CN216811704U - Assembled tunnel segment anti-deformation reinforcing device - Google Patents
Assembled tunnel segment anti-deformation reinforcing device Download PDFInfo
- Publication number
- CN216811704U CN216811704U CN202220482110.6U CN202220482110U CN216811704U CN 216811704 U CN216811704 U CN 216811704U CN 202220482110 U CN202220482110 U CN 202220482110U CN 216811704 U CN216811704 U CN 216811704U
- Authority
- CN
- China
- Prior art keywords
- tunnel
- connecting rod
- reinforcing ring
- reinforcing
- bolt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 132
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 12
- 230000006378 damage Effects 0.000 description 6
- 238000011900 installation process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model discloses an assembled tunnel segment deformation-resistant reinforcing device which comprises a reinforcing ring, connecting nodes, connecting rods and bolts, wherein the reinforcing ring is fixedly connected with the connecting nodes; the connecting nodes are arranged on the reinforcing ring, a bolt hole is reserved in each connecting node, and the reinforcing ring is connected with the tunnel segment by using a bolt; the reinforcing ring is connected with the connecting rod through a connecting node; the reinforcing ring is perpendicular with the tunnel central line, and the connecting rod is parallel with the tunnel axis, and tunnel section of jurisdiction circumferential weld need be avoided in the installation of reinforcing ring, and the longitudinal joint of tunnel section of jurisdiction need be avoided in the installation of bolt. The utility model has the advantages of high degree of mechanization, simple and convenient installation, strong flexibility, effective reinforcement of various duct pieces, good reinforcement effect, strong comprehensive performance and the like; the utility model can reinforce the tunnel and ensure the safety and stability of the tunnel.
Description
Technical Field
The utility model belongs to the technical field of shield tunnel segment reinforcement, and particularly relates to an assembled tunnel segment deformation-resistant reinforcing device.
Background
In recent years, subways have become an important component of urban rail traffic. The shield construction method has the advantages of small influence on the surrounding environment, wide application range of stratum and the like, and becomes a main construction method for urban subway construction. Although the shield tunnel has high safety performance, the phenomenon of segment damage often occurs in the construction and operation processes, and the phenomenon is mainly divided into local damage and overall large structural deformation. When local damage such as cracking, water leakage and the like occurs, the driving safety and the normal operation of the interval tunnel are influenced; when the integral large deformation such as segment deformation and segment dislocation occurs, the safety and stability of the tunnel structure are greatly threatened. Therefore, a simple and effective tunnel segment reinforcing method is particularly important.
The method for reinforcing the tunnel segment is always concerned, and a plurality of scholars at home and abroad research the method for reinforcing the tunnel segment. At present, the method for reinforcing the duct piece mainly repairs the damaged part of the duct piece, or materials such as a steel plate and the like are adhered to the weak part of the duct piece to enable the duct piece to be connected with the duct piece into a whole, so that the rigidity of the duct piece is improved. However, as the existing tunnel engineering technology is more and more complex, various duct piece types are developed endlessly, so that the duct pieces are more damaged and the damage reason is complex. Often, analysis is carried out according to the actual engineering situation, and then a reinforcing and repairing scheme is determined. This not only makes the repair difficult, but also causes problems such as a delay in the construction period. Particularly, in the case of severe damage to the duct piece, a method for timely and effectively reinforcing the duct piece is very important. The tunnel segment reinforcing device is used as a segment reinforcing method, and is very suitable for solving the problems of tunnel segment damage or weakness and the like on the basis of ensuring safety and high efficiency. The device for reinforcing the tunnel duct pieces is not yet available and needs to be further developed.
In summary, the existing tunnel segment reinforcing method has the problems of low construction efficiency, high construction difficulty, large use restriction, unstable reinforcing effect and the like, and a simple and efficient tunnel segment reinforcing method is urgently needed to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a convenient and efficient anti-deformation tunnel segment reinforcing device and a construction method thereof.
The spliced type tunnel segment deformation-resistant reinforcing device consists of reinforcing units, wherein each reinforcing unit comprises 1 reinforcing ring, 1 top connecting rod, 4 side connecting rods, 1 bottom connecting rod, 1 top connecting node, 4 side connecting nodes, 1 bottom connecting node, 1 top bolt, 4 side bolts and 1 bottom bolt; the reinforcing ring is arranged on the tunnel pipe sheet; the top connecting node is arranged on the top connecting rod, the side connecting node is arranged on the side connecting rod, and the bottom connecting node is arranged on the bottom connecting rod; the reinforcing ring is connected with the tunnel segment through 1 top bolt, 4 side bolts and 1 bottom bolt; the reinforcing rings are connected with the adjacent reinforcing rings through 1 top connecting rod, 4 side connecting rods and 1 bottom connecting rod; the reinforcing ring is connected through top connected node with the top connecting rod, and the reinforcing ring is connected through side connected node with the side connecting rod, and the reinforcing ring is connected through bottom connected node with the bottom connecting rod.
Furthermore, the reinforcing rings are arranged corresponding to the tunnel pipe pieces, one ring pipe piece is provided with one reinforcing ring, and the diameter of each reinforcing ring is the same as the inner diameter of each tunnel pipe piece; the reinforcing ring is tightly attached to the inner cambered surface of the tunnel segment, distributed in the center of each segment and perpendicular to the central axis of the tunnel, and avoids the circular seam of the tunnel segment; the top connecting rod, the side connecting rod and the bottom connecting rod are distributed on the central axis of the reinforcing ring; the material of the reinforcing ring is the same as that of the top connecting rod, the side connecting rod and the bottom connecting rod, the reinforcing ring is connected with the top connecting node, the side connecting node and the bottom connecting node through the top connecting node, the side connecting node and the bottom connecting node, and the reinforcing ring is parallel to the central axis of the tunnel; a circular bolt hole is reserved on each connecting node and used for connecting the reinforcing ring and the tunnel segment.
Furthermore, the reinforcing rings are connected with the tunnel segments through top bolts, side bolts and bottom bolts, and each ring segment is respectively provided with 1 top bolt, 4 side bolts and 1 bottom bolt to avoid longitudinal seams of the tunnel segments; the bolt holes are reserved in the centers of the top connecting node, the side connecting node and the bottom connecting node; top bolt, side bolt and bottom bolt run through the strengthening ring and are connected with the tunnel section of jurisdiction, avoid running through the tunnel section of jurisdiction.
The utility model has the following special and beneficial effects:
1. high mechanization degree and simple installation
The anti-deformation tunnel segment reinforcing device comprises a reinforcing ring, a connecting rod, a connecting node and a bolt. The method comprises the steps of firstly measuring the inner diameter and the length of a tunnel segment area needing to be reinforced, and evaluating the field working condition. And manufacturing parts with corresponding specifications in the engineering according to the requirements, and then conveying the parts to a construction site for simple assembly. The segment reinforcing device is high in mechanization degree, few in part types, labor-saving and convenient to construct.
2. Wide application range and strong flexibility
The utility model is assembled by reinforcing units, has a multi-section adjustable supporting range, and can be suitable for tunnels with different diameters and different lengths. The method can be well applied to the local damage of the tunnel segment or the overall deformation of the structure.
3. Good reinforcing effect and strong comprehensive performance
Among the resistance to deformation tunnel section of jurisdiction reinforcing apparatus, reinforcing ring and connecting rod form the triangle state, and the structure is very stable. The reinforcing ring is connected with the tunnel pipe piece through bolts, the reinforcing ring is connected with the connecting rods through connecting nodes, the device is connected into a whole, and integrity and rigidity are good. And in the installation process of the device, the circular seams and the longitudinal seams of the tunnel segments are avoided, and the reinforcing effect of the device is further ensured.
Drawings
FIG. 1 is a schematic structural diagram of a tunnel segment reinforcing apparatus;
FIG. 2 is a schematic longitudinal section of a tunnel segment reinforcement apparatus;
FIG. 3 is a schematic cross-sectional view of a tunnel segment reinforcing apparatus;
description of reference numerals: 1-a tunnel segment; 2-a first reinforcement ring; 3-a second reinforcement ring; 4-a top connecting rod; 5-a lateral connecting rod; 6-bottom connecting rod; 7-top connection node; 8-side connection node; 9-bottom connection node; 10-reserving bolt holes at the top; 11-reserving bolt holes on the side surface; 12-reserving bolt holes at the bottom; 13-top bolt; 14-side bolt; 15-bottom bolt.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the utility model. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As shown in fig. 1, the present invention provides an anti-deformation tunnel segment reinforcing apparatus, which is composed of a reinforcing unit, and includes 1 first reinforcing ring 2, 1 top connecting rod 4, 4 side connecting rods 5, 1 bottom connecting rod 6, 1 top connecting node 7, 4 side connecting nodes 8, 1 bottom connecting node 9, 1 top bolt 13, 4 side bolts 14, and 1 bottom bolt 15; the first reinforcing ring 2 is arranged on the tunnel segment 1; the top connecting node 7 is arranged on the top connecting rod 4, the side connecting node 8 is arranged on the side connecting rod 5, and the bottom connecting node 9 is arranged on the bottom connecting rod 6; the first reinforcing ring 2 is connected with the tunnel segment 1 through 1 top bolt 13, 4 side bolts 14 and 1 bottom bolt 15; the first reinforcing ring 2 is connected with the adjacent second reinforcing ring 3 through 1 top connecting rod 4, 4 side connecting rods 5 and 1 bottom connecting rod 6; the first reinforcing ring 2 is connected with the top connecting rod 4 through a top connecting node 7, the first reinforcing ring 2 is connected with the side connecting rod 5 through a side connecting node 8, the first reinforcing ring 2 is connected with the bottom connecting rod 6 through a bottom connecting node 9, and a bolt hole is reserved in the middle of each connecting node; in the installation process, the diameter of the first reinforcing ring 2 is determined according to the inner diameter of the tunnel segment 1, namely the outer diameter of the first reinforcing ring 2 is the same as the inner diameter of the tunnel segment 1; connecting the first reinforcing ring 2 with the tunnel segment 1 by using bolts; the first reinforcing ring 2 is tightly connected with the top connecting rod 4, the side connecting rod 5 and the bottom connecting rod 6 through the top connecting node 7, the side connecting node 8 and the bottom connecting node 9 to form a reinforcing unit; and finally, connecting the reinforcing unit to the tunnel section needing to be reinforced to form a whole, thereby reinforcing the tunnel.
As shown in fig. 2, the first reinforcing rings 2 are arranged corresponding to the tunnel segments 1, each ring segment is provided with one reinforcing ring, and in the process of arranging the reinforcing rings, attention needs to be paid to avoiding the annular seams of the tunnel segments so as to ensure the reinforcing effect of the device; in the installation process, the first reinforcing ring 2 needs to be tightly attached to the inner cambered surface of the tunnel segment 1, distributed in the center of each segment and perpendicular to the central axis of the tunnel; the top connecting node 7, the side connecting node 8 and the bottom connecting node 9 are distributed on the central axis of the first reinforcing ring 2, and the longitudinal seams of the tunnel segments need to be avoided; the first reinforcing ring 2 is made of the same material as the top connecting rod 4, the side connecting rod 5 and the bottom connecting rod 6, is connected through a top connecting node 7, a side connecting node 8 and a bottom connecting node 9, and is parallel to the central axis of the tunnel; a circular bolt hole is reserved on each connecting node, and the bolt hole is located in the center of the connecting node and used for connecting the reinforcing ring and the tunnel segment.
As shown in fig. 3, the first reinforcing ring 2 is tightly attached to the intrados of the tunnel segment 1, and the first reinforcing ring 2 and the tunnel segment 1 are connected by top bolts 13, side bolts 14 and bottom bolts 15; each ring segment is respectively provided with 1 top bolt 13, 4 side bolts 14 and 1 bottom bolt 15, and the longitudinal seam of the tunnel segment is avoided; the top bolts 13, the side bolts 14 and the bottom bolts 15 penetrate through the first reinforcing ring 2 to be connected with the tunnel segment 1, and attention needs to be paid to avoid penetrating through the tunnel segment 1; the whole tunnel segment reinforcing device is connected with the tunnel segment into a whole through bolts, so that the tunnel is prevented from deforming; and the reinforcing ring, the connecting rod, the connecting node and the bolt of the reinforcing device can be prefabricated, so that the mounting is simple and convenient, and various tunnel constructions are facilitated.
The first embodiment is as follows:
the size of the device related to the utility model can be flexibly adjusted according to the selected simulated engineering actual situation. The inner diameter of a tunnel segment in simulation engineering is 10m, the length of a tunnel section needing to be reinforced is 100m, the length of each ring of segment is 2m, and each ring of segment is composed of 1 top sealing block, 2 adjacent blocks and 3 standard blocks. The outer diameter of each reinforcing ring is 10m, the distance between every two adjacent reinforcing rings is 2m, and the length of each connecting rod is 2 m; the width of each reinforcing ring is set to be 10cm, the thickness of each reinforcing ring is set to be 3cm, each reinforcing ring is provided with 6 connecting nodes, namely, one connecting node is arranged at the position of each reinforcing ring corresponding to 1 top sealing block, 2 adjacent connecting blocks and 3 standard blocks respectively, and longitudinal seams of tunnel segments are avoided; in the engineering, a top connecting node, a side connecting node and a bottom connecting node are completely the same, and a circular bolt hole with the diameter of 22mm is reserved in each connecting node and used for installing bolts; the connecting rod is fixed through the connecting node, the length of the connecting rod is 2m, the width of the connecting rod is 6cm, and the thickness of the connecting rod is 2 cm; a total of 51 reinforcement rings, 300 connecting rods, 306 connecting nodes and 306 bolts are required.
During the specific construction, the following construction steps are adopted:
s1, measuring tunnel parameters: measuring the length of a tunnel section to be reinforced and measuring the inner diameter of a segment in the tunnel section;
s2, determining the number of components: the number of the first reinforcing rings 2 is equal to the number of pipe pieces in a tunnel section needing to be reinforced, the number of the connecting nodes is equal to the number of the reinforcing rings multiplied by 6, the number of the connecting rods is equal to the number of the connecting nodes reduced by 6, and the number of the bolts is equal to the number of the connecting nodes;
s3, manufacturing a reinforcing device: manufacturing a reinforcing device according to the measured parameters, wherein the outer diameter of the first reinforcing ring 2 is equal to the inner diameter of the tunnel segment 1, the width of the reinforcing ring is 10cm, the thickness of the reinforcing ring is 3cm, the length of each connecting rod is 2m, the width of each connecting rod is 6cm, the thickness of each connecting rod is 2cm, a circular bolt hole is reserved in each connecting node, and the diameter of each bolt hole is 22 mm;
s4, mounting a reinforcing device: the first reinforcing rings 2 are arranged corresponding to the tunnel segments 1, each ring segment is provided with one reinforcing ring, and the annular seams of the tunnel segments need to be avoided in the process of arranging the reinforcing rings so as to ensure the reinforcing effect of the device; the first reinforcing ring 2 needs to be tightly attached to the inner cambered surface of the tunnel segment 1, distributed in the center of each segment and perpendicular to the central axis of the tunnel; the first reinforcing ring 2 and the tunnel segment 1 are connected through a top bolt 13, a side bolt 14 and a bottom bolt 15; each ring segment is respectively provided with 1 top bolt 13, 4 side bolts 14 and 1 bottom bolt 15, and the longitudinal seam of the tunnel segment is avoided; the top connecting node 7, the side connecting node 8 and the bottom connecting node 9 are distributed on the central axis of the first reinforcing ring 2, and the longitudinal seams of the tunnel segments need to be avoided; the first reinforcing ring 2 is made of the same material as the top connecting rod 4, the side connecting rod 5 and the bottom connecting rod 6, is connected through a top connecting node 7, a side connecting node 8 and a bottom connecting node 9, and is parallel to the central axis of the tunnel; a circular bolt hole is reserved in each connecting node, is positioned in the center of the connecting node and is used for connecting the first reinforcing ring 2 and the tunnel segment 1; first reinforcement ring 2 hugs closely the intrados of tunnel segment 1, and top bolt 13, side bolt 14 and bottom bolt 15 run through first reinforcement ring 2 and are connected with tunnel segment 1, need pay attention to avoid running through tunnel segment 1.
Claims (3)
1. The utility model provides a resistance to deformation reinforcing apparatus of pin-connected panel tunnel segment which characterized in that: the reinforcing device comprises a reinforcing unit, wherein the reinforcing unit comprises 1 first reinforcing ring (2), 1 top connecting rod (4), 4 side connecting rods (5), 1 bottom connecting rod (6), 1 top connecting node (7), 4 side connecting nodes (8), 1 bottom connecting node (9), 1 top bolt (13), 4 side bolts (14) and 1 bottom bolt (15); the first reinforcing ring (2) is arranged on the tunnel segment (1); the top connecting node (7) is arranged on the top connecting rod (4), the side connecting node (8) is arranged on the side connecting rod (5), and the bottom connecting node (9) is arranged on the bottom connecting rod (6); the first reinforcing ring (2) is connected with the tunnel segment (1) through 1 top bolt (13), 4 side bolts (14) and 1 bottom bolt (15); the first reinforcing ring (2) is connected with the adjacent second reinforcing ring (3) through 1 top connecting rod (4), 4 side connecting rods (5) and 1 bottom connecting rod (6); first reinforcement ring (2) are connected through top connected node (7) with top connecting rod (4), and first reinforcement ring (2) are connected through side connected node (8) with side connecting rod (5), and first reinforcement ring (2) are connected through bottom connected node (9) with bottom connecting rod (6).
2. The assembled tunnel segment deformation-resistant reinforcing device of claim 1, wherein: the first reinforcing ring (2) is arranged corresponding to the tunnel segment (1), one ring tube piece is provided with one reinforcing ring, and the diameter of the first reinforcing ring (2) is the same as the inner diameter of the tunnel segment (1); the first reinforcing ring (2) is tightly attached to the inner cambered surface of the tunnel segment (1) and distributed in the center of each segment, and the first reinforcing ring (2) is perpendicular to the central axis of the tunnel to avoid the annular seam of the tunnel segment; the top connecting rod (4), the side connecting rod (5) and the bottom connecting rod (6) are distributed on the central axis of the first reinforcing ring (2); the first reinforcing ring (2) is made of the same material as the top connecting rod (4), the side connecting rod (5) is made of the same material as the bottom connecting rod (6), is connected through a top connecting node (7), a side connecting node (8) and a bottom connecting node (9), and is parallel to the central axis of the tunnel; a circular bolt hole is reserved in each connecting node and used for connecting the first reinforcing ring (2) and the tunnel segment (1).
3. The assembled tunnel segment deformation-resistant reinforcing device of claim 1, which is characterized in that: the first reinforcing ring (2) is connected with the tunnel segment (1) through top bolts (13), side bolts (14) and bottom bolts (15), and each ring segment is provided with 1 top bolt (13), 4 side bolts (14) and 1 bottom bolt (15) respectively to avoid a longitudinal seam of the tunnel segment; the bolt holes are reserved in the centers of the top connecting node (7), the side connecting node (8) and the bottom connecting node (9); top bolt (13), side bolt (14) and bottom bolt (15) run through first reinforcing ring (2) and are connected with tunnel section of jurisdiction (1), avoid running through tunnel section of jurisdiction (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202220482110.6U CN216811704U (en) | 2022-03-07 | 2022-03-07 | Assembled tunnel segment anti-deformation reinforcing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202220482110.6U CN216811704U (en) | 2022-03-07 | 2022-03-07 | Assembled tunnel segment anti-deformation reinforcing device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN216811704U true CN216811704U (en) | 2022-06-24 |
Family
ID=82045863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202220482110.6U Expired - Fee Related CN216811704U (en) | 2022-03-07 | 2022-03-07 | Assembled tunnel segment anti-deformation reinforcing device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN216811704U (en) |
-
2022
- 2022-03-07 CN CN202220482110.6U patent/CN216811704U/en not_active Expired - Fee Related
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111335139A (en) | Temporary connection structure for steel pipe arch ring segments | |
CN113235731A (en) | Floor position adjustable assembled welding clean shot node reinforcing apparatus | |
CN109441490B (en) | Quick-mounting and dismounting stacked shield modular steel support reinforcing structure | |
CN216811704U (en) | Assembled tunnel segment anti-deformation reinforcing device | |
CN218969809U (en) | Quick assembled closed box culvert structure | |
CN209873859U (en) | Waterproof sealing structure of corrugated steel pipe gallery | |
CN207583384U (en) | A kind of tunnel liner Steel Corrugated Pipes for Making assembly plate | |
CN111173033A (en) | Prefabricated pipe gallery structure and pipe jacking method construction method thereof | |
CN209229222U (en) | A kind of novel self-locking stainless steel inner lining tube for pipeline rehabilitation | |
CN212000574U (en) | Temporary connection structure for steel pipe arch ring segments | |
CN212427206U (en) | Assembled underground pipe gallery | |
CN212427205U (en) | Assembled underground pipe gallery is connected to dry-type | |
CN212563268U (en) | Grid type steel-concrete combined roof pipe structure | |
CN211421160U (en) | Assembled transmission line shaft tower basis | |
CN211397599U (en) | Steel pipe and tunnel for laying steel pipe | |
CN210529966U (en) | Super-huge steel structure connecting device | |
CN111980065A (en) | Assembled underground pipe gallery and connecting method thereof | |
CN221591005U (en) | Tunnel maintenance device | |
CN111119949A (en) | Steel pipe, tunnel and construction method for laying steel pipe in tunnel | |
CN220394607U (en) | Steel-concrete pipe piece suitable for oversized-diameter open caisson | |
CN111519635A (en) | Circular working pit supporting member and installation and construction process thereof | |
CN216741514U (en) | Combined type underground excavation shield steel ring | |
CN110805067B (en) | Pipe gallery and construction method | |
CN221196383U (en) | Underground pipeline suspension protection device | |
CN217735490U (en) | Pipe piece circumferential supporting device for small clear distance tunnel between subway shield zones |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220624 |
|
CF01 | Termination of patent right due to non-payment of annual fee |