Concrete slump test detection scale

Abstract

The utility model belongs to the technical field of concrete slump tests, and particularly relates to a concrete slump test detection scale which comprises a datum plate and a vertical measuring scale plate, an insertion hole is formed in the datum plate, the vertical measuring scale plate is connected to the inner wall of the insertion hole in a sliding mode, a silica gel plate is arranged at the bottom end of the vertical measuring scale plate, and the silica gel plate is connected with the datum plate in a sliding mode. The silica gel plate is in contact with the bottom of the vertical measuring ruler plate, a connecting frame is installed at the top end of the silica gel plate, and a built-in air bag and an air pressure sensor are installed in the vertical measuring ruler plate. The silica gel plate firstly makes contact with a sample, the silica gel plate drives the connecting frame to extrude the built-in air bag under the counter-acting force of the sample, so that the air pressure sensor can sense the change of pressure, the driving motor can receive an instruction to stop driving, the vertical measuring ruler plate does not descend any more, and the probability of bumping the sample is reduced; and a worker can directly hold the detection device for reading, and the operation mode is simple, convenient and rapid.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of concrete slump test, concretely relates to a concrete slump test detection scale. BACKGROUND

[0002] At present, the detection of concrete slump is mainly carried out through slump test, and the detection scale used in the test is usually a straight ruler with scales in millimeters. In the existing concrete slump test operation process, the specific detection principle is to fill the concrete mixture into the standard conical slump cylinder according to the specified method, and after filling and scraping, the slump cylinder is vertically lifted upward. Due to the gravity of the concrete mixture itself, the slump phenomenon will occur. Subsequently, the vertical distance from the top of the slump cylinder to the highest point of the slump concrete mixture is measured by using the detection scale, so as to obtain the slump value of the concrete, so as to evaluate the fluidity of the concrete mixture, and the arithmetic mean value is taken as the slump spread value to assist in judging the performance of the concrete.

[0003] However, the current slump test detection method has some obvious defects. On the one hand, in actual operation, the user usually needs to use two rulers, one straight ruler as a measurement reference and the other steel ruler for actual measurement. This operation method is relatively cumbersome, not convenient and fast, and increases the time cost and labor cost of test operation. On the other hand, during the measurement process, the concrete mixture is still in the unhardened state and has the characteristics of fluidity, cohesiveness and water retention, and can deform to a certain extent under the action of gravity. However, due to the rigidity of the steel ruler and the instability of the operation, the unhardened concrete sample is easily damaged during the process of moving from the top to the sample top under the control of the user's hand, resulting in part of the sample surface being concave. Once the sample surface is concave, the data obtained by measurement will be affected by this factor, and the real slump of the concrete cannot be accurately reflected, which will affect the accurate evaluation of the workability of the concrete, and finally may have an adverse effect on the quality control of the construction project. UTILITY MODEL CONTENTS

[0004] The utility model provides a concrete slump test detection scale, which has the characteristics of convenient sample slump measurement and improved measurement accuracy.

[0005] The utility model provides following technical scheme: including benchmark board and vertical measuring scale board, the benchmark board is opened with the jack, the vertical measuring scale board slidingly connects in the inner wall of the jack, the vertical measuring scale board bottom is provided with silica gel board, the silica gel board with vertical measuring scale board bottom contact, the silica gel board top is installed with the connecting frame, the connecting frame slidingly connects in the inner wall of the vertical measuring scale board, the vertical measuring scale board is installed with built -in air bag and air pressure sensor, the connecting frame with built -in air bag bottom contact, the air pressure sensor detection end is in built -in air bag inside, the benchmark board top -end embeddedly installed with drive motor, drive motor output is installed with the lead screw, the lead screw side wall is connected with the connecting plate, the connecting plate is installed in the vertical measuring scale board one side, drive motor with air pressure sensor electric connection.

[0006] Wherein, the vertical measuring scale board both sides are installed with side plate, two the side plate bottom end embeddedly installed with infrared distance measuring sensor, infrared distance measuring sensor position is higher than the silica gel board, two infrared distance measuring sensor with drive motor electric connection.

[0007] Wherein, the jack is opened with two let go of slot, the side plate is connected with the inner wall of corresponding let go of slot.

[0008] Wherein, the lead screw top rotation is connected with the limit disc, the connecting plate with limit disc bottom contact.

[0009] Wherein, the benchmark board is opened with strip hole, the strip hole is in drive motor one side.

[0010] Wherein, the strip hole inner wall slidingly connects with control mechanism support seat, two control buttons are installed on the control mechanism support seat top, two control buttons with drive motor electric connection.

[0011] Wherein, the control mechanism support seat both ends are fixedly connected with sliding block, two slide grooves are opened in the strip hole, the sliding block is slidingly connected with the inner wall of corresponding slide groove.

[0012] The utility model has the advantages of: through benchmark board and drive motor support and lift adjustment to vertical measuring scale board, so that the user can use one hand, without manually using two rulers to measure, use more convenient and fast, through silica gel board first contact with sample, silica gel board is driven by the reaction force of sample and connecting frame to built -in air bag, so that the air pressure sensor can sense the change of pressure, so that drive motor can receive instruction and stop driving, and then make the vertical measuring scale board no longer drop, reduce the probability of sample injury, improve accuracy, the staff can directly hold the detection device to measure, the operation mode is simple, convenient and fast.

[0013] The parts not involved in the device are the same as or can be implemented by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 3 It is Figure 2 An enlarged schematic diagram of part A in the middle;

[0017] Figure 4 It is a schematic diagram of the three-dimensional enlarged cross-sectional structure of the vertical measuring scale plate in the utility model;

[0018] Figure 5 It is Figure 4 An enlarged schematic diagram of part B in the middle.

[0019] In the figure: 1, reference plate; 11, jack; 111, give way slot; 12, strip-shaped hole; 121, sliding slot; 2, vertical measuring scale plate; 21, silica gel plate; 22, connecting frame; 23, built-in air bag; 24, air pressure sensor; 25, side plate; 26, infrared distance measuring sensor; 3, driving motor; 31, lead screw; 311, limit disc; 32, connecting plate; 4, control mechanism support seat; 41, control button; 42, sliding block. DETAILED DESCRIPTION

[0020] Please refer to Figures 1-5 The utility model provides the following technical scheme: including reference plate 1 and vertical measuring scale plate 2, reference plate 1 is set with jack 11, vertical measuring scale plate 2 is slidably connected in the inner wall of jack 11, vertical measuring scale plate 2 bottom end is provided with silica gel plate 21, and silica gel plate 21 is in contact with the bottom of vertical measuring scale plate 2, and silica gel plate 21 top end is installed with connecting frame 22, and connecting frame 22 is slidably connected in the inner wall of vertical measuring scale plate 2, and vertical measuring scale plate 2 is installed with built-in air bag 23 and air pressure sensor 24, and connecting frame 22 is in contact with the bottom end of built-in air bag 23, and the detection end of air pressure sensor 24 is in the inside of built-in air bag 23, and reference plate 1 top end is embeddedly installed with driving motor 3, and driving motor 3 output end is installed with lead screw 31, and the lateral wall of lead screw 31 is threadedly connected with connecting plate 32, and connecting plate 32 is installed on one side of vertical measuring scale plate 2, and driving motor 3 and air pressure sensor 24 are electrically connected.

[0021] In this implementation scheme: the reference plate 1 supports all components of the device; the insertion hole 11 guides the vertical measuring ruler 2, allowing it to slide up and down in a set direction. The vertical measuring ruler 2, through the positioning relationship between its side wall scale lines and the reference plate 1, is used to determine the slump value of the concrete. The vertical measuring ruler 2 is connected to the lead screw 31 via a connecting plate 32. The drive motor 3 is embedded in the reference plate 1 to reduce interference from external factors. The lead screw 31 adjusts the lifting and lowering of the connecting plate 32, enabling it to drive the vertical measuring ruler 2. The silicone plate 21 is located at the bottom of the vertical measuring ruler 2, and the vertical measuring ruler 2 contacts the top of the concrete sample through the silicone plate 21. The silicone plate 21, with its flexibility, reduces contact damage to the sample. The silicone plate 21 is constrained on the vertical measuring ruler 2 by a connecting frame 22, which slides up and down within the internal space of the vertical measuring ruler 2. The internal air pressure of the built-in airbag 23 remains stable when not disturbed by the connecting frame 22. The air pressure sensor 24 senses the air pressure in the built-in airbag 23 in real time. In use, the reference plate 1 is placed on top of the slump cylinder, and the vertical measuring scale 2 is positioned above the sample. By controlling the drive motor 3 to rotate the lead screw 31, the connecting plate 32 can drive the vertical measuring scale 2 to descend. The vertical measuring scale 2 descends and approaches the top of the sample. The silicone plate 21 first contacts the sample. The silicone plate 21, under the reaction force of the sample, causes the connecting frame 22 to apply pressure to the built-in airbag 23, thereby enabling the air pressure sensor 24 to sense the pressure change. The air pressure sensor 24 transmits the data to the PLC control unit of the device, so that the drive motor 3 can receive the instruction from the PLC control unit to stop driving, thus preventing the vertical measuring scale 2 from descending further, reducing the probability of damaging the sample, improving accuracy, and allowing the operator to directly hold the testing device for measurement. The operation is simple, convenient, and quick.

[0022] Both sides of the vertical measuring scale 2 are equipped with side plates 25. Infrared ranging sensors 26 are embedded at the bottom of both side plates 25. The infrared ranging sensors 26 are positioned higher than the silicone plate 21. Both infrared ranging sensors 26 are electrically connected to the drive motor 3. The side plates 25 support the infrared ranging sensors 26. When the vertical measuring scale 2 descends, it drives the side plates 25 to descend together. The infrared ranging sensors 26 sense the distance between themselves and the top of the sample. When the set distance is reached, the infrared ranging sensors 26 transmit the data to the PLC control unit of the device. This allows the drive motor 3 to receive the command issued by the PLC control unit and reduce the drive power by ten times. This slows down the descent speed of the vertical measuring scale 2 as it approaches the sample, further reducing the probability of damaging the sample and improving accuracy.

[0023] Two clearance grooves 111 are provided in the insertion hole 11, and the side plate 25 is engaged with the inner wall of the corresponding clearance groove 111. The insertion hole 11 makes way for the side plate 25 through the two clearance grooves 111, so that when the vertical measuring ruler plate 2 is reset and stored upward, the side plate 25 can be stored in the clearance groove 111.

[0024] The top of the lead screw 31 is rotatably connected to the limiting plate 311, and the connecting plate 32 is in contact with the bottom of the limiting plate 311. When the limiting plate 311 is at the top position of the lead screw 31, the connecting plate 32 will be blocked and limited by the limiting plate 311 when the vertical measuring scale 2 and the connecting plate 32 rise, so as to prevent the vertical measuring scale 2 from separating from the reference plate 1 and ensure the stability of the device.

[0025] The reference plate 1 has a strip hole 12, which is located on one side of the drive motor 3. The strip hole 12 makes the reference plate 1 hollow, reducing weight, and the device can be hung on the support point through the strip hole 12, making it more convenient to use.

[0026] A control mechanism support 4 is slidably connected to the inner wall of the strip hole 12. Two control buttons 41 are installed on the top of the control mechanism support 4. Both control buttons 41 are electrically connected to the drive motor 3. The control mechanism support 4 supports the two control buttons 41, and the two control buttons 41 wirelessly control the drive motor 3, so that the drive motor 3 can adjust the vertical measuring ruler 2 to rise and fall.

[0027] Both ends of the control mechanism support base 4 are fixedly connected to sliders 42. Two grooves 121 are opened in the strip hole 12, and the sliders 42 are slidably connected to the inner wall of the corresponding groove 121. The control mechanism support base 4 is restricted in the two grooves 121 by the two sliders 42, so that the control mechanism support base 4 can slide more stably. The control mechanism support base 4 can drive the control button 41 to slide to the position required by the user for use, which is more flexible and convenient. The surface of the sliders 42 has a damping coating, so that the control mechanism support base 4 can be in the position more stably after the position is adjusted and is not easy to shake.

[0028] The working principle and usage process of this utility model are as follows: In use, the reference plate 1 is placed on top of the slump cylinder, and the vertical measuring scale 2 is positioned above the sample. By pressing one of the control buttons 41, the control button 41 controls the drive motor 3, which in turn rotates the lead screw 31, causing the connecting plate 32 to lower the vertical measuring scale 2. As the vertical measuring scale 2 descends, it also lowers the side plate 25. The infrared distance sensor 26 senses the distance between itself and the top of the sample. When the set distance is reached, the infrared distance sensor 26 transmits the data to the PLC control unit of the device, enabling... The drive motor 3 can receive instructions from the PLC control unit to reduce its drive power tenfold, causing the vertical measuring scale 2 to slow down its descent as it approaches the sample. The silicone plate 21 first contacts the sample, and the reaction force from the sample causes the connecting frame 22 to compress the built-in airbag 23. This allows the pressure sensor 24 to sense the pressure change, and the pressure sensor 24 transmits the data to the PLC control unit of the device. This allows the drive motor 3 to receive instructions from the PLC control unit to stop driving, thus preventing the vertical measuring scale 2 from descending further, reducing the probability of damaging the sample and improving accuracy.

Claims

1. A slump test detection scale for concrete comprising a reference plate (1) and a vertical measuring scale plate (2), characterised in that: The reference plate (1) is provided with a jack (11), the vertical measuring scale plate (2) is slidably connected to the inner wall of the jack (11), the vertical measuring scale plate (2) is provided with a silica gel plate (21) at the bottom end, the silica gel plate (21) is in contact with the bottom of the vertical measuring scale plate (2), the silica gel plate (21) is provided with a connecting frame (22) at the top end, the connecting frame (22) is slidably connected to the inner wall of the vertical measuring scale plate (2), the vertical measuring scale plate (2) is provided with an internal air bag (23) and an air pressure sensor (24), the connecting frame (22) is in contact with the bottom end of the internal air bag (23), the detection end of the air pressure sensor (24) is located in the internal air bag (23), the reference plate (1) is provided with a driving motor (3) embedded at the top end, the driving motor (3) is provided with a lead screw (31) at the output end, the lead screw (31) is provided with a connecting plate (32) on the side wall, the connecting plate (32) is installed on one side of the vertical measuring scale plate (2), and the driving motor (3) is electrically connected with the air pressure sensor (24).

2. A slump test scale for concrete according to claim 1, wherein: The vertical measuring scale plate (2) is provided with a side plate (25) on both sides, and the infrared distance measuring sensor (26) is embedded on the bottom end of the two side plates (25), the position of the infrared distance measuring sensor (26) is higher than that of the silica gel plate (21), and the two infrared distance measuring sensors (26) are electrically connected with the driving motor (3).

3. A slump test scale according to claim 2, wherein: The jack (11) is provided with two accommodating grooves (111), and the side plate (25) is clamped and connected to the inner wall of the accommodating groove (111).

4. The slump test scale of claim 1, wherein: The lead screw (31) is rotatably connected with a limiting disc (311) at the top end, and the connecting plate (32) is in contact with the bottom end of the limiting disc (311).

5. The slump test scale of claim 1, wherein: The reference plate (1) is provided with a strip-shaped hole (12), and the strip-shaped hole (12) is located on one side of the driving motor (3).

6. A slump test scale according to claim 5, wherein: The inner wall of the strip-shaped hole (12) is slidably connected with a control mechanism support seat (4), and the control mechanism support seat (4) is provided with two control buttons (41) at the top end, and the two control buttons (41) are electrically connected with the driving motor (3).

7. A slump test scale according to claim 6, wherein: The control mechanism support seat (4) is fixedly connected with a sliding block (42) at both ends, the strip-shaped hole (12) is provided with two sliding grooves (121), and the sliding block (42) is slidably connected to the inner wall of the corresponding sliding groove (121).

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