A fine aggregate bulk density testing device

Abstract

This utility model relates to the field of bulk density testing, and particularly to a device for testing the bulk density of fine aggregates. It includes a base and a swing assembly and a swing mechanism mounted on the base. The swing assembly includes a swing roller, a swing tray, and a swing arm respectively disposed on the outer wall of the swing roller. The swing roller and the bottom wall of the swing tray are fixedly connected. The axis of the swing roller and the center of the bottom wall of the swing tray are on the same plane, and this plane is perpendicular to the plane containing the bottom wall of the swing tray. The swing roller and the base are rotatably connected. The swing mechanism and the swing arm are connected to drive the swing roller to rotate. Using this utility model improves the accuracy of test data and increases test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bulk density testing, and in particular to a device for testing the bulk density of fine aggregates. Background Technology

[0002] The current Chinese industry standard, *Specifications for Testing Aggregates in Highway Engineering* (JTG E42-2005), mentions vibration-island testing in the tests for bulk density and compacted density of fine aggregates. This includes: filling a sand sample into a funnel, opening the bottom valve to allow the sand to flow into a measuring cylinder. After filling the funnel, use a ruler to level any excess sand along the center line of the cylinder opening in two opposite directions. Take another sand sample and fill it into the measuring cylinder in two layers. After each layer is filled, place a 10mm diameter steel bar at the bottom of the cylinder and alternately vibrate it against the ground 25 times each (note that the steel bars should be placed perpendicular to each other in both layers).

[0003] The current test method uses a 10mm diameter steel bar and a measuring cylinder. After filling the measuring cylinder with sand sample, it is placed on the steel bar and the ground is vibrated alternately from side to side to compact the sand sample. After filling the second layer of sand sample, the steel bar or measuring cylinder is rotated 90 degrees, and the vibration operation is repeated. This test structure has the following problems: the position between the steel bar and the measuring cylinder is not relatively fixed. During vibration, the steel bar is prone to displacement, making it difficult to ensure that the steel bar is in the center of the measuring cylinder. When the ground is vibrated alternately from side to side, the force on the two sides of the measuring cylinder is different, affecting the accuracy of the test data and reducing the efficiency of the test. In addition, the rotation angle of the steel bar or measuring cylinder is inaccurate, making it difficult to ensure a 90-degree rotation, which also leads to inaccurate test data and reduces the efficiency of the test. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a fine aggregate bulk density testing device to improve the accuracy of test data and improve the efficiency of test detection.

[0005] To solve the above-mentioned technical problems, this utility model provides a fine aggregate bulk density testing device, including a base and a swing assembly and a swing mechanism installed on the base;

[0006] The swing assembly includes a swing roller, a swing tray and a swing arm respectively disposed on the outer side wall of the swing roller, and the bottom wall of the swing roller and the swing tray are fixedly connected; the axis of the swing roller and the center of the bottom wall of the swing tray are on the same plane, and the plane is perpendicular to the plane of the bottom wall of the swing tray.

[0007] The sway roller and the base are rotatably connected; the sway mechanism and the sway arm are connected to drive the sway roller to rotate.

[0008] As an improvement to the above solution, the base includes a test bench and a support mounted on the test bench, the swing roller is mounted on the support and is rotatably connected to the support; the swing mechanism is mounted on the test bench.

[0009] As an improvement to the above solution, the test bench is provided with a through hole, the swing roller is located above the through hole, and the swing arm is inserted into the through hole; the swing mechanism is located at the bottom of the test bench and is connected to the swing arm through the through hole.

[0010] As an improvement to the above solution, the swing mechanism includes a drive mechanism and a transmission assembly. The drive mechanism is fixedly connected to the test bench, and the drive mechanism is connected to the swing arm through the transmission assembly.

[0011] The transmission assembly includes a rocker seat, which is rotatably connected to the test bench. One end of the rocker seat is connected to a drive mechanism, and the other end is connected to a rocker arm. The drive mechanism drives the rocker seat to rotate back and forth, so that the rocker arm swings back and forth.

[0012] As an improvement to the above solution, the transmission assembly further includes an output rod and a connecting rod, and the drive mechanism, output rod, connecting rod and rocker seat are connected in sequence.

[0013] As an improvement to the above solution, the rocking seat includes a fixed rod, a rotating shaft, and a rocking component. The fixed rod is fixedly connected to the test bench, the rotating shaft is mounted on the fixed rod, and the rocking component is rotatably connected to the rotating shaft. One end of the rocking component is movably connected to the drive mechanism, and the other end is provided with a toggle block. The toggle block is movably connected to the rocking arm.

[0014] As an improvement to the above solution, a rotary drive mechanism is also included. The rotary drive mechanism includes a rotating seat and a positioning component disposed on the rotating seat. The rotating seat is sleeved outside the test bench and can rotate around the test bench. The positioning component is used to limit the rotation angle of the rotating seat.

[0015] As an improvement to the above solution, the positioning component includes a limiting block disposed on the side wall of the base and a positioning block disposed on the side wall of the rotating seat. The number of positioning blocks is at least two. The limiting block is disposed between two adjacent positioning blocks, and the limiting block can abut against the positioning block respectively.

[0016] As an improvement to the above solution, a test container placed on a swing tray is also included;

[0017] The rotary drive mechanism also includes a lifting mechanism mounted on the rotating base, which is used to separate the test container and the swing tray.

[0018] As an improvement to the above solution, the lifting mechanism is provided with a lifting block, and the outer wall of the test container is provided with a handle; the lifting mechanism drives the handle to rise through the lifting block, so as to separate the test container and the swing tray.

[0019] Implementing this utility model has the following beneficial effects:

[0020] This utility model relates to a fine aggregate bulk density testing device, which includes a swing assembly and a swing mechanism. The swing assembly comprises a swing roller, a swing tray, and a swing arm, each mounted on the outer wall of the swing roller. The swing roller and the bottom wall of the swing tray are fixedly connected; the axis of the swing roller and the center of the bottom wall of the swing tray are on the same plane, and this plane is perpendicular to the plane containing the bottom wall of the swing tray. Specifically, the swing roller is positioned at the radially upper-middle position of the swing tray, ensuring that the volumes of the swing trays on both sides of the swing roller are equal. This guarantees that the relative positions of the swing roller and the swing tray remain fixed and do not shift during the test, ensuring equal and balanced forces on both sides of the swing tray, thereby ensuring the accuracy of the test data and improving the efficiency of the test. Furthermore, this utility model, through the cooperation of the swing mechanism and the swing arm, drives the swing roller to rotate at a certain angle, ensuring that the swing tray swings back and forth within a certain angle range, thus ensuring force balance on both sides of the swing tray, further guaranteeing the accuracy of the test data, improving the efficiency of the test, and reducing the labor intensity of the test personnel. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the fine aggregate bulk density testing device of this utility model;

[0022] Figure 2 yes Figure 1 A structural diagram from another angle;

[0023] Figure 3 yes Figure 2 Enlarged view of point A;

[0024] Figure 4 yes Figure 3 A structural diagram from another angle;

[0025] Figure 5 This is a reference diagram showing the usage status of the fine aggregate bulk density testing device of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0027] See Figure 1-5 This utility model discloses a fine aggregate bulk density testing device, including a base 1 and a swing assembly and a swing mechanism installed on the base 1.

[0028] The swing assembly includes a swing roller 2 and a swing tray 3 and a swing arm 4 respectively disposed on the outer side wall of the swing roller 2. The bottom wall of the swing roller 2 and the swing tray 3 are fixedly connected. The axis of the swing roller 2 and the center of the bottom wall of the swing tray 3 are on the same plane, and the plane is perpendicular to the plane of the bottom wall of the swing tray 3.

[0029] The swing roller 2 and the base 1 are rotatably connected; the swing mechanism and the swing arm 4 are connected to drive the swing roller 2 to rotate.

[0030] This utility model relates to a fine aggregate bulk density testing device, which includes a swing assembly and a swing mechanism. The swing assembly comprises a swing roller, a swing tray, and a swing arm, each mounted on the outer wall of the swing roller. The swing roller and the bottom wall of the swing tray are fixedly connected; the axis of the swing roller and the center of the bottom wall of the swing tray are on the same plane, and this plane is perpendicular to the plane containing the bottom wall of the swing tray. Specifically, the swing roller is positioned at the radially upper-middle position of the swing tray, ensuring that the volumes of the swing trays on both sides of the swing roller are equal. This guarantees that the relative positions of the swing roller and the swing tray remain fixed and do not shift during the test, ensuring equal and balanced forces on both sides of the swing tray, thereby ensuring the accuracy of the test data and improving the efficiency of the test. Furthermore, this utility model, through the cooperation of the swing mechanism and the swing arm, drives the swing roller to rotate at a certain angle, ensuring that the swing tray swings back and forth within a certain angle range, thus ensuring force balance on both sides of the swing tray, further guaranteeing the accuracy of the test data, improving the efficiency of the test, and reducing the labor intensity of the test personnel.

[0031] Specifically, as shown in the figure, the base 1 includes a test bench 11 and a support 12 mounted on the test bench 11. The swing roller 2 is mounted on the support 12 and rotatably connected to the support 12. The swing mechanism is installed on the test bench 11. The support supports the swing roller while ensuring that the swing roller can rotate freely. The swing mechanism is installed on the test bench and drives the swing roller to rotate back and forth through the swing arm, causing the swing tray to swing left and right, so that the left and right sides of the swing tray alternately bounce against the test bench.

[0032] Preferably, as shown in the figure, the test bench 11 has a through hole 13, the swing roller 2 is located above the through hole 13, and the swing arm 4 is inserted into the through hole 13; the swing mechanism is located at the bottom of the test bench 11 and is connected to the swing arm 4 through the through hole 13. The swing roller and the swing tray are located above the test bench, and the swing mechanism is located at the bottom of the test bench. The swing mechanism is connected to the swing arm through the through hole, thereby driving the swing roller to rotate. This structure is simple, compact, and space-saving, ensuring that both sides of the swing tray can bounce against the test bench.

[0033] Preferably, as shown in the figure, the swing mechanism includes a drive mechanism 5 and a transmission assembly. The drive mechanism 5 is fixedly connected to the test bench 11, and the drive mechanism 5 is connected to the swing arm 4 through the transmission assembly. The transmission assembly includes a swing seat 8, which is rotatably connected to the test bench 11. One end of the swing seat 8 is connected to the drive mechanism 5, and the other end is connected to the swing arm 4. The drive mechanism 5 drives the swing seat 8 to rotate back and forth, causing the swing arm 4 to swing back and forth. The swing seat is installed at the bottom of the test bench and is rotatably connected to it. That is, the swing seat can rotate, and the drive mechanism drives the swing seat to rotate, causing the swing arm to swing back and forth, thereby causing the swing roller to rotate back and forth, so that the left and right sides of the swing tray alternately bounce against the test bench. The drive mechanism is preferably a motor.

[0034] More preferably, as shown in the figure, the rocker seat 8 includes a fixed rod 81, a rotating shaft 82, and a rocker component 83. The fixed rod 81 is fixedly connected to the test bench 11, the rotating shaft 82 is mounted on the fixed rod 81, and the rocker component 83 is rotatably connected to the rotating shaft 82. One end of the rocker component 83 is movably connected to the drive mechanism 5, and the other end is provided with a toggle block 84. The toggle block 81 is movably connected to the rocker arm 4.

[0035] The swaying component can rotate around its axis. When the drive mechanism drives one end of the swaying component to swing left and right, it also causes the other end of the swaying component to swing left and right. The swaying component is movably connected to the swaying arm via a toggle block. That is, the swaying component moves the swaying arm via the toggle block, causing the swaying arm to swing left and right, thereby causing the swaying roller to rotate back and forth, realizing the alternating impact of the left and right sides of the swaying tray on the test bench.

[0036] More preferably, as shown in the figure, the transmission assembly further includes an output rod 6 and a connecting rod 7, with the drive mechanism 5, output rod 6, connecting rod 7, and rocker seat 8 connected in sequence. Specifically, one end of the output rod 6 is fixedly connected to the drive mechanism 5, and the other end is hinged to the connecting rod 7; one end of the connecting rod 7 is hinged to the output rod 6, and the other end is hinged to the rocker component 83. Therefore, the drive mechanism drives the output rod to rotate around one end of the output rod, causing the connecting rod to reciprocate, thereby causing the rocker component to rock back and forth, realizing the back-and-forth rotation of the rocker roller. Its structure is simple and compact, and the drive is reliable.

[0037] Furthermore, as shown in the figure, this utility model also includes a rotary drive mechanism, which includes a rotating seat 9 and a positioning component disposed on the rotating seat 9. The rotating seat 9 is sleeved outside the test bench 11 and can rotate around the test bench 11. The positioning component is used to limit the rotation angle of the rotating seat 9. This utility model also includes a test container 20 placed on a swing tray 3. Specifically, the rotating seat 9 is annular, sleeved outside the test bench and can rotate around the test bench. During the test, the test container carrying the test sample, such as sand, is placed on the swing tray and bounces on the test bench from left to right with the swing tray. After the first test is completed, the test container can rotate with the rotating seat and be placed back on the swing tray for the second test. This utility model uses the positioning component to limit the rotation angle of the rotating seat to ensure the accuracy of the rotation angle.

[0038] Preferably, as shown in the figure, the positioning assembly includes a limiting block 14 disposed on the side wall of the base 1 and a positioning block 15 disposed on the side wall of the rotating seat 9. The number of positioning blocks 15 is at least two, and the limiting block 14 is disposed between two adjacent positioning blocks 15, and the limiting block 14 can abut against each positioning block 15. When the rotating seat rotates, the limiting block abuts against the positioning block, thereby limiting the rotation angle of the rotating seat. Specifically, the angle between the line connecting the center of the two positioning blocks 15 and the center of the rotating seat 9 is 90 degrees. According to the "Specifications for Testing Aggregates in Highway Engineering" (JTG E42-2005), the steel reinforcement arrangement for the two tests should be perpendicular to each other, meaning that the placement of the swing rollers at the bottom of the test container in the two tests should be perpendicular to each other. Therefore, the rotating seat only needs to rotate the test container 90 degrees. That is, during the first test, the limiting block abuts against one positioning block, and then the rotating seat rotates the test container, causing the limiting block to abut against the other positioning block, and then the second test is performed to meet the test requirements.

[0039] This invention uses a rotating base and a positioning component together to improve the accuracy of the rotation angle, thereby improving the accuracy of test data and increasing test efficiency.

[0040] Preferably, as shown in the figure, the rotary drive mechanism further includes a lifting mechanism 10 disposed on the rotating base 9. The lifting mechanism 10 is used to separate the test container 20 and the swing tray 3. The lifting mechanism 10 is preferably a hydraulic lifting rod. There are two lifting mechanisms 10, which are disposed on opposite sides of the rotating base 9. The lifting mechanism drives the test container to rise, separating the test container from the swing tray. At this time, the rotating base rotates, allowing the test container to rotate with the rotating base. Then, the lifting mechanism descends, and the test container descends accordingly, allowing the test container to be placed back on the swing tray for the next test.

[0041] More preferably, as shown in the figure, the lifting mechanism 10 is provided with a lifting block 101, and the outer wall of the test container 20 is provided with a handle 201; the lifting mechanism 10 drives the handle 201 to rise through the lifting block 101, so as to separate the test container 20 from the swing tray 3. Specifically, the top of the lifting mechanism is provided with a lifting block, which is located below the handle. When the lifting mechanism rises, the lifting block lifts the handle, thereby lifting the test container and separating the test container from the swing tray. Subsequently, the rotating seat rotates, which drives the test container to rotate. Its structure is simple and reliable, improves the accuracy of test data, improves test detection efficiency, and also reduces the labor intensity of test personnel.

[0042] In summary, this utility model provides a fine aggregate bulk density testing device, which improves the accuracy of test data and increases test efficiency.

[0043] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A device for testing the bulk density of fine aggregates, characterized in that, Includes a base and a rocking assembly and rocking mechanism mounted on the base; The swing assembly includes a swing roller, a swing tray and a swing arm respectively disposed on the outer side wall of the swing roller, and the bottom wall of the swing roller and the swing tray are fixedly connected; the axis of the swing roller and the center of the bottom wall of the swing tray are on the same plane, and the plane is perpendicular to the plane of the bottom wall of the swing tray. The sway roller and the base are rotatably connected; the sway mechanism and the sway arm are connected to drive the sway roller to rotate.

2. The fine aggregate bulk density testing device as described in claim 1, characterized in that, The base includes a test bench and a support mounted on the test bench. The swing roller is mounted on the support and is rotatably connected to the support. The swing mechanism is installed on the test bench.

3. The fine aggregate bulk density testing device as described in claim 2, characterized in that, The test bench is provided with a through hole, the swing roller is located above the through hole, and the swing arm is inserted into the through hole; the swing mechanism is located at the bottom of the test bench and is connected to the swing arm through the through hole.

4. The fine aggregate bulk density testing device as described in claim 1, characterized in that, The swing mechanism includes a drive mechanism and a transmission assembly. The drive mechanism is fixedly connected to the test bench, and the drive mechanism is connected to the swing arm through the transmission assembly. The transmission assembly includes a rocker seat, which is rotatably connected to the test bench. One end of the rocker seat is connected to a drive mechanism, and the other end is connected to a rocker arm. The drive mechanism drives the rocker seat to rotate back and forth, so that the rocker arm swings back and forth.

5. The fine aggregate bulk density testing device as described in claim 4, characterized in that, The transmission assembly also includes an output rod and a connecting rod, and the drive mechanism, output rod, connecting rod and rocker seat are connected in sequence.

6. The fine aggregate bulk density testing device as described in claim 4, characterized in that, The rocking seat includes a fixed rod, a rotating shaft, and a rocking component. The fixed rod is fixedly connected to the test bench, the rotating shaft is mounted on the fixed rod, and the rocking component is rotatably connected to the rotating shaft. One end of the rocking component is movably connected to the drive mechanism, and the other end is provided with a toggle block. The toggle block is movably connected to the rocking arm.

7. The fine aggregate bulk density testing apparatus according to any one of claims 1-6, characterized in that, It also includes a rotary drive mechanism, which includes a rotating seat and a positioning component disposed on the rotating seat. The rotating seat is sleeved outside the test bench and can rotate around the test bench. The positioning component is used to limit the rotation angle of the rotating seat.

8. The fine aggregate bulk density testing device as described in claim 7, characterized in that, The positioning component includes a limiting block disposed on the side wall of the base and a positioning block disposed on the side wall of the rotating seat. The number of positioning blocks is at least two. The limiting block is disposed between two adjacent positioning blocks and can abut against the positioning blocks respectively.

9. The fine aggregate bulk density testing device as described in claim 7, characterized in that, It also includes test containers placed on a swing tray; The rotary drive mechanism also includes a lifting mechanism mounted on the rotating base, which is used to separate the test container and the swing tray.

10. The fine aggregate bulk density testing device as described in claim 9, characterized in that, The lifting mechanism is equipped with a lifting block, and the outer wall of the test container is equipped with a handle; the lifting mechanism drives the handle to rise through the lifting block, so as to separate the test container and the swing tray.

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