JPH056130B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a portable testing device for pressure-operated equipment attached to, for example, a dangerous goods tank.

<Prior Art> Class 4 hazardous materials tanks stipulated by the Fire Service Act are equipped with a ventilation pipe equipped with a breather valve (atmosphere valve), and periodic maintenance and inspection of the breather valve is required.

In addition, the Fire Service Act stipulates that breather valves must be able to operate with a pressure difference of 500 mm or less from high water pressure. Therefore, during inspections, it is necessary to check whether operation is normal under such minute pressures. It is necessary to check whether or not.

Furthermore, when a liquid is flowing into a hazardous materials tank, the pressure inside the tank is positive, and at this point the breather valve is activated to release the air inside the tank to the outside.On the other hand, when the liquid is flowing out, Since the pressure inside the tank is reduced, the structure is such that outside air is sucked in through the breather valve, so during periodic inspections of the breather valve, check the operability of both positive and negative pressure. Needs to be inspected.

Conventionally, the above-mentioned breather valve inspection has been carried out by removing the breather valve from the top of the tank, lowering it to the ground, carrying it to a testing room, etc., carrying out the prescribed inspection there, and then carrying it back to the top of the tank and reinstalling it. It was done according to the procedure.

<Problems to be Solved by the Invention> However, according to the conventional method, the breather valve is removed from the tank, making it impossible to test it in the operating state. It takes effort and time to bring it up again,
While the breather valve was being removed, there were problems such as having to replace it with a spare machine.

The present invention has been made in order to solve the above-mentioned problems all at once, and it is necessary to remove the breather valve from the tank when inspecting and testing the operation of a breather valve attached to a dangerous goods tank. The purpose of the present invention is to provide a portable test device that can test the operability of both positive pressure and negative pressure with one device.

<Means for solving the problems> This will be explained with reference to the embodiments shown in FIGS. 1 and 2.

The portable test device of the present invention includes a gas cylinder 2 that is a source of positive pressure and negative pressure, a pressure gauge 3 that measures and displays the positive pressure and negative pressure, and an aspirator that cooperates with the gas cylinder 2 to generate negative pressure. 4, a first nozzle 18 connected to the pressure gauge 3, a second nozzle 19 connected to the gas cylinder 2 or the aspirator 4, and their first and second connection ports 18, 19.
an auxiliary tool 14 equipped with vent holes 22 and 23 that communicate with the pressure port of the breather valve 25; the gas cylinder 2, the pressure gauge 3, the aspirator 4, and the auxiliary tool 1;
4 and the connecting tubes interconnecting them.

<Function> As shown in FIG. 3, the auxiliary tool of the present invention is used by being interposed between the tank body 24 and the breather valve 25 to be tested. When performing a positive pressure test, the fourth
As shown in the figure, the first nozzle of the auxiliary tool is connected to the positive pressure nozzle of the pressure gauge, and the second nozzle of the auxiliary tool is connected to the gas cylinder. When performing a negative pressure test, as shown in Figure 5, connect the first nozzle of the auxiliary device to the negative pressure nozzle of the pressure gauge, connect the second nozzle of the auxiliary device to the vacuum nozzle of the aspirator,
Connect the aspirator's gas inlet nozzle to the gas cylinder.

<Example> FIG. 1 shows an example of the present invention. A single portable container 1 stores a gas cylinder 2, a pressure gauge 3, an aspirator 4, a box 5 containing auxiliary tools, and a box 6 containing a connecting pipe.

The gas cylinder 2 serves as a source of positive pressure and negative pressure, and uses, for example, fluorocarbon gas for cooling automobiles. A gas outlet nozzle 7 and a regulating valve 8 project outside the side wall of the container 1. Pressure gauge 3 is water column 0-50
It measures and displays the minute pressure in mm, and the positive pressure nozzle 9
and a negative pressure nozzle 10, both nozzles 9,
10 both protrude outside the side wall of the container 1. The aspirator 4 generates a negative pressure in the vacuum nozzle 13 when positive pressure gas is passed from the gas inlet nozzle 11 to the gas discharge port 12.
2 and 13 protrude outside the side wall of the container 1. box 5
Auxiliary tools for testing, which will be described later, are stored inside the box 6, and a rubber hose that connects each part is stored in the box 6.

FIG. 2 shows the test aid 14. The overall shape is a disk shape, and is made of stainless steel, for example.
The upper surface 15 and the lower surface 16 are finished flat, and a first nozzle 18 and a second nozzle 19 protrude from the outer surface 17, and these nozzles 18, 19 are connected to holes 20, 21 in the center of the upper surface 15 and a ventilation hole 22. , 23. As shown in FIG. 3, the outer diameter may be a size that can be held by the flange joint 26 connecting the tank 24 and the breather valve 25, and a plurality of large and small sizes are prepared depending on the purpose. The thickness is sufficient as long as the ventilation holes 22 and 23 are formed, and is very thin, for example, 7 mm. A loop-shaped groove 27 may be carved on the outer periphery of the upper surface 15 and the lower surface 16.

Next, how to use it will be explained.

FIG. 4 shows the connection relationship when performing a positive pressure test. One of the two nozzles 18 and 19 of the auxiliary tool 14 is connected to the positive pressure nozzle 9 of the pressure gauge 3, and the other is connected to the gas outlet nozzle 7 of the gas cylinder 2. Connecting. When the regulating valve 8 of the gas cylinder 2 is opened, gas pressure acts on the breather valve 25, and the pressure value at that time is displayed on the pressure gauge 3.

Figure 5 shows the connection relationship when performing a negative pressure test. One of the two nozzles 18 and 19 of the auxiliary tool 14 is connected to the negative pressure nozzle 10 of the pressure gauge 3 and the other to the vacuum nozzle 13 of the aspirator 4, and the gas outlet nozzle 7 of the gas cylinder 2 and the gas inlet of the aspirator 4 are connected. Connect the nozzle 11. When the regulating valve 8 of the gas cylinder 2 is opened, the aspirator 4 is operated to create a negative pressure in the vacuum nozzle 13 and the breather valve 25, and the pressure value at that time is displayed on the pressure gauge 3.
In addition, in FIGS. 4 and 5, 28 and 29 are gaskets made of soft rubber or the like.

It goes without saying that the structure and shape of the auxiliary tool of the present invention may be modified as appropriate depending on the structure of the object to be tested.

<Effects of the Invention> As explained above, according to the present invention, the inspection required for the breather valve of a dangerous goods tank, that is, the operability quality at minute pressure, can be performed under both positive pressure and negative pressure conditions. The tests described above can be carried out with a single test device, and there is no need to remove the breather valve from the tank to perform such tests. This eliminates the tedious work involved in unloading and lifting from the ground.

In addition, gas cylinders that generate both positive and negative pressure are stored in a portable container, so there is no need to separately prepare equipment such as vacuum pumps or compression pumps during inspections. Since positive and negative pressure are generated by sharing a gas cylinder,
The entire device can be made compact.

Furthermore, according to the present invention, since the inspection can be carried out without using electricity, there is also the advantage that it is safe even in a dangerous atmosphere without the risk of ignition, ignition, or explosion.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a perspective view showing an embodiment of the auxiliary tool 14 of the present invention, FIG. 3 is an explanatory diagram of an application example of the present invention, and FIGS. 4 and 5 FIG. 2 is an explanatory diagram of the operation of the embodiment of the present invention. 1... Portable container, 2... Gas cylinder, 3...
Pressure gauge, 4... Aspirator, 5... Auxiliary equipment storage box, 6... Connection pipe storage box, 14... Auxiliary equipment, 15
...Top surface, 16...Bottom surface, 17...Side surface, 18...
...first connection port, 19...second connection port, 22,
23...Vent hole.

Claims (1)

[Claims] 1. A gas cylinder that is a source of positive pressure and negative pressure;
A pressure gauge that measures and displays positive pressure and negative pressure, an aspirator that generates negative pressure in cooperation with the gas cylinder, a first connection port that connects to the pressure gauge, and a first connection port that is connected to either the gas cylinder or the aspirator. a second connection port, the first and second
an auxiliary device equipped with a vent hole that communicates the connection port of the breather valve with the pressure port of the breather valve, and a portable container that houses the gas cylinder, pressure gauge, aspirator, auxiliary device, and connecting pipe that interconnects them. Portable testing device for breather valves. 2. A patent characterized in that a positive pressure nozzle and a negative pressure nozzle of the pressure gauge, a gas inlet nozzle, a gas discharge nozzle, and a vacuum nozzle of the aspirator are held so as to protrude from the side wall of the portable container. A portable test device for breather valves according to claim 1.