KR20030081702A - Apparatus to use air pressure testing for a tube - Google Patents

Abstract

PURPOSE: A tube pressure testing apparatus is provided to precisely perform a leakage test and an endurance test for a tube by using pneumatic pressure instead of hydraulic pressure. CONSTITUTION: A tube pressure testing apparatus includes a test air feeding section(100) and a pump(120) for compressing air fed from the test air feeding section(100). The pump is run by a pneumatic motor. A cooler(130) is provided to cool down the air compressed by the pump(120). A reservoir(140) is installed next to the cooler in order to temporarily store test air. A shutter(150) is provided next to the reservoir(140). A pressure control section(160) is provided to control pressure according to the amount of test air to be fed. A pressure detecting section(170) and a temperature detecting section(180) are installed next to the pressure control section(160). A test section(200) is provided to mount a tube on.

Description

Apparatus to use air pressure testing for a tube}

The present invention relates to a tube pressure test apparatus using the air pressure, and more particularly, the tube pressure using the air pressure to test the tube installed in the mechanical equipment with air pressure before its installation to determine the suitability for the use It relates to a test device.

In general, a variety of tubes are used in various mechanical equipment for the supply of hydraulic pressure and air pressure. These tubes are one of the most important components for driving the equipment on which they are installed.

Of these, the tube used in the aircraft has a direct effect on whether the aircraft is driven, but in particular, not only the operation of the aircraft but also directly affects the stability of the passengers aboard.

Therefore, it is most important that the various tubes used in the aircraft are subjected to strict durability test before use.

Meanwhile, the conventional tube test apparatus mainly uses a hydraulic test apparatus, which performs a pressure test on the tube at a pressure of about 8000 PSI.

However, since such a conventional tube test apparatus performs the test by hydraulic pressure, precise testing of very small fine holes is not properly performed. That is, more precise tests are not possible on the presence or absence of leakage of air particles that are much smaller than water particles.

The present invention is to solve the above-mentioned problems, an object of the present invention is to provide a tube pressure test apparatus using the air pressure to enable a test for more accurate leakage and durability than the air pressure test.

1 is a block diagram showing a tube pressure test apparatus according to the present invention.

2 is a piping diagram showing a tube pressure test apparatus according to the present invention.

** Description of the symbols for the main parts of the drawings **

100.Test air source

110.Drive air source

120 ... pump

130 ... Cooler

140 storage

150 ... pressure adjustment

200 ... Test

Tube test apparatus according to the present invention for achieving the above object is a pump; A test air supply source for supplying test air of a predetermined pressure to the pump; A cooler for cooling the test air compressed by the pump and discharged; Storage means for storing the test air that has passed through the cooling means; A pressure regulator for adjusting the pressure of the test air provided to the storage means; A pressure sensing unit for sensing a pressure state of the test air passing through the pressure regulator; And a test unit for performing a pressure test on the tube by the test air passing through the display unit.

And preferably, one side of the pump is characterized in that the drive air supply source for driving the pump to the air pressure is provided.

In addition, the storage means is provided with a storage tank for storing the test air, characterized in that the filter for filtering the test air circulated between the storage tank and the pressure regulator is characterized in that it is mounted.

In addition, preferably between the pressure sensing unit and the test unit is characterized in that the temperature sensing unit for detecting the temperature state of the test air supplied.

Hereinafter, a preferred embodiment of the tube pressure test apparatus using the air pressure according to the present invention will be described with reference to the drawings.

Tube pressure test apparatus using the air pressure according to the present invention is a test air supply source 100 for supplying test air to the tube to be tested at a predetermined pressure, as shown in Figure 1 and the air supplied from the test air source 100 It is provided with a pump 120 for compressing the supply.

The pump 120 is provided with a pneumatic motor operated by air supplied from a driving air source 110 provided separately from the test air source 100. After the pump 120, a cooler 130 that is compressed by the pump 120 to dissipate the compressed heat of the test air accompanying the heat of compression is installed, and after the cooler 130, the test air is temporarily provided. The storage unit 140 to be stored is provided.

And after the storage unit 140 is provided with an opening and closing unit 150 for opening and closing operation according to the presence or absence of the test air supply, the pressure for performing the pressure control for the supply state of the test air supplied after the opening and closing unit 150 The adjusting unit 160 is implemented. In addition, after the pressure adjusting unit 160, the pressure sensing unit 170 and the temperature sensing unit 180 are implemented, respectively, and a test unit 200 in which a tube for testing is mounted is provided at the end.

Referring to each of these configurations in more detail with reference to Figure 2, the test air source 100 first consists of two supply tanks 101, the first compressed air is stored to about 6000PSI. This is done by separately mounting a separate supply tank 101 on one side of the tube pressure test apparatus, and the supply pressure is set to 6250PSI by the relief valve 103. In addition, the driving air source 110 is also configured to supply the driving air from a separate source provided in the same manner.

After the test air source 100 and the drive air source 110, a filter 102 for filtering the air provided therefrom is mounted, and among these, the test air source 100 includes a pump ( It is connected to the air compression portion of the 120 and the driving air source 110 is connected to the drive portion of the pump 120.

Here, the driving air supply source 110 is configured to operate the various solenoid valves and the needle valves provided in the pressure test apparatus of the present invention together.

Next, the pump 120 operates by the driving air supply source 110 described above to supply the second compressed air supplied from the test air supply source 100 again. That is, the compressed air supplied from the test air supply source 100 at about 6250 PSI is supplied by secondary compression at about 10000 PSI.

The cooler 130 radiates the heat of compression generated when the air is secondly compressed from the pump 120 to supply air at a stable temperature. The cooler 130 is an air cooling method or a refrigerant cooling method. Etc. may be selectively applied.

Subsequently, after the cooler 130, the storage 140 for storing the air supplied through the cooler 130 is provided. The storage unit 140 is provided as a storage tank 141 in which the cooled air is stored after being compressed to 10000PSI through the pump 120 to supply the stored air when necessary by the operation of the opening and closing unit 150 to be described later.

In addition, another filter 142 is provided at the outlet side of the storage tank 141 to purify the test air that is finally supplied. After this filter 142, the test air is supplied from the storage tank 141. Opening and closing part 150 for determining whether or not is mounted. The opening and closing part 150 is composed of a pressure gauge 151 and a needle valve 152 installed in parallel in two branched paths.

Subsequently, the pressure adjusting unit 160 is provided on the downstream side of the opening / closing unit 150 and includes an automatic needle valve 162 which operates automatically with the air pressure provided through the solenoid 161. Therefore, the supply amount of the test air supplied from this automatic needle valve 162 is adjusted.

The pressure adjusting unit 160 is provided with another automatic needle valve 164 for releasing a part of the air when the air pressure of the air supplied to the downstream side of the automatic needle valve 162 is too high. The valve 164 is also driven by a separate solenoid 163.

A pressure sensing unit 170 is provided on the downstream side of the pressure adjusting unit 160. The pressure sensing unit 170 is composed of a pressure transducer 171 for converting the supply pressure of the supplied air into a voltage value, and an indicator 172 for displaying the pressure state in accordance with the voltage value. A recorder 190 for recording the pressure value indicated at 172 is mounted on one side.

In addition, the temperature sensing unit 180 installed on the downstream side of the pressure sensing unit 170 includes a temperature sensor 181 and a temperature indicator 182 displaying a value sensed by the temperature sensor 180, and finally, a test. The test unit 200 is connected to the tube 201 to be tested.

Hereinafter, the operation state of the tube pressure test apparatus using the air pressure according to the present invention configured as described above will be described.

Tube pressure test apparatus according to the present invention is connected to the supply tank 101, the primary compression separately from the outside at a pressure of about 6000PSI to one side, and the driving air for supplying air for driving to the other side of the device Source 110 is connected. The air supplied from each of these air sources 100 and 110 is purified by the filter 102 and then provided to the stationary pipe.

In other words, the test air source 100 is connected to the pump 120 via the filter 102, and the driving air source 110 is connected to the pump 120 and each other solenoid side. Accordingly, the pump 120 operates with the air pressure provided from the driving air source 110 to secondarily compress the test air provided from the test air source 100 to a pressure of approximately 10000 PSI.

The second test air compressed by the pump 120 passes through the cooler 130 again, and heats up the heat of compression generated when the pump 120 is compressed in the pump 120 to maintain a stable state. The air is first stored in the storage tank 141, and the low pressure in the storage tank 141 maintains a state of 10000 PSI, which is a compressed state in the pump.

When a pressure test is required in such a state, the test tube 200 is connected to the test tube 201, and the opening and closing unit 150 is opened to start supplying test air. At this time, the supplied test air is supplied while the pressure regulator 170 adjusts the provided pressure precisely, and the supplied test air is in the pressure state of the pressure sensing unit 170 and the temperature sensing unit 180. And a temperature condition are sensed and displayed externally through the indicators 172 and 182, and the record is also stored in the recorder 190.

On the other hand, the pressure regulator 160 and the automatic needle valves 162 and 164 for various other operations are all driven by the air provided from the driving air source 110, respectively for the control of the supplied air at this time Solenoids (161, 163) are mounted on the side. Therefore, each of the solenoids 161 and 163 is turned on / off according to the set operating state or the sensing state of the pressure gauge installed in each of the auto needle valves 162 and 164. This configuration is shown in more detail in the piping diagram of FIG. 2.

As described above, the tube pressure test apparatus using the air pressure of the present invention allows the pressure test on the tube to be carried out by air pressure, and a plurality of various safety devices and valve configurations and their operation for maintaining pressure and preventing backflow. There are a number of pressure gauges installed.

Unlike the embodiment of the present invention, even if the modified embodiment changes the configuration of the various valves shown in the piping state and the drawings, the pressure of the tube can be basically tested by air pressure, all including the technical idea of the present invention. All of them should be considered to be included in the technical scope of the present invention.

As described above, the tube pressure test apparatus according to the present invention enables the pressure test of tubes installed in various mechanical devices with secondary compressed air pressure to determine whether the tube leaks with a higher precision than that by the conventional hydraulic test. The test can be performed to obtain improved test reliability.

Claims (4)

Pump; A test air supply source for supplying test air of a predetermined pressure to the pump; A cooler for cooling the test air compressed by the pump and discharged; Storage means for storing the test air that has passed through the cooling means; A pressure regulator for adjusting the pressure of the test air provided to the storage means; A pressure sensing unit for sensing a pressure state of the test air passing through the pressure regulator; And a test unit configured to perform a pressure test on the tube by the test air passing through the display unit. The tube pressure test apparatus according to claim 1, wherein a driving air supply source for driving the pump to air pressure is provided at one side of the pump. The tube pressure test according to claim 1, wherein the storage means is provided as a storage tank in which test air is stored, and a filter for filtering test air circulated between the storage tank and the pressure regulator is mounted. Device. The tube pressure test apparatus according to claim 1, wherein a temperature sensing unit is provided between the pressure sensing unit and the test unit to sense a temperature state of the test air supplied.