A force ductilometer for asphalt material

Abstract

The application discloses a force measuring ductility tester for asphalt material and relates to the technical field of detection equipment. The force measuring ductility tester comprises a water bath box, the inner cavity of the water bath box is provided with a fixed plate at one end, a plurality of uniformly distributed fixed columns A are fixedly arranged on the upper portion of the fixed plate, the inner cavity of the water bath box is provided with a stretching component, a plurality of uniformly distributed asphalt samples are arranged between the fixed columns A and the stretching component, and the stretching component is connected with a control center. The adjusting assembly can adjust the distance between the fixed plate and the sliding assembly, the asphalt sample cannot be bent and stretched, and the ductility detection result of the asphalt sample is effectively improved; when the top block of the sliding assembly is in contact with the pressure sensor, the control center starts to record the displacement data of the asphalt sample, and the ductility detection result of the asphalt sample is further improved; the sliding assembly can effectively improve the stress detection result of the asphalt sample by the asphalt ductility tester; and the pressure sensor and the control center cooperate to record the displacement distance of the broken asphalt sample, manual operation recording is not needed, and the operation is simple.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a force ductility measuring instrument for asphalt materials. Background Technology

[0002] Asphalt is a byproduct of petroleum refining. Directly discarding it would cause environmental pollution and waste of resources. Asphalt can be used in road paving and is one of the essential raw materials for asphalt roads. Before asphalt is used for road paving, it needs to undergo asphalt ductility testing. The asphalt ductility tester is used to test the extensibility of asphalt. The asphalt ductility tester can accurately detect the extensibility of asphalt.

[0003] Current asphalt ductility testing instruments suffer from several drawbacks. Firstly, the tensile device of existing instruments cannot be precisely positioned, resulting in excessively large or small distances between the device and the instrument's fixing plate. This causes the asphalt sample to inevitably bend or stretch during placement, affecting the ductility test results. Secondly, during asphalt ductility testing, operators need to constantly monitor the sample's condition. If a sample breaks, operators must operate the instrument and record the displacement distance, which is extremely inconvenient. Furthermore, while some existing asphalt ductility testing instruments can perform stress tests on asphalt samples, the testing results are poor and the accuracy is low.

[0004] Therefore, we have made improvements to this and proposed a force ductility measuring instrument for asphalt materials. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a force ductility measuring instrument for asphalt materials. This solves the problems of existing technologies where bending or stretching of asphalt samples during placement in the instrument affects the asphalt ductility testing results; the need for operators to record displacement data at the point of fracture of the asphalt sample is inconvenient; and the inability to accurately measure the stress on the asphalt sample.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a force ductility measuring instrument for asphalt materials, comprising a water bath, a fixing plate being fixedly fixed at one end of the inner cavity of the water bath along the width direction of the water bath, a plurality of uniformly distributed fixing columns A being fixedly fixed at the upper part of the fixing plate along the width direction of the water bath, a tensioning component being provided laterally in the inner cavity of the water bath along the width direction of the water bath, the tensioning component being movable along the length direction of the water bath, a plurality of uniformly distributed asphalt samples being provided between the fixing columns A and the tensioning component, one end of the asphalt sample being fitted onto the fixing column A, and the other end of the asphalt sample being fitted onto the tensioning component, the tensioning component being connected to a control center, the control center controlling the tensioning component to stretch the asphalt sample, thereby realizing the elongation test of the asphalt sample and detecting the tensile force borne by the asphalt sample during stretching, so as to evaluate the deformation resistance and durability of the asphalt sample.

[0007] The stretching component includes a sliding plate, a sliding assembly, and an adjusting assembly. The upper surface of the sliding plate is provided with multiple slide rail slots that correspond one-to-one with the fixed column A. Multiple sliding assemblies are provided, and each sliding assembly corresponds one-to-one with a slide rail slot. The sliding assembly is slidably disposed in the slide rail slot and is slidably disposed along the length of the water bath. Two adjusting assemblies are provided and are symmetrically disposed at both ends of the bottom of the sliding plate.

[0008] The inner cavity of the water bath is symmetrically provided with precision lead screws along the length of the water bath. The two ends of the precision lead screws are rotatably set on the two side walls in the width direction of the water bath. One end of the precision lead screw is provided with a low-speed motor. The adjustment component is threadedly driven onto the precision lead screw. The low-speed motor drives the precision lead screw to rotate. The tensioning component is moved along the length of the water bath through the cooperation of the precision lead screw and the adjustment component.

[0009] As a preferred embodiment, the bottom wall of the slide rail block is provided with a sliding groove, and the upper part of the slide rail block is provided with a clearance groove A. The sliding groove and the clearance groove A are connected and the sliding groove and the clearance groove A are closed at the end near the fixed column A.

[0010] The sliding plate is provided with a plurality of clearance grooves B that correspond one-to-one with the slide rail groove blocks. The clearance grooves B are located directly below the inner cavity of the clearance groove A. The sliding groove, clearance groove A and clearance groove B are arranged overlappingly.

[0011] The sliding assembly includes a fixed post B, a slider, and a top block. The fixed post B is fixedly disposed at the upper middle part of the slider, and one end of the top block is threadedly fixedly connected to the middle part of one side wall of the lower surface of the slider.

[0012] The slider is slidably disposed in the sliding groove, the fixed column B is disposed in the clearance groove A, the top block is disposed in the clearance groove B, the fixed column B is disposed in the clearance groove A, and the top block is disposed in the clearance groove B.

[0013] The lower surface of the sliding plate is provided with a plurality of mounting plates corresponding one-to-one with the clearance groove B. The mounting plates are fixedly mounted on the side wall of the sliding plate near the fixed column A. The mounting plates are fixedly equipped with pressure sensors, and the front end of the pressure sensors can be fitted to the top block.

[0014] The sliding surfaces of the slider and sliding groove are smooth, and the sliding surfaces of the slider and sliding plate are also smooth.

[0015] As a preferred embodiment, the outer walls of the fixed column A and the fixed column B are fixedly fitted with support rings. The support rings of the fixed column A and the fixed column B are located on the same plane inside the water bath. The lower surface of the support ring on the fixed column B is spaced apart from the upper surface of the slide rail block.

[0016] The upper surface of the support ring is fixedly provided with a positioning block. The positioning block has a U-shaped ring structure. The fixing post A and the fixing post B are set in the inner cavity of the positioning block. The openings of the positioning block set on the upper part of the fixing post A and the fixing post B are arranged opposite each other.

[0017] As a preferred embodiment, the adjustment assembly includes a threaded sleeve, a sliding sleeve, and a fixed block. The threaded sleeve is threadedly driven onto the precision lead screw, the sliding sleeve is slidably mounted on the threaded sleeve, and the fixed block is fixedly mounted on the outer surface of the sliding sleeve. The fixed block is threadedly fixedly connected to the lower surface of the sliding plate.

[0018] The threaded sleeve is fixedly provided with retaining rings at both ends, which can prevent the sliding sleeve from disengaging from the threaded sleeve;

[0019] The upper surface of the fixing block is provided with a threaded hole in the middle, which is connected to the sliding sleeve. A fixing bolt is threaded into the threaded hole. The end of the fixing bolt is located on the upper surface of the sliding plate, and the front end of the fixing bolt can penetrate the sliding sleeve and be pressed against the outer wall of the threaded sleeve.

[0020] As a preferred embodiment, the threaded sleeve includes an upper threaded half-pipe and a lower threaded half-pipe, which are fastened together, and a fixing block is fixedly mounted on the upper outer wall of the upper threaded half-pipe.

[0021] The upper and lower threaded half-pipes are symmetrically provided with threaded blocks A in the middle of the side walls on both sides along their length. The threaded blocks A of the upper and lower threaded half-pipes can be symmetrically fitted together and are fixedly connected by bolts.

[0022] As a preferred embodiment, threaded blocks B are symmetrically fixed at both ends of the fixed block, and positioning grooves are provided at both ends of the lower surface of the sliding plate. The upper parts of the fixed block and the threaded blocks B are tightly inserted into the positioning grooves, and the threaded blocks B and the sliding plate are fixedly connected by bolts.

[0023] As a preferred embodiment, the asphalt sample includes an asphalt sample body and a mold end mold, with both ends of the asphalt sample body being snapped into the inner cavity at the end of the mold end mold.

[0024] The front end of the mold is provided with a fixing hole. The mold ends of the asphalt sample body are respectively fitted onto the fixing post A and the fixing post B through the fixing hole. The positioning block on the upper part of the support ring can restrict the mold ends and prevent the mold ends from rotating on the fixing post A and the fixing post B, thereby preventing the asphalt sample body from bending.

[0025] As a preferred embodiment, the control center is located on one side of the water bath, and the pressure sensor is electrically connected to the control center. A motor housing is located on the other side of the water bath, with a low-speed motor located in the middle of the inner cavity of the motor housing. A reducer is connected to the upper part of the low-speed motor, and one end of the precision lead screw is rotatably mounted in the motor housing. The reducer is connected to the precision lead screw through multiple meshing gears, which are located in the motor housing. The two precision lead screws rotate in the same direction.

[0026] As a preferred embodiment, the water bath tank has symmetrical slide rail grooves A on both sides of its length direction and slide rail grooves B on both sides of its length direction, with slide rail groove A located above slide rail groove B.

[0027] A glass baffle A is slidably inserted into slide rail A, and a glass baffle B is slidably inserted into slide rail B. One end of glass baffle A can be slidably set at one end of the water bath, and one end of glass baffle B can be slidably set at the other end of the water bath, thereby closing the water bath.

[0028] As a preferred embodiment, the bottom of the water bath is provided with a water channel box, and the inner cavity of the water channel box is provided with a heater, a chiller and a water pump from left to right. The heater, chiller and water pump are connected by pipes. The water pump is connected to the inner cavity of the water bath through a pipe, and the heater is connected to the inner cavity of the water bath through a pipe.

[0029] A flow stabilizer plate is horizontally fixed in the middle of the inner cavity of the water bath tank. The four sides of the flow stabilizer plate are fixedly connected to the inner wall of the water bath tank. The flow stabilizer plate has a mesh structure and is located at the lower part of the tensioning component.

[0030] The present invention has the following beneficial effects:

[0031] The adjusting component of the tensioning component can adjust the distance between the fixed plate and the sliding component, so that the asphalt sample can be loosely and fixedly placed between the fixed plate and the sliding component. The asphalt sample will not bend or be stretched, which effectively improves the ductility test results of the asphalt sample.

[0032] The sliding component slides in the slide rail groove. When the top block of the sliding component contacts the pressure sensor, the control center begins to record the displacement data of the asphalt sample, further improving the ductility test results of the asphalt sample.

[0033] The smooth arrangement of the sliding component and the slide rail block, the spacing between the support ring and the slide rail block, the clearance arrangement between the fixed column B and the clearance groove A, and the clearance arrangement between the top block and the clearance groove B can effectively reduce the influence of friction on the slider, thereby improving the sensitivity of the pressure sensor to the force on the asphalt sample, and thus improving the force detection results of the asphalt ductility tester on the asphalt sample.

[0034] The pressure sensor works in conjunction with the control center to detect the stress condition of the asphalt sample. When the asphalt sample breaks and the pressure sensor can no longer detect the stress condition of the asphalt sample, the control center records the displacement distance of the broken asphalt sample. No manual recording is required, making the operation simple.

[0035] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0036] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0037] Figure 2 for Figure 1 A magnified structural diagram of part A;

[0038] Figure 3 This is a schematic diagram of the fixing plate and fixing column structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the tensioning component structure of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of the stretching component of the present invention from the rear view.

[0041] Figure 6 This is a schematic diagram of the front structure of the sliding plate of the present invention;

[0042] Figure 7 This is a schematic diagram of the back structure of the sliding plate of the present invention;

[0043] Figure 8 This is a schematic diagram of the sliding component structure of the present invention;

[0044] Figure 9 This is a schematic diagram of the adjustment component structure of the present invention;

[0045] Figure 10 This is a schematic diagram of the asphalt sample structure of the present invention;

[0046] In the diagram, 1. Water bath; 2. Fixing plate; 3. Fixing column A; 4. Tensile component; 5. Asphalt sample; 6. Control center; 7. Sliding plate; 8. Sliding assembly; 9. Adjusting assembly; 10. Slide rail block; 11. Precision lead screw; 12. Low-speed motor; 13. Sliding groove; 14. Clearance groove A; 15. Clearance groove B; 16. Fixing column B; 17. Slider; 18. Top block; 19. Mounting plate; 20. Pressure sensor; 21. Support ring; 22. Positioning block; 23. Threaded sleeve; 24. Sliding sleeve. 25. Fixing block; 26. Retaining ring; 27. Fixing bolt; 28. Upper threaded half-pipe; 29. ​​Lower threaded half-pipe; 30. Threaded block A; 31. Threaded block B; 32. Positioning groove; 33. Asphalt sample body; 34. Test mold end mold; 35. Fixing hole; 36. Motor box; 37. Reducer; 38. Gear; 39. Slide rail groove A; 40. Slide rail groove B; 41. Glass baffle A; 42. Glass baffle B; 43. Water box; 44. Heater; 45. Chiller; 46. Water pump; 47. Flow stabilizer. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0049] For examples, please refer to Figures 1 to 10This invention provides a technical solution: a force ductility measuring instrument for asphalt materials, comprising a water bath 1, a fixing plate 2 fixedly fixed at one end of the inner cavity of the water bath 1 along the width direction of the water bath 1, a plurality of uniformly distributed fixing columns A3 fixedly fixed at the upper part of the fixing plate 2 along the width direction of the water bath 1, a tensioning component 4 arranged laterally in the inner cavity of the water bath 1 along the width direction of the water bath 1, the tensioning component 4 being movable along the length direction of the water bath 1, a plurality of uniformly distributed asphalt samples 5 being arranged between the fixing columns A3 and the tensioning component 4, one end of the asphalt sample 5 being fitted onto the fixing column A3, and the other end of the asphalt sample 5 being fitted onto the tensioning component 4, the tensioning component 4 being connected to a control center 6, the control center 6 controlling the tensioning component 4 to stretch the asphalt sample 5, thereby realizing the elongation test of the asphalt sample 5 and detecting the tensile force borne by the asphalt sample 5 during stretching, so as to evaluate the deformation resistance and durability of the asphalt sample 5.

[0050] The stretching component 4 includes a sliding plate 7, a sliding assembly 8, and an adjusting assembly 9. The upper surface of the sliding plate 7 is provided with a plurality of slide rail grooves 10 that correspond one-to-one with the fixed column A3. There are a plurality of sliding assemblies 8, which are arranged one-to-one with the slide rail grooves 10. The sliding assemblies 8 are slidably disposed in the slide rail grooves 10 and are slidably disposed along the length of the water bath 1. There are two adjusting assemblies 9, which are symmetrically disposed at the bottom ends of the sliding plate 7.

[0051] The inner cavity of the water bath 1 is symmetrically provided with precision lead screws 11 along the length direction of the water bath 1. The two ends of the precision lead screws 11 are rotatably set on the two side walls of the water bath 1 in the width direction. One end of the precision lead screws 11 is provided with a low-speed motor 12. The adjustment component 9 is threadedly driven onto the precision lead screws 11. The low-speed motor 12 drives the precision lead screws 11 to rotate. The tensioning component 4 is moved along the length direction of the water bath 1 through the cooperation of the precision lead screws 11 and the adjustment component 9.

[0052] The bottom wall of the slide rail block 10 is provided with a sliding groove 13, and the upper part of the slide rail block 10 is provided with a clearance groove A14. The sliding groove 13 and the clearance groove A14 are connected and the sliding groove 13 and the clearance groove A14 are closed at the end near the fixed column A3.

[0053] The sliding plate 7 is provided with a plurality of clearance grooves B15 that correspond one-to-one with the slide rail groove block 10. The clearance grooves B15 are located directly below the inner cavity of the clearance groove A14. The sliding groove 13, clearance groove A14 and clearance groove B15 are arranged in an overlapping manner.

[0054] The sliding assembly 8 includes a fixed post B16, a slider 17, and a top block 18. The fixed post B16 is fixedly disposed at the upper middle part of the slider 17, and one end of the top block 18 is threadedly fixedly connected to the middle part of one side wall of the lower surface of the slider 17.

[0055] The slider 17 is slidably disposed in the sliding groove 13, the fixed column B16 is disposed in the clearance groove A14, and the top block 18 is disposed in the clearance groove B15. The fixed column B16 is disposed in the clearance groove A14, and the top block 18 is disposed in the clearance groove B15.

[0056] The lower surface of the sliding plate 7 is provided with a plurality of mounting plates 19 corresponding to the clearance grooves B15. The mounting plates 19 are fixedly mounted on the side wall of the sliding plate 7 near the fixed column A3. The mounting plates 19 are fixedly mounted with pressure sensors 20. The front end of the pressure sensors 20 can be attached to the top block 18.

[0057] The sliding surfaces of the slider 17 and the sliding groove 13 are smooth, and the sliding surfaces of the slider 17 and the sliding plate 7 are also smooth.

[0058] The outer walls of the fixed column A3 and the fixed column B16 are fixedly fitted with support rings 21. The support rings 21 of the fixed column A3 and the fixed column B16 are located on the same plane in the inner cavity of the water bath 1. The lower surface of the support ring 21 on the fixed column B16 is spaced apart from the upper surface of the slide rail block 10.

[0059] The upper surface of the support ring 21 is fixedly provided with a positioning block 22. The positioning block 22 has a U-shaped ring structure. The fixing post A3 and the fixing post B16 are disposed in the inner cavity of the positioning block 22. The openings of the positioning block 22 located on the upper part of the fixing post A3 and the fixing post B16 are arranged opposite to each other.

[0060] The adjustment component 9 includes a threaded sleeve 23, a sliding sleeve 24, and a fixing block 25. The threaded sleeve 23 is threadedly driven onto the precision lead screw 11, the sliding sleeve 24 is slidably sleeved onto the threaded sleeve 23, and the fixing block 25 is fixedly disposed on the outer surface of the sliding sleeve 24. The fixing block 25 is threadedly fixedly connected to the lower surface of the sliding plate 7.

[0061] The threaded sleeve 23 is fixedly provided with retaining rings 26 at both ends, and the retaining rings 26 can prevent the sliding sleeve 24 from disengaging from the threaded sleeve 23;

[0062] The upper surface of the fixing block 25 is provided with a threaded hole in the middle, which is connected to the sliding sleeve 24. The threaded hole is threadedly connected to a fixing bolt 27. The end of the fixing bolt 27 is located on the upper surface of the sliding plate 7, and the front end of the fixing bolt 27 can penetrate the sliding sleeve 24 and be pressed against the outer wall of the threaded sleeve 23.

[0063] The threaded sleeve 23 includes an upper threaded half-tube 28 and a lower threaded half-tube 29, which are fastened together, and a fixing block 25 is fixedly installed on the upper outer wall of the upper threaded half-tube 28.

[0064] The upper threaded half-pipe 28 and the lower threaded half-pipe 29 are symmetrically provided with threaded blocks A30 in the middle of the side walls on both sides along the length direction. The threaded blocks A30 of the upper threaded half-pipe 28 and the lower threaded half-pipe 29 can be symmetrically fitted together. The threaded blocks A30 of the upper threaded half-pipe 28 and the lower threaded half-pipe 29 are fixedly connected by bolts.

[0065] The fixed block 25 is symmetrically fixed with threaded blocks B31 at both ends, and the lower surface of the sliding plate 7 is provided with positioning grooves 32 at both ends. The upper parts of the fixed block 25 and the threaded blocks B31 are tightly inserted into the positioning grooves 32, and the threaded blocks B31 and the sliding plate 7 are fixedly connected by bolts.

[0066] The asphalt sample 5 includes an asphalt sample body 33 and a test mold end mold 34. The asphalt sample body 33 is made by an asphalt figure-eight test mold. The test mold end mold 34 is part of the asphalt figure-eight test mold. There are two test mold end molds 34. The two ends of the asphalt sample body 33 are snapped into the inner cavity at the end of the test mold end mold 34. The asphalt figure-eight test mold is existing technology, and its specific structure will not be described in detail here.

[0067] The front end of the test mold 34 is provided with a fixing hole 35. The test molds 34 at both ends of the asphalt sample body 33 are respectively fitted onto the fixing post A3 and the fixing post B16 through the fixing hole 35. The positioning block 22 on the upper part of the support ring 21 can restrict the test mold 34 and prevent the test mold 34 from rotating on the fixing post A3 and the fixing post B16, thereby preventing the asphalt sample body 33 from bending.

[0068] The control center 6 is located on one side of the water bath 1. The pressure sensor 20 is electrically connected to the control center 6. The other side of the water bath 1 is provided with a motor housing 36. The low-speed motor 12 is located in the middle of the inner cavity of the motor housing 36. The upper part of the low-speed motor 12 is connected to a reducer 37. One end of the precision lead screw 11 is rotatably installed in the motor housing 36. The reducer 37 is connected to the precision lead screw 11 through multiple meshing gears 38. The gears 38 are installed in the motor housing 36. The two precision lead screws 11 rotate in the same direction.

[0069] The water bath 1 has symmetrical slide rail grooves A39 on both sides along its length and slide rail grooves B40 on both sides along its length, with slide rail groove A39 located at the upper part of slide rail groove B40.

[0070] A glass baffle A41 is slidably inserted into slide rail groove A39, and a glass baffle B42 is slidably inserted into slide rail groove B40. One end of glass baffle A41 can be slidably disposed at one end of water bath 1, and one end of glass baffle B42 can be slidably disposed at the other end of water bath 1, thereby closing water bath 1.

[0071] The bottom of the water bath 1 is provided with a water channel box 43. The inner cavity of the water channel box 43 is provided with a heater 44, a chiller 45 and a water pump 46 from left to right. The heater 44, the chiller 45 and the water pump 46 are connected by pipes. The water pump 46 is connected to the inner cavity of the water bath 1 by a pipe. The heater 44 is connected to the inner cavity of the water bath 1 by a pipe.

[0072] A flow stabilizing plate 47 is horizontally fixed in the middle of the inner cavity of the water bath 1. The four sides of the flow stabilizing plate 47 are fixedly connected to the inner wall of the water bath 1. The flow stabilizing plate 47 is a mesh plate structure and is located at the lower part of the tensioning member 4.

[0073] Working principle of the invention:

[0074] Water is injected into the water bath 1 so that it covers the upper part of the stretching component 4. Glass baffles A41 and B42 seal the water bath 1. Water pump 46 is started, and the water in the water bath 1 begins to circulate. Heater 44 or chiller 45 is started to control the temperature of the water in the water bath 1 at the preset detection temperature.

[0075] Among them, the flow stabilizer 47 can stabilize the water flow in the water bath 1, making the water surface in the water bath 1 stable. The glass baffle A41 and glass baffle B42 seal the water bath 1 to prevent the loss of the temperature of the clean water in the water bath 1. The upper threaded half tube 28 and the lower threaded half tube 29 of the sliding sleeve 24 are fastened together to facilitate the disassembly and assembly of the stretching component 4.

[0076] Multiple asphalt samples 5 with different properties were made using an asphalt figure-eight mold. The asphalt figure-eight mold after being filled with asphalt was placed in a water bath device to allow the asphalt samples 5 to solidify.

[0077] After the water temperature in the water bath 1 reaches the preset temperature, the low-speed motor 12 rotates in the opposite direction to move the tensile component 4 to the end of the water bath 1 cavity near the fixed column A3. Then, the slider 17 is placed at the end of the sliding groove 13 to prevent the top block 18 from contacting the pressure sensor 20. At the same time, the distance between the fixed column A3 and the fixed column B16 is adjusted by the sliding sleeve 24 and the threaded sleeve 23 so that the distance between the two ends of the asphalt sample 5 is the same as the distance between the fixed column A3 and the fixed column B16. Then, the threaded sleeve 23 and the sliding sleeve 24 are fixed by the fixing bolt 27.

[0078] The fixing holes 35 of the end molds 34 at both ends of the asphalt sample 5 are respectively fitted onto the corresponding fixing posts A3 and B16. The bottom of the end mold 34 is placed on the upper part of the support ring 21. The positioning block 22 can position the end mold 34 to prevent the asphalt sample body 33 from bending. Due to the properties of asphalt, the asphalt sample body 33 is difficult to recover when bent, thus preventing the bent asphalt sample body 33 from touching the pressure sensor 20 through the top block 18 when stretched, which would affect the detection effect.

[0079] When the low-speed motor 12 starts, the low-speed motor 12 slowly drives the precision lead screw 11 to rotate through the reducer 37. The precision lead screw 11 drives the sliding component 8 to move slowly away from the fixed column A3. When the top block 18 moves to the pressure sensor 20 and contacts the pressure sensor 20, the pressure sensor 20 generates a pressure signal. The control center 6 then starts to record the displacement data of the sliding component 8 and the pressure data of the pressure sensor 20.

[0080] All asphalt sample bodies 33 begin to stretch. When any one of the asphalt sample bodies 33 breaks under tension, the pressure sensor 20 of the sliding component 8 connected to it can no longer detect the tension on the asphalt sample body 33. The control center 6 stops recording the displacement distance of the sliding component 8 and the pressure data of the pressure sensor 20, and saves them.

[0081] When all asphalt specimen bodies 33 fracture under tension, the control center 6 controls the low-speed motor 12 to shut down, and the test ends. The staff evaluates the performance of the asphalt specimen bodies 33 based on the tensile displacement data and tensile force data recorded by the control center 6.

[0082] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0083] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A force-ductility measuring instrument for asphalt materials, characterized in that: The device includes a water bath chamber. A fixing plate is horizontally fixed at one end of the inner cavity of the water bath chamber along its width. Multiple evenly distributed fixing posts A are fixed on the upper part of the fixing plate along the width of the water bath chamber. A tensioning component is horizontally arranged in the inner cavity of the water bath chamber along its width. The tensioning component is movable along the length of the water bath chamber. Multiple evenly distributed asphalt samples are arranged between the fixing posts A and the tensioning component. One end of the asphalt sample is fitted onto the fixing post A, and the other end of the asphalt sample is fitted onto the tensioning component. The tensioning component is connected to a control center, which controls the tensioning component to stretch the asphalt sample, thereby realizing the elongation test of the asphalt sample and detecting the tensile force borne by the asphalt sample during stretching, so as to evaluate the deformation resistance and durability of the asphalt sample. The stretching component includes a sliding plate, a sliding assembly, and an adjusting assembly. The upper surface of the sliding plate is provided with multiple slide rail slots that correspond one-to-one with the fixed column A. Multiple sliding assemblies are provided, and each sliding assembly corresponds one-to-one with a slide rail slot. The sliding assembly is slidably disposed in the slide rail slot and is slidably disposed along the length of the water bath. Two adjusting assemblies are provided and are symmetrically disposed at both ends of the bottom of the sliding plate. The inner cavity of the water bath is symmetrically provided with precision lead screws along the length of the water bath. The two ends of the precision lead screws are rotatably set on the two side walls of the water bath in the width direction. One end of the precision lead screw is provided with a low-speed motor. The adjustment component is threadedly driven on the precision lead screw. The low-speed motor drives the precision lead screw to rotate. The tensioning component is moved along the length of the water bath through the cooperation of the precision lead screw and the adjustment component. The sliding assembly includes a fixed post B, a slider, and a top block. The fixed post B is fixedly disposed at the upper middle part of the slider, and one end of the top block is threadedly fixedly connected to the middle part of one side wall of the lower surface of the slider. The lower surface of the sliding plate is provided with multiple mounting plates. The mounting plates are fixedly installed on the side wall of the sliding plate near the fixed column A. The mounting plates are fixedly provided with pressure sensors, and the front end of the pressure sensors can be fitted against the top block. An asphalt sample consists of an asphalt sample body and a mold end mold. The two ends of the asphalt sample body are engaged in the inner cavity at the end of the mold end mold. The front end of the test mold is provided with a fixing hole, and the test molds at both ends of the asphalt sample body are respectively fitted onto the fixing post A and the fixing post B through the fixing hole.

2. The force-ductility measuring instrument for asphalt materials according to claim 1, characterized in that: The bottom wall of the slide rail block is provided with a sliding groove, and the upper part of the slide rail block is provided with a clearance groove A. The sliding groove and the clearance groove A are connected and the sliding groove and the clearance groove A are closed at the end near the fixed column A. The sliding plate is provided with multiple clearance slots B that correspond one-to-one with the slide rail slots, and the clearance slots B are also provided one-to-one with the mounting plate. The clearance groove B is located directly below the inner cavity of the clearance groove A, and the sliding groove, clearance groove A and clearance groove B are arranged overlappingly; The slider is slidably set in the sliding groove, the fixed column B is set in the clearance groove A, the top block is set in the clearance groove B, the fixed column B and the clearance groove A are set in a clearance manner, and the top block and the clearance groove B are set in a clearance manner. The wall surface is smoothed for sliding settings of sliders and sliding grooves, and the wall surface is smoothed for sliding settings of sliders and sliding plates.

3. The force-ductility measuring instrument for asphalt materials according to claim 2, characterized in that: Support rings are fixedly sleeved on the outer walls of fixed column A and fixed column B. The support rings of fixed column A and fixed column B are set on the same plane in the inner cavity of the water bath. The lower surface of the support ring set on fixed column B is spaced apart from the upper surface of the slide rail groove block. A positioning block is fixedly provided on the upper surface of the support ring. The positioning block has a U-shaped ring structure. Fixed column A and fixed column B are set in the inner cavity of the positioning block. The openings of the positioning blocks located on the upper part of fixed column A and fixed column B are arranged opposite each other.

4. The force-ductility measuring instrument for asphalt materials according to claim 2, characterized in that: The adjustment assembly includes a threaded sleeve, a sliding sleeve, and a fixed block. The threaded sleeve is threadedly driven onto the precision lead screw, the sliding sleeve is slidably mounted on the threaded sleeve, and the fixed block is fixedly mounted on the outer surface of the sliding sleeve. The fixed block is threadedly fixedly connected to the lower surface of the sliding plate. The threaded sleeve is fixedly equipped with retaining rings at both ends, which can prevent the sliding sleeve from disengaging from the threaded sleeve; The upper surface of the fixed block is provided with a threaded hole in the middle, which is connected to the sliding sleeve. A fixing bolt is threaded into the threaded hole. The end of the fixing bolt is located on the upper surface of the sliding plate, and the front end of the fixing bolt can penetrate the sliding sleeve and be pressed against the outer wall of the threaded sleeve.

5. A force-ductility measuring instrument for asphalt materials according to claim 4, characterized in that: The threaded sleeve includes an upper threaded half-pipe and a lower threaded half-pipe, which are fastened together, and a fixing block is fixedly installed on the upper outer wall of the upper threaded half-pipe. Threaded blocks A are symmetrically provided in the middle of the side walls on both sides along the length of the upper and lower threaded half-pipes. The threaded blocks A of the upper and lower threaded half-pipes can be symmetrically fitted together and are fixedly connected by bolts.

6. The force-ductility measuring instrument for asphalt materials according to claim 4, characterized in that: The fixed block has threaded blocks B fixedly fixed at both ends symmetrically, and the lower surface of the sliding plate has positioning grooves at both ends. The upper parts of the fixed block and the threaded blocks B are tightly inserted into the positioning grooves, and the threaded blocks B and the sliding plate are fixedly connected by bolts.

7. A force-ductility measuring instrument for asphalt materials according to claim 2, characterized in that: The control center is located on one side of the water bath. The pressure sensor is electrically connected to the control center. The other side of the water bath is equipped with a motor housing. The low-speed motor is located in the middle of the inner cavity of the motor housing. A reducer is connected to the upper part of the low-speed motor. One end of the precision lead screw is rotatably mounted in the motor housing. The reducer is connected to the precision lead screw through multiple meshing gears. The gears are located in the motor housing. The two precision lead screws rotate in the same direction.

8. A force-ductility measuring instrument for asphalt materials according to claim 1, characterized in that: The water bath tank has symmetrical slide rail grooves A on both sides along its length and slide rail grooves B on both sides along its length, with slide rail groove A located above slide rail groove B. A glass baffle A is slidably inserted into slide rail A, and a glass baffle B is slidably inserted into slide rail B. One end of glass baffle A can be slidably set at one end of the water bath, and one end of glass baffle B can be slidably set at the other end of the water bath, thereby closing the water bath.

9. A force-ductility measuring instrument for asphalt materials according to claim 1, characterized in that: The bottom of the water bath is equipped with a water circuit box. The inner cavity of the water circuit box is equipped with a heater, a chiller and a water pump from left to right. The heater, chiller and water pump are connected by pipes. The water pump is connected to the inner cavity of the water bath through a pipe. The heater is connected to the inner cavity of the water bath through a pipe. A flow stabilizer plate is horizontally fixed in the middle of the inner cavity of the water bath. The four sides of the flow stabilizer plate are fixedly connected to the inner wall of the water bath. The flow stabilizer plate has a mesh structure and is located at the lower part of the tensioning component.

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