Concrete vibrating device and method for thin-shell concrete structures

Abstract

The present application relates to the technical field of concrete vibrating, and discloses a concrete vibrating device and a vibrating method for a thin-shell concrete structure. A plurality of through holes are arranged at intervals on an original thin-shell concrete wooden formwork, and a detachable flexible formwork is installed on the surface of the through holes, so that the wooden formwork and the flexible formwork jointly constitute a formwork of the thin-shell concrete structure. A vibrating unit is connected to the outer side of the flexible formwork, and a driving assembly of the vibrating unit drives a fixed block to reciprocatingly move in a direction perpendicular to the surface of the wooden formwork, so as to push the flexible formwork to reciprocatingly vibrate. In the reciprocating vibrating process of the flexible formwork, the flexible formwork reciprocatingly extrudes the concrete on the inner side, so that the concrete forms an outward flowing effect, and thus the vibrating volume can be increased. Based on the structure, while effectively vibrating the thin-shell concrete, the vibrating device is avoided from directly acting on the wooden formwork, the influence on the wooden formwork is reduced, and thus the construction quality of the thin-shell concrete structure is ensured.

Description

Technical Field

[0001] This invention relates to the field of concrete vibration technology, specifically to a concrete vibration device and vibration method for thin-shell concrete structures. Background Technology

[0002] In the construction of existing buildings, the exterior decorative lines often extensively utilize irregularly shaped concrete structures, such as concrete structures with 45-degree or 60-degree sloping surfaces and internal cavities. The concrete design thickness is only 80mm, and it is reinforced with steel mesh. When vibrating this type of ultra-thin formwork concrete with its deep depth, thin thickness, and steel mesh, to ensure the construction quality of the thin-shell concrete, the vibrator cannot touch the formwork or be placed inside the steel mesh; therefore, traditional vibrating devices cannot be used. Summary of the Invention

[0003] To address the aforementioned deficiencies in existing technologies, a concrete vibration device and method for thin-shell concrete structures are provided. This method effectively vibrates the thin-shell concrete while avoiding direct contact between the vibration device and the wooden formwork, thus reducing the impact on the formwork and ensuring the construction quality of the thin-shell concrete structure.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A concrete vibrating device for thin-shell concrete structures is characterized by comprising a vibrating unit and a detachable flexible template. A plurality of through holes are spaced apart on the wooden template of the thin-shell concrete structure. The flexible template is installed at the through holes and covers the through holes, forming a single template unit with the wooden template. An installation groove is provided on the outer side of the flexible template. A driving component and a fixing block matching the installation groove are provided within the vibrating unit. The fixing block is fixed within the installation groove, and the driving component drives the fixing block to reciprocate in a direction perpendicular to the template.

[0006] According to the above technical solution, the vibrating unit includes a housing, a motor installed inside the housing, and a reciprocating bearing installed on the housing; one side of the drive assembly is connected to the motor, and the other side of the drive assembly passes through the bearing hole of the reciprocating bearing and is fixedly connected to an external fixing block; the drive assembly converts the rotational motion of the motor into reciprocating linear motion.

[0007] According to the above technical solution, the drive assembly includes a first transmission rod, a crankshaft, and a second transmission rod. The crankshaft adopts a π-shaped structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end connected to a fixed block through the bearing hole of the sliding bearing. The second transmission rod is horizontally arranged, with one end fixedly connected to the motor output shaft and the other end connected to the end of the first or fifth segment through a bevel gear. The end of the fifth or first segment is rotatably connected to the housing.

[0008] According to the above technical solution, the drive assembly includes a first transmission rod, a crankshaft, and a second transmission rod. The crankshaft adopts a π-shaped structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end passing through the bearing hole of the sliding bearing and fixedly connected to the fixed block. The second transmission rod is vertically arranged, with one end fixedly connected to the motor output shaft and the other end fixedly connected to the end of the first or fifth segment. The end of the fifth or first segment is rotatably connected to the housing.

[0009] According to the above technical solution, the flexible template includes an outer ring fixing frame that matches the through hole, a flexible plate body located inside the outer ring fixing frame, and a connecting block fixed to the middle of the outer side of the flexible plate body. The inner side of the outer ring fixing frame is consistent with the shape of the through hole. Matching mounting holes are provided on the outer ring fixing frame and the wooden template. The outer ring fixing frame is fixed to the wooden template outside the through hole by bolts passing through the mounting holes. A sealing gasket is provided between the outer ring fixing frame and the template. The mounting groove is provided on the connecting block, and the fixing frame and the connecting block are fixedly connected.

[0010] According to the above technical solution, the connecting block is divided into a connecting part with an installation groove and a fixing part that connects to the flexible plate. The fixing part and the flexible plate have multiple connecting sides, and among the connecting sides, there are both connecting sides that are perpendicular to the surface of the flexible plate and those that are not perpendicular to it.

[0011] According to the above technical solution, the fixing block and the mounting groove are connected by snap-fit ​​and bolt fixing. The mounting groove is composed of a cavity set in the connecting block. The top of the cavity is provided with an opening that matches the size of the fixing block. A through groove for connecting to the outside is provided on the front side of the cavity. The size of the through groove matches the cross-sectional size of the connection between the vibrating structure and the fixing plate. Threaded mounting holes are provided at the matching positions of the connecting plate and the fixing plate. The fixing block is fixedly connected by bolts.

[0012] A method for vibrating concrete in a thin-shell concrete structure is characterized by: opening through holes in a wooden formwork of the thin-shell concrete structure, covering the through holes with a flexible formwork, and driving the flexible formwork to vibrate back and forth, so that the concrete forms an outward flow effect.

[0013] According to the above technical solution, the vibration amplitude of the flexible template is no more than 0.25 times the thickness of the thin-shell concrete structure.

[0014] According to the above technical solution, after the thin-shell concrete structure has hardened, the concrete at the through-hole is ground so that the concrete surface at the through-hole is the same as the concrete surface at the wooden formwork.

[0015] The present invention has the following beneficial effects:

[0016] 1. The original thin-shell concrete wooden formwork has several through holes at intervals. Removable flexible formwork is installed on the surface of these through holes, allowing the wooden and flexible formwork to together form the formwork for the thin-shell concrete structure. A vibration unit is connected to the outside of the flexible formwork. The driving component of the vibration unit drives a fixed block to reciprocate in a direction perpendicular to the surface of the wooden formwork, thereby causing the flexible formwork to vibrate reciprocally. During this reciprocating vibration, the flexible formwork compresses the concrete on the inside, creating an outward flow effect and increasing the vibration volume. Based on this structure, effective vibration of the thin-shell concrete is achieved while avoiding direct action of the vibration device on the wooden formwork, reducing its impact and ensuring the construction quality of the thin-shell concrete structure.

[0017] 2. Because the fixing part between the connecting block and the flexible plate has both perpendicular and non-perpendicular connecting sides, the vibration transmitted from the vibration unit to the connecting block cannot be uniformly transmitted to the flexible plate along the fixing part of the connecting block. This results in differences in the vibration generated by the flexible plate around the connecting block, causing asymmetry in the vibration transmitted from the flexible plate to the concrete, thereby causing micro-flow in the concrete and improving the vibration effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the vibrating unit provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the driving component and the flexible template connection block provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the connection between the sliding bearing and the first conductive rod according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the connecting portion of the connecting block according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the connection between the flexible template and the wooden template provided in an embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view between the flexible template and the wooden template provided in an embodiment of the present invention;

[0024] In the diagram, 1. Vibration unit; 1-1. Drive assembly; 1-11. First transmission rod; 1-12. Crankshaft; 1-13. Second transmission rod; 1-2. Fixing block; 1-3. Housing; 1-4. Reciprocating bearing; 1-5. Operating handle; 2. Flexible template; 2-1. Mounting groove; 2-11. Cavity; 2-12. Opening; 2-13. Through groove; 2-2. Outer ring fixing frame; 2-3. Flexible plate; 2-4. Connecting block; 2-5. Bolt; 2-6. Auxiliary connecting plate; 3. Wooden template. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Reference Figures 1-6 As shown, the concrete vibrating device for thin-shell concrete structures provided by the present invention

[0027] Example 1

[0028] The system includes a vibration unit 1 and a detachable flexible template 2. Several through holes are provided at intervals on the wooden template 3 of the thin-shell concrete structure. The flexible template is installed at the through holes and covers the through holes. The flexible template and the wooden template form a template as a whole. An installation groove 2-1 is provided on the outer side of the flexible template. A drive component 1-1 and a fixing block 1-2 that matches the installation groove are provided in the vibration unit. The fixing block is fixed in the installation groove. The drive component drives the fixing block to reciprocate in a direction perpendicular to the template.

[0029] In this embodiment, the original thin-shell concrete wooden formwork has several through holes spaced apart. A detachable flexible formwork is installed on the surface of these through holes, so that the wooden formwork and the flexible formwork together form the formwork for the thin-shell concrete structure. A vibration unit is connected to the outside of the flexible formwork. The driving component of the vibration unit drives a fixed block to reciprocate in a direction perpendicular to the surface of the wooden formwork, thereby causing the flexible formwork to vibrate reciprocally. During the reciprocating vibration, the flexible formwork compresses the concrete on the inside, creating an outward flow effect and increasing the vibration volume. Based on this structure, effective vibration of the thin-shell concrete is achieved while avoiding direct action of the vibration device on the wooden formwork, reducing its impact and ensuring the construction quality of the thin-shell concrete structure.

[0030] In the above embodiments, a preferred structural form of the vibration unit is provided. The vibration unit includes a housing 1-3 (with an operating handle 1-5 on the housing), a motor disposed inside the housing, and a reciprocating bearing 1-4 disposed on the housing; one side of the drive assembly is connected to the motor, and the other side of the drive assembly passes through the bearing hole of the reciprocating bearing and is fixedly connected to an external fixing block; the drive assembly converts the rotational motion of the motor into reciprocating linear motion.

[0031] Example 2

[0032] The structure and principle of Example 2 are similar to those of Example 1, except that: Figure 2 As shown, a preferred structural form of the drive assembly is given. The drive assembly includes a first transmission rod 1-11, a crankshaft 1-12, and a second transmission rod 1-13. The crankshaft adopts a π-type structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end connected to a fixed block through the bearing hole of the sliding bearing. The second transmission rod is horizontally arranged, with one end fixedly connected to the motor output shaft and the other end connected to the end of the first or fifth segment through a bevel gear. The end of the fifth or first segment is rotatably connected to the housing.

[0033] In this embodiment, the output shaft of the motor is in a horizontal state, and the motor indirectly drives the crankshaft to rotate in the vertical direction through a set of bevel gears, thereby realizing the linear reciprocating movement of the first transmission rod.

[0034] Example 3

[0035] The structure and principle of Embodiment 3 are similar to those of Embodiment 1, except that: another preferred structural form of the drive assembly is given (not shown in the figure). The drive assembly includes a first transmission rod, a crankshaft, and a second transmission rod. The crankshaft adopts a π-shaped structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end passing through the bearing hole of the sliding bearing and fixedly connected to the fixed block. The second transmission rod is vertically arranged, with one end fixedly connected to the motor output shaft and the other end fixedly connected to the end of the first or fifth segment. The end of the fifth or first segment is rotatably connected to the housing.

[0036] In this embodiment, the output shaft of the motor is in a vertical position, and the motor directly drives the crankshaft to rotate in the vertical direction, thereby realizing the linear reciprocating movement of the first transmission rod.

[0037] Example 4

[0038] The structure and principle of Example 4 are similar to those of Examples 1-3, except that: Figure 5-6 As shown, based on the above embodiments 1-3, a preferred structural form of the flexible template is given. Specifically, the flexible template includes an outer ring fixing frame 2-2 that matches the through hole, a flexible plate 2-3 (the flexible plate is made of nylon, plastic, or rubber) located inside the outer ring fixing frame, and a connecting block 2-4 fixed to the middle of the outer side of the flexible plate. The inner side of the outer ring fixing frame is consistent with the shape of the through hole. Matching mounting holes are provided on the outer ring fixing frame and the wooden template. The outer ring fixing frame is fixed to the wooden template outside the through hole by bolts 2-5 passing through the mounting holes. A sealing gasket is provided between the outer ring fixing frame and the template. The mounting groove is provided on the connecting block, and the fixing frame and the connecting block are fixedly connected.

[0039] In this embodiment, the vibrating unit drives the connecting block to perform linear reciprocating motion. During this motion, the connecting block causes the flexible plate to reciprocate at the through hole. As the flexible plate moves, it squeezes the concrete at the through hole back and forth, causing the concrete to flow outward, thereby achieving effective vibration of the concrete within the thin-shell concrete structure.

[0040] Example 5

[0041] The structure and principle of Example 5 are similar to those of Example 4, except that the connecting block is divided into a connecting part with an installation groove and a fixing part that connects to the flexible plate. The fixing part has multiple connecting sides with the flexible plate, including both perpendicular and non-perpendicular sides. Because the fixing part between the connecting block and the flexible plate has both perpendicular and non-perpendicular sides, the vibration transmitted from the vibration unit to the connecting block cannot be uniformly transmitted along the fixing part of the connecting block to the flexible plate. This results in differences in the vibration generated by the flexible plate around the connecting block, causing asymmetry in the vibration transmitted from the flexible plate to the concrete, thus creating micro-flow in the concrete and improving the vibration effect. As shown in the example, one side of the connecting side of the fixing part of the connecting block is perpendicular to the surface of the flexible plate, while the other side is not perpendicular.

[0042] Example 6

[0043] The structure and principle of Example 5 are similar to those of Example 4, except that: Figure 4As shown, based on the above embodiments 1-3, a preferred connection method for the fixing block and the mounting groove is provided. The fixing block and the mounting groove are connected by snap-fit ​​and bolt fixing. The mounting groove is composed of a cavity 2-11 provided in the connecting block. The top of the cavity is provided with an opening 2-12 that matches the size of the fixing block. A through groove 2-13 that connects to the outside is provided on the front side of the cavity. The size of the through groove matches the cross-sectional size of the connection between the vibrating structure and the fixing plate. Threaded mounting holes are provided at matching positions on the connecting plate and the fixing plate, and the fixing block is fixedly connected by bolts.

[0044] In this embodiment, the fixing block slides into the cavity through the opening inside the cavity, and during this process, the first conductive rod slides into the through groove; then, the bolt passes through the threaded mounting holes on the connecting plate and the fixing plate at the same time, thereby realizing the fixed connection between the fixing block and the mounting groove.

[0045] The present invention also provides a method for vibrating concrete in thin-shell concrete structures, wherein through holes are made in the wooden formwork of the thin-shell concrete structure, and a flexible formwork is covered on the through holes. The flexible formwork is driven to vibrate back and forth, so that the concrete forms an outward flow effect.

[0046] In order to achieve a better vibration effect without affecting the construction quality of the thin-shell concrete structure, the vibration amplitude of the flexible formwork should not exceed 0.25 times the thickness of the thin-shell concrete structure.

[0047] In addition, after the thin-shell concrete structure has hardened, the concrete at the through holes is ground to make the concrete surface at the through holes the same as the concrete surface at the wooden formwork.

[0048] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A concrete vibrating device for thin-shell concrete structures, characterized in that: The system includes a vibration unit and a detachable flexible template. Several through holes are spaced apart on the wooden template of the thin-shell concrete structure. The flexible template is installed at the through holes and covers the through holes, forming a single template with the wooden template. An installation groove is provided on the outer side of the flexible template. A drive component and a fixing block that matches the installation groove are provided inside the vibration unit. The fixing block is fixed in the installation groove, and the drive component drives the fixing block to reciprocate in a direction perpendicular to the template. The flexible template includes an outer ring fixing frame that matches the through hole, a flexible board body located inside the outer ring fixing frame, and a connecting block fixed to the middle of the outer side of the flexible board body. The inner side of the outer ring fixing frame is consistent with the shape of the through hole. Matching mounting holes are provided on the outer ring fixing frame and the wooden template. The outer ring fixing frame is fixed to the wooden template outside the through hole by bolts passing through the mounting holes. A sealing gasket is provided between the outer ring fixing frame and the template. The mounting groove is provided on the connecting block, and the fixing frame and the connecting block are fixedly connected.

2. The concrete vibrating device for thin-shell concrete structures according to claim 1, characterized in that: The vibrating unit includes a housing, a motor housed inside the housing, and a reciprocating bearing mounted on the housing. One side of the drive assembly is connected to the motor, and the other side of the drive assembly passes through the bearing hole of the reciprocating bearing and is fixedly connected to an external fixing block. The drive assembly converts the rotational motion of the motor into reciprocating linear motion.

3. The concrete vibrating device for thin-shell concrete structures according to claim 2, characterized in that: The drive assembly includes a first transmission rod, a crankshaft, and a second transmission rod. The crankshaft adopts a π-type structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end connected to a fixed block through the bearing hole of a sliding bearing. The second transmission rod is horizontally arranged, with one end fixedly connected to the motor output shaft and the other end connected to the end of the first or fifth segment through a bevel gear. The end of the fifth or first segment is rotatably connected to the housing.

4. The concrete vibrating device for thin-shell concrete structures according to claim 2, characterized in that: The drive assembly includes a first transmission rod, a crankshaft, and a second transmission rod. The crankshaft adopts a π-shaped structure and includes first, fourth, third, second, and fifth segments connected end to end. The first, third, and fifth segments are all vertically arranged, and the first and fifth segments are located on the same straight line. The first transmission rod is horizontally arranged, with one end fixed to the third segment and the other end passing through the bearing hole of the sliding bearing and fixedly connected to the fixed block. The second transmission rod is vertically arranged, with one end fixedly connected to the motor output shaft and the other end fixedly connected to the end of the first or fifth segment. The end of the fifth or first segment is rotatably connected to the housing.

5. The concrete vibrating device for thin-shell concrete structures according to claim 4, characterized in that: The connecting block is divided into a connecting part with an installation groove and a fixing part that connects to the flexible plate. The fixing part and the flexible plate have multiple connecting sides, and among the connecting sides, there are both connecting sides that are perpendicular to the surface of the flexible plate and those that are not perpendicular to it.

6. The concrete vibrating device for thin-shell concrete structures according to claim 4, characterized in that: The fixing block and the mounting groove are connected by snap-fit ​​and bolt. The mounting groove is composed of a cavity inside the connecting block. The top of the cavity has an opening that matches the size of the fixing block. The front of the cavity has a through groove that connects to the outside. The size of the through groove matches the cross-sectional size of the connection between the vibrating structure and the fixing block. Threaded mounting holes are provided at the matching positions of the connecting block and the fixing block. The fixing block is fixedly connected by bolts.

7. A method for vibrating concrete in thin-shell concrete structures, characterized in that: The concrete vibrating device for thin-shell concrete structures as described in any one of claims 1-6 is used; through holes are made in the wooden formwork of the thin-shell concrete structure, and a flexible formwork is covered over the through holes. The flexible formwork is driven to vibrate back and forth, so that the concrete forms an outward flow effect.

8. The method for vibrating concrete in a thin-shell concrete structure according to claim 7, characterized in that: The vibration amplitude of the flexible template shall not exceed 0.25 times the thickness of the thin-shell concrete structure.

9. The method for vibrating concrete in a thin-shell concrete structure according to claim 7, characterized in that: After the thin-shell concrete structure has hardened, the concrete at the through-hole is ground to make the concrete surface at the through-hole the same as the concrete surface at the wooden formwork.

Images