Disc type filter assembly with backwashing mechanism

Abstract

The invention discloses a disc type filtering assembly with a backwashing mechanism. The disc type filtering assembly comprises a filtered water drainage pipe, a water inlet pipe, a waste liquid outlet pipe and a plurality of groups of water filtering structures mounted at the upper part of the filtered water drainage pipe. According to the present invention, the electromechanical integration intelligent design is adopted, the system pressure difference is monitored in real time through the high-precision pressure sensor, the PLC control system immediately starts the backwashing program when the detected pressure difference exceeds the preset value, the system firstly closes the water inlet pipe electric valve and simultaneously opens the waste liquid outlet pipe valve, and the electric push rod immediately drives the liquid collection pipe to rotate by 35 degrees so as to complete the backwashing process; the EPDM rubber sealing plate accurately covers a filtering liquid leakage hole, an air compressor in the air compressor bin synchronously works, compressed air is injected into the sealing box cover through the air supply pipe, the system pressure is increased to 0.6 MPa within 15 seconds, high-speed reverse water flow of 3 m / s is formed to strongly flush the laminated filter group, and sewage after flushing is discharged to the waste liquid outlet pipe through the central through hole and the Deubin rotary joint.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and particularly to a disc-type filtering component with an anti-flushing mechanism. Background Art

[0002] In the field of water treatment, disc filters are widely used in industrial water treatment, seawater desalination pretreatment, circulating cooling water systems, etc. due to their advantages such as compact structure and high filtration efficiency. However, in the long-term operation process of traditional disc filters, there are technical bottlenecks such as easy clogging of filter discs, incomplete backwashing, and low automation degree. In the prior art, the backwashing methods are mainly divided into two forms: hydraulic backwashing and air-water combined backwashing, but there are generally problems such as high backwashing energy consumption, uneven water flow distribution, and poor sealing performance. Especially when treating raw water with high turbidity (NTU>50), traditional backwashing technologies often cannot completely remove the fine particles intercepted between the filter discs, resulting in a gradual decrease in filtration efficiency, an increase in backwashing frequency, and seriously affecting the operation stability of the system.

[0003] In the existing patented technologies, although there are design schemes using a rotary filter element structure, the following technical defects are found in actual applications: 1) The sealing performance of the mechanical rotation mechanism is insufficient and it is easy to leak under high-pressure conditions; 2) The backwashing trigger mechanism is single, and mostly uses timing control rather than intelligent judgment based on the actual clogging degree; 3) The backwashing water flow velocity is insufficient (usually <2m / s), resulting in unsatisfactory washing effect; 4) The system integration degree is low and the coordination of each functional module is poor. In addition, the maintenance convenience of the existing equipment also needs to be improved. Replacing the filter discs often requires disassembling multiple components, which is time-consuming and laborious.

[0004] In view of the above technical problems, there is an urgent need to develop a new type of disc-type filtering component, which should have innovative functions such as intelligent differential pressure monitoring, high-efficiency mechanical sealing, and powerful backwashing, and at the same time take into account practical requirements such as energy conservation, environmental protection, and easy operation. Especially in terms of automatic control, accurate timing control and multi-parameter coordinated adjustment need to be realized to ensure that the backwashing process can thoroughly clean the filter discs without causing excessive energy consumption and water resource waste. Therefore, there is a need for a disc-type filtering component with an anti-flushing mechanism now. Summary of the Invention

[0005] The purpose of the present invention is to provide a disc-type filtering component with an anti-flushing mechanism. The technical breakthrough of this system lies in the perfect combination of precision machinery, intelligent control, and high-efficiency flushing technology, solving the problems of incomplete flushing and low automation degree of traditional filters, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A disc filter assembly with a backwashing mechanism, comprising a filtered water drain pipe, a water inlet pipe, a waste liquid outlet pipe, and a plurality of groups of water filtering structures installed on the upper part of the filtered water drain pipe;

[0007] The filtered water drain pipe, the water inlet pipe, and the waste liquid outlet pipe are respectively connected and installed in communication with the water filtering structure;

[0008] The water filtering structure includes a filter box base located on the upper part of the filtered water drain pipe, a mounting plate installed inside the filter box base, a liquid collecting pipe rotatably installed under the mounting plate, a stack disc filter group inserted on the upper part of the mounting plate, and a sealed box cover sealed and connected to the filter box base;

[0009] A pressurizing structure is connected and installed at the top of the sealed box cover, and a pressure monitoring structure is installed inside the sealed box cover.

[0010] Preferably, a set of positioning seats are respectively sleeved and installed at both ends of the filtered water drain pipe, a set of support frames are respectively installed on the outer surfaces of the two sets of positioning seats, the installation positions of the two sets of support frames are opposite, and a set of electric push rods are respectively installed on the corresponding sides of the two sets of support frames. A set of docking seats are respectively installed through the outer arc surface of the filtered water drain pipe corresponding to each group of water filtering structures.

[0011] Preferably, a set of limiting structures are installed at the positions of the outer arc surface of the filtered water drain pipe corresponding to each set of docking seats. The limiting structure includes two groups of arc-shaped positioning plates symmetrically installed on the surface of the filtered water drain pipe. A set of support plates are fixedly installed at the top ends of each group of arc-shaped positioning plates, a set of limiting sealing plates are respectively installed on the corresponding sides of the two sets of support plates, and a set of first connecting plates for connection are respectively installed at both ends of the two sets of limiting sealing plates.

[0012] Preferably, a set of electric valves are respectively installed on the outer arc surface of the filter box base corresponding to the water inlet pipe and the waste liquid outlet pipe. A shaft seal is installed at the bottom of the filter box base, a rotating seat is hermetically installed at the bottom of the shaft seal, and two sets of second connecting plates are symmetrically installed on the outer arc surface of the rotating seat.

[0013] Preferably, a liquid leakage pipe is fixedly installed at the center of the rotating seat. The bottom end of the liquid leakage pipe is rotatably inserted into the inside of the docking seat. The top end of the liquid leakage pipe extends into the inside of the filter box base from inside the shaft seal, and a plurality of groups of liquid collecting pipes are connected and installed at the top end of the liquid leakage pipe. A water outlet head is opened at the top end of each group of liquid collecting pipes, and a set of sealing plates are fixedly installed on the outer arc surface of each group of liquid collecting pipes.

[0014] Preferably, a stress rod is installed inside several groups of second connecting plates on the same side of the outer arc surface of each rotating seat, and a positioning shaft is installed at the position of each group of second connecting plates corresponding to the stress rod. The base of the filter box is rotatably installed inside the second connecting plate, and a push plate is installed at the position of each stress rod corresponding to each side of the electric push rod. A sliding groove is formed inside the push plate, the stress rod is slidably connected with the push plate, and the push plate is bolted to the telescopic end of the electric push rod.

[0015] Preferably, a mounting plate is snap-fitted inside the base of the filter box. The mounting plate is provided with several filter liquid leakage holes penetrating up and down in an equiangular manner. A limiting bottom groove is formed at the position corresponding to the filter liquid leakage holes at the bottom of the mounting plate. A central through hole is formed through the center of the mounting plate, and a sealing socket is installed on the upper surface of the mounting plate corresponding to the position of the central through hole.

[0016] Preferably, a sealing base is installed at the bottom of the stacked filter element group. A rubber insertion hole is formed at the center of the sealing base. The sealing base is attached to the surface of the mounting plate, and the rubber insertion hole is hermetically inserted into the sealing socket. A positioning socket is installed through the top end of the stacked filter element group.

[0017] Preferably, the pressure testing structure includes a pressure display instrument installed on the upper part of the sealing box cover. The bottom of the pressure display instrument extends into the sealing box cover, and a first pressure measuring probe and a second pressure measuring probe are respectively installed at the detection end of the pressure display instrument. The first pressure measuring probe is located inside the sealing box cover. A plug is installed on the outer arc surface of the second pressure measuring probe. The second pressure measuring probe is inserted into the stacked filter element group, and the plug is hermetically inserted into the positioning socket. A pressure alarm instrument is installed through the front side of the sealing box cover, and the pressure display instrument is electrically connected to the pressure alarm instrument.

[0018] Preferably, the pressurizing structure includes an air compressor chamber installed on one side of the filtered water drain pipe. A positioning frame is arranged at the bottom of the air compressor chamber. The output end of the air compressor chamber is connected and installed with an air supply pipe. The air supply pipe is connected and installed with an electric control valve corresponding to each filter water structure. A one-way air valve is connected and installed at the bottom of the electric control valve. A connecting pipe is connected and installed at the bottom of the one-way air valve, and the connecting pipe is hermetically connected to the sealing box cover.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention adopts mechatronic intelligent design. The differential pressure of the system is monitored in real time by a high-precision pressure sensor. When the detected differential pressure exceeds the preset value, the PLC control system immediately starts the backwashing program. First, the electric valve of the water inlet pipe is closed, and at the same time, the valve of the waste liquid outlet pipe is opened. Then, the electric push rod drives the liquid collecting pipe to rotate 35°, so that the EPDM rubber sealing plate accurately covers the filter liquid leakage holes. The air compressor inside the air compressor chamber works synchronously, and compressed air is injected into the sealing box cover through the air supply pipe, and the system pressure is increased to 0.6 MPa within 15 seconds to form a high-speed reverse water flow of 3 m / s to strongly wash the stacked filter element group. The flushed sewage is discharged to the waste liquid outlet pipe through the central through hole and the Deublin rotary joint.

[0021] 2. The modular quick-release design enables the filter element to be replaced within 5 minutes. This device is particularly suitable for treating liquids with high turbidity (NTU > 50). The backwashing cycle is adjustable from 2 to 8 hours, the water recovery rate is ≥ 95%, it is more energy-efficient than traditional filters by more than 30%, the maintenance cost is reduced by 40%, the SDI value can be stably controlled at less than 3 in seawater desalination pretreatment, fully meeting the requirements of 3A sanitary standards. The intelligent control system supports remote monitoring via the Modbus RTU protocol, and is equipped with an air storage tank and a Venturi effect design to ensure the flushing effect. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure split of the present invention;

[0024] Figure 3 It is a schematic diagram of the split installation structure of the filter box base of the present invention;

[0025] Figure 4 It is a schematic diagram of the overall structure of the filtered water drain pipe of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation structure of the limit sealing plate of the present invention;

[0027] Figure 6 It is a schematic diagram of the installation structure of the liquid collecting pipe of the present invention;

[0028] Figure 7 It is a schematic diagram of the split installation structure of the stacked filter element group of the present invention;

[0029] Figure 8 It is a schematic diagram of the split installation structure of the pressure alarm instrument of the present invention;

[0030] Figure 9 It is a schematic diagram of the overall installation plate of the present invention;

[0031] Figure 10Schematic diagram of the bottom structure of the mounting plate of the present invention;

[0032] Figure 11 Schematic diagram of the mounting structure of the force-bearing rod of the present invention;

[0033] Figure 12 Schematic diagram of the mounting structure of the connecting pipe of the present invention.

[0034] In the figure: 1, filtered water drain pipe; 2, positioning seat; 3, support frame; 4, electric push rod; 5, docking seat; 6, arc-shaped positioning plate; 7, support plate; 8, limit sealing plate; 9, first connecting plate; 10, filter box base; 11, electric valve; 12, shaft seal; 13, rotating seat; 14, second connecting plate; 15, liquid leakage pipe; 16, liquid collecting pipe; 17, downcomer; 18, sealing plate; 19, force-bearing rod; 20, positioning shaft; 21, push plate; 22, sliding groove; 23, mounting plate; 24, filtered liquid leakage hole; 25, limit bottom groove; 26, central through hole; 27, sealing socket; 28, stack-type filter element group; 29, sealing base; 30, rubber socket; 31, positioning socket; 32, sealing box cover; 33, pressure display instrument; 34, first pressure measuring probe; 35, second pressure measuring probe; 36, plug; 37, pressure alarm instrument; 38, water inlet pipe; 39, waste liquid outlet pipe; 40, one-way liquid valve; 41, positioning frame; 42, air compressor chamber; 43, air supply pipe; 44, electric control valve; 45, one-way air valve; 46, connecting pipe. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] The present invention provides: a disc-type filter assembly with a backwashing mechanism, as Figures 1-12As shown, it includes a filtered water drain pipe 1, a water inlet pipe 38, a waste liquid outlet pipe 39, and several groups of water filtration structures installed above the filtered water drain pipe 1. The filtered water drain pipe 1, the water inlet pipe 38, and the waste liquid outlet pipe 39 are respectively used to distinguish water inlet, water filtration, and waste liquid discharge, which can improve the treatment of dirt in the water filtration structure, enable the filtered clean water and the waste liquid in the water filtration structure to be discharged separately, and improve the water treatment performance and the safety of the overall device during use;

[0038] The filtered water drain pipe 1, the water inlet pipe 38, and the waste liquid outlet pipe 39 are respectively connected and installed in communication with the water filtration structure. The overall device is connected through the water filtration structure, so that all water is treated through the water filtration structure;

[0039] The water filtration structure includes a filtration box base 10 located above the filtered water drain pipe 1, a mounting plate 23 installed inside the filtration box base 10, a liquid collecting pipe 16 rotatably installed below the mounting plate 23, a stacked filter element 28 inserted above the mounting plate 23, and a sealing box cover 32 sealingly connected to the filtration box base 10. The installed filtration box base 10 limits the mounting plate 23, and the stacked filter element 28 above the mounting plate 23 ensures the filtration of water. In addition, it cooperates with the sealing box cover 32 sealingly connected to the filtration box base 10 to ensure the retention of water inside the sealing box cover 32. The liquid collecting pipe 16 rotatably installed at the bottom of the mounting plate 23 is used to select the discharge of wastewater and clean water, so that the water filtered by the stacked filter element 28 can be discharged through the filtered water drain pipe 1. After rotating the liquid collecting pipe 16, only the position penetrating the mounting plate 23 retains the connection with the center and the stacked filter element 28, so that the impurities inside the stacked filter element 28 flow down through the mounting plate 23 and are discharged through the waste liquid outlet pipe 39;

[0040] A pressurizing structure is connected and installed at the top of the sealing box cover 32, and a pressure monitoring structure is installed inside the sealing box cover 32. The set pressurizing structure is used to ensure that the pressure inside the sealing box cover 32 is increased during the backwashing of the stacked filter element 28, so that the dirt inside the stacked filter element 28 can be quickly sent out. In addition, the set pressure detection structure can monitor the water pressure inside the sealing box cover 32 and inside the stacked filter element 28, so that the pressure alarm 37 can stably control the use of the two electric valves 11 and the electric push rod 4, thereby changing the overall use state of the device.

[0041] Preferably, a set of positioning seats 2 are sleeved and installed at both ends of the filtered water drain pipe 1. A set of support frames 3 are respectively installed on the outer surfaces of the two sets of positioning seats 2. The installation positions of the two sets of support frames 3 are opposite, and a set of electric push rods 4 are respectively installed on the corresponding sides of the two sets of support frames 3. A set of docking seats 5 are respectively installed through the outer arc surface of the filtered water drain pipe 1 corresponding to each water filtration structure. The positioning seats 2 installed at both ends of the filtered water drain pipe 1 ensure the overall stability of the filtered water drain pipe 1 during use, and the support frames 3 installed on the outer sides of the positioning seats 2 limit the electric push rods 4. The two electric push rods 4 need to be equipped with position feedback devices such as encoders, potentiometers or Hall sensors, and controllers such as PLCs and motion control cards that support multi-axis synchronization algorithms such as electronic gears and electronic cams. The implementation method for the two electric push rods 4 to work synchronously is to specify one electric push rod 4 as the main axis and the other as the slave axis. The controller reads the position of the main axis in real time and dynamically adjusts the speed / position of the slave axis to ensure synchronization between the two. At the same time, through parallel control, the controller sends synchronous instructions to the two push rods simultaneously, combines the PID algorithm to adjust the output in real time to eliminate errors, and uses bus communication and real-time communication protocols such as CANopen and EtherCAT to ensure instruction synchronization and low-latency feedback. The set electric push rod 4 used is a JC6 DC small electric push rod, which features a maximum thrust of 200N, a maximum speed of 230mm / s, a compact volume, an aluminum alloy material, a light weight, an internal micro switch for automatic stop, and an IP54 protection rating, and is suitable for 12 / 24 / 36V DC power supplies.

[0042] Furthermore, a set of limiting structures is installed on the outer arc surface of the filtered water drain pipe 1 corresponding to the position of each docking seat 5. The limiting structure includes two sets of arc-shaped positioning plates 6 symmetrically installed on the surface of the filtered water drain pipe 1. A set of support plates 7 is fixedly installed at the top of each set of arc-shaped positioning plates 6. A set of limiting seal plates 8 is installed on the corresponding sides of the two sets of support plates 7. A set of first connecting plates 9 for connection is installed at both ends of the two sets of limiting seal plates 8. The docking seat 5 installed on the outer arc surface of the filtered water drain pipe 1 is connected to the liquid leakage pipe 15 in each filtering structure, ensuring its rotationality and sealing performance while ensuring its sealing performance. The specific connection method is to use a stainless steel rotary joint such as the Deublin series or a domestic MFC rotary seal joint. Structural features: It uses a mechanical seal spring + graphite / ceramic seal ring inside, can withstand a high pressure of more than 40 bar, the shell is made of stainless steel, supports 360° continuous rotation, and is suitable for various media such as water, gas, and oil. Advantages: High sealing performance, long service life, supports high temperature and high pressure, and ensures the sealing performance of the liquid leakage pipe 15 and the liquid collecting pipe 16 during the rotation process. In addition, the arc-shaped positioning plates 6 and the support plates 7 are provided to ensure the docking of the limiting seal plates 8. The two sets of limiting seal plates 8 make the first connecting plates 9 fit during the docking process, and the first connecting plates 9 are connected by bolts. The two sets of limiting seal plates 8 provided are attached to the connection between the filter box base 10 and the sealing box cover 32 during the locking process, further improving the stability and sealing performance of the connection between the filter box base 10 and the sealing box cover 32, and preventing water from leaking out from the connection between the sealing box cover 32 and the filter box base 10.

[0043] Furthermore, a set of electric valves 11 is installed on the outer arc surface of the filter box base 10 corresponding to the water inlet pipe 38 and the waste liquid outlet pipe 39 respectively. A shaft seal 12 is installed at the bottom of the filter box base 10. A rotating seat 13 is hermetically installed at the bottom of the shaft seal 12. Two sets of second connecting plates 14 are symmetrically installed on the outer arc surface of the rotating seat 13. The two sets of electric valves 11 provided outside the filter box base 10 control the liquid flow direction. Since both the liquid inlet and the waste liquid discharge need to complete the temporary guiding work through the filter box base 10, the liquid output state is changed after a single set of electric valves 11 is closed.

[0044] It is worth noting that a leakage pipe 15 is fixedly installed at the center of the rotating seat 13, and the bottom end of the leakage pipe 15 is rotated to be inserted into the interior of the docking seat 5. The top of the leakage pipe 15 extends from the inside of the shaft seal 12 into the interior of the filter box base 10, and the top of the leakage pipe 15 is connected with a plurality of groups of liquid collecting pipes 16. Each group of liquid collecting pipes 16 has a water head 17 at the top, and a group of sealing plates 18 are fixedly installed on the outer arc surface of each group of liquid collecting pipes 16. The leakage pipe 15 is provided to connect the groups of liquid collecting pipes 16, so that the water collecting pipes 16 are installed at the top of the liquid collecting pipes 16. The head 17 and the sealing plate 18 can be used in a stably matched mounting plate 23 to complete the delivery of clean water, or to block the filtered liquid leakage hole 24 opened on the mounting plate 23 to prevent water from flowing out through the filtered liquid leakage hole 24, so that the water can only flow out through the central through hole 26 under pressure, thereby sending the impurities filtered out from the inside of the laminated filter group 28 to the inside, and closing the electric valve 11 on one side of the water inlet pipe 38 so that the water can only enter the waste liquid outlet pipe 39 and be sent out, thereby completing the collection of waste liquid.

[0045] Specifically, a group of force rods 19 are installed inside the several groups of second connecting plates 14 on the same side of the outer arc surface of each group of rotating seat 13, and a group of positioning shafts 20 are installed at the position of the force rods 19 corresponding to each group of second connecting plates 14. The filter box base 10 is rotatably installed inside the second connecting plate 14, and the two groups of force rods 19 are respectively installed at the position of the electric push rod 4 on each side. A group of push plates 21 are respectively installed. A slide groove 22 is opened inside the push plate 21. The force rod 19 and the push plate 21 are slidably connected. The push plate 21 is bolted to the telescopic end of the electric push rod 4. The second force rod 19 is installed on the outside of the rotating seat 13. The two connecting plates 14 are used to synchronize the two groups of force rods 19, and the force rods 19 are installed with positioning shafts 20 corresponding to each group of second connecting plates 14 so that the force rods 19 and each group of second connecting plates 14 can be stably coordinated for rotation. When the electric push rod 4 is forced to push the push plate 21 on one side, the use position of the force rod 19 is changed, thereby driving the rotation of the rotating seat 13. In addition, the sliding groove 22 opened inside the push plate 21 allows the force rod 19 to move as the rotating seat 13 rotates, which can avoid the position change of the force rod 19 during the rotation of the rotating seat 13.

[0046] In addition, a group of mounting plates 23 are snap-fitted and installed inside the filter box base 10. The mounting plates 23 are provided with a number of filter liquid leakage holes 24 that penetrate through the upper and lower parts with equal radian. At the positions corresponding to the filter liquid leakage holes 24 on the bottom of the mounting plate 23, limit bottom grooves 25 are provided. A central through hole 26 is penetrated through the center of the mounting plate 23. At the position corresponding to the central through hole 26 on the upper surface of the mounting plate 23, a sealing socket 27 is installed. The central through hole 26 opened in the center of the mounting plate 23 ensures that after the water body is input through the water inlet pipe 38, it enters the stacked disc filter assembly 28 through the filter box base 10, and the water body is filtered through the stacked disc filter assembly 28 into the inside of the sealing box cover 32. The opened filter liquid leakage holes 24 can cooperate with the water outlet head 17 to drain the filtered water body inside the sealing box cover 32 downward, and send it out through the liquid collecting pipe 16 and the liquid leakage pipe 15 to the filtered water drain pipe 1 to complete the treatment of the filtered water body. The limit bottom grooves 25 opened at the bottom of the mounting plate 23 limit the moving positions of the water outlet head 17 and the sealing plate 18, so that after the electric push rod 4 sets the stroke and pushes the rotating seat 13 to rotate, the water outlet head 17 and the sealing plate 18 can slide inside the corresponding limit bottom grooves 25. The sealing plate 18 is a rubber plate, and it plugs the filter liquid leakage holes 24 when the water outlet head 17 rotates. When backwashing is required, it plugs the filter liquid leakage holes 24, so that the water body can only be discharged through the central through hole 26, and then the water body is pressed out from inside the stacked disc filter assembly 28 by pressurization to ensure the stable delivery of the water body to the waste liquid outlet pipe 39 to complete the backwashing work.

[0047] Preferably, a sealing base 29 is installed at the bottom of the stacked disc filter assembly 28. A rubber insertion hole 30 is opened in the center of the sealing base 29. The sealing base 29 is fitted to the surface of the mounting plate 23, and the rubber insertion hole 30 is hermetically inserted and installed with the sealing socket 27. A positioning socket 31 is penetrated through the top of the stacked disc filter assembly 28. The sealing base 29 and the rubber insertion hole 30 at the bottom of the stacked disc filter assembly 28 cooperate with the sealing socket 27 at the center of the upper surface of the mounting plate 23, so as to better ensure the sealing performance of the connection between the stacked disc filter assembly 28 and the mounting plate 23, enabling the stacked disc filter assembly 28 to be quickly replaced and installed as a whole. At the same time, the sealing base 29 and the rubber insertion hole 30 installed at the top of the stacked disc filter assembly 28 limit the pressure monitoring structure, enabling the pressure monitoring structure to stably test the pressure inside the sealing box cover 32 and the pressure inside the stacked disc filter assembly 28.

[0048] Specifically, the pressure test structure includes a pressure display instrument 33 installed on the upper part of the sealing cover 32. The bottom of the pressure display instrument 33 extends into the interior of the sealing cover 32, and a group of first pressure measuring probes 34 and a group of second pressure measuring probes 35 are respectively installed at the detection end of the pressure display instrument 33. The first pressure measuring probe 34 is located inside the sealing cover 32. A plug 36 is installed on the outer arc surface of the second pressure measuring probe 35. The second pressure measuring probe 35 is inserted into the inside of the stacked filter group 28, and the plug 36 is hermetically inserted into the positioning socket 31. A pressure alarm instrument 37 is installed through the front side of the sealing cover 32. The pressure display instrument 33 is electrically connected to the pressure alarm instrument 37. The internal pressures of the sealing cover 32 and the stacked filter group 28 are respectively tested by the first pressure measuring probe 34 and the second pressure measuring probe 35. At the same time, the hardware requirements for the combined use of the pressurizing structure and the pressure monitoring structure include: the first pressure measuring probe 34 and the second pressure measuring probe 35 output 4-20 mA or 0-10 V signals, the pressure display instrument 33 has analog input, and the pressure alarm instrument 37 has analog input and relay output. The wiring steps include: connecting the output signals of the first pressure measuring probe 34 and the second pressure measuring probe 35 in parallel to the analog input ports of the pressure display instrument 33 and the pressure alarm instrument 37. If the driving capabilities of the first pressure measuring probe 34 and the second pressure measuring probe 35 are insufficient, a signal distributor such as Phoenix MINI MCR-2 needs to be installed. The relay output end of the pressure alarm instrument 37 is connected to the PLC control circuits of the electric push rod 4 and the electric valve 11. It is recommended to use a 24V DC regulated power supply for the independent power supply of the pressure display instrument 33 and the pressure alarm instrument 37. In addition, the refresh rate of the pressure display instrument 33 is 1 Hz. The high limit of the pressure alarm instrument 37 is 20 MPa for audible and visual alarm + shutdown, and the low limit is 5 MPa for only early warning. By comparing the pressure display instrument 33 with the pressure alarm instrument 37, the error needs to be ≤±1% FS. At the same time, signal interference protection is used: shielded twisted pair wires are used, the single-point grounding resistance <4 Ω, the distance between the analog signal wire and the power cable >30 cm, and vertical wiring is used when crossing. In addition, for pressure test calibration: a standard pressure calibration bench such as Fluke 719Pro is used to apply 0%, 50%, and 100% range pressures, and the zero point and full scale values of the pressure display instrument 33 and the pressure alarm instrument 37 are adjusted to ensure consistency with the standard values. The allowable deviation of the accuracy of the re-inspected alarm trigger point is ±0.5% FS.

[0049] It should be noted that the pressurizing structure includes an air compressor chamber 42 installed on one side of the filtered water drain pipe 1. A positioning frame 41 is provided at the bottom of the air compressor chamber 42. An air supply pipe 43 is connected and installed at the output end of the air compressor chamber 42. Electric control valves 44 are connected and installed corresponding to each group of water filtration structures on the air supply pipe 43. A one-way air valve 45 is connected and installed at the bottom of the electric control valve 44. A connecting pipe 46 is connected and installed at the bottom of the one-way air valve 45. The connecting pipe 46 is hermetically connected and installed to the sealing box cover 32. An air compressor is provided inside the air compressor chamber 42 provided in the pressurizing structure. The model of the air compressor is selected according to the specifications of the water filtration structure. Specifically, the model is selected according to the tank volume and the required pressure, such as 10m 3 When the tank body requires a pressure of 0.8 MPa, a screw air compressor can be selected, and the exhaust volume ≥ 2m 3 / min. Air is supplied into the air supply pipe 43 through the air compressor. The opening of the electric control valve 44 and the one-way air valve 45 allows the gas to be sent into the water filtration structure to ensure the change of the internal pressure of the water filtration structure, so that the water inside the water filtration structure is pressed out from the central through hole 26. Thus, the impurities filtered inside the laminated filter group 28 are sent into the filter box base 10 and then discharged into the waste liquid drain pipe 39 through a group of electric valves 11. Thread seal tape or thread sealant is used at the connection position to ensure that the joint is leak-free.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disc filter assembly with a backwashing mechanism, characterized in that: It includes a filtered water drain pipe (1), a water inlet pipe (38), a waste liquid outlet pipe (39), and several groups of water filtration structures installed on the upper part of the filtered water drain pipe (1); The filtered water drain pipe (1), the water inlet pipe (38), and the waste liquid outlet pipe (39) are respectively connected and installed to the water filtration structures; The water filtration structure includes a filter box base (10) located on the upper part of the filtered water drain pipe (1), a mounting plate (23) installed inside the filter box base (10), a liquid collecting pipe (16) rotatably installed at the lower part of the mounting plate (23), a stacked filter element group (28) inserted at the upper part of the mounting plate (23), and a sealed box cover (32) connected to the filter box base (10) in a sealed manner; A pressurizing structure is connected and installed at the top of the sealed box cover (32), and a pressure monitoring structure is installed inside the sealed box cover (32).

2. The disc filter assembly with a backwashing mechanism according to claim 1, characterized in that: A set of positioning seats (2) are respectively sleeved and installed at both ends of the filtered water drain pipe (1). A set of support frames (3) are respectively installed on the outer surfaces of the two sets of positioning seats (2). The installation positions of the two sets of support frames (3) are opposite, and a set of electric push rods (4) are respectively installed on the corresponding sides of the two sets of support frames (3). A set of docking seats (5) are respectively installed through the outer arc surface of the filtered water drain pipe (1) corresponding to each group of water filtration structures.

3. The disc filter assembly with a backwashing mechanism according to claim 2, characterized in that: A set of limiting structures are installed at the positions of the outer arc surface of the filtered water drain pipe (1) corresponding to each set of docking seats (5). The limiting structure includes two sets of arc-shaped positioning plates (6) symmetrically installed on the surface of the filtered water drain pipe (1). A set of support plates (7) are fixedly installed at the top of each set of arc-shaped positioning plates (6). A set of limiting sealing plates (8) are respectively installed on the corresponding sides of the two sets of support plates (7). A set of first connecting plates (9) for connection are respectively installed at both ends of the two sets of limiting sealing plates (8).

4. The disc filter assembly with a backwashing mechanism according to claim 3, characterized in that: A set of electric valves (11) are respectively installed on the outer arc surface of the filter box base (10) corresponding to the water inlet pipe (38) and the waste liquid outlet pipe (39). A shaft seal (12) is installed at the bottom of the filter box base (10). A rotating seat (13) is hermetically installed at the bottom of the shaft seal (12). Two sets of second connecting plates (14) are symmetrically installed on the outer arc surface of the rotating seat (13).

5. A disc filter assembly with a backwashing mechanism according to claim 4, characterized in that: A liquid leakage pipe (15) is fixedly installed at the center of the rotating seat (13). The bottom end of the liquid leakage pipe (15) is rotatably inserted into the inside of the docking seat (5). The top end of the liquid leakage pipe (15) extends into the inside of the filter box base (10) from inside the shaft seal (12). Several groups of liquid collecting pipes (16) are connected and installed at the top end of the liquid leakage pipe (15). A water outlet head (17) is opened at the top end of each group of liquid collecting pipes (16). A sealing plate (18) is fixedly installed on the outer arc surface of each group of liquid collecting pipes (16).

6. The disc filter assembly with a backwashing mechanism according to claim 5, characterized in that: A group of force rods (19) are installed inside several groups of second connecting plates (14) on the same side of the outer arc surface of each rotating seat (13). A positioning shaft (20) is installed at the position of the force rod (19) corresponding to each group of second connecting plates (14). The filter box base (10) is rotatably installed inside the second connecting plate (14). A push plate (21) is installed at the position of each side of the electric push rod (4) corresponding to the two groups of force rods (19). A chute (22) is opened inside the push plate (21). The force rod (19) is slidably connected with the push plate (21). The push plate (21) is bolted to the telescopic end of the electric push rod (4).

7. A disc filter assembly with a backwashing mechanism according to claim 6, characterized in that: A mounting plate (23) is snap-fitted inside the filter box base (10). A number of filter liquid leakage holes (24) are equiangularly opened through the mounting plate (23) up and down. A limiting bottom groove (25) is opened at the position corresponding to the opening position of the filter liquid leakage holes (24) at the bottom of the mounting plate (23). A central through hole (26) is opened through the center of the mounting plate (23). A sealing socket (27) is installed on the upper surface of the mounting plate (23) corresponding to the position of the central through hole (26).

8. A disc filter assembly with a backwashing mechanism according to claim 7, characterized in that: A sealing base (29) is installed at the bottom of the stacked filter element group (28). A rubber insertion hole (30) is opened at the center of the sealing base (29). The sealing base (29) is attached to the surface of the mounting plate (23). The rubber insertion hole (30) is sealed and inserted into the sealing socket (27). A positioning socket (31) is installed through the top end of the stacked filter element group (28).

9. A disc filter assembly with a backwashing mechanism according to claim 8, characterized in that: The pressure testing structure includes a pressure display instrument (33) installed on the upper part of the sealing box cover (32). The bottom of the pressure display instrument (33) extends into the sealing box cover (32). A first pressure measuring probe (34) and a second pressure measuring probe (35) are installed at the detection end of the pressure display instrument (33). The first pressure measuring probe (34) is located inside the sealing box cover (32). A plug (36) is installed on the outer arc surface of the second pressure measuring probe (35). The second pressure measuring probe (35) is inserted into the stacked filter element group (28). The plug (36) is sealed and inserted into the positioning socket (31). A pressure alarm instrument (37) is installed through the front side of the sealing box cover (32). The pressure display instrument (33) is electrically connected to the pressure alarm instrument (37).

10. The disc filter assembly with a backwashing mechanism according to claim 9, wherein: The pressurizing structure includes an air compressor chamber (42) installed on one side of the filtered water drain pipe (1). A positioning frame (41) is arranged at the bottom of the air compressor chamber (42). The output end of the air compressor chamber (42) is connected and installed with an air supply pipe (43). An electric control valve (44) is connected and installed on the air supply pipe (43) corresponding to each group of water filtering structures. A one-way air valve (45) is connected and installed at the bottom of the electric control valve (44). A connecting pipe (46) is connected and installed at the bottom of the one-way air valve (45). The connecting pipe (46) is sealed and connected to the sealing box cover (32).

Images