CN107632143A - A kind of concrete shrinkage tester - Google Patents

Abstract

The present invention relates to engineering goods technical field, especially a kind of concrete shrinkage tester, including backing plate, one end of backing plate is welded with fixed dam, the side both ends that fixed dam is located at backing plate are welded with apron strip, the one end of apron strip away from fixed dam is provided with slide damper, backing plate both sides are provided with three pairs of supporting plates, slide roller is equipped between each pair supporting plate, the side that slide damper corresponds to fixed dam is welded with slide plate, slide plate, which is taken, to be placed in slide roller, the one end of backing plate away from fixed dam is provided with limiting plate, slide damper is provided with slide post, slide post is set through limiting plate, and slide post is provided with spring, plugged on slide damper and be fixed with displacement meter, displacement meter is connected with data analysis set-up by wire, data analysis set-up is connected with computer by wire.The present invention can significantly improve the reliability of experimental data, and the experiment conclusion drawn has higher value.

Description

A concrete shrinkage tester

technical field

The invention relates to the technical field of mechanical products, in particular to a concrete shrinkage tester.

Background technique

At present, the instruments used to measure the free expansion and contraction of concrete have relatively large defects, among which the friction between the concrete specimen and the external environment is relatively large, resulting in a decrease in the accuracy of the experimental data. The tester for the free expansion and contraction of concrete is in the The installation and unloading of the measuring probe in the course of multiple tests is a troublesome task, and it is easy to damage the measuring probe. During the test process of the free concrete expansion and contraction tester at this stage, the gravity of the concrete specimen will rub against the friction in the vertical direction. If the force is affected, the accuracy of the experimental data will be greatly reduced.

Contents of the invention

The purpose of the present invention is to solve the shortcoming of low accuracy of measurement data in the prior art, and propose a concrete shrinkage tester.

In order to achieve the above object, the present invention adopts the following technical solutions:

A concrete shrinkage tester is designed, comprising a backing plate, one end of the backing plate is vertically welded with a fixed baffle, and the fixed baffle is welded with baffle strips at both ends of one side of the backing plate, the The end of the baffle bar away from the fixed baffle is provided with a sliding baffle, and the position of the sliding baffle corresponding to the two baffle bars is vertically provided with a sliding hole, and the baffle bar is set through the sliding hole, There are three pairs of support plates on both sides of the backing plate and between the fixed baffle and the sliding baffle, the three pairs of support plates are evenly arranged, and sliding rollers are arranged between each pair of support plates. The two ends of the two ends are fixed on the support plate through bearings, and the side of the sliding baffle corresponding to the fixed baffle is welded with a slide plate, and the slide plate is placed on the sliding roller, and the slide plate is far away from the side of the slide baffle. One end is set through the fixed baffle, the end of the backing plate away from the fixed baffle is provided with a limiting plate, and the side of the sliding baffle away from the slide plate is fixed with a sliding column, and the sliding column penetrates the limiting plate. A position plate is provided, a spring is provided between the sliding baffle and the limit plate, and the spring is sleeved on the sliding column, and a through hole is provided on the sliding baffle and above the sliding column. A displacement meter is inserted and fixed in the through hole, and the displacement meter is connected to a data analysis device through a wire, and the data analysis device is connected to a computer through a wire.

Preferably, horizontal adjustment blocks are provided at the four corners of the bottom of the backing plate.

Preferably, a bubble level is provided at the center of the slider, the bubble level is embedded in the slider, and the upper surface of the bubble level is flush with the upper surface of the slider.

Preferably, a data analysis system is provided in the data analysis device, and the data analysis system includes a processor, a data sending module electrically connected to the processor, a power supply module, a data analysis module, a data processing module, an A/ D data conversion module, the A/D data conversion module is electrically connected to a data amplification module, the data amplification module is electrically connected to a data acquisition module, and the data acquisition module is connected to the displacement meter through a wire, so The data sending module and the power module are electrically connected to the computer.

Preferably, each end of the baffle strip is provided with a first limiting block.

Preferably, a second limit block is provided at the end of the slide plate.

Preferably, the surface of the slide plate is a smooth surface structure.

A concrete shrinkage tester proposed by the present invention has the beneficial effect that: the present invention uses slide rollers to support the slide plate, and the frictional force suffered by the concrete in the process of free expansion and contraction changes from sliding friction to rolling friction, thereby eliminating some external factors The level of the test specimen can be adjusted through the horizontal adjustment block at the bottom of the backing plate to ensure that the gravity of the concrete will not affect the shrinkage displacement in the direction of the test measurement, which can significantly improve the reliability of the experimental data. The experimental conclusions are as follows: higher value.

Description of drawings

Fig. 1 is the structural representation of a kind of concrete shrinkage tester that the present invention proposes;

Fig. 2 is the sectional structure schematic diagram of a kind of concrete shrinkage tester that the present invention proposes;

Fig. 3 is a system block diagram of the data analysis device proposed by the present invention.

In the figure: backing plate 1, fixed baffle 2, baffle bar 3, support plate 4, sliding roller 5, sliding baffle 6, sliding hole 7, sliding plate 8, limit plate 9, sliding column 10, spring 11, displacement Meter 12, data analysis device 13, first limit block 14, second limit block 15, level adjustment block 16, bubble level 17.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Referring to Figures 1-3, a concrete shrinkage tester includes a backing plate 1, one end of the backing plate 1 is vertically welded with a fixed baffle 2, and the function of the fixed baffle 2 is that the concrete specimen can no longer expand and shrink freely. This direction changes, and the fixed baffle 2 is welded with baffle strips 3 at both ends of one side of the backing plate 1, and the end of the baffle strip 3 away from the fixed baffle 2 is provided with a sliding baffle 6, and each baffle strip 3 The ends of each are provided with a first stop block 14, and the first stop block 14 plays a position-limiting effect, and the position of the sliding baffle plate 6 corresponding to the two baffle bars 3 is vertically provided with a sliding hole 7, and the baffle bar 3 Set through the sliding hole 7, three pairs of support plates 4 are arranged on both sides of the backing plate 1 and between the fixed baffle 2 and the sliding baffle 6, the three pairs of support plates 4 are evenly arranged, and each pair of support plates 4 is provided with There is a sliding roller 5, and the two ends of the sliding roller 5 are fixed on the support plate 4 through bearings. The function of the sliding roller 5 is that the free expansion and contraction of the concrete is subjected to the type of friction that belongs to rolling friction, and the frictional resistance is reduced, thereby eliminating part of the external Influenced by factors, the accuracy of data measurement is improved. The side of the sliding baffle 6 corresponding to the fixed baffle 2 is welded with a sliding plate 8, the sliding plate 8 is placed on the sliding roller 5, and the end of the sliding baffle 8 away from the sliding baffle 6 runs through The fixed baffle plate 2 is set, and the end of the slide plate 8 is provided with a second limit block 15, which acts as a limit. The surface of the slide plate 8 is a smooth surface structure, and the slide plate 8 has a smooth surface structure, which effectively reduces the Small friction force, the effect of the slide plate 8 is to reduce the friction force received by the free expansion and contraction of concrete in the concrete shrinkage test.

The backing plate 1 is provided with a limiting plate 9 at one end away from the fixed baffle 2, and the side of the sliding baffle 6 away from the sliding plate 8 is fixed with a sliding column 10, and the sliding column 10 is set through the limiting plate 9, and the sliding baffle 6 and the limiting A spring 11 is arranged between the plates 9, and the spring 11 is sleeved on the sliding column 10, and the sliding baffle 6 can measure concrete blocks of different sizes under the action of the spring 11, making the measurement more flexible. After the piece is placed between the fixed baffle 2 and the sliding baffle 6, the position of the displacement gauge fixed on the sliding baffle remains unchanged, ensuring that the measured positions of different concrete specimens are the same, which has a high comparative value.

On the sliding baffle plate 6 and above the sliding column 10, a through hole is provided, and a displacement gauge 12 is inserted and fixed in the through hole. The through hole facilitates the disassembly and assembly of the displacement gauge 12. The change of displacement in the free expansion and contraction process, the displacement meter 12 is connected with a data analysis device 13 by a wire, and the data analysis device 13 is connected with a computer by a wire, and a data analysis system is provided in the data analysis device 13, and the data analysis system includes a processor, The data sending module, power supply module, data analysis module, data processing module, and A/D data conversion module electrically connected to the processor, the A/D data conversion module is electrically connected to the data amplification module, and the data amplification module is electrically connected to the Data acquisition module, the data acquisition module is connected to the displacement meter 12 through wires, the data transmission module and the power supply module are electrically connected to the computer, the power supply module provides the power source for the processor, and the data acquisition module collects the free expansion of concrete through the displacement meter 12 Shrunk data, the data is amplified by the data amplification module, the amplified data is converted by the A/D data conversion module, and the converted data is processed by the data analysis module and the data processing module on the processor. The device sends the processed information to the computer through the data sending module for display and storage. According to the set program flow, the change data is measured at equal intervals and processed and analyzed by the computer to draw a data map of the free expansion and contraction of the concrete. The computer Its function is to store the shrinkage and displacement change data of concrete specimens transmitted by the data analysis system, and at the same time process, analyze and compare the existing data to draw more accurate and reliable test conclusions.

The four corners of the bottom of the backing plate 1 are provided with level adjustment blocks 16, and the center of the slide plate 8 is provided with a bubble level 17, which is embedded in the slide 8, and the upper surface of the bubble level 17 is flush with the upper surface of the slide 8, and the level The function of the adjustment block 16 and the air bubble level 17 is to ensure that the concrete is kept level during the concrete shrinkage test, and the self-weight of the concrete will not affect the change of the displacement measurement direction, which can obviously improve the reliability of the experimental data, and the experimental conclusions drawn have higher value.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (7)

1. A concrete shrinkage tester, comprising a backing plate (1), is characterized in that one end of the backing plate (1) is vertically welded with a fixed baffle (2), and the fixed baffle (2) is located at the Both ends of one side of the backing plate (1) are welded with a baffle strip (3), and the end of the baffle strip (3) away from the fixed baffle (2) is provided with a sliding baffle (6), so The position of the sliding baffle (6) corresponding to the two baffle bars (3) is provided with a sliding hole (7) vertically, the baffle bar (3) is set through the sliding hole (7), and the pad There are three pairs of support plates (4) on both sides of the plate (1) and between the fixed baffle (2) and the sliding baffle (6). The three pairs of support plates (4) are evenly arranged, and each pair of the support plates (4) Sliding rollers (5) are arranged between the supporting plates (4), and the two ends of the sliding rollers (5) are fixed on the supporting plates (4) by bearings, and the sliding baffles (6) correspond to the fixed baffles ( 2) a slide plate (8) is welded on one side, the slide plate (8) is placed on the slide roller (5), and the end of the slide plate (8) away from the slide baffle (6) passes through the fixed The baffle (2) is set, the end of the backing plate (1) away from the fixed baffle (2) is provided with a limit plate (9), and the side of the sliding baffle (6) away from the slide plate (8) is fixed A sliding column (10) is provided, and the sliding column (10) is arranged through the limiting plate (9), and a spring (11) is arranged between the sliding baffle plate (6) and the limiting plate (9), The spring (11) is sleeved on the sliding column (10), and a through hole is arranged on the sliding baffle (6) and above the sliding column (10), and a A displacement meter (12), the displacement meter (12) is connected to a data analysis device (13) through a wire, and the data analysis device (13) is connected to a computer through a wire. 2. A concrete shrinkage tester according to claim 1, characterized in that horizontal adjustment blocks (16) are provided at the four corners of the bottom of the backing plate (1). 3. A concrete shrinkage tester according to claim 1, characterized in that a bubble level (17) is provided at the center of the slide plate (8), and the bubble level (17) is embedded in the In the slide plate (8), the upper surface of the bubble type spirit level (17) is flush with the upper surface of the slide plate (8). 4. a kind of concrete shrinkage tester according to claim 1, is characterized in that, is provided with data analysis system in described data analysis device (13), and described data analysis system comprises processor, and described processor electronic A data transmission module, a power supply module, a data analysis module, a data processing module, and an A/D data conversion module are connected, and the A/D data conversion module is electrically connected to a data amplification module, and the data amplification module is electrically connected to a A data acquisition module, the data acquisition module is connected to the displacement meter (12) through wires, and the data sending module and the power supply module are electrically connected to the computer. 5. A concrete shrinkage tester according to claim 1, characterized in that, each end of said baffle strip (3) is provided with a first stopper (14). 6. The concrete shrinkage tester according to claim 1, characterized in that, the end of the slide plate (8) is provided with a second limit block (15). 7. The concrete shrinkage tester according to claim 1, characterized in that, the surface of the slide plate (8) is a smooth surface structure.