CN111660434A

CN111660434A - Laboratory is with small-size concrete system of trying on

Info

Publication number: CN111660434A
Application number: CN202010404649.5A
Authority: CN
Inventors: 吴振军
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-09-15
Anticipated expiration: 2040-05-14
Also published as: CN111660434B

Abstract

The invention discloses a small-sized concrete trial-mixing system for a laboratory, which comprises a pre-mixing box, a mixing table, a feeding auger and a main mixing box, wherein the mixing table for mixing and weighing concrete raw materials is arranged above a feeding port of the pre-mixing box, the raw materials enter the pre-mixing box after being mixed by the mixing table, and then a discharging port of the main mixing pre-mixing box is communicated with the feeding port of the main mixing box by the feeding auger. The small concrete trial-matching system can be used for matching concrete in a laboratory, the matching table is matched with the charging barrel to weigh raw materials, the raw materials with expected proportion can be conveniently obtained, the concrete matching efficiency is improved, and the pre-stirring is arranged before the main stirring of the raw materials, so that the concrete stirring speed can be improved, and the matching efficiency is high; the whole system is convenient to clean and high in practicability.

Description

Laboratory is with small-size concrete system of trying on

Technical Field

The invention relates to the technical field of concrete production and mix proportion research and development, in particular to a small-sized concrete trial system for a laboratory.

Background

The concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Different types of raw material combinations and the same type of raw material combinations with different proportions can produce concrete with different quality, so that high-quality concrete can be obtained by adapting the concrete meeting the requirements without using a raw material adaptation test.

Concrete test room among the prior art can dispose a small-size mixer in a lot and carry out the concrete test, and its raw materials all need dispose, weigh in other places, then pour into the mixer, and concrete raw materials configuration efficiency is not high, and stirring mixing efficiency is also not ideal, and whole mixer clearance is difficult, and it can influence experimental quality to remain concrete raw materials.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a small concrete trial-preparation system for a laboratory, which improves the concrete raw material preparation efficiency and the stirring and mixing efficiency and simultaneously enables a concrete test device to be easy to clean.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a laboratory is with small-size concrete trial-production system, is including being located the preliminary mixing case of base upper end, joining in marriage put platform, pay-off auger and main agitator tank, set up concrete raw materials batching, weigh with joining in marriage the platform in advance agitator tank feed inlet top, the discharge gate of preliminary mixing case and the feed inlet of main agitator tank pass through pay-off auger intercommunication. The concrete raw materials are mixed through the mixing table and then enter the pre-stirring box, and then the main stirring box is carried out through the feeding auger.

The utility model discloses a stirring rod is stirred in advance to the inside of agitator tank in advance sets up the horizontal direction and stirs the pole in advance, stirs the pole for the spiral stirring rod in advance, can make the horizontal stirring of raw materials even, the outside of agitator tank in advance sets up the drive and stirs pole pivoted agitator motor in advance, and the one end of agitator rod passes through shaft coupling fixed connection with agitator motor's output in advance, and agitator motor can drive in advance the agitator rod and rotate, stirs in advance the pole to the inside raw materials of agitator tank in advance.

Furthermore, the configuration platform is fixedly positioned above the pre-stirring box and fixedly connected with the pre-stirring box through screws, the configuration platform is provided with a movable weighing platform, two ends of the weighing platform are provided with sliding blocks, the sliding blocks are matched with horizontal sliding grooves on two sides of the configuration platform, a threaded rod in threaded connection with the sliding blocks is arranged inside each sliding groove, the threaded rod is rotatably connected with the configuration platform, one end of the configuration platform is provided with a weighing motor for driving the threaded rod to rotate, and the weighing motor can drive the threaded rod to rotate so that the sliding blocks slide to control the position of the weighing platform.

Furthermore, the weighing platform is provided with at least one weighing body, the weighing body can be a common platform scale in the prior art, bottomless charging barrels are fixedly arranged above the weighing platform, the number of the charging barrels corresponds to that of the weighing bodies, the bottom of each charging barrel corresponds to an object placing table board on the upper portion of the weighing body, when the weighing bodies are located at the bottom of each charging barrel, the weighing bodies can cover the bottom of each charging barrel, powder and aggregate can be placed in each charging barrel, and the weighing bodies can weigh the weight of the powder and the aggregate in each charging barrel.

Preferably, the bottom of the charging barrel and the object placing table-board of the weighing body are arranged in parallel, and a gap exists in the vertical direction, wherein the gap is 2mm-5mm, so that the bottom of the charging barrel and the object placing table-board of the weighing body are prevented from being scratched, and the situation that the raw materials slip out of the gap is reduced.

Further, one side of agitator tank in advance is fixed to be set up the inlet tube, sets up solitary flowmeter on the inlet tube, can be used to the measurement and get into the water yield of agitator tank in advance and wash the agitator tank in advance.

Preferably, one side of the weighing platform, which is close to the charging barrel, is provided with a sponge brush body, the upper surface of the sponge brush body and the lower surface of the charging barrel are positioned on the same horizontal plane, the sponge brush body can brush off adhesion at the bottom of the charging barrel, and the bottom of the charging barrel and an object placing table top of the weighing body are prevented from being scratched and rubbed.

Furthermore, a feed switch component is arranged at a discharge port of the pre-stirring box and a feed port of the feed auger, and the feed switch component can open or close a channel between the pre-stirring box and the feed auger to control the pre-stirring time and the feed time.

Specifically, the feeding switch component comprises a clamping seat, a rotary rod, a clamping block, a connecting rod, a baffle and a handle, wherein the clamping seat is provided with two clamping positions which are matched with the clamping block at the upper part and the lower part, the upper end of the clamping block is fixedly connected with the rotary rod, the rotary rod is connected with the clamping seat in a sliding mode in the vertical direction, the lower end of the clamping block is rotatably connected with the connecting rod, the lower end of the connecting rod is fixedly connected with the baffle, the baffle is located at a discharge port of the pre-stirring box and corresponds to the discharge section of the pre-stirring box, and the baffle is located at a channel.

When the clamping block is positioned in the upper clamping position, the baffle leaves a channel between the pre-stirring box and the feeding auger, the channel between the pre-stirring box and the feeding auger is opened, when the clamping block is positioned in the lower clamping position, the baffle is positioned in the channel between the pre-stirring box and the feeding auger, and the channel between the pre-stirring box and the feeding auger is closed.

Furthermore, the cross section of the fixture block is rectangular, the cross section of each clamping position is a circular surface with the diameter size larger than the size of the long edge of the fixture block, a rectangular channel capable of accommodating the fixture block to pass through is arranged between the upper clamping position and the lower clamping position, and the width of the cross section of the channel is smaller than the length of the long edge of the fixture block; when the fixture block needs to be moved, the long edge of the fixture block is parallel to the long edge of the channel, and when the fixture block is located at the clamping position, the rotating rod is rotated, so that the short edge of the fixture block is parallel to the long edge of the channel.

Preferably, the upper end of the rotating rod can be provided with a handle, so that the baffle can be conveniently pulled.

Preferably, the discharge gate of pay-off auger sets up the auger water inlet, the discharge gate of agitator tank and the feed inlet of pay-off auger set up the delivery port in advance, be convenient for pay-off auger and the washing of agitator tank in advance.

Further, the inside of main agitator tank sets up main puddler, and main puddler is the spiral puddler, can carry out abundant even stirring to the raw materials of main agitator tank inside upper and lower part, and the discharge gate of main agitator tank sets up in the bottom of main agitator tank.

Further, an auxiliary material feeding assembly is arranged above the main stirring box and comprises an additive barrel and a liquid barrel, discharge ports of the additive barrel and the liquid barrel and an auxiliary material feed port in the upper end of the main stirring box are respectively connected with an auxiliary material inlet in the upper end of the main stirring box, an additive buffer tank is arranged below the additive barrel, an electric control valve is arranged between the additive barrel and the additive buffer tank, an electric control valve is also arranged at an outlet of the additive buffer tank, and scales are arranged on the additive buffer tank to facilitate adjustment of the addition amount of the additive; the below of liquid bucket sets up the liquid buffer tank, sets up automatically controlled valve between liquid bucket and the liquid buffer tank, and the discharge gate of liquid buffer tank also sets up automatically controlled valve, set up the scale on the liquid buffer tank, the convenient addition of adjusting liquid.

Preferably, a product box is arranged below a discharge port of the main stirring box and used for containing test finished products, and the product box is connected with the base in a sliding manner, can be pulled and is convenient for taking out the test finished products

Preferably, the feed inlet of the main stirring box is provided with a water inlet of the main stirring box, so that the main stirring box can be conveniently added with water and cleaned.

Preferably, the trial-assembly system can be provided with a pressure water inlet nozzle for cleaning, and the pressure water inlet nozzle is arranged at the water inlet of the main stirring box and used for cleaning the main stirring box.

Preferably, the lower end of the base of the system is provided with a roller, so that the whole system can move conveniently.

Preferably, the test system is also provided with a mud-stone mortar and water separation tank and a filtrate neutralization box for post-filtration and treatment of test products.

The invention has the beneficial effects that:

1. this small-size concrete trial system can be used to laboratory adaptation concrete, and the platform of joining in marriage can weigh the raw materials with the feed cylinder cooperation, conveniently obtains anticipated proportion raw materials, improves the efficiency of concrete configuration.

2. This small-size concrete trial system of concrete sets up preliminary mixing and the dual stirring of main stirring, sets up preliminary mixing before raw materials main stirring, can improve the speed of concrete mixing, and the configuration is efficient.

3. This small-size concrete trial system's of concrete feed cylinder, preliminary mixing case, pay-off auger and main agitator tank all can be very convenient must wash, reduce remaining of the inside former adaptation raw materials of system, promote the configuration degree of accuracy, and entire system must clear up conveniently, and the function is practical.

Drawings

FIG. 1 is a schematic structural diagram of the whole small-sized concrete trial system;

FIG. 2 is a schematic structural diagram of a pre-mixing box of the small concrete test-matching system;

FIG. 3 is a schematic top view of the small concrete test system configuration table;

FIG. 4 is a schematic structural view of a feeding switch assembly of the small concrete trial system;

FIG. 5 is a schematic structural view of a top view of a clamp on a feeding switch assembly of the small concrete trial system;

FIG. 6 is a schematic structural view of an auxiliary material feeding assembly in the small concrete test system.

In the figure: 1. a pre-stirring tank; 2. a placement table; 3. feeding flood dragon; 4. a main stirring tank; 5. a product box; 6. a feed switch assembly; 7. a charging barrel; 8. a support; 9. a base; 10. a roller; 11. a stirring rod; 12. a pre-stirring motor; 13. a water outlet; 14. a water inlet pipe; 15. an additive barrel; 16. a liquid barrel; 17. a sedimentation tank; 18. a neutralization tank; 21. a weighing platform; 22. weighing a body; 23. a slider; 24. a threaded rod; 25. a weighing motor; 31. a water inlet of the packing auger; 41. a main stirring rod; 42. a water inlet of the main stirring tank; 43. an auxiliary material inlet; 61. a card holder; 62. rotating the rod; 63. a clamping block; 64. connecting rods, 65 and baffles; 66. a handle; 151. an additive buffer tank; 161. and a liquid buffer tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1, a laboratory is with small-size concrete system of trying on match, including being located the preliminary mixing case 1 of base 9 upper end, configuration platform 2, pay-off auger 3 and main agitator tank 4, set up concrete raw materials batching above the 1 feed inlet of preliminary mixing case and use configuration platform 2, the discharge gate of preliminary mixing case 1 and the feed inlet of main agitator tank 4 pass through pay-off auger 3 and communicate. The concrete raw material is mixed through the mixing table 2 and then enters the pre-stirring box 1, and then the main stirring box 4 is carried out through the feeding auger 3.

Specifically, refer to fig. 2, the inside of agitator tank 1 sets up horizontal direction in advance puddler 11, and puddler 11 is the spiral stirring rod in advance, can make the horizontal stirring of raw materials even, agitator tank 1's outside sets up the drive in advance puddler 11 pivoted in advance agitator motor 12, and shaft coupling fixed connection is passed through with agitator motor 12's output in advance to the one end of agitator rod 11 in advance, and agitator motor 12 can drive in advance puddler 11 and rotate, and agitator rod 11 stirs in advance to the raw materials of agitator tank 1 inside in advance.

Further, referring to fig. 3, the configuration table 2 is fixedly positioned above the pre-stirring tank 1, the configuration table 2 is fixedly connected with the pre-stirring tank 1 through screws, the configuration table 2 is provided with a movable weighing table 21, two ends of the weighing table 21 are provided with sliders 23, the sliders 23 are matched with horizontal sliding grooves on two sides of the configuration table 2, a threaded rod 24 in threaded connection with the sliders 23 is arranged inside the sliding grooves, the threaded rod 24 is rotatably connected with the configuration table 2, one end of the configuration table 2 is provided with a weighing motor 25 for driving the threaded rod 24 to rotate, and the weighing motor 25 can drive the threaded rod 24 to rotate, so that the sliders 23 slide to control the position of the weighing table 21.

Further, referring to fig. 3, the weighing platform 21 is provided with three weighing bodies 22, so that a plurality of raw materials can be weighed simultaneously, the weighing bodies 22 are common platform scales in the prior art, a bottomless material cylinder 7 is fixedly arranged above the weighing platform 21, and the bottom of the material cylinder 7 corresponds to an object placing platform at the upper part of the weighing bodies 22. The charging barrel 7 is divided into a powder barrel and an aggregate barrel, 4-6 powder barrels with the capacity of 30 liters and 3-5 aggregate barrels with the capacity of 50 liters are arranged in the embodiment, and powder and aggregate are pre-stirred.

Before and after the batching, the weighing body 22 is not positioned at the bottom of the charging barrel 7, when the raw materials need to be configured, the weighing motor 25 is turned on, the weighing motor 25 can drive the threaded rod 24 to rotate so as to control the position of the weighing platform 21, when the weighing body 22 is positioned at the bottom of the charging barrel 7, the weighing body 22 can cover the bottom of the charging barrel 7, powder and aggregate are added into the charging barrel 7, and the weighing body 22 can weigh the weight of the powder and the aggregate in the charging barrel 7.

Further, there is a clearance in the bottom of feed cylinder 7 and the object placing table face parallel arrangement of title body 22 and vertical direction again, the clearance is 3mm, avoids the bottom of feed cylinder 7 and the object placing table face of title body 22 to cut and rub, reduces the situation that the raw materials ran out from the clearance simultaneously.

Further, one side of the pre-stirring tank 1 is fixedly provided with a water inlet pipe 14, and the water inlet pipe 14 is provided with an independent flowmeter which can be used for metering the water quantity entering the pre-stirring tank 1 and cleaning the pre-stirring tank 1.

Further, one side of the weighing platform 21 close to the material cylinder 7 is provided with a sponge brush body 26, the upper surface of the sponge brush body 26 and the lower surface of the material cylinder 7 are located on the same horizontal plane, the sponge brush body 26 can brush off adhesion at the bottom of the material cylinder 7, and the bottom of the material cylinder 7 and an object placing table top of the weighing body 2 are prevented from being scratched.

Further, referring to fig. 2, a feed switch assembly 6 is arranged at a discharge port of the pre-stirring box 1 and a feed port of the feed auger 3, and the feed switch assembly 6 can open or close a channel between the pre-stirring box 1 and the feed auger 3 to control the pre-stirring time and the feed time.

Specifically, referring to fig. 4 and 5, the feeding switch assembly 6 includes a clamping seat 61, a rotating rod 62, a clamping block 63, a connecting rod 64, a baffle 65 and a handle 66, the clamping seat 61 is provided with two clamping positions on the upper portion and the lower portion, which are matched with the clamping block 63, the upper end of the clamping block 63 is fixedly connected with the rotating rod 62, the rotating rod 62 is slidably connected with the clamping seat 61 in the vertical direction, the lower end of the clamping block 63 is rotatably connected with the connecting rod 64, the lower end of the connecting rod 64 is fixedly connected with the baffle 65, the baffle 65 is located at a discharge port of the pre-stirring box 1 and corresponds to a discharge cross section of the pre-stirring box 1, and the baffle 65 is located at a passage between the pre.

When the clamping block 63 is located at the upper clamping position, the baffle 65 leaves a channel between the pre-stirring box 1 and the feeding auger 3, the channel between the pre-stirring box 1 and the feeding auger 3 is opened, when the clamping block 63 is located at the lower clamping position, the baffle 65 is located at the channel between the pre-stirring box 1 and the feeding auger 3, and the channel between the pre-stirring box 1 and the feeding auger 3 is closed.

Furthermore, the cross section of the fixture block 63 is rectangular, the cross section of each clamping position is a circular surface with the diameter size larger than the size of the long side of the fixture block 63, a rectangular channel capable of accommodating the fixture block 63 to pass through is arranged between the upper clamping position and the lower clamping position, and the width of the cross section of the channel is smaller than the length of the long side of the fixture block 63; when the latch 63 needs to be moved, the long side of the latch 63 is parallel to the long side of the channel, and when the latch 63 is located at the position-locking position, the rotating rod 62 is rotated to make the short side of the latch 63 parallel to the long side of the channel.

Further, a handle 66 may be disposed at the upper end of the rotating rod 62 to facilitate pulling the baffle 65.

Further, the discharge gate of pay-off auger 3 sets up auger water inlet 31, the discharge gate of agitator tank 1 in advance sets up delivery port 13 with the feed inlet of pay-off auger 3, is convenient for pay-off auger 3 and the washing of agitator tank 1 in advance.

Further, referring to fig. 6, an auxiliary material feeding assembly is arranged above the main stirring box 4, the auxiliary material feeding assembly comprises an additive barrel 15 and a liquid barrel 16, discharge ports of the additive barrel 15 and the liquid barrel 16 and an auxiliary material feeding port 43 at the upper end of the main stirring box 4, an additive buffer tank 151 is arranged below the additive barrel 15, an electric control valve is arranged between the additive barrel 15 and the additive buffer tank 151, an electric control valve is also arranged at an outlet of the additive buffer tank 151, and scales are arranged on the additive buffer tank 151, so that the additive amount of the additive can be conveniently adjusted; the below of liquid bucket 16 sets up liquid buffer tank 161, sets up electric control valve between liquid bucket 16 and the liquid buffer tank 161, and the discharge gate of liquid buffer tank 161 also sets up electric control valve, set up the scale on the liquid buffer tank 161, conveniently adjust the addition of liquid.

In this embodiment, the capacity of the liquid tank 16 is 50 liters, and the capacity of the liquid buffer tank 161 is 2 liters; the additive barrel 15 had a capacity of 10 liters in number of two and the additive surge tank 151 had a capacity of 1 liter.

Further, the whole 45 slope settings of main agitator tank 4, the inside of main agitator tank 4 sets up main puddler 41, and main puddler 41 is the spiral puddler, can carry out abundant even stirring to the raw materials of the inside upper and lower part of main agitator tank 4, and the discharge gate of main agitator tank 4 sets up in the bottom of main agitator tank 4, and the below of the discharge gate of main agitator tank 4 sets up product box 5, and product box 5 is used for the experimental finished product of splendid attire, product box 5 and base 9 sliding connection, but the pull, the experimental finished product of being convenient for takes out.

Furthermore, a main stirring box water inlet 42 is formed in a feeding hole of the main stirring box 4, so that water adding and cleaning of the main stirring box are facilitated. This trial-distribution system can dispose and wash with taking pressure water injection nozzle, takes pressure water injection nozzle to set up in 4 water inlets of main agitator tank, improves the cleaning efficiency of main agitator tank 4.

Further, the test system is also provided with a mud-stone mortar and water separation tank 17 and a clear filtrate neutralization tank 18 for post-filtration and treatment of test products.

Further, the lower end of the base 9 of the system is provided with a roller 10 to facilitate the movement of the whole system, and conceivably, the base 9 is provided with a stopper, not shown, for fixing the position of the system.

The use flow of the small concrete trial system in the embodiment is as follows: in a shutdown state or after the batching is finished, the weighing body 22 is not positioned at the bottom of the charging barrel 7; when raw materials need to be configured, firstly, a weighing motor 25 is turned on, the weighing motor 25 drives a threaded rod 24 to rotate so as to control the position of a weighing platform 21, when a scale body 22 is positioned at the bottom of a charging barrel 7, the scale body 22 covers the bottom of the charging barrel 7, aggregate and powder are added into the charging barrel 7, the scale body 22 can weigh the weight of the raw materials in the charging barrel 7, after the materials are prepared, the weighing motor 25 is turned on, the position of the weighing platform 21 is adjusted and controlled, when the scale body 22 leaves the bottom of the charging barrel 7, the raw materials enter a pre-stirring box 1, a pre-stirring motor 12 is turned on to pre-stir the aggregate and the powder, the pre-stirring time is controlled through a feeding switch assembly 6, when the pre-stirring is completed, a feeding motor and a main stirring motor of a feeding auger 3 are turned on, the mixed raw materials enter a main stirring box 4, additives and liquid are added into the main stirring box 4, and after, into the interior of the product bin 5.

In this embodiment, the weighing motor 25, the pre-stirring motor 12, the feeding motor and the main stirring motor are manually controlled or controlled by a controller. When the controller is used for controlling, the feeding switch assembly 6 is set to be an electric control switch, the controller is connected with the weighing motor 25, the pre-stirring motor 12, the feeding motor, the main stirring motor, the electric control valve and the electric control switch, and the controller can control the addition amount of raw materials, the pre-stirring time, the feeding efficiency and the main stirring time, so that automatic trial assembly of concrete is realized.

This small-size concrete of concrete trial system stirs case 1 and main agitator tank 4 in advance and also can work simultaneously according to the demand.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A small-sized concrete trial-mix system for a laboratory is characterized by comprising a pre-mixing box (1), a configuration platform (2), a feeding auger (3) and a main mixing box (4), wherein the configuration platform (2) for mixing concrete raw materials is arranged above a feed inlet of the pre-mixing box (1), and a discharge outlet of the pre-mixing box (1) is communicated with a feed inlet of the main mixing box (4) through the feeding auger (3);

a movable weighing platform (21) is arranged on the configuration platform (2), at least one weighing body (22) is arranged on the weighing platform (21), a bottomless charging barrel (7) is fixedly arranged above the weighing platform (21), and the bottom of the charging barrel (7) corresponds to an object placing platform surface on the upper portion of the weighing body (22).

The auxiliary material feeding assembly is arranged above the main stirring box (4) and comprises an additive barrel (15) and a liquid barrel (16), and discharge ports of the additive barrel (15) and the liquid barrel (16) are connected with an auxiliary material feeding port (43) at the upper end of the main stirring box (4).

2. The small-sized concrete trial system for the laboratory according to claim 1, wherein two ends of the weighing platform (21) are provided with sliding blocks (23), the sliding blocks (23) are matched with horizontal sliding grooves on two sides of the configuration platform (2), a threaded rod (24) in threaded connection with the sliding blocks (23) is arranged in the sliding grooves, the threaded rod (24) is in rotary connection with the configuration platform (2), and one end of the configuration platform (2) is provided with a weighing motor (25) for driving the threaded rod (24) to rotate.

3. The small-sized concrete trial system for the laboratory according to claim 1 or 2, wherein the bottom of the charging barrel (7) is arranged in parallel with the object placing table of the balance body (2) and a gap exists in the vertical direction, and the gap is 2mm-5 mm.

4. The small-sized concrete trial system for the laboratory according to claim 3, wherein a sponge brush body (26) is arranged on one side of the weighing platform (21) close to the charging barrel (7), and the upper surface of the sponge brush body (26) and the lower surface of the charging barrel (7) are positioned on the same horizontal plane.

5. The small-sized concrete trial system for the laboratory according to claim 1, wherein a feeding switch assembly (6) for controlling feeding time is arranged at a discharge port of the pre-stirring box (1) and a feed port of the feeding auger (3).

6. The small-sized concrete trial-batching system for the laboratory according to claim 5, wherein the feeding switch assembly (6) comprises a clamping seat (61), a rotating rod (62), a clamping block (63), a connecting rod (64), a baffle (65) and a handle (66), the clamping seat (61) is provided with two clamping positions which are matched with the clamping block (63) at the upper part and the lower part, the rotating rod (62) is fixedly connected to the upper end of the clamping block (63), the rotating rod (62) is slidably connected with the clamping seat (61), the connecting rod (64) is rotatably connected to the lower end of the clamping block (63), the baffle (65) is fixedly connected to the lower end of the connecting rod (64), and the baffle (65) is located at the discharge hole of the pre-stirring box (1) and corresponds to the discharge section of the pre-stirring box (1).

7. The small-sized concrete trial system for the laboratory according to claim 6, wherein the cross section of the clamping block (63) is rectangular, the cross section of the clamping position is a circular surface with a diameter size larger than the long side size of the clamping block (63), a channel capable of accommodating the clamping block (63) is arranged between the upper clamping position and the lower clamping position, and the width of the cross section of the channel is smaller than the length of the long side of the clamping block (63).

8. The small-sized concrete trial-batching system for the laboratory according to claim 1, wherein a screw inlet (31) is arranged at a discharge port of the feeding screw (3), and a water outlet (13) is arranged at a discharge port of the pre-stirring box (1) and a feed port of the feeding screw (3).

9. The small concrete trial system for the laboratory according to claim 1, wherein the feed inlet of the main mixing box (4) is provided with a main mixing box water inlet (42).

10. The small-sized concrete trial system for the laboratory according to claim 1, wherein an additive buffer tank (151) is arranged below the additive barrel (15), and scales are arranged on the additive buffer tank (151);

a liquid buffer tank (161) is arranged below the liquid barrel (16), and scales are arranged on the liquid buffer tank (161).