Method of modernisation of rectangular undetachable chambers of air cooling machine sections

FIELD: technological processes.

SUBSTANCE: invention may be used in modernisation of horizontal machines of air cooling with heat exchanging sections that have welded undetachable chambers of rectangular shape. In the back wall chambers form at least one window for access to internal surface of pipes and their cleaning from the products that have been accumulated in the process of air cooling machines operation. The window has circular shape or shape of two circles joined to each other. Centre of circle coincides with axis of one of the openings of tubular grid. Centres of two circles coincide with axes of corresponding openings of tubular grid. Mentioned windows are covered with shields with sealing gaskets made of soft metal or soft nonmetal gasket material. Shields are fixed with the help of threaded plugs that are installed in the openings of back wall, which are closer to the shields.

EFFECT: increase of servicing convenience and machines reliability and increase of service life.

4 cl, 2 dwg

 

The invention relates to the field of power engineering and can be used for modernization of the equipment used, in particular horizontal air cooler with heat-exchange sections with welded all-in-one camera rectangular shape.

Such devices are designed for condensing and cooling the vaporous, gaseous and liquid media in technological processes of oil refining, petrochemical and chemical industries. Use of these devices at a gas pressure exceeding 6.4 MPa.

Rectangular all-in-one camera section horizontal air cooler consists of a tube, the holes which are fixed the ends of heat exchange tubes, the top, bottom and end walls, a back wall with the screw holes in which are mounted the threaded tube, and partitions, welded to the tube sheet holes and the rear wall (Technical conditions TU 26-02-1158-96, AIR COOLING UNITS HORIZONTAL, Registered in the State Committee of standards 07.03.1996).

In some cases, during operation of such devices for air cooling it is necessary to clean the internal surfaces of pipes and camera produced by the apparatus of the dirt that is difficult due to the implementation of all-in-one camera. Threaded tube mounted opposite the heat exchange tubes, do not provide free access to the tool used for cleaning, all cleaning surfaces and removing the products removed from the camera that significantly reduces the life of the camera.

The technical task of the present invention is to improve the maintainability of the sections of the air cooling apparatus in the course of their operation, increased reliability and increased lifetime.

For task upgrade rectangular one-piece camera horizontal sections of the air cooling apparatus consisting of a tube with holes for attaching them to the ends of heat exchange tubes, the top, bottom and end walls, a back wall with holes and installed threaded tubes arranged coaxially to the pipe, and partitions, welded to the tube sheet holes and the rear wall includes performing in rear all-in-one camera, at least one window for accessing the inner surface of the chamber and cleaning them from the products formed during operation of the air cooling apparatus, having the form of a circle with center, coinciding with the axis of one of the holes of the tube, or paired between two circles with centers, sovpadali and with the axes of the respective holes tube, installation on these window panels with sealing gasket and fixing pads located around the through window adjacent the threaded tubes, with use of a sealing strip of soft metal or soft non-metallic cushioning material.

The gasket of soft metal perform with a hole corresponding in shape and size of the window in the back wall, and protrusions with holes threaded tube.

The gasket of soft non-metallic cushioning material performed by the form overlay.

As a soft, non-metallic cushioning material can be used paronite.

The invention is illustrated by drawings, where figure 1 schematically shows a rectangular one-piece Luggage section of the air cooler;

figure 2 - the same view As in figure 1.

The method is as follows.

The camera section of the air cooler consists of a tube 1, the top wall 2, bottom wall 3, end wall 4, rear wall 5 and the partition 6, welded to the rear wall 5 and the tube sheet holes 1. Pipe grid 1 has holes for attaching them to the ends of heat exchanger tubes 6, and the rear wall 5 holes 7 located coaxially to the pipe and intended for the passage of the tool, while fixing all labor and cleaning. The aforementioned threaded holes plugged tubes 8. To provide better access to the inner surface of the pipes when they are cleaned from deposits formed during operation, the rear wall perform at least one window 9 having the shape of a circle with its center coinciding with the center of the orifice tube, or paired between the at least two circles with centers coincident with the centers of the holes of the tube. Open 9 close the plates 10 with the sealing strips 11 and fix the screw tubes 8 arranged around the Windows.

In the case of operation of the air cooler at a pressure in excess of 6-8 MPa, using a sealing strip in the form of a plate of soft metal, such as aluminum, copper, Armco iron. These plates have a hole 12, the shape and dimensions corresponding to the window 9 in the rear wall, and a recess 13 with holes threaded tube through which secure the cover plate 10. This form of sealing strip is selected from the conditions for reducing the contact area with the rear wall and increase the contact pressure.

When the air cooler with a pressure lower than 6-8 MPa, it is preferable to use a sealing strip of soft non-metallic cushioning m the material, for example, paronite. In this case the lining completely covers the surface of the cover and completely attached to her.

If necessary, clean the inside surface of the pipe and all-in-one camera Unscrew the ring screws engaged in the mounting plates, and remove the latter. Through the window in the back wall of the chamber is provided unfettered access to the inner pipe surface and the inner surface of the chamber walls and the removal of cleaning products.

The claimed invention allows to extend the life of the sections of the air cooling apparatus having a welded all-in-one camera.

1. Upgrade rectangular one-piece cameras sections of the air cooling apparatus consisting of a tube with holes for attaching them to the ends of heat exchange tubes, the top, bottom and end walls, a back wall with holes and installed threaded tubes arranged coaxially to the pipe, and partitions, welded to the tube sheet holes and the rear wall, characterized by the fact that they perform in the rear all-in-one camera, at least one window for accessing the internal surface of the pipes and clean them from the products formed during operation of the air cooling apparatus having the shape of a circle with its center coinciding with the axis of one of the holes TRU is Noah lattice, or paired between the two circles with their centers coinciding with the axes of the respective holes tube, carry out the installation of these window panels with sealing gasket and fixing pads located around the through window adjacent the threaded tubes, with use of a sealing strip of soft metal or soft non-metallic cushioning material.

2. The method according to claim 1, characterized in that the gasket of soft metal perform with a hole corresponding in shape and size of the window in the back wall, and protrusions with holes threaded tube.

3. The method according to claim 1, characterized in that the gasket of soft non-metallic cushioning material performed by the form overlay.

4. The method according to claim 3, characterized in that as a soft, non-metallic cushioning material used paronite.



 

Same patents:

FIELD: heat exchange apparatus; chemical industry and power engineering.

SUBSTANCE: proposed heat exchange header has body and distributor secured in it and made in form of honeycomb with cells containing one raw of electric rollers secured between bounding grates located at distance exceeding five ball diameters. Provision is made for automatic adjustment relative to external change of flow velocity with no consumption of energy for control and no consumption of liquid in case of change in inlet pressure.

EFFECT: enhanced efficiency.

5 dwg

FIELD: engine engineering.

SUBSTANCE: radiator section comprises sectional collectors made of heads (branch pipes) and lids, tube bank with flat-oval tubes that are set and soldered into the openings of the tube boxes with a stannic-lead solder, finned plates soldered to the flat-oval tubes with a stannic-lead solder, top and bottom tube boxes whose outer edges are flanged toward the collectors according to the shape and the sizes of the cross-section of the tube bank, and temperature deformation compensators.

EFFECT: simplified structure.

3 dwg

FIELD: engine engineering.

SUBSTANCE: radiator section comprises bank of flat-oval tubes that are set and soldered into the openings of the top and bottom tube boxes, finned plates, and collectors. The ends of the flat-oval tubes diverge outward. The tube boxes are provided with openings with flanges mating to the outwardly diverging ends of the flat-oval tubes. The tubes are soldered to the tube boxes. According to the other version, the tube boxes are sectional and made of main tube boxes with the openings and hollows arranged over periphery or along the boxes and spacing shaped bushings. The ends of the tubes are soldered to the spacing shaped bushings with a zinc solder.

EFFECT: enhanced reliability and efficiency.

2 cl, 5 dwg

FIELD: heat engineering, particularly air inlet and outlet headers for exhaust gas heat recovery devices, particularly for devices to heat air with exhaust combustion products from compressor of gas-turbine plant used in gas-transfer devices for compressor stations of gas main pipelines.

SUBSTANCE: method involves cutting metal sheets into case blanks; folding and welding the blanks to create header body preferably having cylindrical shape; cutting orifice for tube plate installation into the case, wherein orifice edges define contour of cylindrical rectangle having height of 0.72-0.95 of header height in heat-exchanging unit and with angular width equal to 0.07-0.25 of header case cross-sectional perimeter; cutting out tube plate; beveling thereof and forming orifices in the tube plate, wherein summary orifice area is equal to 0.52-0.81 of total tube plate area; welding tube plate to above header case orifice edges so that orifice edges are arranged within the bounds of tube plate contacting the edges.

EFFECT: increased manufacturability, reduced metal consumption along with improved structural rigidity thereof, simplified production and decreased labor inputs.

13 cl, 5 dwg

FIELD: power engineering, particularly gas cooling equipment.

SUBSTANCE: method involves producing least two intermediate header body sections provided with orifices adapted to receive connection pipes having flanges to connect thereof with gas inlet or outlet chambers of heat-exchanging section of the gas air-cooling plant; manufacturing end body members shaped as doubly curved bottoms; producing flanges with connection pipes; assembling and welding header body and welding bottoms to intermediate sections of header body. Header body is created by joining intermediate sections to central cylindrical one to form T-member having two coaxial cylindrical parts adjoining intermediate sections and having diameters of not less than intermediate section diameters. Adjoined to above cylindrical parts is the third cylindrical part adapted to be connected to gas pipeline. The third cylindrical part is inclined substantially at 90° to above cylindrical parts and extends substantially at 90° to plane passing through vertical axes of the connection pipes of intermediate sections. Diameter of the third cylindrical part is equal to 0.81-1.10 diameters of cylindrical body part. Technological support to facilitate manufacture of gas inlet and outlet header body or header body sections has frame with at least two support members, namely with support plates arranged from both sides from medium vertical plane of housing body to be produced and spaced apart from longitudinal axis thereof to support contact points in lower body half for radial distance corresponding to outer body radius. Each support member comprises not less than one flat part tangential to corresponding radius and arranged to be supported along cylindrical body section generator or cylindrical body part generator so that above radius is spaced an angular distance equal to 15-75° from vertical line in plane transversal to the generator in both opposite directions beginning from lower point of cross-section of the body or body section preferably shaped as solids of revolution.

EFFECT: increased manufacturability, reduced labor inputs and material consumption for header components assemblage, increased quality, reliability and service life of header characterized with elevated internal pressure due to optimized parameters of header body sections and technological supports, increased assemblage accuracy and improved header body stability during boring operations performing.

18 cl, 5 dwg

FIELD: heat and power engineering, namely tube walls of inlet or outlet chambers of apparatus for air cooling of gas or section of such apparatus.

SUBSTANCE: tube plate of chamber of gas inlet or gas outlet of heat exchange section of apparatus for air cooling of gas includes plate in the form of parallelepiped, mainly right-angled one. Said plate includes system of through openings for ends of heat exchange tubes of tube bundle. Said openings are arranged by rows along height of wall at pitch of their axes in row being in range (1.7 - 3.4) d; at pitch of rows along height of wall being in range (1.6 - 3.4)d where d - diameter of openings. Said openings are shifted in adjacent rows by value 0.35 -0.65 of pitch in row. Projection of surface area of wall carcass onto mean plane of tube wall exceeds by 4 - 12.5 times projection of total surface area of voids of wall on the same plane. Portion of continuous cross section is arranged along perimeter of tube wall for forming rigidity band of tube wall. Surface area of rigidity band consists 16.0 - 45.0% of tube wall surface area.

EFFECT: enhanced strength, lowered metal consumption of construction due to optimal parameters of tube wall.

10 cl, 3 dwg

FIELD: engineering of collectors for injection or drainage of gas for apparatuses for air-based gas cooling.

SUBSTANCE: device has bearing frame, on which not less than three cradle supports are mounted for supporting body of collector for injection or drainage of gas and for abutment of branch pipe connected thereto for connection to gas main, and no less than four portal supports for temporary technological holding by plane, rotation angle and position along collector for injection or drainage of gas of branch pipes with flanges for connection to chambers for inlet or outlet of gas of heat-exchange sections of air-based gas cooling apparatus adequately to position of contact surfaces of response flanges and mounting apertures in them in chamber for inlet or outlet of gas. At least two cradle supports are positioned with possible abutment of body of collector for injection or drainage of gas against them in accordance to suspension scheme, each one primarily between additional pair of portal supports, mounted below outmost and adjacent flanges of branch pipes for connection to chambers for inlet or outlet of gas. Each portal support is made with detachable beam, which is provided with device for temporary holding by plane and rotation angle of flange of appropriate branch pipe and for connection of it to body of collector for injection or drainage of gas in planned position.

EFFECT: simplified construction of building berth while providing for high precision of manufacturing of collector for drainage or injection of gas.

4 cl, 4 dwg

FIELD: power engineering, particularly gas cooling plant components.

SUBSTANCE: gas inlet or outlet chamber is made as a high-pressure tank and comprises side, upper, lower and end walls. Gas inlet or outlet chamber also comprises not less than two load-bearing partitions arranged between side walls and provided with through orifices. One chamber wall is made as tube plate with orifices defining grid structure and adapted to receive heat-exchanging tube ends. One chamber wall has orifices to receive pies to connect thereof with gas inlet or outlet manifold, which supplies gas to or discharges gas from the chamber. Orifices for connection pipe receiving, load-bearing partition orifices and tube plate orifices define communication system to connect gas air cooling plant with gas pipeline. The communication system has several stages with orifices formed so that orifice number at each stage successively changes in gas flow direction. For gas inlet chamber above number increases, for gas outlet chamber the number decreases.

EFFECT: possibility to equalize velocity field, reduced hydraulic hammer, which results in reduced power losses in pipeline conveying gas to be cooled and in increased thermal performance of air cooling plant as a whole or air cooling plant section, increased economy of plant production and operation.

3 dwg, 13 cl

FIELD: power engineering, in particular, heat exchange devices, primarily, air-based gas cooling apparatuses.

SUBSTANCE: device is made in form of reservoir working under pressure, including cylindrical body with end portions of two-side curvature, central branch pipe for connection to gas main and branch pipes for connecting to chambers for inlet or outlet of gas of heat-exchange sections of air gas cooling apparatus, while cylindrical body is made of technological sections, central one of which is made primarily in form of unified technological element with central branch pipe, and branch pipes for connection to chambers for inlet and outlet of gas of heat exchange sections of air gas cooling apparatus are mainly symmetrically positioned on both sides from central technological section and number of these branch pipes on each side ranges from 2 to 8, while the area of cross-section in light of central branch pipe is 0,7-1,0 of area of cross-section in light of cylindrical portion of body of collector fro injection or drainage of gas, and total area of cross section in light of branch pipes for connection to chamber for inlet or outlet of gas of each heat-exchange section of air-based gas cooling apparatus is 0,37-0,62 of area of cross-section in light of cylindrical portion of body of collector for injection or drainage of gas.

EFFECT: decreased metal cost of gas injection or drainage collector and higher manufacturability of its construction, and also decreased hydraulic losses in collector for injection or drainage of gas.

3 dwg, 7 cl

FIELD: power engineering, in particular, engineering of collectors for devices for utilization of gases exhausted by apparatuses primarily used for heating air by combustion products, coming from compressor of gas-turbine plant of gas flow apparatus at compressor stations of main gas pipelines.

SUBSTANCE: air injection or drainage collector of heat exchange block of heat-exchange apparatus like regenerative air heater is made in form of cylindrical ring with opening, in which additional pipe board is welded, while projection on end of pipe board of curvilinear portion of ring, forming an end of opening, is positioned within limits of thickness of pipe board, connection of ring to pipe board in plane of ring cross-section is made within angular range γ=28°-75°, and relation of projection area on aforementioned plane of curvilinear ring portion, forming an end of opening, to projection area on this plane of appropriate end of pipe board, is 0,048-0,172.

EFFECT: decreased mass of construction, high manufacturability of same, possibly lower laboriousness of manufacture, high durability of injection and drainage collector and reliability of its operation due to higher rigidity of construction.

5 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building and to machining, in particular. The method includes machining the workpiece surface layer with a cutting-tool with one rectilinear cutting edge and a plastic deformation of machined layer leaving it on the workpiece surface. Here, the tool with a cutting edge width greater than or equal to the width of the layer being machined makes a working motion perpendicular to the machined layer bend line in a plane aligned with its back surface and to the height of bent layer 1. Now, the machined layer gets bent and the tool returns to its initial position, then the tool or the workpiece is shifted by the machining cycle value and the cycle is ready to be repeated. To improve processing potentialities, prior to bending, the cutting tool is moved in the direction parallel to its forward surface up to the height of (0.4...0.6)l.

EFFECT: improved processing potentialities.

2 cl, 15 dwg

FIELD: processes for assembling of shell-and-tube heat exchangers in power engineering, petroleum processing, petroleum chemical, chemical, gas and other branches of industry.

SUBSTANCE: method involves assembling carcass by joining with the help of tightening devices and bypass preventive strips of tube and spacer grates; assembling tube bundle by packing carcass with heat-exchanging tubes; fixing heat-exchanging tubes in tube grates while embedding their ends and assembling tube bundle with shell made in the form of cylindrical enclosure, with tube bundle assembling process being performed before assembling thereof with shell. Shell used is of the type consisting of at least two parts produced by cutting cylindrical enclosure along generatrix thereof. Transverse strips are welded to shell part at sites corresponding to position of spacer grates. Tube bundle is assembled with shell by mounting onto tube bundle of shell parts to thereby define hermetically sealed volume of intertubular space. Shell parts are welded to one another and to tube grates, said welding process being performed provided that welded joints are positioned between parts of shell along longitudinal axis of heat exchanger.

EFFECT: simplified assembling process and increased heat exchange efficiency of shell-and-tube heat-exchanger.

4 cl, 18 dwg, 1 ex

FIELD: heat and power engineering, possibly manufacture of modules to apparatuses for recovery heat of waste gases of aggregates, for example for heating air by means of exhaust combustion products of compressor of gas turbine plant of gas pumping aggregate in compressor stations of main gas conduits.

SUBSTANCE: method comprises steps of piece-by-piece making blanks of shells of housings of manifolds for supplying and removing hated air, tubes, tube walls, module carcass members; bending tubes for producing flatly bent tubes having successively changed parameters of their branches and connection elbows; molding bent tubes; assembling manifolds at welding into them tube walls; mounting module carcass and manifolds; inserting tube bundle into module and again molding it together with manifolds inside module. Blanks of shells of manifold housings are prepared by cutting out metallic sheet for their further bending and welding. In prepared, mainly cylindrical blank rectangular port is formed for placing tube wall. Height of said port consists 0.72 - 0.95 of manifold height in module; its angular width consists of 0.07 - 0.25 of cross-section perimeter of shell of manifold. In tube wall openings are formed for creating tube field with surface area consisting 0.52 - 0.81 of common surface area of its frontal surface. At inserting tube bundles tubes are arranged by rows along height; distance between lengthwise axes of tubes in adjacent rows consists 0.6 - 1.5 of tube diameter. In rows adjacent by height tubes are shifted by 0.4 - 0.6 of pitch between lengthwise axes of rectilinear branches of tubes in row. Pitch consists of 1.5 - 2.3 of tube diameter.

EFFECT: enhanced technological effectiveness, lowered metal consumption, increased rigidity of product produced according to such method.

11 cl, 8 dwg

FIELD: power engineering, particularly gas cooling equipment.

SUBSTANCE: method involves producing least two intermediate header body sections provided with orifices adapted to receive connection pipes having flanges to connect thereof with gas inlet or outlet chambers of heat-exchanging section of the gas air-cooling plant; manufacturing end body members shaped as doubly curved bottoms; producing flanges with connection pipes; assembling and welding header body and welding bottoms to intermediate sections of header body. Header body is created by joining intermediate sections to central cylindrical one to form T-member having two coaxial cylindrical parts adjoining intermediate sections and having diameters of not less than intermediate section diameters. Adjoined to above cylindrical parts is the third cylindrical part adapted to be connected to gas pipeline. The third cylindrical part is inclined substantially at 90° to above cylindrical parts and extends substantially at 90° to plane passing through vertical axes of the connection pipes of intermediate sections. Diameter of the third cylindrical part is equal to 0.81-1.10 diameters of cylindrical body part. Technological support to facilitate manufacture of gas inlet and outlet header body or header body sections has frame with at least two support members, namely with support plates arranged from both sides from medium vertical plane of housing body to be produced and spaced apart from longitudinal axis thereof to support contact points in lower body half for radial distance corresponding to outer body radius. Each support member comprises not less than one flat part tangential to corresponding radius and arranged to be supported along cylindrical body section generator or cylindrical body part generator so that above radius is spaced an angular distance equal to 15-75° from vertical line in plane transversal to the generator in both opposite directions beginning from lower point of cross-section of the body or body section preferably shaped as solids of revolution.

EFFECT: increased manufacturability, reduced labor inputs and material consumption for header components assemblage, increased quality, reliability and service life of header characterized with elevated internal pressure due to optimized parameters of header body sections and technological supports, increased assemblage accuracy and improved header body stability during boring operations performing.

18 cl, 5 dwg

FIELD: the invention is designed for application in energy engineering namely it may be used at manufacturing of heat exchanging apparatus particularly for manufacturing of heat exchanging sections of gas air cooling apparatus.

SUBSTANCE: the mode of manufacturing of a heat exchanging section of a gas air cooling apparatus envisages manufacturing and assembling of a frame of a heat exchanging section, a chamber of input and a chamber of output of cooling gas with upper, lower walls, lateral walls forming correspondingly tube and exterior plates with openings, gables and at least one power bulkhead, assembling the walls of the heat exchanging section with wall dispersers-cowls of the flow of the exterior cooling environment predominantly of air, packing the heat exchanging section with a bundle of heat exchanging finned, single passing tubes with their installation in the heat exchanging section in rows along the height with dividing the rows with elements on different distances and fixing the ends of the tubes in the openings of the tube plates. At that the number n on a meter of the width of the transversal section of the bundle of the heat exchanging tubes is taken out of condition where FT - arelative total square of the heat exchanging surface of the bundle of finned tubes falling on 1 m2 of the square of the transversal section of the flow of the heat exchanging environment predominately of air taken in the diapason 72,4<FT < 275,8, a stretched magnitude; D1- a diameter of a heat exchanging tube with finning, m; D2 -a diameter of the same heat exchanging tube without finning, m; Δ -the thickness of the fin of the finning or an average thickness of a fin, m; Β - a pitch of the fin of the tube, m.

EFFECT: allows to decrease labor-intensiveness of manufacturing and assembling of a heat exchanging section of the gas air cooling apparatus at simultaneous increasing of heat exchanging effectiveness and manufacturability due to optimization of the quantity of heat exchanging tubes in a bundle and as a result of mass of elements of the chamber of input and of the chamber of output of gas namely tube and exterior plates, optimal number of openings in which their mass is decreased at simultaneous security of demanded solidity and longevity of separate elements of a heat exchanging section and as a result of the whole gas air cooling apparatus.

5 cl, 7 dwg

FIELD: the invention is designed for application in energy engineering namely in the technology of manufacturing and construction of heat exchanging sections of a gas air cooling apparatus.

SUBSTANCE: the mode of manufacturing of a heat exchanging section of a gas air cooling apparatus includes manufacturing predominantly on a loft of the lateral walls of the frame of the

section with wall displacers-cowls of air environment, assembling on a slip with support poles of the elements of the frame of the section - lateral walls, lower transversal beams and gas input-output chambers forming gables of the frame and also of frame rigidity elements with the following packing of the multi-row bundle with single-passing finned heat exchanging tubes with forming with them and the gas input-output chambers of a vessel working under pressure, installation of upper transversal beams and carrying out hydraulic tests of the assembled section. At that the terminal poles of the slip are executed with locating their leaning sites at different levels with height difference making ( 1,1-4,6)d, where d - an interior diameter of a tube of the bundle and at assembling the frame the gas input-output chambers are installed on the final poles of the slip.

The heat exchanging section of the gas air cooling apparatus is fabricated in accord with above indicated mode. The mode of manufacturing of the heat exchanging section of the gas air cooling apparatus includes manufacturing on the loft of the lateral walls of the frame of the section with wall dispersers-cowls of air environment, and also elements of rigidity of the frame, assembling on the loft with support poles of the elements of the frame - lateral walls , lower transversal beams and forming gables of the walls of the frame of the chambers of input-output of the gas and also of the elements of rigidity of the frame with following packing of the multi-row bundle out of single-passing finned heat exchanging tubes forming with their help and the gas input-output chambers of a vessel working under pressure, installation of upper transversal beams and carrying out of hydraulic tests of the assembled section. At that the low and the upper transversal beams of the frame of the section are installed along the length of the lateral walls with spacing overall of height marks, equal (0,12-),51)d, where d - an interior diameter of the tube of the bundle and cuts of different height predominantly for dimensions of the transversal section of the chambers are made for installation of gas input-output chambers on the final plots of the lateral walls in the upper belt and the overall part of the height of the walls. The heat exchanging section of the gas air cooling apparatus is characterized with the fact that it is manufactured in accord with this mode.

EFFECT: allows to increase manufacturability of fabricating of the heat exchanging sections at simultaneous lowering of metal consuming of construction, simplification of the process of fabricating and lowering labor-intensiveness.

13 cl, 10 dwg .

FIELD: heat and power engineering, possibly manufacture of heat exchange units of apparatuses for recovering exhaust gas heat of aggregates, particularly for heating air by means of exhaust combustion products from compressor of gas turbine plant of gas pumping aggregate in compressor stations of main gas conduits.

SUBSTANCE: method comprises steps of making in manufacturing stations blanks of shells of housings manifolds for supplying and discharging heated air, tubes and tube walls, members of unit carcass; bending tubes for forming four-way bent in horizontal plane tubes having successively changed along length two outer and two inner branches and three elbows joining said branches; in each, mainly in odd row forming two tubes with bent portions having length πR where R - radius of tube; forming bent portions of one tube in its inner elbow and forming bent portions of other tube in two outer elbows; forming other tubes of odd and even rows with bent portions having length πR/2 and joining them by means of rectilinear inserts with successively changed length values. In each row two inner branches of each next tube of row with joining elbow are formed in such a way that they are inscribed from outside into bending formed by respective branches and by joining them elbow of previous tube of said row. Minimum-length tube of each row has development length lmin consisting at least 0.75 of development length lmax of maximum -length tube of row. After making bent tubes, said tubes are pressurized; manifolds for supplying and discharging air are assembled and tube walls are welded-in to them. Unit carcass and manifolds for supplying and discharging air are mounted; tubes are packed and they are again pressurized together with manifolds.

EFFECT: enhanced effectiveness of manufacturing process.

10 cl, 14 dwg

FIELD: power machine engineering, possibly manufacture of heat exchange apparatuses, namely heat exchange units of modular or modular-sectioned heat exchange apparatuses of regenerative air heaters.

SUBSTANCE: method of manufacturing intermediate, upper and lower heat exchange units comprises steps of making in manufacturing stations blanks of shells of housings of manifolds, tubes, tube walls and members of unit carcass; bending tubes for forming multi-way bent in plane tubes; pressurizing bent tubes; assembling manifolds for supplying and discharging air and welding-in tube walls to them; mounting unit carcass and manifolds; packing tube bundle and again pressurizing tubes. Unit carcass and manifolds for supplying and discharging air are mounted in fixture at installing on plate fixture of portal frame with struts and upper beam, additional struts with detachable beams provided with coordinate members with supporting vertical surfaces and additional struts for fixing mounted struts of unit carcass. At manufacturing lower heat exchange unit, two-step plate of fixture is used. At mounting manifolds for supplying and discharging air, their ends are fixed along contours and three-dimensional position of housing of each manifold is fixed by means of coordinate and supporting discs secured from lower side of detachable lower beam of portal frame coaxially to central vertical axes of manifolds.

EFFECT: enhanced effectiveness of manufacturing process.

16 cl, 16 dwg

FIELD: producing fuel assemblies from fuel elements.

SUBSTANCE: fuel elements held in accumulating tank installed under machine-tool incorporatying two-coordinate positioner and linear drive with pusher provided with collet chuck are vertically inserted in parallel into fuel assembly frame. Distance between spacer grids is increased from 250 to 500 mm and more.

EFFECT: reduced material input due to shorter distance between fuel assembly spacer grids.

5 cl, 6 dwg

FIELD: heat and power engineering, possibly manufacture of apparatuses for recovering heat of exhaust gases of aggregates, namely for heating air by means of exhaust combustion products from compressor of gas turbine aggregate.

SUBSTANCE: method comprises steps of placing in stock carcass of heat exchange unit and of shell of manifolds for supplying and discharging heated air to which tube plates are welded-in; mounting between shells panel of member for displacing inter-tube fluid having flat portion arranged in plane of outer surfaces of tube plates; joining displacing member with shells and joining shells with carcass; then putting in heat exchange unit four-way heat exchanging tubes row-by-row from downwards to upwards; passing each tube of each outer branch through openings of spacing grids fixed on carcass of heat exchange unit; placing inner branches of heat exchanging tubes onto comb secured to bottom; separating inner branches of next rows by means of spacing strips and arranging inlet and outlet ends of tubes respectively in tube plates of shells of manifolds for supplying and discharging heated air; then securing ends of heat exchanging tubes in tube plates and fastening end wall of heat exchange unit.

EFFECT: enhanced accuracy of assembling, lowered labor consumption of working operations.

15 cl, 14 dwg

FIELD: power production machine engineering, possibly manufacture of heat exchange apparatuses such as regeneration type air heaters.

SUBSTANCE: complex includes connected according manufacturing process: station for making tube walls, station for making shells of housing of manifolds for supplying and discharging air, station for bending tubes and station for assembling heat exchange units. Station for bending tubes is connected according to manufacturing process with station for assembling units at least through one stationary or moved apparatus for separate (according to size) vertical storage of bent tubes of bundle before their placing in unit. Bending station includes tube bending machine tool and apparatus for feeding to bending zone of said station tubes and mandrel with rod. Station for assembling units includes at least two stocks; one stock is designed for assembling upper and intermediate units, and at least one is designed for assembling lower unit. Each stock is provided with portal framework having detachable portal beam. On lower side of said beam are mounted: coordinate-supporting discs and apparatus for aligning and fixing in target position tube walls in shell of housing of each manifold for supplying and discharging air.

EFFECT: enhanced efficiency of manufacturing complex.

6 cl, 9 dwg

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