RU152748U1 - DEVICE FOR INSTALLATION AND CHANGE OF AEROSOLIC FILTERS OF A NUCLEAR POWER PLANT - Google Patents

Abstract

1. A device for changing and installing aerosol filters of a nuclear power plant, including guides adapted for installation in a mine of a nuclear power plant, on which a filter hoist is mounted, connected by an electric winch, a support frame with a filter wringer and a filter clamp mechanism, mounted on a vertical support of the clamp mechanism characterized in that the filter clamp mechanism is made in the form of several independent clamp nodes, each of which is mounted on a vertical support of the clamp mechanism and adapted for clamping its filter in the vertical and horizontal planes. 2. The device according to claim 1, characterized in that each pressure unit includes an independent drive of the pressure unit connected to an independent drive shaft of the pressure unit connected to a converter for rotating the pressure shaft into the translational movement of the rocker arm, which is adapted for mounting with a filter element through the yoke. 3. The device according to claim 2, characterized in that the converter for rotating the clamping shaft into the translational movement of the rocker arm is made in the form of a gear transmission connected to a screw shaft located in the housing of the clamping unit. The device according to claim 2, characterized in that the beam and crossheads have a degree of freedom in two mutually perpendicular planes, ensuring uniform pressure of the filter along the entire plane of the seal.

Description

The technical field to which the utility model belongs.

The utility model relates to the field of air purification in nuclear power plants, and more particularly to devices for changing and installing filters of a nuclear power plant, including guides adapted to be installed in a mine of a nuclear power plant, on which a filter hoist is mounted, connected by an electric winch, a supporting frame with an extraction filters and filter clamp mechanism and can be used in nuclear power plants.

The level of technology.

The prior art device for changing and installing aerosol filters of a nuclear power plant, including guides adapted to be installed in a mine of a nuclear power plant, on which a filter hoist is mounted, connected by an electric winch, a support frame with a filter wringer and a filter clip mechanism mounted on a vertical support clamp mechanism (see the description “Device for changing and installing filters” PSF-U-3 on the website http://oborudunion.ru of the enterprise Grand Techno LLC, Internet address:

http://ukraina.oborudunion.ru/i_store/item_999849534/prisposoblenie-dlya-smeny-i-ustanovki-filtrov-psf-u-3.html)

This device is the closest in technical essence and the achieved technical result to the proposed solution and is taken as a prototype of the proposed utility model.

Its disadvantage is that it is difficult to operate the device and does not ensure the accuracy of installation and the uniformity of the pressure of each filter along the entire plane of the seal to the support frame. This is due to the fact that when installing or replacing filters, very precise pressing of each filter to the ventilation hole is required. But this design provides only the simultaneous pressing of all filters at once. At the slightest bias, violation of perpendicularity, geometry of the filter housing, the tightness of the filter seal to the support frame is broken. Since this device is used in nuclear power plants, this is fraught with the possibility of a filtered air passing by filters and, thereby, reducing filtration efficiency. Another disadvantage of this prototype is the low speed of installation and replacement of filters, since the first time it is almost impossible to smoothly lower the set of filters, you have to raise and lower them several times.

Disclosure of a utility model.

The present utility model, based on this original observation, mainly aims to propose a device for changing and installing aerosol filters of a nuclear power plant, which allows at least to alleviate the above drawback, namely, to increase the usability of the device while increasing the speed and accuracy of installation uniform pressing of each filter along the entire sealing plane to the supporting frame, which is the set technical task, which the present is intended to solve Usable model.

To achieve this goal, the filter clamping mechanism is made in the form of several independent clamping units, each of which is mounted on a vertical support of the clamping mechanism and is adapted to clamp its filter in the vertical and horizontal planes. Due to this advantageous characteristic, it becomes possible to press each filter independently of the others, while pressing it immediately on two planes: vertical and horizontal.

There is an advantageous embodiment of the utility model in which each pressure unit includes an independent drive of the pressure unit connected to an independent drive shaft of the pressure unit connected to a converter for rotating the pressure shaft into the translational movement of the rocker arm, which is adapted for mounting with a filter element through the yokes. Due to such an advantageous characteristic, it becomes possible to transmit the rotation of the shaft into the translational movement of the beam.

There is also an advantageous embodiment of the utility model, in which the converter for rotating the clamping shaft into the translational movement of the rocker arm is made in the form of a gear transmission connected to a screw shaft located in the housing of the clamping unit. Thanks to this advantageous characteristic, it becomes possible to provide a reliable pressing of the rocker arm.

There is a variant of the utility model in which the beam and the yoke have a degree of freedom in two mutually perpendicular planes, ensuring uniform filter pressing across the entire seal plane.

Thanks to this advantageous characteristic, it becomes possible to ensure a uniform pressure of the filter along the entire sealing plane.

The set of essential features of the proposed utility model is unknown from the prior art for devices of similar purpose, which allows us to conclude that the criterion of "novelty" for the utility model is met.

A brief description of the drawings.

Other distinguishing features and advantages of the utility model clearly follow from the description below for illustration and not being restrictive, with reference to the accompanying drawings, in which:

- figure 1 schematically depicts a General view of the device for changing and installing aerosol filters of a nuclear power plant, according to a utility model.

- figure 2 depicts a support frame with a spin mechanism, according to a utility model.

- figure 3 depicts a filter lift, according to a utility model.

- figure 4 depicts a filter clamping mechanism, according to a utility model.

In figures 1-4 indicated:

1 - support frame

2 - tube bundle for monitoring the degree of leakage of filter seals

3 - shaft of the spin mechanism

4 - traction

5 - rope (cable) of the spin mechanism

6 - roller

7 - a driving rod (shaft)

8 - lever lift

9 - cable lift

10 - elevator guides

11 - rope (cable) lift

12 - block

13 - support

14 - gear

15 - drive shaft

16 - pressure unit housing

17 - rocker

18 - traverses

19 - independent drive shaft of the clamping unit

20 - protective plate

21 - neck

22 - eye bolts

23 - winch

24 - winch cover

25 - manual drive unit clamps

26 - manual drive (key) winch

27 - sinking

28 - sinking node clamps

29 - vertical support mechanism clamps

According to figures 1-4, the device for changing and installing aerosol filters of a nuclear power plant includes guides 10 adapted for installation in a mine of a nuclear power plant, on which a filter hoist 9 is mounted, connected by an electric winch 23, a support frame 1 with a filter wringer and a filter clamping mechanism, fixed on the vertical support of the clamp mechanism.

The filter clamping mechanism is made in the form of several independent clamping units, each of which is mounted on a vertical support of the clamping mechanism 29 and is adapted for clamping its filter in the vertical and horizontal planes.

Each clamping unit includes an independent drive of the clamping unit, connected to an independent drive shaft of the clamping unit 19, connected to a converter for rotating the clamping shaft into the translational movement of the rocker arm, which is adapted for mounting with the filter element through the crosshead.

The Converter rotation of the clamping shaft into the translational movement of the rocker arm is made in the form of a gear 14 connected to a helical shaft located in the housing of the clamping unit 16.

The beam 17 is made in the form of a fin plate.

The rocker arm 17 and the yoke 18 have a degree of freedom in two mutually perpendicular planes, providing uniform filter clamping across the entire seal plane.

The support frame 1 is a flat welded structure with four U-shaped support frames arranged vertically one above the other. Filters are pressed to the supporting frames after they are installed.

A tube is placed in the cavity of each sealing frame to control the degree of leakage of the seal of each filter. A bundle of four tubes 2 is mounted on a plate welded to the frame. Each tube has a fitting with a threaded plug for connecting a device for monitoring the degree of tightness.

On the supporting frame 1 to the right and left of the sealing frames are spinning mechanisms designed to squeeze out the used filters from the frames before starting to unload them from the chamber.

The spin mechanism consists of spring-loaded shafts 3, on which the spin is rigidly fixed. At the lower ends of the shafts, rods 4 are rigidly fixed, to which a rope (cable) 5 is attached. A rope (cable) 5 is pulled through the roller 6 and connected at the other end to a drive rod (drive shaft) 7, which is led out through the passage outside the chamber.

The movement of the drive rod is provided with a lever lift 8, mounted outside the camera.

When the cable is tensioned, the shafts 3 are rotated, the squeezes are rigidly connected to the shafts, overcoming the tension of the return spring, they also rotate and move the filters away from the sealing frames. When the cable 5 is released from tension, the spin under the action of the springs return to their original position.

The cable lift provides lowering of “clean” filters into the chamber when loading and lifting of the used “dirty” filters when unloading from the chamber.

The elevator 9 is made in the form of a welded frame on which a platform for installing filters is installed. The elevator moves along two guides 10, preventing the possibility of its displacement. Adjustable screw supports consisting of a screw and a nut are welded to the elevator frame at the bottom. The rollers are installed on the sides of the elevator, providing the elevator movement along the elevator guides.

The cable of the cable lift 11 passes from the winch through the block 12 located on the chamber wall, two rollers mounted on the frame of the lift 9 and is fixed to the thimble of the support 13 located on the chamber wall opposite the block assembly 12.

The accuracy of the position of the filters is achieved by adjusting the screw supports of the elevator. The lift, falling down, rests with screw supports on the stops (bosses) mounted on the bottom of the camera.

The filter clamp mechanism provides the necessary filter clamp to the support frames.

Each filter installed in the chamber is pressed against the corresponding sealing frame by a separate screw clamp. The clamps using a bevel gear 14 are connected to the drive shafts 15. The upper ends of the drive shafts having a square "turnkey" head, displayed in the glasses located in the upper part of the penetration 28.

Each independent clamping unit includes a housing 16, a beam 17 and two yokes 18. The housing is made in the form of a welded structure mounted on a horizontal beam of the frame. A screw shaft 19 is installed in the housing.

At one end of the shaft, a beam 17 with traverses 18 is attached, at the other a conical gear pair transmitting movement from the drive shaft to the pressure shaft.

The beam 17 is made in the form of a fin plate. At the ends of the beam, eyelets are welded for attaching traverse 18 to it.

The traverse is made in the form of a rib having supporting protrusions at the ends. These protrusions transmit force to the filter when it is pressed.

When the filter is pressed, the rotational movement of the drive shaft 15 with the help of a bevel gear and a screw pair is converted into the translational motion of the screw shaft 19 of the clip and the associated rocker arm and traverse.

The clamp is carried out manually by a portable manual drive 25.

The protective plate 20 is installed in the opening of the chamber to protect personnel from radioactive radiation of substances accumulated by filters. When installing it in the opening, the protective plate rests on the supporting edge of the neck 21, sealing the passage and creating the required sealing force with its weight. In the upper part of the plate there are three threaded holes for installing the eyebolts 22, which are used when transporting the plate and removing it from the opening.

The winch 23 provides movement of the platform of the cable lift when loading and unloading filters. The winch is installed in the casing of the winch 24, the installed ceiling of the chamber. The winch is made in the form of a single-stage worm gearbox. A drum is mounted on the shaft of the driven wheel, on which the rope is wound. The upper end of the drive shaft has a square turning for connecting the drive (manual key drive or portable electric drive).

The winch is operated either by a portable electric drive, which is controlled by a control device or a manual drive (key) 26.

The device is mainly made of pearlitic steel with a corrosion-resistant coating that is resistant to the environment and the working environment and decontamination solutions. Some elements (moving parts and guides) of the device can be made of austenitic or high-chromium steels. Elements made of austenitic or high chromium steels are not coated.

All other parts of the device are made of moisture-resistant materials long-term resistant to relative humidity up to 100% at temperatures up to 50 ° C.

Implementation of a utility model.

A device for changing and installing aerosol filters of a nuclear power plant works as follows. (See FIG. 2).

Stage A1. If necessary, replace the filters raise the protective plate 20, clinging it to the eyebolts, providing the ability to remove the filters.

Stage A2. Waste filters are pressed using the spin mechanism.

Stage A3. Raise the used filters using a filter hoist, removing them as they exit the opening. For lifting, use a winch, which is rotated by an electric motor or using a manual drive 26. A semi-automatic (remote) mode of operation of the winch electric drive is possible, in which the electric drive is started from the up, down buttons, and it is stopped from the stop button ". When reaching the highest position, the drive will automatically shut off to avoid overheating and failure of the winch motor.

Stage A4. Install new filters on the elevator 9, placing them on top of each other, gradually lowering the filter elevator.

Stage A5. Lower the filters to the calculated depth.

Stage A6. Filters are pressed in turn using the filter clamp mechanism to the support frame 1.

Stage A61. To do this, each filter is pressed separately using the corresponding clamp unit. For this, the rotation of the corresponding drive shaft 15 through the corresponding gear 14 is converted into the translational motion of the corresponding rotating screw shaft 19, mounted in the corresponding clamp housing 16. The screw shaft 19 presses the corresponding beam 17, which clamps the specified filter through the crosshead 18.

Stage A62-64. Repeat step A61 for each filter.

Stage A7. The degree of tightness / leakage of the filter seal is controlled, for example, according to the method of GOST 19823 using a device for monitoring the degree of tightness / leakage

The sequence of steps is approximate and allows you to rearrange, add or perform some operations at the same time without losing the ability to provide all the functions of the proposed device.

Industrial applicability.

The proposed device for changing and installing aerosol filters of a nuclear power plant can be implemented by a specialist in practice and, when implemented, ensures the fulfillment of the declared purpose. The feasibility of implementation by a specialist in practice follows from the fact that for each feature included in the utility model formula based on the description, the material equivalent is known, which allows us to conclude that the criteria for “completeness of disclosure” and “industrial applicability” for the utility model are met.

In accordance with the proposed utility model, the applicant carried out calculations of the design of the device for changing and installing aerosol filters of a nuclear power plant.

Design calculations showed that a device for changing and installing aerosol filters in a nuclear power plant can allow:

- to produce uniform pressure of each filter along the entire sealing plane to the support frame, that is, in the vertical and horizontal planes,

- increase the accuracy of the clamp of each filter separately,

- increase the speed of installation of filters.

All this, ultimately, ensures the achievement of the technical result achieved - improving the usability of the device while increasing the speed and accuracy of installation and uniformly pressing each filter along the entire seal plane to the support frame, which is most important when the filter is in a radioactive environment. Indeed, in this case, the utility model provides an increase in the filtration efficiency of the filtered medium and a decrease, that is, a decrease in the level of the filtered medium bypassing the filters, thereby reducing the level of radioactive contamination of the device elements and, as a result, the level of exposure to radiation on maintenance personnel when replacing the filters.

Claims (4)

1. A device for changing and installing aerosol filters of a nuclear power plant, including guides adapted for installation in a mine of a nuclear power plant, on which a filter hoist is mounted, connected by an electric winch, a support frame with a filter wringer and a filter clamp mechanism, mounted on a vertical support of the clamp mechanism characterized in that the filter clamp mechanism is made in the form of several independent clamp nodes, each of which is mounted on a vertical support of the clamp mechanism and adapted for clamping its filter in the vertical and horizontal planes. 2. The device according to claim 1, characterized in that each clamping unit includes an independent drive of the clamping unit, connected to an independent drive shaft of the clamping unit, connected to a converter for rotating the clamping shaft into translational movement of the rocker arm, which is adapted for mounting with a filter element through traverses. 3. The device according to claim 2, characterized in that the converter for rotating the clamping shaft into the translational movement of the rocker arm is made in the form of a gear transmission connected to a screw shaft located in the housing of the clamping unit. 4. The device according to claim 2, characterized in that the rocker and crossheads have a degree of freedom in two mutually perpendicular planes, ensuring uniform filter pressing across the entire seal plane.

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