RU2581750C1 - Method for producing a concurrent bimetallic radiators - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: method is characterized in that the radiator is used in the manufacture of the tubular core parts with conical sockets into which are inserted connecting conical sleeve, wherein the extreme end section of the radiator mounted conical sleeve. When assembling the radiator is introduced each tapered end into the socket of the tubular portion of the core with an interference fit. Plugs and sockets tubular core portions have their axes of symmetry compressed sections on opposite sides of a plane-parallel and move them toward each other until the interference fit in the design position plugs into the socket portion of the core tube. Moreover, the surface of the conical flare and / or taper sleeve pre-coated with sealant, having in the initial state, the sliding properties improving sleeve in the socket, and in the cured state - adhesion properties and sealing surfaces of the connection.

EFFECT: simplification of manufacturing of the radiator and to increase its reliability.

3 cl, 4 dwg

Description

The invention relates to sectional type room heaters, the sections of which are interconnected by connecting sleeves, in particular, to methods for manufacturing sectional radiators.

Known sectional radiator made of tubular sections, each of which is made of upper and lower pipe sections connected by vertically arranged tubes. The upper and lower pipe sections form the upper and lower channels with threaded nipples at the ends. In the lower pipe segment of the extreme section and in the lower pipe segment of the adjacent section, vertically arranged threaded holes are made. In the cavity of the lowermost lower pipe segment of the extreme section, a partition is installed in front of the threaded sleeve on the outside of the radiator, which separates the cavity of the lowermost pipe segment of the extreme section from the cavity of the adjacent lower pipe segment of the other section. Each threaded hole of the pipe segment is located on the opposite side of the tube, the axis of which is aligned with the axis of the threaded hole of the pipe segment. The inner diameter of the tube dt is less than the diameter d0 of the threaded hole of the pipe section. The diameters Dk of the channels are equal, Dk> do, the partition is docked to the end face of the sleeve and is located between the connector line of the lower pipe segments of the two extreme adjacent sections and the axis of the tube of the outermost section of the radiator. Adjacent extreme pipe segments have thickenings in which threaded holes are made, combined with threaded holes made in the walls of pipe sections. The invention improves the versatility of the radiator (RU 2313044 C1, 12/20/2007).

Known sectional bimetallic radiator, consisting of sections fastened together with a vertical heat-exchange finned column. The column has compensating nodes and horizontal heads. The sections are pulled together and equipped with a mortgage frame made of a material with higher mechanical and / or corrosion properties, made of a vertical pipe and a horizontal component that are tightly fastened together, forming channels for the coolant. Sections contain compensatory nodes of the section in the areas of transition of heads to the vertical part of the column of the section. Compensator assemblies include joints of the vertical pipe and the horizontal component of the frame with a gap, sealed with an aluminum alloy, and a heat-dissipating facing part made by injection molding and thickened at the point where the butt parts of the vertical pipe and the horizontal component of the frame are set. The lateral ribs of the column do not reach the compensating nodes, forming openings for convective heat flows (RU 2351858 C2, 04/10/2009).

A sectional radiator is known (RU 23666U1, 06.27.2002 C1), comprising sequentially arranged sections that are connected to each other by couplings and sealed in the area of their joints, while at the junction of the sections their mating surfaces are made stepwise, and the seal is made in the form of a round in the section of the ring, which is located between the ends of the steps.

A prototype of the technical solution presented in this description is a sectional radiator (RU 2382293 C1, 02/20/2010) containing sequentially arranged sections that are connected to each other by threaded couplings and are sealed in the connection zone with a corresponding seal from the outside, and this coupling installed between the sections has on its two sides are multidirectional screw threads screwed into the tubular parts of the connected sections, which have screw counter threads from the inside. When the couplings rotate in the screw tubular parts of adjacent connected sections, multidirectional screw threads press the sections against each other and ensure the tightness of the connection. It should be noted that each coupling is made in the form of a threaded connecting sleeve with hooks for the mounting key located in it, used in the process of connecting sections of the radiator. This method involves the use of such couplings that have right and left threads at the ends. Such threaded couplings are inserted into the threaded tubular parts of the connected sections and rotate them with a special tool. When the sleeves rotate, they are screwed into the threaded tubular parts of the sections, the sections are pressed against each other by the ends of the tubular parts of the collectors, and the connection of the sections is sealed.

The design of the known radiator according to patent RU 2382293 C1 provides a method of manufacturing a radiator, which is made as follows. First, steel cores are made, for which two tubular parts of each steel core are connected by welding to a column pipe, then the core is molded in the form of liquid metal, the radiator section is molded, it is processed after molding, and the threads in the tubular parts of each section are cut. After that, the sections are connected by connecting sleeves (the threaded couplings indicated above) introduced into the tubular parts of the collectors. Next, screw threaded bushings are screwed into the end sections. After connecting the sections of the radiator, it is painted.

The design of the known radiator is relatively complicated due to the presence of a plurality of threaded couplings (threaded connecting sleeves) in it, which require very precise alignment of the sections to be connected and the use of intersection sealing gaskets in the joints. Due to the possible combination of tolerances on the deviation of the forms, the threaded couplings are screwed into the threaded tubular parts of the sections with a skew leading to chewing of the threads, uneven compression of the gaskets and their partial destruction. Partial destruction of the thread of the threaded connection and uneven compression of the gasket are most dangerous from the point of view of reliability of the radiator, since it is, in fact, hidden. It is also possible not simultaneous thread entry into the connected sections, which leads to a decrease in the strength and tightness of the connection. As a result, the complex design of the radiator predetermines the complexity of the method of its production with high economic costs.

Each threaded connecting sleeve of a known radiator has a complex structure associated with the need to carry out hooks for the mounting key to rotate the sleeve. These hooks are located inside the sleeve, which increases the resistance to movement of the coolant in the radiator. Due to the fact that the connecting and end sleeves have threads at the ends for connecting with the threads of the tubular parts, the end area of each sleeve is selected taking into account this thread and this area, which is relatively important for hydraulic losses, has additional resistance to the movement of the coolant through the connecting sleeve. It should be noted that the radiator can have more than ten sections connected by dozens of threaded bushings.

When assembling radiators during the connection of the sections, they perform a complex operation - place the mounting key in the cavities of the tubular parts of the connected sections, insert the mounting key with hooks, rotate the key in the specified direction, screw the threaded connecting sleeve into the thread of the tubular parts of the sections and screw the sections to the end of the ends of the tubular parts into each other through a sealing gasket, which has a tolerance for the degree of compression.

In case of displacement of the axes of the connected parts of the tubular parts of the sections, the flanges of the threads of the threads of the connecting sleeve and the threads of the tubular parts of the collectors are destroyed, and the sealing sealing gasket is crimped within unacceptable limits.

All this weakens the threaded connection and makes it essentially unsuitable in terms of strength and tightness. It is significant that this partial or complete destruction of the thread is, as indicated above, such a hidden destruction that is not amenable to visual observation, since it is located inside the tubular parts of the collectors. A latent decrease in the strength and tightness of a threaded joint, as a rule, is detected either during the test of the radiator, or during its operation. These shortcomings as a result adversely affect the strength and tightness of the connection of the sections of the radiators. In addition, the known method of manufacturing radiators has a relatively large number of operations, it is complex and less reliable.

Thus, a significant disadvantage of this method is its complexity associated with the need to use threaded connecting sleeves, which do not fully satisfy the requirements for reliable connection of sections.

The technical result presented in this description of the invention - a method of manufacturing a sectional bimetallic radiator - is to simplify the manufacture of the radiator and increase its reliability.

The technical result is obtained by a method of manufacturing a sectional bimetallic radiator, characterized in that first, the radiator sections are made of steel cores, each of which contains tubular parts connected by welding to a column pipe, and then the sections are connected by connecting sleeves introduced into the tubular parts of the cores, and connected with end sections of the radiator, end sleeves, which in the manufacture of cores use tubular parts with conical sockets, as well as connecting conical there are bushings and end conical bushings with threads for connecting the radiator to the pipes of the heating system, and when assembling the radiator, each conical end of the bush is inserted into the socket of the tubular part of the core with interference.

The bushings and sockets of the tubular parts of the cores are placed on their axis of symmetry, compress the sections from opposite sides and move them plane-parallel with respect to each other until they fit in the design position of the bushings in the sockets of the tubular parts of the cores.

Before entering the end of each conical sleeve into the corresponding conical socket, a sealant adhesive is applied to the surface of the conical socket and / or conical sleeve, which in the initial state has the properties of improving the sliding of the sleeve in the socket, and in the cured state, the adhesion and sealing properties of the connection surfaces.

In FIG. 1 shows a sectional bimetallic radiator with conical connecting and end bushings in an assembled state in a longitudinal section.

In FIG. 2 - section of the radiator with tubular parts having conical sockets.

In FIG. 3 - section of the radiator in the pre-installation position with two connecting conical bushings connected to it.

In FIG. 4 - arrangement of sections, conical connecting bushings and end conical bushings in the process of their connection.

A method of manufacturing a sectional bimetallic radiator, made, for example, from the first end section 1 (Fig. 1), one middle section 2 (or a plurality of middle sections) and the second end section 3, as follows. First, steel cores of these sections are made, for which two tubular parts 4 and 5 of each core are welded to the core column pipe 6.

Next, the steel core is placed in the mold for casting, the holes of the tubular parts 4 and 5 are closed with plugs, and the steel core in the form is poured with liquid metal. In the form, the section is cast, the heat exchange fins (fins) are formed, the section is covered with a layer 7 of an aluminum alloy. After curing the alloy, the obtained section is processed, its surfaces are ground.

Then, the middle section is connected to the end section 1 by the conical connecting sleeves 8 (Fig. 4), for which the sleeves 8 are inserted into the sockets of the tubular parts 4 and 5 of the cores of adjacent sections and are pressed into these parts with little effort, as shown in FIG. 3. Similarly, the next middle section is attached to the two connected sections. After which the cycle is repeated as many times as necessary, corresponding to a given number of sections in the radiator. In this example, the assembly of a radiator of three sections to two interconnected sections 1 and 2 connect the third end section 3 described in a similar manner to the connecting bushings 8. After connecting the sections 1, 2, 3 to the end sections 1 and 3 of the radiator, the end bushings are pressed 9. Serial connection of sections characterizes a sequential method of assembly.

A radiator assembly option is provided when the end sleeves 9, sections 1, 2, 3 and the connecting sleeves 8 are arranged sequentially on centering mandrels (not shown), and then the sections are compressed from opposite sides. In this case, the longitudinal axis of the bushings 8 and 9, as well as the axis of the sockets of the tubular parts 4 and 5, are centered by the mandrels and the bushings enter the sockets without distortions due to the plane-parallel movement of the connected radiator parts to be connected. After connecting the sections of the radiator, the mandrel is removed from the holes of the bushings and the tubular parts of the sections. After the operations, the assembled radiator is painted.

An essential feature of the method is that during the manufacturing process each core is formed by a calibrated tool (not shown) inside each end of the tubular part 4 and 5 of the conical socket 10 (Fig. 2). The bell is formed by distributing the end of the tubular part. Moreover, in the manufacturing process of the conical connecting sleeves 8, the ends of each sleeve are made conical, having conical oppositely directed conical surfaces 11 (Fig. 4). The end sleeves 9 are made so that each end sleeve 9 has a conical end with a conical surface 11 and a cylindrical end 12, within which a connecting thread 13 is made. This thread is designed to connect the radiator to the pipe of the room heating system.

When connecting end sleeves 9, conical from one end, to end sections 1 and 3 (Fig. 1), and when connecting sections 1-3 to each other by connecting sleeves 8, these sleeves are tightened in the sockets of the tubular parts 4 and 5 by the indicated pressing-in of the sleeves sufficient and necessary for the full fit of the bushings in the working position, provided that the deformation of the metal of the tubular parts is limited to the extent that metal cracking does not occur.

The taper of the bushings and sockets, in the case of deviations from the plane-parallel movement of the sections and these elements, allows you to move the bushings in the design position with a slight bias compensated by the deformation of the bushings and tubular parts. This feature allows you to reduce the requirements for precision manufacturing of bushings and tubular parts of the cores and the accuracy of the center distance between the tubular parts.

The method provides that, before each conical end of said bushings is inserted into the corresponding conical socket of the tubular part of the core, an epoxy compound or anaerobic adhesive sealant is applied to the surface of the conical socket and / or conical sleeve, having in its initial state the sliding properties of the conical end of the sleeve in the socket, and in the cured state, by adhesion and sealing properties of the joint surfaces.

It should be noted that after curing the adhesive-sealant, it blocks the sleeves in the sockets from movement, which is facilitated by the recesses 14 filled with glue-sealant, made on the conical surfaces of the sleeves 8 and 9 (Fig. 4).

The method described above eliminates the need for complex threaded bushings, the need for their rotation when connecting sections, eliminates the use of deformable sealing gaskets, reduces the requirements for the accuracy of the location of the connected surfaces. All this simplifies the production technology of connecting sleeves and radiators in general, eliminates the use of transitional radiator plugs. Instead of threaded connecting and end plugs, this method uses tapered bushings with surfaces that provide a given level of reliability of connecting sections. In the case of displacements of the axes of the tubular parts of one section relative to the axis of symmetry of the two tubular parts of the other section, the conical connecting and end sleeves in the conical sockets may be skewed. The specified skew is compensated by plastic deformation of the metal of the conical surfaces of the sockets of the tubular parts and the metal moved in the tubular parts of the conical bushings. The method allowed to exclude the complex and time-consuming operation of screwing sections of the radiator in the process of its assembly. The use of steel cores with conical sockets made in the tubular parts of the cores, as well as the use of special conical connecting sleeves and conical end sleeves made it possible to significantly simplify the method of assembling the radiator. It should be noted that the full or partial installation-assembly of the radiator can also be carried out at a construction site using a special simple tool.

Claims (3)

1. A method of manufacturing a sectional bimetallic radiator, characterized in that the first radiator sections are made of steel cores, each of which contains tubular parts connected by welding to a column pipe, and then the sections are connected by connecting sleeves introduced into the tubular parts of the cores, and connected to end sections of the radiator end bushings, characterized in that in the manufacture of cores use tubular parts with conical sockets, as well as connecting conical bushings and threaded conical bushings for connecting the radiator to the pipes of the heating system, and when assembling the radiator, each conical end is inserted into the socket of the tubular part of the core with interference. 2. The method according to p. 1, characterized in that the bushings and sockets of the tubular parts of the cores are placed on their axes of symmetry, compress the sections from opposite sides and move them plane-parallel with respect to each other until they fit in the design position of the bushings in the tubular bells parts of the cores. 3. The method according to p. 1, characterized in that before entering the end of each conical sleeve into the corresponding conical socket, adhesive sealant is applied to the surface of the conical socket and / or conical sleeve, which in the initial state has the properties of improving the sliding of the sleeve in the socket, and in the cured condition - adhesion and sealing properties of the connection surfaces.

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