RU993719C - Device for radiation defectoscopy - Google Patents

Description

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The invention relates to devices for the inspection of cylindrical articles, in particular welded pipes, and can be used in the energy and chemical industries for control during assembly and, especially, repair work,

A device for monitoring pipes is known, which contains a source unit and a recorder. A disadvantage of this device is the poor quality of monitoring objects located in areas with a high radiation background, which is caused by veiling the received images with background radiation - The closest to the proposed technical essence is radiation defectoscopy, containing a source unit installed on movable UITBHrax and a register unit that has magazines installed in the case for storing unexposed and exposed X-ray cassettes, a cassette holder, a mechanism for moving cassettes from a magazine for storing unexposed cassettes to a cassette holder and from a cassette holder to a magazine for storing exposed cassettes, rotary protective covers. The disadvantage of the prototype of the test suite is the poor quality of control of objects located in hard-to-reach places with a radiation background, which is due to the considerable time of the background / radiation on the film and the inaccuracy of the source and foam in the control zone. The aim of the invention is to improve the quality of control of objects located in difficult-to-stupid places with a radiation background.

This goal is achieved by the fact that the device for radiation flaw detection contains more. mounted on movable rods the source unit ;;; a and the registration unit, which is installed in the case of stores for storing unexposed to the exposed x-ray cassettes, kssederlozhstel, the mechanism for moving the cassettes from the i-shop to the faience and unexposed: and with the tool and the cassette From the storehouse store there is a store for the storage of the exposed cassettes, rotating protective buttons. a magazine for storing non-explosive cassettes is located in the upper part of the body of the recording unit, the cassette holder is located between the indicated magazines and is equipped with a curved guide and a spinner for feeding the cassettes into the control zone, rotary protective shutters are installed in the lower part;

the magazine for storing unexposed cassettes and in the upper part of the magazine for storing the exposed cassettes, the cassettes are provided with pairs of rollers in pairs in the upper and lower parts of each cassette on its opposite sides, interacting with the curved direction of the cassette holder when the cassettes are moved, and the Kaccet interchange mechanism has dual pneumatic cylinders. one-way clutches, a rack-and-pinion mechanism, a pair of cranks and two shafts are made in the form of pairs of supporting stationary and movable combs, connected through a pair of swivels to shafts symmetrically mounted relative to the cassette holder on one side in the store for storing unexposed cassettes, on the other hand, in the U-shop for storage of exposed ksset, with the shafts kinematically connected through one-way clutches and a rack-and-pinion mechanism with moving sources of pneumatic cylinders.

Figure 1 shows the proposed device, a General view; figure 2 - section aa on FMG.1; on fig.Z - section BB in figure 1; figure 4 - section bb In fig.Z; on ft.5 reyrez G-G on fig.Z: on 6 - node I on srig.Z; figure 7 - section dd in figure 6; Fig, 8 - gear reducer; figure 9 is a common device in isorometry.

The device contains a tripod 1, a source unit 2, a recording unit 3, an ampullopair 4 .. endoscope 5 for observation. The registration unit contains a cassette holder 6 with about 7 exposure windows, a magazine 8 for heneniye of unexposed cassettes 9 with a photogeneral film. Matasin 10 is designed to store exposed cassettes. Each agazin is equipped with a valve 11.

The mechanism for moving the cassettes consists of two fixed combs 12 fixed to the side walls of the casing, PL-IX Units cassettes, two movable combs 13, ycTaMoa.rjeHHbix on cranks 14, on shafts 15 of which there are 16 one-way clutches with gear rims hooked on slats, cut on the rods 17 dual pneumatic cylinders 18. The shafts are installed symmetrically with respect to the cassette holder. on the one hand, in the case of the store for storing unexposed cassettes, and on the other hand, in the store for storing exhibited cassettes. The cassette is a metal box with an ohm.) Ml ml ng) on the front side 8 of its upper member n.

installed a pair of rollers 19, in the lower part - another pair of rollers 20.

A cassette holder with an exposure window is attached to the cassette magazine at the bottom. It is made in the form of a closed case, on the front side there are two curtains (not shown in the drawings) with rails attached to them (not shown in the drawings) that engage with gear wheels (not shown in the drawings) that are in engagement with the rails, cut on the rods of pneumatic cylinders (not shown in the drawings). On the side inner walls of the cassette holder, the spinners 21 are seated on the axles and guides 22 and 23 are installed. Between the cassette magazine and the cassette holder, an upper pivotal protective flap 24 is installed, on one of the rollers of which the gear 25 is rigidly fixed, engaging with the rail cut on the rod 26 of the pneumatic cylinder 27. Between the cassette holder and the magazine for storing the exposed cassettes, there is also installed a pivoting protective flap 28, which is similar in design to the upper one.

The tripod has two movable rods 29 with a screw thread, two gear nuts 30, a gear reducer 31 with an electric motor 32 and a feed rod 33. The drawing also shows the controlled article 34,

The device works as follows. In the zone without background radiation, manually slide the valve 11 in the store 8 for storing the cassettes 9 and place the cassette 9 on the first position of the stationary combs 12. Then compressed air is fed into the dual air cylinders 18, the rods 17 of which are turned out by the yoke 16 cranks 14. The cranks 14 rotate the movable combs 13, which move the cassette 9 to the next position of the fixed comb 12. Thus, all positions are filled with the cassettes 9. Then compressed air is fed into the pneumatic cylinder 27, the rod 26 of which rotates the flap 24. The front cassette 9 under its own weight along the guides falls into the cassette holder 6. The lower rollers 20 of the cassette 9 pass along the open guide 22, press the bottom of the spinner 21 and turn it to another position. The pinwheel 21 opens the cassette access to the guide 23, through which the

the upper cassette rollers 19, and presses it against the window 7, providing the smallest gap between the film and the product 34. moreover, the upper rollers 19 return the spinner 21 to its original position. Another photo cassette 9 is placed in the vacant position in the store B. Close the valve 11. The device is prepared for control, then the device with tripod 1 is brought to the controlled product 34. The electric motor 32 is turned on, gear nuts 30 are rotated by gear reducer 31, which move two movable rods 29. Inspecting the outer surface of the product 34 into the endoscope 5, stop the exposure window 7 of the cassette holder 9 in front of the test object, for example, a weld. The ampoule 4 introduces the ampoule of the radioactive drug into the source 2 unit.

Remotely with the help of pneumatic automation and a rack-and-pinion mechanism, the curtains are moved apart and the exposure window 7 is opened. At the end of the exposure, the curtains are closed. If necessary, the ampoule of a radioactive drug through the ampoule 4 is returned to the container. Then the rod 26 of the pneumatic cylinder 27 rotates the flap 28. After that, the cartridge 9 under its own weight falls onto the stationary comb 12 of the magazine 10, Then with the help of the stem 26 of the pneumatic cylinder 27 rotates the protective flap 24, the cartridge 9 under its own weight falls into the cassette holder 6. Then compressed air is fed in dual pneumatic cylinders 18 and move the cartridge 9 to the following positions in both stores. The device is ready to control the next object. After all the films in the radiation-free background area have been removed, the valve 11 is pushed in and, just as the cassettes 9 were installed in the store 8, they were taken out

The use of this device allows to improve the quality of control by ensuring the accuracy of the installation of the device relative to the object of control in hard-to-reach places with a radiation background and by reducing the effect of background radiation on the resulting images. (56) Patent of Great Britain No. 1272404, cl. GDI N23 / 04, 1972.

Mayorov A.P., Mamikon S.V., Kosarev L.I. and Firstov V.G. Radiopzotope flaw detection, M .: Atomizdat, 1976, p. 107-109.

Claims (1)

Invention Formula VCTPOt / lCTBO FOR RADIATION TESTING comprising mounted on movable bars source unit and the recording unit having installed in shops housing for storing unexposed and exposed cassette with X-ray film, the cassette, mechanism moving the cassettes from the magazine for storing unexposed cassettes in kassatoderzhatel of the cassette - to store the exposed cassettes, rotary protective shutters, characterized in that, in order to increase the quality of control of objects, located in hard-to-reach places with a radiation background, the store for storing unexposed cassettes is located in the upper part of the housing of the registration unit, the cassette holder is located between the indicated stores and is equipped with a curved guide and a turntable for feeding the cassettes into the control zone, rotatable protective layers are installed at the bottom a magazine for storage of unexposed cassettes and in the upper part of a magazine for storage of exposed cassettes, the cash registers are provided in pairs located in the upper and lower parts of the cassette on opposite faces of the rollers, cooperating with a curved guide yuschey1 ivertushkoy when moving the cassette tapes, and a mechanism moving the cassette has dvoennye cylinders. one-way clutches, rack-and-pinion gear (—a hand, a pair of cranks and two shafts and made in the form of pairs of supporting fixed and movable combs, connected through a pair of cranks to shafts symmetrically installed relative to the cassette holder on one side in the store for storing unexposed cassettes, and on the other - in the store for storing the exposed cassettes, with the shafts kinematically connected 5 Xena through one-way clutches and gear-rack mechanism with movable rods of pneumatic cylinders, -BUT fig.Z nineteen fie.Ch fi.5 I 7 12 NXV4NXV4 4NX44 N X V) ig7 %