CN115929068B - Device for repairing bolt ball node by carbon fiber and repairing method thereof - Google Patents
Device for repairing bolt ball node by carbon fiber and repairing method thereof Download PDFInfo
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- CN115929068B CN115929068B CN202211537704.3A CN202211537704A CN115929068B CN 115929068 B CN115929068 B CN 115929068B CN 202211537704 A CN202211537704 A CN 202211537704A CN 115929068 B CN115929068 B CN 115929068B
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Abstract
The invention relates to the technical field of reinforcement of bolt ball joints of space grid structures, in particular to a device for repairing bolt ball joints by using carbon fibers and a manufacturing method thereof. The device for repairing the bolt ball joint by using the carbon fiber comprises a first hoop clamping plate and a plurality of carbon fiber pieces, wherein the first hoop clamping plate is respectively fixed on a damaged net rack steel pipe rod piece and a healthy net rack steel pipe rod piece of the same bolt ball joint, and two sides of the carbon fiber pieces are respectively fixed on the corresponding two first hoop clamping plates. Through using this device, can repair the reinforcement to the damage rack, be not restricted by construction space to stably promoted the bearing capacity of grid structure's whole node. The adaptability of the construction site is improved, and the construction of the bolt ball joint of the damaged net rack is conveniently, quickly and efficiently reinforced.
Description
Technical Field
The invention relates to the technical field of reinforcement of bolt ball joints of space grid structures, in particular to a device for repairing bolt ball joints by using carbon fibers and a repairing method thereof.
Background
In the construction process of the grid structure, bolt ball joints are needed. The bolt ball node is generally installed on site after being prefabricated in a factory, is convenient to construct, and is suitable for the conditions of tight site construction period, construction conditions and restricted electricity consumption. And if the special-shaped structure with complex grid structure shape and difficult rod positioning is encountered, the bolt ball node is more practical than the common node. However, in practical engineering, construction process defects and overload conditions are commonly existed, and the grid structure of the bolt ball node is often damaged to different degrees due to the annual use, so that the bearing capacity and the safety of the structure are reduced.
There are issued patents for reinforcement construction of a bolted ball node grid structure, such as CN204645702U discloses construction nodes for reinforcement of welded net rack bars and CN206468032U discloses a spatial grid structure bolted ball node spot welding reinforcement device. The method adopted by CN204645702U specifically comprises the steps of welding balls at two ends of a net rack steel pipe rod piece, welding a steel pipe of an outer lining pipe on the net rack steel pipe rod piece, and finally fixing the steel pipe of the outer lining pipe by using a hoop. The method adopted by CN206468032U is that high-strength bolts sequentially penetrate through the net rack steel pipe rod piece and the sleeve and then are fixed on the sleeve on the bolt ball joint, and then steel plates are used for wrapping, and two ends of each steel plate are respectively tightly attached to the bolt ball joint and the net rack steel pipe rod piece. The reinforcement effect of the above patents is not very desirable. The above-mentioned patent is mainly because the above-mentioned patent all adopts the outsourcing component to be connected with original structure part, and is great to the operation space demand of device, if the space is limited, then difficult to operate.
Disclosure of Invention
The invention aims to solve the problem that the connection between an external packing component and an original structure is very limited by an operation space in the prior art, and provides a device for repairing a bolt ball node by using carbon fibers and a repairing method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the device for repairing the bolt ball joint by using the carbon fiber comprises a first hoop clamping plate and a plurality of carbon fiber pieces, wherein the first hoop clamping plate is respectively fixed on a damaged net rack steel pipe rod piece and a healthy net rack steel pipe rod piece of the same bolt ball joint, and two sides of the carbon fiber pieces are respectively fixed on the corresponding two first hoop clamping plates.
The healthy net rack steel pipe rod piece is a net rack steel pipe rod piece with stress performance meeting preset requirements. Because the directions of other net rack steel pipe rod pieces on the bolt ball joints are different from those of the net rack steel pipe rod pieces with damages, the net rack steel pipe rod pieces provided with the first hoop clamping plates can directly or indirectly generate loads parallel to the axes of the net rack steel pipe rod pieces. The axis of the net rack steel pipe rod piece refers to the connecting line of the center points of all cross sections of the net rack steel pipe rod piece. The carbon fiber has high tensile strength, convenient construction, light dead weight, good corrosion resistance and durability. The carbon fiber piece is adopted to bear the stretching of other net rack steel pipe rod pieces on the bolt ball joint, the net rack structure is repaired, the load of cracking the net rack steel pipe rod pieces can be born partially, and the bearing capacity of the bolt ball joint is improved. The selection of healthy net rack steel pipe rod pieces is determined according to specific stress conditions or space position conditions, such as the tension side in a bending member is more effective. Compared with the prior art, the device has the advantages that the two ends of the carbon fiber piece are respectively connected with the damaged grid steel pipe rod piece and the grid steel pipe rod piece positioned on the same bolt ball joint, and the bearing capacity of the bolt ball joint is integrally enhanced. The selected healthy bars are determined according to the specific situation. In addition, the distance between the first hoop clamping plate and the bolt ball joint is adjustable, so that the installation in a narrower area can be avoided, and the bolt ball joint of the net rack is not limited by the construction operation space when the bolt ball joint of the net rack is repaired. The first hoop clamping plate is fixed on the coaxial net rack steel pipe rod piece, so that when the carbon fiber piece is stretched, the first flange plate cannot generate displacement, and the repairing and reinforcing effects are affected.
Through using this device, can repair the reinforcement to the damage rack, be not restricted by construction space to stably promoted the bearing capacity of grid structure's whole node. The adaptability of the construction site is improved, and the construction of the bolt ball joint of the damaged net rack is conveniently, quickly and efficiently reinforced.
Preferably, the carbon fiber pieces are strip-shaped fiber cloths and are in a stretched state.
The carbon fiber pieces are strip-shaped, can be cut according to the size of the position to be reinforced, and avoid waste, and the number and the distribution positions of the carbon fiber pieces are determined according to specific conditions. The adoption of carbon fiber cloth is more flexible and more free from the operation space than the adoption of other forms of carbon fiber pieces. And the distribution of the carbon fiber pieces can be arranged according to the position where reinforcement is needed. The carbon fiber piece is in a stretching state, namely prestress is applied to the carbon fiber piece, the carbon fiber piece is in a tightening state, and the tightening performance can be further improved. The degree of stretching is determined according to the specific situation.
Preferably, the carbon fiber member is stretched to a degree within the range of 10% to 30% in tensile elastic deformation.
The stretching degree is 10% -30% and is taken out according to experience, so that the carbon fiber piece can be ensured to be in an elastic stretching state in the range, and excessive stretching can be effectively avoided.
Preferably, the first hoop clamping plate further comprises a first flange plate, and first ribs are arranged on the first flange plate.
The first hoop clamping plate and the first flange plate are connected into a whole, so that the overall stability of the device is enhanced. The first reinforcement strip is favorable to guaranteeing first flange board perpendicular to first staple bolt splint to guarantee the fixed effect of first flange board, do benefit to the overall stability that promotes this device. The number and distribution of the first ribs are determined according to the specific situation.
Preferably, the first hoop clamping plate is axially provided with a through hole along the pipe network frame steel pipe rod, the carbon fiber piece is fixed in the through hole, a tight fixing block is arranged on the inner side of the carbon fiber piece, a guide bar is arranged on the tight fixing block, a hole groove is formed in the inner wall of the first hoop clamping plate, the guide bar is located inside the hole groove, and the guide bar is used for supporting the tight fixing block.
The inner side of the carbon fiber piece refers to the side of the carbon fiber piece facing the net rack steel pipe rod piece. The carbon fiber piece is fixed in the through hole, and the carbon fiber piece is easier to confirm the position and also is favorable to guaranteeing that the carbon fiber piece is parallel to the steel frame steel pipe member piece, and the carbon fiber piece needs to be in tensile state, if be fixed in on the inner wall and the outer wall of first staple bolt splint, can cause carbon fiber piece atress uneven when stretching, repair the effect of reinforcement can be discounted greatly. The tight piece that decides makes the carbon fiber spare hug closely more in the through-hole inner wall, does benefit to the position of fixed carbon fiber spare in the through-hole of first staple bolt splint. The guide bars are arranged on the fastening blocks and are arranged in the holes, so that the fastening blocks are prevented from generating displacement along the axial line of the net rack steel pipe rod piece in the through holes, and the whole fixing is facilitated.
Preferably, the device further comprises a hollow loop bar, wherein the hollow loop bar is positioned in a gap between the first hoop clamping plate and the net rack steel pipe rod piece, threads are arranged on the inner wall of the first hoop clamping plate, and threads corresponding to the first hoop clamping plate are arranged on the outer wall of the hollow loop bar.
Because be equipped with on the cavity loop bar outer wall with the corresponding screw thread of first staple bolt splint, and because the conducting bar is used for propping up tight piece, so at the in-process that cavity loop bar was fixed at the gap, the hollow loop bar forms the extrusion to the guide arm of tight piece to make tight piece press close to the inner wall of through-hole more, thereby strengthen fixed carbon fiber spare. And the screw thread is also convenient for field construction and installation.
A repairing method of an apparatus for repairing a bolted ball joint with carbon fiber, using an apparatus for repairing a bolted ball joint with carbon fiber as described above, comprising the steps of:
s1, respectively arranging and fixing first hoop clamping plates on a damaged net rack steel pipe rod piece and a healthy net rack steel pipe rod piece positioned at the same bolt ball node;
s2, arranging and fixing a second hoop clamping plate on the side, away from the bolt ball joint, of any one of the first hoop clamping plates, and arranging a jacking backing plate on the side, away from the bolt ball joint, of the second hoop clamping plate;
s3, connecting the two first hoop clamping plates and the second hoop clamping plates with carbon fiber pieces, wherein two ends of the carbon fiber pieces are finally fixed on the jacking backing plate and the first hoop clamping plates on the other side respectively;
s4, stretching the carbon fiber piece, and fixing the carbon fiber piece after stretching is completed, so that the carbon fiber piece is compressed by the two first hoop clamping plates;
s5, removing the second hoop clamping plate and the jacking backing plate to finish repairing.
By means of the movement of the jacking base plate, the carbon fiber pieces are integrally tensioned, and uneven stress of the carbon fiber pieces at different positions is avoided. The second hoop clamping plate and the jacking backing plate at the end part can be repeatedly used. The first hoop clamping plate on the other side specifically refers to a first hoop clamping plate arranged on the side different from the second hoop clamping plate. Before the carbon fiber piece is stretched, the two ends of the carbon fiber piece are fixed at the first hoop clamping plate arranged on the jacking backing plate and on the different sides of the second hoop clamping plate, and after the stretching is finished, the carbon fiber piece at the first hoop clamping plate on the same side as the second hoop clamping plate is fixed.
By using the construction method, the device is convenient to strengthen, the second hoop clamping plate and the jacking backing plate for tensioning can be repeatedly used for a plurality of times, and engineering cost is effectively controlled while technical effects are achieved. The construction method is simple to operate, convenient to operate by workers, short in repair time and convenient, rapid and efficient in construction of the prestressed carbon fiber reinforced concrete bolt ball joint with the damaged net rack.
Preferably, a rubber substance is filled in the gap between the first hoop clamping plate and the net rack steel pipe rod piece before step S4.
The rubber itself is elastic at room temperature and can be deformed greatly with a small force. The rubber material is used for temporarily compacting the carbon fiber piece by extruding the guide strip, so that the carbon fiber piece is prevented from displacement or uneven stress in the installation process, and the subsequent repairing effect is prevented from being influenced. And a resilient material between two rigid materials may enhance the tightening effect.
Preferably, a connecting piece is arranged between the step S3 and the step S4, two ends of the connecting piece are respectively connected with one end of a near-bolt ball node of the second hoop clamping plate and one end of a near-bolt ball node of the first hoop clamping plate on the same side, and the connecting piece is parallel to the net rack steel pipe rod piece.
The connecting piece is favorable for guaranteeing that the second hoop clamping plate is perpendicular to the axis of the net rack steel pipe rod piece, uneven tensioning is avoided when the carbon fiber piece is tensioned, and the repairing effect is favorable for guaranteeing.
Preferably, a jack is arranged between the first hoop clamping plate and the second hoop clamping plate, the jack takes the second hoop clamping plate as a base and the jacking backing plate as a top seat, and in step S4, the carbon fiber piece is controlled to stretch by jacking of the jack.
The carbon fiber piece is tensioned through the synergistic effect of the jack and the jacking backing plate, so that the tensile elastic deformation quantity of the carbon fiber piece can be effectively controlled, and the tensile degree is ensured to be in a corresponding tensile elastic deformation range. The number and the distribution position of the jacks are determined according to specific conditions. And because the jack can produce the power towards bolt ball node to the second staple bolt splint, the connecting piece can play a supporting role, does benefit to and guarantees when the jack rises, and the second staple bolt splint is in balanced state, does not produce the displacement.
Preferably, the displacement of the jacking pad is monitored in step S4.
Because the connecting piece and the jack can possibly produce shearing force to the second hoop clamping plate, whether the second hoop clamping plate deforms or not needs to be judged, and the tensioning can be timely adjusted if the difference occurs in the detection process, so that the carbon fiber piece is guaranteed to be stressed uniformly.
Compared with the prior art, the invention has the beneficial effects that:
1. through using this device, can repair the reinforcement to damage rack to stably promoted the bearing capacity of grid structure's whole node. And can adjust the position of first staple bolt splint according to the size of operating space, then can be applicable to the rack steel pipe member of different forms for the restoration contains the bolt ball node of damage rack and is not being restricted operating space, and the construction has improved job site's adaptability, realizes convenient, swift, efficient prestressing force carbon fiber reinforcement and contains damage rack bolt ball node construction. And the carbon fiber piece is stretched to achieve the effect of applying prestress, so that the fastening performance is improved.
2. The construction method is simple to operate, does not need an excessive operation space, is convenient for reinforcing the device for reinforcing the bolt ball joint by using the carbon fiber, can be repeatedly used for a plurality of times, effectively controls engineering cost while achieving technical effects, realizes convenient, quick and efficient construction of the prestressed carbon fiber reinforced bolt ball joint with the damaged net frame, and can effectively control the elastic deformation of the carbon fiber piece by using the jack, so that the carbon fiber piece is kept in the corresponding tensile elastic deformation.
Drawings
FIG. 1 is an apparatus for repairing a bolted ball joint with carbon fiber in example 1;
FIG. 2 is a cross-sectional view taken along the A-A plane of FIG. 1;
FIG. 3 is a schematic view showing the structure of a carbon fiber member in example 2;
FIG. 4 is a cross-sectional view of the B-B plane of FIG. 3;
fig. 5 is a construction step of a construction method of an apparatus for repairing a bolted ball joint with carbon fiber in example 2.
The marks in the figure: the steel pipe comprises a 1-net frame steel pipe rod piece, a 2-sleeve, a 3-bolt ball joint, a 4-first hoop clamping plate, a 41-fastening block, a 5-first flange plate, a 51-first reinforcing rib, a 6-hollow loop bar, a 61-countersunk conical surface, a 62-annular tube head, a 7-second hoop clamping plate, an 8-second flange plate, a 81-second reinforcing rib, a 9-jack, a 10-jacking backing plate, a 11-carbon fiber piece and a 12-connecting piece.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, the device comprises a first hoop clamping plate 4 and a plurality of carbon fiber pieces 11, wherein the first hoop clamping plate 4 is respectively fixed on a damaged net rack steel pipe rod piece 1 and a healthy net rack steel pipe rod piece 1 of the same bolt ball joint 3, and two sides of the carbon fiber pieces 11 are respectively fixed on the two corresponding first hoop clamping plates 4. The selection of the healthy net rack steel pipe rod piece 1 is determined according to specific conditions, and the healthy net rack steel pipe rod piece 1 with an included angle of 180 degrees with the damaged net rack steel pipe rod piece 1 is adopted in the embodiment. The net rack steel pipe rod piece 1 is connected with the bolt ball joint 3 through the sleeve 2. The first hoop clamping plate 4 is connected with two parts through bolts. The carbon fiber members 11 are strip-shaped fiber cloths and are all in a stretched state, and the stretching degree is determined according to specific conditions, and the stretching degree in the embodiment is within 10% -30% of stretching elastic deformation, as shown in fig. 2. The specific number and position distribution of the carbon fiber members 11 are determined according to actual conditions, and four carbon fiber members 11 are used in the present embodiment.
The first hoop clamping plate 4 further comprises a first flange plate 5, and a first reinforcing rib 51 is arranged on the first flange plate 5. The first flange plate 5 is a fixed plate in the form of a semicircular flange, as shown in fig. 2. The number and the position distribution of the first ribs 51 are shown according to specific situations, and four first ribs 51 are adopted in this embodiment, and the included angles between each first rib 51 and the connecting piece of the first flange plate 5 are 45 °, 135 °, 225 ° and 315 °, as shown in fig. 2.
The first anchor ear splint 4 is gone up along pipe network frame steel pipe member 1 axial and is equipped with the through-hole, and carbon fiber spare 11 is fixed in the through-hole, is equipped with on the carbon fiber spare 11 inboard tightly decides piece 41, is equipped with the conducting bar on tightly deciding piece 41, is equipped with the hole groove on the first anchor ear splint 4 inner wall, and the conducting bar is located hole inslot portion, and the conducting bar is used for supporting tightly decides piece 41, as shown in fig. 2. In this embodiment, the guide bar protrudes from the inner wall of the first hoop clamping plate 4. Still include the cavity loop bar, the cavity loop bar is located the gap between first staple bolt splint and the rack steel pipe member, is equipped with the screw thread on the first staple bolt splint inner wall, is equipped with the screw thread corresponding with first staple bolt splint on the cavity loop bar outer wall. One end of the hollow sleeve rod 6 is provided with a countersunk conical surface 61, and the other end is provided with an annular tube head 62. The first flange plate 5 is located on the hollow stem 6. The form of the annular tube head 62 is determined by the particular circumstances, and the present embodiment takes the form of an external hexagon.
Example 2
As shown in fig. 3 to 5, a repairing method of an apparatus for repairing a bolted ball joint with carbon fiber, using an apparatus for repairing a bolted ball joint with carbon fiber of example 1, comprises the steps of:
s1, respectively arranging and fixing first hoop clamping plates 4 on the damaged net rack steel pipe rod piece 1 and the healthy net rack steel pipe rod piece 1 positioned at the same bolt ball node 3;
s2, arranging and fixing a second hoop clamping plate 7 on the side, away from the bolt ball joint 3, of any first hoop clamping plate 4, and arranging a jacking backing plate 10 on the side, away from the bolt ball joint 3, of the second hoop clamping plate 7;
s3, connecting the two first hoop clamping plates 4 and the second hoop clamping plate 7 with a carbon fiber piece 11, and finally fixing two ends of the carbon fiber piece 11 on the jacking backing plate 10 and the first hoop clamping plate 4 on the other side respectively;
s4, stretching the carbon fiber piece 11, and fixing the carbon fiber piece 11 after stretching is completed, so that the carbon fiber piece 11 is compressed by the two first hoop clamping plates 4;
s5, removing the second hoop clamping plate 7 and the jacking backing plate 10 to finish repair.
The second hoop clamping plate 7 comprises a second flange plate 8. The second flange plate 8 is provided with second ribs 81 similar to the first ribs 51. In step S1, the first flange plate 5 is used for fixing and is provided on both sides of the first anchor clamp plate 4, as shown in fig. 3.
Before step S4, a rubber material is filled in the gap between the first anchor clamp plate 4 and the net rack steel pipe rod piece 1. In this example, a smooth rubber is filled.
And a connecting piece 12 is arranged between the step S3 and the step S4, two ends of the connecting piece 12 are respectively connected with one end of a near-bolt ball node 3 of the second hoop clamping plate 7 and the first hoop clamping plate 4 on the same side, and the connecting piece 12 is parallel to the net rack steel pipe rod piece 1. The position and the number of the connecting pieces are determined according to the specific situation, and in this embodiment, two ends of the connecting line perpendicular to the connecting plate of the second hoop clamping plate 7 are adopted, as shown in fig. 3.
A jack 9 is arranged between the first hoop clamping plate 4 and the second hoop clamping plate 7, the jack 9 takes the second hoop clamping plate 7 as a base and the jacking base plate 10 as a top seat, and in the step S4, the carbon fiber piece 11 is controlled to stretch by jacking through the jack 9. The number and distribution of the jacks 9 are determined according to specific situations, in this embodiment, four jacks 9 are adopted, and the included angles between each jack 9 and the connecting piece of the second hoop clamping plate 7 are 45 °, 135 °, 225 ° and 315 °, as shown in fig. 4.
In step S4, the displacement of the jacking pad 10 is monitored, and if a difference occurs in the monitoring process, the tensioning can be adjusted in time. The present embodiment employs the same displacement sensor for monitoring.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A method for repairing a bolt ball node by using carbon fibers is characterized in that,
the device for repairing the bolt ball joint by using the carbon fiber comprises a first hoop clamping plate (4) and a plurality of carbon fiber pieces (11), wherein the first hoop clamping plate (4) is respectively fixed on a damaged net rack steel pipe rod piece (1) and a healthy net rack steel pipe rod piece (1) of the same bolt ball joint (3), and two ends of the carbon fiber pieces (11) are respectively fixed on the two corresponding first hoop clamping plates (4);
the carbon fiber pieces (11) are strip-shaped fiber cloths and are in a stretching state;
the method comprises the following steps:
s1, respectively arranging and fixing first hoop clamping plates (4) on a damaged net rack steel pipe rod piece (1) and a healthy net rack steel pipe rod piece (1) positioned at the same bolt ball node (3);
s2, a second hoop clamping plate (7) is arranged and fixed on the side, away from the bolt ball joint (3), of any one of the first hoop clamping plates (4), and a jacking backing plate (10) is arranged on the side, away from the bolt ball joint (3), of the second hoop clamping plate (7);
s3, connecting the two first hoop clamping plates (4) and the second hoop clamping plates (7) with a carbon fiber piece (11), wherein two ends of the carbon fiber piece (11) are finally fixed on the jacking backing plate (10) and the first hoop clamping plates (4) on the other side respectively;
s4, stretching the carbon fiber piece (11), and fixing the carbon fiber piece (11) after stretching is completed, so that the carbon fiber piece (11) is pressed by the two first hoop clamping plates (4);
s5, removing the second hoop clamping plate (7) and the jacking backing plate (10) to finish repair.
2. A method of repairing bolted ball joints with carbon fibre according to claim 1, characterised in that prior to step S4 a rubber material is filled in the gap between the first hoop clamp plate (4) and the net rack steel pipe rod (1).
3. A method for repairing a bolted ball joint with carbon fibers according to claim 1, wherein a connecting piece (12) is arranged between the step S3 and the step S4, two ends of the connecting piece (12) are respectively connected with one end, close to the bolted ball joint (3), of the second hoop clamping plate (7) and the first hoop clamping plate (4) on the same side, and the connecting piece (12) is parallel to the net rack steel pipe rod piece (1).
4. A method of repairing bolted ball joints with carbon fibres as claimed in claim 3, characterised in that a jack (9) is provided between the first hoop clamp (4) and the second hoop clamp (7), the jack (9) being seated on the second hoop clamp (7) and the jacking pad (10) being seated on the jacking seat, the tensioning of the carbon fibre member (11) being controlled in step S4 by jacking of the jack (9).
5. A method of repairing bolted ball joints with carbon fibres according to claim 1, characterised in that the displacement of the jacking pad (10) is monitored in step S4.
6. A method for repairing a bolted ball joint with carbon fibres as claimed in claim 1, wherein said first hoop clamping plate (4) further comprises a first flange plate (5), said first flange plate (5) being provided with first reinforcing ribs (51).
7. A method for repairing a bolt ball joint by using carbon fibers according to claim 1, wherein the first hoop clamping plate (4) is provided with a through hole along the axial direction of the net rack steel pipe rod piece (1), the carbon fiber piece (11) is fixed in the through hole, a fastening block (41) is arranged on the inner side of the carbon fiber piece (11), a guide bar is arranged on the fastening block (41), a hole groove is formed in the inner wall of the first hoop clamping plate (4), the guide bar is positioned in the hole groove, and the guide bar is used for supporting the fastening block (41).
8. The method for repairing the bolt ball joint by using the carbon fiber according to claim 7, further comprising a hollow loop bar (6), wherein the hollow loop bar (6) is positioned in a gap between the first hoop clamping plate (4) and the net rack steel pipe rod piece (1), threads are arranged on the inner wall of the first hoop clamping plate (4), and threads corresponding to the first hoop clamping plate (4) are arranged on the outer wall of the hollow loop bar (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211537704.3A CN115929068B (en) | 2022-12-02 | 2022-12-02 | Device for repairing bolt ball node by carbon fiber and repairing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211537704.3A CN115929068B (en) | 2022-12-02 | 2022-12-02 | Device for repairing bolt ball node by carbon fiber and repairing method thereof |
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| CN115929068B true CN115929068B (en) | 2023-09-05 |
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| CN115929068A (en) | 2023-04-07 |
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