Simple device for fine aggregate test

Abstract

The utility model discloses a simple fine aggregate test device which comprises a base, a funnel, a plug rod, a measuring cylinder, a support assembly, a first electric driving assembly and a second electric driving assembly, one end of the plug rod is located in the funnel, and the plug rod is used for opening and closing a bottom opening of the funnel; the measuring cylinder is arranged on the base and positioned below the funnel; the support assembly is arranged on the base. The first electric driving assembly and the second electric driving assembly are arranged in the simple fine aggregate test device, the first electric driving assembly can fix the funnel and move relative to the first support, and the second electric driving assembly can fix the plug rod and move up and down in the vertical direction of the base. The defect of low efficiency caused by the fact that a crank is manually rotated to control the funnel and the plug rod to ascend is overcome, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering detection, in particular to a simple device for fine aggregate testing. Background Art

[0002] The relative density test of sand refers to measuring the minimum dry density of sand in the loosest state and the maximum dry density in the densest state, so as to obtain the maximum and minimum porosity ratio of sand, which is used to calculate the relative density of sand.

[0003] The minimum dry density test of sand adopts the funnel method and the measuring cylinder method. The current indoor geotechnical test requires two people to cooperate in the test, one of whom holds the funnel and the other holds the plug rod.

[0004] Since the test operation process takes a long time and is labor-intensive, the hand-held funnel and the stopper rod are prone to swinging left and right, causing test errors and reducing the accuracy of the test results.

[0005] The device for testing the minimum dry density of sand provided in the prior art solves the technical problem that the funnel and the plug rod need to be held by hand and are prone to swinging left and right. However, since a crank handle needs to be manually turned to drive the funnel and the conical plug rod to rise, it is difficult to control the funnel and the conical plug rod to rise at a uniform speed, and the manual operation of turning the crank handle takes a long time. Utility Model Content

[0006] Based on this, it is necessary to provide a simple fine aggregate test device that uses an electric drive assembly to drive the funnel and the plug rod to move up and down.

[0007] A simple device for fine aggregate testing, comprising:

[0008] Base;

[0009] funnel;

[0010] A stopper rod, the stopper rod passes through the funnel, and the bottom end of the stopper rod is used to open and close the bottom opening of the funnel;

[0011] A measuring cylinder, the measuring cylinder is disposed on the base, the measuring cylinder is located below the funnel, and the funnel part extends into the interior of the measuring cylinder;

[0012] A first bracket and a second bracket, wherein the first bracket and the second bracket are arranged on the base;

[0013] A first electric drive assembly, wherein the first electric drive assembly is fixed to the first bracket, the neck of the funnel is fixedly connected to the first electric drive assembly, and the first electric drive assembly is used to enable the funnel to move up and down in a direction perpendicular to the base;

[0014] The second electric drive assembly is fixed to the second bracket, the plug rod is fixedly connected to the second electric drive assembly, and the second electric drive assembly is used to realize the up and down movement of the plug rod in a direction perpendicular to the base.

[0015] Further, the first electric drive assembly includes a first connecting rod, a first motor, a first gear and a first ejector rod; the first motor is fixed to the first bracket, the first gear is rotatably fixed to the first bracket, the first ejector rod is slidably connected to the first bracket, the funnel is connected to one end of the first connecting rod, and the other end of the first connecting rod is fixedly connected to the upper end of the first ejector rod.

[0016] Furthermore, the output shaft of the first motor is connected to the first gear, the first ejector rod is provided with a rack in the vertical direction, the rack of the first ejector rod is meshed with the first gear, and the rotation of the first motor drives the funnel to move up and down in a direction perpendicular to the base.

[0017] Furthermore, the second electric drive assembly includes a second connecting rod, a second motor, a second gear and a second ejector rod; the second motor is fixed to the second bracket, the second gear is rotatably fixed to the second bracket, the second ejector rod is slidably connected to the second bracket, the plug rod is connected to one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected to the upper end of the second ejector rod.

[0018] Furthermore, the output shaft of the second motor is connected to the second gear, the second ejector rod is provided with a rack in the vertical direction, the rack of the second ejector rod is meshed with the second gear, and the rotation of the second motor drives the plug rod to move up and down in a direction perpendicular to the base.

[0019] Beneficial Effects

[0020] The present application provides a first electric drive assembly and a second electric drive assembly in a simple fine aggregate test device. The first electric drive assembly can realize the movement of the funnel relative to the first bracket, and the second electric drive assembly can realize the up and down movement of the plug rod in the vertical direction of the base, thereby solving the shortcomings of uneven rising speed of the funnel and the plug rod controlled by manually turning the crank and the resulting low efficiency, and improving the degree of automation and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of a simple device for fine aggregate testing;

[0023] Figure 2 It is a schematic diagram of a partial connection relationship between the first electric drive assembly and the second electric drive assembly.

[0024] Component names and serial numbers in the figure: 100. base; 200. funnel; 300. stopper rod; 400. measuring cylinder; 500. scale bracket; 510. first bracket; 520. second bracket; 700. first electric drive assembly; 720. first motor; 721. first gear; 722. first ejector rod; 723. output shaft of first motor; 724. first connecting rod; 800. second electric drive assembly; 820. second motor; 821. second gear; 822. second ejector rod; 823. output shaft of second motor; 824. second connecting rod.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] refer to Figure 1-Figure 2 As shown, this embodiment provides a simple device for testing fine aggregate, which includes a base 100, a funnel 200, a plug rod 300, a measuring cylinder 400, a first electric drive assembly 700 and a second electric drive assembly 800, a first bracket 510 and a second bracket 520.

[0030] The measuring cylinder 400, the first bracket 510 and the second bracket 520 are all fixedly arranged on the base 100, the first electric drive assembly 700 is fixed on the first bracket 510, and the second electric drive assembly 800 is fixed on the second bracket 520; the plug rod 300 passes through the funnel 200, and the bottom end of the plug rod 300 is used to open and close the bottom opening of the funnel 200; the measuring cylinder 400 is located below the funnel 200, and the funnel 200 partially extends into the measuring cylinder 400; the first electric drive assembly 700 is fixedly connected to the neck of the funnel 200, and the present embodiment is a detachable fixed connection. The first electric drive assembly 700 is used to realize the up and down movement of the funnel 200 in a direction perpendicular to the base 100; the second electric drive assembly 800 is fixedly connected to the plug rod 300, and the present embodiment is a detachable fixed connection. The second electric drive assembly 800 is used to realize the up and down movement of the plug rod 300 in a direction perpendicular to the base 100.

[0031] The first electric drive assembly 700 includes a first connecting rod 724, a first motor 720, a first gear 721 and a first ejector rod 722; the first motor 720 is fixed to the first bracket 510, the first gear 721 is rotatably fixed to the first bracket 510, and the first ejector rod 722 is slidably connected to the first bracket 510. In one embodiment, a dovetail groove is provided on the side of the first bracket 510, and the first ejector rod 722 is a trapezoidal shape embedded in the dovetail groove; the funnel 200 is a long-necked funnel, the first connecting rod 724 is a cylindrical long rod, the neck of the funnel 200 is connected to one end of the first connecting rod 724, and the other end of the first connecting rod 724 is fixedly connected to the upper end of the first ejector rod 722, and the output shaft 723 of the first motor is connected to the first gear 721. Specifically, the first A gear 721 takes the output shaft 723 of the first motor as the rotation center. The first gear 721 is rotatably fixed to the first bracket 510 through the output shaft 723 of the first motor. The first ejector rod 722 is provided with a rack in the vertical direction. The rack of the first ejector rod 722 is meshed with the first gear 721. The first motor 720 is connected to a power supply. The power supply uses direct current. The start and stop and forward and reverse rotation of the first motor 720 are controlled by a control switch (not shown in the figure). The rotation of the first motor 720 drives the output shaft 723 of the first motor to rotate. The output shaft 723 of the first motor drives the first gear 721 to rotate. The rotation of the first gear 721 drives the first ejector rod 722 to move up and down. The rotation of the first ejector rod 722 drives the funnel 200 to move up and down in the direction vertical to the base 100.

[0032] In one embodiment, it also includes a scale bracket 500, which is vertically fixed to the base 100, and a scale is provided on the scale bracket 500. The measuring cylinder 400 is made of transparent material. Through the measuring cylinder 400, the relative height between the plug rod 300 and the funnel 200 and the distance between the lower pipe opening of the funnel 200 and the sand surface can be roughly seen, thereby improving the accuracy of the experiment;

[0033] In another embodiment, the measuring cylinder 400 is made of a transparent material, and a scale is provided on the side wall of the measuring cylinder 400 , so the scale bracket 500 is not required.

[0034] The second electric drive assembly 800 includes a second connecting rod 824, a second motor 820, a second gear 821 and a second ejector rod 822. The second motor 820 is fixed to the second bracket 520, the second gear 821 is rotatably fixed to the second bracket 520, and the second ejector rod 822 is slidably connected to the first bracket 510. In one embodiment, a dovetail groove is provided on the side of the first bracket 510, and the first ejector rod 722 is a trapezoidal shape embedded in the dovetail groove; the plug rod 300 is a conical plug rod, and the second connecting rod 824 is a cylindrical long rod. The neck of the plug rod 300 is connected to one end of the second connecting rod 824, and the other end of the second connecting rod 824 is fixedly connected to the upper end of the second ejector rod 822. The output shaft 823 of the second motor is connected to the second gear 821. Specifically, the first The second gear 821 takes the output shaft 823 of the second motor as the rotation center. The second gear 821 is rotatably fixed to the second bracket 520 through the output shaft 823 of the second motor. The second ejector rod 822 is provided with a rack in the vertical direction. The rack of the second ejector rod 822 is meshed with the second gear 821. The second motor 820 is connected to a power supply. The power supply uses direct current. The start and stop and forward and reverse rotation of the second motor 820 are controlled by a control switch (not shown in the figure). The rotation of the second motor 820 drives the output shaft 823 of the second motor to rotate. The output shaft 823 of the second motor drives the second gear 821 to rotate. The rotation of the second gear 821 drives the second ejector rod 822 to move up and down. The rotation of the second ejector rod 822 drives the plug rod 300 to move up and down in the direction vertical to the base 100. In this embodiment, in order to control the upward movement rate of the funnel 200 and the plug rod 300 to be the same, the first motor 720 and the second motor 820 are of the same model, and the first gear 721 is the same as the second gear 821. In this embodiment, the first motor 720 and the second motor 820 use a reduction motor to control the ascent and descent speed. In another embodiment, a servo motor can also be used to control the lifting speed and position. Technical personnel in this field can select motors of different types and models as needed.

[0035] Operation process of the simple device for fine aggregate testing:

[0036] The neck of the stopper rod 300 is inserted from the bottom of the funnel 200 and extends out of the top of the funnel 200, and the funnel 200 and the stopper rod 300 are partially extended into the measuring cylinder 400, and the bottom conical end of the stopper rod 300 is kept at a certain distance from the bottom surface of the measuring cylinder 400, and the position of the funnel 200 is fixed by the first connecting rod 724, and the stopper rod 300 is lifted to close the bottom opening of the funnel 200. The second connecting rod 824 fixes the position of the stopper rod 300, and the fine aggregate is slowly poured into the top opening of the funnel 200. After 700g of the fine aggregate is added, the first motor 720 is started, and the first motor 720 rotates to drive the funnel 200 to move upward in the vertical direction of the base 100, thereby opening the bottom opening of the funnel 200, allowing the fine aggregate to slowly flow into the measuring cylinder 400, and the second motor 820 is started, and the second motor rotates to drive the funnel 200 to move upward in the vertical direction of the base 100, thereby opening the bottom opening of the funnel 200, allowing the fine aggregate to slowly flow into the measuring cylinder 400. The plug rod 300 moves upward in the vertical direction of the base 100, and the distance between the conical surface of the plug rod 300 and the bottom opening of the funnel 200 is controlled to be 1 to 2 cm. As the amount of fine aggregate in the measuring cylinder 400 increases, the first motor 720 and the second motor 820 are used to control the funnel 200 and the plug rod 300 to move upward at the same speed, so that the funnel 200 and the plug rod 300 are relatively stationary in the upward process, and the height between the bottom of the plug rod 300 and the fine aggregate is kept at 1 to 2 cm, the flow rate of the fine aggregate is kept consistent, and the fine aggregate flows out evenly. After all the fine aggregate flows into the measuring cylinder 400, the funnel 200 and the plug rod 300 are directly taken out, the first motor 720 and the second motor 820 are turned off, and the sand surface smoother is inserted into the measuring cylinder 400 to smooth the sand surface, and the volume of the sand sample is read to complete the test operation.

[0037] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A simple device for fine aggregate testing, characterized in that: include: Base; funnel; A stopper rod, the stopper rod passes through the funnel, and the bottom end of the stopper rod is used to open and close the bottom opening of the funnel; A measuring cylinder, the measuring cylinder is disposed on the base, the measuring cylinder is located below the funnel, and the funnel part extends into the interior of the measuring cylinder; A first bracket and a second bracket, wherein the first bracket and the second bracket are arranged on the base; A first electric drive assembly, wherein the first electric drive assembly is fixed to the first bracket, the neck of the funnel is fixedly connected to the first electric drive assembly, and the first electric drive assembly is used to enable the funnel to move up and down in a direction perpendicular to the base; The second electric drive assembly is fixed to the second bracket, the plug rod is fixedly connected to the second electric drive assembly, and the second electric drive assembly is used to realize the up and down movement of the plug rod in a direction perpendicular to the base.

2. The simple device for testing fine aggregate according to claim 1, characterized in that: The first electric drive assembly includes a first connecting rod, a first motor, a first gear and a first ejector rod; the first motor is fixed to the first bracket, the first gear is rotatably fixed to the first bracket, the first ejector rod is slidably connected to the first bracket, the funnel is connected to one end of the first connecting rod, and the other end of the first connecting rod is fixedly connected to the upper end of the first ejector rod.

3. The simple device for testing fine aggregate according to claim 2, characterized in that: The output shaft of the first motor is connected to the first gear. The first ejector rod is provided with a rack in the vertical direction. The rack of the first ejector rod is meshed with the first gear. The rotation of the first motor drives the funnel to move up and down in a direction perpendicular to the base.

4. The simple device for testing fine aggregate according to claim 1, characterized in that: The second electric drive assembly includes a second connecting rod, a second motor, a second gear and a second ejector rod; the second motor is fixed to the second bracket, the second gear is rotatably fixed to the second bracket, the second ejector rod is slidably connected to the second bracket, the plug rod is connected to one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected to the upper end of the second ejector rod.

5. The simple device for testing fine aggregate according to claim 4, characterized in that: The output shaft of the second motor is connected to the second gear. The second ejector rod is provided with a rack in the vertical direction. The rack of the second ejector rod is meshed with the second gear. The rotation of the second motor drives the plug rod to move up and down in a direction perpendicular to the base.

6. The simple device for testing fine aggregate according to claim 1, characterized in that: The measuring cylinder is made of transparent material, and a scale is arranged on the side wall of the measuring cylinder.

7. The simple device for testing fine aggregate according to claim 1, characterized in that: It also includes a scale bracket, which is vertically fixed to the base and has a scale on it.

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