JP4335991B2 - Gas supply device for inspection - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inspection gas supply device used when performing operation check by supplying an inspection gas to the gas detection device or the like when maintaining the gas detection device or the like. The present invention relates to a technology for supplying inspection gas used for inspection of equipment that has been used.
[0002]
[Prior art]
Conventionally, when inspecting a gas detection device or the like, the detection gas to be detected is blown or sucked, and the detection gas of a predetermined concentration is forcibly used as the inspection gas in the gas detection device. It is possible to confirm whether the gas detection device exhibits normal output, responsiveness, etc. corresponding to the gas to be detected having the predetermined concentration by measuring the output, responsiveness, etc. Has been done. In such a case, the gas to be detected having the predetermined concentration is
<1> Use what was collected from a gas stove at the inspection site.
<2> Adjust the concentration of the gas to be detected carried by a gas cylinder etc. at the inspection site.
<3> Use one generated from a substitute for the gas to be detected.
It is supplied by.
[0003]
[Problems to be solved by the invention]
But according to this method,
In the method <1>, the amount of gas collected is limited and it is difficult to adjust the concentration accurately. Therefore, it is difficult to adjust the concentration to a gas with a small gas leak alarm for home use and a relatively low toxicity level. Can only be applied to gas detectors,
In addition, in order to adopt the method <2>, in order to adjust the gas concentration to be detected at the inspection site, in addition to this, various devices for gas sampling, mixing, and concentration setting must be used in combination. There is a problem that it becomes complicated and imposes a great deal of labor on the inspecting worker, and the workability is low.
Therefore, it is considered that sublimable solid substances such as camphor and naphthalene are used as substitutes for inspection gas, and it is considered to obtain inspection gas by the method <3>. However, since the main component is different from the gas to be detected, the correlation between the gas detection characteristics does not always match between the substitute and the gas to be detected. It is necessary to know the correlation of characteristics with respect to the above in advance, and in order to perform accurate inspection work, complicated work for calibration and the like has to be performed.
[0004]
Accordingly, an object of the present invention is to provide an inspection gas supply device that allows an operator to easily supply an inspection gas in view of the above-described situation.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the characteristic configuration of the present invention is:
An inspection gas supply container is provided, which includes an occlusion agent storage space for storing an inspection gas storage agent capable of adsorbing and desorbing the inspection gas, and an inspection gas adjustment space for storing the inspection gas. A hole for maintaining the pressure in the inspection gas supply container at atmospheric pressure is provided in the supply container, and the hole is provided separately from the hole. There the inspection gas is adjusted based on the intake desorption equilibrium under, in that is formed with a takeout gas inspection retrieving to the inspection gas supply vessel outside the gas suction,
More preferably, the inspection gas outlet has a dilution mechanism for diluting the inspection gas taken out from the inspection gas outlet,
The dilution mechanism is constituted by a tubular body including a connection portion connectable to the inspection gas outlet, a discharge portion connectable to the gas discharge mechanism, and an inlet capable of taking in the dilution gas, It is preferable that the inspection gas sucked from the connection portion and the dilution gas sucked from the intake port are formed so as to be freely mixed by the inspection gas discharge from the discharge portion,
The inner diameters of the hole, the inspection gas outlet and the inlet are 1 mm, 4 mm and 2.5 mm, respectively, and the volume ratio of the storage agent storage space to the inspection gas adjustment space is the storage agent storage. Space: Gas adjustment space for inspection = 17: 25 is more preferable.
[0006]
[Function and effect]
In other words, an inspection gas supply container is provided, and a storage gas storage space for storing the inspection gas storage agent capable of absorbing and desorbing the inspection gas is provided, and an inspection gas adjustment space for storing the inspection gas. In the state where the inspection gas is adsorbed to the inspection gas storage agent, the inspection gas storage agent is accommodated in the storage space for storing the inspection gas in the inspection gas supply container. Can be accommodated. Moreover, since the inspection gas supply container is provided with an inspection gas adjustment space in addition to the storage space for the storage agent, if the inspection gas adsorbed on the inspection gas storage agent is left as it is, the storage gas is stored. to keep the intake desorption equilibrium for agents, spreading the inspection gas adjusting space to desorb from the inspection gas absorbent and retention. Here, since the hole for maintaining the pressure in the inspection gas supply container at atmospheric pressure is provided in the inspection gas supply container, at the same time as the inspection gas stays, the inspection gas adjustment space An adsorption / desorption equilibrium between the solid phase and the gas phase is established between the inspection gas and the inspection gas storage agent under atmospheric pressure conditions. Therefore, the said absorbing agent accommodating space, based on the intake desorption equilibrium, inspection gas is adjusted to a predetermined concentration is obtained.
Then, for checking wherein the inspection gas supply vessel, the occluding agent accommodating space and the inspection gas conditioning space, the inspection gas is adjusted based on the intake desorption equilibrium under atmospheric conditions, taken by gas suction Since the gas outlet is formed separately from the hole, the inspection gas adjusted to a predetermined concentration based on the adsorption / desorption equilibrium under atmospheric pressure conditions can be used for inspection of the equipment.
[0007]
By the way, in many cases, the inspection gas that is adjusted only by the adsorption / desorption equilibrium is too high in concentration for use in inspection of the gas detection element. In such a case, if a dilution mechanism for diluting the inspection gas taken out from the inspection gas outlet is provided at the inspection gas outlet, the inspection gas taken out from the inspection gas outlet is provided. The gas can be set to a concentration that is appropriately diluted for use in inspection, and the inspection gas can be adjusted to an appropriate concentration for easy handling.
[0008]
The dilution mechanism is configured by a tubular body including a connection portion that can be connected to the inspection gas outlet, a discharge portion that can be connected to the gas discharge mechanism, and an inlet that can take in the dilution gas. the inspections gas discharged from the discharge portion, when there forms mixed freely form the diluent gas to be sucked from the inlet the and inspection gas sucked from the connection part, be a simple structure However, the dilution degree of the inspection gas can be easily set by adjusting the opening degree of the connection part, the discharge part, the intake port, and the inspection gas discharge speed by the gas discharge mechanism such as a gas suction machine. Specifically, the inner diameters of the hole, the inspection gas outlet, and the inlet are 1 mm, 4 mm, and 2.5 mm, respectively, and the volume ratio of the storage agent storage space to the inspection gas adjustment space is the storage agent storage. If the space: inspection gas adjustment space = 17: 25, the inspection gas adjusted to an appropriate concentration can be supplied.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the inspection gas supply apparatus of the present invention includes an occlusion agent storage space 2 for storing activated carbon as an inspection gas storage agent 1 capable of adsorbing and desorbing butane gas as an inspection gas, and the inspection gas. An inspection gas supply container 4 having an inspection gas adjustment space 3 for housing the inspection gas is provided, and the inspection gas adsorbed by the inspection gas storage agent 1 in the inspection gas supply container 4 is the inspection gas. A hole serving as a diffusion dilution limiting portion 5 for limiting diffusion outside the supply container 4 and an inspection gas outlet 6 for taking the adjusted inspection gas out of the inspection gas supply container 4 are formed. is there.
In addition, a connecting portion 11 connected to the inspection gas outlet 6 is provided, an inlet 12 capable of taking in a dilution gas is provided, and a discharge portion 13 capable of discharging inspection gas is provided as an inspection target as a gas discharge mechanism. A tubular body 14 having an intake port 12 that can be connected to a suction port 23 of a gas suction device 22 provided in the gas detection device 21 and that can take in a dilution gas is provided. The tubular body 14 in which the inspection gas sucked from the connection portion 11 and the dilution gas sucked from the intake port 12 are formed by gas discharge so as to be freely mixed is used for the inspection of the inspection gas supply device. A dilution mechanism is provided which is detachably provided at the gas outlet 6 and dilutes the inspection gas taken out from the inspection gas outlet 6. Further, the connecting portion 11 is filled with a filler 15 such as glass wool, and the opening degree of the inspection gas outlet 6 is limited to be small.
[0010]
As shown in FIG. 2, such an inspection gas supply device is connected to a gas suction path of the gas detection device and receives gas suction by the gas suction device. When the gas is sucked from the discharge unit 13, the check gas is sucked from the check gas adjustment space 3, and the check gas is discharged through the discharge unit 13. At this time, since air flows in simultaneously from the intake 12, the butane gas concentration in the inspection gas adjustment space 3 can be changed from the discharge unit 13 by appropriately setting the opening degree of the intake 12. It can be diluted to an appropriate concentration at the stage of ejection.
Specifically, the diffusion dilution limiting hole 5 is φ1, the inspection gas outlet hole 6 is φ4, the ratio of the storage material accommodation space to the inspection gas adjustment space is 17:25, and the inlet is φ2 .5, the inspection gas adjusted to an appropriate concentration can be supplied to the gas detection device when the inspection gas adjusted by the gas suction of 250 to 450 ml / min is taken out. I understood.
[0011]
[Another embodiment]
Another embodiment will be described below.
In the previous embodiment, butane gas was used as the inspection gas. However, the present invention is not limited to this, and a gas corresponding to a gas detection device or the like to be inspected may be used. Further, the inspection gas storage agent 1 for storing such a gas is not limited to activated carbon, and may be zeolite or the like, which allows both inspection gas to be adsorbed and desorbed, and adsorbs the inspection gas. Any material that exists stably in a state can be used.
[0012]
Further, the shape of the inspection gas supply container is not limited to the above-described one, and various shapes corresponding to the device to be inspected can be adopted. The tubular body 14 may be provided integrally with the inspection gas supply container instead of being detachably provided. Moreover, when the function applicable to the said inlet 12 or the said connection part 11 is provided in the apparatus of inspection object, even if it does not have the said tubular body, it functions.
In a state where the tubular body is connected to the inspection gas supply container, the internal space of the tubular body can also function as the inspection gas adjustment space.
Furthermore, the suction device provided in the inspection target device is used in the configuration in which the inspection gas is discharged from the discharge unit 13. However, instead of this, a separate suction device may be provided. A blowing device for injecting the dilution gas may be provided.
Further, the diffusion dilution limiting portion 5 can also be used as the inspection gas outlet 6. In such a case, the hole serving as the inspection gas outlet 6 is not normally used at the time of inspection. Maintaining the open state at the time of inspection) can act as the diffusion dilution limiting hole 5, thereby simplifying the structure, facilitating manufacturing, and contributing to cost reduction.
Further, in such a case, the inspection gas supply container 4 includes the inspection gas outlet 6, a discharge portion 13 that can be connected to a gas discharge mechanism, and an intake 12 that can receive a dilution gas. The inspection gas discharged from the discharge portion 13 is integrally formed, and the inspection gas sucked from the connection portion 11 and the dilution gas sucked from the intake port 12 are formed so as to be freely mixed. By providing a lid-like body that can be connected to the gas supply container 4, a more simplified structure can be realized, which is advantageous (see FIG. 3). Further, when the integrated structure is adopted, the degree of freedom of the setting direction of the opening of the discharge unit 13 is increased and it is easy to adapt to the device to be inspected (see FIG. 4).
Further, with respect to the structure in which the gas detection device is connected to the discharge unit 13, the discharge unit 13 may be fitted into the gas suction port 23 of the gas detection device or may be fitted outside. Form may be sufficient. Further, in the previous embodiment, glass wool was used to adjust the opening degree of the inspection gas extraction hole 6 in the dilution mechanism. However, when the above-described integrated structure is adopted, the connection of the tubular body 14 is performed. By forming the part corresponding to the part 11 in the form of an orifice, it is possible to adopt a configuration in which the diffusion dilution limiting part 5, the inspection gas outlet 6 and the connection part 11 can be used together.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of an inspection gas supply apparatus. FIG. 2 is an explanatory view showing a use state of the inspection gas supply apparatus. FIG. 3 is an explanatory view showing different forms of the inspection gas supply apparatus. Explanatory drawing showing different forms of industrial gas supply device
DESCRIPTION OF SYMBOLS 1 Gas storage agent for inspection 2 Storage space for storage agent 3 Gas adjustment space for inspection 4 Gas supply container for inspection 5 Diffusion dilution limiting part 6 Gas outlet for inspection 11 Connection part 12 Inlet 13 Discharge part 14 Tubular body 15 Filler 21 Gas detection device 22 Gas suction device 23 Suction port

Claims (4)

An inspection gas supply container is provided, which includes a storage agent storage space for storing an inspection gas storage agent capable of absorbing and desorbing the inspection gas, and an inspection gas adjustment space for storing the inspection gas,
A hole for maintaining the pressure in the inspection gas supply container at atmospheric pressure in the inspection gas supply container;
Provided separately from the said hole in said occluding agent accommodating space and the inspection gas regulation space, the inspection gas is adjusted based on the intake desorption equilibrium under atmospheric conditions, for the inspection by the gas suction A gas supply device for inspection, which has a gas outlet for inspection to be taken out of the gas supply container.   The inspection gas supply device according to claim 1, wherein a dilution mechanism for diluting the inspection gas taken out from the inspection gas outlet is provided at the inspection gas outlet. The dilution mechanism is composed of a tubular body provided with a connection portion that can be connected to the inspection gas outlet, a discharge portion that can be connected to a gas discharge mechanism, and an inlet that can take in the dilution gas.
The inspection gas supply according to claim 2, wherein the inspection gas sucked from the connection portion and the dilution gas sucked from the intake port are formed so as to be freely mixed by discharging the inspection gas from the discharge portion. apparatus. The inner diameters of the hole, the inspection gas outlet and the inlet are 1 mm, 4 mm and 2.5 mm, respectively.
4. The inspection gas supply device according to claim 3, wherein a volume ratio between the storage agent storage space and the inspection gas adjustment space is storage agent storage space: inspection gas adjustment space = 17: 25.

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