Self-cleaning filtering equipment

Abstract

The utility model relates to self-cleaning filtering equipment which comprises a power device and a filtering unit, the power device is used for providing power, the filtering unit comprises a first filtering device and a second filtering device, the first filtering device is provided with a water inlet, and the second filtering device is provided with a water outlet. Drain outlets are formed in the bottoms of the first filtering device and the second filtering device, a transfer pipeline and a backwashing pipeline are arranged between the first filtering device and the second filtering device, and control valves are mounted on the transfer pipeline and the backwashing pipeline. By means of the first filtering device and the second filtering device which are arranged in sequence, different kinds of impurities in water are removed at a time, multi-stage filtering of water is achieved, the filtering effect is effectively improved, then by arranging the backwashing pipeline, backwashing work is conducted on the filtering equipment, impurities in the filtering system can be removed, the self-cleaning function is achieved, and the filtering efficiency is improved. The whole filtering effect is guaranteed, the filtering efficiency is improved, meanwhile, the cleaning and maintenance frequency of workers can be effectively reduced, and the equipment operation and maintenance cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a self-cleaning filtering equipment. Background Art

[0002] During the use of the cooling tower, its circulating water usually accumulates a lot of impurities and dirt. If it is not cleaned in time, it is easy to clog the water pump and cooling pipes, reduce the cooling efficiency of the cooling tower, and seriously affect the normal operation of the cooling tower.

[0003] At present, cooling towers are usually connected to filtering equipment for extracting and filtering the circulating water in the cooling tower to remove impurities therein. However, the existing filtering equipment usually only performs a solid-liquid separation filtration on the circulating water in the cooling tower. This method can only remove solid impurities of a certain size in the circulating water. For some fine impurities, organic matter and some soluble substances, the removal effect is poor, resulting in some of them remaining in the circulating water. Over time, it is easy to cause algae reproduction, bacterial growth and pollution in the circulating water. In addition, the existing filtering equipment requires manual regular cleaning of the internal filter material layer to ensure the normal filtering performance of the filtering equipment. The cleaning frequency is high, which is time-consuming and labor-intensive. At the same time, it will cause the cooling tower equipment to be frequently shut down for cleaning of the filtering equipment, which greatly increases the operation and maintenance costs. Utility Model Content

[0004] In view of this, the utility model provides a self-cleaning filtering device which can solve the above problems.

[0005] A self-cleaning filtering device comprises a power device and a filtering unit, wherein the power device is used to provide power, and the filtering unit comprises a first filtering device and a second filtering device, wherein the first filtering device is provided with a water inlet, and the second filtering device is provided with a water outlet, and the bottoms of the first filtering device and the second filtering device are both provided with sewage outlets, and a transfer pipeline and a backwash pipeline are provided between the first filtering device and the second filtering device, and control valves are installed on the transfer pipeline and the backwash pipeline.

[0006] In the above technical solution, the power device is arranged at the front end of the filter unit, which is used to send the circulating water to be filtered and treated in the cooling tower into the filter unit and provide power for it to flow in the filter unit. The filter unit includes a first filter device and a second filter device arranged in sequence, wherein the circulating water first enters the first filter device through the water inlet for primary filtration. The first filter device has the effect of solid-liquid separation and can separate a large part of the solids in the circulating water. After completing the primary filtration, the circulating water enters the second filter device through the transfer pipeline for secondary filtration. The second filter device can remove trace fine impurities and some soluble substances in the circulating water, further purify the circulating water, and effectively remove impurities in the circulating water. The circulating water treated by the second filter device is sent back to the container for containing the circulating water in the cooling tower through the water outlet to complete the filtration. The first filter device and the second filter device are arranged in sequence to filter out the larger solid particles, fine impurities and some soluble substances in the water in sequence, so as to achieve multi-stage filtration of the water, improve the filtration effect, and significantly improve the quality of the filtered water. At the same time, the second filter device is used to remove some fine impurities and soluble substances (such as some organic matter) in the circulating water, which can further inhibit the algae reproduction, bacterial growth and other problems in the cooling tower, and effectively ensure the stability of the water quality in the cooling tower. In addition, a backwash pipeline is arranged between the first filter device and the second filter device, and the transfer pipeline and the backwash pipeline are both installed with A control valve, which can control the opening and closing of the pipeline, as well as the direction, flow rate and speed of the circulating water therein. The direction of the pipeline can be adjusted by the control valve, and the power provided by the power device can be used to backwash the second filter device, thereby removing impurities trapped in the filter material layer of the second filter device. Specifically, when backwashing, the control valve on the transfer pipeline closes the transfer pipeline, and the control valve on the backwash pipeline opens, and the direction of the pipeline is from the second filter device to the first filter device. At this time, water flows in from the water outlet, backwashes the second filter device, removes impurities trapped in the filter material layer during filtration, and the impurities are discharged from the sewage outlet at the bottom of the second filter device after being flushed out, thereby ensuring the filtration of the second filter device. The filter efficiency is improved, wherein when filtering is performed, under the control of the control valve, the transfer pipeline is opened and the backwash pipeline is closed, circulating water enters from the water inlet, and is filtered through the first filter device for primary filtration. The filtered solid particles are discharged from the sewage outlet at the bottom of the first filter device, and then the circulating water enters the second filter device through the transfer pipeline for secondary filtration, and then is discharged from the water outlet. When backwashing is performed, the transfer pipeline is closed, the backwash pipeline is opened, and the flow direction in the backwash pipeline is from the second filter device to the first filter device. At this time, water flows into the water outlet, and the impurities on the filter material layer in the second filter device are peeled off and discharged from the sewage outlet at the bottom, and the water flows from the backwash pipeline.

[0007] It should be noted that backwashing is also called filter flushing. Its principle is to make the water flow reverse through the filter layer to make the filter layer expand and fluidize, so that the impurities trapped in the filter layer during the filtration work are peeled off from the surface of the filter material and taken away with the water flow, completing the cleaning of the filter layer and ensuring the filtration effect; since the filter layer in the filter device will trap some impurities during filtration, these impurities will remain in the filter layer, and excessive accumulation will affect the filtration effect of the filter layer and reduce the filtration efficiency; in this application, the separation of the filter layer in the second filter device It is connected with the transfer pipeline and the sewage outlet at the bottom. When filtering, the connection between the filter layer and the bottom sewage outlet is in a closed state, and water flows into the inner side of the filter layer through the transfer pipeline, and is discharged from the outlet after being filtered by the filter layer. Impurities remain on the inner side of the filter layer and in the filter layer. When backwashing is performed, the connection between the filter layer and the sewage outlet is opened, and impurities trapped on the filter layer are flushed out by the reverse water flow and discharged from the sewage outlet. The second filter device can effectively remove impurities from the filtration system, ensure the filtration effect, and improve the filtration efficiency.

[0008] Therefore, the present application has the following beneficial effects: by sequentially arranging the first filter device and the second filter device, larger solid particles, fine impurities and some soluble substances in the water are filtered out in turn, thereby realizing multi-stage filtration of the water, which can effectively improve the filtration effect and significantly improve the water quality after filtration; in addition, the first filter device of the present application can directly separate the solid impurities and discharge them from the bottom sewage outlet, and for the second filter device, by arranging a transfer pipeline and a backwash pipeline equipped with a control valve, and adjusting the switch and direction of the pipeline by the control valve, the backwashing of the second filter device is realized, and the impurities are discharged from the bottom sewage outlet, thereby effectively removing the fine impurities and some soluble substances trapped in the second filter device. The present application can actually effectively and automatically discharge the impurities in the filtration system, ensure the overall filtration effect, and improve the filtration efficiency. At the same time, it can effectively reduce the cleaning and maintenance frequency of the staff, and effectively reduce the equipment operation and maintenance costs.

[0009] Furthermore, the transfer pipeline and the backwash pipeline include a section of a common pipeline, one end of the transfer pipeline and the backwash pipeline is connected to the second filter device, and the other end is connected to the top of the first filter device through the common pipeline.

[0010] In the above technical solution, the transfer pipeline and the backwash pipeline are provided with a section of common pipeline, one end of the common pipeline is connected to the top of the first filter device, and the other end is connected to the transfer pipeline and the backwash pipeline, that is, the transfer pipeline and the backwash pipeline are two parallel branches after the common pipeline. By setting up a section of common pipeline, the total length of the pipeline can be reduced and the overall structure can be simplified.

[0011] Furthermore, the transfer pipeline is connected to the top position of the side of the second filter device, the backwash pipeline is connected to the middle position of the side of the second filter device, and the water outlet is arranged at the bottom position of the side of the second filter device.

[0012] In the above technical solution, the transfer pipeline is located above the backwash pipeline, and the water outlet is arranged below the connection between the backwash pipeline and the second filtering device.

[0013] Furthermore, the water inlet is connected to a water inlet pipeline, and the power device is installed on the water inlet pipeline.

[0014] In the above technical solution, one end of the water inlet pipe is connected to the water inlet, and the other end is connected to the water storage container of the cooling tower (such as the bottom basin of the cooling tower). The water is pumped out from the bottom basin through the power provided by the power device and transported to the filter unit for filtration through the water inlet pipe.

[0015] Furthermore, a measuring meter is installed on the water inlet pipeline.

[0016] In the above technical solution, the measuring meter is used to measure the pressure and flow rate of the water flow in the water inlet pipeline, so as to facilitate timely detection of abnormalities and ensure the normal operation of the water inlet pipeline.

[0017] Furthermore, the sewage outlets at the bottom of the first filter device and the second filter device are both connected to sewage pipes, and the two sewage pipes are both connected to a sewage channel.

[0018] In the above technical solution, the sewage outlets at the bottom of the first filter device and the second filter device are connected to the sewage channel through a sewage pipe, and sewage is discharged centrally through the sewage channel, which is convenient for collecting sewage.

[0019] Furthermore, a control valve is installed on each of the two sewage pipes, and a switch knob is provided at the end of the sewage channel.

[0020] In the above technical solution, a control valve is provided on the sewage pipe for opening and closing the sewage pipe. The sewage pipe can be closed when sewage discharge is not needed. A switch knob is installed at the outlet end of the sewage channel, and the switch at the outlet of the sewage channel can be controlled by turning the switch knob.

[0021] Furthermore, a rotary switch is installed on the water inlet pipeline, and a control valve is installed on the water outlet.

[0022] In the above technical solution, the switch of the water inlet pipeline can be controlled by rotating the rotary switch. A control valve is installed on the water outlet to control the switch and flow direction at the water outlet, which is used to switch between filtering and backwashing.

[0023] Furthermore, it also includes a mounting base and a control box, the first filter device, the second filter device and the control box are all mounted on the mounting base, and a controller for controlling the operation of the device is provided inside the control box.

[0024] In the above technical solution, the mounting base is used to provide a mounting position, and the first filter device, the second filter device and the control box are all installed on the mounting base by fasteners such as screws. The controller is arranged inside the control box. The controller can automatically receive, process and execute various control instructions, control the filter device, control valve and power device in the equipment, and ensure the normal operation and efficient filtration of the equipment as a whole; wherein, the controller can issue a backwashing instruction according to preset conditions, so as to control the regular removal of impurities in the system, achieve the effect of self-purification, reduce the burden on the filter, and reduce operating costs.

[0025] Furthermore, a support plate is provided between the mounting base and the backwash pipeline, and two ends of the support plate are fixedly connected to the mounting base and the backwash pipeline respectively.

[0026] In the above technical solution, the support plate is used to provide support for the backwash pipeline and the transfer pipeline above, to prevent the long-term impact force of the water flow from causing damage due to excessive pressure in the pipeline, and to ensure the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a three-dimensional diagram of a self-cleaning filtering device according to an embodiment of the present application.

[0029] Figure 2 A three-dimensional diagram of a self-cleaning filtering device according to an embodiment (from another perspective).

[0030] Figure 3 A three-dimensional diagram (side view) of a self-cleaning filtering device according to an embodiment.

[0031] Figure 4 for Figure 3 Enlarged view of position A in the middle.

[0032] Figure 5 This is a front view of the self-cleaning filtering device of the present application.

[0033] Figure 6This is a schematic diagram of the structure when the self-cleaning filtering equipment of the present application is connected to the bottom basin of the cooling tower.

[0034] Figure 7 This is a top view of the self-cleaning filtering device of the present application when connected to the bottom basin of the cooling tower.

[0035] Description of reference numerals in the figures:

[0036] 10-installation base; 11-control box; 12-support plate; 20-first filter device; 21-water inlet; 30-second filter device; 31-water outlet; 40-water inlet pipeline; 41-power device; 42-rotation switch; 43-measuring meter; 50-transfer pipeline; 60-backwash pipeline; 70-control valve; 80-drain channel; 81-drain pipe; 82-switch knob; 90-bottom basin; 91-water outlet pipeline; 92-turbulence nozzle; 93-export. DETAILED DESCRIPTION

[0037] The following will further describe the self-cleaning filtration device of the utility model in combination with specific embodiments and drawings. The drawings are only used for exemplary descriptions, and only show schematic diagrams, not actual drawings, and cannot be understood as limiting the patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] Please refer to Figures 1 to 7 In a preferred embodiment, a self-cleaning filtering device is provided for fully automatically filtering and purifying circulating water of a cooling tower, comprising a power device 41 and a filtering unit, wherein the power device 41 is used to provide power, and the filtering unit comprises a first filtering device 20 and a second filtering device 30, wherein the first filtering device 20 is provided with a water inlet 21, and the second filtering device 30 is provided with a water outlet 31, and the bottoms of the first filtering device 20 and the second filtering device 30 are both provided with sewage outlets (not shown in the figure), and a transfer pipeline 50 and a backwash pipeline 60 are provided between the first filtering device 20 and the second filtering device 30, and control valves 70 are installed on the transfer pipeline 50 and the backwash pipeline 60.

[0039] In this embodiment, the power device 41 is arranged at the front end of the filter unit, which is used to send the circulating water to be filtered and treated in the cooling tower into the filter unit and provide power for it to flow in the filter unit. The filter unit includes a first filter device 20 and a second filter device 30 arranged in sequence, wherein the circulating water first enters the first filter device 20 through the water inlet 21 for primary filtration. The first filter device 20 has a solid-liquid separation effect and can separate a large part of the solids in the circulating water. After completing the primary filtration, the circulating water enters the second filter device 30 through the transfer pipeline 50 for secondary filtration. The second filter device 30 can remove trace fine impurities and some soluble substances in the circulating water. The circulating water is further purified and the impurities in the circulating water are effectively removed. The circulating water treated by the second filter device 30 is sent back to the container for containing the circulating water in the cooling tower through the water outlet 31 to complete the filtration. The first filter device 20 and the second filter device 30 are arranged in sequence to filter out the larger solid particles, fine impurities and some soluble substances in the water in sequence, so as to achieve multi-stage filtration of the water, improve the filtration effect, and significantly improve the quality of the filtered water. At the same time, the second filter device 30 removes some fine impurities and soluble substances (such as some organic matter) in the circulating water, which can further inhibit the problems of algae reproduction and bacterial growth in the cooling tower, and effectively ensure the stability of the water quality in the cooling tower.In addition, a backwash pipeline 60 is also provided between the first filter device 20 and the second filter device 30. Control valves 70 are installed on both the transfer pipeline 50 and the backwash pipeline 60. The control valve 70 can control the opening and closing of the pipeline, as well as the direction, flow rate and speed of the circulating water therein. The direction of the pipeline can be adjusted by the control valve 70, and the second filter device 30 can be backwashed with the power provided by the power device 41, so as to remove impurities trapped in the filter material layer of the second filter device 30. Specifically, when backwashing is performed, the control valve 70 on the transfer pipeline 50 closes the transfer pipeline 50, and the control valve 70 on the backwash pipeline 60 opens, and the direction of the pipeline is from the second filter device 30 to the first filter device 20. At this time, water flows into the water outlet 31, backwashes the second filter device 30, removes impurities trapped in the filter material layer during filtration, and the impurities are flushed out and then discharged from the second filter The sewage outlet at the bottom of the device 30 is discharged to ensure the filtering effect of the second filter device 30 and improve the filtering efficiency. When filtering, under the control of the control valve 70, the transfer pipeline 50 is opened and the backwash pipeline 60 is closed. The circulating water enters from the water inlet 21 and is filtered through the first filter device 20. The filtered solid particles are discharged from the sewage outlet at the bottom of the first filter device 20. Then the circulating water enters the second filter device 30 through the transfer pipeline 50 for secondary filtration and is then discharged from the water outlet 31. When backwashing is performed, the transfer pipeline 50 is closed and the backwash pipeline 60 is opened. The flow direction in the backwash pipeline 60 is from the second filter device 30 to the first filter device 20. At this time, the water flows into the water outlet 31, and the impurities on the filter material layer in the second filter device 30 are peeled off and discharged from the sewage outlet at the bottom. The water flows out from the backwash pipeline 60. ;

[0040] Preferably, the control valve 70 is a solenoid valve, which can accurately control the opening and closing of the pipeline, as well as the flow, direction and speed of the circulating water; the power device 41 is a centrifugal pump, which has the advantages of large flow, high head, stable operation, etc., and can effectively drive the circulation of the fluid.

[0041] In the present embodiment, specifically, a filter layer (not shown in the figure) is provided in the second filter device 30, and the filter layer is used to filter the circulating water and intercept impurities in the water. The upper and lower ends of the filter layer are respectively connected to the transfer pipeline 50 and the sewage outlet at the bottom. When filtering, the connection between the filter layer and the sewage outlet at the bottom is in a closed state, and the water flows into the inner side of the filter layer through the transfer pipeline 50, and is discharged from the water outlet 31 after being filtered by the filter layer. The impurities are then retained on the inner side of the filter layer and in the filter layer. When backwashing is performed, the connection between the filter layer and the sewage outlet is opened, and the impurities intercepted on the filter layer are flushed out by the reverse water flow and discharged from the second filter device 30 from the sewage outlet, thereby effectively removing impurities from the filtration system, ensuring the filtration effect, and improving the filtration efficiency.

[0042] Therefore, the present application has the following beneficial effects: by sequentially arranging the first filter device 20 and the second filter device 30, larger solid particles, fine impurities and some soluble substances in the water are filtered out in turn, thereby realizing multi-stage filtration of the water, which can effectively improve the filtration effect and significantly improve the water quality after filtration; in addition, the first filter device 20 of the present application can directly separate the solid impurities and discharge them from the bottom sewage outlet, and for the second filter device 30, by arranging the transfer pipeline 50 and the backwash pipeline 60 equipped with the control valve 70, and adjusting the switch and direction of the pipeline by the control valve 70, the backwashing of the second filter device 30 is realized, and the impurities are discharged from the bottom sewage outlet, so that the fine impurities and some soluble substances trapped in the second filter device 30 can be effectively removed. The present application can actually automatically discharge the impurities in the filtration system, ensure the overall filtration effect, and improve the filtration efficiency. At the same time, it can effectively reduce the cleaning and maintenance frequency of the staff, and effectively reduce the equipment operation and maintenance costs.

[0043] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, the transfer pipeline 50 and the backwash pipeline 60 include a section of a common pipeline. In this embodiment, the transfer pipeline 50 and the backwash pipeline 60 are provided with a section of a common pipeline, one end of which is connected to the top of the first filter device 20, and the other end is connected to the transfer pipeline 50 and the backwash pipeline 60, that is, the transfer pipeline 50 and the backwash pipeline 60 are two branch roads connected in parallel at the rear section of the common pipeline. By providing a section of a common pipeline, the total length of the pipeline can be reduced and the overall structure can be simplified.

[0044] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, the transfer pipeline 50 is connected to the top position of the side of the second filter device 30, the backwash pipeline 60 is connected to the middle position of the side of the second filter device 30, and the water outlet 31 is provided at the bottom position of the side of the second filter device 30. In this embodiment, the transfer pipeline 50 is located above the backwash pipeline 60, and the water outlet 31 is provided below the connection between the backwash pipeline 60 and the second filter device 30.

[0045] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, the water inlet 21 is connected to a water inlet pipeline 40, and the power device 41 is installed on the water inlet pipeline 40. In this embodiment, one end of the water inlet pipeline 40 is connected to the water inlet 21, and the other end is connected to the water storage container of the cooling tower (such as the bottom basin of the cooling tower). The power provided by the power device 41 is used to pump water out of the bottom basin and transport it to the filter unit through the water inlet pipeline 40 for filtration.

[0046] Please refer to Figures 1 to 5In a non-limiting embodiment of the present application, a measuring meter 43 is installed on the water inlet pipeline 40. In this embodiment, the measuring meter 43 is used to measure the pressure and flow rate of the water flow in the water inlet pipeline 40, so as to facilitate timely detection of abnormalities and ensure the normal operation of the water inlet pipeline 40.

[0047] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, the sewage outlets at the bottom of the first filter device 20 and the second filter device 30 are both connected to sewage pipes 81, and the two sewage pipes 81 are both connected to the sewage channel 80. In this embodiment, the sewage outlets at the bottom of the first filter device 20 and the second filter device 30 are connected to the sewage channel 80 through the sewage pipes 81, and the sewage is discharged centrally through the sewage channel 80, which is convenient for centralized treatment of the sewage.

[0048] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, the two drain pipes 81 are both equipped with a control valve 70, and a switch knob 82 is provided at the end of the drain channel 80. In this embodiment, the drain pipe 81 is provided with a control valve 70 for opening and closing the drain pipe 81, and the drain pipe 81 can be closed when sewage is not needed. The outlet 93 end of the drain channel 80 is equipped with a switch knob 82, and the switch at the outlet 93 of the drain channel 80 can be controlled by turning the switch knob 42.

[0049] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, a rotary switch 42 is installed on the water inlet pipe 40, and a control valve 70 is installed on the water outlet 31. In this embodiment, the switch of the water inlet pipe 40 can be controlled by rotating the rotary switch 42, and the control valve 70 is installed on the water outlet 31, which can control the switch and flow direction at the water outlet 31, and is used for switching between filtering and backwashing.

[0050] It is not limited that, in this embodiment, there are two rotary switches 42, and the two rotary switches 42 are respectively arranged on both sides of the power device 41, so as to facilitate manual control on both sides of the power device 41. In addition to the above method, the position and number of the rotary switches 42 can also be set according to actual needs.

[0051] Preferably, in this embodiment, the control valve 70 is a solenoid valve.

[0052] Please refer to Figures 1 to 5In a non-limiting embodiment of the present application, a mounting base 10 and a control box 11 are also included. The first filter device 20, the second filter device 30 and the control box 11 are all mounted on the mounting base 10, and a controller for controlling the operation of the device is provided inside the control box 11. In this embodiment, the mounting base 10 is used to provide a mounting position, and the first filter device 20, the second filter device 30 and the control box 11 are all mounted on the mounting base 10 by fasteners such as screws. The controller is provided inside the control box 11, and the controller can automatically receive, process and execute various control instructions, control the filter device, the control valve 70 and the power device 41 in the device, etc., to ensure the normal operation and efficient filtration of the entire device; wherein, the controller can issue a backwashing instruction according to preset conditions, so as to control the regular removal of impurities in the system, achieve the effect of self-purification, reduce the burden on the filter, and reduce the operating cost.

[0053] Preferably, the controller uses a PLC control device, which can automatically receive, process and execute various control instructions, thereby effectively ensuring the normal operation and efficient filtration of the entire filtering equipment.

[0054] Please refer to Figures 1 to 5 In a non-limiting embodiment of the present application, a support plate 12 is provided between the mounting base 10 and the backwash pipeline 60, and both ends of the support plate 12 are respectively fixedly connected to the mounting base 10 and the backwash pipeline 60. In this embodiment, the support plate 12 is used to provide support for the backwash pipeline 60 and the transfer pipeline 50 above, so as to avoid damage caused by excessive pressure in the pipeline due to the long-term impact force of the water flow, thereby ensuring the normal operation of the equipment.

[0055] Please refer to Figure 6 to Figure 7 In a preferred embodiment, the self-cleaning filtering device is connected to the bottom basin 90 of the cooling tower, the bottom basin 90 contains circulating water, a plurality of connected water outlet pipes 91 are arranged in the bottom basin 90, the water inlet pipe 40 is connected to the outlet 93 at the bottom of the bottom basin 90, the water outlet 31 is connected to the water outlet pipes 91 in the bottom basin 90 through pipes, and a plurality of turbulent nozzles 92 are arranged on the water outlet pipes 91 at intervals, and the filtered circulating water is sent back to the bottom basin 90 through the turbulent nozzles 92. The turbulent nozzles 92 can effectively accelerate water circulation, prevent impurities from settling, and keep the bottom basin 90 clean. Specifically, the steps of the self-cleaning filtering device during specific operation are as follows:

[0056] When filtering, part of the circulating water enters the water inlet pipe 40 from the outlet 93 at the bottom of the bottom basin 90, and then enters the first filter device 20 for primary filtration. The solid impurities filtered out are discharged from the sewage outlet at the bottom of the first filter device 20. After completing the primary filtration, the circulating water enters the second filter through the transfer pipe 50 for secondary filtration. At this time, the backwash pipe 60 is in a closed state. After completing the secondary filtration, it enters the water outlet pipe 91 in the bottom basin 90 through the water outlet 31, and is sent back to the bottom basin 90 through the turbulent nozzle 92 on the water outlet pipe 91. After multiple extractions of part of the circulating water in the bottom basin 90 for filtration, the filtering and cleaning of the circulating water in the bottom basin 90 is completed.

[0057] When backwashing is performed, the transfer pipeline 50 is closed and the backwash pipeline 60 is opened. Under the action of the power device 41, a portion of circulating water is drawn from the bottom basin 90 through the pipeline into the second filter device 30 for backwashing. Under the action of the reverse water flow, the impurities in the filter layer are flushed out and discharged through the sewage outlet at the bottom of the second filter device 30, completing the cleaning of the second filter device 30, thereby discharging impurities in the entire filtration system and realizing the self-cleaning function, thereby effectively ensuring the filtration effect of the filtration equipment and improving the filtration efficiency.

[0058] It should be noted that a filter layer is provided in the second filter device 30, and the filter layer is used to filter the circulating water and intercept impurities in the water. The upper and lower ends of the filter layer are respectively connected to the transfer pipeline 50 and the bottom sewage outlet, thereby forming a cavity. When filtering, the connection between the filter layer and the bottom sewage outlet is in a closed state, and the water flows into the inner side of the filter layer through the transfer pipeline 50, and is discharged from the water outlet 31 after being filtered by the filter layer. Impurities remain on the inner side of the filter layer and in the filter layer. When backwashing is performed, the connection between the filter layer and the sewage outlet is opened, and the impurities intercepted on the filter layer are flushed out by the reverse water flow and discharged from the second filter device 30 from the sewage outlet, thereby effectively removing impurities from the filtration system, ensuring the filtration effect, and improving the filtration efficiency.

[0059] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A self-cleaning filtering device, comprising a power device and a filtering unit, wherein the power device is used to provide power, and is characterized in that: The filter unit includes a first filter device and a second filter device, the first filter device is provided with a water inlet, the second filter device is provided with a water outlet, the bottom of the first filter device and the second filter device are both provided with a sewage outlet, a transfer pipeline and a backwash pipeline are provided between the first filter device and the second filter device, and control valves are installed on the transfer pipeline and the backwash pipeline.

2. The self-cleaning filtering device according to claim 1, characterized in that: The transfer pipeline and the backwash pipeline include a section of a common pipeline, one end of the transfer pipeline and the backwash pipeline is connected to the second filter device, and the other end is connected to the top of the first filter device through the common pipeline.

3. The self-cleaning filtering device according to claim 2, characterized in that: The transfer pipeline is connected to the top position of the side surface of the second filter device, the backwash pipeline is connected to the middle position of the side surface of the second filter device, and the water outlet is arranged at the bottom position of the side surface of the second filter device.

4. The self-cleaning filtering device according to claim 1, characterized in that: The water inlet is connected to a water inlet pipeline, and the power device is installed on the water inlet pipeline.

5. The self-cleaning filtering device according to claim 4, characterized in that: A measuring meter is installed on the water inlet pipeline.

6. The self-cleaning filtering device according to claim 1, characterized in that: The sewage outlets at the bottom of the first filter device and the second filter device are both connected to sewage pipes, and the two sewage pipes are both connected to sewage channels.

7. The self-cleaning filtering device according to claim 6, characterized in that: Control valves are installed on the two sewage pipes, and a switch knob is provided at the end of the sewage channel.

8. The self-cleaning filtering device according to claim 4, characterized in that: A rotary switch is installed on the water inlet pipeline, and a control valve is installed on the water outlet.

9. The self-cleaning filtering device according to claim 1, characterized in that: It also includes a mounting base and a control box. The first filter device, the second filter device and the control box are all mounted on the mounting base. A controller for controlling the operation of the device is provided inside the control box.

10. The self-cleaning filtering device according to claim 9, characterized in that: A support plate is provided between the mounting base and the backwash pipeline, and two ends of the support plate are fixedly connected to the mounting base and the backwash pipeline respectively.

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