RU157230U1 - PIPE JOINT ASSEMBLY - Google Patents

Abstract

1. The connection unit of the polymer pipe, characterized in that it contains intended for placement inside the pipe supporting sleeve, equipped with a locking collar, restricting the movement of the end portion of the connected pipe, and a crimping sleeve designed to cover the outside of the pipe with the supporting sleeve and containing on the inner surface of the locking groove for interfacing with a retaining collar, wherein the crimp sleeve is made split along the vertical axis of symmetry and consisting of at least two parts representing both segments of the cylinder with radially arranged alternating protrusions and grooves on the inner surface, forming in a closed state a hollow cylinder with alternating annular protrusions and grooves on the inner surface, while the crimp sleeve is provided with circlips covering it from the outside, made it possible to crimp and fix the segments closed sleeves. 2. The connection node according to claim 1, characterized in that the crimp sleeve with retaining rings is configured to uniformly crimp the pipe and fix its position with annular protrusions of the crimp sleeve over the entire interface surface. The connection node according to claim 2, characterized in that the crimp sleeve with retaining rings is configured to uniformly crimp the pipe with a reinforcing system, consisting of reinforcing elements and located inside the pipe walls, and fix the position of the pipe and elements of its reinforcing system with ring projections of the crimp sleeve over the entire mating surface of the pipe and crimp sleeve 4. Connection node according to any

Description

Purpose and scope.

The utility model relates to devices used in industry and housing for transporting liquid and gaseous media and can be used to connect pipes, including those designed for cold and hot water supply, for the oil industry and the chemical industry, machine and shipbuilding, in aviation , space industry and construction of hydraulic structures and collectors.

The utility model is a junction of various types of polymer pipes, pipes, hoses, hoses, profiles, etc. pipe elements (hereinafter referred to as a generic term - pipes) within the claimed utility model, mainly reinforced, between themselves or for connecting polymer pipes to metal pipes or metal fittings.

State of the art

Known pipe joints using plastic sleeves. In such joints, plastic bushings serve only for mechanical fixation of the pipe and the elements of the connection unit relative to each other, and the tightness is ensured by the use of an additional sealing element made of rubber or other elastic material. The disadvantage of such compounds is the presence of an additional sealing element, which, as a result of factors of the transported medium, such as temperature or chemical aggressiveness, can lose its elastic properties or collapse, as a result of which the tightness of the connection will be impaired (Appendix to the journal “Polymer pipes”. Reference “ Polymer pipes 2005 ”, Volume 1, pp. 207-228).

A known assembly based on a press fitting, consisting of a support sleeve and a soft retaining sleeve, the inner surface of which is made with radially spaced shoulders for reliable fixation of the outer surface of the pipe. A significant drawback of such a node is the need to use a special expensive tool for mounting the unit. (http://www.tvelpex.ru/cat_fit6.php; http://1pokanalizacii.ru/montazh/ustanovka-press-fitingov.html)

Known connecting node in the form of a press fitting with a sliding sleeve, consisting of a support sleeve and a locking sliding press sleeve (for example, known from publications on the Internet http://www.premin.ru/advantages.html; http: // 1pokanalizacii .ru / montazh / ustanovka-press-fitingov.html; or publication, for example, a patent for utility model RU 64318, etc.) Significant disadvantages of such a node are the absence of radially located beads on the inner surface of the sleeve and, as a consequence, the low compression efficiency of the outer surfaces of pipes, especially reinforced pipes, which I have low adhesion to reinforcing fiber materials of which the tube is made, and the need for expensive special tool for mounting such connector assemblies.

A known assembly based on a compression fitting, consisting of a support sleeve, a screw-in fixing sleeve (sleeve) and an internal split sleeve (for example, known from the publications of the invention RU 2484353 or http://www.polyplastic.ru/sites/default/files/catalog /catalog_compress_fiting_gf_2009.pdf) In this case, the sleeve, as a rule, has an external conical surface, which is affected by the coupling when it is screwed onto the support sleeve. Due to this effect, it is possible to form a connection of any desired length while ensuring smooth sliding of the coupling on the sleeve, and ultimately, the connection of the polymer pipe with another polymer or metal pipe. In this case, the sleeve has radially spaced flanges on the inner surface for fixing the outer surface of the pipe.

A significant drawback of such a unit is the design complexity and low reliability of the fixation of the pipe, especially reinforced, as well as the limited use of the diameter of the connected pipes.

Also known is a crimp connection node, consisting of a support sleeve and a split, clamp (crimp) by means of a bolt connection, a coupling, which is a clamp (see Figure 1, as well as publications on similar designs disclosed, for example, on the Internet http: //www.tvelpex.ru/cat_obgim.php; http://ostroykevse.ru/Truboprovod/Truba_page_10.html; http://1poteply.ru/sistema/montazh-trub-iz-sshitogo-polietilena.html: or disclosed in patent information sources, e.g. EP 0899495). The coupling has radially arranged collars on the inner surface for fixing the pipe on the outer surface, but due to the design features, it cannot provide uniform compression over the entire surface of the pipe and thereby has a low compression efficiency of reinforced pipes.

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These disadvantages of the known solutions limit the scope of the known solutions of the pipe connection unit and significantly reduce the reliability and durability of their use.

Utility Model Essence

The technical problem solved by the claimed utility model is to overcome the above design flaws and offer a simple and effective design of the pipe connection unit, consisting of reinforced, polymer, multilayer pipes and / or made in the form of a monotube, as well as for connecting polymer pipes, including reinforced, multilayer or monolithic, with metal.

The technical result achieved by the claimed utility model is to ensure uniform compression of the pipes to be joined, as well as a system for reinforcing polymer reinforced pipes, having in their design made of non-metallic or metallic materials, reinforcing threads, fibers, wire, tape, etc. (hereinafter threads) having, or having weak, and also not having adhesion with the materials of which the pipe is made, as well as improving the reliability of fixation (fixing and sealing) of connected pipes without damage to the triad connection of the integrity of their shells, with an increase in the term of their operation.

It should be noted that in the prior art, information about the solutions of the pipe connection unit providing the above technical result is not known, which allows us to conclude that there are no analogues among the identified information sources that could be taken as a set of essential features for the prototype

According to a utility model, the technical result is achieved by using a polymer pipe connection unit, characterized in that it contains a support sleeve provided for placement inside the pipe, provided with a locking collar restricting the movement of the end portion of the pipe to be connected, and a crimp sleeve designed to cover the outside of the pipe with a support sleeve and containing on the inner surface a locking groove for interfacing with a locking collar, wherein the crimp sleeve is made split along the vertical axis of symmetry and consisting of at least two parts, representing cylinder segments with radially arranged alternating protrusions and grooves of 4

the inner surface, forming in a closed state a hollow cylinder with alternating annular protrusions and grooves on the inner surface, while the crimp sleeve is provided with retaining rings covering it from the outside, made it possible to crimp and fix the segments of the sleeve in a closed state. The crimp sleeve with retaining rings is designed to uniformly crimp the pipe and fix its position with annular protrusions of the crimp sleeve over the entire mating surface

In a preferred embodiment of the utility model, the crimp sleeve with retaining rings is configured to uniformly crimp the pipe with a reinforcing system consisting of reinforcing elements and located inside the pipe walls, and fix the position of the pipe and elements of its reinforcing system over the entire mating surface with the ring protrusions of the crimp sleeve pipes and crimp sleeves.

In a preferred embodiment of the utility model, the retaining rings are displaced to the end sides of the crimp sleeve to allow compression of the segments of the sleeve with uniform compression of the pipe to the same depth along the wall thickness with annular protrusions of the crimp sleeve over the entire mating surface.

In one embodiment of the utility model, the radially arranged protrusions (radial protrusions) on the inner surface of the segments of the split sleeve are made in the form of beads. Moreover, the shoulders can be made rectangular or rounded in cross section.

In another embodiment of the utility model, the crimp sleeve is further provided with crimp rings located in the grooves on the inner surface of the sleeve and configured to form in the closed state annular protrusions of the sleeve with annular grooves between them, bounded at the base by the end surface of the protrusions between the grooves. In this case, the compression rings can be made of rectangular or circular cross-section, or in the form of a Belleville spring, as well as in any other design with a closed loop or split, with the possibility of forming a closed loop when crimping and fixing segments of the crimp sleeve in the closed state by the locking rings. Split crimp rings of the above design can also be made flat.

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In a preferred embodiment of the utility model, the locking groove of the crimp sleeve is configured to fix the end portion of the pipe to be connected and the edge elements of the reinforcing system corresponding thereto, tightly mating with the end surface of the shoulder.

In yet another embodiment of the utility model, which is preferred, the support sleeve comprises annular protrusions on the outer surface, with the possibility of uniformly squeezing the pipe to the same depth along the wall thickness over the entire mating surface and additionally fixing the position of the pipe. At the same time, retaining rings covering the split sleeve from the outside are made possible to fix its constituent segments in a closed state and uniformly crimp the tubular element over the entire surface of the interface with the support sleeve and crimp sleeve, with uniformly deepening the annular protrusions of the sleeve and crimp sleeve in adjacent them the material of the tube element to the same depth along the wall thickness, and the groove of the crimp sleeve for interfacing with the retaining collar is made with the possibility of fixation in it th part of the tubular element, tightly mated with the end surface of the shoulder.

In any possible embodiment of the utility model, the elements of the reinforcing system are made of non-metallic or metallic materials, reinforcing threads, and / or fibers, and / or wire, and / or tape having, or having weak, or not having adhesion with adjacent them pipe material. At the same time, in the connection node according to the claimed solution of the utility model, the annular protrusions of the crimp sleeve and / or the support sleeve, as well as the stop collar, fixes the position of the above elements constituting the reinforcing system throughout the interface surface of the elements of the connection node to the pipe, eliminating the possibility of their displacement stretching and / or other deformation, leading to the creation of destructive stresses in the connected section of the pipe, leading to its deformation and / or destruction of the integrity of the shell layers of its components.

A brief description of the drawings.

The utility model is illustrated by drawings, where

FIG. 1 - prior art. Schematic illustration of a crimp connector

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FIG. 2 is a schematic illustration of a connection node according to a utility model;

FIG. 3 is a general view of the connection node.

FIG. 4 - split crimp sleeve: a) with radial shoulders 8; b) with crimp rings 10.

It should be noted that the accompanying drawings illustrate only some of the most preferred embodiments of the utility model and cannot be construed as limitations on the content of the utility model, which, obviously for a person skilled in the art, may include other embodiments.

An example of the feasibility of a utility model.

As follows from FIG. 2 and FIG. 3 drawings, according to the claimed solution of the utility model, the pipe connection unit consists of a support sleeve 1, a split crimp sleeve 2 (crimp sleeve) and retaining rings 3 (Fig. 2).

The crimping sleeve 2, which is fixed on the outer surface of the pipe, is made split along the axis of symmetry and consists of at least two parts, which are cylinder segments 4 resembling half cylinders in section, when the sleeve is divided into two parts, as shown in FIG. 3.

On the inner part of each of the segments 4 of the split crimp sleeve 2, alternating grooves 13 and protrusions 12 are made radially located on the inner surface and form ring projections and grooves in the closed state of the crimp sleeve segments. Moreover, the radially located protrusions on the inner surface of the segments of the crimp sleeve can be made in the form of beads 8 (Fig. 4a) of a given geometry, or in the form of crimp rings 10 (Fig. 4b) located in the grooves 9, the inner contour of which is made in depending on the size used to connect the pipe. Moreover, the collars 8 can be made in the form of a rectangular and / or rounded section and / or in the form of a polygon, and the crimp rings 10 can be round, rectangular or other section made flat, as well as in the form of a disk spring or its coils, or other structures with a closed loop or made split, with the possibility of forming a closed loop during compression and fixing segments of the crimp sleeve in the closed state of the retaining rings. This geometry of the flanges 8 and rings 10 provides them 7

uniform deepening along the wall thickness of the adjacent layer of pipe 5 to the same depth and thereby uniform compression and high-quality fixing of both the pipe as a whole and the elements of its reinforcing system, without violating the integrity of the pipe.

The support sleeve 1 is installed until it stops inside the end portion of the pipe to be connected 5. Then, the parts of the split crimp sleeve 2 are installed on the outer surface of the pipe, so that the lock collar 6 of the support sleeve mates with the lock groove 7 of the compression sleeve. A mounting fixture is installed on the installed parts of the split crimp sleeve and the parts of the crimp split sleeve are pulled in the radial direction to the center of the pipe to be connected using threaded elements. Tightening stops when the tool is fully closed. Then, snap rings 3 are mounted on the outer surface of the closed crimp sleeve, fixing the position of the crimp split sleeve and the support sleeve on the tube element. After installing the snap rings, the fixture is removed. The groove 7 for interfacing with the retaining collar 6 is preferably configured to fix an end portion of the pipe 5 to be connected that is tightly coupled with the end surface of the collar 6. Thus, an additional effect of fixing the pipe in the joint and protecting its ends from destruction is achieved. Of particular importance is the presence of a groove when connecting a reinforced pipe, since the edge elements of the reinforcing system, for example, made of non-metallic or metallic materials, reinforcing threads, and / or fibers, and / or a wire and / or tape having, or having a weak, or not having adhesion to the material of the layer adjacent to it and / or the layers of which the pipe is made, are fixed in the groove, which prevents them from being pulled out of the pipe material layer in which the reinforcing system is located, thereby increasing the reliability of the connection.

The node connecting pipes according to a utility model operates as follows.

The design of the split crimp sleeve allows you to perform radially located flanges on its inner surface or provide it with crimp split rings (ring), which are overlapped and form a uniform closed circle. The tightening of the parts of the sleeve occurs in the radial direction to the center of the connected pipe. At the same time, the collars or crimp rings have a configuration that allows you to evenly penetrate (cut) to a given depth along the thickness of the pipe wall to ensure uniform compression and reliable fixation of the elements 8

reinforcing systems, for example, made in the form of threads or fibers, or in another embodiment known from the prior art, located inside the pipe wall. Moreover, since the inner surface of the annular protrusions of the crimp sleeve formed by collars or crimp rings is always closed and remains in the shape of a circle, and the ring protrusions formed by them are uniformly distributed over the entire contact surface of the crimp sleeve with the pipe, the same degree of impact on the outer surface of the pipe in to any point along its lateral surface, and hence the force of pressing and fixing the elements of the reinforcing system. Thus, at the moment of tightening the sleeve in the radial direction, the annular protrusions are pressed into the outer surface of the pipe to a predetermined depth that is the same at any point on the surface of the pipe and reliably fix the elements of the reinforcing system in the form of threads, fibers, etc. in a stationary position around the entire circumference.

Thus, when the segments of the sleeve are compressed by a specialized device, the pipes are secured by collars or crimp rings and the pipe is uniformly crimped on the support sleeve of the connection unit. Since the outer surface of the support sleeve is preferably also made with radially spaced shoulders of a given shape, the pipe connection unit according to the utility model allows the reinforcing system to be securely fixed inside the pipe wall and the pipe itself, both on its outer and inner surfaces.

Obviously, the possibility of manufacturing split crimp sleeves with different spacing of the annular protrusions allows to increase the efficiency of fixing the elements of the reinforcing system without damaging the integrity of the shells of the connected pipes having reinforcing threads, fibers, wire, tape, etc. made of non-metallic or metallic materials having or having weak, as well as no adhesion with the materials of which the pipe is made, with an increase in the service life of the connected pipe elements. In this case, in the case of using a design with crimp rings, the spacing of the rings can be selected on the spot depending on the design features of the connected pipes, including the degree of adhesion of the material of the elements of the reinforcing system to the adjacent material of the pipe, in the wall of which the reinforcing system is located, which reduces manufacturing costs, improves ease of use, the reliability of fixing pipes in the connection node, as well as the service life of reinforced pipes, due to the absence of its deformation and violation of the integrity number 9

shells in the connection node. The design of the connection node according to the claimed utility model can be applied also for connecting multilayer pipes, the uniformity of compression of which is ensured by the possibility of selecting the pitch and relief of the collars and crimp rings of the crimp sleeve, as well as the geometry of the protrusions of the support sleeve

The design of the connection assembly is not limited to the use of metal pipes with plastic pipes. The developed design may also be applicable for connecting plastic pipes to each other in the form of a through sleeve or in the form of a tee connection.

Claims (16)

1. The connection unit of the polymer pipe, characterized in that it contains intended for placement inside the pipe supporting sleeve, equipped with a locking collar, restricting the movement of the end portion of the connected pipe, and a crimping sleeve designed to cover the outside of the pipe with the supporting sleeve and containing on the inner surface of the locking groove for interfacing with a retaining collar, wherein the crimp sleeve is made split along the vertical axis of symmetry and consisting of at least two parts representing both segments of the cylinder with radially arranged alternating protrusions and grooves on the inner surface, forming in a closed state a hollow cylinder with alternating annular protrusions and grooves on the inner surface, while the crimp sleeve is provided with retaining rings surrounding it from the outside, made it possible to crimp and fix the segments sleeves in closed condition. 2. The connection node according to claim 1, characterized in that the crimp sleeve with retaining rings is configured to uniformly crimp the pipe and fix its position with annular protrusions of the crimp sleeve over the entire interface surface. 3. The connection node according to claim 2, characterized in that the crimp sleeve with retaining rings is configured to uniformly crimp the pipe with a reinforcing system consisting of reinforcing elements and located inside the pipe walls, and fix the position of the pipe and its elements with ring projections of the crimp sleeve reinforcing system over the entire surface of the mating pipe and crimp sleeve 4. The connection node according to any one of claims 1 to 3, characterized in that the retaining rings are displaced to the end sides of the crimp sleeve with the possibility of crimping the segments of the sleeve with uniform compression of the pipe to the same depth along the wall thickness with annular protrusions of the crimp sleeve over the entire surface pairing. 5. The connection node according to any one of claims 1 to 3, characterized in that the radially located protrusions on the inner surface of the segments of the split sleeve are made in the form of beads. 6. The connection node according to claim 5, characterized in that the collars are made rectangular in cross section. 7. The connection node according to claim 5, characterized in that the flanges are made rounded in cross section. 8. The connection node according to any one of paragraphs. 1-3, characterized in that the crimp sleeve is additionally equipped with crimp rings placed in grooves on the inner surface of the sleeve and made possible to form in the closed state annular protrusions of the sleeve with annular grooves between them, bounded at the base of the end surface of the protrusions between the grooves. 9. The connection node according to claim 8, characterized in that the crimp rings are made of rectangular or circular cross-section. 10. The connection node of claim 8, characterized in that the crimp rings are made in the form of a Belleville spring. 11. The connection node according to claim 8, characterized in that the crimp rings are made split with the possibility of forming a closed loop during compression and fixing segments of the crimp sleeve in the closed state of the retaining rings. 12. The connection node according to claim 11, characterized in that the split crimp rings are made flat. 13. The connection node according to any one of claims 1 to 3, characterized in that the retaining groove of the crimp sleeve is configured to fix the end portion of the connected pipe and the edge elements of the reinforcing system corresponding thereto, tightly mating with the end surface of the shoulder. 14. The connection node according to any one of claims 1 to 3, characterized in that the supporting sleeve contains annular protrusions on the outer surface with the possibility of uniform compression of the pipe to the same depth along the wall thickness over the entire mating surface and additional fixation of the position of the pipe. 15. The connection node according to claim 3, characterized in that the elements of the reinforcing system are reinforcing threads made of non-metallic or metallic materials, and / or fibers, and / or wire, and / or tape, with or without weak or no adhesion with adjacent pipe material. 16. The connection node according to clause 15, wherein the pipe is multilayer.

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