JPS60168034A - Leak testing device - Google Patents

Abstract

PURPOSE:To connect easily a body to be tested, and also to automate a device by connecting and separating a connecting plate connected to a communicating vessel, to and from the body to be tested by leading in and exhausting a compressed air to and from a compressed air pipe for surrounding the communicating vessel. CONSTITUTION:A body 11 to be tested which has a connecting seat 25 and is provided with a port 26 on its center part is placed in the inside of an outer case 1. When a compressed air is fed to a compressed air pipe 17 from a compressed air leading-in device 18, the compressed air pipe 17 extends and a connecting plate 15 descends, and the connecting plate 15 and the connecting seat 25 adhere tightly to each other. The outer case 1 and the inside of the body 11 to be tested are exhausted by vacuum pumps 2, 6. After completion of the exhaust, a gas is fed into the inside of the outer case 1 by a gas leading-in device 3 by switching stop valves 4, 5, 8 and 9, also a leak detector 7 is operated, and a leak condition of the body 11 to be tested is inspected. After completion of the inspection, the connecting plate 15 is lifted by exhausting the compressed air from the inside of the compressed air pipe 17, and the body 11 to be tested can be taken out. In this way, this device is connected easily to the body 11 to be tested and it can be automated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a leak test device, and more particularly to a leak test device for investigating the leak state of a test object used as a vacuum container.

[Technical background of the invention]

Figure 1 shows a leak test device using the conventional outer covering method (hood method).
A gas introduction device 3 for supplying globe gas such as the like is connected in parallel via on-off valves a and S, and another vacuum pump t and a leak detector 7 are connected in parallel via on-off valves g and ri, respectively. A communication pipe 10 connected in parallel is provided through the outer box.

In such equipment, there is a vacuum container inside the outer box.
The communicating tube 10 and the test object // are connected with bolts, nuts, etc. (not shown). Then, after evacuating the inside of the outer box/sha test specimen ii by 1 vacuum bongco and Otsu, each vacuum bong f, 2
．． Close the υ14 valve on the side, close the valve r, and open the on-off valve on the side to send gas from the gas introduction device 3 to the inside of the outer box l. If there is a leak in the test object //, the above gas enters the test object //, and the leakage state of the test object l/ can be determined by detecting this gas with the leak detector 7. Let it be.

Fig. 2 shows a leak test device using the pressurized rope method (sniffer method). The other parts are the same.

Therefore, in this device, after evacuating the outer box/and the test object//, gas is sent into the test object//.
The leak detector 3 is configured to detect the amount of gas leaking into the outer box.

[Problems with background technology]

In the above-mentioned apparatus, the test object/l is connected to the communication tube l.
Since bolts and nuts are used when connecting to G, it has the disadvantage that it takes time and effort to connect the test object. Furthermore, since the bolts and nuts are tightened manually, there is also a drawback that the leak testing apparatus cannot be automated.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a leak test equipment Shio Y that allows easy connection of a test object and is compatible with automation of the equipment. It is something.

[Summary of the invention]

In order to achieve the above object, the leak test device of the present invention is provided with a connecting plate having a boat bored in the center thereof, the communicating pipe is connected to the boat of this connecting machine, and a connecting plate is provided around the communicating pipe. A compressed air pipe connected to the compressed air introducing device through the outer box is connected to the upper surface of the connecting plate, and the communicating pipe and the compressed air pipe are formed in a serpentine shape so as to be expandable and retractable. The above-mentioned connection is connected to and disconnected from the test object by expanding and contracting the air pipe as compressed air is introduced and discharged, and the connection can be made without using bolts or nuts. I'm embarrassed.

[Embodiments of the invention]

Hereinafter, an embodiment of the present invention will be explained with reference to FIG. 3, and the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals.

FIG. 3 shows an embodiment in which the present invention is applied to a leak test device using the Sotomaki method. Ji
l: Closed by the lid body 19. This lid/II-
A communication pipe 10 is provided through the pipe 10, through which a vacuum cylinder f and a leak detector 7 are connected to the parts via on-off valves g and ri, respectively. The end of this communication pipe 10 is connected to a disk-shaped connection, a boat/6 bored in the center of the plate 15. In addition, a compressed air pipe /7 that surrounds the communication pipe 10 and whose end is connected to the upper surface of the connection plate /3 is provided through the "2-note common /&"; The air pipe 7 is connected to a compressed air introduction device provided outside the outer box via an on-off valve 19. Furthermore, direct air? Connected to the housing 2/ and the lid body/l
An exhaust pipework is provided that passes through the #
1. Pass one connection plate /j through so that it is open on the n side, and connect it to the connection field f. Above description '3j7I tube 10. Compressed air pipe/7
, the exhaust pipe is made of metal such as stainless steel and has no connections.
11. with i,, & is and lid body/Hiroshi. The part is formed into a bellows shape so that it can be expanded and contracted. Above connection plate/36')
There are sealing parts such as O rings on both sides of the exhaust @ force, 2 holes, 24
L is provided.

In the above case, the test object 7, which has a connecting seat J formed protrudingly on the upper surface and a boat J provided approximately in the center of the connecting seat J, is placed inside the outer box. Then, when compressed air enters the compressed air pipe 7 from the compressed air introduction device 7, the compressed air pipe 7 extends and the connecting device 15 Descend and connect plate 1
5. The connection seat J of the test object// is in close contact. With the connection plate /S and the connection seat 5 in close contact with each other in this way, the inside of the outer box / and the test object // is evacuated using the vacuum bong 71''λ, B. After the evacuation is completed, open and close it. Ben≠, Yu 1g
, the gas introduction device 3 sends gas to the inside of the outer box, and the leak detector 7 is activated to inspect the leakage state of the test object. At this time, vacuum bonder 2
By activating / to perform exhaust and purification from V; gas, the gas entering from between the connecting plate 15 and the connecting seat 5 is exhausted, so that only the gas passing through the test object l is exhausted. Detection accuracy is improved.

After the leak test is completed, all the devices are stopped and the compressed air is discharged from the inside of the compressed air pipe /7, so that the connection plate 15 is lifted and the test object 1/7 is taken out. In this case, the lifting force of the connection plate 15 is about 1071174, but the
There are no inconveniences for the parties when putting in and taking out l.

According to the above-mentioned apparatus, it is possible to easily perform a leak test, and it is also possible to conduct a leak test automatically by controlling each device, on-off valve, etc. with a conbeater or the like.

In this embodiment, only an example in which the method is applied to the external ridge method is shown, but it goes without saying that it can also be applied to other leak test devices such as the pressurized globe method.

〔Effect of the invention〕

As described above, the leak test device according to the present invention moves the connecting plate connected to the communication pipe by discharging compressed air into the compressed air pipe surrounding the communication pipe. Since the connection plate is connected to the device under test, it is possible to easily connect the connection plate to the device under test without using bolts, nuts, etc. It is possible to save time and effort and to significantly shorten the time required to cultivate pears. 1. By fully automatically controlling the compressed air introduction device, it is possible to perform a leak test automatically.

4/6 Brief Description of the Drawings Figs. 1 and 2 are schematic diagrams showing a conventional leak test device, respectively, and Fig. 3 shows an embodiment of the present invention.
This is a sketch of Sakaki Seizu.

/...outer box, ko, t, 2/...vacuum bonder, 3...
・Gas introduction equipment'', gu, j, za, 5', /9.呵・・υ
'r] Valve closed, 7... Leak detector, /C... Communication pipe, l/... Test object, /2... Fran6/J.=...
Opening, /41... Lid body, 15... Connection plate, /6. Fu...Port 5/7...Compressed air pipe, /za...Compressed air introduction device, Yuko...Exhaust pipe, J...Exhaust Wtr
, 21..., restraint part A, , 2.5...1 position.

One applicant: Kiyoshi Inomata 1st eye Name 2 illustration

Claims (1)

[Claims] A vacuum pump and a leak detector are connected in parallel to one of the outer box of the device and a communication pipe that passes through the outer box and connects to the test object placed inside the outer box, and the other. In the leak testing apparatus, a central part is connected to another vacuum pump and a gas introduction device in parallel, and the leak detector detects the amount of gas sent from the gas introduction device leaking from the test object. A connecting plate with a port bored therein is provided, and the communicating pipe is connected to the port of this connecting plate, and the connecting pipe is provided around the communicating pipe and is connected to the compressed air introduction equipment by tracing the outer box 1j. A compressed air pipe is connected to the upper surface of the connecting plate, and the communicating pipe and the compressed air pipe are formed to be expandable and contractible in the shape of a serpentine mold. A leak test device whose characteristic is that the connection plate connects and disconnects from the test object in a circular manner.