A test device for automatically measuring the shrinkage and expansion function of a mortar concrete test piece

Abstract

The utility model discloses a kind of test devices of automatic measurement mortar concrete test piece shrinkage and expansion function, including curing box, the top cover is provided in the curing box upper side, the control panel is provided in the curing box one side, the curing box inside is provided with cross partition, the curing box inside is provided with support platform, the support platform upper side is all with the measurement unit being provided, the utility model relates to cement mortar, concrete shrinkage and expansion deformation detection technical field, the beneficial effect of the case is: realized without artificial frequent multiple dismounting test piece measurement and bring artificial test piece and energy input, save manpower and time, greatly improve work efficiency, especially for the same time multiple group detection task condition, reduce artificial improvement economic benefit is obvious.

Description

Technical Field

[0001] This utility model relates to the field of cement mortar and concrete shrinkage and expansion deformation detection technology, specifically a test device for automatically measuring the shrinkage and expansion function of mortar and concrete specimens. Background Technology

[0002] The shrinkage rate test of cement mortar involves standards such as JGJ / T 90-2009 "Test Methods for Basic Performance of Building Mortar". It measures the natural drying shrinkage value of cement mortar and is an important physical indicator that reflects the mix proportion performance quality of cement mortar. Existing cement mortar shrinkage and expansion testers are digital or mechanical instruments with manual readings. Before each measurement, they need to be calibrated with a standard rod. Since there are many ages to be tested, it is easy to miss or under-test. Relying entirely on manual operation by testing personnel inevitably introduces human error. Based on the above problems, there may already be technical means in the current technology to solve the above technical solutions. This case aims to provide an alternative or replacement technical means. Summary of the Invention

[0003] To achieve the above objectives, this utility model is implemented through the following technical solution: an automatic test device for measuring the shrinkage and expansion function of mortar concrete specimens, including a curing box, a top cover provided on the upper side of the curing box, a control panel provided on one side of the curing box, a cross-shaped partition provided inside the curing box, a support platform provided inside the curing box, and measuring units provided on the upper side of the support platform; The measuring unit includes a base plate, on which a specimen is placed. A support rod is placed on the upper side of the base plate, and a lifting frame is fitted onto the support rod. An insertion hole is provided on the lifting frame, and a dial indicator is inserted into the insertion hole. Spring dampers are connected to the four corners of the lower side of the support platform. A data collection device is provided on the upper side of the curing box.

[0004] In the above scheme: both sides of the top cover are rotatably connected to handles.

[0005] In the above scheme: a socket is provided on one side of the dial indicator, a data transmission line is plugged into the socket, and the data transmission line is electrically connected to the data collection device.

[0006] In the above scheme: a first fastening bolt is provided at the connection between the lifting frame and the support rod.

[0007] In the above scheme: an opening is provided on one side of the insertion hole, and a second fastening bolt is threadedly connected to the opening.

[0008] This utility model provides an automatic testing device for measuring the shrinkage and expansion of mortar concrete specimens, which has the following beneficial effects: 1. It eliminates the need for frequent and repeated manual disassembly and assembly of test specimens for measurement, thus saving manpower and time and greatly improving work efficiency. In particular, it significantly reduces the economic benefits of reducing manual labor when multiple testing tasks are performed at the same time.

[0009] 2. It reduces the occurrence of missed tests and detections, minimizes manual intervention, and eliminates concerns about missed tests and detections. It also allows for preset testing age and time intervals, significantly improving its intelligent capabilities.

[0010] 3. By using a curing chamber as the main body, it can record temperature and humidity in real time and display the shrinkage and expansion curves in real time, thus eliminating related interference. Attached Figure Description

[0011] Figure 1 This is a first three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0013] Figure 3 This is a schematic diagram of the third three-dimensional structure of the present invention.

[0014] Figure 4 This is a schematic diagram of the present invention.

[0015] In the diagram: 1. Curing box, 2. Top cover, 3. Control panel, 4. Cross spacer, 5. Support platform, 6. Base plate, 7. Specimen, 8. Support rod, 9. Lifting frame, 10. Dial indicator, 11. Spring damper, 12. Data collection device, 13. Handle, 14. Data transmission line, 15. First fastening bolt, 16. Second fastening bolt. Detailed Implementation

[0016] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0017] Please see Figure 1-4 Specific implementation method: An automatic test device for measuring the shrinkage and expansion function of mortar concrete specimen 7 includes a curing box 1, a top cover 2 is provided on the upper side of the curing box 1, a control panel 3 is provided on one side of the curing box 1, a cross-shaped partition 4 is provided inside the curing box 1, a support platform 5 is provided inside the curing box 1, and a measuring unit is provided on the upper side of the support platform 5. The measuring unit includes a base plate 6, a specimen 7 is placed on the upper side of the base plate 6, a support rod 8 is placed on the upper side of the base plate 6, a lifting frame 9 is sleeved on the support rod 8, an insertion hole is opened on the lifting frame 9, a dial indicator 10 is inserted into the insertion hole, spring dampers 11 are connected to the four corners of the lower side of the support platform 5, and a data collection device 12 is placed on the upper side of the curing box 1. It should be noted that when performing the shrinkage and expansion function test on the mortar concrete specimen 7, the specimen 7 is first welded to the base plate 6. Then, the dial indicator 10 is inserted into the socket of the lifting frame 9 and fixed using the second fastening bolt 16. After fixing, the height of the lifting frame 9 and the dial indicator 10 fixed on the lifting frame 9 is adjusted along the support rod 8 so that the probe of the dial indicator 10 contacts the specimen 7. Then, the height of the lifting frame 9 is fixed using the first fastening bolt 15. The specimen 7, support rod 8, lifting frame 9, and dial indicator 10 constitute a measurement unit. To ensure the accuracy of the measurement data, it is necessary to... The operator needs to prepare multiple sets of measurement units, with three measurement units forming a partition. The cross-shaped partition 4 can divide the interior of the curing box 1 into four independent partitions. During the test, the partitioned setting avoids the need to add new test tasks or remove completed test specimens 7 at any time, so that the existing test is not affected. At the same time, in the technical solution, the dial gauge 10 adopts an electronic dial gauge 10 that can transmit data. When the device is running, the data generated by the shrinkage and expansion of the mortar concrete specimen 7 can be sent to the data collection device 12 through the data transmission line 14, and the collected data can be uniformly communicated to the next laptop computer software via USB or Bluetooth. The data collection device 12 receives multiple sets of data and transmits them sequentially to the laptop computer program. The program displays temperature and humidity curves and shrinkage and expansion deformation curves that change over time according to the detection experiment task, and performs real-time calculations to display the test results. If there is an abnormality, a pop-up warning is issued. The data collection device 12 mainly consists of a signal conditioning circuit, a high-precision analog-to-digital converter, a controller, and a communication interface (USB interface). It can collect data generated by dial gauges 10 in multiple measurement units and send it to a laptop computer program, thereby achieving the purpose of automatically measuring the shrinkage and expansion of mortar concrete specimens 7. The support platform 5 is equipped with multiple sets of spring dampers 11. The spring damper 11 consists of shock-absorbing springs and dampers. When the curing box 1 is subjected to external force impact, it can quickly suppress external disturbances and prevent the dial gauge 10 and the test piece 7 from vibrating, thus preventing the situation from affecting the data of the dial gauge 10. While collecting shrinkage and expansion data, the operation of the curing chamber 1 can be controlled through the control panel 3. Through temperature and humidity control and real-time measurement, the accuracy of temperature and humidity control is ensured, and the influence of temperature and humidity changes on the measurement results is avoided. Both sides of the top cover 2 are rotatably connected to handles 13, which facilitates the operator to open and close the maintenance box 1; In summary, this technical solution, by using the curing chamber 1 as the main body, can record temperature and humidity in real time and display shrinkage and expansion curves simultaneously, eliminating related interference. Through the cooperation of multiple components within the curing chamber 1, it eliminates the need for frequent manual disassembly and reassembly of the test specimens 7, thus saving manpower and time and significantly improving work efficiency. This is especially beneficial for situations with multiple testing tasks simultaneously, as the reduction in manual labor significantly improves economic efficiency and reduces the occurrence of missed tests and omissions. The system also allows for preset testing ages and time intervals, significantly enhancing its intelligent capabilities.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic testing device for measuring the shrinkage and expansion function of mortar concrete specimens (7), comprising a curing chamber (1), characterized in that, The maintenance box (1) is provided with a top cover (2) on the upper side, a control panel (3) is provided on one side of the maintenance box (1), a cross-shaped partition (4) is provided inside the maintenance box (1), a support platform (5) is provided inside the maintenance box (1), and a measuring unit is provided on the upper side of the support platform (5); The measuring unit includes a base plate (6), a specimen (7) is provided on the upper side of the base plate (6), a support rod (8) is provided on the upper side of the base plate (6), a lifting frame (9) is sleeved on the support rod (8), an insertion hole is provided on the lifting frame (9), a dial indicator (10) is inserted into the insertion hole, spring dampers (11) are connected to the four corners of the lower side of the support platform (5), and a data collection device (12) is provided on the upper side of the maintenance box (1).

2. The test device for automatically measuring the shrinkage and expansion function of mortar concrete specimens (7) according to claim 1, characterized in that, The top cover (2) has handles (13) rotatably connected to both sides of its upper side.

3. The test device for automatically measuring the shrinkage and expansion function of mortar concrete specimens (7) according to claim 2, characterized in that, The dial indicator (10) has a socket on one side, and a data transmission line (14) is plugged into the socket. The data transmission line (14) is electrically connected to the data collection device (12).

4. The test device for automatically measuring the shrinkage and expansion function of mortar concrete specimens (7) according to claim 3, characterized in that, The lifting frame (9) is provided with a first fastening bolt (15) at the connection between it and the support rod (8).

5. The test device for automatically measuring the shrinkage and expansion function of mortar concrete specimens (7) according to claim 4, characterized in that, An opening is provided on one side of the insertion hole, and a second fastening bolt (16) is threadedly connected to the opening.

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