Connection device for connecting a fluid line to a hose

Abstract

The aim of the invention is to simplify the design of a connection device (1) for connecting a fluid line (2) to a hose (3) and to reduce the assembly effort during the production of a fluid-tight connection between the fluid line (2) and a hose (3). This is achieved in that: a connection element (4) is made from a polymer material; the connection device (1) has an inner connecting piece (8) the outer diameter of which corresponds to the inner diameter of an overlapping section (5) of the connection element (4), which inner connecting piece is introduced into the connection element (4) in the region of the overlapping section (5) and the material of which has a significantly higher compressive strength than the polymer material of the connection element (4); the overlapping section (5) has, on its outer lateral face, two receiving regions (9, 10) for clamping parts (11, 12) of a clamping connection (7), which are separated from one another by a central section (13) with a larger outer diameter; and the clamping force of the clamping connection (7) can be set such that the connection device (1) can be configured without a seal.

Description

[0001] Connection device for connecting a fluid line to a hose

[0002] The invention relates to a connection device for connecting a fluid line to a hose, comprising a connection element which can be connected to the fluid line on one side and has an overlap section on its other side onto which a hose end to be connected to the connection element can be slid, and a clamping connection by means of which the hose end slid onto the overlap section of the connection element can be clamped on the overlap section.

[0003] These types of connection devices are widely used in conjunction with fluid lines, whether in industrial plants, private households, various infrastructures, the agricultural sector, or other applications. A wide variety of designs are available for these connection devices. To create fluid-tight connections, these devices are equipped with suitable seals.

[0004] Based on the prior art described above, the invention aims to further develop the generic connection device in such a way that its design is simplified and that, when using it, the assembly effort for producing a fluid-tight connection between a hose on the one hand and a fluid line on the other can be significantly reduced.

[0005] This problem is solved according to the invention by the fact that the connecting element is made of a polymer material, that the connecting device has an inner stub whose outer diameter corresponds to the inner diameter of the overlap section of the connecting element, which is inserted into the connecting element in the area of ​​the overlap section and whose material has a significantly higher compressive strength than the polymer material of the connecting element, that the overlap section has two receiving areas for clamping elements of the clamping connection on its outer surface, which are separated from each other by a central section with a larger outer diameter, and that the clamping force of the clamping connection is adjustable so that the connecting device can be designed without a seal.The design of the connecting element of the connection device according to the invention, made from a suitable polymer material, enables a weight-reduced design of the connection device as a whole. The required mechanical strength of the connection device is nevertheless ensured by the inner socket provided according to the invention, which, due to its material design, allows the necessary absorption of clamping forces to the desired extent. When creating the clamping connection between the clamping joint, the hose end, the overlapping section of the connecting element made of the polymer material, and the inner socket, a structure so strong can be created from these components that a fluid-tight connection between the fluid line and the hose can be established without any separate or special seals or sealing elements.

[0006] Polyethylene has proven to be a particularly suitable material for the connecting element. From this material, the connecting element can be manufactured without excessive technical or economic effort, according to the requirements profile, with all desired dimensions in radial and axial directions, wall thicknesses, etc.

[0007] If the inner stub is made of a metallic material, preferably stainless steel, the required mechanical strength of the connection device can be ensured in any case, regardless of which polymer material is used for the connection element of the connection device.

[0008] The clamping elements of the clamping connection are preferably made of a metallic material to ensure that the clamping forces required to produce the seal-free fluid-tight connection can be applied.

[0009] If the two receiving areas of the overlap section of the connecting element have a constant outer diameter, this can be selected so that it is optimally adapted to the inner diameter of the hose end to be connected over the entire axial extent of both receiving areas.

[0010] Advantageously, the central section of the overlapping section of the connecting element has an outer diameter that increases steadily from its two edges to its center, in order to ensure that the hose end is fixed in every case, even in the axial direction of the connecting element.

[0011] If the receiving areas of the overlap section of the connecting element are limited in the axial direction of the connecting element by radial steps on the outer surface of the overlap section, the correct arrangement of the hose end on the overlap section can be ensured even better, whereby it must of course be ensured that no impermissible damage to the hose end may occur.

[0012] According to an advantageous embodiment of the connection device according to the invention, a stop element is arranged on the inner surface of the connection element at a predefinable axial distance to the proximal end of the overlap section, by means of which the insertion length of the inner spigot into the connection element can be limited. This ensures a reliably correct seating of the inner spigot in the connection element.

[0013] If the inner stub projects into the connecting element with its proximal end by a predetermined length beyond the overlap section, the mechanical strength of the connection device according to the invention can be ensured even more reliably.

[0014] To avoid unnecessary edges, protrusions, etc. of the connection device, it is advantageous if the inner stub is aligned with the front surface of the connection element at its distal end.

[0015] Advantageously, the connection element of the connection device is designed as a pipe section at its end section facing the fluid line, the diameter of which is matched to the diameter of the fluid line designed as a pipeline.

[0016] The pipe section of the connecting element is expediently connectable in one piece to the free end of the fluid line designed as a pipeline, preferably by welding.

[0017] In order to make the possible applications of the connection device according to the invention as broad as possible, it is advantageous if the inner and / or outer diameter of both the overlap section and the pipe section of the connection element can be specified as desired.

[0018] If the connection device is to be used to connect two fluid lines designed as hose lines, its connection element can have an overlap section on both sides.

[0019] Naturally, the inner and / or outer diameter(s) of both overlapping sections of the connecting element can be specified as desired.

[0020] According to an advantageous embodiment of the connection device according to the invention, the inner diameter of the end section of the connection element facing the fluid line, which is designed as a pipe section, can be adapted to the inner diameter of the fluid line. This is made possible by the fact that the connection element is made of polyethylene.

[0021] If the clamping elements of the clamping connection are movable towards and away from each other in the axial direction of the overlap section or the connecting element, preferably by means of a screw connection arranged in this axial direction, the strength of the structure between the connecting element on the one hand and the hose end on the other hand can be increased and the sealing effect enhanced by reducing the distance between the clamping elements in conjunction with the diameter design of the central section of the overlap section.

[0022] Provided that the connection device according to the invention has a composite flange member which sits on the outer surface of the hose end pushed onto the overlap section of the connection element, with its end face facing the connection element resting against the clamping part of the clamping connection furthest from the pipe section and has an outer shell section extending in the axial direction of the connection element, wherein the pipe section has an outer shell section extending in the axial direction of the connection element, the outer diameter of which corresponds to that of the outer shell section on the composite flange member side, and furthermore a protective tube sleeve is provided which surrounds the connection element and the clamping device and sits tightly with its inner surface on the outer shell section on the composite flange member side and the outer shell section on the pipe section side,The clamping device and the elements of the connection device that interact with it are effectively protected against external influences and against the ingress of moisture, etc.

[0023] For this purpose, it is advantageous to weld the outer shell section on the composite flange side and the outer shell section on the pipe section side to the inner shell surface of the protective pipe sleeve.

[0024] Alternatively, it is possible to provide two ring flanges, one of which is assigned to each end face of the protective tube sleeve and which can preferably be connected to each other by means of a screw connection in such a way that the protective tube sleeve can be fixed in the axial direction of the connecting element by means of them.

[0025] The invention will now be explained in more detail with reference to one embodiment and the drawing. The drawing shows:

[0026] Figure 1 shows a cross-sectional view of an embodiment of a connection device according to the invention for connecting a fluid line to a hose;

[0027] Figure 2 shows a perspective view of an embodiment of a connection element of the connection device shown in Figure 1;

[0028] Figure 3 shows a perspective view of the connection element shown in Figure 2 with an inserted inner stub;

[0029] Figure 4 is a perspective view of the connection device shown in Figure 1; and

[0030] Figure 5 shows a schematic representation of a further embodiment of the connection device according to the invention.

[0031] An embodiment of a connection device 1 according to the invention, which is explained in more detail below with reference to Figures 1 to 4, serves to connect a fluid line 2 on the one hand and a hose 3 on the other. The diameter of the fluid line 2 can be virtually arbitrary. The internal diameter of the fluid lines can be, for example, 20 cm, but also considerably larger.

[0032] The connection device 1 includes a connection element 4, a clamping connection 7 and an inner nozzle 8. The embodiment of the connection device 1 according to the invention shown in Figure 1 serves to connect the fluid line 2, which is designed as a pipeline and is indicated by dashed lines in Figure 1, to the hose 3, which is also indicated by dashed lines in Figure 1, in a fluid-tight manner.

[0033] As can be seen in particular from a comparison of Figures 1 and 2, the connecting element 4 of the connecting device 1 has an overlap section 5, which is shown on the left in Figures 1 and 2 and faces the hose 3, and an end section designed as a pipe section 14, which is shown on the right in Figures 1 and 2 and faces the fluid line 2 designed as a pipeline.

[0034] The connecting element 4 of the connecting device 1 is made of a suitable polymer material, with polyethylene proving to be particularly suitable. Accordingly, the connecting element 4 of the connecting device 1 can be manufactured with comparatively little technical, design, and process engineering effort in virtually any dimension. This also applies in particular to the pipe section 14, which can be provided with the corresponding diameter depending on the diameter of the pipe or fluid line 2 to be connected by means of the connecting device 1. This applies to all common and standard pipe diameters. Even for special diameters, the pipe section 14 of the connecting element 4 can be provided with the desired dimensions with a slightly increased effort.To create the connection between the fluid line 2 and the pipe section 14 of the connection element 4, the pipe section 14 is integrally connected to the fluid line 2, which is designed as a pipeline, at its free end face, whereby this integral connection can in particular be realized as a welded connection.

[0035] The overlap section 5 of the connecting element 4, which faces the hose 3, has two receiving areas 9, 10 on its outer surface and a central section 13 arranged between the two receiving areas 9, 10. The receiving area 9 extends from the free end of the overlap section 5 to the central section 13, and the receiving area 10 extends from the edge of the central section 13 facing away from the receiving area 9 to the proximal end of the pipe section 14. In the illustrated embodiment of the connecting element 4, the two receiving areas 9, 10 of the overlap section 5 each have the same constant outer diameter. This outer diameter is selected depending on the diameter or inner diameter of the hose 3 to be connected by means of the connecting device 1.The central section 13 of the overlap section 5 has an outer diameter that increases steadily from the receiving area 9 to the middle of the central section 13 and decreases steadily from the middle of the central section 13 to the receiving area 10.

[0036] In the illustrated embodiment of the connection device 1, the inner stub 8 is made of stainless steel. This stainless steel has a significantly higher compressive strength than the polyethylene material of the connection element 4. The outer diameter of the inner stub 8 is matched to the inner diameter of the overlap section 5 of the connection element 4 and extends within the connection element 4 at least over its overlap section 5, but typically projects beyond the proximal end of the overlap section 5 into the connection element 4. The inner stub 8 significantly increases the compressive strength, particularly of the overlap section 5 of the connection element 4.As can be seen in particular from a combination of Figures 1 and 3, the end face of the inner nozzle 8 facing away from the pipe section 14 of the connecting element 4 is arranged flush with the free end face of the overlapping section 5 of the connecting element 4.

[0037] As can be seen particularly from a comparison of Figures 1 and 4, the clamping device 7 of the connection device 1 has two clamping parts 11, 12, one of which is assigned to the receiving area 9 and the other clamping part 12 to the receiving area 10 of the overlap section 5 of the connection element 4. In the embodiment of the connection device 1 described here, the two clamping parts 11, 12 of the clamping connection 7 are made of a metallic material.

[0038] To connect the fluid line 2 to the hose 3, the pipe section 14 of the connection element 4 of the connection device 1 is connected to the fluid line 2 in the manner described above. At the other end of the connection element 4, a hose end 6 of the hose 3 to be connected to the fluid line 2 is pushed or pulled onto the overlap section 5 of the connection element 4. After the pulling or pushing process, the hose end 6 rests on the outer surface of the overlap section 5 of the connection element 4. Then, the clamping element 11 of the clamping device 7 is moved into the receiving area 9 of the overlap section 5. Similarly, the clamping element 12 of the clamping device 7 is moved into the receiving area 10 of the overlap section 5.The clamping elements 11 and 12 of the clamping device 7 are then tightened so that the hose end 6 of hose 3 is firmly fixed to the overlap section 5 of the connection element 4. The connection between hose 3 and fluid line 2 is thus established.

[0039] Due to the material design of the polyethylene connection element 4 and the stainless steel inner nozzle 8, which can be coordinated with the hose 3, and the also predefinable wall thickness of the inner nozzle 8, the clamping effect of the arrangement consisting of the clamping parts 11, 12 of the clamping connection 7, the hose end 6 of the hose 3, the overlap section 5 of the connection element 4 and the inner nozzle 8 of the connection device 1 can be adjusted so that a fluid-tight connection is created between the fluid line 2 and the hose 3, without the need to insert or install any separate sealing elements or the like in this arrangement.Accordingly, in the case of the connection device 1 described above, the number of individual parts can be significantly reduced, and the assembly effort for creating the fluid-tight connection between the hose 3 on the one hand and the fluid line 2 on the other hand can be noticeably reduced.

[0040] If the fluid line 2 is designed not as a pipe but as a hose line, the connection element 4 of the connection device 1 can of course have a further overlap section 5 instead of the pipe section 14.

[0041] In an embodiment of the connection device 1 according to the invention, as shown in Figure 5 and described below, the inner diameter of the end section of the connection element 4 facing the fluid line, formed by the pipe section 14, can be adapted to the inner diameter of the fluid line, since the pipe section 14, like the rest of the connection element 4, is made of polyethylene. This can be achieved, for example, by widening the inner diameter at the end section of the connection element 4, whereby radial steps must be avoided, and, as shown in Figure 5, the diameter adjustment must be made continuously.

[0042] The clamping elements 11, 12 of the clamping connection 7 are axially displaceable towards and away from each other by means of a screw connection arranged in this axial direction, which is not shown in Figure 5. Due to the interaction between the clamping elements 11, 12 of the clamping device 7 and the central section 13 of the overlapping section 5 of the connecting element 4, the connection between the hose end 6 and the connecting element 4 can be strengthened and the sealing effect of the clamping device 7 increased.

[0043] The connecting device 1 has a composite flange member 15, which is located on the outer surface of the hose end 6 of the hose 3 that is pushed onto the overlap section 5 of the connecting element 4. With its end face 16 facing the connecting element 4, the composite flange member 15 can abut against the clamping part 11 of the clamping connection 7 located furthest from the pipe section. In the illustration in Figure 5, the composite flange member 15 is shown at an axial distance from the clamping part 11 of the clamping connection 7 located furthest from the pipe section. On its outer surface, the composite flange member 15 has an outer shell section 17 extending in the axial direction of the connecting element 4, wherein the pipe section 14 of the connecting element 4 has an outer shell section 18 extending in the axial direction of the connecting element 4, the outer diameter of which corresponds to that of the outer shell section 17 on the composite flange side.The connection device 1 includes a protective sleeve 19, which surrounds the connection element 4 and the clamping device 7 and whose inner surface fits tightly against the outer shell section 17 on the composite flange side and the outer shell section 18 on the pipe section side. The outer shell section 17 on the composite flange side and the outer shell section 18 on the pipe section side can be welded to the inner surface of the protective sleeve 19 to ensure fixation and sealing. Alternatively, a threaded connection can be made between the inner surface of the protective sleeve 19 and the outer shell sections 17 and 18.

Claims

Patent claims 1. Connection device for connecting a fluid line (2) to a hose (3), comprising a connection element (4) which can be connected to the fluid line (2) on one side and has an overlap section (5) on its other side, onto which a hose end (6) of the hose (3) to be connected to the connection element (4) can be slid, and a clamping connection (7) by means of which the hose end (6) slid onto the overlap section (5) of the connection element (4) can be clamped on the overlap section (5), characterized in that the connection element (4) is made of a polymer material, and that the connection device (1) has an inner nozzle (8) whose outer diameter corresponds to the inner diameter of the overlap section (5) of the connection element (4).which is inserted into the connection element (4) in the area of ​​the overlap section (5) and whose material has a significantly higher compressive strength than the polymer material of the connection element (4), that the overlap section (5) has on its outer surface two receiving areas (9, 10) for clamping elements (11, 12) of the clamping connection (7), which are separated from each other by a central section (13) with a larger outer diameter, and that the clamping force of the clamping connection (7) is adjustable so that the connection device (1) can be designed without a seal.

2. Connection device according to claim 1, the connection element (4) of which is made of polyethylene.

3. Connection device according to claim 1 or 2, the inner nozzle (8) of which is made of a metallic material, preferably stainless steel.

4. Connection device according to one of claims 1 to 3, wherein the clamping parts (11, 12) of the clamping connection (7) are made of a metallic material.

5. Connection device according to one of claims 1 to 4, wherein the two receiving areas (9, 10) of the overlap section (5) of the connection element (4) have a constant outer diameter.

6. Connection device according to one of claims 1 to 5, wherein the central section (13) of the overlapping section (5) of the connection element (4) has an outer diameter that increases continuously from its two edges to its center.

7. Connection device according to one of claims 1 to 6, wherein the receiving areas (9, 10) of the overlap section (5) of the connection element (4) are limited in the axial direction of the connection element (4) by radial steps on the outer surface of the overlap section (5).

8. Connection device according to one of claims 1 to 7, in which a stop element is arranged on the inner surface of the connection element (4) with a predefinable axial distance to the proximal end of the overlap section (5), by means of which the insertion length of the inner nozzle (8) into the connection element (4) can be limited.

9. Connection device according to one of claims 1 to 8, wherein the inner nozzle (8) projects with its proximal end into the connection element (4) by a predetermined length beyond the overlap section (5).

10. Connection device according to one of claims 1 to 9, wherein the inner nozzle (8) is aligned with its distal end with the end face of the connection element (4).

11. Connection device according to one of claims 1 to 10, the connection element (4) of which is designed as a pipe section (14) at its end section facing the fluid line, the diameter of which is matched to the diameter of the fluid line (2) designed as a pipe.

12. Connection device according to claim 11, in which the pipe section (14) of the connection element (4) can be joined in one piece, preferably welded, to the free end of the fluid line (2) designed as a pipeline.

13. Connection device according to claim 11 or 12, wherein the inner and / or outer diameter of both the overlap section (5) and the pipe section (14) of the connection element (4) can be specified arbitrarily.

14. Connection device according to one of claims 1 to 10, the connection element of which has an overlap section on both sides.

15. Connection device according to claim 14, wherein the inner and / or outer diameter of both overlapping sections of the connection element can be predetermined as desired.

16. Connection device according to one of claims 11 to 15, wherein the inner diameter of the end section of the connection element (4) which is designed as a pipe section (14) and faces the fluid line is adaptable to the inner diameter of the fluid line.

17. Connection device according to one of claims 1 to 16, in which the clamping parts (11, 12) of the clamping connection (7) are displaceable towards and away from each other in the axial direction of the overlap section (5) or the connection element (4), preferably by means of a screw connection arranged in this axial direction.

18. Connection device according to one of claims 1 to 17, comprising a composite flange member (15) which is seated on the outer surface of the hose end (6) pushed onto the overlap section (5) of the connection element (4), with its end face (16) facing the connection element (4) bearing against the clamping part (11) of the clamping connection (7) furthest from the pipe section, and having an outer shell section (17) extending in the axial direction of the connection element (4), wherein the pipe section (14) has an outer shell section (18) extending in the axial direction of the connection element (4), the outer diameter of which corresponds to that of the outer shell section (17) on the composite flange member side, and comprising a protective tube sleeve (19) which surrounds the connection element (4) and the clamping device (7) and whose inner surface is in close contact with the outer shell section (17) on the composite flange member side and the outer shell section on the pipe section side. (18) is sitting.

19. Connection device according to claim 18, wherein the composite flange-side outer jacket section (17) and the pipe section-side outer jacket section (18) are welded to the inner jacket surface of the protective pipe sleeve (19).

20. Connection device according to claim 18, with two ring flanges, one of which is assigned to each end face of the protective tube sleeve (19) and which are preferably connectable to each other by means of a screw connection in such a way that the protective tube sleeve (19) can be fixed in the axial direction of the connection element (4) by means of them.

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