WO2006041327A1

WO2006041327A1 - Self-contained device for product leakage testing

Info

Publication number: WO2006041327A1
Application number: PCT/RU2004/000398
Authority: WO
Inventors: Anatoly Nikolaevich Rakshin
Original assignee: Sergeev, Sergey Sergeevich
Priority date: 2004-10-11
Filing date: 2004-10-11
Publication date: 2006-04-20

Abstract

The invention relates to test engineering and can be used for product leakage testing. The inventive device comprises a pneumatic cylinder and a piston placed in a housing, a rod, an electronic programmable module, a screen, a control panel, a pressure sensor, a power supply, a rod lock embodied in the form of a spring-loaded arm which is fixed to the housing, pivotally fixed to the housing and interacts with the rod slots. Said invention makes it possible to input the test control parameters in the module program and automatically display the current parameters and a test result on the screen.

Description

Standalone device for leak testing

The invention relates to the field of testing and measuring equipment and can be used for leak testing.

There are various devices for testing products for leaks, including those containing a pneumatic cylinder with a plunger or piston (Russian patents 1780404, 2025681, 2097725, 2149371, US patents 3805594, 4590794, Non-destructive testing)), Volume 2, Moscow, (Engineering)) 2003).

Closest to the claimed device and selected for the prototype is a device for tightness control according to the application WO 98/48258, containing a pneumatic cylinder, a locking screw and a plunger with radial grooves and markings for recording its movement under its own weight.

The disadvantages of this device include low sensitivity to air leaks due to the low resolution of the marking on the plunger and the instability of the friction force, the inability to register the pressure created in the tested product, and the inconvenience of fixing the plunger due to the need to rotate the lock.

The purpose of the invention: increasing the sensitivity of the device to air leaks, increasing the information content of the test and the convenience of fixing the plunger.

This goal is achieved by the fact that the known device for testing products for leaks, containing a pneumatic cylinder, a plunger with radial grooves (or a plunger fastened to a rod having radial grooves), the latch is equipped with a pressure sensor in communication with the working cavity of the cylinder, an electric power source , an electronic programmable module, a control panel, a screen, made with the possibility of introducing test parameters into the program and automatically displaying the current param on the screen moat and test result and prisoners together with the cylinder and the plunger in the holder, the rod withdrawn outwardly, and the latch is designed as a spring-loaded plate is pivotally fastened in the cover ring and interacting with the control tappet and grooves on the stem.

In FIG. l shows a longitudinal section of the device, and in Fig. 2 a cross section of the cover with locking elements.

The device contains a cylinder 1 with a seal 2, a plunger 3, fastened to a stem 4, on which radial grooves 5 and b are made, an electronic programmable module 7, a control panel 8 with buttons 9, a screen 10, a pressure sensor 11, connected by a tube 12 with a working cavity shevmotsilindra, power source 13, wallpaper

Replacement sheet mu 14 with a cover 15 and the fixing elements located in the cover (see Fig. 2): latch 16, axis 17, spring 18, control pusher 19. The power source, module, sensor, remote control and screen are electrically connected to each other in a corresponding way with wires, not indicated in FIG. A fitting 20 is screwed through the hole in the holder into the ishevmo-cylinder, which allows the tested product to communicate with the working cavity of the pneumatic cylinder.

The device operates as follows. When sequentially pressing the corresponding buttons on the control panel 8, the device is supplied with electric voltage from the power source 13, and the test parameters corresponding to the tightness criterion of the tested product are introduced into the program of module 7, for example, the allowable pressure decrease in the product ΔР for a set period of time T. Press on the control pusher 19, under the action of which the latch 16 rotates around the axis 17, leaves the radial groove 5 on the rod 4 and releases it, while compressing Spring 18 is supplied. The rod with the plunger 3 is raised to the upper position until the groove 6 is aligned with the latch 16, the latter enters the groove on the rod under the action of the compressed spring, fixing it and the plunger in the upper position. After communication of the test product with the working cavity of the pneumatic cylinder through the nozzle 20, the rod 4 with the plunger 3 is moved and fixed in the lower position,

Replacement sheet depicted in FIG. 1, thereby creating an excess air pressure in the working cavity of the pneumatic cylinder and the tested product, which is sensed by the pressure sensor 11 through the tube 12. The signal from the sensor in the form of a voltage proportional to the pressure is fed to the input of the electronic programmable module 7, and when the corresponding commands from the control panel 8 the device starts to work automatically according to the following algorithm: the signal from the sensor is converted to pressure, displayed on the screen and compared with the originally measured, moreover, if the current pressure is less than the initial pressure by ΔР, entered into the program as a criterion for the tightness of the product, then the screen displays a negative test result, for example, the word "leaky", but if the tightness criterion is fulfilled for a set time T, the screen displays positive product test result.

In accordance with the description made a sample device, the test results of which confirmed the achievement of the purpose of the invention.

Claims

CLAIM

Autonomous device for testing the product for leaks, containing a pneumatic cylinder with a plunger, a rod with radial grooves fastened to the plunger, a rod clamp, characterized in that it is equipped with a pressure sensor in communication with the pneumatic cylinder’s working cavity, a channel, an electric power source and an electronic programmable module configured to introducing into his program using the control panel the test control parameters and automatically display on the screen the current parameters and the test result In this case, the pressure sensor, the power supply, and the electronic module together with the pneumatic cylinder and plunger are installed in a cage having a cover through which the rod is passed, and the latch is made in the form of a spring-loaded plate pivotally mounted in the cover and interacting with grooves on the rod and with movable a pusher installed in the cover, one end of which is brought out.

imputing sheet