Pre-fixed cold-drawn precision welded steel pipe

Abstract

A cold-drawn precision welding steel pipe is pre-fixed, two positioning sleeves are symmetrically arranged on a first steel pipe, butt joint plates are fixedly arranged at the two ends of each positioning sleeve, a positioning shaft is rotationally arranged on one side of each butt joint plate, a supporting rod is fixedly arranged at the outer end of each positioning shaft, and a first through hole is formed in the bottom of each supporting rod; a positioning plate is fixedly arranged in the middle of the butt-joint plate, a plurality of supporting rods and positioning blocks are arranged, the second steel pipe can be limited, a butt-joint flange on the second steel pipe and a butt-joint flange on the first steel pipe cannot be dislocated, and when bolts on the flange plate are operated, the butt-joint flange on the first steel pipe cannot be dislocated. The butt joint position of the first steel pipe and the second steel pipe does not need to be manually supported, and the first steel pipe and the second steel pipe can be conveniently in butt joint.

Description

Technical Field

[0001] The utility model relates to the technical field of welded steel pipes, in particular to a pre-fixed cold-drawn precision welded steel pipe. Background Art

[0002] Precision welded steel pipe is a kind of pipe with the characteristics of precise geometric dimensions, excellent weld and internal and external surface quality, and uniform wall thickness. It is often used in boiler systems.

[0003] Existing precision welded steel pipes lack a pre-fixed structure when in use. When operating the bolts on the flange plate, manual support is required for the joint of the steel pipes, which makes it difficult to connect the welded steel pipes. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a pre-fixed cold-drawn precision welded steel pipe.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-fixed cold-drawn precision welded steel pipe, comprising a first steel pipe and a second steel pipe, two positioning sleeves are symmetrically arranged on the first steel pipe, and docking plates are fixedly arranged at both ends of the positioning sleeve, a positioning shaft is rotatably arranged on one side of the docking plate, a support rod is fixedly arranged at the outer end of the positioning shaft, a first through hole is provided at the bottom of the support rod, a positioning plate is fixedly provided at the middle part of the docking plate, a second through hole is provided on the positioning plate, and limit rods passing through the first through hole and the second through hole are also provided on both sides of the positioning sleeve, a positioning seat is provided at the end of the support rod away from the first through hole, and a positioning block for lifting the second steel pipe is provided on the positioning seat, and a screw is provided at the lower end of the positioning block that passes through the positioning seat, the screw is threadedly connected to the positioning seat, and the top of the screw is rotatably connected to the positioning block.

[0008] In order to facilitate the docking of the two docking plates, the present invention has the following improvement: the two docking plates are docked by bolts.

[0009] In order to make the limiting rod installed more firmly, the improvement of the present invention is that the limiting rod is threadedly connected to the first through hole.

[0010] In order to improve the stability of the positioning block during lifting, the present invention has the following improvements: a cavity is provided on the positioning seat, and a guide rod is provided at the lower end of the positioning block and is inserted into the cavity.

[0011] Furthermore, the present invention is improved in that the inner side of the positioning block is provided with an inclined surface that contacts the outer wall of the second steel pipe.

[0012] Furthermore, the present invention has been improved in that a plurality of balls contacting the outer wall of the second steel tube are provided on the inclined surface.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides a pre-fixed cold-drawn precision welded steel pipe, which has the following beneficial effects:

[0015] The pre-fixed cold-drawn precision welded steel pipe is first fixed with two support rods at the bottom of the positioning sleeve, and the screw is rotated. Through the action of the threaded structure, the positioning block can be raised or lowered, so that the docking flanges on the first steel pipe and the second steel pipe are on the same horizontal plane. Then, the two support rods at the top of the positioning sleeve are fixed. The second steel pipe can be limited by the multiple support rods and the positioning block. The docking flange on the second steel pipe will not be misaligned with the docking flange on the first steel pipe. When operating the bolts on the flange plate, there is no need to manually support the docking point of the first steel pipe and the second steel pipe, so the first steel pipe and the second steel pipe can be easily docked.

[0016] Moreover, the positions of the plurality of positioning blocks can be temporarily adjusted, so that the plurality of positioning blocks can conveniently limit the second steel pipes with different diameters, and the second steel pipes with different diameters can be easily docked with the first steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a first perspective;

[0018] Figure 2 This is a schematic diagram of the third perspective structure of the present invention;

[0019] Figure 3 For this utility model Figure 2 The main view;

[0020] Figure 4 This is a schematic diagram of the internal structure of the hollow cavity of the utility model;

[0021] In the figure: 1. First steel pipe; 2. Second steel pipe; 3. Positioning sleeve; 4. Docking plate; 5. Positioning shaft; 6. Support rod; 7. Positioning plate; 8. Limit rod; 9. Positioning seat; 10. Positioning block; 11. Screw; 12. Guide rod; 13. Ball. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 The utility model is a pre-fixed cold-drawn precision welded steel pipe, comprising a first steel pipe 1 and a second steel pipe 2. Two positioning sleeves 3 are symmetrically arranged on the first steel pipe 1, and docking plates 4 are fixedly arranged at both ends of the positioning sleeve 3. A positioning shaft 5 is rotatably arranged on one side of the docking plate 4, and a support rod 6 is fixedly arranged on the outer end of the positioning shaft 5. The bottom of the support rod 6 is provided with a first through hole, and a positioning plate 7 is fixedly arranged on the middle part of the docking plate 4. A second through hole is provided on the positioning plate 7. Limit rods 8 passing through the first through hole and the second through hole are also provided on both sides of the positioning sleeve 3. A positioning seat 9 is provided at one end of the support rod 6 away from the first through hole. A positioning block 10 for lifting the second steel pipe 2 is provided on the positioning seat 9. A screw 11 passing through the positioning seat 9 is provided at the lower end of the positioning block 10. The screw 11 is threadedly connected to the positioning seat 9, and the top of the screw 11 is rotatably connected to the positioning block 10.

[0024] In this embodiment, the first steel pipe 1 and the second steel pipe 2 can be used in the boiler system to transport liquid materials used in the boiler system. First, move the two support rods 6 under the positioning sleeve 3, and then take the limit rod 8, and pass the limit rod 8 through the first through hole and the second through hole in sequence. At this time, the two support rods 6 at the bottom of the positioning sleeve 3 are fixed, and then take the second steel pipe 2 to be docked, and place the second steel pipe 2 on the two positioning blocks 10. Turn the screw 11, and the positioning block 10 can be raised or lowered through the action of the threaded structure, so that the docking flanges on the first steel pipe 1 and the second steel pipe 2 are on the same horizontal plane. On, further move the two support rods 6 at the top of the positioning sleeve 3, then fix the two support rods 6 at the top of the positioning sleeve 3, and finally adjust the two positioning blocks 10 above the second steel pipe 2 so that multiple positioning blocks 10 all contact the outer wall of the second steel pipe 2. At this time, loosen the second steel pipe 2. The second steel pipe 2 can be limited by the multiple support rods 6 and positioning blocks 10. The docking flange on the second steel pipe 2 and the docking flange on the first steel pipe 1 will not be misaligned. When operating the bolts on the flange plate, there is no need to manually support the docking point of the first steel pipe 1 and the second steel pipe 2, which can facilitate the docking of the first steel pipe 1 and the second steel pipe 2.

[0025] In addition, the positions of multiple positioning blocks 10 can be temporarily adjusted, so that multiple positioning blocks 10 can conveniently limit the second steel pipes 2 of different diameters, and can also facilitate the docking of second steel pipes 2 of different diameters with the first steel pipe 1. In this structure, the support rod 6 and the positioning block 10 can be made of aluminum alloy.

[0026] In this embodiment, the two butt joint plates 4 are butt jointed by bolts, and the bolt fixing method can facilitate the butt jointing of the two butt joint plates 4 .

[0027] Furthermore, the limiting rod 8 is threadedly connected to the first through hole. The threaded connection method can make the limiting rod 8 more firmly installed and improve the stability of the support rod 6 when in use.

[0028] In this embodiment, a cavity is provided on the positioning seat 9, and a guide rod 12 is provided at the lower end of the positioning block 10 which is inserted into the cavity. When the positioning block 10 is raised or lowered, the guide rod 12 will rise or fall in the cavity, thereby providing a guiding structure between the positioning block 10 and the positioning seat 9, thereby improving the stability of the positioning block 10 during lifting or lowering.

[0029] In this embodiment, the inner side of the positioning block 10 is provided with an inclined surface that contacts the outer wall of the second steel pipe 2, and the inclined surface is provided with a plurality of balls 13 that contact the outer wall of the second steel pipe 2. When the outer wall of the second steel pipe 2 contacts the balls 13, it can slide on the inclined surface of the positioning block 10, making it convenient for the docking flanges on the first steel pipe 1 and the second steel pipe 2 to contact each other, thereby facilitating the docking of the first steel pipe 1 and the second steel pipe 2.

[0030] In the description herein, it should be noted that relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprise," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although the 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 these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pre-fixed cold-drawn precision welded steel pipe, comprising a first steel pipe (1) and a second steel pipe (2), characterized in that: Two positioning sleeves (3) are symmetrically arranged on the first steel pipe (1), and docking plates (4) are fixedly arranged at both ends of the positioning sleeve (3). A positioning shaft (5) is rotatably arranged on one side of the docking plate (4), and a support rod (6) is fixedly arranged on the outer end of the positioning shaft (5). A first through hole is provided at the bottom of the support rod (6), and a positioning plate (7) is fixedly arranged in the middle part of the docking plate (4). A second through hole is provided on the positioning plate (7). Limiting rods (8) passing through the first through hole and the second through hole are also provided on both sides of the positioning sleeve (3). A positioning seat (9) is provided at one end of the support rod (6) away from the first through hole. A positioning block (10) for lifting the second steel pipe (2) is provided on the positioning seat (9), and a screw (11) passing through the positioning seat (9) is provided at the lower end of the positioning block (10). The screw (11) is threadedly connected to the positioning seat (9), and the top of the screw (11) is rotatably connected to the positioning block (10).

2. The pre-fixed cold-drawn precision welded steel pipe according to claim 1, characterized in that: The two butt joint plates (4) are butt jointed by bolts.

3. The pre-fixed cold-drawn precision welded steel pipe according to claim 2, characterized in that: The limiting rod (8) is threadedly connected to the first through hole.

4. The pre-fixed cold-drawn precision welded steel pipe according to claim 3, characterized in that: A cavity is provided on the positioning seat (9), and a guide rod (12) is provided at the lower end of the positioning block (10) and is inserted into the cavity.

5. The pre-fixed cold-drawn precision welded steel pipe according to claim 4, characterized in that: The inner side of the positioning block (10) is provided with an inclined surface that contacts the outer wall of the second steel pipe (2).

6. The pre-fixed cold-drawn precision welded steel pipe according to claim 5, characterized in that: The inclined surface is provided with a plurality of rolling balls (13) contacting the outer wall of the second steel pipe (2).

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