RU2749348C1 - Sealed box for optical equipment and sealed panel for sealed box - Google Patents

Abstract

FIELD: laser technology.SUBSTANCE: group of inventions relates to large-size gas-filled housing structures for laser technology. The sealed box for placing the optical equipment contains a metal case and a power frame made in form of a single prefabricated-welded structure of hermetically fixed on the outer surfaces of the rods of the power frame of sealing panels, and the rods of the power frame, to which the sealing panels are attached, are welded to each other hermetically, and holes are formed for the fastening elements of the sealing panels on the outer surfaces of these rods, while the fastening elements of the optical equipment are made adjustable with possibility of linear and angular movement of each optical device separately.EFFECT: invention makes it possible to expand the operational capabilities of the sealed box.7 cl, 6 dwg

Description

The group of inventions relates to large-size gas-filled housing structures of laser technology and can be used in laser installations to accommodate optical equipment, which, according to operating conditions, must be in an environment different from the environment of the main room of the laser installation (filling with a special gas, a higher class of gas purity, etc.) .P.). Also, the structural elements of the box can be used in other fields of technology in cases where it is required to create a local sealed volume.

Known sealed box, presented in a multichannel physical installation NIF [Fusion science and technology, Vol 69, January / February 2016, Spaeth et al. NIF Laser description, p. 34-38,], which, in terms of technical and physical nature, is selected as the closest analogue. The presented sealed box contains a welded metal case with non-removable nodes for input / output of laser radiation, input of vacuum, gas lines, input of electrical and optical cables and a power metal frame with elements for fastening optical equipment. The metal case is equipped with adjustable support blocks with mounting plates in which grooves are made. The load-bearing metal frame is formed by rod and / or sheet elements connected to each other. The rod elements are made of pipes of square and / or rectangular and / or circular cross-section. The power metal frame with the optical equipment installed on it forms a "large optomechanical assembly unit" called a "replaceable linear unit", which is installed in a sealed metal case using a specially designed manipulator lift in the form of an "autonomously controlled robotic conveyor". Each has mounting elements that mate with the counter elements of the metal case.

The presented sealed box has the following disadvantages:

- has large weight and size characteristics, which is due to the implementation of a sealed metal body and a load-bearing frame in the form of separate structures;

- does not provide access to the optical elements installed in it for diagnostics, maintenance and replacement without dismantling a large optomechanical assembly;

- to dismantle a large optomechanical assembly, it is necessary to use special equipment in the form of a robotic conveyor;

- does not provide the possibility of linear and angular manual adjustment separately for each optical device installed in it;

- has a high cost, which is due to the high metal consumption and labor intensity of manufacture.

For a sealing panel for a sealed box, the panel presented in the article on a multichannel physical NIF installation [SPIE Digital Library, LLNL-JRNL-619472, February 20, 2013, The National Ignition Facility - Beam Area Increase, S.C. Burkhart, A. Awwal et al, p. 15] and made in the form of a metal sheet with stiffening ribs and with holes formed along the perimeter at a predetermined distance from its edge for fasteners and handles installed on the front side, and with a sealing gasket on the back.

The disadvantages of the presented sealing panel are:

- large mass due to the large thickness of the sheet of the sealing panel, as well as the presence of additional parts in the form of stiffeners;

- high cost due to high metal consumption, the presence of additional parts in the form of stiffeners, and a large volume of machining.

- protrusion of handles beyond the size of the panel from the front side, which increases the overall size of the structure.

The technical result of the invention consists in expanding operational capabilities by reducing the weight and size characteristics and providing access to each element separately for its diagnostics, maintenance, replacement, manual adjustment, as well as reducing manufacturing costs by reducing metal consumption and labor intensity.

The technical result is achieved by the fact that in a sealed box for placing optical equipment, containing a metal case with nodes for input / output of laser radiation, input of vacuum, gas mains, input of electrical and optical cables, with adjustable support blocks with mounting plates, in which mutually perpendicular grooves, and a load-bearing frame made of rods of square and / or rectangular cross-section, connected to each other, with fastening elements of the optical equipment to be placed, it is new that the metal body and the load-bearing frame are made in the form of a single prefabricated-welded structure of hermetically fixed the outer surfaces of the rods of the load-bearing frame of the sealing panels, moreover, the rods of the load-bearing frame, to which the sealing panels are attached, are welded together hermetically, and holes are formed for the fastening elements of the sealing panels on the outer surfaces of these rods, while the elements are attached The optical equipment is made adjustable with the possibility of linear and angular movement of each optical device separately.

In addition, the attachment elements of the placed optical equipment can additionally be equipped with retractable equipment loading elements. The mutually perpendicular slots of the mounting plates of the support blocks can be made T-shaped, and the nodes for input / output of laser radiation, input of vacuum, gas lines, input of electrical and optical cables can be made removable using flange connections and sealing means.

In a sealing panel for a sealed box, the technical result is achieved by the fact that, along with the features common to the prototype, namely: with a metal sheet with holes for fastening elements formed along the perimeter at a given distance from its edge and handles installed on the front side, and on the back - a sealing gasket, new ones are included, namely: in its middle part, on the back side, at least one unloading element with adjustment means is installed, providing an additional attachment point on the power frame of the sealed box, when installing more than one unloading element, their location is determined by calculation from the condition of the same deformation in different zones of the metal sheet, and the handles are made without protruding beyond the overall size of the panel from the front side.

In addition, in the sealing panel, the unloading element can be made in the form of a sleeve or a plate bent at an angle, partially covering the load-carrying frame of the sealed box, or a counter-element mounted on the load-bearing frame. The metal sheet along the perimeter can be reinforced with a corner profile, the height of which, taking into account the thickness of the sheet, is selected from the condition of compression of the sealing gasket 25-40%.

The influence of the distinctive features of the patent formula of a sealed box for placing optical equipment on the technical result.

The execution of a metal body and a power frame in the form of a single prefabricated-welded structure of sealing panels hermetically fixed on the outer surfaces of the rods of the power frame allows to reduce the weight and size characteristics of the box, to provide access to each device separately for its diagnostics, maintenance and replacement without the use of special equipment, which expands operational capabilities, as well as reduce manufacturing costs by reducing metal consumption, the length of welds and the amount of machining.

Tight welding of rods of a square and / or rectangular cross-section of the load-bearing frame to each other, to which the sealing panels are attached and the formation of holes for fasteners of the sealing panels on the outer surfaces of the rods of the load-bearing frame allow to ensure the minimum number of parts, welds and the amount of machining, which has a positive effect on achieved technical result.

The implementation of the fastening elements of the placed optical equipment adjustable with the possibility of linear and angular movement allows for the adjustment of each optical device installed in the box separately, which also expands the operational capabilities of the device.

Additional equipping of a sealed box with retractable elements for loading equipment makes it possible to simplify the installation of optical devices of large mass and dimensions into the box, which also has a positive effect on the technical result.

The execution of the mutually perpendicular slots of the mounting plates of the support blocks as T-shaped provide the convenience and speed of mounting the sealed box on the supporting surface.

The design of the nodes for the input / output of laser radiation, the input of vacuum, gas lines, the input of electrical and optical cables are removable, using flange connections and sealing means, which allows quick replacement of these units on site in case of possible damage or when the composition of the equipment placed in the box changes. , which also affects the achieved technical result.

Influence of the distinctive features of the patent formula of the sealing panel for a sealed box on the technical result.

Installation in the middle part of the sealing panel on the back side of at least one unloading element with adjustment means, providing an additional attachment point on the load-bearing frame of the sealed box, allows, in terms of strength and rigidity, to significantly reduce the thickness of the panel sheet and avoid the introduction of stiffeners, partially remove load from the fasteners, to ensure the unambiguity of the installation of the sealing panel on the load-bearing frame, as a result of which the operational characteristics are improved due to the lower mass and ease of installation of the panel and the cost is reduced by reducing the metal consumption and the volume of machining.

Determining, when installing more than one unloading element, their location in a calculated way from the condition of the same deformation in different zones, allows you to choose the most optimal thickness of the panel sheet, which also affects the achieved technical result.

The implementation of the handles without protruding beyond the overall size of the panel from the front side allows to ensure the minimum overall dimensions of the sealed box, as well as to ensure greater safety of personnel during operation.

Execution in the sealing panel of the unloading element in the form of a sleeve or an angle-bent plate, partially covering the load-carrying frame of the sealed box, or a counter-element mounted on the load-bearing frame, are the most optimal options in terms of manufacturing and convenience during subsequent assembly.

Installation of an angle profile along the perimeter of a metal sheet, the height of which, taking into account the thickness of the sheet, is selected from the condition of compression of the gasket of 25-40%, allows locally, without increasing the thickness of the sheet, to increase the rigidity of the panel in the places of installation of fasteners, and also limits the degree of compression of the gasket. thereby providing the necessary conditions for its work.

Consider the implementation of the proposed group of inventions presented in Fig. 1-5.

FIG. 1 - a fragment of a sealed box with a removed sealing panel;

FIG. 2 - a fragment of a sealed box in section;

FIG. 3 - a variant of a removable laser radiation input-output unit (a), input of a vacuum or gas main (b), input of electric cables (c);

FIG. 4 - sectional support block;

FIG. 5 - unloading element in the form of a sleeve (a) and a plate bent at an angle (b);

FIG. 6 - handle of the sealing panel.

In the figures, the positions indicate:

1 - power frame;

2 - sealing panel;

3 - support blocks;

4 - fastening elements of optical equipment

5 - a sheet of a sealing panel;

6 - corner profile of the sealing panel;

7 - gasket of the sealing panel;

8 - fasteners of the sealing panel;

9 - means for sealing the removable unit;

10 - fasteners of the removable unit;

11 - reinforcing strip of the removable unit;

12 - flange;

13 - pipeline with a flange;

14 - connector panel;

15 - bottom mounting plate;

16 - top mounting plate;

17 - T-bolt;

18 - unloading element;

19 - means of adjustment.

The sealed box for placement of optical equipment includes a metal case that limits the internal sealed volume of the box, formed by a load-bearing frame 1 and sealing panels 2 fixed on it, and is a prefabricated welded structure (see Fig. 1).

The metal case is made with removable nodes for input-output of laser radiation (see Fig. 3a) and / or input of vacuum and gas lines (see Fig. 3b) and / or input of electrical and optical cables (see Fig. 3c). Removable units are made using flange joints and sealing gaskets 9. The laser radiation input-output unit includes a flange 12, a sealing gasket 9, a reinforcing strip 11 and fasteners 8, and is intended for joining a box with a sealed light guide or sealed installation of an optical element on panel of a sealed box (see Fig. 3a). The unit for introducing a vacuum or gas includes a pipeline with a flange 13, a sealing gasket 9, a reinforcing strip 11 and fasteners 8 (see Fig. 3b). The unit for entering electrical and optical cables is designed to provide remote automatic operation of equipment placed in the box, includes a panel of connectors 14 with sealed pass-through connectors, a gasket 9, a reinforcing strip 11 and fasteners 8 (see Fig. 3c). In this case, the connectors are located in a recess formed by the connector panel 14, the sealing gasket 9, the reinforcing strip 11, and can be closed with a protective cover, which significantly reduces the likelihood of damage and contamination.

The power frame 1, which ensures tightness, strength and rigidity of the box structure, is made of rods of square and / or rectangular cross-section, connected by welding. The rods are made of standard pipes made of steel or aluminum alloys, they can be protected after welding with a paint and varnish or other coating, they are selected subject to the condition of sufficient strength and rigidity of the structure, as well as depending on the specific operating conditions, purpose, etc.

On the outer surfaces of the rods of the power frame 1, to which the sealing panels 2 are attached, holes are formed for the fasteners 8 of the sealing panels 2. The holes are made outside the zones limited by the dimensions of the sealing gaskets 7 of the sealing panels 2 and can be threaded or smooth, with the subsequent installation of "nut »Rivets, for the case when the threaded hole made in the pipe wall of the load-bearing frame 1 does not meet the strength conditions. Thus, the internal cavities of the pipes, to which the sealing panels 2 are attached, communicate with the environment through the holes, that is, these pipes must be welded together hermetically. It should be noted that making through holes in the walls of the pipes of the load-bearing frame 1, to which the sealing panels 2 are attached, in zones other than the zones described above, is not allowed, since the tightness of the frame in this case will be lost (see Fig. 2). The rods of the load-bearing frame, to which the sealing panels 2 are not attached, do not require hermetic welding and allow holes to be made in them without restrictions, since they are entirely located in the inner hermetically sealed volume of the box.

To ensure the operating conditions of the sealing gaskets 7 of the sealing panels 2 in the places where they are joined with the load-bearing frame 1, it is necessary to ensure the surface roughness of the rods of the load-bearing frame 1 is not more than Ra 2.5 μm. At the same time, as a rule, the pipes in the state of delivery have not the worst surface roughness, therefore, mechanical treatment of the surfaces of the rods of the load-bearing frame 1 after welding is not required in most cases, with the exception of removing the reinforcement of the welded seams with the corresponding roughness at the joints of the load-bearing frame 1 with gaskets 7 sealing panels 2.

Adjustable support blocks 3 with mounting plates with T-shaped slots also include screws with spherical support surfaces, support flanges counter to the screws, backlash extraction elements and attachments to the support surface, installed on the corresponding counter welded elements of the load-bearing frame 1.

The fastening elements of the optical equipment 4 are adjustable, with the possibility of linear and angular movement of each optical device separately, they are installed on the corresponding counter-welded elements of the load-bearing frame 1 (see Fig. 1).

Additionally, the sealed box is equipped with pull-out elements (not shown in the figure) for loading equipment, made in the form of telescopic rods with fastening elements for the corresponding devices.

Sealing panel 2 for a sealed box in the simplest case includes a metal sheet 5, standard corner section profiles 6, which are fixed to the metal sheet 5 along the perimeter from the front side by means of contact or other types of welding (tightness of welds is not required), a sealing gasket 7 from a rubber profile, glued around the perimeter from the back side at a given distance from the edge of the sealing panel 2. The height of the corner profile 6, taking into account the thickness of the metal sheet, is selected from the condition of compression of the sealing gasket 7 25-40%. It should be noted that after welding, machining of the metal sheet 5 or the corner profile 6 of the sealing panel 2 is also not required in most cases. Along the perimeter of the sealing panel 2 at a predetermined distance from its edge, holes are formed for fastening elements 8, which are used for convenience with captive screws.

Sealing panels 2, intended for servicing equipment installed in a sealed box, are equipped with handles, which are made without protruding beyond the overall size of the sealing panel 2 from the front side and are a disk with a shoulder and a recess for fingers, mounted on a metal sheet 5 of the sealing panel 2 is hermetically sealed by welding or otherwise (see Fig. 6).

Large-sized sealing panels are equipped with one or more unloading elements 18 with adjustment means 19 (see Fig. 5) in the form of screws or parts with grooves located in the middle part of the sealing panel 2 on the back side and providing an additional attachment point, convenience and unambiguous installation of the panel on the power frame 2 sealed boxes. The number of unloading elements 18 is determined by the permissible deformation of the panel under the action of a given excess pressure at a given thickness of the metal sheet 5, which in turn is selected structurally, taking into account manufacturing and operation. When installing more than one unloading element, their location is determined by calculation from the condition of the same deformation in different zones of the metal sheet.

The unloading element 18 is made in the form of a sleeve (see Fig.5a) or a plate bent at an angle (see Fig.5b), partially covering the load-bearing frame 1 of the sealed box, or a mating element mounted on the load-bearing frame 1.

Consider the operation of a sealed box. After comprehensive preparatory work, the sealed box is installed at the site of operation in the design position using support blocks 3, which allow linear and angular adjustment of the box position, as well as its rigid fixation. At the same time, first, the lower mounting plates 15 with T-shaped slots from the set of support blocks 3 are attached to the base, then a load-bearing frame 1 with pre-installed sealing panels 2 and support blocks 3 with upper mounting plates 16 with T-shaped slots is installed on them. After that, using the support blocks 3, the position of the sealed box is adjusted, the backlash is sampled and fixed with T-shaped "machine" bolts 17, the heads of which are inserted into the corresponding open T-shaped slots of the upper mounting plates 16, rotated 90 °, passed into T- the shaped grooves of the lower mounting plates 15 are turned clockwise until they stop and are fastened with nuts (see Fig. 4). Dismantling is carried out in the reverse order.

At the next stage, sealed light guides are attached to the input-output nodes of laser radiation (see Fig. 3a) of the metal body of the sealed box, or the units of optical windows are hermetically installed, "external" connections to the input nodes of vacuum and / or gas lines are made (see Fig. 3b) and / or nodes for input of electrical and optical cables (see Fig. 3c).

Installation of devices in a sealed box is carried out using the loading means after dismantling the required number of sealing panels. Manual linear and angular adjustment, fixation of devices is carried out using adjustable fixing elements. This is followed by "internal" connections of devices to the input nodes of vacuum and / or gas lines (see Fig. 3b) and / or the input nodes of electrical and optical cables (see Fig. 3c) and check for tightness and operability.

The fastening of the previously removed sealing panels 2 is carried out with screws 8, which, when tightened, generate a force, as a result of which sealing occurs due to the deformation of the sealing gasket 7. The screws 8 are tightened until the edge of the corner profile 6 of the sealing panel 2 comes into contact with the surface of the load-bearing frame 1. When filling the airtight of the box with gas under excess pressure, the panel experiences a load, under the action of which its deformation occurs, which in the area of the unloading element 18 reaches the design mounting gap between the unloading element 18 and the frame counterpart, equal to 1-2 mm, after which the unloading element 18 of the panel enters into engagement with the counterpart of the frame, thereby preventing further deformation of the panel in the area of the unloading element 18 and significantly, up to several tens of times, reducing the amount of deformation in other areas.

The enterprise carried out design development and manufactured a series of prototypes of sealed boxes of various sizes. The prototypes were tested for strength and tightness, the operation of mechanisms and systems was tested. According to the test results, the boxes confirmed the declared technical characteristics and were accepted into operation. Thus, the proposed invention made it possible to expand the operational capabilities by reducing the weight and size characteristics and providing access to each element separately for its diagnostics, maintenance, replacement and manual adjustment, as well as reducing manufacturing costs by reducing metal consumption and labor intensity.

Claims (7)

1. A sealed box for placing optical equipment, containing a metal case with nodes for input / output of laser radiation, input of vacuum, gas lines, input of electrical and optical cables, with adjustable support blocks with mounting plates in which mutually perpendicular grooves are made, and a power frame , made of rods of square and / or rectangular cross-section, connected to each other, with fastening elements of the placed optical equipment, characterized in that the metal case and the power frame are made in the form of a single prefabricated-welded structure of hermetically fixed on the outer surfaces of the rods of the power frame of sealing panels , moreover, the rods of the power frame, to which the sealing panels are attached, are welded to each other hermetically, and holes are formed for the fastening elements of the sealing panels on the outer surfaces of these rods, while the fastening elements of the optical equipment are made adjustable and with the possibility of linear and angular movement of each optical device separately. 2. A sealed box according to claim 1, characterized in that it is additionally equipped with pull-out elements for loading equipment. 3. A sealed box according to claim 1, characterized in that the mutually perpendicular grooves of the mounting plates of the support blocks are T-shaped. 4. Sealed box according to claim 1, characterized in that the nodes for input / output of laser radiation, input of vacuum, gas lines, input of electrical and optical cables are made removable using flange connections and sealing means. 5. Sealing panel for a sealed box, including a metal sheet with holes for fasteners formed along the perimeter at a given distance from its edge and handles installed on the front side, and with a sealing gasket on the back, characterized in that in its middle part on the back side installed, but at least one unloading element with adjustment means, providing an additional attachment point on the power frame of the sealed box, when installing more than one unloading element, their location is calculated from the condition of the same deformation in different zones of the metal sheet, and the handles are made with no protrusion for the overall size of the panel from the front side. 6. Sealing panel according to claim 5, characterized in that the unloading element is made in the form of a sleeve or an angled plate, partially covering the load-carrying frame of the sealed box or a counter-element mounted on the load-bearing frame. 7. A sealing panel according to claim 5, characterized in that an angle profile is installed along the perimeter of the metal sheet, the height of which, taking into account the thickness of the sheet, is selected from the condition of compression of the sealing gasket of 25-40%.

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