JPH0320763Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention is an environmental resistance test for conducting various durability tests such as pressure resistance and temperature resistance of various precision equipment and their parts such as electronic equipment, communication equipment, and photographic equipment. Concerning vessels.

(Background of the invention) The environmental resistance tester is configured as shown in FIG. 1, for example. The tester shown in Fig. 1 has a horizontal bottomed cylinder shape, and an inner cylinder 3 with one end open is provided inside an outer cylinder 2 whose open end can be sealed with a lid 1, and the outer cylinder 2 is heated from the outside. A heater 4 and a heater 5 for evaporating water stored in the lower part of the outer cylinder are provided, and a fan 7 placed in a vent 6 opened at the back of the outer cylinder 3 is connected to a magnetic force formed by an internal magnetic coupling piece 8a and an external magnetic coupling piece 8b. Motor 9 is inserted from outside the outer cylinder via the coupling ring.
A heater 10 is also provided near the fan 7. The test object 11 is placed on a stand 12 inside the inner cylinder 3, and the vapor atmosphere inside the test chamber is adjusted to unsaturated, saturated, and superheated states by controlling the heaters 4, 5, and 10. Perform accelerated testing of the specimen.

By the way, in the environmental tester configured as described above, in order to activate the test object 11 during an accelerated test, the test may be conducted while the test object 11 is energized. For this reason, a plug 1 as shown in FIG.
3 and connect the test object 11 through this plug 13.
It has been conventional practice to energize. This plug 13 has an electrode rod 14 provided at the center surrounded by an insulating material 15 such as insulator or Teflon, except for both ends of the electrode rod, and furthermore, an electrode rod 14 is placed at the center of the electrode rod, and an insulating material 15 such as insulator or Teflon is placed around the outer periphery of the intermediate portion of the insulating material 15. A metal mounting ring 18 having a male thread 16 and a prismatic portion 17 is fixed. By screwing together and tightening, the outer tube 2 is attached so as to penetrate through the peripheral wall surface of the outer tube 2. Or as shown in Figure 3,
In some cases, a flange formed on the outer peripheral surface of the insulating material 15 is clamped and fixed between the outer cylinder wall surface and the gland nut 25. In either case, when energizing the test object 11 inside the outer cylinder 2, one end of the electrode rod 14 protruding into the outer cylinder 2 and the test object 11 are connected to the conductive wire 22 (first
The other end of another conducting wire 23 whose one end was connected to the other end of the electrode rod 14 outside the outer cylinder 2 is connected to a power source (not shown).

However, when current is applied to the test object 11 during an accelerated test in this manner, conventional problems occur as described below. That is, the inside of the outer cylinder 2 during the accelerated test is hot and humid, but the plug 13, which is partially exposed to the outside of the outer cylinder 2, is cooled by the outside air.
The surface temperature of the insulating material 15 constituting the plug 13 becomes lower than the temperature inside the outer cylinder 2. For this reason, the outer cylinder 2
The outer cylinder 2 is attached to the surface of the insulating material 15 exposed inside the outer cylinder 2.
Water vapor contained in the air inside tends to condense,
If dew condensation occurs over the entire surface of the insulating material 15, the insulation between the electrode rod 14 and the metal outer cylinder 2 will become poor.

(Purpose of the present invention) In order to solve the above-mentioned inconveniences, the present invention
The purpose of the present invention is to provide an environmental resistance tester in which water vapor does not condense on the surface of the insulating material that constitutes the plug during accelerated testing.

(Structure of the present invention) The environmental resistance tester of the present invention houses a test object in order to energize the test object, and a plug is inserted through the wall of the container to keep the inside of the container in a hot and humid state. A heater is attached to the outside to heat the plug.

(Embodiments of the present invention) Next, the present invention will be explained in more detail while explaining the illustrated embodiments.

FIG. 4 is an enlarged sectional view corresponding to section A in FIG. 1, showing an embodiment of the present invention. A heater 24 is wound around a cylindrical portion 20 formed at the periphery of a through hole 19 provided in the wall of an outer cylinder 2, which is a container for storing a test object. A female thread 21 formed on the inner peripheral surface of this cylindrical portion 20 is screwed with a male thread 16 formed on the outer peripheral surface of a mounting ring 18 of a plug 13, which is exactly the same as in the case of the conventional environmental tester shown in FIG. By fitting and tightening, the plug 13 is provided to penetrate the wall surface of the outer cylinder 2.

As described above, since the heater 24 is wound around the outer periphery of the cylindrical part 20, which has the female thread 21 formed on the inner peripheral surface for attaching the plug 13, when the heater 24 is energized during the acceleration test, the metal cylindrical part 20 The insulating material 15 of the plug 13 is heated through the mounting ring 18, and the surface temperature of this insulating material 15 becomes higher than the temperature inside the outer cylinder 2. If the surface temperature of the insulating material 15 becomes higher than the temperature inside the outer cylinder 2 in this way, even if the air inside the outer cylinder 2 is hot and humid, water vapor contained in this air will condense on the surface of the insulating material 15. There will be nothing left to do.

(Effects of the present invention) The environmental tester of the present invention is constructed as described above, and in order to prevent water vapor from condensing on the surface of the insulating material inside the container, the electrode rod of the plug is The insulation between the outer cylinder and the outer cylinder does not become defective, electric shocks and other accidents due to current leakage can be prevented, and reliable tests can be performed even in cold regions.

[Brief explanation of the drawing]

Figure 1 shows one of the environmental testers to which the present invention is applied.
Vertical side views showing examples, Figures 2 to 4 show the plug attached to the environmental resistance tester. Figure 2 is the first conventional example, Figure 3 is the second example, and Figure 4 is the conventional one. FIG. 2 is an enlarged sectional view of section A in FIG. 1 showing an embodiment of the invention; 1: Lid, 2: Outer cylinder, 3: Inner cylinder, 4, 5: Heater, 6: Vent, 7: Fan, 8a: Internal magnetic coupling piece, 8b: External magnetic coupling piece,
9: Motor, 10: Heater, 11: Test object, 1
2: Base, 13: Plug, 14: Electrode rod, 15: Insulating material, 16: Male thread, 17: Prismatic part, 18: Mounting ring, 19: Through hole, 20: Cylindrical part, 21: Female thread,
22, 23: Conductor wire, 24: Heater.

Claims (1)

[Scope of utility model registration request] In an environmental tester that performs an accelerated test on the test object by placing the test object in a container and making the inside of the container hot and humid, a plug for energizing the test object is connected from the wall of the container. The plug is provided by screwing onto a cylindrical portion formed in a protruding manner, and the plug is constructed by surrounding a central electrode rod with an insulating material except for both ends of the electrode rod, with both ends protruding from the insulating material. An environmental tester characterized in that a heater for heating is provided surrounding the outer periphery of the cylindrical portion.