Portable drying shrinkage experimental device

Abstract

The utility model discloses a portable dry shrinkage experimental device, which comprises a weight measuring device, a carrying disc, a supporting rod and a displacement measuring device, the displacement measuring device can slide in the axial direction of the supporting rod, the measuring requirements of experimental samples of different sizes can be met, meanwhile, all the components are movably connected and can be stored respectively after being detached, the storage space is reduced, the portability is improved, drying shrinkage measurement can be carried out in various environments, and the measuring efficiency is improved. The dial indicator can ensure the accuracy of experimental results and reduce errors; and the electronic weighing instrument capable of automatically weighing is adopted as the base, so that the process of repeatedly weighing the sample before and after each experiment is reduced, the experiment precision is improved, and the operation steps are simplified. The device is small and exquisite in structure and low in manufacturing cost, can meet experiment requirements under various conditions, and solves the problems that an existing laboratory contractimeter is large in size, high in price and not suitable for being repeatedly carried to meet the experiment requirements of various environments.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a portable shrinkage experimental device. Background Art

[0002] The evaporation of water in inorganic binder stabilized materials in the air (dehydration and drying) will cause the materials to shrink, which will adversely affect the performance and service life of the materials. Therefore, it is very important to measure the shrinkage coefficient of various engineering materials for engineering projects. Shrinkage experiments are often carried out in the laboratory using a special shrinkage instrument. The method is to place the beam specimen formed indoors on the shrinkage instrument and install a micrometer at both ends of the shrinkage instrument. When the specimen loses water, the overall shrinkage of the specimen will cause the micrometer contact to move and cause the micrometer reading to change, thereby determining the shrinkage deformation value of the specimen. The traditional shrinkage test is to make two groups of specimens, one for shrinkage deformation observation and the other for water loss rate detection. Due to the large discreteness of cement stabilized gravel itself, the shrinkage test results measured by this method have certain errors. Moreover, due to the large size of the measuring device, high cost, and difficulty in specimen production, it is not suitable for repeated transportation to meet the experimental needs of various environments. In order to solve the above problems, it is necessary to design a portable shrinkage test equipment. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a portable shrinkage experiment device, which solves the defect that the existing shrinkage instrument is not easy to carry.

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

[0005] A portable shrinkage experiment device, comprising a weight measuring device, a loading plate, a support rod and a displacement measuring device;

[0006] The loading plate is detachably mounted on the weight measuring device, the lower end of the support rod is connected to the loading plate, the displacement measuring device is slidably mounted on the support rod, the loading plate is used to place the target object to be measured, and the measuring end of the displacement measuring device is used to abut against the target object to be measured.

[0007] Preferably, the loading tray is a folding structure, which is a box-like structure with an open top when unfolded and a sheet-like structure when folded.

[0008] Preferably, the loading tray comprises a bottom plate, a back plate and side plates, the lower end of the back plate is hinged to the edge of the bottom plate, and the two ends of the back plate are respectively hinged to the side plates.

[0009] Preferably, the support rod is detachably connected to the loading tray.

[0010] Preferably, the loading tray is plugged and fixed to the lower end of the support rod.

[0011] Preferably, the displacement measuring device is connected to the upper part of the support rod through a cantilever.

[0012] Preferably, a U-shaped groove is provided at one end of the cantilever, the displacement measuring device is installed in the U-shaped groove, and a locking component is provided at the open end of the U-shaped groove.

[0013] Preferably, the other end of the cantilever is sleeved on the support rod, and a positioning bolt is provided on the cantilever.

[0014] Preferably, the displacement measuring device is a pointer-type micrometer or an electronic micrometer.

[0015] Preferably, the weight measuring device is an electronic weighing instrument.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] The utility model provides a portable shrinkage experiment device, including a weight measuring device, a loading plate, a support rod and a displacement measuring device; and the displacement measuring device can slide along the axial direction of the support rod, and can meet the measurement requirements of experimental samples of different volumes. At the same time, each component is movably connected, and can be stored separately after disassembly, which reduces the storage space and improves its portability, so that it can be used to measure shrinkage in various environments. The use of a micrometer can ensure the accuracy of the experimental results and reduce errors; an electronic weighing instrument that can automatically weigh is used as the base, which reduces the process of repeatedly weighing the sample before and after each experiment, improves the experimental accuracy, and simplifies the operating steps. The device has a compact structure, is easy to transport and carry, has a low production cost, can meet the experimental needs under various conditions, and solves the problem that the existing laboratory shrinkage instrument is bulky, expensive, and not suitable for repeated transportation to meet the experimental needs of various environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the portable shrinkage experimental device of the utility model;

[0019] Figure 2 It is a side schematic diagram of the portable shrinkage experimental device of the utility model;

[0020] Figure 3 It is a front schematic diagram of the portable shrinkage experimental device of the utility model.

[0021] In the figure: a weight measuring device 1, a loading plate 2, a support rod 3, a displacement measuring device 4, a cantilever 401, a positioning bolt 402, a locking bolt 403, a pointer-type micrometer 404, and a hinge 408. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0023] See also Figure 1-3 A portable shrinkage experiment device includes a weight measuring device 1, a loading plate 2, a support rod 3 and a displacement measuring device 4.

[0024] The loading pan 2 is detachably arranged on the weight measuring device 1, the lower end of the support rod 3 is connected to the loading pan 2, the displacement measuring device 4 is slidably arranged on the support rod 3, the loading pan 2 is used to place the target object to be measured, and the measuring end of the displacement measuring device 4 is used to abut against the target object to be measured.

[0025] The loading tray 2 is a folding structure, which is a box-like structure with an open top when unfolded and a sheet-like structure when folded. In this embodiment, the loading tray 2 is a box-like structure with an open top and one end when unfolded, which is convenient for placing and taking the target object to be measured.

[0026] The weight measuring device 1 is an electronic weighing instrument, and the loading pan 2 is placed on the top of the electronic weighing instrument. At this time, the electronic weighing instrument can measure the weight of the loading pan 2 and the target object to be measured therein. It should be noted that in the actual experimental measurement process, the electronic weighing instrument needs to be reset to zero, that is, the weight of the loading pan 2, the support rod and the displacement measuring device 4 needs to be removed to reduce the measurement error.

[0027] The loading tray 2 includes a bottom plate and a foldable fence, the fence includes a back plate and two side plates, the lower end of the back plate is hinged to the edge of the bottom plate, the side plates are symmetrically arranged on both sides of the back plate along the center of the bottom plate, one end of the side plate is hinged to one end of the back plate, and the loading tray adopts a foldable structure to effectively reduce its occupied area, making it easy to carry and transport, and at the same time, it is easy to unfold and operate, and is very suitable for conducting shrinkage experiments on materials at construction sites.

[0028] When unfolding, the back panel is rotated to a vertical state, and then the two side panels are rotated relative to each other to open, so that the back panel and the two side panels form a U-shaped structure and are supported on the bottom plate. In this embodiment, the loading tray in the unfolded state forms a dustpan shape; for folding, the two side panels are first rotated relative to each other and contacted with the back panel, and then the back panel is rotated toward the bottom plate to form a sheet-like structure.

[0029] The support rod is detachably connected to the loading tray. The support rod and the loading tray can be separated in an idle state to improve the portability of the entire device. In this embodiment, the back panel is hinged to the bottom panel and the side panels through hinges 408.

[0030] The back plate is provided with a vertical fixing hole, and the support rod 3 is inserted into the fixing hole to achieve a detachable connection with the loading plate. The displacement measuring device 4 is connected to the upper part of the support rod through the cantilever 401. One end of the cantilever 401 is provided with a U-shaped groove, and the displacement measuring device 4 is installed in the U-shaped groove. The open end of the U-shaped groove is provided with a locking bolt 403, and the locking bolt 403 applies a clamping force to the open end of the U-shaped groove through a thread to fix the displacement measuring device 4. The other end of the cantilever 401 is sleeved on the support rod, and a positioning bolt 402 is provided on the cantilever 401. A vertical slide groove is provided on the support rod, and the end of the positioning bolt 402 passes through the cantilever 401 and extends into the slide groove, and the end of the positioning bolt 402 abuts against the slide groove to achieve the positioning of the cantilever.

[0031] The displacement measuring device 4 is a pointer type micrometer 404 or an electronic micrometer.

[0032] The following is a detailed description of the method for using a portable shrinkage experiment device provided by the utility model.

[0033] Unfold the loading tray and place it on the electronic weighing instrument, then insert the lower end of the support rod into the mounting hole of the back plate, then install the cantilever on the upper end of the support rod, and install the pointer micrometer on the other end of the cantilever with the measuring end of the pointer micrometer extending downward, and then return the electronic weighing instrument to zero.

[0034] Place the test specimen to be measured on the loading pan, adjust the height of the pointer micrometer by the cantilever until the measuring end of the pointer micrometer abuts against the top surface of the test specimen, and record the value of the pointer micrometer and the value of the electronic weighing instrument at that moment.

[0035] Regularly record the values ​​of the pointer micrometer and the electronic weighing instrument to complete the shrinkage test of the experimental specimen.

[0036] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A portable shrinkage experiment device, characterized in that: It comprises a weight measuring device (1), a loading plate (2), a supporting rod (3) and a displacement measuring device (4); The loading plate (2) is detachably mounted on the weight measuring device (1); the lower end of the support rod (3) is connected to the loading plate (2); the displacement measuring device (4) is slidably mounted on the support rod (3); the loading plate (2) is used to place a target object to be measured; and the measuring end of the displacement measuring device (4) is used to abut against the target object to be measured.

2. A portable shrinkage experiment device according to claim 1, characterized in that: The object carrier plate (2) is a foldable structure, which is a box-like structure with an open top when unfolded, and a sheet-like structure when folded.

3. A portable shrinkage experiment device according to claim 1, characterized in that: The loading tray (2) comprises a bottom plate, a back plate and side plates, wherein the lower end of the back plate is hinged to the edge of the bottom plate, and the two ends of the back plate are respectively hinged to the side plates.

4. A portable shrinkage experiment device according to claim 1, characterized in that: The support rod is detachably connected to the loading tray.

5. The portable shrinkage experiment device according to claim 1, characterized in that: The loading tray is plugged and fixed to the lower end of the supporting rod.

6. A portable shrinkage experiment device according to claim 1, characterized in that: The displacement measuring device (4) is connected to the upper part of the support rod via a cantilever (401).

7. A portable shrinkage experiment device according to claim 6, characterized in that: A U-shaped groove is provided at one end of the cantilever (401), the displacement measuring device (4) is installed in the U-shaped groove, and a locking component is provided at the open end of the U-shaped groove.

8. The portable shrinkage experiment device according to claim 6, characterized in that: The other end of the cantilever (401) is sleeved on the support rod, and a positioning bolt (402) is provided on the cantilever (401).

9. The portable shrinkage experiment device according to claim 1, characterized in that: The displacement measuring device (4) is a pointer-type micrometer or an electronic micrometer.

10. The portable shrinkage experiment device according to claim 1, characterized in that: The weight measuring device (1) is an electronic weighing instrument.

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