A marshall specimen molding auxiliary device

Abstract

The application provides a Marshall specimen forming auxiliary device connected to a Marshall compaction instrument, comprising a workbench, a control panel arranged on the upper end of the workbench, a weighing mechanism and a support; the support comprises a telescopic measuring rod arranged on the side of the weighing mechanism and a horizontal support plate connected to the upper part of the telescopic measuring rod and rotatable along a horizontal plane, and the lower end surface of the horizontal support plate is provided with a temperature measuring mechanism and a height measuring mechanism. The Marshall specimen forming auxiliary device provided by the application sets the support with changeable height and angle on the side of the weighing mechanism of the Marshall specimen, and integrates the temperature measuring mechanism and the height measuring mechanism on the support, so that the multiple data of the Marshall specimen can be measured in one device, the operation complexity of the Marshall specimen test is reduced, and the problem that the accuracy of the test result is affected by the too long measurement time is solved.

Description

Technical Field

[0001] This application relates to the field of building engineering quality inspection technology, specifically to a Marshall specimen molding auxiliary device. Background Technology

[0002] Marshall specimens are a common type of test sample used in road engineering, primarily for evaluating the performance and stability of asphalt mixtures. In the Marshall specimen molding process, the specimens compacted by the Marshall compactor require key steps such as temperature measurement, compaction height measurement, and weighing adjustment. Currently, data measurement of Marshall specimens often involves manual methods. This involves measuring the temperature of the specimen on one workbench, then moving it to another workbench for weight measurement, and finally measuring the height on the last workbench. Alternatively, the Marshall specimen can be directly placed on a weighing platform for both height and temperature measurements. The former requires manual operation with multiple tools, making it cumbersome and time-consuming. While the latter avoids multiple transfers of the Marshall specimen, the measurement time is longer, and the adjustment of different measuring tools is more complex. Because asphalt mixtures have high temperatures, excessively long measurement times can lead to temperature loss and human error, affecting the accuracy and reliability of the test results, and may even adversely affect the measuring tools, damaging equipment performance.

[0003] Therefore, there is an urgent need for a Marshall specimen molding auxiliary device to reduce the complexity of Marshall specimen testing operations and improve the accuracy of test results. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for Marshall specimen molding, which can effectively reduce the complexity of Marshall specimen testing operations and solve the problem that excessive measurement time affects the accuracy of test results.

[0005] This application is achieved through the following technical solution, specifically: A Marshall specimen molding auxiliary device, connected to a Marshall compactor, is characterized in that it includes: a workbench, a control panel disposed on the upper part of the workbench, a weighing mechanism, and a support; the support includes a telescopic measuring rod installed on the side of the weighing mechanism and a horizontal support plate connected to the upper part of the telescopic measuring rod that can rotate along the horizontal plane, and a temperature measuring mechanism and a height measuring mechanism are installed on the lower end surface of the horizontal support plate.

[0006] This solution integrates the temperature measurement mechanism, height measurement mechanism, and weighing mechanism, eliminating the need for frequent specimen transfer between multiple workbenches in traditional methods. This simplifies the operation, effectively improves measurement efficiency, and reduces the risk of accidental damage or data anomalies caused by repeated specimen movement. Furthermore, the device combines a telescopic measuring rod with a horizontally rotatable support plate, with the temperature and height measurement mechanisms mounted on the lower surface of this support plate. This allows for rapid removal of the support plate after measurement, minimizing the impact of temperature loss on the experimental results and ensuring their reliability and accuracy. In addition, the support plate can accommodate specimens of different sizes and positions, further enhancing measurement precision.

[0007] As an improvement to the control panel in this application, the control panel includes a display screen fixedly mounted on the upper part of the workbench and a controller disposed inside the control panel. The controller includes a data receiving unit, an instruction sending unit, and a storage unit. The data receiving unit is electrically connected to the weighing mechanism, the temperature measuring mechanism, and the height measuring mechanism, respectively, and is used to receive the measurement data of the Marshall specimen and save it to the storage unit. The display screen is used for human-computer interaction and displaying measurement data.

[0008] Furthermore, a position sensor is installed on the bracket, and the position sensor is electrically connected to the command sending unit and the data receiving unit respectively.

[0009] Furthermore, the data receiving unit is electrically connected to the counting unit of the Marshall compactor.

[0010] As an improvement to the measuring rod in this application, the measuring rod is vertically provided with an L-shaped slide groove, and a lead screw assembly for driving the horizontal support plate to move along the L-shaped slide groove is provided inside. The horizontal support plate is connected to the lead screw assembly through a nut seat.

[0011] Furthermore, the lead screw assembly is also equipped with a drive assembly, which includes a first bevel gear and a second bevel gear that mesh with each other, and a drive motor connected to the second bevel gear.

[0012] As an improvement to the present application, the weighing mechanism includes a heat insulation plate fixed to the end face of the workbench and a weighing sensor installed under the heat insulation plate; the temperature measuring mechanism includes an infrared temperature measuring probe; and the height measuring mechanism includes an ultrasonic generator.

[0013] As an improvement to the workbench in this application, the bottom of the workbench is equipped with an adjustable height support.

[0014] As an improvement to the workbench in this application, the workbench is equipped with casters at the four corners of its bottom.

[0015] The beneficial effects of this application are as follows: This application's solution integrates the temperature measurement mechanism, height measurement mechanism, and weighing mechanism, eliminating the need for frequent specimen transfer between multiple workbenches in traditional methods. This simplifies the operation, effectively improves measurement efficiency, and reduces the risk of accidental damage or data anomalies caused by repeated specimen movement. Furthermore, the device combines a telescopic measuring rod with a horizontally rotatable support plate, with the temperature and height measurement mechanisms mounted on the lower surface of this support plate. This allows for rapid removal of the support plate after measurement, minimizing the impact of temperature loss on experimental results and ensuring the reliability and accuracy of the test results. In addition, the support plate can accommodate specimens of different sizes and positions, further enhancing measurement accuracy.

[0016] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a Marshall specimen molding auxiliary device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a Marshall specimen molding auxiliary device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the bracket in the embodiments of this application; Figure 4 This is a schematic diagram of the controller connection in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Control panel; 3. Weighing mechanism; 4. Support; 41. Telescopic measuring rod; 42. Horizontal support plate; 5. Temperature measuring mechanism; 6. Height measuring mechanism; 21. Display screen; 22. Controller; 221. Data receiving unit; 222. Command sending unit; 223. Storage unit; 411. L-shaped slide; 412. Lead screw assembly; 421. Nut seat; 413. Drive assembly; 414. First bevel gear; 415. Second bevel gear; 416. Drive motor; 7. Support base; 8. Casters. Detailed Implementation

[0019] The following will be combined with the appendix Figures 1-4The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] In view of the problems existing in the background technology or products, Figure 1 A schematic diagram of a Marshall specimen molding auxiliary device according to an embodiment of this application is shown, as follows: Figure 1 As shown in the figure, this application provides a Marshall specimen molding auxiliary device connected to a Marshall compactor. Its main structure includes: a workbench 1, a control panel 2 disposed on the upper end of the workbench 1, a weighing mechanism 3, and a support 4. The support 4 includes a telescopic measuring rod 41 installed on the side of the weighing mechanism 3 and a horizontal support plate 42 connected to the upper part of the telescopic measuring rod 41 and rotatable along the horizontal plane. A temperature measuring mechanism 5 and a height measuring mechanism 6 are installed on the lower end surface of the horizontal support plate 42.

[0021] Specifically, this embodiment integrates the temperature measuring mechanism 5, the height measuring mechanism 6, and the weighing mechanism 3, eliminating the need for frequent specimen transfer between multiple workbenches in traditional methods. This significantly reduces operational steps and improves work efficiency. Simultaneously, it reduces the risk of accidental damage or data anomalies caused by repeated specimen movement. Furthermore, the device combines the support 4 with a telescopic measuring rod 41 and a horizontally rotatable support plate 42, with the temperature measuring mechanism 5 and the height measuring mechanism 6 mounted on the lower surface of the horizontal support plate 42. This allows for rapid removal of the horizontal support plate 42 after measurement, minimizing the impact of temperature loss on experimental results and ensuring the reliability and accuracy of the test results. Moreover, the support 4 can adapt to specimens of different sizes and positions, further enhancing measurement accuracy.

[0022] In one implementation, the weighing mechanism 3 includes a heat insulation plate fixed to the end face of the workbench and a weighing sensor installed under the heat insulation plate; the temperature measuring mechanism 5 includes an infrared temperature measuring probe; and the height measuring mechanism 6 includes an ultrasonic generator.

[0023] Specifically, by incorporating a heat insulation plate and a weighing sensor in the weighing mechanism 3, the influence of the high-temperature environment on the measurement results is effectively isolated, ensuring the accuracy of the weighing data. The infrared temperature measurement probe enables non-contact measurement of the Marshall specimen temperature, avoiding temperature loss and errors that may occur with contact measurement. The introduction of an ultrasonic generator enables precise measurement of the Marshall specimen height, further improving the reliability and accuracy of the measurement results.

[0024] Figure 3This is a schematic diagram of the structure of the bracket in an embodiment of this application. Figure 3 As shown, in order to achieve the change of the measuring position and height of the bracket 4, in one implementation, the measuring rod 41 has an L-shaped groove 411 vertically formed on it, and a lead screw assembly 412 is provided inside to drive the horizontal support plate 42 to move along the L-shaped groove 411. The horizontal support plate 42 is connected to the lead screw assembly 412 through a nut seat 421. The lead screw assembly 412 is also equipped with a drive assembly 413, which includes a first bevel gear 414 and a second bevel gear 415 that mesh with each other, and a drive motor 416 connected to the second bevel gear 415.

[0025] Specifically, by setting an L-shaped slide groove 411 and a lead screw assembly 412 on the measuring rod 41, the horizontal support plate 42 is precisely moved and positioned in both the vertical and horizontal directions, ensuring stability and accuracy during the measurement process. The design of the drive assembly 413 makes the movement of the horizontal support plate 42 smoother and more controllable, further improving measurement accuracy. The introduction of the drive motor 416 enables automated movement of the horizontal support plate 42, reducing the tediousness and errors of manual operation and improving work efficiency.

[0026] Figure 4 A connection diagram of the controller in an embodiment of this application is shown. Figure 4 As shown, to further enhance the automation of the Marshall specimen molding auxiliary device, in one implementation, the control panel 2 includes a display screen 21 fixedly mounted on the upper part of the workbench 1 and a controller 22 disposed inside the control panel 2. The controller 22 includes a data receiving unit 221, a command sending unit 222, and a storage unit 223. The data receiving unit 221 is electrically connected to the weighing mechanism 3, the temperature measuring mechanism 5, and the height measuring mechanism 6, respectively, and is used to receive measurement data of the Marshall specimen and save it to the storage unit 223. The display screen 21 is used for human-machine interaction and displaying measurement data.

[0027] Specifically, the integrated design of control panel 2 enables centralized reception, processing, and display of Marshall specimen measurement data, simplifying the operation process and improving the efficiency and accuracy of data processing. The electrical connection between data receiving unit 221 and each measuring mechanism ensures real-time transmission and storage of measurement data, avoiding errors that may arise from manual recording and input. Weighing mechanism 3, temperature measuring mechanism 5, and height measuring mechanism 6 are all equipped with data transmission units to transmit measurement data to data receiving unit 221 via wires or wireless signals. The human-machine interface of display screen 21 allows operators to intuitively view and control the measurement process, further enhancing operational convenience and user experience.

[0028] Optionally, the upper part of the workbench 1 is also provided with control buttons for controlling the start, stop, and jog of the Marshall compactor.

[0029] Optionally, a data interface for exporting the measurement data stored in the storage unit 223 is also provided on one side of the control panel 2.

[0030] In order to achieve precise control of the temperature measuring mechanism 5 and the height measuring mechanism 6 during the test, in one implementation, a position sensor is installed on the bracket 4, and the position sensor is electrically connected to the command sending unit 222 and the data receiving unit 221 respectively.

[0031] Specifically, by installing a position sensor on the bracket 4, real-time monitoring and control of the position of the horizontal support plate 42 are achieved, ensuring accurate positioning during the measurement process. The electrical connection between the position sensor and the command sending unit 222 and the data receiving unit 221 allows the position sensor to receive a measurement start command and monitor the horizontal support plate 42 to move to the preset measurement position for measurement, or to receive a measurement completion command and monitor the horizontal support plate 42 to move to the initial position, effectively simplifying the operation steps.

[0032] Preferably, the electrical connection between the data receiving unit 221 and the counting unit of the Marshall compactor enables the synchronous acquisition and processing of measurement data and compaction data, further improving the accuracy and reliability of the measurement results.

[0033] For example, the workflow of the Marshall specimen molding auxiliary device is as follows: Place the Marshall mold and base on the weighing mechanism 3 at the end of the workbench 1, and click "Weigh Zero" and "Height Zero" on the display screen 21 to perform the initialization operation. After the initialization operation is completed, fill the Marshall mold with the mixture and record the weight data of the weighing mechanism 3. When the Marshall specimen is detected on the weighing mechanism 3, the support 4 controls the telescopic measuring rod 41 to lower and the horizontal support plate 42 to the measurement position according to the received measurement command. The average surface temperature of the mixture, i.e., the "compacting temperature", is recorded by the infrared temperature measuring probe on the lower end of the horizontal support plate 42. After the measurement is completed, the support 4 returns to the initial position. After recording the weight and temperature, place the Marshall mold, specimen and base in the Marshall compactor, start the compaction command through the control panel 2, and record the number of compactions on the first and second sides of the Marshall specimen in real time on the display screen 21. After the second compaction is completed, the Marshall mold and specimen are removed from the Marshall compactor and placed back on the weighing mechanism 3. The support 4 is then moved to the measurement position again. The height of the specimen is recorded by the ultrasonic generator, and the average surface temperature of the specimen, i.e., the "forming temperature," is recorded simultaneously by the infrared temperature measuring probe. After the measurement is completed, the first Marshall specimen is formed.

[0034] When a new specimen is formed under this test, the controller 22 performs real-time calculations according to the following formula (1) based on the preset program, and outputs the "recommended weighing" data for the next Marshall specimen. The next specimen repeats the above workflow to complete compaction.

[0035] (1) When the compaction test is finished, click "End Test" on display screen 21 to send the test completion command. The storage unit 223 in controller 22 will automatically record the test data. The test data can be exported from the data port.

[0036] In one implementation, in this embodiment, the bottom of the workbench 1 is equipped with an adjustable height support 7.

[0037] Preferably, the workbench 1 is equipped with four casters 8 at the bottom corners.

[0038] Specifically, by installing an adjustable support base 7 at the bottom of the workbench 1, the height of the workbench 1 can be flexibly adjusted to adapt to different operating environments and needs, thus improving the versatility and applicability of the device. The inclusion of casters 8 makes the movement and positioning of the device more convenient, facilitating its transfer and use between different workplaces, further enhancing the device's flexibility and practicality.

[0039] The specific workflow of this application embodiment is as follows: Preparation includes: turning on the power to the workbench 1 in advance, adjusting the telescopic measuring rod 41 to a suitable height and the horizontal support 42 to a suitable angle according to the size of the formed Marshall, setting up the measurement test on the display 21, and setting the number of single-sided compaction times and compaction height of the Marshall compactor.

[0040] During the actual operation, the Marshall mold and base are placed on the weighing mechanism 3. "Zero Weighing" and "Zero Height" are clicked on the display 21. Then, the mixed material is filled, and "Weighing Record" is clicked on the display 21. The infrared temperature probe of the temperature measuring mechanism 5 simultaneously records the average surface temperature of the mixed material, i.e., the "compaction temperature." After recording the weight and temperature, the Marshall mold, specimen, and base are placed in the Marshall compactor. A compaction command is sent through the command sending unit 222 of the controller 22. At this time, the display 21 records the number of compactions and whether it is the first or second side of the specimen. After the second side is compacted, the Marshall mold and specimen are removed from the Marshall compactor and placed on the weighing mechanism 3. "Height Record" is clicked on the display 21 to record the height of the specimen. The infrared temperature probe simultaneously records the average surface temperature of the specimen, i.e., the "molding temperature." The first specimen is now complete.

[0041] When the compaction test is finished, click "End Test" on display 21, and the instrument's internal database will automatically record the test data. The tester can export the measurement data from storage unit 223 via the data port.

[0042] In summary, the Marshall specimen molding auxiliary device of this application significantly improves the convenience and accuracy of Marshall specimen testing operations through integrated and automated design. By integrating the temperature measurement mechanism, height measurement mechanism, and weighing mechanism, the problem of frequent specimen transfer between multiple workbenches in traditional methods is eliminated, greatly reducing operational steps and improving work efficiency. At the same time, it reduces the risk of accidental damage or data anomalies that may result from repeated specimen movement. Furthermore, the device further reduces the complexity of Marshall specimen testing operations by optimizing the adjustment and use of measuring tools. In conclusion, this Marshall specimen molding auxiliary device, through integrated and automated design, significantly improves the convenience, accuracy, and durability of Marshall specimen testing operations.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A Marshall specimen molding assisting device connected to a Marshall compactor, characterized by, include: The workbench (1), the control panel (2) set on the upper end of the workbench (1), the weighing mechanism (3) and the bracket (4); the bracket (4) includes a telescopic measuring rod (41) installed on the side of the weighing mechanism (3) and a horizontal support plate (42) connected to the upper part of the telescopic measuring rod (41) that can rotate along the horizontal plane, and a temperature measuring mechanism (5) and a height measuring mechanism (6) are installed on the lower end face of the horizontal support plate (42).

2. The Marshall specimen molding auxiliary device as described in claim 1, characterized in that, The control panel (2) includes a display screen (21) fixedly installed on the upper part of the workbench (1) and a controller (22) installed inside the control panel (2). The controller (22) includes a data receiving unit (221), an instruction sending unit (222) and a storage unit (223). The data receiving unit (221) is electrically connected to the weighing mechanism (3), the temperature measuring mechanism (5) and the height measuring mechanism (6) respectively, and is used to receive the measurement data of the Marshall specimen and save it to the storage unit (223). The display screen (21) is used for human-computer interaction and displaying measurement data.

3. The Marshall specimen molding auxiliary device as described in claim 2, characterized in that, A position sensor is installed on the bracket (4), and the position sensor is electrically connected to the command sending unit (222) and the data receiving unit (221) respectively.

4. The Marshall specimen molding auxiliary device as described in claim 2, characterized in that, The data receiving unit (221) is electrically connected to the counting unit of the Marshall compactor.

5. The Marshall specimen molding auxiliary device as described in claim 1, characterized in that, The telescopic measuring rod (41) has an L-shaped groove (411) vertically opened on it, and a screw assembly (412) is provided inside for driving the horizontal support plate (42) to move along the L-shaped groove (411). The horizontal support plate (42) is connected to the screw assembly (412) through a nut seat (421).

6. The Marshall specimen molding auxiliary device as described in claim 5, characterized in that, The lead screw assembly (412) is also equipped with a drive assembly (413), which includes a first bevel gear (414) and a second bevel gear (415) meshing with each other, and a drive motor (416) connected to the second bevel gear (415).

7. The Marshall specimen molding auxiliary device as described in claim 1, characterized in that, The weighing mechanism (3) includes a heat insulation plate fixed to the end face of the workbench and a weighing sensor installed on the lower part of the heat insulation plate; the temperature measuring mechanism (5) includes an infrared temperature measuring probe; the height measuring mechanism (6) includes an ultrasonic generator.

8. The Marshall specimen molding auxiliary device as described in claim 1, characterized in that, The bottom of the workbench (1) is equipped with an adjustable height support base (7).

9. The Marshall specimen molding auxiliary device as described in claim 1, characterized in that, The workbench (1) is equipped with four casters (8) at the bottom corners.

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