raised to a predetermined temperature through the core 2 to be constant. To hold. The effective portion of the test piece 1 is made as uniform as possible through the warming points of the hot junction mounting holes 13 on the inner side, the central portion, and the outer surface provided at the three upper, middle, and lower positions in the axial direction of the test piece. The temperature and flow rate of the pressurized medium 3 are adjusted by the auxiliary heater 4 and the heat retaining material 5 so as to reach the temperature.

Then, the pressurizing medium 3 is gradually pressurized through the pressurizing hole 11 by the high-pressure pump 9 to cause the test piece 1 to break from the previously applied initial crack 6, and the breaking pressure at that time is obtained. Although the size of the initial crack 6 is determined by the shape and dimensions of the test piece 1, it is usually much larger than the hot-junction mounting hole 13. There is no starting point.

In the conventional internal pressure destruction test, when performing an internal pressure destruction test under high temperature and high pressure, it is necessary to minimize the amount of the pressurized medium used in order to safely perform the internal pressure destruction test. It takes time to raise the temperature of the test specimen and the core to a predetermined high temperature only with this minimum pressurized medium, and if the heating depends on a heater installed outside the test specimen, the temperature distribution in the test specimen will be uniform. There are problems such as difficulty in becoming.

On the other hand, in the internal pressure destruction test apparatus, the heating medium 7 is supplied to the inside of the core 2, circulated and discharged, so that the core 2, the pressurized medium 3 and the test body 1 are transferred by heat conduction. In addition to heating, an auxiliary heater 4 is provided outside the test piece 1 as necessary to minimize the difference in temperature distribution in the test piece 1 and is inserted into the test piece 1 to be subjected to an internal pressure breakdown test. The core 2 is provided with a circulating device 10 for supplying and circulating and discharging the heating medium 7 into the core 2, a passage, a conduit 12, and the like. Tests are to be performed.

As described above, by inserting the core 2 into the test body 1, it is possible to reduce the volume of the test body 1 and minimize the amount of the pressurized medium 3 used. Therefore,
When the test body 1 breaks, the amount of the pressurized medium 3 released into the atmosphere is reduced, and the safety in performing the internal pressure breaking test is increased.

Further, by circulating the high-temperature heating medium 7 inside the core 2, the core 2, mainly by heat conduction,
The temperature is increased in the order of the pressurizing medium 3 and the test piece 1, and a temperature distribution hardly occurs inside the test piece 1. Further, by operating the external heater 4 as needed, fine control of the temperature in the plate thickness of the test piece 1 and the vertical direction of the test piece 1 can be performed.

Thus, a safer internal pressure destruction test by reducing the weight of the pressurized medium 3 becomes possible, and the test piece 1
It is possible to further improve the uniformity of the temperature within the sheet thickness and in the vertical direction, and to perform the internal pressure fracture test of the specimen 1 under a uniform and constant high temperature, thereby improving the test accuracy. it can.

[0016]

The internal pressure rupture test apparatus according to the present invention is configured as described above. By inserting the core into the test piece, the amount of the pressurized medium used is reduced and the test piece is pressurized. As a result, the amount of the pressurized medium released to the atmosphere when broken is reduced. In addition, by circulating a high-temperature heating medium inside the core, the core, the pressurizing medium, and the specimen are heated in order in the order of heat conduction, so that a temperature distribution hardly occurs inside the specimen, and the The temperature uniformity in the thickness and in the vertical direction can be further improved. As a result, it is possible to carry out a safer internal pressure rupture test and to perform an internal pressure rupture test of the test piece under a uniform high temperature, thereby improving the test accuracy in the internal pressure rupture test. .

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of an internal pressure rupture test apparatus according to an embodiment of the present invention, and FIG. 1B is a detailed view of a portion B in FIG. 1A.

FIG. 2 is a sectional view of the core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Test body 2 Core 3 Pressurized medium 4 Auxiliary heater 5 Insulation material 6 Initial crack 7 Heating medium by high temperature and high pressure water 8 Circumferential welding 9 High pressure pump for pressurization 10 High temperature and high pressure water circulation equipment 11 Pressurized hole 12 Heating medium Pipe 13 hot junction mounting hole 14 mirror part 15 flange 16 bolt 17 nut

Claims (1)

[Claims] An internal pressure rupture test apparatus for inserting a core into a test body and pressurizing the inside of the test body with a high-temperature pressurizing medium to perform a destructive test of the test body at a high temperature. An internal pressure destruction test apparatus characterized in that a circulation passage is provided inside a child and a high-temperature heating medium is supplied from the outside.