Auxiliary tool for assembling and welding pipe fittings

Abstract

The invention provides a pipe fitting assembly welding auxiliary tool which comprises a supporting screw rod and a supporting plate connected to the supporting screw rod in a screwed mode, the supporting plate comprises two rectangular plates, the long sides of the two rectangular plates are connected together, the included angle formed by the two rectangular plates is larger than 90 degrees and smaller than 150 degrees, and the long sides of the two rectangular plates are connected together. A through hole is formed in the front half section of the joint of the two rectangular plates, a nut is fixed between the two rectangular plates, and the center axis of the nut coincides with the center axis of the through hole; the supporting screw rod penetrates through the through hole and is screwed with the nut; and the screwing position of the supporting screw rod and the nut is adjusted, so that the two rectangular plates and the supporting screw rod are supported between the two pipe fittings to be subjected to butt welding. The pipe fitting butt-joint supporting device can be inserted into the butt-joint ends of two pipe fittings to support the interiors of the two pipe fittings, so that the two pipe fittings directly face each other, and one person can complete assembly welding work conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of welding tools, and more specifically, to an auxiliary tool for welding a pipe assembly. Background Art

[0002] In the process of modern construction engineering, metallurgical engineering, coking engineering, chemical engineering, grain and oil engineering, etc., there will be a large number of medium pipeline construction. In the process of pipeline construction, flange connection is a commonly used connection method among pipeline connection methods. Butt-weld flange is different from flat-weld flange, threaded flange and socket-weld flange. Butt-weld flange is a kind of pipe fitting with a neck and a round tube transition, which is used for flanges connected to pipes by butt welding. The outer diameter of the butt-weld flange is the same as the outer diameter of the pipe. The traditional assembly welding method is that one person holds the butt-weld flange and assembles it with the pipe, and the other person welds it. It is time-consuming and labor-intensive, increases labor consumption, and it is difficult to ensure the flatness of the assembly, thus affecting the welding quality. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a pipe assembly welding auxiliary tool, which can be inserted into the butt ends of two pipes, support the inside of the two pipes, make the two pipes face each other, and facilitate one person to complete the assembly welding work.

[0004] The present invention provides a pipe assembly welding auxiliary tool, comprising a support screw and a support plate screwed onto the support screw, wherein:

[0005] The support plate comprises two rectangular plates, the long sides of the two rectangular plates are connected together, the angle formed by the two rectangular plates is greater than 90° and less than 150°, a through hole is provided in the front half of the connection between the two rectangular plates, a nut is fixed between the two rectangular plates, and the central axis of the nut coincides with the central axis of the through hole;

[0006] The support screw passes through the through hole and is screwed to the nut;

[0007] The screw connection position of the support screw and the nut is adjusted so that the two rectangular plates and the support screw are supported between the two pipe fittings to be butt-welded.

[0008] The upper half of the support screw rod is a threaded rod, and the lower half is a smooth rod.

[0009] A rotary handle is arranged on the upper part of the polished rod.

[0010] A nut is arranged at the bottom end of the polished rod.

[0011] The support screw is a full-threaded rod, the support plates are screwed onto the upper and lower ends of the full-threaded rod, and a screw handle is provided in the middle of the full-threaded rod; the screw connection position of the support screw and the nut is adjusted so that the two support plates are supported between the two pipe fittings to be butt-welded.

[0012] The supporting screw rod is a first screw rod and a second screw rod screwed together, and an internal thread matched with the second screw rod is arranged inside the first screw rod.

[0013] The support plate is screwed onto the first screw rod, a screw handle is arranged at the lower end of the first screw rod, and a nut is arranged at the lower end of the second screw rod.

[0014] The nut is an M16 hexagonal nut, and the edge of the nut is welded to the two rectangular plates.

[0015] The width of the rectangular plate is greater than half the length of the support screw.

[0016] The angle formed by the two rectangular plates is 90°, and when the nut is screwed onto the middle of the support screw, the upper end of the rectangular plate is flush with the upper end of the support screw.

[0017] From the above description, it can be known that the pipe assembly welding auxiliary tool provided by the present invention includes a support screw and a V-shaped support plate screwed on the support screw. According to the inner diameter of the pipe, the screw connection between the support screw and the support plate is adjusted. The support plate and the support screw form a support frame body that diverges to the surroundings. The support frame body can be supported between the two pipes to be butt-welded, so that the mouths of the two pipes are aligned without manual assistance. The present invention can conveniently and quickly complete the butt welding of two pipes, assist in butt welding, and improve welding quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 1 of the present invention;

[0020] Figure 2 A side view of a pipe assembly welding auxiliary tool according to Example 1 of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 2 of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 3 of the present invention;

[0023] Among them, 1-support screw, 2-support plate, 21-rectangular plate, 3-through hole, 4-nut, 5-handle, 6-nut, 7-first screw, 8-second screw;

[0024] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0025] The present invention can be subjected to various changes and can have various embodiments, and specific embodiments are illustrated and described in the accompanying drawings. However, the present invention is not limited to the specific implementation, and all changes, equivalents and substitutes falling within the concept and technical scope of the present invention are included, and should be understood to be included.

[0026] Ordinal terms such as first, second, etc. may be used to describe various constituent elements, but the constituent elements are not limited to the terms. The terms are only used to distinguish one constituent element from another constituent element. For example, without departing from the scope of the claims of the present invention, the second constituent element may be named as the first constituent element, and similarly, the first constituent element may be named as the second constituent element. The terms and / or include a combination of multiple associated items or a certain item among multiple associated items.

[0027] It should be understood that when a certain component is mentioned to be "connected" or "contacted" with other components, this includes not only the case where it is directly connected or contacted with other components, but also the case where other components exist in between. Conversely, when a certain component is mentioned to be "directly connected" or "directly contacted" with other components, it should be understood that there are no other components in between.

[0028] In the description of the embodiments, when it is described that a certain component is formed "on or under" another component, on or under includes two components directly contacting each other or at least one other component is arranged and formed between the two components. Moreover, when it is expressed as on or under, it refers to not only the upper direction but also the lower direction based on a certain component.

[0029] The terms used in this application are only used to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly provides otherwise, singular expressions include plural expressions. In this application, it should be understood that terms such as "including" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, parts or combinations thereof recorded in the specification, and do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, parts or combinations thereof.

[0030] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by those skilled in the art. Terms defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of the relevant technology, and if not clearly defined in this application, should not be interpreted as an ideal or overly formal meaning.

[0031] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1

[0033] Figure 1 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 1 of the present invention; Figure 2 A side view of a pipe assembly welding auxiliary tool according to Example 1 of the present invention;

[0034] like Figure 1 and Figure 2 As shown, the pipe fitting assembly welding auxiliary tool proposed in this embodiment can be used to assist in completing the assembly welding of butt-weld flanges and steel pipes, and can also be used for the assembly welding of other pipe fittings.

[0035] The pipe assembly butt welding auxiliary tool comprises a support screw 1 and a support plate 2 screwed on the support screw 1. The support screw 1 is used to form a support frame together with the support plate 2, and the end of a pipe is inserted into it and firmly supported on the inner wall of the pipe. The other pipe is hung on the support plate 2, so that the mouths of the two pipes to be butted are opposite and the central axes are basically aligned. The screwing position of the support screw 1 and the support plate 2 can be adjusted to adapt to the butt welding of pipes with different diameters.

[0036] In order to stably support the circular inner wall of the pipe fitting, the support plate 2 may include two rectangular plates 21, the long sides of the two rectangular plates 21 are connected together, and the angle formed by the two rectangular plates 21 is greater than 90° and less than 150°. A through hole 3 is provided in the front half of the connection between the two rectangular plates 21, and the central axis of the through hole 3 is perpendicular to the connection line. A nut 4 is fixed between the two rectangular plates 21, and the central axis of the nut 4 coincides with the central axis of the through hole 3. The support screw 1 passes through the through hole 3 and is screwed to the nut 4. The through hole 3 can be provided at 1 / 3 of the connection.

[0037] The two rectangular plates 21 form a V-shaped support plate 2. The support screw 1 passes through the connection between the two rectangular plates 21 and is screwed and fixed. When the support screw 1 is vertical, the two rectangular plates 21 are symmetrical about the vertical plane where the support screw 1 is located.

[0038] According to the inner diameter of the pipe fitting, the screw connection position of the support screw 1 and the nut 4 is adjusted, and the edges of the two rectangular plates 21 and the lower end of the support screw 1 can be inscribed on the inner wall circumference of the pipe fitting, and stably supported inside the pipe fitting. The angle between the two rectangular plates 21 should be such that the two rectangular plates 21 and the support screw 1 form a support point that is stably supported around the inner wall.

[0039] The support screw 1 and the front half of the two rectangular plates 21 are supported in the first pipe, and the second pipe is hung on the rear half of the two rectangular plates 21. The angle between the two rectangular plates 21 should be such that the two rectangular plates 21 can stably hang the second pipe, and the angle is not less than 90°.

[0040] In a specific embodiment of the present invention, the upper half of the support screw 1 can be a threaded rod, and the lower half can be a bare rod. The support plate 2 is screwed to the threaded rod of the upper half of the support screw 1, and the support plate 2 is rotated to adjust the connection position with the threaded rod, so that the three support points of the lower end of the support screw 1 and the edges of the two rectangular plates 21 are on the same circumference, which is the same as the circumference of the inner wall of the pipe. The front half of the support plate 2 and the support screw 1 are inserted into the first pipe, and the back half of the support plate 2 is inserted into the second pipe. The ports of the two pipes are aligned, and a welding gap is left between them.

[0041] In a specific embodiment of the present invention, in order to facilitate the rotation of the support plate 2 and the support screw 1, a handle 5 is provided on the upper part of the polished rod. The handle 5 can be a crossbar vertically welded on the polished rod.

[0042] In a specific embodiment of the present invention, in order to stably support the polished rod on the inner wall of the pipe, a nut 6 is provided at the bottom end of the polished rod. The nut 6 can increase the contact area between the polished rod and the inner wall of the pipe, which is convenient for stable support.

[0043] In a specific embodiment of the present invention, the nut 4 can be an M16 hexagonal nut 4, and the edge of the nut 4 is welded to the two rectangular plates 21. The nut 4 spans between the two rectangular plates 21 and is welded, and the support screw 1 is an M16 screw, and the thicker screw can provide stable support.

[0044] In a specific embodiment of the present invention, in order to facilitate the support of the rectangular plate 21, the width of the rectangular plate 21 is greater than half the length of the support screw 1. The width of the rectangular plate 21 can be slightly greater than half the length of the support screw 1. The support plate 2 is located at any position upward from the middle of the support screw 1, and can support the pipe fittings, and can be adapted to support pipe fittings of various diameters.

[0045] In a specific embodiment of the present invention, in order to facilitate material acquisition, the support plate 2 can be made of angle steel, and a 90° angle steel is used in this embodiment. The angle formed by the two rectangular plates 21 is 90°, and when the nut 4 is screwed to the middle of the support screw 1, the upper end of the rectangular plate 21 is flush with the upper end of the support screw 1. The support plate 2 can be adjusted and fixed upward from the middle of the support screw 1, and is supported together with the support screw 1 inside the pipe fitting.

[0046] The pipe fitting assembly welding auxiliary tool can also be used for the assembly welding of square pipe fittings. The edges of the two rectangular plates 21 of the support plate 2 are supported on the inner side of the upper wall of the square pipe fitting, and the support screw 1 is supported on the inner side of the lower wall of the square pipe fitting.

[0047] Example 2

[0048] Figure 3 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 2 of the present invention;

[0049] like Figure 3 As shown, the pipe assembly welding auxiliary tool provided in this embodiment is based on Embodiment 1. In order to further stably support the pipe, especially the pipe with a larger diameter, the support screw 1 can be a full-threaded rod, and support plates 2 are screwed on the upper and lower ends of the full-threaded rod, and a handle 5 is provided in the middle of the full-threaded rod.

[0050] The edges of the four rectangular plates 21 are used as supporting edges and supported on the inner wall of the pipe fitting, which makes the support more stable and firm. Another pipe fitting is sleeved on the four rectangular plates 21, and the matching is more accurate, which can assist in the butt welding of pipe fittings with larger diameters.

[0051] By adjusting the screw connection positions of the support screw rod 1 and the two nuts 4, the two support plates 2 can be suitable for supporting pipes of various diameters.

[0052] Example 3

[0053] Figure 4 It is a structural schematic diagram of a pipe assembly welding auxiliary tool according to Example 3 of the present invention;

[0054] like Figure 4 As shown, the pipe assembly welding auxiliary tool provided in this embodiment is based on Embodiment 1. In order to be further suitable for pipes of different diameters, the support screw 1 can be a first screw 7 and a second screw 8 screwed together, and an internal thread matching the second screw 8 is provided inside the first screw 7.

[0055] When the diameter of the pipe is large, the support screw 1 can be lengthened by adjusting the screw connection length of the first screw 7 and the second screw 8 so that the support screw 1 and the edges of the two rectangular plates 21 form suitable support points.

[0056] The support plate 2 can be screwed onto the first screw rod 7. A screw handle 5 is provided at the lower end of the first screw rod 7 to facilitate the rotation of the support plate 2 and the first screw rod 7. The support plate 2 can adjust its position on the first screw rod 7. A nut 6 is provided at the lower end of the second screw rod 8. The nut 6 can stably support the lower end of the second screw rod 8 on the inner wall of the pipe.

[0057] The above describes the pipe assembly welding auxiliary tool according to the present invention by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the pipe assembly welding auxiliary tool proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A pipe assembly welding auxiliary tool, characterized in that: It includes a support screw and a support plate screwed on the support screw, wherein: The support plate comprises two rectangular plates, the long sides of the two rectangular plates are connected together, the angle formed by the two rectangular plates is greater than 90° and less than 150°, a through hole is provided in the front half of the connection between the two rectangular plates, a nut is fixed between the two rectangular plates, and the central axis of the nut coincides with the central axis of the through hole; The support screw passes through the through hole and is screwed to the nut; The screw connection position of the support screw and the nut is adjusted so that the two rectangular plates and the support screw are supported between the two pipe fittings to be butt-welded.

2. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The upper half of the support screw rod is a threaded rod, and the lower half is a smooth rod.

3. The pipe assembly welding auxiliary tool according to claim 2, characterized in that: A rotary handle is arranged on the upper part of the polished rod.

4. The pipe assembly welding auxiliary tool according to claim 2, characterized in that: A nut is arranged at the bottom end of the polished rod.

5. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The support screw rod is a full-thread rod, the upper and lower ends of the full-thread rod are both screwed to the support plate, and a screw handle is provided in the middle of the full-thread rod; The screw connection position between the support screw and the nut is adjusted so that the two support plates are supported between the two pipe fittings to be butt-welded.

6. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The supporting screw rod is a first screw rod and a second screw rod screwed together, and an internal thread matched with the second screw rod is arranged inside the first screw rod.

7. The pipe assembly welding auxiliary tool according to claim 6, characterized in that: The support plate is screwed onto the first screw rod, a screw handle is arranged at the lower end of the first screw rod, and a nut is arranged at the lower end of the second screw rod.

8. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The nut is an M16 hexagonal nut, and the edge of the nut is welded to the two rectangular plates.

9. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The width of the rectangular plate is greater than half the length of the support screw.

10. The pipe assembly welding auxiliary tool according to claim 1, characterized in that: The angle formed by the two rectangular plates is 90°, and when the nut is screwed onto the middle of the support screw, the upper end of the rectangular plate is flush with the upper end of the support screw.

Images