JPH0430515Y2 - - Google Patents

Description

[Detailed description of the device] (Field of industrial application) This device is used to pressurize or This invention relates to a fastening device for leak inspection of underground tanks, etc., which is used when investigating the results of leakage based on changes in pressure after reducing the pressure.

(Prior Art) Generally, the inlet of a connecting pipe for inspecting the presence or absence of leakage in a gasoline tank or the like of this type is currently tightly capped in order to maintain airtightness. Therefore, first remove the cap covering the end of the connecting pipe. At the inlet of this piping, a method is adopted in which a component for both air supply and intake and a pressure detection section with a detection nozzle are attached by screwing or other means.

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, the attachment fittings such as the caps at the entrance of the connecting pipes become difficult to remove due to the occurrence of rust, which leads to disadvantages such as poor inspection efficiency and a great deal of trouble in terms of labor, time, and accuracy. was occurring.

(Problems to be Solved) This invention attempts to solve each of the above-mentioned drawbacks, and for leakage inspection of underground tanks, the supply/exhaust part and the pressure detection part connected to each hose are separately connected to each other. Not only does it take a lot of time and effort to put it on, but it also poses the serious problem of not being able to reliably carry out dangerous work that requires precise inspection.

This device was devised in view of the conventional problems as described above, and its purpose is to integrate the functions of the above-mentioned supply/exhaust section and a pressure detection section with a pressure nozzle into a pressure testing device. The fastener can be easily and securely attached to the end of the connecting pipe.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the fastening tool for leakage inspection of this invention has the following features:
and a lower semicircular receiving metal fitting 3. A supply/exhaust section 7 and a pressure detection section 8 are integrally installed in the upper part of the sealing lid body 2. At both ends of the receiving fitting 3, tightening flanges 10, 10 are protruded, and sliding locking pieces 12, 12 having guide grooves 13 bored in the tightening flanges 10, 10 can be moved back and forth. to be installed. Further, the tightening protrusions 5, 5 provided on the sealing lid body 2, the tightening flanges 10, 10, and the sliding locking pieces 12, 12 can be freely screwed together with fixing bolts 15, 15 and nuts 16, 16. We are planning to achieve the above objectives by working closely with the following.

(Function) This device has the above-mentioned configuration, and to explain the state in which the fastener of this device is used, the fastener is fastened to the oil filler cap 18 at the end of the connecting pipe 17 connected to the underground tank 20. Fit the receiving fitting 3 into the semicircular side of the receiving fitting 3 of the tool 1 as shown in FIG. A sliding locking piece 12 provided on the lower side of the tightening collar 10,
12 is advanced along the guide groove 13 and engaged. next,
Tightening protrusions 5, 5 provided at opposing positions on the sealing lid body 2, and tightening flanges 1 provided at both ends of the receiving metal fitting 3.
By screwing the ends of the fixing bolts 15, 15 which pass through the connecting pipe 17 from both sides with nuts 16, 16,
Tighten the fastener 1 firmly. With this tightening, the air supply/exhaust section 7 and the pressure detection section 8, which are integrally provided on the airtight lid 2, can be inspected for leakage in the underground tank by operating the air supply/exhaust hose 22 and the pressure detection hose 23, respectively. It is something that does.

(Example) Next, an example of this invention will be described with reference to the drawings. A connecting pipe 17 for ventilation is connected to a buried underground tank 20. The fastener 1 is connected to the oil filler cap 18 located at the end of the connecting pipe 17 during a leakage test. This binding tool 1 is
Upper sealing lid body 2 and lower semicircular receiving metal fitting 3
It is composed of. The airtight lid body 2 includes:
Tightening protrusions 5, 5 through which fixing bolts 15 are inserted are provided protrudingly at opposing positions. Furthermore, an airtight material 6 made of an elastic material is adhered to the inner surface of the sealing lid 2, and is made of an elastic material and presses against the end side of the oil filler cap 18. Furthermore, the upper part of the sealing lid 2 is provided with a supply/exhaust section 7 and a pressure detection section 8 integrally installed approximately in the center thereof. A supply/exhaust hose 22 is connected to the supply/exhaust section 7 , a pressure detection hose 23 is connected to the pressure detection section 8 , and a detection nozzle port 9 is inserted into the pressure detection section 8 . The structure is as follows.

Next, the semicircular receiving fitting 3 has a tightening collar portion 10 at both opposing ends through which the fixing bolt 15 is inserted.
10 is formed in a protruding manner. This tightening collar 1
0 and 10 have sliding recesses 11 and 11 formed on one side thereof, and a sliding locking piece 12 is installed inside so as to move forward and backward. This sliding locking piece 12 is provided with a sliding guide groove 13 and, if necessary, a concave arc portion of various shapes is formed at the tip.

Further, the fixing bolts 15, 15 inserted through the tightening protrusions 5, 5 of the sealing lid 2 and the tightening flanges 10, 10 of the receiving metal fitting 3 have nuts 16, 16 such as wing nuts at both ends. ... are screwed together so that they can be screwed together freely. Reference numeral 21 indicates a measuring instrument.

(Effects of the invention) Since this invention is constructed as described above, the fastening tool can be easily and securely connected to the oil filler port of the connecting pipe during leakage inspection, and it can be tightly attached without coming loose. Convenient effects and just like before,
Since the fastener can be quickly connected without removing the cap at the end of the connecting pipe, there is an excellent effect of significantly simplifying the preparation work. By integrally installing the air supply/exhaust part and the pressure detection part on the upper part of the sealing lid, it becomes very easy to attach both to the sealing lid, and the pressure detection part can be easily attached to the lid. This has the advantage that the detection nozzle opening can be installed in the center of the sealing lid. In addition, a tightening flange is provided on both ends of the semicircular receiving fitting, and a sliding locking piece is installed on the tightening flange so that the connecting pipe can be moved forward and backward. It has the excellent effect of being able to be easily moved and reliably clamped to connecting pipes of various sizes without the need to remove the fittings. Furthermore, a fixing bolt is inserted between the tightening protrusion provided on the sealing lid and the tightening flange provided on the receiving metal fitting, and both ends of the fixing bolt are screwed together with nuts. Therefore, the connection pipe can be tightened while adjusting the tightness as appropriate, so there is no need to overdo it, and there is no need to worry about damaging or deforming the fastener, and the connection between the connection pipe cap and the sealing lid is ensured. It also has the effect of making it strong and ensuring sufficient airtightness.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the fastener of this invention, Fig. 2 is a longitudinal side view with the same partially cut away, Fig. 3 is a bottom view of the receiving fitting viewed from below, and Fig. 4 is the same. FIG. 5 is a vertical side view with a portion cut away, and is a side view showing the device connected to the mouthpiece of a connecting pipe such as an underground tank. 1 is a fastener, 2 is a sealing lid body, 3 is a receiving metal fitting, 5 is a tightening projection, 6 is an airtight material, 7 is a supply/exhaust part, 8 is a pressure detection part, 9 is a detection nozzle opening, 10 is a tightening part. Flange part, 12 is a sliding locking piece, 1
3 is a guide groove, 15 is a fixing bolt, 16 is a nut,
17 is a connecting pipe, and 18 is an oil filler cap.

Claims (1)

[Scope of utility model registration request] In a fastening tool for leakage inspection connected to a connecting pipe of an underground tank, the fastening tool has an upper sealing lid body and a lower semicircular receiving fitting, and the upper part of the sealing lid body has a The intake part and the pressure detection part are integrally installed, and a tightening flange is protruded from both ends of the semicircular receiving metal fitting, and a sliding locking piece can be moved back and forth on the tightening flange. An underground tank characterized in that the tightening protrusion provided on the sealing lid, the tightening collar, and the sliding locking piece are screwably fastened together using fixing bolts and nuts. Tightening device for leakage inspection such as.