CN114888005A - Hydraulic system cleanliness control method - Google Patents
Hydraulic system cleanliness control method Download PDFInfo
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- CN114888005A CN114888005A CN202210451072.2A CN202210451072A CN114888005A CN 114888005 A CN114888005 A CN 114888005A CN 202210451072 A CN202210451072 A CN 202210451072A CN 114888005 A CN114888005 A CN 114888005A
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- water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0326—Using pulsations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a method for controlling the cleanliness of a hydraulic system. The hydraulic system pipeline is subjected to cleanliness control according to requirements in the links of pipe manufacturing, turnover and installation, and before the system is completely installed and used, fresh water is firstly used for washing in series to remove impurities in the system pipeline, then nitrogen is used for blowing off water and pollutants in the system pipeline, and then hydraulic oil is used for washing the system pipeline in series, so that the system pipeline reaches the cleanliness requirement. The method can effectively shorten the series washing period, reduce the series washing cost, improve the series washing quality, further shorten the mooring test period, and has important significance for ship construction. The method is suitable for being applied as a hydraulic system cleanliness control method.
Description
Technical Field
The invention relates to cleanliness control of a hydraulic system in the field of ships, in particular to a hydraulic system cleanliness control method.
Background
The traditional process for controlling the cleanliness of the hydraulic system mainly adopts a method of combining external unit serial washing with mechanical serial washing of the system, namely after the hydraulic system is installed, equipment and accessories which do not participate in serial washing are bridged, a serial washing pump station is externally connected, the hydraulic system is serially washed one by one according to serial washing units which are divided in advance, after the cleanliness of one serial washing unit meets the requirement, the next serial washing unit is switched to until the cleanliness of the whole hydraulic system is qualified through serial washing. And after the series washing is qualified, recovering the system, adding a qualified working medium into a system oil tank, performing mechanical series washing by using a system pump, simultaneously, implementing mechanical series washing by using an operating system for more than three times, and taking an oil sample to test whether the oil sample meets the cleanliness requirement or not after implementing all series washing actions of the machine, wherein if the oil sample test result is unqualified, the mechanical series washing needs to be repeatedly implemented until the oil sample test result is qualified.
The method has the advantages of high washing cost and low efficiency, and some pollutants with strong adhesive force are easy to remain at the reducing or bending part, thereby leaving hidden troubles for normal use of the system. The hydraulic system provides a clean hydraulic source for the power system and the guarantee system, so that the construction period of the hydraulic system directly determines the debugging period of the mooring test, and further influences the construction period of the whole ship.
Disclosure of Invention
The invention provides a method for controlling the cleanliness of a hydraulic system, which aims to shorten the series washing period of the hydraulic system, reduce the series washing cost and improve the series washing quality. According to the method, before the hydraulic system is completely installed and used, the system pipeline is cleaned by fresh water, water and pollutants in the system pipeline are blown off by nitrogen, and then the system pipeline is washed by hydraulic oil in series, so that the hydraulic system pipeline meets the cleanliness requirement, and the technical problem that the hydraulic system is difficult to clean is solved.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method for controlling the cleanliness of a hydraulic system includes such steps as preparing the pipes, circulating and installing the pipes in the hydraulic system, serially washing the pipes with fresh water to remove impurities, blowing off water and pollutants, and serially washing the pipes with hydraulic oil.
The method comprises the following specific steps:
(1) after the hydraulic system is installed, disconnecting equipment and accessories and effectively plugging, using a high-pressure hose or a tool pipe for bridging, and forming a loop by a pipeline subjected to serial washing after bridging without allowing dead roads and lost pipes; the hydraulic system pipeline is divided into a water serial washing unit and an oil serial washing unit through the arrangement of a system in the cabin;
(2) carrying out airtight inspection on the bridged serial washing unit, wherein the medium is clean compressed air;
(3) after the air tightness detection is finished, warm fresh water at the temperature of 60-80 ℃ is adopted, and hot water serial washing is carried out on the system pipelines one by one according to serial water units to remove solid impurities in the system;
(4) after the water serial washing is finished, nitrogen blasting and blowing are carried out on the system pipelines one by one according to the serial water units, and water storage in the system is removed;
(5) after the nitrogen blasting blowing is finished, hot oil serial washing is carried out on the system pipelines one by one according to the serial oil units;
(6) and after the hot oil serial washing is qualified, restoring the system according to a system schematic diagram, simultaneously injecting a qualified working medium into a system oil tank, replacing a filter element of a system oil return filter, putting the system into normal operation, operating the system one by one to implement mechanical serial washing, and after all the operations are finished, taking an oil sample for testing.
The positive effects are as follows: the invention can effectively shorten the series washing period, reduce the series washing cost, improve the series washing quality, further shorten the mooring test period, and has important significance for ship construction. The method is suitable for being applied as a hydraulic system cleanliness control method.
Drawings
FIG. 1 is a schematic diagram of a hot water serial washing tool;
FIG. 2 is a schematic diagram of a nitrogen explosion blowing tool.
In the figure: 1. the device comprises a stop valve, a water storage tank 2, a water stringing pump 3, a liquid pressure unit to be strung 4, a quick-opening valve 5, a nitrogen cylinder group discharging unit 6, a high-pressure hose 7, a J1 superheated steam inlet, a J2. superheated steam outlet, a J3. air vent, a J4. water discharge outlet, a J5. nitrogen discharge outlet, an A type conversion connector, a B type conversion connector and a C type conversion connector.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the figure, the cleanliness of the hydraulic system is controlled according to requirements in the links of pipe manufacturing, turnover and installation of the hydraulic system pipeline, and before the system is completely installed and used, fresh water is firstly used for washing in series to remove impurities in the system pipeline, then nitrogen is used for blowing off water and pollutants in the system pipeline, and then hydraulic oil is used for washing in series to the system pipeline, so that the system pipeline can meet the cleanliness requirement.
The port is plugged in time after the pipeline is manufactured, cleaned and cleaned, the plugging is tight, a special person is required to monitor in the transportation process, and the transportation record is made; before the pipeline is constructed in an airtight manner, a construction site needs to be cleaned, and the site is free from easily fallen objects and dust which influences cleaning; the medium for the field tightness test in the pipeline is the same as the working medium of the system, the drying is carried out after the test, the visible part is checked, if dust and dirt exist, the visible part must be cleaned in time, and the interface is sealed by plugging; when a pipeline is installed, when an equipment pipeline interface needs to be opened for plugging or a part of pipelines need to be coated with damping adhesive tapes, construction records are required, and foreign matters are strictly prohibited from remaining in the equipment and the pipelines; after construction, the open pipeline and the accessories are blocked in time; the length and the size of the groove are determined on site, and before the groove is polished, a port plug is made.
The method comprises the following specific steps:
(1) after the hydraulic system is installed, disconnecting equipment and accessories and effectively plugging, using a high-pressure hose 7 or a tooling pipe for bridging, and forming a loop for a pipeline subjected to serial washing after bridging without allowing dead roads and lost pipes; the hydraulic system pipeline is divided into a water serial washing unit and an oil serial washing unit through the arrangement of a system in the cabin; the apparatus comprises: one or more of a screw pump, an energy accumulator and a plug-in valve group; the accessory includes: one or more of an overflow valve, a pressure-bearing valve, a safety valve, a one-way valve and an electromagnetic directional valve.
(2) And carrying out airtight inspection on the bridged serial washing unit, wherein the medium is clean compressed air, and the air indexes comprise: solid particles, oil content, normal pressure dew point.
(3) After the air tightness detection is finished, warm fresh water at the temperature of 60-80 ℃ is adopted, and hot water serial washing is carried out on the system pipelines one by one according to serial water units to remove solid impurities in the system; the hot water serial washing adopts open circulation, a discharge valve is arranged at the tail end of the system, and the system is directly discharged into the sea; the water supply pressure is required to be not lower than 0.3MPa, the serial washing time is not lower than 20-30 minutes, and a water sample is washed in series to a discharge port and is clean without visible solid impurities; as shown in fig. 1, the hot water serial washing tool is an independent system, is connected with a hydraulic system through a serial washing rubber hose for serial washing, and is provided with a quick-opening valve 5 at the tail end to be communicated with the sea; the hot water series washing tool is characterized in that the superheated steam is fed and discharged through a superheated steam inlet J1 and a superheated steam outlet J2 of an auxiliary steam pipeline, clean fresh water in a water storage tank 2 provided with a vent J3 is heated, the high-temperature fresh water flows to a to-be-series washing liquid pressure unit 4 through a stop valve 1 after being pressurized by a series water pump 3, the inlet/outlet of the to-be-series washing liquid pressure unit 4 is connected with an internal system of the hot water series washing tool through a conversion joint A type and a conversion joint B type, and finally the high-temperature fresh water is discharged through a water discharge outlet J4 through a quick-opening valve 5.
(4) After the water serial washing is finished, nitrogen blasting and blowing are carried out on the system pipelines one by one according to the serial water units, and water storage in the system is removed; injecting 3MPa nitrogen into the system during nitrogen blasting blowing, opening the quick-opening valve when the pressure reaches 3MPa, closing the quick-opening valve immediately, stopping for several minutes in the middle to enable residual water drops to be concentrated, and repeating the operation until no water drops and dust are detected by white cloth at the port of the quick-opening valve to be clean; after nitrogen is blown off, a pipeline end joint can be disassembled, whether water is stored or not is checked, water can be discharged at low pressure at the downward branch pipe water storage positions on a pressure main pipe and an oil return main pipe, a system valve is closed after the water is checked to be qualified, and a small amount of nitrogen can be reserved in the system; as shown in fig. 2, the nitrogen blasting blowing-off tool consists of a nitrogen cylinder group unit 6, a high-pressure hose 7, a stop valve 1, a pressure gauge and an auxiliary pipeline, and a quick-opening valve 5 is arranged at the tail end of the nitrogen blasting blowing-off tool and is directly communicated with the sea; the frock is blown off in nitrogen gas blasting is established ties by no less than 12 nitrogen gas bottles and is integrated as nitrogen gas bottle row group unit 6, once only discharges nitrogen gas and blows to treating cluster lotion pressure unit 4 through stop valve 1, treat that cluster lotion pressure unit 4 advances/export and adopt crossover sub A type, crossover sub B type, crossover sub C type, high pressure hose 7 and nitrogen gas blasting blow off frock internal system to link to each other, finally discharge high pressure nitrogen gas through nitrogen gas discharge port J5 by quick-open valve 5.
(5) After the nitrogen blasting blowing is finished, hot oil serial washing is carried out on the system pipelines one by one according to the serial oil units; the temporary marine hose for hot oil serial washing is connected, the serial washing medium adopts a system working medium, the serial washing oil temperature is controlled to be 50-60 ℃, the serial washing pressure is controlled to be 1.25 times of rated working pressure, serial washing of two loops can be simultaneously carried out, the pulsation function is increased, thus the medium flow rate is increased, an overflow valve is installed, the control of pressure and flow is realized, and the adjustment of pressure and flow can be carried out aiming at pipelines with different drift diameters.
(6) After the hot oil serial washing is qualified, restoring the system according to a system schematic diagram, simultaneously injecting a qualified working medium into a system oil tank, replacing a filter element of a system oil return filter, replacing a 10-micron filter element of the system oil return filter with a 5-micron filter element, putting the system into normal operation, and operating the system one by one to implement mechanical serial washing for not less than three times; after all operations are finished, an oil sample is taken for assay, the oil return filter element can be replaced after the sample meets the requirements, and the system is put into normal use.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A hydraulic system cleanliness control method is characterized by comprising the following steps: the hydraulic system pipeline is subjected to cleanliness control according to requirements in each link of pipe manufacturing, transferring and installation, and before the system is completely installed and used, fresh water is firstly used for washing in series to remove impurities in the system pipeline, then nitrogen is used for blowing off water and pollutants in the system pipeline, and then hydraulic oil is used for washing the system pipeline in series, so that the system pipeline reaches the cleanliness requirement;
the method comprises the following specific steps:
1) after the hydraulic system is installed, disconnecting equipment and accessories and effectively plugging, using a high-pressure hose or a tool pipe for bridging, and forming a loop by a pipeline subjected to serial washing after bridging without allowing dead roads and lost pipes; the hydraulic system pipeline is divided into a water serial washing unit and an oil serial washing unit through the arrangement of a system in the cabin;
2) carrying out airtight inspection on the bridged serial washing unit, wherein the medium is clean compressed air;
3) after the air tightness detection is finished, warm fresh water at the temperature of 60-80 ℃ is adopted, and hot water serial washing is carried out on the system pipelines one by one according to serial water units to remove solid impurities in the system;
4) after the water serial washing is finished, nitrogen blasting and blowing are carried out on the system pipelines one by one according to the serial water units, and water storage in the system is removed;
5) after the nitrogen blasting blowing is finished, hot oil serial washing is carried out on the system pipelines one by one according to the serial oil units;
6) and after the hot oil serial washing is qualified, restoring the system according to a system schematic diagram, simultaneously injecting a qualified working medium into a system oil tank, replacing a filter element of an oil return filter of the system, putting the system into normal operation, operating the system one by one to respectively implement mechanical serial washing, and after all operations are finished, taking an oil sample for testing.
2. A hydraulic system cleanliness control method according to claim 1, characterized by:
the device in the step 1) comprises: one or more of a screw pump, an energy accumulator and a plug-in valve group; the accessory comprises: one or more of an overflow valve, a pressure-bearing valve, a safety valve, a one-way valve and an electromagnetic directional valve.
3. A hydraulic system cleanliness control method according to claim 1, characterized by:
and (3) checking the air tightness in the step 2), and checking and distinguishing pressure of the pressure oil pipeline and the oil return pipeline.
4. A hydraulic system cleanliness control method according to claim 1, characterized by:
the hot water serial washing in the step 3) adopts open cycle, a quick-opening valve (5) is arranged at the tail end of the system of the hot water serial washing tool, the hot water serial washing tool is directly discharged into the sea, and a water sample is required to be serially washed to a water discharge outlet (J4) to be clean and have no visible solid impurities; the frock is washed in hot water cluster advances to discharge superheated steam through superheated steam import (J1) and superheated steam export (J2) of supplementary steam line, heats the clean fresh water in the water storage tank (2) that is equipped with blow vent (J3), and high temperature fresh water is by the pressure boost of cluster water pump (3) after, treats cluster water pressure unit (4) through stop valve (1) flow direction, treat that cluster water pressure unit (4) advance/export adopt crossover sub A type, crossover sub B type and hot water cluster to wash frock internal system and link to each other, finally discharge high temperature fresh water through drainage export (J4) by quick-opening valve (5).
5. A hydraulic system cleanliness control method according to claim 1, characterized by:
injecting 3MPa nitrogen into the system during the nitrogen blasting blowing in the step 4), opening the quick-opening valve when the pressure reaches 3MPa and then closing the quick-opening valve, stopping for several minutes in the middle to enable residual water drops to be concentrated, and repeating the operation until no water drops and dust are detected in white cloth at the port of the quick-opening valve and the port is clean; after nitrogen is blown off, a pipeline end joint can be disassembled, whether water is stored or not is checked, water can be discharged at low pressure at the downward branch pipe water storage positions on a pressure main pipe and an oil return main pipe, a system valve is closed after the water is checked to be qualified, and a small amount of nitrogen can be reserved in the system; the nitrogen blasting blowing-off tool consists of a nitrogen cylinder row unit (6), a high-pressure hose (7), a stop valve (1), a pressure gauge and an auxiliary pipeline, and a quick-opening valve (5) is arranged at the tail end and is directly communicated with the sea; the frock is blown off in nitrogen gas blasting is established ties by no less than 12 nitrogen gas bottles and is integrated as nitrogen gas bottle row group unit (6), and disposable emission nitrogen gas blows to waiting to cluster to wash liquid pressure unit (4) through stop valve (1), it adopts crossover sub A type, crossover sub B type, crossover sub C type, high pressure hose (7) and nitrogen gas blasting to blow off frock internal system and link to each other to wait to cluster to wash liquid pressure unit (4) business turn over/export, finally by quick-open valve (5) with high-pressure nitrogen gas through nitrogen gas discharge port (J5) discharge.
6. A hydraulic system cleanliness control method according to claim 1, characterized by:
the hot oil serial washing in the step (5) is connected with the temporary marine hose, the serial washing medium adopts a system working medium, the serial washing oil temperature is controlled to be 50-60 ℃, and the serial washing pressure is controlled to be 1.5 times of the rated working pressure.
7. A hydraulic system cleanliness control method according to claim 1, characterized by:
and (4) replacing the oil return filter element after the sample meets the requirement in the step (6), and putting the system into normal use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451072.2A CN114888005B (en) | 2022-04-27 | 2022-04-27 | Hydraulic system cleanliness control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210451072.2A CN114888005B (en) | 2022-04-27 | 2022-04-27 | Hydraulic system cleanliness control method |
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| CN114888005A true CN114888005A (en) | 2022-08-12 |
| CN114888005B CN114888005B (en) | 2023-10-13 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009026039A1 (en) * | 2009-06-25 | 2010-12-30 | Thomas Pfalz | System for cleaning and disinfection of e.g. pipes, has flushing pipe including liquid connector, where flushing pipe and compressed air connector are arranged in pipe attachment that is connected with pipe by adapter |
| CN107587151A (en) * | 2017-08-28 | 2018-01-16 | 南通振华重型装备制造有限公司 | A kind of novel hydraulic pipe high-efficiency washing method |
| CN108015064A (en) * | 2017-12-29 | 2018-05-11 | 沪东重机有限公司 | A kind of marine low speed diesel engine pipeline pre-flush equipment |
| CN111136069A (en) * | 2019-12-30 | 2020-05-12 | 南通振华重型装备制造有限公司 | Novel small-diameter hydraulic pipeline cleaning method |
| US20200325052A1 (en) * | 2019-04-15 | 2020-10-15 | Michael Scott Waleski | Marine water treatment system built into dock box for high-pressure boat wash and onboard water supply |
| CN112427419A (en) * | 2020-11-18 | 2021-03-02 | 大连辽南船厂 | Process for cleaning and mixing oil in oil pipeline of ship industrial power system |
| CN213194900U (en) * | 2020-06-22 | 2021-05-14 | 渤海造船厂集团有限公司 | Stainless steel pipeline serial washing device for preventing microbial corrosion |
-
2022
- 2022-04-27 CN CN202210451072.2A patent/CN114888005B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009026039A1 (en) * | 2009-06-25 | 2010-12-30 | Thomas Pfalz | System for cleaning and disinfection of e.g. pipes, has flushing pipe including liquid connector, where flushing pipe and compressed air connector are arranged in pipe attachment that is connected with pipe by adapter |
| CN107587151A (en) * | 2017-08-28 | 2018-01-16 | 南通振华重型装备制造有限公司 | A kind of novel hydraulic pipe high-efficiency washing method |
| CN108015064A (en) * | 2017-12-29 | 2018-05-11 | 沪东重机有限公司 | A kind of marine low speed diesel engine pipeline pre-flush equipment |
| US20200325052A1 (en) * | 2019-04-15 | 2020-10-15 | Michael Scott Waleski | Marine water treatment system built into dock box for high-pressure boat wash and onboard water supply |
| CN111136069A (en) * | 2019-12-30 | 2020-05-12 | 南通振华重型装备制造有限公司 | Novel small-diameter hydraulic pipeline cleaning method |
| CN213194900U (en) * | 2020-06-22 | 2021-05-14 | 渤海造船厂集团有限公司 | Stainless steel pipeline serial washing device for preventing microbial corrosion |
| CN112427419A (en) * | 2020-11-18 | 2021-03-02 | 大连辽南船厂 | Process for cleaning and mixing oil in oil pipeline of ship industrial power system |
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| CN114888005B (en) | 2023-10-13 |
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