JPH06265442A - Side sealing mechanism of on-off door in housing for sample transpired gas collection - Google Patents

Abstract

PURPOSE:To provide a side sealing mechanism of an on-off door in a sample transpired gas collecting housing, capable of sealing the on-off door easily and accurately even if a temperature in this collecting housing is varied by a specified mode pattern. CONSTITUTION:This side sealing mechanism is installed in a sample transpired gas collecting housing 2 made up of being rigid in structure and hermetically sealable in order to collect the transpired gas as a sample after an automobile stored, and it is provided with a packing keeping holder H installed on both sealing surfaces 2a and 3a between the housing 2 and the door 3 extending over the whole circumference of this on-off door 3, and a packing unit 4 being attached to this holder H expandably and making any possible leak of the sample transpired gas preventable through both these sealing surfaces 2a and 3a, and a packing expansion means expanding or contracting this packing 4, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side seal mechanism for an opening / closing door in a sample vaporization gas collection housing, and more particularly to a vaporization gas measurement for measuring vaporization gases such as hydrocarbons vaporized from automobiles and fuels thereof. In the test, a packing of an opening / closing door for storing an automobile equipped in a housing for collecting a sample vaporized gas (hereinafter, simply referred to as SHED) which is configured to be rigidly sealed so as to collect the vaporized gas as a sample in a vehicle is tested. It is about structure.

[0002]

2. Description of the Related Art For example, in the measurement of hydrocarbons evaporating from the body of an automobile or its fuel, the automobile is housed in a hermetically sealed SHED for the required time,
It is performed by collecting the evaporated gas as a sample. And S
Collection of the vaporized gas in the HED is performed by determining the initial volume value of the SHED and changing the temperature in the SHED in a predetermined mode pattern. During this time, the pressure inside the SHED is defined as the pressure outside the SHED. It is necessary to equalize within. Further, the SHED and the opening / closing door 21 are composed of a heat insulating panel, and as shown in FIG. 4, the SHED 22 and the opening / closing door 21 are used to seal the opening / closing door 21 in a state in which the opening / closing door 21 is closed in the evaporation gas measurement test. Joining surfaces 22a, 21 of
A rubber packing 23 is provided on the joint surface 22a of the SHED 22 so as to come into close contact with the joint surface 21a of the opening / closing door 21 over a.

[0003]

However, as described above, the temperature cycle in the SHED is lower (18.3).
When the temperature shifts from (° C) to the higher (40.6 ° C) and vice versa, from the higher (40.6 ° C) to the lower (18.3 ° C), due to the change in the temperature pattern, the SHED
22 and the opening / closing door 21 are deformed due to temperature fluctuations.
That is, the two heat insulating panels 21 and 22 are warped, and the warp may cause leakage of the sample evaporated gas through the joint surfaces 21a and 22a. The warp of the heat insulating panel becomes particularly remarkable as the temperature changes greatly. Since it is necessary to change the temperature in the transpiration gas measurement test, even if the temperature changes rapidly, it is possible to promptly cope with it, and the opening / closing door 21 can be easily and surely sealed.
It is desired that reliable test conditions can be realized.

The present invention has been made in view of the above problems, and an object thereof is to easily and reliably seal the opening / closing door even when the temperature inside the SHED is changed in a predetermined mode pattern. It is an object of the present invention to provide a side seal mechanism for an opening / closing door in a housing for collecting sample evaporated gas.

[0005]

Means and Actions for Solving the Problems
In a transpiration gas measurement test that measures transpiration gas such as hydrocarbons evaporating from an automobile or its fuel,
In a side seal mechanism of an opening / closing door equipped in a housing for collecting sample evaporation gas that is configured to be rigidly sealed so as to collect the evaporated gas as a sample in an automobile, a housing for collecting sample evaporation gas and an opening / closing door On the joint surface, a packing holding holder provided around the entire circumference of the open / close door, a packing that is extendably attached to the holder and that can prevent leakage of sample evaporated gas, and a packing expansion / contraction means that can expand / contract the packing. It is a side seal mechanism of an opening / closing door in the housing for evaporating sample gas provided.

That is, according to the present invention, an expandable / contractible packing is provided all around the opening / closing door, and when the opening / closing door is closed, the packing is expanded / contracted so as to be sandwiched between the joint surface of the opening / closing door and the sample evaporated gas collection housing. When the evaporation gas measurement test is performed, the packing can be expanded and contracted due to the change in volume even when the sample evaporation gas collection housing and the opening / closing door are deformed during the evaporation gas measurement test. In contrast to the conventional seal, the expansion and contraction of the packing can compensate for the displacement of the joint surface so that the packing seals the joint surface, and the packing can be always sandwiched between the joint surfaces.

As the packing in the present invention, the material is not particularly limited as long as it is expandable and contractable and can prevent the leakage of the sample evaporated gas through the joint surface between the sample evaporated gas collecting housing and the opening / closing door. Absent. For example, rubber packing can be used frequently.

In the present invention, the joint surface between the sample evaporated gas collecting housing and the opening / closing door means a surface for sandwiching the packing. For example, as shown in FIG. 1, the entire peripheral surface 3a of the opening / closing door 3, When the opening / closing door 3 is closed, it means the facing surface 2a of the sample evaporation gas collection housing 2 that faces the entire peripheral surface 3a of the opening / closing door 3. During the evaporation gas measurement test, the packing 4 held by the holder H expands and contracts in accordance with the temperature change in the sample evaporation gas collection housing 2, and is always in close contact with the facing surface 2a so that the packing 4 joins the bonding surface 2a. , 3
It is possible to prevent leakage of the sample evaporated gas through a.

[0009]

EXAMPLES Examples will be described below. However, the present invention is not limited thereby. Figure 1
In FIG. 3, a sample evaporation gas collection housing (hereinafter,
The side-seal mechanism of the open / close door in (simply referred to as SHED) houses the automobile 1 and collects the vaporized gas as a sample in the vaporized gas measurement test for measuring the vaporized gas such as hydrocarbon vaporized from the automobile 1 and its fuel. SHED that can be hermetically sealed with a heat insulating panel
2 is provided on the joint surface 2a, 3a of the SHED 2 and the opening / closing door 3 and a packing holding holder H provided over the entire circumference of the opening / closing door 3 and a joint surface attached to the holder so as to be extendable and contractible. SHED2 through 2a and 3a
It mainly includes a packing 4 capable of preventing leakage of the sample evaporated gas therein, and a packing expanding / contracting means capable of expanding / contracting the packing 4 and thereby always holding the packing 4 between the joint surfaces 2a and 3a.

Further, the packing 4 is composed of a tubular packing main body 5 having a substantially U-shaped cross section, and a hollow portion 6 for expanding and contracting the packing main body 5 due to the volume change by the packing expansion / contraction means. In this embodiment, the expansion and contraction of the packing body 5 changes the volume due to intake or discharge of air into the hollow portion 6, and the central tip end surface of the packing body 5 is opened and closed with a sealable area. Securely seal the door 3.

The packing expanding / contracting means is composed of a control valve V comprising an air suction valve for sucking air into the hollow portion 6 and an air discharge valve for discharging air from the hollow portion 6 (FIG. 3). Further, in this embodiment, the SHED
A lamp (abnormality reporting means) (not shown) for reporting an abnormality in the atmospheric pressure (SHED internal pressure) in 2 and a pressure gauge (seal) for outputting a pressure relief signal for operating the air discharge valve of the packing expansion / contraction means V at the time of this abnormality. Automatic release means) P. The pressure gauge P is composed of a differential pressure gauge for detecting a difference between the atmospheric pressure and the SHED internal pressure. That is, in FIG.
Only when the internal pressure rises or falls due to some trouble and the difference between the atmospheric pressure and the SHED internal pressure exceeds the pressure limit set by the pressure gauge P, a pressure relief signal for operating the air exhaust valve is output to automatically release the seal. And thereby SH
It is possible to prevent failure and damage due to the pressure resistance limit of the ED 2 and the heat insulation panel of the opening / closing door 3. During the automatic release of the sticker, the lamp is always on. While the lamp is on, air is evacuated from the hollow portion 6 of the packing 4 through the air discharge passage E, so that the seal by the open / close door 3 is automatically released, and the abnormal pressure in the SHED 2 is depressurized. . After that, if the lamp goes out, the pressure gauge P
Detects the inside of the pressure limit, so the packing 4
The air pressure of the hollow portion 6 so as to be sandwiched between the joint surfaces 2a and 3a with D2 can be automatically restored by the air introduced into the hollow portion 6 from the pressurized air flow path L again by the packing expansion / contraction means.

In FIG. 3, the outer diameter of the SHED2 enclosure is about 6.5 m (W) × 3.
It is 1 m (D) x 2.6 m (H). And S
The inside of the HED 2 is air-conditioned from above the automobile 1 by the air conditioner 7, and the heat exchanger 8 operates at 18.3 ° C to 40.6 ° C to 1 ° C.
The temperature cycle is set to 8.3 ° C. This SHED2
To control the internal temperature, install a hot water tank and a cold water tank,
This is performed by separating the warm heat pipe 9 and the cold water pipe 10 in the heat exchanger 8, and is performed by controlling the flow rates of these pipes 9 and 10.

In the upper part of the SHED2, the SHED
There is provided a pressure absorption bag 11 that adjusts the volume of the SHED 2 by changing the volume of the SHED 2 by spontaneously sucking or naturally discharging air according to the atmospheric pressure in 2.
The pressure absorbing bag 11 is made of vinyl fluoride resin or the like and is deformable in the shape of a bag, and has a communication port 12 with an air inflow / outflow means (not shown) provided outside the SHED 2 for inflowing / outflowing air. Connected through. Code 13
Is an exhaust duct.

Since this embodiment has the above-mentioned structure, the expandable packing 4 is provided over the entire circumference of the open / close door 3, so that the packing 4 is joined to the SHED 2 at the joint surfaces 2a and 3a.
The air pressure of the hollow part 6 is preset by the packing expansion / contraction means so as to be sandwiched between a and SHE during the evaporation gas measurement test.
The load due to the pressure fluctuation is applied to the SHED 2 and the opening / closing door 3 due to the temperature change in the D 2 and the SHED 2 and the opening / closing door 3
Even if a surface warp occurs in the heat insulating panel, the air is sucked into the hollow portion 6 or the hollow portion 6 depending on the pressure fluctuation due to the temperature change.
The packing body 5 expands and contracts due to the volume change caused by discharging from the
The expansion and contraction of the packing body 5 compensates for the displacement of the joint surfaces 2a and 3a due to the warp of the heat insulating panel, and the packing body 5 can follow the displacement of the joint surfaces 2a and 3a.
Can be always sandwiched between the joint surfaces 2a and 3a, and the opening / closing door 3 can be reliably sealed.

[0015]

As described above, according to the present invention, the expandable packing is provided over the entire circumference of the opening / closing door, and when the opening / closing door is closed, the packing is a joint surface between the opening / closing door and the sample evaporation gas collecting housing. Initially set by packing expansion and contraction means so that it will be sandwiched between the sample evaporation gas measurement housing and the sample evaporation gas collection housing due to temperature changes during the evaporation gas measurement test. Unlike conventional seals, the expansion and contraction of the packing compensates for the deviation of the joint surface so that the packing seals the joint surface, and the packing can always be sandwiched between the joint surfaces. . As a result, there is an effect that even if the temperature inside the sample vaporization gas collection housing changes suddenly, it can be promptly dealt with, and the opening / closing door can be easily and surely sealed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a main part configuration showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a configuration in the above embodiment.

FIG. 3 is an explanatory diagram of the overall configuration of the above embodiment.

FIG. 4 is an explanatory diagram of a main part configuration showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automotive, 2 ... SHED (housing for sample evaporation gas collection), 2a, 3a ... Joining surface, 3 ... Opening / closing door, 4 ... Packing, 5 ... Packing main body, 6 ... Hollow part, V ... Control valve (packing expansion / contraction means) ), H ... Holder for holding packing.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yama ▲ saki ▼ Kazumi 1-4-1 Chuo, Wako-shi, Saitama, Ltd. Honda R & D Co., Ltd. (72) Inventor Kiyoshi Sakata 1-4 Chuo, Wako-shi, Saitama No. 1 HONDA R & D Laboratories, Inc. (72) Hideki Ohashi Inventor Hideki Ohashi 2 Higashimachi, Kichijoin Miya, Minami-ku, Kyoto-shi, Kyoto (72) Inventor Tamotsu Iwai 2-chome, Hanazono Higashimachi, Higashi-Osaka, Osaka 8th-15th Soda Industry Co., Ltd.

Claims (4)

[Claims] 1. In a transpiration gas measurement test for measuring transpiration gas such as hydrocarbon evaporating from an automobile or its fuel, the automobile is housed and configured to be hermetically sealed so as to collect the transpiration gas as a sample. In the side-seal mechanism of the open / close door installed in the sample vaporized gas collection housing, the packing holding holder is provided on the joint surface of the sample vaporized gas collection housing and the open / close door over the entire circumference of the open / close door, and this holder. A side seal mechanism for an opening / closing door in a sample vaporized gas collecting housing, which includes a packing that is extendably attached to the sample and can prevent leakage of the sample vaporized gas, and a packing expansion / contraction means that can expand and contract the packing. 2. The packing comprises a tubular packing main body having a substantially U-shaped cross section, and a hollow portion for expanding and contracting the packing main body due to a volume change by the packing expansion / contraction means.
A side-seal mechanism for an opening / closing door in the sample vaporization gas collection housing described in. 3. The packing expansion / contraction means comprises a control valve including an air suction valve for sucking air into the hollow portion and an air discharge valve for discharging air from the hollow portion. Item 3. A side seal mechanism for an opening / closing door in the sample evaporated gas collection housing according to Item 2. 4. An abnormality reporting means for reporting an abnormality in the atmospheric pressure in the sample evaporated gas collecting housing, and an automatic seal releasing means for outputting a pressure relief signal for operating the air discharge valve of the packing expansion / contraction means when the abnormality occurs. A side seal mechanism for an opening / closing door in the sample evaporated gas collection housing according to claim 3.