CN205482906U - Experimental device for spot test panel amount of deflection of weing - Google Patents

Abstract

The utility model provides an experimental device for quickly measuring the damp deflection of a board. The method includes: installing a bracket above a box, the top of which is open and filled with a liquid medium inside; placing the board on the bracket, and Make the plate open to the box body, measure the reading H1 of the center position of the plate through the deflection measuring instrument; heat the liquid medium, and control the temperature and humidity within the preset range; after 20 minutes, measure the reading H2 of the center position of the plate again; obtain Wet deflection H1‑H2. This solution directly heats the water inside the box and exchanges heat with the plate through the steam. The plate is placed directly on the box, and the water vapor can directly reach the test plate. The temperature and humidity conditions can be quickly met without the need for the entire laboratory environment. The temperature and humidity are adjusted, which not only improves the measurement speed, but also saves energy and is more environmentally friendly.

Description

Experimental device for rapid determination of damp deflection of plates

technical field

The utility model relates to a plate deformation testing technology, in particular to an experimental device for quickly measuring the damp deflection of a plate.

Background technique

Hang the test plate for the experiment on the support of the damp deflection tester, use the reading of the center position of the special measurement sample, record the initial value H1, and carry out the experiment under the corresponding experimental conditions according to different product types, and the experimental time 24h. Then measure the reading H2 after conditioning for 24 hours in a laboratory environment with a temperature of (23±5)°C and a relative humidity of (50±10)%. The damp deflection is H1-H2. Due to the large space of the laboratory, it takes a long time to reach the experimental temperature and humidity conditions. The current experimental time needs to be consumed for 48 hours, resulting in a greatly reduced test efficiency.

Utility model content

The utility model provides an experimental device for quickly measuring the damp deflection of a plate, which is used to overcome the defects in the prior art, realize rapid measurement, and greatly improve the test efficiency.

The utility model also provides an experimental device for quickly measuring the moisture deflection of the plate, including:

Deflection measurement bracket for mounting test panels;

The box body is open at the top. The box contains a liquid medium and is located directly below the test plate, and is used to heat the liquid medium so that the ambient temperature and humidity of the test plate are within a preset range.

Preferably, an electric heating element is arranged inside the box.

Preferably, the box is square, and its shape and size are comparable to those of the test plate, and the side panels in the width direction of the box are overhanging upwards relative to the side panels in the length direction to form the deflection measurement stand.

Preferably, the deflection measuring instrument includes a vertical frame, the top of the vertical frame is provided with a horizontal plate, and at least one measuring column for measuring the deflection of the test plate is pierced on the horizontal plate, and the measuring column is Scales are provided and are screwed to the horizontal plate.

Preferably, the standing frame is arranged at the center of the box body.

The experimental method and experimental device for quickly measuring the moisture deflection of the board directly heat the water inside the box, and generate heat exchange with the test board through the evaporation of water, thereby achieving the temperature and relative humidity conditions. Since the test board is directly placed in the box In general, water vapor can directly reach the test plate, and the temperature and relative humidity conditions can be quickly met without having to adjust the ambient temperature and humidity of the entire laboratory. The experimental requirements can be met in 20 minutes, which not only improves the measurement speed, It saves energy and is more environmentally friendly.

Description of drawings

Fig. 1 is the state-reference schematic diagram of the experimental method of the quick measurement panel moisture deflection that the utility model embodiment provides;

Fig. 2 is a reference schematic diagram of the second state of the experimental method for quickly measuring the moisture deflection of the plate provided by the embodiment of the present invention.

detailed description

Referring to Fig. 1 and Fig. 2, the utility model provides a kind of experimental procedure for quickly measuring the damp deflection of the plate as follows:

Step 1, installing the deflection measuring bracket above a box body 1, the top of the box body 1 is open, and the inside contains a liquid medium 10; see Figure 1;

The experimental setup includes:

The box body 1 is open at the top and contains a liquid medium 10, which is located directly below the test plate 2, and is used to heat the liquid medium so that the ambient temperature and humidity of the test plate 2 are within a preset range. In this embodiment, the temperature is: (23±5)°C, the humidity is: (50±10)%, and the liquid medium inside the box body 1 is water. In this embodiment, the box body 1 is square, and its shape and size are equivalent to those of the test plate 2. The side plate 11 in the width direction of the box body 1 is overhanging upwards relative to the side plate 12 in the length direction to form a deflection measurement bracket. .

The deflection measuring bracket is used to install the test plate 2; the deflection measuring instrument includes a vertical frame 3, the top of the vertical frame 3 is provided with a horizontal plate 4, and the horizontal plate 4 is pierced with at least one measuring column for measuring the deflection of the test plate 2 5. The measuring column 5 is provided with a scale and is threaded with the horizontal plate 4 . The standing frame 3 is arranged at the center of the box body 1 . In this embodiment, two measuring columns 5 are arranged on the horizontal plate, and the deflection of the test plate is measured from two positions respectively, and multiple points are taken for measurement, which is conducive to calibrating the measurement results. In order to be applicable to test plates 2 of different widths, it can be The horizontal plate 4 is provided with a plurality of threaded holes 41 along the width direction of the test plate 2, all of which can cooperate with the measuring column 5. When the size of the test plate 2 changes, the measuring column 5 can be selected in the threaded holes 41.

Step 2, place the test plate 2 on the deflection measurement bracket, and make the test plate face the opening of the box, and measure the reading H1 of the center position of the test plate through the deflection measuring instrument; see Figure 2;

Step 21, placing the two ends of the test plate 2 on the two side plates 11 in the width direction of the box body;

Step 22, rotate the measuring column 5 on the horizontal plate 4 of the deflection measuring instrument, so that the measuring column 5 moves down until its bottom touches the center of the upper surface of the plate 2 to be tested, and record the reading H1.

Step 3, heating the liquid medium inside the box, and controlling the temperature and humidity within a preset range;

An electric heating element 6 is arranged inside the box body. The water inside the box body 1 is heated by electric heating. The electric heating element 6 is a prior art, and will not be repeated here.

Step 4, after heating for 20 minutes, measure the reading H2 of the central position of the test plate 2 by the deflection measuring instrument again; rotate the measuring column 5 again so that the measuring column 5 moves downward and conflicts with the upper surface of the test plate 2 deformed by moisture, and at the same time Record reading H2;

Step 5, obtain the damp deflection through calculation, that is, H1-H2.

This experimental method directly heats the water inside the box, and generates heat exchange with the test plate through the evaporation of water, thereby achieving temperature conditions and relative humidity conditions. Since the test plate is directly placed on the box, water vapor can directly reach the test plate. In fact, the temperature and relative humidity conditions can be quickly met without having to adjust the ambient temperature and humidity of the entire laboratory, and the experimental requirements can be met in 20 minutes, which not only improves the measurement speed, but also saves energy and is more environmentally friendly.

The experimental device consists of a box and a deflection measuring instrument. The heating element inside the tank has the function of heating the water. The evaporation rate of water can be controlled by controlling the heating rate. The measuring instrument has a measuring scale as shown in the figure, and any reading can be made within the range where the scale is located. During the experiment, read the indications of the scales, H1 and H2, before and after the board is damp. H1-H2 is the moisture deflection of the board.

Claims (5)

1. a quick mensuration sheet material makes moist the experimental provision of amount of deflection, it is characterised in that including:

Deflection metrology support, is used for installing test sheet material；

Casing, open top, fill liquid medium in described casing, be positioned at immediately below test sheet material, use In by making the ambient temperature residing for described test sheet material and humidity at default model liquid medium heating In enclosing.

Quick mensuration sheet material the most according to claim 1 makes moist the experimental provision of amount of deflection, its feature Being, described box house is provided with electrical heating elements.

Quick mensuration sheet material the most according to claim 2 makes moist the experimental provision of amount of deflection, its feature Being, described casing is square, and shape and size are suitable with the shape and size of described test sheet material, The side plate of described casing width upwards overhangs relative to the side plate of length direction, forms described amount of deflection and surveys Amount support.

Quick mensuration sheet material the most according to claim 3 makes moist the experimental provision of amount of deflection, its feature Being, described deflection metrology instrument includes that a vertical frame, described vertical frame top are provided with horizontal plate, institute State and be equipped with at least one on horizontal plate for measuring the measurement column testing sheet material amount of deflection, on described measurement column It is provided with scale and threadeds between described horizontal plate.

Quick mensuration sheet material the most according to claim 4 makes moist the experimental provision of amount of deflection, its feature Being, described vertical frame is arranged on the center of described casing.