Device for improving out-of-roundness of aluminum pipe of lap welding aluminum-plastic composite pipe

Abstract

The utility model provides a device for improving the out-of-roundness of overlap welding aluminum-plastic composite pipe aluminum pipe, which comprises a working platform, a guide structure, a first extrusion structure, a second extrusion structure and an in-pipe support structure, the guide structure is arranged on the top of the working platform and is used for guiding a pipe to be extruded, and the first extrusion structure and the second extrusion structure are arranged on the working platform. The feeding end of a to-be-extruded pipe is sleeved with the first extrusion structure and the second extrusion structure, and an in-pipe supporting structure is installed in the to-be-extruded pipe. The device has the advantages that the metal positioning steel ring is additionally arranged on the outer side of the core rod after the inner wall of the pipe is formed, a lap joint aluminum layer in the pipe is evenly extruded by the metal positioning steel ring, and the first extrusion structure and the second extrusion structure are arranged at the positions, corresponding to the metal positioning steel ring, outside the pipe. And the thickness of the lapped part of the final pipe can be reduced by 20-30% compared with the thickness of two layers of pipes, so that the out-of-roundness and the wall thickness of the lapped and welded aluminum-plastic composite pipe are effectively controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of composite pipe aluminium pipe lap joint equipment, especially a kind of device for improving the out-of-roundness of lap joint welded aluminium plastic composite pipe aluminium pipe. BACKGROUND

[0002] Currently lap joint welded aluminium plastic composite pipe adopts lap joint welded aluminium pipe as embedded metal layer reinforcement, which is composed of heat-melt adhesive and inner and outer layer random copolymer polypropylene (PP-R) material. The pipe not only retains the heat resistance, sanitary performance and other characteristics of PP-R pipe, but also has excellent long-term hydrostatic strength and creep resistance under high temperature conditions, and can be applied to cold and hot water supply, drinking water and heating pipeline system for building interior decoration.

[0003] In lap joint welded aluminium plastic composite pipe, the metal aluminium layer adopts ultrasonic lap welding process, and after roller welding, the lap joint is still thicker, which can be observed through the longitudinal section of pipe, to provide the most intuitive and convenient method for identifying aluminium plastic composite pipe welding process. The thickness and out-of-roundness of inner and outer plastic layers can be accurately controlled during extrusion process, while the two aluminium strips at lap joint are obviously different in thickness compared with single aluminium strip at other positions, which causes obstacles for total wall thickness deviation and out-of-roundness control of pipe, and increases the difficulty of production and processing. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a device for improving the out-of-roundness of lap joint welded aluminium plastic composite pipe aluminium pipe to solve the problem of obvious thickness difference at lap joint of aluminium plastic composite pipe, which causes obstacles for total wall thickness deviation and out-of-roundness control of pipe, and increases the difficulty of production and processing.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A device for improving the out-of-roundness of lap joint welded aluminium plastic composite pipe aluminium pipe, comprising working platform, guide structure, first extrusion structure, second extrusion structure and pipe inner support structure, guide structure is installed on the top of working platform, and guide structure is used for guiding pipe to be extruded, pipe to be extruded feeding end is respectively sleeved with first extrusion structure and second extrusion structure, and pipe inner support structure is installed inside pipe to be extruded.

[0007] Further, the guide structure comprises guide base and a plurality of guide support frames, the guide base is installed on the bottom of working platform, and a plurality of guide support frames are equidistantly arranged on the top of guide base.

[0008] Further, the first extrusion structure comprises a first extrusion frame, an extrusion positioning clamp, a plurality of first pressure rollers and a plurality of adjusting screws, the first extrusion frame is installed to the work platform, the extrusion positioning clamp is installed in the first extrusion frame, the plurality of first pressure rollers are installed in the extrusion positioning clamp, and the first pressure rollers are used for extruding the pipe to be extruded, and each first pressure roller is connected with an adjusting screw.

[0009] Further, the number of the first pressure rollers and the adjusting screws is four.

[0010] Further, the second extrusion structure comprises a second extrusion frame and two second pressure rollers, the second extrusion frame is installed to the work platform, and the two second pressure rollers are arranged in the second extrusion frame and arranged on the two sides of the pipe to be extruded.

[0011] Further, the pipe inner support structure comprises a core rod and two positioning half-rings, the two positioning half-rings are arranged on the outer side of the core rod and are connected to the pipe to be extruded.

[0012] Further, the two positioning half-rings form an open ring structure.

[0013] Further, a plurality of concave-convex grooves are arranged on the two sides of the two positioning half-rings, and the two positioning half-rings are symmetrically arranged on the two sides of the core rod.

[0014] Compared with the prior art, the device for improving the out-of-roundness of the aluminum pipe of the lap-welded aluminum-plastic composite pipe has the following advantages:

[0015] The device for improving the out-of-roundness of the aluminum pipe of the lap-welded aluminum-plastic composite pipe comprises a core rod and two positioning half-rings, the two positioning half-rings are arranged on the outer side of the core rod and are connected to the pipe to be extruded. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 The overall structure schematic view described in the embodiments of the present application;

[0018] Figure 2 The work platform schematic view described in the embodiments of the present application;

[0019] Figure 3 A guiding structure schematic view according to an embodiment of the utility model;

[0020] Figure 4 A first extrusion structure schematic view according to an embodiment of the utility model;

[0021] Figure 5 A second extrusion structure schematic view according to an embodiment of the utility model;

[0022] Figure 6 A second pressure wheel or first pressure wheel schematic view according to an embodiment of the utility model;

[0023] Figure 7 A pipe internal support structure schematic view according to an embodiment of the utility model;

[0024] Figure 8 A positioning half ring schematic view according to an embodiment of the utility model.

[0025] Marking of drawing:

[0026] 1, work platform;2, guiding structure;21, guiding base;22, guiding support frame;3, first extrusion structure;31, first extrusion frame;32, extrusion positioning hoop;33, first pressure wheel;34, adjusting screw;4, second extrusion structure;41, second extrusion frame;42, second pressure wheel;5, pipe internal support structure;51, core rod;52, positioning half ring;6, to be extruded pipe material. Specific implementation

[0027] It needs to be explained that the embodiments in the utility model and the features in the embodiments can be combined mutually without conflict.

[0028] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0029] In the description of the utility model, it is necessary to explain, unless there is definite stipulation and limitation, the term "installation", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the above-mentioned term can be understood by the specific meaning in the utility model through specific circumstances.

[0030] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] As Figures 1 to 8 The utility model discloses a device for improving the non-roundness of aluminium pipe of lap welding aluminium plastic composite pipe material, which comprises a working platform 1, a guide structure 2, a first extrusion structure 3, a second extrusion structure 4 and an inner pipe supporting structure 5, the guide structure 2 is installed on the top of the working platform 1 and is used for guiding a pipe material 6 to be extruded, the pipe material 6 to be extruded is respectively sleeved with the first extrusion structure 3 and the second extrusion structure 4 at the feeding end, and the inner pipe supporting structure 5 is installed in the pipe material 6 to be extruded.

[0032] The device increases metal positioning steel rings (i.e. two positioning half rings 52 of the inner pipe supporting structure 5) outside the mandrel after the inner wall of the pipe material is formed, the inner aluminium layer of the pipe material is uniformly extruded by the metal positioning steel rings, the pressing wheels (i.e. the first pressing wheel 33 of the first extrusion structure 3 and the second pressing wheel 42 of the second extrusion structure 4) are arranged at the positions corresponding to the metal positioning steel rings outside the pipe material, and the inner and outer parts jointly act, so that the thickness of the lap joint of the pipe material can be reduced by 20%-30% compared with the thickness of the two-layer pipe material, and the non-roundness and wall thickness size of the lap welded aluminium plastic composite pipe material are effectively controlled.

[0033] In a preferred embodiment of the utility model, the working platform 1 can be a fixed-height cuboid platform structure in actual use, or a hydraulic mechanism can be additionally arranged at the bottom of the working platform 1, so that the height of the working platform 1 can be adjusted to be suitable for pipe material processing with different height requirements.

[0034] In a preferred embodiment of the utility model, the guide structure 2 comprises a guide base 21 and a plurality of guide supporting frames 22, the guide base 21 is installed at the bottom of the working platform 1, a plurality of guide supporting frames 22 are equidistantly arranged at the top of the guide base 21, and the guide supporting frames 22 can be determined according to actual conditions; in the embodiment, the number of the guide supporting frames 22 is four, and in actual use, the inside of the guide supporting frame 22 is isosceles trapezoidal or arc-shaped, so as to facilitate the guiding of the pipe material 6 to be extruded.

[0035] In the preferred embodiment of the utility model, the first extrusion structure 3 includes a first extrusion frame 31, an extrusion positioning clamp 32, a plurality of first pressure rollers 33 and a plurality of adjusting screws 34, the first extrusion frame 31 is installed to the work platform 1, the extrusion positioning clamp 32 is installed inside the first extrusion frame 31, a plurality of first pressure rollers 33 are installed inside the extrusion positioning clamp 32, the first pressure rollers 33 are used to extrude the pipe to be extruded 6, each first pressure roller 33 is connected with an adjusting screw 34, in this embodiment, the first extrusion frame 31 is a rectangular frame structure, two extrusion positioning clamps 32 are arranged, four first pressure rollers 33 are arranged in one extrusion positioning clamp 32, in actual use, a plurality of extrusion positioning clamps 32 can be arranged to extrude the pipe to be extruded 6, three or four first pressure rollers 33 can be arranged in one extrusion positioning clamp 32, in this way, the extrusion positioning clamp 32 and the first pressure roller 33 extrude the pipe to be extruded 6 in the pushing process, it should be noted that the extrusion positioning clamp 32 is a whole clamp structure outside, an inner ring structure is arranged inside the extrusion positioning clamp 32, the inner ring structure is divided into four detachable parts (according to the number of first pressure rollers 33, if there are only three first pressure rollers 33, the inner ring structure is divided into three detachable parts), one end of the adjusting screw 34 is not directly connected with the first pressure roller 33, but is rotationally connected through a part of the inner ring structure (namely an arc-shaped connecting plate), when the adjusting screw 34 is screwed, the arc-shaped connecting plate does not rotate, but moves to the circumferential radial direction of the cross section of the pipe to be extruded 6 under the pushing of the thread rotation of the adjusting screw 34 (namely taking the axis of the pipe to be extruded 6 as the center, the cross section as the circular surface, the radius direction of the circular surface is the moving direction of the adjusting screw 34), when the first extrusion structure 3 is used to extrude the pipe to be extruded 6, the adjusting screw 34 is screwed, then the arc-shaped connecting plate moves to the axis direction of the pipe to be extruded 6 with the first pressure roller 33, so that the first pressure roller 33 can extrude the surface of the pipe to be extruded 6.

[0036] In the preferred embodiment of the utility model, the second extrusion structure 4 includes a second extrusion frame 41 and two second pressure rollers 42, the second extrusion frame 41 is installed to the work platform 1, two second pressure rollers 42 are arranged inside the second extrusion frame 41, the two second pressure rollers 42 are arranged on the two sides of the pipe to be extruded 6, in this embodiment, the second extrusion frame 41 is also a rectangular frame structure, the two second pressure rollers 42 can be installed with the pipe to be extruded 6, which can also be achieved by the adjusting screw 34 of the first extrusion structure 3, or can be achieved by the existing screw or air cylinder drive, in actual use, the second extrusion structure 4 can realize the re-extrusion of the pipe to be extruded 6, thereby improving the non-circularity of the aluminum pipe of the overlapped welded aluminum plastic composite pipe.

[0037] In a preferred embodiment of the utility model, the pipe inner support structure 5 includes a mandrel 51 and two positioning half rings 52, the two positioning half rings 52 are sleeved outside the mandrel 51, and the two positioning half rings 52 are externally sleeved to the pipe to be extruded 6. In actual use, one positioning half ring 52 is sleeved to each side of the mandrel 51, and the length of the mandrel 51 and the positioning half ring 52 can be determined according to the length of the pipe to be extruded 6.

[0038] In a preferred embodiment of the utility model, the two positioning half rings 52 form an open ring structure. This arrangement is to save costs. The two sides of the positioning half ring 52 can be provided with a plurality of concave-convex grooves, so that the two positioning half rings 52 can be symmetrically arranged on both sides of the mandrel 51. It should be noted that, since the two positioning half rings 52 form an open ring structure, the unconnected part cannot be placed against the lap joint of the pipe to be extruded 6, so as to avoid that the inside of the lap joint of the pipe to be extruded 6 is not supported by the positioning half ring 52.

[0039] The working principle of the device for improving the non-circularity of the lap-welded aluminum plastic composite pipe aluminum pipe is as follows:

[0040] In actual use, the pipe inner support structure 5 is first installed to the pipe to be extruded 6, then the pipe to be extruded 6 is installed into the first extrusion structure 3 and the second extrusion structure 4, and finally the external driving source is opened to push the pipe to be extruded 6, so that the lap joint of the pipe to be extruded 6 can be extruded, thereby improving the non-circularity of the lap-welded aluminum plastic composite pipe aluminum pipe.

[0041] The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. An apparatus for improving the out-of-roundness of the aluminum tube of a lap welded aluminum plastic composite pipe, characterized by: The utility model provides an extrusion device for pipe, including work platform (1), guide structure (2), first extrusion structure (3), second extrusion structure (4) and pipe inner support structure (5), work platform (1) top installs guide structure (2), and guide structure (2) is used to guide the pipe (6) to be extruded, and the pipe (6) to be extruded feed end respectively sets up first extrusion structure (3), second extrusion structure (4), and the pipe (6) to be extruded inside installs pipe inner support structure (5).

2. A device for improving the out-of-roundness of the aluminum pipe of the plastic-aluminum composite pipe with lap welding according to claim 1, characterized in that: The guide structure (2) includes a guide base (21) and a plurality of guide support frames (22), the guide base (21) is mounted to the work platform (1), and a plurality of guide support frames (22) are equidistantly arranged on the top of the guide base (21).

3. A device for improving the out-of-roundness of the aluminum pipe of the plastic composite pipe with lap welded aluminum pipe according to claim 1, characterized in that: The first extrusion structure (3) includes a first extrusion frame (31), an extrusion positioning clamp (32), a plurality of first pressure rollers (33), and a plurality of adjusting screws (34), the first extrusion frame (31) is mounted to the work platform (1), the extrusion positioning clamp (32) is mounted inside the first extrusion frame (31), a plurality of first pressure rollers (33) are mounted inside the extrusion positioning clamp, the first pressure rollers (33) are used for extruding the pipe (6) to be extruded, and each first pressure roller (33) is connected to an adjusting screw (34).

4. The apparatus for improving the out-of-roundness of the aluminum pipe of the overlapped welded aluminum-plastic composite pipe according to claim 3, characterized in that: The number of the first pressure rollers (33) and the adjusting screws (34) is four.

5. The apparatus for improving the out-of-roundness of the aluminum pipe of the overlapped welded aluminum-plastic composite pipe according to claim 1, characterized in that: The second extrusion structure (4) includes a second extrusion frame (41) and two second pressure rollers (42), the second extrusion frame (41) is mounted to the work platform (1), and two second pressure rollers (42) are arranged inside the second extrusion frame (41), the two second pressure rollers (42) are arranged on both sides of the pipe (6) to be extruded.

6. The apparatus for improving the out-of-roundness of the aluminum pipe of the overlapped welded aluminum-plastic composite pipe according to claim 1, characterized in that: The pipe inner support structure (5) includes a mandrel (51) and two positioning half-rings (52), the mandrel (51) is sleeved with two positioning half-rings (52) on the outside, and the two positioning half-rings (52) are sleeved to the pipe (6) to be extruded on the outside.

7. A device for improving the out-of-roundness of the aluminum pipe of the overlapped welded aluminum-plastic composite pipe according to claim 6, characterized in that: The two positioning half-rings (52) form an open ring structure.

8. The apparatus for improving the out-of-roundness of the aluminum pipe of the overlapped welded aluminum-plastic composite pipe according to claim 6, characterized in that: The two positioning half-rings (52) are further provided with a plurality of concave-convex grooves on both sides, and the concave-convex grooves are used for symmetrically arranging the two positioning half-rings (52) on both sides of the mandrel (51).

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