A pipe diameter measuring device for construction engineering cost estimation

Abstract

This utility model is applicable to the field of construction engineering cost estimation, and provides a pipe diameter measuring device for construction engineering cost estimation. It includes a housing, a drive assembly, a positioning assembly, a measuring assembly, a laser sensor, and a display assembly. The housing provides a supporting foundation. The drive assembly drives the positioning assembly to move through the meshing of a worm gear and a worm wheel. The arc-shaped positioning plate of the positioning assembly achieves precise positioning of the pipe. The measuring assembly uses a protective cylinder and a measuring rod to complete mechanical measurement. The laser sensor is electrically connected to the display assembly to achieve electronic measurement and data display. This utility model improves accuracy through dual mechanical and electronic measurement, is easy to operate, and has good centering effect, making it suitable for precise pipe diameter measurement scenarios in construction engineering cost estimation.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering cost estimation, and in particular relates to a pipe diameter measuring device for construction engineering cost estimation. Background Technology

[0002] For example, Chinese Patent (Publication No.: CN219416029U) discloses a pipe diameter measuring device for construction engineering cost estimation, including a base plate. The upper end of the base plate has a movable groove. The triangular arrangement of the first measuring rod reduces the contact area between the first measuring rod and the pipe, thus preventing the first measuring rod from not being able to make close contact with the pipe due to an excessively large contact area, which would affect the measurement accuracy. The threaded ring and threaded rod allow one side of the first and second measuring rods to make close contact with the pipe and effectively fix the first and second measuring rods, facilitating the recording of measurement data. The arrangement of the second and first measuring rods facilitates simultaneous measurement of the pipe wall thickness. It also avoids the need to adjust the height of the measuring plate according to different pipe models, thus preventing the measuring ruler from being unable to be at the center of the pipe due to height adjustment, thereby avoiding affecting the measurement accuracy.

[0003] However, significant drawbacks remain: First, the operation is cumbersome, requiring sequential rotation of the screw and threaded rod to complete the measurement and positioning, reducing work efficiency; second, the measurement accuracy is insufficient, relying solely on a single mechanical scale measurement and lacking a data verification mechanism, making it susceptible to human reading errors; third, the centering effect is poor, using a flat base plate with two clamping plates to position the pipe fitting makes it difficult to ensure the measurement reference passes through the pipe fitting's center, leading to measurement deviations; fourth, the measuring components lack protection, and after long-term use, they are prone to accuracy degradation due to collisions and wear. These problems seriously affect the accuracy and efficiency of pipe fitting measurement in construction engineering cost estimation.

[0004] Therefore, a pipe diameter measuring device for construction engineering cost estimation is needed to solve the above problems. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a pipe diameter measuring device for construction engineering cost estimation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pipe diameter measuring device for construction engineering cost estimation includes a housing, a drive assembly, a positioning assembly, a measuring assembly, a laser sensor, and a display assembly. The housing includes a casing and a handle, serving as an integral support structure and providing a stable installation space for the drive assembly, positioning assembly, and measuring assembly. The handle is connected to the back of the casing, facilitating operator gripping and moving the device, improving portability and operational flexibility on the construction site. The drive assembly, positioning assembly, and measuring assembly are all housed within the casing. The drive assembly, acting as a power source, drives the positioning assembly via mechanical transmission, enabling the positioning plate to move synchronously closer to or further away, achieving positioning without multiple adjustments and solving the problem of cumbersome operation in traditional devices. The positioning assembly achieves precise positioning through close contact with the pipe surface, providing a reliable benchmark for measurement and ensuring the accuracy of the measurement data. The measuring assembly completes pipe diameter measurement through the relative movement of the mechanical structure, providing basic data for subsequent data calculation.

[0008] A further technical solution includes a drive assembly comprising a worm, a worm wheel, and a turntable. The worm is rotatably connected to the housing, and the turntable is connected to one end of the worm and extends out of the housing for easy manual operation. The worm wheel meshes with the worm, and the rotation of the worm drives the worm wheel to rotate, thereby realizing the conversion of motion direction and power transmission. The worm wheel is rotatably connected to the housing, and has an arc-shaped drive hole and a through groove. The arc-shaped drive hole on the worm wheel provides a sliding track for the push rod, and the through groove provides movement space for the limit rod, ensuring a smooth and orderly transmission process.

[0009] A further technical solution includes a positioning assembly comprising four push rods, four limiting rods, and four positioning plates. The four push rods are slidably connected within the drive hole, converting the rotational motion of the worm gear into linear motion of the push rods. The four limiting rods are respectively connected to the outer side of the push rods and pass through the through slots, limiting and guiding the movement of the push rods to prevent them from deviating. The four limiting rods are slidably connected within the housing. The four positioning plates are respectively connected to the adjacent ends of the limiting rods. The positioning plates are arc-shaped, allowing them to closely fit the outer or inner circle of the pipe fitting. The synchronous movement of the four positioning plates achieves multi-angle centering, significantly improving positioning accuracy.

[0010] A further technical solution includes two protective cylinders and two measuring rods. The two protective cylinders are respectively connected to two adjacent positioning plates, and the two measuring rods are respectively connected to two other positioning plates. The measuring rods are slidably connected inside the protective cylinders. When the positioning plates move, the measuring rods move synchronously with the positioning plates and extend or retract relative to the protective cylinders. The mechanical measurement of the pipe diameter is achieved through the relative displacement between the two. When not measuring, the protective cylinders form a protective enclosure for the measuring rods, preventing the measuring rods from losing accuracy due to collisions or wear, and extending the service life of the device.

[0011] In a further technical solution, the laser sensor is connected to two positioning plates, enabling real-time detection of the distance between the positioning plates and realizing electronic measurement of the pipe diameter; the display component is connected to the back of the housing, and the laser sensor is electrically connected to the display component, which can visualize the data detected by the laser sensor, making it easy for operators to quickly read the data, and the electronic measurement and mechanical measurement form a dual verification, further improving the measurement accuracy.

[0012] In a further technical solution, two bearings are connected inside the housing, and the two sides of the worm gear are respectively connected to the two bearings. The bearings provide support for the rotation of the worm gear, reduce rotational friction, ensure smooth and stable transmission, and reduce mechanical loss.

[0013] A further technical solution involves providing a limiting groove and a guide groove within the housing. The limiting rod is slidably connected within the limiting groove, and both ends of the push rod are slidably connected within the guide groove. The limiting groove and guide groove within the housing respectively restrict the movement trajectory of the limiting rod and the push rod, ensuring that the limiting rod and the push rod move smoothly along a preset path. This avoids inaccurate positioning or measurement errors caused by component movement deviation, thereby improving the overall structural stability of the device.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model is simple and efficient to operate: through the worm gear-worm wheel transmission structure of the drive component, rotating a single turntable can drive the positioning component to move synchronously, without the need to adjust multiple components in sequence, which greatly simplifies the operation process, improves measurement efficiency, and is suitable for the rapid measurement needs of construction sites.

[0016] This invention provides accurate and reliable centering: four arc-shaped positioning plates simultaneously approach and fit tightly against the pipe, achieving centering of the pipe from multiple angles and ensuring that the measurement reference passes through the center of the pipe. This solves the problem of poor centering effect of traditional devices and provides a guarantee for high-precision measurement.

[0017] This invention features dual measurement verification: combining mechanical measurement of the measurement components with electronic measurement of the laser sensor, with dual data mutually verifying each other, effectively reducing the error of a single measurement method, improving the reliability of measurement results, and meeting the high precision requirements of engineering cost estimation.

[0018] This invention offers excellent protection: the measuring component adopts a nested structure of a protective cylinder and a measuring rod. When not in use, the measuring rod is fully retracted into the protective cylinder, avoiding the impact of collisions and wear on measurement accuracy and extending the service life of the device.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention from the front view;

[0021] Figure 2 This is a rear-view three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is a rear-view three-dimensional cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is a side-view perspective sectional structural diagram of the present invention;

[0024] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0025] In the diagram: 1. Outer shell; 11. Housing; 12. Limiting frame; 13. Handle; 14. Limiting groove; 15. Guide groove; 16. Bearing; 2. Drive assembly; 21. Worm gear; 22. Turntable; 23. Worm wheel; 24. Drive hole; 25. Through groove; 3. Positioning assembly; 31. Push rod; 32. Limiting rod; 33. Positioning plate; 4. Measuring assembly; 41. Protective cylinder; 42. Measuring rod; 5. Laser sensor; 6. Display assembly. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0028] Example 1

[0029] like Figures 1-5 As shown, this utility model embodiment provides a pipe diameter measuring device for construction engineering cost estimation, including a housing 1 and a drive assembly 2. The housing 1 includes a shell 11 and a handle 13. The shell 11 is integrally formed from high-strength alloy material, with a reserved installation chamber inside, providing a closed and stable installation space for the drive assembly 2, positioning assembly 3 and measuring assembly 4. The handle 13 is fixedly connected to the middle of the back of the shell 11 by bolts, and the surface is provided with an anti-slip rubber sleeve to improve grip comfort and operation stability.

[0030] The drive assembly 2 includes a worm 21, a worm wheel 23, and a turntable 22. The worm 21 is rotatably connected to a bearing seat on the inner wall of the housing 11 via a bushing. One end of the worm 21 passes through the side wall of the housing 11 and is welded and fixed to the turntable 22. The edge of the turntable 22 is provided with anti-slip texture to facilitate manual rotation by the operator. The worm wheel 23 is rotatably connected to the inside of the housing 11 via a central shaft and is engaged with the worm 21. Four arc-shaped drive holes 24 are evenly opened at the rim of the worm wheel 23, and an annular through groove 25 is opened in the middle of the wheel. The drive holes 24 and the through groove 25 are distributed along the circumference of the worm wheel 23.

[0031] In this embodiment, the integrated structure of the outer shell 1 ensures the overall rigidity of the device and can adapt to the complex environment of the construction site; the worm gear 21-worm wheel 23 transmission structure of the drive component 2 realizes synchronous drive with single input and multiple outputs, and only the turntable 22 needs to be rotated to drive the subsequent positioning components to move, which greatly simplifies the operation process and solves the cumbersome problem of traditional devices requiring multiple adjustments.

[0032] Example 2

[0033] The difference between this embodiment and embodiment 1 is that the positioning component 3 includes four push rods 31, four limiting rods 32, and four positioning plates 33. The middle of each of the four push rods 31 is slidably connected to the arc-shaped drive hole 24 of the worm gear 23 via a slider. Both ends of the push rods 31 extend into the guide groove 15 of the inner sidewall of the housing 11 and form a sliding fit. One end of each of the four limiting rods 32 is vertically welded to the outer sidewall of the push rod 31, and the other end passes through the through groove 25 of the worm gear 23 and extends into the limiting groove 14 of the housing 11. The limiting rods 32 are slidably connected to the limiting groove 14. The four positioning plates 33 are respectively fixed to the end of the limiting rod 32 near the center of the device by screws. The shape of the positioning plate 33 is set to be an arc shape that matches the outer circle of the pipe, and a wear-resistant rubber pad is pasted on the inner sidewall.

[0034] In this embodiment, the positioning component 3 converts the rotational motion of the worm gear 23 into linear motion through the cooperation of the push rod 31 and the drive hole 24. At the same time, the sliding of the limiting rod 32 in the limiting groove 14 ensures the stability of the motion trajectory. The four arc-shaped positioning plates 33 synchronously approach the pipe and fit tightly together, achieving centering from multiple angles and ensuring that the measurement reference passes through the center of the pipe, thus solving the problem of poor centering effect of traditional devices.

[0035] Example 3

[0036] The difference between this embodiment and embodiment 1 is that the measuring component 4 includes two protective cylinders 41 and two measuring rods 42: the two protective cylinders 41 are respectively embedded in the inner sidewalls of two adjacent positioning plates 33, the axis of the protective cylinder 41 is parallel to the arc-shaped central axis of the positioning plate 33, and the cylinder wall is provided with millimeter-level scale; one end of the two measuring rods 42 is welded and fixed to the inner sidewalls of the other two positioning plates 33, and the other end is inserted into the protective cylinder 41 to form a clearance fit, the surface of the measuring rod 42 is provided with scale markings that match the protective cylinder 41, and the end is provided with a wear-resistant metal head.

[0037] In this embodiment, the measuring component 4 achieves mechanical measurement through the relative sliding of the protective cylinder 41 and the measuring rod 42. The dual-scale design facilitates reading calibration. In the non-measuring state, the measuring rod 42 is completely retracted into the protective cylinder 41, which forms a protective enclosure for the measuring rod 42, avoiding the decrease in accuracy caused by collisions and wear, and extending the service life of the device.

[0038] Example 4

[0039] The difference between this embodiment and embodiment 1 is that the laser sensor 5 is fixed to the center of the inner side of two opposing positioning plates 33 by an embedded installation method. The laser emission port of the sensor is flush with the inner side wall of the positioning plate 33, and the emission direction points to the opposite positioning plate 33. The display component 6 is fixed above the handle 13 on the back of the housing 11 by a buckle. It includes an LCD display screen, a control chip and a lithium battery. The surface of the display screen is covered with scratch-resistant glass. The signal output terminal of the laser sensor 5 is electrically connected to the control chip of the display component 6 through a shielded wire. The control chip is electrically connected to the display screen and the lithium battery respectively. The lithium battery is powered through a charging interface.

[0040] In this embodiment, the laser sensor 5 detects the distance between the positioning plates 33 in real time. The data is processed by the control chip and displayed intuitively by the display component 6, realizing electronic measurement. The electronic measurement and the mechanical measurement of the measurement component 4 form a dual verification, which effectively reduces the error of a single measurement method, improves the reliability of the measurement results, and meets the high precision requirements of engineering cost.

[0041] Example 5

[0042] The difference between this embodiment and embodiment 1 is that: two bearings 16 are fixedly connected to the inside of the housing 11 near the two sides of the worm gear 23 by bearing seats, and the two ends of the central shaft of the worm gear 23 are inserted into the inner ring of the bearing 16 and are interference fit; four limiting grooves 14 are opened along the circumferential direction on the inner side wall of the housing 11, and the cross section of the limiting grooves 14 is T-shaped to match the end shape of the limiting rod 32; the guide grooves 15 are opened at the upper and lower ends of the inner side wall of the housing 11, extend radially, and are slidably connected to the two ends of the push rod 31.

[0043] In this embodiment, the bearing 16 provides support for the rotation of the worm gear 23, reducing friction and ensuring smooth transmission; the limiting groove 14 and the guide groove 15 respectively limit the movement trajectory of the limiting rod 32 and the push rod 31, avoiding inaccurate positioning or measurement errors caused by component offset, and improving the overall structural stability and long-term reliability of the device.

[0044] Working principle and usage process of this invention:

[0045] When it is necessary to measure the pipe diameter, first adjust the initial position of the positioning plate according to the inner or outer diameter required for measurement: when measuring the outer diameter, place the four positioning plates 33 on the outside of the pipe; when measuring the inner diameter, insert the four positioning plates 33 into the inside of the pipe, and the operator holds the handle 13 to stabilize the housing 11, and visually adjusts to ensure that the device and the pipe are coaxial.

[0046] Rotating the turntable 22 causes the worm gear 21 to rotate around its own axis within the housing 11. Since the worm gear 21 meshes with the worm wheel 23, the rotational force of the worm gear 21 is transmitted to the worm wheel 23, causing the worm wheel 23 to rotate circumferentially around the bearing 16. When the worm wheel 23 rotates, its internal arc-shaped drive hole 24 rotates synchronously. The inner wall of the drive hole 24 pushes the push rod 31 to slide linearly along the guide groove 15 of the housing 11. The push rod 31 drives the limiting rod 32 to slide synchronously within the limiting groove 14. The limiting groove 14 and the guide groove 15 together restrict the movement trajectory of the push rod 31 and the limiting rod 32, ensuring that they do not deviate. The limiting rod 32 drives the four positioning plates 33 to synchronously approach the pipe fitting. Because the positioning plates 33 are arc-shaped and move synchronously, the four positioning plates 33 will eventually fit tightly against the outer or inner circle of the pipe fitting, achieving precise centering of the pipe fitting.

[0047] During the movement of the positioning plate 33, the measuring components and the electronic measuring system work synchronously: the measuring rod 42 moves with the positioning plate 33 and extends relative to the protective cylinder 41, and the mechanical measurement data can be read by the relative displacement between the two; at the same time, the laser sensor 5 moves with the positioning plate 33, detects the distance between the two positioning plates 33 in real time, and transmits the detection data to the display component 6, which is then processed by the control chip and displayed on the screen.

[0048] After measurement, the turntable 22 is rotated in the reverse direction. The worm gear 21 drives the worm wheel 23 to rotate in the reverse direction. The push rod 31 and the limit rod 32 drive the positioning plate 33 to move away from each other. The measuring rod 42 retracts into the protective cylinder 41 under the action of the positioning plate 33, and the laser sensor 5 stops detecting. The operator can compare the mechanical measurement data and the electronic measurement data for double verification to ensure the accuracy of the measurement results.

[0049] The entire measurement process achieves synchronous positioning through a single drive source, which is simple to operate and accurate in centering, effectively solving the problems of cumbersome operation, poor centering effect and insufficient accuracy of traditional devices.

[0050] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipe diameter measuring device for construction engineering cost estimation, comprising a housing (1), a driving assembly (2), a positioning assembly (3), a measuring assembly (4), a laser sensor (5), and a display assembly (6), characterized in that: The outer casing (1) includes a housing (11) and a handle (13). The handle (13) is connected to the back of the housing (11). The drive assembly (2), the positioning assembly (3) and the measuring assembly (4) are all located inside the housing (11). The drive assembly (2) is used to drive the positioning assembly (3) to move. The positioning assembly (3) is used to position the pipe. The measuring assembly (4) is used to mechanically measure the pipe diameter.

2. The pipe diameter measuring device for construction engineering cost estimation according to claim 1, characterized in that: The drive assembly (2) includes a worm (21), a worm wheel (23) and a turntable (22). The worm (21) is rotatably connected to the housing (11). The turntable (22) is connected to one end of the worm (21) and extends out of the housing (11). The worm wheel (23) meshes with the worm (21) and is rotatably connected to the housing (11). The worm wheel (23) has an arc-shaped drive hole (24) and a through groove (25).

3. The pipe diameter measuring device for construction engineering cost estimation according to claim 1, characterized in that: The positioning component (3) includes four push rods (31), four limiting rods (32) and four positioning plates (33). The four push rods (31) are slidably connected in the drive hole (24). The four limiting rods (32) are respectively connected to the outside of the push rods (31) and pass through the through groove (25). The four limiting rods (32) are slidably connected in the housing (11). The four positioning plates (33) are respectively connected to the end of the limiting rods (32) that are close to each other. The positioning plates (33) are arc-shaped.

4. The pipe diameter measuring device for construction engineering cost estimation according to claim 1, characterized in that: The measuring component (4) includes two protective cylinders (41) and two measuring rods (42). The two protective cylinders (41) are respectively connected to two adjacent positioning plates (33), and the two measuring rods (42) are respectively connected to two other positioning plates (33). The measuring rods (42) are slidably connected to the protective cylinders (41).

5. The pipe diameter measuring device for construction engineering cost estimation according to claim 1, characterized in that: The laser sensor (5) is connected inside the two positioning plates (33), the display component (6) is connected to the back of the housing (11), the laser sensor (5) is electrically connected to the display component (6), the laser sensor (5) is used to electronically measure the pipe diameter, and the display component (6) is used to display the measurement data.

6. The pipe diameter measuring device for construction engineering cost estimation according to claim 2, characterized in that: The housing (11) is connected to two bearings (16), and the two sides of the worm gear (23) are respectively connected to the two bearings (16). The bearings (16) are used to support the rotation of the worm gear (23).

7. The pipe diameter measuring device for construction engineering cost estimation according to claim 3, characterized in that: The housing (11) has a limiting groove (14) and a guide groove (15). The limiting rod (32) is slidably connected in the limiting groove (14). The two ends of the push rod (31) are slidably connected in the guide groove (15). The limiting groove (14) and the guide groove (15) are used to limit the movement trajectory of the limiting rod (32) and the push rod (31).

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