A concrete detection device capable of measuring the distance between steel bars
Patent Information
- Application Number
- CN202522507139.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-26
AI Technical Summary
Traditional testing methods for measuring rebar spacing are cumbersome and subject to spatial limitations, making accurate measurement particularly difficult in areas with dense rebar.
It adopts a drive structure with gear and rack meshing transmission, and controls the extension and retraction of the measuring plate through a motor. Combined with the wedge measuring head design, it can quickly adjust and measure the spacing of steel bars. It is also equipped with a scale and folding curtain to prevent dust intrusion, thereby improving measurement accuracy and efficiency.
It significantly shortens operation time, improves detection efficiency, reduces manual labor consumption, enhances measurement capabilities in confined spaces, reduces mechanical failures and maintenance costs, and ensures measurement accuracy and coverage.
Smart Images
Figure CN224933415U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete testing technology, specifically a testing device for concrete testing that can measure the spacing of reinforcing bars. Background Technology
[0002] Concrete construction refers to the entire process of mixing raw materials such as cement, sand, gravel, water, and admixtures according to the design ratio to form a concrete mixture, and then using processes such as transportation, pouring, and vibration compaction to shape it in the formwork and cure it to form a structural component or building entity with specific strength and durability. It covers key links from raw material preparation, mix design, mixing and transportation to on-site pouring, vibration leveling, surface treatment, and subsequent moisture retention and heat preservation curing. It is the core construction activity to ensure the quality and performance of concrete structures.
[0003] In concrete structure construction, the accuracy of rebar spacing directly affects the structure's load-bearing capacity, crack resistance, and durability. Traditional testing methods have the following drawbacks:
[0004] If a steel tape measure or caliper is used, manual point-by-point measurement is required, which is cumbersome and easily restricted by space (such as in areas with dense steel reinforcement).
[0005] Therefore, we need to propose a testing device for concrete that can measure the spacing of reinforcing bars. Utility Model Content
[0006] The purpose of this invention is to provide a testing device for concrete testing that can measure the spacing of reinforcing bars, enabling rapid adjustment and measurement of the distance between the upper and lower measuring heads. Compared with the traditional manual measurement using steel tape measures or calipers point by point, this device greatly saves operation time and improves testing efficiency, thereby solving the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A concrete testing device for measuring rebar spacing, comprising:
[0009] The main structure includes a sleeve and a measuring plate. The measuring plate is slidably inserted into the sleeve. A top plate is provided on the top of the measuring plate, and an upper measuring head is provided at one end of the top plate. A lower measuring head corresponding to the upper measuring head is provided on the upper outer wall of the sleeve.
[0010] A drive structure is located inside the sleeve. The drive structure includes a gear and a rack. The rack is mounted on the measuring plate. The gear and rack are meshed. The rotation of the gear can drive the measuring plate to extend and retract from the sleeve port. The distance between the upper measuring head and the lower measuring head is the measuring distance.
[0011] Preferably, the measuring plate has a notch in the longitudinal direction, the rack is disposed on the inner wall of the notch, and the gear is located inside the notch and meshes with the rack.
[0012] Preferably, a motor is installed on the outer wall of the upper end of the sleeve, and the output end of the motor extends into the inner cavity of the sleeve and is connected to the gear transmission.
[0013] Preferably, the lower end of the sleeve is provided with a base, a rechargeable battery is installed inside the base, a motor forward and reverse control button is provided on the outside of the base, and a handle is provided at the lower end of the base for the user to hold.
[0014] Preferably, a scale is provided at the other end of the top plate, and a storage sleeve is provided on the outer wall of the sleeve. The scale is slidably inserted into the storage sleeve. The upper end of the scale is the zero point. The exposed length of the scale is equal to the distance between the upper and lower measuring heads. The measurement distance can be determined by reading the scale.
[0015] Preferably, a folding curtain is installed between the top port of the sleeve and the top plate, which can extend and retract with the measuring plate to prevent external dust and impurities from damaging the gears and racks.
[0016] Preferably, both the upper and lower measuring heads are elongated and wedge-shaped in cross-section, which facilitates the user to probe into narrow spaces to measure the spacing between adjacent reinforcing bars.
[0017] Compared with the prior art, the beneficial effects of this utility model are:
[0018] 1. This utility model uses the meshing transmission of gears and racks in the drive structure to drive the measuring plate to extend and retract from the sleeve port, thereby realizing the rapid adjustment and measurement of the distance between the upper and lower measuring heads. Compared with the traditional manual measurement using steel tape measures or calipers point by point, it greatly saves operation time and improves detection efficiency.
[0019] 2. The upper and lower measuring heads are long and wedge-shaped in cross-section. This special shape design makes it easier to probe into narrow spaces such as densely packed reinforcing bars to measure the spacing between adjacent reinforcing bars, effectively overcoming the disadvantage of traditional methods that are difficult to operate in space-constrained areas.
[0020] 3. A folding curtain is installed between the top port of the sleeve and the top plate. It can extend and retract with the measuring plate, effectively preventing external dust and impurities from entering the gears and racks, reducing mechanical failures caused by dust and impurities, extending the service life of the device, and reducing maintenance costs. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the sleeve of this utility model;
[0023] Figure 3 This is a schematic diagram of the structure of the measuring plate of this utility model;
[0024] Figure 4 This is a schematic diagram of the structure of the storage sleeve of this utility model.
[0025] In the diagram: 1. Sleeve; 2. Base; 3. Handle; 4. Measuring plate; 5. Top plate; 6. Upper measuring head; 7. Lower measuring head; 8. Notch; 9. Rack; 10. Motor; 11. Gear; 12. Ruler; 13. Storage sleeve; 14. Folding curtain. Detailed Implementation
[0026] 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.
[0027] Please see Figure 1-4 This utility model provides a testing device for concrete testing that can measure the spacing of reinforcing bars, comprising:
[0028] The main structure includes a sleeve 1 and a measuring plate 4. The measuring plate 4 is slidably inserted into the sleeve 1. A top plate 5 is provided on the top of the measuring plate 4. An upper measuring head 6 is provided at one end of the top plate 5. A lower measuring head 7 corresponding to the upper measuring head 6 is provided on the upper outer wall of the sleeve 1.
[0029] The drive structure is located inside the sleeve 1. The drive structure includes a gear 11 and a rack 9. The rack 9 is mounted on the measuring plate 4. The gear 11 and the rack 9 are meshed. The rotation of the gear 11 can drive the measuring plate 4 to extend and retract from the port of the sleeve 1. The distance between the upper measuring head 6 and the lower measuring head 7 is the measuring distance.
[0030] Specifically, the measuring plate 4 has a notch 8 longitudinally formed, a rack 9 is disposed on the inner wall of the notch 8, and a gear 11 is located inside the notch 8 and meshes with the rack 9. A motor 10 is mounted on the upper outer wall of the sleeve 1, and the output end of the motor 10 extends into the inner cavity of the sleeve 1 and is connected to the gear 11 for transmission. A base 2 is provided at the lower end of the sleeve 1, a rechargeable battery is installed inside the base 2, and a control button for forward and reverse rotation of the motor 10 is provided on the outside of the base 2. A handle 3 is provided at the lower end of the base 2 for the user to hold.
[0031] The measuring plate 4 is slidably inserted into the sleeve 1 to form a retractable main structure. When driven, the motor 10 drives the gear 11 to rotate. The gear 11 meshes with the rack 9 on the inner wall of the notch 8 of the measuring plate 4, causing the measuring plate 4 to extend or retract along the axial direction of the sleeve 1. This changes the vertical distance between the upper measuring head 6 on the top plate 5 and the lower measuring head 7 on the outer wall of the sleeve 1. When in use, the upper and lower measuring heads 7 are opened, and the two steel bars to be measured are placed between the upper and lower measuring heads 7. Then the distance between the upper and lower measuring heads 7 is reduced until the upper and lower measuring heads 7 touch the two steel bars respectively. This distance is the measured value of the steel bar spacing.
[0032] The rechargeable battery inside the base 2 powers the motor 10. The motor 10 can be rotated forward or backward via the control button on the outside of the base 2 (corresponding to the extension / retraction of the measuring plate 4). The testing personnel can stabilize the equipment by holding the handle 3 at the bottom of the base 2, thus achieving one-handed operation.
[0033] In summary, the use of gear 11 and rack 9 transmission to replace the manual measurement of traditional steel tape measures / calipers, and the extension and retraction of the measuring plate 4 controlled by a button, greatly shortens the measurement time for a single set of rebar spacing and improves efficiency; the one-handed grip design reduces manual physical exertion and is especially suitable for batch inspection of large-area structures (such as floor slabs and walls).
[0034] The telescopic structure allows for flexible adjustment of the measuring head spacing to adapt to different rebar spacing scenarios; the compact design of the measuring plate 4 and sleeve 1 facilitates operation in areas with dense rebar (such as beam-column joints), avoiding the problem of traditional tools being difficult to reach, and improving measurement coverage.
[0035] The handle 3 features an anti-slip texture. The anti-slip design of the handle 3 (1mm deep surface texture) ensures a stable grip and reduces the risk of operation in high-altitude or humid environments.
[0036] For a preferred embodiment, please refer to Figure 1-4 :
[0037] A scale 12 is provided at the other end of the top plate 5, and a storage sleeve 13 is provided on the outer wall of the sleeve 1. The scale 12 is slidably inserted into the storage sleeve 13. The upper end of the scale 12 is the zero point. The exposed length of the scale 12 is equal to the distance between the upper measuring head 6 and the lower measuring head 7. The measurement distance can be determined by reading the reading on the scale 12.
[0038] The scale 12 at the other end of the top plate 5 is rigidly connected to the measuring plate 4 and extends and retracts synchronously with the measuring plate 4. The scale 12 is slidably inserted into the storage sleeve 13 on the outer wall of the sleeve 1, with its upper end being the zero point. The length exposed outside the storage sleeve 13 is completely consistent with the distance between the upper and lower measuring heads 7 (mechanical synchronous design). By reading the scale value aligned with the edge of the storage sleeve 13 (accuracy 1mm), the rebar spacing data can be directly obtained.
[0039] In summary, the scale 12 is mechanically synchronized with the measuring head, avoiding visual deviations caused by the "oblique reading" of traditional steel tape measures. The scale is clearly marked (minimum division 1mm), eliminating the need for estimation and making it particularly suitable for non-professionals, thus improving data accuracy. Real-time, intuitive display of measurements allows for direct reading or photographic recording without additional marking or memorization, improving data recording efficiency and reducing human error.
[0040] For a preferred embodiment, please refer to Figure 1-2 :
[0041] A folding curtain 14 is installed between the top port of the sleeve 1 and the top plate 5, which can extend and retract with the measuring plate 4 to prevent external dust and impurities from damaging the gear 11 and rack 9.
[0042] The folding curtain 14 (made of wear-resistant nylon, 0.3mm thick) is fixed at one end to the top port of the sleeve 1 and connected to the top plate 5 at the other end. It expands or contracts synchronously with the extension and retraction of the measuring plate 4, always sealing the gap between the sleeve 1 and the measuring plate 4, forming a physical barrier to block external impurities.
[0043] It can prevent dust, concrete debris, and cement slurry from the construction site from entering the sleeve 1, avoiding transmission failure caused by impurities jamming or wear between gear 11 and rack 9, and extending the service life of components. It reduces the frequency of cleaning and maintenance of the transmission structure, lowers maintenance costs, and is suitable for high-dust environments at construction sites.
[0044] For a preferred embodiment, please refer to Figure 1-4 :
[0045] Both the upper measuring head 6 and the lower measuring head 7 are elongated and wedge-shaped in cross-section, making it convenient for users to probe into narrow spaces to measure the spacing between adjacent reinforcing bars.
[0046] The upper and lower measuring heads 7 adopt a long strip design to increase the contact length with the reinforcing bars and ensure stable contact with the surface of the reinforcing bars during measurement; the cross-section is wedge-shaped (tip angle 30°), which can probe into the gaps between the reinforcing bars through a smaller contact area and reduce interference with the surrounding reinforcing bars.
[0047] In summary, the wedge-shaped tip can reach into narrow spaces inaccessible to traditional calipers, eliminating blind spots and making it particularly suitable for inspecting densely reinforced areas such as shear walls and beam-column joints, thus improving the coverage of inspection scenarios. The elongated design reduces relative slippage between the measuring head and the reinforcing bars, and the rigid connection structure ensures that the spacing between the measuring heads matches the actual spacing between the reinforcing bars, further reducing measurement errors.
[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A testing device for concrete inspection that can measure the spacing of reinforcing bars, characterized in that, include: The main structure includes a sleeve (1) and a measuring plate (4). The measuring plate (4) is slidably inserted into the sleeve (1). A top plate (5) is provided on the top of the measuring plate (4). An upper measuring head (6) is provided at one end of the top plate (5). A lower measuring head (7) corresponding to the upper measuring head (6) is provided on the upper outer wall of the sleeve (1). The drive structure is located inside the sleeve (1). The drive structure includes a gear (11) and a rack (9). The rack (9) is located on the measuring plate (4). The gear (11) and the rack (9) are meshed. The rotation of the gear (11) can drive the measuring plate (4) to extend and retract from the port of the sleeve (1). The distance between the upper measuring head (6) and the lower measuring head (7) is the measuring distance.
2. The detection device for measuring the spacing of reinforcing bars in concrete testing according to claim 1, characterized in that: The measuring plate (4) has a notch (8) longitudinally, and the rack (9) is set on the inner wall of the notch (8). The gear (11) is located inside the notch (8) and meshes with the rack (9).
3. The detection device for measuring the spacing of reinforcing bars in concrete testing according to claim 2, characterized in that: A motor (10) is installed on the outer wall of the upper end of the sleeve (1). The output end of the motor (10) extends into the inner cavity of the sleeve (1) and is connected to the gear (11) for transmission.
4. A testing device for measuring the spacing of reinforcing bars in concrete testing according to claim 3, characterized in that: The lower end of the sleeve (1) is provided with a base (2), a rechargeable battery is installed inside the base (2), a control button for the forward and reverse rotation of the motor (10) is provided on the outside of the base (2), and a handle (3) is provided at the lower end of the base (2) for the user to hold.
5. A testing device for measuring the spacing of reinforcing bars in concrete testing according to claim 1, characterized in that: A scale (12) is provided at the other end of the top plate (5), and a storage sleeve (13) is provided on the outer wall of the sleeve (1). The scale (12) is slidably inserted into the storage sleeve (13). The upper end of the scale (12) is the zero point. The exposed length of the scale (12) is equal to the distance between the upper measuring head (6) and the lower measuring head (7). The measurement distance can be known by reading the reading on the scale (12).
6. The detection device for measuring the spacing of reinforcing bars in concrete testing according to claim 1, characterized in that: The top port of the sleeve (1) and the top plate (5) are connected by a folding curtain (14) that can extend and retract with the measuring plate (4) to prevent external dust and impurities from damaging the gear (11) and rack (9).
7. A testing device for measuring the spacing of reinforcing bars in concrete testing according to claim 1, characterized in that: Both the upper measuring head (6) and the lower measuring head (7) are long strips with wedge-shaped cross sections, making it convenient for users to probe into narrow spaces to measure the spacing between adjacent reinforcing bars.