Pipeline end internal expansion forming device

Abstract

The utility model discloses a pipeline end internal expansion forming device which comprises a lower fixing seat, a circular hole formed in the lower fixing seat, a plurality of star-shaped sliding rails fixed on the lower fixing seat, and a plurality of expansion sliding blocks which are slidably sleeved on the sliding rails in a one-to-one correspondence manner and jointly form a cylindrical shape, the tightening spring is arranged on the outer side of the plurality of expansion sliding blocks in a sleeving manner; an inclined wedge opening is formed in the inner side of the expansion sliding block; the tapered wedge openings of the plurality of expanding slide blocks jointly form a tapered hole; a conical column is arranged in the conical hole; the conical column extrudes the expansion sliding blocks and expands a plurality of expansion sliding blocks; the pipeline to be machined is arranged on the expansion sliding block in a sleeving mode. By means of the scheme, the pipe clamp has the advantages of being simple in structure, reliable in machining and the like, and has high practical value and popularization value in the technical field of pipe machining.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline processing, in particular to an internal expansion forming device for a pipeline end portion. Background Art

[0002] The pipeline of this technology is mainly a metal pipeline for gas transportation. Bend pipe connectors and straight pipe connectors are set in the pipeline to connect adjacent pipelines. Take the bend pipe connector as an example, its structure is as follows Figure 1 As shown, an expansion section 200 is provided at the end of the elbow connector body 100. The inner wall of the expansion section 200 is sleeved onto the adjacent pipe. The structure of a straight pipe connector is identical to that of an elbow connector. During the processing of elbow and straight pipe connectors, they are first processed into an intermediate product with the same pipe diameter, and then the pipe ends are expanded. Directly processing elbow and straight pipe connectors into the expansion section 200 is extremely difficult. Currently, there is no corresponding internal expansion mold for pipe ends in the existing technology.

[0003] Therefore, it is urgent to propose a pipe end internal expansion forming device with simple structure and reliable processing. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a device for internal expansion forming of pipe ends. The technical solution adopted by the present invention is as follows:

[0005] A device for internal expansion forming of pipe ends is used to expand and form the ends of pipes to be processed. The device comprises a lower fixed seat, a circular hole provided in the lower fixed seat, several star-shaped slide rails fixed on the lower fixed seat, an expansion slider which is slidably sleeved on the slide rails in a one-to-one manner, has several petals and together forms a cylindrical shape, and a tightening spring sleeved on the outside of the expansion slider with several petals; an oblique wedge opening is provided on the inside of the expansion slider; the oblique wedge openings of the several petals of the expansion slider together form a conical hole; a conical column is provided in the conical hole; the conical column squeezes the expansion slider and unfolds the several petals of the expansion slider; the pipe to be processed is sleeved on the expansion slider; the expansion slider has at least three petals.

[0006] Furthermore, the number of the expansion sliders and the number of the slide rails are six; the tapered holes are regular hexagonal tapered holes; and the tapered columns are regular hexagonal tapered columns.

[0007] Furthermore, the expansion slider includes a lower arc seat, a slide groove opened at the lower part of the lower arc seat and slidably sleeved on the slide rail, several spring mounting grooves annularly opened on the outer side of the lower arc seat, and an expansion arc column arranged at the top of the lower arc seat; the tightening springs are placed in the spring mounting grooves one by one.

[0008] Furthermore, the upper parts of the slide groove and the slide rail are in a dovetail shape.

[0009] Furthermore, two spring mounting grooves are provided.

[0010] Furthermore, a plurality of slide rail mounting grooves are provided on the top of the lower fixing seat; and the slide rails are fixed in the slide rail mounting grooves in a one-to-one correspondence.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The utility model provides a plurality of expansion sliders, which together form a cylindrical shape when closed. The end of the pipe to be processed is placed on the cylindrical shape, and the expansion slider is squeezed and expanded by the conical column to squeeze the end of the pipe to be processed into an inward bulging shape. The utility model has a simple structure and is easy to operate.

[0013] (2) The utility model provides a plurality of spring installation slots and tightening springs to facilitate the recovery of the expansion slider along the slide rail, and its reset is reliable.

[0014] (3) The utility model provides a plurality of slide rails arranged in a star shape and guides the expansion slider to expand and retract, thereby ensuring its reliable operation.

[0015] (4) The utility model has a regular hexagonal conical hole and a regular hexagonal conical column, so the extrusion action is reliable.

[0016] In summary, the utility model has the advantages of simple structure and reliable processing, and has high practical value and promotion value in the field of pipeline processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope of protection. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural diagram of the elbow connector.

[0019] Figure 2 It is a structural diagram of the present utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the utility model without the partial expansion slider.

[0021] Figure 4 This is a structural diagram of the first angle of the expansion slider in the present invention.

[0022] Figure 5This is a structural diagram of the second angle of the expansion slider in the present invention.

[0023] Figure 6 This is a structural diagram of the tapered column in the utility model.

[0024] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0025] 100. Elbow connector body; 200. Expansion section; 1. Lower fixing seat; 2. Slide rail; 3. Expansion slider; 4. Tightening spring; 11. Circular hole; 12. Slide rail mounting slot; 31. Lower arc seat; 32. Spring mounting slot; 33. Slide slot; 34. Expansion arc column; 35. Oblique wedge opening. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of this application more clear, the present invention is further described below with reference to the accompanying drawings and examples. Implementation methods of this invention include, but are not limited to, the following examples. Based on the examples in this application, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] In this embodiment, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0028] In the description and claims of this embodiment, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different objects rather than to describe a specific order of objects.

[0029] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0030] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0031] like Figures 2 to 6As shown, this embodiment provides a device for internal expansion molding of pipe ends, which is used to expand and mold the ends of pipes to be processed. The device includes a lower fixed seat 1, a circular hole 11 provided in the lower fixed seat 1, several star-shaped slide rails 2 fixed to the lower fixed seat 1, an expansion slider 3 that is slidably mounted on the slide rails 2, and has several petals that together form a cylindrical shape, and a tightening spring 4 that is mounted on the outside of the multiple-petal expansion slider 3. An oblique wedge opening 35 is provided on the inner side of the expansion slider 3, and the oblique wedge openings 35 of the multiple petals of the expansion slider 3 together form a tapered hole. In addition, a tapered column is provided in the tapered hole. In this embodiment, the tapered column is used to squeeze the expansion slider 3, and the multiple-petal expansion slider 3 is unfolded to achieve internal expansion molding of the end of the pipe to be processed.

[0032] In this embodiment, the expansion slider 3 comprises a lower arc seat 31, a slide groove 33 defined below the lower arc seat 31 and slidably mounted on the slide rail 2, two spring mounting grooves 32 annularly defined outside the lower arc seat 31, and an expansion arc post 34 positioned at the top of the lower arc seat 31. The tension springs 4 are positioned within the spring mounting grooves 32 in a one-to-one correspondence. In this embodiment, to restrict the movement of the expansion slider 3 along the slide rail 2, the slide grooves 33 and the upper portion of the slide rail 2 are both dovetail-shaped.

[0033] In this embodiment, six expansion sliders 3 and six slide rails 2 are provided. Therefore, the tapered holes are regular hexagonal holes, and the tapered columns are regular hexagonal columns. Furthermore, several slide rail mounting slots 12 are provided at the top of the lower fixing base 1, into which the slide rails 2 are fixed one by one. In this embodiment, a hydraulic drive mechanism connected to the regular hexagonal columns is provided through the circular holes 11 and pushes the regular hexagonal columns to achieve the extrusion and expansion of the expansion slider 3. After the pipe is extruded and expanded, the tightening spring 4 tightens and retracts the expansion slider 3.

[0034] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes based on the design principles of the present invention and any changes made through non-creative work on this basis shall fall within the scope of protection of the present invention.

Claims

1. A pipe end bulging forming device for expanding the end of a pipe to be processed, characterized in that: The invention comprises a lower fixed seat (1), a circular hole (11) provided in the lower fixed seat (1), a plurality of star-shaped slide rails (2) fixed on the lower fixed seat (1), an expansion slider (3) which is slidably sleeved on the slide rails (2) and has a plurality of petals and together forms a cylindrical shape, and a tightening spring (4) sleeved on the outside of the expansion slider (3) having a plurality of petals; an oblique wedge opening (35) is provided on the inside of the expansion slider (3); the oblique wedge openings (35) of the plurality of petals of the expansion slider (3) together form a tapered hole; a tapered column is provided in the tapered hole; the tapered column squeezes the expansion slider (3) and unfolds the plurality of petals of the expansion slider (3); the pipe to be processed is sleeved on the expansion slider (3); the expansion slider (3) has at least three petals.

2. A pipe end bulging device according to claim 1, characterized in that: The expansion sliders (3) and the slide rails (2) are both provided with six; the tapered holes are regular hexagonal tapered holes; and the tapered columns are regular hexagonal tapered columns.

3. A pipe end bulging device according to claim 1 or 2, characterized in that: The expansion slider (3) includes a lower arc seat (31), a slide groove (33) provided at the lower part of the lower arc seat (31) and slidably sleeved on the slide rail (2), a plurality of spring mounting grooves (32) provided in an annular manner on the outer side of the lower arc seat (31), and an expansion arc column (34) provided on the top of the lower arc seat (31); the tightening springs (4) are placed in the spring mounting grooves (32) in a one-to-one correspondence.

4. A pipe end bulging device according to claim 3, characterized in that: The upper portion of the slide groove (33) and the slide rail (2) is in a dovetail shape.

5. The pipe end bulging device according to claim 3, characterized in that: There are two spring installation slots (32).

6. A pipe end internal expansion forming device according to claim 1 or 2, characterized in that: A plurality of slide rail mounting grooves (12) are provided on the top of the lower fixing seat (1); the slide rails (2) are fixed in the slide rail mounting grooves (12) in a one-to-one correspondence.

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