WO2016058914A1

WO2016058914A1 - Connecting part, method for carrying out a connection, and connection between a connecting part and a pipe part

Info

Publication number: WO2016058914A1
Application number: PCT/EP2015/073348
Authority: WO
Inventors: Stefan Postler
Original assignee: Stefan Postler
Priority date: 2014-10-16
Filing date: 2015-10-09
Publication date: 2016-04-21
Also published as: DE102014115092A1

Abstract

The invention relates initially to a connecting part (1), for example a fitting, for connecting to a pipe part (2), wherein the connecting part (1) has an accommodation region (5) onto which or into which a pipe part (2) can be pushed on or inserted in a movement direction, wherein, in addition, a retraction blocking part (6) is arranged on or in the accommodation region (5) and has an engagement element (7) which extends into a pipe region occupied by the insertable pipe. In order to prevent retraction of the pushed on or inserted pipe part (2), the retraction blocking part (6) is displaceably arranged between a first and a second position in a movement direction of the pipe part (2) and the engagement element (7) extends further into the pipe region in the second position than in the first. The invention further relates to a method for carrying out a connection by pushing on or inserting a pipe part (2) into or on a connecting part (1), for example, a fitting. In addition, the invention relates to a given connection between a connecting part (1), for example a fitting, and a pipe part (2).

Description

Connecting part, method for performing a connection and connection between a connecting part and a pipe part

The invention relates first of all to a connecting part, for example a fitting, for connection to a tubular part, wherein the connecting part has a receiving area onto which or in which a tubular part can be pushed in or pushed in, wherein further on or in the receiving area Retraction-blocking part is arranged, which has an engagement formation which extends in an engageable by the retractable tube portion Rohr¬ to prevent withdrawal of the inserted or inserted pipe part.

Furthermore, the invention relates to a method for performing a connection by pushing or pushing a pipe part in or on a connecting part, for example. A fitting, wherein in the connecting part on a receiving portion of the connecting part, a retraction-blocking part is arranged, which by a meshing action on the pipe can prevent removal of the pipe part.

Furthermore, the invention relates to a given connection between a connection part, for example a fitting, and a pipe part, wherein in the connection part a withdrawal blocking part is arranged in a (second) position in which it prevents the pipe part from being pulled out by an engagement effect ,

Such connecting parts, methods for carrying out the connection and compounds themselves have already become known in various respects. The state of the art is referred to DE 197 02 289 C2 or AT 512 644 Bl, for example.

A connection part known therefrom each has a retraction blocking part, which is firmly fixed in the direction of movement of the tubular part in the connecting part. is orders. The engagement effect is given by claws extendable into the tube region, which are deflected correspondingly radially or outwardly, with respect to a longitudinal axis of the tube part, during insertion of the tube part and bear against the tube part under pretension in the given connection.

The engagement effect of the retraction-blocking part is determined by the deflection once given. The engagement on the pipe, also possibly when moving along the retraction blocking part, can not be influenced.

Proceeding from this, the invention is concerned with the object of specifying a connection part which is advantageous with regard to the engagement effect, a method for carrying out the connection and a connection between a connection part and a pipe part.

According to a first idea of the invention, this object is achieved in the connection part in that the withdrawal blocking part is displaceably arranged in the direction of movement of the tubular part between a first and a second position, and in that the engagement formation extends further into the tube region in the second position as in the first position. The retraction lock member is thus provided with a different engagement effect. In particular, in the first position, a slight or no interference effect with respect to the pipe part may be provided and only in the second position, the desired final engagement effect.

The pipe part can be inserted into the connecting part with little or no interference action. However, the inserted tube part can nevertheless nevertheless be under the desired engagement effect of the retraction blocking part. The connecting part may be formed so that the retraction locking member cooperates with an inner surface of the tubular member. It may also be designed so that the withdrawal-blocking part cooperates with an outer surface of the inserted pipe part. Ultimately, it may also be designed such that the same or several retraction-blocking parts interact with the outer surface as with the inner surface of the inserted tube part.

Accordingly, the connecting part may be formed only as a sleeve. However, it is preferably designed as a sleeve with an inner mandrel on which the tube part is to be pushed open. The sleeve can be formed integrally with mandrel. However, the sleeve can also be designed as a separate part, which, for example, is latched to the mandrel or a part having the mandrel.

With regard to the method, it is made certain that when the pipe part is pushed in or pushed up, the withdrawal blocking part is displaced from a first to a second position. The movement of the withdrawal-blocking part between the first and the second position is preferably carried out together with the movement of the pipe part. In a given connection between the connecting part and the pipe part is based on the fact that the retraction-blocking part is in the second position, but the second position against the insertion direction of the pipe part is a seat for a first possible position of the retraction-locking member upstream, which results in a corresponding arrangement of the pipe part and the retraction-blocking part to a smaller engaging effect. In the case of the given connection, it can thus be seen that, in principle, the retraction blocking part can also, possibly initially, have assumed a different, namely first position. The relevant embodiment of the connecting part is given, although not (more) used in the given connection. The features described hereinbefore and hereinafter with regard to the connecting part, the method of connection and the given compound may each also have significance for the other and the other objects. The explanation in connection with the one article also includes the possible use in the other objects mentioned.

With regard to the pipe part, it may in particular be a pipe part designed as a plastic or metal pipe, in particular a plastic composite pipe with regard to the plastic pipe part.

Further features of the invention are described below, also in the figure description and the drawing, often in their preferred assignment to the features already explained above or illustrated. However, they can also be of importance in an association with only one or more individual features that are described or illustrated in the drawing, or independently or in a different overall concept. Thus, with regard to the connecting part, it is preferred for the retraction blocking part to have a stop surface for displacement through the tubular part. It is a radially inwardly or radially outwardly projecting flange portion on which upon insertion of the pipe part, an end face of the pipe part, or a part of the front surface may come to rest. As a result, the displacement of the retraction blocking part from the first to the second position can be effected automatically by inserting the pipe part into the connecting part.

The retraction blocking part is further preferably at least expandable in the area of the engagement formation. In particular, by such spreading the different engagement effect in the first and second positions can be achieved.

In a further detail, it is preferred that the connecting part, with respect to a longitudinal cross section, has an inclined surface with a bevel extending in the direction of movement of the tubular part, on which the retraction blocking part can be moved. In expandable versions of the withdrawal-blocking part of this can be spread by this. A in the direction of the pipe part, ie in the pipe area, extending projection, for example. In the form of a hook or cons hook-shaping, is thereby advanced further into the pipe area and thus enhances the engagement effect.

By moving the retraction-blocking part or the movement of the retraction-blocking part from the first to the second position, the desired solid support, in the direction of displacement of the pipe part with respect to the retraction-blocking part in the connecting part can also result immediately, for example by frictional engagement. However, it is preferred that the retraction blocking part in the course of the movement from the first to the second position overflows a stop which prevents a return movement of the retraction blocking part after reaching the second position. The stop can also be formed only after reaching the second position, for example, by a spreading in this regard, a portion of the connecting part.

With regard to the said method, it is further preferred that the displacement of the retraction blocking part from the first to the second position is carried out without relative movement between the retraction blocking part and the tubular part. In this way, on the one hand, it is possible to achieve an influence, restricted by the retraction blocking part, locally with respect to the pipe part to the required extent. On the other hand, the required displacement forces can also be kept low. The low or the necessary limited action of the withdrawal-blocking part on the pipe part is achieved in particular when at the beginning of the displacement is still no engaging action of the retraction-blocking part, in particular no engagement of a Hakenausformung the retraction-blocking part in the associated surface of the tube given. Thus, rash-like phenomena on the associated surface of the tube can be avoided by moving the tube part along the withdrawal-blocking part or an engagement formation.

In this regard, it is also preferable that the meshing effect is enhanced in the course of the displacement. This can be achieved in particular by the already described inclined surface on the connecting part.

With regard to the given connection is also preferred in a corresponding embodiment, that the retraction-blocking part against the insertion direction, a stop is assigned, which prevents movement of the retraction-locking member in the first position.

The retraction blocking part, at least in the region of expandable regions, preferably consists of an elastically resilient material. It may initially be a metal material, eg steel. It can also be a plastic material. In this context, moreover, it is preferable that it is a fiber-reinforced plastic. Due to the displacement on the inclined surface and the thus preferably associated spreading of the withdrawal-blocking part in the region of the engagement formation results in the shifted state, a constant acting in the sense of a bias elastic deformation. The bias so presses the engagement formation in the pipe part. It has proven to be particularly advantageous if the bias is so strong that this alone results in a certain incorporation of the engagement formation in the pipe part in the shifted state. With regard to a design of the retraction-blocking part of a fiber-reinforced plastic is so far preferred that the gating at least in relation to installation state in the region of an engagement or radially in the region of an expandable portion of the Rückszugs-blocking part. In this way, a favorable orientation of the fiber components can be achieved, which causes the said elastic bias favorable.

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only exemplary embodiments. Hereby shows:

Fig. 1 is a longitudinal cross-section through a connecting part with a

Retraction lock member in a first position; the article of FIG. 1 at the beginning of insertion of a

Tubular member;

Fig. 3 is a perspective view of the retraction lock member alone; a representation of Figure 1 and Figure 2 at the beginning of the interaction between the pipe part and the withdrawal-blocking part in the course of insertion.

5 shows an illustration according to FIG. 1 or FIG. 2 with the pipe part fully inserted; the enlarged-out portion VI of Fig. 5; FIG. 7 shows a further embodiment in a view according to FIG. 1; FIG.

8 shows the retraction blocking part in the embodiment of FIG. 7 in a perspective illustration; FIG.

Fig. 9, the inserted tube part in a representation accordingly

Fig. 5 in the formation of the withdrawal-blocking part according to the embodiment in Fig. 7; and

FIG. 10 shows the enlarged region X of FIG. 9. FIG.

Shown and described, first with reference to Fig. 1, a connecting part 1, which is designed for connection to a pipe part 2.

The concretely illustrated connecting part has a sleeve 3 and a mandrel 4, on which the pipe part is to postpone.

The connecting part 1, in the illustrated embodiment specifically the mandrel 4, has a receiving area 5, on which a retraction-blocking part 6 is located. In the illustration of Fig. 1, the withdrawal-blocking part 6 is in a first position.

The retraction blocking part 6 has an engagement formation 7, which is designed here as a hook. With this engagement formation 7, the retraction blocking part acts with inserted tube part 2, see for example FIG. 5, together in such a way that the tube part 2 can no longer be pulled out of the connection part 1. The retraction locking member 6 is displaceable between the first position shown in FIG. 1 and the second position shown in FIG. 5 in a longitudinal direction of the pipe part 2 and the connecting part 1, which can be assumed here with the central axis A of these parts. In the second position according to FIG. 5, the engagement formation 7 is further advanced into the tube region R, which here is given in accordance with a wall thickness of the tube part 2, through the wall between an outer and an inner diameter of the tube part 2 , In the second position, it extends correspondingly further into the named tube region than in the first position.

In the drawing, the engagement formation 7 is shown protruding into the tube region R. This can actually arise if the combination of materials of the tube part 2 and the engagement formation 7 or, if appropriate, the withdrawal-blocking part 6 as a whole allows this. This results in at least in addition a form-fitting effect. It can only be a plant of the

Parts together, without or without significant intrusion into each other. This then with appropriate frictional engagement force.

Looking solely at a given connection according to Figure 5, it is clear that the second position of the retraction-blocking part 6, a seat, given here by the inclined surface 17, for a first possible position of the retraction-locking member 6 is upstream. As described, the seat surface for the first possible position of the retraction-blocking part 6 is designed so that it would come with a corresponding arrangement of the tube part 2 and the retraction-locking member 6 to a smaller engagement effect.

In the embodiment of Figures 1 to 5 is further shown that an end face 8 of the tube part 2 in the course of insertion into the connecting part 1 can initially interact with an insertion part 9. The Introductory Part 9, including in detail the non pre-published German Patent application DE 10 2013 109 123 allows the tube part 2, a sealing element 10, 11, which is arranged in the connecting part 1, can overflow during insertion without, for example, by ridges, sharp edges or the like to injure this. In addition, in the illustrated embodiment, a sleeve part 13 is arranged on an insertion edge 12 of the mandrel 4 which faces the tube part prior to insertion, but which can also be formed integrally with the mandrel 4.

As can be seen in particular from FIG. 3, the retraction blocking part 6 is preferred and, in the exemplary embodiment, has a direction of insertion in the direction of insertion

Pipe part 2 seen on the rear flange portion 14, which forms the said stop during insertion. With the flange portion 14 extending in the direction of the tube to be inserted, divided over the circumference, claw portions 15 are connected. The claw sections 15 are each rooted in a common tube section region 16. Concretely and preferably, the flange section 14 is formed starting from the tube section 16.

By means of the claw sections 15, which are separate in the circumferential direction, there is a possibility of expanding the retraction blocking part with respect to the engagement formations 7, which are preferably formed on each of the claw sections.

In the connecting part 1, in the embodiment specifically the mandrel 4, an oblique surface resulting in the illustrated longitudinal cross-section is formed, on which rest in the first position shown in FIG. 1, one or more claw portions.

The inclined surface 17, which can form a cone section as viewed in the circumferential direction, increases in relation to the direction of movement of the tubular part 2 during insertion into the connecting part 1, so that in the area an engagement formation 7 for the correspondingly moving retraction blocking part 6 results in an increasingly larger diameter of the support area. Thus, the engagement recess 7 moves in the embodiment of a respective claw portion 15 radially outward. It moves accordingly in the pipe region R, so that the engagement effect is increasingly reinforced.

The withdrawal-blocking part 7 is preferably formed of an elastically deformable material. It can in principle be a metal part, for example a steel part. Preferably, the embodiment is part as a plastic part.

In the first position according to FIG. 2 or FIG. 4, the retraction blocking part, at least in the region of the claw sections 15, can rest with prestressing on the associated surface of the connecting part, here the mandrel 4. But this bias can also result only in the course of a movement from the first to the second position. Anyway, in the second position shown in FIG. 5 is given in the embodiment with respect to the claw portions 15, a bias in the system to the mandrel 4.

As can further be seen, a circumferential groove 18 is formed in the inclined surface 17, which expires so flat in the direction of displacement of the retraction-blocking part from the first to the second position in the reproduced longitudinal cross-section that in the second position of Retraction-blocking part 6 according to Figure 5, a retraction of a peripheral edge 19 of the withdrawal-blocking part or concretely in the embodiment of a marginal edge 19 of a Krallenab- section 15 results in the groove 18 so that the given against the insertion direction of the pipe part 2 steep flank 20 of the groove 18 acts as a stop for the retraction locking member 6 in the second position shown in FIG.

FIGS. 1 and 2 as well as FIG. 4 also show that in the insertion direction of the tube part 2 on the rear side of the retraction blocking part 6 in the first position a impact means 21 is arranged. The stop means 21 consists in the embodiment of a sealing ring which is inserted into a corresponding groove 22. In the production of the connecting part 1, in which the withdrawal-blocking part, starting from the front free peripheral edge of the withdrawal-blocking part or here specifically the mandrel 4 is pushed or pushed, thus resulting in a tactile resistance when the withdrawal Locking part 6 has reached the first position.

This stop means 21 can then be overrun in the course of the displacement of the withdrawal-blocking part from the first position to the second position, as is apparent from FIG. 5, for example. As a result, an additional seal between the connecting part and the associated surface of the pipe part, by means of the retraction-blocking part, is also achieved in the connection state in the embodiment.

For this purpose, the design of the retraction blocking part according to FIG. 3 can also be adapted in such a way that, in the connection state, the seal or the abutment means 21 is assigned radially to the pipe section 16. With reference to Figures 7 to 10, a further embodiment is shown.

In this embodiment, the withdrawal-blocking part 6 is seen to be U-shaped in cross-section. This results in an engagement effect in the connection state according to FIG. 9 or FIG. 10 with respect to the inserted tube part 2 from radially outside and from radially inside.

Deviating from this, an embodiment may be given, in which the retraction-blocking part 6 is formed only radially outward, according to the mirror image of the embodiment of FIG. 1, as it were. As can be seen, in the embodiment of Figures 7 to 10, said inclined surface is also opposite to the connecting part 1, in this case specifically the sleeve 3 and the mandrel 4 is formed. It results both from the outside as well as from the inside widening or tapering of the inclined surface in the direction of insertion of the pipe part. 2

The above explanations serve to explain the inventions as a whole covered by the application, which in each case independently further develop the prior art, at least by the following combinations of features, namely:

A connecting part, which is characterized in that the withdrawal-blocking part 6 is displaceably arranged in a direction of movement of the tube part 2 between a first and a second position and that the engagement formation 7 extends further into the tube area in the second position in the first.

A connecting part, which is characterized in that the return-blocking part 6 is assigned a stop against the insertion direction, which prevents a movement of the retraction-locking part 6 on the second seat.

A connecting part, which is characterized in that the retraction blocking part 6 has a stop surface for displacement by the tubular part 2. A connecting part, which is characterized in that the retreatment-blocking part 6 in any case in the area of intervention vorf orm is spreadable.

A connecting part, which is characterized in that the connecting part 1 has an inclined surface 17 with a bevel extending in the direction of movement, over which the retraction blocking part 6 is movable. A connecting part, in which the first position of the withdrawal-blocking part 6 is predetermined by an overflowable stop. A connection between a connecting part 1, for example. A fitting and a pipe part, in which the second position against a direction of insertion of the pipe part 2 is preceded by a seat for a first possible position of the retraction-locking member 6, with a corresponding arrangement of the pipe part 2 and Retraction locking member 6 leads to a lower engaging effect.

A method for performing a connection by pushing or pushing a pipe part 2 in or on a connecting part 1 or a fitting, which is characterized in that in the on or pushing the pipe part 2, the withdrawal-blocking part 6 from a first shifted to a second position.

A method characterized in that the displacement is made from the first to the second position without relative movement between the retraction lock member 6 and the pipe member 2.

A method which is characterized in that the engagement opening is reinforced in the course of the displacement.

LIST OF REFERENCE NUMBERS

1 connecting part A central axis

2 pipe part

3 sleeve

4 thorn

5 recording area

6 withdrawal blocking part

7 engagement formation

8 face

9 insertion part

10 sealing element

11 seal

12 insertion edge

13 sleeve part

14 flange

15 claw section

16 pipe section

17 inclined surface

18 groove

19 edge

20 flank

21 stop element, stop means

22 groove

Claims

Fitting, for example. Fitting, for connection to a pipe part (2), wherein the connecting part (1) has a receiving area (5), on or in which in a direction of movement a pipe part (2) is auf¬ or inserted, wherein further on or in the receiving region (5) a retraction-blocking part (6) is arranged, which has an engagement formation (7) which extends into a tube region which engages the retractable tube in order to withdraw the inserted or inserted tube part (2). to prevent, characterized in that the withdrawal-blocking part (6) in a direction of movement of the tube part (2) between a first and a second position is slidably disposed and that the engagement formation (7) in the second position further extends in the tube region than in the first.

Fitting, for example. Fitting, according to claim 1, characterized in that the withdrawal-blocking part (6) against the insertion direction, a stop is associated, which prevents movement of the withdrawal-locking part (6) on the second seat.

Fitting, for example. Fitting according to one of the preceding claims, characterized in that the withdrawal-blocking part (6) has a stop surface for displacement by the pipe part (2). 4. connecting part, for example. Fitting, according to one of the preceding claims, characterized in that the withdrawal-blocking part (6) in any case in the region of the engagement formation (7) is spreadable.

5. Connecting part, for example a fitting, according to one of the preceding claims, characterized in that the connecting part (1) has an oblique surface (17) having a extending in the direction of movement slope over which the withdrawal-blocking part (6) is movable.

Connecting part, for example. Fitting, according to one of the preceding claims, characterized in that the first position of the withdrawal-blocking part (6) is predetermined by an overflowable stop.

Connection between a connecting part (1), for example a fitting and a pipe part, wherein in the connecting part (1) a retraction-locking part (6) is arranged in a (second) position in which it by pulling action, a pulling out of the pipe part ( 2), characterized in that the second position against a direction of insertion of the pipe part (2) is preceded by a seat for a first possible position of the withdrawal-blocking part (6), which with appropriate arrangement of

Pipe part (2) and the retraction-blocking part (6) leads to a lower engagement effect.

A method for performing a connection by pushing or pushing a pipe part (2) in or on a connecting part (1) or a fitting, wherein in the connecting part (1) on a receiving area of the

Connecting part (1) a retraction-blocking part (6) is arranged, which can prevent withdrawal of the pipe part (2) by an engagement with the tube part (2), characterized in that when the pipe part (2) the retraction blocking member (6) is displaced from a first to a second position.

A method for performing a connection by pushing or pushing a pipe part (2) into or onto a connecting part (1) or a fitting according to claim 8, characterized in that the displacement from the first to the second position without a relative movement between the withdrawal-blocking part (6) and the pipe part (2) is made.

A method according to claim 8 or 9, characterized in that the engagement opening is reinforced in the course of the displacement.