JPH035887Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a high-temperature atmosphere material testing device for testing specimens of ceramics and the like in a high-temperature atmosphere.

(b) Prior Art For example, when testing materials in a high-temperature atmosphere under a vacuum atmosphere, a test device is generally used in which a test piece TP is accommodated in a furnace core tube 2 of a heating furnace 1, as shown in FIG. ing. This device applies a tensile load to the test piece TP using a pair of upper and lower load rods 3H and 3L.
H, 3L consist of pull rods 4H, 4L and their connecting fittings 5H, 5L, and are inserted into the furnace core tube 2. Then, in the furnace core tube 2, each load rod 3H, 3
L is fixed and engaged with the test piece TP. To test materials in a high-temperature atmosphere, the inside of the furnace core tube 2 is evacuated by the vacuum exhaust pipe 6 to create a vacuum atmosphere inside the furnace core tube 2 . Then, the test piece TP is heated to a high temperature in the heating furnace 1. At the same time, the crosshead 7 may be raised. The upper load rod 3H is connected via a universal joint 8 to a load cell 9 of the crosshead 7. Therefore, the pull rod 4H is pulled up by the connecting fitting 5H of the crosshead 7, load cell 9, universal joint 8, and load rod 3H. Also, this device has bellows 10H, 1
Flange 11 of connecting fittings 5H and 5L by 0L
The bellows 10H, 10L are designed to seal between both ends of the furnace core tube 2, and the bellows 10H, 10L can expand and contract in the vertical direction to absorb movement of the connecting fitting 5H of the load rod 3H and the pull rod 4H.
Therefore, each load rod 3H, 3L can apply a tensile load to the test piece TP, and the load cell 9 can detect the load on the test piece TP. Therefore, test specimens under vacuum atmosphere
TP can be tested as a high temperature atmosphere material. After the test, the tested specimen TP is removed from the testing apparatus and replaced with the next specimen. The next specimen is then subjected to a high temperature atmosphere material test.

However, this device had a drawback in that it was not easy to replace the test piece TP. As shown in FIG. 3, the heating furnace 1 has a cylindrical shape divided into two parts, and is supported by an arm 12. As shown in FIG. Test pieces
To replace the TP, open the heating furnace 1 from side to side. Then, the heating furnace 1 is moved backward by the arm 12,
The furnace core tube 2 is exposed to the outside. After that, pin 1 is connected to the connecting fittings 5H and 5L of each load rod 3H and 3L.
Remove 3H and 13L and install universal joint 8
Remove the connecting fitting 5H of the load rod 3H from the
Connecting fitting 5L from stand 14 to load rod 3L
Remove. With this, the load rods 3H and 3L
Then, the entire furnace core tube 2 is removed from the test apparatus. Furthermore, the flanges 11H of the load rods 3H and 3L,
Remove bolts 15H and 15L from 11L, disassemble the whole thing, and replace the test piece TP. Then, the load rods 3H, 3L and the entire furnace core tube 2 must be reassembled and attached to the test equipment.
The operation was not easy.

(c) Purpose This invention is a material testing device of this type.
This was done to facilitate the exchange of test pieces.

(d) Structure This idea shortens one of a pair of load rods inserted into the furnace core tube of a heating furnace, and connects it to a load detector that detects the load on the test piece. , the other load rod is made longer and its length is selected to correspond to the length of the furnace core tube. Further, the furnace core tube is guided so as to be displaceable in the axial direction along the other load rod.

(e) Examples Examples of this invention will be described below. FIG. 1 shows an embodiment of this invention. The test piece TP is housed in a furnace core tube 16 of the heating furnace 1 . The heating furnace 1 is similar to the heating furnaces shown in FIGS. 2 and 3. This device consists of a pair of upper and lower load rods 17H, 1.
7L, load rods 17H, 17L are pull rods 18H, 18L and intermediate rods 19H, 19L.
It is inserted into the furnace core tube 16. Then, the pull rods 18H and 18L are fixed to the intermediate rods 19H and 19L by the cap nuts 20H and 20L, and the test piece TP is fixed to the pull rod 1 by the screw.
It is fixed at 8H and 18L. Therefore, each load rod 17H, 17L is fixed to and engaged with the test piece TP within the furnace core tube 16.

In this embodiment, a short rod is used as the intermediate rod 19H of the upper load rod 17H, and a longer rod is used as the intermediate rod 19L of the lower load rod 17L. Pullrod 18
H and 18L have the same length. Therefore, the upper load rod 17H is short and the lower load rod 17L is long. And the upper load rod 17H
middle rod 19H is universal joint 8
The universal joint 8 is connected to a load cell 9 of the crosshead 7. The intermediate rod 19L of the lower load rod 17L extends toward the table 21, and the boss 22 of the table 21
Fixed. The length of the lower load rod 17L, that is to say the length of the pull rod 18L and the intermediate rod 19L, is selected to correspond to the length of the furnace core tube 16.

Further, this device has a pair of upper and lower sleeve flanges 23H and 23L, and the sleeve flange 23
H, 23L are fitted into intermediate rods 19H, 19L of each load rod 17H, 17L, and fitted into the upper and lower ends of the furnace core tube 16. Furthermore, the sleeve flanges 23H, 23L and the intermediate rod 19
O-rings 24H, 24L are provided between the furnace core tube 16 and sleeve flanges 23H, 23L, and the furnace core tube 16, sleeve flanges 23H, 23L, and intermediate rods 19H, 19L are provided by the O-rings 24H, 24L. The space is sealed.
The lower sleeve flange 23L is connected to the load rod 17
It can slide along the intermediate rod 19L of L. Thereby, the furnace core tube 16 is guided so as to be axially displaceable along the lower load rod 17L. The upper sleeve flange 23H has a vacuum exhaust pipe 25 that evacuates the inside of the furnace core tube 16.
It can slide along the intermediate rod 19H of the load rod 17H.

In the test apparatus configured as described above, the inside of the furnace core tube 16 is evacuated by the vacuum exhaust pipe 25 to create a vacuum atmosphere inside the furnace core tube 16, and the test piece TP is heated by the heating furnace 1. Heat to high temperature. When the crosshead 7 is raised, the pull rod 18H is pulled up by the load cell 9, the universal joint 8, and the intermediate rod 19H of the load rod 17H. Each sleeve flange 23H, 23L slides along an intermediate rod 19H, 19L of each load rod 17H, 17L,
It absorbs the movement of the intermediate rod 19H and pull rod 18H of the load rod 17H. Therefore, each load rod 17H, 17L can apply a tensile load to the test piece TP, and the load cell 9 can detect the load on the test piece TP.
Therefore, the test piece TP can be subjected to a high temperature atmosphere material test in a vacuum atmosphere.

Further, in this device, the upper load rod 17H is shortened and connected to the load cell 9 of the crosshead 7, so that the test piece TP, the load rod 17H, and the load cell 9 can be accurately centered. Therefore, there is no risk that the detection accuracy of the load cell 9 will be impaired.

Furthermore, in this device, the lower load rod 17L is made longer and its length is selected to correspond to the length of the furnace core tube 16, so that the test piece TP can be easily replaced. To replace the test piece TP, the heating furnace 1 is opened from side to side, and the heating furnace 1 is moved back by the arm 12 of the heating furnace 1 to expose the furnace core tube 16 to the outside. Thereafter, the furnace core tube 16 and the lower sleeve flange 23L are pulled down to separate the upper end of the furnace core tube 16 from the upper sleeve flange 23H. Then, the lower sleeve flange 23L is slid along the intermediate rod 19L of the load rod 17L to displace the furnace core tube 16 in the axial direction and lower it to the position indicated by the chain line. This allows the test piece TP to be exposed to the outside. after that,
Intermediate rod 19H of load rods 17H and 17L,
Remove bag nuts 20H and 20L from 19L,
Remove pull rods 18H and 18L. Then,
Simply remove the test piece TP from pull rods 18H and 18L and replace it with the next test piece. There is no need to remove the load rods 17H, 17L and the entire furnace core tube 16 from the test apparatus, and the operation is easy.

In addition, in this example, the case where the test piece is subjected to a high temperature atmosphere material test in a vacuum atmosphere has been explained, but an inert gas is introduced into the furnace core tube 16, and the test piece TP is subjected to a high temperature atmosphere material test under an inert gas atmosphere. It can also be tested. Each load rod 17H, 17L
It is also possible to apply other test loads such as bending load to the test piece TP by replacing the pull rods 18H and 18L with other loading jigs.

(f) Effects As explained above, this invention shortens one load rod and connects it to the load detector that detects the load on the test piece, so the test piece, load rod, and load detector can be connected accurately. Can be centered on the ring. Therefore, there is no possibility that the detection accuracy of the load detector will be impaired. Furthermore, the other load rod is made longer and its length is selected to correspond to the length of the furnace core tube. Since the furnace core tube is guided so as to be axially displaceable along the other load rod, the test piece can be replaced simply by displacing the furnace core tube in the axial direction. It is not necessary to remove the load rod and the entire furnace core tube from the test apparatus, the operation is easy and the intended purpose can be achieved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of this invention.
FIG. 2 is a longitudinal cross-sectional view showing a conventional test apparatus, and FIG. 3 is a cross-sectional view showing the configuration of the heating furnace shown in FIG. TP...Test piece, 1...Heating furnace, 9...Load cell, 16...Furnace core tube, 17H, 17L...Load rod, 23H, 23L...Sleeve flange.

Claims (1)

[Scope of utility model registration request] A test piece is housed in a furnace core tube of a heating furnace, a pair of load rods are inserted into the furnace core tube, each of the load rods is engaged with the test piece in the furnace core tube, and a vacuum is created in the furnace core tube. Generate a test atmosphere such as atmosphere, heat the test piece to a high temperature by the heating furnace, and at the same time apply a test load to the test piece by each of the load rods to perform a high temperature atmosphere material test on the test piece. In the apparatus, one of the load rods is shortened and connected to a load detector that detects the load on the test piece, and the other load rod is lengthened and connected to the load detector for detecting the load on the test piece. A high-temperature atmosphere material testing device, characterized in that the length is selected to correspond to the length of the furnace core tube, and the furnace core tube is guided so as to be displaceable in the axial direction along the other load rod.