Full-time global temperature and humidity measurement intelligent cable strand of suspension bridge and manufacturing method of full-time global temperature and humidity measurement intelligent cable strand

Abstract

The invention discloses a full-time global temperature and humidity measurement intelligent cable strand of a suspension bridge and a manufacturing method thereof. The full-time global temperature and humidity measurement intelligent cable strand is mainly composed of parallel steel wire bundles and anchor cups. The parallel steel wire bundle is a hexagon formed by combining a fiber grating sensor and a zinc-aluminum rare earth alloy steel wire, and the sensor is located in the center of the parallel steel wire bundle; the parallel steel wire bundles are arranged in the anchor cup, the sensor at the casting position section is protected through a heat insulation protection material, then zinc-copper alloy is cast, and the main cable intelligent cable strand is manufactured after cooling and curing. The temperature and humidity of the steel wire in the main cable of the suspension bridge can be monitored, intelligent construction and development of the bridge industry are promoted, and good application prospects are achieved.

Description

Technical Field

[0001] The invention relates to a main cable strand for a suspension bridge, and in particular to a high-strength zinc-aluminum rare earth alloy-coated main cable smart strand for a suspension bridge that measures temperature and humidity over all time and space, and a manufacturing method thereof. Background Art

[0002] As the main load-bearing component of the suspension system, the safety of the main cable is an important guarantee for the safety of the entire bridge, and is related to the service life and operation period of the entire bridge. The main cable is generally composed of a combination of multiple main cable strands. The main cable strands are generally composed of 91-wire and 127-wire high-strength alloy-coated steel wires arranged in parallel, and the cross-sectional shape is a regular hexagon. The two ends of the main cable strands are connected to the anchors by alloy hot casting. When the main cable strands are erected, the anchors at both ends are connected to the anchoring area pull rods. After the main cable strands are erected, the main cables are protected on the outside by winding steel wires and sealants.

[0003] Since the main cable works outdoors and is exposed to wind, sun and rain for a long time, the normal working environment of the internal steel wire is particularly important to the service life of the main cable, especially the two factors of temperature and humidity. Therefore, in order to evaluate the working temperature and humidity of the internal steel wire of the main cable, a main cable strand that can detect the working environment of the internal steel wire is designed. Summary of the invention

[0004] The problem to be solved by the present invention is to realize the functions of a high-strength zinc-aluminum rare earth alloy coated main cable smart strand for a suspension bridge with full-time and full-range temperature and humidity measurement and a manufacturing method thereof, so as to realize the full-time and full-range temperature and humidity working environment monitoring of the steel wire inside the main cable of the suspension system.

[0005] A suspension bridge full-time and full-range temperature and humidity measurement smart cable strand, composed of parallel steel wire bundles and main cable strand anchor cups; the parallel steel wire bundle is composed of a temperature and humidity measurement ultra-weak fiber grating sensor and 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires arranged in parallel and pressed to form a hexagon, and wrapped with tape on the outside; the sensor is twisted from an optical cable and 6 stainless steel wires, and the diameter of the optical cable is the same as that of the stainless steel wire; the optical cable is armored with a metal mesh, and the temperature measurement weak anti-array sensor bare optical fiber and the humidity measurement weak anti-array sensor bare optical fiber are symmetrical from the inside to the outside with the sensor center, aramid, stainless steel screw The invention is composed of a rotary protective sleeve and a stainless steel wire mesh reinforcement; a grating is set every 1m on the long distance of the temperature weak anti-array sensor bare optical fiber and the humidity weak anti-array sensor bare optical fiber; the sensor is located at the center of the parallel steel wire bundle; one end of the parallel steel wire bundle is spread out by evenly splitting the wires, and is inserted into the wire splitting plate holes of the anchor cup one by one, and the plane of the wire splitting plate is perpendicular to the center axis of the anchor cup; the sensor lead-out end is 100cm away from the plane of the wire splitting plate; the casting material is cast in the anchor cup, and the excess parallel steel wire bundle is fixed and cut off; the cover plate is placed on the wire splitting plate, and a round hole is set in the middle to lead out the sensor, which is connected to the anchor cup through a thread; The diameter of the sensor is 1 times that of the alloy steel wire; The casting material is zinc-copper alloy.

[0006] A method for manufacturing a suspension bridge intelligent cable strand capable of measuring temperature and humidity over all time and in all areas; comprising the following steps: Step 1: Paying out: 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires are placed on the main cable strand pay-out drum, and a pre-prepared temperature and humidity measuring ultra-weak fiber Bragg grating sensor is placed at the rear end of the main cable strand pay-out drum area; Step 2, Bunching: The alloy steel wires are firstly divided according to the wire distribution frame required by the regular hexagonal rule, and the sensor is in the exact center position, and then concentrated in front of the hexagonal mold to form a parallel wire bundle through the mold; Step 3: pulling, wrapping, and coiling: pulling the parallel steel wire bundle containing the sensor through the shaping and adjustment equipment to apply pressure, wrap and coil; Step 4: Anchor making: Spread out one end of the parallel wire bundle evenly, and insert them into the wire splitting plate holes of the anchor cup of the main cable strand one by one. The sensor lead-out end is 100 cm away from the plane of the wire splitting plate, ensuring that the center line of the parallel wire bundle coincides with the center line of the anchor cup; Step 5, alloy hot casting: First, use the thermal insulation protection material in step 4 to prepare the thermal insulation protection for the sensor in the casting section, then heat the anchor cup 2 to 160°C, and then cast the anchor cup with the zinc-copper alloy casting material with a molten temperature of 460°C, and make the main cable smart strand after cooling and solidification.

[0007] In order to solve the above problems, the present invention adopts the following technical solution: the cable strand is composed of a parallel steel wire bundle and an anchor cup; the parallel steel wire bundle is composed of a fiber grating sensor and a high-strength galvanized aluminum rare earth alloy steel wire combined into a hexagon, and the sensor is located at the center of the parallel steel wire bundle; the parallel steel wire bundle is placed in the anchor cup, and the sensor in the casting position section is protected by a heat-insulating protective material, and then a zinc-copper alloy is cast, and after cooling and solidification, it is made into the main cable smart cable strand.

[0008] Beneficial effects: It can monitor the temperature and humidity working environment of the steel wire inside the cable strands at all times and in all areas, conduct safety monitoring of the long-term operation of the bridge, and improve the service life of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the cross-section of the smart strand of the main cable for measuring temperature and humidity.

[0010] Figure 2 Schematic diagram of the smart cable anchorage of the main cable for temperature and humidity measurement.

[0011] Figure 3 for Figure 1 Schematic diagram of the sensor structure.

[0012] In the figure: 1-parallel steel wire bundle, 2-anchor cup, 3-sensor, 3-1 optical cable, 3-2 stainless steel wire, 3-1-1-temperature weak anti-array sensor bare optical fiber, 3-1-2-aramid, 3-1-3-stainless steel spiral protective sleeve, 3-1-4-stainless steel metal mesh reinforcement, 3-1-5-humidity weak anti-array sensor bare optical fiber, 4-alloy steel wire, 5-wrapping tape, 6-wire dividing plate, 7-casting material, 8-cover plate. DETAILED DESCRIPTION

[0013] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] A suspension bridge full-time and full-range temperature and humidity measurement smart cable strand, composed of a parallel steel wire bundle 1 and a main cable strand anchor cup 2; the parallel steel wire bundle 1 is composed of a temperature and humidity measurement ultra-weak fiber grating sensor 3 and 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires 4 arranged in parallel and pressed to form a hexagon, and wrapped with a wrapping tape 5; the sensor 3 is twisted by an optical cable 3-1 and 6 stainless steel wires 3-2 made of stainless steel, and the diameter of the optical cable 3-1 is the same as that of the stainless steel wire 3-2; the optical cable 3-1 is armored with a metal mesh, and has a temperature measurement weak anti-array sensor bare optical fiber 3-1-1 and a humidity measurement weak anti-array sensor bare optical fiber 3-1-5, aramid fiber 3-1-2, stainless steel The invention is composed of a spiral protective sleeve 3-1-3 and a stainless steel wire mesh reinforcement 3-1-4; a grating is set every 1m on the long distance of the temperature weak anti-array sensor bare optical fiber 3-1-1 and the humidity weak anti-array sensor bare optical fiber 3-1-5; the sensor 3 is located at the center of the parallel steel wire bundle 1; one end of the parallel steel wire bundle 1 is spread out through uniform wire splitting, and is inserted into the holes of the wire splitting plate 6 of the anchor cup 2 one by one, and the plane of the wire splitting plate 6 is perpendicular to the central axis of the anchor cup 2; the lead-out end of the sensor 3 is 100cm away from the plane of the wire splitting plate 6; a casting material 7 is cast in the anchor cup 2 to fix and cut off the excess parallel steel wire bundle 1; a cover plate 8 is placed on the wire splitting plate 6, a round hole is set in the middle to lead out the sensor 3, and it is connected to the anchor cup 2 through a thread; The diameter of the sensor 3 is one times that of the alloy steel wire 4; The casting material 7 is a zinc-copper alloy.

[0015] A method for manufacturing a suspension bridge intelligent cable strand capable of measuring temperature and humidity over all time and in all areas; comprising the following steps: Step 1: Paying out: 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires 4 are placed on the main cable strand pay-out drum, and a pre-prepared temperature and humidity measuring ultra-weak fiber Bragg grating sensor 3 is placed at the rear end of the main cable strand pay-out drum area; Step 2, bundling: the alloy steel wires 4 are firstly divided according to the wire distribution frame required by the regular hexagonal rule, and the sensor 3 is at the exact center position, and then concentrated in front of the hexagonal mold to form a parallel steel wire bundle 1 through the mold; Step 3, pulling, wrapping, and forming a coil: pulling the parallel steel wire bundle 1 including the sensor 3 through the shaping and adjusting equipment to apply pressure, wrap and form a coil; Step 4, anchor making: spread one end of the parallel steel wire bundle 1 by evenly splitting the wires, and insert them into the holes of the wire splitting plate 6 of the anchor cup 2 of the main cable strand one by one. The lead-out end of the sensor 3 is about 100 cm away from the plane of the wire splitting plate 6, ensuring that the center line of the parallel steel wire bundle 1 coincides with the center line of the anchor cup 2; Step 5, alloy hot casting: First, use the thermal insulation protection material in step 4 to prepare the thermal insulation protection for the sensor 3 in the casting section, then heat the anchor cup 2 to about 160°C, and then cast the anchor cup 2 with the zinc-copper alloy casting material 7 with a molten temperature of about 460°C, and after cooling and solidification, make the main cable smart strand.

Claims

1. A suspension bridge full-time and full-range temperature and humidity measurement smart cable strand, comprising a parallel steel wire bundle (1) and a main cable strand anchor cup (2); characterized in that: The parallel steel wire bundle (1) is composed of a temperature and humidity measuring ultra-weak fiber Bragg grating sensor (3) and 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires (4) arranged in parallel and pressed to form a hexagon, and wrapped with a wrapping tape (5) on the outside; the sensor (3) is twisted from an optical cable (3-1) and 6 stainless steel wires (3-2) made of stainless steel, and the diameter of the optical cable (3-1) is the same as that of the stainless steel wire (3-2); the optical cable (3-1) is armored with a metal mesh, and is composed of a temperature measuring weak anti-array sensing bare optical fiber (3-1-1) and a humidity measuring weak anti-array sensing bare optical fiber (3-1-5) symmetrically from the inside to the outside with the center of the sensor (3), aramid (3-1-2), a stainless steel spiral protective sleeve (3-1-3), and a stainless steel wire metal mesh reinforcement (3-1-4); the temperature measuring weak anti-array A grating is arranged every 1 m along the length of the parallel steel wire bundle (1); the sensor (3) is located at the exact center of the parallel steel wire bundle (1); one end of the parallel steel wire bundle (1) is spread out by evenly splitting the wires and correspondingly inserted into the holes of the wire splitting plate (6) of the anchor cup (2), and the plane of the wire splitting plate (6) is perpendicular to the center axis of the anchor cup (2); the lead-out end of the sensor (3) is 100 cm away from the plane of the wire splitting plate (6); a casting material (7) is cast in the anchor cup (2) to fix and cut off the excess parallel steel wire bundle (1); a cover plate (8) is placed on the wire splitting plate (6), a circular hole is arranged in the middle to lead out the sensor (3), and the cover plate (8) is connected to the anchor cup (2) through a thread; the diameter of the sensor (3) is 1 times that of the alloy steel wire (4); the casting material (7) is a zinc-copper alloy.

2. A method for manufacturing a smart cable strand for full-time and full-range temperature and humidity measurement of a suspension bridge as claimed in claim 1; characterized in that: The following steps are also included: Step 1: Paying out the cable: 90 1960MPa high-strength galvanized aluminum rare earth alloy steel wires (4) are placed on the main cable strand pay-out drum, and a pre-prepared temperature and humidity measuring ultra-weak fiber Bragg grating sensor (3) is placed at the rear end of the main cable strand pay-out drum area; Step 2, bundling: the alloy steel wire (4) is firstly divided according to the branching frame required by the regular hexagonal rule, with the sensor (3) at the exact center, and then concentrated in front of the hexagonal mold to form a parallel steel wire bundle (1) through the mold; Step 3, pulling, wrapping, and forming a coil: pulling the parallel steel wire bundle (1) containing the sensor (3) through a shaping and adjusting device to apply pressure, wrap, and form a coil; Step 4, anchor making: spread one end of the parallel steel wire bundle (1) by evenly splitting the wires, and insert them into the holes of the wire splitting plate (6) of the anchor cup (2) of the main cable strand one by one, with the lead end of the sensor (3) 100 cm away from the plane of the wire splitting plate (6), ensuring that the center line of the parallel steel wire bundle (1) coincides with the center line of the anchor cup (2); Step 5, alloy hot casting: First, in step 4, the sensor (3) in the casting section is prepared for heat insulation protection using heat insulation protection materials, and then the anchor cup (2) is heated to 160°C, and then the zinc-copper alloy casting material (7) with a molten temperature of 460°C is cast on the anchor cup (2), and after cooling and solidification, the main cable smart strand is made.

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