RU219089U1 - MECHANISM OF MOVING THE LEAF OF THE SLOCK OF THE NPP TRANSPORT LOCALIZING SAFETY SYSTEM WITH BAYONET CLADING OF THE LEAF - Google Patents

Abstract

The utility model relates to the field of mechanical engineering, namely to nuclear power engineering, in particular to equipment installed in the containment shells of a nuclear reactor, which ensures hermetic overlap of the transport openings of the localizing safety system of an operating nuclear power plant and transportation through the gateway of transport cargo and equipment with large overall dimensions. The mechanism for moving the leaf of the gateway of the NPP transport localizing safety system with bayonet meshing of the canvas includes guides of the main movement, guides of the auxiliary movement fixed on the guides of the main movement, and at least one balancing block. The leveling block is installed on the guides of the main movement and contains in its design at least one clamp, which ensures the fixation of the rope and excludes the movement of the rope relative to the leveling block. The utility model improves the reliability and safety of operation of transport locks with bayonet meshing of canvases. 3 w.p. f-ly, 3 ill.

Description

The utility model relates to the field of mechanical engineering, namely to nuclear power engineering, in particular to equipment installed in the containment shells of a nuclear reactor, which provides hermetic overlap of the transport openings of the localizing safety system of an operating nuclear power plant and transportation through the gateway of transport cargo and equipment with large overall dimensions.

The transport lock (Sluice) is an element of the hermetic fencing system, which is part of the localizing safety system (LSS) of a nuclear power plant (NPP). The gateway is built into the building structure of the hermetic enclosure and is part of the equipment of the transport portal of the reactor compartment.

The gateway during operation performs the following functions:

preservation of the design tightness of the hermetic enclosure under normal operating conditions and emergency situations;

protection from external environmental influences of systems and elements, the failure of which can lead to an unacceptable release of radioactive substances;

ensuring the transportation through the lock while maintaining the tightness of the hermetic enclosure (locking) of fresh fuel in cases, spent fuel in containers, radioactive waste in containers, transport and technological equipment, devices and devices for technological maintenance and repair, repaired equipment and its components, materials, spare parts;

ensuring fire protection, as well as the tightness of the hermetic enclosure and the inter-shell space during the fire and after the fire has passed.

Known is the design of the mechanism for moving the web of the lock of the transport localizing safety system of a nuclear power plant with bayonet engagement of the webs according to patent RU 209102 U1, which includes guides for the main movement, fixed on the concrete structure of the power unit of a nuclear power plant, which are welded structures, along which, by means of a cable system and at least one mechanism of the main movement, fixed on the main movement guides and representing a hydraulic drive, the main movement of the web occurs, providing opening / closing of the transport opening of the lock, auxiliary movement guides, fixed on the main movement guides, along which, by means of at least one auxiliary movement drive, fixed on the main movement guides representing a hydraulic drive, an auxiliary movement of the web is carried out, which makes it possible to lock the bayonet closure.

The disadvantage of this design is the lack of technical solutions to prevent the fall of the web with one of the branches of the ropes. The objective of the claimed utility model is to develop a mechanism for moving the web of the lock of the NPP transport localizing safety system with bayonet meshing of the webs, which prevents the web from falling when one of the branches of the ropes breaks. The technical result of the claimed utility model is the creation of a mechanism for moving the leaf of the lock of the transport localizing safety system of a nuclear power plant with bayonet meshing of the canvases, which ensures an increase in the reliability and safety of operation of transport locks with bayonet meshing of the canvases.

The technical result is achieved due to the mechanism for moving the leaf of the lock of the NPP transport localizing safety system with bayonet meshing of the canvas, which includes guides for the main movement, fixed on the concrete structures of the nuclear power plant, which are welded structures, along which, by means of a rope system, which consists of two double chain hoist, and at least one main movement drive, fixed on the main movement guides, the main movement of the web occurs, providing opening / closing of the transport opening of the lock, auxiliary movement guides, fixed on the main movement guides, along which, by means of at least one auxiliary movement drive, fixed on the guides of the main movement, an auxiliary movement of the web is carried out, providing the possibility of locking the bayonet lock and at least one equalizing block installed on the guides of the main movement and containing in its design at least one clamp, which ensures the fixation of the rope and excludes the movement of the rope relative to the equalizing block. In this case, the guides of the main movement can be placed on the body of the gateway.

In this case, the web can be installed on the guides of the main movement by means of two or more carriages connected with the web by mechanical links.

In this case, the drive of the main movement can be fixed on the body of the lock or on the concrete structures of the power unit of the nuclear power plant.

In this case, the auxiliary movement drive can be fixed on the carriages or the sluice body.

In this case, there may be drives for fixing the web in the extreme position, located on the web or guides of the main movement and retracting locking pins that ensure the fixation of the web in the open position.

At the same time, there may be additional guides on the body of the lock to implement the auxiliary movement of the web and its centering at the moment of locking the bayonet closure.

In this case, in the design of the equalizing block, there may be at least one coil of rope friction.

At the same time, the design of the leveling block may include an angular displacement lock that limits the angle of rotation of the leveling block when one of the rope branches breaks.

In this case, shoulders can be made in the body of the equalizing block, which, in the event of a break in one of the branches of the rope, are actuating elements that ensure the operation of the elements of the control system (limit switch or proximity sensor) that signal a malfunction.

The essence of the proposed utility model is illustrated by drawings.

Fig. 1 - The design of the lock of the transport localizing safety system of a nuclear power plant with bayonet meshing of the canvases.

Fig. 2 - Scheme of rope reeving.

Fig. 3 - The design of the surge block.

In the figures, the following structural elements are marked with positions:

1 - Lock housings;

2 - Canvas;

3 - Guides;

4 - Mounting brackets for guides;

5 - Drives of the main movement;

6 - Auxiliary movement drives;

7 - Mechanisms for fixing the web in the extreme position;

8 - Carriage;

9 - Bracket for fastening the drive of the main movement;

10 - Bayonet ring;

11 - Body equalizing block;

12 - Angular movement lock;

13 - Shoulders of the equalizing block body;

14 - Clamps.

In FIG. 1 shows the body of the transport lock 1 with the canvas 2, which is installed on the carriages 8 and moves along the guides 3 with the help of the drives of the main movement 5, mounted on the brackets 9 on the guides 3, which allows the main movement of the canvas to be realized - a branch that provides the opening of the transport opening for transportation oversized cargo. To lock the bayonet lock, which in this case is implemented by turning the bayonet ring 10, it is necessary to ensure that the teeth of the blade 2 are engaged with the teeth of the bayonet ring 10, which is provided by the auxiliary movement drives 6 installed on the carriages 8. To fix the blade in the extreme position, there are mechanisms fixations 7.

The main movement of the web is realized by two drives of the main movement 5, located to the left and to the right of the sluice body 1. The upper blocks are designed to ensure the operability of the lift drive if the web and the lift drive are located on opposite sides of the guide 3 of the main movement. The body of the leveling block 11, mounted on the guides 3, has the ability to rotate by a given angular value, limited by the latch 12, sufficient to trigger the elements of the control system, signaling a break in one of the branches of the rope, from the impact of the collar 13.

The presence of the rope termination on the leveling block by means of clamps 14 makes it possible to prevent the web from falling when one of the branches of the rope breaks, since this emergency situation leads to the fact that only one chain hoist fails when the second retains its performance. In this case, in the event of a rope break, the load on the main movement drive does not change, which retains the ability to complete the main movement of the web and the functionality of the drive as a whole.

Claims (4)

1. The mechanism for moving the leaf of the gateway of the transport localizing safety system of a nuclear power plant with bayonet engagement of the canvas, including guides of the main movement, fixed on the concrete structures of the nuclear power plant, which are welded structures, along which by means of a rope system, which is two double chain hoists, and at least one drive of the main movement fixed on the guides of the main movement, the main movement of the web occurs, providing opening / closing of the transport opening of the lock, the guides of the auxiliary movement, fixed on the guides of the main movement, along which, by means of at least one auxiliary movement drive, fixed on the guides of the main movement, auxiliary movement is carried out web, providing the possibility of locking the bayonet lock, characterized by the presence of at least one leveling block installed on the guides of the main movement and containing in its design at least one clamp, which ensures the fixation of the rope and excludes the movement of the rope relative to the leveling block. 2. The mechanism for moving the web of the lock of the transport localizing safety system of a nuclear power plant with bayonet meshing of the webs according to claim 1, characterized in that at least one coil of rope friction is provided in the design of the equalizing block. 3. The mechanism for moving the leaf of the lock of the transport localizing safety system of a nuclear power plant with bayonet meshing of the canvases according to claim 1, characterized in that the equalizing block design has an angular movement lock that limits the angle of rotation of the equalizing block when one of the branches of the rope breaks. 4. The mechanism for moving the web of the lock of the NPP transport localizing safety system with bayonet engagement of the webs according to claim 1, characterized in that in the body of the leveling block there are beads, which, in the event of a break in one of the branches of the rope, are actuating elements that ensure the operation of the elements of the control system, signaling about occurrence of a malfunction.

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