RU2252370C1 - Heating convective radiator and method for mounting recorder pipe in aperture of pipe collector thereof - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: device has upper and lower pipe-shaped collectors, made of aluminum profile, connected to row of vertical ribbed aluminum recorder pipes via short pipe elements, hermetically fixed on one side by press mounting in recorder pipes, placed between pipe element end projecting into hollow of collector and its input into collector aperture, while each pipe element is made in form of barrel, having conical and cylindrical portions, on outer surfaces of which at least one ring-shaped recess is made, in place of transfer of cylindrical portion to conic portion a special piece is made, placed between end of recorder pipe and collector, and compacting element is made in form of transfer cone pressed into edge of input aperture of transfer cone collector, mated with flat ring-shaped surface of special piece and cylindrical surface of barrel, projecting end of which is made open by access from the side of conic portion of barrel. Upper and lower collectors in places of barrels connection have longitudinal flat portions, thickness of which is greater than thickness of walls of round section, and ribbing of each aluminum pipe of recorder is made in form of longitudinal radial plates, placed symmetrically relatively to pipe axis, and face and back surfaces of ribbing form with at least two plates adjacent to them closed air channels, connected to atmosphere at level of upper and lower collectors. Method for mounting recorder pipe in aperture of pipe collector of heating convective radiator is realized by intermediate element, having conic surfaces, by outputting end of intermediate element inside the collector and its resilient depression, while intermediate element is made in form of barrel, having conical and cylindrical portions, inner channel of barrel in zone of outlet of its end into collector hollow is made steeply narrowing, plastic depression is performed by pushing working piston through inner channel of branch pipe on the side of its conical portion until piston falls out into collector hollow, and is then removed.

EFFECT: higher durability and manufacturability.

8 cl, 7 dwg

Description

The group of inventions relates to heating equipment, more specifically to heating radiators-convectors for water central heating systems and methods of fastening aluminum register tubes in the openings of a tubular manifold made of aluminum profile. The group of inventions can be used for heating residential, public and industrial buildings and in technological processes of serial production of heating radiators-convectors of the claimed design, made using finned aluminum pipes.

Known sectional heating radiator for water central heating systems, each section of which contains vertical steel pipes of rectangular cross section, connected by welding with pieces of the same pipes, forming after assembly the upper and lower collectors. The steel elements of each section in the manufacture of heat-dissipating elements by casting from aluminum alloys are used as embedded parts and serve to pass the coolant. Next, the sections are collected in a radiator battery. Heat dissipating aluminum elements are made in the form of ribs and spikes [1].

A disadvantage of the known heating radiator is the complexity of the design and manufacturing and assembly technology.

Known sectional heating radiator, which includes a number of vertical finned tubes of aluminum profile, located between the upper and lower manifolds, also made of aluminum profile. The cavities of the collectors and the vertical tubes of the register communicate with each other by means of tight connections, each of which is made in the form of a nipple with a threaded section placed in the threaded hole of the collector. At the base of each hole, a chamfer is made, mating with the edge, which ends the thread on the nipple. Moreover, the chamfer of the collector hole and the chamfer of the inner surface of the register pipe after pressing it onto the nipple form a V-shaped annular gap between them, in which the sealing gasket is located, and seals installed in the grooves are mounted on the part of the nipple pressed into the pipe. The finning of each pipe is made in the form of a two-side ridge with a pipe symmetrically placed in the center [2].

The disadvantage of the described design of a sectional heating radiator for water central heating systems, adopted as a prototype, is the complexity of its manufacture and assembly due to the large number of used assembly units and low adaptability. The use of sealing gaskets and seals in radiator joints under conditions of temperature fluctuations leads to premature aging of gaskets and seals and depressurization of sealed joints. Hydraulic shocks associated with filling and draining the coolant in the heating system during commissioning due to aging of gaskets, seals and depressurization of the joints will quickly damage the radiator, which will ultimately lead to significant labor and material costs for replacing faulty radiators.

These shortcomings do not guarantee the safe and reliable operation of known radiators at operating pressures above 10 atm.

A known method of securing a heat exchange pipe in a tube sheet, including installing the pipe in the hole of the tube sheet with the outlet of the pipe end having a groove outside the bars, placing an annular sealing element from the side of the protruding end of the pipe, distributing the pipe along the length of the tube opening and flanging the protruding pipe end to the formation of a mountainous collar, pressing the sealing element to the tube sheet and ensuring the tightness of the connection [3].

The disadvantage of this method is the impossibility of fixing the pipe in the tubular manifold.

The closest method in terms of the number of essential features and the achieved result is the method of fastening the pipe in the conical hole of the tube plate of the heat exchanger by installing in the annular gap between the pipe and the board an intermediate element having conical surfaces with inverse taper, releasing the end of the intermediate element outside the board with simultaneous compression of the pipe and elastoplastic expansion of the protruding end [4].

This method of fastening cannot ensure the fastening of the heat exchange pipe in the tubular collector of the radiator by external access.

The task to which the group of inventions is directed is to ensure the operational reliability of a radiator-convector under conditions of high pressure coolant. A single technical result achieved by the implementation of the claimed group of inventions is to increase the strength of the radiator-convector, to simplify the manufacturing and assembly technology, to increase manufacturability, to intensify heat transfer.

The design of the radiator-convector and the method of fastening the register pipe in the hole of the tubular manifold, which ensure the achievement of the above single technical result in all cases to which the requested legal protection applies, can be characterized by a combination of the signs of the “Device” and “Method” as objects of the invention, listed below. The specified single technical result in the implementation of the group of inventions for the object device is achieved by the following set of essential features.

The heating radiator-convector contains upper and lower collectors made of aluminum profile, connected to a number of vertical finned aluminum register tubes using short tubular elements, hermetically fixed on one side by means of a press fit in the register pipes, and on the other, in the collector holes by means of a sealing an element located between the end of the tubular element protruding into the cavity of the collector and its entrance into the hole of the collector. In this case, each tubular element is made in the form of a fitting having a conical and cylindrical parts, on the outer surfaces of which there is at least one annular groove, a collar is made at the point of transition of the cylindrical part to the conical located between the end of the register pipe and the collector, and the sealing element is made in the form of a transition cone collector pressed into the edge of the inlet opening, paired with a flat annular surface of the shoulder and a cylindrical surface of the fitting, the protruding end of which flanging means adapted to access the part of the conical part of the fitting.

In addition, in the particular case of the invention, the upper and lower collectors in the place of attachment of the fittings have longitudinal flat sections whose thickness is greater than the wall thickness in a circular section.

In another particular case of the invention, the fins of each register tube are made in the form of longitudinal radial plates located symmetrically with respect to the pipe axis, and the front and back fins planes form at least two adjacent plates with closed air channels communicating with the atmosphere at a level upper and lower collectors.

In the following particular case of the invention, the diameter of the cylindrical part of the fitting is made with tolerances that ensure its landing in the hole of the collector with interference. A chamfer is made on the edge of the inlet, the angle of inclination of which to the axis of the hole is greater than the angle of inclination of the transition cone by 0.5-2 degrees. The conical surfaces of the transition cone and the conical part of the nozzle have inverse taper. The annular grooves on the outer surfaces of the cylindrical and conical parts of the fitting are made with a rectangular section.

Thanks to the action of the set of essential features, a technical result is achieved according to the object of the invention - the device, namely, the strength of the radiator-convector is increased and, as a result, its operational reliability under conditions of increased coolant pressures, the manufacturing and assembly technology is simplified, the processability is increased, and the heat transfer is intensified. The above single technical result in the implementation of the group of inventions for the object-method is achieved by a combination of essential features listed below.

The method of fastening the register pipe in the hole of the tubular collector of the heating radiator-convector is carried out by means of an intermediate element having conical surfaces with inverse taper by releasing the end of the intermediate element into the collector and its elastic-plastic expansion. In this case, the intermediate element is made in the form of a nozzle having a conical and cylindrical part, the internal channel of the nozzle in the outlet zone of its end into the cavity of the collector is sharply tapering, the plastic pressing of the end of the nozzle protruding into the collector is performed by pushing the working punch through the internal channel of the nozzle from the side of its conical part before the punch falls into the cavity of the collector, and the removal of the working punch from the cavity of the collector is done by rash.

In addition, in the particular case of the invention, the working punch is made in the form of a cylindrical roller, and it is pushed by a pushing punch of a smaller diameter.

The described design of the heating radiator-convector allows the use of profiles obtained by cold pressing from aluminum-magnesium alloys, which are much stronger than cast aluminum-silicon alloys used in analogues. In addition, the exclusion from the design of the radiator-convector seals and gaskets also increases its strength.

The fastening of the register tubes in the holes of the collector in accordance with the claimed method allows not only to increase manufacturability and simplify the manufacturing and assembly technology of the radiator-convector, but also to increase its strength due to the monolithic design.

When testing prototypes, convector radiators of the claimed design withstood pressures of up to 90 atm.

Convector radiators are assembled from semi-finished products, all assembly operations can be easily automated, and the number of operations is minimized.

Heat transfer intensification is achieved both by increasing the heat-dissipating surface of the radiation, and due to convective heat transfer, which is provided by closed air channels located on the front and back of the radiator-convector and communicating with the atmosphere at the level of the upper and lower collectors.

The claimed group of inventions meets the requirement of unity of invention, since the group of diverse inventions forms a single inventive concept, moreover, one of the claimed objects of the group - the method of fastening the register pipe in the hole of the tubular collector of the radiator-convector is intended for the manufacture (fastening) of one of the main nodes of the other declared object of the group - heating radiator-convector.

The possibility of carrying out a group of inventions characterized by the above set of features, as well as the possibility of realizing the purpose of a group of inventions can be confirmed by a description of a possible design of a radiator-convector and a method of fastening a register pipe in an opening of its tubular collector, made in accordance with the claimed group of inventions and illustrated by graphic materials, which depict the following:

Figure 1 - General view of the radiator-convector.

Figure 2 is a side view.

Figure 3 - mount pipe register through the fittings in the holes of the upper and lower manifolds.

Figure 4 - the position of the punches, nozzle and manifold to the expansion of the protruding end of the nozzle.

Figure 5 - after flaring.

6 is a cross section of a pipe register.

7 is a view And on an enlarged scale of the input edge of the hole and the transition cone of the nozzle before flaring the end of the nozzle.

The heating radiator-convector contains a series of finned aluminum pipes 1, forming a register 2. The collectors 3, 4, also made of aluminum profile, are connected to the pipes 1 by means of fittings 5.

Each fitting 5 has a conical part 6 and a cylindrical part 7. On the outer surfaces of the parts 6, 7 there is one annular groove 8 of rectangular cross section. In the place of transition of the cylindrical part 7 to the conical part 6, a shoulder 9 of a rectangular section is made. Each fitting 5 with a conical part 6 for press fit is fixed in the pipe 1, and with a cylindrical part 7 in the hole 10 (Fig. 7) of the collectors 3, 4. Moreover, its shoulder 9 is located between the end of the pipe 1 of the register 2 and collectors 3, 4. The diameter of the cylindrical part 7 of the nozzle 5 and the diameter of the hole 10 (Fig. 7) of the collectors 3, 4 are made with tolerances that secure the cylindrical part 7 in the hole 10 for interference fit. The edge 11 of the hole 10 from the input side of the nozzle 5 into the collector 3 or 4 has an input chamfer 12 located at an angle α ₂ to the axis of the hole 10.

At the junction of the cylindrical surface of part 7 of the nozzle 5 with the annular surface 13 of the shoulder 9, a transition cone 14 is made, the slope angle α _{1 of} which is less than the angle of inclination α _{2 of the} chamfer by 0.5-2 degrees.

The end 15 of the nozzle 5 protruding in the cavity of the collectors 3, 4 is made in the form of a torus 16. The sealing element, which ensures the tightness of the connection of the cylindrical part 7 of the nozzle 5 with the collectors 3, 4, serves, firstly, the transition cone 14 pressed into the edge 11, secondly, the connection of the cylindrical part 7 in the hole 10 of the manifolds 3, 4 for interference fit and, thirdly, flared in the form of a torus 16 end 15 of the cylindrical part 7 of the fitting 5.

The upper and lower collectors 3, 4 in the place of attachment of the fittings 5 have longitudinal flat sections 17, the thickness of which is greater than the thickness of the walls 18 in a circular section of the collectors 3, 4.

The fins of each pipe 1 of register 2 are made in the form of radial ribs having the form of plates 18 located symmetrically with respect to the axis of the pipe 1. The front 19 and rear 20 fins planes form closed air channels 23 communicating with the atmosphere on two adjacent plates 21, 22, which communicate with the atmosphere collector level 3, 4.

The method of fastening the pipe 1 of the register 2 in the hole 10 of the manifold 3 or 4 is as follows. The internal channel 24 of the nozzle 5 in the zone of release of its end into the cavity of the collector 3 or 4 is performed sharply tapering (figure 4). Insert the cylindrical part 7 of the nozzle 5 into the hole 10 until the stop of its transition cone 14 into the edge 11. A working punch made in the form of a cylindrical roller 25 is inserted into the inner channel 24 of the nozzle 5. The punch 26 of a smaller diameter pushes the roller 25 while pressing the transition cone 14 into the edge 11 and the expansion of the nozzle 5 protruding into the collector cavity 3 or 4 of the end 15 from the side of its conical part 6 until the roller 25 falls into the collector cavity. Removing the cylindrical roller 25 from the cavity of the collector 3 or 4 produce it by pouring out. After fixing the nozzle 5 in the manifold 3 or 4, the pipe 1 is pressed onto the conical part of the nozzle 5.

Assembly of the heating radiator-convector is carried out in the following sequence. All the fittings 5 are fixed in the collectors 3, 4 as described above. After that, the conical parts 6 of the fittings 5 are inserted into the conical holes of the pipes 1 of the register 2, and mandrels (not shown) with eccentric surfaces are inserted into the cavity of the collectors 3, 4. The mandrels turn their eccentric surfaces all the way into the flared ends 16, after which the conical parts 6 of the fittings 5 of the upper and lower manifolds 3, 4 are pressed into the conical holes of the pipes 1 from both ends simultaneously. The convector radiator is assembled.

During operation of the heating radiator-convector, heat from the coolant entering the collector pipes 1 to register 2 is transferred from the pipe walls 1 to the fins 18, 19, 20, 21, 22 of the fins, which are additional sources of heat. The presence of closed air channels 23 from the front and rear sides of the radiator-convector, which communicate with the atmosphere at the level of the upper and lower collectors 3, 4, are designed to create traction and to organize convective heat flows, which significantly intensifies heat transfer.

Collectors 3, 4 also have ribs 27, 28, which are heat dissipating elements. In addition, they exclude the entry into the space between the plates 18, 19, 20, 21, 22 and the pipe 1 of foreign objects. The above-described examples of the implementation of the radiator-convector and the implementation of the method of fastening the register tube in the hole of the tubular manifold prove the possibility of realizing the purpose of the group of inventions and achieving the above technical result, but it does not exhaust all the possibilities of implementing the group of inventions characterized by the combination of features given in the claims.

Used sources

1. RF patent No. 2180423, IPC F 24 N 3/06, publ. 03/10/2002.

2. RF patent No. 2059933, IPC F 24 D 3/12, 19/00, F 28 F 1/10, publ. 05/10/1996 (prototype device).

3. Copyright certificate 1374030, IPC F 28 F 9/16, publ. 02.15.88, Bulletin No. 6.

4. Copyright certificate 1449829, IPC F 28 F 9/02, publ. 01/07/89, Bulletin No. 1 (prototype method).

Claims (9)

1. A heating convector radiator comprising upper and lower tubular manifolds made of aluminum profile, connected to a series of vertical finned aluminum register tubes by means of short tubular elements hermetically fixed on one side by means of a press fit in the register pipes, and on the other, into the holes of the collector by means of a sealing element located between the end of the tubular element protruding into the cavity of the collector and its entrance into the hole of the collector, characterized in that each the tubular element is made in the form of a fitting having a conical and cylindrical part, on the outer surfaces of which there is at least one annular groove, a collar is made at the point of transition of the cylindrical part to the conical, located between the end of the register pipe and the collector, and the sealing element is made in the form of a transition cone collector pressed into the edge of the inlet opening, mating with a flat annular surface of the collar and a cylindrical surface of the fitting, the protruding end of which is made once Rolled through access from the conical part of the fitting. 2. The radiator-convector according to claim 1, characterized in that the upper and lower collectors in the place of attachment of the fittings have longitudinal flat sections, the thickness of which is greater than the thickness of the walls of circular cross section. 3. The convector radiator according to claim 1, characterized in that the fins of each aluminum register tube are made in the form of longitudinal radial plates located symmetrically with respect to the pipe axis, and the front and back fins are formed with at least two adjacent plates closed air channels communicating with the atmosphere at the level of the upper and lower collectors. 4. The radiator-convector according to claim 1, characterized in that the diameter of the cylindrical part of the fitting is made with tolerances that ensure its landing in the hole of the collector with an interference fit. 5. The radiator-convector according to claim 1, characterized in that an input chamfer is made on the edge of the inlet, the angle of inclination of which to the axis of the opening is 0.5-2 degrees greater than the angle of inclination of the transition cone. 6. The radiator-convector according to claim 1 or 5, characterized in that the conical surfaces of the transition cone and the conical part of the fitting have the inverse taper. 7. The convector radiator according to claim 1, characterized in that the annular grooves have a rectangular cross-section. 8. The method of fastening the register pipe in the hole of the tubular collector of the heating radiator-convector by means of an intermediate element having conical surfaces with inverse taper by releasing the end of the intermediate element into the collector and its elastoplastic compression, characterized in that the intermediate element is made in the form of a fitting having a conical and cylindrical parts, the internal channel of the fitting in the zone of release of its end into the cavity of the collector is sharply tapering, plastic expansion is produced ny pushing punch working channel spout at the inner side of its conical portion to Drop collector punch into the cavity, and the removal of the punch from the cavity of the working collector produce precipitation. 9. The method according to claim 8, characterized in that the working punch is made in the form of a cylindrical roller, and its pushing is carried out by a pushing punch of a smaller diameter.

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