JPH0452666Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Field of industrial application) Our proposal is for pressurizing multiple underground tanks and their attached connecting piping that store petroleum and other hazardous materials that require inspection based on the Fire Service Act. Or, the leakage result is investigated by calculating the change in pressure by reducing the pressure, and the purpose is related to a leakage inspection device for multiple underground tanks that can inspect multiple or more underground tanks at the same time. It is something.

(Prior Art) Conventionally, as a method for carrying out airtight leakage tests for underground tanks and attached underground piping according to the Fire Service Act, it is common to test each underground tank individually. Therefore, in this case, a lot of inspection work and time are required, and inspection of a plurality of tanks has the drawback that it is extremely uneconomical in terms of cost.

Additionally, the inlet of the connecting pipe that is used to check for leaks in the gasoline tank is generally tightly capped to maintain airtightness. Therefore, first remove the cap that is closed at the end of the connecting pipe, and then install a component for both air supply and intake and a pressure detection part with a detection nozzle at the inlet of the connecting pipe by screwing or other means. A method of attaching it by attaching it is used. However, when testing with such a method, it is necessary to install the air supply/exhaust section and the pressure detection section at separate positions, which is very inconvenient. In addition, attachment fittings such as caps at the entrances of the connecting pipes become difficult to remove due to the occurrence of rust, resulting in poor inspection work efficiency and great difficulties in terms of labor, time, and accuracy.

(Problems to be solved by the invention) The present invention was devised in view of the above-mentioned drawbacks, and the installation work would be extremely difficult if each underground tank was tested separately as in the past. Not only is it troublesome and time consuming, but serious problems have become even more serious, such as the fact that the inspection tool at the pipe entrance cannot be installed correctly due to rust over the years.

The present invention solves the above-mentioned problems, and its main purpose is to apply the same pressure to multiple underground tanks using an inspection device consisting of a pressure detection part and a supply/exhaust part. The point is that multiple tanks are tested in the same way as when testing each tank individually.

(Means for Solving the Problems) In order to solve all of the above-mentioned problems, the leakage testing device of the present invention uses a fastening fitting as one main fastening fitting 5 and at least a plurality of sub-fastening fittings 6. Configure. This main fastening fitting 5 connects the pressure detection part 1 and the supply/exhaust part 2, and the supply/exhaust part 2 has a supply/exhaust branch pipe 3 provided with at least a plurality of connection parts 15, 15... The secondary fastening fittings 6, 6, . . . are connected to the connecting portions 15, . A body 18 and a semicircular locking member 19 are provided, and a detection nozzle opening 8 is installed in the sealing lid body 18. In addition, the secondary fastening fittings 6, 6
The above object is achieved by installing a sealing lid 29 and a semicircular locking member 30 in the case.

(Function) The present invention has the above-mentioned configuration, and the usage state of this leakage testing device will now be explained as shown in Figures 2 and 4.
As shown in Fig. 6, when testing for leakage from a plurality of underground tanks A, A... buried underground, the lids of the connecting pipes 27, 27 connected to the underground tanks A, A, etc. Remove the body and attach this lubricating cap 28, 2.
8, first attach the main fastening fitting 5 to the one lubricating cap 28 by attaching it to the lower semicircular locking fitting 19.
Using the lubricating cap 2 from the side as shown in Figure 4.
8, and the end of the oil filler cap 28 is pressed against the airtight packing material 20 on the inner surface of the sealing lid 18, and the sealing lid 18 and the semicircular locking member 19 are connected to the bolt 25 and nuts 26 on both sides or one side. 26, the main fastening fitting 5 is firmly fastened to the oil filler cap 18. Note that the semicircular locking tool 19 has a locking portion 2 facing the internal semicircular hole.
3 and 23 are slidably installed and engaged with the oil filler cap 28, and the fitting hole 33 of the semicircular locking tool 30 shown in FIG. In some cases, the main fastening fitting 5 may be fastened by engaging the lubricating cap 28 with the opposing locking portions 32, 32.

Next, the semi-circular locking fittings 30, 30 at the bottom of the sub-clamping fittings 6, 6, 6 are installed for the oil filler caps 28, 28... in several other underground tanks A, A... The fitting hole 33 is inserted from the side as shown in FIG. , 39 and Natsu 4
Screw on the oil filler caps 28, 28 with 0.0 and 40...
Tightly fasten to...

As described above, after the main fastening fittings 5 and the sub-fastening fittings 6, 6, .
Alternatively, atmospheric air is forced into underground tanks A and A, and slight pressurization is applied inside the tanks. The nozzle port 8 detects the state of reduced pressure or slight increase in pressure generated by this operation.
During this period, pressure fluctuations are visually observed using a manometer and recorded using a recorder, and the changes are accurately recognized to determine the presence or absence of a leak. In addition, multiple underground tanks A,
If leakage is discovered in A..., inspect each unit one by one by adjusting and opening and closing valves 11 and 36 of the main fastening fittings 5 and sub-fastening fittings 6, 6, respectively. This system is designed to detect leaking underground tanks.

(Embodiment) To explain an embodiment of the present invention with reference to the drawings, as shown in Fig. 2, underground tanks A, A, etc. buried underground are connected to connecting pipes 27 for ventilation,
27... are connected, and these connecting pipes 27, 27...
One main fastening fitting 5 and a plurality of sub-fastening fittings 6, 6 of an inspection device used for leakage inspection are connected to the oil filler cap 28 located at the end of the leakage test device.

In the main fastening fitting 5, a pressure detecting section 1 and a supply/exhaust section 2 are integrally arranged side by side on the upper surface of an upper sealing lid 18, and these are connected by a connecting pipe 7. A detection nozzle is inserted into the pressure detection section 1, and a detection nozzle port 8 is provided at the tip of the pressure detection section 1, which is connected to the sealing lid 1.
8 and is attached so as to protrude slightly. Next, the supply/exhaust section 2 is formed with a supply/exhaust branch pipe 3 provided with several connecting portions 15, 15 in a direction substantially perpendicular to a predetermined position thereof.

Further, a pressure detecting hose 1 is connected to the end of the pressure detecting section 1 through a joint section 9 such as a plug socket.
3 are connected. The air supply and exhaust section 2 has valves 11, 11 such as ball valves for opening and closing at appropriate positions, and a hose 12 for air supply and exhaust is connected to one end via a joint 9 such as a plug socket. It's summery.

Next, the main fastening fitting 5 connected to the connecting pipe 7 has an upper sealing lid 18 and a lower semicircular locking member 19, and the outer periphery of the sealing lid 18 is Opposed protrusions 21, 21 are provided in a protruding manner, and an airtight packing material 20 is bonded to the inner surface of the lubricating spout 28 so as to press the end thereof. The detection nozzle port 8 is inserted through the center of the airtight packing material 20 so as to protrude therefrom. The semicircular locking tool 19 is provided with opposing flanges 22, 22 on the outer periphery, and a locking portion 23 with a sliding groove 24 that moves forward and backward inward with respect to the flanges 22, 22. ,23
It is equipped with. Further, bolts 25, 25 are inserted through the protrusions 21, 21 and the flanges 22, 22, and nuts 26, 26 such as wing nuts can be freely screwed onto one or both sides of the bolts 25, 25. It is screwed together.

Next, the secondary fastening fittings 6 shown in FIGS. 5 and 6 are as follows:
This is a partial configuration of the main fastening fitting 5, in which protrusions 31, 31 are protruded from the outer periphery of the upper sealing lid 29, and a semicircular locking fitting 30 is provided at the lower part.
is provided with flanges 34, 34 facing the outside, and has a fitting hole 33 formed inside, and this fitting hole 3.
The locking portions 32, 32 are formed to have a size of 3 and engage with the edge of the oil filler cap 28. Further, an airtight packing material 35 having an air supply/exhaust hole provided in the center portion is adhered to the inner surface of the airtight lid body 29. The protruding parts 31, 31 and the collar parts 34, 34
Insert the bolts 39, 39, and attach nuts 4, such as wing nuts, to the ends of the bolts 39, 39.
0.40 screws are screwed together so that they can be screwed freely.

Furthermore, connection hoses 16, 16, 1 are connected to several connection parts 15, 15, .
6, and a connecting pipe 3 having coupling parts 17, 17, 17 such as plugs and sockets interposed at the ends of the connecting hoses, and provided with valves 36, 36 for opening and closing.
The secondary fastening fittings 6, 6, 6 are connected to the auxiliary fastening fittings 7, 37.

(Effects of the invention) Since the invention is configured as described above, if an airtight leakage test is performed using this leakage testing device, it will take time and effort to conduct each underground tank separately, unlike the conventional method. There is no need to conduct a separate test, and the convenient effect is that multiple underground tanks can be easily and reliably tested for leaks in a single inspection process and time, and when testing multiple tanks for leaks, the main fastening fitting can be attached to the oil filler cap of each connecting pipe. Since the connection can be made quickly and reliably using the and auxiliary fastening fittings, the preparation work can be greatly simplified, and there is an excellent effect that the fittings can be airtightly connected without coming off during the process. The main fastening fitting 5 is connected to a pressure detection part and a supply/exhaust part, and a supply/exhaust branch pipe having a plurality of connection parts or more is connected to the supply/exhaust part.
By connecting a plurality of sub-clamping fittings to each of the connection parts through connection hoses for air supply and exhaust,
Since the same pressure can be reliably applied in a plurality of underground tanks, and the pressure detection part is only connected to one place on the upper part of the main fastening fitting 5, it is very economical, and the sub-fastening fitting 5 is very economical. This has the effect of significantly simplifying the internal structure.

Furthermore, by the upper sealing lid and the lower semicircular locking device provided on the main fastening metal fitting and the secondary fastening metal fitting,
It is easy to engage the oil filler cap from the side, the sealing lid tightly presses the end of the oil filler cap, and the main fastening fitting and the secondary fastening fitting can be removed from each oil filler fitting. It can also be done extremely simply and has unprecedented efficiency effects.

[Brief explanation of the drawing]

Figure 1 is a side view of the configuration of the inspection device of the present invention, Figure 2 is a side view of the present invention installed in an underground tank, Figure 3 is a slope view of the main fastening fittings, and Figure 4 is a side view of the proposed inspection device.
The drawings are also a vertical side view, FIG. 5 is a slope view of the sub-fastening fitting, and FIG. 6 is a vertical side view. Symbol A is an underground tank, 1 is a pressure detection part, 2 is a supply/exhaust part, 3 is a supply/exhaust branch pipe, 5 is a main fastening fitting, 6 is a sub-fastening fitting, 7 and 37 are connecting pipes, 8 is a detection nozzle port, 9, 10, 17 are joint parts, 12 is a supply/exhaust hose, 13 is a pressure detection hose, 15 is a connection part,
16 is a connection hose, 18 and 29 are sealing lids, 1
9 and 30 are semicircular locking devices, 20 and 35 are airtight packing materials, 27 is a connecting pipe, and 28 is an oil filler cap.

Claims (1)

[Scope of utility model registration request] In an underground tank leakage inspection device that attaches fastening fittings to a plurality of underground tanks A, A, and performs leakage inspection of each underground tank A, A, piping, etc., the underground tanks A, A... . . . is connected with connecting pipes 27, 27 . . . for ventilation, and
A lubricating cap 2 is attached to the end of the connecting pipes 27, 27...
8, 28, and connect one main fastening fitting 5 and a plurality of sub fastening fittings 6, 6 to the ends of the oil filler fittings 28, 28, respectively, and connect the main fastening fittings 5 to the main fastening fittings 5. A pressure detection section 1 and a supply/exhaust section 2 are arranged and connected in parallel on the upper surface of an upper sealing lid 18, and a detection nozzle is inserted inside the pressure detection section 1, and a detection nozzle at the tip is inserted into the pressure detection section 1. The opening 8 is attached through the sealing lid 18, and the supply/exhaust part 2 is formed with a supply/exhaust branch pipe 3 having several connecting parts 15, 15 at predetermined positions and substantially perpendicular to the direction. A supply and exhaust hose 12 is connected to the supply and exhaust section 2 through valves 11, 11, and a joint section 9 is connected to the end of the pressure detection section 1.
The pressure detection hose 13 is connected to the main fastening fitting 5 which is connected to the connecting pipe 7, and the upper sealing lid 18 and the lower semicircular locking fitting 19 are attached with bolts 25, 25. An airtight packing material 20 is adhered to the inner surface of the sealing lid body 18 and is in pressure contact with the oil filler cap 28.
Locking portion 2 that moves forward and backward toward opposing flanges 22, 22
3 and 23, and the secondary fastening fitting 6 is further equipped with:
Insert and screw the upper sealing lid bodies 29, 29 and the lower semicircular locking fitting 30 using bolts 39, 39,
A leakage testing device for a plurality of underground tanks is characterized in that airtight packing materials 35, 35 provided with air supply and exhaust holes are adhered to the inner surfaces of the sealing lids 29, 29.