CN217006732U

CN217006732U - Convenient operation's coarse aggregate crushing value apparatus

Info

Publication number: CN217006732U
Application number: CN202220471316.9U
Authority: CN
Inventors: 冯明珠; 肖璇; 黄炫晟; 李平; 黄松; 杨新航; 潘飞利; 覃丽梅; 谢路璐
Original assignee: Changsha University of Science and Technology; Guangxi Jiaoke Group Co Ltd
Current assignee: Changsha University of Science and Technology; Guangxi Jiaoke Group Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-19
Anticipated expiration: 2032-03-04

Abstract

The utility model provides a coarse aggregate crushing value tester convenient to operate, which comprises a base and a compression leg, wherein the compression leg comprises an upper sleeve and a lower sleeve which are coaxially and detachably connected, and the bottom of the lower sleeve is arranged in a positioning groove formed in the top of the base; the lower sleeve is of a left-right detachable structure, and the pushing mechanism is arranged outside the positioning groove and applies inward splicing thrust to the left part and the right part of the lower sleeve; the compression leg is vertically arranged on the axis of the lower sleeve in a lifting manner, and the bottom compression face of the compression leg is matched with the inner diameter of the lower sleeve. The coarse aggregate crushing value tester provided by the utility model is convenient to operate, can quickly determine the use amount of coarse aggregates and ensure that the coarse aggregates are flatly pressed, can quickly demould a test piece after being extruded for testing, can effectively simplify the test operation of the coarse aggregate crushing value, and improves the test accuracy.

Description

Convenient operation's coarse aggregate crushing value apparatus

Technical Field

The utility model relates to the technical field of asphalt coarse aggregate testing equipment, in particular to a coarse aggregate crushing value tester.

Background

China is vast in breadth and large in population, and the road network extends over the five lakes and four seas, which forms a link for trade development in various places. With the development of road construction, the road planning targets of capital radiation province meeting, inter-provincial multi-path communication, local city high-speed access and county national road coverage are gradually realized. The asphalt pavement has the excellent characteristics of comfortable driving, low noise, short construction period, simple and convenient maintenance and the like, and becomes the most common pavement form of the pavement in China.

The coarse aggregate is a main raw material in road engineering, particularly has huge use amount in road engineering, the content in the asphalt mixture reaches 90 percent, and the coarse aggregate is a main bearing body of a road surface structure. The quality of the coarse aggregate directly determines the service performance of the road, and the crushing index value of the coarse aggregate is an important index for detecting the compressive strength of the coarse aggregate.

In actual construction, under the load action of a vibratory roller, the coarse aggregate is often crushed, and particularly, the needle-shaped particles and the weak particles are easily crushed. After being crushed, the coarse aggregate directly influences the pavement performance of the mixture, and reduces the durability, water resistance and fatigue resistance of the mixture. After the coarse aggregate of the asphalt mixture is crushed, a new fracture surface appears, the fracture surface is easy to absorb moisture, and after the moisture enters the inside of the coarse aggregate, an asphalt oil film is peeled off from the surface of the coarse aggregate, so that the early damage of the asphalt concrete pavement is caused. The crushing of the coarse aggregates can also refine the gradation of the mixture and destroy the embedding and extrusion among the aggregates, thereby reducing the service function and the service life of the pavement.

In the existing measuring method, a measuring cylinder is commonly used to determine the required material quality, and then the material quality is transferred to a test cylinder, so that the measuring method is complex to operate and has certain material loss errors. The existing coarse aggregate crushing value detection equipment cannot guarantee that a test piece is placed flatly, and the extrusion is uneven and the detection effect is influenced because coarse aggregates cannot be placed flatly in the detection equipment. Meanwhile, by adopting the existing coarse aggregate crushing value detection equipment, a sample is not easy to demould after being extruded, secondary extrusion is easy to cause on a test piece, and the subsequent measurement and test precision is reduced.

Based on the defects, the coarse aggregate crushing value tester capable of quickly determining the usage amount of the coarse aggregates, guaranteeing the leveling and pressing of the coarse aggregates and quickly demolding after the extrusion of test pieces is designed, can simplify the operation of the coarse aggregate crushing value test, and improves the measurement precision.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coarse aggregate crushing value tester convenient to operate, which can quickly determine the using amount of coarse aggregates and ensure that the coarse aggregates are flatly pressed, and a test piece can be quickly demoulded for testing after being extruded. The tester can effectively simplify the operation of testing the crushing value of the coarse aggregate and improve the testing accuracy.

In order to achieve the technical purpose and achieve the technical effects, the utility model solves the problems through the following technical scheme:

a convenient-to-operate coarse aggregate crushing value tester comprises a base and a compression column, and comprises an upper sleeve and a lower sleeve which are coaxially and detachably connected, wherein the bottom of the lower sleeve is arranged in a positioning groove formed in the top of the base; the lower sleeve is of a left-right detachable structure, and the pushing mechanism is arranged outside the positioning groove and applies inward splicing thrust to the left part and the right part of the lower sleeve; the compression leg is vertically arranged on the axis of the lower sleeve in a lifting manner, and the bottom compression face of the compression leg is matched with the inner diameter of the lower sleeve.

In the above-mentioned scheme, detachable construction about the material sleeve adopts, goes up the sleeve and leads spacingly to the compression leg, and the quick ration is realized to the material to the lower sleeve, and the coarse aggregate that awaits measuring is arranged in the lower sleeve, and the sleeve volume is invariable. The lower sleeve adopts a detachable splicing structure, so that the material demoulding measurement after the crushing experiment is convenient; the supporting and pushing mechanism is used for limiting the two sides of the sleeve, and the stability of the sleeve in a crushing experiment is guaranteed.

Furthermore, the outer edge of the base is provided with an annular baffle, and the pushing mechanisms are symmetrically arranged on two sides of the annular baffle in pairs. The base can be used as a cylindrical container by arranging the annular baffle, and the crushed coarse aggregate can be directly taken out and stacked on the base and directly transferred into the sieve from the base. The structure simplifies the material transfer operation, avoids the loss of materials in the material transfer process and improves the experiment precision.

Furthermore, the pushing mechanism comprises a screw rod in threaded connection with the annular baffle, a pushing block arranged at the front end of the screw rod and abutted against the outer wall of the sleeve, and a rocker arranged at the tail end of the screw rod.

Furthermore, the upper sleeve is also of a left-right detachable structure, the pushing mechanisms are divided into an upper group and a lower group, and the pushing mechanism on the upper portion applies inward splicing pushing force to the upper sleeve.

Furthermore, the upper sleeve and the lower sleeve are detachably connected through a lock catch.

The utility model has the advantages and effects that:

1. the coarse aggregate crushing value tester disclosed by the utility model adopts an upper and lower combined sleeve structure, the upper sleeve guides and limits the compression column, and aggregate splashing and loss in the crushing experiment process are prevented. The volume of the lower sleeve is matched with the using amount of the coarse aggregate for the test, and the quantitative filling of the aggregate can be quickly realized. When the aggregate is filled, the aggregate is led into the lower sleeve in three layers, then the metal rod is used for tamping, and the surface is strickled off, thus completing the aggregate filling. The method can reduce the step of measuring the aggregate by using the measuring cylinder and improve the test efficiency.

2. The lower sleeve adopts a left-right splicing structure, and is provided with a pushing mechanism for pushing and limiting two sides of the sleeve. After the press machine is compacted, the abutting and pushing mechanism is loosened, the lower sleeve is separated into two parts, the material can be quickly demoulded, and the situation that the test precision is influenced by re-extruding the test material during demoulding is avoided.

3. The upper sleeve and the lower sleeve are connected through the lock catch, and the left half cylinder and the right half cylinder of the upper sleeve and the lower sleeve are tightly spliced under the action of the abutting and pushing mechanism, so that the upper sleeve and the lower sleeve can form a complete and stable cylinder under the extrusion action.

4. The outer edge of the base is provided with an annular baffle plate which provides a mounting base for the pushing mechanism and enables the base to form a barrel-shaped structure. The material taken out of the lower sleeve can be directly stacked on the base and transferred from the base to the screen for screening. By adopting the structure, the moving times of the base, the test cylinder and the test material can be reduced, and the test precision is prevented from being influenced by the loss of the test material in the moving process.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention.

And (3) identifying the figure number: 1. the device comprises a base, 11, a positioning groove, 2, a compression column, 3, an upper sleeve, 4, a lower sleeve, 5, a pushing mechanism, 51, a screw rod, 52, a pushing block, 53, a rocker, 6, an annular baffle, 7 and a lock catch.

Detailed Description

The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. The specific embodiments described herein are merely illustrative of the utility model and are not intended to be limiting.

The coarse aggregate crushing value tester convenient to operate in the embodiment is shown in the attached drawings 1 and 2, and the main body of the tester comprises a base 1, a compression column 2, an upper sleeve 3, a lower sleeve 4, a pushing mechanism 5, an annular baffle 6 and a lock catch 7. The bottom of the lower sleeve 4 is arranged in a circular positioning groove 11 arranged in the middle of the base 1. The upper sleeve 3 is coaxially stacked on the upper part of the lower sleeve 4 and is detachably connected with the lower sleeve 4 through a lock catch 7 to form a complete material pressing sleeve. The compression column 2 is vertically arranged on the axis of the material pressing sleeve in a lifting way, and the pressing surface at the bottom of the compression column 2 is matched with the inner diameter of the material pressing sleeve.

The upper sleeve 3 and the lower sleeve 4 are both of a left-right half-sleeve splicing structure, the outer edge of the base 1 is provided with an annular baffle 6, and the annular baffle 6 and the base 1 form a barrel-shaped structure. The pushing mechanisms 5 are symmetrically arranged on the annular baffles 6 on the left side and the right side in pairs, and respectively act on the left half cylinder and the right half cylinder to apply pushing force for inwards splicing the left half cylinder and the right half cylinder. In the embodiment, an upper group of pushing mechanisms 5 and a lower group of pushing mechanisms 5 are arranged to respectively act on the upper sleeve 3 and the lower sleeve 4, so that the upper sleeve 3 and the lower sleeve 4 are spliced to form a complete and stable material pressing sleeve.

The pushing mechanism 5 comprises a screw 51 in threaded connection with the annular baffle 6, a pushing block 52 and a rocker 53, the pushing block 52 is arranged at the front end of the screw 51 and is abutted against the outer wall of the semi-cylinder, and the rocker 53 is arranged at the tail end of the screw 51 to drive the screw 51 to rotate. The screw 51 rotates to drive the abutting block 52 to move and abut against the outer wall of the half cylinder, and radial acting force for inwards splicing the left half cylinder and the right half cylinder is applied.

The procedure of using the coarse aggregate crush value tester described in this example was:

1. splicing the left half barrel and the right half barrel of the lower sleeve 4 into a positioning groove 11 of the base 1, and adjusting a pushing mechanism 5 positioned at the lower part to ensure that the lower sleeve 4 is stably spliced and positioned;

2. the samples were evenly loaded into the lower sleeve 4 in three times, and the surface of the sample was flattened each time. Then uniformly tamping the semi-spherical end of the metal rod on the surface of the aggregate for 25 times, and finally, carefully leveling the surface by using the metal rod as a straight scraper;

3. the upper sleeve 3 is coaxially arranged above the lower sleeve 4, the upper sleeve 3 and the lower sleeve 4 are fastened by a lock catch 7, and the upper sleeve 3 is stably spliced and positioned by adjusting the pushing mechanism 5 positioned above;

4. starting a press machine to enable the compression leg 2 to work, enabling the compression leg 2 to descend into the upper sleeve 3, applying pressure to aggregate in the lower sleeve 4, and removing the compression leg 2 after pressurization is completed;

5. the screw 51 is turned to remove the stopper 52, and the lock 7 is opened to remove the upper sleeve 3. Then, the left side and the right side of the lower sleeve 2 are separated, so that the sample falls off from the lower sleeve 2, the sample is transferred from the base 1 to the sieve, and the crushing value can be obtained by calculating by adopting the obtained mass of the sieved aggregate.

The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Many changes, modifications, substitutions and alterations to these embodiments are within the scope of the present invention without departing from the principles and spirit of the utility model.

Claims

1. A convenient coarse aggregate crushing value apparatus of operation, includes base (1) and compression leg (2), its characterized in that: the device comprises an upper sleeve (3) and a lower sleeve (4) which are coaxially and detachably connected, wherein the bottom of the lower sleeve (4) is arranged in a positioning groove (11) formed in the top of a base (1);

the lower sleeve (4) is of a left-right detachable structure, and a pushing mechanism (5) is arranged outside the positioning groove (11) and applies inward splicing pushing force to the left part and the right part of the lower sleeve (4);

the compression leg (2) can be vertically arranged on the axis of the lower sleeve (4) in a lifting way, and the bottom compression surface of the compression leg (2) is matched with the inner diameter of the lower sleeve (4).

2. An operationally convenient coarse aggregate crush value determinator as claimed in claim 1 wherein: the outer edge of the base (1) is provided with an annular baffle (6), and the pushing mechanisms (5) are symmetrically arranged on two sides of the annular baffle (6) in pairs.

3. An operationally convenient coarse aggregate crush value determinator as claimed in claim 2 wherein: the pushing mechanism (5) comprises a screw rod (51) in threaded connection with the annular baffle (6), a pushing block (52) arranged at the front end of the screw rod (51) and abutted against the outer wall of the sleeve, and a rocker (53) arranged at the tail end of the screw rod (51).

4. An operationally convenient coarse aggregate crush value determinator as claimed in claim 2 wherein: the upper sleeve (3) is also of a left-right detachable structure, the pushing mechanisms (5) are divided into an upper group and a lower group, and the pushing mechanisms (5) on the upper portion apply inward splicing pushing force to the upper sleeve (3).

5. An operationally convenient coarse aggregate crush value determinator as claimed in claim 1 wherein: the upper sleeve (3) and the lower sleeve (4) are detachably connected through a lock catch (7).