Dry-type leveling method and device for pressure-bearing surface of concrete test block

Abstract

The invention discloses a dry-type leveling method and device for a pressure-bearing surface of a concrete test block. The method comprises the following steps: transferring the demolded concrete test block into a negative pressure bin; detecting the flatness of the pressure-bearing surface of the concrete test block through a thickness detection module communicated into the negative pressure bin, and identifying the position and thickness of burrs protruding out of the pressure-bearing surface; a sand blasting pipe of a sand blasting machine is communicated with the interior of the negative pressure bin in an angle-adjustable mode, the sand blasting machine controls the sand blasting amount and the spraying pressure according to the positions and the thicknesses of the burrs, the sand blasting pipe is controlled to be aligned with the positions of the burrs to conduct sand blasting and burr removal, and the pressure bearing face of the concrete test block is leveled; the sand scattered in the negative pressure bin and the removed burrs are subjected to negative pressure recovery through a negative pressure pipe; and taking out the concrete test block after the pressure-bearing surface is leveled from the negative pressure bin. The pressure-bearing surface of the concrete test block is leveled in a dry environment, and the influence of leveling treatment on the pressure-bearing surface of the concrete test block in a wet environment on compressive strength detection of the concrete test block is avoided.

Description

Technical Field

[0001] This invention relates to the field of building component testing, and in particular to a method and apparatus for dry leveling the bearing surface of a concrete test block. Background Technology

[0002] Concrete test blocks require compressive strength testing using a mechanical testing machine. This machine applies pressure to the bearing surface of the concrete test block to conduct a crushing and destructive test, determining the compressive strength. However, a drawback is that burrs and other protrusions may appear on the bearing surface after demolding. To ensure the flatness of this surface and allow the mechanical testing machine to cover the bearing surface during testing, and to avoid point pressure due to burrs affecting the compressive strength test, the bearing surface needs to be leveled. Leveling this surface using an angle grinder to remove burrs generates a lot of dust, and existing milling equipment requires coolant, creating a humid environment that can negatively impact the compressive strength testing. Summary of the Invention

[0003] The purpose of this invention is to provide a method and apparatus for dry leveling the bearing surface of concrete test blocks, so as to solve the problems of excessive dust during leveling with angle grinders and the influence of wet environment on the compressive strength testing of concrete test blocks caused by wet leveling.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a method for dry leveling the bearing surface of a concrete test block, comprising: The demolded concrete test blocks were transferred to the negative pressure chamber. The flatness of the bearing surface of the concrete test block is detected by a thickness detection module connected to the negative pressure chamber, and the location and thickness of burrs protruding from the bearing surface are identified. The adjustable angle of the sandblasting pipe of the sandblasting machine is connected to the negative pressure chamber. The sandblasting machine controls the sandblasting volume and spraying pressure according to the location and thickness of the burrs. By controlling the sandblasting pipe to aim at the burr location, the burrs are removed and the bearing surface of the concrete test block is leveled. The sand and burrs scattered in the negative pressure chamber are recovered under negative pressure through a negative pressure pipe connected to the negative pressure chamber. The concrete test block with the pressure-bearing surface leveled was taken out of the negative pressure chamber.

[0005] Furthermore, the dry leveling method for the bearing surface of concrete test blocks provided by the present invention further includes: After sandblasting the bearing surface of the concrete test block to remove burrs, the flatness of the bearing surface is checked a second time by the thickness detection module. If there are still burrs protruding from the surface of the bearing surface, the bearing surface is sandblasted a second time to remove the burrs.

[0006] Furthermore, in the dry leveling method for the bearing surface of concrete test blocks provided by the present invention, the sand material loaded in the sandblasting machine is Al2O3 particles.

[0007] Furthermore, in the dry leveling method for the bearing surface of concrete test blocks provided by the present invention, the particle size of the Al2O3 particles is 0.2 mm.

[0008] To solve the above-mentioned technical problems, another technical solution of the present invention is: a dry leveling device for the bearing surface of a concrete test block using the above-mentioned dry leveling method for the bearing surface of a concrete test block, comprising a negative pressure chamber and its controller, wherein the negative pressure chamber is connected to a negative pressure pipe, and further comprising a thickness detection module connected to the negative pressure chamber, an adjustable angle sandblasting pipe connected to the negative pressure chamber, the sandblasting pipe being connected to a sandblasting machine, and the thickness detection module and the sandblasting machine being respectively connected to the controller.

[0009] Furthermore, in the dry leveling device for the bearing surface of the concrete test block provided by the present invention, the thickness detection module is a laser displacement sensor.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a method and apparatus for dry leveling of the bearing surface of concrete test blocks. After demolding, the concrete test block is transferred to a negative pressure chamber. A thickness detection module detects the flatness of the bearing surface, identifying the location and thickness of any protruding burrs. A sandblasting machine is used to remove the burrs by blasting the bearing surface, thus leveling the surface. Furthermore, a negative pressure pipe connected to the chamber recovers the sand and burrs scattered within it. This method achieves leveling of the bearing surface in a dry environment, avoiding the impact of leveling in a wet environment on the compressive strength testing of the concrete test block. It also eliminates dust particle leakage, reducing the impact on the health of workers. Attached Figure Description

[0011] Figure 1 This is a flowchart of the dry leveling method for the bearing surface of concrete test blocks; Figure 2 This is a schematic diagram of a dry leveling device for the bearing surface of a concrete test block. Figure 3 This is a control principle diagram of a dry leveling device for the bearing surface of concrete test blocks; The diagram shows: 1. Negative pressure chamber, 2. Negative pressure pipe, 3. Thickness detection module, 4. Sandblasting pipe, 5. Concrete test block, 6. Controller, 7. Sandblasting machine. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0013] Please refer to Figure 1 This invention provides a method for dry leveling the bearing surface of a concrete test block, which may include: Step S101: Transfer the demolded concrete test block 5 to the negative pressure chamber 1.

[0014] Step S102: The flatness of the bearing surface of the concrete test block 5 is detected by the thickness detection module 3 connected to the negative pressure chamber 1, and the location and thickness of the burrs protruding from the bearing surface are identified.

[0015] In step S103, the adjustable angle of the sandblasting pipe 4 of the sandblasting machine 7 is connected to the negative pressure chamber 1. The sandblasting machine 7 controls the sandblasting volume and spraying pressure according to the location and thickness of the burr, and controls the sandblasting pipe 4 to aim at the burr location to remove the burr and level the bearing surface of the concrete test block 5. The flatness of the bearing surface of the concrete test block 5 can be controlled to a height difference ≤ 0.05 mm. For example, for the treatment of a certain burr, the spraying air pressure of the sandblasting machine 7 is controlled at 0.3±0.05 MPa, and the spraying speed is controlled at 50-70 m / s. The sandblasting pipe 4 can be connected to the shell of the negative pressure chamber 1 by a ball joint, and a rubber sleeve is set at the ball joint connection for sealing. At this time, the sandblasting pipe 4 can be adjusted within a 360° range. The sandblasting pipe 4 can be equipped with a nozzle with an adjustable angle within a fan angle range of 15°–45°.

[0016] Step S104: The sand and burrs scattered in the negative pressure chamber 1 are recovered under negative pressure through the negative pressure pipe connected in the negative pressure chamber 1.

[0017] Step S105: Remove the concrete test block 5, after leveling the bearing surface, from the negative pressure chamber 1.

[0018] Please refer to Figure 1 To improve the leveling effect, the dry leveling method for the bearing surface of concrete test blocks provided in this embodiment of the invention may further include: Repeat steps S102 to S104, that is, after sandblasting the bearing surface of the concrete test block 5 to remove burrs, the flatness of the bearing surface is checked a second time by the thickness detection module 3. When there are still burrs protruding from the surface of the bearing surface, the bearing surface is sandblasted a second time by the sandblasting machine 7 to remove the burrs, and then the sand and the removed burrs are recycled under negative pressure.

[0019] To improve the cutting and grinding capabilities of the sandblasting process on the bearing surface of concrete specimen 5, this embodiment of the invention provides a dry leveling method for the bearing surface of concrete specimens. The sand material loaded in the sandblasting machine 7 is Al2O3 (alumina) particles with a particle size of 0.2 mm. Al2O3 particles have high hardness, which allows them to effectively cut and grind the material surface during sandblasting, effectively removing dirt, grease, oxides, impurities, and other adhering protrusions from the surface of the concrete specimen 5. Furthermore, Al2O3 is a relatively chemically stable substance and does not readily react chemically with the surface material of the concrete specimen 5.

[0020] Please refer to Figures 2 to 3 This invention also provides a dry leveling device for the bearing surface of a concrete test block 5 using the aforementioned dry leveling method. The device includes a negative pressure chamber 1 and a controller 6. The negative pressure chamber 1 is connected to a negative pressure pipe 2. It also includes a thickness detection module 3 connected within the negative pressure chamber 1 and an adjustable-angle sandblasting pipe 4 connected within the negative pressure chamber 1. The sandblasting pipe 4 is connected to a sandblasting machine 7. The thickness detection module 3 and the sandblasting machine 7 are respectively connected to the controller 6. The controller 6 can control the negative pressure environment, such as the negative pressure airflow, within the negative pressure chamber 1. The sandblasting machine 7 is located outside the negative pressure chamber 1. The thickness detection module 3 can be a laser displacement sensor.

[0021] The dry leveling method and apparatus for the bearing surface of concrete test block 5 provided in this embodiment of the invention involves transferring the demolded concrete test block 5 into a negative pressure chamber 1. The flatness of the bearing surface of the concrete test block 5 is detected by a thickness detection module 3, identifying the location and thickness of burrs protruding from the bearing surface. The burrs are removed by sandblasting using the sandblasting pipe 4 of a sandblasting machine 7, thus leveling the bearing surface of the concrete test block 5. Furthermore, the sand and removed burrs scattered within the negative pressure chamber 1 are recovered under negative pressure through a negative pressure pipe 2 connected to the negative pressure chamber 1. This achieves leveling of the bearing surface of the concrete test block 5 in a dry environment, avoiding the impact of leveling the bearing surface of the concrete test block 5 in a wet environment on the compressive strength testing of the concrete test block 5. It also eliminates the generation of dust particles exposed indoors, reducing the impact on the health of workers.

[0022] The dry leveling method and apparatus for the bearing surface of concrete test block 5 provided in this embodiment of the invention allows the controller 6 to identify the location and thickness data of burrs protruding from the bearing surface based on the thickness detection module 3, and form a spray trajectory for sandblasting machine 7 to sandblast the burr area in a targeted manner, thereby improving the leveling effect on the bearing surface of concrete test block 5 and reducing secondary sandblasting.

[0023] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A method for dry leveling the bearing surface of a concrete test block, characterized in that, The method comprises the following steps: moving the demolded concrete test block to a negative pressure bin; detecting the flatness of the bearing surface of the concrete test block by a thickness detection module connected to the negative pressure bin, and identifying the burr position and thickness protruding from the bearing surface; adjusting the angle of the sand blasting pipe of the sand blasting machine to be connected to the negative pressure bin, and controlling the sand blasting amount and blasting pressure of the sand blasting machine according to the burr position and thickness to remove the burr by controlling the sand blasting pipe to aim at the burr position, and performing the leveling treatment on the bearing surface of the concrete test block; recycling the sand and removed burr in the negative pressure bin by a negative pressure pipe connected to the negative pressure bin; taking out the concrete test block with the bearing surface leveled from the negative pressure bin.

2. The method of dry screeding a concrete test block bearing surface of claim 1, wherein, The method further comprises the following steps: after removing the burr on the bearing surface of the concrete test block by sand blasting, detecting the flatness of the bearing surface again by the thickness detection module, and removing the burr on the bearing surface again by the sand blasting machine when the burr still exists on the surface of the bearing surface.

3. The method of dry screeding a concrete pad according to claim 1, wherein, The sand in the sand blasting machine is Al2O3 particles.

4. The method of dry screeding a concrete pad according to claim 1, wherein, The particle size of the Al2O3 particles is 0.2 mm.

5. A concrete block bearing surface dry leveling device using the concrete block bearing surface dry leveling method according to any one of claims 1 to 6, characterized by The method comprises the following steps:

6. The apparatus of claim 5, wherein the apparatus further comprises a plurality of rollers disposed between the first and second belts. The method comprises the following steps: The thickness detection module is a laser displacement sensor.

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