CN114278651A - Intelligent circulating flushing hydraulic system and control method - Google Patents
Intelligent circulating flushing hydraulic system and control method Download PDFInfo
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- CN114278651A CN114278651A CN202111583583.1A CN202111583583A CN114278651A CN 114278651 A CN114278651 A CN 114278651A CN 202111583583 A CN202111583583 A CN 202111583583A CN 114278651 A CN114278651 A CN 114278651A
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Abstract
An intelligent circulating flushing hydraulic system and a control method thereof comprise: the oil separator comprises a filtering unit, an oil separator unit and an oil supply unit; the valve group unit is provided with a bidirectional regulating valve group, so that flushing oil output from the oil supply unit can flow into the oil separator unit in the forward direction or the reverse direction to circularly flush each oil distribution pipeline, and impurities in each oil distribution pipeline are flushed and flow into the filtering unit to be deposited; the filter unit is provided with two groups of filter assemblies which are communicated with each other, so that the filter element containing impurities can be replaced and a new filter element can be installed when the flushing oil in the oil separator unit flows back to the oil supply unit through the filter assemblies. The invention can quickly and accurately switch oil ways and sequentially and efficiently flush the multi-component oil pipelines; meanwhile, in the cleaning process, the filter element deposited with the particle impurities can be replaced, so that the particle impurities in the oil way can be continuously collected; the control method has the advantages of thorough washing, repeated recycling, high automation degree, no wiring time of the discharge pipes and high washing efficiency.
Description
Technical Field
The invention belongs to the technical field of flushing of hydraulic systems, and particularly relates to an intelligent circulating flushing hydraulic system and a control method.
Background
In the metallurgical industry, large-scale mechanical equipment basically operates by a hydraulic cylinder and a hydraulic motor of a hydraulic system. In a servo hydraulic system with more precise action, the hydraulic valve group is more precisely machined, and the cleanliness of hydraulic oil is required to be higher. In order to ensure the cleanliness of the hydraulic oil, the hydraulic oil needs to be circularly washed after the pipeline welding acceptance is qualified, and impurities such as particles, welding slag and the like remained in the pipeline are removed. To meet the cleanliness requirement of the oil liquid of the servo hydraulic system, a long time is usually needed, and the manpower and material resource investment is large.
Disclosure of Invention
The invention provides an intelligent circulating flushing hydraulic system and a control method, which are particularly suitable for flushing an oil way of high-tonnage hydraulic equipment, and how to automatically, quickly and high-quality complete the flushing work of a hydraulic pipeline under the condition that a flushing hydraulic system does not stop.
In order to solve at least one technical problem, the technical scheme adopted by the invention is as follows:
an intelligent cyclic flushing hydraulic system comprising:
a valve group unit for controlling the circulation of the flushing oil circuit;
the filtering unit is used for filtering impurities in the oil liquid;
the oil separator unit is used for being communicated with each oil separating pipeline in the hydraulic equipment;
and an oil supply unit for supplying a flushing oil;
the valve group unit is provided with a bidirectional regulating valve group, so that flushing oil output from the oil supply unit can flow into the oil separator unit in the forward direction or the reverse direction to circularly flush each oil distribution pipeline, and impurities in each oil distribution pipeline are flushed and flow into the filtering unit to be deposited;
the filter unit is provided with two groups of filter assemblies which are communicated with each other, and the filter unit can replace a filter element containing impurities and install a new filter element when the flushing oil in the oil separator unit flows back to the oil supply unit through the filter assemblies.
Furthermore, the valve group unit comprises two sets of valve groups, each valve group comprises two valves, and the two valves in each valve group are respectively arranged on oil paths at two ports of the oil distributor unit, so that the oil paths in the oil distributor unit can form two mutually communicated loops in opposite directions.
Furthermore, two valves in the two sets of valve banks are arranged in a staggered mode to form two reverse loops.
Further, the oil separator unit includes:
the oil separator I/oil separator II is provided with a plurality of flexible inlet pipes;
the oil separator II/the oil separator I is provided with a flexible outlet pipe;
the main flushing pipe is directly connected with the valve group unit and the filtering unit, and the auxiliary flushing pipes are connected with oil distributing pipelines in hydraulic equipment;
one end of the main flushing pipe is communicated with the input end/output end of the oil separator I/the oil separator II;
the flexible inlet pipes and the flexible outlet pipes correspond to each other one by one and are communicated and connected with each oil distribution pipeline in the hydraulic equipment through the auxiliary flushing pipes respectively.
Furthermore, valves are arranged on the interfaces of the flexible inlet pipe and the flexible outlet pipe which are communicated with an oil distribution pipeline in the hydraulic equipment.
Furthermore, the filter assembly comprises two filter cartridges, two communicating pipes are arranged between the two filter cartridges, and a 90-degree bidirectional switching valve for controlling the direction of an oil path is also arranged between the two communicating pipes;
one of the communicating pipes is communicated with the output end of the oil separator unit;
the other communicating pipe is communicated with a return end of the oil supply unit.
Furthermore, each filter cylinder is provided with a filter element; and pressure sensors are arranged at the input end and the output end of the filtering unit.
Further, the oil supply unit comprises an oil tank, a motor and a hydraulic pump, wherein the motor is connected with the hydraulic pump; the hydraulic pump is communicated with the oil separator unit; the oil tank is communicated with the filtering unit.
A method of controlling an intelligent recirculating flushing hydraulic system including a flushing hydraulic system as claimed in any one of the preceding claims, the steps comprising:
s3, sequentially communicating the output end of the oil supply unit, the valve group unit, the oil separator unit, the filter unit and the input end of the oil supply unit to form a flushable circulation closed loop;
s4, checking the air tightness of the whole circulation loop;
s5, adding flushing oil of the same specification and model as the working oil used in the hydraulic equipment into the oil supply unit;
s6, starting the oil supply unit, adjusting the valve group unit to enable all flushing oil to fill all pipelines in the oil distributor unit through oil pipes, enabling the flushing oil to flow through one filter cartridge in the filter unit for filtering and depositing, and enabling the filtered flushing oil to finally flow back to the oil supply unit through the oil pipes;
s7, the valve banks in the valve bank unit are switched regularly to flush oil distribution pipelines in hydraulic equipment in a bidirectional circulation mode;
s8, testing the pressure between the oil inlet and the oil outlet of the filtering unit, calculating the pressure difference, and judging whether the pressure difference is within the range of 0.2-0.4MPa of the standard pressure difference; if yes, continuing to use the current filter cylinder; if not, adjusting the oil path, stopping using the current filter cylinder and switching to another filter cylinder to continue filtering;
and S9, repeating the steps S7-S8 until the washing is clean.
Further, before the S3, the method further includes:
s1, purging a main flushing pipe directly connected with the valve group unit and the filtering unit and auxiliary flushing pipes connected with oil distributing pipelines in hydraulic equipment in the oil distributor unit by clean and dry compressed air to ensure that all the main flushing pipes and the auxiliary flushing pipes are unblocked;
s2, communicating the valve group unit and the filtering unit with the oil distributor unit through the main flushing pipe respectively; then all oil distributing pipelines in the hydraulic equipment are communicated through the auxiliary flushing pipe; the oil separator unit is communicated with oil separating pipelines in hydraulic equipment.
By adopting the intelligent circulating flushing hydraulic system and the control method, the valve bank unit and the filtering unit which are in bidirectional circulation and intelligent switching are arranged, so that oil ways can be switched quickly and accurately, and multi-component oil pipelines can be flushed sequentially to keep efficient circulating flushing; simultaneously, in the cleaning process, the filter element deposited with particle impurities can be replaced, so that the particle impurities in the oil way can be continuously collected. The control method has thorough flushing, can be recycled for many times, does not need to be watched and operated by personnel, saves the wiring time of a pipe arrangement, and has high flushing efficiency.
Drawings
FIG. 1 is a schematic diagram of an intelligent circulating flushing hydraulic system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an intelligent recirculating flushing hydraulic system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a valve block unit according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an oil separator unit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a filter unit according to an embodiment of the present invention.
In the figure:
10. oil supply unit 11, oil tank 12 and motor
13. Hydraulic pump 20, valve group unit 21, valve group I
211. Valve I212, valve II 22 and valve group II
221. Valve III 222, valve III 23 and oil pipe I
24. Oil pipe two 25, oil pipe three 26 and oil pipe four
30. Oil separator unit 31, main flushing pipe 32, and auxiliary flushing pipe
33. Oil separator one 34, oil separator two 35, advance flexible pipe
36. Flexible outlet pipe 37, four valves 38 and oil distributing pipeline
40. Filter unit 41, filter cartridge one 42 and filter cartridge two
43. First communicating pipe 44, second communicating pipe 45 and fifth oil pipe
46. 90-degree bidirectional switching valve 47 and pressure sensor
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The present embodiment provides an intelligent circulating flushing hydraulic system, as shown in fig. 1-2, including: an oil supply unit 10 for supplying flushing oil, a valve block unit 20 for controlling circulation of a flushing oil path, an oil separator unit 30 for communicating with each oil distribution pipeline 38 in the hydraulic equipment, and a filtering unit 40 for filtering impurities in the oil; the oil supply unit 10 is communicated with the oil separator unit 30 through the first oil pipe 23, the oil separator unit 30 is communicated with the filter unit 40 through the second oil pipe 24, and the filter unit 40 is communicated with the oil supply unit 10 through the fifth oil pipe 47. The oil supply unit 10, the oil separator unit 30, and the filter unit 40 form a circulation loop. The valve group unit 20 is provided with a two-way regulating valve group, flushing oil output from the oil supply unit 10 can flow into the oil separator unit 30 in the forward direction or the reverse direction on the oil pipe one 23 and the oil pipe two 24 to circularly flush each oil distribution pipeline 38, and impurities in each oil distribution pipeline 38 are flushed and flow into the filtering unit 40 to be deposited; and the filtering unit 40 is provided with two sets of filtering assemblies communicating with each other, which are capable of replacing the filter cartridge containing impurities and installing a new filter cartridge when the flushing oil in the oil separator unit 30 is returned to the oil supply unit 10 through the filtering assemblies.
Specifically, the oil supply unit 10 includes an oil tank 11, a motor 12, and a hydraulic pump 13, an input port of the hydraulic pump 13 is communicated with the oil tank 11, and an output port thereof is communicated with the valve block unit 20 through a pipe; the motor 12 is directly electrically connected with the hydraulic pump 13; the motor 12 controls the hydraulic pump 13 so as to output the flushing oil in the oil tank 11 to the outside; wherein the type of flushing oil in the tank 11 must be identical to the type used in the hydraulic equipment.
The valve group unit 20 includes two valve groups, each valve group includes two valves, and the two valves in each valve group are respectively disposed on the oil paths of the two ports of the oil separator unit 20, so that the oil paths in the oil separator unit 20 can form two loops which are opposite in direction and are mutually communicated.
As shown in fig. 3, the valve block unit 20 includes a first valve block 21 and a second valve block 22, where the first valve block 21 includes a first valve 211 and a second valve block 212, where the first valve block 211 is disposed on the first oil pipe 23, and the second valve block 212 is disposed on the second oil pipe 24. Two straight-through pipes are further arranged between the first oil pipe 23 and the second oil pipe 24, namely an oil pipe three 25 and an oil pipe four 26, and the oil pipe three 25 is arranged between the first valve 211 and the second valve 212; the fourth oil pipe 26 is provided at one end thereof on the first oil pipe 23 between the first valve 211 and the main flushing pipe 31 connected to the first oil separator 33 in the oil separator unit 30, and at the other end thereof on the second oil pipe 24 between the second valve 212 and the filter unit 40. The second valve set 22 comprises a third valve 221 and a fourth valve 222, wherein the third valve 221 is arranged on the third oil pipe 25, and the fourth valve 222 is arranged on the fourth oil pipe 26. The first valve 211, the second valve 212, the third valve 221 and the fourth valve 222 are disposed alternately to form two reverse loops.
As shown in fig. 1, when the valve set two 22 is closed and the valve set one 21 is opened, the flushing oil enters the oil separator one 33 through the oil pipe one 23, then enters the oil separating pipeline 38 through the flexible inlet pipe 35 arranged on the oil separator one 33, the impurities in the oil separating pipeline 38 are carried away by the flushing oil, enter the oil separator two 34 through the flexible outlet pipe 36, then flow into the filtering unit 40 through the oil pipe two 24, and are deposited, so that a clockwise circulating flushing oil path is formed.
As shown in fig. 2, when the valve group one 21 is closed and the valve group two 22 is opened, the flushing oil sequentially enters the oil separator two 34 through the oil pipe one 23 and the oil pipe three 25, and then enters the oil distribution pipeline 38 through the flexible outlet pipe 36 arranged on the oil separator two 34, impurities in the oil distribution pipeline 38 are taken away by the flushing oil, enter the oil separator one 33 through the flexible inlet pipe 35, and then sequentially flow into the filtering unit 40 through the oil pipe one 23, the oil pipe four 26 and the oil pipe two 24 for deposition, so that a counterclockwise circulating flushing oil path is formed.
In the washing process, a certain time can be set for alternately controlling the first valve group 21 and the second valve group 22 so as to realize the circulation function of a two-way oil circuit, and particle impurities in each oil distribution pipeline 38 can be washed repeatedly in two ways so as to quickly and effectively wash the particle impurities in each oil distribution pipeline 38, and finally flow to the filtering unit 40 for deposition, so that the washing can be more thorough, the cleanliness quality of the washing oil can be improved, and the washing time is shortened.
As shown in fig. 4, the oil separator unit 30 includes an oil separator one 33 provided with a plurality of inlet flexible pipes 35 and an oil separator two 34 provided with a plurality of outlet flexible pipes 36; or comprises a second oil separator 34 provided with a plurality of inlet flexible pipes 35 and a first oil separator 33 provided with a plurality of outlet flexible pipes 36; and a main flushing pipe 31 for direct connection with the valve block unit 20 and the filter unit 40 and an auxiliary flushing pipe 32 for connection with the respective oil distribution pipes 38 in the hydraulic equipment. One end of the main flushing pipe 31 is communicated with the input end/output end of the oil separator I33/oil separator II 34; the flexible inlet pipes 35 and the flexible outlet pipes 36 correspond to each other and are respectively connected with oil distribution pipelines 38 in the hydraulic equipment (omitted from the drawing) through the auxiliary flushing pipes 32 in a communicating manner. During the flushing process, the inlet and outlet pipes on the oil distribution pipes 38 in the hydraulic equipment need to be removed, and are respectively connected to the first oil distributor 33 and the second oil distributor 34 through the auxiliary flushing pipe 32, the inlet flexible pipe 35 and the outlet flexible pipe 36. Because the switching of the single valve group 20 can form a bidirectional circulating oil path, the positions of the first oil separator 33, the second oil separator 34, the flexible inlet pipe 35 and the flexible outlet pipe 36 can be interchanged, and the ports of the first oil pipe 23 and the second oil pipe 24 connected with the first oil separator 33 and the second oil separator 34 can be automatically switched as an input end and an output end, so that the work of the oil separator unit 30 is not influenced.
In order to further improve the flow direction of the single oil separator 30, when the number of the oil distribution pipelines 38 is different from that of each flexible pipe, the unused flexible pipes need to be closed, so that a valve four 37 needs to be arranged at the interface of each inlet flexible pipe 35 and each outlet flexible pipe 36 communicated with the oil distribution pipelines 38; by controlling each flexible inlet pipe 35 and the valve four 37 at the end of the corresponding flexible pipe 36 to be opened and closed, the one-way circulating flushing of the oil distributing pipeline 38 can be realized.
And moreover, the four valves 37 are arranged at the interfaces of each inlet flexible pipe 35 and each outlet flexible pipe 36 communicated with the oil distribution pipeline 38, and the four valves are controlled to be opened and closed to enable each oil distribution pipeline 38 to be washed independently, so that the pressure and the flow rate of the washing oil are high, the pipelines have certain impact effect, impurities on the inner wall of the oil distribution pipeline 38 are easy to fall off, and the impurities flow to the high-precision filtering unit 40 on the oil pipe two 24 along with the washing oil.
The oil separator unit 30 can replace each valve stand in the hydraulic equipment, and according to inlet and outlet joints of different types of each valve stand in the hydraulic equipment, inlet flexible pipes 35 and outlet flexible pipes 36 with different specifications, four valves 37 and joints are installed, so that the parts can be recycled in different engineering projects.
As shown in fig. 5, the filter assembly in the filter unit 40 includes two filter cartridges, i.e., a first filter cartridge 41 and a second filter cartridge 42, a first communication pipe 43 and a second communication pipe 44 are disposed between the first filter cartridge 41 and the second filter cartridge 42, and a 90 ° bidirectional switching valve 46 is further disposed between the first communication pipe 43 and the second communication pipe 44 to control the inlet and outlet of the first filter cartridge 41 and the second filter cartridge 42. The oil pipe II 24 serving as an output pipe of the oil separator unit 30 is communicated with the filter assembly through a first communicating pipe 43; the communication pipe 44 is communicated with the oil tank 11 through an oil pipe five 45 as a return pipe of the oil supply unit 10. The filter component adopts a double-cylinder filtering mode, one filter cylinder works, the other filter cylinder is used as a standby filter cylinder, and the valve is switched to shift the position so as to realize the purpose of switching the filter element for filtering without stopping, improve the filtering efficiency and save the filtering time.
A 90-degree two-way switching valve 46 is arranged on the communicating pipe 45, pressure sensors 47 are respectively arranged at the input end and the output end of the filtering unit 40, namely, a digital display type pressure sensor 47 is respectively arranged at one end of the oil pipe two 24 close to the filtering component and one end of the oil pipe five 45 close to the filtering component, the pressure sensors 47 are used for monitoring the pressure between the oil inlet and the oil outlet of the filtering unit 40, and the pressure difference is calculated by an external controller (omitted in the drawing) so as to judge whether the pressure difference between the oil inlet and the oil outlet of the filtering unit 40 is within the range of standard pressure difference 0.2-0.4 MPa; if the pressure is in the range of 0.2-0.4MPa, the current filter cylinder is continuously used; if the pressure is more than 0.4MPa or less than 0.2MPa, the direction is switched by automatically controlling the 90-degree bidirectional switching valve 46, the oil path in the filter assembly is automatically adjusted, the current filter cartridge is stopped from being used, and the filter cartridge is switched to another filter cartridge for continuous filtration. And an external alarm device (the drawing is omitted) is also arranged, and the pressure sensor 47 is connected with the external alarm device.
When the filter cartridge II 42 is closed by the 90-degree two-way switching valve 46, the flushing oil with impurities enters the first communicating pipe 43 through the oil pipe II 24 and then enters the first filter cartridge 41 for filtering and precipitating, and the flushing oil filtered by the filter element in the first filter cartridge 41 then sequentially flows back to the oil tank 11 through the second communicating pipe 44 and the oil pipe five 45; in the circulating continuous filtering process, the pressure sensor 47 continuously monitors the pressure on the oil pipe two 24 and the oil pipe five 45, if the pressure difference is within the range of standard pressure difference 0.2-0.4MPa, the alarm device does not give an alarm, and the 90-degree two-way switching valve 46 does not need to be regulated and controlled, so that the air pressure and the filtering of the filter cartridge one 41 are normal.
When the pressure difference monitored by the pressure sensor 47 is not within the range of 0.2-0.4MPa of the standard pressure difference, namely the measured pressure difference is greater than 0.4MPa or less than 0.2MPa, the alarm device gives an alarm, the manual operation is carried out to change the direction of the 90-degree bidirectional switching valve 46, at the moment, the filter cartridge I41 stops working, the flushing oil with impurities enters the first intercommunication pipe 43 through the oil pipe II 24 and then enters the second filter cartridge 42 to be filtered and precipitated, and the flushing oil filtered by the filter element in the second filter cartridge 42 then sequentially flows back to the oil tank 11 through the second intercommunication pipe 44 and the fifth oil pipe 45. The pressure in the second 24 and fifth 45 lines continues to be monitored by the pressure sensor 47 and the entire flushing hydraulic system is not shut down, at which point the first 41 filter cartridge is manually opened and the filter cartridge with deposited particulate impurities is removed and a new filter cartridge is reinstalled in the first 41 filter cartridge in preparation for the next filtration.
Accordingly, when the pressure differential in cartridge two 42 is alarmed, the above operations are repeated, continuing to replace the filter element in cartridge two 42 without stopping flushing the hydraulic system.
Through the control of the first valve group 21 and the second valve group 22, a two-way switching circulating flushing oil path can be formed in the oil distributor unit 30, the flushing direction of the oil path is switched after flushing for a fixed time, and then the oil path is flushed in a reverse circulating manner, so that particle impurities in each oil distribution pipeline 38 are flushed; and filtering and depositing through the filtering unit 40 of the double-drum filter element with intelligent monitoring and alarming, and rapidly switching the filtering assembly so as to ensure that the flushing oil with impurities flows back to the oil tank 11 while the filtering assembly continues to work, and the filter element which is filtered and used can be replaced, thereby forming a closed flushing loop with bidirectional circulation and bidirectional control.
The intelligent efficient circulating flushing hydraulic system in the embodiment can quickly and high-quality complete the flushing work of each oil distribution pipeline 38 in the hydraulic equipment, and meanwhile saves construction materials, people and labor. Wherein, the filter unit 40 in the system is equipped with filter core and changes intelligent alarm device, can implement the operating condition who monitors straining a section of thick bamboo being filterable, in case the pressure differential of this section of thick bamboo appears unusually, can pass through the pressure sensor 47 monitoring vertical frame of electron digital display to remind through intelligent alarm device, with the standby section of thick bamboo that strains is switched to fast, realize that the circulation is washed and is not shut down and still can accomplish the quick replacement work of filter core, improved the flushing efficiency who washes hydraulic system, and saved the flushing time. The oil separator unit 30 is controlled by the valve group unit 20, and can alternately and circularly wash clockwise and anticlockwise, so that all particle impurities gathered in the oil separating pipeline 38 can be thoroughly washed quickly and efficiently and are all collected in the filtering component, and the technical problem that the particle impurities accumulated at the valve after unidirectional circular washing cannot be timely discharged out, so that the particle impurities are left or not thoroughly washed is solved. Furthermore, the structure of the adjustable oil separator unit 30 is suitable for valve stands of various hydraulic equipment of different models or specifications, so that the problems of few oil supply ports and many oil return ports for flushing the flushing pipe in the oil separating pipeline 38 are solved, and a closed flushing loop can be formed completely synchronously or asynchronously.
The method for flushing the hydraulic system by intelligent circulation control can not only ensure the flushing quality, shorten the time for connecting each flushing pipeline, improve the working efficiency, but also finish the construction task in advance; meanwhile, the devices in all the units can be repeatedly utilized, a large amount of construction materials are saved, the economic benefit is remarkable, the intelligent alarm device additionally arranged on the filtering unit 40 can reduce the guard time of operators, and the technical problem that the flushing is forced to be temporarily interrupted or the flushing and filtering are not clean due to the fact that the filter element is inconvenient to detach and judged to be good or bad by experience in the existing flushing hydraulic system is solved.
A method of controlling an intelligent recirculating flushing hydraulic system, including a flushing hydraulic system as described above, the steps comprising:
s1, firstly, blowing clean and dry compressed air to the main flushing pipe 31 directly connected with the valve group unit 20 and the filtering unit 40 in the oil distributor unit 30 and the auxiliary flushing pipe 32 connected with each oil distributing pipeline 38 in the hydraulic equipment, so as to ensure that all the main flushing pipe 31 and the auxiliary flushing pipe 32 are smooth, and accelerate the later circulating flushing speed.
S2, respectively communicating the valve group unit 20 and the filtering unit 40 with the oil distributor unit 30 through the main flushing pipe 31, namely connecting the main flushing pipe 31 with the first oil pipe 23 and the second oil pipe 24 respectively, and respectively communicating the main flushing pipe 31 with the first oil distributor 33 and the second oil distributor 34; the branch oil pipes 38 in the hydraulic equipment are communicated through the auxiliary flushing pipe 32.
S3, sequentially communicating the output end of the oil supply unit 10, the valve group unit 20, the oil separator unit 30, the filter unit 40 and the input end of the oil supply unit 10 to form a flushable circulation closed loop; that is, the hydraulic pump 13 is communicated with the oil tank 11, the output end of the hydraulic pump 13 is connected with the first oil pipe 23, and the first oil pipe 23, the main flushing pipe 31, the first oil separator 33, the flexible inlet pipe 35, the oil separating pipeline 38, the flexible outlet pipe 36, the second oil separator 34, the main flushing pipe 31, the second oil pipe 24, the first communication pipe 43, the first filter cartridge 41, the second communication pipe 44, the fifth oil pipe 45 and the oil tank 11 are communicated in sequence to form a circularly closed flushing oil path.
S4, checking the air tightness of the whole circulation loop, closing the output port of the hydraulic pump 13 and the oil inlet of the oil tank 11, and then utilizing compressed air to test pressure and detect leakage, so as to ensure that the whole connected circulation flushing liquid oil path has no leakage point.
S5, flushing oil with the same specification and model as the working oil used in the hydraulic equipment is added into the oil tank 11 in the oil supply unit 10, so that oil products with different specifications are prevented from remaining in the oil distribution pipeline 38 and other flushing pipelines and damaging the working oil.
And S6, starting the oil supply unit, and adjusting a valve group switch in the valve group unit 20 to enable the flushing oil to be completely filled in each pipeline in the oil distributor unit 30 through the first oil pipe 23, then to flow through one of the filter cartridges in the filtering unit 40 for filtering and depositing, and finally to flow back to the oil tank 11 in the oil supply unit 10 through the fifth oil pipe 45.
And S7, switching the first valve group 21 and the second valve group 22 in the valve group unit 20 in a timing mode to flush each oil distribution pipeline 38 in the hydraulic equipment in a two-way circulation mode.
S8, in the flushing process, testing the pressure between the oil inlet and the oil outlet of the filtering unit 40, calculating the pressure difference, and judging whether the pressure difference is within the range of 0.2-0.4MPa of the standard pressure difference; if yes, continuing to use the current filter cylinder; if not, the oil path is adjusted, the current filter cylinder is stopped from being used, and the filter cylinder is switched to another filter cylinder for continuous filtration.
And S9, repeating the steps S7-S8 until the washing is clean.
By adopting the intelligent circulating flushing hydraulic system and the control method, the valve bank unit and the filtering unit which are in bidirectional circulation and intelligent switching are arranged, so that oil ways can be switched quickly and accurately, and multi-component oil pipelines can be flushed sequentially to keep efficient circulating flushing; simultaneously, in the cleaning process, the filter element deposited with particle impurities can be replaced, so that the particle impurities in the oil way can be continuously collected. The control method has thorough flushing, can be recycled for many times, does not need to be watched and operated by personnel, saves the wiring time of a pipe arrangement, and has high flushing efficiency.
The embodiments of the present invention have been described in detail, and the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. An intelligent circulating flushing hydraulic system, comprising:
a valve group unit for controlling the circulation of the flushing oil circuit;
the filtering unit is used for filtering impurities in the oil liquid;
the oil separator unit is used for being communicated with each oil separating pipeline in the hydraulic equipment;
and an oil supply unit for supplying a flushing oil;
the valve group unit is provided with a bidirectional regulating valve group, so that flushing oil output from the oil supply unit can flow into the oil separator unit in the forward direction or the reverse direction to circularly flush each oil distribution pipeline, and impurities in each oil distribution pipeline are flushed and flow into the filtering unit to be deposited;
the filter unit is provided with two groups of filter assemblies which are communicated with each other, and the filter unit can replace a filter element containing impurities and install a new filter element when the flushing oil in the oil separator unit flows back to the oil supply unit through the filter assemblies.
2. The intelligent circulating flushing hydraulic system of claim 1, wherein the valve group unit comprises two sets of the valve groups, each valve group comprises two valves, and the two valves of each valve group are respectively arranged on oil paths of two ports of the oil distributor unit, so that the oil paths in the oil distributor unit can form two opposite-direction and intercommunicated loops.
3. An intelligent recirculating flushing hydraulic system as claimed in claim 2 wherein the two valves of the two sets of valve banks are staggered to form two opposing circuits.
4. An intelligent recirculating flushing hydraulic system as claimed in any one of claims 1 to 3, wherein said oil separator unit comprises:
the oil separator I/oil separator II is provided with a plurality of flexible inlet pipes;
the oil separator II/the oil separator I is provided with a flexible outlet pipe;
the main flushing pipe is directly connected with the valve group unit and the filtering unit, and the auxiliary flushing pipes are connected with oil distributing pipelines in hydraulic equipment;
one end of the main flushing pipe is communicated with the input end/output end of the oil separator I/the oil separator II;
the flexible inlet pipes and the flexible outlet pipes correspond to each other one by one and are communicated and connected with each oil distribution pipeline in the hydraulic equipment through the auxiliary flushing pipes respectively.
5. An intelligent circulating flushing hydraulic system as claimed in claim 4, wherein valves are provided at the ports where the flexible inlet pipe and the flexible outlet pipe communicate with the oil distribution pipe in the hydraulic equipment.
6. An intelligent circulating flushing hydraulic system as claimed in any one of claims 1-3 and 5, characterized in that the filtering component comprises two filtering cartridges, two communicating pipes are arranged between the two filtering cartridges, and a 90 ° bidirectional switching valve for controlling the direction of the oil path is arranged between the two communicating pipes;
one of the communicating pipes is communicated with the output end of the oil separator unit;
the other communicating pipe is communicated with a return end of the oil supply unit.
7. The intelligent recirculating flush hydraulic system of claim 6, wherein each said filter cartridge has a filter element disposed therein; and pressure sensors are arranged at the input end and the output end of the filtering unit.
8. An intelligent circulating flushing hydraulic system as claimed in any one of claims 1-3, 5 and 7, characterized in that the oil supply unit comprises an oil tank, an electric motor and a hydraulic pump, the electric motor is connected with the hydraulic pump; the hydraulic pump is communicated with the oil separator unit; the oil tank is communicated with the filtering unit.
9. A method of controlling an intelligent recirculating flushing hydraulic system, comprising a flushing hydraulic system according to any one of claims 1-8, the steps comprising:
s3, sequentially communicating the output end of the oil supply unit, the valve group unit, the oil separator unit, the filter unit and the input end of the oil supply unit to form a flushable circulation closed loop;
s4, checking the air tightness of the whole circulation loop;
s5, adding flushing oil of the same specification and model as the working oil used in the hydraulic equipment into the oil supply unit;
s6, starting the oil supply unit, adjusting the valve group unit to enable all flushing oil to fill all pipelines in the oil distributor unit through oil pipes, enabling the flushing oil to flow through one filter cartridge in the filter unit for filtering and depositing, and enabling the filtered flushing oil to finally flow back to the oil supply unit through the oil pipes;
s7, the valve banks in the valve bank unit are switched regularly to flush oil distribution pipelines in hydraulic equipment in a bidirectional circulation mode;
s8, testing the pressure between the oil inlet and the oil outlet of the filtering unit, calculating the pressure difference, and judging whether the pressure difference is within the range of 0.2-0.4MPa of the standard pressure difference; if yes, continuing to use the current filter cylinder; if not, adjusting the oil path, stopping using the current filter cylinder and switching to another filter cylinder to continue filtering;
and S9, repeating the steps S7-S8 until the washing is clean.
10. The control method of an intelligent hydronic flushing system of claim 9 further comprising, before said S3:
s1, purging a main flushing pipe directly connected with the valve group unit and the filtering unit and auxiliary flushing pipes connected with oil distributing pipelines in hydraulic equipment in the oil distributor unit by clean and dry compressed air to ensure that all the main flushing pipes and the auxiliary flushing pipes are unblocked;
s2, communicating the valve group unit and the filtering unit with the oil distributor unit through the main flushing pipe respectively; then all oil distributing pipelines in the hydraulic equipment are communicated through the auxiliary flushing pipe; the oil separator unit is communicated with oil separating pipelines in hydraulic equipment.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114985384A (en) * | 2022-04-29 | 2022-09-02 | 中材天安(天津)工程有限公司 | Pipeline debugging method for heavy oil combustion system of cement production line |
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