JPS58126Y2 - High temperature internal pressure, tension, compression, torsion test equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in a testing device for conducting combined tests of tension, compression, torsion and internal pressure on metallic materials at high temperatures.

Conventionally, there have been individual testing devices as described above, but the present invention attempts to provide a testing device that can perform the four types of composite tests described above at high temperatures of 200° C. or higher in a complete state.

An example device of this invention will be described below.

Fig. 1 is a cross-sectional structural diagram of the test device according to the present invention;
The figure is a cross-sectional structural diagram of a conventional room temperature internal pressure, tension, compression, and torsion testing apparatus, and FIG. 3 is a cross-sectional structural diagram of a conventional high-temperature internal pressure, tension, and compression testing apparatus.

First, four types of conventional composite test apparatuses at room temperature shown in FIG. 2 will be described.

In the figure, 1B is a test piece, 2B is a fixed side grip part, 3 is a moving side grip part, 4 is a stick, 7 is an O-ring, 8 is a core, 9
1 is a fixed bolt, 12 is a fixed head, 13 is a movable head, and 14 is a core.

In the internal pressure test, a maximum internal pressure of about 1,500 atmospheres is applied to the inner cavity of the test piece 1B. To improve the pressurizing effect, a core 8 is inserted inside the test piece, and a blind stopper 14 is inserted into the opening of the test piece. The hole on the right end is sealed by welding to the hole.

Thereafter, the test piece 1B is screwed into the grip portions 2B and 3 on both sides, and then a screwdriver 4 is driven into the screw portions on both sides as shown to fix the positions of the test piece and the grip portions.

Note that high-pressure gas is sent into the inner cavity of the test specimen 1B from the direction of the arrow, but since this device is applied to normal temperature tests, it is normally
The ring 7 can sufficiently seal the internal pressure.

Furthermore, the grip portions 2B and 3 on both sides are fixedly attached to the stationary side head 12 and the movable side head 13 with fixing bolts 9, respectively.

In this device, the tensile and compressive loads can be sufficiently withstood by the screw sides on both sides of the test specimen 1B, and the torsional loads are borne and absorbed by the forward and reverse rotational torque at the kotsuta driving parts on both sides, so the device itself is not strained. Instead, all the load is applied to the thin circular tube part of the test piece, and the test is carried out without any problems.

Of course, this test device is for room temperature use, and when the temperature reaches 200° C. or higher, the internal pressure seal deteriorates with the ordinary O-ring 7 and becomes useless, so another measure must be taken.

Next, Figure 3 shows a combined test device for high temperature internal pressure, tension, and compression.

The heating device was provided on the outer periphery of the pressure receiving part at the center of the hollow cylinder ρ of the test specimen 1C.

(not shown).

In the figure, 5 is a seal piece made of stainless steel or heat-resistant steel.

This is a cylindrical body with a hole in the center with conical surfaces on both sides.

This seal piece is inserted between the conical concave surface 1C' provided on the end surface of the test specimen 1C and the conical concave surface 2C' of the inner cavity of the fixed side grip part 2C by screwing the test piece 1C into the grip part 2C, and the tightened internal pressure is applied. It is sealed.

In this case, the screw that connects the test piece 1C and the fixed side grip part 2C is used for tensile and compressive loads and for sealing internal pressure, but the position of the screw part is displaced due to thermal expansion due to high temperature. Furthermore, since the positions of the conical concave surfaces 1C' and 2C', which are located close to the screw, change in position, internal pressure leaks between the seal piece 5 and the conical concave surfaces 1C' and 2C'.

However, since this device is not equipped with a cock for torsion testing, it is assumed that the displacement of the threaded portion is also more susceptible to the effects of thermal expansion.

The existing equipment was improved to eliminate internal pressure leaks and a structure was added to support torsion tests, making it suitable for combined tests of internal pressure tension, compression, and torsion at high temperatures. is the main point of this idea.

FIG. 1 shows a test device according to an embodiment of this invention.

In order to cope with torsion tests, this device takes measures to absorb the burden of torsional torque in both forward and reverse rotational directions by driving cotters 4 into the respective screw retracted parts of the test piece 1, fixed grip part 2, and movable grip part 3. I'm taking it.

Particular consideration was given to countermeasures against internal pressure leakage under high temperatures in this example device, and one of the measures was to ensure that the threaded portion that connects the test piece 1 and the fixed grip portion 2 was designed to withstand tensile and compressive loads. , the threaded part for the internal pressure seal is provided separately.

The sealing piece 5 is positioned farther away from the coupling thread in the longitudinal direction of the test piece, and the concave concave surface 1' of the inner cavity of the test piece is set farther away from the thread.

In addition, 6 is a newly provided seal rod, and a conical concave surface 6' corresponding to the outer conical surface of the seal piece 5 is formed by screwing the male thread 6" into the female thread 1" at the inner end of the test piece 1. 5 to seal the internal pressure.

That is, a threaded portion for internal pressure sealing is specially installed.

10 is a cooling device, and 11 is cooling water.

The seal rod 6 is extended longitudinally through the hole in the fixed head 12, and is constantly cooled by a cooling device 10 and is sealed inside the fixed head 12 by an O-ring 7 in a low-temperature location that does not affect the O'Jing characteristics. It seals the internal pressure between it and the cavity.

As mentioned above, if this device is used, complex stress tests with high temperature internal pressure can be carried out without any problems without causing internal pressure leaks due to the effects of tension, compression, and torsion loads.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional structural diagram of the test device according to the present invention;
The figure is a cross-sectional structural diagram of a normal temperature internal pressure, tension, compression, and torsion testing apparatus, and FIG. 3 is a cross-sectional structural diagram of a high-temperature internal pressure, tension, and compression testing apparatus. 1, I B, I C: test piece, 1', IC': conical concave surface of the test piece, 1'': female thread on the seal rod thread side of the test piece,
2, 2B, 2C: Fixed side gripping part, 2C': Conical concave surface of fixed side gripping part, 3.3C: Moving side gripping part, 4: Kotta, 5: Seal piece, 6: Seal rod, 6': Seal rod conical concave surface, 7:0 ring, 8: core, 9: fixing bolt, 1
0: Cooling device, 11: Cooling water, 12: Fixed side head, 1
3: Moving side head, 14: Blind plug.

Claims (1)

[Scope of utility model registration request] A heating device was installed around the outside of the pressure-receiving part of a test piece whose pressure-receiving part was formed into a hollow cylindrical shape, and screws and cocks were installed on the outer diameter part of the pressure-receiving part at equal distances on the left and right to fix it, and the test piece was fixed and supported by grips on both moving sides. A high-temperature internal pressure, tension, compression, and torsion testing device comprising internal pressure seals provided at two locations: the inner cavity on the fixed grip side of the piece and the extension line in the G direction, and a cooling device installed midway between the two points.