Precision welding steel pipe stable in assembly

Abstract

The utility model relates to the technical field of steel pipes, in particular to a precision welding steel pipe stable in assembly, which comprises a steel pipe body, a connecting piece and a fastening piece, a first connecting flange and a second connecting flange are respectively arranged at two ends of the steel pipe body, and the connecting piece is arranged at one end of the first connecting flange close to the steel pipe body. The connecting piece comprises an elastic piece and a U-shaped plate, the two ends of the elastic piece are connected with the steel pipe bodies and one free end of the U-shaped plate respectively, a clamping groove matched with the other free end of the U-shaped plate is formed in the second connecting flange, the first connecting flanges and the second connecting flanges of the two sets of steel pipe bodies are in butt joint, and the inclined face of the U-shaped plate is aligned with the clamping groove. The elastic piece is initially in a contraction state, along with contact of the first flange and the second flange, after the end of the U-shaped plate is inserted into the clamping groove, the first connecting flange and the second connecting flange are stably connected, the two sets of steel pipes are assembled in cooperation with the fastening piece, operation is easy, and butt joint is precise.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipes, in particular to a precision welded steel pipe with stable assembly. Background Art

[0002] Precision steel pipe is a kind of high-precision steel pipe material after cold drawing or hot rolling. Due to the advantages of no oxide layer on the inner and outer walls of precision steel pipe, no leakage under high pressure, high precision, high finish, no deformation after cold bending, no cracks after expansion and flattening, it is often used in the boiler field;

[0003] When the steel pipes are butt-jointed, an expansion flange is often provided on the outside of the steel pipe to cooperate with fixing parts for locking the butt joint. During the butt joint process, it was found that if the mounting hole of the expansion flange deviates, the butt joint may be unstable, which is time-consuming and labor-intensive. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a precision welded steel pipe with stable assembly.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision welded steel pipe with stable assembly, comprising a steel pipe body, a connecting piece and a fastener, wherein a first connecting flange and a second connecting flange are respectively provided at both ends of the steel pipe body, the connecting piece is provided at one end of the first connecting flange close to the steel pipe body, the connecting piece comprises an elastic piece and a U-shaped plate, the two ends of the elastic piece are respectively connected to the steel pipe body and a free end of the U-shaped plate, the second connecting flange is provided with a card groove matched with the other free end of the U-shaped plate, the fastener comprises a bolt and a nut, the first connecting flange and the second connecting flange are both provided with through holes, the bolt passes through the corresponding through holes on the first connecting flange and the second connecting flange and is connected to the nut.

[0008] In order to ensure the stability of the U-shaped plate in operation, the utility model is improved in that a guide rod is further provided at the center of the U-shaped plate, and a guide hole matched with the guide rod is further provided on the first connecting flange.

[0009] Preferably, the other free end of the U-shaped plate is provided with a slope.

[0010] Preferably, the elastic member includes a spring and a telescopic rod, the spring is sleeved on the telescopic rod, and both ends of the spring and the telescopic rod are respectively connected to the steel pipe body and the U-shaped plate.

[0011] In order to ensure the stability of equipment assembly, the utility model is improved in that the connecting pieces and the fasteners are arranged in a plurality of groups evenly, and the fasteners are arranged on the peripheral sides of the connecting pieces.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a precision welded steel pipe with stable assembly, which has the following beneficial effects:

[0014] The assembly is stable and the precision welded steel pipe has the first connecting flange and the second connecting flange of the two groups of steel pipe bodies butted against each other, the inclined surface of the U-shaped plate is aligned with the slot, the elastic member is initially in a contracted state, as the first flange contacts the second flange, when the end of the U-shaped plate is inserted into the slot, the first connecting flange and the second connecting flange are stably connected, and then the fasteners are used to complete the assembly of the two groups of steel pipes, the operation is simple, and the butt connection is precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure assembly of the utility model;

[0016] Figure 2 This is a first main view schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a second main view schematic diagram of the structure of the utility model;

[0018] Figure 4 The utility model structure Figure 3 A partial enlarged schematic diagram is shown in the figure.

[0019] In the figure: 1. steel pipe body; 2. first connecting flange; 3. second connecting flange; 4. U-shaped plate; 5. bolt; 6. nut; 7. guide rod; 8. inclined plane; 9. spring; 10. telescopic rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4, a precision welded steel pipe with stable assembly, comprising a steel pipe body 1, a connecting piece and a fastener, wherein the first connecting flange 2 and the second connecting flange 3 are respectively provided at both ends of the steel pipe body 1, the first connecting flange 2 is provided with the connecting piece close to one end of the steel pipe body 1, the connecting piece comprises an elastic piece and a U-shaped plate 4, the two ends of the elastic piece are respectively connected to the steel pipe body 1 and a free end of the U-shaped plate 4, the second connecting flange 3 is provided with a card groove adapted to the other free end of the U-shaped plate 4, the fastener comprises a bolt 5 and a nut 6, the first connecting flange 2 and the second connecting flange 3 are both provided with through holes, the bolt 5 penetrates through the corresponding through holes on the first connecting flange 2 and the second connecting flange 3 and is connected to the nut 6.

[0022] During actual use, the first connecting flange 2 and the second connecting flange 3 corresponding to the two groups of steel pipe assemblies are in contact, and the first connecting flange 2 and the second connecting flange 3 are respectively arranged at the two ends of the steel pipe body 1. Initially, the elastic member is in a contracted state. According to needs, a positioning groove can be provided at the end of the second connecting flange 3 away from the first connecting flange 2, so that the positioning groove contacts the free end of the U-shaped plate 4. As the first connecting flange 2 and the second connecting flange 3 contact, the elastic member is first stretched, and then when the slot is aligned with the free end of the U-shaped plate 4, the end of the U-shaped plate 4 is inserted into the slot. At this time, the corresponding through holes are aligned, and the bolts 5 are matched with the nuts 6 to conveniently ensure the stable connection of the two groups of steel pipes. The connecting parts and fasteners are arranged in several groups and are evenly arranged. The fasteners are arranged on the surrounding side of the connecting parts to ensure the stability of the overall assembly of the equipment.

[0023] In this embodiment, a guide rod 7 is further provided at the center of the U-shaped plate 4 , and a guide hole matched with the guide rod 7 is also provided on the first connecting flange 2 . The guide rod 7 further ensures the stability of the movement of the U-shaped plate 4 .

[0024] In actual use, the other free end of the U-shaped plate 4 is provided with an inclined surface 8 to facilitate the feeding of the two groups of steel pipe assemblies.

[0025] During actual use, it is necessary to ensure the stability of the movement of the U-shaped plate 4. To this end, the elastic member includes a spring 9 and a telescopic rod 10. The spring 9 is sleeved on the telescopic rod 10. Both ends of the spring 9 and the telescopic rod 10 are respectively connected to the steel pipe body 1 and the U-shaped plate 4. The spring 9 facilitates the resetting of the U-shaped plate 4, and the telescopic rod 10 ensures its stability.

[0026] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0028] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision welded steel pipe with stable assembly, comprising a steel pipe body (1), a connecting piece and a fastener, characterized in that: The steel pipe body (1) is provided with a first connecting flange (2) and a second connecting flange (3) at both ends, the first connecting flange (2) is provided with the connecting member near one end of the steel pipe body (1), the connecting member comprises an elastic member and a U-shaped plate (4), the two ends of the elastic member are respectively connected to the steel pipe body (1) and one free end of the U-shaped plate (4), the second connecting flange (3) is provided with a slot matched with the other free end of the U-shaped plate (4), the fastener comprises a bolt (5) and a nut (6), the first connecting flange (2) and the second connecting flange (3) are both provided with through holes, the bolt (5) passes through the corresponding through holes on the first connecting flange (2) and the second connecting flange (3) and is connected to the nut (6).

2. The assembly-stable precision welded steel pipe according to claim 1, characterized in that: A guide rod (7) is also provided at the center of the U-shaped plate (4), and a guide hole matching the guide rod (7) is also provided on the first connecting flange (2).

3. The assembly-stable precision welded steel pipe according to claim 2, characterized in that: The other free end of the U-shaped plate (4) is provided with an inclined surface (8).

4. The assembly-stable precision welded steel pipe according to claim 3, characterized in that: The elastic member comprises a spring (9) and a telescopic rod (10), wherein the spring (9) is sleeved on the telescopic rod (10), and both ends of the spring (9) and the telescopic rod (10) are respectively connected to the steel pipe body (1) and the U-shaped plate (4).

5. The assembly-stable precision welded steel pipe according to claim 4, characterized in that: The connecting members and the fastening members are both arranged in a plurality of groups and are evenly arranged, and the fastening members are arranged on the peripheral sides of the connecting members.

Images