A measuring device for measuring the penetration of modified bitumen and a method of using the same

Abstract

The application belongs to the technical field of material detection, and relates to a modified asphalt penetration measuring device and a use method thereof, which comprises the following: a limit rod one is connected to the lower side of a mounting frame, the distance between the center of a standard needle mounted on a measuring head assembly and the lower end of the limit rod one is greater than or equal to 10 mm, and the lowest point of the limit rod one is higher than the standard needle mounted on the measuring head assembly; two opposite limit rods two are slidably arranged on the mounting frame and located on both sides of the position between the limit rod two and the standard needle on the measuring head assembly. The limit of the limit rod one makes the distance between the test point of the standard needle on the asphalt and the edge of the sample container greater than or equal to 10 mm, avoids the edge effect, ensures that the test point is close to the central region of the asphalt, and improves the measurement accuracy; in addition, the two limit rods two center and limit the sample container and stabilize the sample container, so that the angle of adjacent standard needles is close to 120 DEG, and the distance between the test points is greater than or equal to 10 mm, thereby avoiding mutual influence.

Description

Technical Field

[0001] This invention belongs to the field of materials testing technology, and specifically relates to a measuring device for the penetration of modified asphalt and its usage method. Background Technology

[0002] Modified asphalt is a type of asphalt in which different materials are added to ordinary asphalt to improve its properties. This type of asphalt has higher durability, better temperature stability, and stronger fatigue resistance, and is widely used in road construction and waterproofing projects.

[0003] Penetration is an important indicator for measuring the hardness of asphalt. It is determined by measuring the depth to which a standard needle is inserted vertically into an asphalt sample under certain conditions (such as time, temperature, and load). For modified asphalt, accurate penetration measurement helps to assess the quality and suitability of the material, ensuring that its performance meets requirements under different environmental conditions.

[0004] For example, patent CN106525660B discloses an asphalt penetration meter and its usage method. This asphalt penetration meter has a mesh support inside the thermally conductive ceramic inner shell for placing the sample dish. During penetration measurement, the standard needle approaches the surface of the sample dish, and then the synchronization button is pressed, causing the standard needle and the load to fall simultaneously for 5 seconds. Although the penetration measurement can be completed normally, it requires human observation of the distance between each test point and the distance between the test point and the edge of the sample dish. It also cannot help to align the position of the sample dish. If the measurement points are too close, they will interfere with each other. If the measurement points are too close to the edge of the sample dish, it will cause an edge effect, affecting the measurement accuracy.

[0005] In view of the shortcomings of the existing technology, a measuring device and its usage method for modified asphalt penetration are designed to overcome the shortcomings of the existing technology, avoid the distance between the test point and the edge of the sample dish being too close, avoid the spacing between the measurement points being too close, prevent edge effects and mutual interference, and improve the measurement accuracy. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a measuring device and its method for measuring the penetration of modified asphalt, which avoids the distance between the test point and the edge of the sample dish being too close, and also avoids the spacing between the measurement points being too close, thus preventing edge effects and mutual interference and improving measurement accuracy.

[0007] To address the aforementioned technical problems, this invention provides a device for measuring the penetration of modified asphalt, comprising a main control console, a flat-bottomed container mounted on the main control console, and a lifting drive assembly. The flat-bottomed container contains a support member for supporting a sample dish. The support member raises the lower side of the sample dish containing asphalt to a distance of 50mm from the bottom of the flat-bottomed container, and the lower side of the sample dish on the support member is 100mm from the surface of the constant-temperature water in the flat-bottomed container. The lifting drive assembly has a measuring head assembly mounted on a mounting frame above the flat-bottomed container. The measuring head assembly is used to mount a standard needle and to measure the penetration of the asphalt in the sample dish using the standard needle. The lower side of the mounting frame is connected to… A limiting rod 1 is located directly to the right of the standard needle on the measuring head assembly. The lower end of the limiting rod 1 extends vertically upwards towards the top of the flat-bottomed container. The furthest distance between the center of the standard needle mounted on the measuring head assembly and the lower end of the limiting rod 1 is ≥10mm. The lowest point of the limiting rod 1 is higher than the lowest point of the standard needle mounted on the measuring head assembly. Two opposing limiting rods 2 slide on the mounting frame. The two limiting rods 2 are located on the front and rear sides of the position between the limiting rod 1 and the standard needle on the measuring head assembly, respectively. The two limiting rods 2 are driven to move towards each other by a linear drive group, which is located on the mounting frame. The lowest point of the limiting rod 2 is lower than the lowest point of the standard needle mounted on the measuring head assembly.

[0008] Preferably, the linear drive assembly includes two left and right opposing guide rails connected to the mounting frame. A rack slides on the side of each guide rail that is close to each other. Two limit rods are respectively connected to the left and right racks. A gear meshes between the two racks and rotates on the mounting frame. A drive motor is mounted on the mounting frame, and the output shaft of the drive motor is connected to the gear.

[0009] Preferably, the lifting drive assembly includes a guide column connected to the main control console. The guide column is rotatably mounted with a lead screw via two opposing bearings. A nut that slides on the guide column is threaded onto the lead screw. A mounting bracket is connected to one side of the nut. A servo motor is mounted on the guide column.

[0010] Preferably, the support includes two front-to-back guide beams connected to the inner wall of the flat-bottomed container. The extension direction of the two guide beams is parallel to the line connecting the standard needle to the limiting rod on the measuring head assembly. A sliding sleeve slides between the two guide beams on their adjacent sides. A support plate for supporting the sample dish rotates on the sliding sleeve. The center of the support plate coincides with the infinite extension line between the standard needle and the limiting rod on the measuring head assembly. The middle part of the support plate is recessed downward to form a support groove for placing the sample dish. The support groove has multiple through holes for the flow of constant temperature water. Three limiting blocks suitable for limiting the position of the sample dish are connected to the support groove of the support plate.

[0011] Preferably, the support further includes three circumferentially spaced and evenly arranged locking blocks that are embedded and slidably disposed on the sliding sleeve. A spring located inside the sliding sleeve connects the locking blocks to the sliding sleeve. The spring is used to reset the sliding locking blocks. The support plate has three circumferentially spaced and evenly arranged slots, which correspond one-to-one with the three locking blocks.

[0012] Preferably, the measuring head assembly includes a mounting post connected to a mounting bracket, a mounting block connected to the lower part of the mounting post, a needle connecting rod for mounting a standard needle sliding on the mounting block, a sleeve sliding around the needle connecting rod on the mounting block, one side of the inner side of the sleeve protruding to contact and engage with 2 / 1 of the outer side of the needle connecting rod, a button part and a magnetic attraction part on the left and right sides of the sleeve respectively, a second spring around the magnetic attraction part connected between the sleeve and the mounting block, the second spring being used to reset the sleeve after sliding, an electromagnet suitable for magnetic engagement with the magnetic attraction part is mounted on the mounting post, and a laser rangefinder is mounted on the upper left side of the mounting post.

[0013] Preferably, the needle connecting rod includes a sleeve that slides on the mounting block. The lower end of the sleeve has a socket suitable for inserting a standard needle. A fastening bolt is threaded onto the socket of the sleeve. The lower part of the sleeve has a partial protrusion, and a weight surrounding the sleeve is supported on the protrusion. The weight is used to increase the weight. The upper part of the sleeve has a receiving cavity, and a counterweight is placed inside the receiving cavity. A T-shaped nut for plugging the upper receiving cavity of the sleeve is threaded onto the upper end of the sleeve.

[0014] Preferably, it also includes an electric guide rail installed inside the mounting column. The slider of the electric guide rail is connected to a lifting plate that slides through the mounting column. The lifting plate is located on the lower side of the T-shaped nut. A contact sensor is embedded on the upper side of the lifting plate. The contact sensor is electrically connected to the controller in the host console. The electromagnet is also electrically connected to the controller in the host console. Initially.

[0015] The present invention also provides a method for using the above-mentioned device for measuring the penetration of modified asphalt, comprising: S1) installing a standard needle onto the measuring head assembly, and placing a sample dish containing asphalt on a support in a flat-bottomed container; S2) controlling the lifting drive group to drive the measuring head assembly downward and move the standard needle downward to near the upper surface of the asphalt in the sample dish, while simultaneously moving the limiting rod one to the inner ring of the sample dish; S3) adjusting the position of the sample dish so that the inner wall of the sample dish contacts the outer side of the limiting rod one, and using the limiting rod one to ensure that the distance between the test point of the standard needle on the asphalt and the edge of the sample dish is ≥10mm; S4) bringing the two limiting rods two closer together to center and align the sample dish, and using the cooperation of the limiting rod one to limit the front-back and left-right positions of the sample dish; S5) using the operation of the measuring head assembly to make the standard needle drop vertically for 5 seconds under a load of 100 grams to measure the asphalt penetration; S6) after the measurement is completed, releasing the standard needle from the measuring head assembly, and controlling the lifting drive group to drive the measuring head assembly upward to reset.

[0016] The beneficial effects that this invention can achieve by overcoming the shortcomings of the prior art include:

[0017] 1. Using the limiting rod one, the distance between the test point of the standard needle on the asphalt and the edge of the sample container is ≥10mm, avoiding edge effects and ensuring that the test point is close to the center of the asphalt, thus improving measurement accuracy. In addition, the two limiting rods two center and stabilize the sample container. Therefore, it is only necessary to ensure that the angle between adjacent standard needles is close to 120° to further ensure that the distance between each test point is ≥10mm and avoid mutual interference.

[0018] 2. After each standard needle is used, simply rotate the support plate. The cooperation of the locking block and the locking slot achieves an automatic 120° rotation positioning effect, accurately ensuring that the angle interval between the three standard needles is 120°. This avoids the interference between different test points due to excessively close distances, ensuring that each measurement value is independent and accurate. It is also easy to operate, eliminating the tedious manual steps of rotating and adjusting the sample dish, avoiding inaccuracies caused by visual observation, and eliminating the need for external measuring tools.

[0019] 3. With the cooperation of the lifting plate and the contact sensor, the needle rod is automatically moved upward and reset stably. There is no need for manual pressing of the button or manual support of the needle rod to move upward. This avoids the impact on the standard needle on the asphalt caused by accidental downward movement of a small distance when the needle rod is touched by the operator. The system is highly automated and accurate. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of the present invention.

[0021] Figure 2 This is the front view of the present invention.

[0022] Figure 3 This is a bottom view of the mounting frame, mounting column, and mounting block of the present invention.

[0023] Figure 4 The image shows a top view of a prior art sample dish and standard needle, and the limiting rods one and two of the present invention.

[0024] Figure 5 This is a cross-sectional view of the flat-bottomed container of the present invention.

[0025] Figure 6 This is a cross-sectional view of the sliding sleeve of the present invention.

[0026] Figure 7 This is a schematic diagram of the support plate and limiting block of the present invention.

[0027] Figure 8 This is a cross-sectional view of the mounting column and mounting block of the present invention.

[0028] Figure 9 This is a top view of the rod sleeve, clip, and spring II of the present invention.

[0029] Figure 10 This is a cross-sectional view of the rod sleeve and weights of the present invention.

[0030] Figure 11 For the present invention Figure 8 Enlarged view of point A.

[0031] The reference numerals in the accompanying drawings provided by this invention are as follows: 01-sample dish, 02-standard needle, 1-main control console, 11-flat-bottomed container, 12-guide beam, 13-sliding sleeve, 131-clamping block, 132-spring one, 14-support plate, 141-slot, 15-limiting block, 2-lifting drive assembly, 21-guide post, 22-bearing, 23-lead screw, 24-servo motor, 25-nut, 3-mounting bracket, 4-measuring head assembly, 41-mounting post, 42-mounting block 43-Needle connecting rod, 431-Rod sleeve, 432-Fasting bolt, 433-Weight, 434-Counterweight, 435-T-nut, 44-Clamping sleeve, 441-Button part, 442-Magnetic suction part, 45-Spring two, 46-Electromagnet, 47-Laser rangefinder, 51-Limit rod one, 52-Guide rail, 53-Rack, 54-Limit rod two, 55-Gear, 56-Drive motor, 61-Electric guide rail, 62-Lifting plate, 63-Contact sensor. Detailed Implementation

[0032] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The technical solutions of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. It should be understood that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] A device for measuring the penetration of modified asphalt, such as Figures 1-4As shown, the device includes a main control console 1, a flat-bottomed container 11 mounted on the main control console 1, and a lifting drive assembly 2. The flat-bottomed container 11 contains a support for supporting a sample dish 01. The support raises the lower side of the sample dish 01, which contains asphalt, to a distance of 50mm from the bottom of the flat-bottomed container 11. In practice, this distance can also be greater than 50mm. Furthermore, the lower side of the sample dish 01 on the support is 100mm away from the surface of the constant-temperature water in the flat-bottomed container 11. In practice, this distance can also be greater than 100mm, thus preventing localized overheating or uneven cooling of the sample dish 01. The lifting drive assembly 2 has a lifting component connected to a measuring head assembly 4 located above the flat-bottomed container 11 via a mounting bracket 3. The measuring head assembly 4 is used to mount a standard needle 02 and ensure that the standard needle is properly positioned. The needle 02 measures the penetration of the asphalt in the sample dish 01. The lifting drive assembly 2 drives the mounting frame 3 to move the measuring head assembly 4 and the standard needle 02 mounted on the measuring head assembly 4 downwards until the tip of the standard needle 02 is close to the upper surface of the asphalt in the sample dish 01. Then, under the operation of the measuring head assembly 4, the standard needle 02 is allowed to drop vertically for 5 seconds under a 100-gram load to measure the asphalt penetration. A limiting rod 51 is connected to the lower side of the mounting frame 3, located directly to the right of the standard needle 02 on the measuring head assembly 4. The lower end of the limiting rod 51 extends vertically upwards towards the flat-bottomed container 11. The furthest distance between the center of the standard needle 02 mounted on the measuring head assembly 4 and the lower end of the limiting rod 51 is ≥10mm (e.g., ...). Figure 4 As the mounting frame 3 moves the needle of the standard needle 02 down to near the upper surface of the asphalt inside the sample container 01, the mounting frame 3 also moves the limiting rod 51 down to the inner ring of the sample container 01. At this time, the position of the sample container 01 is adjusted so that the center of the sample container 01 is aligned with the center of the standard needle 02 in the left-right direction and moves to the left along the standard needle 02 until the inner wall of the sample container 01 contacts the outer side of the limiting rod 51. This indicates that the distance between the test point of the standard needle 02 on the asphalt and the edge of the sample container 01 is ≥10mm, thereby avoiding edge effects, ensuring that the test point is close to the center area of ​​the asphalt, and improving measurement accuracy. The lowest point of the limiting rod 51 is higher than the lowest point of the standard needle 02 installed on the measuring head assembly 4, so that even if the mounting frame 3 moves the standard needle... 02 moves down to near the upper surface of the asphalt, and the limiting rod 51 will not interfere with the asphalt in the sample dish 01. During measurement, under the operation of the measuring head assembly 4, the standard needle 02 is dropped vertically for 5 seconds under a 100-gram load. At this time, the limiting rod 51 remains stationary. Two opposing limiting rods 54 slide on the mounting frame 3. The two limiting rods 54 are located on the front and rear sides of the position between the limiting rod 51 and the standard needle 02 on the measuring head assembly 4, respectively. The linear drive group drives the two limiting rods 54 to move towards each other. As the mounting frame 3 moves the tip of the standard needle 02 down to near the upper surface of the asphalt in the sample dish 01, the mounting frame 3 also moves the two limiting rods 54 down to the front and rear outer sides of the sample dish 01 (e.g., ...). Figure 4Then, the position of the sample container 01 is moved and adjusted. When the inner wall of the sample container 01 contacts the outer side of the limiting rod 51, the linear drive group is controlled to drive the two limiting rods 54 to move closer to each other. The front limiting rod 54 will squeeze the sample container 01 forward, and the rear limiting rod 54 will squeeze the sample container 01 backward, thus automatically and accurately centering the sample container 01. This ensures that the distance between the test point of the standard needle 02 on the asphalt and the edge of the sample container 01 is ≥10mm, eliminating the tedious manual calibration steps. Furthermore, the two limiting rods 54 will gradually limit the front-back and left-right positions of the sample container 01 under the squeezing action of the limiting rod 51 on the inner side of the sample container 01, thereby cleverly improving the stability of the asphalt penetration measurement. The linear drive group is set in the safe... On the mounting bracket 3, the lowest point of the second limiting rod 54 is lower than the lowest point of the standard needle 02 installed on the measuring head assembly 4. This allows more of the sample dish 01 to come into contact with the sample dish 01 when it needs to be squeezed after the second limiting rod 54 moves down. In addition, when multiple measurement points need to be measured, the angle of the sample dish 01 can be adjusted by rotating the support of the flat-bottomed container 11. Due to the action of the first limiting rod 51 and the second limiting rod 54, it can still be ensured that the distance between the test point of each standard needle 02 on the asphalt and the edge of the sample dish 01 is ≥10mm. Based on the above limiting, and since the specifications of the sample dishes 01 are mostly the same, it is only necessary to ensure that the angle of adjacent standard needles 02 is close to 120° to further ensure that the distance between each test point is ≥10mm.

[0035] like Figure 2 and Figure 3 As shown, the linear drive assembly includes two left-right opposing guide rails 52 connected to the mounting frame 3. A rack 53 slides on the side of each guide rail 52 that is close to the other. Two limiting rods 54 are connected to the left and right racks 53 respectively. Therefore, the movement of the racks 53 can drive the limiting rods 54 to move. A gear 55 meshes between the two racks 53 on the mounting frame 3. The rotation of the gear 55 causes the two racks 53 to move away from each other, and the two racks 53 cause the two limiting rods 54 to move away from each other to adjust their positions. When the racks 53 reverse, the two racks 53 move closer together and cause the two limiting rods 54 to move closer together to center and compress the sample dish 01. A drive motor 56 is mounted on the mounting frame 3. The output shaft of the drive motor 56 is connected to the gear 55, controlling the drive motor 56 to drive the gear 55 to rotate, thereby automatically driving the two limiting rods 54 to move towards each other.

[0036] like Figure 2As shown, the lifting drive assembly 2 includes a guide post 21 connected to the main control console 1. The guide post 21 is rotatably mounted with a lead screw 23 via two opposing bearings 22. A nut 25 that slides on the guide post 21 is threaded onto the lead screw 23. One side of the nut 25 is connected to a mounting bracket 3. Rotation of the lead screw 23 will drive the nut 25 to lift the mounting bracket 3. A servo motor 24 is mounted on the guide post 21. The output shaft of the servo motor 24 is connected to the lead screw 23, and the servo motor 24 drives the lead screw 23 to rotate.

[0037] like Figures 5-7 As shown, the support includes two front-to-back guide beams 12 connected to the inner wall of the flat-bottomed container 11. The extension directions of the two guide beams 12 are parallel to the line connecting the standard needle 02 and the limiting rod 51 on the measuring head assembly 4. A sliding sleeve 13 slides between the sides of the two guide beams 12 that are close to each other. A support plate 14 for supporting the sample dish 01 rotates on the sliding sleeve 13. The center of the support plate 14 coincides with the infinite extension line between the standard needle 02 and the limiting rod 51 on the measuring head assembly 4, so that the sliding sleeve 13 drives the sample dish 01 to move left and right through the support plate 14. In this way, when adjusting the position of the sample dish 01, the front and rear limiting effect of the guide beams 12 and the center positioning effect of the support plate 14 ensure that the center of the sample dish 01 is aligned with the center of the standard needle 02 in the left and right direction. And when the sample dish 01 moves to the left and contacts the outside of the limiting rod 51, the measuring point of the standard needle 02 on the asphalt inside the sample dish 01 can also be measured. The system automatically aligns with the line connecting the edge of the sample dish 01 to its center, ensuring that the distance between the test point of the standard needle 02 on the asphalt and the edge of the sample dish 01 is ≥10mm. This method eliminates the need for manual manipulation of the sample dish 01's position. Furthermore, rotating the support plate 14 allows the sample dish 01 to rotate and adjust its angle. This ensures that the distance between the test point of the standard needle 02 on the asphalt and the edge of the sample dish 01 is ≥10mm, while also facilitating multiple penetration measurements. The center of the support plate 14 is recessed to form a support groove for placing the sample dish 01. The support groove has multiple through holes for the flow of constant temperature water. Three limiting blocks 15 are connected to the support groove of the support plate 14 to limit the position of the sample dish 01. The sample dish 01, filled with asphalt, is placed in the support groove of the support plate 14, and the three limiting blocks 15 limit the position of the sample dish 01.

[0038] like Figure 6 and Figure 7As shown, the support also includes three circumferentially spaced and evenly arranged locking blocks 131 embedded and slidably mounted on the sliding sleeve 13. A spring 132 located inside the sliding sleeve 13 connects the locking blocks 131 to the sliding block 13. The spring 132 is used to reset the sliding locking blocks 131. The support plate 14 has three circumferentially spaced and evenly arranged slots 141, which correspond one-to-one with the three locking blocks 131. Thus, when using three standard needles 02 to sequentially measure the penetration depth on the asphalt in the same sample dish 01, after each standard needle 02 is used, the support plate 14 is directly rotated. The slot 141 of the support plate 14 will squeeze the block 131 into the sliding sleeve 13 and retract it. When the support plate 14 rotates 120°, the squeezed block 131 will pop out under the action of the spring 132 and lock into another slot 141, thereby achieving an automatic positioning effect. This ensures that the angle interval between the three standard needles 02 is 120°, thus avoiding the mutual interference between different test points due to the close distance between them. This ensures that each measurement value is independent and accurate, and is easy to operate. It eliminates the tedious step of manually rotating and adjusting the sample dish 01, avoids the inaccuracy caused by visual observation, and does not require the use of external measuring tools.

[0039] like Figure 2 , Figure 3 , Figure 8 and Figure 9As shown, the measuring head assembly 4 includes a mounting post 41 connected to the mounting frame 3. A mounting block 42 is connected to the lower part of the mounting post 41. A needle connecting rod 43 for mounting a standard needle 02 slides on the mounting block 42. The needle connecting rod 43 is adapted to move vertically downwards along the mounting block 42 under the action of gravity, causing the standard needle 02 to fall vertically under a load of 100 grams to insert into the asphalt in the sample dish 01. A sleeve 44 slides on the mounting block 42 surrounding the needle connecting rod 43. One side of the sleeve 44 protrudes to a distance of 2 / 3 of the needle connecting rod 43. 1. External contact fit: The left and right sides of the clip 44 are the button part 441 and the magnetic part 442, respectively. A second spring 45 is connected between the clip 44 and the mounting block 42 and surrounds the magnetic part 442. The second spring 45 is used to reset the clip 44 after sliding. An electromagnet 46 suitable for magnetic engagement with the magnetic part 442 is installed on the mounting post 41. Initially, the bulge on the clip 44 presses the needle connecting rod 43 against the mounting block 42 under the action of the second spring 45. The standard needle 02 needs to be dropped vertically for 5 seconds to measure the needle penetration. During measurement, the electromagnet 46 magnetically attracts the magnetic suction part 442, which in turn moves the clamp 44 to the right, releasing the needle connecting rod 43. The standard needle 02 then falls vertically. After 5 seconds, the electromagnet 46 is de-energized, and the clamp 44, under the action of the second spring 45, moves to the left to clamp the needle connecting rod 43 again. This completes the operation of the standard needle 02 falling vertically for 5 seconds to measure the penetration depth. At this time, it is necessary to calculate the depth of the standard needle 02 vertically inserted into the asphalt sample. A laser rangefinder 47 is installed on the upper left side of the mounting column 41. The optical rangefinder 47 can measure the distance the mounting post 41 moves downward within 5 seconds to determine the depth of the standard needle 02 vertically inserted into the asphalt sample. If it is necessary to move the needle connecting rod 43 upward to reset, press the button part 441 to move the clamp 44 to the right to release the needle connecting rod 43, and then move the needle connecting rod 43 upward to reset until the weight 433 touches the lower side of the mounting block 42 and can no longer move upward. Then release the pressing part, and the clamp 44 will reset and clamp the needle connecting rod 43 under the action of the second spring 45, thereby completing the reset of the needle connecting rod 43.

[0040] like Figure 10As shown, the needle connecting rod 43 includes a rod sleeve 431 that slides on the mounting block 42. The lower end of the rod sleeve 431 has a socket suitable for inserting a standard needle 02. A fastening bolt 432 is threaded onto the socket of the rod sleeve 431. Tightening the fastening bolt 432 fixes the standard needle 02 to the socket of the rod sleeve 431, and loosening the fastening bolt 432 releases the standard needle 02. The lower part of the rod sleeve 431 has a partial protrusion, which supports a weight 433 surrounding the rod sleeve 431. The weight 433 is used to increase the weight. The upper part of the sleeve 431 has a receiving cavity, and a counterweight 434 is placed in the receiving cavity of the sleeve 431. The upper end of the sleeve 431 is threaded with a T-nut 435 for blocking the upper receiving cavity of the sleeve 431. The 100-gram load during asphalt penetration measurement consists of the weight of the standard needle 02, the sleeve 431, the fastening bolt 432, the weight 433, the counterweight 434, and the T-nut 435. The weight of the needle connecting rod 43 is adjusted by the replaceable weight 433 and the counterweight 434 to ensure that the asphalt penetration measurement operation is carried out normally.

[0041] like Figure 8 and Figure 11 As shown, it also includes an electric guide rail 61 installed inside the mounting column 41. A lifting plate 62, which slides through the mounting column 41, is connected to the slider of the electric guide rail 61. The lifting plate 62 is located below the T-nut 435. A contact sensor 63 is embedded on the upper side of the lifting plate 62. The contact sensor 63 is electrically connected to the controller in the main control console 1. The electromagnet 46 is also electrically connected to the controller in the main control console 1. Initially, the contact sensor 63 is pressed by the T-nut 435, the electromagnet 46 is in the closed state, and the clamp 44 clamps the needle connecting rod 43. If it is necessary for the needle connecting rod 43 to move down along the mounting block 42 for 5 seconds and drive the standard needle 02 to insert into the asphalt, the electric guide rail 61 is first controlled to drive the lifting plate 62 to quickly move the contact sensor 63 away from the T-nut 435. The lifting plate 62 will move down to the threshold, and then the contact sensor... The device 63 controls the electromagnet 46 to be energized for 5 seconds via the controller in the main console 1 to complete the insertion of the standard needle 02. When the standard needle 02 is removed from the needle connecting rod 43, and the needle connecting rod 43 needs to be moved upward to reset, the electric guide rail 61 drives the lifting plate 62 to move the contact sensor 63 upward. When the contact sensor 63 moves upward to contact the T-nut 435 again, the electromagnet 46 is energized again for 5 seconds, and the clamp 44 releases the needle connecting rod 43. At this time, the upward-moving lifting plate 62 can drive the needle connecting rod 43 to move upward to reset via the T-nut 435. During the upward and reset process of the needle connecting rod 43, there is no need to manually press the button part 441 or manually support the needle connecting rod 43 to move upward. This avoids the impact on the standard needle 02 on the asphalt caused by the manual accidentally moving the needle connecting rod 43 downward a small distance when contacting it. The device is highly automated and accurate, and easy to operate.

[0042] A method of using the above-mentioned device for measuring the penetration of modified asphalt includes:

[0043] S1) Install the standard needle 02 onto the measuring head assembly 4, and place the sample dish 01 containing asphalt on the support inside the flat-bottomed container 11;

[0044] S2) Control the lifting drive group 2 to drive the measuring head assembly 4 to move down and drive the standard needle 02 to move down to the upper surface of the asphalt in the sample container 01, while the limiting rod 51 moves down to the inner ring of the sample container 01.

[0045] S3) Adjust the position of the sample container 01 so that the inner wall of the sample container 01 contacts the outer side of the limiting rod 51, and use the limiting rod 51 to make the distance between the test point of the standard needle 02 on the asphalt and the edge of the sample container 01 ≥ 10mm.

[0046] S4) The two limiting rods 54 approach each other to center and straighten the sample container 01, and use the cooperation of the limiting rods 51 to limit the front-back and left-right positions of the sample container 01.

[0047] S5) The standard needle 02 is dropped vertically for 5 seconds under a load of 100 grams by the operation of the measuring head assembly 4 to measure the penetration of asphalt.

[0048] S6) After the measurement is completed, release the standard needle 02 from the measuring head assembly 4, and control the lifting drive group 2 to drive the measuring head assembly 4 to move up and reset.

[0049] Obviously, the embodiments described above are only some embodiments of the present invention, and not all embodiments. They only express the preferred implementation of the present invention and are described in a relatively specific and detailed manner, but should not be construed as limiting the scope of the present invention.

[0050] It should be noted that, for those skilled in the art, various modifications, additions or subtractions, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, 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.

Claims

1. A device for measuring the penetration of modified asphalt, comprising a main control console (1), a flat-bottomed container (11) disposed on the main control console (1), and a lifting drive assembly (2), wherein the flat-bottomed container (11) is provided with a support for supporting a sample dish (01); the lifting component of the lifting drive assembly (2) is provided with a measuring head assembly (4) located above the flat-bottomed container (11) via a mounting frame (3), the measuring head assembly (4) being used to mount a standard needle (02); characterized in that, It also includes: a limiting rod 1 (51) connected to the lower side of the mounting frame (3), the farthest distance between the center of the standard needle (02) installed on the measuring head assembly (4) and the lower end of the limiting rod 1 (51) is ≥10mm, the lowest point of the limiting rod 1 (51) is higher than the standard needle (02) installed on the measuring head assembly (4), and two opposing limiting rods 2 (54) sliding on the mounting frame (3). The two limiting rods 2 (54) are respectively located on both sides of the position between the limiting rod 1 (51) and the standard needle (02) on the measuring head assembly (4). The two limiting rods 2 (54) are driven to move towards each other by a linear drive group. The linear drive group is provided on the mounting frame (3), and the lowest point of the limiting rod 2 (54) is lower than the standard needle (02) installed on the measuring head assembly (4). The support includes a guide beam (12) connected to the inner wall of the flat-bottomed container (11). The extension direction of the guide beam (12) is parallel to the line connecting the standard needle (02) on the measuring head assembly (4) to the limiting rod (51). A sliding sleeve (13) slides on one side of the guide beam (12). A support plate (14) for supporting the sample dish (01) is rotatably mounted on the sliding sleeve (13). The center of the support plate (14) coincides with the infinite extension line between the standard needle (02) on the measuring head assembly (4) and the limiting rod (51). The middle part of the support plate (14) is recessed downward to form a support groove for placing the sample dish (01). Multiple through holes are opened on the support groove. Three limiting blocks (15) suitable for limiting the sample dish (01) are connected to the support groove of the support plate (14). The support also includes three circumferentially spaced and evenly arranged locking blocks (131) that are slidably disposed on the sliding sleeve (13). A spring (132) is connected between the locking blocks (131) and the sliding sleeve (13). The support plate (14) has three circumferentially spaced and evenly arranged locking grooves (141), and the three locking grooves (141) are matched one-to-one with the three locking blocks (131). The measuring head assembly (4) includes a mounting post (41) connected to the mounting bracket (3), a mounting block (42) connected to the lower part of the mounting post (41), a needle connecting rod (43) for mounting a standard needle (02) sliding on the mounting block (42), a sleeve (44) sliding around the needle connecting rod (43) on the mounting block (42), one side of the sleeve (44) protruding to contact and cooperate with the needle connecting rod (43), a button part (441) and a magnetic suction part (442) on both sides of the sleeve (44), a spring (45) connecting the sleeve (44) and the mounting block (42), an electromagnet (46) suitable for magnetic cooperation with the magnetic suction part (442) mounted on the mounting post (41), and a laser rangefinder (47) mounted on the upper part of the mounting post (41). The needle connecting rod (43) includes a sleeve (431) that slides on the mounting block (42). The lower end of the sleeve (431) has a socket suitable for inserting a standard needle (02). A fastening bolt (432) is threaded onto the socket of the sleeve (431). The lower part of the sleeve (431) has a partial protrusion. A weight (433) is supported around the protrusion of the sleeve (431). The weight (433) is used to increase the weight. The upper part of the sleeve (431) has a receiving cavity. A counterweight (434) is placed in the receiving cavity of the sleeve (431). A T-shaped nut (435) for blocking the upper receiving cavity of the sleeve (431) is threaded onto the upper end of the sleeve (431). It also includes an electric guide rail (61) installed on the mounting column (41), a lifting plate (62) connected to the slider of the electric guide rail (61), the lifting plate (62) being located below the T-nut (435), a contact sensor (63) being installed on the lifting plate (62), the contact sensor (63) being electrically connected to the controller in the host console (1), and the electromagnet (46) being electrically connected to the controller in the host console (1).

2. The device for measuring the penetration of modified asphalt according to claim 1, characterized in that, The linear drive assembly includes two opposing guide rails (52) connected to the mounting bracket (3). A rack (53) slides on one side of the guide rail (52). Two limiting rods (54) are respectively connected to the two racks (53). A gear (55) meshes between the two racks (53) and rotates on the mounting bracket (3). A drive motor (56) is mounted on the mounting bracket (3). The output shaft of the drive motor (56) is connected to the gear (55).

3. The measuring device for the penetration of modified asphalt according to claim 1, characterized in that, The lifting drive assembly (2) includes a guide post (21) connected to the host console (1). The guide post (21) is rotatably provided with a lead screw (23) via a bearing (22). A nut (25) that slides on the guide post (21) is threaded onto the lead screw (23). One side of the nut (25) is connected to the mounting bracket (3). A servo motor (24) is mounted on the guide post (21).

4. A method of using the measuring device for the penetration of modified asphalt according to claim 1, characterized in that, Including: S1) Install the standard needle (02) onto the measuring head assembly (4), and place the sample dish (01) filled with asphalt on the support inside the flat-bottomed container (11); S2) Control the lifting drive group (2) to drive the measuring head assembly (4) to move down and drive the standard needle (02) to move down to the upper surface of the asphalt in the sample dish (01), while the limiting rod (51) moves down to the inner ring of the sample dish (01); S3) Adjust the position of the sample container (01) so that the inner wall of the sample container (01) contacts the outer side of the limiting rod (51) and use the limiting rod (51) to make the distance between the test point of the standard needle (02) on the asphalt and the edge of the sample container (01) ≥10mm. S4) The two limiting rods (54) move closer to each other to center and straighten the sample dish (01), and use the cooperation of the limiting rod (51) to limit the front-back position and left-right position of the sample dish (01); S5) The standard needle (02) is dropped vertically for 5 seconds under a load of 100 grams by the operation of the measuring head assembly (4) to measure the penetration of asphalt. S6) After the measurement is completed, the measuring head assembly (4) is released from the standard needle (02), and the lifting drive group (2) is controlled to drive the measuring head assembly (4) to move up and reset.

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