CN111254874B - Anticollision buffering wharf structure - Google Patents
Anticollision buffering wharf structure Download PDFInfo
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- CN111254874B CN111254874B CN202010088284.XA CN202010088284A CN111254874B CN 111254874 B CN111254874 B CN 111254874B CN 202010088284 A CN202010088284 A CN 202010088284A CN 111254874 B CN111254874 B CN 111254874B
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 39
- 230000035939 shock Effects 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
- E02B3/068—Landing stages for vessels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
- E02B3/26—Fenders
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses an anti-collision buffer wharf structure. The anti-collision buffer wharf structure comprises a wharf body, a plurality of mooring rope devices which are arranged at the top of the wharf body, distributed along a wharf shoreline and used for mooring ropes, and an anti-collision device which is arranged on the wharf body, is positioned at one end of the wharf body facing the sea surface and is used for damping and buffering. The mooring device comprises a fixed frame arranged on the wharf body, a transmission assembly which is arranged on the fixed frame and can be adjusted, and a mooring bollard which is arranged on the transmission assembly and is provided with a mooring ring. The anti-collision device comprises a plurality of forward buffer assemblies and lateral buffer assemblies which are arranged on the wharf body and distributed along the Z direction in a staggered mode. The invention overcomes the defects of the prior art, provides the anti-collision buffer wharf structure, and solves the problems that the existing wharf is poor in anti-collision buffer performance and the mooring equipment cannot be adjusted.
Description
Technical Field
The invention relates to the technical field of wharfs, in particular to an anti-collision buffer wharf structure.
Background
With the development of trade liberalization and international transportation integration, modern information technology and network technology are accompanied with the globalization of economy and the development, and modern logistics have rapidly grown into an emerging industry which is full of vitality and has infinite potential and development space on the global scale. Modern port terminals are no longer a simple cargo exchange site, but are an important link in the international logistics chain.
The existing port wharf has the following problems: firstly, tires or other rubber products are usually arranged on a wharf to relieve the impact force when a ship stops, but the tires or other rubber products have low structural strength and poor crashworthy and buffering performance; secondly, the mooring rope equipment on the wharf needs to be wound by manpower when mooring ropes are tied, time and labor are wasted, the height of the mooring rope equipment cannot be adjusted, and accidents that the mooring ropes hang the crane ship due to large tidal fall are easy to happen.
Disclosure of Invention
The invention discloses an anti-collision buffer wharf structure, which comprises a wharf body, a plurality of mooring rope devices which are arranged at the top of the wharf body, distributed along a wharf shoreline and used for mooring ropes, and an anti-collision device which is arranged on the wharf body, positioned at one end of the wharf body facing the sea surface and used for damping and buffering, and is characterized in that:
the mooring device comprises a fixed frame arranged on the wharf body, a transmission assembly which is arranged on the fixed frame and can be adjusted, and a mooring bollard which is arranged on the transmission assembly and is provided with a mooring ring;
the anti-collision device comprises a plurality of forward buffer assemblies and lateral buffer assemblies which are arranged on the wharf body and distributed along the Z direction in a staggered mode.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that a transmission assembly comprises a fixed plate, a first motor, a main shaft, a transmission shaft, an annular rack, a second motor and a driving gear, wherein the fixed plate is installed in a fixed frame and is parallel to a horizontal plane;
the bollard is arranged at the top of the main shaft and is positioned above the fixing frame.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that a forward buffer assembly comprises a support frame of a cubic frame structure, a stand column A, a stand column B and a stand column C which are arranged at the bottom of the support frame and are distributed in the support frame along the X direction, a first anti-collision plate which is rotatably arranged at the top of the stand column A through a pin shaft, a second anti-collision plate which is rotatably arranged at the top of the stand column B through a pin shaft, a third anti-collision plate which is rotatably arranged at the top of the stand column C through a pin shaft, a support rod A with two ends respectively arranged on the first anti-collision plate and the second anti-collision plate, a support rod B with two ends respectively arranged on the second anti-collision plate and the third anti-collision plate, a first transition rod with one end hinged with the first anti-collision plate, a first buffer rod with one end hinged at the top of the stand column B and movably arranged in the first transition rod and inclined with the horizontal plane, the other end of the first spring is arranged on the first buffer rod, one end of the second transition rod is hinged with the second anti-collision plate, one end of the second buffer rod is hinged to the top of the upright C and movably arranged in the second transition rod and inclined to the horizontal plane, and the second spring is sleeved on the second transition rod, one end of the second spring is arranged on the second transition rod, and the other end of the second spring is arranged on the second buffer rod.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that the height of a stand column A is H1, the height of a stand column B is H2, the height of a stand column C is H3, and H1< H2< H3.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that a plurality of first sliding columns which are annularly arrayed around the central axis of a first transition rod are arranged on the inner cylindrical surface of the first transition rod, and a plurality of first sliding chutes which are annularly arrayed around the central axis of the first buffer rod and mutually matched with the first sliding columns are arranged on the outer cylindrical surface of the first buffer rod;
and a plurality of second sliding chutes which surround the annular array of the central axis of the second transition rod are arranged on the inner cylindrical surface of the second transition rod, and a plurality of second sliding chutes which surround the annular array of the central axis of the second buffer rod and are mutually matched with the second sliding chutes are arranged on the outer cylindrical surface of the second buffer rod.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that a lateral buffer assembly comprises a box body, a buffer plate and a plurality of auxiliary pieces, wherein the box body is installed on a wharf body, a plurality of through holes are formed in the upper end face and the lower end face of the box body, the buffer plate is rotatably installed on the box body through a pin shaft and is triangular in structure, and the auxiliary pieces are located on the two sides of the box body and distributed along the Z direction.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that an auxiliary part comprises a sliding rod, a rotating rod and a third spring, wherein one end of the sliding rod extends into a box body and is movably installed in the box body, one end of the rotating rod is hinged with the sliding rod, the other end of the rotating rod is hinged with a buffer plate and is positioned outside the box body, and one end of the third spring is installed on the sliding rod, and the other end of the third spring is installed on the box.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that the vertex angle of a buffer plate is 80 degrees.
The invention discloses a preferable anti-collision buffer wharf structure which is characterized in that a pair of slide rail groups which are symmetrical relative to a box body are arranged in the box body, and an included angle between the slide rail groups is 80 degrees;
every slide rail group includes a plurality of slide rails that distribute along the Z direction, and the slide rail both ends are installed on the box, and the slide bar is installed on the slide rail.
The invention has the following beneficial effects: the invention overcomes the defects of the prior art, provides the anti-collision buffer wharf structure, and solves the problems that the existing wharf is poor in anti-collision buffer performance and the mooring equipment cannot be adjusted.
Drawings
FIG. 1 is a side view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of the construction of the present invention;
FIG. 4 is a side view of the forward cushioning assembly of the present invention;
FIG. 5 is a front view of the forward cushioning assembly of the present invention;
FIG. 6 is a top view of the lateral cushioning assembly of the present invention;
FIG. 7 is a top cross-sectional view of the lateral cushioning assembly of the present invention;
FIG. 8 is a side view of the lateral cushioning assembly of the present invention.
The figures are labeled as follows:
100-wharf body.
200-mooring device, 201-fixing frame, 202-transmission assembly, 203-mooring ring, 204-mooring pile, 205-fixing plate, 206-first motor, 207-main shaft, 208-transmission shaft, 209-annular rack, 210-second motor, 211-inserting column and 212-driving gear.
300-an anti-collision device, 301-a forward buffer component, 302-a lateral buffer component, 303-a support frame, 304-a column A, 305-a column B, 306-a column C, 307-a first anti-collision plate, 308-a second anti-collision plate, 309-a third anti-collision plate, 310-a support rod A, 311-a support rod B, 312-a first transition rod, 313-a first buffer rod, 314-a first spring, 315-a second transition rod, 316-a second buffer rod, 317-a second spring, 318-a through hole, 319-a box body, 320-a buffer plate, 321-an auxiliary part, 322-a slide rod, 323-a rotation rod, 324-a third spring, 325-a slide rail group and 326-a slide rail.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1 and 2, a crash-proof and buffering wharf structure includes a wharf body 100, a plurality of mooring devices 200 installed on the top of the wharf body 100 and distributed along the quay line for mooring lines, and a crash-proof device 300 installed on the wharf body 100 and located at one end of the wharf body 100 facing the sea surface for shock absorption and buffering.
As shown in fig. 3, the mooring device 200 includes a fixed frame 201 mounted on the wharf body 100, a transmission assembly 202 mounted on the fixed frame 201 and adjustable, a mooring bollard 204 mounted on the transmission assembly 202 and provided with a mooring ring 203;
the transmission assembly 202 comprises a fixing plate 205 which is arranged in the fixing frame 201 and is parallel to the horizontal plane, a first motor 206 which is arranged at the bottom of the fixing frame 201, a main shaft 207 of which two ends are respectively arranged on the fixing plate 205 and the U-shaped frame through linear rotating bearings, a transmission shaft 208 of which one end is arranged on an output shaft of the first motor 206 and the other end passes through the fixing plate 205 and is movably arranged in the main shaft 207, the main shaft 207 rotates along with the transmission shaft 208, an annular rack 209 which is arranged on the main shaft 207 and is positioned in the fixing frame 201, a second motor 210 which is arranged on the fixing frame 201 and is vertical to the first motor 206, and a driving gear 212 which is arranged on an output shaft;
bollard 204 is mounted on top of mast 207 and above mount 201.
The transmission shaft 208 is provided with a plurality of inserting columns 211 annularly arrayed around the central axis of the transmission shaft 208, the inner surface of the main shaft 207 is provided with a plurality of inserting grooves annularly arrayed around the central axis of the main shaft 207 and matched with the inserting columns 211, and the inserting columns 211 are inserted into the inserting grooves.
The problems that mooring line equipment on a wharf needs to be wound manually when mooring lines are tied and the height of the mooring line equipment cannot be adjusted are solved through the mooring line device 200;
the functions of mooring and lifting are realized through the first motor 206 and the second motor 210 respectively; a second motor 210 is used for driving a driving gear 212 to rotate, the driving gear 212 is meshed with an annular rack 209, the annular rack 209 drives a main shaft 207 to move in the Z direction, and the bollard 204 moves along with the main shaft 207, so that the lifting of the bollard 204 is completed; the first motor 206 is used for driving the transmission shaft 208 to rotate, the main shaft 207 rotates along with the transmission shaft 208, and the mooring bollard 204 moves along with the main shaft 207, so that automatic mooring is completed, and time and labor are saved.
The anti-collision device 300 includes a plurality of forward cushion assemblies 301 and lateral cushion assemblies 302 mounted on the dock body 100 and distributed in a staggered manner along the Z-direction.
The problem that the existing wharf anti-collision buffer performance is poor is solved through the anti-collision device 300, the problem that impact force caused by ship berthing wharfs to the wharf cannot be buffered is effectively solved through the forward buffer assembly 301 and the lateral buffer assembly 302, and shock absorption and buffering are achieved from multiple angles and multiple directions.
As shown in fig. 4 and 5, the forward buffer assembly 301 includes a support frame 303 having a cubic frame structure, columns a304, B305, C306 installed at the bottom of the support frame 303 and located in the support frame 303 and distributed along the X direction, a first anti-collision plate 307 installed at the top of the column a304 by a pin, a second anti-collision plate 308 installed at the top of the column B305 by a pin, a third anti-collision plate 309 installed at the top of the column C306 by a pin, a support rod a310 installed at the first anti-collision plate 307 and the second anti-collision plate 308 respectively at two ends, a support rod B311 installed at the second anti-collision plate 308 and the third anti-collision plate 309 respectively at two ends, a first transition rod 312 hinged at one end to the first anti-collision plate 307, a first buffer rod 313 hinged at one end to the top of the column B305 and movably installed in the first transition rod 312 and inclined to the horizontal plane, a support rod sleeved on the first transition rod 312 and installed at one end to the first transition rod 312, A first spring 314 with the other end mounted on the first buffer rod 313, a second transition rod 315 with one end hinged with the second anti-collision plate 308, a second buffer rod 316 with one end hinged on the top of the upright C306 and movably mounted in the second transition rod 315 and inclined with the horizontal plane, and a second spring 317 sleeved on the second transition rod 315 with one end mounted on the second transition rod 315 and the other end mounted on the second buffer rod 316.
The height of the upright A304 is H1, the height of the upright B305 is H2, the height of the upright C306 is H3, H1< H2< H3.
A plurality of first sliding columns which are annularly arrayed around the central axis of the first transition rod 312 are mounted on the inner cylindrical surface of the first transition rod 312, and a plurality of first sliding grooves which are annularly arrayed around the central axis of the first buffer rod 313 and are mutually matched with the first sliding columns are arranged on the outer cylindrical surface of the first buffer rod 313; a plurality of second sliding columns which surround the annular array of the central axis of the second transition rod 315 are installed on the inner cylindrical surface of the second transition rod 315, and a plurality of second sliding grooves which surround the annular array of the central axis of the second buffer rod 316 and are mutually matched with the second sliding columns are arranged on the outer cylindrical surface of the second buffer rod 316.
The front impact is effectively weakened through the forward buffer component 301, and the impact of the ship is converted into the kinetic energy of the first anti-collision plate 307, the second anti-collision plate 308 and the third anti-collision plate 309 by utilizing the first anti-collision plate 307, the second anti-collision plate 308 and the third anti-collision plate 309 which are connected in series; the supporting rod A310 and the supporting rod B311 are used for transferring energy to form multi-layer buffer protection; the first buffer rod 313, the first transition rod 312, the second buffer rod 316, the second transition rod 315, the first spring 314 and the second spring 317 are used as transition pieces to convert the impact of the ship into kinetic energy and elastic potential energy, so that the impact energy is weakened layer by layer.
As shown in fig. 6, 7, and 8, the lateral buffer assembly 302 includes a box 319 installed on the dock body 100 and having a plurality of through holes 318 on both upper and lower end surfaces, a buffer board 320 installed on the box 319 by a pin and having a triangular structure, a plurality of auxiliary members 321 located on both sides of the box 319 and distributed along the Z direction, and an apex angle of the buffer board 320 is 80 °.
The auxiliary member 321 includes a sliding rod 322 having one end inserted into the case 319 and movably installed in the case 319, a rotating rod 323 having one end hinged to the sliding rod 322 and the other end hinged to the buffer plate 320 and located outside the case 319, and a third spring 324 having one end installed on the sliding rod 322 and the other end installed on the case 319.
A pair of slide rail sets 325 which are symmetrical about the box body 319 are arranged in the box body 319, and an included angle between the slide rail sets 325 is 80 degrees;
each slide rail set 325 comprises a plurality of slide rails 326 distributed along the Z direction, two ends of each slide rail 326 are mounted on the box 319, and the slide bars 322 are mounted on the slide rails 326.
The impact from the side is effectively weakened through the lateral buffer component 302, the buffer plate 320 is impacted to drive the rotating rod 323 to move, the rotating rod 323 drives the sliding rod 322 to move, the third spring 324 deforms to effectively convert the impact energy into kinetic energy and elastic potential energy, the triangular structure of the buffer plate 320 is utilized to simultaneously drive the auxiliary parts 321 on the two sides to move, the deformation of the spring on one side is reduced, and the original shape is quickly recovered.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (8)
1. The utility model provides a crashproof buffering wharf structure, includes wharf body (100), installs at wharf body (100) top and along a plurality of mooring line devices (200) that the wharf shoreline distributes, is used for mooring line, installs on wharf body (100) and is located wharf body (100) towards sea one end, is used for crashproof device (300) of shock attenuation buffering, its characterized in that:
the mooring device (200) comprises a fixed frame (201) arranged on the wharf body (100), a transmission assembly (202) which is arranged on the fixed frame (201) and can be adjusted, and a mooring pile (204) which is arranged on the transmission assembly (202) and is provided with a mooring ring (203);
the anti-collision device (300) comprises a plurality of forward buffer assemblies (301) and lateral buffer assemblies (302) which are arranged on the wharf body (100) and distributed in a staggered mode along the Z direction; the transmission assembly (202) comprises a fixing plate (205) which is arranged in a fixing frame (201) and is parallel to the horizontal plane, a first motor (206) which is arranged at the bottom of the fixing frame (201), a main shaft (207) of which two ends are respectively arranged on the fixing plate (205) and a U-shaped frame through linear rotating bearings, a transmission shaft (208) of which one end is arranged on an output shaft of the first motor (206) and the other end penetrates through the fixing plate (205) and is movably arranged in the main shaft (207), the main shaft (207) rotates along with the transmission shaft (208), an annular rack (209) which is arranged on the main shaft (207) and is positioned in the fixing frame (201), a second motor (210) which is arranged on the fixing frame (201) and is vertical to the first motor (206), and a driving gear (212) which is arranged on an output shaft of;
the mooring bollard (204) is arranged on the top of the main shaft (207) and is positioned above the fixed frame (201).
2. An anti-collision buffer wharf structure according to claim 1, wherein the forward buffer assembly (301) comprises a support frame (303) having a cubic frame structure, a column a (304), a column B (305), a column C (306) installed at the bottom of the support frame (303) and located in the support frame (303) and distributed along the X direction, a first anti-collision plate (307) installed at the top of the column a (304) through a pin, a second anti-collision plate (308) installed at the top of the column B (305) through a pin, a third anti-collision plate (309) installed at the top of the column C (306) through a pin, a support rod a (310) having two ends installed on the first anti-collision plate (307) and the second anti-collision plate (308), a support rod B (311) having two ends installed on the second anti-collision plate (308) and the third anti-collision plate (309), and a first transition rod (312) having one end hinged to the first anti-collision plate (307), one end is hinged at the top of the upright column B (305) and movably installed in the first transition rod (312), a first buffer rod (313) inclined to the horizontal plane, the first buffer rod is sleeved on the first transition rod (312), one end is installed on the first transition rod (312), the other end is installed on the first buffer rod (313), a second transition rod (315) with one end hinged with the second anti-collision plate (308), one end is hinged at the top of the upright column C (306) and movably installed in the second transition rod (315), a second buffer rod (316) inclined to the horizontal plane, the second buffer rod is sleeved on the second transition rod (315), one end is installed on the second transition rod (315), and the other end is installed on the second buffer rod (317).
3. An impact-absorbing wharf structure according to claim 2, wherein the height of the pillar a (304) is H1, the height of the pillar B (305) is H2, the height of the pillar C (306) is H3, and H1< H2< H3.
4. An anti-collision buffer wharf structure according to claim 2, wherein a plurality of first sliding columns are mounted on the inner cylindrical surface of the first transition rod (312) and annularly arrayed around the central axis of the first transition rod (312), and a plurality of first sliding chutes are arranged on the outer cylindrical surface of the first buffer rod (313) and annularly arrayed around the central axis of the first buffer rod (313) and matched with the first sliding columns;
a plurality of second sliding columns which surround the annular array of the central axis of the second transition rod (315) are arranged on the inner cylindrical surface of the second transition rod (315), and a plurality of second sliding grooves which surround the annular array of the central axis of the second buffer rod (316) and are matched with the second sliding columns are arranged on the outer cylindrical surface of the second buffer rod (316).
5. An anti-collision buffer wharf structure according to claim 1, wherein the lateral buffer assembly (302) comprises a box body (319) installed on the wharf body (100) and having a plurality of through holes (318) on both upper and lower end surfaces thereof, a buffer plate (320) rotatably installed on the box body (319) by a pin and having a triangular structure, and a plurality of auxiliary members (321) located on both sides of the box body (319) and distributed along the Z direction.
6. A crash-buffering wharf structure according to claim 5, wherein the auxiliary member (321) comprises a slide bar (322) having one end inserted into the box body (319) and movably installed in the box body (319), a rotating bar (323) having one end hinged to the slide bar (322) and the other end hinged to the buffer plate (320) and located outside the box body (319), and a third spring (324) having one end installed on the slide bar (322) and the other end installed on the box body (319).
7. A crash-buffering wharf structure according to claim 5 or 6, characterized in that the top angle of said buffer plate (320) is 80 °.
8. An impact-absorbing wharf structure according to claim 6, wherein a pair of slide rail sets (325) is provided in the box body (319), and the slide rail sets (325) are symmetrical with respect to the box body (319), and an included angle between the slide rail sets (325) is 80 °;
each sliding rail group (325) comprises a plurality of sliding rails (326) distributed along the Z direction, two ends of each sliding rail (326) are installed on the box body (319), and the sliding rods (322) are installed on the sliding rails (326).
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| CN202010088284.XA CN111254874B (en) | 2020-02-12 | 2020-02-12 | Anticollision buffering wharf structure |
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| CN202010088284.XA CN111254874B (en) | 2020-02-12 | 2020-02-12 | Anticollision buffering wharf structure |
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Denomination of invention: Anti collision buffer wharf structure Effective date of registration: 20211216 Granted publication date: 20210330 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: LUDONG University Registration number: Y2021980015152 |
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Date of cancellation: 20220317 Granted publication date: 20210330 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: LUDONG University Registration number: Y2021980015152 |