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The principle of operation of the magnetization device: The device consists of two compact blocks made of non-magnetic material connected by a flexible magnetic circuit. In each block there is a permanent magnet made of neodymium-iron-boron alloy (Ne-Fe-B). When installing the blocks on the surface of the part, a closed magnetic circuit is formed with the direction of the magnetizing field from one pole to the other. Above the defect scattering fields, magnetic powder particles are deposited to form an indicator pattern. Design features and advantages of the device for magnetic particle control UN-5 The delivery package with the device includes a portable case, an inter-pole jumper installed during transportation, and a liner for fixing blocks with permanent magnets. The UN-5 portable device does not require electrical power and therefore can be used where the supply of stationary power is difficult or impossible under regulatory documents: in the field, when working at height, for inspection of capacitive equipment operating under pressure, etc. - The device is easy to use, lightweight and small-sized, working with it does not require special physical and technical training from the operator; - Flexible magnetic core allows you to use the device to control parts of complex shape; - The UN-5 magnetizing device is distinguished by an increased quality of the indicator pattern and an increased control zone due to a reduced uncontrolled zone near the poles and an improved ratio of the normal and tangential components of the magnetic field (Russian patent No. 60732); - The technical characteristics of the device comply with Russian and foreign regulatory documents, this being the reason of its widespread use in more than 40 countries, including Germany, France, Brazil and Norway. When monitoring, the controlled area is the central part of the area located between the magnetic poles of the device. The width of the monitored area is determined by the width of the magnetic poles of the device and is approximately 60 mm. The length of the monitored section depends on the inter-pole distance. the dimensions of the controlled area are given depending on the device's inter-pole distance: Inter-pole distance, mm 95: 75 55 Controlled area between the working poles, mm: 60x60 40x60 25x55 The length of the defect detection zone depends on the distance established between the working poles of the magnet on the controlled product. Defects are not detected in the areas adjacent to the poles of the magnet. The length of these sections is 18 mm with an interpolar distance of 95 and 75 mm. With an interpolar distance of 55 mm these sections are 13 mm long. Scope of application: Magnetizing devices for magnetic powder flaw detection are used in many industries, including railway, water and aviation transport, in the construction and operation of pipelines, in chemical and petrochemical production. The flexible link between the magnetic blocks allows the control of products of complex shape, for example, cylindrical tanks, high-pressure apparatuses, main pipelines, etc. When checking for defects, the device can be used together with other auxiliary equipment for: - preliminary and subsequent demagnetization; - application of a magnetic indicator (which can be dry or in the form of an emulsion); - magnetoluminescent control (with ultraviolet lamps).

The principle of operation of the magnetic particle flaw detector: The device provides monitoring and detection of surface defects by the applied field method or by the residual magnetization method. The kit with the device includes power cables, remote solenoids, and an electromagnet, with which you can produce longitudinal or circular magnetization of the part. A trolley is provided for the transportation of technical equipment and the detection of defects in the field. Magnetization is carried out by alternating, direct or pulsed current of large magnitude, due to which high values of the magnetizing field strength are achieved. Features and advantages of the UNM-300/2000 magnetic powder control device: Microprocessor control, which allows you to memorize and accurately reproduce the desired modes and selected measurement parameters, as well as work as part of automated stands and control systems; The magnetizing device has a digital indicator on the front side and a control panel for selecting the operating mode, type and current strength; Automatic recognition of the type of connected external magnetizing device; Device temperature control and automatic shutdown in case of overheating; Remote connected magnetization devices allow you to control the quality of parts and assemblies of complex shape; Automatic demagnetization of controlled assemblies and parts; The equipment meets the requirements of the following standards: GOST R 56512-2015, GOST R 53700-2009 (ISO 9934-3:2002), GOST R 50.05.06-2018, GOST R ISO 10893-5-2016, GOST ISO 17638-2018, RD 34.17.102-88 and RD-13-05-2006; Devices of the MANUL series (UNM-300/2000 and others) are approved for use by the Russian Railways. Scope of application: Magnetic particle flaw detection is indispensable where quality control of various critical and loaded assemblies and parts is required, detection of surface defects that occur during their production, storage and operation. The device may be in demand: at factories for the production and repair of automotive, aviation and railway equipment, metro enterprises, military-industrial complex (inspection of shafts, axles, wheel pairs, pistons, beams, springs, etc.); in civil and military shipbuilding, elevator and crane enterprises (control of rigging equipment, hooks, etc.); at pipe rolling plants (determination of defects in rolled products); in the oil and gas, chemical industry (inspection of welds of equipment operating under pressure). The UNM-300/2000 portable magnetic particle flaw detector has a relatively small weight and dimensions, which allow it to be used as a stationary or portable device in specialized quality control laboratories or in ordinary workshops, garages, hangars, locomotive depots or warehouses. The UNM 300/2000 device, as well as other means of magnetic powder control, are normally used together with auxiliary equipment for the preparation and application of magnetic powder (suspension), for fixing the indicator pattern, magnetometers for determining residual magnetization, visual inspection means – magnifiers and endoscopes, as well as with ultraviolet irradiators in the case of fluorescent powders. Technical specifications Magnetization currents Variable, Pulse, Rectified (only for solenoid and electromagnet) The measurement error of the magnetization current is no more than 10%. characteristics of the pulse current The repetition frequency of unipolar current pulses during magnetization and of multipolar current pulses during demagnetization is (2 ± 0.2) Hz. The duration of the current pulses is at least 1.5 ms. Magnetic characteristics of the solenoid The maximum alternating magnetic field in the center of a single solenoid is at least 100 A/cm. The maximum alternating magnetic field on the axis in the center between two solenoids located at a distance of 200 mm is at least 60 A/cm. The maximum permanent magnetic field in the center of a single solenoid is at least 80 A/cm. The maximum permanent magnetic field on the axis in the center between two solenoids located at a distance of 200 mm is at least 50 A/cm. Values of magnetization currents The maximum alternating magnetization current in the unwound cable 6 m × 50 mm2 and on the electrical contacts is at least 1000 A. The maximum pulse magnetization current in an unwound cable of 4 m × 10 mm2 and on electrical contacts is at least 2000 A. The current adjustment range in the solenoids and the electromagnet is from 0.5 to 4.5 A. Characteristics of the electromagnet The maximum alternating magnetic field in the air gap of the electromagnet depending on the interpolar distance is as follows: - in the 140 mm gap: at least 75 A/cm; - in the 40 mm gap: at least 300 A/cm. The maximum constant magnetic field in the air gap of the electromagnet depending on the interpolar distance is as follows: - in the 140 mm gap: at least 100 A/cm; - in the 40 mm gap: at least 400 A/cm. Operating mode The operating mode is cyclic: magnetization/pause. The magnetization time is adjustable from 1 to 40 s. The demagnetization time is adjustable from 5 to 60 seconds. Demagnetization of details is performed automatically. The time of setting the operating mode is no more than 15 seconds. The duration of continuous operation is at least 8 hours. Power supply parameters The device is powered by an alternating current network with a voltage of 220 V and a frequency of 50 Hz. The power consumed from the network is no more than 5 kVA. weight and size characteristics Overall dimensions of the device (w × h × d) – no more than 267×245×465 mm. The weight of the device is not more than 50 kg. Other characteristics The average worktime before failure is at least 12500 hours. The average recovery time is no more than 6 hours. The average service life of the device is at least 10 years. Compliance with standards The device fully complies with the requirements of GOST R 56512-2015, GOST R 53700-2009 (ISO 9934-3:2002), GOST R 50.05.06-2018, GOST R ISO 10893-5-2016, GOST ISO 17638-2018, RD 34.17.102-88 and RD-13-05-2006 in terms of the requirements for magnetizing devices and magnetic particle flaw detectors. Identification of the load. It performs automatic identification of the types of connected load: cables, solenoids and electromagnet. Control of the connected load current It allows you to control the current of the connected AC/DC electromagnets and solenoids.