A disc stacked filter

Abstract

The present application discloses a disc stacked filter, comprising an upper end cover of a filter chamber, a filter chamber base, a filter chamber body, a feed port, a discharge port, a cleaning assembly, a hollow shaft, a plurality of filter units, and a plurality of holes. The cleaning assembly comprises a lifting tube, a rotary seal, a lifting structure, a plurality of drainage holes, a plurality of drainage grooves, a connecting sleeve, a drainage structure, a spring, a drainage pipe fitting, a plurality of drainage holes, a plurality of normally through holes, and a spiral scraper. In daily use, by adopting the above technical scheme, the connecting sleeve is connected to the external water supply equipment, and the lifting structure is operated to make the lifting tube extend into the inner cavity of the hollow shaft, and water flows from each normally through hole to the peripheral wall of the hollow shaft, and the spiral scraper scrapes off the material on the peripheral wall of the hollow shaft. When the top of the lifting tube contacts the top of the filter assembly, the drainage pipe fitting is retracted into the lifting tube, and each drainage hole is connected to each drainage hole. The rotating seal drives the lifting tube to rotate back and forth, and each drainage groove and each drainage hole is intermittently aligned with the hole, and the sewage is discharged from the drainage structure.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering equipment, and in particular to a disc stacked filter. Background Art

[0002] In the design of filtration equipment for high-temperature, high-pressure, and high-viscosity materials (such as plastics), backwashing filtration devices are gaining popularity among companies to improve the service life and operating efficiency of filtration equipment. A backwashing filtration device is a device that, when the amount of filter material pollutants intercepted on the filter reaches a certain level, removes the intercepted pollutants through reverse flushing, allowing the pollutants to be discharged from the sewage outlet. High-precision filtration devices require that the sewage equipment does not leak pollutants during the sewage discharge process. At the same time, all materials to be filtered must enter the filter assembly for filtration, and the filtered materials will not be subject to secondary contamination. Therefore, high-precision filtration equipment has very high requirements for the sealing performance of the filter chamber and the sewage valve body.

[0003] Currently, on the market, there is a fully automatic backwash filter with publication number CN110639258A. The internal drain valve stem is extended into the filter core shaft, passing through each layer of filter screen in sequence, and each layer of filter screen is flushed in turn. The sewage is discharged from the drain outlet. This technical solution has the following defects:

[0004] 1. The top peripheral wall of the internal sewage valve stem fits tightly with the inner peripheral wall of the filter core shaft. When it rises in the filter core shaft, the material on the inner wall of the filter core shaft will be pushed to the top of the filter core shaft, and it cannot be discharged from the sewage outlet along with the cleaning sewage, and cannot be fully cleaned.

[0005] 2. The top of the internal sewage valve stem needs to pass through each layer of filter screen and be flushed in sequence. It is impossible to clean each layer of filter screen at the same time, and the cleaning efficiency is low. Summary of the Invention

[0006] The present invention aims to solve one of the technical problems existing in the prior art.

[0007] The present application provides a disc stacked filter, comprising an upper end cover of a filter chamber, a filter chamber base, a filter chamber body, a feed port, a discharge port, a filter assembly and a cleaning assembly, the filter assembly comprising a hollow shaft and a plurality of filter units, the hollow shaft being provided with a plurality of holes communicating with the filter units, the cleaning assembly comprising a lifting tube, which is mounted on the bottom of the filter chamber base via an actively rotatable rotary seal and can be extended into the hollow shaft by control of a lifting structure, a plurality of drainage holes and a plurality of drainage grooves are provided on the peripheral wall of the lifting tube, a connecting sleeve is installed at the lower end, each drainage groove is communicated with the inner cavity of the rotary seal, the rotary seal is sealed with each drainage groove and the peripheral wall of the lifting tube and is provided with a drainage structure, a drainage pipe fitting is installed in the inner cavity of the lifting tube by floating means of a spring, a plurality of drainage holes are provided on the peripheral wall of the drainage pipe fitting, a plurality of regular through holes are provided at the top, and a spiral scraper is provided at the top of the lifting tube;

[0008] When the top of the lifting tube extends into the top of the inner cavity of the hollow shaft, the top of the drainage pipe sinks to be flush with the top of the lifting tube, and the drainage holes and the drainage holes are connected with the holes.

[0009] The rotary seal includes a rotating sleeve, which is sleeved on the outside of the hollow shaft, and the bottom is slidably sealed with the outer peripheral wall of the hollow shaft and each drainage groove through a sealing structure. The outer side of the rotating sleeve is sleeved with a fixed shell fixed to the bottom of the filter chamber base, and an actuating structure for controlling the rotation of the rotating sleeve is provided in the fixed shell, and the drainage structure is installed on the rotating sleeve.

[0010] The sealing structure includes a fixed ring fixed on the bottom of the rotating sleeve, a disassembly shell fixed on the fixed ring, a sealing ring groove is formed between the inner side of the disassembly shell and the fixed ring, a sealing ring is provided in the sealing ring groove, and a pressurizing unit is provided between the outer ring of the sealing ring and the outer ring of the sealing ring groove, and the pressurizing unit is used to apply pressure to the outer ring of the sealing ring.

[0011] The pressurizing unit includes a ring body, the inner ring of which is provided with a plurality of elastic plates inclined toward the axis of the sealing ring, the lower end of the elastic plate is provided with a pressure flange inclined away from the axis of the sealing ring, and the outer side of the bottom of the sealing ring groove is provided with a beveled edge abutting against each pressure flange.

[0012] The drainage structure includes a drainage ring groove arranged on the outer peripheral wall of the rotating sleeve and connected to the inner cavity of the rotating sleeve through a plurality of drainage holes. A drainage ring shell is rotatably installed in the drainage ring groove. The inner cavity of the drainage ring shell is hollow and connected to various drainage ports, and a drainage pipe is connected on the outer wall.

[0013] The actuating structure includes a connecting piece fixed on the peripheral wall of the rotating sleeve and having a waist-shaped groove, a cylinder fixed on the outer wall of the fixed shell, the piston rod of the cylinder penetrates into the inner cavity of the fixed shell, and is fixed with a U-shaped frame, and the U-shaped frame is fixed with a connecting rod that slides through the waist-shaped groove.

[0014] A top annular groove connected to each drainage groove is provided on the circumferential side of the top of the hollow shaft rod. A connecting ring is fixed on the top of the top annular groove. The diameter of the connecting ring is smaller than the outer diameter of the hollow shaft rod. There are several spiral scrapers, which are suspended and fixed between the lower end wall of the top annular groove and the lower end wall of the connecting ring. Each spiral scraper extends spirally along the axis of the hollow shaft rod, and has a blade on the outside, which extends out of the top annular groove.

[0015] The top of the connecting ring is provided with a plurality of radially distributed drainage grooves, the number of which is half of the normal through holes. When the top of the drainage pipe is flush with the lifting pipe, each drainage groove is connected with part of the normal through holes.

[0016] The drainage pipe fitting includes a floating tube body, which is floated and inserted in the inner cavity of the hollow shaft rod, with a circular plate fixed on the top. The regular through holes are radially arranged on the peripheral wall of the circular plate, and the inner end is connected to the inner cavity of the hollow shaft rod. A floating cavity that slides with the circular plate is provided at the top of the inner cavity of the hollow shaft rod, and a spring is provided between the bottom of the circular plate and the bottom of the floating cavity. The drainage holes are provided on the peripheral wall of the floating tube body.

[0017] The lifting control structure includes a vertical shell fixed on the base of the filter chamber, the vertical shell is normally open toward one side of the hollow shaft, and a screw driven by a motor is provided inside. A lifting plate is installed on the screw through thread transmission. A fixed sleeve is fixed to the lower end of the lifting tube by a bolt, and a notch is provided on one side of the fixed sleeve, and the center of the bottom end is hollowed out. The other end of the lifting plate passes through the notch and is rotatably installed in the fixed sleeve. The connecting sleeve is rotatably installed at the bottom of the inner cavity of the hollow shaft, the lower end extends out of the fixed sleeve, and the middle part is fixed to the lifting plate away from the screw end.

[0018] The beneficial effects of the present invention are as follows:

[0019] Compared with the prior art, when the lifting pipe of the present application rises, water flows from each regular through hole to the inner wall of the hollow shaft, and cooperates with the spiral scraper to scrape the material on the inner wall of the hollow shaft, enters the rotating seal through each drainage groove, and is finally discharged through the drainage structure, ensuring that the inner circumference of the filter shaft is fully cleaned;

[0020] When the lifting tube rises to the highest position, the top end abuts against the top of the filter assembly, and the drainage pipe is pressed into the inner cavity of the lifting tube. Each drainage hole corresponds to each drainage hole and also corresponds to each hole on the hollow shaft. Water flows into the filter unit to flush the filter screen in the filter unit. Then the rotary seal rotates to control the rotation of the lifting tube so that each drainage groove is aligned with each hole. Each drainage hole and each drainage hole are misaligned with the corresponding holes. The sewage in each filter assembly enters the drainage structure through each drainage groove and is discharged from the drainage structure. The lifting tube is rotated repeatedly so that the filter screen in each filter unit can be repeatedly flushed at the same time, thereby improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional view of a disc stacked filter in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 3 This is a three-dimensional diagram of the hollow shaft, each filter unit and the cleaning assembly in the embodiment of the present application;

[0024] Figure 4 This is a three-dimensional diagram of the cleaning component in the embodiment of the present application;

[0025] Figure 5 This is a three-dimensional diagram of the cleaning component in the embodiment of the present application;

[0026] Figure 6 This is a three-dimensional diagram of the lifting tube in the embodiment of this application.

[0027] Reference numerals

[0028] 1-upper end cover, 2-filter chamber base, 3-filter chamber body, 4-feed port, 5-discharge port, 6-filter assembly, 7-cleaning assembly, 71-lifting tube, 72-rotating seal, 721-rotating sleeve, 722-fixed shell, 73-lifting structure, 731-vertical shell, 732-motor, 733-screw, 734-lifting plate, 735-fixed sleeve, 736-notch, 74-drainage hole, 75-drainage groove, 76-connecting pipe sleeve, 77-drainage structure, 771-drainage port, 772-drainage ring groove, 773-drainage ring shell, 77 4-drainage pipe, 78-drainage pipe fitting, 781-floating pipe body, 782-circular plate, 783-floating chamber, 79-drainage hole, 710-normal through hole, 711-spiral scraper, 8-sealing structure, 81-fixing ring, 82-disassembly shell, 83-sealing ring groove, 84-sealing ring, 85-ring body, 86-elastic plate, 87-pressure flange, 9-actuating structure, 91-waist groove, 92-connecting plate, 93-cylinder, 931-piston rod, 94-U-shaped frame, 95-connecting rod, 10-top ring groove, 11-connecting ring, 12-drainage groove. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0030] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0031] The disc stacked filter provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0032] Example 1:

[0033] like Figures 1 to 6 As shown, the embodiment of the present application provides a disc stacked filter, including a filter chamber upper end cover 1, a filter chamber base 2, a filter chamber body 3, a feed port 4, a discharge port 5, a filter assembly 6 and a cleaning assembly 7. The filter assembly 6 includes a hollow shaft 61 and a plurality of filter units 62. The hollow shaft 61 is provided with a plurality of holes 63 for connecting the filter units 62. The cleaning assembly 7 includes a lifting pipe 71, which is installed at the bottom of the filter chamber base 2 through an actively rotatable rotary seal 72, and is controlled by a lifting structure 73 to extend into the hollow shaft. Inside the rod 61, the circumferential wall of the lifting tube 71 is provided with a plurality of drainage holes 74 and a plurality of drainage grooves 75. A connecting pipe sleeve 76 is installed at the lower end. Each drainage groove 75 is connected to the inner cavity of the rotary seal 72. The rotary seal 72 is sealed with each drainage groove 75 and the circumferential wall of the lifting tube 71 and is provided with a drainage structure 77. A drainage pipe 78 is installed in the inner cavity of the lifting tube 71 by a spring. The circumferential wall of the drainage pipe 78 is provided with a plurality of drainage holes 79 and a plurality of regular through holes 710 at the top. A spiral scraper 711 is provided at the top of the lifting tube 71.

[0034] When the top of the lifting tube 71 extends into the top of the inner cavity of the hollow shaft 61 , the top of the drainage tube 78 sinks to be flush with the top of the lifting tube 71 , and the drainage holes 79 and the drainage holes 74 are connected to the holes 63 .

[0035] In this embodiment of the present application, due to the adoption of the above-mentioned structure, each filter unit 62 (which has been fully disclosed in the prior art and is therefore not shown in detail in the drawings of the specification) includes an outer guide plate, an inner guide plate and a filter screen, a plurality of outer guide grooves are provided on the outer guide plate, and outer guide holes connected to the outer ends of the outer guide grooves are provided on the outer guide plate, a plurality of inner guide grooves are provided on the inner guide plate, and inner guide holes connected to the inner guide grooves are provided on the inner guide plate, and these inner guide holes are respectively connected to the holes 63 provided on the hollow shaft 61, a pressure plate is fixed on the top of the hollow shaft 61, and a groove connected to the inner cavity of the hollow shaft 61 is provided at the bottom of the pressure plate, and a connecting pipe sleeve 76 is connected to the external water supply equipment. When the cleaning operation is performed, the external water supply equipment is connected to the lifting pipe 7 through the connecting pipe sleeve 76. 1 is supplied with water. At this time, under the action of the spring, the top of the drainage pipe 78 extends out of the lifting pipe 71. The drainage holes 79 on the drainage pipe 78 are misaligned with the drainage holes 74 on the lifting pipe 71. The water flows out from the regular through holes 710 on the top of the lifting pipe 71. The lifting structure 73 controls the lifting pipe 71 to extend into the hollow shaft 61. The water flows from the regular through holes 710 to the inner circumference of the hollow shaft 61. At the same time, the spiral scraper 711 rises to scrape off the raw materials attached to the inner circumference of the hollow shaft 61. The sewage carries the raw materials through the drainage grooves 75 into the sealing structure 8 and is then discharged through the drainage structure 77. When the lifting pipe 71 extends into the groove at the bottom of the pressure plate, the top of the drainage pipe 78 first contacts the top surface of the groove. The lifting pipe 71 continues to rise, so that the drainage pipe 78 is pressed into the inner cavity of the lifting tube 71, and the spring is compressed to store elastic potential energy until the top of the lifting tube 71 also contacts the top surface of the groove. At this time, the top surface of the drainage pipe 78 is flush with the top surface of the lifting tube 71, and the drainage holes 79 on the drainage pipe 78 are connected with the inner ends of the drainage holes 74 set on the peripheral wall of the lifting tube 71, and the drainage holes 74 are connected with the holes 63 set on the hollow shaft 61. The water flows through the inner cavity of the drainage pipe 78, through the drainage holes 79, the drainage holes 74, the holes 63 and the inner guide holes, and then enters the inner guide grooves, while flushing the filter screens. Then the rotary seal 72 is actuated to control the rotation of the lifting tube 71 so that the drainage grooves 75 correspond to the holes 63 on the hollow shaft 61, and the sewage in the inner guide grooves is discharged. The water flows through the corresponding inner guide holes and the corresponding holes 63 into each drainage groove 75, then flows from the drainage groove 75 to the rotary seal 72, and is finally discharged through the drainage structure 77. The rotary seal 72 can be controlled to rotate intermittently and repeatedly, so that each filter screen undergoes multiple flushing and sewage discharges. After the cleaning of each filter screen is completed, the lifting structure 73 is started to control the lifting pipe 71 to descend, and the spring releases the elastic potential energy to push the drainage pipe 78 out of the lifting pipe 71. The permanent holes 710 extend out of the lifting pipe 71, and the drainage holes 79 are staggered with the drainage holes 74. During the descending process of the lifting pipe 71, the water flow in the drainage pipe 78 can only rush to the inner peripheral wall of the hollow shaft 61 from the permanent holes 710. During the descending process of the lifting pipe 71, the inner peripheral wall of the hollow shaft 61 is flushed again.It also ensures that during the descent of the lifting pipe 71, no water will be ejected from the drainage hole 74 that has moved outside the rotary seal 72, thus avoiding the waste of water resources.

[0036] After the lifting tube 71 is separated from the hollow shaft 61, it will continue to descend and retract into the preset hole on the filter chamber base 2. At this time, the feed port 4 is connected with the hollow shaft 61, and a sealing structure is provided on the filter chamber base 2 through the side groove (in actual implementation, it is a plug plate, which is manually pulled and can also be controlled by a cylinder, electric cylinder or screw), which is used to seal the upper end of the hole when the upper end of the lifting tube 71 is retracted into the hole to prevent the raw material from entering the cleaning structure. When the lifting tube 71 needs to be raised, the sealing structure is controlled to detach from the hole in advance.

[0037] Example 2:

[0038] like Figure 2 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the rotary seal 72 includes a rotating sleeve 721, which is sleeved on the outside of the hollow shaft 61, and the bottom is slidably sealed with the outer peripheral wall of the hollow shaft 61 and each drainage groove 75 through a sealing structure 8. The outer side of the rotating sleeve 721 is sleeved with a fixed shell 722 fixed to the bottom of the filter chamber base 2, and the fixed shell 722 is provided with an actuating structure 9 for controlling the rotation of the rotating sleeve 721, and the drainage structure 77 is installed on the rotating sleeve 721.

[0039] Furthermore, the sealing structure 8 includes a fixed ring 81 fixed to the bottom of the rotating sleeve 721, a disassembly shell 82 fixed on the fixed ring 81, a sealing ring groove 83 is formed between the inner side of the disassembly shell 82 and the fixed ring 81, a sealing ring 84 is provided in the sealing ring groove 83, and a pressurizing unit is provided between the outer ring of the sealing ring 84 and the outer ring of the sealing ring groove 83, and the pressurizing unit is used to apply pressure to the outer ring of the sealing ring 84.

[0040] Furthermore, the pressurizing unit includes a ring body 85, the inner ring of the ring body 85 is provided with several elastic plates 86 inclined toward the axis of the sealing ring 84, the lower end of the elastic plate 86 is provided with a pressure flange 87 inclined away from the axis of the sealing ring 84, and the outer side of the bottom of the sealing ring groove 83 is provided with a bevel edge abutting against each pressure flange 87.

[0041] In this embodiment of the present application, due to the adoption of the above-mentioned structure, during the lifting process of the lifting tube 71, its outer peripheral wall and each drainage groove 75 are tightly fitted with the inner peripheral wall of the sealing ring 84. The inner peripheral wall of the sealing ring 84 is adapted to the outer peripheral wall of the lifting tube 71 provided with a plurality of drainage grooves 75. The disassembly shell 82 and the fixing ring 81 are fixedly connected by a flange and a plurality of bolts. When the installation is completed, the beveled edge located in the sealing ring groove 83 can pressurize the pressure flange 87, pushing each elastic plate 86 to deform toward the axial direction of the sealing ring 84, thereby pressing the sealing ring. The outer side of 84 applies inward pressure to ensure the sealing between the inner peripheral wall of the sealing ring 84 and the outer peripheral wall of the lifting pipe 71. The thickness of the sealing ring 84 is greater than the distance between the longitudinally adjacent drainage holes 74, and is also greater than the diameter of the drainage holes 74, to ensure that the inner circle of the sealing ring 84 can maintain a seal with the outer peripheral wall of the lifting pipe 71 and each drainage groove 75 at any time. The sewage enters the rotating sleeve 721 from each drainage groove 75 and is then discharged through the drainage structure 77. The top of the sealing sleeve and the ground of the filter chamber base 2 are dynamically sealed by the sealing ring.

[0042] Example 3:

[0043] like Figures 1 to 4 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the drainage structure 77 includes a drainage ring groove 772 provided on the outer peripheral wall of the rotating sleeve 721 and connected to the inner cavity of the rotating sleeve 721 through a plurality of drainage ports 771. A drainage ring shell 773 is rotatably installed in the drainage ring groove 772. The inner cavity of the drainage ring shell 773 is hollow and connected to each drainage port 771, and a drainage pipe 774 is connected on the outer wall.

[0044] In this embodiment of the present application, due to the adoption of the above-mentioned structure, sewage enters the rotating sleeve 721, then enters the inner cavity of the drainage ring shell 773 through each drainage port 771, and is then discharged centrally through the drainage pipe 774. A water pump can be installed at the outer end of the drainage pipe 774 to generate negative pressure in the drainage pipe 774, thereby improving the discharge efficiency of sewage.

[0045] Example 4:

[0046] like Figures 3 to 5 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the actuating structure 9 includes a connecting plate 92 fixed on the peripheral wall of the rotating sleeve 721 and having a waist-shaped groove 91, a cylinder 93 fixed on the outer wall of the fixed shell 722, a piston rod 931 of the cylinder 93 penetrates into the inner cavity of the fixed shell 722, and is fixed with a U-shaped frame 94, and a connecting rod 95 slidably penetrated in the waist-shaped groove 91 is fixed in the U-shaped frame 94.

[0047] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when it is necessary to control the lifting tube 71 to rotate about its own axis, the cylinder 93 is actuated to extend / contract the piston rod 931, and the U-shaped frame 94 at the outer end of the piston rod 931 moves away from / closer to the cylinder 93, and the connecting rod 95 slides toward the other end of the waist-shaped groove 91, pushing / pulling the connecting plate 92 to drive the rotating sleeve 721 to rotate clockwise / counterclockwise about the axis of the lifting tube 71. The fixing ring 81 at the bottom of the rotating sleeve 721 and the inner ring of the disassembly shell 82 are both adapted to the shape of the surrounding wall of the lifting tube 71 with a plurality of drainage grooves 75, thereby simultaneously driving the lifting tube 71 to rotate clockwise / counterclockwise about its own axis.

[0048] Example 5:

[0049] like Figure 6 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, a top annular groove 10 connected to each drainage groove 75 is provided on the top circumferential side of the hollow shaft 61, and a connecting ring 11 is fixed on the top of the top annular groove 10. The diameter of the connecting ring 11 is smaller than the outer diameter of the hollow shaft 61. There are several spiral scrapers 711, which are suspended and fixed between the lower end wall of the top annular groove 10 and the lower end wall of the connecting ring 11. Each spiral scraper 711 extends spirally along the axis of the hollow shaft 61, and has a blade on the outside, which extends out of the top annular groove 10.

[0050] Furthermore, a plurality of radially distributed drainage grooves 12 are provided on the top of the connecting ring 11 , and the number of the drainage grooves 12 is half of the normal through holes 710 . When the top of the drainage pipe 78 is flush with the lifting pipe 71 , each drainage groove 12 is connected to part of the normal through holes 710 .

[0051] In this embodiment of the present application, due to the adoption of the above-mentioned structure, the spiral structure enables the spiral scraper 711 to continuously scrape the material on the inner wall of the hollow shaft 61 during the rotation process, without the need to repeat the action frequently like a linear scraper. The setting of several spiral scrapers can completely cover the inner wall of the hollow shaft 61, ensuring sufficient cleaning effect of the material on the inner wall of the hollow shaft 61, and when the top of the lifting tube 71 abuts the top of the groove, although the top of the floating tube body 781 is flush with the top of the lifting tube 71, part of the normal through hole 710 is blocked, but part of the normal through hole 710 is still connected to each drainage groove 12, ensuring that water can enter from the gap between the connecting ring 11 and the peripheral wall of the groove and flow through the top annular groove 10, flushing these spiral cutters, achieving a self-cleaning effect, and the sewage in the top annular groove 10 enters each drainage groove 75 and is discharged uniformly through the drainage structure 77.

[0052] Example 6:

[0053] like Figure 2 and Figure 6As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the drainage pipe 78 includes a floating tube body 781, which is floated and inserted in the inner cavity of the hollow shaft 61, with a circular plate 782 fixed on the top. The regular through holes 710 are radially arranged on the peripheral wall of the circular plate 782, and the inner end is connected to the inner cavity of the hollow shaft 61. A floating cavity 783 that slides with the circular plate 782 is provided at the top of the inner cavity of the hollow shaft 61. A spring is provided between the bottom of the circular plate 782 and the bottom of the floating cavity 783, and the drainage holes 79 are provided on the peripheral wall of the floating tube body 781.

[0054] In this embodiment of the present application, due to the adoption of the above-mentioned structure, the top surface of the circular plate 782 abuts against the top of the groove, and when the lifting tube 71 continues to rise, the circular plate 782 and the floating tube body 781 descend relative to the lifting tube 71, and the spring is compressed and shortened until each circular plate 782 descends into the floating cavity 783, and the drainage holes 79 located on the peripheral wall of the floating tube body 781 are connected with the drainage holes 74 provided on the body of the lifting tube 71. Conversely, when the lifting tube 71 descends, the spring releases its elastic potential energy, pushing the circular plate 782 and the floating tube body 781 to rise, and the drainage holes 79 are misaligned with the drainage holes 74.

[0055] Example 7:

[0056] like Figures 3 to 6 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, the lifting structure 73 includes a vertical shell 731 fixedly mounted on the filter chamber base 2, the vertical shell 731 is normally open toward the side of the hollow shaft 61, and a screw 733 driven by a motor 732 is provided inside, and a lifting plate 734 is installed on the screw 733 through threaded transmission, and a fixing sleeve 735 is fixed to the lower end of the lifting tube 71 by bolts, a notch 736 is provided on one side of the fixing sleeve 735, and the center of the bottom end is hollowed out, the other end of the lifting plate 734 passes through the notch 736 and is rotatably mounted in the fixing sleeve 735, the connecting pipe sleeve 76 is rotatably mounted at the bottom of the inner cavity of the hollow shaft 61, the lower end extends out of the fixing sleeve 735, and the middle part is fixed to the lifting plate 734 away from the screw 733 end.

[0057] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the lifting tube 71 needs to be raised or lowered, the motor 732 runs, driving the screw 733 to rotate, and the lifting plate 734 connected to the screw 733 by a thread is lifted or lowered along the axis of the screw 733, driving the lifting tube 71 to rise or fall. There is a movable space between the notch 736 and the lifting plate 734. When the lifting tube 71 swings back and forth under the control of the actuating structure 9, the notch 736 swings back and forth relative to the lifting plate 734 along the axis of the lifting tube 71, and will not collide with the lifting plate 734.

[0058] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0059] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A disc stacked filter, comprising a filter chamber upper end cover, a filter chamber base, a filter chamber body, a feed inlet, a discharge port, a filter assembly, and a cleaning assembly. The filter assembly comprises a hollow shaft and a plurality of filter units. The hollow shaft is provided with a plurality of holes connecting the filter units. The filter assembly is characterized in that: The cleaning assembly includes a lifting tube, which is installed at the bottom of the filter chamber base through an actively rotatable rotary seal and can be extended into the hollow shaft by the control of the lifting structure. The lifting tube is provided with a plurality of drainage holes and a plurality of drainage grooves on the peripheral wall, and a connecting sleeve is installed at the lower end. Each drainage groove is connected to the inner cavity of the rotary seal. The rotary seal is sealed with each drainage groove and the peripheral wall of the lifting tube and is provided with a drainage structure. A drainage pipe is installed in the inner cavity of the lifting tube by a spring. The drainage pipe is provided with a plurality of drainage holes on the peripheral wall and a plurality of permanent holes at the top. A spiral scraper is provided at the top of the lifting tube. When the top of the lifting tube extends into the top of the inner cavity of the hollow shaft, the top of the drainage pipe sinks to be flush with the top of the lifting tube, and each drainage hole and each drainage hole is connected with each hole; The rotary seal comprises a rotary sleeve, which is sleeved on the outside of the hollow shaft, and the bottom of which is slidably sealed with the outer peripheral wall of the hollow shaft and each drainage groove through a sealing structure. The outer side of the rotary sleeve is sleeved with a fixed shell fixed to the bottom of the filter chamber base, and the fixed shell is provided with an actuating structure for controlling the rotation of the rotary sleeve. The drainage structure is installed on the rotary sleeve; The sealing structure includes a fixed ring fixed to the bottom of the rotating sleeve, a disassembly shell fixed to the fixed ring, a sealing ring groove formed between the inner side of the disassembly shell and the fixed ring, a sealing ring arranged in the sealing ring groove, and a pressurizing unit arranged between the outer ring of the sealing ring and the outer ring of the sealing ring groove, the pressurizing unit being used to apply pressure to the outer ring of the sealing ring; The pressurizing unit includes a ring body, the inner ring body is provided with a plurality of elastic plates inclined toward the axis of the sealing ring, the lower ends of the elastic plates are provided with pressure flanges inclined away from the axis of the sealing ring, and the outer side of the bottom of the sealing ring groove is provided with oblique edges abutting against the pressure flanges; The drainage structure includes a drainage ring groove provided on the outer peripheral wall of the rotating sleeve and connected to the inner cavity of the rotating sleeve through a plurality of drainage holes. A drainage ring shell is rotatably installed in the drainage ring groove. The inner cavity of the drainage ring shell is hollow and connected to the drainage ports. A drainage pipe is connected on the outer wall. The actuating structure includes a connecting piece fixed on the peripheral wall of the rotating sleeve and having a waist-shaped groove, a cylinder fixed on the outer wall of the fixed shell, a piston rod of the cylinder penetrating into the inner cavity of the fixed shell, a U-shaped frame fixed thereto, and a connecting rod fixed in the U-shaped frame that slides through the waist-shaped groove; A top annular groove connected to each drainage groove is provided on the circumferential side of the top of the hollow shaft rod. A connecting ring is fixed on the top of the top annular groove. The diameter of the connecting ring is smaller than the outer diameter of the hollow shaft rod. There are several spiral scrapers, which are suspended and fixed between the lower end wall of the top annular groove and the lower end wall of the connecting ring. Each spiral scraper extends spirally along the axis of the hollow shaft rod, and has a blade on the outside, which extends out of the top annular groove.

2. A disc stack filter according to claim 1, characterized in that: The top of the connecting ring is provided with a plurality of radially distributed drainage grooves, the number of which is half of the normal through holes. When the top of the drainage pipe is flush with the lifting pipe, each drainage groove is connected with part of the normal through holes.

3. The disc stack filter according to claim 1, characterized in that: The drainage pipe fitting includes a floating tube body, which is floated and inserted in the inner cavity of the hollow shaft rod, with a circular plate fixed on the top. The regular through holes are radially arranged on the peripheral wall of the circular plate, and the inner end is connected to the inner cavity of the hollow shaft rod. A floating cavity that slides with the circular plate is provided at the top of the inner cavity of the hollow shaft rod, and a spring is provided between the bottom of the circular plate and the bottom of the floating cavity. The drainage holes are provided on the peripheral wall of the floating tube body.

4. The disc stack filter according to claim 1, characterized in that: The lifting structure includes a vertical shell fixed on the base of the filter chamber, the vertical shell is normally open toward one side of the hollow shaft, and a screw driven by a motor is provided inside. A lifting plate is installed on the screw through thread transmission. A fixed sleeve is fixed to the lower end of the lifting tube by a bolt, and a notch is provided on one side of the fixed sleeve, and the center of the bottom end is hollowed out. The other end of the lifting plate passes through the notch and is rotatably installed in the fixed sleeve. The connecting sleeve is rotatably installed at the bottom of the inner cavity of the hollow shaft, the lower end extends out of the fixed sleeve, and the middle part is fixed to the lifting plate away from the screw end.

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