A low-water heat concrete directional vibrating device

Abstract

The application discloses a low-water-heat concrete directional vibrating device and relates to the technical field of concrete vibrating, which comprises a box body and further comprises a vibrating rod installed on the inner side of the box body, a main machine fixed with the box body and used for driving the vibrating rod to work, a pulley arranged on the inner side of the box body and used for supporting the middle section of the vibrating rod, a driving unit used for driving the pulley to drive the vibrating rod to move in the vertical direction, and a timing unit used for recording the working time of the vibrating rod and moving the vibrating rod back into the box body after the vibrating rod completes the vibrating work for a specified time length. Through cooperation of the timing unit and the driving unit, the vibrating rod can be driven to move out of the concrete after working for a specified time length, so that the concrete is prevented from being vibrated excessively and the strength of the concrete is ensured to be qualified.

Description

Technical Field

[0001] This invention relates to the field of concrete vibration technology, specifically to a directional vibration device for low-heat concrete. Background Technology

[0002] The core advantage of low-heat concrete is that it releases less heat and has a slower rate of temperature rise during the hydration reaction, which can effectively control the temperature difference between the inside and outside of the concrete structure and avoid cracks caused by temperature stress. Therefore, it is usually used in large-volume concrete projects, such as the abutments, piers, abutments, and box girders of large bridges.

[0003] The vibration time of low heat of hydration concrete needs to be strictly controlled within 15-20 seconds. Excessive vibration can easily cause aggregates to settle and cement paste to float, leading to segregation and affecting the strength of the concrete structure. The abutments and box girders of large bridges are usually precast components. When they are produced and poured in the factory, they are usually vibrated manually. The vibration time is basically judged by human experience, which makes it difficult to control the vibration time precisely. It is easy to cause over-vibration due to mistakes, which affects the strength of the concrete. Summary of the Invention

[0004] The purpose of this invention is to provide a low-heat hydration concrete directional vibratory compaction device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-heat-of-hydration concrete directional vibratory compaction device, comprising a housing, and further comprising: Vibrating rod, installed inside the box; The main unit is fixed to the housing and is used to drive the vibratory rod. The pulley is located inside the box and is used to support the middle section of the vibrator. The drive unit is used to drive the pulley to move the vibrating rod in the vertical direction; The timing unit is used to record the working time of the vibrator and, after the vibrator has completed the vibrating work for a specified duration, the drive unit moves the vibrator back into the box.

[0006] As a further embodiment of the present invention, the drive unit includes a rotating shaft and a guide section; the rotating shaft is rotatably mounted on the top of the housing and coaxially fixedly mounted with a take-up roller; a traction rope is wound on the take-up roller, and the end of the traction rope away from the take-up roller is connected to a pulley; a first pulley is coaxially fixedly mounted on the rotating shaft, the first pulley is driven by a second pulley and a tensioning pulley via a transmission belt, the second pulley is driven by a motor, and the motor is fixed to the housing; a second slider is rotatably connected to the tensioning pulley, and the second slider is horizontally slidably connected to the housing; a linear drive component for driving horizontal movement is provided on the side of the second slider; the guide section is used to guide the pulley to move in the vertical direction.

[0007] As a further embodiment of the present invention, the guide portion includes a fixing block, a slider, and a guide rail; the fixing block is used to fix and connect the pulley and the slider, the slider slides in cooperation with the guide rail, and the guide rail is fixed to the housing.

[0008] As a further embodiment of the present invention, the linear drive includes a cylinder, which is fixed to the housing and the output shaft is fixed to the slider.

[0009] As a further embodiment of the present invention, the timing unit includes a timer, the fixed end of which is fixed to the housing, and the free end of which is connected to a gear via a one-way bearing. The gear is coaxially arranged with the timer, and the gear meshes with a rack. The rack is connected to a fixed block. A lever is fixedly connected to the free end of the timer, and a pressure sensor is provided on the side of the lever. The pressure sensor is fixed to the housing and electrically connected to a cylinder.

[0010] As a further aspect of the present invention, the housing is slidably mounted with a plurality of equidistant limiting blocks, which are used to limit the movement of the slider.

[0011] As a further embodiment of the present invention, the limiting block is made of rubber.

[0012] As a further embodiment of the present invention, a sliding plate is fixedly connected to the fixing block, and the rack is slidably connected to the sliding plate; a screw is fixedly connected to the rack, and a nut is threadedly connected to the screw.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes pulleys to support the vibrator, with the vibrator's drop height being twice that of the pulleys. Therefore, the height of the housing can be adjusted according to the required movement height of the pulleys. The number of pulleys is not limited to one; multiple pulleys can be used, thereby reducing the housing height and improving ease of operation for workers. Simultaneously, the invention incorporates a timing unit and a drive unit. The timing unit accurately records the vibration duration of the vibrator. After the vibrator completes the specified vibration time, the drive unit removes the vibrator from the concrete, preventing over-vibration and ensuring the concrete strength meets requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the internal structure of the box of the present invention; Figure 3 This is a cross-sectional view of the vibrator bar of the present invention in its installation state; Figure 4 This is a cross-sectional view of the timing unit of the present invention in its installation state; Figure 5This is a cross-sectional view of the installation state of the limiting block of the present invention; Figure 6 This is a schematic diagram of the rack installation state of the present invention.

[0015] The attached figures are labeled as follows: 1-Box body, 2-Support frame, 3-Vibrator, 4-Main unit, 5-Pulley, 6-Fixing block, 7-Slider one, 8-Guide rail, 9-Rotating shaft, 10-Take-up roller, 11-Pulley one, 12-Pulley two, 13-Tensioning wheel, 14-Transmission belt, 15-Motor, 16-Slider two, 17-Cylinder, 18-Timer, 19-Lever, 20-Pressure sensor, 21-Gear, 22-One-way bearing, 23-Rack, 24-Slide plate, 25-Nut, 26-Screw, 27-Limit block, 28-Moving frame, 29-Traction rope. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-6 The present invention provides a technical solution: a low-heat hydration concrete directional vibration device, including a housing 1, a vibrating rod 3, a main unit 4, a pulley 5, a drive unit, and a timing unit; the vibrating rod 3 is installed inside the housing 1; the main unit 4 is fixed to the housing 1 and is used to drive the vibrating rod 3 to work; the pulley 5 is set inside the housing 1 and is used to support the middle section of the vibrating rod 3; the drive unit is used to drive the pulley 5 to move the vibrating rod 3 in the vertical direction; the timing unit is used to record the working time of the vibrating rod 3, and after the vibrating rod 3 completes the vibration work for a specified duration, the drive unit drives the vibrating rod 3 to move back into the housing 1.

[0018] The movable frame 28 can move the box body 1 along the length of the box girder casting mold, and the box body 1 can move along the width of the casting mold on the movable frame 28; the main unit 4 is fixed to the bottom of the box body 1 by the support frame 2, and the vibrator 3 can be lowered to its maximum height; when it is necessary to vibrate the concrete, the worker pushes the box body 1 to move until the vibrator 3 is directly above the vibration area; then the drive unit drives the pulley 5 to move downwards; as... Figure 3As shown, after pulley 5 moves downward, the working end of vibrating rod 3 moves downward synchronously under gravity. To prevent the middle section of vibrating rod 3 from detaching from pulley 5, a locking block can be set on pulley 5. After pulley 5 moves downward, the timing unit starts working. After vibrating rod 3 vibrates for a specified time, the timing unit sends a command to the drive unit, which drives pulley 5 to move upward to the initial position. Then, the worker pushes the box 1 to the next vibration zone and repeats the above process until the vibration work is completed. This invention, through the setting of pulley 5, allows the pulley to... 5 is used to support the vibrator 3. The falling height of the vibrator 3 is twice that of the pulley 5. Therefore, the height of the box can be set according to the required moving height of the pulley 5. The number of pulleys 5 is not limited to one, and multiple pulleys can be set to reduce the height of the box 1 and improve the convenience of operation for workers. At the same time, through the setting of the timing unit and the drive unit, the timing unit can accurately record the vibration time of the vibrator 3. After the vibrator 3 completes the vibration for the specified time, the drive unit can drive the vibrator 3 to move out of the concrete, which can avoid over-vibration and ensure that the concrete strength is qualified.

[0019] Specifically, such as Figures 1-3 As shown, the drive unit includes a rotating shaft 9 and a guide section; the rotating shaft 9 is rotatably mounted on the top of the housing 1, and a take-up roller 10 is coaxially fixedly mounted thereon; a traction rope 29 is wound around the take-up roller 10, and the end of the traction rope 29 away from the take-up roller 10 is connected to a pulley 5; a pulley 11 is coaxially fixedly mounted on the rotating shaft 9, and the pulley 11 is driven by a transmission belt 14 to a pulley 12 and a tensioning pulley 13, and the pulley 12 is driven by a motor 15, which is fixed to the housing 1; a slider 16 is rotatably connected to the tensioning pulley 13, and the slider 16 is horizontally slidably connected to the housing 1; a linear drive component for driving horizontal movement is provided on the side of the slider 16; the guide section is used to guide the pulley 5 to move in the vertical direction.

[0020] When the vibrator 3 needs to be lowered, the linear drive unit drives the tension wheel 13 to move closer to the pulley 12, so that the transmission belt 14 is in a slack state, the pulley 11 can rotate freely, and the corresponding take-up roller 10 is also in a free state. The vibrator 3 is quickly inserted into the concrete under the action of gravity. Since the height of the bridge abutment and box girder is between 1m and 2m, the maximum drop height of the vibrator 3 is only about 2m, and the required time is less than 1 second. The error brought to the timing unit is small and can be ignored. After the vibrator 3 completes the vibration work for the specified duration, the timing unit sends a work command to the linear drive unit, and the linear drive unit drives the vibrator 3 to move. Tensioning wheel 13 moves away from pulley 12, causing transmission belt 14 to tighten. At this time, the power of motor 15 is transmitted to pulley 11 through pulley 12 and transmission belt 14. Pulley 11 drives take-up roller 10 to rotate at a constant speed. Take-up roller 10 winds up traction rope 29 at a constant speed. Traction rope 29 drives vibrator 3 to be pulled out of concrete at a constant speed through pulley 5 until vibrator 3 moves back into housing 1. When the drive unit of this invention drives vibrator 3 to move, it can achieve "fast insertion and slow withdrawal", which is more suitable for the vibration process of low heat of hydration concrete and avoids excessive vibration that causes aggregate to sink and cement paste to float, resulting in segregation.

[0021] Specifically, such as Figure 3 As shown, the guide part includes a fixing block 6, a slider 7, and a guide rail 8; the fixing block 6 is used to fix and connect the pulley 5 and the slider 7, the slider 7 is slidably engaged with the guide rail 8, and the guide rail 8 is fixed to the housing 1; under the guidance of the guide rail 8, the pulley 5 can move stably in the vertical direction.

[0022] Specifically, such as Figure 1 As shown, the linear drive includes a cylinder 17, which is fixed to the housing 1, and the output shaft is fixed to the slider 16. When the output end of the cylinder 17 extends, the tension wheel 13 moves closer to the pulley 12, and the transmission belt 14 loosens. When the output end of the cylinder 17 retracts, the tension wheel 13 moves away from the pulley 12, and the transmission belt 14 tightens.

[0023] Specifically, such as Figure 4As shown, the timing unit includes a timer 18. The fixed end of the timer 18 is fixed to the housing 1, and the free end is connected to a gear 21 via a one-way bearing 22. The gear 21 is coaxially arranged with the timer 18 and meshes with a rack 23, which is connected to a fixed block 6. A lever 19 is fixedly connected to the free end of the timer 18, and a pressure sensor 20 is provided on the side of the lever 19. The pressure sensor 20 is fixed to the housing 1 and electrically connected to a cylinder 17. The timer 18 is a mechanical timer, which is better suited for concrete pouring. In complex working conditions, when the vibrating rod 3 falls downwards under gravity, the fixing block 6 drives the rack 23 to move downwards synchronously. The rack 23 drives the gear 21 to rotate, and the gear 21 drives the free end of the timer 18 (i.e., the end connected to the pointer) to rotate through the one-way bearing 22. The rotation angle of the gear 21 can be controlled by the number of teeth meshing between the rack 23 and the gear 21, which in turn controls the rotation angle of the pointer of the timer 18, achieving precise timing. After the vibrating rod 3 is inserted into the concrete, the free end of the timer 18 automatically resets. When the free end of the timer 18 drives the lever 19 to automatically rotate back to its original position... Figure 4 After reaching the initial position, lever 19 presses pressure sensor 20, and then cylinder 17 begins to contract, causing tension wheel 13 to move away from pulley 12, and drive belt 14 to tighten; then take-up roller 10 rotates to take up traction rope 29, and pulley 5 drives vibrator 3 to move upward; it should be noted that during the process of fixed block 6 driving rack 23 to move upward to the initial position, although it can drive gear 21 to rotate, the timer 18 will not rotate due to the setting of one-way bearing 22.

[0024] Specifically, such as Figure 5 As shown, the housing 1 is slidably equipped with multiple equidistant limiting blocks 27, which are used to limit the slider 7. The limiting blocks 27 are made of rubber. The function of the limiting blocks 27 is to control the downward movement distance of the slider 7. Since the concrete is poured layer by layer from bottom to top, after one layer of concrete is poured, the workers can push the lower limiting blocks 27 to move inward to the housing 1. The multiple limiting blocks 27 work sequentially from bottom to top.

[0025] Specifically, such as Figure 6 As shown, a sliding plate 24 is fixedly connected to the fixing block 6, and the rack 23 is slidably connected to the sliding plate 24; a screw 26 is fixedly connected to the rack 23, and a nut 25 is threadedly connected to the screw 26; when the nut 25 is loosened, the rack 23 can move in the vertical direction, and the number of meshing teeth between the rack 23 and the gear 21 can be adjusted to adjust the timing time of the timer 18; after the adjustment is completed, tightening the nut 25 will fix the rack 23.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A directional vibratory compaction device for low-heat hydration concrete, comprising a housing (1), characterized in that: Also includes: Vibrating rod (3) is installed inside the box (1); The main unit (4) is fixed to the housing (1) and is used to drive the vibrating rod (3) to work; The pulley (5) is located inside the box (1) and is used to support the middle section of the vibrating rod (3); The drive unit is used to drive the pulley (5) to move the vibrating rod (3) in the vertical direction; The timing unit is used to record the working time of the vibrating rod (3) and, after the vibrating rod (3) has completed the vibrating work for a specified duration, the driving unit drives the vibrating rod (3) to move back into the box (1); The drive unit includes a rotating shaft (9) and a guide section; the rotating shaft (9) is rotatably mounted on the top of the housing (1) and a take-up roller (10) is coaxially fixedly mounted thereon; a traction rope (29) is wound around the take-up roller (10), and the end of the traction rope (29) away from the take-up roller (10) is connected to a pulley (5); a pulley (11) is coaxially fixedly mounted on the rotating shaft (9), and the pulley (11) is connected to a pulley (12) and a tensioning wheel (13) via a transmission belt (14); the pulley (12) is connected to a motor (15), and the motor (15) is fixed to the housing (1); the tensioning wheel (13) is rotatably connected to a slider (16), and the slider (16) is horizontally slidably connected to the housing (1); a linear drive component for driving horizontal movement is provided on the side of the slider (16); the guide section is used to guide the pulley (5) to move in the vertical direction.

2. The low-heat concrete directional vibratory compaction device according to claim 1, characterized in that: The guide section includes a fixing block (6), a slider (7) and a guide rail (8); the fixing block (6) is used to fix and connect the pulley (5) and the slider (7), the slider (7) slides and engages with the guide rail (8), and the guide rail (8) is fixed to the housing (1).

3. The directional vibratory compaction device for low-hydration heat concrete according to claim 1, characterized in that: The linear drive includes a cylinder (17), which is fixed to the housing (1) and the output shaft is fixed to the slider (16).

4. The directional vibratory compaction device for low-heat concrete according to claim 3, characterized in that: The timing unit includes a timer (18), the fixed end of which is fixed to the housing (1), and the free end is connected to a gear (21) via a one-way bearing (22). The gear (21) is coaxially arranged with the timer (18), and the gear (21) meshes with a rack (23). The rack (23) is connected to a fixed block (6). A lever (19) is fixedly connected to the free end of the timer (18). A pressure sensor (20) is provided on the side of the lever (19). The pressure sensor (20) is fixed to the housing (1) and electrically connected to the cylinder (17).

5. A directional vibratory compaction device for low-heat concrete according to claim 2, characterized in that: The housing (1) is slidably mounted with a plurality of equidistant limiting blocks (27), which are used to limit the slider (7).

6. The low-heat concrete directional vibratory compaction device according to claim 5, characterized in that: The limiting block (27) is made of rubber.

7. A directional vibratory compaction device for low-heat concrete according to claim 4, characterized in that: A sliding plate (24) is fixedly connected to the fixed block (6), and the rack (23) is slidably connected to the sliding plate (24); a screw (26) is fixedly connected to the rack (23), and a nut (25) is threadedly connected to the screw (26).

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