Specimen conditioner and accessory cleaning device for dynamic shear rheological tests of asphalt

Abstract

The present invention provides a design concept of a specimen trimmer and an accessory cleaning device for a dynamic shear rheology test of asphalt. The specimen trimmer has a temperature control and heating function, and is suitable for scraping samples of different types of asphalt; the accessory cleaning device can thoroughly clean a full set of dynamic shear rheology test accessories at one time through a cleaning method combining heating with ultrasonic high-frequency mechanical oscillation and a design of a supporting structure; the overall columnar structure design reduces the equipment footprint and the amount of detergent used, and minimizes the harm of volatile detergents to the physical and mental health of test personnel; the above-mentioned specimen trimmer and accessory cleaning device for the dynamic shear rheology test of asphalt can save the time for scraping samples and cleaning accessories in the dynamic shear rheology test, improve the test efficiency, and ensure the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of rheological property detection of asphalt materials, and in particular to a specimen trimmer and an accessory cleaning device for a dynamic shear rheological test of asphalt. Background Art

[0002] The dynamic shear rheometer is a precision instrument used in the Strategic Highway Research Program (SHRP) of the United States to test the rheological properties of asphalt binders. It can perform a variety of tests such as PG grading, multi-stress creep recovery, viscosity measurement, and frequency scanning of base asphalt or modified asphalt. Before the dynamic shear rheology test, the asphalt sample is squeezed to a set thickness by the upper and lower clamps, and the asphalt overflowing the circular outer edge of the upper and lower clamps needs to be scraped with a specimen trimmer. After the test is completed, the asphalt on the upper and lower clamps, wrenches, and specimen trimmers is often in a viscous state and difficult to clean.

[0003] When the existing specimen trimmer trims SBS modified asphalt, rubber modified asphalt and other samples with high viscosity at room temperature, it is easy to stick to the asphalt sample, which increases the difficulty of operation, reduces the trimming efficiency, affects the scraping effect, and may even damage the sample and affect the test results. At present, the cleaning of dynamic shear rheology test accessories mostly adopts the method of soaking in organic solvents (trichloroethylene solution, kerosene, diesel, etc.) and then wiping one by one, which is time-consuming and labor-intensive, inefficient, and the test personnel are in contact with highly volatile organic solvents for a long time, which affects their health. In particular, the lower fixture of the dynamic shear rheology test is composed of a cylinder and a thin hexagonal sheet. The diameter of the cylinder is 8mm and 25mm according to the test requirements. In the test, a large amount of asphalt is easily attached to the transition between the cylinder and the thin hexagonal sheet, and it is difficult to clean thoroughly with traditional cleaning methods.

[0004] In summary, the present application proposes a specimen trimmer and accessory cleaning device for asphalt dynamic shear rheology test, so as to improve the efficiency and quality of the scraping and cleaning steps in the dynamic shear rheology test and reduce time waste. Summary of the invention

[0005] In view of the deficiencies in the prior art, the technical problem that the present invention intends to solve is to provide a specimen trimmer and an accessory cleaning device for asphalt dynamic shear rheology test.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A specimen trimmer and accessory cleaning device for dynamic shear rheology test of asphalt, the specimen trimmer comprising a blade body, a blade head and a handle, the accessory cleaning device being columnar as a whole, comprising a base, a cleaning chamber, a supporting structure and an upper cover, characterized in that the specimen trimmer also comprises a heating component and a temperature regulating component, the temperature regulating component can adjust the heating temperature of the heating component to adapt to the scraping operation of different types of asphalt, an ultrasonic generator and a heating plate are installed inside the base of the accessory cleaning device, a cleaning agent is built into the cleaning chamber to achieve a cleaning method combining heating with ultrasonic high-frequency mechanical oscillation, the supporting structure comprises an annular bracket, a silicone pad and a lower clamp bracket, the accessory grooves of different shapes on the side of the silicone pad are convenient for the placement and use of each accessory before and after cleaning, and are located on the upper part of the cleaning chamber as a whole through the supporting structure.

[0008] The handle is located on the side of the upper part of the blade body facing away from the blade head. The handle is in a wave shape suitable for human hand grasping and is wrapped with rubber material.

[0009] The heating assembly includes a battery, a heating wire, a resistor, and a connection point; the battery is located inside the handle, the heating wire is located at the blade head and the lower part of the blade body, and three different resistors are installed inside the blade body and are connected in series with the battery and the heating wire through three different connection points, and the connection point farthest from the blade head is not connected to the heating circuit.

[0010] The temperature control component includes a slide rail, a push head, a slide plate, and a pressure ball; the slide rail is located in the middle of the blade body and on the same side as the blade head, the push head, the slide plate, and the pressure ball are a unified whole, the push head and the slide plate are respectively on the upper and lower sides of the slide rail, and the pressure ball is located at the lower part of the slide plate. When the push head is pushed, the slide plate drives the pressure ball to translate along the direction of the blade body; after the pressure ball contacts the connection point connected in series with the battery and the heating wire, it will generate pressure on the connection point, thereby connecting different heating circuits. If the pressure ball is located at the connection point farthest from the blade head, the circuit will not be connected.

[0011] The ultrasonic generator is located in the lower space inside the base, the heating plate is located in the lower part of the base and the internal space of the annular wall, the plug port is located at the rear of the base, and the operation panel of the ultrasonic and heating plates is located at the front of the base; the cleaning chamber has a built-in cleaning agent, is located above the base, and the lower part is surrounded by the annular wall of the base; the supporting structure includes an annular bracket, a silicone pad, and a lower clamp bracket, the outer diameter of the upper part of the annular bracket is larger than the inner diameter of the cleaning chamber, and the lower part has an annular silicone pad support, the silicone pad can be placed inside the annular bracket, and the whole is located at the upper part of the cleaning chamber; the side of the silicone pad has accessory grooves of different shapes, and accessories such as a specimen trimmer, a wrench, an air column, and a lower clamp bracket can be fixed on the annular bracket, the clamp groove on the annular bracket is used to place the lower clamp, and the top of the silicone pad is a silicone pad handle, which is used to lift the silicone pad to complete the placement and use of each accessory before and after cleaning; the upper cover is cylindrical, and the upper cover handle is located at the top of the upper cover.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention provides a design concept of a specimen trimmer and an accessory cleaning device for a dynamic shear rheology test of asphalt. The specimen trimmer has a temperature control and heating function, and is suitable for scraping samples of different types of asphalt; the accessory cleaning device can thoroughly clean a full set of dynamic shear rheology test accessories at one time through a cleaning method combining heating with ultrasonic high-frequency mechanical oscillation and a design of a supporting structure; the overall columnar structure design reduces the equipment footprint and the amount of detergent used, and minimizes the harm of volatile detergents to the physical and mental health of test personnel; the above-mentioned specimen trimmer and accessory cleaning device for the dynamic shear rheology test of asphalt can save the time for scraping samples and cleaning accessories in the dynamic shear rheology test, improve the test efficiency, and ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the overall structure of the test piece trimmer of the present invention;

[0016] Figure 3 It is a schematic diagram of the internal structure of the test piece dresser of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the temperature regulating component of the present invention;

[0018] Figure 5 It is a schematic diagram of the overall structure of the accessory cleaning device of the present invention;

[0019] Figure 6 It is a schematic diagram of the internal structure of the accessory cleaning device of the present invention without the upper cover;

[0020] Figure 7 It is a schematic structural diagram of the annular bracket, the silicone pad and the lower clamp bracket of the accessory cleaning device of the present invention;

[0021] Figure 8 It is a schematic structural diagram of the silicone pad and the lower fixture bracket of the accessory cleaning device of the present invention;

[0022] Fig. 9 It is a schematic structural diagram of the annular bracket of the accessory cleaning device of the present invention;

[0023] Fig.10 It is a structural schematic diagram of the base of the accessory cleaning device of the present invention;

[0024] Fig.11 It is a schematic diagram of the silicone pad of the accessory cleaning device of the present invention, the lower fixture bracket and the matching dynamic shear rheology test accessories;

[0025] In the figure, 1-blade body; 2-blade head; 3-handle; 4-battery; 5-heating wire; 6-resistor; 7-connection point; 8-slide rail; 9-push head; 10-slide; 11-pressure ball; 12-base; 13-cleaning chamber; 14-upper cover; 15-ultrasonic generator; 16-heating plate; 17-plug port; 18-operation panel; 19-ring bracket; 20-silicone pad; 21-lower clamp bracket; 22-silicone pad handle; 23-upper cover handle; 24-wrench; 25-air column; 26-lower clamp; 701-first connection point; 702-second connection point; 703-third connection point; 704-fourth connection point; 1901-ring silicone pad support. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments, which are not intended to limit the protection scope of the present application.

[0027] The present invention is a specimen trimmer and accessory cleaning device for asphalt dynamic shear rheology test (see Figure 1-11 ), the specimen trimmer includes a blade body 1, a blade head 2, and a handle 3. The accessory cleaning device is columnar as a whole, including a base 12, a cleaning chamber 13, a support structure, and an upper cover 14. It is characterized in that the specimen trimmer also includes a heating component and a temperature control component. The temperature control component can adjust the heating temperature of the heating component to adapt to the scraping operation of different types of asphalt. An ultrasonic generator 15 and a heating plate 16 are installed inside the base 12 of the accessory cleaning device. The cleaning chamber 13 has a built-in cleaning agent to achieve a cleaning method of combining heating with ultrasonic high-frequency mechanical oscillation. The support structure includes an annular bracket 19, a silicone pad 20, and a lower clamp bracket 21. The accessory grooves of different shapes on the side of the silicone pad 20 are convenient for the placement and use of each accessory before and after cleaning, and are located on the upper part of the cleaning chamber 13 through the support structure.

[0028] The handle 3 is located on the upper part of the blade body 1, facing away from the blade head 2. The wavy handle 3 is suitable for human hand gripping. The rubber material wrapped on the handle 3 has the functions of increasing friction and heat insulation and electrical insulation.

[0029] The heating assembly includes a battery 4, a heating wire 5, a resistor 6, and a connection point 7;

[0030] The battery 4 is located inside the handle 3, and the heating wire 5 is located at the lower part of the blade head 2 and the blade body 1. Only the part in contact with the specimen is heated, which is highly efficient and energy-saving; three different resistors 6 are installed inside the blade body 1, and are connected in series with the battery 4 and the heating wire 5 through the second connection point 702, the third connection point 703, and the fourth connection point 704, respectively. The resistors 6 connected to the circuit are different, and the heating power of the heating wire 5 is different, which can provide three different temperature gears for the specimen trimmer. The heating gears from small to large are respectively suitable for asphalts with softening points from low to high. The first connection point 701, which is farthest from the blade head, is not connected to the heating circuit;

[0031] The temperature adjustment component includes a slide rail 8, a push head 9, a slide plate 10, and a pressure ball 11;

[0032] The slide rail 8 is located at the middle of the blade body 1 and on the same side as the blade head 2. The push head 9, the slide plate 10, and the pressure ball 11 are a unified whole. The push head 9 and the slide plate 10 are respectively on the upper and lower sides of the slide rail 8. The pressure ball 11 is located at the lower part of the slide plate 10. When the push head 9 is pushed, the slide plate 10 drives the pressure ball 11 to move in the direction of the blade body 1. After the pressure ball 11 contacts the second connection point 702, the third connection point 703, and the fourth connection point 704 connected in series with the battery 4 and the heating wire 5, pressure is generated thereon, thereby connecting different heating circuits. If the pressure ball 11 is located at the first connection point 701, the heating component does not work, so the switch and temperature of the heating component can be controlled and adjusted by the push head 9;

[0033] The accessory cleaning device includes a base 12, a cleaning chamber 13, a supporting structure, and an upper cover 14;

[0034] An ultrasonic generator 15 and a heating plate 16 are installed inside the base. The ultrasonic generator 15 is located in the lower space inside the base 12. The heating plate 16 is located in the lower part of the base 12 and the inner space of the ring wall. It can fully and evenly heat the cleaning agent (trichloroethylene, kerosene, diesel, etc.) in the cleaning cavity 13 on the base 12. The plug port 17 is located at the rear of the base 12 to connect the power supply to power the accessory cleaning device. The operation panel 18 of the ultrasonic generator 15 and the heating plate 16 is located at the front of the base 12.

[0035] The supporting structure includes an annular bracket 19, a silicone pad 20, and a lower fixture bracket 21; the outer diameter of the upper part of the annular bracket 19 is larger than the inner diameter of the cleaning chamber 13, and there is an annular silicone pad support 1901 at the lower part, so the silicone pad 20 can be placed inside the annular bracket 19 so that it is located as a whole at the upper part of the cleaning chamber. There are accessory grooves of different shapes on the side of the silicone pad 20, and accessories such as the specimen trimmer, wrench 24, air column 25, and lower fixture bracket 21 can be fixed on the annular bracket 19; the top of the silicone pad 20 is a silicone pad handle 22, which is used to lift the silicone pad 20 to complete the placement and use of each accessory before and after cleaning; the upper cover 14 is cylindrical, and the upper cover handle 23 is located at the top of the upper cover 14, which can reserve space for accessories while preventing the escape of volatile detergents to the greatest extent.

[0036] The battery 4 is a rechargeable lithium battery, which is light in weight, long in life and low in pollution.

[0037] The push head 9 is thicker on the side close to the cutter head 2 and has anti-skid protrusions on the surface, making the operation smoother and more comfortable.

[0038] When the sound waves emitted by the ultrasonic generator 15 act on the surface of the accessory to be cleaned, a vibration effect is generated, causing the surrounding detergent to flow and generate a large number of bubbles. The bubbles cover the accessory layer by layer, and are first scrubbed with the help of the shear force of high-speed vibration; when the bubbles reach a certain air pressure and explode, the pressure peak generated can break up the residual asphalt attached to the accessory and make it fall off, thereby achieving high-quality, efficient and comprehensive cleaning.

[0039] The operation panel 18 has control and display functions, and can control the switches of the ultrasonic generator 15 and the heating plate 16 and display relevant parameters at the same time.

[0040] The fixture groove on the lower fixture bracket 21 is used to place the lower fixture 26 for dynamic shear rheology test. This structure allows the lower fixture 26 to be cleaned efficiently and thoroughly.

[0041] The powerful cleaning ability of the combination of ultrasound and heating can extend the service life of the cleaning agent in the cleaning chamber 13 and effectively reduce waste. When replacing the cleaning agent, only the annular bracket 19 and its upper structure need to be lifted to remove the cleaning chamber 13 from the base 12 to complete the cleaning agent replacement.

[0042] The overall cylindrical shape of the accessory cleaning device and the design of inserting the accessory into the side groove of the silicone pad 20 make full use of the space, while giving good support to the accessory, combined with the characteristic that silicone is not easy to adhere to asphalt, effectively reducing the difficulty of cleaning the device.

[0043] The working principle and workflow of the present invention are:

[0044] In the dynamic shear rheology test, in the initial state, the pressure ball 11 of the specimen trimmer is located at the first connection point 701, and the heating circuit is not connected. According to the type of specimen, select the corresponding specimen trimmer heating gear, hold the handle 3, push the push head 9 so that the slide 10 drives the pressure ball 11 to move horizontally along the direction of the blade 1 to the connection point 7 of the required heating gear, and the pressure of the pressure ball 11 on the required connection point 7 connects the heating circuit composed of the battery 4, the heating wire 5 and the connection point 7, and the heating wire 5 heats the blade head 2 and the lower part of the blade 1, so that the scraping operation can be completed quickly and efficiently. After the scraping is completed, push the push head 9 to return the pressure ball 11 to the connection point 7 and stop heating.

[0045] In the dynamic shear rheology test accessories cleaning operation, first open the upper cover 14, pull up the silicone pad 20 and insert the specimen trimmer, wrench 24, air column 25, lower fixture bracket 21, etc. into the accessory slot corresponding to the side of the silicone pad 20, place the lower fixture 26 in the fixture slot on the lower fixture bracket 21, and then put the silicone pad with the accessories installed into the annular bracket 19, close the upper cover 14, turn on the power, turn on the switch of the ultrasonic generator 15 and the heating plate 16 through the operation panel 18 and set the duration, temperature and other parameters. After cleaning is completed, disconnect the power, open the upper cover 14, pull up the silicone pad 20 to remove the accessories and then close the upper cover 14.

[0046] Any matters not described in the present invention are applicable to the prior art.

Claims

1. A specimen trimmer and accessory cleaning device for asphalt dynamic shear rheology test, the specimen trimmer includes a blade body, a blade head and a handle, the accessory cleaning device is cylindrical as a whole, including a base, a cleaning chamber, a support structure and an upper cover, characterized in that: The specimen conditioner also includes a heating component and a temperature control component. An ultrasonic generator and a heating plate are installed inside the base of the accessory cleaning device. A cleaning agent is built into the cleaning chamber. The supporting structure includes a ring bracket, a silicone pad, and a lower fixture bracket. The accessory grooves of different shapes on the side of the silicone pad match the various accessories and are located at the upper part of the cleaning chamber as a whole through the supporting structure. The heating assembly includes a battery, a heating wire, a resistor, and a connection point. The battery is located inside the handle, the heating wire is located at the blade head and the lower part of the blade body, and three different resistors are installed inside the blade body and are connected in series with the battery and the heating wire through three different connection points. The connection point farthest from the blade head is not connected to the heating circuit. The temperature control component includes a slide rail, a push head, a slide plate, and a pressure ball. The slide rail is located in the middle of the blade body and on the same side as the blade head. The push head, the slide plate, and the pressure ball are a unified whole. The push head and the slide plate are respectively on the upper and lower sides of the slide rail, and the pressure ball is located under the slide plate. When the push head is pushed, the slide plate drives the pressure ball to translate along the direction of the blade body. After the pressure ball contacts the connection point connected in series with the battery and the heating wire, it will generate pressure on the connection point, thereby connecting different heating circuits. If the pressure ball is located at the connection point farthest from the blade head, the circuit will not be connected.

2. A specimen trimmer and accessory cleaning device for asphalt dynamic shear rheology test according to claim 1, characterized in that: The handle is located on the side of the upper part of the blade body facing away from the blade head. The handle is in a wave shape suitable for human hand grasping and is wrapped with rubber material.

3. A specimen trimmer and accessory cleaning device for asphalt dynamic shear rheology test according to claim 1, characterized in that: The ultrasonic generator is located in the lower space inside the base, the heating plate is located in the lower part of the base and the internal space of the annular wall, the wire plug port is located at the rear of the base, the operation panel of the ultrasonic and heating plates is located at the front of the base, the cleaning chamber has a built-in cleaning agent, is located above the base, and the lower part is surrounded by the annular wall of the base, the supporting structure includes an annular bracket, a silicone pad, and a lower clamp bracket, the outer diameter of the upper part of the annular bracket is larger than the inner diameter of the cleaning chamber, and the lower part is provided with an annular silicone pad support, the side of the silicone pad has accessory grooves of different shapes matching the specimen trimmer, wrench, air column, and lower clamp bracket, the clamp groove on the annular bracket is used to place the lower clamp, the top of the silicone pad is a silicone pad handle, the upper cover is cylindrical, and the upper cover handle is located at the top of the upper cover.

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