1. The power cable calandria settlement monitoring system is characterized by comprising a plurality of optical fiber settlement boxes (20) and data processing equipment (40), wherein the optical fiber settlement boxes (20) are arranged at the bottom of a power calandria (10) at intervals, each optical fiber settlement box (20) comprises a water tank (21), a floating block (22) movably arranged in the water tank (21), a U-shaped floating plate (23) movably arranged at the top of the water tank (21) and a stress membrane (25) fixedly arranged at the bottom of the water tank (21), the bottom of the U-shaped floating plate (23) is fixedly connected with the floating block (22), and the top of the U-shaped floating plate is abutted to the bottom of the power calandria (10); and the bottom connecting rod (24) of the floating block (22) is connected with the top of the stress membrane (25), the bottom of the stress membrane (25) is connected with a data processing device (40) through an optical fiber (26), and at least one fiber bragg grating stress sensor (28) is arranged on the optical fiber (26).

2. A power cable duct bank settling monitoring system according to claim 1, wherein the optical fiber settling box (20) is disposed at a side of a support seat (30) supporting the power duct bank (10) and arranged in a one-to-one correspondence with the support seat (30).

3. A power cable duct bank settlement monitoring system as claimed in claim 1, wherein the float block (22) is connected to the bottom of the U-shaped float plate (23) by a number of limit pins passing through the top of the water tank (21).

4. A power cable duct bank settlement monitoring system according to claim 1, wherein a protective housing (27) is provided at the bottom of the water tank (21), the fiber grating stress sensor (28) being located within the protective housing (27).

5. A power cable duct bank settlement monitoring system according to claim 4, wherein the optical fiber (26) is fixedly arranged at the bottom of the protective casing (27) by a fixing member.

6. A power cable duct bank settlement monitoring system according to claim 1, wherein the bottom of the water tank (21) is connected with a water inlet and outlet pipe (29), the water inlet and outlet pipe (29) comprises a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are both provided with electromagnetic valves.

7. A power cable duct bank settlement monitoring system according to claim 1, wherein the top of the water tank (21) is provided with an exhaust duct, the exhaust duct being arranged in a transverse direction.

8. A power cable duct bank settlement monitoring system according to claim 1, wherein the data processing device (40) is a computer or a cloud server.

9. A power cable duct bank settlement monitoring system according to claim 1, wherein the data processing device (40) is wirelessly connected to a smart terminal (50).

Background

The power channel is used as an important component of an urban underground space, a high-voltage cable line of 10kV or more is laid, an important power transmission task is generally carried out in an urban network, generally, during installation and construction, the geology is not flat or the strength is unstable, the settlement of a power grid pipe can happen, the excessive settlement is too large, and the potential safety hazard exists for the installation of the power grid pipe. On one hand, the settlement of 2cm is an alarm value, which is difficult to find; on the other hand, the occurrence of the settlement needs to be observed and checked manually at any time, which wastes manpower and material resources. Therefore, there is a need for a system that can remotely monitor the amount of micro-settling in a power line pipe.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a power cable duct bank settlement monitoring system.

One technical scheme for achieving the above purpose is as follows: the invention provides a power cable calandria settlement monitoring system, which comprises a plurality of optical fiber settlement boxes and data processing equipment, wherein the optical fiber settlement boxes are arranged at the bottom of a power calandria at intervals, each optical fiber settlement box comprises a water tank, a floating block movably arranged in the water tank, a U-shaped floating plate movably arranged at the top of the water tank and a stress diaphragm fixedly arranged at the bottom of the water tank, the bottom of the U-shaped floating plate is fixedly connected with the floating block, and the top of the U-shaped floating plate is abutted against the bottom of the power calandria; and the bottom connecting rod of the floating block is connected with the top of the stress membrane, the bottom of the stress membrane is connected with data processing equipment through optical fibers, and at least one fiber bragg grating stress sensor is arranged on the optical fibers.

Further, on the power cable duct bank settlement monitoring system, the optical fiber settlement box is arranged at a position on one side of the support seat supporting the power cable duct bank and is arranged in one-to-one correspondence with the support seat.

Furthermore, on the power cable duct bank settlement monitoring system, the floating block is connected with the bottom of the U-shaped floating plate through a plurality of limiting bolts penetrating through the top of the water tank.

Further, on the power cable calandria settlement monitoring system, a protective shell is arranged at the bottom of the water tank, and the fiber bragg grating stress sensor is located in the protective shell.

Further preferably, on the power cable duct bank settlement monitoring system, the optical fiber is fixedly arranged at the bottom of the protective shell through a fixing piece.

Further, power cable calandria settlement monitoring system on, the bottom of water tank is connected with business turn over water pipe, business turn over water pipe includes inlet tube and drain pipe, all installed the solenoid valve on inlet tube and the drain pipe.

Further, on the power cable calandria settlement monitoring system, an exhaust pipeline is arranged at the top of the water tank and is transversely arranged.

Further, on the power cable duct bank settlement monitoring system, the data processing device is a computer or a cloud server.

Furthermore, on the power cable duct bank settlement monitoring system, the data processing device is connected with the intelligent terminal in a wireless mode.

According to the power cable duct bank settlement monitoring system, the stress on the stress membrane is partially offset by utilizing the buoyancy of the floating block and the U-shaped floating plate, so that high-precision settlement measurement can be kept in a high-pressure-difference water level; the optical transmission of the optical fiber is adopted, so that the settlement can be monitored in real time by the remote power calandria, and the manual inspection cost is greatly reduced; meanwhile, when the settlement is remotely measured, a power supply is not required to be additionally provided for the settlement gauge; in addition, the wavelength division multiplexing function is realized by utilizing the wavelength distinguishing characteristic of the fiber bragg grating temperature sensor, the center wavelengths of the fiber bragg gratings used by a plurality of sensing probes are different, and the fiber bragg gratings are connected in series on the same optical fiber to realize the wavelength division multiplexing; the settlement monitoring system can continuously and distributively monitor the settlement of the power line bank pipe, ensures the settlement data analysis and statistics of the power line bank pipe, and has the advantages of simple installation, accurate measurement and high automation degree.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a power cable duct bank settlement monitoring system according to the present invention;

FIG. 2 is a schematic structural diagram of an optical fiber settlement box in the power cable duct bank settlement monitoring system according to the present invention;

wherein the reference symbols are:

10-electric power calandria; 20-an optical fiber settling box, 21-a water tank, 22-a floating block, 23-a U-shaped floating plate, 24-a connecting rod, 25-a stress membrane, 26-an optical fiber, 27-a protective shell, 28-an optical fiber grating stress sensor and 29-a water inlet and outlet pipe; 30-a support seat; 40-a data processing device; 50-intelligent terminal.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:

as shown in fig. 1 and fig. 2, the present embodiment provides a power cable duct bank settlement monitoring system, which includes a plurality of optical fiber settlement boxes 20 and a data processing device 40, where the optical fiber settlement boxes 20 include a water tank 21, a floating block 22 movably disposed in the water tank 21, a U-shaped floating plate 23 movably disposed on the top of the water tank 21, and a stress membrane 25 fixedly disposed on the bottom of the water tank 21, the bottom of the U-shaped floating plate 23 is fixedly connected to the floating block 22, and the top of the U-shaped floating plate is abutted to the bottom of the power cable duct bank 10; the bottom connecting rod of the floating block 22 is connected with the top of the stress diaphragm 25, the bottom of the stress diaphragm 25 is connected with the data processing device 40 through the optical fiber 26, the optical fiber 26 is provided with at least one fiber bragg grating stress sensor 28, and the optical transmission of the optical fiber 26 is adopted, so that the settlement can be monitored in real time through a remote power pipe, and the manual inspection cost is greatly reduced; wavelength division multiplexing is realized by using the wavelength distinguishing characteristic of the fiber grating temperature sensor 28, and the fiber gratings used by a plurality of sensing probes are connected in series on the same optical fiber to realize wavelength division multiplexing, wherein the central wavelengths of the fiber gratings are different.

In this embodiment, as shown in fig. 1, the optical fiber settling boxes 20 are disposed at a side of the supporting seat 30 supporting the power drain pipe 10, and are disposed in a one-to-one correspondence with the supporting seat 30.

In this embodiment, as shown in fig. 2, the floating block 22 is connected to the bottom of the U-shaped floating plate 23 by a plurality of limit bolts passing through the top of the water tank 21.

In the present embodiment, as shown in fig. 2, a protective shell 27 is disposed at the bottom of the water tank 21, and the fiber grating stress sensor 28 is located in the protective shell 27. The optical fiber 26 is fixedly arranged at the bottom of the protective shell 27 through a fixing member, and the shape of the fixing member is not limited as long as the fixing member can play a role in supporting and fixing the fiber bragg grating stress sensor 28.

In this embodiment, as shown in fig. 2, the bottom of the water tank 21 is connected with a water inlet and outlet pipe 29, the water inlet and outlet pipe 29 includes a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are both provided with electromagnetic valves. The top of the water tank 21 is provided with an exhaust duct which is arranged transversely.

In this embodiment, as shown in fig. 2, the data processing device 40 is a computer or a cloud server. The data processing device 40 is connected with the intelligent terminal 50 through wireless. The intelligent terminal 50 is a mobile phone or a tablet personal computer, so that the requirement that people observe the settlement condition anytime and anywhere is met, and preferably, the intelligent terminal 50 is connected with the data processing equipment 40 through the internet with a larger service range.

The power cable duct bank settlement monitoring system has the main technical scheme that the stress applied to the stress membrane is partially offset by utilizing the buoyancy of the floating block and the U-shaped floating plate, so that the high-precision settlement measurement can be kept in a high-pressure-difference water level; meanwhile, when the settlement is remotely measured, a power supply is not required to be additionally provided for the settlement gauge; the settlement monitoring system can continuously and distributively monitor the settlement of the power line bank pipe, ensures the settlement data analysis and statistics of the power line bank pipe, and has the advantages of simple installation, accurate measurement and high automation degree.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.