Bidirectional wire twisting mechanism of GFRP mesh braiding machine

Abstract

The utility model discloses a bidirectional wire twisting mechanism of a GFRP mesh braiding machine, which comprises a rack, a plurality of rotary drums are transversely arranged on the rack, delivery wheels are arranged on the rotary drums, a first servo motor is arranged on the rack, the first servo motor is in transmission with the delivery wheels through a chain, and a second servo motor is arranged on the rack. The rotating drum is axially provided with at least two wire through holes, the rack is provided with a GFRP rod inserting mechanism, and the GFRP rod inserting mechanism comprises a driving wheel arranged on the rack and driven by a first motor and a driven wheel elastically pressed against the driving wheel. The GFRP rod inserting mechanism is inserted into the space between at least two wire passing holes when a certain angle is formed between the GFRP rod inserting mechanism and the plurality of conveying wheels. The bidirectional wire twisting mechanism of the mesh braiding machine can realize continuous and automatic forward and reverse twisting of glass fiber bundles and fixed insertion of GFRP rods, and is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of GFRP mesh weaving machines, specifically a bidirectional twisting mechanism for a GFRP mesh weaving machine. Background Technology

[0002] During concrete pouring in building construction, reinforcing bars are typically added to increase strength and crack resistance. Currently, steel mesh is commonly used as this reinforcing bar. Steel mesh is generally made by welding or manually binding multiple horizontally and vertically evenly distributed reinforcing bars. Welding or manual binding is costly and prone to incomplete welds. Steel mesh itself has a high density, resulting in high transportation costs, and the precast concrete components made from it are heavy, leading to significant transportation costs and building loads. Especially when pouring building components with thin concrete slabs, the smooth surface of the reinforcing bars provides insufficient grip on the concrete. Even slight neglect in maintaining the thin concrete slab can cause a mesh-like pattern to form on its surface, effectively creating tiny cracks that mirror the shape of the steel mesh, posing a safety hazard to the thin concrete slab.

[0003] Therefore, existing technologies have developed the use of fiber-woven mesh, which is impregnated with acrylic emulsion and cured, to replace steel mesh. Existing fiber-woven meshes are generally processed by weaving, then impregnated with acrylic emulsion, and finally dried and cured to form a mesh with a certain rigidity. For example, fiberglass mesh is typically woven into a fiberglass mesh first, then impregnated with acrylic emulsion, and finally dried and cured to form a mesh with a certain rigidity. To ensure strength, this method often necessitates weaving the mesh into a mesh with small openings. However, in actual concrete pouring, these small openings can obstruct aggregates, leading to concrete segregation and affecting pouring quality. Furthermore, obstructing aggregates increases the mesh's load-bearing capacity, making it more susceptible to damage.

[0004] The applicant has developed a GFRP mesh, see [link to relevant documentation]. Figure 9The mesh comprises several longitudinally arranged parallel longitudinal bars 100 and several transversely arranged parallel transverse bars 200. The longitudinal bars 100 are formed by twisting two strands of resin-impregnated glass fiber bundles and then curing them. The resin used to impregnate the glass fiber bundles is epoxy resin or unsaturated resin, which greatly increases the strength of the mesh and allows for larger mesh openings, preventing the obstruction of aggregates in concrete. The transverse bars 200 are GFRP rods that pass through and are fixed to the longitudinal bars 100. The longitudinal bars 100 and transverse bars 200 together form the mesh. The processing method of this GFRP mesh includes the following steps: 1) Impregnating several sets of parallel glass fiber bundles with resin, straightening them, and moving them axially; 2) Twisting each set of glass fiber bundles together using a twisting machine to form longitudinal bars; 3) During the twisting and movement of the glass fiber bundles, vertically inserting GFRP rods at intervals between the glass fiber bundles as transverse bars, clamping and fixing the transverse bars within the glass fiber bundles through twisting; 4) Drying in an oven tunnel to form the GFRP mesh. During the processing, when twisting glass fiber bundles, it is necessary to separate the glass fiber bundles at a certain interval to facilitate the insertion of GFRP rods. In order to meet the needs of automated continuous processing and facilitate the insertion of GFRP rods, this solution was developed. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a bidirectional twisting mechanism for a GFRP mesh weaving machine.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a bidirectional twisting mechanism for a GFRP mesh weaving machine, comprising a frame, a plurality of rotating drums arranged laterally on the frame, a transmission wheel arranged on the plurality of rotating drums, the transmission wheel having circumferentially convex teeth, a first servo motor arranged on the frame, the first servo motor being driven by the plurality of transmission wheels via a chain, at least two through holes arranged axially on the rotating drums, and a GFRP rod insertion mechanism arranged on the frame, the GFRP rod insertion mechanism comprising a drive wheel driven by the first motor and a driven wheel elastically pressed against the drive wheel, the rod of the GFRP rod insertion mechanism being positioned at an angle between at least two through holes of the plurality of transmission wheels. The bidirectional twisting mechanism of this mesh weaving machine limits the glass fiber bundle through the through hole on the rotating drum, so that the glass fiber bundle forms a gap on the outlet side of the through hole for the insertion of the GFRP rod. The forward and reverse rotation of the first servo motor can control the glass fiber bundle in the through hole to twist in the forward or reverse direction, fixing the inserted GFRP rod with the twisted glass fiber bundle. It can meet the requirements of continuous automated forward and reverse twisting, with a simple structure and low manufacturing cost.

[0007] In the above technical solution, preferably, the GFRP rod insertion mechanism further includes a guide plate located on the feeding side. This structure makes the direction of GFRP rod insertion more accurate.

[0008] In the above technical solution, preferably, the driven wheel is rotatably disposed at the bottom of a rotating plate that is rotatably connected to the frame, and a tension spring is provided between the rotating plate and the frame, the elastic force of the tension spring giving the driven wheel an elastic force that springs towards the drive wheel.

[0009] In the above technical solution, preferably, the plurality of through holes are arranged around the rotation center of the rotating drum.

[0010] In the above technical solution, preferably, the output side of the rotating drum is provided with a feed tube communicating with the through hole, and the insertion direction of the GFRP rod insertion mechanism is located between the feed tubes on each rotating drum. The feed tubes support the glass fiber bundles, and the space between the feed tubes ensures that the GFRP rod is located between the glass fiber bundles when inserted.

[0011] In the above technical solution, preferably, the transmission pipe has a bent portion that bends outwards away from the rotation center of the rotating drum. This structure further increases the space between the transmission pipes.

[0012] Compared with the prior art, this utility model has the following advantages: The bidirectional twisting mechanism of this mesh weaving machine limits the glass fiber bundle through the through hole on the rotating drum, so that the glass fiber bundle forms a gap for the insertion of the GFRP rod on the outlet side of the through hole. Furthermore, the forward and reverse rotation of the first servo motor can control the glass fiber bundle in the through hole to twist in the forward or reverse direction, fixing the inserted GFRP rod with the twisted glass fiber bundle. It can also meet the requirements of continuous and automated forward and reverse twisting, with a simple structure and low manufacturing cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0014] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0015] Figure 3 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present utility model.

[0016] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0017] Figure 5 This is a schematic diagram of the driving structure of the first swing frame in an embodiment of this utility model.

[0018] Figure 6 This is a schematic diagram of the structure of the first swing frame in an embodiment of this utility model.

[0019] Figure 7This is a schematic diagram of the structure of the second swing frame in an embodiment of this utility model.

[0020] Figure 8 This is a schematic diagram of the rotating drum in an embodiment of the present invention.

[0021] Figure 9 This is a schematic diagram of the structure of a GFRP mesh added to an embodiment of the present invention. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1 to 9A bidirectional twisting mechanism for a GFRP mesh weaving machine includes a frame 1, on which several rotating drums 2 are arranged laterally. Each rotating drum 2 has a transmission wheel 21 with circumferentially serrated teeth. A first servo motor 3 is mounted on the frame 1, and the first servo motor 3 is connected to the several transmission wheels 21 via a chain drive. Each rotating drum 2 has two through holes 22 axially. It is readily understood by those skilled in the art that in other embodiments, if each transverse bar 200 is made of more strands of glass fiber bundles twisted together, the rotating drum 2 needs to have more through holes 22 axially, while the processing process and method remain unchanged. A weft insertion mechanism is mounted on the frame 1, comprising a GFRP bar insertion mechanism 4 located on one side of the several transmission wheels 21 and a GFRP bar actuation mechanism 5. The GFRP bar insertion mechanism 4 includes a GFRP bar insertion mechanism 4 located on one side of the several transmission wheels 21 and a GFRP bar actuation mechanism 5. The frame 1 includes a guide plate 41, a drive wheel 43 driven by a first motor 42, and a driven wheel 44 elastically pressed against the drive wheel 43. The GFRP rod insertion mechanism 4 is positioned between two through holes 22 when the rod is at a certain angle to several transmission wheels 21. The through holes 22 are arranged around the rotation center of the rotating drum 2. In this embodiment, the through holes 22 are two symmetrically arranged on both sides of the rotation center of the rotating drum 2. The rod insertion direction of the GFRP rod insertion mechanism 4 passes through several rotation centers of the rotating drum 2. The GFRP rod actuation mechanism 5 includes a first swing frame 52 rotatably mounted on the frame 1 and driven to swing by a second motor 51. The first swing frame 52 is provided with several actuation parts 53 for actuating the GFRP rod in the fiber bundle moving direction. The first swing frame 52 swings so that the actuation parts 53 swing on both sides of the insertion direction of the GFRP rod insertion mechanism 4. The bidirectional twisting mechanism of this GFRP mesh weaving machine pulls the impregnated glass fiber bundles through the through hole 22 via a traction device. The first servo motor 3 drives the drum 2 to rotate forward, twisting the glass fiber bundles into strands. The GFRP rod insertion mechanism inserts pre-made GFRP rods between the glass fiber bundles. The first swing frame 52 swings, and the actuating part 53 pushes the GFRP rods forward to tighten the twisted glass fiber bundles. Then, the first servo motor 3 drives the drum 2 to rotate in reverse, twisting the glass fiber bundles into strands and fixing the GFRP rods. The first swing frame 52 is reset, and the traction device pulls the glass fiber bundles forward. The GFRP rod insertion mechanism inserts pre-made GFRP rods between the glass fiber bundles. This cycle is repeated to process the GFRP mesh. The bidirectional twisting mechanism of this mesh weaving machine limits the glass fiber bundle through the through hole 22 on the rotating drum 2, so that the glass fiber bundle forms a gap for the insertion of the GFRP rod on the outlet side of the through hole 22. The forward and reverse rotation of the first servo motor 3 can control the glass fiber bundle in the through hole 22 to twist in the forward or reverse direction, fixing the inserted GFRP rod with the twisted glass fiber bundle. It can meet the requirements of continuous and automated forward and reverse twisting, with a simple structure and low manufacturing cost.

[0023] In this embodiment, a second motor 51 is fixed on the frame 1. The second motor 51 is connected to the gearbox 54 via a belt drive. The gearbox 54 is equipped with a pulley 55, and an eccentric shaft 56 is mounted on the pulley 55. An extension arm 57 is mounted on the first swing frame 52. The extension arm 57 is connected to the eccentric shaft 56 via a connecting arm 58 hinged at both ends. The second motor 51 rotates to drive the first swing frame 52 to swing. This structure allows for convenient control of the swing of the first swing frame 52, and it is simple in structure and easy to manufacture.

[0024] In this embodiment, a second swing frame 59 is rotatably mounted on the side of the frame 1 opposite to the first swing frame 52. The second swing frame 59 has a splicing part 510 corresponding to a plurality of actuating parts 53. When the actuating part 53 is located behind the insertion direction of the GFRP rod insertion mechanism 4, the splicing part 510 and the actuating part 53 form a guide opening for the GFRP rod to pass through. When the actuating part 53 swings with the first swing frame 52 to the front of the insertion direction of the GFRP rod insertion mechanism 4, the second swing frame 59 swings to separate the splicing part 510 from the actuating part 53. By providing the second swing frame 59, a guide opening can be formed when the splicing part 510 and the actuating part 53 are spliced, guiding the GFRP rod insertion process and preventing the GFRP rod from deflecting out of the area of ​​the glass fiber bundle to be twisted due to gravity, thus allowing for a wider GFRP mesh. The second swing frame 59 can be driven and controlled by a separate drive device and mechanism.

[0025] In this embodiment, the frame 1 is provided with a plurality of guide wheels 511. A traction belt that passes around the guide wheels 511 connects the second swing frame 59 and the first swing frame 52. When the first swing frame 52 swings, the traction belt drives the second swing frame 59 to swing. With this structure, the second swing frame 59 is pulled by the traction belt and swings automatically and synchronously with the first swing frame 52. There is no need to use a separate drive device and mechanism to control the swing of the second swing frame 59, which reduces manufacturing costs and also solves the problem of synchronization between the first swing frame 52 and the second swing frame 59.

[0026] In this embodiment, both the actuating part 53 and the joining part 510 include a guide part 512 extending in the insertion direction of the GFRP rod. The actuating part 53 and the joining part 510 are joined together to form a guide wall 513 that gradually narrows along the insertion direction of the GFRP rod. This structure improves the guiding effect when the GFRP rod is inserted.

[0027] In this embodiment, the driven wheel 44 is rotatably mounted on the bottom of the rotating plate 45 which is rotatably connected to the frame 1. A tension spring 46 is provided between the rotating plate 45 and the frame 1. The elastic force of the tension spring 46 gives the driven wheel 44 a spring force that propels it toward the drive wheel 43.

[0028] In this embodiment, the output side of the rotating drum 2 is provided with a cable delivery tube 23 communicating with the cable passage hole 22, and the insertion direction of the GFRP rod insertion mechanism 4 is located between the cable delivery tubes 23 on each rotating drum 2. The glass fiber bundles are supported by the cable delivery tubes 23, and the space between the cable delivery tubes 23 ensures that the GFRP rod is located between the glass fiber bundles when inserted.

[0029] In this embodiment, the transmission pipe 23 has a bent portion that bends outward from the rotation center of the rotating drum 2, and this structure further increases the space between the transmission pipes 23.

[0030] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A bidirectional stranding mechanism of a GFRP mesh weaving machine comprising a frame (1), characterized in that: The rack (1) is provided with a plurality of rotating drums (2) transversely, a plurality of the rotating drums (2) are provided with conveying wheels (21), the conveying wheels (21) are circumferentially provided with convex teeth, the rack (1) is provided with a first servo motor (3), the first servo motor (3) is driven by chains with the plurality of conveying wheels (21), the rotating drum (2) is axially provided with at least two wire passing holes (22), the rack (1) is provided with a GFRP rod inserting mechanism (4), the GFRP rod inserting mechanism (4) comprises a driving wheel (43) driven by a first motor (42) arranged on the rack (1) and a driven wheel (44) elastically pressed with the driving wheel (43), the GFRP rod inserting mechanism (4) is out of the rod and is at an angle between the at least two wire passing holes (22) of the plurality of conveying wheels (21).

2. A bidirectional stranding mechanism of a GFRP mesh weaving machine as claimed in claim 1, wherein: The GFRP rod inserting mechanism (4) further comprises a guide plate (41) located on the feeding side.

3. A bidirectional stranding mechanism of a GFRP mesh weaving machine as claimed in claim 1, wherein: The driven wheel (44) is rotatably arranged at the bottom of a rotating plate (45) rotatably connected with the rack (1), a tension spring (46) is arranged between the rotating plate (45) and the rack (1), and the elastic force of the tension spring (46) makes the driven wheel (44) have an elastic force towards the driving wheel (43).

4. The bidirectional stranding mechanism of a GFRP mesh weaving machine according to claim 1, characterized in that: The plurality of wire passing holes (22) are arranged around the rotating center of the rotating drum (2).

5. A bidirectional stranding mechanism of a GFRP mesh weaving machine as claimed in claim 1, wherein: The wire outlet side of the rotating drum (2) is provided with a wire conveying pipe (23) in communication with the wire passing hole (22), and the inserting direction of the GFRP rod inserting mechanism (4) is located between the wire conveying pipes (23) on each rotating drum (2).

6. A bidirectional stranding mechanism of a GFRP mesh weaving machine as claimed in claim 5, wherein: The wire conveying pipe (23) has a bending part bent outward away from the rotating center of the rotating drum (2).

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