Center line surveying and mapping device for small-caliber drainage pipeline

Abstract

The utility model provides a small-caliber drainage pipeline center line surveying and mapping device, and belongs to the technical field of pipeline surveying and mapping tools. The device comprises a supporting disc, one side of the supporting disc is connected with arc-shaped arms, and the arc-shaped arms are jointly meshed with a gear; the device further comprises a holding cylinder, the holding cylinder is fixed to the other side of the supporting disc, a driving rod is connected into the holding cylinder, the driving rod is connected with the gear and drives the gear to rotate so as to drive the arc-shaped arm to stretch or retract, and the other end of the driving rod extends out of the holding cylinder. The device further comprises a calibration disc, the calibration disc is arranged on the driving rod in a sleeving mode, an insertion hole is formed in the calibration disc, a surveying and mapping support is inserted into the insertion hole, and a drawing pen used for drawing a center line is connected to the surveying and mapping support. According to the design, the axis of the driving rod coincides with the center position of the pipeline through three-point self-centering, then the surveying and mapping support is arranged over the driving rod, the surveying and mapping support is moved, the center line can be drawn out, and therefore surveying and mapping of the center line of the pipeline are completed, and compared with original ruler and pen surveying and mapping, the surveying and mapping efficiency and accuracy are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline surveying tools, and in particular to a device for surveying the centerline of small-diameter drainage pipelines. Background Technology

[0002] Small-diameter drainage pipes are typically used to collect and discharge domestic sewage and rainwater. They are responsible for transporting sewage and rainwater from the source to sewage treatment plants or natural water bodies. Due to their flexible installation and low cost, small-diameter pipes are widely used in drainage systems in residential areas, commercial areas, and other regions.

[0003] When laying out small-diameter drainage pipes, drawing center lines helps construction workers better understand and manage the pipe routing, control the laying accuracy, reduce errors, and ensure smooth construction. Traditional measurement methods typically rely on manual measurement using tools such as rulers. This method has many inconveniences and limitations; manual measurement is time-consuming, inefficient, and has limited accuracy, easily affected by subjective factors and environmental conditions, leading to inaccurate results. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a device for surveying the centerline of small-diameter drainage pipes.

[0005] The technical solution to the technical problem solved by this utility model is as follows:

[0006] This technical solution proposes a centerline mapping device for small-diameter drainage pipes, including a support plate with at least three rotatable arc-shaped arms connected to one side of the support plate. A gear is meshed at the center of each arc-shaped arm. A gripping cylinder is fixed to the other side of the support plate, and a rotatable drive rod is connected inside the gripping cylinder. One end of the drive rod is connected to the gear, and rotating the drive rod drives the gear to rotate, thereby opening or closing the arc-shaped arms. The other end of the drive rod extends outside the gripping cylinder. A calibration plate is rotatably mounted on the drive rod, and an insertion hole is provided on the calibration plate. A mapping bracket is inserted into the insertion hole, and a drawing pen is detachably connected to the mapping bracket. The drawing pen is perpendicular to the drive rod.

[0007] Preferably, the surveying bracket includes a plug rod that is adapted to be inserted into a socket. A vertical rod is connected above the plug rod, and a horizontal rod extending to the left is connected to the top of the vertical rod. A circular buckle for fixing a drawing pen is connected to the end of the horizontal rod.

[0008] Preferably, an inner cylinder is fixedly connected to the support plate, the inner cylinder is placed inside the grip cylinder, and a cavity is left between the inner cylinder and the grip cylinder. The cavity is connected to the insertion hole for the surveying support to move. At least one set of rotating bearings are connected between the inner cylinder and the drive rod.

[0009] Preferably, a damping bearing is connected to one side of the inner cylinder and the calibration plate.

[0010] Preferably, the arc-shaped arm includes an interconnected arc-shaped toothed portion and an arc-shaped support portion. The arc-shaped toothed portion is connected to the support disk via a rotating shaft. The arc-shaped toothed portion meshes with a gear to control the opening and closing of the arc-shaped arm. The arc-shaped support portion has an arc-shaped profile that matches the inner wall of the pipe and a receiving cavity for accommodating adjacent arc-shaped arms.

[0011] Preferably, the end of the drive rod has a polygonal structure.

[0012] Preferably, the calibration disk is made of metal and a level tube is magnetically connected to it.

[0013] Preferably, the calibration disk is provided with angle lines along its axis.

[0014] Preferably, the arc-shaped arm has several sets of hollow holes.

[0015] Preferably, the socket is designed with rounded corners.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] 1. This invention achieves high-precision pipeline center positioning through three-point self-centering, aligning the drive rod axis with the pipeline center. Rotating the calibration disc moves the insertion hole directly above the drive rod, and the surveying bracket is inserted into the hole. By linearly sliding the surveying bracket, the pen can draw a straight center line at the top of the pipeline, thus completing the surveying of the pipeline centerline. This design enables rapid surveying, significantly improving efficiency and accuracy compared to traditional ruler-pen surveying.

[0018] 2. In this utility model, the gear connected to the drive rod drives the three sets of arc arms to expand radially at equal intervals, so that they are supported inside the pipe to determine the center position of the pipe, which is quick and convenient; by rotating the drive rod in the opposite direction, the three sets of arc arms can be driven to retract. When retracted to the minimum range, a certain amount of space can be saved, which is convenient for storage or carrying and transfer. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a three-dimensional structural diagram of the front side of this utility model.

[0021] Figure 2 This is a schematic diagram of the rear three-dimensional structure of this utility model.

[0022] Figure 3 This is a half-sectional structural diagram of the present invention.

[0023] Figure 4 This is the left view of this utility model.

[0024] Figure 5 This is a schematic diagram of the arc-shaped arm contracted to its minimum extent.

[0025] Figure 6 This is a three-dimensional structural diagram of the surveying process of this utility model.

[0026] Figure 7 yes Figure 6 A schematic diagram of the half-section structure.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Holder; 2. Support plate; 3. Arc-shaped arm; 31. Arc-shaped toothed part; 32. Arc-shaped support part; 33. Receiving cavity; 34. Hollow hole; 35. Rotating shaft; 4. Gear; 5. Drive rod; 6. Calibration plate; 7. Insertion hole; 8. Surveying bracket; 9. Drawing pen; 10. Circular buckle; 11. Inner cylinder; 12. Cavity; 13. Rotating bearing; 14. Damping bearing; 15. Level tube; 16. Angle line. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] like Figures 1 to 7As shown, this embodiment proposes a centerline mapping device for small-diameter drainage pipes, including a support plate 2. At least three sets of rotatable arc-shaped arms 3 are connected to one side of the support plate 2, and a gear 4 meshes at the center of several arc-shaped arms 3. It also includes a handheld grip 1 for initial positioning, fixed to one side of the support plate 2. A rotatable drive rod 5 is connected inside the grip 1. The end of the drive rod 5 has a polygonal structure to facilitate better force distribution when manually rotating the drive rod 5. One end of the drive rod 5 is connected to the gear 4. Rotating the drive rod 5 drives the gear 4 to rotate, thereby causing the arc-shaped arms 3 to open or retract. The other end of the drive rod 5 extends outside the grip 1. It also includes a calibration plate 6, rotatably mounted on the drive rod 5. The calibration plate 6 has an insertion hole 7, into which a mapping bracket 8 is fitted. A drawing pen 9 is detachably connected to the mapping bracket 8. The drawing pen 9 is perpendicular to the drive rod 5 and has rounded corners at the insertion hole 7 to facilitate quick and accurate insertion of the mapping bracket 8 into the insertion hole 7.

[0033] like Figure 6 As shown, this device achieves high-precision pipeline center positioning through three-point self-centering. The operator holds the cylinder 1 with one hand and inserts the arc-shaped arm 3 into the pipeline to be measured, while rotating the drive rod 5 with the other hand. At this time, a synchronous transmission mechanism is triggered between the drive rod 5, gear 4, and arc-shaped arm 3, causing the three arc-shaped arms 3 to expand radially at equal intervals in cooperation with gear 4, until the side ends of the three sets of arc-shaped arms 3 form stable contact with the inner wall of the pipeline. Based on the principle of three-point circular alignment, the axis of the drive rod 5 coincides with the center line of the pipeline. Next, in the calibration stage, the operator rotates the insertion hole 7 in the calibration disk 6 to directly above the drive rod 5, inserts the mapping bracket 8 into the insertion hole 7, and uses the linear sliding mapping bracket 8 to draw a straight center line at the top of the pipeline with the drawing pen 9, thus completing the pipeline measurement. This design enables rapid mapping within the pipeline, significantly improving mapping efficiency and accuracy compared to traditional manual measurement and drawing.

[0034] In some embodiments, the surveying bracket 8 includes a plug rod that is adapted to and plugs into a socket 7. A vertical rod is connected to the top of the plug rod, and a horizontal rod extending to the left is connected to the top of the vertical rod. A circular buckle 10 for fixing a drawing pen 9 is connected to the end of the horizontal rod. The circular buckle 10 is preferably made of elastic plastic to facilitate quick disassembly and removal of the drawing pen 9. The surveying bracket 8 has a horizontal "U" shape, so that the tip of the drawing pen 9 is above the pipe to be measured. The distance between the drawing pen 9 and the pipe to be measured is adjusted by the circular buckle 10. After preparation, pushing the vertical rod will allow it to draw a straight center line on the top of the pipe.

[0035] In some embodiments, an inner cylinder 11 is fixedly connected to the support plate 2. The inner cylinder 11 is placed inside the grip cylinder 1, and a cavity 12 is left between the inner cylinder 11 and the grip cylinder 1. The cavity 12 is connected to the socket 7 for the surveying support 8 to move. When the center line needs to be drawn after calibration, the surveying support 8 in the socket 7 can be pushed to move linearly. When the movement distance is large, it can be moved further with the help of the space in the cavity 12 to ensure that the drawing pen 9 can be above the pipe to draw the center line. At least one set of rotating bearings 13 are connected between the inner cylinder 11 and the drive rod 5, so that when the operator holds the grip cylinder 1, he can rotate the drive rod 5 inside it. After the grip cylinder 1 and the support plate 2 are held, they serve as a fixed point. Rotating the drive rod 5 inside them can drive the gear 4 to rotate. After the gear 4 rotates, it drives the three arc-shaped arms 3 to expand radially at equal distances, so that the arc-shaped arms 3 can be supported inside the pipe.

[0036] Furthermore, a damping bearing 14 is connected between the inner cylinder 11 and the calibration disk 6. The damping bearing 14 has a damping feel, which allows the calibration disk 6 to rotate or stop at a certain angle. The calibration disk 6 can be rotated by the damping bearing 14. By manually rotating the insertion hole 7 in the calibration disk 6 to directly above the drive rod 5, the calibration disk 6 can be stopped at the current position without external interference under the action of damping, which is convenient for the subsequent insertion of the surveying bracket 8 into the insertion hole 7 to draw the center line.

[0037] Furthermore, the calibration pan 6 is made of metal to ensure its structural strength and stability. An angle line 16 is axially arranged on one side of the calibration pan 6 as an auxiliary reference. A level tube 15 is magnetically connected to the calibration pan 6. The level tube 15 is detachably connected to the calibration pan 6 via a magnetic base, facilitating installation and adjustment by the operator as needed. During reagent operation, when the operator rotates the calibration pan 6 to position the insertion hole 7 directly above the drive rod 5, the measuring bracket 8 in the insertion hole 7 may experience slight offset due to the lack of a clear reference point, resulting in a certain error in the drawn center line. In this design, by connecting the level tube 15 to the calibration pan 6 and observing the position of the bubble inside the level tube 15, the operator can accurately rotate the insertion hole 7 to be directly above the drive rod 5, thereby significantly improving alignment accuracy and reducing errors.

[0038] refer to Figure 1In some embodiments, the arc-shaped arm 3 includes an interconnected arc-shaped toothed portion 31 and an arc-shaped support portion 32. The arc-shaped toothed portion 31 is connected to the support disk 2 via a rotating shaft 35 and meshes with a gear 4 to control the opening and closing of the arc-shaped arm 3. The outer end of the arc-shaped support portion 32 has an arc-shaped profile that matches the inner wall of the pipe and a receiving cavity 33 for accommodating adjacent arc-shaped arms 3. The arc-shaped toothed portion 31 and the arc-shaped support portion 32 are connected by welding, riveting, or integral molding to ensure the structural strength and durability. In the retracted state, the receiving cavity 33 in the arc-shaped support portion 32 can accommodate adjacent arc-shaped arms 3, reducing them to a smaller size, saving space, and facilitating storage and transport.

[0039] Furthermore, the curved arm 3 has several sets of hollow holes 34, which can reduce the overall weight and make it easier to carry and transport.

[0040] The surveying process for this device is as follows:

[0041] S1: The operator holds the gripping cylinder 1 and sends the arc-shaped arm 3 into the pipe to be measured. Then, the operator screws the drive rod 5. With the connection of the rotating bearing 13, the gripping cylinder 1 remains stationary. The drive rod 5 rotates and drives the gear 4 to rotate. The gear 4 further drives the three sets of arc-shaped arms 3 to expand radially at equal intervals, so that the arc-shaped support arm of the arc-shaped arm 3 abuts against the inner wall of the pipe. Based on the principle of three points to determine a circle, the axis of the drive rod 5 coincides with the center line of the pipe.

[0042] S2: Rotate the calibration disk 6, and through the observation level tube 15, rotate the insertion hole 7 in the calibration disk 6 to be directly above the drive rod 5;

[0043] S3: First, insert the drawing pen 9 into the circular buckle 10 on the surveying bracket 8, then insert the bottom end of the surveying bracket 8 into the socket, then slide the surveying bracket 8 linearly so that the drawing pen 9 is above the outer wall of the pipe, then press down the drawing pen 9 and slide the surveying bracket 8 linearly to draw the center line of the drainage pipe.

[0044] S4: After drawing, remove the pen 9 and drawing stand, and rotate the drive rod 5 in the opposite direction to retract the three sets of arc arms 3 to their minimum range for subsequent storage or transfer.

[0045] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A device for surveying the centerline of small-diameter drainage pipes, characterized in that, include: Support plate (2), one side of support plate (2) is connected to at least three sets of rotatable arc arms (3), and a gear (4) is meshed together at the center of the arc arms (3); The grip (1) is fixed to the other side of the support plate (2). A rotatable drive rod (5) is connected inside the grip (1). One end of the drive rod (5) is connected to the gear (4). By rotating the drive rod (5), the gear (4) is rotated, thereby causing the arc arm (3) to open or close. The other end of the drive rod (5) extends to the outside of the grip (1). The calibration disk (6) is rotatably mounted on the drive rod (5). The calibration disk (6) has an insertion hole (7). A surveying bracket (8) is inserted into the insertion hole (7). A drawing pen (9) is detachably connected to the surveying bracket (8). The drawing pen (9) is perpendicular to the drive rod (5).

2. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, The surveying support (8) includes a plug rod that is adapted to be inserted into a socket (7). A vertical rod is connected above the plug rod, and a horizontal rod extending to the left is connected to the top of the vertical rod. A circular buckle (10) for fixing a drawing pen (9) is connected to the end of the horizontal rod.

3. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, An inner cylinder (11) is fixedly connected to the support plate (2). The inner cylinder (11) is placed inside the grip cylinder (1) and a cavity (12) is left between it and the grip cylinder (1). The cavity (12) is connected to the insertion hole (7) for the surveying bracket (8) to move. At least one set of rotating bearings (13) are connected between the inner cylinder (11) and the drive rod (5).

4. The centerline mapping device for small-diameter drainage pipes according to claim 3, characterized in that, A damping bearing (14) is connected between one side of the inner cylinder (11) and the calibration plate (6).

5. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, The arc-shaped arm (3) includes an arc-shaped toothed part (31) and an arc-shaped support part (32) connected to each other. The arc-shaped toothed part (31) is connected to the support plate (2) through a rotating shaft (35). The arc-shaped toothed part meshes with a gear (4) to control the opening and closing of the arc-shaped arm (3). The arc-shaped support part (32) has an arc-shaped profile that matches the inner wall of the pipe and a receiving cavity (33) for accommodating adjacent arc-shaped arms (3).

6. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, The end of the drive rod (5) has a polygonal structure.

7. The small-diameter drainage pipe centerline mapping device according to claim 1, characterized in that, The calibration disk (6) is made of metal and a level tube (15) is magnetically connected to the calibration disk (6).

8. The centerline mapping device for small-diameter drainage pipes according to claim 7, characterized in that, The calibration disk (6) is provided with an angle line (16) along its axis.

9. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, The arc-shaped arm (3) has several sets of hollow holes (34).

10. The centerline mapping device for small-diameter drainage pipes according to claim 1, characterized in that, The socket (7) is designed with rounded corners.

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