Magnetic type limiting stopper for cement anti-bending test piece

Abstract

The utility model discloses a magnetic stopper for a cement anti-bending test piece, and belongs to the technical field of cement anti-bending test auxiliary instruments. The limiter comprises a supporting plate, a magnetic attraction assembly is arranged at one end of the supporting plate, and a baffle is arranged at the other end of the supporting plate. Through the two magnetic type limiters, the cement anti-bending test piece can be quickly and geometrically centered in the length direction, so that the whole test piece is stressed at a central point, the load is uniformly distributed in the width direction of the test piece, the accuracy of a test result is ensured, and meanwhile, a better test piece condition is provided for a next compression test.

Description

Technical Field

[0001] The utility model relates to a magnetic stopper for a cement flexural test piece and belongs to the technical field of cement flexural test auxiliary equipment. Background Art

[0002] According to the "Test Method for Cement Mortar Strength (ISO Method)" (GB / T17671-2021), the flexural strength of cement mortar strength specimens is tested using the three-point loading method, in which the center distance between the two support columns is 100mm±0.1mm, and the distance between the two support columns and the edge of the specimen is ≈30mm, which means that the cement mortar strength specimen should be geometrically centered under pressure during the test. At present, hydraulic testing machines are often used for loading. However, since there is no infinite position device on the flexural fixture of the cement flexural and compression integrated machine, the test is only based on the naked eye observation of the test personnel to see whether the specimen is geometrically centered. If the specimen is placed to the right or to the left, the length of the broken prism will be different. When the prism is shorter (<45mm) after breaking, it will affect the cement mortar compressive strength test, thereby affecting the cement strength test results. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a magnetic stopper for a cement flexural test piece.

[0004] The utility model is realized through the following technical solutions:

[0005] A magnetic stopper for a cement flexural test piece comprises a support plate, one end of the support plate is provided with a magnetic assembly, and the other end of the support plate is provided with a baffle.

[0006] The limiter is in a Z shape as a whole, and the support plate is perpendicular to the baffle and the magnetic attraction component.

[0007] The magnetic attraction component is a magnetic attraction strip, one end of which is connected to one end of the support plate.

[0008] The magnetic attraction strip is made of permanent magnet.

[0009] The length of the magnetic strip is not less than 20 mm.

[0010] One end of the baffle is connected to one end of the support plate, and the length of the baffle is not less than 50 mm.

[0011] The beneficial effect of the utility model is that the cement flexural test piece can be quickly geometrically aligned in the length direction through two magnetic limiters, so that the entire test piece is subjected to force at the center point, and the load is evenly distributed along the width direction of the test piece, thereby ensuring the accuracy of the test results and providing better test piece conditions for the next compression test. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure after the utility model is installed on the anti-bending clamp of the cement anti-bending and anti-compression integrated machine.

[0015] In the figure: 1- baffle, 2- support plate, 3- magnetic suction component, 4- anti-bending clamp. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0017] like Figures 1 to 3 As shown, a magnetic stopper for cement flexural test piece described in the utility model comprises a support plate 2, a magnetic attraction component 3 is installed at one end of the support plate 2, and a baffle 1 is installed at the other end.

[0018] The limiter is in a Z shape as a whole, and the support plate 2 is perpendicular to the baffle 1 and the magnetic attraction component 3 .

[0019] The magnetic attraction component 3 is a magnetic attraction strip, one end of which is connected to one end of the support plate 2 .

[0020] The magnetic attraction strip is made of permanent magnet.

[0021] The length of the magnetic strip is not less than 20 mm.

[0022] One end of the baffle 1 is connected to one end of the support plate 2, and the length of the baffle 1 is not less than 50 mm. When in use, the baffle 1 is used to position the end face of the specimen; the baffle 1 and the support plate 2 are integrally manufactured and can be made of any non-deformable material, such as plastic or iron. The length of the support plate 2 is determined according to half of the difference between the length of the specimen and the length of the anti-bending fixture 4.

[0023] The working principle or use process of the magnetic stopper for cement flexural test piece described in the utility model is as follows:

[0024] like Figure 3As shown, before conducting the flexural strength test of cement mortar specimens, take two magnetic stoppers, and adsorb them on both sides of the flexural fixture 4 through magnetic strips. After taking out the specimens that have been cured to the age from the curing box, place them on the flexural fixture, and use the baffles 1 in the two magnetic stoppers to position the end faces of the specimens. The specimens can be quickly geometrically aligned in the length direction, and the cement flexural and compression integrated machine is started to start the test. After the three flexural specimens are tested, remove the two magnetic stoppers and clean them up. At the same time, it can also prevent the magnetic stoppers from interfering with other tests. The magnetic stoppers can be reused and can be adsorbed on the flexural fixture 4 again through the magnetic strips before the next flexural test.

Claims

1. A magnetic stopper for cement flexural test piece, characterized in that: It comprises a support plate (2), one end of the support plate (2) is provided with a magnetic attraction component (3), and the other end of the support plate (2) is provided with a baffle (1); The stopper is in a Z shape as a whole, and the support plate (2) is perpendicular to the baffle plate (1) and the magnetic attraction component (3); The magnetic attraction component (3) is a magnetic attraction strip, one end of which is connected to one end of the support plate (2).

2. The magnetic stopper for cement flexural test piece according to claim 1, characterized in that: The magnetic attraction strip is made of permanent magnet.

3. The magnetic stopper for cement flexural test piece according to claim 1, characterized in that: The length of the magnetic strip is not less than 20 mm.

4. The magnetic stopper for cement flexural test piece according to claim 1, characterized in that: One end of the baffle plate (1) is connected to one end of the support plate (2), and the length of the baffle plate (1) is not less than 50 mm.

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