Machine-made sand concrete flowing property detection device

Abstract

The utility model discloses a machine-made sand concrete flowing property detection device, which comprises a fixed bottom plate and a spray washing mechanism, the fixed bottom plate is provided with a lifting mechanism and a mounting turntable, the lifting mechanism is provided with a rotary viscometer, the bottom end of the rotary viscometer is provided with a stirring blade, and the mounting turntable is provided with a water inlet and a water outlet. A plurality of rollers are arranged on the bottom surface of the mounting turntable, a circular track matched with the rollers is arranged on the top surface of the fixed bottom plate, a plurality of mortar containers are arranged on the top surface of the mounting turntable along the circumferential direction, feed ports are formed in the tops of the mortar containers, and the positions of the feed ports correspond to those of the rotational viscometers; a discharging port is formed in the bottom of the mortar container, a control valve is arranged at the discharging port, the spraying and flushing mechanism comprises a water pipe, a spraying head is arranged at an opening of the water pipe, and a spraying valve is arranged at the spraying head; the device has the advantages of being reliable in test, convenient to operate and high in efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete flowability testing, and in particular relates to a device for testing the flowability of machine-made sand concrete. Background Art

[0002] With the rapid development of the economy, the consumption of raw materials for concrete is huge. Using machine-made sand to replace natural sand as construction sand has become an important cost-reduction and efficiency-enhancing technical means to solve the problem of increasingly depleted sand and gravel resources and rising prices. Machine-made sand is made from crushed stone by mechanical crushing. In the production process, some fine stone powder and mud powder with a particle size of ≤0.75μm will inevitably be mixed in. The machine-made sand concrete prepared in this way has a large adsorption capacity for polycarboxylate water reducer, and its fluidity is prone to a sharp decline during transportation. The fluidity loss value is high when leaving the factory and on-site construction, which will lead to poor construction pumpability, easy to cause pipe blockage and segregation, and ultimately cause a significant reduction in concrete strength, large shrinkage, early cracking, and poor durability.

[0003] Concrete is a mixed slurry material composed of cementitious materials, sand and gravel, water and admixtures. The flowability of concrete is related to the viscosity of the slurry. The higher the viscosity, the stronger the interaction between molecules and the more difficult it is to flow. Based on Newton's law of fluid mechanics, the flowability can be determined by measuring the stirring resistance of the concrete mixture. In the actual production process of concrete, the existing technology usually judges the loss of flowability of concrete by sampling the mixed concrete, placing it in a plastic bucket for 1 hour, stirring it with a shovel and judging it based on experience. The test results are highly subjective, require special personnel to watch, and are prone to confusion when the production task is large. In addition, most of the concrete after the test is directly discarded, which is easy to cause environmental pollution and waste of resources.

[0004] A rotational viscometer is an instrument used to measure the viscosity and fluidity of liquids. The basic working principle is to use rotational motion and shear force to simulate the flow behavior of liquids or semi-solid substances under different conditions. During the test, the liquid or semi-solid substance is placed in a cylindrical container, and then shear force is applied by rotating the measuring head to cause the sample to shear and flow in the container. In this process, the measuring head can measure the resistance, distortion and deformation of the sample, and thus calculate the viscosity of the substance.

[0005] The problem with the existing technology is that the detection and treatment of the flow performance and loss of traditional machine-made sand concrete mainly rely on subjective judgment, and the test reliability is insufficient; it mainly relies on manual operation, which is inconvenient and inefficient; the concrete after detection is directly discarded, which easily leads to waste. Summary of the invention

[0006] The utility model aims to provide a device for detecting the flow performance of machine-made sand concrete in view of the problems existing in the prior art, which has the advantages of reliable testing, convenient operation and high efficiency.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a device for detecting the flow properties of machine-made sand concrete, comprising a fixed bottom plate and a spray flushing mechanism, a lifting mechanism and a mounting turntable are arranged on the fixed bottom plate, a rotational viscometer is arranged on the lifting mechanism, a stirring blade is arranged at the bottom end of the rotational viscometer, a plurality of rollers are arranged on the bottom surface of the mounting turntable, a circular track for cooperating with the rollers is arranged on the top surface of the mounting turntable, a plurality of mortar containers are arranged along the circumferential direction on the top surface of the mounting turntable, a feed port is provided on the top of the mortar container, the position of the feed port corresponds to the rotational viscometer, a discharge port is provided on the bottom of the mortar container, a control valve is arranged at the discharge port, the spray flushing mechanism comprises a water pipe, a spray head is provided at the mouth of the water pipe, and a spray valve is arranged at the spray head.

[0008] In the above scheme, the lifting mechanism and the mounting turntable are connected and positioned by fixing the bottom plate, the lifting mechanism is used to drive the rotary viscometer to rise and fall, so that the stirring blades are inserted into and taken out of the mortar container, to realize the viscosity test of the mortar and to facilitate the movement of the mortar container, the roller at the bottom of the mounting turntable is used to cooperate with the circular track, so as to realize the rotatable connection of the mounting turntable, and by rotating the mounting turntable, different mortar containers can be moved to the lower side of the rotary viscometer for viscosity test, and the mortar container that needs to be left still after the concrete is placed can be removed, the feed port can be used to add concrete and insert the stirring blades, the control valve is used to control the switch of the discharge port, and the tested concrete can be discharged through the discharge port, the water pipe of the spray flushing mechanism is used to transmit high-pressure water to the spray head for spraying, and the inside of the mortar container is flushed after the test is completed, which is convenient for discharging concrete and subsequent testing, the spray valve can control the spray switch, and the water pipe is connected to the high-pressure water source.

[0009] Furthermore, an elastic limiting member is arranged on the fixed bottom plate, and a plurality of positioning structures for engaging with the elastic limiting member are arranged on the outer ring of the mounting turntable.

[0010] The elastic limiter is engaged with the positioning structure of the outer ring of the mounting turntable to temporarily position the angle of the mounting turntable, so that the relative positions of the rotary viscometer and the mortar container remain consistent each time the work is carried out, thereby ensuring the test effect.

[0011] Furthermore, the elastic limiting member includes a mounting seat, a telescopic rod in a horizontal direction is arranged on the mounting seat, a roller is arranged at the end of the telescopic rod, and the positioning structure includes an arc groove.

[0012] The telescopic rod is connected and positioned through the mounting seat so that the roller can be telescopically moved in the horizontal direction. When the arc groove corresponds to the position of the roller, the roller extends out and is engaged in the arc groove, and the mortar container is directly below the rotational viscometer.

[0013] Furthermore, a discharge pipe is provided at the bottom of the mortar container, a discharge port is provided at the bottom end of the discharge pipe, and a vibrating screen is provided at the discharge port.

[0014] The mortar is centrally guided through the discharge pipe, so that the mortar flows out from the discharge port to the vibrating screen, and the concrete is screened by the vibrating screen, and the aggregate is recycled and reused.

[0015] Furthermore, the lifting mechanism includes a connecting part, a motor is arranged in the connecting part, the motor is rotatably connected to a screw rod, a guide rail seat is arranged on the top of the connecting part, the screw rod is rotatably connected to the guide rail seat, the rotational viscometer is connected to a mounting part, the mounting part is slidably connected to the guide rail seat, and the mounting part is threadedly connected to the screw rod.

[0016] The connecting part is used to support and position the guide rail seat and the motor. The motor drives the screw rod to rotate, and then drives the installation part to achieve lifting. The guide rail seat is provided with a linear slide rail to slide with the installation part, so that the lifting and moving of the installation part is stable.

[0017] Furthermore, a positioning piece is provided on the connecting portion, and the positioning piece is detachably connected to the sprinkler head.

[0018] A positioning piece is provided to detachably cooperate with the sprinkler head, so as to facilitate temporary fixation of the sprinkler head.

[0019] Working principle: When testing fluidity, you only need to pour concrete into the mortar container, rotate the corresponding container to the lower side of the rotational viscometer, control the lifting mechanism to move the stirring blade down to the inside of the concrete, and the rotational viscometer can work to test the fluidity. After the test, lift the rotational viscometer out of the mortar container and test the next sample. When testing the fluidity loss value, on the basis of testing the fluidity, after the sample has been allowed to stand for a set time, repeat the fluidity test on the sample, and the fluidity loss value can be calculated based on the fluidity values ​​before and after. During the standing process, the viscometer can continue to test other samples, and the equipment utilization rate is high.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. By setting up a lifting mechanism to drive the rotary viscometer to rise and fall, and installing a turntable to drive the mortar container to rotate, it can realize the sampling test of large-scale and multi-batch concrete production, which is easy to operate and has high testing efficiency;

[0022] 2. The viscosity and flow properties of concrete in the mortar container are tested by a rotational viscometer, which replaces the judgment of the human supervisor. The test results are reliable and convenient for observation and identification. The mortar container and the rotational viscometer are aligned by elastic limiters to ensure the consistency of the test and make the test results reliable.

[0023] 3. By setting up a spray flushing mechanism, the tested concrete is flushed and discharged, which is convenient for subsequent testing, easy to operate and high in work efficiency;

[0024] 4. After the test is completed, the waste slurry can be screened through a vibrating screen to achieve aggregate recycling, which is green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of a device for detecting the flow properties of machine-made sand concrete according to embodiment 1 of the utility model is shown in FIG. Figure 1 ;

[0026] Figure 2 The structure of a device for detecting the flow properties of machine-made sand concrete according to embodiment 1 of the utility model is shown in FIG. Figure 2 ;

[0027] Figure 3 This is a structural connection diagram of the drum in Example 1 of the utility model;

[0028] Figure 4 This is a structural stereogram of a device for detecting the flow properties of machine-made sand concrete according to Embodiment 2 of the utility model;

[0029] In the figure: 1. Fixed bottom plate; 2. Mounting turntable; 3. Roller; 4. Rotary viscometer; 5. Stirring blade; 6. Circular track; 7. Mortar container; 8. Feed inlet; 9. Discharge outlet; 10. Control valve; 11. Water pipe; 12. Sprinkler head; 13. Spray valve; 14. Mounting seat; 15. Telescopic rod; 16. Roller; 17. Arc groove; 18. Discharge pipe; 19. Vibrating screen; 20. Connecting part; 21. Screw rod; 22. Guide rail seat; 23. Mounting part; 24. Elastic clamp; 25. Linear slide rail; 26. Fixed frame; 27. Guide slide groove. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0031] Example 1

[0032] like Figure 1-3 As shown, a device for detecting the flow properties of machine-made sand concrete comprises a fixed base plate 1 and a spray flushing mechanism, wherein a lifting mechanism and a mounting turntable 2 are provided on the fixed base plate 1, a rotational viscometer 4 is provided on the lifting mechanism, a stirring blade 5 is provided at the bottom end of the rotational viscometer 4, a plurality of rollers 3 are provided on the bottom surface of the mounting turntable 2, a circular track 6 for cooperating with the rollers 3 is provided on the top surface of the fixed base plate 1, a plurality of mortar containers 7 are provided on the top surface of the mounting turntable 2 along the circumferential direction, a feed port 8 is provided on the top of the mortar container 7, and the position of the feed port 8 corresponds to the rotational viscometer 4, a discharge port 9 is provided on the bottom of the mortar container 7, a control valve 10 is provided at the discharge port 9, and the spray flushing mechanism comprises a water pipe 11, a spray head 12 is provided at the mouth of the water pipe 11, and a spray valve 13 is provided at the spray head 12.

[0033] In the above scheme, the lifting mechanism and the mounting turntable 2 are connected and positioned by fixing the bottom plate 1. The lifting mechanism is used to drive the rotary viscometer 4 to rise and fall, so that the stirring blade 5 is inserted into and removed from the mortar container 7, so as to realize the viscosity test of the mortar and facilitate the movement of the mortar container 7. The roller 3 at the bottom of the mounting turntable 2 is used to cooperate with the circular track 6, so as to realize the rotatable connection of the mounting turntable 2. By rotating the mounting turntable 2, different mortar containers 7 can be moved to the lower side of the rotary viscometer 4 for viscosity test, and the mortar container 7 that needs to be left still after the concrete is placed can be removed. The feed port 8 can be used to add concrete and insert the stirring blade 5. The control valve 10 is used to control the switch of the discharge port 9. The tested concrete can be discharged through the discharge port 9. The water pipe 11 of the spray flushing mechanism is used to conduct high-pressure water to the spray head 12 for spraying. After the test is completed, the inside of the mortar container 7 is flushed to facilitate the discharge of concrete and subsequent testing. The spray valve 13 can control the spray switch, and the water pipe 11 is connected to the high-pressure water source.

[0034] The mortar container 7 is a cylindrical structure, and four mortar containers 7 are evenly distributed along the top surface of the mounting turntable 2. A positioning groove is provided on the roller 3, and a circular positioning protrusion for matching with the positioning groove is provided on the circular track 6.

[0035] Furthermore, an elastic limiting member is disposed on the fixed base plate 1 , and an outer ring of the mounting turntable 2 is provided with a plurality of positioning structures for engaging with the elastic limiting member.

[0036] The angle of the mounting turntable 2 is temporarily positioned by engaging the positioning structure of the outer ring of the mounting turntable 2 with an elastic limiting piece, so that the relative positions of the rotational viscometer 4 and the mortar container 7 remain consistent each time the work is carried out, thereby ensuring the test effect.

[0037] The plurality of mortar containers 7 are arranged equidistantly along the circumferential direction, and the outer ring of the mounting turntable 2 is provided with a plurality of positioning structures equidistantly.

[0038] Furthermore, the elastic limiting member includes a mounting seat 14 , a telescopic rod 15 in a horizontal direction is arranged on the mounting seat 14 , a roller 16 is arranged at the end of the telescopic rod 15 , and the positioning structure includes an arc groove 17 .

[0039] The telescopic rod 15 is connected and positioned through the mounting seat 14 so that the roller 16 can be telescopically moved in the horizontal direction. When the arc groove 17 corresponds to the position of the roller 16, the roller 16 extends out and engages in the arc groove 17, and the mortar container 7 is directly below the rotational viscometer 4.

[0040] The roller 16 is connected to a fixing frame 26, and the mounting seat 14 is provided with a guide slot 27 for slidingly cooperating with the fixing frame 26. The telescopic rod 15 comprises a sleeve and an inner rod, and a return spring is provided between the inner rod and the sleeve. The telescopic rod 15 can also adopt a common model in the market.

[0041] Furthermore, a discharge pipe 18 is provided at the bottom of the mortar container 7 , and a discharge port 9 is provided at the bottom end of the discharge pipe 18 .

[0042] The mortar is centrally guided through the discharge pipe 18 so that the mortar flows out from the discharge port 9 .

[0043] Furthermore, the lifting mechanism includes a connecting part 20, a motor is arranged inside the connecting part 20, the motor is rotatably connected to a screw rod 21, a guide rail seat 22 is arranged on the top of the connecting part 20, the screw rod 21 is rotatably connected to the guide rail seat 22, the rotational viscometer 4 is connected to a mounting part 23, the mounting part 23 is slidably connected to the guide rail seat 22, and the mounting part 23 is threadedly connected to the screw rod 21.

[0044] The connecting part 20 is used to support and position the guide rail seat 22 and the motor. The motor drives the screw rod 21 to rotate, and then drives the installation part 23 to be lifted. The guide rail seat 22 is provided with a linear slide rail 25 to be slidably connected with the installation part 23, so that the installation part 23 can be lifted and lowered stably.

[0045] Furthermore, a positioning piece is provided on the connecting portion 20 , and the positioning piece is detachably connected to the shower head 12 .

[0046] A positioning piece is provided to detachably cooperate with the shower head 12 , so as to facilitate temporary fixation of the shower head 12 .

[0047] The positioning member includes two elastic snap rings 24 , and the elastic snap rings 24 are provided with snap grooves for cooperating with the sprinkler head 12 .

[0048] Example 2

[0049] like Figure 4 As shown, a device for detecting flow properties of machine-made sand concrete in this embodiment is further modified as follows on the basis of Embodiment 1:

[0050] Furthermore, a discharge pipe 18 is provided at the bottom of the mortar container 7 , a discharge port 9 is provided at the bottom end of the discharge pipe 18 , and a vibrating screen 19 is provided at the discharge port 9 .

[0051] The mortar is centrally guided through the discharge pipe 18 so that the mortar flows out from the discharge port 9 to the vibrating screen 19, and the concrete is screened by the vibrating screen 19 to recycle the aggregate.

[0052] The corresponding relationship between the material opening of the vibrating screen 19 and the discharge pipe 18 can be adjusted as needed.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the flow properties of machine-made sand concrete, characterized in that: It includes a fixed bottom plate and a spray flushing mechanism, wherein a lifting mechanism and a mounting turntable are arranged on the fixed bottom plate, a rotational viscometer is arranged on the lifting mechanism, a stirring blade is arranged at the bottom end of the rotational viscometer, a plurality of rollers are arranged on the bottom surface of the mounting turntable, a circular track for cooperating with the rollers is arranged on the top surface of the fixed bottom plate, a plurality of mortar containers are arranged along the circumferential direction on the top surface of the mounting turntable, a feed port is arranged on the top of the mortar container, the position of the feed port corresponds to the rotational viscometer, a discharge port is arranged on the bottom of the mortar container, a control valve is arranged at the discharge port, and the spray flushing mechanism comprises a water pipe, a spray head is arranged at the mouth of the water pipe, and a spray valve is arranged at the spray head.

2. The device for detecting the flow properties of machine-made sand concrete according to claim 1 is characterized in that: The fixed bottom plate is provided with an elastic limiting member, and the outer ring of the mounting turntable is provided with a plurality of positioning structures for engaging with the elastic limiting member.

3. The device for detecting the flow properties of machine-made sand concrete according to claim 2 is characterized in that: The elastic limiting member comprises a mounting seat, a telescopic rod in a horizontal direction is arranged on the mounting seat, a roller is arranged at the end of the telescopic rod, and the positioning structure comprises an arc groove.

4. The device for detecting the flow properties of machine-made sand concrete according to claim 2 is characterized in that: A discharge pipe is arranged at the bottom of the mortar container, a discharge port is arranged at the bottom end of the discharge pipe, and a vibrating screen is arranged at the discharge port.

5. The device for detecting the flow properties of machine-made sand concrete according to claim 1 is characterized in that: The lifting mechanism includes a connecting part, a motor is arranged inside the connecting part, the motor is rotatably connected to a screw rod, a guide rail seat is arranged on the top of the connecting part, the screw rod is rotatably connected to the guide rail seat, the rotational viscometer is connected to a mounting part, the mounting part is slidably connected to the guide rail seat, and the mounting part is threadedly connected to the screw rod.

6. The device for detecting the flow properties of machine-made sand concrete according to claim 5 is characterized in that: The connection portion is provided with a positioning piece, and the positioning piece is detachably connected to the shower head.

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