RU2596832C1 - Bearing chain - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to chain transmissions and can be used in hoisting machines and mechanisms used in case of overload in nuclear reactors. Chain comprises two branches made with possibility of movement by means of two drive sprockets, own for each branch. Each branch is plate-like hinged chain, which plates after coming with sprockets, being adjoined to each other, form "pushing" chain. Plates of one branch have recesses, and plates of other branch contain bushings fixed on them made with possibility of engagement with each other at connection of chain branches carrying at same time, wherein plates of one branch enter space between plates of other branch.

EFFECT: higher rigidity of chain.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, in particular to chain transmissions and can find application in hoisting machines and mechanisms used in overloading in nuclear reactors.

Chain (Encyclopedic Dictionary, 20099 - a flexible connection consisting of a number of interconnected links. It is well known that a chain is a flexible product of the same mutually movable solid links connected in series with each other. Drive chains are distinguished (for transmission of motion), traction (for moving goods), freight (for suspension and lifting).

LinearChain firm chains are known from Framo Morat GmbH & Co. KG (Website: www.framo-morat.com. Technical information - catalog http://framomorat.exportpages.ru/productdetail/1089102143-1.htm, 10.20.2014). The rigid chain LinearChain (Linear chain) consists of a special design chain links that allow the chain to push, as well as pull heavy loads. Chain links have a special profile with a finger lock at one end, which allows the linear chain to collapse or deploy in only one direction. When unfolded, the latch fingers are connected together to form a “rigid stop device”. By the geometry of the connecting plates, loss of stability under compressive loads is prevented. A linear chain is capable of moving loads horizontally and vertically.

Pusher chains are known for the French company Serapid, which specializes in systems for horizontal and vertical movement of goods based on the proprietary rigid push chain technology (Website: www.serapid.com). At the heart of its technology is a rigid chain - “the chain that can push”. As a pusher, a specially designed thrust chain with a constructive restriction of freedom of bending (one way) is used.

However, the disadvantage of this known rigid chain is that it is a mechanical device that can be bent in one direction, but absolutely not bent in the other.

Known chain (Patent WO No. 2004402510 A2, F16H, publ. 08.26.2004), which is a multi-strand drive chain containing at least two branches of the circuit connected in such a way that the chain drive can communicate with a force that allows pushing or pulling. The chain drive is essentially rigid in a linear orientation, and the pivotally connected chain links may not substantially rotate relative to each other and cannot be deviated substantially from a linear orientation. Chains can rotate around sprockets that provide chain drive force.

A disadvantage of the known circuit is that there is no internal space for accommodating, for example, hoses for supplying cooling to the spent fuel assembly.

Known INTERLOCKING CHAIN CTRUCTURE (US Patent No. 3645146, F16H 27/02, publ. 02.29.1972) - a rigid structure of roller type chains without the possibility of rotation, which is a combination of two mutually interlocking chains, each of which contains two rows of plates, internal and external located in parallel planes relative to each other. Each plate has a pair of holes spaced in it. Roller mechanisms are located between the holes of pairs of internal and external plates. Each pair of outer plates is fixed with a displacement by one hole with a neighboring pair of inner plates with pins passing through the corresponding holes from each pair and through a roller connected with them to form a structure connected to a pair of wheels located at a distance from each other on parallel axes passing transversely with respect to chains, with the possibility of turning them when locked. The pins fasten the inner and outer plates together and move them along the roller mechanism. The sprockets pass through the respective roller mechanisms, with each sprocket configured to receive one of the plates of the corresponding chain and advance it in the opposite chain closely adjacent to each other in parallel. All plates are equipped with hooks of the same design. The hooks of the internal and external plates of the corresponding chain, when locked, pass in the direction of these chains, i.e. the hooks of the inner and outer plates of one chain are reversed with respect to the other. Each hook of the corresponding row (for example, the outer plates) of one chain can be locked with the adjacent hook of the corresponding oncoming row of the other chain. The locking of the plates with each other passes between the two sprockets, forming a rigid assembly. The branches in such a rigid chain structure can only be separated by moving them in the opposite direction between the sprockets.

The disadvantage of this known rigid chain structure is that a chain consisting of two branches has rigidity in only one direction, and not in the other.

Known COMPRESSION RESISTANT CHAINS (US Patent No. 2375461, F16G 13/12, B66F 3/06, E02B 7/36, publ. 05/08/1945) - a rigid chain system consisting of a pair of opposite chains, where each chain includes transverse sprockets attached connecting pins and two sets of flat plates located at the ends of the pins. A variant with a third chain, which is located between opposite chains, is possible. The pins of the third chain are aligned at right angles to the corresponding pins of the other chain, linking them with their links. Opposite chains are connected internally and their links have the ability to prevent external system loss of stability.

However, the disadvantages of this known rigid chain system include the fact that the internal space between the chains is occupied by the fixing elements of the links, which makes it impossible to place gas hoses, for example.

The basis of the invention is the task of developing a circuit design that allows, in the process of overloading a nuclear reactor while moving the capture, to fix the branches relative to each other in two perpendicular directions.

To solve this problem, a carrier chain design has been proposed, which contains two branches, the movement of which is carried out using two sprockets, each for each branch included in the drive of the carrier chains. Moreover, each branch of the carrier chain is structurally a plate hinge chain, the plates of which, after leaving the sprocket, adjoin each other, forming a “pushing” chain. Each plate of one of the branches has special samples. Each plate of the other branch contains a sleeve mounted on it. When combining both branches, the bushings engage in the samples and the plates of one branch are placed in the space between the plates of the other branch. This design feature ensures the fixation of the branches of the carrier chain relative to each other in two perpendicular directions, and also forms the inner space between them.

The internal space between the two branches of the carrier circuit can be used, in particular, to accommodate control elements for gripping or hoses for supplying cooling to the spent fuel assembly.

The technical result that can be obtained by using the present invention is the possibility of using the internal space between two branches of the carrier chain and expanding the operational capabilities of the chain mechanism.

The technical result is achieved due to:

- supplying plates of one branch of the chain with bearing bushings, and plates of the other branch with samples;

- placing the plates of one branch in the space between the plates of the other branches, which ensures the fixation of the branches of the carrier chain relative to each other in two perpendicular directions and creates an internal space between them.

The invention is illustrated by the following drawings, shown in FIG. 1-2:

FIG. 1 is a general view of a carrier circuit;

FIG. 2 is a view A in FIG. one.

The carrier chain (Fig. 1 and 2) contains two branches 1 and 2, the movement of which is carried out using two sprockets 3 and 4, its own for each branch and carrier chains included in the drive (not shown in the drawing). The plates 5 of the branch 1 have samples 6. The plates 7 of the branch 2 contain bushings 8 fixed to them. Each branch 1 and 2 of the carrier chain is structurally a plate hinged chain.

When both branches 1 and 2 are aligned, then the plates 5 of the branch 1 are placed in the space between the plates 7 of the branch 2, and the bushings 8 of the plates 7 are placed in the samples 6 of the plates 5. This design fixes the branches 1 and 2 of the carrier chain relative to each other in two perpendicular directions, and also creates an internal space 9 between the branches (Fig. 2).

The carrier circuit operates as follows.

The drive of the carrier chain drives the sprockets 3 and 4, which move the plates 5 and 7 of the branches 1 and 2. The adjacent plates of each branch 1 and 2, after leaving the sprockets 3 and 4, adjoin each other, forming a “pushing chain”. In this case, after the descent of branches 1 and 2 from the sprockets 3 and 4, the plates 5 of the branch 1 enter the inner space between the plates 7 of the branch 2, and the sleeve 8 attached to the plate 7 falls into the samples 6 on the plate 5.

Thus, when moving the gripper, the proposed carrier chain ensures the fixation of the branches relative to each other in two perpendicular directions, which allows efficient and reliable operation of the refueling equipment in the process of overloading a nuclear reactor.

Claims (1)

Carrier chain, characterized in that it contains two branches, made with the possibility of moving with the help of two sprockets to drive the carrier chains, for each branch, and each branch is structurally a plate hinge chain, the plates of which, after leaving the sprocket, adjacent to each other, form a “pushing” chain, while the plates of one branch have samples, and the plates of the other branch contain bushings fixed to them, made to engage with each other when connecting the branches of the carrier chain Temporarily, the plates of one branch fall into the space between the plates of the other branch to ensure the fixation branches with respect to each other in two perpendicular directions.

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