Caliper for measuring steel bar protective layer

Abstract

The utility model relates to the technical field of calipers, and discloses a caliper for measuring a steel bar protective layer, which comprises a main ruler, a strip-shaped groove is arranged on the main ruler, a fixed plate is fixedly connected to the inner wall of the strip-shaped groove, a threaded rod is rotatably connected to the fixed plate, one end of the threaded rod is in threaded connection with a movable plate, and the movable plate is in threaded connection with the strip-shaped groove. According to the utility model, the surface of concrete is ensured to be flat, then a proper measuring point is selected on a concrete member according to needs, the main ruler is flatly attached to the measuring point, then the rotating plate is rotated to drive the threaded rod to rotate, and at the moment, the threaded rod rotates on the fixed plate; at the moment, it is ensured that the main ruler makes close contact with the concrete surface, the scales on the main ruler are observed, the measured value of the thickness of the protective layer is recorded, rapid measurement can be achieved in a narrow space, and compared with a measurement method of a traditional steel ruler, the caliper can remarkably improve the detection efficiency and reduce labor intensity.

Description

TECHNICAL FIELD

[0001] The utility model relates to calliper technology field, specifically is a calliper for measuring reinforcing steel bar protective layer. BACKGROUND

[0002] The reinforcing steel bar protective layer refers to a layer of concrete wrapped outside the reinforcing steel bar in the reinforced concrete structure, which protects the reinforcing steel bar. Specifically, the reinforcing steel bar protective layer refers to the minimum distance between the surface of the concrete and the outer edge of the reinforcing steel bar with the nominal diameter in the concrete member. For post-tensioned prestressed reinforcement, the protective layer thickness refers to the distance from the outer edge of the sleeve or duct to the surface of the concrete. The concrete has a certain alkalinity, which can form a passivation film on the surface of the reinforcing steel bar wrapped therein to prevent the corrosion process of the reinforcing steel bar. The thicker the protective layer, the more effectively it can isolate the environmental factors that cause the reinforcing steel bar to corrode. The protective layer can achieve high adhesive strength between the reinforcing steel bar and the concrete, ensuring that the reinforcing steel bar can transmit uniform force to the concrete through the protective layer to jointly bear the load. If the protective layer thickness is insufficient, it may cause cracks to appear prematurely, affecting the safety and durability of the structure. The reinforcing steel bar protective layer is an indispensable part of the reinforced concrete structure, which is of great significance to the protection of the reinforcing steel bar, the good adhesion between the reinforcing steel bar and the concrete, and the improvement of the durability and safety of the structure.

[0003] A calliper for measuring the reinforcing steel bar protective layer is a portable measuring tool specially designed for accurately measuring the thickness of the reinforcing steel bar protective layer in the reinforced concrete structure. The reinforcing steel bar protective layer refers to the minimum distance between the surface of the concrete and the outer edge of the reinforcing steel bar with the nominal diameter in the concrete member. The calliper for measuring the reinforcing steel bar protective layer is a high-efficiency and accurate measuring tool, which is of great significance to the safety and durability of the building structure. In building engineering, measurement and control should be strictly carried out in accordance with relevant standards and specifications to ensure that the thickness of the reinforcing steel bar protective layer meets the design requirements. The existing measurement of the reinforcing steel bar protective layer generally uses a steel ruler. The steel ruler is easy to break and rust when exposed to a humid environment for a long time. After rusting, the scale surface becomes unclear, affecting the accuracy of the reading. The operation is not convenient, the measurement efficiency is low, and the steel ruler needs to be repeatedly moved and adjusted, resulting in low measurement efficiency and reading error. Moreover, it is not convenient to use the steel ruler for measurement in a small space, which reduces the work efficiency and practicability. SUMMARY

[0004] The utility model aims at providing a calliper for measuring the reinforcing steel bar protective layer to solve the problem of using a steel ruler to measure the reinforcing steel bar protective layer, which is easy to break and rust when exposed to a humid environment for a long time.

[0005] In order to realize the above-mentioned utility model purposes, the utility model adopts the following technical scheme: a caliper for measuring the reinforcement cover layer, including the main ruler, the strip-shaped groove is set on the main ruler, the inner wall of the strip-shaped groove is fixedly connected with the fixed plate, the threaded rod is rotatably connected with the fixed plate on the fixed plate, the threaded rod is threadedly connected with the moving plate on one end of the threaded rod, the other end of the threaded rod is fixedly connected with the rotating plate.

[0006] Preferably, the threaded hole is set on the moving plate, and the connecting plate is fixedly connected to the bottom surface of the moving plate.

[0007] Preferably, the vernier scale is arranged on the main ruler, the vernier scale is slidably connected with the main ruler, and the square-shaped groove is formed in the vernier scale.

[0008] Preferably, the first inner measuring claw is fixedly connected to one side of the vernier scale, and the fastening screw is fixedly connected to the other side of the vernier scale.

[0009] Preferably, the second inner measuring claw is fixedly connected to one side of the main ruler, and the outer measuring claw is fixedly connected to the other side of the main ruler.

[0010] Preferably, the handle is fixedly connected to the bottom surface of the main ruler, and the sliding groove is formed in the vernier scale.

[0011] Compared with the prior art, the caliper for measuring the reinforcement cover layer adopting the above technical scheme has the following beneficial effects:

[0012] First, in the utility model, by ensuring that the concrete surface is flat, then selecting appropriate measuring points on the concrete member according to needs, the main ruler is flatly attached to the measuring points, then the rotating plate is rotated to drive the threaded rod to rotate, at this time, the threaded rod rotates on the fixed plate, then the moving plate threadedly connected to one end of the threaded rod starts to move, at this time, the moving plate drives the connecting plate to move, then the connecting plate drives the vernier scale to move, at this time, the vernier scale drives the first inner measuring claw to move, then the vernier scale slides on the main ruler, the second inner measuring claw and the first inner measuring claw are adjusted to the same position, at this time, the main ruler is ensured to be in close contact with the concrete surface, the scale on the main ruler is observed, the measured value of the cover layer thickness is recorded, the cover layer thickness can be quickly measured in a small space, compared with the measurement method of the traditional steel ruler, the caliper can significantly improve the detection efficiency, reduce the labor intensity, be beneficial to long-time work, the structure is easy to use, the precision is further improved, the flexibility is improved, the operation is convenient, time and labor are saved, it is convenient and fast, time is saved, the application range is strengthened, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front perspective structure schematic view of the embodiment;

[0014] Figure 2The back perspective structure schematic view of the embodiment;

[0015] Figure 3 The explosion structure schematic view of the embodiment;

[0016] Figure 4 The structure schematic view of the embodiment at the vernier scale.

[0017] In the figure: 1, main ruler; 2, strip-shaped groove; 3, fixed plate; 4, threaded rod; 5, moving plate; 6, threaded hole; 7, connecting plate; 8, vernier scale; 9, square groove; 10, first inner measuring claw; 11, second inner measuring claw; 12, fastening screw; 13, outer measuring claw; 14, handle; 15, rotating plate. DETAILED DESCRIPTION

[0018] The preferred embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0019] As Figures 1-4 shown, a caliper for measuring the steel bar protective layer, including main ruler 1, the main ruler 1 is set with strip-shaped groove 2, the inner wall of strip-shaped groove 2 is fixedly connected with fixed plate 3, and the fixed plate 3 is rotatably connected with threaded rod 4, one end of threaded rod 4 is threadedly connected with moving plate 5, the other end of threaded rod 4 is fixedly connected with rotating plate 15, threaded hole 6 is set in moving plate 5, the bottom surface of moving plate 5 is fixedly connected with connecting plate 7, vernier scale 8 is arranged on main ruler 1, and vernier scale 8 is slidably connected with main ruler 1, square groove 9 is set in vernier scale 8, one side of vernier scale 8 is fixedly connected with first inner measuring claw 10, the other side of vernier scale 8 is fixedly connected with fastening screw 12, one side of main ruler 1 is fixedly connected with second inner measuring claw 11, the other side of main ruler 1 is fixedly connected with outer measuring claw 13, the bottom surface of main ruler 1 is fixedly connected with handle 14, and sliding groove is set in vernier scale 8.

[0020] In use, by ensuring that the concrete surface is flat, then according to the needs of the concrete member on the selected appropriate measuring points, the main ruler 1 is pasted to the measuring point, and then the rotating plate 15 is rotated to drive the threaded rod 4 to rotate, at this time the threaded rod 4 rotates on the fixed plate 3, then the threaded connection of one end of the threaded rod 4 moves the moving plate 5 to start moving, at this time the moving plate 5 drives the connecting plate 7 to move, then the connecting plate 7 drives the vernier 8 to move, at this time the vernier 8 drives the first inner measuring claw 10 to move, then the vernier 8 slides on the main ruler 1, the second inner measuring claw 11 and the first inner measuring claw 10 are adjusted to the position, at this time the main ruler 1 is ensured to be in close contact with the concrete surface, the scale on the main ruler 1 is observed, the measured value of the protective layer thickness is recorded, the fast measurement in a small space is realized, compared with the measurement method of the traditional steel ruler, the use of the caliper can significantly improve the detection efficiency, reduce the labor intensity, and is beneficial to long-time work, the structure is easy to use, further improves the accuracy, improves the flexibility, is convenient to operate, saves time and effort, is convenient and fast, saves time, and strengthens the application range and improves the work efficiency.

[0021] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A calliper for measuring the cover of a reinforcing bar comprising a main scale (1) characterised in that: The main ruler (1) is provided with a strip-shaped slot (2), the inner wall of the strip-shaped slot (2) is fixedly connected with a fixed plate (3), the fixed plate (3) is rotatably connected with a threaded rod (4), one end of the threaded rod (4) is threadedly connected with a moving plate (5), and the other end of the threaded rod (4) is fixedly connected with a rotating plate (15).

2. The caliper for measuring the cover depth according to claim 1, wherein: The moving plate (5) is provided with a threaded hole (6), and the bottom surface of the moving plate (5) is fixedly connected with a connecting plate (7).

3. The caliper for measuring the cover depth according to claim 1, wherein: The main ruler (1) is provided with a vernier (8), the vernier (8) is slidably connected with the main ruler (1), and the vernier (8) is provided with a square slot (9).

4. The caliper for measuring the cover depth according to claim 3, wherein: One side of the vernier (8) is fixedly connected with a first inner measuring claw (10), and the other side of the vernier (8) is fixedly connected with a fastening screw (12).

5. The caliper for measuring the cover depth according to claim 1, wherein: One side of the main ruler (1) is fixedly connected with a second inner measuring claw (11), and the other side of the main ruler (1) is fixedly connected with an outer measuring claw (13).

6. The caliper for measuring the cover depth according to claim 3, wherein: The bottom surface of the main ruler (1) is fixedly connected with a handle (14), and the vernier (8) is provided with a sliding groove.

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