JPH021664Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an inspection device for a gas leak alarm.

Conventionally, as this type of inspection device, for example,
-No. 97985 (filed on July 14, 1980: Utility Industry Opening in 1982)
No. 24684). In this conventional example, at least the gas vent and inspection port areas of the gas leak alarm are covered by a cover member, and in this state, inspection gas is blown from the container through the tube to the inspection port of the alarm.

Therefore, gas leak alarms are inspected to confirm whether the alarm point is normally within the standard range, but this check is done based on the standards that indicate the upper and lower limits of the gas alarm concentration. This is done by using the upper limit concentration gas and lower limit concentration gas and checking that the gas leak alarm will issue an alarm for the former gas but not for the latter gas.

For this reason, in the conventional example described above, when inspecting a gas leak alarm, two inspection gas containers filled with standard gas (inspection gas) of upper limit concentration gas and lower limit concentration gas are used instead of gas supplied at the site. had to be prepared in advance, and these inspection gas containers had to be replaced. Moreover, in this conventional example, the cover member that covers at least the gas vent and inspection port of the gas leak alarm is made in a size that is compatible only with alarms of the same type, so It cannot be used for alarms, and therefore it is necessary to prepare and replace special covering members for each type.

The present invention has been made to solve these conventional problems. According to the present invention, the inspection gas is supplied from the container to the cover member that seals and covers the gas leak alarm by means of a supply means consisting of a metering pump whose pumping time can be adjusted or a syringe whose piston displacement can be adjusted. By changing the pumping time of the metering pump or by changing the amount of piston thrust of the syringe, the concentration of the inspection gas in the cover member can be set to a constant concentration of the upper or lower limit of the gas leak alarm. As a result, on-site supply gas can be collected from the tank and used as inspection gas, and there is no need to replace inspection gas containers. Further, according to the present invention, the cover member is made quite large enough to cover not only the same type but also most of other types of gas leak alarms of different sizes.
There is no need to replace the cover member for each type. In this case, even if the cover member covers the alarm, a large internal space remains, so it is preferable to provide a fan inside the cover member and use this fan to diffuse the inspection gas and make its concentration uniform. .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention as an inspection device for a city gas leak alarm will be described in detail below with reference to the drawings.

In Figures 1 and 2, the cover member 1, made for example from transparent plastic, has a large internal volume and is able to cover not only the same type but also most other types of gas leak alarms on the market. It's getting old. A gasket 2 made of rubber or the like is fitted to the upper opening edge of the cover member 1, and this gasket is used to connect a city gas leak alarm 4 installed on the ceiling surface 3 of a home kitchen or the like by means of the cover member 1. When covered, it comes in close contact with the ceiling 3. Further, an inspection gas injection pipe 5 and a small fan 6 are attached to the bottom of the cover member 1 via fittings 7 and 8, respectively, and a fan motor 9 attached to the outside of the cover member 1 has terminals 10a and 10b. have

The upper end of the support arm 11 made of a tube is pressed into a flat plate shape, and this pressed end is attached to the cover member 1.
The two arms 13 of the fixture 12 provided at the center of the bottom of the
It is inserted between a and 13b and fixed with a set screw 14. Therefore, by loosening this set screw, the cover member 1 can swing freely, so that, for example, the gas leak alarm 4 can be attached to the ceiling 3.
Instead, when the alarm is installed high on a wall, the cover member 1 can be turned sideways to cover the alarm.

A guide tube 15 is housed inside the support arm 11, through which a test gas supply tube 16 and a cord 18 containing conductors 17a, 17b pass. The tube 16 and the cord 18 are extracted from the middle of the support arm 11 through bushes 19 and 20 made of rubber or the like, and the upper end of the tube 16 is fitted into the inspection gas injection tube 5 attached to the cover member 1 so as to be freely insertable and detachable.
Further, the conductors 17a and 17b of the cord 18 are connected to the terminal 10 of the fan motor 9 similarly attached to the cover member 1.
a, 10b in a detachable manner.

The support arm 11 also has its lower end screwed onto the central protrusion 22 of the hollow handle 21. This handle is equipped with a remote switch 23 on one side and a switch 24 on the other side.
It is equipped with an inspection gas pipe 25 with an attached gas pipe.
At the inner end of this pipe is the inspection gas supply tube 1.
6 is connected, and the cord 18 from the fan motor 9 and the cord 26 from the remote switch 23 are connected to the handle 2 through the remote cord 27.
being guided outside of 1. remote code 27
is led out from the handle 21 through a bush 28 together with the inspection gas pipe 25.

The remote cord 27 then connects the micro metering pump 2, the electrical circuit of which is shown in FIG.
Terminals 31a to 31c of box 30 containing 9
connected to. In addition to the metering pump 29, the pump box includes a battery 32 consisting of a plurality of dry cells, a power switch 33, and a battery indicator 34. A test gas supply tube 36 connected to the test gas pipe 25 attached to the handle 21 is connected to the discharge port 35 of the metering pump 29, while a test gas container (filled with test gas) is connected to the suction port 37 of the metering pump 29. gas holder)
Thirty-eight end tubes 39 are connected.

Next, a method of handling the gas leak alarm inspection device configured as described above will be explained.

First, this inspection device is separated from the handle 21 to which the support arm 11 is screwed, the pump box 30, and the inspection gas container 38, and is transported to the site where the gas leak alarm 4 to be inspected is installed. Therefore, the remote cord 27 led from the handle 21 and the inspection gas tube 36 are connected to the insertion port (terminals 31a to 31c) of the pump box 30 and the discharge port 35 of the metering pump 29, respectively.

Then, after turning on the power switch 33 of the pump box 30, turn on the remote switch 23,
Check whether the battery 32 is sufficient and the metering pump 29 and fan motor 9 rotate, and then turn off the remote switch 23. The container 38 is also filled with a test gas collected from a gas cylinder or on-site gas supply gas cylinder through its end tube 39, and then the end tube 39 is connected to the suction port 37 of the metering pump 29.

Next, the set screw 14 is loosened and positioned so that the gas leak alarm 4 to be inspected can be completely covered by the cover member 1.
After that, open the gas tank 24 of the pump box 30 in a direction that does not direct the cover member 1 toward the alarm 4, turn on the remote switch 23, and operate the metering pump 29 and fan motor 9.
Thereby, the inspection gas is supplied from the container 38 to the inside of the cover member 1 through its supply passage members, that is, the end tube 39, the supply tube 36, the pipe 25, the supply tube 16, and the injection tube 5, thereby performing gas purging. The time for this gas purge may be about 5 seconds.

After completing the inspection preparation operations described above, the gas leak alarm 4 is completely covered with the cover member 1, and in this state, the remote switch 23 is turned on again to supply inspection gas from the container 38 to the inside (space) of the cover member 1.
Supply and inspect.

In this inspection, the test gas is supplied from the container 38 to the cover member 1 by the metering pump 29, so by appropriately setting the pumping time of this metering pump, the concentration of the test gas in the cover member can be adjusted to the level required for the gas leak alarm. A fixed upper or lower concentration can be achieved and there is no need to replace conventional containers.
In this case, it is preferable to prepare in advance a quick reference table showing how much pumping time it takes for the inspection gas in the cover member to reach the upper and lower concentration limits.

Further, since the fan 6 is rotated by the operation of the motor fan 9 and the inspection gas inside the cover member 1 is diffused, inspection gas of uniform concentration can be supplied to the gas leak alarm 4, and the gas leakage alarm 4 can be provided with a uniform concentration. 2 is in close contact with the ceiling surface, for example, so that inspection gas will not leak.

FIG. 4 shows another embodiment of the present invention, in which a syringe is used as the test gas supply means in place of the above-mentioned metering pump.

In Fig. 4, 1 is a cover member, 2 is a gasket, 5 is an inspection gas injection pipe, 6 is a fan, 8 is a fixture, 9 is a fan motor, 10a and 10b are its terminals, 11 is a support arm, and 12 is a mounting 14 is a set screw, 16 is an inspection gas supply tube, 21 is a handle, 22 is a central protrusion thereof, 23 is a remote switch, 36 is an inspection gas supply tube, 38
1 is a test gas container, and 39 is its end tube, which are similar to those shown in FIGS. 1 and 2.

According to this embodiment, the handle 21
The inspection gas supply tube 36 led out from the tube 42 is connected to one port of the three-way valve 40, and the other two ports of the three-way valve are connected to the end tube 39 of the inspection gas container 38 and the inlet 41a of the syringe 41, respectively. and 43. Further, one terminal 10a of the fan motor 9 attached to the cover member 1 is electrically connected to one terminal of a battery 45 mounted on the bottom of the cover member 1 via a fitting 44 by a cord 46, and the fan motor 9 is A cord 47 connected to the other terminal 10b of the motor 9 and a cord 48 connected to the other terminal of the battery 45 are guided through the inside of the support arm 11 and the handle 21, and are electrically connected to the remote switch 23. When the remote switch 23 is turned on, the fan 6 can be rotated.

Next, to explain its handling, first, switch the three-way valve 40 so that the space between the inspection gas container 38 and the syringe 41 is open, and then
1b to fill the container 41c of the syringe 41 with the inspection gas previously collected in the container 38. Thereafter, the three-way valve 40 is switched so that the gap between the syringe 41 and the inspection gas supply tube 36 is opened, and in this state, the piston 41b of the syringe 41 is opened.
By pushing out the inspection gas in the container 41c, the inspection gas is supplied to the inside of the cover member 1 through the supply passage members, that is, the tubes 36 and 16 and the injection pipe 5, and inspection is performed.

In this inspection, the inspection gas is supplied from the container 41c of the syringe 41 to the cover member 1 by the extrusion of the piston 41b of the syringe 41. The concentration of the inspection gas can be set to a constant concentration at the upper or lower limit of the gas leak alarm, and there is no need to replace the inspection gas container as in the past. In this case, the scale that serves as a guideline for how much the piston must be pushed out to reach the upper and lower concentration limits of the test gas in the cover member is set on the container 41 of the syringe 41.
It is preferable to apply it to c.

As described above, according to the present invention, gas supplied at the site can also be used as a test gas, and there is no need to replace the test gas container with a container for each test gas with the upper and lower concentration limits. This provides a very convenient inspection device that can cover other types of gas leak alarms of different sizes.

It should be noted that the present invention is by no means limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist thereof. For example, the first
In the configuration illustrated in FIGS. 2 and 2, the inspection gas supply tube 16 and the cord 18 do not necessarily need to pass through the inside of the support arm 11, and the support arm 11 may also be configured to be telescopic or to connect a spare arm. can. Furthermore, when the alarm 4 is for propane gas rather than city gas, the support arm 11 can be omitted because the alarm is installed at a low location.

[Brief explanation of drawings]

Fig. 1 is an overall view showing an example of an inspection device for a gas leak alarm according to the present invention, Fig. 2 is a sectional view of its main parts, Fig. 3 is a diagram showing an example of its electric circuit, and Fig. 4
The figure shows another embodiment of the present invention. 1...Covering member, 4...Gas leak alarm, 5...
...Inspection gas injection tube, 6...Fan, 9...Fan motor, 11...Support arm, 16...Inspection gas supply tube, 21...Handle, 23...Remote switch, 24...Gas cock, 25... Inspection gas pipe, 27...Remote code, 29...
... Metering pump, 30... Pump box, 36...
...Inspection gas tube, 38...Inspection gas container, 4
0...Three-way valve, 41...Syringe.

Claims (1)

[Scope of utility model registration request] A cover member having an internal volume large enough to hermetically cover several types of gas leak alarms of different sizes, a container filled with inspection gas, and disposed between the inspection gas container and the cover member. A metering pump or a syringe that can adjust the amount of piston extrusion, and a test gas supply passage member that connects the metering pump or syringe to the inside of the test gas container and the cover member, respectively. An inspection device for gas leak alarms, characterized by: