CN117298703A - Back flush high pressure filtration station main body - Google Patents
Back flush high pressure filtration station main body Download PDFInfo
- Publication number
- CN117298703A CN117298703A CN202210371086.3A CN202210371086A CN117298703A CN 117298703 A CN117298703 A CN 117298703A CN 202210371086 A CN202210371086 A CN 202210371086A CN 117298703 A CN117298703 A CN 117298703A
- Authority
- CN
- China
- Prior art keywords
- valve
- filtering
- pressure surface
- flow channel
- liquid outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011085 pressure filtration Methods 0.000 title claims description 13
- 239000007788 liquid Substances 0.000 claims abstract description 130
- 238000001914 filtration Methods 0.000 claims abstract description 72
- 238000011010 flushing procedure Methods 0.000 claims abstract description 56
- 239000012530 fluid Substances 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 16
- 238000011001 backwashing Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 239000000306 component Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/157—Flow control valves: Damping or calibrated passages
- B01D35/1573—Flow control valves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/16—Valves
- B01D2201/167—Single-way valves
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a back flushing high-pressure filtering station main body, which mainly comprises a filtering assembly, a control element, a cartridge valve core assembly with two-in-one liquid inlet stop valve and a back flushing valve and an integrated valve body. The invention optimizes the valve core and the flow passage, adopts an integral valve body, can complete the functions of other filtering stations which can be completed by combining a plurality of valve bodies, and has the advantages of simple flow passage structure, small pressure loss and few fault points; the valve core is compact in arrangement, so that the space of the valve body can be fully utilized, the structure of the valve body is simplified, and the processing cost is reduced; the integrated cartridge valve core is used, the liquid inlet stop valve and the recoil valve are combined into one, the disassembly and the assembly are convenient, only the valve core needs to be replaced when faults occur, and the maintenance is simple and convenient.
Description
Technical Field
The invention relates to the technical field of mechanical engineering hydraulic pressure, in particular to a back flushing high-pressure filtering station.
Background
The hydraulic element of the underground fully-mechanized coal mining hydraulic support frame is in a highly polluted environment of underground coal dust, an emulsified oil tank of a hydraulic system is extremely easy to be polluted by the coal dust, abnormal abrasion or damage is caused to sealing elements of the hydraulic system, faults frequently occur in the unit time of the hydraulic system, and extremely serious damage is caused to normal operation of fully-mechanized coal mining equipment, so that working media at the source of the hydraulic system must be filtered.
The high-pressure filtering station with the back flushing function is a medium cleaning device which is specially arranged for ensuring the long-time reliable operation of a hydraulic system, is usually arranged at an outlet of a pump station, filters medium pollutants including metal falling chips, sealing broken particles, paint, abrasion particles, broken stone particles, coal cinder and the like before the medium enters a working system, obviously improves the cleanliness of the working medium when the working medium enters a next-stage element system, and creates good conditions for secondary filtering and working conditions of system elements.
The traditional back flushing high-pressure filtering station generally consists of a main body, a controller, a frame and pipelines. The main body is a functional core functional module and mainly comprises a valve body, a filter element arranged on the valve body, a liquid inlet stop valve arranged in the valve body and a backwashing valve. When filtering the hydraulic medium, the liquid inlet stop valve is opened, the back flushing valve is closed, the hydraulic medium enters the liquid inlet stop valve from the liquid inlet channel, flows into the filter element, and the hydraulic medium filtered by the filter element flows out from the liquid outlet channel. During back flushing, the liquid inlet stop valve is closed, the back flushing valve is opened, the hydraulic medium enters the back flushing valve from the liquid inlet channel to back flush the filter element, and the impurity liquid after back flushing is discharged from the back flushing liquid outlet.
In the prior art, a back flushing filtering station is generally controlled manually, a back flushing filter handle is manually pulled to operate a liquid inlet stop valve and a back flushing valve to perform back flushing, and the labor intensity of operators is increased exponentially due to the limitation of underground operation space and working environment, so that the comprehensive mining efficiency is influenced, meanwhile, the reliability is low, and potential safety hazards exist.
In addition, the back flush filtering station in the market generally adopts a mode of matching multiple strings of valve cores to realize the functions of the liquid inlet stop valve and the back flush valve, the filter valve station can only adopt a split type structure, and the valve body is difficult to design and high in processing cost due to the complex internal flow passage of the back flush filter. Meanwhile, due to the complex structure, the liquid is folded back for multiple times in the filtering station, and the pressure loss is large. Because of more internal links, maintenance and fault analysis are time-consuming and labor-consuming. The complex structure is not beneficial to the use and maintenance of the high-pressure filtering station or the high-pressure filter, and is also not beneficial to the design of the backwash filter with high flow, high pressure and high reliability.
Based on the structure, the invention aims to provide a back flushing high-pressure filtering station structure, simplify the internal structure of the filtering station and achieve the purposes of reducing the manufacturing cost and the maintenance cost and improving the performance of the filtering station.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the backwash filter station, the present invention provides a backwash high pressure filter station body.
The technical scheme adopted by the invention is as follows: a backwash high pressure filtration station body comprising: the valve body is internally provided with a liquid inlet flow channel, a liquid outlet flow channel and a back flushing liquid discharge flow channel and provides mounting and fixing positions for other parts of the main body of the filtering station; the filtering component is a filtering working unit, working liquid sequentially flows through the liquid inlet flow channel and the filtering component until the liquid outlet flow channel is in a filtering working state, and sequentially flows through the liquid outlet flow channel and the filtering component until the back flushing liquid outlet flow channel is in a back flushing state; the cartridge valve core assembly is arranged in the valve body and used for switching the flow passage in the valve body to realize the switching of the filtering working state and the backwashing state; and the control element is used for controlling the action of the cartridge valve core assembly.
Preferably: two groups of cartridge valve core components and left and right groups of filter components are arranged in the valve body, and the liquid inlet flow channel, the liquid outlet flow channel and the back flushing liquid outlet flow channel are shared; the filtering station main body is provided with two groups of filtering working states for filtering the filtering components simultaneously, and a backwashing state for filtering the filtering components in one group and backwashing the filtering components in the other group.
Preferably: the valve body is of an integrated structure, and a valve core mounting cavity is further formed in the valve body and used for mounting the cartridge valve core assembly; the liquid inlet flow channel, the liquid outlet flow channel and the back flushing liquid outlet flow channel are mutually independent and are communicated with the valve core installation cavity.
Preferably: the plug-in valve core assembly comprises an outer valve sleeve, an inner sliding sleeve and a valve rod which are installed from outside to inside; the outer valve sleeve is provided with a back flush liquid outlet, a liquid outlet and a liquid inlet, an axial first valve hole and a second valve hole are arranged in the outer valve sleeve, the first valve hole is communicated with the back flush liquid outlet and the liquid outlet, and the second valve hole is communicated with the liquid outlet and the liquid inlet; the inner sliding sleeve and the valve rod respectively realize the opening and closing of the valve hole II and the valve hole I through axial sliding; the sliding sleeve and the valve rod sequentially act or independently act to control the first valve hole and the second valve hole to be opened and closed in a staggered mode.
Preferably: the inner sliding sleeve and the valve rod are respectively provided with a first pressure surface and a second pressure surface, the first pressure surface and the second pressure surface are arranged in opposite directions and form a driving cavity together with the inner wall of the outer valve sleeve, and a control port is arranged on the driving cavity; the driving cavity is pressurized through the control port and acts on the first pressure surface and the second pressure surface to drive the inner sliding sleeve and the valve rod to axially slide respectively; the critical driving pressure of the inner sliding sleeve is Pc1, the critical driving pressure of the valve rod is Pc2, and Pc1 noteq Pc2.
Preferably: the control element is a pilot valve, and a control flow passage is arranged in the valve body and used for communicating the pilot valve with the control port.
Preferably: the inner sliding sleeve and the valve rod are respectively provided with a third pressure surface and a fourth pressure surface, the third pressure surface and the fourth pressure surface are subjected to working fluid pressure in the outer valve sleeve, the third pressure surface and the first pressure surface are opposite to the acting force direction of the inner sliding sleeve, and the fourth pressure surface and the second pressure surface are opposite to the acting force direction of the valve rod.
Preferably: when the control port is pressureless, the fourth pressure surface makes the valve rod tend to prop against the first valve hole under the working fluid pressure, the first valve hole is closed, the third pressure surface makes the inner sliding sleeve tend to be separated from the second valve hole under the working fluid pressure, and the second valve hole is opened; when the control port is pressurized, the second pressure surface is pressurized to drive the valve rod to separate from the first valve hole, the first valve hole is opened, the first pressure surface is pressurized to drive the inner sliding sleeve to prop against the second valve hole, and the second valve hole is closed.
Preferably: the outer valve sleeve is provided with a rear cover, a reset elastic piece is arranged between the valve rod and the rear cover, and the direction of acting force of the reset elastic piece on the valve rod by the driving cavity is opposite.
Preferably: the filter assembly comprises an internal filter element, an external filter cylinder and a seal head.
The invention has the following beneficial effects:
1. the valve core and the flow channel are optimized, and the functions of other filtering stations which can be completed by combining a plurality of valve bodies can be completed by adopting an integral valve body, so that the valve has the advantages of simple flow channel structure, small pressure loss and few fault points;
2. the valve core is compact in arrangement, so that the space of the valve body can be fully utilized, the structure of the valve body is simplified, and the processing cost is reduced;
3. the integrated cartridge valve core is used, the liquid inlet stop valve and the recoil valve are combined into one, the disassembly and the assembly are convenient, only the valve core needs to be replaced when faults occur, and the maintenance is simple and convenient.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Fig. 2 is an exploded view of an embodiment of the present invention.
FIG. 3 is a schematic illustration of a cartridge valve assembly in accordance with an embodiment of the present invention.
FIG. 4 is an assembled cross-sectional view of a cartridge valve core assembly and a valve body in an embodiment of the present invention.
Fig. 5 is a cross-sectional view of a cartridge valve cartridge assembly (filter on condition/control port no pressure) in an embodiment of the invention.
FIG. 6 is a cross-sectional view of a cartridge valve cartridge assembly (backwash status/control port pressurization) in an embodiment of the invention.
FIG. 7 is a cross-sectional view of an inner sleeve and valve stem assembly in accordance with an embodiment of the present invention.
Fig. 8 is a cross-sectional view (internal flow path schematic) of a valve body in an embodiment of the invention.
Fig. 9 is a schematic flow diagram of the working fluid in the valve body (both sides simultaneously filtered) in an embodiment of the present invention.
Fig. 10 is a schematic flow diagram of working fluid in the valve body (left side filtration, right side backwash) in an embodiment of the invention.
The cartridge valve core assembly 1 comprises an outer valve sleeve 11, a back flushing liquid drain 1101, a liquid outlet 1102, a liquid inlet 1103, a valve hole 1104, a valve hole 1105, a driving cavity 1106, a control port 1107, a balance cavity 1108, a balance cavity 1109, a balance port 1110, a screw 1111, an inner sliding sleeve 12, a pressure surface 1201, a pressure surface 1202, a valve rod 13, a pressure surface 1301, a pressure surface 1302, a rod body 1303, a support pad 1304, a sealing pad 1305, a pressing nail 1306, a balance channel 1307, a rear cover 14 and a reset elastic element 15;
the valve comprises a valve body 2, a liquid inlet flow channel 21, a liquid outlet flow channel 22, a back flushing liquid outlet flow channel 23, a valve core mounting cavity 24, a first cavity 2401, a second cavity 2402, a third cavity 2403, a control flow channel 25, a first communication flow channel 26, a second communication flow channel 27 and a third communication flow channel 28;
the filter assembly 3, the filter element 31, the filter cartridge 32 and the seal head 33;
a control element 4.
In fig. 8, 9 and 10, broken lines indicate flow channels and working fluid which cannot be directly shown in the cross section, the arrow direction is the direction of fluid flow when the filtering station is operating normally, and the forking position is the cartridge valve element assembly stop mark.
Detailed Description
The invention will be further described with reference to the drawings and examples.
The back flush high pressure filtration station generally comprises a main body, a controller, a frame and a pipeline, and the embodiment shown in fig. 1-10 is a main body part of the back flush high pressure filtration station, and the main improvement point is that an integrated valve body 2 and a cartridge valve core assembly 1 which combines a liquid inlet stop valve and a back flush valve into a whole are adopted.
As shown in fig. 1, 2, 8-10, the main body of the backwash high-pressure filtering station in this embodiment includes a cartridge valve core assembly 1, a valve body 2, a filtering assembly 3 and a control element 4.
As shown in fig. 2 and 8, the valve body 2 provides mounting and fixing positions for other parts of the main body of the filtering station, and is internally provided with a liquid inlet flow channel 21, a liquid outlet flow channel 22, a back flushing liquid discharge flow channel 23, a valve core mounting cavity 24 and a control flow channel 25, wherein the liquid inlet flow channel 21, the liquid outlet flow channel 22 and the back flushing liquid discharge flow channel 23 are mutually independent and are respectively communicated with the valve core mounting cavity 24 through a first communicating flow channel 26, a second communicating flow channel 27 and a third communicating flow channel 28.
As shown in fig. 1 and 2, the filter assembly 3 is a filter working unit, and comprises an inner filter element 31, an outer filter cartridge 32 and a seal head 33. As shown in fig. 1 and 2, the filter assembly 3 is mounted on a mounting hole of the valve body 2; as shown in fig. 8, the filter assembly 3 is connected in series to the third communication channel 28, and the outer side of the filter element 31 is close to the valve element mounting cavity 24, and the inner side of the filter element 31 is close to the liquid outlet channel 22. As shown in fig. 9, the working fluid sequentially flows through the liquid inlet channel 21, the filtering component 3 and the liquid outlet channel 22 to be in a filtering working state; as shown in fig. 10, the working fluid sequentially flows through the liquid outlet channel 22, the filter assembly 3 and the back flushing liquid outlet channel 23 to be in a back flushing state.
As shown in fig. 1-2 and 8-10, two sets of cartridge valve core assemblies 1 and left and right sets of filter assemblies 3 are arranged in the valve body 2, and share a liquid inlet flow channel 21, a liquid outlet flow channel 22 and a back flushing liquid outlet flow channel 23; the main body of the filtering station is provided with a filtering working state that two groups of filtering components 3 simultaneously filter, and a back flushing state that one group of filtering components 3 filter and the other group of filtering components 3 back flush.
As shown in fig. 4 and 8, a valve element mounting cavity 24 is provided in the valve body 2, and the valve element mounting cavity 24 has a first cavity 2401, a second cavity 2402 and a third cavity 2403 which are mutually communicated and respectively communicated with the liquid inlet flow channel 21, the liquid outlet flow channel 22 and the back flushing liquid outlet flow channel 23. The cartridge valve core assembly 1 is arranged in a runner for switching the valve body 2, so that the switching between the filtering working state and the backwashing state is realized. Specifically, the second cavity 2402 is communicated with the liquid outlet channel 22, the first cavity 2401 is communicated with the liquid inlet channel 21 in a switching-on and switching-off state under the action of the cartridge valve core assembly 1, and the third cavity 2403 is communicated with the back flushing liquid outlet channel 23 in a switching-on and switching-off state under the action of the cartridge valve core assembly 1. The control element 4 is a pilot valve, converts a control electric signal into a control pressure, and controls the cartridge assembly 1 through the control flow path 25.
As shown in fig. 4 to 6, the cartridge valve core assembly 1 comprises an outer valve sleeve 11, an inner valve sleeve 12 and a valve rod 13 which are installed from outside to inside; the outer valve sleeve 11 is provided with a back flushing liquid outlet 1101, a liquid outlet 1102 and a liquid inlet 1103, a first valve hole 1104 and a second valve hole 1105 are arranged in the outer valve sleeve 11 in an axial direction, the first valve hole 1104 is communicated with the back flushing liquid outlet 1101 and the liquid outlet 1102, and the second valve hole 1105 is communicated with the liquid outlet 1102 and the liquid inlet 1103; the inner sliding sleeve 12 and the valve rod 13 respectively realize staggered opening and closing of the valve hole 1105 and the valve hole 1104 through axial sliding.
As shown in fig. 4 to 6, the inner sleeve 12 and the valve rod 13 are respectively provided with a first pressure surface 1201 and a second pressure surface 1301, the first pressure surface 1201 and the second pressure surface 1301 are arranged opposite to each other, and form a driving cavity 1106 together with the inner wall of the outer valve sleeve 11, and a control port 1107 is arranged on the driving cavity 1106; the driving cavity 1106 is pressurized through the control port 1107, acts on the first pressure surface 1201 and the second pressure surface 1301, and is used for driving the inner sliding sleeve 12 and the valve rod 13 to axially slide respectively. In addition, a balancing cavity 1108 and a balancing port 1110 are also arranged in the outer valve sleeve 11, and a balancing channel 1307 is allocated to a balancing cavity 1109 II.
As shown in fig. 4 to 6, the inner sleeve 12 and the valve rod 13 further have a third pressure surface 1202 and a fourth pressure surface 1302, respectively, the third pressure surface 1202 and the fourth pressure surface 1302 are subjected to the pressure of the working fluid in the outer valve sleeve 11, the direction of the acting force of the third pressure surface 1202 and the first pressure surface 1201 on the inner sleeve 12 is opposite, and the direction of the acting force of the fourth pressure surface 1302 and the second pressure surface 1301 on the valve rod 13 is opposite.
As shown in fig. 4 to 6, the first pressure surface 1201 is a step with an outer convex middle portion, when the control port 1107 is pressureless, the first driving action surface 1201 and the second driving action surface 1301 are close to each other, and the step surface of the first driving action surface 1201 is aligned to the position of the control port 1107.
As shown in fig. 4 to 6, the outer valve sleeve 11 is provided with a rear cover 14, the rear cover 14 is fixed with the outer valve sleeve 11 into a whole by adopting a screw 1111 mode, a reset elastic member 15 is arranged between the valve rod 13 and the rear cover 14, the direction of acting force of the reset elastic member 15 and the driving cavity 1106 on the valve rod 13 is opposite, and the reset elastic member 15 is a compression spring.
As shown in fig. 7, the inner sleeve 13 and the valve stem 13 are assembled in cross-section.
As shown in fig. 4, after the cartridge valve core assembly 1 is assembled into the valve body 2, the back flush drain port 1101 is communicated with the back flush drain flow channel 23, and is generally in a non-pressure or low-pressure state; the liquid outlet 1102 is communicated with the liquid outlet flow passage 22; the liquid inlet 1103 is communicated with the liquid inlet flow passage 21 and is usually in a high-pressure state; the control port 1107 is communicated with the control flow channel 25 and is controlled by a pilot valve for controlling the control pressure of back flushing; in addition, the balance port 1110 is also connected to the backwash liquid discharge line.
After the cartridge valve core assembly 1 of the present embodiment is assembled into the valve body 2 according to fig. 4, the working principle and process thereof are as follows:
(1) As shown in fig. 4 and 5, in the default state, the control port 1107 is pressureless, at this time, the inner sliding sleeve 12 is in a retracted state under the action of working fluid pressure, the second valve hole 1105 is opened, and the liquid outlet 1102 is communicated with the liquid inlet 1103; at this time, the valve rod 13 corresponds to a one-way valve, and blocks the valve hole 1104 to block the connection between the back flush liquid outlet 1101 and the liquid inlet 1103. At this time, the cartridge 31 corresponding to the cartridge assembly 1 is in the filtering operation state.
(2) As shown in fig. 6, during back flushing, control pressure is applied to the control port 1107, the inner sliding sleeve 12 stretches out under the action of the control pressure, and the connection between the liquid inlet 1103 and the liquid outlet 1102 is disconnected; simultaneously, the valve rod 13 is retracted under the action of control pressure, and the liquid outlet 1103 is communicated with the back flushing liquid outlet 1101. The high-pressure liquid on the liquid outlet side of the filter element 31 reversely flows back to the liquid inlet side of the filter element 31, and is discharged out of the filtering station after passing through the liquid outlet 1102 and the back flushing liquid outlet 1101 of the cartridge valve core assembly 1, so that back flushing of the filter element 31 is realized.
(3) When the control pressure of the control port 1107 is removed, the valve rod 13 becomes a one-way valve again, and the valve hole 1104 extends out and closes under the combined action of the elastic piece 15 and the working liquid pressure, namely the back flushing liquid discharge port 1101 and the liquid inlet 1103 are cut off; the inner sliding sleeve 12 is retracted under the pressure of the working fluid, so that the liquid outlet 1102 is communicated with the liquid inlet 1103. I.e. reverts to the state in fig. 5.
As shown in fig. 7, the bearing areas of the first pressure surface 1201, the second pressure surface 1301, the third pressure surface 1202 and the fourth pressure surface 1302 are A1, A2, A3, A4, respectively, and the actual calculated areas are annular in fig. 7. The first pressure surface 1201 and the second pressure surface 1301 are both subjected to the control pressure in the driving chamber 1106, and the third pressure surface 1202 and the fourth pressure surface 1302 are both subjected to the high-pressure working fluid pressure P0.
The critical driving pressure of the inner sleeve 12 is Pc1, and the critical driving pressure of the valve stem 13 is Pc2. Then, the critical condition for sliding movement of the inner sleeve 12 is p1a1=p0a3, i.e., p1=p0a3/A1; the critical condition for the sliding of the valve stem 13 is Pc2A2=P0A4, i.e. Pc2=P0A4/A2.
In particular, it is required to satisfy Pc1 < Pc2, i.e., A3/A1 < A4/A2. Under this condition, when the control port 1107 in the above-mentioned process (2) is pressurized step by step, pc1 is reached first, that is, the inner sliding sleeve 12 acts before the valve rod 13; when the control port 1107 in the above process (3) is depressurized step by step, pc2 is reached first, that is, the valve rod 13 moves before the inner sliding sleeve 12.
From the above, the cartridge valve core assembly 1 performs the pushing and pulling actions on the inner sliding sleeve 12 and the valve rod 13 under the action of the same driving cavity 1106, so as to realize the switching of the liquid paths of the filtering and backwashing of the filter core 31. And the sequential actions of the inner sliding sleeve 12 and the valve rod 13 are realized through the difference of hydraulic pressure action areas: the inner slide sleeve 12 acts before the valve rod 13 during back flushing operation; at the end of back flushing, the valve rod 13 is reset before the inner sliding sleeve 12.
After the cartridge valve core assembly 1 of the present embodiment is assembled into the valve body 2 according to fig. 2, the working principle and process of the whole filtering station main body are as follows:
(1) In the state of filtering operation, as shown in fig. 9, high-pressure working fluid enters the valve body 2 from the fluid inlet channel 21, passes through the cartridge valve core assembly 1 and the filter element 31 in sequence, and is output from the fluid outlet channel 22.
(2) After the back flushing is started, as shown in fig. 10 (left normal filtering operation, right back flushing), the liquid inlet 1103 of the cartridge valve assembly 1 on the right side is blocked under the action of the pilot valve control pressure, and the liquid outlet 1102 is communicated with the back flushing liquid outlet 1101. The clean high-pressure liquid generated by filtering the left filter element 31 is divided into 2 paths, wherein one path is normally output from the liquid outlet channel 22 of the filtering station, and the other path is used for back flushing the right filter element 31. The high-pressure liquid reversely flows in the filter element 31 on the right side (flows outwards from the core) to form back flushing on the filter element 31, and the back flushing liquid is discharged to the outside of the filtering station from the back flushing liquid discharge flow channel 23 of the valve body 2 after passing through the liquid outlet 1102 and the back flushing liquid discharge port 1101 of the cartridge valve core assembly 1 on the right side. When the control pressure of the control element 4, namely the pilot valve is removed, the cartridge valve core assembly 1 on the right side is reset, and the filtering station is restored to a normal working state of filtering at the two sides simultaneously.
(3) The liquid flow relation of the left back flushing and the right normal working is symmetrical to the process.
As can be seen from the above, the present embodiment can complete the functions of other filtering stations that can be completed by combining a plurality of valve bodies by using one valve body 2, and has the advantages of simple flow channel structure, low pressure loss and few fault points; the valve core 31 is compact in arrangement, so that the space of the valve body can be fully utilized, the structure of the valve body is simplified, and the processing cost is reduced; the cartridge valve core assembly 1 is used, the liquid inlet stop valve and the recoil valve are combined into a whole, and only the valve core needs to be replaced when a fault occurs, so that the maintenance is simple and convenient.
It should be noted that, the cartridge valve assembly 1 in the main body of the filtering station of the present embodiment may be replaced by a multifunctional valve or a valve block of other types, for example, CN112855993a, and only needs to implement the functions of the liquid inlet stop valve and the recoil valve at the same time.
It is apparent that the above examples of the present invention are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Obvious changes and modifications which come within the spirit of the invention are desired to be protected.
Claims (10)
1. A backwash high pressure filtration station body comprising:
the valve body (2) is internally provided with a liquid inlet flow channel (21), a liquid outlet flow channel (22) and a back flushing liquid discharge flow channel (23) and provides mounting and fixing positions for other parts of the main body of the filtering station;
the filtering component (3) is a filtering working unit, working liquid sequentially flows through the liquid inlet flow channel (21) and the filtering component (3) to the liquid outlet flow channel (22) to be in a filtering working state, and sequentially flows through the liquid outlet flow channel (22) and the filtering component (3) to the back flushing liquid outlet flow channel (23) to be in a back flushing state;
the cartridge valve core assembly (1) is arranged in the valve body (2) and is used for switching a flow passage in the valve body (2) to realize the switching of the filtering working state and the backwashing state;
and the control element (4) is used for controlling the action of the cartridge valve core assembly (1).
2. The backwash high-pressure filtering station main body according to claim 1, wherein two groups of the cartridge valve core assemblies (1) and the left and right groups of the filtering assemblies (3) are arranged in the valve body (2), and the liquid inlet flow channel (21), the liquid outlet flow channel (22) and the backwash liquid outlet flow channel (23) are shared; the filtering station main body is provided with two groups of filtering working states for filtering the filtering components (3) simultaneously, and a backwashing state for filtering the filtering components (3) and backwashing the filtering components (3) in one group.
3. A backwash high pressure filtration station body according to claim 1 or 2 wherein said valve body (2) is of unitary construction and is internally provided with a cartridge mounting cavity (24) for mounting said cartridge assembly (1); the liquid inlet flow channel (21), the liquid outlet flow channel (22) and the back flushing liquid outlet flow channel (23) are mutually independent and are communicated with the valve core mounting cavity (24).
4. A backwash high pressure filter station body as described in claim 3 wherein,
the plug-in valve core assembly (1) comprises an outer valve sleeve (11), an inner sliding sleeve (12) and a valve rod (13) which are installed from outside to inside;
the outer valve sleeve (11) is provided with a back flushing liquid outlet (1101), a liquid outlet (1102) and a liquid inlet (1103), an axial first valve hole (1104) and a second valve hole (1105) are arranged in the outer valve sleeve (11), the first valve hole (1104) is communicated with the back flushing liquid outlet (1101) and the liquid outlet (1102), and the second valve hole (1105) is communicated with the liquid outlet (1102) and the liquid inlet (1103);
the inner sliding sleeve (12) and the valve rod (13) respectively realize the opening and closing of the valve hole II (1105) and the valve hole I (1104) through axial sliding;
the sliding sleeve (12) and the valve rod (13) sequentially act or independently act to control the first valve hole (1104) and the second valve hole (1105) to be opened and closed in a staggered mode.
5. The backwash high pressure filtration station body of claim 4 wherein: the inner sliding sleeve (12) and the valve rod (13) are respectively provided with a first pressure surface (1201) and a second pressure surface (1301), the first pressure surface (1201) and the second pressure surface (1301) are arranged opposite to each other and form a driving cavity (1106) together with the inner wall of the outer valve sleeve (11), and a control port (1107) is arranged on the driving cavity (1106);
the driving cavity (1106) is pressurized through the control port (1107) and acts on the first pressure surface (1201) and the second pressure surface (1301) to drive the inner sliding sleeve (12) and the valve rod (13) to axially slide respectively;
the critical driving pressure of the inner sleeve (12) is Pc1, the critical driving pressure of the valve rod (13) is Pc2, and Pc1+notepc2.
6. The backwash high pressure filtration station body of claim 5 wherein: the control element (4) is a pilot valve, and a control flow passage (25) is arranged in the valve body (2) and is used for communicating the pilot valve with the control port (1107).
7. The backwash high pressure filtration station body of claim 5 wherein: the inner sliding sleeve (12) and the valve rod (13) are further provided with a third pressure surface (1202) and a fourth pressure surface (1302) respectively, the third pressure surface (1202) and the fourth pressure surface (1302) are subjected to working fluid pressure in the outer valve sleeve (11), the third pressure surface (1202) and the first pressure surface (1201) are opposite to the acting force direction of the inner sliding sleeve (12), and the fourth pressure surface (1302) and the second pressure surface (1301) are opposite to the acting force direction of the valve rod (13).
8. The backwash high pressure filtration station body of claim 7 wherein:
when the control port (1107) is pressureless,
the fourth pressure surface (1302) makes the valve rod (13) tend to prop against the first valve hole (1104) under working liquid pressure, the first valve hole (1104) is closed, the third pressure surface (1202) makes the inner sliding sleeve (12) tend to be separated from the second valve hole (1105) under working liquid pressure, and the second valve hole (1105) is opened;
when the control port (1107) is pressurized,
the second pressure surface (1301) is pressed to drive the valve rod (13) to be separated from the first valve hole (1104), the first valve hole (1104) is opened, the first pressure surface (1201) is pressed to drive the inner sliding sleeve (12) to be propped against the second valve hole (1105), and the second valve hole (1105) is closed.
9. The backwash high pressure filtration station body of claim 5 wherein: the valve is characterized in that the outer valve sleeve (11) is provided with a rear cover (14), a reset elastic piece (15) is arranged between the valve rod (13) and the rear cover (14), and the direction of acting force of the reset elastic piece (15) to the valve rod (13) is opposite to that of the driving cavity (1106).
10. The backwash high pressure filtration station body of claim 1 wherein: the filter assembly (3) comprises an internal filter element (31), an external filter cylinder (32) and a seal head (33).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111642416X | 2021-12-30 | ||
| CN202111642416 | 2021-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117298703A true CN117298703A (en) | 2023-12-29 |
Family
ID=89241226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210371086.3A Pending CN117298703A (en) | 2021-12-30 | 2022-04-11 | Back flush high pressure filtration station main body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117298703A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU226509U1 (en) * | 2024-03-12 | 2024-06-06 | Общество с ограниченной ответственностью "Системы промышленной безопасности - ЦНР" | INSERT VALVE |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101766927A (en) * | 2010-02-17 | 2010-07-07 | 浙江丰隆液压元件有限公司 | High-pressure and high-precision backwashing filtration station |
| CN103212235A (en) * | 2013-03-13 | 2013-07-24 | 宁波长壁流体动力科技有限公司 | Electric control backwashing filter |
| CN103334776A (en) * | 2013-05-28 | 2013-10-02 | 山西平阳广日机电有限公司 | Integral plug-in valve core assembly for hand-operated direction valve |
| CN103623630A (en) * | 2013-12-02 | 2014-03-12 | 中煤北京煤矿机械有限责任公司 | Full-automatic high-pressure back-flushing filtering station |
| JP2015085256A (en) * | 2013-10-30 | 2015-05-07 | 株式会社岡常歯車製作所 | Filter device |
-
2022
- 2022-04-11 CN CN202210371086.3A patent/CN117298703A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101766927A (en) * | 2010-02-17 | 2010-07-07 | 浙江丰隆液压元件有限公司 | High-pressure and high-precision backwashing filtration station |
| CN103212235A (en) * | 2013-03-13 | 2013-07-24 | 宁波长壁流体动力科技有限公司 | Electric control backwashing filter |
| CN103334776A (en) * | 2013-05-28 | 2013-10-02 | 山西平阳广日机电有限公司 | Integral plug-in valve core assembly for hand-operated direction valve |
| JP2015085256A (en) * | 2013-10-30 | 2015-05-07 | 株式会社岡常歯車製作所 | Filter device |
| CN103623630A (en) * | 2013-12-02 | 2014-03-12 | 中煤北京煤矿机械有限责任公司 | Full-automatic high-pressure back-flushing filtering station |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU226509U1 (en) * | 2024-03-12 | 2024-06-06 | Общество с ограниченной ответственностью "Системы промышленной безопасности - ЦНР" | INSERT VALVE |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1769749B (en) | Electromagnetic valve for liquid flow | |
| CA1150218A (en) | Flush valve piston having filtered orifice | |
| EP1564460A1 (en) | Relief valve | |
| CN102859080B (en) | Double check valve for construction equipment | |
| CN111197658B (en) | Pilot valve actuated control guide for operating valve | |
| KR101763282B1 (en) | Construction equipment pressure control valve | |
| DK2483560T3 (en) | Pump to pressure | |
| CN103212235B (en) | Automatically controlled backwash filter | |
| CN211039253U (en) | Bidirectional pipeline filter of hydraulic pipeline system | |
| CN117298703A (en) | Back flush high pressure filtration station main body | |
| CN218280813U (en) | High-pressure backwashing filter station | |
| CN100485196C (en) | Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode | |
| CN117267217A (en) | Cartridge valve core assembly | |
| CN113983017B (en) | Multi-way valve reversing linkage and hydraulic system | |
| CN112555218B (en) | Valve body structure of reversing valve | |
| CN219681861U (en) | Electromagnetic pilot-controlled backwash filter | |
| CN203075745U (en) | Electrically-controlled backwash filter | |
| CN108662208B (en) | Hydraulic control valve with symmetrical structure | |
| CN210423842U (en) | Two-way circulation filter | |
| CN2906159Y (en) | Electrohydraulic unloading valve with hydraulic control and electrohydraulic control operation modes | |
| CN109395449B (en) | Gas-water double-path liquid control backflushing filter | |
| CN208169656U (en) | A kind of pneumatic valve device | |
| CN113137254A (en) | Valve element assembly and bidirectional lock | |
| CN112855993A (en) | Valve element assembly and backwashing filter | |
| CN111520507A (en) | Automatic flushing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |