A tap water treatment equipment with multiple filter membrane structures

Abstract

The present invention belongs to the technical field of tap water treatment, and in particular relates to a tap water treatment device with a multiple filter membrane structure, comprising a filter tank, a water collecting pipe installed inside the filter tank, and several filter discs vertically installed on the water collecting pipe and used for filtering tap water, the filter tank is connected with an inlet pipe and an outlet pipe, and the filter tank is provided with a power unit for driving the filter disc to rotate; several groups of scraping and backwashing components are provided in the filter tank; each group of scraping and backwashing components comprises a dirt collecting box placed on both sides of the filter disc and a support rod for connecting the dirt collecting box with an automatic variable pitch component, the dirt collecting box is obliquely installed with an extendable / pressable scraper near the box wall of the filter disc, and the bottom of the dirt collecting box is connected with a dirt suction hose connected to the backwash pump assembly; the present invention not only realizes the scraping of sludge accumulated on the surface of the filter disc first, and then backwashing the sludge clogged in the mesh, but also can effectively reduce the phenomenon that a large amount of tap water in the filter tank is discharged simultaneously when the scraped sludge is discharged.

Description

Technical Field

[0001] The invention belongs to the technical field of tap water treatment, and in particular relates to a tap water treatment device with a multiple filter membrane structure. Background Art

[0002] When purifying tap water, water plants need to use filtration equipment to filter the tap water after flocculation and sedimentation. However, most existing filtration equipment uses a rotary filter cloth filter to physically filter the tap water, effectively intercepting suspended solids (SS), flocs and impurities.

[0003] When the existing rotary cloth filter tank is in use, it is necessary to regularly backwash the sludge blocked in the filter cloth mesh on the filter disc through the existing backwashing device, and the sludge layer accumulated on the surface of the filter disc is directly scraped into the filter tank through the backwashing device, and then the scraped sludge is collected and discharged through the collection pipe at the bottom of the filter tank and the sludge pump.

[0004] However, although the existing backwashing device can achieve the backwashing effect on the filter cloth on the filter disc, the sludge layer accumulated on the surface of the filter disc is directly scraped off and dropped into the filter tank, and the filter disc rotates in the filter tank. Therefore, the scraped sludge layer will be scattered or disorderly in the filter tank. However, the backwashing cleaning of the filter disc is carried out in the rotary filter cloth filter without stopping the machine. Therefore, not only will the collection pipe at the bottom of the filter tank discharge a large amount of tap water to be filtered in the filter tank before the scraped sludge layer can be collected and discharged, but the scattered sludge will also be easily adsorbed onto the surface of the filter disc again, which will not only cause unnecessary waste of tap water, but also require the discharged tap water to be transported to the filter tank for filtering treatment for a second time, which will cause energy waste and reduce the filtering treatment efficiency of tap water. Summary of the Invention

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a tap water treatment equipment with a multiple filter membrane structure, comprising a filter tank, a water collection pipe installed inside the filter tank, and a plurality of filter discs vertically installed on the water collection pipe and used for filtering tap water, the filter tank being connected with an inlet pipe and an outlet pipe, and the filter tank being provided with a power unit for driving the filter disc to rotate; a plurality of groups of scraping backwashing components are provided in the filter tank, and a plurality of groups of the scraping backwashing components are connected with automatic variable distance components installed near the side wall of the filter tank; each group of the scraping backwashing components comprises a dirt collecting box placed on both sides of the filter disc and a support rod for connecting the dirt collecting box with the automatic variable distance component, the dirt collecting box is obliquely provided with a scraper that can be extended / pressed back at the box wall near the filter disc, and the bottom of the dirt collecting box is connected with a dirt suction hose connected with the backwash pump assembly.

[0007] As a preferred solution of the present invention, the dirt collecting box is provided with a push guide component for providing thrust for the scraper, and the push guide component includes a guide slider and a first elastic element; the width dimension of the scraper is smaller than the internal width dimension of the dirt collecting box, and the end face of the scraper that is in contact with the filter disc is parallel to the outer surface of the filter disc; the box wall of the dirt collecting box close to the filter disc is provided with a recessed notch from top to bottom to support the scraper; the side wall of the dirt collecting box that contacts the scraper is inclined to provide a guide inclined groove for facilitating the sliding of the guide slider, and the guide slider is connected to the scraper; a first elastic element for providing force to the scraper is connected between the guide slider and the groove wall of the guide inclined groove.

[0008] As a preferred solution of the present invention, a protective cover with a top seal and side openings is provided at the upper opening of the dirt collecting box, and a dirt inlet channel corresponding to the inclined scraper is formed on the box wall of the protective cover close to the filter disc.

[0009] As a preferred solution of the present invention, a protective cover is installed at the upper box opening of the dirt collecting box, and a movable protective component is installed at the box opening of the protective cover close to the filter plate. The movable protective component is connected to the scraper. When the scraper is extended / pressed back into the collection box, the movable protective component moves synchronously with the scraper.

[0010] As a preferred solution of the present invention, the movable protective assembly includes two side uprights slidably placed at the box opening of the protective cover near the surface of the filter disc and a top plate located on the top surface of the two side uprights, and the two side uprights are connected to the inclined scraper through a connecting block; the two side uprights and the top plate form a movable cover body at the box opening of the protective cover, and the inner wall of the protective cover is formed with a movable guide groove for facilitating the sliding of the cover body, and the cover body slides on the top surface of the dirt collecting box; when the scraper is extended / pressed back on the dirt collecting box, the cover body moves synchronously with the scraper, so that the size of the dirt inlet channel formed by the scraper and the cover body near the box opening of the filter disc is in a fixed state.

[0011] As a preferred solution of the present invention, the mobile protection component also includes an electromagnetic suction block insulated and placed on the connecting block, a limiting guide groove is provided on the side wall where the scraper is connected to the connecting block, and a metal sheet that cooperates with the electromagnetic suction block is insulated and installed on the groove wall of the limiting guide groove, the electromagnetic suction block is placed in the limiting guide groove, and a second elastic element is provided between the electromagnetic suction block and the limiting guide groove; when the scraper extends out of the dirt collecting box to scrape the sludge layer on the surface of the filter disc, the end of the scraper close to the filter disc extends out of the box opening of the cover body, and when the scraper is pressed back into the dirt collecting box and the filter disc needs to be backwashed, the end of the scraper close to the filter disc that is pressed back is flush with the box opening of the cover body.

[0012] As a preferred solution of the present invention, the automatic distance-changing component includes an electric push rod placed on the filter tank for driving the lifting plate to move, two groups of first guide rail components installed on the filter tank, a second guide rail component horizontally located between the two groups of the first guide rail components, and a lifting plate connected to the first guide rail components and the output rod of the electric push rod; the lifting plate is provided with several groups of through-beam grooves corresponding to several groups of scraping and backwashing components, and each group of two through-beam grooves is symmetrical along the thickness dividing line of the filter disc; the end of each support rod away from the dirt collecting box is connected to a supporting long plate, and a guide rod passing through the through-beam groove is installed on the back of the supporting long plate, and the guide rod is in contact with the groove wall of the through-beam groove through a pulley; the end of each guide rod away from the supporting long plate is connected to a slider on the second guide rail component.

[0013] As a preferred solution of the present invention, the width of the supporting long plate is greater than the width of the inclined slot, and a pulling rod for pulling the dirt collecting box is provided on the supporting long plate.

[0014] As a preferred solution of the present invention, the filter tank is provided with an inlet weir near the water inlet pipe, and the filter tank is provided with an outlet weir near the water outlet pipe. The power unit adopts a chain, a sprocket and a servo motor to drive several filter discs to rotate in the filter tank.

[0015] The present invention has at least one of the following beneficial effects:

[0016] This solution cleverly designs the scraping and backwashing components and cooperates with the automatic variable pitch components. A scraper that can be extended / pressed back is installed obliquely on the side of the dirt collecting box close to the filter disc, so that the sludge layer accumulated on the surface of the filter disc can be scraped off by the extended scraper and enter the dirt collecting box for discharge. This can effectively reduce the phenomenon that when the existing backwashing device is used to scrape the sludge layer, the sludge layer is directly dispersed in the filter tank and cannot be collected accurately and quickly. It can also effectively reduce the phenomenon that a large amount of tap water in the filter tank is discharged simultaneously when the scraped sludge is discharged.

[0017] This solution cleverly sets the fitting side of the scraper and the filter disc as a vertical plane, and the angle between the vertical plane of the scraper close to the filter disc and its inclined upper surface is set at an acute angle of 0 to 30 degrees, so that the angled edge of the scraper can accurately scrape and clean the sludge layer that is relatively tightly gathered on the surface of the filter disc. After the scraper is pressed back into the sewage collection box, the vertical plane outside the scraper can be flush with the side wall of the sewage collection box that fits to the surface of the filter disc, so that the sludge channel on the sewage collection box can be precisely fitted to the surface of the filter disc, thereby realizing efficient backwashing operation of the filter disc.

[0018] This solution cleverly sets an automatic distance-changing component in the filter tank, so that the scrapers and dirt collecting boxes, which are preferably six groups and symmetrical in pairs, are in contact, re-contact and disengagement with the filter disc. This can not only scrape off the sludge accumulated on the surface of the filter disc first, and then backwash the sludge blocked in the mesh, but also can keep the dirt collecting box and the filter disc surface in a non-contact state when the filter disc is not cleaned, so that the filter disc can filter the tap water over the entire area.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the first viewing angle disclosed in the present invention;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of the second viewing angle disclosed by the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the filter disclosed in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the cooperation between the scraping backwashing component and the automatic distance changing component disclosed in the present invention;

[0025] Figure 5 This is a schematic diagram of the matching structure of the dirt collection box and the filter disc disclosed in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the automatic pitch-changing component disclosed in the present invention;

[0027] Figure 7 This is an exploded view of the assembly of the dirt collecting box and the scraper disclosed in the present invention;

[0028] Figure 8 This is a schematic diagram of the matching structure of the protective cover and the dirt collecting box in the first embodiment disclosed in the present invention;

[0029] Figure 9 This is a schematic diagram of the coordination structure of the protection box, the dirt collecting box and the movable protection assembly 9 in the second embodiment disclosed in the present invention;

[0030] Figure 10 This is an exploded view of the assembly of the cover body and the protective cover in the second embodiment disclosed in the present invention.

[0031] In the figure: 1, filter tank; 101, water inlet pipe; 102, water inlet weir; 103, water outlet pipe; 104, water outlet weir;

[0032] 2. Water collecting pipe;

[0033] 3. Filter disc;

[0034] 4. Power unit; 41. Chain; 42. Sprocket; 43. Servo motor;

[0035] 5. Scraping and backwashing components; 51. Dirt collecting box; 511. Recessed notch; 512. Guide chute; 52. Support rod; 53. Scraper; 531. Positioning guide groove; 54. Dirt suction hose; 55. Guide slider; 56. First elastic element;

[0036] 6. Backwash pump assembly;

[0037] 7. Automatic pitch-changing component; 71. Electric push rod; 72. First guide rail component; 73. Second guide rail component; 74. Lifting plate; 741. Through-bevel slot; 75. Supporting long plate; 76. Guide rod; 77. Pulley; 78. Pull rod;

[0038] 8. Protective cover; 81. Moving guide groove;

[0039] 9. Mobile protection assembly; 91. Side panels; 92. Top panel; 93. Connecting block; 94. Cover; 95. Electromagnetic suction block; 96. Metal sheet. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] See also Figures 1-10As shown, the present invention is a tap water treatment equipment with a multiple filter membrane structure, comprising a filter tank 1, a water collection pipe 2 installed inside the filter tank 1, and a plurality of filter discs 3 vertically installed on the water collection pipe 2 and used for filtering tap water, the filter tank 1 is connected to a water inlet pipe 101 and a water outlet pipe 103, and the filter tank 1 is provided with a power unit 4 for driving the filter disc 3 to rotate; a plurality of groups of scraping backwashing components 5 are provided in the filter tank 1, and a plurality of groups of the scraping backwashing components 5 are connected to an automatic pitch-changing component 7 installed near the side wall of the filter tank 1; each group of the scraping backwashing components 5 includes a dirt collecting box 51 placed on both sides of the filter disc 3 and a support rod 52 for connecting the dirt collecting box 51 to the automatic pitch-changing component 7, the dirt collecting box 51 is obliquely installed with a scraper 53 that can be extended / pressed back at the box wall near the filter disc 3, and the bottom of the dirt collecting box 51 is connected to a dirt suction hose 54 connected to the backwash pump assembly 6;

[0043] The filter tank 1 is provided with an inlet weir 102 near the inlet pipe 101, and an outlet weir 104 near the outlet pipe 103. The power unit 4 uses a chain 41, a sprocket 42 and a servo motor 43 to drive the plurality of filter discs 3 to rotate in the filter tank 1.

[0044] In a preferred embodiment of this scheme, when the tap water to be filtered is introduced into the filter tank 1 through the cooperation of the water inlet pipe 101 and the water inlet weir 102, the filter tank 1 is equipped with preferably six filter discs 3 to filter the tap water, and the filtered tap water is transported to the outlet weir 104 through the central water collection pipe 2 and then discharged through the outlet pipe 103;

[0045] As tap water is continuously filtered by the filter disc 3, the sludge retained on the filter disc 3 forms a sludge layer. As the sludge layer accumulates, the filtration efficiency of the filter disc 3 for raw water is reduced, making the filtration efficiency for raw water lower than the water inlet rate of the water inlet pipe 101, which in turn causes the liquid level in the filter tank 1 to rise. When a static pressure level gauge (not shown) installed on the inner wall of the filter tank 1 detects that the liquid level in the filter tank 1 has risen to a set value, the equipment automatically enters a backwash state. At this time, a PLC control system installed at the filter tank 1, such as a control cabinet (not shown), controls the automatic variable pitch component 7 to move, driving the six groups of dirt collection boxes 51 symmetrically arranged on both sides of the filter disc 3 to move toward the surface of the filter disc 3. At this time, the end of the scraper 53 close to the filter disc 3 is in contact with the surface of the filter disc 3, while a small section of the inner end of the scraper 53 is inside the dirt collection box 51. Therefore, when the servo motor 43 fixed to the pool port of the filter tank 1 is working, the chain 41 and the sleeve The cooperation of the sprocket 42 connected to the water collection pipe 2 can make the water collection pipe 2 drive the multiple filter discs 3 to rotate. At this time, the backwash pump assembly 6 is started synchronously, including a collection pipe, a diversion pipe and a sewage main pipe outside the filter tank 1 connected to the multiple sewage suction hoses 54 located in the filter tank 1, as well as a (sewage pump) not shown in the figure, so that the suction force generated is applied to the sewage collection box 51 through the multiple sewage suction hoses 54, and then the scraper 53 attached to the surface of the filter disc 3 will first scrape off the sludge adhered to the surface of the continuously rotating filter disc 3, and the scraped sludge and part of the tap water will enter the sewage collection box 51 along the inclined scraper 53, so that a large part of the sludge layer scraped by the scraper 53 will be directly collected and discharged through the sewage collection box 51 and the sewage suction hose 54, and a small part of the sludge will fall to the bottom of the filter tank 1, thereby effectively reducing the phenomenon that the sludge layer is directly dispersed in the filter tank 1 and cannot be accurately and quickly collected when the existing backwashing device is used to scrape the sludge layer;

[0046] When it is necessary to backwash the sludge accumulated in the mesh of the filter cloth on the filter disc 3, the automatic pitch-changing component 7 is continuously controlled to operate, so that the dirt collecting box 51 continues to move toward the surface of the filter disc 3, so that the scraper 53 can be pressed back into the dirt collecting box 51, and the sludge channel formed between the dirt collecting box 51 and the scraper 53 will fit the surface of the filter disc 3. Then, the rotation of the filter disc 3 and the operation of the backwashing pump assembly 6 can backwash the sludge accumulated in the mesh of the filter cloth of the filter disc 3 into the dirt collecting box 51 through the sludge channel, and then be discharged through the suction hose 54 and other structures, thereby also being able to backwash the sludge accumulated in the mesh of the filter cloth of the filter disc 3.

[0047] When the scraping and backwashing component 5 is no longer needed to work, the automatic distance-changing component 7 can drive the scraping and backwashing component 5 to move in a direction away from the surface of the filter disc 3, and the scraper 53 will be extended out of the dirt collecting box 51 again under the drive of the pushing guide component, and the dirt collecting box 51 will no longer be attached to the surface of the filter disc 3, so that the filter disc 3 can filter the tap water in its entirety, and the existing backwashing device will not be in a fixed state and attached to the surface of the filter disc 3, causing the contact position between the filter disc 3 and the backwashing device to be unable to filter the tap water;

[0048] This solution cleverly designs the scraping and backwashing component 5 and cooperates with the automatic pitch-changing component 7. A scraper 53 that can be extended / pressed back is installed obliquely on the side of the dirt collecting box 51 close to the filter disc 3, so that the sludge layer accumulated on the surface of the filter disc 3 can be scraped off by the extended scraper 53 and enter the dirt collecting box 51 for discharge. This can effectively reduce the phenomenon that when the sludge layer is scraped off by the existing backwashing device, the sludge layer is directly dispersed in the filter tank 1 and cannot be collected accurately and quickly. The scraper 53 is pressed back into the dirt collecting box 51, and the sludge accumulated in the filter cloth mesh of the filter disc 3 is backwashed into the dirt collecting box 51 through the sludge channel, thereby also being able to backwash the sludge accumulated in the filter cloth mesh of the filter disc 3.

[0049] See also Figure 1-Figure 7 As shown, the dirt collecting box 51 is provided with a pushing guide component for providing thrust for the scraper 53, and the pushing guide component includes a guide slider 55 and a first elastic element 56; the width of the scraper 53 is smaller than the internal width of the dirt collecting box 51, and the end surface of the scraper 53 that is in contact with the filter disc 3 is parallel to the outer surface of the filter disc 3; the box wall of the dirt collecting box 51 close to the filter disc 3 is provided with a recessed notch 511 from top to bottom to support the scraper 53, and the bottom of the recessed notch 511 is formed with a sloped surface that matches the bottom surface of the inclined scraper 53, and the side wall of the scraper 53 is in contact with the groove wall of the recessed notch 511; the side wall of the dirt collecting box 51 that contacts the scraper 53 is inclined to form a guide inclined groove 512 that facilitates the sliding of the guide slider 55, and the guide slider 55 is connected to the scraper 53; a first elastic element 56 that provides force for the scraper 53 is connected between the guide slider 55 and the groove wall of the guide inclined groove 512;

[0050] In a preferred embodiment of this scheme, when the dirt collecting box 51 moves in the direction away from the filter disc 3 under the drive of the automatic pitch-changing component 7, the first elastic element 56, which is preferably a spring, located in the guide chute 512 will apply a pushing force to the scraper 53 through the guide slider 55, so that the scraper 53 is tilted along the slope of the recessed notch 511 and extends out of the dirt collecting box 51. Then, when the automatic pitch-changing component 7 drives the dirt collecting box 51 to move toward the surface of the filter disc 3, the scraper 53 will contact the surface of the filter disc 3 to scrape off the sludge layer accumulated on the surface of the filter disc 3. When the dirt collecting box 51 moves toward the surface of the filter disc 3, the scraper 53 will be continuously pressed back into the dirt collecting box 51. At this time, the guide slider 55 will slide in the guide chute 512, and the first elastic element 56 will be compressed, so that a part of the scraper 53 will be tilted and located in the dirt collecting box 51, which can collect dirt. The sludge layer rushed into the box 51 is blocked to prevent tap water and sludge from entering the dirt collecting box 51 due to the suction force of the dirt suction hose 54, which will cause the sludge layer to roll in the dirt collecting box 51, thereby affecting the dirt collecting effect of the dirt collecting box 51 on scraping and collecting the sludge. When the dirt collecting box 51 is completely attached to the surface of the filter disc 3, the side of the scraper 53 will be flush with the outer side of the recessed notch 511. Since the width of the scraper 53 is limited to be smaller than the internal width of the dirt collecting box 51, there is a certain gap between the end face of the scraper 53 located inside the dirt collecting box 51 and the inner wall of the dirt collecting box 51. When the dirt collecting box 51 is attached to the surface of the filter disc 3 for backwashing, the backwashed sludge can enter the dirt collecting box 51 through the sludge channel formed by the pushed-back scraper 53 and the recessed notch 511, thereby realizing sealed collection of the backwashed sludge.

[0051] This solution cleverly sets the scraper 53 and the contact side of the filter disc 3 as a vertical plane, and the angle between the vertical plane of the scraper 53 close to the filter disc 3 and its inclined upper surface is set at an acute angle of 0 to 30 degrees, so that the angled edge of the scraper 53 can accurately scrape and clean the sludge layer that is relatively tightly gathered on the surface of the filter disc 3. After the scraper 53 is pressed back into the dirt collecting box 51, the vertical plane outside the scraper 53 can be flush with the side wall of the dirt collecting box 51 on the surface of the filter disc 3, so that the dirt collecting box The sludge channel on 51 can be precisely fitted to the surface of the filter disc 3, thereby realizing efficient backwashing of the filter disc 3, and the bottom surface and front and rear side surfaces of the scraper 53 are fitted with the slope surface of the recessed notch 511 and the front and rear inner walls of the dirt collecting box 51, which can not only provide gravity support and front and rear limit for the extended scraper 53, but also seal the sludge bin formed on the lower surface of the scraper 53 and inside the dirt collecting box 51 to prevent the sludge collected in the dirt collecting box 51 from leaking.

[0052] See also Figure 3-Figure 6As shown, the automatic distance-changing component 7 includes two electric push rods 71 ​​fixedly mounted on the inner wall of the front side of the filter tank 1 for driving the lifting plate 74 to move vertically up and down, two groups of first guide rail components 72 vertically mounted on the inner wall of the front side of the filter tank 1, a second guide rail component 73 horizontally located between the two groups of first guide rail components 72, and a lifting plate 74 connected to the first guide rail component 72 and the output rod of the electric push rod 71; the lifting plate 74 is provided with a plurality of groups of through-beam slots 741 corresponding to the plurality of groups of scraping and backwashing components 5, and each group of two through-beam slots 741 is symmetrical along the thickness dividing line of the filter disc 3; each of the support rods 52 is connected to a supporting long plate 75 at the end away from the dirt collecting box 51, and a guide rod 76 passing through the through-beam slot 741 is installed on the back of the support long plate 75, and the guide rod 76 is in contact with the groove wall of the through-beam slot 741 through a pulley 77; the end of each guide rod 76 away from the support long plate 75 is connected to a slider on the second guide rail component 73;

[0053] In the preferred embodiment of this scheme, the through inclined grooves 741 symmetrically arranged along the thickness dividing line of the filter disc 3 are in an inverted / positive "eight" shape. Taking the inverted "eight" shape in the attached figure as an example, when it is necessary to drive the dirt collecting box 51 away from the filter disc 3, the output rods of the two electric push rods 71 ​​are extended through the control cabinet (not shown in the figure), so as to drive the lifting plate 74 to descend vertically inside the filter tank 1. The two sliders of the two sets of first guide rail components 72 are connected to the lifting plate 74 to play a vertical guiding role therefor. When the lifting plate 74 descends, the distance between the guide rods 76 on the back of the two supporting long plates 75 is increased, so that the supporting long plates 75 and the support rods 52 The dirt collecting box 51 is driven to move in the direction away from the filter disc 3, so that the dirt collecting box 51 is out of contact with the filter disc 3, so that the filter disc 3 can filter the tap water over the entire area. When the dirt collecting box 51 needs to move in the direction of the filter disc 3, the output rods of the two electric push rods 71 ​​are controlled to be retracted, so that the lifting plate 74 is driven to rise vertically inside the filter tank 1, so that the distance between the two guide rods 76 located on the symmetrical through chute 741 is reduced, so that the outer end of the scraper 53 and the dirt collecting box 51 are sequentially attached to the surface of the filter disc 3, so that the sludge accumulated on the surface of the filter disc 3 is first scraped off, and then the sludge blocked in the mesh is backwashed;

[0054] The pulley 77 can play a role of rolling friction on the guide rod 76 and the through-bevel groove 741. Since the guide rod 76 is connected to the slider of the second guide rail component 73, the second guide rail component 73 can play a role of gravity support and horizontal guidance for the guide rod 76, the supporting long plate 75 and the dirt collecting box 51 connected by the support rod 52.

[0055] This solution cleverly sets an automatic distance-changing component 7 in the filter tank 1, so that the scrapers 53 and the dirt collecting box 51, which are preferably six groups and symmetrical in pairs, are in contact, re-contact and disengagement with the filter disc 3. This can not only scrape off the sludge accumulated on the surface of the filter disc 3 first, and then backwash the sludge blocked in the mesh, but also can keep the dirt collecting box 51 and the surface of the filter disc 3 in a non-contact state when the filter disc 3 is not cleaned, so that the filter disc 3 can filter the tap water over the entire area.

[0056] See also Figure 4 and Figure 6 As shown, the width of the supporting long plate 75 is greater than the width of the oblique slot 741 , and a pulling rod 78 for pulling the dirt collecting box 51 is provided on the supporting long plate 75 ;

[0057] In a preferred embodiment of this scheme, the size of the supporting long plate 75 is designed to prevent the supporting long plate 75 from entering the through-bevel groove 741 when the lifting plate 74 is lifted up and down in the filter tank 1, thereby affecting the supporting long plate 75 supporting and pulling the dirt collecting box 51 through the support rod 52 and the pulling rod 78.

[0058] In the first embodiment of this solution: Figure 5 、 Figure 7 and Figure 8 As shown, a protective cover 8 with a top seal and side openings is provided at the upper opening of the dirt collecting box 51, and a dirt inlet channel corresponding to the inclined scraper 53 is formed on the box wall of the protective cover 8 close to the filter disc 3;

[0059] In the preferred first embodiment of this scheme, the side of the opening of the fixed protective cover 8 is close to the side of the filter disc 3, so that the size of the sewage inlet channel formed between the protective cover 8 and the inclined scraper 53 can change with the size of the scraper 53 extending out of the sewage collection box 51. For example, when the scraper 53 just approaches the surface of the filter disc 3, the size of the sewage inlet channel formed by the scraper 53 and the side opening of the protective cover 8 is the largest, so that the large pieces of sludge scraped away can quickly enter the sewage collection box 51. As the scraper 53 is continuously pressed into the sewage collection box 51, the scraper 53 is pressed into the sewage collection box 51. The size of the sewage inlet channel formed by the openings on the sides of 53 and the protective cover 8 is reduced, so that small sludge layers on the surface of the filter disc 3 that are difficult to scrape off can also accurately enter the sewage collecting box 51 through the reduced sludge channel, and then the movable scraper 53 and the protective cover 8 cooperate to quickly collect sludge layers of different sizes and enter the sewage collecting box 51. When the scraper 53 is pressed back to be flush with the side of the sewage collecting box 51, the side of the opening of the protective cover 8 will also accurately fit with the surface of the filter disc 3, so that it can cooperate with the sewage collecting box 51 to backwash the filter disc 3.

[0060] In the second embodiment of this solution: See Figure 5 、 Figure 9 and Figure 10 As shown, a protective cover 8 is installed at the upper opening of the dirt collection box 51, and a movable protective component 9 is installed at the opening of the protective cover 8 near the filter disc 3. The movable protective component 9 is connected to the scraper 53. When the scraper 53 is extended or pressed back into the collection box, the movable protective component 9 moves synchronously with the scraper 53.

[0061] The movable protection assembly 9 includes two front and rear side panels 91 slidably placed on the protective cover 8 near the surface opening of the filter disc 3 and a top panel 92 located on the top surface of the two side panels 91. The two side panels 91 are connected to the inclined scraper 53 via a connecting block 93.

[0062] The two side panels 91 and the top panel 92 are arranged at the opening of the protective cover 8 to form a movable cover 94. The inner wall of the protective cover 8 is formed with a movable guide groove 81 for facilitating the sliding of the cover 94. The cover 94 slides on the top surface of the dirt collecting box 51, so that the dirt collecting box 51 can provide gravity support for the enclosed cover 94, thereby preventing the cover 94 from being detached from the dirt collecting box 51 due to the impact of tap water.

[0063] When the scraper 53 extends / presses back on the dirt collection box 51, the cover 94 moves synchronously with the scraper 53, so that the size of the dirt inlet channel formed by the scraper 53 and the cover 94 near the box opening of the filter disc 3 is fixed;

[0064] Compared with the first embodiment, the protective cover 8 is fixedly mounted on the opening of the dirt collecting box 51, so that the size of the sludge channel can be adjusted as the scraper 53 moves.

[0065] In the second preferred embodiment of this scheme, when the dirt collecting box 51 is separated from the surface of the filter disc 3, the scraper 53 is pushed out to the maximum distance by the first elastic element 56. At this time, the scraper 53 will drive the front and rear cover bodies 94 to continuously extend from the movable guide groove 81 opened on the inner wall of the protective cover 8 through the connecting blocks 93 connected to the front and rear side walls. Since the left and right width dimensions of the protective cover 8 are larger than the functional width dimension of the enclosed cover body 94, the cover body 94 will not separate from the protective cover 8. Since the cover body 94 extends synchronously with the scraper 53, when the scraper 53 is continuously pressed back, the cover body 94 also synchronously follows the scraper 53 to slide into the inside of the protective cover 8, so that the size of the sludge channel formed by the opening of the cover body 94 close to the side of the filter disc 3 and the outer end of the scraper 53 is in a fixed state;

[0066] Compared with the first embodiment, since the sludge channel formed by the extended scraper 53 and the fixed side opening of the protective cover 8 is exposed at the front, back and top, the scraped sludge layer will inevitably be partially scattered in the filter tank 1 under the push of the tap water in the filter tank 1;

[0067] In the second embodiment, since the enclosed cover 94 moves synchronously with the extended scraper 53, the size of the sludge channel formed between the cover 94 and the scraper 53 is in a fixed state, so that a smaller area of ​​the space above the extended scraper 53 is exposed. Then, when the scraper 53 scrapes the sludge layer on the surface of the rotating filter disc 3, the scraped sludge layer will be in the scraping area enclosed between the scraper 53 and the extended cover 94, thereby reducing the contact area between the scraped sludge layer and the tap water around the dirt collection box 51. The suction force generated by the dirt collection box 51 will draw the tap water around the cover 94 into the cover 94 through the gap retained between the cover 94 and the filter disc 3, thereby facilitating the scraped sludge layer to be brought into the dirt collection box 51. Not only will it not cause unnecessary waste of unfiltered tap water, but it can also accurately suck the scraped sludge layer out through the dirt collection box 51.

[0068] See also Figure 5 、 Figure 9 and Figure 10 As shown, the mobile protection assembly 9 further includes an electromagnetic suction block 95 insulated and placed on the inner side of the connecting block 93. A limiting guide groove 531 is defined on the side wall where the scraper 53 and the connecting block 93 are connected. A metal sheet 96 that cooperates with the electromagnetic suction block 95 is insulated and mounted on the groove wall of the limiting guide groove 531. The electromagnetic suction block 95 is slidably placed in the limiting guide groove 531, and a second elastic element is provided between the electromagnetic suction block 95 and the limiting guide groove 531.

[0069] When the scraper 53 extends out of the dirt collecting box 51 to scrape the sludge layer on the surface of the filter disc 3, the end of the scraper 53 close to the filter disc 3 extends out of the box opening of the cover 94. When the scraper 53 is pressed back into the dirt collecting box 51 to backwash the filter disc 3, the end of the scraper 53 close to the filter disc 3 is flush with the box opening of the cover 94.

[0070] In order to prevent the cover 94 from extending synchronously with the scraper 53 and the opening of the cover 94 from being in contact with the surface of the filter disc 3 when the scraper 53 is in contact with the surface of the filter disc 3, thereby preventing the sludge layer accumulated on the surface of the filter disc 3 from being directly scraped off and cleaned by the cover 94 when the filter disc 3 rotates;

[0071] In the preferred second embodiment of this scheme, the width of the electromagnetic suction block 95 is smaller than the width of the connecting block 93. When the scraper 53 is continuously pressed back into the dirt collecting box 51, and the cover 94 surrounded by the two side vertical plates 91 and the top plate 92 is completely pressed back into the movable guide groove 81, at this time, since the scraper 53 is close to the filter disc 3, part of the plate body is still located outside the cover 94. Then, as the dirt collecting box 51 continues to move toward the surface of the filter disc 3, when the electromagnetic suction block 95 is controlled to be powered off, the electromagnetic suction block 95 will be separated from the adsorption of the metal sheet 96, so that the electromagnetic suction block 95 is relatively close to the limit guide groove 531. The second elastic element, which is preferably a spring, will be stretched. When the side wall of the cover 94 with the box opening is in contact with the surface of the filter disc 3, the outer vertical surface of the scraper 53 and the outer side surface of the connecting block 93 will be in contact with the surface of the filter disc 3 at the same time, so that the sludge channel formed between the cover 94 and the scraper 53 can be sealed and attached to the surface of the filter disc 3 for backwashing. Since only the cover 94, the scraper 53 and the connecting block 93 are in sealing contact with the rotating filter disc 3, the contact friction area between the dirt collecting box 51 and the filter disc 3 can be reduced, thereby improving the service life of the dirt collecting box 51.

[0072] When the dirt collecting box 51 is separated from the surface of the filter disc 3 and the scraper 53 is pushed out by the first elastic element 56, the second elastic element will generate a pulling force on the electromagnetic suction block 95, so that the electromagnetic suction block 95 moves in the opposite direction of the scraper 53 in the limiting guide groove 531, thereby causing a part of the side of the scraper 53 close to the filter disc 3 to extend out of the cover 94. At this time, the electromagnetic suction block 95 can be energized as needed to make it adsorbed on the metal sheet 96, thereby controlling a part of the outer side of the scraper 53 to move. Part of the plate body extends out of the cover body 94, and the scraper 53 continues to extend, which will drive the cover body 94 to move synchronously, so that the plate body of the scraper 53 extending out of the cover body 94 can contact the filter disc 3, so that a certain gap is formed between the opening of the cover body 94 and the surface of the filter disc 3, and the sludge layer accumulated on the surface of the filter disc 3 can enter the scraping area between the cover body 94 and the scraper 53, thereby facilitating the rapid and accurate collection of the sludge layer scraped by the scraper 53 into the dirt collecting box 51, and then discharged through the dirt suction hose 54.

[0073] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A tap water treatment device with a multiple filter membrane structure, comprising a filter tank, a water collection pipe installed inside the filter tank, and a plurality of filter discs vertically mounted on the water collection pipe for filtering tap water, wherein the filter tank is connected to an inlet pipe and an outlet pipe, and a power unit for driving the filter discs to rotate is provided on the filter tank; characterized in that: Several groups of scraping and backwashing components are provided in the filter tank, and the several groups of scraping and backwashing components are connected to automatic distance-changing components installed near the side wall of the filter tank; Each set of scraping and backwashing components includes a dirt collecting box placed on both sides of the filter disc and a support rod for connecting the dirt collecting box to the automatic pitch-changing component. The dirt collecting box is obliquely installed with a scraper that can be extended / pressed back at the box wall close to the filter disc. The bottom of the dirt collecting box is connected to a dirt suction hose connected to the backwash pump assembly. The dirt collecting box is provided with a pushing guide component that provides thrust for the scraper, and the pushing guide component includes a guide slider and a first elastic element; The width of the scraper is smaller than the internal width of the dirt collecting box, and the end surface of the scraper in contact with the filter disc is parallel to the outer surface of the filter disc; The wall of the dirt collecting box close to the filter disc is provided with a recessed notch from top to bottom for supporting the scraper; The side wall of the dirt collecting box that contacts the scraper is inclined to open a guide inclined groove to facilitate the sliding of the guide slider, and the guide slider is connected to the scraper; A first elastic element is connected between the guide slider and the groove wall of the guide chute to provide a force for the scraper; A protective cover with a top seal and side openings is provided at the upper opening of the dirt collecting box, and a dirt inlet channel corresponding to the inclined scraper is formed on the box wall of the protective cover close to the filter disc.

2. The tap water treatment equipment with a multiple filter membrane structure according to claim 1, characterized in that: A protective cover is installed at the upper box opening of the dirt collection box, and a movable protective component is installed at the box opening of the protective cover close to the filter disc. The movable protective component is connected to the scraper. When the scraper is extended / pressed back into the collection box, the movable protective component moves synchronously with the scraper.

3. The tap water treatment equipment with a multiple filter membrane structure according to claim 2, characterized in that: The movable protection assembly includes two side plates slidably placed on the protective cover near the opening of the filter disc surface and a top plate located on the top surface of the two side plates, and the two side plates are connected to the inclined scraper through a connecting block; The two side panels and the top panel are formed into a movable cover at the box opening of the protective cover, and the inner wall of the protective cover is formed with a movable guide groove for facilitating the sliding of the cover, and the cover slides on the top surface of the dirt collecting box; When the scraper extends / presses back on the dirt collecting box, the cover moves synchronously with the scraper, so that the size of the dirt inlet channel formed by the scraper and the cover near the box opening of the filter disc is fixed.

4. The tap water treatment equipment with a multiple filter membrane structure according to claim 3, characterized in that: The movement protection assembly further includes an electromagnetic suction block insulated and placed on the connecting block, a limiting guide groove is provided on the side wall where the scraper is connected to the connecting block, and a metal sheet that cooperates with the electromagnetic suction block is insulated and mounted on the groove wall of the limiting guide groove, the electromagnetic suction block is placed in the limiting guide groove, and a second elastic element is provided between the electromagnetic suction block and the limiting guide groove; When the scraper extends out of the dirt collecting box to scrape the sludge layer on the surface of the filter disc, the end of the scraper close to the filter disc extends out of the box opening of the cover body. When the scraper is pressed back into the dirt collecting box and the filter disc needs to be backwashed, the end of the scraper close to the filter disc is flush with the box opening of the cover body.

5. The tap water treatment equipment with a multiple filter membrane structure according to claim 1, characterized in that: The automatic pitch-changing component includes an electric push rod placed on the filter tank for driving the lifting plate to move, two sets of first guide rail components installed on the filter tank, a second guide rail component horizontally located between the two sets of first guide rail components, and a lifting plate connected to the first guide rail components and the output rod of the electric push rod; The lifting plate is provided with a plurality of groups of through chute grooves corresponding to the plurality of groups of scraping and backwashing components, and the two through chute grooves in each group are symmetrical along the thickness dividing line of the filter disc; The end of each support rod away from the dirt collecting box is connected to a support long plate, and the back of the support long plate is installed with a guide rod passing through the through-bevel slot, and the guide rod contacts the slot wall of the through-bevel slot through a pulley; The end of each guide rod away from the supporting long plate is connected to the slider on the second guide rail component.

6. The tap water treatment equipment with a multiple filter membrane structure according to claim 5, characterized in that: The width of the supporting long plate is greater than the width of the oblique slot, and a pulling rod for pulling the dirt collecting box is provided on the supporting long plate.

7. The tap water treatment equipment with a multiple filter membrane structure according to claim 1, characterized in that: The filter tank is provided with an inlet weir near the water inlet pipe, and an outlet weir near the water outlet pipe. The power unit adopts the cooperation of chain, sprocket and servo motor to drive several filter discs to rotate in the filter tank.

Images