CN113605249A - Monitoring method for steel strand pulling construction in prestressed structure corrugated pipe - Google Patents
Monitoring method for steel strand pulling construction in prestressed structure corrugated pipe Download PDFInfo
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- CN113605249A CN113605249A CN202111060916.2A CN202111060916A CN113605249A CN 113605249 A CN113605249 A CN 113605249A CN 202111060916 A CN202111060916 A CN 202111060916A CN 113605249 A CN113605249 A CN 113605249A
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- steel strand
- corrugated pipe
- wireless probe
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention provides a monitoring method for strand pulling construction of a steel strand in a prestressed structure corrugated pipe, which comprises the following steps: s1, arranging the wireless probe on the steel strand, and continuously detecting the contact position of the steel strand and the corrugated pipe in the moving process by using the wireless probe; s2, placing the steel strand into a reeving machine, and stabilizing the steel strand by using the reeving machine; s3, performing data connection on the central processing unit and the reeving machine, and performing data connection on the central processing unit and the wireless probe; s4, driving the steel strand to penetrate through the corrugated pipe by using a rope penetrating machine, and reading the detection data of the wireless probe in real time by using a central processing unit; and S5, according to the data detected by the wireless probe, the real-time adjustment of the threading speed of the steel strand of the reeving machine is realized by using the central processing unit. The wireless probe is arranged at the front end of the steel strand and connected with the central processing unit to carry out real-time monitoring on the steel strand penetrating in the corrugated pipe through the external display, so that the integrity of the corrugated pipe is better ensured.
Description
Technical Field
The invention belongs to the field of prestressed structures, and particularly relates to a monitoring method for strand pulling construction of a steel strand in a corrugated pipe with a prestressed structure.
Background
The prestress technology is mainly used for taking preventive control measures in advance for parts which can generate stress in engineering, and preventing deformation and structural damage caused by the fact that the structure of the engineering is changed when the engineering is subjected to the action of external force. Therefore, stress is constructed in the stress module in advance to resist the destructive action of external stress. In bridge engineering, tensile stress is mainly constructed in advance for modules which can be subjected to external load in use, so that strong pressure and tensile force brought by the external load are reduced, the generation of concrete cracks can be effectively delayed, and the engineering quality is improved. The corrugated pipe is easily damaged in the process of using the strand pulling machine to pull the corrugated pipe, so that the prestressed steel strand tensioning and the pore pressing are influenced by the fact that the pore passage is blocked by cement slurry.
Disclosure of Invention
In view of the above, the present invention aims to provide a monitoring method for strand pulling construction of a steel strand in a corrugated pipe with a prestressed structure, so as to solve the problem that the corrugated pipe is easily damaged when the steel strand is pulled by a strand pulling machine.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for monitoring steel strand pulling construction in a prestressed structure corrugated pipe comprises the following steps:
s1, arranging the wireless probe on the steel strand, and continuously detecting the contact position of the steel strand and the corrugated pipe in the moving process by using the wireless probe;
s2, placing the steel strand into a reeving machine, and stabilizing the steel strand by using the reeving machine;
s3, performing data connection on the central processing unit and the reeving machine, and performing data connection on the central processing unit and the wireless probe;
s4, driving the steel strand to penetrate through the corrugated pipe by using a rope penetrating machine, and reading the detection data of the wireless probe in real time by using a central processing unit;
and S5, according to the data detected by the wireless probe, the real-time adjustment of the threading speed of the steel strand of the reeving machine is realized by using the central processing unit, and the corrugated pipe is ensured to be complete and lossless.
Further, in step S1, the wireless probe is a wireless camera.
Further, in step S5, the central processing unit is further in data connection with the display; the display is used for displaying the picture transmitted to the central processing unit by the wireless probe in real time, and the speed of the reeving machine for reeving the steel strand is adjusted through the picture displayed by the display.
Further, in the step S1, the wireless probe is detachably mounted at the front end of the steel strand, and a detachable protective cover is disposed on the wireless probe.
Furthermore, the safety cover is the toper structure, and the cone end of safety cover sets up towards the steel strand wires front end, and wireless probe corresponds the position setting between safety cover cone end and the steel strand wires front end.
Furthermore, a clamping piece matched with the steel strand is arranged on the wireless probe.
Furthermore, the safety cover is made of elastic rubber materials, and a damping support ring matched with the steel strand is arranged in the safety cover.
Furthermore, the protective cover is provided with an arc surface part in sliding fit with the corrugated pipe.
Compared with the prior art, the method for monitoring the strand pulling construction of the steel strand in the corrugated pipe with the prestressed structure has the following advantages:
the wireless probe is arranged at the front end of the steel strand, is connected with the central processing unit and is used for monitoring the steel strand penetrating in the corrugated pipe in real time by the external display, the condition in the corrugated pipe is transmitted to the external display by the steel strand front end probe through the central processing unit, and the speed of the steel strand penetrating is regulated and controlled at any time according to the condition in the corrugated pipe, so that the integrity of the corrugated pipe is better ensured, and the construction quality of prestress tensioning is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a steel strand pulling process in a monitoring method for a steel strand pulling construction in a prestressed structural corrugated pipe according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless probe at the front end of a steel strand in a monitoring method for strand pulling construction of a steel strand in a corrugated pipe with a prestressed structure according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of fig. 2.
Description of reference numerals:
1. a rope threading machine; 2. a central processing unit; 3. a display; 4. steel strand wires; 5. a bellows; 6. a wireless probe; 7. a protective cover; 8. an arc surface portion; 9. a guide cap; 10. a clamping member; 11. connecting sleeves; 12. shock attenuation support ring.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A method for monitoring the strand pulling construction of a steel strand in a prestressed structural corrugated pipe, as shown in figures 1 to 3, comprises the following steps:
s1, arranging the wireless probe 6 on the steel strand 4, and continuously detecting the contact position of the steel strand 4 and the corrugated pipe 5 in the moving process by using the wireless probe 6;
s2, placing the steel strand 4 into the reeving machine 1, and stabilizing the steel strand 4 by using the reeving machine 1;
s3, carrying out data connection on the central processing unit 2 and the reeving machine 1, and carrying out data connection on the central processing unit 2 and the wireless probe 6;
s4, driving the steel strand 4 to penetrate through the corrugated pipe 5 by using the reeving machine 1, and reading the detection data of the wireless probe 6 in real time by using the central processing unit 2;
and S5, according to the data detected by the wireless probe 6, the central processing unit 2 is used for realizing the real-time adjustment of the speed of the strand penetrating steel strand 4 of the reeving machine 1, and the corrugated pipe 5 is ensured to be complete and undamaged.
In step S5, the central processing unit 2 is further in data connection with the display 3; the display 3 is used for displaying the picture transmitted to the central processing unit 2 by the wireless probe 6 in real time, and the speed of the reeving machine 1 for reeving the steel strand 4 is adjusted through the picture displayed by the display 3; the central processing unit 2 can adopt a computer, and data transmission between the computer and the wireless probe 6 can be realized through Bluetooth so as to realize the data reception of the wireless probe 6 by the computer; the computer can also be connected with the display 3 through a data line so as to display the images acquired by the wireless probe 6 by the display 3.
In step S1, the wireless probe 6 may adopt an existing wireless camera; the wireless probe 6 at the front end of the steel strand 4 can transmit the condition in the corrugated pipe 5 to the external display 3 through the central processing unit 2, and the speed of the steel strand 4 during penetrating is regulated and controlled at any time according to the condition in the corrugated pipe 5, so that the corrugated pipe 5 is ensured to be intact, and the prestress tension is ensured to be lossless; through adopting wireless camera, the detection condition is more directly perceived, can judge the collision condition of steel strand wires 4 and bellows 5 fast, looks over simultaneously whether have the damage in the bellows 5 in real time to according to the moving speed and the collision condition of steel strand wires 4, in time adjust the speed of wearing to restraint of wearing the machine 1, furthest's reduction bellows 5 is by the possibility of steel strand wires 4 damage.
Optionally, the wireless probe 6 is detachably mounted at the front end of the steel strand 4, the wireless probe 6 is provided with the detachable protective cover 7, the wireless probe 6 and the protective cover 7 can be conveniently detached, the use at the next time is convenient, the next construction on the steel strand 4 and the corrugated pipe 5 is also convenient, and the use and assembly difficulty of the wireless probe 6 is reduced; through setting up wireless probe 6 at steel strand wires 4 front ends, can set up on the wireless probe 6 with steel strand wires 4 complex clamping piece 10, clamping piece 10 can be divided into upper half ring and lower half ring, can fix through bolt or screw connection between upper half ring and the lower half ring, and wireless probe 6 can be fixed on clamping piece 10 through adhesive bonding to realize the stable setting of wireless probe 6 on steel strand wires 4.
The protective cover 7 is a conical structural part, the conical end of the protective cover 7 faces the front end of the steel strand 4, and the wireless probe 6 is arranged corresponding to the position between the conical end of the protective cover 7 and the front end of the steel strand 4; the position that corresponds the awl end on the safety cover 7 can set up with clamping piece 10 complex adapter sleeve 11, adapter sleeve 11 corresponds the clearance setting between clamping piece 10 and the steel strand wires 4, and adapter sleeve 11 can be used for filling the space between clamping piece 10 and the steel strand wires 4, improves the frictional force of clamping piece 10 and the contact department of steel strand wires 4, is favorable to further improving the stability of wireless probe 6 on steel strand wires 4.
When the general steel strand 4 is subjected to bundle pulling operation, in order to protect the corrugated pipe 5, a bullet-shaped guide cap 9 is further required to be arranged at the front end of the steel strand 4, one end of a clamping piece 10 can be arranged corresponding to the joint of the guide cap 9 and the steel strand 4, and the other end of the clamping piece is used for installing a connecting sleeve 11 of a protective cover 7; under the clamping and fixing action of the clamping piece 10, the guide cap 9 and the protective cover 7 can be stably arranged on the steel strand 4 at the same time, and the guide cap 9 and the protective cover 7 are prevented from falling off in the process of threading the steel wire rope; and the guide cap 9 and the protective cover 7 can be made of non-metallic materials, such as rubber and other materials with high friction coefficient, so that the friction force at the joint of the clamping member 10 and the steel strand 4 can be improved, the stable matching of the clamping member 10 and the steel strand 4 can be ensured, the stable setting of the wireless probe 6 in the motion process of the steel strand 4 is realized, and the condition of the front end of the steel strand 4 can be detected by the wireless probe 6 in real time.
Optionally, the inner sides of the guide cap 9 and the connecting sleeve 11 can be provided with anti-skid protrusions matched with the surface of the steel strand 4, so that the stability of the guide cap 9 and the protective cover 7 in the process of threading the steel wire rope is further improved, and the corrugated pipe 5 is prevented from being damaged; the protective cover 7 can effectively prevent the wireless probe 6 from colliding with the corrugated pipe 5, the wireless probe 6 is well protected, the conical protective cover 7 and the guide cap 9 (or the front end of the steel strand 4) can form a funnel-shaped structure, the wireless probe 6 is arranged at a concave part in the middle of the funnel-shaped structure, and the concave part is shielded by the protective cover 7, so that the wireless probe 6 cannot collide with the inner wall of the corrugated pipe 5; when the funnel-shaped structure moves along the corrugated pipe 5 and collides with the inner wall of the corrugated pipe 5, due to the two-point limiting effect of the guide cap 9 (or the front end of the steel strand 4) and the protective cover 7, the wireless probe 6 positioned at the middle concave part of the conical structure can not be contacted with the corrugated pipe 5 all the time, the wireless probe 6 can be effectively prevented from being damaged or falling off due to collision, and the safety and the stability of the wireless probe 6 in the working process are improved.
The protective cover 7 is made of elastic rubber materials, and a shock absorption support ring 12 matched with the steel strand 4 is arranged in the protective cover 7; the shock absorption support ring 12 can play a certain supporting role on the protective cover 7, so that excessive deformation of the protective cover 7 is avoided, and the protective cover 7 can always play a role in protecting the wireless probe 6; compared with other materials, the protective cover 7 made of the elastic rubber material is not easy to damage the corrugated pipe 5 and can play a good role in protecting the wireless probe 6, and when the protective cover 7 collides with the inner wall of the corrugated pipe 5, the protective cover 7 made of the elastic rubber material can absorb collision energy again, so that the influence of collision on the normal work of the wireless probe 6 is avoided; correspondingly, the guide cap 9 can also be made of elastic rubber.
Optionally, the shock-absorbing support ring 12 can adopt foamed plastic or foam material preparation, the shock-absorbing support ring 12 can be fixed on the safety cover 7 through adhesive bonding, the impact that produces when the shock-absorbing support ring 12 can further completely cut off the collision of safety cover 7 and 5 inner walls of bellows, thereby reduce the wireless probe 6 and wear the vibration of restrainting the in-process along with steel strand wires 4, be favorable to improving the stability of the 6 pictures of wireless probe, be convenient for operating personnel through the better condition of restrainting of wearing of looking over steel strand wires 4 of display 3, operating personnel's the operation degree of difficulty has been reduced, be favorable to improving the construction effect and the efficiency of construction of restrainting of wearing of steel strand wires 4.
Optionally, the shock absorption support ring 12 may also be of an annular air bag structure, the shock absorption support ring 12 and the protective cover 7 are integrally formed, and an air nozzle for inflating and deflating air on the shock absorption support ring 12 can reduce the inner diameter of the shock absorption support ring 12 by inflating the shock absorption support ring 12, so that the inner side of the shock absorption support ring 12 is clamped and fixed with the steel strand 4, and the end of the protective cover 7 is fixed; one end of the protective cover 7 can be fixed through the clamping piece 10, and the other end of the protective cover 7 can be fixed through the damping support ring 12, so that the stability of the protective cover 7 on the steel strand 4 is further improved, and the protective cover 7 is prevented from falling off in the moving process of the steel strand 4; meanwhile, the damping support ring 12 of the air bag structure has a better damping effect, can form elastic support for the tail end of the protective cover 7, and can perform adaptive elastic deformation in the process that the protective cover 7 moves along the inner wall of the corrugated pipe 5, so that the influence of vibration on the wireless probe 6 is reduced.
The protective cover 7 is provided with an arc surface part 8 which is in sliding fit with the corrugated pipe 5; the cambered surface portion 8 can be in sliding fit with a convex ring on the inner wall of the corrugated pipe 5, so that the edge of the protective cover 7 can continuously slide over the inner wall of the corrugated pipe 5, the collision between the protective cover 7 and the inner wall of the corrugated pipe 5 is reduced, the effect of reducing the vibration of the wireless probe 6 is achieved, and the detection effect of the wireless probe 6 is further improved.
The wireless probe is arranged at the front end of the steel strand, is connected with the central processing unit and is used for monitoring the steel strand penetrating in the corrugated pipe in real time by the external display, the condition in the corrugated pipe is transmitted to the external display by the steel strand front end probe through the central processing unit, and the speed of the steel strand penetrating is regulated and controlled at any time according to the condition in the corrugated pipe, so that the integrity of the corrugated pipe is better ensured, and the construction quality of prestress tensioning is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for monitoring strand pulling construction in a prestressed structure corrugated pipe is characterized by comprising the following steps:
s1, arranging the wireless probe on the steel strand, and continuously detecting the contact position of the steel strand and the corrugated pipe in the moving process by using the wireless probe;
s2, placing the steel strand into a reeving machine, and stabilizing the steel strand by using the reeving machine;
s3, performing data connection on the central processing unit and the reeving machine, and performing data connection on the central processing unit and the wireless probe;
s4, driving the steel strand to penetrate through the corrugated pipe by using a rope penetrating machine, and reading the detection data of the wireless probe in real time by using a central processing unit;
and S5, according to the data detected by the wireless probe, the real-time adjustment of the threading speed of the steel strand of the reeving machine is realized by using the central processing unit, and the corrugated pipe is ensured to be complete and lossless.
2. The method for monitoring the strand pulling construction of the prestressed structure corrugated pipe as claimed in claim 1, wherein the method comprises the following steps: in step S1, the wireless probe is a wireless camera.
3. The method for monitoring the strand pulling construction of the prestressed structure corrugated pipe as claimed in claim 1, wherein the method comprises the following steps: in step S5, the central processing unit is further in data connection with the display; the display is used for displaying the picture transmitted to the central processing unit by the wireless probe in real time, and the speed of the reeving machine for reeving the steel strand is adjusted through the picture displayed by the display.
4. The method for monitoring the strand pulling construction of the prestressed structure corrugated pipe as claimed in claim 1, wherein the method comprises the following steps: in the step S1, the wireless probe is disposed at the front end of the steel strand, and a protective cover is disposed on the wireless probe.
5. The method for monitoring the strand pulling construction of the steel strand in the prestressed structure corrugated pipe according to claim 4, wherein the method comprises the following steps: the safety cover is the toper structure, and the awl end of safety cover sets up towards the steel strand wires front end, and wireless probe setting corresponds the position between safety cover awl end and the steel strand wires front end on the steel strand wires.
6. The method for monitoring the strand pulling construction of the steel strand in the prestressed structure corrugated pipe according to claim 4, wherein the method comprises the following steps: and a clamping piece matched with the steel strand is arranged on the wireless probe.
7. The method for monitoring the strand pulling construction of the steel strand in the prestressed structure corrugated pipe according to claim 4, wherein the method comprises the following steps: the safety cover is made of elastic rubber materials, and a damping support ring matched with the steel strand is arranged in the safety cover.
8. The method for monitoring the strand pulling construction of the steel strand in the prestressed structure corrugated pipe according to claim 4, wherein the method comprises the following steps: the protective cover is provided with an arc surface portion which can be in sliding fit with the corrugated pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060916.2A CN113605249B (en) | 2021-09-10 | 2021-09-10 | Steel strand bundle penetrating construction monitoring method in corrugated pipe with prestress structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060916.2A CN113605249B (en) | 2021-09-10 | 2021-09-10 | Steel strand bundle penetrating construction monitoring method in corrugated pipe with prestress structure |
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| CN113605249A true CN113605249A (en) | 2021-11-05 |
| CN113605249B CN113605249B (en) | 2023-06-09 |
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| CN202111060916.2A Active CN113605249B (en) | 2021-09-10 | 2021-09-10 | Steel strand bundle penetrating construction monitoring method in corrugated pipe with prestress structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08302618A (en) * | 1995-04-27 | 1996-11-19 | Kobe Steel Ltd | Strand slip prevention method and device for suspension bridge side tower saddle |
| CN103388309A (en) * | 2013-08-06 | 2013-11-13 | 天津鑫坤泰预应力专业技术有限公司 | Propelling device for finished steel strand bundle, and method for integrally propelling and passing |
| CN204924961U (en) * | 2015-07-10 | 2015-12-30 | 云南省公路科学技术研究院 | A device that is used for peeping in bridge beam slab prestressed duct detection |
| CN205296865U (en) * | 2016-01-04 | 2016-06-08 | 中铁十一局集团有限公司 | Quick detection device of prestressed duct |
| CN211547377U (en) * | 2019-11-28 | 2020-09-22 | 柳州东迎预应力技术有限公司 | Numerical control beam penetrating machine |
-
2021
- 2021-09-10 CN CN202111060916.2A patent/CN113605249B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08302618A (en) * | 1995-04-27 | 1996-11-19 | Kobe Steel Ltd | Strand slip prevention method and device for suspension bridge side tower saddle |
| CN103388309A (en) * | 2013-08-06 | 2013-11-13 | 天津鑫坤泰预应力专业技术有限公司 | Propelling device for finished steel strand bundle, and method for integrally propelling and passing |
| CN204924961U (en) * | 2015-07-10 | 2015-12-30 | 云南省公路科学技术研究院 | A device that is used for peeping in bridge beam slab prestressed duct detection |
| CN205296865U (en) * | 2016-01-04 | 2016-06-08 | 中铁十一局集团有限公司 | Quick detection device of prestressed duct |
| CN211547377U (en) * | 2019-11-28 | 2020-09-22 | 柳州东迎预应力技术有限公司 | Numerical control beam penetrating machine |
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| CN113605249B (en) | 2023-06-09 |
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