SU1221577A1 - Magnetic-field flaw detector - Google Patents

Abstract

The invention relates to the field of non-destructive testing and can be used to detect the discontinuity of metal products by the magnet-powder method in all areas of mechanical engineering. The purpose of the invention is to increase the reliability and performance of control due to the fact that the flaw detector is equipped with a tank for air separation, located above the watering line of parts and connected in this part to the suspension supply line, an excess suspension drain line connected to the upper part of the tank, in which air outlet from the suspension. The watering line for parts is connected to the bottom of the tank and is designed as a knee with a metering valve installed at the knee bend below the level of the output end of the irrigation line, which ensures instant suspension and suspension of the suspension to the controlled part. 1 il. g (L

Description

one

The invention relates to non-explosive control and can be used to detect violations; the continuity of metal products by the magnetic powder method in all areas of engineering.

The purpose of the invention is to increase the reliability and performance of the control.

The drawing shows a diagram of the main nodes of the flaw detector.

The magnetic flaw detector contains a magnetizing unit 1, a tank 2 for suspensions, a tank 3 for separating air, and a irrigation line 4. The tank 2 contains a centrifugal pump 5, on the shaft of which the impeller 6 is rigidly fixed to inject the suspension and the impeller 7 for mixing the suspension in the tank 2. The tank 3 for separating air is installed above the tank 2 above the irrigation zone of the parts and is made in the form of a tank with a lower taper part. At the bottom of the tank 3 is connected to the suspension supply line 8, which goes from the tank 2. In the upper part of the tank 3 there is a drain 9, drainage of excess suspension, which is lowered into the tank 2 and the air outlet opening 4 of the parts irrigation 4 goes to the bottom of the tank 3 and is complete in the form of a knee, the lower portion of which is located below the irrigation zone and is equipped with a metering valve 10. The valve 10 is installed in the housing 11 on the rod 12, which is spring-loaded relative to the housing 11 by the spring 13 and through the roller 14 interacts with the rod 15, one end of which It is fixed in the housing 11 on the axis 16, and the other is connected to the core 17 of the electromagnet 18. At the end of the irrigation main 4 there is a sprinkler 19. Under the part magnetizing section 1

Collection 20 with a funnel, going to the tank 2.45. The formation of bubbles on the surface The defectoscope works as follows.

Watering parts is carried out simultaneously with their magnetization.

When the pump is turned on, the impellers 6 and 7 begin to rotate. The impeller 7 mixes the powder, ensuring its uniform distribution in the slurry. With the help of the impeller 6, the suspension is supplied via a line 8 supplying the suspension to the tank 3 for air separation. In the tank 3 air bubbles rise and exit through

 , ten

2215772

hole in the top of the tank. (Jyc-Penzi under the force of gravity enters the trunk 4 irrigation parts. When the electromagnet 18 ser5 is turned on, the summer cotter 17 pulls inward, lifting the end of the rod 15 fixed on it, which in turn, interacting with the rod 12, raises the valve 10 the opening for the passage of the suspension. The suspension enters the magnetized part. After irrigation of the parts, the electromagnet 18 is turned off, the core 17 is lowered under its own weight, while lowering

 5 rod 15. The spring 13 returns the valve 10 to the original position, closing the access of the suspension. In this case, part of the suspension remains in the irrigation line after; valve, in the second branch of the knee.

20 Last €; stopping the watering of the part, the suspension flows down into it and through the collector 20 enters the tank 2. After this, the part is magnetized for some time, and after the magnetization stops, its inspection is carried out. The pump runs continuously during part control. The excess suspension formed in the tank 3 at the time of inspecting the part, when the irrigation main is blocked, enters through the drain 9 of the excess suspension back into the tank 2. Throughout the entire operation of the flaw detector, the suspension is circulated continuously. The operation of the device prevents the entry of air bubbles on the controlled part, and the air from the suspension enters an additional tank. The suspension is supplied to the controlled part not under the pressure created by the pump, but comes from the tank to separate the air under the action of gravity, as the pressure of the liquid at the time of irrigation decreases. This excludes the image.

thirty

35

40

hoists and washout of magnetic powder from defective places. The presence of an air separation tank makes it possible to combine the operations of stirring and supplying the suspension. Performing the irrigation line in the form of a knee, fitted with a valve, provides for a constant filling of the irrigation line with the suspension, as a result of which instantaneous flow and suspension of the supply of the suspension to the controlled detail is carried out.

Claims (1)

Invention Formula A magnetic flaw detector containing a magnetizing unit, a suspension supply line including a tank with a pump for stirring and supplying a suspension, and a part watering line, characterized in that, in order to increase the reliability and performance of the control, it is equipped with an air separation tank located above the line watering de21577 hoists, connected at the bottom of the suspension supply line, master. By dumping an excess of suspension connected to the upper part of the tank for separating air, in which an opening is made for air to escape from the suspension, and the watering line for parts is connected to the lower part of the tank and made in the form of a knee, with a metering valve, installed at the knee break point below the level of the output end of the irrigation main. -nineteen / Compiled A, Bodrov Editor M. Dylyn Tehred V. Kadar Proofreader Order 1607/51 Circulation 778 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Branch GShP Patent, Uzhgorod, Proektna St., 4