Automatic testing device for slump expansion degree of self-compacting concrete

Abstract

The utility model relates to the technical field of self-compacting concrete, in particular to a self-compacting concrete slump expansion degree automatic testing device which comprises a base, a measuring mechanism for measuring concrete slump expansion degree is arranged on the upper surface of the base, and a limiting mechanism is arranged in the base. A third motor and a plurality of supporting rods are fixed to the upper surface of the base, and a top plate is fixed to the upper surfaces of the multiple supporting rods. According to the automatic testing device for the slump expansion degree of the self-compacting concrete, an electric push rod drives a measuring rod to move together with a height measuring instrument, a first motor drives a rotating rod and two first bevel gears to rotate together, and the first bevel gears drive a second bevel gear and a first threaded rod to rotate together; the two first threaded rods drive the moving block, the measuring rod and the height measuring instrument to move together, and after the measuring rod is attached to the top of concrete, the slump expansion degree is obtained through the numerical value measured by the height measuring instrument and the height of the slump cylinder.

Description

Technical Field

[0001] This application relates to the technical field of self-compacting concrete, and specifically to an automatic test device for the slump flow of self-compacting concrete. Background Technique

[0002] Self-compacting concrete is a type of concrete with high fluidity, uniformity, and stability. When pouring, it can flow under its own weight and fill the formwork space without external vibration. Therefore, fluidity is an important performance index of self-compacting concrete. Usually, the slump flow is mainly used to evaluate it. To ensure the pouring quality of self-compacting concrete, before the on-site pouring of self-compacting concrete, it is generally necessary to detect indicators such as slump flow and temperature. For the inspection of the slump flow of self-compacting concrete, currently, a concrete slump cone is used for the test.

[0003] For example, a self-compacting concrete slump flow automatic test device is disclosed in a Chinese patent (Publication No.: CN215339385U), which includes a base, a slump flow disk, a height measuring instrument, a slump cone, and a fixed column. A slump cone is installed on the support rod extended from the fixed column on one side of the top of the base. A slump flow disk is installed at the center position of the top of the base. A height measuring instrument is sleeved on the top of the base on one side of the slump flow disk through a scale. In this utility model, a threaded rod is installed inside the fixed column. When lifting the slump cone, the driving motor can convert electrical energy into mechanical energy. When the driving motor is powered on, it can drive the threaded rod to rotate, and drive the slump cone on the support rod to move upward through the threaded sleeve, so that it can be quickly lifted, avoiding the influence of the slump cone on the concrete slump. And the height measuring instrument can transmit and display the height data by contacting the top surface of the concrete through the sliding rod, and there are annular scales on the inner surface of the slump flow disk for direct reading, realizing automatic measurement.

[0004] The above self-compacting concrete slump flow automatic test device still has certain deficiencies. By installing a rotating mechanism at the bottom of the scale, the sliding rod fixedly connected to the scale through the sliding sleeve can be controlled to rotate horizontally, which will neither hinder the placement of the slump cone nor measure the concrete height in time when needed. Rotating the adjustment knob makes the sliding sleeve drive the sliding rod to move up and down to transmit data and automatically display it on the height measuring instrument. However, during use, since it is necessary to adjust the rotation through the adjustment knob and then test the slump flow of the concrete by sliding the sliding rod, it is not only time-consuming and laborious, but also easily affects the detection effect of the slump flow of the concrete. Therefore, this application proposes an automatic test device for the slump flow of self-compacting concrete to solve the above problems. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the present application provides an automatic testing device for the slump flow of self-compacting concrete, which has the advantages of convenient detection and solves the problem of inconvenient detection of the existing automatic testing device for the slump flow of self-compacting concrete.

[0006] To achieve the above object, the present application provides the following technical solutions: An automatic testing device for the slump flow of self-compacting concrete, including a base, on the upper surface of the base is provided a measuring mechanism for measuring the slump flow of concrete, inside the base is provided a limiting mechanism, on the upper surface of the base are fixed a third motor and a plurality of support rods, on the upper surfaces of the plurality of support rods is fixed a top plate, on the output shaft of the third motor is fixed a third threaded rod, and threadedly connected to the outer surface of the third threaded rod is a connecting plate, and inside the connecting plate is fixed a slump cone.

[0007] The measuring mechanism includes a moving component and a measuring component. The moving component includes a box body fixed to the left side of the upper surface of the base, a first motor fixed to the upper end of the back surface of the inner cavity of the box body, a rotating rod fixed to the output shaft of the first motor, two first bevel gears fixed to the outer surface of the rotating rod, a second bevel gear meshing with the outer surface of the first bevel gear, a first threaded rod fixed to the lower surface of the second bevel gear, and a moving block threadedly connected to the outer surfaces of the two first threaded rods.

[0008] With the above technical solutions, the slump flow of concrete is measured by the measuring mechanism, and the movement and limitation of the base are facilitated by the limiting mechanism.

[0009] Further, the measuring component includes an electric push rod fixed to the right side of the moving block, a measuring rod fixed to the output end of the electric push rod, and a height measuring instrument fixed to the lower surface of the measuring rod.

[0010] With the above technical solutions, the slump flow of concrete is measured by the measuring mechanism.

[0011] Further, the front surface of the rotating rod is rotatably connected to the front surface of the inner cavity of the box body through a bearing seat, and the lower surface of the first threaded rod is rotatably connected to the lower surface of the inner cavity of the box body through a bearing seat.

[0012] With the above technical solutions, the stability of the rotation of the rotating rod and the first threaded rod is increased.

[0013] Further, on both the front and rear sides of the inner cavity of the box body are fixed cross plates, and on the lower surface of the cross plates are fixed sliding rods, and the moving block is slidably connected to the outer surface of the sliding rods.

[0014] With the above technical solutions, the stability of the movement of the moving block is increased.

[0015] Further, the limiting mechanism includes a moving component and a limiting component. The moving component includes a second motor fixed to the left side of the inner cavity of the base, a second threaded rod fixed to the output shaft of the second motor, and two movable blocks threadedly connected to the outer surface of the second threaded rod.

[0016] With the above technical solution, the second motor drives the second threaded rod to rotate, causing the two movable blocks to move away from each other simultaneously.

[0017] Further, the limiting component includes a hinge rod hinged to the lower surface of the movable block, a bottom plate hinged to the lower surface of the hinge rod, and pulleys fixed to the four surrounding sides of the lower surface of the base.

[0018] With the above technical solution, the movable block drives the bottom plate to move through the hinge rod.

[0019] Further, the thread of the second threaded rod has two sections with opposite thread directions. A slider is fixed to the upper surface of the movable block, and a chute is provided on the upper surface of the inner cavity of the base. The slider is slidably connected to the inside of the chute.

[0020] With the above technical solution, by rotating the second threaded rod, the two movable blocks are driven to move relative to each other or away from each other simultaneously. By sliding the slider inside the chute, the stability of the movable block during movement is increased.

[0021] Further, limiting blocks are fixed to both the left and right sides of the bottom plate, and two limiting rods are fixed to the lower surface of the base. The limiting blocks are slidably connected to the outer surface of the limiting rods.

[0022] With the above technical solution, the stability of the bottom plate during movement is increased, facilitating the bottom plate to perform straight up and down movement.

[0023] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0024] 1. For this self-compacting concrete slump flow automatic testing device, through the measuring mechanism, the electric push rod drives the measuring rod and the height measuring instrument to move together. The first motor drives the rotating rod and two first bevel gears to rotate together. Through the first bevel gear, the second bevel gear and the first threaded rod are driven to rotate together. Through the two first threaded rods, the moving block, the measuring rod and the height measuring instrument are driven to move together. When the measuring rod is in contact with the top of the concrete, the slump flow is obtained by the value measured by the height measuring instrument and the height of the slump cone.

[0025] 2. The automatic slump flow test device for self-compacting concrete drives the second threaded rod to rotate through the limiting mechanism and the second motor, causing the two movable blocks to move away from each other simultaneously. The movable blocks drive the bottom plate to move upward through the rotation of the hinge rod, and the bottom plate moves away from the ground, facilitating the movement of the base through the pulleys. Conversely, when the bottom plate moves downward and contacts the ground, the pulleys are limited to prevent the base from moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present application;

[0027] Figure 2 is a three-dimensional external view of the slump cone of the present application;

[0028] Figure 3 is a schematic left-side structural diagram of the measuring mechanism of the present application;

[0029] Figure 4 is a schematic structural diagram of the limiting mechanism of the present application.

[0030] In the figure: 1. Base; 2. Limiting mechanism; 201. Second motor; 202. Second threaded rod; 203. Movable block; 204. Hinge rod; 205. Bottom plate; 206. Pulley; 3. Measuring mechanism; 301. Box body; 302. First motor; 303. Rotating rod; 304. First bevel gear; 305. Second bevel gear; 306. First threaded rod; 307. Moving block; 308. Electric push rod; 309. Measuring rod; 310. Height measuring instrument; 4. Third motor; 5. Third threaded rod; 6. Support rod; 7. Connecting plate; 8. Top plate; 9. Slump cone. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] Please refer to Figure 1-2, an automatic slump flow test device for self-compacting concrete in this embodiment includes a base 1. A slump board is fixed on the upper surface of the base 1. A measuring mechanism 3 for measuring the slump flow of the concrete is provided on the upper surface of the base 1 to measure the slump flow of the concrete. A limiting mechanism 2 is arranged inside the base 1 to facilitate the movement and limitation of the base 1. A third motor 4 and multiple support rods 6 are fixed on the upper surface of the base 1. The upper surfaces of the multiple support rods 6 are fixed with a top plate 8. The output shaft of the third motor 4 is fixed with a third threaded rod 5. A connecting plate 7 is threadedly connected to the outer surface of the third threaded rod 5. A slump cone 9 is fixed inside the connecting plate 7. By driving the third threaded rod 5 to rotate through the third motor 4, the connecting plate 7 and the slump cone 9 are driven to move together. The connecting plate 7 is slidably connected to the outer surface of the support rod 6, increasing the stability of the connecting plate 7 during movement.

[0033] It can be understood that when the slump cone 9 is in contact with the slump board, the concrete is poured into the slump cone 9. After it is full, the third motor 4 drives the third threaded rod 5 to rotate, driving the connecting plate 7 and the slump cone 9 to move together, so that the slump cone 9 moves away from the slump board, facilitating the measurement of the concrete.

[0034] Please refer to Figure 3 , to facilitate the measurement of the slump, the measuring mechanism 3 in this embodiment includes a moving component and a measuring component. The moving component includes a box body 301 fixed on the left side of the upper surface of the base 1, a first motor 302 fixed at the upper end of the inner cavity of the box body 301, a rotating rod 303 fixed on the output shaft of the first motor 302, two first bevel gears 304 fixed on the outer surface of the rotating rod 303, a second bevel gear 305 meshing with the outer surface of the first bevel gear 304, a first threaded rod 306 fixed on the lower surface of the second bevel gear 305, and a moving block 307 threadedly connected to the outer surfaces of the two first threaded rods 306. By driving the rotating rod 303 and the two first bevel gears 304 to rotate together through the first motor 302, the second bevel gear 305 and the first threaded rod 306 are driven to rotate together through the first bevel gear 304.

[0035] The measuring component includes an electric push rod 308 fixed on the right side of the moving block 307, a measuring rod 309 fixed on the output end of the electric push rod 308, and a height measuring instrument 310 fixed on the lower surface of the measuring rod 309. By driving the electric push rod 308, the measuring rod 309 and the height measuring instrument 310 to move together through the moving block 307, the measuring rod 309 is brought into contact with the top of the concrete. The slump flow is obtained by the difference between the value measured by the height measuring instrument 310 and the height of the slump cone 9.

[0036] Among them, the front surface of the rotating rod 303 is rotatably connected to the front surface of the inner cavity of the box body 301 through a bearing seat, which increases the stability of the rotating rod 303 during rotation. The lower surface of the first threaded rod 306 is rotatably connected to the lower surface of the inner cavity of the box body 301 through a bearing seat, which increases the stability of the first threaded rod 306 during rotation.

[0037] In addition, cross plates are fixed on both the front and rear sides of the inner cavity of the box body 301. Slide rods are fixed on the lower surfaces of the cross plates. The moving block 307 is slidably connected to the outer surfaces of the slide rods, which increases the stability of the moving block 307 during movement. Rotation holes are formed on the upper surfaces of the cross plates. The first threaded rod 306 is rotatably connected to the inside of the rotation holes through bearings, which increases the stability of the first threaded rod 306 during rotation.

[0038] In the measuring mechanism 3 of this embodiment, the electric push rod 308 drives the measuring rod 309 and the height measuring instrument 310 to move together. The first motor 302 drives the rotating rod 303 and the two first bevel gears 304 to rotate together. The first bevel gear 304 drives the second bevel gear 305 and the first threaded rod 306 to rotate together. The two first threaded rods 306 drive the moving block 307, the measuring rod 309 and the height measuring instrument 310 to move together. When the measuring rod 309 is in contact with the top of the concrete, the slump spread is obtained by the value measured by the height measuring instrument 310 and the height of the slump cone 9.

[0039] Please refer to Figure 4 , for the convenience of movement and limitation, the limiting mechanism 2 in this embodiment includes a moving component and a limiting component. The moving component includes a second motor 201 fixed to the left side of the inner cavity of the base 1, a second threaded rod 202 fixed to the output shaft of the second motor 201, and two moving blocks 203 threadedly connected to the outer surface of the second threaded rod 202. The second motor 201 drives the second threaded rod 202 to rotate, causing the two moving blocks 203 to move away from each other simultaneously.

[0040] The limiting component includes a hinge rod 204 hinged to the lower surface of the moving block 203, a bottom plate 205 hinged to the lower surface of the hinge rod 204, and pulleys 206 fixed to the four peripheries of the lower surface of the base 1. The moving block 203 drives the bottom plate 205 to move through the hinge rod 204.

[0041] Among them, the thread of the second threaded rod 202 has two sections with opposite thread directions. By rotating the second threaded rod 202, the two moving blocks 203 are driven to move relatively or away from each other simultaneously. Sliders are fixed on the upper surfaces of the moving blocks 203. Sliding grooves are formed on the upper surface of the inner cavity of the base 1. The sliders are slidably connected to the inside of the sliding grooves, which increases the stability of the moving blocks 203 during movement.

[0042] In addition, limiting blocks are fixed on both the left and right sides of the bottom plate 205, and two limiting rods are fixed on the lower surface of the base 1. The limiting blocks are slidably connected to the outer surface of the limiting rods, which increases the stability of the bottom plate 205 during movement and facilitates the linear up-and-down movement of the bottom plate 205.

[0043] In the limiting mechanism 2 of this embodiment, the second motor 201 drives the second threaded rod 202 to rotate, causing the two movable blocks 203 to move away from each other simultaneously. The movable blocks 203 drive the bottom plate 205 to move upward through the rotation of the hinge rods 204, and the bottom plate 205 moves away from the ground, facilitating the movement of the base 1 through the pulleys 206. Conversely, when the bottom plate 205 moves downward and contacts the ground, the pulleys 206 are limited to prevent the base 1 from moving.

[0044] The working principle of the above embodiment is as follows:

[0045] (1) When it is necessary to measure the slump spread, the electric push rod 308 is started, and the electric push rod 308 drives the measuring rod 309 to move. The measuring rod 309 will drive the height measuring instrument 310 to move together. At this time, the first motor 302 is started, and the first motor 302 drives the rotating rod 303 to rotate. The two first bevel gears 304 are driven to rotate through the rotating rod 303. The second bevel gear 305 and the first threaded rod 306 are driven to rotate through the first bevel gears 304. By rotating the two first threaded rods 306 together, the moving block 307 is driven to move. The moving block 307 slides on the outer surface of the sliding rod, increasing the stability of the moving block 307 during movement. The moving block 307 drives the measuring rod 309 and the height measuring instrument 310 to move together. When the measuring rod 309 fits against the top of the concrete, the slump spread is obtained from the value measured by the height measuring instrument 310 and the height of the slump cone 9.

[0046] (2) When it is necessary to move, the second motor 201 is started, and the second motor 201 drives the second threaded rod 202 to rotate. Since the thread directions of the two sections of the second threaded rod 202 are opposite, the two movable blocks 203 are driven to move away from each other simultaneously through the rotation of the second threaded rod 202. The movable blocks 203 drive the sliders to slide inside the sliding grooves, increasing the stability of the movable blocks 203 during movement. When the movable blocks 203 move, they drive the bottom plate 205 to move upward through the rotation of the hinge rods 204. The bottom plate 205 drives the limiting blocks to slide on the outer surface of the limiting rods, increasing the stability of the bottom plate 205 during movement. By moving the bottom plate 205 away from the ground, it is convenient for the base 1 to move through the pulleys 206. Conversely, when the bottom plate 205 moves downward and contacts the ground, the pulleys 206 are limited to prevent the base 1 from moving.

Claims

1. An automatic testing device for slump expansion of self-compacting concrete, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with a measuring mechanism (3) for measuring the slump extension of concrete, the interior of the base (1) is provided with a limiting mechanism (2), the upper surface of the base (1) is fixed with a third motor (4) and a plurality of support rods (6), the upper surfaces of the plurality of support rods (6) are fixed with a top plate (8), the output shaft of the third motor (4) is fixed with a third threaded rod (5), the outer surface of the third threaded rod (5) is threadedly connected with a connecting plate (7), and a slump cylinder (9) is fixed inside the connecting plate (7); The measuring mechanism (3) comprises a moving component and a measuring component, wherein the moving component comprises a box body (301) fixed to the left side of the upper surface of the base (1), a first motor (302) fixed to the upper end of the back side of the inner cavity of the box body (301), a rotating rod (303) fixed to the output shaft of the first motor (302), two first bevel gears (304) fixed to the outer surface of the rotating rod (303), a second bevel gear (305) meshed with the outer surface of the first bevel gear (304), a first threaded rod (306) fixed to the lower surface of the second bevel gear (305), and a moving block (307) threadedly connected to the outer surfaces of the two first threaded rods (306).

2. The automatic testing device for slump expansion of self-compacting concrete according to claim 1, characterized in that: The measuring assembly comprises an electric push rod (308) fixed to the right side of the moving block (307), a measuring rod (309) fixed to the output end of the electric push rod (308), and a height measuring instrument (310) fixed to the lower surface of the measuring rod (309).

3. The automatic testing device for slump expansion of self-compacting concrete according to claim 1, characterized in that: The front surface of the rotating rod (303) is rotatably connected to the front surface of the inner cavity of the box body (301) via a bearing seat, and the lower surface of the first threaded rod (306) is rotatably connected to the lower surface of the inner cavity of the box body (301) via a bearing seat.

4. The automatic testing device for slump expansion of self-compacting concrete according to claim 2, characterized in that: A transverse plate is fixed to both the front and rear sides of the inner cavity of the box body (301), a sliding rod is fixed to the lower surface of the transverse plate, and the moving block (307) is slidably connected to the outer surface of the sliding rod.

5. The automatic testing device for slump expansion of self-compacting concrete according to claim 1, characterized in that: The limiting mechanism (2) comprises a moving assembly and a limiting assembly, wherein the moving assembly comprises a second motor (201) fixed to the left side of the inner cavity of the base (1), a second threaded rod (202) fixed to the output shaft of the second motor (201), and two movable blocks (203) threadedly connected to the outer surface of the second threaded rod (202).

6. The automatic testing device for slump expansion of self-compacting concrete according to claim 5, characterized in that: The position limiting assembly comprises a hinged rod (204) hinged to the lower surface of the movable block (203), a bottom plate (205) hinged to the lower surface of the hinged rod (204), and pulleys (206) fixed to the periphery of the lower surface of the base (1).

7. The automatic testing device for slump expansion of self-compacting concrete according to claim 6, characterized in that: The thread of the second threaded rod (202) is divided into two sections, and the two sections have opposite thread directions. A sliding block is fixed to the upper surface of the movable block (203). A sliding groove is provided on the upper surface of the inner cavity of the base (1), and the sliding block is slidably connected to the inside of the sliding groove.

8. The automatic testing device for slump expansion of self-compacting concrete according to claim 6, characterized in that: Limit blocks are fixed on both left and right sides of the bottom plate (205); two limit rods are fixed on the lower surface of the base (1); and the limit blocks are slidably connected to the outer surfaces of the limit rods.

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