FI90590B - Insulation pipe series - Google Patents

Description

1 90590

Insulation pipe set a

The invention relates to an insulating pipe assembly comprising a first insulating pipe piece and a second insulating pipe piece, each comprising an inner pipe, an outer pipe and a space between them for an insulating material. . More specifically, the invention relates to an insulating pipe set according to the preamble of the appended claim 1.

The set of insulation pipes according to the invention is particularly suitable for use in the sound-insulated ducts of air conditioning systems, which are obtained by connecting insulation pipe pieces of different lengths and shapes to each other. It should be noted that the insulation pipe set according to the invention can also be used for applications other than air conditioning systems.

Insulation pipes for air conditioning systems are still often provided today by in situ insulating the pipe in which the flowing medium is to flow with insulating material and installing an outer jacket around the insulating material. The method is laborious and therefore cannot be recommended for sites where the piping has to be pulled in a short time. To facilitate and expedite the installation of the pipes, prefabricated insulation pipes have been developed comprising an inner pipe, an outer pipe and an insulator between them. However, the problem with such insulation pipes is the formation of splices during installation. The connections between the insulation pipe sections must be tight and the connection point must be well insulated from the environment. With known insulating pipe pieces, the formation of such extensions is laborious. In practice, the extensions are formed by installing an extension between the pipe pieces to be connected to each other. The extension is inserted - inside the inner tubes and fastened to them by riveting.

In order to perform riveting, the insulator and the outer tube 909090 must be removed around the inner pipes at the joint 35. After riveting, the joint must be insulated and a sheath must be placed around the insulation. The installation of the extension is further complicated by the fact that the inner tube is not always coaxial with the surrounding outer tube, 5 due to the fact that during transport of the insulating tube vibrations and other mechanical loads unilaterally compress the insulating material between the outer and inner tubes. the inner tube is moved away from its original position.

10 Repair and renovation work on pipelines made with known insulation pipes is also problematic. This is because replacing a damaged piping section requires opening extensions, which is very laborious.

The object of the present invention is to eliminate the above-mentioned problems. To achieve this, the insulating pipe set according to the invention is characterized by what is set forth in the characterizing part of the appended claim 1. When there are several such insulating pipe pieces of different lengths and shapes, the construction of the desired piping is 20 quick and easy. A preferred embodiment of an insulating pipe set according to the invention is set out in the appended claim 2.

The main advantages of the series of insulation pipes according to the invention are that it enables easy and quick installation of air-conditioning systems and the like, leaving the work on site to a minimum. Ductwork of different lengths and shapes can be obtained by combining different lengths and shapes of insulating pipe pieces. The insulating pipe pieces according to the invention have in practice several standard dimensions with which the desired total lengths can be obtained. Repair and renovation work of pipelines is also easy when they are provided with the series of insulation pipes according to the invention.

The invention will now be described in detail by way of application examples and with reference to the accompanying drawing, in which 3 90590 in Figures 1 and 2 show two insulating tube pieces belonging to a series of insulating tubes, in Fig. 3 the insulating tube pieces in Figures 1 and 2 are connected to each other,. Figures 4 and 5 show the arrangement of Figure 3 as seen from the end left and right;

Figures 1 and 2 show interconnected insulating pipe pieces, of which the one shown in Figure 1 is called first and is indicated by reference numeral 1 and that shown in Figure 2 by second and is indicated by reference numeral 2.

The insulating tube piece 1 of Fig. 1 comprises a steel inner tube 3, a steel outer tube 4 and a space between them 20 filled with insulating material 5. A steel tubular female body 6 fitted inside the inner tube 3 is arranged at the right, i.e. first end, of the insulating tube body 1. The right edge of the female body 6 is located substantially in the same plane as the right edge of the body 1 of the insulating tube 25 and thus does not protrude from the end of the tube body 1. An annular protrusion 7 is arranged on the circumference of the female body 6, the diameter of which exceeds the inner diameter d of the inner tube 3. The protrusion 7 prevents the female body 6 from moving from the position indicated in the figure to the left-30 model, which is prevented by the right end edge 3 'of the inner tube 3. Arranged around the female body 6 is an annular end flange 8 in the plane of the end of the tubular body 1, which has an inner diameter and substantially corresponds to the outer diameter of the female body. The outer circumference of the end flange 8 is adapted to go inside the flange 9 arranged on the circumference of the outer tube 4, in the groove 10 therein. 90590. The flange 9 is provided by bending the outer tube 4. Thanks to the end flange 8, the female body 6 The inner circumference of the end flange 8 prevents the female body 6 5 from moving further to the right so that it comes out of the inner tube 3, for example.

The insulating tube piece 2 of Fig. 2 is quite similar in structure to the insulating tube piece 1 of Fig. 1. Thus, it comprises at its other or right end a female body 11 according to Fig. 1 10.

At the left or first end of the insulating pipe piece 2 there is a steel male piece 12 which is fitted inside the inner pipe 13. The male body 12 protrudes from the end of the tubular body 2 and an annular protrusion 14 is arranged on its circumference, the diameter of which exceeds the inner diameter d of the inner tube 13. The protrusion 14 prevents the dog piece 12 from moving from the position indicated in the figure to the right, since the protrusion is attached to the left end edge 13 'of the inner tube 13. Arranged around the male body 12 is an annular end flange 15 in the plane of the end of the tubular body 2, the inner diameter of which substantially corresponds to the outer diameter of the male body. The outer circumference of the end flange 15 is adapted to enter the circumference of the flange 17 arranged in the circumference of the outer tube 16. The flange 17 is provided by bending the outer tube 16. The end flange 15 keeps the male body 12 in place so as to be coaxial with the outer tube 16. The inner circumference of the end flange 15 prevents the male body 12 from moving further to the left so that it comes out of the inner tube 30, for example 13. The dimension of the male body 12 is such that it can be pushed into the female body 6 so that the end faces of the insulating tube bodies 1 and 2 are substantially opposite.

The insulating tube piece of Fig. 1 comprises, at its left end, i.e. at one end, a male piece 19 according to Fig. 2.

5,90590

In Fig. 3, the pipe pieces 1 and 2 of Figs. 1 and 2 are connected to each other. In the figure, reference numeral 20 denotes a tightening strap mounted on the flanges 9 and 17. The clamping bracket 20 keeps the pipe pieces 1 and 2 connected. 5 here. The flanges 9, 17 act as an attachment point for the clamping collar. Due to the fact that the tightening strap 20 can be tightened by hand, no tools are required to make the pipe connections. The type of tensioning strap 20 is known to a person skilled in the art, so its structure will not be discussed in more detail in this connection.

In Figures 4, the arrangement of Figure 3 is seen from the left and right ends, respectively. It can be seen from the figures that a hole 22 is made in the end flange 21. The end flange 8 has a corresponding hole even though it is not shown in the figures. The hole 15 22 is for supplying the insulating material (5) between the outer and inner pipes. Feeding the insulating material through the hole is quick and easy compared to how the insulating material is usually provided between the outer and inner pipe. In addition, due to the fact that the hole 22 is formed in the end flange 20, the outer tube of the pipe body remains intact. Reference numeral 23 denotes the tightening handle of the clamping collar 20.

Figure 6 illustrates that the pipe sections of the insulation pipe set according to the invention do not have to be straight. The curved tube piece 24 of the figure comprises the same: male and female pieces as the tube pieces of Figures 1 and 2. The pipe piece 24 can be connected directly to the pipe piece 25, see figure, or to another curved pipe piece.

Fig. 7 shows an embodiment of an insulating pipe set according to the invention, in which the end flanges 28, 29 of the pipe pieces 26, 27 are integral with the female and male pieces 28 'and 29'. The interlocking portions of the male and female bodies 28 'and 29' correspond approximately in diameter to the diameter of the inner tube 30, 31 35. The outer circumferences of the annular end flanges 28, 29 are attached to flanges 34, 35 provided in the outer tube 32, 33 with grooves 36, 37 for receiving the outer circumference of the end flanges. The end flanges 28, 29 center the male and female pieces 28 'and 29' so that they are coaxial with the outer tubes 32, 33. For the sake of simplicity, a tensioning collar around the flanges 34, 35 is not shown in Fig. 7.

The invention has been illustrated by the above examples and it is therefore pointed out that the invention can be implemented in detail in many ways within the scope of the appended claims. Thus, it is conceivable that a set of insulating tubes comprises insulating tube pieces having a male body at each end and insulating tube pieces having a female body at each end: by connecting such tube pieces alternately in succession, the desired piping can be obtained. Although Figures 1 and 2 show that the female body (6, 11) does not protrude from the end of the tubular body (1, 2), and the male body (19, 12) does so, it is possible to provide said bodies 20 so that the female body protrudes from the tubular body. out but not the dog body. It should be noted that an arrangement in which both pieces protrude is not recommended, because then the formation of a splice requires a relatively large amount of space in the axial direction, which space is not always available. It is clear that the pipe sections and the male and female sections and end flanges in them can be made of plastic instead of steel, if the application allows.

Claims (2)

7 9 Π 5 9 O An insulating tube set comprising a first insulating tube body (1; 26) and a second insulating tube body (2; 27), each comprising an inner tube (3 and 13, 30 and 31, respectively), an outer tube (4 and 16, respectively). ; 32 and 33, respectively) and the space between them for the insulating material (5), the first end of the first insulating tube piece (1; 26) having a female part (6; 28 ') and the first end of the second insulating tube piece (2; 27) having the rasp portion (12; 29 ') and said male portion are insertable within said female portion such that the end faces of the insulating tube pieces (1, 2; 26, 27) are substantially opposed, thereby further providing the male and female portions (12 and 15 and 6; 29, respectively); 'and v. 28') surrounds the annular end flanges (15 and v. 8; 29 and v. 28) in the plane of the ends of the insulating tube pieces (2 and v. 1; 27 and v. 26, respectively), the inner diameters of which substantially correspond to the male and female portions. outer diameters and joide The outer circumferences of the n are attached to the outer tube of the insulating tube piece (16 and resp. 4; 33 et seq. 32), which end flanges center the male and female parts so that they are coaxial with the outer tube, characterized in that the end flanges (8, 15, 21; 28, 29) are attached at their outer circumference to the outer tubes (4, 25 16; 32, 33 ) to circumferential annular flange-forming flanges (9, 17; 34, 35) having grooves (10, 18; 36, 37) for receiving the outer circumference of the end flanges and acting to hold the end flanges of the opposed insulating tube pieces and thus also the insulating tube pieces 30 together. - - with collar (20). Insulating pipe set according to Claim 1, characterized in that the flanges (9, 17; 34, 35) are integral with the outer pipes (4, 16; 32, 33) and are formed by bending the outer pipe. 8 90590