Composite pipe expanding head

Abstract

The utility model provides a composite pipe expanding head, and belongs to the technical field of pipe fitting flaring tools. The pipe expanding head solves the problems that an existing pipe expanding head is single in structure and needs to be replaced frequently when different-size flaring is conducted on the same pipe fitting. The composite pipe expanding head comprises a connecting sleeve and a flaring assembly which is installed in the connecting sleeve and used for expanding a pipe end opening, the flaring assembly is formed by a plurality of flaring tables in a surrounding mode, the flaring assembly is sleeved with a spring, and each flaring table is in a step shape and is composed of at least two layers of flaring parts. The flaring parts on the flaring tables are mutually surrounded to form a flaring head of a multi-layer structure, the flaring head is of a concentric shaft structure, and the diameter of each flaring head is gradually increased from the outer end to the inner end. The device has the advantage that the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe expanding tools and relates to a pipe expanding head, in particular to a composite pipe expanding head. Background Art

[0002] At present, the market usually uses a pipe expansion head for expanding pipe fittings. The pipe expansion head is used with a pipe expansion pliers. The pipe fitting is put on the expanding position of the pipe expansion head, and the expanding part is opened and closed by the pipe expansion insert, thereby expanding the pipe fitting port.

[0003] However, due to the different expansion sizes of pipe fittings, currently one expansion head can only expand one diameter size. Some pipe fittings need to be expanded multiple times at their ports, and for multiple different diameter sizes, so the expansion head needs to be replaced frequently, which is very inconvenient. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and provides a composite pipe expanding head which can expand pipes with different diameters without frequent replacement of the pipe expanding head.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a composite expanding head, including a connecting sleeve and a expanding component installed in the connecting sleeve to realize the function of expanding the pipe port, the expanding component is composed of a plurality of expanding platforms surrounded by each other, and a spring is sleeved on the expanding component, characterized in that each of the expanding platforms is stepped and composed of at least two layers of expanding parts, the expanding parts on each of the expanding platforms surround each other to form a multi-layer expanding head, and the expanding head is a concentric axis structure, and the diameter of each expanding head gradually increases from the outer end toward the inner end.

[0006] In the above-mentioned composite pipe expanding head, the upper and lower adjacent expanding portions are transitioned by a circular arc.

[0007] In the above-mentioned composite pipe expanding head, the outside of the connecting sleeve has anti-slip grooves.

[0008] Compared with the prior art, the composite pipe expanding head has the advantage of improving working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a stereoscopic diagram of the composite pipe expansion head.

[0010] In the figure, 1. connecting sleeve; 2. flaring platform; 3. flaring part; 4. flaring end portion; 5. anti-slip pattern. DETAILED DESCRIPTION

[0011] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0012] like Figure 1 As shown, the composite expanding head comprises a connecting sleeve 1 and a expanding assembly installed in the connecting sleeve 1 to expand the pipe port. The expanding assembly is composed of a plurality of expanding stages 2 which are surrounded by each other. A spring is provided on the expanding assembly to facilitate the automatic resetting and contraction of the expanding stages 2 after the expansion is completed. Each expanding stage 2 is stepped and consists of at least two layers of expanding portions 3. The expanding portions 3 on each expanding stage 2 surround each other to form an expanding head 4 with a multi-layer structure, and the expanding head 4 is a concentric axis structure. The diameter of each expanding head 4 gradually increases from the outer end to the inner end. The outer diameter of each layer of the expanding head 4 is different and is set according to different standard sizes of pipe fittings. Therefore, multi-layer expanding of the pipe fitting can be performed without replacing the expanding head.

[0013] Preferably, the upper and lower adjacent flared portions 3 are transitioned by an arc.

[0014] Preferably, the connecting sleeve 1 has anti-slip grooves 5 on the outside.

[0015] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0016] Although the terms such as connecting sleeve 1, flaring platform 2, flaring portion 3, flaring head 4, anti-slip pattern 5 are frequently used in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A composite pipe expansion head, comprising a connecting sleeve (1) and a flaring assembly installed in the connecting sleeve (1) to expand the pipe end, the flaring assembly being composed of a plurality of flaring stages (2) surrounding each other, a spring being provided on the flaring assembly, characterized in that: Each of the expanding platforms (2) is in a stepped shape and is composed of at least two layers of expanding parts (3). The expanding parts (3) on each of the expanding platforms (2) surround each other to form an expanding head (4) with a multi-layer structure. The expanding head (4) is a coaxial structure. The diameter of each of the expanding heads (4) gradually increases from the outer end to the inner end.

2. A composite pipe expansion head according to claim 1, characterized in that: The upper and lower adjacent expanded portions (3) are transitioned by an arc.

3. A composite pipe expansion head according to claim 1, characterized in that: The connecting sleeve (1) has anti-slip grooves (5) on the outside.

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