CN107179261B - A kind of concrete slump automatic test equipment and its test method - Google Patents

Abstract

The invention discloses an automatic concrete slump test device and a test method, comprising a slump cylinder structure, a feeding structure and a slump test frame, the slump cylinder structure includes two half-slump cylinders, two half-slump cylinders After the combination, the inner chamber of the slump cylinder is formed, and the slump cylinder units are connected with the first driving structure; the slump cylinder structure is connected with the feeding structure; the slump test stand is provided with a tamping structure, a flattening structure, and a measuring structure in sequence. There is a guide rail under the slump test frame, and the slump test frame is also connected with the second drive structure. When the second drive structure drives the slump test frame to move along the guide rail, the tamping structure, flattening structure, and measuring structure Move to the top of the collapsed barrel structure in turn. The invention can automatically measure the concrete slump and concrete density, move and separate two semi-slumped cylinders, and simultaneously move the hopper and the feeding cylinder. The structure is simple, the degree of automation is high, and the measurement is accurate and reliable.

Description

A kind of concrete slump automatic test equipment and its test method

technical field

The invention relates to a concrete slump automatic test device and a test method thereof, which belong to the field of construction machinery automation.

Background technique

At present, the concrete slump test is mainly carried out manually. The main steps include filling the conical slump cylinder, inserting and pounding, scraping, lifting the cylinder, and measuring. Due to the influence of many factors, the measurement error is large, and the slump data is for reference.

Contents of the invention

In order to solve one of the problems in the above-mentioned prior art, the present invention provides an automatic concrete slump testing device and its testing method to solve the technical problems of time-consuming, labor-intensive measurement, poor measurement accuracy and low degree of automation in the prior art.

The technical solution adopted by the present invention to solve its technical problems is:

An automatic concrete slump testing device, comprising a slump cylinder structure, a feeding structure and a slump test stand, the slump cylinder structure includes at least two slump cylinder units, and the at least two slump cylinder units are combined Finally, a truncated cone-shaped inner cavity of the collapsing cylinder is formed, each of the collapsing cylinder units is connected with the first driving structure that drives the collapsing cylinder unit to move outward; the collapsing cylinder structure is connected with the feeding structure ; The slump test frame is provided with an insertion and tamping structure, a flattening structure, and a measurement structure in turn, and a guide rail is provided below the slump test frame, and the slump test frame is also connected to the second driving structure , when the second drive structure drives the slump test frame to move along the guide rail, the insertion and tamping structure, the flattening structure, and the measurement structure move to the top of the slump cylinder structure in sequence.

The concrete slump automatic testing equipment of the present invention divides the slump cylinder in the prior art into at least two slump cylinder units, and the combination of the slump cylinder units forms a complete slump cylinder. When separating, move several collapsing cylinder units outward through mechanical devices, so that when the collapsing cylinder and concrete are separated, the formed concrete will not be damaged, making the measurement more accurate. In addition, this equipment can also use an automatic feeding device, and at the same time use a tamping structure, a flattening structure, and a measuring structure to replace manual tamping, scraping and measurement, so as to realize automation, save labor and improve work efficiency.

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

Preferably, the feeding structure includes a hopper, the lower end of the hopper is connected to the feeding cylinder through a feeding control valve, one end of the feeding cylinder is provided with a feeding cylinder, and the end of the cylinder rod of the feeding cylinder is provided with a piston , the piston is located in the feeding cylinder, and the other end of the feeding cylinder is connected to the upper end of the collapsed cylinder structure.

Preferably, a load cell is connected below the hopper.

Preferably, after the at least two collapsing barrel units are combined, the lower part forms the truncated conical collapsing barrel inner cavity, and the upper end forms a cylindrical inner cavity, and the cylindrical inner cavity has an opening toward the side of the feeding barrel .

Preferably, the inserting and tamping structure includes several tamping rods for protruding into the inner cavity of the collapse cylinder and is connected with a third driving structure for driving the several tamping rods to move up and down.

Preferably, the inserting and tamping structure further includes:

A guide member fixed on the slump test frame, the plurality of tamping rods can move along the guide member in the up and down direction;

A tamping motor fixed on the slump test frame, the tamping motor is connected to a crank, the end of the crank is hingedly connected to a connecting rod, and the end of the connecting rod is connected to the upper ends of the several tamping rods through a rotating shaft hinged connection.

Preferably, the flattening structure includes a flattening column for extending into the upper end of the inner cavity of the collapse cylinder connected with a flattening cylinder for driving the flattening column to move up and down.

Preferably, the measurement structure includes a laser ranging sensor, and the laser ranging sensor is connected to the slump test frame.

Preferably, it also includes a pusher structure, the pusher structure includes a measuring cylinder fixed on the slump test frame, and the measuring cylinder is connected with a ejector for pushing away the measured concrete.

The present invention also provides the testing method of above-mentioned concrete slump automatic testing equipment, comprises the following steps:

(1) Initial position, the insertion and tamping structure, the flattening structure, and the measurement structure are all located on one side of the collapsed barrel structure;

(2) The first driving structure drives the collapse cylinder unit to move inwards, so that all the collapse cylinder units are formed to form a truncated conical collapse cylinder cavity;

(3) Control the feeding structure to fill the inner cavity of the truncated conical slump tube with concrete slurry until the inner cavity of the truncated conical slump tube is filled;

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

(5) When the slump test stand moves to the first position, the tamping structure corresponds to the structure of the slump tube, and the concrete slurry in the inner cavity of the slump tube is inserted and tamped;

(6) When the slump test frame moves to the second position, the flattening structure corresponds to the structure of the collapse cylinder, and the flattening structure flattens the upper part of the inner chamber of the collapse cylinder;

(7) The first driving structure drives the at least two slump tube units to move outward, so as to realize the separation of the slump tube units from each other, and the moving position ensures that the concrete has a sufficient slump size;

(8) After the concrete slump is completed, the slump test stand moves to the third position, and the measuring structure measures the concrete slump height and can measure the maximum diameter of the slump.

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

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the main view structural representation of the concrete slump automatic test equipment of the embodiment of the present invention;

Fig. 2 is the top view structure schematic diagram of concrete slump automatic test equipment of the embodiment of the present invention;

Fig. 3 is the concrete slump degree automatic test equipment A-A sectional structural diagram of the embodiment of the present invention;

Fig. 4 is the B-B cross-sectional structure diagram of the concrete slump automatic testing equipment of Fig. 1;

Fig. 5 is a C-C sectional structure diagram of the concrete slump automatic testing equipment in Fig. 1;

Fig. 6 is an enlarged view of part D of the automatic concrete slump test equipment in Fig. 1 .

Explanation of reference signs:

1-Guide rail, 2-Wheel, 3-Moving cylinder of the first half-collapse cylinder, 4-Movement cylinder support of the first half-collapse cylinder, 5-First half-collapse cylinder, 6-Shell of the first half-collapse cylinder , 7-feeding cylinder, 8-feeding control valve, 9-load cell bracket, 10-load cell, 11-hopper, 12-slump test frame, 13-tamping rod, 14-rotating shaft, 15-connection Rod, 16-crank, 17-insert tamper motor, 18-the first guide of the tamper, 18-1-the semicircular guide hole of the first guide of the tamper, 18-2-the circular guide hole of the first guide of the tamper, 19 -The second guide of the tamper, 19-1-the semicircular guide hole of the second guide of the tamper, 19-2-the round guide hole of the second guide of the tamper, 20-flatten the cylinder, 21-flatten the column, 22- The first guide of the flattening column, 23-the second guide of the flattening column, 24-the measuring cylinder, 25-the laser distance measuring sensor, 26-the ejector, 27-the pushing cylinder, 28-the positioning block at the right end of the wheel, 29 -wheel motor, 30-chain transmission, 31-wheel drive shaft, 32-moving cylinder of the second half-collapse cylinder, 33-second shell of the collapse cylinder, 34-bracket of hopper feeding cylinder, 35-second half-collapse cylinder Mobile cylinder support, 36-feeding cylinder, 37-the second half-collapsed cylinder.

Detailed ways

Embodiments of the present invention are described in detail below, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

As shown in Figure 1-6, the concrete slump automatic test equipment in this embodiment includes a feeding part (feeding structure), a slumping cylinder part (slumping cylinder structure), an inserting and tamping part (inserting and tamping structure), and a flattening part (flattening structure), measuring part (measuring structure), pushing part (pushing structure) and slump test frame 12.

The slump cylinder part is composed of two half-slump cylinders (slump cylinder unit), ie, the first half-slump cylinder 5 and the second half-slump cylinder 37, which are combined to form a truncated conical cavity. Each half-collapsed cylinder is connected with a first driving structure that drives the semi-collapsed cylinder to move outward. The collapse barrel part is connected with the feeding part. The inserting and tamping part, the flattening part, the measuring part and the pushing part are sequentially arranged on the slump test frame 12 from left to right. The bottom of the slump test frame 12 is provided with a guide rail 1, and the slump test frame 12 is also connected with the second driving structure. The flat part and the measuring part are sequentially moved to the top of the collapsing cylinder part.

Specifically, the second driving structure includes four wheels 2 under the slump test frame 12 , and wheel motors that drive the wheels 2 to move along the guide rail 1 . Driven by the wheel motor, the wheel drive shaft 31 on the wheel 2 is connected through the chain transmission 30, and then the four wheels 2 are driven to roll on the two parallel guide rails 1, and move intermittently to the left to complete the above three functions in sequence.

The feeding part has a weighing function, which is called the weighing feeding part. It includes a hopper feed cylinder support 34 , a feed cylinder 36 , a feed cylinder 7 , a blanking control valve 8 , a load cell support 9 , a load cell 10 , and a hopper 11 . The hopper feed cylinder support 34 is fixed on the mobile platform, the feed cylinder 36 is fixed on the hopper feed cylinder support 34, the cylinder body of the feed cylinder 7 is connected to the right side of the feed cylinder 36, and the cylinder rod of the feed cylinder 7 stretches out to the left Connected to the piston in the feeding tube 36, under the promotion of the cylinder rod, the piston in the feeding tube 36 moves to the left to push the concrete slurry in the feeding tube 36 to move to the left, and falls into the collapse tube. A load cell support 9 is connected to the upper part of the hopper feed tube support 34, and an annular load cell 10 is installed on the top of the load cell support 9. The weight of the concrete is weighed in order to calculate the density of the concrete. The outlet of the hopper 11 is equipped with a blanking control valve 8, which controls the size and shutdown of the blanking port, thereby controlling the flow of the concrete slurry. It can be seen that, by weighing the concrete entering the inner cavity of the collapsed tube, and then according to the volume of the inner cavity of the collapsed tube, the concrete density of the inner cavity of the collapsed tube can be obtained.

As a preferred example of this embodiment, wheels are provided below the hopper feed tube support 34 of the above-mentioned weighing material feeding part, and the right end of the hopper feed tube support 34 is connected with the first half-collapse cylinder moving cylinder 3, and the hopper feed tube support 34 The left end is connected with the shell 6 of the first half-collapsed cylinder. In this way, when the first half-collapse shell 6 drives the first half-collapse cylinder 5 to move outward, it can simultaneously drive the weighing material feeding part to move outward, which not only avoids the influence of the weighing material feeding part on the concrete slump, but also Avoid affecting the tamping part, flattening part, measuring part and pushing part.

The collapse cylinder part also includes a first half-collapse cylinder shell 6 and a second collapse cylinder shell 33, the first half-collapse cylinder 5 is inside the first half-collapse cylinder shell 6, and the second half-collapse cylinder 37 is in the The inner side of the second collapsed cylinder housing 33 is used to strengthen the first half-collapsed cylinder 5 and the second half-collapsed cylinder 37 and to connect the first driving structure. Advantageously, the first semi-collapsed cylinder 5 and the second semi-collapsed cylinder 37 form a structure whose lower part is truncated conical and whose upper part is cylindrical. There is a circular opening on the right side of the upper cylindrical structure (having a cylindrical inner cavity) of the half-collapsed cylinder 5, and the channel of the circular mouth is connected to the inner circle of the feeding cylinder 36 through the first semi-collapsed cylinder shell 6, and the hopper 11 The concrete slurry inside falls into the passage in the feeding cylinder 36 through the passage of the blanking control valve 8, and is pushed into the cylindrical and semi-collapsing cylinder composed of the first half-collapsing cylinder 5 and the second semi-collapsing cylinder 37 through the promotion of the feeding cylinder 7. Conical cavity. The first half-collapse cylinder 5, the first half-collapse cylinder shell 6, and the hopper feeding cylinder support 34 are pushed by the first half-collapse cylinder moving cylinder 3, and the second half-collapse cylinder 37 and the second collapse cylinder shell 33 are driven by The second half-collapse cylinder moves the cylinder 32 to promote. When both move inward, a slump tube is formed for loading, inserting and tamping, and flattening. When moving outward, the concrete slumps to measure the slump, and the measured concrete slurry is pushed away.

Inserting and pounding part comprises pounding bar 13, rotating shaft 14, connecting rod 15, crank 16, inserting and pounding motor 17, the first guide piece of pounding stick 18, the semicircular guide hole 18-1 of the first guiding piece of stamping stick, the first guiding piece of stamping stick Circle guide hole 18-2, the second guide member 19 of tamping rod, the second guide member semicircle guide hole 19-1 of tamping rod and the second guide member circular guide hole 19-2 of tamping rod. Insert and tamp motor 17 and drive crank 16 to rotate, and the end of crank 16 is hingedly connected with connecting rod 15, thereby drives connecting rod 15 to move in a plane. The end of connecting rod 15 is hinged to connect the upper end of a plurality of tamping rods 13 by rotating shaft 14, drives a plurality of tamping rods 13 in the tamping rod first guide member semicircle guide hole 18-1 of tamping rod first guide 18, tamping rod first Under the guidance of the second guide hole 19-1 of the tamping rod on the guide member circle guide hole 18-2 and the second guide member 19 of the tamping rod, the second guide member circle guide hole 19-2 of the tamping rod collapses the tube Move up and down in the cavity, insert and ram the concrete until the concrete is rammed. The inserting and tamping part of this embodiment adopts the structure that the crank connecting rod drives the slider to move, which can reduce the height of the equipment. If adopt the structure that cylinder rod directly promotes, because of tamping stick 13 strokes at least 400mm, cylinder bore at least 400mm, so height will at least 1200mm, crank length 200mm is enough in this structure, so can reduce the height of equipment.

The flattening part includes a flattening cylinder 20, a flattening column 21, a first guide 22 for the flattening column, and a second guide 23 for the flattening column. The guide piece 22 and the second guide piece 23 of the flattening column move down to the upper surface of the inserted concrete, that is, the lower end surface of the cylindrical structure. The concrete surface can be flattened by controlling the force of the cylinder, and then descended to the joint surface of the cylindrical part and the truncated cone part of the collapse cylinder. The effect of flattening is to measure the top surface of the concrete more accurately.

The first driving structure includes a first half-collapse cylinder moving cylinder 3 , a first half-collapse cylinder moving cylinder support 4 , a second half-collapse cylinder moving cylinder 32 , and a second half-collapse cylinder moving cylinder support 35 . The first half-collapse cylinder 5 is connected with the first half-collapse cylinder shell 6, and the first half-collapse cylinder shell 6 is connected with the first half-collapse cylinder moving cylinder 3, and the first half-collapse cylinder moving cylinder 3 is arranged at the Half of the collapse cylinder moves on the cylinder support 4. The second half-collapse cylinder 37 is connected with the second collapse cylinder casing 33, the second collapse cylinder casing 33 is connected with the second half-collapse cylinder moving cylinder 32, and the second half-collapse cylinder moving cylinder 32 is arranged on the second half Collapse cylinder mobile cylinder support 35. Among them, the weighing and feeding part includes a feeding cylinder 7, a blanking control valve 8, a load cell bracket 9, a load cell 10, a hopper 11, a hopper feeding tube bracket 34, and a feeding tube 36 are connected as a whole and collapsed in the first half Between the cylinder housing 6 and the first half-collapsed cylinder moving cylinder 3. The moving cylinder 3 of the first half-slump cylinder pushes the first half-slump cylinder 5, the shell of the first half-slump cylinder 6, the feeding cylinder 7, the discharge control valve 8, the load cell bracket 9, the load cell 10, and the hopper 11 , the feeding cylinder 36, the hopper feeding cylinder bracket 34 move, the second half-slump cylinder moving cylinder 32 pushes the second half-slump cylinder housing 33, and the second half-slump cylinder 37 to move, realizing the separation and synthesis of the two half-slump cylinders . Concrete slumps during separation, and the laser ranging sensor 25 measures the slump size, and completes feeding, inserting and pounding, and flattening during synthesis.

The measuring part comprises a measuring cylinder 24 and a laser ranging sensor 25. The laser ranging sensor 25 is mounted on the cylinder rod of the measuring cylinder 24, and the measuring cylinder drives the laser ranging sensor 25 to move up and down. The camera lens is close to the concrete slump height, and the measurement is more accurate. On the other hand, the laser distance measuring sensor 25 is lifted, and the laser distance measuring 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 it can be lifted up when pushing materials, which is convenient for pushing materials and does not pollute the sensors.

The pusher part includes a material ejector 26 and a material pusher cylinder 27, and the pusher cylinder 27 promotes the ejector 26 to move and push away the concrete slurry, and the volume of the concave part in the ejector 26 can hold the measured concrete slurry, which can Be a half cylinder, also can be other shapes.

The concrete slump automatic test equipment according to the embodiment of the present invention can automatically measure the concrete slump and concrete density, move and separate the two semi-slump cylinders, and simultaneously move the hopper and the feeding cylinder 36. The structure is simple and the degree of automation is high. The measurement is accurate and reliable.

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

(1) Initial position, the insertion and tamping structure, the flattening structure, the measuring structure, and the pushing mechanism are all located on one side of the collapsing cylinder structure;

(2) The first driving structure drives the collapse cylinder unit to move inwards, so that all the collapse cylinder units are formed to form a truncated conical collapse cylinder cavity;

(3) Control the feeding structure to fill the inner cavity of the truncated conical slump tube with concrete slurry until the inner cavity of the truncated conical slump tube is filled;

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

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

(6) When the slump test frame 12 moves to the second position, the flattening structure corresponds to the structure of the slump cylinder, and the flattening structure flattens the upper part of the inner chamber of the slump cylinder;

(7) The first driving structure drives the at least two slump tube units to move outward, so as to realize the separation of the slump tube units from each other, and the moving position ensures that the concrete has a sufficient slump size;

(8) After the concrete slump is completed, the slump test frame 12 moves to the third position, the measuring structure measures the concrete slump height, and can measure the maximum diameter of the slump.

Specifically, when the concrete slump automatic test equipment is working, the slump test frame 12 and its parts (inserting and pounding part, flattening part, measuring part, pushing part) are driven by the wheel motor 29 and pass through the chain Transmission 30, wheel drive shaft 31, drive wheel 2 and move to the right end on two parallel guide rails 1, stop on the wheel right end positioning block 28 positions. The moving cylinder 3 of the first half-slump cylinder pushes the first half-slump cylinder 5, the shell of the first half-slump cylinder 6, the feeding cylinder 7, the discharge control valve 8, the load cell bracket 9, the load cell 10, and the hopper 11 , the feeding cylinder 36, the hopper feeding cylinder support 34 move inwardly, the second half-collapse cylinder moving cylinder 32 pushes the second collapse cylinder shell 33, and the second half-collapse cylinder 37 moves inward to realize two half-collapse cylinders Synthesis. The stirred concrete slurry is added to the hopper 11 (the slump test frame 12 is made into a circle on the upper part of the hopper 11, which does not affect the feeding), the load cell 10 weighs, and the weight of the concrete slurry that meets the requirements is reached, and the feeding is opened. Control valve 8, the concrete slurry enters the feeding cylinder 36, and the feeding cylinder 7 pushes the cylinder rod to move to the left, and the slurry falls into the collapse cylinder. According to the volume of the feeding cylinder 36, the feeding control valve 8 is opened and closed and the number of times of feeding is determined until it collapses. The conical frustum of the drop cylinder is filled, and the cylinder reaches a suitable height. Then start the wheel motor 29, drive the slump test frame 12 and the parts above it to move to the left, stop advancing when some tamping rod displacements collapse above the tube, start the insertion tamping motor 17, drive the crank connecting rod motion, and drive some tamping rods. The tamping rod 13 moves up and down, inserts and tamps concrete, stops the tamping rod to move up and down after several times of tamping, and stops at the top (does not affect the slump test frame 12 and continues to move to the left). Start the wheel motor 29 again to drive the slump test frame 12 to move to the left. When the flattening column 21 is located at the upper part of the slump tube, the wheels stop advancing, and the flattening column 21 moves downward under the drive of the flattening cylinder 20 to flatten the cylinder. On the upper surface of the concrete slurry, the flattened post 21 rises to the top.

The moving cylinder 3 of the first half-slump cylinder pushes the first half-slump cylinder 5, the shell of the first half-slump cylinder 6, the feeding cylinder 7, the discharge control valve 8, the load cell bracket 9, the load cell 10, and the hopper 11 , the feeding cylinder 36, the hopper feeding cylinder bracket 34 move outwards, the second half-collapse cylinder moving cylinder 32 pushes the second collapse cylinder shell 33, and the second half-collapse cylinder 37 moves outward to realize two half-collapse cylinders The separation and moving distance ensure that the concrete has sufficient collapse size.

After the concrete has collapsed, the wheel motor 29 drives the slump test frame 12 to move to the left again, and the measuring cylinder 24 drives the laser distance measuring sensor 25 to measure the concrete collapse height, and can measure the maximum diameter of the collapse, and the laser distance measurement The sensor 25 rises to the upper part.

The slump test frame 12 continues to move to the left (it may not move to the left, the measurement process can always move to the left --- the measurement sensor should still be lifted when pushing the material to prevent the lens from being polluted), and the material pushing cylinder 27 pushes the ejector 26 moves to the left to release the measured concrete slurry.

For equipment cleaning, manual hand-held nozzles are used to rinse the parts that will be in contact with concrete materials.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention 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.