A linear shrinkage-swelling detector for hard inorganic block materials

Abstract

The invention discloses a linear shrinkage-swelling detector for hard inorganic block materials, comprising a horizontal adjustment foot, an instrument base, a reference platform, a standard rod placement block (including a support positioning rod), a detachable high-precision pad, a digital display vernier distance ruler starting position adjustment positioner, a digital display vernier distance ruler, a digital display vernier distance ruler measurement end position adjustment positioner 1, 2, a digital display vernier distance ruler reading display, a digital display micrometer, a standard measuring rod, and a test piece drawing board; the device realizes the function set of a digital display vernier caliper, a length ratio meter, a standard length rod, and a micrometer, effectively realizes the fast, accurate, and stable measurement of the linear length of the inorganic block material, and solves the problem of free measurement of the linear length of materials of different sizes and convenient adjustment of different test accuracies.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment for concrete, inorganic thermal insulation boards and building partition wall strips, and in particular relates to a linear shrinkage-wet expansion detector for hard inorganic block materials. Background Art

[0002] Concrete, inorganic insulation board, and building partition board are very common building materials, and linear shrinkage-wet expansion rate is one of the important indicators to measure their quality. Most of the existing testing equipment is for specific products and professional projects. Due to the limitations of test accuracy and specimen size, it cannot cover the testing of similar projects of other materials. Due to various reasons such as price and market, its manufacturing status is relatively rough, which is not equivalent to the current high-precision laboratory construction.

[0003] At present, there are special equipment for the detection of linear dimensional change rate of concrete and inorganic insulation board, such as concrete shrinkage and expansion meter and ratio meter. The building partition wall strips can be measured with large-size outside diameter micrometer. Although they can meet the requirements of measurement reading accuracy in relevant test standards, there are many operational errors caused by the measurement process, and the area occupied is large. For example, the outside diameter micrometer with a range of about 600mm is heavy, so it needs a special support frame to assist in stability when used. In addition, the height of the measuring point changes during use, and it is also inconvenient to adjust the height of the measuring point. When used handheld, it will introduce large operational errors due to the shaking of the hand.

[0004] The invention patent application with publication number CN107514960A discloses a concrete expansion and contraction test length measuring instrument and measurement method. The invention can be applied to the precise length measurement of concrete specimens of different specifications by replacing the specimen fixture. The invention has strong applicability and can accurately measure the lengths of concrete specimens of different tests and specifications on one instrument. The invention can ensure the standardization and unification of the length measurement tests of concrete specimens of different specifications and ensure the consistency and accuracy of the measurement data. However, the invention cannot meet the requirements of linear measurement of different precisions and different materials. At the same time, the operating error has a great influence on high-precision measurement when using this method. Summary of the invention

[0005] The purpose of the present invention is to provide a linear shrinkage and swelling detector for hard inorganic block materials in view of the above-mentioned problems, which aims to achieve high precision and integration, effectively realize the special function combination of digital display vernier caliper, comparator, standard length rod and micrometer, and meet the requirements of linear measurement of specimens of different sizes under the same test accuracy conditions. At the same time, the placement of the specimen is relatively fixed during the secondary measurement, making the test more convenient and the results more accurate.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The invention discloses a linear shrinkage-wet expansion detector for hard inorganic block materials. The detector comprises an instrument base frame, and a leveling foot is arranged at the bottom of the instrument base frame. The instrument base frame, the leveling foot and a reference platform together constitute a horizontal support surface of the detector. The leveling foot adjusts the instrument base frame to make it horizontal. The instrument base frame carries the whole machine together with the tested piece, has a firm structure and sufficient rigidity, and requires high processing and manufacturing precision. The reference platform needs to be highly consistent, with a flat and smooth surface. The bottom surface of the standard rod placement block has good flatness. When placed in the groove of the reference platform, the two contact surfaces fit well.

[0008] A standard measuring rod placement block is placed on the horizontal support surface, the upper surface of the standard measuring rod placement block is recessed downward to form an equidistant standard measuring rod placement block fixing groove, the standard measuring rod placement block fixing groove is used to place a specimen support positioning rod or a standard measuring rod, a test piece is placed above the standard measuring rod placement block, both ends of the test piece extend outward to form a pre-embedded measuring head of the test piece, and the lower surface of the test piece contacts the specimen support positioning rod or the standard measuring rod; by arranging a specimen support positioning rod on the standard rod placement block and drawing equidistant marking lines on the lower surface of the specimen, it is possible to ensure that the specimen is as close as possible to the initial measurement position when the same specimen is moved and measured multiple times;

[0009] Furthermore, a digital display vernier distance scale is arranged at the upper end of the detector, and a digital display vernier distance scale starting position adjustment locator is arranged at the starting point of the digital display vernier distance scale, and the locator is clamped downward to receive the test piece; a digital display vernier distance scale end position adjustment locator 1 is arranged at the end point of the digital display vernier distance scale; a detachable high-precision pad is connected to the instrument base frame at one end of the digital display vernier distance scale starting position adjustment locator by screws; one end of the embedded measuring head of the test piece is connected to the detachable high-precision pad, and the other end is connected to the digital display vernier distance scale end position adjustment locator 2;

[0010] Place the standard rod placement block in the fixed groove of the standard rod placement block. The removable high-precision pad and its groove are the center line of the instrument measurement, ensuring that the linear measurement point of the specimen is relatively fixed. If the measurement point is in the middle of the concave surface of the specimen, the removable high-precision pad needs to be installed first. If the specimen is in the middle of the convex surface, the removable high-precision pad can be retained or removed according to the test process;

[0011] The digital display vernier distance scale and the digital display vernier distance scale end point position adjustment positioner 1 form a bracket connected to the digital display vernier distance scale reading display, and the digital display vernier distance scale end point position adjustment positioner 1 and the digital display vernier distance scale end point position adjustment positioner 2 form a bracket connected to the digital display micrometer; in conjunction with the use of a standard measuring rod, by setting a micrometer on the digital display vernier distance scale measurement end point position adjustment positioner, the measurement accuracy is directly converted to achieve different measurement accuracy requirements;

[0012] If it is necessary to measure at any middle position of the instrument, in order to ensure that the second measurement position of the test piece remains unchanged, it is necessary to draw support marking lines on the lower surface of the test piece with a test piece drawing board according to the length of the test piece. By pre-drawing two marking lines equidistant from the support positioning rod on the lower surface of the test piece, the placement point of the test piece can be relatively fixed during the second measurement, making the test result more accurate.

[0013] Further, the specimen support positioning rod is placed according to the marking line, and the specimen is placed on the support positioning rod;

[0014] When the measurement accuracy is 0.01mm, the specimen can be placed on the specimen support rod, and the digital display vernier distance scale measurement end point position is adjusted to adjust the measurement surface height of the positioner 1 and 2 to match the measurement point position, so that the two measurement surfaces fit together, and the digital display vernier distance scale reading display is set to zero and can be pulled apart for measurement;

[0015] When the measurement accuracy is 0.001mm, the high-precision pad can be installed or removed at the starting end according to the measurement needs, the standard benchmark rod is placed on the standard rod placement block, and the micrometer is installed on the digital display vernier range gauge measurement end position adjustment locator 2, and the locator height is adjusted to match the measurement point. Then the digital display vernier range gauge is moved to make the digital display vernier range gauge measurement end position adjustment locator 2 fit the standard measuring rod and compress it to the middle part of the measuring range, the micrometer is set to zero, the standard measuring rod is removed and replaced with the specimen support rod, and the test piece can be placed for measurement. The measured value is added to the standard measuring rod value to get the specimen length value; in this way, linear measurement of objects of any size with different accuracy requirements within the measuring range of the digital display vernier ruler can be achieved.

[0016] The technical effects of the present invention are as follows:

[0017] The present invention discloses a linear shrinkage-wet expansion detector for hard inorganic block materials, which is suitable for the detection of concrete, inorganic insulation boards, and building partition wall strips. One device meets the requirements of linear measurement of different lengths, different precisions, and different materials, saving laboratory site resources and the maintenance cost of multiple scattered equipment; the vernier principle is adopted to eliminate the operating error caused by the operator manually supporting the measuring tool and causing jitter, which has a very large impact in high-precision measurement. The device realizes the functional combination of a digital display vernier caliper, a comparator, a standard length rod, and a micrometer, and effectively realizes the fast, accurate, and stable measurement of the linear length of inorganic block materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the elevation drawing of the 1:0.01mm precision measuring and testing instrument;

[0019] 1-leveling foot, 2-instrument base, 3-reference platform, 4-standard rod placement block, 5-detachable high-precision pad, 6-test piece, 7-digital display vernier distance meter, 8-starting position adjustment locator, 9-digital display vernier distance meter measurement end position adjustment locator 1, 10-digital display vernier distance meter reading display, 13-test piece support rod, 16-test piece embedded measuring head;

[0020] Figure 2 This is the elevation drawing of the 1:0.001mm precision measuring and testing instrument;

[0021] 4-standard rod placement block, 6-test piece, 11-digital display vernier distance ruler measuring end point position adjustment locator 2, 12-digital display micrometer, 13-test piece support rod;

[0022] Figure 3 is the plan view of the detector;

[0023] 7-digital display vernier distance scale, 10-digital display vernier distance scale reading display, 14-fixing groove for standard measuring rod placement block;

[0024] Figure 4 It is a schematic diagram of the structure of the standard rod placement block (including the support positioning rod);

[0025] 4-standard rod placement block, 15-standard measuring rod;

[0026] Figure 5 It is a schematic diagram of the combined structure of a digital display vernier distance gauge measuring end point position adjustment positioner, a digital display vernier distance gauge reading display, and a digital display micrometer;

[0027] 9-digital display vernier distance ruler measurement end point position adjustment positioner 1; 10-digital display vernier distance ruler reading display; 11-digital display vernier distance ruler measurement end point position adjustment positioner 2; 12-digital display micrometer. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] In this embodiment, the data used are preferred solutions, but are not used to limit the present invention;

[0031] like Figure 1-5As shown, this embodiment provides a linear shrinkage-wet expansion detector for hard inorganic block materials, the detector includes a leveling foot, an instrument base, a reference platform, a standard rod placement block, a detachable high-precision pad, a test piece, a pre-embedded measuring head of the test piece, a digital display vernier distance gauge, a starting position adjustment positioner, a digital display vernier distance gauge measurement end position adjustment positioners 1 and 2, a digital display vernier distance gauge reading display, a digital display micrometer, a test piece support rod, a standard measuring rod placement block fixing groove, and a standard measuring rod, and the structure is made of stainless steel;

[0032] Example 1

[0033] like Figure 1 As shown, the initial size of the partition wall strips is measured with an accuracy of 0.01mm;

[0034] First, place the test piece on the test piece support rod; adjust the starting position adjustment locator and the end position adjustment locator of the digital display vernier distance ruler according to the lowest position of the test point of the same group of test pieces, and use the test height to meet the height requirements of the test points of several test pieces in the same group; at the same time, fit the locator with the two measuring surfaces, and then set the digital display vernier distance ruler reading display to zero to start measurement, and obtain a measurement result with an accuracy of 0.01mm;

[0035] Example 2

[0036] like Figure 2 As shown, the dimensional accuracy of the partition wall strips after drying and shrinkage is 0.001mm;

[0037] Install or remove the high-precision pad at the starting end according to the measurement needs. If the measuring point is in the middle of the concave surface of the specimen, the detachable high-precision pad needs to be installed first; if the specimen is in the middle of the convex surface, the detachable high-precision pad can be retained or removed according to the test process. The setting of the detachable high-precision pad can meet the measurement accuracy requirements of irregularly shaped specimens.

[0038] Furthermore, a micrometer is installed on the digital display vernier distance gauge measurement end point position adjustment positioner 2. By setting the micrometer on the digital display vernier distance gauge measurement end point position adjustment positioner, the measurement accuracy is directly changed to achieve different measurement accuracy requirements; according to the lowest position of the measurement point of the same group of test pieces, the height of the digital display vernier distance gauge measurement end point position is adjusted to meet the measurement point position;

[0039] Further, by moving the digital display vernier distance scale to make the digital display vernier distance scale measurement end point position adjustment locator 2 fit with the standard measuring rod and compress it to the middle of the measuring range, the micrometer is set to zero, the standard measuring rod is removed and replaced with the specimen support rod, and the test piece can be placed for measurement. The measured value is added to the standard measuring rod value to obtain the length value of the specimen;

[0040] The standard measuring rod is placed in the fixed groove of the standard measuring rod placement block, and the removable high-precision pad and its groove are the center line of the instrument measurement, ensuring that the linear measuring point of the test piece is relatively fixed;

[0041] In this embodiment, by setting a specimen support positioning rod on the standard rod placement block and marking equidistant marking lines on the lower surface of the specimen, it is possible to ensure that the specimen is in the same position as the initial measurement position as much as possible when the same specimen is moved and measured multiple times;

[0042] In this embodiment, if it is necessary to measure at any intermediate position of the instrument, in order to ensure that the measurement position of the measured specimen remains unchanged after the second placement, it is necessary to draw support marking lines on the lower surface of the tested specimen using a specimen drawing board according to the length of the tested specimen, and place the specimen support positioning rod according to the marking lines; place the specimen on the support positioning rod, and adjust the digital display vernier rangefinder starting position adjustment positioner and the digital display vernier rangefinder measurement end position adjustment positioner 1 or 2 according to the measuring point height so that the height meets the measuring point requirements.

[0043] This can realize linear measurement of objects of any size within the range of the digital display vernier scale with different precision requirements; if it is necessary to use it in any part of the middle of the scale, two marking lines equidistant from the support positioning rod can be pre-drawn on the lower surface of the test piece, so that the placement point of the test piece can be relatively fixed during the secondary measurement, making the test result more accurate;

[0044] After the test, remove the test piece to clean the dust and ash, wipe the parts with oiled cotton yarn to prevent rust or jamming, and wait for the next use. The parts of this detector have simple structures, and the test process is completed in a fast, convenient and simple way. The test data is accurate and efficient.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear shrinkage-swelling detector for hard inorganic block materials, characterized in that: The detector comprises an instrument base frame (2), a detachable high-precision pad strip (5) is arranged at the measuring end of the instrument base frame (2), and the high-precision pad strip (5) is connected to the instrument base frame (2) by screws; A horizontal adjustment foot (1) is arranged at the bottom of the instrument base (2); the instrument base (2), the horizontal adjustment foot (1) and the reference platform (3) together constitute a horizontal support surface of the detector, a standard measuring rod placement block (4) is placed on the horizontal support surface, the upper surface of the standard measuring rod placement block is recessed downward to form standard measuring rod placement block fixing grooves (14) with equal distances, and the standard measuring rod placement block fixing grooves (14) are used to place a specimen support rod (13) or a standard measuring rod (15); A digital display vernier distance scale (7) is arranged at the upper end of the detector, and a digital display vernier distance scale (7) starting position adjustment locator (8) is arranged at the starting point of the digital display vernier distance scale (7), and the starting position adjustment locator (8) is clamped downward to receive the test piece; a digital display vernier distance scale end position adjustment locator 1 (9) is arranged at the end point of the digital display vernier distance scale (7); a detachable high-precision pad (5) is connected to the instrument base frame (2) at one end of the digital display vernier distance scale (7) starting position adjustment locator (8) by screws; one end of the embedded measuring head (16) of the test piece is connected to the detachable high-precision pad (5), and the other end is connected to the digital display vernier distance scale end position adjustment locator 2 (11); The digital display vernier distance scale (7) and the digital display vernier distance scale end point position adjustment positioner 1 (9) form a bracket connected to the digital display vernier distance scale reading display (10), and the digital display vernier distance scale end point position adjustment positioner 1 (9) and the digital display vernier distance scale end point position adjustment positioner 2 (11) form a bracket connected to the digital display micrometer (12); by using a standard measuring rod (15) in conjunction with the digital display vernier distance scale end point position adjustment positioner 1 (9) and the digital display vernier distance scale end point position adjustment positioner 2 (11), the measurement accuracy is directly converted to achieve different measurement accuracy requirements.

2. The linear shrinkage and swelling detector for hard inorganic bulk materials according to claim 1, characterized in that: A test piece (6) is placed above the standard measuring rod placement block (4), and both ends of the test piece (6) extend outward to form a test piece embedded measuring head (16), and the lower surface of the test piece (6) is in contact with a test piece support rod (13) or a standard measuring rod (15).

3. The method for using the linear shrinkage-swelling detector for hard inorganic block materials according to any one of claims 1-2, characterized in that: The detection process of the detector is as follows:

1. The measurement accuracy is 0.01mm; place the test piece (6) on the test piece support rod (13), adjust the digital display vernier distance ruler starting position adjustment positioner (8) and the digital display vernier distance ruler end position adjustment positioner 1 (9), adjust the heights of the two positioners to match the measurement point, and at the same time, the positioners fit the two measurement surfaces, and then set the digital display vernier distance ruler reading display (10) to zero to start measurement; 2. The measurement accuracy is 0.001 mm. First, according to the measurement needs, a detachable high-precision pad (5) is installed or removed at the starting end, and the standard measuring rod (15) is placed on the standard measuring rod placement block (4). The micrometer (12) is installed on the digital display vernier distance scale measurement end position adjustment positioner 2 (11), and the height of the digital display vernier distance scale measurement end position adjustment positioner 2 (11) is adjusted to match the measurement point position; by moving the digital display vernier distance scale (7), the digital display vernier distance scale measurement end position adjustment positioner 2 (11) and the standard measuring rod (15) are attached and compressed to the middle of the measuring range, the micrometer (12) is set to zero, the standard measuring rod (15) is removed and replaced with the specimen support rod (13), and the test piece (6) can be placed for measurement. The measured value is added to the value of the standard measuring rod (15) to obtain the length value of the specimen.

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