High-precision concrete self-compacting J-shaped ring

Abstract

The utility model discloses a high-precision concrete self-compacting J-shaped ring, and relates to the technical field of concrete testing, a J-shaped ring body is slidably connected with a sliding part, the sliding part is horizontally provided with a first fixing rod, the first fixing rod is slidably connected with a laser module, and a fixing clamp is clamped and fixed on the J-shaped ring body. A second fixing rod is horizontally arranged on the fixing clamp, a diffuse reflection type photoelectric sensor is vertically arranged at one end of the second fixing rod, a timing module and a mirror reflection type photoelectric sensor which is horizontally arranged are arranged at the other end of the second fixing rod, and the diffuse reflection type photoelectric sensor and the mirror reflection type photoelectric sensor are both electrically connected with the timing module; and the J-shaped ring body is also provided with a light reflecting plate. The device does not depend on a concrete expansion flow meter for measurement, so that measurement can be carried out on any conditional construction site, a measurement result can be quickly obtained to help timely adjustment of site construction, and meanwhile, each structure can be detached, so that transportation and flexible use are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete testing, and more specifically, to a high-precision self-compacting concrete J-ring. Background Art

[0002] The determination of self-compacting concrete is carried out with reference to JGJ / T 283-2012 "Standard Test Method for Self-Compacting Concrete". This standard is applicable to self-compacting concrete prepared with ordinary Portland cement, mineral admixtures and chemical admixtures. When the traditional method uses a J-ring to measure the slump flow diameter, t500 spread time and flow time of self-compacting concrete, the measured spread radius is not precise enough, and the t500 spread time is easily affected by human factors, resulting in errors in the results. And the determination generally needs to be carried out indoors and relies on a concrete spreading flow meter to measure, and cannot be measured on site, which makes it difficult to quickly obtain the test results and is not conducive to the timely adjustment of on-site construction. Summary of the Utility Model

[0003] In order to overcome the defects of the prior art, the utility model provides a high-precision self-compacting concrete J-ring, which does not rely on a concrete spreading flow meter for measurement. Therefore, it can be measured at any construction site with conditions, and the measurement results can be quickly obtained to help the timely adjustment of on-site construction. At the same time, each structure can be disassembled, which is convenient for transportation and flexible use, and does not affect the cleaning of the J-ring body. The measurement results are accurate and less affected by humans.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a high-precision self-compacting concrete J-ring, which includes a J-ring body, and a first test mechanism for testing the slump flow diameter and / or a second test mechanism for testing the t500 spread time and flow time. The first test mechanism includes a sliding part, a first fixing rod and a laser module. The sliding part is slidably connected to the J-ring body. The first fixing rod is horizontally arranged on the sliding part. The laser module is slidably connected to the first fixing rod. The second test mechanism includes a fixing fixture, a second fixing rod, a diffuse reflection photoelectric sensor, a timing module, a specular reflection photoelectric sensor and a reflector. The fixing fixture is clamped and fixed on the J-ring body. The second fixing rod is horizontally arranged on the fixing fixture. One end of the second fixing rod is vertically provided with the diffuse reflection photoelectric sensor. The other end of the second fixing rod is provided with the timing module and the specular reflection photoelectric sensor arranged horizontally. And both the diffuse reflection photoelectric sensor and the specular reflection photoelectric sensor are electrically connected to the timing module. A reflector cooperating with the specular reflection photoelectric sensor is also arranged on the J-ring body.

[0006] In a preferred technical solution of the present utility model, the sliding part includes an annular guide rail, a sliding seat and adjustable rollers. The annular guide rail is fixedly arranged on the J-shaped ring body. The bottom of the sliding seat is provided with adjustable rollers, and the adjustable rollers are in rolling connection with the annular guide rail. The first fixing rod is connected to the sliding seat.

[0007] In a preferred technical solution of the present utility model, the cross-section of the annular guide rail is T-shaped.

[0008] In a preferred technical solution of the present utility model, the first fixing rod is provided with scale lines.

[0009] In a preferred technical solution of the present utility model, the reflector is composed of a mirror surface and a magnet.

[0010] The beneficial effects of the present utility model are as follows:

[0011] The high-precision self-compacting concrete J-shaped ring proposed by the present utility model does not rely on a concrete spreading flow meter for measurement. Therefore, it can be measured at any construction site with conditions, and the measurement results can be obtained quickly to help adjust the on-site construction in a timely manner. At the same time, each structure can be disassembled, which is convenient for transportation and flexible use, and does not affect the cleaning of the J-shaped ring body. The measurement results are accurate and less affected by humans. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the J-shaped ring body in Embodiment 1;

[0013] Figure 2 is a schematic structural diagram of the first test mechanism in Embodiment 1;

[0014] Figure 3 is a schematic installation structure diagram of the first test mechanism and the J-shaped ring body in Embodiment 1;

[0015] Figure 4 is a schematic installation structure diagram of the second test mechanism and the J-shaped ring body in Embodiment 2;

[0016] Figure 5 is a schematic structural diagram of the second test mechanism in Embodiment 2.

[0017] In the figure:

[0018] 1. J-shaped ring body; 2. First test mechanism; 21. Sliding part; 211. Annular guide rail; 212. Sliding seat; 213. Adjustable rollers; 22. First fixing rod; 23. Laser module; 3. Second test mechanism; 31. Fixed fixture; 32. Second fixing rod; 33. Diffuse reflection type photoelectric sensor; 34. Timing module; 35. Specular reflection type photoelectric sensor; 36. Reflector. Detailed Embodiments

[0019] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0020] Embodiment 1

[0021] As Figures 1 - 3 shown, a high-precision self-compacting concrete J-ring is provided in the embodiment, including a J-ring body 1 and a first testing mechanism 2 for testing the slump flow. The first testing mechanism 2 includes a sliding part 21, a first fixing rod 22 and a laser module 23. The sliding part 21 is slidably connected to the J-ring body 1. A first fixing rod 22 is horizontally arranged on the sliding part 21, and the laser module 23 is slidably connected to the first fixing rod 22. In this embodiment, the J-ring body 1 is a circular ring structure with a radius of 150 mm. The first testing mechanism 2 and the J-ring body 1 are detachably connected, which is convenient for transportation and flexible use, and does not affect the cleaning of the J-ring body 1. Among them, the provided sliding part 21 can drive the first fixing rod 22 and the laser module 23 to rotate circumferentially around the central axis of the J-ring body 1, so as to realize the measurement of the diffusion radius of self-compacting concrete at 360 degrees and realize the measurement of the diffusion radius at different positions for multiple times; the first fixing rod 22 needs to always remain horizontal during the rotation process to ensure the measurement accuracy; the laser module 23 can emit a vertically downward laser, and by aligning the laser with the edge of the diffused concrete, the accurate measurement of the diffusion radius can be realized.

[0022] Specifically, the sliding part 21 includes an annular guide rail 211, a sliding seat 212 and adjustable rollers 213. The annular guide rail 211 is fixed on the J-ring body 1. Adjustable rollers 213 are arranged at the bottom of the sliding seat 212, and the adjustable rollers 213 are in rolling connection with the annular guide rail 211. The first fixing rod 22 is connected to the sliding seat 212. In this embodiment, the annular guide rail 211 and the J-ring body 1 are coaxially arranged, and the annular guide rail 211 and the J-ring body 1 are detachably fixedly connected, which is convenient to detach the entire sliding part 21 when the device is not in use, thereby separating the first testing mechanism 2 from the J-ring body 1 to reduce the overall volume of the device and facilitate transportation and storage operations. The sliding seat 212 is located above the annular guide rail 211, and when the sliding seat 212 is installed, it should be ensured that it does not come into contact with the annular guide rail 211 to reduce friction. At the same time, with the cooperation of the adjustable rollers 213, the sliding seat 212 can slide on the annular guide rail 211.

[0023] Specifically, the cross-section of the annular guide rail 211 is T-shaped. In this embodiment, adjustable rollers 213 are arranged on both the inner and outer sides of the annular guide rail 211, and the adjustable rollers 213 are clamped into the grooves on both the inner and outer sides of the annular guide rail 211 and can roll in the grooves, thereby realizing the fixed installation of the sliding seat 212 on the annular guide rail 211 to prevent the sliding seat 212 from falling off the annular guide rail 211 during use.

[0024] Specifically, scale lines are provided on the first fixing rod 22. In this embodiment, the scale lines range from 150 mm (the radius of the J-ring body 1) to 450 mm, which is used to display the distance from the center of the J-ring body 1 to the edge of the concrete. By setting the scale lines, it is convenient for the staff to visually read the diffusion radius of the concrete and ensure the accuracy of the reading.

[0025] Working principle: When testing the slump flow of concrete, place the J-ring body 1 horizontally, pour the concrete into the slump cone according to the regulations, and fixedly install the first testing mechanism 2 on the J-ring body 1. After making preparations, lift the slump cone, then rotate the sliding part 21 to move the laser module 23 to a suitable position, and control the laser module 23 to slide on the first fixing rod 22 to ensure that the laser emitted by the laser module 23 is aligned with the edge of the diffused concrete, and then read the distance on the scale line. The measurement can be repeated several times to obtain accurate slump flow data. In addition, since the sliding seat 212 can slide on the annular guide rail 211, it is possible to measure the diffusion radius at different positions multiple times.

[0026] Embodiment 2

[0027] As Figures 4 - 5As shown in the figure, a high-precision self-compacting concrete J-ring is provided in the embodiment, including a J-ring body 1 and a second testing mechanism 3 for testing the t500 extension time and flow time. The second testing mechanism 3 includes a fixed fixture 31, a second fixing rod 32, a diffuse reflection type photoelectric sensor 33, a timing module 34, a specular reflection type photoelectric sensor 35 and a reflector 36. The fixed fixture 31 is clamped and fixed on the J-ring body 1. A second fixing rod 32 is horizontally arranged on the fixed fixture 31. One end of the second fixing rod 32 is vertically provided with a diffuse reflection type photoelectric sensor 33, and the other end of the second fixing rod 32 is provided with a timing module 34 and a specular reflection type photoelectric sensor 35 arranged horizontally. Both the diffuse reflection type photoelectric sensor 33 and the specular reflection type photoelectric sensor 35 are electrically connected to the timing module 34. A reflector 36 cooperating with the specular reflection type photoelectric sensor 35 is also arranged on the J-ring body 1. In this embodiment, the second testing mechanism 3 is detachably connected to the J-ring body 1, which is convenient for transportation and flexible use and does not affect the cleaning of the J-ring body 1. Among them, the fixed fixture 31 is detachably fixedly connected to the J-ring body 1, which is convenient for removing the entire second testing mechanism 3 when the device is not in use, so as to reduce the overall volume of the device and facilitate transportation and storage operations; the second fixing rod 32 should be ensured to be in a horizontal state during installation to ensure the measurement accuracy; the diffuse reflection type photoelectric sensor 33 is located at one end of the second fixing rod 32 away from the fixed fixture 31, and the distance from the beam emitted by the diffuse reflection type photoelectric sensor 33 to the center of the J-ring body 1 is fixed at 250 mm; the specular reflection type photoelectric sensor 35 and the reflector 36 are respectively located at both ends of the top surface of the J-ring body 1, and the reflector 36 can reflect the beam of the specular reflection type photoelectric sensor 35.

[0028] Specifically, the reflector 36 is composed of a mirror surface and a magnet. In this embodiment, the mirror surface can be adsorbed and fixed on the J-ring body 1 through the arranged magnet, which helps to reduce the installation and use difficulties.

[0029] Working principle: When testing the t500 extension time and flow time, place the J-ring body 1 horizontally, pour the concrete into the slump cone according to the regulations, and fixedly install the second testing mechanism 3 on the J-ring body 1. After preparation, lift the slump cone. When the slump cone is completely lifted, the specular reflection type photoelectric sensor 35 detects the light reflected by the reflector 36 and recognizes that the slump cone is lifted. At this time, the timing module 34 starts timing. When the concrete spreads to a diameter of 500 mm, it passes through the beam emitted by the diffuse reflection type photoelectric sensor 33 and is recognized, and the time T1 is recorded. T1 is the t500 extension time of the concrete. When the concrete stops flowing, the timing ends, and the time T2 is recorded. T2 is the flow time of the concrete.

[0030] Embodiment 3

[0031] On the basis of Embodiment 2, in this embodiment, the first fixing rod 22 in Embodiment 1 is connected to one end of the second fixing rod 32 away from the J-shaped ring body 1, and the measurement range of the scale line on the first fixing rod 22 is changed to 250 mm to 450 mm. A laser module 23 is slidably connected to the first fixing rod 22, so as to simultaneously measure the slump flow, t500 flow time and flow time of the concrete, and improve the detection efficiency.

[0032] The present utility model is described by way of preferred embodiments. Those skilled in the art will appreciate that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present utility model. The present utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present utility model.

Claims

1. High-precision self-compacting concrete J-ring, characterized in that: It includes a J - ring body (1), a first testing mechanism (2) for testing the slump flow and / or a second testing mechanism (3) for testing the t500 spread time and flow time. The first testing mechanism (2) includes a sliding part (21), a first fixing rod (22) and a laser module (23). The sliding part (21) is slidably connected to the J - ring body (1). A first fixing rod (22) is horizontally arranged on the sliding part (21). The laser module (23) is slidably connected to the first fixing rod (22). The second testing mechanism (3) includes a fixed fixture (31), a second fixing rod (32), a diffuse - reflection photoelectric sensor (33), a timing module (34), a specular - reflection photoelectric sensor (35) and a reflector (36). The fixed fixture (31) is clamped and fixed on the J - ring body (1). A second fixing rod (32) is horizontally arranged on the fixed fixture (31). A diffuse - reflection photoelectric sensor (33) is vertically arranged at one end of the second fixing rod (32). A timing module (34) and a horizontally arranged specular - reflection photoelectric sensor (35) are arranged at the other end of the second fixing rod (32). Both the diffuse - reflection photoelectric sensor (33) and the specular - reflection photoelectric sensor (35) are electrically connected to the timing module (34). A reflector (36) cooperating with the specular - reflection photoelectric sensor (35) is also arranged on the J - ring body (1).

2. The high-precision self-compacting concrete J-ring according to claim 1, wherein: The sliding part (21) includes an annular guide rail (211), a sliding seat (212) and adjustable rollers (213). The annular guide rail (211) is fixed on the J - ring body (1). Adjustable rollers (213) are arranged at the bottom of the sliding seat (212). The adjustable rollers (213) are in rolling connection with the annular guide rail (211). The first fixing rod (22) is connected to the sliding seat (212).

3. The high-precision self-compacting concrete J-ring according to claim 2, characterized in that: The cross - section of the annular guide rail (211) is T - shaped.

4. The high-precision self-compacting concrete J-ring according to claim 1, wherein: Scale lines are arranged on the first fixing rod (22).

5. The high-precision self-compacting concrete J-ring according to claim 1, wherein: The reflector (36) is composed of a mirror and a magnet.

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