High-pressure hubbed flange welded junction positioning tool

Abstract

The utility model provides a high-pressure hubbed flange welded junction positioning tool. The high-pressure hubbed flange welded junction positioning tool comprises an upper positioning rod, a lower positioning seat and a supporting rod, the supporting rod is fixedly connected between the upper positioning rod and the lower positioning seat; one end of the upper positioning rod is vertically arranged at the top end of the supporting rod; and the lower positioning seat is arranged at the bottom of the supporting rod. The problems that a hubbed welding neck flange is large in size, heavy in weight and difficult to install and position, a pipeline is too long and cannot be vertically welded, the welding quality is not qualified due to hand shaking during point opening fixing, the large-batch welding operation efficiency is low and the like can be solved, meanwhile, the welding neck flange is suitable for welding steel pipes with different pipe diameters and flanges, manufacturing is easy, operation is convenient, and cost is low. A lot of time and energy of welders are saved, and welding quality and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the field of assembly tools, in particular to a high-pressure neck flange weld positioning butt joint tool. Background Art

[0002] Compared with flanges, neck flanges have the advantages of high connection reliability, good sealing and connection stability. They are suitable for harsh working conditions with large temperature fluctuations or large pressure fluctuations. They are also suitable for working conditions with high sealing requirements, such as high pressure, low pressure, high temperature, low temperature, expensive media, flammable and explosive media or toxic media.

[0003] However, in the daily connection and assembly of high-pressure neck flanges, it is usually difficult to install and position the neck flanges due to their large size and heavy weight. Summary of the invention

[0004] The utility model provides a high-pressure neck flange weld positioning tool, which aims to solve the technical problem of difficult positioning of the neck flange during assembly in the prior art.

[0005] The utility model provides a high-pressure neck flange weld positioning tool, comprising an upper positioning rod, a lower positioning seat and a support rod; the support rod is fixedly connected between the upper positioning rod and the lower positioning seat; one end of the upper positioning rod is vertically arranged at the top end of the support rod; the lower positioning seat is arranged at the bottom of the support rod.

[0006] Further optimization is that the support rod is a telescopic support rod; it includes a sleeve and a threaded rod inserted in the sleeve; an adjusting nut is axially clamped on the sleeve; the adjusting nut is screwed to the threaded rod; a limiting mechanism is also provided between the sleeve and the threaded rod to prevent the relative rotation between the two, the top of the threaded rod is connected to one end of the upper positioning rod, and the bottom of the sleeve is connected to the lower positioning seat.

[0007] Further optimization is that the limiting mechanism includes a limiting groove axially opened on the threaded rod and a limiting pin installed on the sleeve; the limiting pin is inserted into the limiting groove; the limiting groove radially penetrates the threaded rod; the limiting pin transversely penetrates the side wall of the sleeve and is locked on the sleeve through a limiting nut.

[0008] Further optimization is that the outer wall of the adjusting nut is provided with a convex ring along the circumferential direction; the outer side wall of the sleeve is provided with a retaining plate; the retaining plate is provided with a groove adapted to the width of the convex ring, the convex ring is clamped in the groove and the convex ring is rotatably connected to the groove; the retaining plate is welded to the side wall of the sleeve along the axial direction; there are two retaining plates, which are symmetrically distributed on the side wall of the sleeve up and down.

[0009] Further optimization is that a plurality of support structures are fixedly connected to the bottom of the support rod; the support structures are arranged in a radial annular array along the support rod.

[0010] Further optimization is that the support structure is a right-angled triangle support plate; the first right-angled side of the right-angled triangle support plate is fixedly connected to the support rod; the second right-angled side of the right-angled triangle support plate is fixedly connected to the upper surface of the lower positioning seat.

[0011] Beneficial effects of the present invention:

[0012] The utility model provides a high-pressure neck flange weld positioning tool. Compared with the prior art, the present invention can overcome the problems of large size and heavy weight of neck butt-welded flanges, difficulty in installation and positioning, the inability to vertically weld the pipeline due to excessive length, poor welding quality due to hand shaking when fixing the point mouth, and low efficiency of large-scale welding operations. The utility model is suitable for welding steel pipes and flanges of different diameters, is simple to make, easy to operate, saves welders a lot of time and energy, and improves welding quality and efficiency.

[0013] The utility model provides a high-pressure neck flange welding position positioning tool. The support rod can be subjected to tension and pressure, and the function of stepless length adjustment is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of a high-pressure neck flange weld positioning tool is provided for the utility model;

[0015] Figure 2 A schematic diagram of the flange structure of a high-pressure neck flange weld positioning tool is provided for the utility model;

[0016] Among them, 1-upper positioning rod, 2-lower positioning seat, 3-support structure, 4-support rod; 41, sleeve; 42, adjusting nut; 43, threaded tube; 44, convex ring; 45, limiting structure; 451, limiting pin; 452, limiting nut; 453, limiting groove; 46, positioning plate. DETAILED DESCRIPTION

[0017] Embodiment 1:

[0018] This embodiment provides a high-pressure neck flange weld positioning tool, such as Figure 1As shown, it includes an upper positioning rod 1, a lower positioning seat 2, a support structure 3 and a support rod 4; the lower positioning seat 2 is used to be fixed inside the pipeline, and the lower positioning seat 2 is a rigid flat plate; the support rod 4 is used to connect the lower positioning seat 2 and the upper positioning rod 1; the upper positioning rod extends in the direction of the neck flange to be installed; the length of the support rod 2 is selected according to the inner diameter of the pipeline to be assembled and the neck flange. Under normal working conditions, the pipeline and the neck flange are standard parts, and the commonly used inner diameter specifications are limited, so the support rods of different lengths that need to be prepared are limited; therefore, the support rod 3 can be selected to be welded to the upper positioning rod 1 and the lower positioning seat 2; four support structures 3 arranged in a circular array around the support rod 4 are arranged between the lower positioning seat 2 and the support rod 4, and the support structure 3 is a triangular plate, and one right-angled side of each triangular plate is fixedly connected to the upper surface of the lower positioning seat 2, and the other right-angled side of the triangular plate is fixedly connected to the contact surface of the support rod.

[0019] The working process of this embodiment is to select a tool that matches the inner diameter of the pipeline and put it into the pipeline, so that the upper positioning rod 1 extends out of the pipeline mouth, and the length of the support rod 4 and the sum of the thickness of the upper positioning rod 1 and the lower positioning seat 2 match the inner diameter of the pipeline, so that the upper positioning rod 1 and the lower positioning seat 2 are in contact and fixed with the inner wall of the pipeline; place the neck flange with the drawn lines on the tool for matching and spot welding, and then proceed to the next step of welding.

[0020] Embodiment 2:

[0021] The present embodiment provides a high-pressure neck flange weld positioning tool. The difference between the present embodiment and the embodiment 1 is that the support rod 4 of the present embodiment is a stepless adjustable telescopic support rod, including a sleeve 41 and a threaded rod 43 inserted in the sleeve 41, an adjusting nut 42 is axially clamped on the sleeve 41, and the adjusting nut 42 is screwed with the threaded rod 43. A limiting mechanism 45 is also provided between the sleeve 41 and the threaded rod 43 to prevent the relative rotation of the two. The limiting mechanism 45 includes a limiting groove 453 axially opened on the threaded rod 43 and a limiting pin 451 installed on the sleeve 41, and the limiting pin 451 is inserted into the limiting groove 453. In order to enhance the strength of the limiting effect, the limiting groove 453 penetrates the threaded rod 43 in the radial direction, and the limiting pin 451 penetrates the side wall of the sleeve 41 transversely and is locked on the sleeve 41 through the limiting nut 452. The stroke of the threaded rod 43 is consistent with the axial length of the limiting groove 453. A convex ring 44 is circumferentially provided on the outer wall of the adjusting nut 43 , and a retaining plate 46 is provided on the outer side wall of the sleeve 41 . Two retaining plates 46 are provided and symmetrically distributed on the side wall of the sleeve 41 . The retaining plates 46 are axially welded to the side wall of the sleeve 41 , and the convex ring 44 is retained in the retaining plates 46 .

[0022] The construction process of this embodiment is different from that of embodiment 1 in that the adjusting nut 42 is rotated to extend the threaded rod 43, and the limiting pin 451 is rotated to fix the threaded rod 43 so that the upper positioning rod 1 and the lower positioning seat 2 are in contact with and fixed to the inner wall of the pipeline.

[0023] When the utility model is in use, a high-pressure neck flange welding joint positioning tool is placed at one end of the pipe interior near the pipe mouth, so that the upper positioning rod 1 is exposed from the pipe mouth, and the adjusting nut 42 is rotated to adjust the length of the support rod 4, so that the upper positioning rod 1 and the lower positioning seat 2 are in contact with and fixed to the inner wall of the steel pipe, and then the high-pressure neck flange is hung on the upper positioning rod 1 for butt-jointing and spot welding.

Claims

1. A high-pressure neck flange weld positioning tool, characterized in that: The invention comprises an upper positioning rod (1), a lower positioning seat (2) and a support rod (4); the support rod (4) is fixedly connected between the upper positioning rod (1) and the lower positioning seat (2); one end of the upper positioning rod (1) is vertically arranged at the top end of the support rod (4); the lower positioning seat (2) is arranged at the bottom of the support rod (4); the support rod (4) is a telescopic support rod; it comprises a sleeve (41) and a threaded rod (43) inserted in the sleeve (41); an adjusting nut (42) is axially clamped on the sleeve (41); the adjusting nut (42) is screwed to the threaded rod (43); a limiting mechanism (45) is also arranged between the sleeve (41) and the threaded rod (43) to prevent the two from rotating relative to each other, the top of the threaded rod (43) is connected to one end of the upper positioning rod (1), and the bottom of the sleeve (41) is connected to the lower positioning seat (2).

2. A high-pressure neck flange weld positioning tool according to claim 1, characterized in that: The limiting mechanism (45) comprises a limiting groove (453) axially provided on the threaded rod and a limiting pin (451) mounted on the sleeve (41); the limiting pin (451) is inserted into the limiting groove (453); the limiting groove (453) radially penetrates the threaded rod (43); the limiting pin (451) transversely penetrates the side wall of the sleeve (41) and is locked on the sleeve (41) through a limiting nut (452).

3. A high-pressure neck flange weld positioning tool according to claim 2, characterized in that: The outer wall of the adjusting nut (42) is provided with a convex ring (44) along the circumferential direction; the outer side wall of the sleeve (41) is provided with a retaining plate (46); the retaining plate (46) is provided with a groove adapted to the width of the convex ring (44), the convex ring (44) is retained in the groove and the convex ring (44) is rotatably connected to the groove; the retaining plate (46) is welded to the side wall of the sleeve (41) along the axial direction; two retaining plates (46) are provided, and are symmetrically distributed on the side wall of the sleeve (41) from top to bottom.

4. A high-pressure neck flange weld positioning tool according to claim 1, characterized in that: A plurality of support structures (3) are fixedly connected to the bottom of the support rod (4); the support structures (3) are arranged in a radial annular array along the support rod (4).

5. A high-pressure neck flange weld positioning tool according to claim 4, characterized in that: The support structure (3) is a right-angled triangle support plate; the first right-angled side of the right-angled triangle support plate is fixedly connected to the support rod (4); the second right-angled side of the right-angled triangle support plate is fixedly connected to the upper surface of the lower positioning seat (2).

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