Quick positioning device for flange installation of water-power engineering stainless steel pipeline

Abstract

A quick positioning device for flange installation of a hydropower engineering stainless steel pipeline comprises a first semicircular flange, a second semicircular flange and a threaded connecting rod. The two semicircular flanges are perpendicular to the central axis of the pipeline, and corresponding bolt holes are formed in the positions, corresponding to flange bolt holes to be installed in a pipe opening of the pipeline, of the two semicircular flanges. The threaded connecting rods are parallel to the central axis of the pipeline, and the two semicircular flanges are connected into a whole through the threaded connecting rods. The second semicircular flange is arranged close to a pipe orifice of the pipeline, a flange mounting position is reserved at the pipe orifice, and the inner circles of the two semicircular flanges are tightly attached to the outer wall of the pipeline; a bolt hole of a flange to be installed penetrates into a corresponding threaded connecting rod extending out of the second semicircular flange, then is tightly attached to the outer plane of the second semicircular flange, is temporarily fixed to the second semicircular flange through a nut and then is welded to a pipeline. The device can ensure the perpendicularity and concentricity of the flange and the pipeline, can avoid manual repeated adjustment, is convenient and quick to use, and improves the flange mounting quality and efficiency.

Description

Technical fields:

[0001] This utility model relates to the field of hydropower engineering technology, specifically to a quick positioning device for installing stainless steel pipeline flanges in hydropower engineering. Background technology:

[0002] Currently, when installing flanges on auxiliary pipelines of hydropower station units, the flanges are manually lifted and connected to the pipeline openings. The verticality and concentricity of the flanges with respect to the center of the pipeline opening are also manually adjusted. However, for high-pressure pipelines and large-diameter pipelines in the power station auxiliary system, the flanges are heavy and cannot be easily fixed manually. The adjustment is time-consuming and laborious, and it is easy to cause personnel injury, posing a high safety risk. When the flanges are fixed by spot welding, the verticality and concentricity of the flanges change due to welding shrinkage and deformation, and the weld points need to be disconnected and readjusted. Utility model content:

[0003] The purpose of this utility model is to provide a quick positioning device for installing stainless steel pipe flanges in hydropower projects, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model adopts the following technical solution:

[0005] This utility model provides a quick positioning device for installing stainless steel pipe flanges in hydropower engineering. The positioning device is arranged above a horizontally placed pipe and includes a first semi-circular flange, a second semi-circular flange, and threaded connecting rods. The first and second semi-circular flanges are arranged parallel and symmetrically, both perpendicular to the central axis of the pipe. Corresponding bolt holes are provided on both semi-circular flanges at the positions of the flange bolt holes to be installed at the pipe opening. The threaded connecting rods are parallel to the central axis of the pipe and perpendicular to both semi-circular flanges. The two semi-circular flanges are connected as a whole by several threaded connecting rods. The second semi-circular flange is located near the pipe opening, with a pre-reserved flange installation position at the pipe opening. The inner circles of the first and second semi-circular flanges are tightly fitted against the arc-shaped outer wall of the pipe. The bolt holes of the flange to be installed at the pipe opening are inserted into the corresponding threaded connecting rods extending from the second semi-circular flange and then pressed against the outer plane of the second semi-circular flange, temporarily fixed to the second semi-circular flange by nuts.

[0006] The first and second semicircular flanges have the same structure and dimensions.

[0007] The diameters of the first and second semicircular flanges are consistent with those of the flange to be installed at the pipe opening.

[0008] The inner circles of the first and second semicircular flanges match the arc-shaped outer wall of the pipeline.

[0009] The two semicircular flanges are connected by a threaded connecting rod and fixed as a whole by nuts. The nuts are installed on the threaded connecting rod. After the threaded connecting rod passes through the bolt hole of the first semicircular flange, the first semicircular flange and the threaded connecting rod are fixed relative to each other by nuts installed on both sides. On the other side of the threaded connecting rod, it passes through the bolt hole of the second semicircular flange in the same way and is fixed by nuts installed on both sides.

[0010] The bolt holes on the outer side of the second semicircular flange are countersunk holes, with a diameter larger than the outer diameter of the nut and a depth greater than the height of the nut. After the nut is installed on the outer side of the second semicircular flange, it is equal to or lower than the outer plane of the second semicircular flange.

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

[0012] When using this invention, two semi-circular flanges are placed on the pipeline, and their positions are adjusted so that the second semi-circular flange is close to the pipe opening, leaving space for flange installation. The flange to be installed at the pipe opening is directly pressed against the second semi-circular flange and temporarily fixed with nuts. It is then welded to the pipe opening, ensuring the flange's verticality and concentricity. This avoids repeated manual adjustments and allows for precise adjustments during use, making it convenient and quick. Therefore, this invention can position flanges, facilitating connection work and changing the traditional method of manually fixing flanges. It avoids the problem of flanges being non-vertical or non-concentric, thus improving the installation quality and efficiency of pipeline flanges. Attached image description:

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the structure of the second semicircular flange of this utility model.

[0016] The attached diagram is labeled as follows: 1-pipeline; 2-flange; 3-first semi-circular flange; 4-second semi-circular flange; 5-threaded connecting rod; 6-nut. Detailed implementation method:

[0017] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principle of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the protection scope of the present invention.

[0018] See Figures 1-3This utility model provides a quick positioning device for installing stainless steel pipe flanges in hydropower engineering. In use, it is positioned above a horizontally placed pipe 1. The positioning device includes a first semi-circular flange 3, a second semi-circular flange 4, a threaded connecting rod 5, and a nut 6. The first semi-circular flange 3 and the second semi-circular flange 4 are arranged parallel and symmetrically, both perpendicular to the central axis of the pipe 1. Corresponding bolt holes are provided on both semi-circular flanges at the bolt hole positions of the flange 2 to be installed at the pipe opening of the pipe 1. In this embodiment, the structure and dimensions of the first semi-circular flange 3 and the second semi-circular flange 4 are identical, and their diameters match those of the flange 2 to be installed at the pipe opening of the pipe 1. The second semi-circular flange 4 is positioned near the pipe opening of the pipe 1, with a reserved installation position for the flange 2 at the pipe opening. The inner circles of the first semi-circular flange 3 and the second semi-circular flange 4 match the arc-shaped outer wall of the pipe 1. The threaded connecting rod 5 is arranged parallel to the central axis of the pipeline 1 and perpendicular to both semicircular flanges. The two semicircular flanges are connected by several parallel threaded connecting rods 5 and fixed as a whole by nuts 6. Nuts 6 are installed on the threaded connecting rods 5. After the threaded connecting rods 5 pass through the bolt holes of the first semicircular flange 3, the first semicircular flange 3 and the threaded connecting rod 5 are fixed relative to each other by nuts 6 installed on both sides. On the other side of the threaded connecting rod 5, it passes through the bolt holes of the second semicircular flange 4 in the same way and is fixed by nuts 6 installed on both sides. The bolt holes on the outer side of the second semicircular flange 4 are countersunk holes with a diameter larger than the outer diameter of the nuts 6 to facilitate tightening of the nuts 6. The hole depth is greater than the height of the nuts 6. Nuts 6 are installed on both sides of the second semicircular flange 4 to complete the fixation, ensuring that the nuts 6 on the outer side of the second semicircular flange 4 do not exceed the outer plane of the second semicircular flange 4. The first semicircular flange 3, the second semicircular flange 4, the threaded connecting rods 5, and the nuts 6 are all made of ordinary steel. The threaded connecting rods 5 have conventional threads. All materials involved in this utility model are conventional and can be processed.

[0019] The positioning device is placed above pipeline 1. The inner circles of the first semicircular flange 3 and the second semicircular flange 4 fit tightly against the arc-shaped outer wall of pipeline 1. The position is adjusted so that the second semicircular flange 4 is close to the pipe opening of pipeline 1. The installation position of flange 2 of pipeline 1 is reserved. When installing flange 2, the bolt holes on flange 2 are directly aligned with the threaded connecting rod 5 protruding from the second semicircular flange 4. After insertion, it is pressed against the outer plane of the second semicircular flange 4. The perpendicularity of flange 2 and its concentricity with pipeline 1 are checked. Flange 2 is temporarily fixed to the second semicircular flange 4 with nut 6. Then flange 2 is welded to pipeline 1 to achieve rapid positioning and installation of flange 2 at the pipe opening of pipeline 1, while ensuring the perpendicularity and concentricity of flange 2 with pipeline 1.

Claims

1. A quick positioning device for installing stainless steel pipe flanges in hydropower projects, arranged above a horizontally placed pipe (1), characterized in that: The positioning device includes a first semicircular flange (3), a second semicircular flange (4), and a threaded connecting rod (5). The first semicircular flange (3) and the second semicircular flange (4) are arranged in parallel and symmetrically. Both semicircular flanges are perpendicular to the central axis of the pipeline (1). The two semicircular flanges have corresponding and matching bolt holes at the bolt hole positions of the flange (2) to be installed at the pipe opening of the pipeline (1). The threaded connecting rod (5) is arranged parallel to the central axis of the pipeline (1) and perpendicular to both semicircular flanges. Several threads are used to connect the two semicircular flanges. The threaded connecting rod (5) is connected as a whole; the second semi-circular flange (4) is set at the pipe opening near the pipe (1), and the pipe opening of the pipe (1) is reserved for the installation position of the flange (2). The inner circles of the first semi-circular flange (3) and the second semi-circular flange (4) are tightly attached to the arc-shaped outer wall of the pipe (1); the bolt hole of the flange (2) to be installed is inserted into the corresponding threaded connecting rod (5) extending from the second semi-circular flange (4) and then attached to the outer plane of the second semi-circular flange (4), and temporarily fixed on the second semi-circular flange (4) by the nut (6).

2. The quick positioning device for installing stainless steel pipeline flanges in hydropower projects according to claim 1, characterized in that: The first semicircular flange (3) and the second semicircular flange (4) have the same structure and size.

3. The quick positioning device for installing stainless steel pipeline flanges in hydropower projects according to claim 1, characterized in that: The diameters of the first semicircular flange (3) and the second semicircular flange (4) are the same as those of the flange (2) to be installed at the pipe opening of the pipeline (1).

4. The quick positioning device for installing stainless steel pipeline flanges in hydropower projects according to claim 1, characterized in that: The inner circles of the first semicircular flange (3) and the second semicircular flange (4) match the arc-shaped outer wall of the pipeline (1).

5. The quick positioning device for installing stainless steel pipeline flanges in hydropower projects according to claim 1, characterized in that: The two semicircular flanges are connected by a threaded connecting rod (5) and fixed as a whole by nuts (6). Nuts (6) are installed on the threaded connecting rod (5). After the threaded connecting rod (5) passes through the bolt hole of the first semicircular flange (3), the first semicircular flange (3) and the threaded connecting rod (5) are fixed relative to each other by nuts (6) installed on both sides. On the other side of the threaded connecting rod (5), it passes through the bolt hole of the second semicircular flange (4) in the same way and is fixed by nuts (6) installed on both sides.

6. The quick positioning device for installing stainless steel pipeline flanges in hydropower projects according to claim 1, characterized in that: The bolt holes on the outer side of the second semicircular flange (4) are countersunk holes with a diameter greater than the outer diameter of the nut (6) and a depth greater than the height of the nut (6). After the nut (6) on the outer side of the second semicircular flange (4) is installed, it is equal to or lower than the outer plane of the second semicircular flange (4).

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