CN107179261B - Automatic concrete slump testing equipment and testing method thereof - Google Patents

Abstract

The invention discloses automatic testing equipment and a testing method for concrete slump, wherein the automatic testing equipment comprises a slump barrel structure, a feeding structure and a slump testing frame, the slump barrel structure comprises two half slump barrels, the two half slump barrels are combined to form a slump barrel inner cavity, and slump barrel units are connected with a first driving structure; the slump cylinder structure is connected with the feeding structure; the slump test frame is sequentially provided with an inserting and tamping structure, a flattening structure and a measuring structure, a guide rail is arranged below the slump test frame, the slump test frame is further connected with a second driving structure, and when the slump test frame is driven by the second driving structure to move along the guide rail, the inserting and tamping structure, the flattening structure and the measuring structure sequentially move to the position above the slump barrel structure. The invention can automatically measure the slump and the density of concrete, split and move to separate two half slump barrels, and simultaneously move the hopper and the feeding barrel, has simple structure, high automation degree and accurate and reliable measurement.

Description

Automatic concrete slump testing equipment and testing method thereof

Technical Field

The invention relates to automatic testing equipment and a testing method for concrete slump, and belongs to the field of automation of construction machinery.

Background

At present, the slump test of concrete is mainly performed manually, and mainly comprises the steps of filling a conical slump barrel, inserting and tamping, strickling, lifting the barrel, measuring and the like, which is time-consuming and labor-consuming, inaccurate in measurement, and also comprises the steps of adopting an amperometric method, a moment method and the like for online measurement, and because of the influence of a plurality of factors, the measurement error is large, and slump data are provided for reference.

Disclosure of Invention

The invention aims to solve one of the problems in the prior art, and provides automatic testing equipment and a testing method for concrete slump, so as to solve the technical problems of time and labor waste, poor measurement accuracy and low automation degree in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

the automatic concrete slump testing equipment comprises a slump barrel structure, a feeding structure and a slump testing frame, wherein the slump barrel structure comprises at least two slump barrel units, a slump barrel inner cavity with a truncated cone shape is formed by combining the at least two slump barrel units, and each slump barrel unit is connected with a first driving structure for driving the slump barrel unit to move outwards; the slump barrel structure is connected with the feeding structure; the slump test frame is sequentially provided with an inserting and tamping structure, a flattening structure and a measuring structure, a guide rail is arranged below the slump test frame, the slump test frame is further connected with a second driving structure, and when the slump test frame is driven by the second driving structure to move along the guide rail, the inserting and tamping structure, the flattening structure and the measuring structure sequentially move to the position above the slump barrel structure.

The automatic slump testing equipment of the invention divides a slump barrel in the prior art into at least two slump barrel units, and the slump barrel units are combined to form a complete slump barrel. During separation, the slump barrels and the concrete are separated by moving the slump barrel units outwards through the mechanical device, so that the formed concrete is not damaged, and the measurement is more accurate. In addition, the equipment can also adopt an automatic feeding device, and meanwhile adopts an inserting and tamping structure, a flattening structure and a measuring structure to replace manual inserting and tamping, flattening and measuring, so that automation is realized, the labor is saved, and the working efficiency is improved.

In addition, the automatic concrete slump testing equipment according to the embodiment of the invention can also have the following additional technical characteristics:

preferably, the feeding structure comprises a hopper, the lower end of the hopper is connected with the feeding cylinder through a blanking control valve, one end of the feeding cylinder is provided with a feeding cylinder, the end part of a cylinder rod of the feeding cylinder is provided with a piston, the piston is positioned in the feeding cylinder, and the other end of the feeding cylinder is connected with the upper end of the slump cylinder structure.

Preferably, a weighing sensor is also connected below the hopper.

Preferably, the lower part of the combined at least two slump cylinder units forms a cone-shaped slump cylinder inner cavity, the upper end of the combined at least two slump cylinder units forms a cylindrical inner cavity, and one side of the cylindrical inner cavity, which faces the feeding cylinder, is provided with an opening.

Preferably, the tamping mechanism comprises a plurality of tamping rods extending into the cavity of the slump tube and a third driving mechanism for driving the plurality of tamping rods to move up and down.

Preferably, the tamping structure further comprises:

a guide fixed to the slump test rack, along which the plurality of tamper bars are movable in an up-down direction;

the inserting and tamping motor is fixed on the slump testing frame and is connected with the crank, the tail end of the crank is hinged with the connecting rod, and the tail end of the connecting rod is hinged with the upper ends of the tamping rods through the rotating shaft.

Preferably, the flattening structure comprises a flattening column which is used for extending into the upper end of the cavity of the slump cylinder, and a flattening cylinder which is used for driving the flattening column to move up and down.

Preferably, the measurement structure comprises a laser ranging sensor connected to the slump test rack.

Preferably, the slump test rack further comprises a pushing structure, wherein the pushing structure comprises a measuring cylinder fixed on the slump test rack, and the measuring cylinder is connected with a stripper for pushing away the measured concrete.

The invention also provides a testing method of the automatic concrete slump testing equipment, which comprises the following steps:

(1) The initial position, the inserting and tamping structure, the flattening structure and the measuring structure are all positioned at one side of the slump barrel structure;

(2) The first driving structure drives the slump barrel units to move inwards to form a slump barrel inner cavity with a truncated cone shape after all slump barrel units are formed;

(3) The feeding structure is controlled to fill concrete slurry into the cavity of the cone-shaped slump cylinder until the cavity of the cone-shaped slump cylinder is filled;

(4) The second driving structure drives the slump test rack to move along the guide rail;

(5) When the slump test frame moves to a first position, the inserting and tamping structure corresponds to the slump cylinder structure, and concrete slurry in the cavity of the slump cylinder is inserted and tamping;

(6) When the slump test frame moves to the second position, the flattening structure corresponds to the slump barrel structure, and the flattening structure flattens the upper part of the cavity of the slump barrel;

(7) The first driving structure drives the at least two slump barrel units to move outwards to realize mutual separation of slump barrel units, and the moving position ensures that the concrete has enough slump size;

(8) When the concrete slump is complete, the slump test rack is moved to a third position and the measuring structure measures the height of the concrete slump and is able to measure the maximum diameter of the slump.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram showing a front view of an automatic concrete slump testing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic top view of an embodiment of the automatic concrete slump testing apparatus according to the present invention;

FIG. 3 is a cross-sectional block diagram of an automated concrete slump testing apparatus A-A according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the automated slump test equipment B-B of FIG. 1;

FIG. 5 is a cross-sectional block diagram of the automatic slump testing apparatus C-C of FIG. 1;

fig. 6 is an enlarged view of section D of the automatic slump test equipment of fig. 1.

Reference numerals illustrate:

1-guide rail, 2-wheel, 3-first half slump cylinder moving cylinder, 4-first half slump cylinder moving cylinder support, 5-first half slump cylinder, 6-first half slump cylinder shell, 7-feeding cylinder, 8-blanking control valve, 9-weighing sensor support, 10-weighing sensor, 11-hopper, 12-slump test rack, 13-tamper, 14-spindle, 15-connecting rod, 16-crank, 17-plunger motor, 18-tamper first guide, 18-1-tamper first guide semicircle guide hole, 18-2-tamper first guide circle guide hole, 19-tamper second guide, the device comprises a semicircular guide hole of a second guide piece of a 19-1-rammer, a circular guide hole of a second guide piece of a 19-2-rammer, a 20-flattening cylinder, a 21-flattening column, a 22-flattening column first guide piece, a 23-flattening column second guide piece, a 24-measuring cylinder, a 25-laser ranging sensor, a 26-stripper, a 27-pushing cylinder, a 28-wheel right end positioning block, a 29-wheel motor, a 30-chain transmission, a 31-wheel driving shaft, a 32-second half slump cylinder, a 33-second slump cylinder shell, a 34-hopper feeding cylinder support, a 35-second half slump cylinder moving cylinder support, a 36-feeding cylinder and a 37-second half slump cylinder.

Detailed Description

Embodiments of the present invention are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 6, the automatic concrete slump test apparatus of the present embodiment includes a feeding section (feeding structure), a slump barrel section (slump barrel structure), an insertion section (insertion structure), a flattening section (flattening structure), a measuring section (measuring structure), a pushing section (pushing structure), and a slump test stand 12.

Wherein the slump barrel part is formed by combining two half slump barrels (slump barrel units), namely a first half slump barrel 5 and a second half slump barrel 37, and a slump barrel inner cavity with a cone frustum shape is formed. Each half-slump barrel is connected to a first drive structure that drives the half-slump barrel outwardly. The slump barrel section is connected to the feed section. The tamping, flattening, measuring and pushing sections are positioned on the slump test rack 12 in sequence from left to right. The guide rail 1 is arranged below the slump test frame 12, the slump test frame 12 is also connected with a second driving structure, and when the slump test frame 12 is driven by the second driving structure to move along the guide rail 1, the tamping part, the flattening part and the measuring part are sequentially moved to the position above the slump barrel part.

In particular, the second drive structure comprises four wheels 2 below the slump test bed 12, and a wheel motor driving the wheels 2 along the rail 1. Under the driving of the wheel motors, the wheel driving shafts 31 on the wheels 2 are connected through the chain transmission 30, so that the four wheels 2 are driven to roll on the two parallel guide rails 1, and intermittently move leftwards to sequentially complete the three functions.

The feeding part has a weighing function and is called a balance feeding part. The automatic feeding device comprises a hopper feeding cylinder bracket 34, a feeding cylinder 36, a feeding cylinder 7, a discharging control valve 8, a weighing sensor bracket 9, a weighing sensor 10 and a hopper 11. The hopper feeding cylinder bracket 34 is fixed on a moving platform, a feeding cylinder 36 is fixed on the hopper feeding cylinder bracket 34, the right side of the feeding cylinder 36 is connected with the cylinder body of the feeding cylinder 7, the cylinder rod of the feeding cylinder 7 stretches out leftwards and is connected to the piston in the feeding cylinder 36, and the piston in the feeding cylinder 36 moves leftwards under the pushing of the cylinder rod to push the concrete slurry in the feeding cylinder 36 to move leftwards and fall into the slump cylinder. The upper part of the hopper feeding cylinder bracket 34 is connected with a weighing sensor bracket 9, the upper part of the weighing sensor bracket 9 is provided with an annular weighing sensor 10, the hopper 11 is arranged on the weighing sensor 10, and the weighing sensor 10 is used for weighing the weight of the concrete in the hopper 11 so as to calculate the density of the concrete. The outlet of the hopper 11 is provided with a blanking control valve 8, and the blanking control valve 8 controls the size and the closing of a blanking opening, thereby controlling the flow of concrete slurry. From this, it is known that the concrete density of the cavity of the slump can be determined by weighing the concrete that has entered the cavity of the slump can and then based on the volume of the cavity of the slump can.

As a preferred example of this embodiment, wheels are provided below the hopper feed cylinder bracket 34 of the above-described scale feed section, and the right end of the hopper feed cylinder bracket 34 is connected to the first half slump cylinder moving cylinder 3, and the left end of the hopper feed cylinder bracket 34 is connected to the first half slump cylinder housing 6. Thus, when the first half slump barrel shell 6 drives the first half slump barrel 5 to move outwards, the balance feeding part can be simultaneously driven to move outwards, so that the influence of the balance feeding part on concrete slump is avoided, and the influence of the insertion part, the flattening part, the measuring part and the pushing part is avoided.

The slump can section further comprises a first half slump can housing 6, a second half slump can housing 33, the first half slump can 5 being inside the first half slump can housing 6, and a second half slump can 37 being inside the second half slump can housing 33 for stiffening the first half slump can 5 and the second half slump can 37 and for connecting the first drive structure. Advantageously, the first half slump cylinder 5 and the second half slump cylinder 37 form a structure with a conical bottom and a cylindrical upper part, the conical bottom is a large circle, the cylindrical upper part of the first half slump cylinder 5 is provided with a circular opening on the right side, and the circular opening is connected with the inner circle of the feeding cylinder 36 through the first half slump cylinder shell 6, the concrete slurry in the hopper 11 falls into the channel in the feeding cylinder 36 through the channel of the blanking control valve 8, and is pushed into the cylindrical and conical inner cavity formed by the first half slump cylinder 5 and the second half slump cylinder 37 by the pushing of the feeding cylinder 7. The first half slump pot 5, the first half slump pot housing 6, the hopper feed pot support 34 are pushed by the first half slump pot moving cylinder 3, and the second half slump pot 37, the second slump pot housing 33 are pushed by the second half slump pot moving cylinder 32. When both are moved inwards, a slump barrel is formed, loading, tamping and flattening are carried out, and when both are moved outwards, slump is measured after slump is completed by concrete, and the measured concrete slurry is pushed away.

The plunger portion includes a tamper 13, a spindle 14, a link 15, a crank 16, a plunger motor 17, a tamper first guide 18, a tamper first guide half round guide hole 18-1, a tamper first guide round guide hole 18-2, a tamper second guide 19, a tamper second guide half round guide hole 19-1, and a tamper second guide round guide hole 19-2. The tamping motor 17 drives the crank 16 to rotate, and the tail end of the crank 16 is hinged with the connecting rod 15, so that the connecting rod 15 is driven to move in a plane. The tail end of the connecting rod 15 is hinged with the upper ends of the tamping rods 13 through the rotating shaft 14, so that the tamping rods 13 are driven to move up and down in the cavity of the slump cylinder under the guidance of the tamping rod first guide half round guide hole 18-1, the tamping rod first guide half round guide hole 18-2 and the tamping rod second guide half round guide hole 19-1 and the tamping rod second guide half round guide hole 19-2 on the tamping rod first guide 18 and the tamping rod second guide 19 until concrete is tamped. The structure that the crank connecting rod drives the sliding block to move is adopted in the tamping part of the embodiment, so that the height of equipment can be reduced. If a structure that the cylinder rod directly pushes is adopted, the height of the cylinder barrel is at least 1200mm because the stroke of the tamping rod 13 is at least 400mm and the cylinder barrel is at least 400mm, and the length of the crank in the structure is 200mm, so that the height of the equipment can be reduced.

The flattening part comprises a flattening cylinder 20, a flattening column 21, a flattening column first guide piece 22 and a flattening column second guide piece 23, wherein the flattening cylinder 20 moves up and down to drive the flattening column 21 to move to the upper surface of the concrete which is inserted and tamped under the guidance of the flattening column first guide piece 22 and the flattening column second guide piece 23, namely the lower end surface of the cylindrical structure. The concrete surface is flattened by controlling the acting force of the cylinder and then is lowered to the joint surface of the cylindrical part and the truncated cone part of the slump cylinder. The flattening function is to measure the upper surface of the concrete more accurately.

The first drive structure includes a first half-slump can moving cylinder 3, a first half-slump can moving cylinder mount 4, a second half-slump can moving cylinder 32, and a second half-slump can moving cylinder mount 35. The first half-slump pot 5 is connected to a first half-slump pot housing 6, the first half-slump pot housing 6 being connected to a first half-slump pot moving cylinder 3, the first half-slump pot moving cylinder 3 being arranged on the first half-slump pot moving cylinder support 4. The second half-slump pot 37 is connected to the second slump pot housing 33, the second slump pot housing 33 is connected to the second half-slump pot moving cylinder 32, and the second half-slump pot moving cylinder 32 is disposed on the second half-slump pot moving cylinder mount 35. The weighing and feeding part comprises a feeding cylinder 7, a discharging control valve 8, a weighing sensor bracket 9, a weighing sensor 10, a hopper 11, a hopper feeding cylinder bracket 34 and a feeding cylinder 36 which are connected between the first half slump cylinder shell 6 and the first half slump cylinder moving cylinder 3 as a whole. The first half slump cylinder moving cylinder 3 pushes the first half slump cylinder 5, the first half slump cylinder shell 6, the feeding cylinder 7, the blanking control valve 8, the weighing sensor bracket 9, the weighing sensor 10, the hopper 11, the feeding cylinder 36 and the hopper feeding cylinder bracket 34 to move, and the second half slump cylinder moving cylinder 32 pushes the second slump cylinder shell 33 and the second half slump cylinder 37 to move, so that separation and synthesis of the two half slump cylinders are realized. The concrete slumps during separation, the slump is measured by a laser ranging sensor 25, and feeding, tamping and flattening are completed during synthesis.

The measuring part comprises a measuring cylinder 24 and a laser ranging sensor 25, the laser ranging sensor 25 is arranged on a cylinder rod of the measuring cylinder 24, and the measuring cylinder drives the laser ranging sensor 25 to move up and down, so that on one hand, the lens of the laser ranging sensor 25 is close to the slump height during measurement, the measurement is more accurate, on the other hand, the laser ranging sensor 25 is lifted, and the laser ranging sensor 25 is not polluted when the concrete slurry is pushed away. In this embodiment, the laser ranging sensor 25 can move up and down, and is lifted up during pushing, so that pushing is facilitated, and the sensor is not polluted.

The pushing part comprises a stripper 26 and a pushing cylinder 27, the pushing cylinder 27 pushes the stripper 26 to move to push away the concrete slurry, and the volume of the concave part in the stripper 26 can be used for containing the measured concrete slurry and can be a semi-cylinder or other shapes.

The automatic concrete slump testing equipment can automatically measure the slump and the concrete density, split the two half slump barrels, simultaneously, move the hopper and the feeding barrel 36, and have simple structure, high automation degree and accurate and reliable measurement.

The embodiment also provides a testing method of the automatic concrete slump testing equipment, which comprises the following steps:

(1) The initial position, the inserting and tamping structure, the flattening structure, the measuring structure and the pushing mechanism are all positioned at one side of the slump barrel structure;

(2) The first driving structure drives the slump barrel units to move inwards to form a slump barrel inner cavity with a truncated cone shape after all slump barrel units are formed;

(3) The feeding structure is controlled to fill concrete slurry into the cavity of the cone-shaped slump cylinder until the cavity of the cone-shaped slump cylinder is filled;

(4) The second drive structure drives the slump test rack 12 to move along the guide rail 1;

(5) When the slump test rack 12 moves to the first position, the inserting and tamping structure corresponds to the slump cylinder structure, and concrete slurry in the cavity of the slump cylinder is inserted and tamped;

(6) When the slump test rack 12 is moved to the second position, the flattening structure corresponds to the slump barrel structure, and the flattening structure flattens the upper part of the cavity of the slump barrel;

(7) The first driving structure drives the at least two slump barrel units to move outwards to realize mutual separation of slump barrel units, and the moving position ensures that the concrete has enough slump size;

(8) When the concrete slump is complete, the slump test rack 12 is moved to a third position, the measuring structure measures the height of the concrete slump and is able to measure the maximum diameter of the slump.

Specifically, when the automatic concrete slump testing equipment works, the slump testing frame 12 and parts (the inserting and tamping part, the flattening part, the measuring part and the pushing part) on the slump testing frame are driven by the wheel motor 29 to drive the wheels 2 to move to the right ends on the two parallel guide rails 1 through the chain transmission 30 and the wheel driving shaft 31, and stop at the position of the wheel right end positioning block 28. The first half slump barrel moving cylinder 3 pushes the first half slump barrel 5, the first half slump barrel shell 6, the feeding cylinder 7, the blanking control valve 8, the weighing sensor bracket 9, the weighing sensor 10, the hopper 11, the feeding barrel 36 and the hopper feeding barrel bracket 34 to move inwards, and the second half slump barrel moving cylinder 32 pushes the second slump barrel shell 33 and the second half slump barrel 37 to move inwards, so that the two half slump barrels are combined. The stirred concrete slurry is added into a hopper 11 (a slump test frame 12 is made into a round shape at the upper part of the hopper 11, the feeding is not influenced), a weighing sensor 10 weighs, the weight of the concrete slurry meeting the requirement is achieved, a discharging control valve 8 is opened, the concrete slurry enters a feeding cylinder 36, a feeding cylinder 7 pushes a cylinder rod to move leftwards, the slurry falls into the slump cylinder, the times of closing and feeding of the discharging control valve 8 are determined according to the volume of the feeding cylinder 36 until the cone frustum of the slump cylinder is filled, and the cylinder reaches a proper height. Then, the wheel motor 29 is started to drive the slump test frame 12 and the parts above the slump test frame to move leftwards, the tamping motor 17 is started to drive the crank connecting rod to move to drive the tamping rods 13 to move up and down when the tamping rods are moved above the slump barrel, the concrete is inserted and tamped, the tamping rods are stopped to move up and down after the tamping rods are inserted and tamped for a plurality of times, and the slump test frame 12 is stopped at the upper part (the slump test frame 12 is not influenced to move leftwards continuously). The wheel motor 29 is started again to drive the slump test frame 12 to move leftwards, when the flattening column 21 is positioned at the upper part of the slump barrel, the wheels stop advancing, the flattening column 21 moves downwards under the drive of the flattening cylinder 20 to flatten the upper surface of the concrete slurry, and the flattening column 21 rises to the upper part.

The first half slump cylinder moving cylinder 3 pushes the first half slump cylinder 5, the first half slump cylinder shell 6, the feeding cylinder 7, the blanking control valve 8, the weighing sensor bracket 9, the weighing sensor 10, the hopper 11, the feeding cylinder 36 and the hopper feeding cylinder bracket 34 to move outwards, the second half slump cylinder moving cylinder 32 pushes the second slump cylinder shell 33 and the second half slump cylinder 37 to move outwards, separation of the two half slump cylinders is achieved, and the moving distance ensures that the concrete has enough slump size.

When the slump of the concrete is completed, the wheel motor 29 again drives the slump test frame 12 to move leftwards, the measuring cylinder 24 drives the laser ranging sensor 25 to measure the slump height of the concrete, the maximum diameter of the slump can be measured, and the laser ranging sensor 25 is lifted to the upper part.

Slump test rack 12 continues to move to the left (or not), the measuring process can move to the left all the time-the measuring sensor should be lifted when pushing the concrete, the pollution of the lens is prevented, and the pushing cylinder 27 pushes the ejector 26 to move to the left, so that the measured concrete slurry is pushed out.

The equipment is cleaned by adopting a manual hand-held spray head to flush the contacted part of the concrete material.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The automatic concrete slump testing equipment is characterized by comprising a slump barrel structure, a feeding structure and a slump testing frame, wherein the slump barrel structure comprises at least two slump barrel units, a slump barrel inner cavity with a truncated cone shape is formed by combining the at least two slump barrel units, and each slump barrel unit is connected with a first driving structure for driving the slump barrel units to move outwards; the slump barrel structure is connected with the feeding structure; the slump test frame is sequentially provided with an inserting and tamping structure, a flattening structure and a measuring structure, a guide rail is arranged below the slump test frame, the slump test frame is further connected with a second driving structure, and when the slump test frame is driven by the second driving structure to move along the guide rail, the inserting and tamping structure, the flattening structure and the measuring structure sequentially move to the position above the slump barrel structure.

2. The automatic concrete slump testing equipment according to claim 1, wherein the feeding structure comprises a hopper, the lower end of the hopper is connected with a feeding cylinder through a blanking control valve, one end of the feeding cylinder is provided with a feeding cylinder, the end of a cylinder rod of the feeding cylinder is provided with a piston, the piston is positioned in the feeding cylinder, and the other end of the feeding cylinder is connected with the upper end of the slump cylinder structure.

3. The automatic concrete slump testing apparatus according to claim 2, wherein a load cell is further connected below the hopper.

4. The automatic concrete slump testing equipment according to claim 2, wherein the at least two slump barrel units are combined to form a slump barrel inner cavity in a shape of a truncated cone at a lower part, a cylindrical inner cavity is formed at an upper end, and an opening is formed at a side of the cylindrical inner cavity facing the feeding barrel.

5. The automated concrete slump testing apparatus of claim 1 wherein the plunger structure includes a plurality of plungers for extending into the interior cavity of the slump barrel and a third drive structure for driving the plurality of plungers up and down.

6. The automatic concrete slump testing apparatus according to claim 5, wherein the mashing structure further comprises: a guide fixed to the slump test rack, along which the plurality of tamper bars are movable in an up-down direction; the inserting and tamping motor is fixed on the slump testing frame and is connected with the crank, the tail end of the crank is hinged with the connecting rod, and the tail end of the connecting rod is hinged with the upper ends of the tamping rods through the rotating shaft.

7. The automated concrete slump test equipment of claim 1 wherein the flattening structure includes a flattening cylinder for extending into the upper end of the slump cylinder cavity and for driving the flattening cylinder up and down.

8. The automated concrete slump test equipment of claim 1, wherein the measurement structure includes a laser ranging sensor connected to the slump test rack.

9. The automatic concrete slump test equipment according to claim 1, further comprising a pushing structure including a pushing cylinder fixed to the slump test rack, the pushing cylinder being connected to a stripper for pushing away the measured concrete.

10. A method of testing an automatic concrete slump testing apparatus according to any one of claims 1 to 9, comprising the steps of:

(1) The initial position, the inserting and tamping structure, the flattening structure and the measuring structure are all positioned at one side of the slump barrel structure;

(2) The first driving structure drives the slump barrel units to move inwards to form a slump barrel inner cavity with a truncated cone shape after all slump barrel units are formed;

(3) The feeding structure is controlled to fill concrete slurry into the cavity of the cone-shaped slump cylinder until the cavity of the cone-shaped slump cylinder is filled;

(4) The second driving structure drives the slump test rack to move along the guide rail;

(5) When the slump test frame moves to a first position, the inserting and tamping structure corresponds to the slump cylinder structure, and concrete slurry in the cavity of the slump cylinder is inserted and tamping;

(6) When the slump test frame moves to the second position, the flattening structure corresponds to the slump barrel structure, and the flattening structure flattens the upper part of the cavity of the slump barrel;

(7) The first driving structure drives the at least two slump barrel units to move outwards to realize mutual separation of slump barrel units, and the moving position ensures that the concrete has enough slump size;

(8) When the concrete slump is complete, the slump test rack is moved to a third position and the measuring structure measures the height of the concrete slump and is able to measure the maximum diameter of the slump.