JP6896132B1 - Reinforcement structure of environmental tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing structure for minimizing the spread of damage when a pressure increase such as an explosion occurs in a tank of an environmental tester. SOLUTION: A handle is provided on the door of an environmental tester so as not to fall off when a pressure rises such as an explosion, and the weight is substantially opposed to the upper part of an explosion emission port provided in a constant temperature bath 1 with a rotation shaft 12 as the center. Alternatively, a pair of wings having different lengths are provided, and the radiation port is closed with a rotary shielding plate 11 provided with a weight or an urging means so that the pair of wings are balanced. Normally, the pair of wings is used to block the radiation port. When the pressure rises such as an explosion, the pair of wings will rotate to open the radiation port, and after the pressure rise has subsided, the pair of wings will return to block the radiation port with the weight or urging means. Reinforced structure of the environmental tester, which is characterized by the fact that it has been used. [Selection diagram] Fig. 3

Description

The present invention relates to a reinforcing structure for minimizing the spread of damage when a pressure increase due to an explosion or the like occurs in the tank of an environmental tester.

When a pressure rise such as a gas explosion occurs in the tank of the environmental tester, the pressure inside the tank is released to the outside, and there are explosion emission ports having various structures to prevent the device environmental tester from being completely destroyed.
At the time of an explosion or the like, if the maximum pressure is low, the opening area of the emission port can be reduced, but if the maximum pressure is high due to a gas explosion or the like, the opening area also needs to be increased.
In the case of an environmental tester, in order to precisely control the internal temperature and humidity, heat insulation of the explosion emission port is required.
Therefore, in the case of an explosion emission port having a heat insulating structure, if a rupture plate type is equipped as an explosion emission port at the time of a gas explosion or the like, the emission port opens after pressure is released, so that it burns even after an explosion like a secondary battery, for example. If a phenomenon accompanied by the above occurs, the outside air cannot be shut off, and the flammable gas and air may mix, causing an explosion and combustion to continue.
Therefore, the environmental tester of Japanese Patent Application Laid-Open No. 2016-176792 has a composite explosion emission port and a protective device. The composite type explosion emission port has a plosive plate type explosion emission port and a return type explosion emission port.
The composite explosion emission port is formed with a small opening that penetrates the front and back surfaces. An opening / closing member is provided at the opening end on the upper side of the small opening. The opening / closing member swings from a horizontal posture around the hinge to a standing posture position in contact with the stopper. The stopper is provided with an open detection means. A blockade detecting means is provided in the vicinity of the opening end on the upper side of the small opening.
In the above configuration, it is necessary to provide a plosive plate type explosion emission port and a return type explosion emission port, respectively, which may complicate the structure.
Also, in order to prevent the door from opening easily when an explosion occurs in the tank, in the case of a mechanism that tilts the handle when opening and closing with a screw type handle, the direction of rotation is opposite to the direction of rotation of the door. Stress may be applied in the direction in which the handle escapes from the fixing groove.
Regarding the mechanical part of the handle, the stress value at which the handle falls off can be easily confirmed by a tensile strength test, etc., but if the desired strength cannot be secured, the handle slips on the plate that fixes the handle and shaft and escapes. The handle has fallen off and the door cannot be held.
Therefore, in order to increase the strength of the tensile test, it is necessary to increase the size of the mechanical parts, change to a stronger material, and take measures to increase the length of the groove and handle so that they will not fall off, but the equipment is bulky. There is a problem that it is stretched and complicated.

JP 2016-176792

The problem to be solved by the present invention is that when a pressure rise such as an explosion occurs in the tank of the environmental tester, a pair of wings substantially facing each other around the rotation axis is provided above the explosion emission port. When the pressure rises such as an explosion, the emission port can be opened without hindering the rising pressure, and after the pressure rise has subsided, the emission port can be shielded and the handle can be held without falling off. The purpose is to provide a reinforced structure for environmental testers that has been made possible.

According to the present invention, when a pressure rise such as an explosion occurs in a constant temperature bath of an environmental tester, a pair of wings substantially facing each other about the rotation axis are provided at the upper part of the radiation port, so that the pressure rises when the pressure rises. A rotary shielding plate with a pair of wings is provided so that the emission port can be opened without obstructing the air pressure, and when the wind pressure due to the pressure increase disappears, the emission port is closed by the returning means. Regarding the reinforced structure of the environmental tester.

In the present invention, the rotary shielding plate 11 has a well-balanced emission port with wide blades and narrow blades urged by an urging means such as a weight, with the rotation axis in the middle during normal temperature / humidity control. It closes almost horizontally to maintain heat insulation.
When the pressure rises due to a gas explosion or the like, the wide blades and the narrow blades can rotate in an upright posture to dissipate the rising pressure against the urging force of the urging means.
After the emission port is opened, when the rising pressure drops and subsides, the wide and narrow wings rotate again in a substantially horizontal position due to the returning force of the urging means, and by closing the emission port, the inside of the tank of the outside air. It is possible to prevent the inflow to.

It is a schematic diagram which shows the relationship between a constant temperature bath and a discharge port. It is explanatory drawing which shows the state of the emission port at the time of pressure rise such as an explosion. It is explanatory drawing which shows the state of the emission port after the pressure rise has fallen and settled. It is a side view of the state which the emission port is closed. It is the same plan view. It is a side view which shows an example of the fall prevention handle. It is a front view of a handle structure. (A) is a plan view of the plate portion, and (b) is a side view of the same. It is explanatory drawing which shows the relationship between a packing and a metal frame.

Hereinafter, preferred examples of the present invention applied to an environmental tester provided with an explosion emission port will be described with reference to the drawings.

{Shielded explosion outlet}
When a pressure rise such as a gas explosion occurs, it is necessary to release the internal pressure to the outside to prevent the device from being completely destroyed.
In the case of an explosion emission port having a heat insulating structure, in the case of the burst plate type as an explosion emission port in the case of a gas explosion in the conventional method, the emission port opens after pressure is released, so that after an explosion, for example, a secondary battery. However, when a phenomenon involving combustion occurs, it is conceivable that the outside air cannot be shut off, the flammable gas and air are mixed, and the explosion and combustion continue.

Therefore, in the explosion emission port structure of this embodiment, as shown in FIG. 1, there is a constant temperature bath 1 at the bottom, and heat insulating layers 2A and 2B are formed on the left and right so as to surround the constant temperature bath 1.
A bottom plate 3 is formed on the bottom surface of the constant temperature bath 1, and an upper lid plate 4 is formed on the upper surface.
The space 5 in the middle stage above the constant temperature bath 1 is covered on the left and right with the emission port covers 6A and 6B, and the regulation bar 7 is provided in the center.
The upper part of the space 5 is covered with a ceiling net 8.

The space 9 above the ceiling net 8 is surrounded on the left and right sides by the shielding portion covers 10A and 10B, and the upper surface of the radiation port 16 is closed by a plurality of rotating shielding plates 11 at the upper portion.
In the illustrated example, the regulation plate 11a that regulates the rotation of the wide blade 13 of the rotation shield plate 11 at one end (left end in the figure) of the upper surface and the rotation shield plate that abuts at the other end (right end in the figure). A regulation plate 11b for restricting the rotation of the narrow blade 14 of 11 is provided, and the rotation shielding plate 11 can rotate only in one direction (counterclockwise in the figure) when the pressure rises such as an explosion.

The rotation shielding plate 11 is provided with a pair of wings 13 and 14 on the rotation shaft 12 at the upper part of the radiation port 16 (see FIG. 5), and is as shown in FIG. 2 due to the wind pressure that rises when the pressure rises such as an explosion. The wings 13 and 14 rotate and are displaced substantially vertically.
After the explosion pressure is no longer applied, a structure is used in which the wings are rotationally displaced and closed substantially horizontally by the weight 15 provided on the rotary shielding plate 11.
As a result, by rotating a pair of wings, an opening that can be dissipated without hindering the pressure when the pressure rises such as an explosion and a mechanism that shields the opening after the pressure is dissipated are usually used.

As shown in FIG. 1, the explosion emission port structure has a constant temperature bath 1 at the bottom, and heat insulating layers 2A and 2B are formed on the left and right so as to surround the constant temperature bath 1.
A bottom plate 3 is formed on the bottom surface of the constant temperature bath 1, and an upper lid plate 4 is formed on the upper surface.
The space 5 in the middle stage above the constant temperature bath 1 is covered on the left and right sides with the emission port covers 6A and 6B, and the shaft 7 is provided in the center.
The upper part of the space 5 is covered with a ceiling net 8.
The space 9 above the ceiling net 8 is surrounded on the left and right sides by the shielding portion covers 10A and 10B, and the upper surface of the radiation port is closed by a plurality of rotating shielding plates 11 at the upper portion.

The rotation shielding plate 11 is provided with a pair of wings extending at intervals of approximately 180 degrees around the rotation shaft 12, one wide wing 13 extending long and heavy, and the other narrow wing 14 extending short and light. ing.
A weight 15 is attached to the rotating shaft 12 on the narrow wing 14 side so that the wide wing 13 and the narrow wing 14 can be balanced around the rotating shaft 12.

As a result, at the shielding position, the wide wing 13 and the narrow wing 14 urged by the weight 15 are in a substantially horizontal posture to close the emission port.
Further, at the time of dissipation, the wide wing 15 rotates substantially vertically due to the force caused by the explosion in the tank, and the narrow wing 14 is displaced downward.
After that, when the pressure increase subsides, the urging force of the weight 15 allows the wide blade 13 and the narrow blade 14 to return to a substantially horizontal posture and close the emission port.

Since it has the above configuration, the rotary shielding plate 11 has a wide blade 13 and a narrow blade 14 urged by a wide blade 13 and a weight 15 with the rotation shaft 12 in the middle during normal temperature / humidity control. It is well-balanced and closed almost horizontally to maintain airtightness (see Fig. 1).
When the pressure rises due to a gas explosion or the like, the wide blades 13 and the narrow blades 14 can rotate in an upright posture to dissipate the pressure against the urging force of the weight 15 (see FIG. 2).
When the explosive pressure is no longer applied after opening, the wide wings 13 and the narrow wings 14 rotate again in the horizontal posture due to the returning force of the weight 15, and the exhaust port is closed to prevent the inflow of outside air. (See Fig. 3).

The shielding by the wings 13 and 14 is not completely sealed, but in the case of a secondary battery, for example, if it is continuously burned inside, carbon monoxide and flammable gas are generated, so it is filled with those atmospheres. Since the amount of air is reduced compared to the open state, it becomes difficult to reach the lower limit of pressure rise such as an explosion.

In addition, by introducing an inert gas such as N2 or C02 as a measure to prevent the inflow of outside air with the shielding plate 11, the oxygen concentration inside is reduced and the pressure rise such as combustion and explosion is suppressed. Be done.
In addition, during thermal runaway of a secondary battery, a pyrolysis reaction continues to occur even after a pressure rise such as an explosion, so that flammable gas may be generated and the gas may ignite and burn. Therefore, there is also an aim to prevent the emission of flame from the open explosion emission port 16.

"Drop prevention handle structure"
As the lock structure of the door D, a one-touch lock type lever that securely closes the chamber by turning the lever of the handle 90 degrees is used.
It is necessary to take measures to prevent the lever of the handle from falling off when the pressure rises such as an explosion.

As shown in FIGS. 6 to 8, the fall-out prevention handle structure 20 includes a rotary handle 21, a screw portion 23 for tightening and fixing, and a shaft shaft portion 24 that falls in the direction opposite to the door rotation direction when the handle is opened and closed. A plate portion 25 having a collar portion 23 for holding the shaft shaft portion 24 and a groove 26 slightly larger than the diameter of the shaft shaft 24 for fixing the handle 21 and the screw portion 23 on the door D side of the environmental tester. And a base metal fitting portion 28 for pivotally mounting the shaft shaft portion 24 and ensuring the strength of the door D with the main body.

Then, in the plate portion 25 for fixing the handle 21 and the shaft shaft portion 24, a retaining mechanism portion 27 is provided at the tip of the plate portion 25 when the handle 21 slips and escapes.
As a result, even if the handle 21 slips, the handle 21 does not fall off and the door D can be held.

As for the retaining mechanism portion 27 at the tip, in this embodiment, one that can secure the strength cut by an integral type is used, but even if a pin-shaped one that is screwed or welded to the plate portion 25 is used. Often, with respect to the threaded portion, it is preferable to apply square screw processing to the collar on the receiving side to prevent the collar from slipping.

Door packing for environmental tester In the environmental tester, packing 30 made of rubber, elastomer, etc. is used to maintain the sealing property of the door D and improve the airtightness in order to maintain the temperature and humidity in the tank (FIG. 9). reference).

When a pressure rise such as an explosion occurs in the environmental tester, the door D is displaced in the direction of escaping to the outside depending on the strength of the door D, but when the packing 30 is displaced more than the shrinkage white, the packing 30 is also displaced. If it is flexible and soft and does not have enough holding power to suppress the internal pressure, the airtightness inside the tank will decrease, and the flame due to the pressure rise such as an explosion generated inside may be emitted from around the door. Conceivable.

If the permissible displacement amount is within the shrinkage white of the packing 30, the airtightness is maintained, so that the emission of flames and the like is suppressed.
Therefore, a metal frame 31 is provided on the outer periphery of the back surface of the door D where the packing 30 hits, and in the illustrated example, an aluminum frame 31 is provided.

Thereby, when the packing 30 tries to open from the inside to the outside by the explosive pressure, the airtightness can be maintained even in the side surface direction other than the back wall surface of the door D.
The present invention is not limited to the above examples, and of course, various modifications can be made without changing the gist of the present invention.

1 Constant temperature bath 2A, 2B Insulation layer 3 Bottom plate 4 Top lid plate 5 Middle space 6A, 6B Dispersion port cover 7 Regulatory bar 8 Ceiling net 9 Upper space 10A, 10B Shielding cover 11 Rotating Shielding plate 12 Rotating shaft 13 Wide wing 14 Narrow wing 15 Weight 16 Dissipation port 20 Handle structure 21 Handle 23 Screw part 24 Shaft shaft part 25 Plate part 26 Groove 27 Retaining mechanism part 28 Base metal part 29 Pit shaft 30 Packing 31 Metal frame

Claims (3)

A handle is provided on the door of the environmental tester so that it will not fall off when the pressure rises, and a pair of wings of different weights or lengths are placed on the upper part of the explosion emission port provided in the constant temperature bath so as to be substantially opposite to the rotation axis. The emission port is closed with a rotating shield plate provided with a weight or an urging means so that the pair of wings are balanced.
When the pressure does not rise, a pair of wings close the emission port, when the pressure rises, the pair of wings rotate to open the emission port, and after the pressure rises, the pair of wings close the emission port with the weight or urging means. Reinforced structure of the environmental tester, which is characterized by returning to. The handle has a rotary handle, a screw part for tightening and fixing, a shaft shaft part that falls in the direction opposite to the door rotation direction when the handle is opened and closed, and a shaft for fixing the handle and the screw part on the door side of the environmental tester. A plate portion having a groove slightly larger than the diameter of the shaft, a groove portion through which the shaft portion is passed, a shaft retaining mechanism portion formed on the tip end side of the groove portion, and a base end of the shaft shaft portion are pivoted. The reinforcing structure for an environmental tester according to claim 1, wherein the door is formed of a base metal fitting portion that is worn and secures strength with the main body of the door. The reinforcing structure for an environmental tester according to claim 1 or 2, wherein a metal frame is formed on the outer periphery of a tank in which packings provided on the back surface of a door provided with a handle collide with each other.

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