JP4586059B2 - Simple airtightness tester - Google Patents

Description

  The present invention relates to a simple airtight tester using an ejector type vacuum generator.

  In a device with an underwater waterproof structure, in order to check the airtight structure of the case of the device during manufacturing, put the case into a tank-type waterproof tester and apply a specified water pressure for a certain period of time. Evaluate the performance of the chassis.

  However, usually, in order to protect electrical parts and internal parts, or to confirm the structure of important airtight parts, several units are required at the stage of each unit part (for example, before installation of electrical parts) before the device is completed. The waterproof test is often performed.

  Since the waterproof test is performed by storing water in a dedicated waterproof tester and increasing the pressure in the tank (water pressure), it takes a lot of time for each test when preparing and cleaning up.

  Therefore, the waterproof test is the final stage, and the airtightness test of each unit component is performed in the previous stage. Conventionally, as a device airtightness test technique with the waterproof test as the final stage, a process in which helium gas is injected into the device being the device under test, the inside of the device is pressurized, and the state change is measured. And a vacuum test technique for determining whether the waterproof structure of the device is good or bad by sucking a body gas from the inside of the device with a vacuum pump, reducing the pressure inside the device, and measuring the state change ( There has been a waterproof test technique (Patent Document 2) that operates a patent document 1) or an air pump (vacuum pump) to give a predetermined slight pressure difference to a test machine and measures a temporal change of the slight pressure difference.

However, all of these airtightness test technologies are large-scale test facilities using air pumps (vacuum pumps) and helium gas cylinders. are those that are constrained easy portable operation of portable, if you use the test equipment and transport to the work location, require a lot of time and effort in to clean up completion from the installation, there is a problem that .
JP 2002-98612 A Japanese Patent Laid-Open No. 11-14360

As described above, conventionally, an air pump (vacuum pump) is used, for example, when an airtightness evaluation test of an apparatus housing is performed on each unit component (for example, before mounting electrical parts) at a stage before completion of the apparatus. and not a specific test facility helium gas cylinder is permanent, a problem that those said sample regardless of specific Kenjo plants, and any state (operating state) simplified the testing device capable of easily performed under is not present was there.

The present invention solves the above-mentioned problems, and can be easily performed under any condition without specifying a test place for airtightness evaluation of various apparatus casings. The purpose is to provide a testing machine.

The present invention provides a simple airtight test machine using a vacuum generator (ejector) suitable for application to an airtightness evaluation test of an apparatus housing performed in a stage prior to a final waterproof test.

The simplified airtightness testing machine of the present invention is a simplified airtightness testing machine used for an airtightness test before a waterproofing test of a case to be inspected having a waterproof structure, and a coupler connected to a pipe to which compressed air is supplied joints and a flexible air tube connecting the vacuum plug adapter connected with the housing interior in an airtight condition of the inspection housing to be leak test, between the coupler joint and the vacuum plug adapter The ejector type vacuum generator for reducing the pressure inside the casing, which is sequentially arranged from the coupler joint side to the vacuum plug adapter side in the pipe line configured as described above, so as to keep the inside of the casing in a vacuum state manually characterized by comprising a vacuum gauge for monitoring the vacuum on / off switch capable off valve, and a vacuum state of the housing unit.

According to the present invention, it is an economically advantageous configuration that makes effective use of existing equipment, and can be easily performed under any condition without specifying a test place for airtightness evaluation of various devices. Can be provided.

  Embodiments of the present invention will be described below with reference to the drawings. Note that compressed air is required when using the simplified air tightness testing machine according to the embodiment of the present invention. Usually, a compressed air branch for air gun and air blow is provided at the product assembly site, and the test is performed. Sometimes this pipe is used as a source of compressed air.

FIG. 1 shows the configuration of a simple airtight tester using an ejector type vacuum generator according to an embodiment of the present invention.
A simplified airtight testing machine 3 according to an embodiment of the present invention is connected in a gastight state to a coupler joint 11 connected to a compressed air supply source 1 and a case interior 2a of a case 2 to be inspected for airtight inspection. The vacuum plug adapter 16 and the pipe line (air tube) 10 (10a to 10e) connecting the coupler joint 11 and the vacuum plug adapter 16 to the vacuum plug adapter 16 side from the coupler joint 11 side. The ejector-type vacuum generator 13 for depressurizing the housing interior 2a, the open / close valve 14 for keeping the housing interior 2a in a vacuum state, and the vacuum state of the housing interior 2a, which are sequentially disposed, And a vacuum gauge 15 to be monitored. In this embodiment, the structure which has arrange | positioned the filter regulator 12 for compression air pressure between the said coupler joint 11 and the ejector type vacuum generator 13 is illustrated.

  In the constituent elements of the simplified airtightness tester 3 described above, the coupler joint 11 is configured using a quick coupler joint that matches the equipment piping at the product assembly site (such as a production line) using the simplified airtightness testing machine. . The ejector-type vacuum generator 13 can be a small and light resin ejector. For example, a resin ejector having a nozzle capable of multistage output adjustment, an ejector with a silencer, and the like are applicable. As the on-off valve 14, for example, a manual type that can switch on / off the vacuum by pushing and pulling the shaft can be used. The vacuum gauge 15 is configured using an analog dial type vacuum gauge that does not require any electrical wiring. The vacuum plug adapter 16 is configured by using a plug adapter with a plug-in type that is fitted to the inter-unit connection hole 2h drilled by a housing design communicating with the housing interior 2a of the housing 2 to be inspected. The filter regulator 12 is added and used when the compressed air pressure cannot be adjusted at hand (on the compressed air supply source 1 side). The pipe line 10 (10a to 10e) for connecting the coupler joint 11 and the vacuum plug adapter 16 is configured using a flexible air tube.

The simple airtightness testing machine 3 configured as described above is small and light, and can be easily carried by an operator. Also, rather than a specific test facility air pump (vacuum pump) or helium gas cylinder is permanent, the electrical system from not require configuration at all, the operator is travel to any work place, the airtightness evaluation of various devices regardless of specific test site, and it can be easily performed under any condition.

  In the use procedure of the simplified airtightness testing machine 3 according to the above-described embodiment of the present invention, first, the simplified airtightness testing machine 3 is connected between the compressed air supply source 1 and the casing 2 to be inspected. That is, the coupler joint 11 is connected to the compressed air supply source 1, and the vacuum plug adapter 16 is connected to the housing interior 2a (inter-unit connection hole 2h) of the housing 2 to be inspected.

  While visually observing the vacuum gauge 15, the inside 2a of the case 2 to be inspected is gradually depressurized, and with the gauge raised to a certain level, the open / close valve 14 is pulled and the open / close valve 14 is turned off to inspect. The inside 2a of the housing 2 is evacuated.

  If there is an operating part in the case 2 to be inspected, the operating part is operated.

  If the gauge of the vacuum gauge 15 does not go down after a predetermined time has elapsed, the operator determines that the casing 2 to be inspected is airtight, removes the coupler joint 11 from the compressed air supply source 1, and the vacuum plug adapter 16. Is removed from the inter-unit connection hole 2h of the case 2 to be inspected, and the inspection of the case 2 to be inspected is completed.

  In this way, the airtightness test of the apparatus housing can be easily and quickly performed with simple operations and operations. As a specific example, since the use of a waterproof testing machine is unnecessary, the time required for moving, preparing, and cleaning up the testing machine is shortened. Unlike an internal pressure test, preparation of a water tank etc. is unnecessary. It is safer than the waterproof test and pressurization test. Since water is not used, the inside of the housing is not affected even if the airtightness test fails. No vacuum equipment such as a vacuum pump is required. The present invention can be applied to various apparatus casings from a small apparatus casing to a large apparatus casing. Tests can be conducted while operating the operating part. Since it is a decompression type, a vacuum plug adapter with a simple structure can be used.

The figure which shows the structure of the simple type airtight tester which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Compressed air supply source, 2 ... Case to be inspected, 2a ... Inside of case, 2h ... Inter-unit connection hole, 3 ... Simple airtight tester, 10 (10a-10e) ... Pipe line (having flexibility Air tube), 11 ... coupler joint, 12 ... filter regulator, 13 ... ejector vacuum generator, 14 ... open / close valve, 15 ... vacuum gauge, 16 ... vacuum plug adapter.

Claims (2)

A simple airtight testing machine used for an airtightness test before a waterproof test of a case to be inspected with an underwater waterproof structure and an operating part,
A coupler joint connected to a pipe supplied with compressed air;
A vacuum plug adapter connected air-tightly to the inside of the casing of the inspection housing to be leak test,
The inside of the housing, which is sequentially disposed from the coupler joint side toward the vacuum plug adapter side in a conduit constituted by a flexible air tube connecting between the coupler joint and the vacuum plug adapter An ejector-type vacuum generator that depressurizes, an open / close valve that can be manually switched on and off to keep the inside of the housing in a vacuum state, and a vacuum gauge that monitors the vacuum state inside the housing;
A simple airtightness testing machine characterized by comprising: The filter regulator for adjusting a compressed air pressure is further disposed between the coupler joint of the pipe line and the ejector type vacuum generator when the compressed air cannot be adjusted . Simple airtightness tester.

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