A Marshall automatic compactor for testing the stability of asphalt mixture

Abstract

The invention discloses a Marshall automatic compactor for detecting the stability of asphalt mixture, relates to the field of asphalt mixture stability detection, and solves the problem that the existing Marshall automatic compactor has a single function and is not convenient and efficient when used. The invention comprises a base, a flipping mechanism, an oil spraying mechanism, a feeding mechanism and a discharging mechanism. The base is fixedly connected with a body, a compacting hammer and a test mold cylinder are arranged in the body, the flipping mechanism comprises a device box, a rotating cylinder is rotatably connected in the device box, the oil spraying mechanism comprises an oil storage tank and a spray head, a through hole connected to a storage tank is opened on the side of the rotating cylinder, the Marshall automatic compactor for detecting the stability of asphalt mixture weighs a set amount of mixture through the feeding mechanism and injects it into the test mold cylinder, the flipping mechanism flips the rotating cylinder 180 degrees, and the oil spraying mechanism drives the spray head to spray oil on the inner wall of the upper test mold cylinder when the through hole faces downward, and the discharging mechanism performs automatic discharging and collection.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt mixture stability detection, in particular to a Marshall automatic compactor for asphalt mixture stability detection. Background Art

[0002] The Marshall compactor is a special instrument for sample molding in the Marshall stability test of asphalt mixture. Its structure and performance fully meet the requirements of highway test regulations. The instrument has the characteristics of small size, easy operation, reliable operation, automatic technology, automatic compaction, automatic shutdown, and can be suspended during operation. When in use, it is necessary to brush oil on the inner wall of the test mold tube, and then put a set amount of asphalt mixture (about 1200g) into the test mold tube. After compacting the set number of times through the compactor, turn the test mold tube 180° and perform the same number of compaction operations, then demould the compacted asphalt from the test mold tube, measure the asphalt height to complete the test.

[0003] The existing Marshall automatic compactor for asphalt mixture stability testing only has the function of compaction when in use. The oiling, demoulding and flipping of the test mold cylinder all require workers to operate separately, which is inefficient and cumbersome, greatly reducing the operating difficulty and work efficiency of workers. To this end, we propose a Marshall automatic compactor for asphalt mixture stability testing. Summary of the invention

[0004] The object of the present invention is to provide a Marshall automatic compactor for asphalt mixture stability testing that is convenient for improving testing efficiency and convenience, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a Marshall automatic compactor for asphalt mixture stability detection, comprising a base, a flipping mechanism, an oil injection mechanism, a feeding mechanism and a discharging mechanism, the base is fixedly connected to a body, a compacting hammer and a test mold cylinder are arranged in the body, the flipping mechanism comprises a device box fixedly mounted on the body, a rotating cylinder is rotatably connected in the device box, a storage groove is provided on the rotating cylinder which is slidably connected to the outer wall of the test mold cylinder in a horizontal direction, a flipping member for flipping the rotating cylinder 180° is arranged in the base, the oil injection mechanism comprises an oil storage tank fixedly mounted on the base, and a A spray head, a through hole connected to the storage groove is provided on the side of the rotating cylinder, and an oil spray member is provided in the oil storage tank for driving the spray head to spray oil on the inner wall of the upper test mold cylinder when the through hole is facing downward. The feeding mechanism includes a weighing pan installed on the top of the device box, and an inlet connected to the through hole is provided on the upper side of the device box. The feeding mechanism is used to weigh the required amount of asphalt mixture through the weighing pan, and add the mixture into the test mold cylinder when the through hole is rotated to be connected to the bottom end of the inlet. The discharging mechanism is installed on the base, and is used to collect the compacted mixture, so as to improve the detection efficiency and convenience.

[0006] Preferably, the flipping mechanism also includes an electric telescopic rod fixedly mounted on the machine body, the output end of the electric telescopic rod is rotatably connected to the middle part of the side surface of the trial mold cylinder, and the bottom surface of the trial mold cylinder is slidably connected to the top surface of the base in a horizontal direction, so as to drive the trial mold cylinder to move its position.

[0007] Preferably, the flipping member includes a gear plate fixedly mounted on the rotating cylinder, a driving motor is fixedly connected to the base, an output end of the driving motor is coaxially fixedly connected to a first gear meshing with the gear plate, a limiting member for limiting the rotation angle of the rotating cylinder is provided on the base, and a force storage member for storing force when the driving motor drives the rotating cylinder to rotate, and automatically drives the rotating cylinder to rotate in the opposite direction when the trial mold cylinder is inserted into the storage slot next time, so as to facilitate the flipping of the trial mold cylinder.

[0008] Preferably, the limiting member includes a fixing tube fixedly mounted on the base, a fixing ring fixedly connected to the side of the fixing tube, a fixing block coaxially fixedly connected to the gear plate, an outer wall of the fixing block slidably connected to a sliding plate in a horizontal direction, an arc groove is provided on the fixing ring, and a limiting block slidably connected to the outer wall of the sliding plate is fixedly connected to the arc groove, so as to facilitate limiting the rotation angle of the rotating cylinder.

[0009] Preferably, the force storage member includes a rotating disk rotatably connected to the base, the rotating disk is fixedly connected to a first spring fixedly connected to the sliding disk, the rotating disk is coaxially fixedly connected to a sliding rod, the outer wall of the sliding rod is slidably connected to a sleeve tube in a horizontal direction, the sleeve tube passes through the gear disk and the fixed block, and is slidably connected to the gear disk and the fixed block in a horizontal direction, the inner wall of the fixed tube is fixedly connected to a clockwork spring fixedly connected to the outer wall of the fixed block, the sliding disk is provided with a control member for limiting the position with the fixed ring, so as to store force when the driving motor drives the rotating cylinder to rotate, and automatically drives the rotating cylinder to rotate in the opposite direction when the trial mold cylinder is inserted into the storage slot next time.

[0010] Preferably, the control member includes a beveled tooth block slidably connected to the inner wall of the limit block, a second spring fixedly connected to the limit block is fixedly connected to one side of the beveled tooth block, a plurality of groups of beveled tooth grooves that can be engaged with the beveled tooth block are provided in the arc groove, a limit groove slidably connected to the beveled tooth block in a horizontal direction is provided on the base, and a releasing member for releasing the limit of the beveled tooth block and the beveled tooth groove when the sleeve tube slides is provided on the sliding disk, thereby facilitating the limiting of the sliding disk and the fixed ring.

[0011] Preferably, the releasing member includes a sliding frame fixedly mounted on the sliding disk, a snap-in block being slidably connected inside the sliding frame, a snap-in groove being plugged into the snap-in block being provided on the sleeve tube, the tip of the snap-in block being a cone, the cross-section of the snap-in groove being an inverted triangle, one end of the snap-in block being fixedly connected to a third spring fixedly connected to the sliding frame, and a fourth spring fixedly connected to one end of the sliding rod being fixedly connected inside the sleeve tube, so as to facilitate releasing the limiting of the bevel tooth block and the bevel tooth groove when the sleeve tube slides.

[0012] Preferably, the oil spray component includes a collecting bucket fixedly mounted on the base, the top of the collecting bucket is connected to the through hole, the bottom of the collecting bucket is connected to the oil storage tank, a delivery pump is fixedly connected to the oil storage tank, the input end of the delivery pump is connected to the oil storage tank, and the output end of the delivery pump is connected to the nozzle, so as to facilitate oil spray lubrication of the inner wall of the trial mold cylinder.

[0013] Preferably, the discharging mechanism includes a discharging platform installed on the base, a discharging trough is provided on the base, the discharging platform is slidably connected to the inner wall of the discharging trough in a horizontal direction, a collecting platform is fixedly connected to the discharging platform, and a buffer pad is adhesively connected to the top of the collecting platform to facilitate automatic discharging and collection.

[0014] Preferably, the feeding mechanism further comprises a stirring rod mounted on the device box to facilitate the feeding operation.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The Marshall automatic compactor for asphalt mixture stability detection provided by the present invention solves the problems that the existing Marshall automatic compactor has a single function, is not convenient and efficient to use, and is difficult to realize functions such as automatic oiling, flipping, and auxiliary demoulding. The asphalt mixture is poured onto the scale to weigh the required amount of the mixture, the electric telescopic rod is started to push the test mold cylinder into the storage tank, and the delivery pump is triggered to run, so that the lubricating oil in the oil storage tank is sprayed upward to the inner wall of the test mold cylinder through the nozzle, and the excess oil will flow into the collection bucket for recovery. After the oil spraying is completed, the drive motor is started to drive the rotating cylinder and the test mold cylinder to rotate 180° together, and the limit block rotates from the lower side of the arc groove to the upper side for limiting, and then the drive motor is stopped. At this time, the through hole is connected with the feed port, and the material can be fed. The electric telescopic rod is retracted, so that the test mold cylinder moves to the bottom of the compacting hammer, and the body can be started to drive the compacting hammer to reciprocate and rise and fall. After hammering the mixture a set number of times, the hammering is stopped, and the electric telescopic rod is started again to push the test mold cylinder into the storage tank, and the flipping operation can be performed.

[0017] 2. The present invention provides a Marshall automatic compactor for asphalt mixture stability detection. When the side of the test mold cylinder enters the storage tank for the first time (at this time, it is in the oil injection feeding stage), the side of the test mold cylinder pushes the sleeve tube to slide, and drives the clamping block to move synchronously through the clamping groove. The clamping block slides into the limit groove. At this time, the clockwork spring cannot drive the fixed block to make the rotating cylinder rotate. As the sleeve tube continues to push, the clamping block will slide out of the clamping groove, the first spring pushes the sliding disk to reset, and the limit block slides into the arc groove again. As the driving motor drives the rotating cylinder to rotate, the bevel gear block It slides in the beveled tooth groove until it is plugged into the uppermost beveled tooth groove to complete the limit. During this process, the clockwork spring continuously accumulates force and is compressed. When the trial mold cylinder enters the storage groove for the second time (it is in the flipping stage at this time), the sleeve tube is pushed again. Under the rebound action of the clockwork spring, the fixed block and the rotating cylinder can be driven to rotate until the beveled tooth block rotates to the lower side and engages with the limit groove, and the rotating cylinder no longer rotates. At this time, the trial mold cylinder just rotates 180° to complete the flipping, so that the driving motor does not need to be started again during the flipping process, which avoids the frequent starting of the driving motor, which increases energy consumption and reduces the service life.

[0018] 3. The present invention provides a Marshall automatic compactor for testing the stability of asphalt mixtures. After the compaction is completed, the discharge table is pulled out so that the collecting table is directly below the test mold cylinder. The single-point driven compacting hammer is hammered once again to push the mixture in the test mold cylinder downward and drop it onto the top of the buffer pad. The discharge table is pushed to reset, and the mixture is taken out to perform the measurement operation to complete the test. This reciprocating process can be used to perform the next asphalt mixture stability test. At the same time, since the asphalt mixture will be in the lower area of ​​the test mold cylinder during the compaction process, the mixture will rotate after being turned over. To the upper side, the flipped through hole is connected to the nozzle position at the bottom again, so the delivery pump can be started again to spray oil, ensuring that the inner wall of the lower side test mold cylinder of the mixture is smoother after the flip, so that when it is hammered again, the mixture can quickly slide to the bottom and collide with the top of the discharge platform, preventing the mixture from needing multiple hammering to slide to the bottom due to the large side friction, reducing the test error. The device is more comprehensive in function and more convenient and efficient in operation, which greatly reduces the difficulty of operation for workers and also improves the efficiency and accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the side structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the fuel injection mechanism of the present invention;

[0023] Figure 5 for Figure 4 A magnified image of area A;

[0024] Figure 6 It is a schematic diagram of the structure of the flipping mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the feeding mechanism of the present invention;

[0026] Figure 8 for Figure 7 Enlarged view of area B;

[0027] Fig. 9 This is a schematic diagram of the control structure of the present invention;

[0028] Fig.10 It is a cross-sectional view of the turnover mechanism structure of the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of the release member of the present invention;

[0030] Fig.12 It is a schematic diagram of the structure of the discharging mechanism of the present invention.

[0031] In the figure: 1-base; 2-machine body; 3-hammer; 4-test mold cylinder; 5-turning mechanism; 6-device box; 7-rotating cylinder; 8-storage tank; 9-turning member; 10-oil spraying mechanism; 11-oil storage tank; 12-spray head; 13-through hole; 14-oil spraying member; 15-feeding mechanism; 16-weighing pan; 17-feeding port; 18-discharging mechanism; 19-electric telescopic rod; 20-gear plate; 21-driving motor; 22-first gear; 23-limiting member; 24-force storage member; 25-fixing tube; 26-fixing ring; 27-fixing block; 28-sliding plate; 29-arc groove; 30-limiting block; 31-rotating plate; 32-first spring; 33-sliding rod; 34-sleeve tube; 35-spring spring; 36-control member; 37-oblique tooth block; 38-second spring; 39-oblique tooth groove; 40-limiting groove; 41-releasing member; 42-sliding frame; 43-clamping block; 44-clamping groove; 45-third spring; 46-fourth spring; 47-collecting bucket; 48-delivery pump; 49-discharging platform; 50-discharging trough; 51-collecting platform; 52-buffer pad; 53-stirring rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 12The present invention provides a technical solution: a Marshall automatic compactor for asphalt mixture stability detection, comprising a base 1, a flipping mechanism 5, an oil injection mechanism 10, a feeding mechanism 15 and a discharging mechanism 18, the base 1 is fixedly connected to a body 2, the body 2 is provided with a compacting hammer 3 and a test mold cylinder 4, the flipping mechanism 5 comprises a device box 6 fixedly mounted on the body 2, a rotating cylinder 7 is rotatably connected in the device box 6, a storage groove 8 is provided on the rotating cylinder 7 and is slidably connected to the outer wall of the test mold cylinder 4 in the horizontal direction, a flipping member 9 for flipping the rotating cylinder 7 by 180° is provided in the base 1, the oil injection mechanism 10 comprises an oil storage tank 11 fixedly mounted on the base 1, a nozzle 12 is provided in the oil storage tank 11, the rotating cylinder A through hole 13 connected to the storage groove 8 is provided on the side of 7, and an oil spraying member 14 is provided in the oil storage tank 11 for driving the nozzle 12 to spray oil on the inner wall of the upper test mold tube 4 when the through hole 13 is facing downward. The feeding mechanism 15 includes a weighing pan 16 installed on the top of the device box 6, and a feeding port 17 connected to the through hole 13 is provided on the upper side of the device box 6. The feeding mechanism 15 is used to weigh the required amount of asphalt mixture through the weighing pan 16, and add the mixture into the test mold tube 4 when the through hole 13 is rotated to be connected to the bottom end of the feeding port 17. The discharging mechanism 18 is installed on the base 1, and is used to collect the compacted mixture. The feeding mechanism 15 also includes a stirring rod 53 installed on the device box 6.

[0034] The flipping mechanism 5 also includes an electric telescopic rod 19 fixedly mounted on the machine body 2, the output end of the electric telescopic rod 19 is rotatably connected to the middle part of the side of the trial mold cylinder 4, the bottom surface of the trial mold cylinder 4 is slidably connected to the top surface of the base 1 along the horizontal direction, and the discharging mechanism 18 includes a discharging platform 49 installed on the base 1, a discharging trough 50 is provided on the base 1, the discharging platform 49 is slidably connected to the inner wall of the discharging trough 50 along the horizontal direction, a collecting platform 51 is fixedly connected to the discharging platform 49, and a buffer pad 52 is adhesively connected to the top of the collecting platform 51.

[0035] The flip member 9 includes a gear plate 20 fixedly mounted on the rotating cylinder 7, a driving motor 21 fixedly connected to the base 1, the driving motor 21 model is preferably YYHS-40, the output end of the driving motor 21 is coaxially fixedly connected to a first gear 22 meshing with the gear plate 20, a limiting member 23 for limiting the rotation angle of the rotating cylinder 7 is provided on the base 1, and a force storage member 24 for automatically driving the rotating cylinder 7 to rotate in the opposite direction when the driving motor 21 drives the rotating cylinder 7 to rotate is provided on the base 1, and the limiting member 23 includes a fixed tube 25 fixedly mounted on the base 1, a fixed ring 26 is fixedly connected to the side of the fixed tube 25, a fixed block 27 is coaxially fixedly connected to the gear plate 20, and a sliding plate 28 is slidably connected to the outer wall of the fixed block 27 in a horizontal direction, an arc groove 29 is provided on the fixed ring 26, and a limiting block 30 slidably connected to the arc groove 29 is fixedly connected to the outer wall of the sliding plate 28.

[0036] The force storage member 24 includes a rotating disk 31 rotatably connected to the base 1, a first spring 32 fixedly connected to the sliding disk 28 is fixedly connected to the rotating disk 31, a sliding rod 33 is coaxially fixedly connected to the rotating disk 31, a sleeve tube 34 is slidably connected to the outer wall of the sliding rod 33 in a horizontal direction, the sleeve tube 34 passes through the gear disk 20 and the fixed block 27, and is slidably connected to the gear disk 20 and the fixed block 27 in a horizontal direction, a clockwork spring 35 fixedly connected to the outer wall of the fixed block 27 is fixedly connected to the inner wall of the fixed tube 25, and a control member 36 for limiting the position with the fixed ring 26 is provided on the sliding disk 28.

[0037] The control member 36 includes a beveled tooth block 37 slidably connected to the inner wall of the limit block 30, a second spring 38 fixedly connected to the limit block 30 is fixedly connected to one side of the beveled tooth block 37, a plurality of groups of beveled tooth grooves 39 capable of engaging with the beveled tooth block 37 are provided in the arc groove 29, a limit groove 40 slidably connected to the beveled tooth block 37 in a horizontal direction is provided on the base 1, and a release member 41 for releasing the limit of the beveled tooth block 37 and the beveled tooth groove 39 when the sleeve tube 34 slides is provided on the sliding plate 28.

[0038] The release member 41 includes a sliding frame 42 fixedly mounted on the sliding disk 28, a snap-in block 43 is slidably connected inside the sliding frame 42, a snap-in groove 44 is provided on the sleeve 34 and is plugged into the snap-in block 43, the tip of the snap-in block 43 is a conical surface, the cross-section of the snap-in groove 44 is an inverted triangle, one end of the snap-in block 43 is fixedly connected to a third spring 45 fixedly connected to the sliding frame 42, and a fourth spring 46 fixedly connected to one end of the sliding rod 33 is fixedly connected inside the sleeve 34.

[0039] The oil spraying member 14 includes a collecting hopper 47 fixedly mounted on the base 1, the top end of the collecting hopper 47 is connected to the through hole 13, the bottom end of the collecting hopper 47 is connected to the oil storage tank 11, a delivery pump 48 is fixedly connected to the oil storage tank 11, the input end of the delivery pump 48 is connected to the oil storage tank 11, and the output end of the delivery pump 48 is connected to the nozzle 12.

[0040] Pour the asphalt mixture onto the weighing pan 16, weigh out the required amount of the mixture through the weighing assembly at the bottom, start the electric telescopic rod 19 to push the test mold cylinder 4 into the storage tank 8, and the through hole 13 is now facing downward. After the bottom of the test mold cylinder 4 completely blocks the light in the through hole 13, the delivery pump 48 can be triggered by the light sensor to run, so that the lubricating oil in the oil storage tank 11 is sprayed upward to the inner wall of the test mold cylinder 4 through the nozzle 12, and the excess oil will flow into the collection bucket 47 and output to the oil storage tank 11 for storage. After the oil spraying is completed, start the drive motor 21 to drive the first gear 22 to rotate, and the first gear 22 drives the gear plate 20 to rotate, so that the rotating cylinder 7 drives the test mold cylinder 4 to rotate together After the mixing bowl 13 is rotated 180°, the limit block 30 rotates from the lower side of the arc groove 29 to the upper side for limiting, and then the driving motor 21 is stopped. At this time, the through hole 13 rotates upward and is connected with the feeding port 17. The weighing pan 16 can be removed to push the mixture into the test mold tube 4 through the stirring rod 53. The mixture is inserted into the test mold tube 4 multiple times through the stirring rod 53 to make it evenly distributed. After the feeding is completed, the electric telescopic rod 19 is retracted to make the bottom end of the test mold tube 4 slide on the base 1. The test mold tube 4 moves to the bottom of the compacting hammer 3 and the machine body 2 is started to drive the compacting hammer 3 to reciprocate and rise and fall. After hammering the mixture for a set number of times, the hammering is stopped. The electric telescopic rod 19 is started again to push the test mold tube 4 into the storage slot 8, and the flipping operation can be performed.

[0041] When the side of the trial mold cylinder 4 enters the storage groove 8 for the first time (at this time it is in the oil injection feeding stage), the limit block 30 is in the lower end position of the arc groove 29. At this time, the side of the trial mold cylinder 4 pushes the sleeve tube 34 to slide, and drives the clamping block 43 to move synchronously through the clamping groove 44, and the sliding plate 28 slides therewith, and the clamping block 43 slides into the limit groove 40. At this time, the spring spring 35 cannot drive the fixed block 27 to make the rotating cylinder 7 rotate. As the sleeve tube 34 continues to push, the thrust of the clamping groove 44 on the clamping block 43 is less than the elastic force of the first spring 32, and the clamping block 43 will slide out of the clamping groove 44, and the first spring 32 pushes the sliding plate 28 to reset, and the limit block 30 slides into the arc groove 29 again. As the driving motor 21 drives the rotating cylinder 7 to rotate, the bevel tooth block 37 slides in the bevel tooth groove 39 until it is plugged into the uppermost bevel tooth groove 39 to complete the limit. In this process, the spring spring 35 is continuously charged The second spring 38 pushes the sleeve 34 to reset, and the engaging groove 44 slides to the position engaged with the engaging block 43 again. When the test mold cylinder 4 enters the storage groove 8 for the second time (at this time it is in the flipping stage), the sleeve 34 is pushed again, driving the sliding plate 28 to slide so that the bevel gear block 37 pushes the bevel gear groove 39. At this time, under the rebound action of the clockwork spring 35, the fixed block 27 and the rotating cylinder 7 can be driven to rotate until the bevel gear block 37 rotates to the lower side and engages with the limiting groove 40 to complete the limiting of the sliding plate 28. The rotating cylinder 7 no longer rotates. At this time, the test mold cylinder 4 just rotates 180° to complete the flipping. The electric telescopic rod 19 is retracted, driving the test mold cylinder 4 to slide to the bottom of the compacting hammer 3 again to perform the same number of compacting operations, so that the flipping process does not need to start the drive motor 21 again, thereby avoiding the frequent starting of the drive motor 21 to increase energy consumption and reduce the service life.

[0042] After the compaction is completed, the discharge platform 49 is pulled out, and the discharge trough 50 can be opened, so that the collecting platform 51 is directly below the test mold cylinder 4, and the compacting hammer 3 is driven by a single point to hammer once again, so that the mixture in the test mold cylinder 4 can be pushed downward out of the test mold cylinder 4 and fall onto the top of the buffer pad 52, and the discharge platform 49 is pushed to reset to the bottom of the test mold cylinder 4, and the mixture can be taken out for measurement operation to complete the detection. This reciprocating process can be used to perform the next asphalt mixture stability test, which greatly improves the efficiency of the test and reduces the operating steps of the workers. At the same time, since the asphalt mixture will be in the lower area of ​​the test mold cylinder 4 during the compaction process, after turning over, The mixture will rotate to the upper side, and the flipped through hole 13 will be connected with the nozzle 12 at the bottom again, so the delivery pump 48 can be started again to spray oil, ensuring that the inner wall of the lower side test mold tube 4 of the mixture is smoother after flipping, so that when it is hammered again, the mixture can quickly slide to the bottom and collide with the top of the discharge platform 49, preventing the mixture from sliding to the bottom due to the large side friction. The error of the test is reduced. The device has more comprehensive functions and is more convenient and efficient to operate, which greatly reduces the difficulty of operation for workers and also improves the efficiency and accuracy of detection.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Marshall automatic compactor for asphalt mixture stability testing, characterized in that: include: A base, on which a body is fixedly connected, and a compacting hammer and a test mold cylinder are arranged in the body; Also includes: The flipping mechanism comprises a device box fixedly mounted on the machine body, a rotating cylinder is rotatably connected in the device box, a storage slot is provided on the rotating cylinder and is slidably connected to the outer wall of the trial mold cylinder in a horizontal direction, a flipping member for flipping the rotating cylinder 180° is provided in the base, the flipping mechanism also comprises an electric telescopic rod fixedly mounted on the machine body, the output end of the electric telescopic rod is rotatably connected to the middle part of the side of the trial mold cylinder, the bottom surface of the trial mold cylinder is slidably connected to the top surface of the base in a horizontal direction, the flipping member comprises a gear plate fixedly mounted on the rotating cylinder, a driving motor is fixedly connected to the base, a first gear meshing with the gear plate is coaxially fixedly connected to the output end of the driving motor, a limiting member for limiting the rotation angle of the rotating cylinder is provided on the base, and a force storage member is provided on the base for storing force when the driving motor drives the rotating cylinder to rotate, and automatically drives the rotating cylinder to rotate in the opposite direction when the trial mold cylinder is inserted into the storage slot next time; The oil spraying mechanism includes an oil storage tank fixedly mounted on the base, a nozzle is arranged in the oil storage tank, a through hole connected to the storage tank is opened on the side of the rotating cylinder, and an oil spraying member is arranged in the oil storage tank for driving the nozzle to spray oil on the inner wall of the upper trial mold cylinder when the through hole faces downward; A feeding mechanism, the feeding mechanism comprises a weighing pan mounted on the top of the device box, and an upper side of the device box is provided with a feeding port that can communicate with the through hole; The discharging mechanism is installed on the base.

2. The Marshall automatic compactor for asphalt mixture stability detection according to claim 1, characterized in that: The limiting member includes a fixing tube fixedly mounted on the base, a fixing ring fixedly connected to the side of the fixing tube, a fixing block coaxially fixedly connected to the gear plate, an outer wall of the fixing block slidably connected to a sliding plate in a horizontal direction, an arc groove is provided on the fixing ring, and a limiting block slidably connected to the arc groove is fixedly connected to the outer wall of the sliding plate.

3. The Marshall automatic compactor for asphalt mixture stability detection according to claim 2, characterized in that: The force storage member includes a rotating disk rotatably connected to the base, a first spring fixedly connected to the rotating disk and a sliding disk, a sliding rod coaxially fixedly connected to the rotating disk, a sleeve tube slidably connected to the outer wall of the sliding rod in a horizontal direction, the sleeve tube passes through the gear disk and the fixed block, and is slidably connected to the gear disk and the fixed block in a horizontal direction, a clockwork spring fixedly connected to the outer wall of the fixed block is fixedly connected to the inner wall of the fixed tube, and a control member for limiting the position with the fixed ring is provided on the sliding disk.

4. The Marshall automatic compactor for asphalt mixture stability detection according to claim 3, characterized in that: The control component includes a beveled tooth block slidably connected to the inner wall of the limit block, a second spring fixedly connected to the limit block is fixedly connected to one side of the beveled tooth block, a plurality of groups of beveled tooth grooves that can be engaged with the beveled tooth block are provided in the arc groove, a limit groove slidably connected to the beveled tooth block in a horizontal direction is provided on the base, and a release component is provided on the sliding plate for releasing the limit of the beveled tooth block and the beveled tooth groove when the sleeve tube slides.

5. The Marshall automatic compactor for asphalt mixture stability detection according to claim 4, characterized in that: The release member includes a sliding frame fixedly mounted on the sliding disk, a snap-in block is slidably connected inside the sliding frame, a snap-in groove which is plugged into the snap-in block is provided on the sleeve tube, the tip of the snap-in block is a conical surface, the cross-section of the snap-in groove is an inverted triangle, one end of the snap-in block is fixedly connected to a third spring which is fixedly connected to the sliding frame, and a fourth spring which is fixedly connected to one end of the sliding rod is fixedly connected inside the sleeve tube.

6. The Marshall automatic compactor for asphalt mixture stability detection according to claim 1, characterized in that: The oil spraying part includes a collecting bucket fixedly mounted on the base, the top of the collecting bucket is connected to the through hole, the bottom of the collecting bucket is connected to the oil storage tank, a delivery pump is fixedly connected in the oil storage tank, the input end of the delivery pump is connected to the oil storage tank, and the output end of the delivery pump is connected to the nozzle.

7. The Marshall automatic compactor for asphalt mixture stability detection according to claim 1, characterized in that: The discharging mechanism comprises a discharging platform installed on the base, a discharging trough is provided on the base, the discharging platform is slidably connected to the inner wall of the discharging trough in the horizontal direction, a collecting platform is fixedly connected to the discharging platform, and a buffer pad is stickily connected to the top of the collecting platform.

8. The Marshall automatic compactor for asphalt mixture stability testing according to claim 1, characterized in that: The feeding mechanism also includes a stirring rod installed on the device box.

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