CN214277602U

CN214277602U - Marshall test piece compaction instrument

Info

Publication number: CN214277602U
Application number: CN202120117637.4U
Authority: CN
Inventors: 陆鹏; 陈康见; 张兵
Original assignee: Shaanxi Xingtong Supervision Consulting Co ltd
Current assignee: Shaanxi Xingtong Supervision Consulting Co ltd
Priority date: 2021-01-16
Filing date: 2021-01-16
Publication date: 2021-09-24
Anticipated expiration: 2031-01-16

Abstract

The application relates to the field of asphalt mixture experimental equipment, in particular to a marshall test piece compaction tester, which comprises a case, a power mechanism, a compaction mechanism and a test mold mechanism, wherein the case comprises a base and a case body, and the case body is fixedly arranged on the base; the power mechanism comprises a main motor and a chain transmission assembly, and the main motor drives the chain transmission assembly to operate; the compaction mechanism is fixedly connected with the chain transmission assembly and moves up and down along with the transmission chain; the mold testing mechanism comprises a mold assembly and a measuring assembly, the mold assembly comprises a turntable and a plurality of compaction molds, the turntable is rotatably arranged on the base, and the compaction molds are detachably arranged on the compaction table; the measuring component comprises a height measuring caliper which is vertically and fixedly arranged on one side of the rotary table and used for measuring the thickness of the sample. The method and the device have the effect of improving the defect of low sample result measurement efficiency.

Description

Marshall test piece compaction instrument

Technical Field

The application relates to the field of bituminous mixture experimental equipment, in particular to a marshall test piece compaction tester.

Background

The marshall compaction tester is a special experimental instrument for measuring the stability of the asphalt mixture, and detects the construction quality of the asphalt pavement by measuring the stability of the asphalt mixture.

In the related art, chinese application No. 2019102079330 discloses an automatic surface-changing asphalt mixture marshall compaction apparatus, which comprises a base, a compaction table, a compaction unit, a compaction power unit, an asynchronous lifting mechanism and a pneumatic automatic surface-changing mechanism; the asynchronous lifting mechanism comprises a lifting motor and an asynchronous lifting screw rod, the lifting motor is in transmission connection with the asynchronous lifting screw rod through a transmission belt, and an upper sleeve and a rotary clamp are fixed between the asynchronous lifting screw rods; the pneumatic automatic surface changing mechanism comprises a rotary cylinder and an air compressor, and the rotary cylinder controls the rotary fixture to turn over; the compaction unit comprises a compaction hammer, and the compaction hammer is positioned right above the rotary clamp; the compaction power unit comprises a transmission motor and a transmission chain, the transmission motor drives the transmission chain to operate, the transmission motor drives the transmission chain to generate power for the compaction hammer, the compaction hammer is lifted to a certain height, and the compaction hammer falls down freely to complete compaction work.

The principle of the scheme is as follows: when using marshall to hit real appearance to examine, elevator motor passes through the conveyer belt and drives asynchronous lifting screw and rotate to with upper sleeve and rotary fixture lifting, place bituminous mixture in the below afterwards, drive motor drives the drive chain operation, will hit real hammer lifting and release after certain height when drive chain operation, hit real hammer free fall and hit real to bituminous mixture. After one side is compacted, the rotary cylinder controls the rotary fixture to overturn, so that the other side is compacted.

However, when the above solution is used, the marshall compaction apparatus needs to remove the mold and the sample, and then insert the caliper into the edge of the sample to measure the thickness of the sample, which is inefficient when multiple sets of samples need to be measured.

In view of the above-mentioned related art, the inventors consider that there is a drawback that the efficiency of measuring the result of the sample is low.

SUMMERY OF THE UTILITY MODEL

In order to improve the defect that the result measurement efficiency of the sample is low, the application provides a marshall test piece compaction apparatus.

The application provides a marshall test piece hits real appearance adopts following technical scheme:

a Marshall test piece compaction device comprises a case, a power mechanism, a compaction mechanism and a test model mechanism, wherein the case comprises a base and a box body, and the box body is fixedly arranged on the base; the power mechanism comprises a main motor and a chain transmission assembly, and the main motor is fixedly arranged in the box body and is linked with the chain transmission assembly; the compaction mechanism comprises a compaction hammer, and the compaction hammer is fixedly connected with the chain transmission assembly and reciprocates up and down along with the chain transmission assembly; the mold testing mechanism comprises a mold assembly and a measuring assembly, the mold assembly comprises a turntable and a plurality of compaction molds, the turntable is rotatably arranged on the base, and the compaction molds are detachably arranged on the turntable; the measuring component comprises a height measuring caliper which is vertically and fixedly arranged on one side of the rotary table and used for measuring the thickness of the sample.

By adopting the technical scheme, when the test is carried out, the main motor drives the chain transmission component to operate, the chain transmission component drives the compaction hammer to move up and down when operating, so that a sample in the compaction die is compacted, after the compaction of the sample is completed, the rotary table is rotated to compact the next sample, and the height measuring caliper on one side of the rotary table is used for measuring the thickness of the sample, so that the defect that the measurement efficiency of the sample result is low is overcome.

Optionally, a plurality of trial mold holes are circumferentially arranged on the turntable in an array manner, and the compaction mold is inserted into the trial mold holes; two positioning rods are fixedly arranged on the two sides of the test die hole on the upper surface of the rotary table, two positioning seats are fixedly arranged at the upper end of the compaction die, positioning holes are formed in the positioning seats, and the positioning rods penetrate through the positioning holes.

By adopting the technical scheme, the asphalt mixture sample is poured into the compaction die to be compacted when the test is carried out, the result is measured after the compaction is finished, and then the compaction die is taken down to be demoulded when the demould is needed. The compaction die is positioned by the positioning rod and the positioning seat, so that the compaction die is prevented from rotating to influence compaction effect in compaction to a certain extent.

Optionally, the measuring assembly further comprises a measuring rod, the measuring rod is vertically arranged and located right above the test mold hole, a leveling rod is arranged on the height measuring caliper in a sliding mode, the leveling rod is horizontally arranged, and the upper end of the measuring rod is fixedly connected with the leveling rod.

Through adopting above-mentioned technical scheme, after the sample is hit real, the measuring stick makes measuring stick lower extreme and sample upper surface contact along with the pole gliding of making level, thereby carries out the reading and confirms sample thickness and reachs the experimental result on height measurement slide caliper.

Optionally, the lower end of the measuring rod is fixedly provided with a measuring sheet.

Through adopting above-mentioned technical scheme, avoid measuring stick disect insertion to influence the measuring accuracy in the sample through setting up the measuring sheet.

Optionally, an auxiliary rod is further slidably arranged on the height measuring caliper, and the auxiliary rod is horizontally arranged, and one end of the auxiliary rod is fixedly connected with the measuring rod.

Through adopting above-mentioned technical scheme, further inject the measuring stick to be in the horizontality through setting up the horizon bar to further improve the measuring degree of accuracy.

Optionally, a plurality of rotating stoppers are arranged on the circumferential array of the lower surface of the turntable, and the number of the rotating stoppers is the same as that of the test mold holes; the base is provided with a positioning stop block in a sliding mode, and the positioning stop block is abutted to one of the rotating stop blocks.

Through adopting above-mentioned technical scheme, after a sample is hit real the completion, the pulling location dog makes the location dog no longer with rotate the dog butt, rotate the carousel, the dog that fixes a position resets afterwards, continues to rotate the carousel and rotates dog and location dog butt to next to avoid the too big influence of carousel turned angle to hit real effect to a certain extent.

Optionally, a compaction table is fixedly arranged on the base, and the compaction table is located under the compaction hammer and is abutted to the lower bottom surface of the compaction die.

Through adopting above-mentioned technical scheme, hit real platform and carry out the bearing to hitting real mould when hitting to a certain extent avoid hitting real mould and hit the real effect of hitting to the downstream influence when hitting.

Optionally, a plurality of lower supporting blocks are fixedly arranged on the base below the turntable, pressure springs are fixedly arranged on the upper end faces of the lower supporting blocks, and upper supporting blocks are fixedly arranged on the upper ends of the pressure springs.

Through adopting above-mentioned technical scheme, the bottom suspension piece supports the carousel through pressure spring and last supporting block, avoids hitting the mould to a certain extent and receives to hit the carousel emergence when hitting and topple under the circumstances that does not influence the carousel pivoted.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during compaction test, the compaction die is placed in the turntable, so that the turntable can be rotated to compact one sample after the other sample is compacted, and the measuring assembly measures the thickness of the compacted sample, thereby improving the defect of low sample measuring efficiency to a certain extent;

2. the thickness of the sample can be directly read through the matching of the measuring rod and the height measuring caliper, so that the defect of complicated measuring process is overcome to a certain extent.

Drawings

FIG. 1 is a schematic structural view of a Marshall test piece compaction apparatus according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a power mechanism of a Marshall test piece compaction apparatus according to an embodiment of the present application;

FIG. 3 is a three-dimensional cross-sectional view of a compaction mechanism of a Marshall test piece compaction apparatus in accordance with an embodiment of the present application;

FIG. 4 is a first schematic view of a Marshall specimen compaction apparatus die assembly according to an embodiment of the present disclosure;

FIG. 5 is a second schematic structural view of a Marshall specimen compaction apparatus die assembly in accordance with an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a measuring assembly of a Marshall test piece compaction tester in an embodiment of the present application.

Description of reference numerals: 1. a chassis; 11. a box body; 12. a base; 13. a closing door; 2. a power mechanism; 21. a main motor; 22. a chain drive assembly; 221. a drive chain; 222. a first sprocket; 223. a second sprocket; 3. a compaction mechanism; 31. a guide bar; 311. a slide chamber; 312. a guide spring; 32. a compaction hammer; 33. a compaction head; 4. a mold testing mechanism; 41. a mold assembly; 411. a turntable; 4111. testing a die hole; 4112. positioning a rod; 4113. rotating the stop block; 4114. a slideway; 4115. positioning a stop block; 412. compacting the mould; 4121. positioning seats; 4122. positioning holes; 413. a compaction table; 414. a lower support block; 4141. a pressure spring; 4142. an upper support block; 42. a measurement assembly; 421. measuring a height caliper; 422. a measuring rod; 423. measuring the sheet; 424. leveling the rod; 425. an auxiliary lever.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses marshall test piece hits real appearance. Referring to fig. 1 and 2, the marshall test piece compaction tester comprises a case 1, a power mechanism 2, a compaction mechanism 3 and a test mechanism 4, wherein the case 1 comprises a case body 11 and a base 12, and the case body 11 is welded and fixed on the base 12. The power mechanism 2 comprises a main motor 21 and a chain transmission assembly 22, the main motor 21 is fixed in the box body 11 through a bolt, and the main motor 21 drives the chain transmission assembly 22 to operate. The compaction mechanism 3 comprises a guide rod 31, a compaction hammer 32 and a compaction head 33, wherein the guide rod 31 is vertically arranged and is welded and fixed with the box body 11, the compaction head 33 is arranged at the lower end of the guide rod 31 in a sliding manner, and the compaction hammer 32 is arranged on the guide rod 31 in a sliding manner and is fixedly connected with the chain transmission assembly 22. The mold testing mechanism 4 comprises a mold assembly 41 and a measuring assembly 42, the mold assembly 41 comprises a turntable 411 and six compaction molds 412, the turntable 411 is rotatably arranged on the base 12 through a bearing, and the compaction molds 412 are circumferentially arranged on the turntable 411 in an array. The measuring assembly 42 includes a height measuring caliper 421, and the height measuring caliper 421 is vertically disposed and welded on the base 12.

When a Marshall experiment test is carried out, the asphalt mixture is prepared as required and then placed in compaction moulds 412, the turntable 411 is rotated to enable one compaction mould 412 to be located under the compaction hammer 33, then the main motor 21 is started to drive the compaction hammer 32 to move upwards through the chain transmission assembly 22, the main motor 21 is closed to release the compaction hammer 32 after the compaction hammer 32 rises to a certain height, the compaction hammer 33 is struck when the compaction hammer 32 falls, the compaction hammer 33 strikes a sample in the compaction mould 412, the turntable 411 is rotated to strike another sample after one sample is struck, and the height measuring caliper 421 measures the thickness of the sample which is struck, so that the defect that the sample measuring efficiency is low is improved.

Specifically, the chain transmission assembly 22 includes a transmission chain 221, a first chain wheel 222 and a second chain wheel 223, referring to fig. 2, the first chain wheel 222 is fixedly mounted on the output shaft of the main motor 21 through a key connection, the second chain wheel 223 is rotatably disposed in the box body 11 through a bearing, the second chain wheel 223 is located right below the first chain wheel 222, the transmission chain 221 is meshed with the first chain wheel 222 and is in meshed transmission with the second chain wheel 223, and a side surface of the box body 11 is rotatably provided with the closing door 13 through a hinge.

When the Marshall compaction device is used, the main motor 21 is started to drive the first chain wheel 222 to rotate, the first chain wheel 222 drives the transmission chain 221 to run through meshing transmission, and therefore the compaction hammer (32) is driven to move. The closing door 13 is closed to prevent danger when the compaction device works, and the closing door 13 can be opened to clean and overhaul the power mechanism 2 when the compaction device stops working.

Further, the guide rod 31 is vertically welded and fixed in the box body 11 and is welded and fixed with the inner wall of the box body 11 through angle steel, so that the guide rod 31 is reinforced. Referring to fig. 3, a sliding cavity 311 is formed at the lower end of the guide rod 31, a guide spring 312 is welded and fixed on the inner wall of the upper side of the sliding cavity 311, and the compaction head 33 is slidably arranged in the sliding cavity 311 and the upper end of the compaction head is welded and fixed with the guide spring 312. The compaction hammer 32 is slidably sleeved on the guide rod 31, and the outer side of the compaction hammer 32 is welded and fixed with the transmission chain 221.

When the compaction device works, the main motor 21 drives the transmission chain 221 to move upwards, the transmission chain 221 drives the compaction hammers 32 to move upwards together when moving upwards, when the compaction hammers 32 rise to a certain height, the main motor 21 is closed, the compaction hammers 32 fall under the action of gravity to strike the compaction heads 33, and the compaction heads 33 compact the samples below. Then the main motor 21 is started again to drive the compaction hammer 32 to move upwards again, so that repeated compaction on the sample is realized.

Referring to fig. 4 and 5, the turntable 411 is rotatably disposed on the base 12 through a bearing, six mold testing holes 4111 are circumferentially arranged on the turntable 411 in an array manner, two positioning rods 4112 are symmetrically welded to two sides of the mold testing holes 4111, two positioning seats 4121 are symmetrically welded to two sides of the upper end of the compaction mold 412, positioning holes 4122 are formed in the positioning seats 4121, the compaction mold 412 is inserted into the mold testing holes 4111, and the positioning rods 4112 pass through the positioning holes 4122. The circumference array is provided with six and rotates dog 4113 on the terminal surface under carousel 411, rotates dog 4113 and carousel 411 welded fastening, and slide 4114 has been seted up to base 12, slides in slide 4114 and is provided with location dog 4115, and location dog 4115 can slide along the carousel 411 radial direction. The compacting table 413 is disposed under the upper guide rod 31 of the base 12, and in this embodiment, the compacting table 413 is made of solid wood and is fixedly connected to the base 12 by tapping screws.

When a marshall compaction test is carried out, the prepared asphalt mixture is placed in a compaction die 412, then the rotary table 411 is rotated to a rotary stop 4113 to abut against a positioning stop 4115, at the moment, the compaction die 412 is positioned under a compaction head 33, the compaction head 33 repeatedly compacts a sample in the compaction die 412 under the driving of the main motor 21, the main motor 21 is closed after compaction is completed, the rotary table 411 is rotated after the positioning stop 4115 is radially pushed along the rotary table 411, then the rotary table 411 is continuously rotated after the positioning stop 4115 is reset, the rotary table 411 is rotated to the positioning stop 4115 to abut against the next rotary stop 4113, and at the moment, the other compaction die 412 is rotated to the position under the compaction head 33 to compact.

Referring to fig. 5, four lower support blocks 414 are welded and fixed to the base 12 below the turntable 411, a pressure spring 4141 is welded and fixed to the upper end of each support block, an upper support block 4142 is welded and fixed to the upper end of each pressure spring 4141, and the upper end surface of each upper support block 4142 abuts against the lower bottom surface of the turntable 411. The upper support block 4142 supports the turntable 411 by the pressure spring 4141, thereby supporting the turntable 411 without affecting the rotation of the turntable 411.

After the sample is hit real the measuring component 42 measures it, refer to fig. 6, measuring component 42 still includes measuring stick 422, measuring piece 423, make level pole 424 and auxiliary rod 425, height-finding caliper 421 is vertical to be set up at carousel 411 lateral part and with base 12 welded fastening, make level pole 424 one end welding has a sleeve pipe, the sleeve pipe cover is established on height-finding caliper 421 and with height-finding caliper 421 sliding connection, measuring stick 422 is vertical to be set up and the upper end and make level pole 424 welded fastening, measuring piece 423 level sets up and welded fastening is at measuring stick 422 lower extreme. The auxiliary rod 425 is horizontally disposed, one end of the auxiliary rod is welded and fixed to the measuring rod 422, and the other end of the auxiliary rod is connected with the height measuring caliper 421 in a sliding mode through a sleeve. The measuring rod 422 is located right above a test hole 4111, and the leveling rod 424 is located at the zero scale of the height measuring caliper 421 when the measuring piece 423 contacts with the bottom surface of the inner side of the compaction mold 412.

After the sample is compacted in the compacting die 412, the rotating disc 411 is rotated to rotate the compacting die 412 to a position right below the measuring rod 422, then the measuring rod 422 is slid downwards to enable the measuring piece 423 to be abutted against the upper surface of the sample, and then the reading of the height measuring caliper 421 is read, namely the thickness of the sample after compaction.

The implementation principle of marshall test piece compaction appearance of this application embodiment does: when the marshall compaction apparatus is used, the prepared sample is placed in the compaction die 412, then the main motor 21 drives the transmission chain 221 to rotate, so that the compaction hammer 32 is lifted, the main motor 21 is turned off after the compaction hammer 32 is lifted to a certain height, then the compaction hammer 32 falls down to strike the compaction head 33, the compaction head 33 is struck to compact the sample, then the main motor 21 is started again to lift the compaction hammer 32, and the sample is compacted repeatedly.

When compaction of one sample is completed, the turntable 411 is rotated to rotate the other compaction die 412 to a position just below the compaction head 33, so that compaction of another sample is performed. And meanwhile, the measuring rod 422 is slid downwards, so that the measuring piece 423 is abutted against the upper surface of the sample which is compacted, and then the height measuring caliper 421 reads the thickness of the sample which is compacted.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A Marshall test piece compaction instrument comprises a case (1), a power mechanism (2) and a compaction mechanism (3), wherein the case (1) comprises a base (12) and a box body (11), and the box body (11) is fixedly arranged on the base (12); the power mechanism (2) comprises a main motor (21) and a chain transmission assembly (22), wherein the main motor (21) is fixedly arranged in the box body (11) and is linked with the chain transmission assembly (22); the compaction mechanism (3) comprises a compaction hammer (32), and the compaction hammer (32) is fixedly connected with the chain transmission assembly (22) and reciprocates up and down along with the chain transmission assembly (22); the method is characterized in that: the device is characterized by further comprising a die testing mechanism (4), wherein the die testing mechanism (4) comprises a die assembly (41) and a measuring assembly (42), the die assembly (41) comprises a turntable (411) and a plurality of compaction dies (412), the turntable (411) is rotatably arranged on the base (12), and the compaction dies (412) are detachably arranged on the turntable (411); the measuring component (42) comprises a height measuring caliper (421), wherein the height measuring caliper (421) is vertically arranged on the base (12) and one side of the box body (11) is used for measuring the thickness of a sample.

2. The marshall test piece compaction apparatus of claim 1, wherein: a plurality of test mold holes (4111) are formed in the turntable (411) in a circumferential array mode, and the compaction mold (412) is inserted into the test mold holes (4111); two positioning rods (4112) are fixedly arranged on two sides of the test mold hole (4111) on the upper surface of the turntable (411), two positioning seats (4121) are fixedly arranged at the upper end of the compaction mold (412), positioning holes (4122) are formed in the positioning seats (4121), and the positioning rods (4112) penetrate through the positioning holes (4122).

3. The marshall test piece compaction apparatus of claim 2, wherein: the measuring component (42) further comprises a measuring rod (422), the measuring rod (422) is vertically arranged and located right above a test mold hole (4111), a leveling rod (424) is arranged on the height measuring caliper (421) in a sliding mode, the leveling rod (424) is horizontally arranged, and the upper end of the measuring rod (422) is fixedly connected with the leveling rod (424).

4. The marshall test piece compaction tester of claim 3, wherein: the lower end of the measuring rod (422) is fixedly provided with a measuring piece (423).

5. The marshall test piece compaction tester of claim 3, wherein: an auxiliary rod (425) is further arranged on the height measuring caliper (421) in a sliding mode, the auxiliary rod (425) is horizontally arranged, and one end of the auxiliary rod is fixedly connected with the measuring rod (422).

6. The marshall test piece compaction apparatus of claim 2, wherein: a plurality of rotating stop blocks (4113) are arranged on the circumferential array of the lower surface of the rotary table (411), and the number of the rotating stop blocks (4113) is the same as that of the test mold holes (4111); base (12) go up the slip and be provided with location dog (4115), location dog (4115) with one of them rotation dog (4113) butt.

7. The marshall test piece compaction apparatus of claim 2, wherein: the compaction device is characterized in that a compaction table (413) is fixedly arranged on the base (12), and the compaction table (413) is positioned under the compaction hammer (32) and is abutted against the lower bottom surface of the compaction die (412).

8. The marshall test piece compaction apparatus of claim 2, wherein: a plurality of lower supporting blocks (414) are fixedly arranged on the base (12) below the rotary table (411), pressure springs (4141) are fixedly arranged on the upper end faces of the lower supporting blocks (414), upper supporting blocks (4142) are fixedly arranged at the upper ends of the pressure springs (4141), and the upper end faces of the upper supporting blocks (4142) are abutted to the lower bottom face of the rotary table (411).