Large-flow-state concrete segregation rate test equipment

Abstract

The utility model discloses large-flow concrete segregation rate test equipment, which comprises a rack, a sieve shaker and a jumping table, the rack comprises a base, a sliding trolley and a lead screw lifting mechanism, the sieve shaker and the jumping table are respectively arranged on the base, the sliding trolley is arranged in a track of the base, the lead screw lifting mechanism is arranged on the sliding trolley, a clamping mechanism is arranged on the lead screw lifting mechanism, and the jumping table is arranged on the clamping mechanism. The jumping table is provided with a detection cylinder, the detection cylinder comprises a plurality of stacked cylinder bodies, the clamping mechanism is used for clamping the cylinder bodies, the cylinder bodies are provided with driving devices and turning plate assemblies, the turning plate assemblies are located in the cylinder bodies, the driving devices are located outside the cylinder bodies, and the driving devices are connected with the turning plate assemblies. When a concrete sample is screened, each section of the cylinder body of the detection cylinder can be automatically closed by virtue of the turning plate assembly, so that the screw rod lifting mechanism can conveniently move the cylinder body to the vibration screening machine through the clamping mechanism, and in the process, the turning plate assembly can prevent the concrete sample from leaking from the cylinder body.

Description

Technical Field

[0001] The utility model relates to concrete testing equipment, in particular to high-fluidity concrete segregation rate testing equipment. Background Art

[0002] Due to its superior fluidity and construction performance, high-flow concrete has been widely used in various large-scale infrastructure construction. The volume stability of high-flow concrete has always been the focus of industry attention. The volume stability of high-flow concrete refers to its ability to maintain unchanged volume during the hardening process. The segregation rate of concrete is one of the important indicators for evaluating its volume stability.

[0003] Segregation refers to the phenomenon that mortar and aggregate in concrete separate due to differences in density and fluidity of the component particles during transportation, pouring and vibration of concrete. The segregation rate directly reflects the volume stability of concrete.

[0004] When testing the segregation rate of large-flow concrete, the following steps are usually included: preparing the concrete sample, pouring the concrete sample into the test cylinder, vibrating the test cylinder to fully mix the mortar and aggregate in the concrete, simulating the vibration process in actual construction, and finally screening the concrete sample and measuring the mass of wet aggregate in each section of the test cylinder to calculate the segregation rate of the concrete sample.

[0005] However, in actual operation, there is still the problem of inconvenience in using the test cylinder. When measuring the mass of wet aggregate in each section of the test cylinder, the test cylinder needs to be disassembled and the concrete samples in each section need to be handled separately. During this process, the concrete samples are easy to spill, which interferes with the test results. At the same time, due to differences in the operator's skill level, experience or attention, improper operation may occur, thereby affecting the accuracy of the test results. Summary of the Invention

[0006] The purpose of the utility model is to provide a large-flow concrete segregation rate testing device in view of the problems existing in the prior art.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A large-flow concrete segregation rate testing device includes a frame, a vibrating screen and a jump table. The frame includes a base, a sliding trolley and a screw lifting mechanism. The vibrating screen and the jump table are respectively arranged on the base. The sliding trolley is arranged in the track of the base. The screw lifting mechanism is arranged on the sliding trolley. The screw lifting mechanism is provided with a clamping mechanism. A detection cylinder is placed on the jump table. The detection cylinder includes several stacked cylinders. The clamping mechanism is used to clamp the cylinder. A driving device and a flap assembly are provided on the cylinder. The flap assembly is located in the cylinder, and the driving device is located outside the cylinder. The driving device is connected to the flap assembly.

[0009] The utility model can complete the vibration processing and screening of concrete samples by itself, improves the experimental efficiency and avoids the influence of improper operation on the experiment. When screening the slurry and wet aggregate of the concrete sample, the cylinder body of each section of the detection cylinder can be closed by itself with the help of the flap assembly, so that the screw lifting mechanism can move the cylinder body to the vibrating screen through the clamping mechanism. During this process, the flap assembly can prevent the concrete sample from leaking from the cylinder body.

[0010] Preferably, the flap assembly includes a first flap, a second flap and a third flap, the first flap, the second flap and the third flap are respectively rotatably connected to the cylinder, and the second flap and the third flap are respectively provided on both sides of the first flap.

[0011] The first flap, the second flap and the third flap are used together to block the bottom of the cylinder to prevent a single flap from rotating too far, causing the concrete samples in the upper and lower cylinders to be stirred and mixed over a large range, thereby interfering with the experimental results.

[0012] Preferably, the driving device includes a motor, a belt, a driven wheel and a driving wheel, the driving wheel is mounted on the rotating shaft of the first flap, the driven wheel is respectively mounted on the rotating shafts of the second flap and the third flap, the driven wheel and the driving wheel are connected by the belt, and the motor is connected to the rotating shaft of the first flap.

[0013] The motor synchronously drives the first flap, the second flap and the third flap to rotate through the belt, the driven pulley and the driving pulley.

[0014] Preferably, guide columns are provided on both sides of the cylinder, a slide is provided in the middle of the guide column, the slide is parallel to the central axis of the detection cylinder, and a hanging ear is provided on the side of the guide column away from the cylinder.

[0015] Preferably, the jump table and the vibrating screen are respectively provided with limit rods, and the vibrating screen is also provided with a square hole screen. The limit rods on the vibrating screen are located on both sides of the square hole screen, and the limit rods on the jump table are located on both sides of the detection cylinder. The cylinder is slidably connected to the limit rods through the slide.

[0016] The limiting rod can limit the position of the cylinder so that the cylinders can be neatly stacked together to ensure the sealing of the detection cylinder. At the same time, the limiting rod can also enable the cylinder to be accurately placed on the square hole sieve to avoid leakage problems when screening concrete samples.

[0017] Preferably, the screw lifting mechanism includes a support frame, a motor and parallel screws, the motor is connected to the screw, the screw is rotatably connected to the sliding trolley, the support frame is arranged on the base, the top of the support frame is provided with a guide rail, and the base of the motor moves along the guide rail.

[0018] The sliding trolley can drive the screw lifting mechanism to move from the side of the jumping table to the side of the vibrating screen machine.

[0019] Preferably, the clamping mechanism includes an electric push rod and a connecting rod, the electric push rods are respectively provided on both sides of the connecting rod, a nut is provided on the base of the electric push rod, and the nut is connected to the lead screw through a thread.

[0020] Preferably, the distance between the telescopic rods of adjacent electric push rods is not less than the diameter of the cylinder, and the telescopic rods of the electric push rods lift the cylinder through the hanging ears.

[0021] The screw lifting mechanism drives the clamping mechanism to move up and down, so that the clamping mechanism can lift and transport each section of the cylinder in sequence from top to bottom.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model can complete the vibration processing and screening of concrete samples by itself, improves the experimental efficiency and avoids the influence of improper operation on the experiment. When screening the slurry and wet aggregate of the concrete sample, each section of the detection cylinder can be closed by itself with the help of the flap assembly, which makes it convenient for the screw lifting mechanism to move the cylinder to the vibrating screen through the clamping mechanism. During this process, the flap assembly can prevent the concrete sample from leaking from the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model Figure 2;

[0026] Figure 3 This is a schematic structural diagram of the cylinder in the embodiment of the present utility model;

[0027] Figure 4 This is a cross-sectional view of the cylinder when the flap assembly is closed in the embodiment of the present utility model;

[0028] Figure 5 This is a cross-sectional view of the cylinder when the flap assembly is opened in the embodiment of the present utility model;

[0029] Figure 6 This is a structural diagram of the flap assembly in an embodiment of the present utility model;

[0030] In the figure: 1. Base; 101. Track; 2. Vibrating screen; 3. Jump table; 4. Screw lifting mechanism; 401. Guide rail; 5. Clamping mechanism; 501. Telescopic rod; 6. Limit rod; 7. Detection cylinder; 701. Cylinder body; 702. Guide column; 703. Hanging ear; 8. First flap; 9. Second flap; 10. Third flap; 11. Motor; 12. Driven wheel; 13. Driving wheel. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] like Figures 1 to 6 As shown, the specific scheme of the embodiment is as follows: A large-flow concrete segregation rate testing equipment includes a frame, a vibrating screen 2 and a jumping table 3. The frame includes a base 1, a sliding trolley, and a screw lifting mechanism 4. The base 1 is a rectangular frame. An instrument area and a track 101 are provided on the base 1. The track 101 is arranged parallel to the instrument area.

[0034] The vibrating screen machine 2 and the jumping table 3 are respectively arranged in the instrument area. A positioning plate is also provided in the instrument area. Positioning plates are provided on both sides of the vibrating screen machine 2 and the jumping table 3. The positioning plates are slidably connected to the base 1, and the vibrating screen machine 2 and the jumping table 3 are fixed by moving the positioning plates.

[0035] The sliding trolley is arranged in the track 101 of the base 1, and the sliding trolley can move along the track 101. The screw lifting mechanism 4 includes a support frame, a motor 11 and parallel screws. One end of the screw is rotatably connected to the sliding trolley and the other end is connected to the motor 11. The support frame is arranged on the base 1, and a guide rail 401 is provided on the top of the support frame. The guide rail 401 is arranged parallel to the track 101, and the base of the motor 11 moves along the guide rail 401.

[0036] A clamping mechanism 5 is provided on the screw lifting mechanism 4. The clamping mechanism 5 includes an electric push rod and a connecting rod. Electric push rods are provided on both sides of the connecting rod. A nut is provided on the base of the electric push rod. The nut is rotatably connected to the base of the electric push rod, and the nut is connected to the screw through a thread.

[0037] Limit rods 6 are respectively provided on the jumping table 3 and the vibrating screen 2. The vibrating screen 2 is also provided with a square hole screen. The limit rods 6 on the vibrating screen 2 are located on both sides of the square hole screen. A detection cylinder 7 is placed on the jumping table 3. The limit rods 6 on the jumping table 3 are located on both sides of the detection cylinder 7.

[0038] The detection cylinder 7 includes several stacked cylinders 701, on which a driving device and a flip assembly are provided. The flip assembly is located inside the cylinder 701, and the flip assembly is located in the lower half of the cylinder 701. The driving device is located outside the cylinder 701. The flip assembly includes a first flip 8, a second flip 9 and a third flip 10. The second flip 9 and the third flip 10 are respectively provided on both sides of the first flip 8.

[0039] The first flap 8 is rotatably connected to the cylinder 701 via a first rotating shaft, the second flap 9 is rotatably connected to the cylinder 701 via a second rotating shaft, and the third flap 10 is rotatably connected to the cylinder 701 via a third rotating shaft.

[0040] When the flap assembly is in a closed or open state, the first flap 8, the second flap 9 and the third flap 10 are parallel to each other.

[0041] The driving device includes a motor 11, a belt, a driven wheel 12 and a driving wheel 13. The driving wheel 13 is mounted on the first rotating shaft, and the driven wheel 12 is mounted on the second rotating shaft and the third rotating shaft respectively. The driven wheel 12 and the driving wheel 13 are connected by a belt. The motor 11 is connected to the first rotating shaft. When the motor 11 drives the first rotating shaft to rotate clockwise, the second rotating shaft and the third rotating shaft will both rotate clockwise, causing the flap assembly to open.

[0042] Guide columns 702 are provided on both sides of the cylinder 701, and a slide is provided in the middle of the guide column 702, which is parallel to the central axis of the detection cylinder 7. The cylinder 701 is slidably connected to the limit rod 6 through the slide. The guide column 702 is provided with a hanging ear 703 on the side away from the cylinder 701.

[0043] The distance between the telescopic rods 501 of adjacent electric push rods is not less than the diameter of the cylinder 701 , and the telescopic rods 501 of the electric push rods lift the cylinder 701 through the hanging ears 703 .

[0044] The working method of this embodiment is as follows: prepare a large flowable concrete sample according to the standard method and ensure its uniformity and consistency.

[0045] Close the flap assembly at the bottom of the detection cylinder 7 , open the remaining flap assemblies of the detection cylinder 7 , and pour the concrete sample into the detection cylinder 7 to ensure that the concrete sample fills the detection cylinder 7 .

[0046] The motor 11 of the jumping table 3 is started to vibrate the concrete sample in the detection tube 7 so that the mortar and aggregate in the concrete are fully mixed, simulating the vibration process in actual construction.

[0047] Turn off the motor 11 and all the flap assemblies of the jumping table 3, start the clamping mechanism 5, and make the telescopic rod 501 of the electric push rod extend under the hanging ear 703 of the top cylinder 701 of the detection cylinder 7. Start the screw lifting mechanism 4, lift the top cylinder 701 of the detection cylinder 7, and make the cylinder 701 disengage from the limit rod 6 on the jumping table 3. Start the sliding trolley to move the cylinder 701 above the square hole sieve, then lower the cylinder 701 so that the cylinder 701 is sleeved on the limit rod 6 of the vibrating screen 2, open the flap assembly of the cylinder 701, and make the concrete sample therein fall into the square hole sieve. Start the vibrating screen 2 to screen out the wet aggregate, then lift the cylinder 701, and the staff will take out the square hole sieve and weigh the wet aggregate using an electronic balance.

[0048] According to the above steps, the wet aggregate of the concrete sample in each cylinder 701 is weighed from top to bottom, and the segregation rate is calculated according to the mass of the wet aggregate in different cylinders 701. The lower the segregation rate, the better the volume stability of the concrete.

[0049] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-flow concrete segregation rate test equipment, including a frame, a vibrating screen and a jumping table, characterized in that: The frame includes a base, a sliding trolley, and a screw lifting mechanism. The vibrating screen and the jump table are respectively arranged on the base. The sliding trolley is arranged in the track of the base. The screw lifting mechanism is arranged on the sliding trolley. A clamping mechanism is provided on the screw lifting mechanism. A detection cylinder is placed on the jump table. The detection cylinder includes several stacked cylinders. The clamping mechanism is used to clamp the cylinder. A driving device and a flap assembly are provided on the cylinder. The flap assembly is located in the cylinder. The driving device is located outside the cylinder. The driving device is connected to the flap assembly.

2. A high-flow concrete segregation rate testing device according to claim 1, characterized in that: The flap assembly includes a first flap, a second flap and a third flap. The first flap, the second flap and the third flap are respectively rotatably connected to the cylinder. The second flap and the third flap are respectively provided on both sides of the first flap.

3. A high-flow concrete segregation rate testing device according to claim 2, characterized in that: The driving device includes a motor, a belt, a driven wheel and a driving wheel. The driving wheel is mounted on the rotating shaft of the first flap, and the driven wheels are respectively mounted on the rotating shafts of the second flap and the third flap. The driven wheel and the driving wheel are connected by the belt, and the motor is connected to the rotating shaft of the first flap.

4. The high-flow concrete segregation rate testing equipment according to claim 1, characterized in that: Guide columns are respectively provided on both sides of the cylinder, a slideway is provided in the middle of the guide column, and the slideway is parallel to the central axis of the detection cylinder. A hanging ear is provided on the side of the guide column away from the cylinder.

5. The high-flow concrete segregation rate testing equipment according to claim 4, characterized in that: The jump table and the vibrating screen are respectively provided with limit rods, and the vibrating screen is also provided with a square hole screen. The limit rods on the vibrating screen are located on both sides of the square hole screen, and the limit rods on the jump table are located on both sides of the detection cylinder. The cylinder is slidably connected to the limit rods through the slide.

6. The high-flow concrete segregation rate testing equipment according to claim 1, characterized in that: The screw lifting mechanism includes a support frame, a motor and parallel screws, the motor is connected to the screw, the screw is rotatably connected to the sliding trolley, the support frame is arranged on the base, the top of the support frame is provided with a guide rail, and the base of the motor moves along the guide rail.

7. The high-flow concrete segregation rate testing equipment according to claim 6, characterized in that: The clamping mechanism includes an electric push rod and a connecting rod. The electric push rods are respectively provided on both sides of the connecting rod. A nut is provided on the base of the electric push rod. The nut is connected to the lead screw through a thread.

8. The high-flow concrete segregation rate testing equipment according to claim 7, characterized in that: The distance between the telescopic rods of adjacent electric push rods is not less than the diameter of the cylinder, and the telescopic rods of the electric push rods lift the cylinder through the hanging ears.

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