FI93897C - Bandage for a helical tube - Google Patents

Description

93897

Threaded pipe connection

The invention relates to a threaded pipe connection. When connecting the parts of the damper pipes 5 for HVAC purposes, different pipe-shaped and / or separate connection parts are generally used to provide the necessary connections for the pipelines, e.g., which can be dismantled for inspection and cleaning. Such joints work well as such. In current solutions, however, the joints coming to the ends of the pipelines are usually fastened with pop rivets or similar members, in which case the connection requires the pipe installer to e.g. carrying the drill, rivet pliers and cutting saw with you during installation work. Because the installation work is often done at a height of 15 or otherwise awkward places, it becomes very difficult to carry the rivets and all the tools needed for the rivet joints.

The object of the present invention is to provide a simple, quick and easy-to-install connection of a threaded pipe 20 which avoids the above-mentioned disadvantages. To achieve this, the connection according to the invention is characterized in that the connection consists of an extension with a threaded seam on the inner surface. a helical recess receiving a corresponding internal thread receiving the ridge portion 25, which allows the extension to be rotated over the threaded seam tube.

Other preferred embodiments of the invention are characterized by what is set forth in the claims below. The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which Figure 1 shows a side view and open section of an embodiment of a joint according to the invention, Figure 2 shows another side view and open section of a joint according to the invention, Figure 3 shows a side view and open section, a third embodiment of the joint as seen from the side and with an open Lei-5 roof, Fig. 4 shows an application of the joint according to the invention.

FIG.

As can be seen from the figure, the height of the recess 4 inside the extension is preferably lower at the base end A of the extension than at its end B, whereby the ridge portion 3 of the threaded seam tube gradually tightens against the extension recess, locking the parts 1 and 2 together.

In the embodiment according to Fig. 1, the extension 2 is formed at least in part by a double structure consisting of an outer tube 5 and an inner tube 6. The threaded seam tube 1 la 7.

Figure 2 shows another embodiment of the joint according to the invention, in which the threaded seam tube 30 is shown in its screwed-in position with the inner container of the extension connection 8. Inside the extension connection 8 there is an elastic support and abutment surface 9. An elastic abutment 9, e.g. made of rubber, deforms when the threaded seam pipe 1 is threaded inside the extension joint so that the abutment seals the pipe connection. 35 In both of the above embodiments 3,9897, the extension is easily connected to the threaded seam tube by rotating the extension clockwise. No tools or other measures are required except a possible locking screw R to ensure the cohesiveness of the joint.

5 In the case according to Figure 3, it is a lined or thermally insulated pipe. The extension joint 12 is connected to the end of the threaded seam pipe 13 forming the outer pipe of the pipeline 10 by twisting, as previously described. Between the threaded seam pipe 13 and the inner pipe 11 there is, for example, an insulating layer 14 of 10 blown wool. In this way, according to the invention, an insulating joint is quickly and advantageously obtained, the tightness of which can be further improved by O-rings placed at suitable locations.

.... The advantages of the joint according to the invention can be effectively utilized in the situation according to Fig. 4, where the extension joints 20 of the joints 20 according to the invention comprise hinge joints 19 at one end, by means of which the joints 20 and at the same time the threaded pipes 22,18 are connected . Thanks to the connection according to the invention, the extension connections can be easily installed in the pipelines 22,18 without rivet or butt joints. This is an important advantage, for example, for occupational safety, because when installing pipelines, the installer does not have to use or transport large quantities of different tools.

It will be apparent to those skilled in the art that the various embodiments of the invention are not limited to the examples set forth above, but may vary within the scope of the claims below.

Claims (5)

1. An extension nozzle (2; 8; 12; 20) for a spiral joint (1; 11; 22; 18), characterized in that a helical depression (4) with a helical groove (4) is provided on the inner surface of one end of the extension nozzle. inner thread corresponding to the match portion (3) of the coil joint (3) of the coil joint (1; 11; 22; 18) for receiving the same and allowing the extension stud to be screwed onto the coil joint, and a collar (19) at the other end of the extension joint with help the extension stud and thus the spiral joint tube can be connected to other parts of a pipeline. 2. An extension stud according to claim 1, characterized in that the height of the inner thread in the extension stud is smaller at its root (A) than at its end (B). 3. An extension nozzle according to claim 1 or 2, characterized in that the extension nozzle (2) consists of an at least partially double tube structure forming an outer and an inner tube (5,6) such that a spiral joint tube (1) screwed into the extension nozzle (1) the joint is between the outer and inner tubes of the extension plug (5,6). 4. An extension nozzle according to claim 1 or 2, characterized in that in the extension nozzle (8) there is an elastic shoulder (9) for the screwed-in coil joint (1). 5. An extension nozzle according to any of claims 1-4, characterized in that where a pipe line (10) to be provided with an extension nozzle is a lined tube, the extension nozzle consists of an outer tube (13) connected to a tube (13) connected by a spiral joint tube (13). ), at whose outer tube there is a threaded recess corresponding to the match portion of the spiral joint of the outer tube (13) of the tube line, which permits the extension of the extension plug to the tube line (10).