CN116296929A - Iron tailing sand asphalt concrete rutting test device - Google Patents

Iron tailing sand asphalt concrete rutting test device Download PDF

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Publication number
CN116296929A
CN116296929A CN202310504932.9A CN202310504932A CN116296929A CN 116296929 A CN116296929 A CN 116296929A CN 202310504932 A CN202310504932 A CN 202310504932A CN 116296929 A CN116296929 A CN 116296929A
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rotating
plate
rotating plate
roller
reciprocating
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Granted
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CN202310504932.9A
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CN116296929B (en
Inventor
卿黎
程子涵
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0032—Generation of the force using mechanical means
    • G01N2203/0033—Weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention provides an iron tailing sand asphalt concrete rut test device, which comprises: the first rotating plate is parallel to the second rotating plate, the first rotating plate and the second rotating plate are rotatably mounted on the test box body, the clamping unit is used for limiting the position of the test piece to be tested, the roller is located between the first rotating plate and the second rotating plate, the roller is slidably mounted on the second rotating plate, the roller rolls on the upper end face of the test piece to be tested in a reciprocating mode, the reciprocating moving assembly provides reciprocating moving power for the roller, the pressure adjusting unit is used for applying pressure to the roller, and the centrifugal force simulating unit is used for applying centrifugal force to the roller. According to the test piece testing device, the rotating angle of the test piece to be tested can be driven through the first rotating plate and the second rotating plate which are arranged in a rotating mode, so that when a curve is simulated, the road surface state in an inclined state can apply force to the roller through the centrifugal force simulation unit, and therefore the centrifugal force generated when the wheel is bent is simulated.

Description

Iron tailing sand asphalt concrete rutting test device
Technical Field
The invention belongs to the field of rutting test devices, and particularly relates to an iron tailing sand asphalt concrete rutting test device.
Background
Because of more mines in China, the iron tailings produced in each place have different components, for example, the high-silicon iron tailings in the Anshan area have the SiO2 content of more than 70 percent (mass fraction), and generally do not contain associated elements; the high-calcium magnesium-type iron tailings in Handan area generally contain associated elements; the low-calcium magnesium type iron tailings are mainly distributed in areas such as wine and steel and contain associated elements such as Co, ni, ge and the like.
In the process of applying the iron tailings to the asphalt concrete, the iron tailings with different components have an influence on the performance of the asphalt concrete, so various tests are required to determine the optimal proportion of the iron tailings with different components in the asphalt concrete. In the course of applying asphalt concrete to road construction, a rutting test is an indispensable test for determining the dynamic stability of iron tailing sand asphalt concrete.
The invention patent CN107044943B discloses a "comparative automatic rut tester", which specifically discloses that different pressures can be applied to a concrete test piece by a test car arranged at the upper end of a frame, but the tester cannot feed back the rut test state of wheels in a turning state.
Therefore, the conventional rut test device has the following defects: the concrete test cannot be subjected to a rut test in a curve state, and the real pavement environment cannot be completely simulated.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is directed to providing an iron tailing sand asphalt concrete rut test device, which is used for solving the problem that in the prior art, the rut test cannot be performed on concrete in a curve state, and the real road surface environment cannot be completely simulated.
To achieve the above and other related objects, the present invention provides an iron tailing sand asphalt concrete rut test apparatus comprising:
the test box body is provided with an opening for placing or taking out a test piece to be tested;
the first rotating plate is parallel to the second rotating plate, the first rotating plate is positioned below the second rotating plate, the first rotating plate and the second rotating plate are rotatably arranged in the test box, and the rotating axis of the first rotating plate is parallel to the rotating axis of the second rotating plate;
the clamping unit is arranged on the first rotating plate and used for limiting the position of the test piece to be tested;
the front-back moving unit comprises a reciprocating moving assembly and a roller, the roller is positioned between the first rotating plate and the second rotating plate, the roller is rotatably arranged on a roller mounting seat, the roller mounting seat is slidably arranged on the second rotating plate, and the roller rolls back and forth on the upper end surface of a test piece to be tested;
the rolling direction of the roller is parallel to the rotating axis direction of the first rotating plate, the sliding direction of the roller mounting seat is parallel to the rolling direction of the roller, and the reciprocating moving assembly provides reciprocating moving power for the roller mounting seat;
the pressure adjusting unit is arranged on the second rotating plate and is used for applying pressure to the roller, and the direction of the pressure applied by the pressure adjusting unit is vertical to the upper end face of the test piece to be tested;
and the centrifugal force simulation unit is used for applying centrifugal force to the roller, and the direction of the centrifugal force is perpendicular to the rolling direction of the roller.
As an alternative scheme, the test device further comprises a first rotating power unit for driving the first rotating plate to rotate, wherein the first rotating power unit comprises a sliding block, a first connecting rod and a linear power element;
the sliding block is slidably arranged in the test box body below the first rotating plate, and the sliding direction of the sliding block is perpendicular to the rotating axis direction of the first rotating plate;
the first connecting rod is hinged between the sliding block and the first rotating plate, and the rotating axis direction of the first connecting rod is parallel to the rotating axis direction of the first rotating plate;
the linear power element is fixed in the test box body and provides sliding power for the sliding block.
As an alternative scheme, the test device further comprises a second rotating power unit for driving the second rotating plate to rotate, and the second rotating power unit comprises a second connecting rod;
one end of the second connecting rod is hinged on the first rotating plate through a first hinge, the other end of the second connecting rod is hinged on the second rotating plate through a second hinge, and the rotating axis direction of the second connecting rod is parallel to the rotating axis direction of the second rotating plate;
the axis of the first hinge and the rotation axis of the first rotating plate are located on the same plane, the plane is a first plane, the axis of the second hinge and the rotation axis of the second rotating plate are located on the same plane, the plane is a second plane, and the first plane and the second plane are parallel;
the distance between the axis of the first hinge and the rotation axis of the first rotation plate is equal to the distance between the axis of the second hinge and the rotation axis of the second rotation plate.
As an alternative, the clamping unit comprises four compacting blocks, four rotating shafts, a through hole, four first gears, a second gear, a supporting plate, a rotating power element and a first lifting power element;
the cross section of the test piece to be tested is square, the four compacting blocks are respectively positioned at the front, back, left and right sides of the test piece to be tested, and the four compacting blocks are arranged in a circular equal-angle array along the center line of the test piece to be tested;
the support plate is positioned below the first rotating plate, a through hole penetrating through the upper end face and the lower end face of the first rotating plate is formed in the first rotating plate, one end of the rotating shaft is rotatably installed on the support plate, the other end of the rotating shaft penetrates through the through hole to be fixedly connected with the compression block, and the axial direction of the rotating shaft is perpendicular to the upper end face of the test piece to be tested;
the four first gears are respectively fixed on the rotating shaft, the second gears are rotatably arranged on the supporting plate, the first gears are meshed with the second gears, and the rotating power element provides rotating power for the second gears;
the diameter of the through hole is larger than or equal to that of the rotating shaft;
the first lifting power element is fixedly arranged on the lower end face of the first rotating plate, the telescopic end of the first lifting power element is fixedly connected with the supporting plate, and the telescopic direction of the first lifting power element is parallel to the axial direction of the rotating shaft;
the connecting line of the middle point of the upper boundary and the middle point of the lower boundary of the side end surface of the test piece to be tested is a first straight line, the distance between the axis of the rotating shaft and the first straight line is n, and the length of the compaction block is m, wherein m=n;
the distance between the axis of the rotating shaft and the test piece to be tested is smaller than the length of the compression block.
As an alternative scheme, the plurality of clamping units are arranged on the first rotating plate, and the plurality of clamping units are limited with test pieces to be tested;
the number of the rollers is also multiple, and the multiple rollers roll on the upper end faces of the multiple test pieces to be tested respectively.
Alternatively, the reciprocating assembly includes a reciprocating plate, a support column, and a reciprocating power element;
the reciprocating plate is movably arranged on the second rotating plate, the moving direction of the reciprocating plate is parallel to the rolling direction of the roller, the support column is arranged on the reciprocating plate, and the roller is rotatably arranged on the support column;
the reciprocating power element provides reciprocating power for the reciprocating plate.
Alternatively, the reciprocating power element is a motor, a turntable, a third connecting rod, a sleeve and a sliding rod;
the motor is fixedly arranged on the second rotating plate, the rotating disc is fixedly arranged on the motor shaft, the axial direction of the rotating disc is perpendicular to the moving direction of the reciprocating plate, one end of the third connecting rod is hinged to the eccentric position of the rotating disc, the other end of the third connecting rod is fixedly provided with a sleeve, the sleeve is movably sleeved on the sliding rod, the sleeve can slide and rotate on the sliding rod, the axial line of the sleeve is parallel to the axial line of the rotating disc, the axial line direction of the rotation of the third connecting rod is parallel to the axial line direction of the rotating disc, and the sliding rod is fixedly arranged on the reciprocating plate.
Alternatively, the pressure adjusting unit comprises a lifting plate, a mounting plate, a pressure sensor and a second lifting power element;
the support column slides and penetrates through the upper end face and the lower end face of the reciprocating moving plate, and the sliding direction of the support column is perpendicular to the upper end face of the test piece to be tested;
the mounting plate is positioned above the support column, the pressure sensor is arranged between the mounting plate and the support column, and the pressure sensor is used for monitoring the pressure between the mounting plate and the support column;
the lifting plate is fixedly connected with the mounting plate, the second lifting power element is fixedly mounted on the reciprocating plate, the telescopic end of the second lifting power element is fixedly connected with the lifting plate, and the telescopic direction of the second lifting power element is parallel to the sliding direction of the support column.
As an alternative, the centrifugal force simulation unit comprises two guiding modules, and the two guiding modules are respectively arranged at the left side and the right side of the moving direction of the reciprocating plate;
the guide module comprises a sliding rod, a rolling wheel, a limiting guide block, a first through groove, a second through groove and a guide groove;
the sliding rod is rotatably arranged on the reciprocating moving plate, and the rotating axis direction of the sliding rod is perpendicular to the rolling direction of the roller;
the rolling wheel is arranged on the sliding rod in a sliding manner, and the sliding direction of the rolling wheel is parallel to the upper end face of the test piece to be tested;
the reciprocating plate is positioned above the second rotating plate, the first through groove is formed in the second rotating plate and penetrates through the upper end face and the lower end face of the second rotating plate, and the width of the first through groove is larger than the diameter of the supporting column;
the limiting guide block is fixedly arranged on the upper end face of the second rotating plate, the second through groove is formed in the limiting guide block and penetrates through the front side wall and the rear side wall of the limiting guide block, the guide groove is formed in the bottom end face of the second through groove, the guide direction of the guide groove is parallel to the rolling direction of the roller, and the rolling wheel rolls along the guide direction of the guide groove;
the centrifugal force simulation unit also comprises a mounting frame body and a telescopic hydraulic cylinder;
the mounting frame body is positioned above the second rotating plate, the sliding rod is positioned in the mounting frame body, and the axis of the sliding rod is vertical to the front side wall of the mounting frame body;
the front side wall of the installation frame body is attached to the end face of the sliding rod of one guide module, and the rear side wall of the installation frame body is attached to the end face of the sliding rod of the other guide module;
the telescopic hydraulic cylinder is fixedly arranged on the second rotating plate, the telescopic direction of the telescopic hydraulic cylinder is perpendicular to the rolling direction of the roller, and the telescopic end of the telescopic hydraulic cylinder is fixedly connected with the mounting frame body.
Alternatively, the centrifugal force simulation unit further comprises a ball guide groove and balls;
the front side inner wall and the rear side inner wall of the mounting frame body are respectively provided with a ball guide groove, and the guide direction of the ball guide grooves is parallel to the rolling direction of the rollers;
the ball rolls and inlays the terminal surface of establishing at the slide bar, the ball rolls in the ball guide way.
As described above, the iron tailing sand asphalt concrete rutting test device provided by the invention has at least the following beneficial effects:
1. according to the method, the first rotating plate and the second rotating plate which rotate are arranged, so that the test piece to be tested can be in an inclined state, and the curve state of the test piece to be tested can be simulated;
2. according to the method, the centrifugal force simulation unit is arranged, so that force in the left-right direction can be applied to the roller, and after the roller moves forwards and backwards, the simulation of the centrifugal force of the wheel is realized, and the real road surface condition can be better simulated;
3. according to the method, through the first connecting rod and the second connecting rod, when the first rotating plate rotates, the second rotating plate can be driven to rotate by the same intersection, so that the contact state between the idler wheel and a test piece to be tested can be kept consistent, and the consistency of a test is ensured;
4. this application is through four compact blocks that set up, when placing the test piece that awaits measuring on first rotating plate, drive the compact block through first lift power component and rise to the middle part position of test piece that awaits measuring, start and rotate power component, drive the synchronous rotation of pivot through second gear and four first gears, thereby drive the compact block and rotate towards the test piece that awaits measuring, because the turned angle of compact block is the same, so the compact block can contact with the test piece that awaits measuring simultaneously, when the compact block continues to rotate, the compact block can promote the test piece that awaits measuring to the positive middle of four compact blocks, thereby can guarantee that each test piece that awaits measuring all is located the same position, guarantee the experimental uniformity of all test pieces that await measuring.
Drawings
FIG. 1 is a schematic view showing the structure of a test chamber of the present invention in an opened state;
FIG. 2 shows a partial enlarged view of the invention at A in FIG. 1;
FIG. 3 shows a cross-sectional view of the structure of the present invention;
FIG. 4 shows a partial enlarged view of the invention at B in FIG. 3;
FIG. 5 is a top view of a test piece to be tested positioned by the hold-down block of the present invention;
FIG. 6 is a schematic view of a first rotary power unit according to the present invention;
FIG. 7 is a cross-sectional view showing the structure of the clamping unit of the present invention;
FIG. 8 is a schematic diagram showing the structures of a pressure adjusting unit and a centrifugal force simulation unit according to the present invention;
FIG. 9 shows a partial enlarged view of the invention at C in FIG. 8;
fig. 10 is a schematic view showing the structure of the support column, the roller, the pressure sensor and the mounting plate of the present invention.
In the figure: 101. a test box; 102. a first rotating plate; 103. a second rotating plate; 104. a slide block; 105. a first link; 106. a linear power element; 107. a second link;
201. a test piece to be tested; 202. a compaction block; 203. a rotating shaft; 204. a through hole; 205. a first gear; 206. a second gear; 207. a support plate; 208. rotating the power element; 209. a first lifting power element;
301. a roller; 302. a reciprocating plate; 303. a support column; 304. a motor; 305. a turntable; 306. a third link; 307. a sleeve; 308. a slide bar;
401. a lifting plate; 402. a mounting plate; 403. a pressure sensor; 404. a second lifting power element;
501. a slide bar; 502. a rolling wheel; 503. limiting guide blocks; 504. a first through groove; 505. a second through slot; 506. a guide groove; 507. installing a frame body; 508. a telescopic hydraulic cylinder; 509. a ball; 510. ball guide groove.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 10. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.
Referring to fig. 1 to 10, the present invention provides an iron tailing sand asphalt concrete rut test apparatus, comprising:
the test box body 101, wherein an opening for putting in or taking out the test piece 201 to be tested is formed in the test box body 101;
the opening of the test box body 101 is provided with a door plate, the door plate can open and close the opening, the door plate can be rotatably arranged on the test box body 101, and the door plate can also be slidably arranged on the test box body 101;
a first rotating plate 102 and a second rotating plate 103, wherein the first rotating plate 102 is parallel to the second rotating plate 103, the first rotating plate 102 is positioned below the second rotating plate 103, the first rotating plate 102 and the second rotating plate 103 are rotatably installed in the test box 101, and the rotating axis of the first rotating plate 102 is parallel to the rotating axis of the second rotating plate 103;
a clamping unit disposed on the first rotating plate 102, the clamping unit being used for defining a position of the test piece 201 to be tested;
a back and forth movement unit including a reciprocating assembly and a roller 301;
the roller 301 is located between the first rotating plate 102 and the second rotating plate 103, the roller 301 is rotatably installed on a roller installation seat, the roller installation seat is slidably installed on the second rotating plate 103, and the roller 301 rolls reciprocally on the upper end face of the test piece 201 to be tested;
the rolling direction of the roller 301 is parallel to the rotation axis direction of the first rotating plate 102, the sliding direction of the roller mounting seat is parallel to the rolling direction of the roller 301, and the reciprocating component provides reciprocating power for the roller mounting seat;
a pressure adjusting unit, which is disposed on the second rotating plate 103, and is used for applying pressure to the roller 301, and the direction of the pressure applied by the pressure adjusting unit is perpendicular to the upper end surface of the test piece 201 to be tested;
and a centrifugal force simulation unit for applying a centrifugal force to the roller 301 in a direction perpendicular to a rolling direction of the roller 301.
Because the vehicle can generate outward centrifugal force when running at the turning position, the pavement at the turning position of the road is inclined so as to offset the generated centrifugal force;
when the rut test simulation of the curved road surface is performed, the first rotating plate 102 is rotated, so that the test piece 201 to be tested is in an inclined state to simulate the curved road surface; the pressure adjusting unit applies downward pressure to the roller 301, thereby simulating the rut test of different kinds of vehicles on the test piece 201 to be tested; the centrifugal force simulation unit applies a force perpendicular to the rolling direction of the roller 301, so that the centrifugal force of the roller 301 at a curve can be simulated, and the reciprocating assembly drives the roller 301 to roll on the test piece 201 to be tested, so that continuous rolling of the wheel is simulated.
In this embodiment, referring to fig. 3 and 6, the test apparatus further includes a first rotating power unit that drives the first rotating plate 102 to rotate, where the first rotating power unit includes a slider 104, a first connecting rod 105, and a linear power element 106;
the sliding block 104 is slidably installed in the test box body 101 below the first rotating plate 102, and the sliding direction of the sliding block 104 is perpendicular to the rotating axis direction of the first rotating plate 102;
the first connecting rod 105 is hinged between the sliding block 104 and the first rotating plate 102, and the rotating axis direction of the first connecting rod 105 is parallel to the rotating axis direction of the first rotating plate 102;
the linear power element 106 is fixed in the test box body 101, and the linear power element 106 provides sliding power for the sliding block 104;
the linear power element 106 may be an electric telescopic rod, a hydraulic cylinder or a ball screw.
When the first rotating plate 102 needs to be driven to rotate, the linear power element 106 is started to drive the sliding block 104 to slide, so that the first connecting rod 105 is pushed to rotate, the first rotating plate 102 is driven to rotate, and the inclined state of the curve road surface of the test piece 201 to be tested fixed on the first rotating plate 102 is simulated.
In this embodiment, referring to fig. 3, the test apparatus further includes a second rotating power unit that drives the second rotating plate 103 to rotate, where the second rotating power unit includes a second connecting rod 107;
one end of the second connecting rod 107 is hinged on the first rotating plate 102 through a first hinge, the other end of the second connecting rod 107 is hinged on the second rotating plate 103 through a second hinge, and the rotating axis direction of the second connecting rod 107 is parallel to the rotating axis direction of the second rotating plate 103;
the axis of the first hinge is located on the same plane as the rotation axis of the first rotating plate 102, and the plane is a first plane, the axis of the second hinge is located on the same plane as the rotation axis of the second rotating plate 103, and the plane is a second plane, and the first plane is parallel to the second plane;
the distance between the axis of the first hinge and the axis of rotation of the first rotation plate 102 is equal to the distance between the axis of the second hinge and the axis of rotation of the second rotation plate 103.
When the first rotating plate 102 rotates, the second rotating plate 103 can be driven to rotate by the second connecting rod 107, and the axis of the first hinge, the axis of the first rotating plate 102, the axis of the second hinge and the axis of the second rotating plate 103 enclose a parallelogram or a rectangle, so that the rotating angle of the second rotating plate 103 is the same as the rotating angle of the first rotating plate 102, and the rotating axis of the roller 301 and the upper end face of the test piece 201 to be tested are parallel in various curves.
In this embodiment, referring to fig. 2, 5 and 7, the clamping unit includes four pressing blocks 202, four rotating shafts 203, a through hole 204, four first gears 205, a second gear 206, a supporting plate 207, a rotating power element 208 and a first lifting power element 209;
the cross section of the test piece 201 to be tested is square, four compacting blocks 202 are respectively positioned on the front side, the back side, the left side and the right side of the test piece 201 to be tested, and the four compacting blocks 202 are arranged in a circular equiangular array along the center line of the test piece 201 to be tested;
the supporting plate 207 is located below the first rotating plate 102, a through hole 204 penetrating through the upper end face and the lower end face of the first rotating plate 102 is formed in the first rotating plate 102, one end of the rotating shaft 203 is rotatably installed on the supporting plate 207, the other end of the rotating shaft 203 penetrates through the through hole 204 to be fixedly connected with the compression block 202, and the axial direction of the rotating shaft 203 is perpendicular to the upper end face of the test piece 201 to be tested;
the four first gears 205 are respectively fixed on the rotating shaft 203, the second gear 206 is rotatably installed on the supporting plate 207, the first gears 205 are meshed with the second gears 206, and the rotating power element 208 provides rotating power for the second gears 206;
the diameter of the through hole 204 is larger than or equal to the diameter of the rotating shaft 203;
the first lifting power element 209 is fixedly installed on the lower end surface of the first rotating plate 102, a telescopic end of the first lifting power element 209 is fixedly connected with the supporting plate 207, and a telescopic direction of the first lifting power element 209 is parallel to an axial direction of the rotating shaft 203;
the connection line between the upper boundary midpoint of the side end surface of the test piece 201 to be tested and the lower boundary midpoint thereof is a first straight line, the distance between the axis of the rotating shaft 203 and the first straight line is n, and the length of the pressing block 202 is m, m=n;
the distance between the axis of the rotating shaft 203 and the test piece 201 to be tested is smaller than the length of the pressing block 202;
after the test piece 201 to be tested is placed between the four rotating shafts by limiting the length of the compression block, the compression block 202 is driven to rotate by the rotation of the rotating shaft 203, when the test piece 201 to be tested is not positioned in the middle of the four rotating shafts, the compression block 202 is firstly contacted with the side wall of the test piece 201 to be tested, the four compression blocks 202 are driven to continue rotating, the compression block 202 can push the test piece 201 to be tested to move towards the middle of the four rotating shafts, and when the end part of the compression block 202 rotates to be contacted with the first straight line of the side end face of the test piece 201 to be tested, the fact that the test piece 201 to be tested is positioned in the middle of the four rotating shafts is indicated.
The first lifting power element 209 may be an electric telescopic rod or a hydraulic cylinder; the rotary power element 208 can be a motor, or can be a motor and a belt, wherein the motor is fixed on the supporting plate 207, and a motor shaft of the motor is connected with the second gear 206 through the belt for transmission.
When the test piece 201 to be tested is required to be placed on the first rotating plate 102, the rotating power element 208 is started to rotate positively, and the compression blocks 202 are driven to rotate through the second gear 206, the first gear 205 and the rotating shaft 203, so that the area between the compression blocks 202 is exposed, and the test piece 201 to be tested is placed between the rotating shafts 203;
the first lifting power element 209 ascends, the supporting plate 207 drives the compression block 202 to ascend, when the compression block 202 is positioned between the upper end face and the lower end face of the test piece 201 to be tested, the rotary power element 208 is started to drive the compression block 202 to rotate, so that the side wall of the compression block 202 is driven to apply pressure to the middle, the test piece 201 to be tested is stirred to the middle of the rotating shaft 203, and therefore the test pieces 201 to be tested can be guaranteed to be positioned at the same position;
the first lifting power element 209 is started to continuously ascend, so that the compression block 202 is driven to ascend, the rotary power element 208 is started to drive the compression block 202 to rotate to the upper side of the test piece 201 to be tested, the first lifting power element 209 is started to descend, and the compression block 202 is driven to descend, so that the compression block 202 fixes the test piece 201 to be tested on the first rotary plate 102.
In this embodiment, referring to fig. 1 and 6, a plurality of clamping units are provided, each of which is disposed on the first rotating plate 102, and each of which defines a test piece 201 to be tested;
the number of the rollers 301 is also plural, and the plurality of rollers 301 roll on the upper end surfaces of the plurality of test pieces 201 to be tested.
Through the plurality of clamping units and the rollers 301, a plurality of test pieces 201 to be tested can be tested at the same time;
the plurality of test pieces can be asphalt concrete test pieces of a plurality of iron tailings with the same proportion, and also can be asphalt concrete test pieces of one iron tailings with different proportions.
In this embodiment, referring to fig. 8, the reciprocating assembly includes a reciprocating plate 302, a support column 303, and a reciprocating power element;
the reciprocating plate 302 is movably arranged on the second rotating plate 103, the moving direction of the reciprocating plate 302 is parallel to the rolling direction of the roller 301, the supporting column 303 is arranged on the reciprocating plate 302, and the roller 301 is rotatably arranged on the supporting column 303;
the reciprocating power element provides reciprocating power to the reciprocating plate 302.
When the rut test is needed, the reciprocating power element drives the reciprocating plate 302 to reciprocate, so that the roller 301 is driven to reciprocate on the test piece 201 to be tested, and the rut test is realized.
In this embodiment, referring to fig. 9, the reciprocating power elements are a motor 304, a turntable 305, a third link 306, a sleeve 307, and a sliding rod 308;
the motor 304 is fixedly arranged on the second rotating plate 103, the rotating disc 305 is fixedly arranged on a motor shaft, the axial direction of the rotating disc 305 is perpendicular to the moving direction of the reciprocating plate 302, one end of the third connecting rod 306 is hinged to the eccentric position of the rotating disc 305, the other end of the third connecting rod 306 is fixedly provided with a sleeve 307, the sleeve 307 is movably sleeved on a sliding rod 308, the sleeve 307 can slide and rotate on the sliding rod 308, the axial line of the sleeve 307 is parallel to the axial line of the rotating disc 305, the rotating axial line direction of the third connecting rod 306 is parallel to the axial line direction of the rotating disc 305, and the sliding rod 308 is fixedly arranged on the reciprocating plate 302.
When the reciprocating plate 302 is required to reciprocate, the motor 304 is started to drive the turntable 305 to rotate, so that the reciprocating plate 302 is driven to reciprocate by the third connecting rod 306.
In this embodiment, the reciprocating power element may also be an electric telescopic rod (this scheme is not shown), the electric telescopic rod is fixedly mounted on the second rotating plate 103, the telescopic direction of the electric telescopic rod is parallel to the moving direction of the reciprocating plate 302, and the telescopic end of the electric telescopic rod is fixedly connected to the reciprocating plate 302, and drives the reciprocating plate 302 to reciprocate through the telescopic action of the electric telescopic rod.
In this embodiment, referring to fig. 8 and 10, the pressure adjusting unit includes a lifting plate 401, a mounting plate 402, a pressure sensor 403, and a second lifting power element 404;
the support column 303 slides through the upper end surface and the lower end surface of the reciprocating plate 302, and the sliding direction of the support column 303 is perpendicular to the upper end surface of the test piece 201 to be tested;
the mounting plate 402 is located above the support column 303, the pressure sensor 403 is mounted between the mounting plate 402 and the support column 303, and the pressure sensor 403 is used for monitoring the pressure between the mounting plate 402 and the support column 303;
the lifting plate 401 is fixedly connected with the mounting plate 402, the second lifting power element 404 is fixedly arranged on the reciprocating plate 302, the telescopic end of the second lifting power element 404 is fixedly connected with the lifting plate 401, and the telescopic direction of the second lifting power element 404 is parallel to the sliding direction of the supporting column 303;
the second lifting power element 404 may be an electric telescopic rod or a hydraulic cylinder.
When a rutting test is required, starting a second lifting power element 404, driving a lifting plate 401 to descend, driving a roller 301 to move downwards through a supporting column 303, enabling the roller 301 to be attached to a test piece 201 to be tested, continuously starting the second lifting power element 404, applying pressure to the roller 301, and monitoring the pressure between the roller 301 and the test piece 201 to be tested in real time through a pressure sensor 403;
here, the initial pressure is set to x, and when the pressure is less than x during the experiment, the second lifting power element 404 starts the lifting plate 401 to descend until the pressure value is restored to x.
When the number of the rollers 301 is plural, each roller 301 is driven to lift by different second lifting power elements 404, so that the test conditions of the test pieces 201 to be tested in the same batch can be compared in real time by the expansion and contraction amounts of the expansion and contraction rods of the second lifting power elements 404.
In this embodiment, referring to fig. 3, 4, 8 and 9, the centrifugal force simulation unit includes two guiding modules, and the two guiding modules are respectively disposed at the left and right sides of the moving direction of the reciprocating plate 302;
the guiding module comprises a sliding rod 501, a rolling wheel 502, a limiting guiding block 503, a first through groove 504, a second through groove 505 and a guiding groove 506;
the sliding rod 501 is rotatably installed on the reciprocating plate 302, and the rotation axis direction of the sliding rod 501 is perpendicular to the rolling direction of the roller 301;
the rolling wheel 502 is slidably mounted on the sliding rod 501, and the sliding direction of the rolling wheel 502 is parallel to the upper end face of the test piece 201 to be tested;
the reciprocating plate 302 is located above the second rotating plate 103, the first through groove 504 is formed on the second rotating plate 103 and penetrates through the upper end surface and the lower end surface of the second rotating plate 103, and the width of the first through groove 504 is larger than the diameter of the supporting column 303;
the limiting guide block 503 is fixedly installed on the upper end surface of the second rotating plate 103, the second through groove 505 is formed in the limiting guide block 503 and penetrates through the front and rear side walls of the limiting guide block 503, the bottom end surface of the second through groove 505 is provided with a guide groove 506, the guide direction of the guide groove 506 is parallel to the rolling direction of the roller 301, and the rolling wheel 502 rolls along the guide direction of the guide groove 506;
the centrifugal force simulation unit further comprises a mounting frame 507 and a telescopic hydraulic cylinder 508;
the installation frame body 507 is positioned above the second rotating plate 103, the sliding rod 501 is positioned in the installation frame body 507, and the axis of the sliding rod 501 is vertical to the front side wall of the installation frame body 507;
the front side wall of the installation frame body 507 is attached to the end face of the sliding rod 501 of one guide module, and the rear side wall of the installation frame body 507 is attached to the end face of the sliding rod 501 of the other guide module;
two slide bars 501 are respectively installed at the left and right sides of the moving direction of the reciprocating plate 302, i.e., at the front side wall and the rear side wall of the reciprocating plate 302, respectively;
the telescopic hydraulic cylinder 508 is fixedly installed on the second rotating plate 103, the telescopic direction of the telescopic hydraulic cylinder 508 is perpendicular to the rolling direction of the roller 301, and the telescopic end of the telescopic hydraulic cylinder 508 is fixedly connected with the installation frame 507.
When the test piece 201 to be tested is in an inclined state and the roller 301 rolls for testing, centrifugal force needs to be applied to the roller 301 to better simulate the state of the wheel under the curve;
at this time, the telescopic hydraulic cylinder 508 is started, and a force perpendicular to the rolling direction of the roller 301 is applied to the roller 301 through the sliding rod 501 and the reciprocating plate 302, so that the roller 301 simulates centrifugal force in the rolling process;
meanwhile, the rolling wheel 502 arranged on the sliding rod 501 in a sliding way can ensure that the reciprocating plate 302 can normally reciprocate left and right.
In this embodiment, referring to fig. 4, the centrifugal force simulation unit further includes a ball guide groove 510 and a ball 509;
the front side inner wall and the rear side inner wall of the mounting frame 507 are provided with ball guide grooves 510, and the guide direction of the ball guide grooves 510 is parallel to the rolling direction of the roller 301;
the balls 509 are inserted into the end surfaces of the slide rod 501 in a rolling manner, and the balls 509 roll in the ball guide grooves 510.
When the reciprocating plate 302 reciprocates, the sliding rod 501 is driven to reciprocate along the rolling direction of the roller, and the rolling balls 509 reduce the friction between the sliding rod 501 and the mounting frame 507 during the movement.
In summary, according to the invention, the test piece to be tested is placed between the four compacting blocks 202 on the first rotating plate 102, the first lifting power element 209 is started to drive the compacting blocks 202 to lift to between the upper end face and the lower end face of the test piece 201 to be tested, the rotating power element 208 is started to drive the compacting blocks 202 to rotate, the first lifting power element 209 is started to drive the compacting blocks 202 to lift, the rotating power element 208 is started to drive the compacting blocks 202 to rotate to above the test piece 201 to be tested, the first lifting power element 209 is started to drive the compacting blocks 202 to move downwards so as to compact the test piece 201 to be tested, the linear power element 106 is started, the first rotating plate 102 is driven to rotate through the first connecting rod 105 so as to realize inclination simulation of a curved road surface, the second lifting power element 404 is started to drive the roller 301 to descend, so that the roller 301 is attached to the upper end face of the test piece 201 to be tested, the reciprocating power element is started to drive the reciprocating moving plate 302 to drive the roller 301 to reciprocate, and the telescopic hydraulic cylinder 508 is started so as to apply simulated curve to the roller 301, and thus real road surface simulation test is realized.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. An iron tailing sand asphalt concrete rut test device, characterized in that, the test device includes:
the test box body is provided with an opening for placing or taking out a test piece to be tested;
the first rotating plate is parallel to the second rotating plate, the first rotating plate is positioned below the second rotating plate, the first rotating plate and the second rotating plate are rotatably arranged in the test box, and the rotating axis of the first rotating plate is parallel to the rotating axis of the second rotating plate;
the clamping unit is arranged on the first rotating plate and used for limiting the position of the test piece to be tested;
the front-back moving unit comprises a reciprocating moving assembly and a roller, the roller is positioned between the first rotating plate and the second rotating plate, the roller is rotatably arranged on a roller mounting seat, the roller mounting seat is slidably arranged on the second rotating plate, and the roller rolls back and forth on the upper end surface of a test piece to be tested;
the rolling direction of the roller is parallel to the rotating axis direction of the first rotating plate, the sliding direction of the roller mounting seat is parallel to the rolling direction of the roller, and the reciprocating moving assembly provides reciprocating moving power for the roller mounting seat;
the pressure adjusting unit is arranged on the second rotating plate and is used for applying pressure to the roller, and the direction of the pressure applied by the pressure adjusting unit is vertical to the upper end face of the test piece to be tested;
and the centrifugal force simulation unit is used for applying centrifugal force to the roller, and the direction of the centrifugal force is perpendicular to the rolling direction of the roller.
2. The iron tailing sand asphalt concrete rut testing device according to claim 1, wherein: the test device further comprises a first rotating power unit for driving the first rotating plate to rotate, wherein the first rotating power unit comprises a sliding block, a first connecting rod and a linear power element;
the sliding block is slidably arranged in the test box body below the first rotating plate, and the sliding direction of the sliding block is perpendicular to the rotating axis direction of the first rotating plate;
the first connecting rod is hinged between the sliding block and the first rotating plate, and the rotating axis direction of the first connecting rod is parallel to the rotating axis direction of the first rotating plate;
the linear power element is fixed in the test box body and provides sliding power for the sliding block.
3. The iron tailing sand asphalt concrete rut testing device according to claim 1, wherein: the test device further comprises a second rotating power unit for driving the second rotating plate to rotate, and the second rotating power unit comprises a second connecting rod;
one end of the second connecting rod is hinged on the first rotating plate through a first hinge, the other end of the second connecting rod is hinged on the second rotating plate through a second hinge, and the rotating axis direction of the second connecting rod is parallel to the rotating axis direction of the second rotating plate;
the axis of the first hinge and the rotation axis of the first rotating plate are located on the same plane, the plane is a first plane, the axis of the second hinge and the rotation axis of the second rotating plate are located on the same plane, the plane is a second plane, and the first plane and the second plane are parallel;
the distance between the axis of the first hinge and the rotation axis of the first rotation plate is equal to the distance between the axis of the second hinge and the rotation axis of the second rotation plate.
4. The iron tailing sand asphalt concrete rut testing device according to claim 1, wherein: the clamping unit comprises four compression blocks, four rotating shafts, a through hole, four first gears, a second gear, a supporting plate, a rotating power element and a first lifting power element;
the cross section of the test piece to be tested is square, the four compacting blocks are respectively positioned at the front, back, left and right sides of the test piece to be tested, and the four compacting blocks are arranged in a circular equal-angle array along the center line of the test piece to be tested;
the support plate is positioned below the first rotating plate, a through hole penetrating through the upper end face and the lower end face of the first rotating plate is formed in the first rotating plate, one end of the rotating shaft is rotatably installed on the support plate, the other end of the rotating shaft penetrates through the through hole to be fixedly connected with the compression block, and the axial direction of the rotating shaft is perpendicular to the upper end face of the test piece to be tested;
the four first gears are respectively fixed on the rotating shaft, the second gears are rotatably arranged on the supporting plate, the first gears are meshed with the second gears, and the rotating power element provides rotating power for the second gears;
the diameter of the through hole is larger than or equal to that of the rotating shaft;
the first lifting power element is fixedly arranged on the lower end face of the first rotating plate, the telescopic end of the first lifting power element is fixedly connected with the supporting plate, and the telescopic direction of the first lifting power element is parallel to the axial direction of the rotating shaft;
the connecting line of the middle point of the upper boundary and the middle point of the lower boundary of the side end surface of the test piece to be tested is a first straight line, the distance between the axis of the rotating shaft and the first straight line is n, and the length of the compaction block is m, wherein m=n;
the distance between the axis of the rotating shaft and the test piece to be tested is smaller than the length of the compression block.
5. The iron tailing sand asphalt concrete rut testing device according to claim 4, wherein: the clamping units are arranged on the first rotating plate, and the clamping units are limited with test pieces to be tested;
the number of the rollers is also multiple, and the multiple rollers roll on the upper end faces of the multiple test pieces to be tested respectively.
6. The iron tailing sand asphalt concrete rut testing device according to claim 1, wherein: the reciprocating assembly comprises a reciprocating plate, a support column and a reciprocating power element;
the reciprocating plate is movably arranged on the second rotating plate, the moving direction of the reciprocating plate is parallel to the rolling direction of the roller, the support column is arranged on the reciprocating plate, and the roller is rotatably arranged on the support column;
the reciprocating power element provides reciprocating power for the reciprocating plate.
7. The iron tailing sand asphalt concrete rut testing device according to claim 6, wherein: the reciprocating power element is composed of a motor, a turntable, a third connecting rod, a sleeve and a sliding rod;
the motor is fixedly arranged on the second rotating plate, the rotating disc is fixedly arranged on the motor shaft, the axial direction of the rotating disc is perpendicular to the moving direction of the reciprocating plate, one end of the third connecting rod is hinged to the eccentric position of the rotating disc, the other end of the third connecting rod is fixedly provided with a sleeve, the sleeve is movably sleeved on the sliding rod, the sleeve can slide and rotate on the sliding rod, the axial line of the sleeve is parallel to the axial line of the rotating disc, the axial line direction of the rotation of the third connecting rod is parallel to the axial line direction of the rotating disc, and the sliding rod is fixedly arranged on the reciprocating plate.
8. The iron tailing sand asphalt concrete rut testing device according to claim 6, wherein: the pressure adjusting unit comprises a lifting plate, a mounting plate, a pressure sensor and a second lifting power element;
the support column slides and penetrates through the upper end face and the lower end face of the reciprocating moving plate, and the sliding direction of the support column is perpendicular to the upper end face of the test piece to be tested;
the mounting plate is positioned above the support column, the pressure sensor is arranged between the mounting plate and the support column, and the pressure sensor is used for monitoring the pressure between the mounting plate and the support column;
the lifting plate is fixedly connected with the mounting plate, the second lifting power element is fixedly mounted on the reciprocating plate, the telescopic end of the second lifting power element is fixedly connected with the lifting plate, and the telescopic direction of the second lifting power element is parallel to the sliding direction of the support column.
9. The iron tailing sand asphalt concrete rut testing device according to claim 6, wherein: the centrifugal force simulation unit comprises two guide modules which are respectively arranged at the left side and the right side of the moving direction of the reciprocating moving plate;
the guide module comprises a sliding rod, a rolling wheel, a limiting guide block, a first through groove, a second through groove and a guide groove;
the sliding rod is rotatably arranged on the reciprocating moving plate, and the rotating axis direction of the sliding rod is perpendicular to the rolling direction of the roller;
the rolling wheel is arranged on the sliding rod in a sliding manner, and the sliding direction of the rolling wheel is parallel to the upper end face of the test piece to be tested;
the reciprocating plate is positioned above the second rotating plate, the first through groove is formed in the second rotating plate and penetrates through the upper end face and the lower end face of the second rotating plate, and the width of the first through groove is larger than the diameter of the supporting column;
the limiting guide block is fixedly arranged on the upper end face of the second rotating plate, the second through groove is formed in the limiting guide block and penetrates through the front side wall and the rear side wall of the limiting guide block, the guide groove is formed in the bottom end face of the second through groove, the guide direction of the guide groove is parallel to the rolling direction of the roller, and the rolling wheel rolls along the guide direction of the guide groove;
the centrifugal force simulation unit also comprises a mounting frame body and a telescopic hydraulic cylinder;
the mounting frame body is positioned above the second rotating plate, the sliding rod is positioned in the mounting frame body, and the axis of the sliding rod is vertical to the front side wall of the mounting frame body;
the front side wall of the installation frame body is attached to the end face of the sliding rod of one guide module, and the rear side wall of the installation frame body is attached to the end face of the sliding rod of the other guide module;
the telescopic hydraulic cylinder is fixedly arranged on the second rotating plate, the telescopic direction of the telescopic hydraulic cylinder is perpendicular to the rolling direction of the roller, and the telescopic end of the telescopic hydraulic cylinder is fixedly connected with the mounting frame body.
10. The iron tailing sand asphalt concrete rut testing device according to claim 9, wherein: the centrifugal force simulation unit also comprises a ball guide groove and balls;
the front side inner wall and the rear side inner wall of the mounting frame body are respectively provided with a ball guide groove, and the guide direction of the ball guide grooves is parallel to the rolling direction of the rollers;
the ball rolls and inlays the terminal surface of establishing at the slide bar, the ball rolls in the ball guide way.
CN202310504932.9A 2023-05-08 2023-05-08 Iron tailing sand asphalt concrete rutting test device Active CN116296929B (en)

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