Device for detecting straightness of steel pipe

Abstract

The utility model relates to the technical field of building construction equipment maintenance, in particular to a device for detecting straightness of a steel pipe. Comprising an end position base used for supporting the end of a steel pipe and a middle position base used for supporting the middle of the steel pipe, leveling devices are arranged at the lower end of the end position base and the lower end of the middle position base correspondingly, an edge position jacking and a cross sight bead are installed at the upper end of the end position base through a telescopic stand column, and the edge position jacking is of a V-shaped groove-shaped structure with an upward opening; the cross sight bead is fixedly installed on the central axis of the side position jacking. The upper end of the middle base is provided with a middle top support and a bidirectional laser emitter through a supporting rod, the middle top support is of a V-shaped groove-shaped structure with an upward opening, and the bidirectional laser emitter is fixedly installed on the central axis of the middle top support. The device is simple in structure, convenient to use and high in inspection precision, can be conveniently moved to a construction site to inspect the straightness of the steel pipe, greatly saves the time and manpower for inspecting the steel pipe, and reduces the quality risk in the construction process.

Description

Technical Field

[0001] This utility model relates to the technical field of maintenance and upkeep of construction equipment, specifically a device for inspecting the straightness of steel pipes. Background Technology

[0002] Steel pipes are commonly used in engineering construction for railings, stair handrails, and security grilles. During installation, the straightness and alignment of the pipes are critical. The outer surface of the steel pipes often needs to be painted during construction. Sandblasting is required before painting to facilitate paint adhesion, but this sandblasting process can easily cause the pipes to deform or become misaligned. Ultimately, this results in a loose connection between the pipes and the contact members during installation, affecting the aesthetics and safety of the railings. Therefore, the straightness of the pipes is an important indicator for evaluating construction quality. Chinese Patent 2024214891585 discloses a "Precision Welded Cold-Drawn Steel Pipe Diameter Linearity Inspection Device" (Authorization Announcement No.: CN222784087U). This device includes a support plate, a rotary drive mechanism, and a pipe body inspection mechanism. The pipe body inspection mechanism includes two fixed plates and a guide rod. The guide rod is positioned between the two fixed plates to connect them. Two inspection pressure plates pass through the guide rod, allowing the inspection pressure plates to move axially along the guide rod. The two fixed plates are connected to the two inspection pressure plates via telescopic units, enabling the two inspection pressure plates to open and close. One of the inspection pressure plates has a detection unit for detecting the distance between the inspection pressure plates. This device has a complex structure, is inconvenient to move, and can only be used as a product quality inspection tool in fixed locations such as production workshops. It cannot be moved to construction sites anytime and anywhere to inspect the straightness of steel pipes. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a device for inspecting the straightness of steel pipes that is simple in structure, easy to use, has high inspection accuracy, and can be easily moved to the construction site.

[0004] The technical solution adopted by this utility model to solve the technical problem is:

[0005] The device for inspecting the straightness of steel pipes according to this utility model includes an end base for supporting the end of the steel pipe and a middle base for supporting the middle of the steel pipe. A leveling device is provided at the lower end of both the end base and the middle base. A side support and a crosshair are installed at the upper end of the end base via a telescopic column. The side support is a V-shaped groove structure with an upward opening, and the crosshair is fixedly installed on the central axis of the side support. A middle support and a bidirectional laser emitter are installed at the upper end of the middle base via a support rod. The middle support is a V-shaped groove structure with an upward opening, and the bidirectional laser emitter is fixedly installed on the central axis of the middle support.

[0006] This solution provides a device with a simple structure, convenient use, high inspection accuracy, and the ability to be easily moved to the construction site to inspect the straightness of steel pipes.

[0007] Preferably, the leveling device includes a platform fixedly connected to the lower end of a telescopic column or support rod, a level embedded in the upper surface of the platform, and telescopic support legs set on the lower surface of the platform.

[0008] This solution ensures that the equipment installed on site remains horizontal.

[0009] Preferably, the level is a bubble level.

[0010] This solution results in a device with a simple structure and low production cost.

[0011] The telescopic support includes an internally threaded sleeve fixedly connected to the bottom of the platform, a screw rod threadedly installed in the internally threaded sleeve, and a base plate fixedly connected to the lower end of the screw rod.

[0012] This solution features a simple telescopic support structure that allows for easy height adjustment, thereby enhancing the platform's levelness.

[0013] Preferably, the telescopic column includes a column sleeve with internal threads and a column screw installed in the column sleeve by threads. The telescopic column is arranged longitudinally, and one of the column sleeve and the column screw is connected to a side support, while the other is connected to a leveling device.

[0014] This design features a simple telescopic column structure that is easy to adjust in height.

[0015] Preferably, a bearing seat is fixedly connected to the lower end of the side support, a bearing is installed inside the bearing seat, and the bearing is fitted onto the upper end of the telescopic column.

[0016] This solution allows for easy adjustment of the height of the telescopic column while ensuring that the edge support does not rotate.

[0017] Thanks to the above structure, the device is simple in structure, easy to use, and has high inspection accuracy. It can also be easily moved to the construction site to inspect the straightness of steel pipes, saving a lot of time and manpower for steel pipe inspection and reducing quality risks during construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an end base according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the central base.

[0020] Figure 3 for Figure 1A magnified view of part A in the middle.

[0021] Figure 4 This is a schematic diagram of the structure in use. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1 , Figure 2 As shown, the device for inspecting the straightness of a steel pipe according to this utility model includes an end base for supporting the end of the steel pipe and a middle base for supporting the middle of the steel pipe. A leveling device is provided at the lower end of both the end base and the middle base. Figure 1 As shown, the upper end of the end base is equipped with a side support 1 and a crosshair 2 via a telescopic column. The side support 1 is a V-shaped groove structure with an upward opening. The crosshair 2 is fixedly installed on the central axis of the side support 1. The crosshair 2 is a triangular prism structure that fits the V-shaped groove structure of the side support 1 and can be precisely locked into the bottom of the V-shaped groove structure. The two ends of the crosshair 2 have cross-shaped engravings for use as a sight. The telescopic column includes a column sleeve 8 with internal threads and a column screw 81 threadedly installed in the column sleeve 8. The telescopic column is arranged longitudinally, and one of the column sleeve 8 and the column screw 81 is connected to the side support 1, while the other is connected to a leveling device. In this embodiment, the column sleeve 8 is located at the lower end and connected to the leveling device, while the column screw 81 is located at the upper end and connected to the side support 1. Of course, as another embodiment of this utility model, the column sleeve 8 can be set at the upper end to connect to the side support 1, and the column screw 81 can be set at the lower end to connect to the leveling device.

[0024] As a further improvement of this utility model, a bearing seat 11 is fixedly connected to the lower end of the side support 1, and a bearing 12 is installed inside the bearing seat 11. The bearing 12 is fitted onto the upper end of the telescopic column. The bearing seat 11 is a disc-shaped structure with a folded edge. The bearing 12 is installed in the bearing seat 11, with the outer ring of the bearing seat 11 engaging the folded edge, and the inner ring fitting onto the protrusion at the upper end of the telescopic column. In this way, when the telescopic column is rotated to adjust the height, the support 1 does not rotate with it, making operation convenient.

[0025] like Figure 2As shown, a central support 3 and a bidirectional laser emitter 4 are mounted on the upper end of the central base via a support rod 31. The central support 3 is a V-shaped groove structure with an upward opening. The bidirectional laser emitter 4 is fixedly installed on the central axis of the central support 3. The outer shell of the bidirectional laser emitter 4 is a triangular prism structure, adapted to the V-shaped groove structure of the central support 3, and can be precisely locked into the bottom of the V-shaped groove structure. A laser emitting head is provided at each end of the bidirectional laser emitter 4, which can emit horizontal laser beams to both sides, and the laser beams in both directions are on the same straight line.

[0026] like Figure 1 As shown, the leveling device includes a platform 5 fixedly connected to the lower end of a telescopic column or support rod, a level 6 embedded in the upper surface of the platform 5, and telescopic support legs 7 set on the lower surface of the platform 5. The level 6 is a bubble level. The platform 5 is a square plate structure, with the telescopic column or support rod fixedly connected to the center of the platform 5. The four telescopic support legs 7 are distributed at the four corners of the lower surface of the platform 5. The level 6 is set at a suitable position on the upper surface of the platform 5 as needed to detect the levelness of the platform 5. Adjusting the four telescopic support legs 7 under the platform 5 can change the levelness of the platform 5 until it is consistent with the horizontal plane.

[0027] like Figure 2 As shown, the telescopic support leg 7 includes an internally threaded sleeve 71 fixedly connected to the bottom of the platform 5, a screw 72 threadedly installed in the internally threaded sleeve 71, and a base plate 73 fixedly connected to the lower end of the screw 72. The base plate 73 has a disc-shaped structure with a large contact area with the ground, which helps maintain stability. Rotating the base plate 73 and the screw 72 can change the height of the telescopic support leg 7. By adjusting the height of the telescopic support legs 7 at different positions under the platform 5, the levelness of the platform 5 can be adjusted.

[0028] like Figure 4 As shown, in use, the two end bases and one mid-position base together constitute a set of testing equipment. Figure 4 The end base view and the middle base view are respectively Figure 1 and Figure 2A view rotated 90 degrees horizontally. Based on the length of the steel pipe 9 to be tested, place two end bases at both ends of the pipe 9, and a middle base in the middle, with the end and middle bases aligned on the same straight line. First, adjust the leveling devices at the bottom of the end and middle bases to ensure they are horizontal. Turn on the bidirectional laser emitter 4 on the middle base, which emits two laser beams towards the end bases on both sides. Adjust the height of the telescopic columns on the end bases so that the laser beams fall precisely on the crosshair 2. At this point, the edge support 1 on the end base and the middle support 3 on the middle base are aligned on the same straight line. Place the steel pipe to be tested on the crosshairs. If both ends and the middle position fit well with the edge support 1 and the middle support 3, the steel pipe has good straightness and can be used for construction. Otherwise, the straightness is poor and it cannot be used for construction.

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

Claims

1. An apparatus for inspecting the straightness of a steel pipe, comprising an end base for supporting an end portion of the steel pipe, a middle base for supporting a middle portion of the steel pipe, and leveling devices provided at lower ends of the end base and the middle base, characterized in that: The upper end of the end base is provided with a side top support (1) and a crosshair (2) through a telescopic column, the side top support (1) is a V-shaped groove structure with an upward opening, and the crosshair (2) is fixedly installed on the central axis of the side top support (1); the upper end of the middle base is provided with a middle top support (3) and a bidirectional laser emitter (4) through a support rod, the middle top support (3) is a V-shaped groove structure with an upward opening, and the bidirectional laser emitter (4) is fixedly installed on the central axis of the middle top support (3).

2. An apparatus for testing the straightness of a steel pipe according to claim 1, wherein: The leveling device comprises a platform (5) fixedly connected to the lower end of the telescopic column or the support rod, a level (6) embedded on the upper surface of the platform (5), and a telescopic foot (7) arranged on the lower surface of the platform (5).

3. An apparatus for testing the straightness of a steel pipe according to claim 2, wherein: The level (6) is a bubble level.

4. An apparatus for testing the straightness of a steel pipe according to claim 2, wherein: The telescopic foot (7) comprises an inner threaded sleeve (71) fixedly connected to the lower surface of the platform (5), a screw rod (72) threadedly installed in the inner threaded sleeve (71), and a bottom support plate (73) fixedly connected to the lower end of the screw rod (72).

5. An apparatus for testing the straightness of a steel pipe according to claim 1 or 2, wherein: The telescopic column comprises a threaded column sleeve (8) and a column screw rod (81) threadedly installed in the threaded column sleeve (8), one of the threaded column sleeve (8) and the column screw rod (81) is connected to the side top support (1), and the other is connected to the leveling device.

6. An apparatus for testing the straightness of a steel pipe according to claim 5, wherein: The lower end of the side top support (1) is fixedly connected with a bearing seat (11), the bearing seat (11) is internally provided with a bearing (12), and the bearing (12) is sleeved on the upper end of the telescopic column.

Images