The automatic production line of fuel cladding

 

(57) Abstract:

The invention relates to nuclear energy and may find application in the manufacture of shells of fuel elements for nuclear reactors. The technical result of the invention is to increase the yield of the membranes and reduce their cost of production by eliminating the mechanism of wet cleaning. Drive axial reciprocating movement of the mechanisms segments of the tube with the two sides in the size of the shell and the drive axial reciprocating movement of the calibration mechanism one end of the tube is made in the form of pneumatic cylinders, communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air, clamps fastening the tube to the inclined rack table, cutting cutters shaped cutters, the ejector tube-shell from the position of the segments, movable stop mechanism to control the length of the tube-shell, collet clamping mechanism, calibration rod, mechanism mounting bracket into the grooved end of the tube-shell, the mechanism of alignment of the ends of the shells. The Stripping mechanism of the weld and the mechanism of ultrasonic testing of the weld is supplied by a pneumatic cylinder, with the Chi compressed air, the control mechanisms of the length of the tube-shell, calibration rod of one window of the tube-shell, mounting bracket into the grooved end of the tube-shell, weighing tube-shell with cork, the alignment of the ends of the shells, cleaning and ultrasonic weld control is equipped with ejectors with air cylinder is communicated through pneumatocele, pneumatic and blocks with pneumatic compressor station compressed air. The control mechanism of the length of the tube-shell provided with a block matching display, automatic control system and setting. The weighing mechanism of the shell is equipped with automatic control system, electronic computing machine and removal of the overlay, the cleaning mechanism of the inner and outer surfaces of the tube-shell combined with a cutting device for internal cleaning used coaxial tube is placed a hollow rod of the air cylinder is communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air and used to clean the outside channel of the input compressed air in stock, which is built on a tangent to the channel occupancy of the tube shell. 1 C.p. f-crystals, 10 the EC fuel elements (FE) for a nuclear reactor.

Known automatic production line sheath of a fuel rod for a nuclear reactor containing the tilt table, along which technological sequence posted by mechanisms: pieces of tubing in the size of the shell, control the length of the membrane in the form of rolling in the axial direction and fixed stops with sensors, calibration of end of the shell, clean the outer and inner surfaces of the shells, pulling plugs in one end of the shell, weighing, and installation of electron-beam welding the caps to the shell with continuous loading and unloading of membranes (see Russian Federation patent RU 2084026 C1 from 06.10.94, published 10.07.97,, IPC 6 G 21 21/02 "Method of manufacturing the fuel cladding and automatic line for its implementation). In the description and formula of the patent RU 2084026 C1 laid wet cleaning of the outer and inner surfaces of the shells, including baths, degreasing, rinsing, and drying of the outer and inner surfaces of the shells with the mechanisms of the rotary lever move the shells from the bath into the tub, installed after the first inclined table. During wet cleaning of the tube-shell immersed in a degreasing, washing, rinsing solutions and subjected to drying, however, prna surface. If downloading such a fuel rod in the fuel Assembly (FA) in a nuclear reactor moisture on the inner surface will evaporate, resulting in the interaction of zirconium alloy shell with water (steam) at high temperatures, the shell oxidized with the formation on the inner surface of oxide films, and there will be absorption with the advent of the hydride phase, deteriorating plastic properties of zirconium shell (see "Development, production and operation of fuel cell power reactors", book 1, edited by F. G. Reshetnikov, M., Energoatomizdat., 1995, pp. 158-160).

It is known that the corrosion rate of an alloy of zirconium increases in superheated steam, bringing it (alloy) unusable (see "the metallurgy of zirconium". Translation from English. Publishing house of foreign literature. M., 1959, page 345).

In the known patent in baths to clean internal and external surfaces using a rotary-lever mechanisms for moving the shells from the bath into the tub that does not exclude for mass production of shells of their fall, skew and output in the marriage due to kinks, etc.

In addition, when welding the caps to the shell with signs of moisture in unwisely the patent does not fully characterize the mechanisms of production of membranes for fuel element.

The closest in technical essence and the most similar features with the claimed line is an automatic production line of fuel cladding containing an inclined rack table, along which technological order is placed: the mechanism of the pieces of tubing with two parties in the amount of membrane for fuel element with rotational drive and axial reciprocating movement with shaped cutters chamfering two sides of the tube-shell, positioned relative to the cutting cutters on the offset trajectories of rotation, with collets, the rods are channels of compressed air into the cutting zone on both sides of the tube-shell, with the clamps fastening the tube to the inclined rack table at the time segments of the tube in the amount of membrane for a fuel rod that combines the ejector and scat with work surfaces coated with a polymer material, made on the rotary shaft and provided with sensors control the operation of the clamp, with stops along the layout axis of the tube at the position of the segments, limiting the swing motion mechanisms pieces of tubing with the distance between them defining a given length of the tube-shell,

the milling is>/BR>- calibration mechanism rod one end of the tube-shell driven axial reciprocating movement, the tapered collet holder clip, coaxially located relative to the piston rod placed inside a "floating" tilting Cams with a spherical outer surface,

- cleaning mechanism of the inner and outer surfaces of the tube-shell,

- mechanism mounting bracket into the grooved end of the tube-shell,

the mechanism of the weighing tube-shell with sealed cover,

- installation of electron-beam welding pressed caps to the shell,

the mechanism of alignment of the ends of the shell,

- the mechanism of Stripping weld

the mechanism of ultrasonic testing of the weld and means posting the piece tube-shell from mechanism to mechanism (see Patent RU, 2145449, the application 97118139/06 (019213) from 30.10.97, IPC 6 G 21 21/02 "the Automatic production line of fuel elements), where the automatic production line sheath of a fuel rod is an integral part of automatic lines for manufacturing fuel elements.

In line prototype as well as in line-analog, embedded wet scrubbing the inner and outer poverhnostyah amounts of reactants, increasing the cost of manufacture of shells. In line prototype and in line equivalent is not disclosed to the automation system, allowing the lines to operate in automatic mode. In line prototype cooling cutters and Stripping chip is solved by performing in the stocks channels of compressed air in the cutting zone on both sides of the tube shell. When laminar flow of compressed air is partially solved dry cleaning of the outer surface of the tube-shell, but the inside is dry cleaning is missing, that does not preclude ingestion of a tube-shell, sawdust, shavings, which can be embedded in the body of the shell on the calibration operation and to cause the shell to marriage. Marriage can lead to the ingress of oil from the hydraulic automatics on the outer and on the inner surface of the tube shell in the process of its production.

Oil leads welded seam shell bracket to the marriage of porosity due to the decomposition of oil and gas.

For position measurement, the length of the tube-shell, in case of discrepancy of its length to a given length, the tube-shell will be rejected, but the arrival of the next tube-shells, the length of which does not correspond to a given length, b is the position of the weighing tube-shell, in case of discrepancy of its specified weight, tube-shell will be rejected, but when entering the next tube-shells, the weight of which does not match the given weight, there will be an accumulation of marriage, which reduces the yield of the tubing-casing.

An object of the invention is to increase the yield of the membranes and reduce their cost of production by eliminating the mechanism of wet cleaning.

This technical problem is solved in that in the automatic production line of fuel cladding containing an inclined rack table, along which technological sequence posted:

the mechanism for cutting the tube with the two parties in the amount of membrane for fuel element with rotational drive and axial reciprocating movement with shaped cutters chamfering two sides of the tube-shell, positioned relative to the cutting cutters on the offset trajectories of rotation, with collets, the rods are channels of compressed air into the cutting zone on both sides of the tube-shell, with clamps fastening the tube to the inclined rack table at the time segments of the tube in the size of the shell for theprovides is the Rial, performed on the rotary shaft and provided with sensors control the operation of the clamp with stops along the layout axis of the tube at the position of the segments, limiting the swing motion mechanisms pieces of tubing with the distance between them defining a given length of the tube-shell,

- the mechanism of control of the length of the tube shell in the form of immovable in the axial direction and rolling stops with sensors

- calibration mechanism rod one end of the tube-shell driven axial reciprocating movement, the tapered collet holder clip, coaxially located relative to Stoke placed inside a "floating" tilting Cams with a spherical outer surface,

- cleaning mechanism of the inner and outer surfaces of the tube-shell,

- mechanism mounting bracket into the grooved end of the tube-shell,

the mechanism of the weighing tube-shell with sealed cover,

- installation of electron-beam welding pressed caps to the shell,

the mechanism of alignment of the ends of the shell,

- the mechanism of Stripping weld

the mechanism of ultrasonic weld inspection tools and wiring tube-shell, and wpos the CSO movement mechanisms segments of the tube with the two sides in the size of the shell and the drive axial reciprocating movement of the calibration mechanism one end of the tube is made in the form of pneumatic cylinders, communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air, clamps fastening the tube to the inclined rack table, cutting cutters shaped cutters, the ejector tube-shell from the position of the segments, movable stop mechanism to control the length of the tube-shell, collet clamping mechanism, calibration rod, mechanism mounting bracket into the grooved end of the tube-shell, the mechanism of alignment of the ends of the shells, the Stripping mechanism of the weld and the mechanism of ultrasonic testing of the weld is supplied by a pneumatic cylinder provided through pneumatocele, pneumatic and blocks with pneumatic compressor station compressed air,

the control mechanisms of the length of the tube-shell, calibration rod one end of the tube-shell, mounting bracket into the grooved end of the tube-shell, weighing tube-shell with cork, the alignment of the ends of the shells, cleaning and ultrasonic weld control is equipped with ejectors with air cylinders, communicated through pneumatocele, pneumatic and blocks with pneumatic compressor station compressed air, the control mechanism dlinnye, the weighing mechanism of the shell is equipped with automatic control system, electronic computing machine and removal of the overlay, the cleaning mechanism of the inner and outer surface of the tube shell is combined with a cutting device for internal cleaning used coaxial tube is placed a hollow rod of the air cylinder is communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air and used to clean the outside channel of the input compressed air in stock, which is built on a tangent to the channel occupancy of a tube-shell.

Another difference is that the pneumatic feed of the cutting and shaped cutters equipped with pneumocytes in the form of pneumatic cylinders.

The translation work of all mechanisms and tools wiring tube-shell, and later the membrane from mechanism to mechanism for pneumatic systems will allow to exclude contamination of the tube-shell oil and liquid.

The combination of the cleaning mechanism of the inner and outer surface of the tube-shell mechanism cuts in the size of the shell and run the dry cleaning by centrifugal rotation of the compressed air around the purified t is gathogo air inside the tube through the hollow rod of the pneumatic cylinder will exclude the mechanism of wet cleaning of the tube-shell line to reduce the Prime cost of manufacture of the shells.

A supply mechanism for measuring the length of the tube-shell, and mechanism for weighting shell automatic control system that automatically disconnect the line if even a single occurrence of the marriage, the length and weight can eliminate the build-up of the marriage.

In General, the proposed solution allows to increase the yield of membranes for fuel elements, to eliminate samosohranenie shells on the handling mechanisms, to exclude the mechanism of wet cleaning, chemicals and reagents used in wet cleaning and to reduce the cost of manufacture of the shells.

The drawings show the automatic production line of fuel cladding, where

in Fig.1 - automatic production line shell TVEL,

in Fig. 2 is a pneumatic diagram of the automatic production line of shell TVEL,

in Fig.3 - the mechanism of dry cleaning the inner surface of the shell of a fuel rod,

in Fig.4 - mechanism of tube segments in the size of the shell with a mechanism for cleaning the outer surface of the shell of a fuel rod,

in Fig.5 - clip fastener to the inclined tube rack table,

in Fig.6 - ejector TRU the mA automatic control mechanism to control the length,

in Fig.9 is a calibration mechanism one end of the tube-shell,

in Fig.10 diagram of the automatic control mechanism of the weighing.

The automatic production line of shells TVEL contains an inclined rack and pinion table 1, along which technological order is placed: two mechanism 2 (Fig.1, 4) pieces of tubing with two sides, the size of the shell 3 for a fuel rod with 4 drives rotation and axial reciprocating movement 5 (Fig.4) with shaped cutters 6 chamfering two sides of the tube-shell 3, is positioned relative to the cutting cutters 7 (Fig.4) on the offset trajectories of rotation, with collets 8, the rods 9 are provided with channels 10 compressed air in the cutting zone 11 on both sides of the tube-shell 3, with the clamps 12 (Fig.5) fixing the tube to the inclined rack and pinion table 1 at the moment of cutting the tube in the size of the shell 3 for Fe, it combines the ejector 13 and the slope (Fig.6) with work surfaces coated with a polymer material, made on the rotary shaft 14 and provided with sensors 15 control the operation of the clamp 12, the ejector 13 and the ramp, with the lugs 16 (Fig. 1) on-axis placement of the tube at the position of the segments, limiting the swing motion mechanisms 2 segments ttrouble shell 3 in the form of fixed 17 (Fig. 5) in the axial direction and movable lugs 18 with the sensors 19,

the calibration mechanism and the rod 20 (Fig.9) one end of the tube-shell 3 with the actuator 21 for axial reciprocating movement, the tapered ferrule 22 collet clamp coaxially located relative to the rod 20 is placed inside a "floating" tilting Cams 23 with a spherical outer surface,

- pressing mechanism 24 (Fig. 1) plugs 25 in the grooved end of the tube-shell 3,

- the weighing mechanism 26 of the tube-shell 3 is pressed by the cover 25,

- roller conveyor 27 (Fig.1) transport membranes 3 on the inclined rack and pinion table 28 and installation 29 electron-beam welding of the shell 3 with a plug 25, after which there is an inclined rack and pinion table 30 with the mechanism 31 alignment of the shells 3, the mechanism 32 Stripping weld and mechanism 33 ultrasonic testing of the weld. The actuator 5 (Fig.4) axial reciprocating movement of the mechanisms 2 pieces of tubing in the size of the shell 3 is made in the form of pneumatic cylinders communicated through pneumatocele 34, valve 35 and the block 36 (Fig.2) with pneumatic compressor station compressed air supply (not shown).

Drive 21 (Fig whom 3 are made in the form of pneumatic cylinders communicated through pneumatocele 37, valve 38 and the block 39 (Fig.2) with pneumatic compressor station compressed air supply (not shown).

The clamp 12 (Fig. 5, 6) fastening the tube to the inclined rack and pinion table 1 and the ejector 13 is equipped with a pneumatic cylinder 40 (Fig.2), transmitted through pneumatocele 41, valve 42 (Fig.2) and the block 43 with pneumatic compressor station compressed air (not shown).

The cutting teeth 7 with shaped cutters 6 is equipped with a pneumatic cylinder 44, pneumovirinae 45 in the form of pneumatic cylinders, communicated through pneumatocele 46, pneumatic 47 (Fig.2) and a pneumatic unit 36 with a compressor station compressed air (not shown). The movable stop 18 (Fig.1, 8) mechanism of control of the length of the tube-shell 3 provided with a pneumatic cylinder 48 provided through pneumatocele 49, valve 50 (Fig.2) and a pneumatic unit 43 with the compressor station (not shown). The mechanism 24 of the mounting stub 25 (Fig.1) in the grooved end of the tube-shell 3 is equipped with mo-eurocylinder 51, communicated through pneumatocele 52, valve 53 (Fig.2) and a pneumatic unit 43 with the compressor station (not shown). The mechanism 31 alignment of the ends of the shell 3, the mass is 43 with the compressor station (not shown). The mechanism 32 Stripping weld shell 3 and the stub 25 is equipped with a pneumatic cylinder 57, communicated through pneumatocele 58, valve 59 (Fig.2) and a pneumatic unit 39 with the compressor station (not shown). The mechanism 33 (Fig.1) ultrasonic inspection of the weld is supplied by a pneumatic cylinder 60, communicated through pneumatocele 61, valve 62 and pneumatic block 39 with the compressor station (not shown).

The control mechanisms of the length of the tube-shell 3, the calibration rod 20 at one end of the tube-shell 3, the fitting 24 of the stub 25 in the grooved end of the tube-shell 3, weighing 26 of the tube-shell 3, the alignment 31 of the ends of the shells 3, Stripping, 32 and ultrasonic weld control 33 is equipped with ejectors 13 with pneumatic cylinders 63, communicated through pneumatocele 64, pneumatic 65, blocks pneumatic 39 with the compressor station (not shown). Position 13, 63, 64, 39 are common to all of the above mechanisms. The control mechanism of the length of the tube-shell 3 provided with a block 66 of approval displays, system 67 automatic control and system 68 setting (Fig. 8). The mechanism 26 weighing shell 3 is equipped with electronic computing machine 69, system 70 is a switch of working line (not shown).

The cleaning mechanism of the inner and outer surfaces of the tube-shell 3 is combined with the mechanism 2 segments, where for cleaning the inner surface of the coaxial tube is placed a hollow piston rod 72 of the cylinder 73, communicated through pneumatocele 74, the valve 75, block 39 with pneumatic compressor station compressed air supply (not shown). For cleaning the outer surface of the tube-shell 3 used channel 10 input compressed air in the piston rod 9 (Fig.4), which is built on a tangent to the channel 76 placement of a tube-shell 3.

Channel 10 reported through pneumatocele 77, the valve 78, block 39 with pneumatic compressor station (not shown).

The automatic production line sheath of a fuel rod works as follows.

By tilting the table 1 procurement tube is supplied to the engine 2 pieces of tubing in the size of the shell 3, where the tube clamps 12 is pressed to the table 1. Due to the fact that the clamps coated with a layer of polymeric material when pressure is applied zirconium tube 3 to the table its damage does not occur. On both sides of the tube with 5 drives in the form of cylinders of the engine 2 segments are moved towards each other until the lugs 16, the ends of the tube clamp is OK 36 pneumatic, the valve 35, pneumatocele 34 is supplied to the actuator is a pneumatic cylinder 5. Enables compressed air to the pneumatic cylinder 44 from the compressor station (not shown) through the block 36 pneumatic, valve 47, pneumatocele 46, pneumobilia 45, includes drive 4 speed and in zones 11 cutting cutting blades 7, the tube is cut to the size of the shell 3, is removed corresponding chamfer shaped cutters 6 with the ends of the tube-shell 3. Turns on the compressed air through the block 39 pneumatic, valve 78, pneumatocele 77 in the channel 10, embedded in the rod 9 at a tangent to the channel 76 placement of a tube-shell 3, and due to the centrifugal rotation of compressed air to produce a dry cleaning of the outer surface of the tube-shell 3. Turns on the compressed air through the block 39 pneumatic, valve 75, pneumatocele 74 on the pneumatic cylinder 73 and the hollow shaft 72, where the compressed air is dry cleaning of the inner surface of the tube-shell 3. At the end segments of the cutters returned to its original position, and after dry cleaning rod of the pneumatic cylinder 73 is returned to its original position and stops the supply of compressed air. On the pneumatic cylinder cilindro 40 by the signal of the sensor 15 acts on the rotary shaft 14, removes the clamp 12, releases the tube-shell 3 and the ejector 13, the tube-shell 3 of the lodgement is pushed on the tilt table 1, which rolls down to the position of the control length. Through the block 43 pneumatic, valve 50, pneumatocele 49 receives the compressed air in the pneumatic cylinder 48, the piston rod which, by acting on the movable stop 18 with the sensors 19, moves the tube-shell 3 to a stationary stop 17 and is its length. From sensors 19 the control through the block 66 matching indexing is transmitted to the system 67 automatic control and system 68 setting. In the case of a suitable tube-shell 3 system setting 68 instructs the continuation of the manufacturing process through the supply of compressed air in the block 39 pneumatic, valve 65, pneumatocele 64, pneumatic cylinder 63, which, acting on the ejector 13, will move the tube shell 3 on the inclined table 1, and by an inclined table 1 tube-shell 3 will take place at the position calibration. On the position of the calibration rod 20 at one end of the tube-shell 3 in the actuator 21 in the form of a pneumatic cylinder receives compressed air through the block 39 pneumatic, valve 38 and pneumatocele 37. When the rod 20 wodis is engaged by Cams 23 in cone holder 22 collet clamp, the rod 20 and a conical ferrule 22 is returned to its original position, and the tube-shell 3 with the calibrated end of the ejector 13 is reset on the tilt table and the tube-shell arrives at the position of the mounting stub 25 by the pressing mechanism 24. Through the block 43 pneumatic valve 53, pneumatocele 52 in the pneumatic cylinder 51 is supplied with compressed air and by the rod affects the mechanism 24, which supressive the plug 25 in the calibrated end of the shell 3. Actuates the ejector in this position and the sheath 3 on the inclined table 1 arrives at the position of the weighing mechanism 26. The weighing results through the electronic computer 69, the automatic control system 70 receives the system of set-overlay 71, where the shell 3 ejector goes on tilt table 1 for further processing, or in the case of marriage off the line to ascertain the circumstances of the marriage. After weighing the shell 3 on the inclined table 1 is fed to the roller 27, which is transported on the tilt table 28 and loaded into the installation 29 electron-beam welding of the shell 3 and the stub 25. After welding the sheath 3 on the inclined table 30 is supplied to the mechanism 31 alignment of the ends of raspredelitel 56 and pneumatocele 55. Then the party shell 3 is fed by a pneumatic cylinder 57 on the mechanism of 32 cleaning of the weld. The compressed air in the pneumatic cylinder 57 is fed through the block 39 pneumatic, valve 59 and pneumatocele 58. The ejector shell 3 with the Stripping mechanism is served by an inclined table 30 on the mechanism 33 ultrasonic inspection. The axial displacement of the shell 3 by means of pneumatic cylinder 60, the compressed air, which enters through the block 39 pneumatic, valve 62 and pneumatocele 61.

Tested automatic lines for manufacturing membranes TVEL has shown that its translation from hydro to pneumatic systems have eliminated samosohranenie membranes in the process of their manufacture, and in conjunction with dry cleaning to eliminate and wet cleaning of the membranes. The goal of the project to improve the yield of the membranes and reduce the cost of manufacture of membranes achieved. In addition, decreased the length of the line, and expands the working area.

1. The automatic production line of fuel cladding containing an inclined rack table, along which technological sequence placed the cutting device t is-and-forth movement, with shaped cutters chamfering two sides of the tube-shell, positioned relative to the cutting cutters on the offset trajectories of rotation, with collets, the rods are channels of compressed air into the cutting zone on both sides of the tube-shell, with clamps fastening the tube to the inclined rack table at the time segments of the tube in the amount of membrane for a fuel element that combines the ejector and scat with work surfaces coated with a polymer material, made on the rotary shaft and provided with sensors control the operation of the clamp with stops along the layout axis of the tube at the position of the segments, limiting the stroke of the movement of pieces of tubing with the distance between them defining a given length of the tube-shell, a mechanism to control the length of the tube shell in the form of immovable in the axial direction and rolling stops with sensors, a calibration mechanism rod one end of the tube-shell driven axial reciprocating movement, the tapered collet holder clip, coaxially located relative to the piston rod placed inside a "floating" tilting Cams with a spherical outer surface, the mechanisms of the end of the tube-shell, the mechanism of the weighing tube-shell with sealed cover, the installation of electron-beam welding pressed caps to the shell, the mechanism of alignment of the ends of the shells, the Stripping mechanism of the weld, the mechanism of ultrasonic weld inspection tools and wiring tube-shell, and subsequently the membrane from mechanism to mechanism, wherein the actuator axial reciprocating movement of the mechanisms segments of the tube with the two sides in the size of the shell and the drive axial reciprocating movement of the calibration mechanism one end of the tube is made in the form of pneumatic cylinders, communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air, the clamp attaching the tube to the inclined rack table, cutting cutters shaped cutters, the ejector tube-shell from the position of the segments, the movable stop mechanism to control the length of the tube-shell, collet clamping mechanism, calibration rod, mechanism mounting bracket into the grooved end of the tube-shell, the mechanism of alignment of the ends of the shells, the Stripping mechanism of the weld and the mechanism of ultrasonic weld inspection provided pneumology compressed air, the control mechanisms of the length of the tube-shell, calibration rod one end of the tube-shell mounting bracket into the grooved end of the tube shell, weighing tube-shell with cork, the alignment of the ends of the shells, cleaning and ultrasonic weld control is equipped with ejectors with air cylinders, communicated through pneumatocele, pneumatic units with pneumatic compressor station compressed air, the control mechanism of the length of the tube-shell provided with a block matching display, automatic control system and setting, the weighing mechanism of the shell is equipped with automatic control system electronic computing machine and system of set-overlay the cleaning mechanism of the inner and outer surface of the tube shell is combined with a cutting device for internal cleaning used coaxial tube is placed a hollow rod of the air cylinder is communicated through pneumatocele, the valve and the pneumatic unit with a compressor station compressed air and used to clean the outside channel of the input compressed air in stock, which is built on a tangent to the channel occupancy of a tube-shell.

I pneumocytes in the form of pneumatic cylinders.

 

Same patents:

Fuel element // 2179751
The invention relates to the field of nuclear technology and can be applied primarily for nuclear reactors of different types of fuel elements (cartridges), with free fuel composition, gas-filled volume for collection of gaseous fission products

The invention relates to the field of nuclear energy, in particular for fuel assemblies of nuclear power reactors

The invention relates to nuclear technology, and more particularly, to housings channels of nuclear reactors

The invention relates to nuclear energy and may find application in the manufacturing of fuel elements for nuclear power reactors

The invention relates to nuclear energy and may find application in the manufacturing of fuel elements rod type

The invention relates to nuclear energy and may find application in the manufacturing of membranes for fuel cells

The invention relates to nuclear energy and may find application in the manufacturing of fuel assemblies for a nuclear reactor

The invention relates to nuclear energy and may find application in the manufacturing of fuel elements for fuel assemblies of nuclear power reactors

The invention relates to nuclear power and may find application in the manufacturing of fuel elements (FE) for nuclear reactors mainly water-water energetic reactor (WWER)

The invention relates to non-destructive testing products acoustic emission technique and can be used in particular for quality control of fuel elements in the manufacturing process used in nuclear reactors

FIELD: atomic power engineering.

SUBSTANCE: device has welding chambers having apertures for inputting covers for pressurization, which concurrently are output apertures of heat-conductive elements, welding chambers electrodes, power source, transporting module for transverse product feed, common control system with blocks for parallel and serial connection, device for forming a break in secondary contour. Welding chambers are placed in parallel to each other at distance from each other, determined from formula S=t(m k+1), where S - distance between chambers axes, t - step of transport module, k - number of chambers in device equal to number of steps of transporting module in each singular step thereof, m - any integer starting from one, and control systems connected through parallel connection block to working tools of device of same names, and through block for serial connection to welding force drive and to device for forming break in secondary contour of power source, as well as to power source connected in parallel to welding chambers electrodes.

EFFECT: higher efficiency.

4 cl, 1 dwg

FIELD: nuclear power engineering; manufacture of fuel elements and their claddings.

SUBSTANCE: each weld of cladding and its plug are tested in facility equipped with units for clamping and revolving the claddings, scanning with carriage using weld inspection piezoelectric transducer and piezoelectric transducer for measuring wall thickness in measurement region, immersion bath, ultrasonic pulse generator, ultrasonic pulse receiver, microprocessor, analog-to-digital converter switch, and random-access memory.

EFFECT: enhanced quality of fuel elements and their operating reliability in reactor core.

1 cl, 1 dwg

FIELD: power engineering, namely nuclear power reactors, particularly sealing of fuel elements by means of contact butt welding with use of plugs.

SUBSTANCE: apparatus includes sealed welding chamber with housing non-detachable at operation and having through duct for feeding parts to welding zone; mechanisms for sealing welding chamber; device for feeding parts to welding zone; additional clamp of tube; mechanisms for gripping and fixing welded parts; drive device for supplying welding pressure; autonomous drive units. Mechanisms for gripping and fixing welded parts are in the form of collet chucks with respective drives. Welding pressure supply drive device is connected with electrode holder of plug. Welding chamber is restricted by non-detachable housing and flange-current supply lead that is fluid -tightly connected with housing and fixed relative to housing at operation. One collet chuck has annular detachable current supply lead in the form of sectors and it rests by its end at side of large base of petal cone upon said flange-current supply lead. Collet chuck of tube grip and electrode-holder of plug have coaxial electrically insulated one relative to other tie rods arranged in through duct of chamber and joined with autonomous drive units.

EFFECT: enhanced stability of process, improved quality of welded joint due to lowered misalignment of tube and plug.

1 dwg

FIELD: nuclear power engineering; manufacture of fuel elements for fuel assemblies of nuclear power reactors.

SUBSTANCE: proposed process line has mechanism for press-fitting bottom plug in calibrated end of can provided with cutoff gear for piece-by-piece feeding of bottom plugs of different types that incorporates bottom plug passage duct accommodating C-shaped member with reciprocating horizontal-motion actuator whose top flap has slot engageable with upper cylindrical part of bottom plug; bottom flap is longer than top one and is provided with bottom plug passage hole shifted toward edge of bottom flap; flaps are spaced apart through distance slightly longer than maximal length of thick end of bottom plug; rod designed for press-fitting bottom plug in calibrated end of can has bed with seat to receive bottom plug, maximal-size portion of seat following shape of bottom plug.

EFFECT: enlarged functional capabilities of process line for manufacturing fuel-element cans of different sizes.

1 cl 7 dwg

FIELD: mechanical engineering.

SUBSTANCE: proposed method is intended for manufacturing fuel elements using resistance-butt welding primarily for their joining to zirconium alloy cans. Welding is effected at equipment electrical resistance not over 30-fold resistance of can section forming welded joint having or not point discontinuities in the form of separate spots or chain of such spots forming no continuous line and measuring maximum ten thicknesses of weld in cross-sectional area of welded joint under check disposed at distance equal to two or three thicknesses of can wall from butt-end of plug located inside fuel element, welded joint being checked by uniformity of external fin. Length of poor fin formation section does not exceed 10% of joint perimeter.

EFFECT: enhanced quality of welds and reliability of fuel element sealing.

2 cl

FIELD: nuclear power engineering; tubular dispersed-core three-layer fuel elements.

SUBSTANCE: proposed method includes production of powder mixture, powder mixing in plasticizer environment, cold molding in core billet with plasticizer, thermal sintering, hot molding-calibration of fuel core, core placing in can made in the form of sleeve with annular slot, calibration, hot molding through die, and drawing; inner surface of external can of sleeve is provided with longitudinal bulges and outer surface bears bulge location marks; fuel core is provided with longitudinal flats and placed in sleeve taking care to align bulges of the latter with core flats; in the course of drawing marks are aligned on arbor ribs.

EFFECT: enhanced stability of active layer and can thickness in shaping polyhedral fuel elements.

1 cl, 4 dwg

Up!