JPH0645243Y2 - Constant temperature bath for material testing machine - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a thermostatic chamber in which a test piece is circulated with air set to a constant temperature to keep the test environment at a constant temperature.

B. Conventional technology Conventionally, a constant temperature bath is used when performing a strength test of a material (test piece) at a certain temperature. This constant temperature bath is usually constructed as a bath separate from the tester so that the bath moves forward and backward with respect to the test piece under the load test. Further, this constant temperature bath is configured so that air is circulated therein, and air set to a constant temperature is circulated to the test piece.

C. Problems to be solved by the invention The constant temperature bath has an air outlet for circulating air, and an air damper for adjusting the air flow is installed behind it. Although the temperature distribution is determined by the direction (gradient) of the air damper, it is necessary to finely adjust the direction of the air damper in order to obtain a good temperature distribution. Since this adjustment requires fine precision, if the adjustment is erroneous, the temperature distribution in the test environment becomes worse.

D. Means for Solving Problems The constant temperature bath according to the present invention has a complicated shape in which air is turbulent by bending the blades instead of using simple plates. Specifically, the bending is alternating and changes in size on both sides of the plate surface.

E. Action The air flowing out of the air outlet becomes a turbulent flow in the air damper, and this disturbance effect maintains and adjusts the temperature distribution of the entire air flow.

F. Embodiment The present invention will be described below according to an embodiment shown in the drawings.

FIG. 1 is a sectional view showing a constant temperature oven according to the present invention,
The CD represents the entire temperature chamber and is mounted on the pedestal 1. Wheels 10 are installed at the bottom of the whole constant temperature oven CD, and the whole constant temperature oven CD moves in the direction of the arrow. That is, although not shown on the left side of the figure, the test piece under load is positioned so that the entire constant temperature chamber CD moves forward and backward with respect to the test piece. Upon advancing to the test piece, the rod adapters 4 and 5 installed on the upper and lower sides of the thermostat frame 2 are removed and the test piece is set at this position.

The constant temperature bath CD has a U-shaped cross section, and a circulation guide wall 6 is installed in the center. Reference numeral 7 is a nozzle for ejecting gas from the liquefied gas tank 11, and the gas from this nozzle 7 is sent upward by a fan 8. The reference numeral 9 heats the air pressure-fed by the heater to a constant temperature and sends it from the upper outlet H to the test side room. The air will reach the fan from below and be recirculated. Reference numeral 12 is a temperature controller for adjusting the temperature of the heater 9 by receiving a signal from the thermocouple 13. Further, 3 is a front door, and a peep window 15 is provided in this door 3.

In the above structure, the air damper 14 is installed at the outlet H. The plate of the air damper 14 is bent as shown in FIG. 14L and 14R indicate bent plates and are alternately provided. The size of the bending, the width of the bending plate, and the length can be variously changed.

A turbulent flow occurs in the air due to the bent air damper 14, and the disturbing effect maintains and adjusts the temperature distribution of the entire air flow.

The features of the present invention are as described above, but include various modifications without being limited to the illustrated examples. For example, in the illustrated example, two air dampers are installed,
The number may be one or three. Further, the air damper may be swung.

G. Effect of the device It is possible to make the temperature distribution of the test environment uniform and to improve the accuracy of the test.

[Brief description of drawings]

FIG. 1 is a sectional view showing a constant temperature bath according to the present invention, and FIG. 2 is an enlarged perspective view showing an essential part of the present invention. CD …… Constant bath, 2 …… Constant bath frame, 3 …… Door, 4,5 …… Rod adapter, 7 …… Nozzle, 8 …… Fan, 9 …… Heater, H …… Blowout port, 14 …… Air damper, 14L, 14R …… Bending plate.

Claims (1)

[Scope of utility model registration request] 1. A constant temperature bath in which a test piece to be load tested is located inside and a constant temperature of a test environment is maintained by circulating air set to a constant temperature in the test piece. A constant temperature bath for a material testing machine, characterized in that a blade of an air damper installed in a system for guiding air to a test piece is bent to form a turbulent flow in an air flow guided to the test piece.