Puller

 

(57) Abstract:

Use: for remote retrieval locking crimp washers when maintenance work is partially burnt two-beam fuel assemblies of a nuclear reactor. The inventive remover contains the power screw 1, a yoke 2 with a Central opening 4 for the placement of the power screw, the drive element 5, which is connected with a power screw, Cup 6, is designed for installation on removable element, a support 12 under the force of the screw, placed in the glass, the guides 13 for the bar, the ball joint 14, is placed in the traverse, the working body 3 with a tip mounted on a ball joint. 1 C. p. F. - ly, 3 ill.

The invention relates to fixtures for Assembly and disassembly of fasteners and is designed for remote retrieval locking crimp washers when maintenance work is partially burnt two-beam fuel assemblies of a nuclear reactor.

Known socket wrench with handle and swivel lock (Korsakov Century Novikov S. and M. P. Handbook of mechanization and automation of Assembly operations. M. the motor cycle", 1961, S. 174, Fig. 124A beaches). This key, you can install the washer without pads, but distantsionno cylindrical side unreliable.

Known socket wrench, comprising a housing-arm connected with him working cylinder, and Cam mechanism for gripping washer mounted in the working cylinder can be rotated, the casing with a ring gear, and the Cam mechanism is in the form of a few eccentrics in the form of truncated cones and the gear interconnected with the ring gear casing (ed. St. USSR N 567597, class 23 In 13/06). With the help of this key can be retrieved remotely flat round washer.

It is also known a device for remote retrieval megalapteryx washers (ed. St. USSR N 895640, class 23 In 13/06), containing the body-arm, working the head and covers the body casing, a sleeve with an outer casing located between the casing and the casing, while the casing is made with an inner cone, equidistant outer jacket sleeve, and the working head of the case is made with the lead cone and an oblique cut on his face. With this device you can easily remove the lock washer with unbendable legs, and remove the retaining clamp washer impossible.

Known manual puller (ed. St. USSR N 1115895, class 25 In 27/00), comprising a housing with a hole placed in it the drive screw with the G-shaped grip on the kg is not possible.

The closest in technical essence to the present invention is a stripper containing power screw, yoke with a working body and a Central hole to accommodate the power screw and the drive element connected to the power screw (ed. St. USSR N 465293, class 25 In 27/02).

This puller cannot be used to remove the locking crimp washers. This is due to the following factors:

the puller is designed to remove a part that is connected with the part with which it is removed by the cylindrical surface on the landing with tightness;

the puller is designed to overcome the resistance to movement of one part upon another;

puller only move one item along the longitudinal axis of the other parts, without making any other movement.

The aim of the invention is the separation distance of the locking crimp washers.

The task of the invention to develop such a design of the device for remote retrieval of the locking crimp washers, which would provide a reliable pan connection of the locking washer, and would create a situation in which reliable extraction.

For this puller containing the power screw, the grass is th power screw, according to the invention is equipped with a glass placed in it support under the power screw and the guide for the bar, and the working body is installed in the traverse on the ball joint.

The working body equipped with a nozzle, made in the form of knitting hook.

This constructive design of puller allows reliable engagement of the working body with the lock crimp washer, turning the glass on the end of the repaired beam rods allows the curvature of the locking crimp washers, and vertical movement of the bar to lift up the retaining crimp washer with its subsequent destruction.

In Fig. 1 shows a puller, a partial section of Fig. 2 section a-a in Fig. 1; Fig. 3 cross-section B-B in Fig. 1.

The puller includes a power screw 1, a yoke 2 with the working body 3 and the Central screw hole 4 for placement of the power screw 1 and the drive unit 5 (shown conventionally) connected with a power screw 1. The device also contains a glass 6, which is mounted to the side of the repaired beam 7 of the fuel rods and is centered on the power grid 8, which with locking crimp washers 9 are fixed to the head 10 of the fuel rods 11.

In the glass 6 reoom the hinge 14.

When you commit heads 10 of the fuel rods 11 in the power grid 8 of a bundle of fuel rods of the locking plate 9 is crimped with the formation of the lugs 15. The head 10 of the fuel rods 11 so tightly (in cross section) is placed in the power grid 8 that to get close to locking washers manipulator impossible. Therefore, it is advisable to run the tip 16 of the working body, interacting with the lugs 15 of the washer 9, in the form of a knitting hook, which is small in size, simple and durable, and provides a secure grip of the working body 3 with the lugs 15 of the locking washer 9.

The removal of the retaining crimp washers as follows. The beam 7 of the fuel rods, repaired partially burned fuel Assembly of a nuclear reactor, establish and fix the cutting device (not shown) of the hot cell. On the top side of the repaired beam rods install the device for remote retrieval of the locking crimp washers 9. Glass 6 of its end part is located on the heads 10 of the fuel rods 11 and is centered on the power grid 8 of the beam 7 of the fuel rods. Due to this, the entire device can be rotated about the longitudinal axis of the bundle of fuel rods and the working body 3 is an 6 in the area of location of the tip 16 of the working body 3 has a local neckline.

The tip 16 with the help of a hot cell manipulator (not shown) can now be easily inserted into one of the lugs 15 of the locking crimp washers 9 and coupled with it. The ball joint 14 greatly facilitates this operation. Now, the entire device must be rotated about the longitudinal axis of the bundle of fuel rods, thus there is a partial straightening of the locking washer 9. Then perform the rotation of the power screw 1 for the drive element 5. Traverse 2 guide 13 moves up the power screw 1, which is the lower end, located in the support 12, presses the Cup 6 to the heads 10 of the fuel rods 11. This creates a thrust force, which allows the working body 3, moving up together with the head plate 2, to carry out breakdown and the rise of the retaining crimp washer 9 on the head 10 of a fuel rod 11. Now the washer 9 may be freely picked up by the manipulator and moved into a waste container (not shown) of the hot cell.

Thus, the proposed puller allows easy introduction of the tip of the working body in eye remove retaining crimp washers, traction, with eyelet, partial straightening of the locking washer, breakdown and lifting the puck over the head of a fuel rod for posledeistviem for placement of the power screw, posted on traverse working body with a tip and a drive element connected to the power screw, characterized in that it is equipped intended for installation on removable element glass, placed in a glass support under the power screw, crosshead and guides a ball joint that is placed in the traverse, and the working body is installed on the ball joint.

2. The puller under item 1, characterized in that the tip of the working body in the form of a knitting hook.

 

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FIELD: devices designed for simplifying procedures of assembling/disassembling units.

SUBSTANCE: crank stripper includes cross piece 1 supporting power mechanism in the form of one-way telescopic hydraulic cylinder 2 having thrust rod 3 for shaft of crank 14; mechanism for forced closing of foots having cylindrical discs 8, 9, paired plates 10 and double-arm levers 4,5. One arm is used for engaging with crank; other arm of is cone one and it may rest upon lateral surface of cylindrical disc secured to lateral side of cross piece. Double-arm lever whose arms are mutually inclined by obtuse angle is jointly mounted through paired plates in center of disc. Articulation joint of lever is mounted in edge portion of second lever arm on line of inner surface of first lever arm.

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2 dwg

Stripper // 2271922

FIELD: machine engineering, namely mechanical strippers.

SUBSTANCE: stripper includes traverse bar with grips, screw having two outer threads with different pitches; main detachable sleeve mounted by thread whose pitch is less than that of said screw; additional threaded sleeve mounted by second thread of said screw; holder embracing both sleeves, fixed relative to them in angular direction and resting by its inner shoulder upon end of main sleeve. Inner shoulder is formed on one end of holder; other open end of holder is arranged in through opening of traverse bar and it is rigidly joined with said bar. Threads of powerful screw have similar sign; additional sleeve has outer flange spaced from open end of holder by interval determined according to relation K = B1(H2/H1 - 1), where K - interval between outer flange of additional sleeve and open end of holder; B1 - displacement (caused by main sleeve) of part stripped by means of stripper; H2 - thread pitch of additional sleeve; H1 - thread pitch of main sleeve. Sleeves are mutually spaced by interval T exceeding value of mutual convergence of sleeves.

EFFECT: simplified usage of stripper.

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FIELD: machine building.

SUBSTANCE: invention refers to manual tools and is used for removal of packing plug from channel. The plug consists of an external clutch and an internal core retained in the external clutch. The said removal is performed upon drilling an appropriate blind hole in the core. Device for removal (4) consists of conic punch (15) for forced introduction into core (14) to ensure interference fit between punch (15) and core (14). Further, core (14) is withdrawn from clutch (13); simultaneously core (14) is maintained on punch (15) due to interference fit. Also device for removal (4) consists of facility for clutch catcher (16) designed to catch clutch (13) after removal of core (14) with punch (15) from clutch (13). Clutch catcher (16) and punch (15) are removed from removal channel together with clutch (13) and core (14) maintained on corresponding sections of removal device.

EFFECT: reliable retention of removed part on tool for removal and possibility of its further usage.

5 cl, 5 dwg

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FIELD: construction.

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EFFECT: facilitating the adapter removal from the opening, eliminating the destruction of the connecting units when removing the adapter.

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