CN111721639B - Submarine cable water permeability test system and method for deep sea - Google Patents
Submarine cable water permeability test system and method for deep sea Download PDFInfo
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- CN111721639B CN111721639B CN202010738424.3A CN202010738424A CN111721639B CN 111721639 B CN111721639 B CN 111721639B CN 202010738424 A CN202010738424 A CN 202010738424A CN 111721639 B CN111721639 B CN 111721639B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention provides a submarine cable water penetration test system for deep sea, which comprises a sample installation assembly, a pressure-resistant assembly, a brine circulation system, a hydraulic system and an electric control system, wherein the sample installation assembly is combined with the pressure-resistant assembly, a sample is installed in the pressure-resistant assembly through the sample installation assembly, the brine circulation system is combined with the pressure-resistant assembly, the hydraulic system is combined with the brine circulation system, and the electric control system is electrically connected with the pressure-resistant assembly, the brine circulation system and the hydraulic system. The invention also provides a water permeability test method for the submarine cable for the deep sea, which is used for automatically proportioning brine, automatically controlling the pressure environment, and conveniently and efficiently completing the water permeability test. The deep-sea submarine cable water permeability test system can meet the test requirements of deep-sea submarine cables within 4000 meters, and the deep-sea submarine cable water permeability test method is efficient, convenient and fast and has good detection accuracy.
Description
Technical Field
The invention relates to the technical field related to submarine cable water permeability tests, in particular to a submarine cable water permeability test system and method for deep sea.
Background
Along with the continuous increase of the development force of ocean resources, the development of the ocean resources gradually goes to deep open sea, and the demand for deep sea cables is also increased. The deep sea cable is one of the submarine cables with the highest requirements on cable performance, and is required to be capable of meeting the requirements of high-strength pulling and wear resistance in the laying process and also capable of resisting the submarine high-pressure and high-corrosion environment. Accordingly, the importance of the deep-sea cable inspection is also becoming increasingly prominent, and one of the most important items in the deep-sea cable inspection is the water penetration test. The water permeability test is to provide a specified seawater pressure test environment for the conductor under the condition that the cable fails in the deepest water depth area of the simulated cable, so that the longitudinal water blocking performance of the conductor is detected. Currently, in the relevant standard 'CIGRE TB 490:2012Recommendations for Testing of Long AC Submarine Cables with Extruded Insulation for System' of submarine cables, a water blocking tape is arranged in a conductor during production of the submarine cable, and the water blocking effect of the submarine cable in tap water and salt water is different. For example, the water blocking tape with the model ZDSD of 3.0mm has a water blocking capacity of 14mm/5min for tap water and 3mm/5min for sea water, i.e. the sea water blocking capacity is only about one fifth of the tap water blocking capacity. In the water permeability test, the pretreatment of the cable sample is required to be as close as possible to the actual installation condition, and the water used in the test is tap water or salt water, namely, the sea cable with the water blocking belt arranged in the conductor is required to use salt water to be closer to the sea water condition when the longitudinal water permeability test of the conductor is carried out. In the GB/T32346.1-2015 rated voltage 220kV (um=252 kV) crosslinked polyethylene insulated large-length alternating-current submarine cable and accessories, unless the specific requirements of users are met, tap water or brine corresponding to sea salinity of sea areas of sea cable application are adopted for water permeability test water. The use of brine in the water-blocking test is not mandatory in the two standards, but the water-blocking performance is only 1/5 of that of tap water in terms of the current water-blocking performance. Still, the test using tap water is not satisfactory. The submarine cable water penetration test system in the prior art is designed for a 1000-meter water depth test, and can not meet the test requirements of 4000-meter deep submarine cables. Still according to the standard GB/T32346.1, tap water is required to be used as a test medium, and the seawater resistance of the submarine cable cannot be truly reflected. The existing submarine cable water permeability test system is mainly made of carbon steel and 306L stainless steel, and cannot solve the problem that CL-in seawater corrodes the system, so that potential safety hazards exist. The marine cable water permeability test system in the prior art does not recycle test water and can cause pollution to the environment.
Disclosure of Invention
Accordingly, the main object of the present invention is to provide a submarine cable water penetration test system for deep sea, which comprises a sample installation component, a pressure-resistant component, a brine circulation system, a hydraulic system and an electric control system, wherein the sample installation component is combined with the pressure-resistant component, a sample is installed in the pressure-resistant component through the sample installation component, the brine circulation system is combined with the pressure-resistant component, the hydraulic system is combined with the brine circulation system, and the electric control system is electrically connected with the pressure-resistant component, the brine circulation system and the hydraulic system.
The invention further aims to provide a water permeability test method for the submarine cable for the deep sea, which is capable of automatically proportioning saline water, automatically controlling the pressure environment, and conveniently and efficiently completing the water permeability test.
In order to achieve the above purpose, the invention provides a submarine cable water-blocking performance test system for detecting submarine cable samples, which comprises a sample mounting assembly, a pressure-resistant assembly, a brine circulating system, a hydraulic system and an electric control system, wherein the sample mounting assembly is combined with the pressure-resistant assembly, the submarine cable samples are mounted on the sample mounting assembly, the submarine cable samples are conveyed by the sample mounting assembly and are mounted in the pressure-resistant assembly, the brine circulating system is combined with the pressure-resistant assembly, the hydraulic system is combined with the brine circulating system, and the electric control system is electrically connected with the pressure-resistant assembly, the brine circulating system and the hydraulic system.
Preferably, the pressure-resistant assembly comprises a pressure-resistant cabin, a pressure gauge, a pressure sensor and a manual exhaust valve, the brine circulation system comprises a brine tank, a water inlet pipe, an exhaust recovery pipe, an in-cabin recovery pipe, a pressure relief recovery pipe and a drainage pump, the top of the brine tank is connected with the pressure-resistant cabin through the exhaust recovery pipe, and the manual exhaust valve, the pressure gauge and the pressure sensor are arranged on the exhaust recovery pipe along a direction away from the brine tank; the bottom side part of the brine tank is connected with the pressure-resistant cabin through the water inlet pipe, the middle part of the water inlet pipe is divided into two pipelines which are connected in parallel, a water inlet pump and a high-pressure pump are respectively arranged on the two pipelines, and a one-way valve is arranged on the pipeline on which the high-pressure pump is arranged; the in-cabin recovery pipe is communicated with the exhaust recovery pipe and the pressure-resistant cabin, and a drainage pump is arranged on the in-cabin recovery pipe; the pressure relief recovery pipe is communicated with the water inlet pipe and the exhaust recovery pipe.
Preferably, a filter is installed at the top end inside the brine tank, a stirrer is installed on the filter in a combined mode, and a brine concentration sensor is installed in the brine tank.
Preferably, a second solenoid valve is installed on the exhaust gas recovery pipe adjacent to the brine tank, and the second solenoid valve is connected to the drain through a pipe.
Preferably, a first electromagnetic valve is arranged on the water inlet pipe adjacent to the brine tank, and the first electromagnetic valve is connected with a tap water inlet pipe.
Preferably, the hydraulic system comprises an oil pump motor, a first stop valve, a second stop valve and a third stop valve, wherein the oil pump motor is respectively communicated with the first stop valve, the second stop valve and the third stop valve through pipelines; the first stop valve is arranged on a pipeline provided with the water inlet pump, the second stop valve is arranged on the cabin recovery pipe, and the third stop valve is arranged on the pressure relief recovery pipe.
Preferably, the sample mounting assembly comprises a main support, a winch, a first winch and a second winch, the pressure-resistant assembly comprises a pressure-resistant cabin, the main support is arranged in parallel with the pressure-resistant cabin, the winch is arranged between the main support and the pressure-resistant cabin, the winch is positioned at one end of the main support, the first winch is arranged at one end of the pressure-resistant cabin away from the winch, and the second winch is arranged at one end of the main support away from the winch; the first winch passes through the pressure cabin through a traction rope and bypasses one end of the submarine cable sample, and the second winch is connected with the other end of the submarine cable sample through the traction rope.
Preferably, the sample mounting assembly comprises an auxiliary support coaxially arranged with the pressure compartment between the winch and the pressure compartment.
Preferably, components in the submarine cable water permeability test system for the deep sea are made of duplex stainless steel materials.
The invention provides a water permeability test method of a submarine cable for deep sea, which adopts the water permeability test system of the submarine cable for deep sea and comprises the following steps:
(A) Opening an end cover of the pressure-resistant cabin, arranging the submarine cable sample in the sample mounting assembly, loading the submarine cable sample into the pressure-resistant cabin through the sample mounting assembly, loading the end cover and locking, and opening the manual exhaust valve;
(B) Setting the brine concentration required by the test through the electric control system, and regulating the brine concentration in the brine tank by the brine tank;
(C) After the proportioning of the brine in the brine tank is completed, the water inlet pump works, and the brine is injected into the pressure-resistant cabin through the water inlet pipe;
(D) After the pressure-resistant cabin is filled with salt water, entering an exhaust stage, and closing the manual exhaust valve after the exhaust is completed;
(E) Setting a pressurizing parameter through the electric control system, switching to an automatic control mode, pressurizing the pressure-resistant cabin through the high-pressure pump, and controlling the pressure of the system through the hydraulic system, wherein the submarine cable water permeability test system for the deep sea achieves the set pressurizing parameter;
(F) Entering a pressure maintaining stage according to a set requirement, automatically supplementing pressure from the pressure drop to the pressure supplementing pressure difference, and recording pressure data in real time;
(G) After the dwell time is up, the hydraulic system controls the in-cabin recovery pipe to be conducted, and the brine in the pressure-resistant cabin is recovered into the brine tank through the drainage pump;
(H) After the test is finished, opening the pressure-resistant cabin after the pressure is unloaded to 0, opening the manual exhaust valve, starting the drainage pump, draining water to the salt water tank, completely draining water in the pressure-resistant cabin, removing an end cover of the pressure-resistant cabin, and removing the submarine cable sample from the pressure-resistant cabin through the sample mounting assembly.
Compared with the prior art, the submarine cable water permeability test system and method for the deep sea have the advantages that: the submarine cable water penetration test system for the deep sea can meet the test requirement of the submarine cable within 4000 meters, and can more accurately test the seawater resistance of the submarine cable; the submarine cable water permeability test system for the deep sea can automatically detect the concentration of saline water, automatically adjust the proportion saline water according to a set saline water concentration value, and adjust the saline water more accurately; the brine circulation system can recycle the medium water for the test, so that the environmental pollution caused by the test is reduced; the salt water tank is provided with a stirring and filtering structure, so that the problems of impurities and salt crystallization in the test can be effectively solved; the submarine cable water permeability test system for the deep sea is convenient to operate and high in automation degree; the submarine cable water permeability test method for the deep sea is efficient and convenient, and has good detection accuracy.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a submarine cable water permeability test system for deep sea according to the present invention.
Fig. 2 is a schematic diagram of a submarine cable water penetration test system for deep sea according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention discloses a submarine cable water penetration test system for deep sea, which comprises a sample mounting assembly 10, a pressure-resistant assembly 20, a brine circulation system 30, a hydraulic system 40 and an electric control system 50. The sample mounting assembly 10 is mounted in combination with the pressure resistant assembly 20, the submarine cable sample 1 is mounted on the sample mounting assembly 10, and is transported by the sample mounting assembly 10 and loaded into the pressure resistant assembly 20. The brine circulation system 30 is combined with the pressure-resistant assembly 20, the hydraulic system 40 is combined with the brine circulation system 30, and the electric control system 50 is electrically connected with the pressure-resistant assembly 20, the brine circulation system 30 and the hydraulic system 40. Wherein the submarine cable sample 1 has a length of not more than 40 meters.
Specifically, the sample mounting assembly 10 includes a main support 11, a winch 12, an auxiliary support 14, a first winch 131 and a second winch 132, the pressure resistant assembly 20 includes a pressure resistant compartment 21, the main support 11 is disposed in parallel with the pressure resistant compartment 21, the winch 12 is disposed between the main support 11 and the pressure resistant compartment 21, and the winch 12 is located at one end of the main support 11, the first winch 131 is disposed at one end of the pressure resistant compartment 21 away from the winch 12, the second winch 132 is disposed at one end of the main support 11 away from the winch 12, and the auxiliary support 14 is disposed coaxially with the pressure resistant compartment 21 between the winch 12 and the pressure resistant compartment 21. The submarine cable sample 1 is initially placed on the main support rack 11. The first hoist 131 passes through the pressure-resistant chamber 21 through the pulling rope 1311 and bypasses the winch 12 to connect the front end of the submarine cable sample 1, and the second hoist 132 passes through the pulling rope 1321 to connect the rear end of the submarine cable sample 1. After the end covers of the pressure-resistant cabin 21 are opened, the first winch 131 and the second winch 132 are started, the submarine cable sample 1 is driven to be loaded into the pressure-resistant cabin 21, the end covers of the pressure-resistant cabin 21 are loaded, and the submarine cable sample 1 can be sealed in the pressure-resistant cabin 21 by locking the end covers with bolts.
As shown in fig. 2, pressure resistant assembly 20 further includes a pressure gauge 22, a pressure sensor 23, and a manual purge valve 24. The brine circulation system 30 includes a brine tank 31, a stirrer 32 and a filter 33 installed in the brine tank 31, a water inlet pipe 34, an exhaust gas recovery pipe 35, an in-cabin recovery pipe 36, a pressure relief recovery pipe 37, and a drain pump 38. A filter 33 is installed at the top end of the inside of the brine tank 31, a stirrer 32 is installed in combination with the filter 33, and a brine concentration sensor is also installed in the brine tank 31. The top of the brine tank 31 is connected with the pressure-resistant cabin 21 through an exhaust recovery pipe 35, and the manual exhaust valve 24, the pressure gauge 22 and the pressure sensor 23 are arranged on the exhaust recovery pipe 35 along the direction of the brine tank 31 to the pressure-resistant cabin 21. A second electromagnetic valve 351 is installed on the exhaust gas recovery pipe 35 adjacent to the brine tank 31, and the second electromagnetic valve 351 is connected to the drain through a pipe. The bottom side of the brine tank 31 is connected with the pressure-resistant cabin 21 through a water inlet pipe 34, the middle part of the water inlet pipe 34 is divided into two pipelines which are connected in parallel, a water inlet pump 342 and a high-pressure pump 343 are respectively arranged on the two pipelines, and a one-way valve 344 is arranged on the pipeline on which the high-pressure pump 343 is arranged. The water inlet pipe 34 is provided with a first electromagnetic valve 341 adjacent to the brine tank 31, and the first electromagnetic valve 341 is connected with a tap water inlet pipe. The in-cabin recovery pipe 36 communicates the exhaust recovery pipe 35 with the pressure-resistant cabin 21, and a drain pump 38 is installed on the in-cabin recovery pipe 26. The pressure relief recovery pipe 37 communicates with the water inlet pipe 34 and the exhaust recovery pipe 35.
The hydraulic system 40 includes an oil pump motor 51, a first cut-off valve 52, a second cut-off valve 53, and a third cut-off valve 54, and the oil pump motor 51 is respectively communicated with the first cut-off valve 52, the second cut-off valve 53, and the third cut-off valve 54 through pipes. The first shut-off valve 52 is mounted on a pipe to which the intake pump 342 is mounted, the second shut-off valve 53 is mounted on the in-cabin recovery pipe 36, and the third shut-off valve 54 is mounted on the pressure relief recovery pipe 37. The oil pump motor 51 controls the on/off of the first stop valve 52, the second stop valve 53 and the third stop valve 54, and further controls the on/off of the pipeline of the brine circulation system 30.
The submarine cable water penetration test system for the deep sea can meet the test requirement of the submarine cable within 4000 meters, and can more accurately test the seawater resistance of the submarine cable; the submarine cable water permeability test system for the deep sea can automatically detect the concentration of saline water, automatically adjust the proportion saline water according to a set saline water concentration value, and adjust the saline water more accurately; the brine circulation system can recycle the medium water for the test, so that the environmental pollution caused by the test is reduced; the salt water tank is provided with a stirring and filtering structure, so that the problems of impurities and salt crystallization in the test can be effectively solved; the components in the submarine cable water permeability test system for the deep sea are made of duplex stainless steel materials, so that the problem of CL corrosion of salt water to the system can be effectively solved.
The invention also provides a water permeability test method of the submarine cable for the deep sea, which comprises the following steps:
(A) Opening an end cover of the pressure-resistant cabin 21, arranging the submarine cable sample 1 in the sample mounting assembly 10, loading the submarine cable sample 1 into the pressure-resistant cabin 21 through the sample mounting assembly 10, loading the end cover and locking, and opening the manual exhaust valve 24;
(B) The brine concentration required by the test is set by the electric control system 50, and the brine tank 31 adjusts the brine concentration therein;
(C) After the proportioning of the brine in the brine tank 31 is completed, the water inlet pump 342 works, and the brine is injected into the pressure-resistant cabin 21 through the water inlet pipe 34;
(D) After the pressure-resistant cabin 21 is filled with salt water, the pressure-resistant cabin enters an exhaust stage, and the manual exhaust valve 24 is closed after the exhaust is completed;
(E) Setting a pressurizing parameter through an electric control system 50, switching to an automatic control mode, pressurizing the pressure-resistant cabin 21 through a high-pressure pump 343, and controlling the system pressure through a hydraulic system 40, wherein the submarine cable water permeability test system for the deep sea achieves the set pressurizing parameter;
(F) Entering a pressure maintaining stage according to a set requirement, automatically supplementing pressure from the pressure drop to the pressure supplementing pressure difference, and recording pressure data in real time;
(G) After the dwell time is up, the hydraulic system 40 controls the in-cabin recovery pipe 36 to be conducted, and the brine in the pressure-resistant cabin 21 is recovered into the brine tank 31 through the drainage pump 38;
(H) After the test is finished, the pressure-resistant cabin 21 is opened after the pressure is relieved to 0, the manual exhaust valve 24 is opened, the drainage pump 53 is started, the water in the pressure-resistant cabin 21 is drained completely, the end cover of the pressure-resistant cabin 21 is removed, and the submarine cable sample 1 is removed from the pressure-resistant cabin 21 through the sample mounting assembly 10.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The submarine cable water-blocking test system for detecting the water blocking performance of a submarine cable sample is characterized by comprising a sample mounting assembly, a pressure-resistant assembly, a brine circulation system, a hydraulic system and an electric control pressure-resistant system, wherein the sample mounting assembly is combined with the pressure-resistant assembly, the submarine cable sample is mounted on the sample mounting assembly, the submarine cable sample is conveyed into the pressure-resistant assembly by the sample mounting assembly, the brine circulation system is combined with the pressure-resistant assembly, the hydraulic system is combined with the brine circulation system, and the electric control system is electrically connected with the pressure-resistant assembly, the brine circulation system and the hydraulic system;
the pressure resistant assembly comprises a pressure resistant cabin; the brine circulation system comprises a brine tank, a cabin recovery pipe and a pressure relief recovery pipe; the top of the brine tank is connected with the pressure-resistant cabin through an exhaust recovery pipe, and the bottom side of the brine tank is connected with the pressure-resistant cabin through a water inlet pipe; the in-cabin recovery pipe is communicated with the exhaust recovery pipe and the pressure-resistant cabin; the pressure relief recovery pipe is communicated with the water inlet pipe and the exhaust recovery pipe.
2. The marine submarine cable water penetration test system according to claim 1, wherein the pressure-resistant assembly comprises a pressure gauge, a pressure sensor, and a manual vent valve, and the brine circulation system comprises and a drain pump; the manual exhaust valve, the pressure gauge and the pressure sensor are arranged on the exhaust recovery pipe along the direction away from the brine tank; the water inlet pipe is divided into two pipelines which are connected in parallel, a water inlet pump and a high-pressure pump are respectively arranged on the two pipelines, and a one-way valve is arranged on the pipeline on which the high-pressure pump is arranged; and a drainage pump is arranged on the recovery pipe in the cabin.
3. The submarine cable water penetration test system according to claim 2, wherein a filter is installed at the top end of the inside of the brine tank, a stirrer is installed on the filter in a combined manner, and a brine concentration sensor is installed in the brine tank.
4. The marine submarine cable water penetration test system according to claim 2, wherein a second solenoid valve is installed on the vent recovery pipe adjacent to the brine tank, and wherein the second solenoid valve is connected to the drain through a pipe.
5. The submarine cable water penetration test system according to claim 2, wherein a first solenoid valve is installed on the water inlet pipe adjacent to the brine tank, and the first solenoid valve is connected to a tap water inlet pipe.
6. The submarine cable water penetration test system for the deep sea according to claim 3, wherein the hydraulic system comprises an oil pump motor, a first stop valve, a second stop valve and a third stop valve, and the oil pump motor is respectively communicated with the first stop valve, the second stop valve and the third stop valve through pipelines; the first stop valve is arranged on a pipeline provided with the water inlet pump, the second stop valve is arranged on the cabin recovery pipe, and the third stop valve is arranged on the pressure relief recovery pipe.
7. The marine submarine cable water penetration test system according to claim 1, wherein the sample mounting assembly comprises a main support, a winch, a first winch and a second winch, the pressure-resistant assembly comprises a pressure-resistant cabin, the main support is arranged in parallel with the pressure-resistant cabin, the winch is arranged between the main support and the pressure-resistant cabin, the winch is positioned at one end of the main support, the first winch is arranged at one end of the pressure-resistant cabin away from the winch, and the second winch is arranged at one end of the main support away from the winch; the first winch passes through the pressure cabin through a traction rope and bypasses one end of the submarine cable sample, and the second winch is connected with the other end of the submarine cable sample through the traction rope.
8. The marine cable water penetration test system of claim 7 wherein the sample mounting assembly includes an auxiliary support frame coaxially disposed with the pressure pod between the winch and the pressure pod.
9. The marine submarine cable water penetration test system according to claim 1, wherein components in the marine submarine cable water penetration test system are made of duplex stainless steel materials.
10. A method for testing the permeability of a submarine cable for deep sea, characterized in that the system for testing the permeability of the submarine cable for deep sea according to claim 3 is used, comprising the following steps:
(A) Opening an end cover of the pressure-resistant cabin, arranging the submarine cable sample in the sample mounting assembly, loading the submarine cable sample into the pressure-resistant cabin through the sample mounting assembly, loading the end cover and locking, and opening the manual exhaust valve;
(B) Setting the brine concentration required by the test through the electric control system, and regulating the brine concentration in the brine tank by the brine tank;
(C) After the proportioning of the brine in the brine tank is completed, the water inlet pump works, and the brine is injected into the pressure-resistant cabin through the water inlet pipe;
(D) After the pressure-resistant cabin is filled with salt water, entering an exhaust stage, and closing the manual exhaust valve after the exhaust is completed;
(E) Setting a pressurizing parameter through the electric control system, switching to an automatic control mode, pressurizing the pressure-resistant cabin through the high-pressure pump, and controlling the pressure of the system through the hydraulic system, wherein the submarine cable water permeability test system for the deep sea achieves the set pressurizing parameter;
(F) Entering a pressure maintaining stage according to a set requirement, automatically supplementing pressure from the pressure drop to the pressure supplementing pressure difference, and recording pressure data in real time;
(G) After the dwell time is up, the hydraulic system controls the in-cabin recovery pipe to be conducted, and the brine in the pressure-resistant cabin is recovered into the brine tank through the drainage pump;
(H) After the test is finished, opening the pressure-resistant cabin after the pressure is unloaded to 0, opening the manual exhaust valve, starting the drainage pump, draining water to the salt water tank, completely draining water in the pressure-resistant cabin, removing an end cover of the pressure-resistant cabin, and removing the submarine cable sample from the pressure-resistant cabin through the sample mounting assembly.
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Address after: 226000 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Applicant after: Zhongtian Technology submarine cable Co.,Ltd. Address before: 226000 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Applicant before: ZHONGTIAN TECHNOLOGIES SUBMARINE CABLE Co.,Ltd. |
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