Multi-sand centrifugal double-net full-automatic backwashing filter

Abstract

The utility model relates to the field of water purification treatment, in particular to a multi-sand centrifugal double-net full-automatic backwashing filter, a main body of the multi-sand centrifugal double-net full-automatic backwashing filter consists of a centrifugal filtering device, a conveying device, a double-net filtering device and a backwashing device, and the conveying device is used for communicating the centrifugal filtering device with the double-net filtering device. Through double functions of centrifugation and the double-net filter, water with much sand can be better treated, when the pressure in a cavity of one sand filter is increased, the corresponding first double-clamping electric butterfly valve is controlled to be closed, then the corresponding second double-clamping electric butterfly valve is started, a pressure difference is formed in two cavities in the sand filter, and the pressure in the cavity of the sand filter is reduced. When the filter is used, water permeates into the sandstone filter chamber needing back washing from the inside to the outside through the filter element, so that sandstone and impurities adsorbed on the surface of the filter element are separated, sewage is discharged through the corresponding blow-off pipe, and the other sandstone filter chamber continuously filters the water, so that the purpose of automatically removing sand from the filter without stopping the filter is achieved.

Description

Technical Field

[0001] The utility model relates to the field of water purification and treatment, in particular to a multi-sand centrifugal double-net full-automatic backwashing filter. Background Art

[0002] Well water resources are an important source of local water and regional agricultural irrigation systems and are the foundation of economic development. Agriculture, animal husbandry and aquaculture in arid areas need to be prepared for water conservation, water storage and water transfer to achieve sustainable development of water resources. Among them, water source cleaning and filtration are an indispensable part of water conservation. They are the key to maintaining the sustainable use of water resources and reducing water costs, and are related to the overall water conservation work.

[0003] At present, conventional well water filters on the market are mainly a combination of centrifugal technology and manual mesh filters. They have a simple structure, simple operation, high filtration efficiency and low cost, and are deeply loved by market players. However, this filter also has certain disadvantages. It requires regular manual sand removal, especially for sandy well water, which will lead to frequent sand removal. When there are many impurities in the filter and the sewage discharge cannot reduce the pressure difference, it is necessary to stop the machine, remove the mesh core, manually clean it and then install it into the equipment. If there is a lot of sand and the sand cannot be removed in time, it may cause the filter to be blocked, thereby affecting the continuity and efficiency of subsequent work.

[0004] Therefore, it is necessary to provide a multi-sand centrifugal double-net fully automatic backwash filter that can adapt to flat sand or multi-sand environments. Utility Model Content

[0005] In order to overcome the shortcomings of conventional well water filters, which require stopping the machine to remove the mesh core for manual cleaning to drain sand, which is troublesome, increases the labor intensity of operators and affects the continuity and efficiency of work, the utility model provides a multi-sand centrifugal double-mesh fully automatic backwash filter that can adapt to flat sand or high-sand environments.

[0006] The technical solution of the utility model is: a multi-sand centrifugal double-net fully automatic backwashing filter. The main body of the device is composed of four devices: a centrifugal filter device, a conveying device, a double-net filter device and a backwashing device. The conveying device connects the centrifugal filter device with the double-net filter device. The water in the well first passes through the centrifugal filter device to perform the first stage of mud, sand and gravel removal operation, and then is input into the double-net filter device by the conveying device to complete the second stage of impurities and residual sand and gravel removal operation. The double-net filter device is provided with a backwashing device for automatic sewage and sand discharge.

[0007] Furthermore, the centrifugal filtering device includes a well water pipe, a well water water supply pipe, a check valve, a centrifuge, a sand removal tank, a sand removal solenoid valve and a first bracket. The well water pipe is connected to the well water water supply pipe through a joint, and the other end of the well water water supply pipe is connected to the centrifuge. A check valve is provided at one end of the well water water supply pipe close to the centrifuge, and the flow of water is controlled by the check valve. The bottom end of the centrifuge is connected to the sand removal tank, and the mud and sand separated by the centrifuge are collected through the sand removal tank, and the sand removal tank is supported and fixed by the first bracket, and a sand removal solenoid valve is provided on one side of the sand removal tank.

[0008] Furthermore, the double-net filtering device includes a sand and gravel filter, a second bracket, a filter element, a partition, a drain pipe and a second pair of clamped electric butterfly valves. The centrifuge is connected and communicated with the sand and gravel filter through a conveying device. A water outlet is provided on one side of the sand and gravel filter. The sand and gravel filter is fixedly supported by the second bracket. A filter element is provided inside the sand and gravel filter. The filter element is communicated with the water outlet of the sand and gravel filter. A partition is provided in the middle of the sand and gravel filter. The partition divides the interior of the sand and gravel filter into two left and right chambers, and the filter element passes through the partition. Two drain pipes are provided at the bottom of the sand and gravel filter, and the ends of the two drain pipes are communicated. A second pair of clamped electric butterfly valves are installed on the drain pipes.

[0009] Furthermore, the conveying device includes a connecting pipe, a fire clamp, a valve seat, an exhaust valve, a pressure gauge base and a seismic-resistant pressure gauge. The centrifuge is connected to the sand and gravel filter through the connecting pipe, and the connecting pipe is fixed to the sand and gravel filter through the fire clamp. Two water inlet ends are arranged between the connecting pipe and the sand and gravel filter. The connecting pipe is equipped with a valve seat and a pressure gauge base, the valve seat is equipped with an exhaust valve, and the pressure gauge base is equipped with a seismic-resistant pressure gauge.

[0010] Furthermore, the backwash device includes a first pair of clamped electric butterfly valves and a bypass pipe. The two water inlet ends of the connecting pipe are both installed with the first pair of clamped electric butterfly valves. The two water inlet ends of the connecting pipe are connected and communicated with the two sewage pipes through two bypass pipes.

[0011] Furthermore, it also includes an electronic pressure gauge and a gas pressure relief valve. Two electronic pressure gauges are installed on the sand and gravel filter, and the two electronic pressure gauges are respectively connected to the two chambers of the sand and gravel filter. Two gas pressure relief valves are installed on the sand and gravel filter, and the gas pressure relief valves are respectively connected to the two chambers of the sand and gravel filter, and the two electronic pressure gauges are respectively connected to the signals of the two second pairs of electric butterfly valves.

[0012] Furthermore, it also includes a cleaning valve cover, and two cleaning valve covers are arranged on the sand filter.

[0013] Furthermore, it also includes a 304 stainless steel mesh core, and the 304 stainless steel mesh core is arranged on the water outlet of the sand and gravel filter.

[0014] Furthermore, a fertilizer application port is provided on the connecting pipe.

[0015] Furthermore, it also includes a guide plate, and two guide plates are installed inside the sand removal tank.

[0016] The beneficial effect is: through the dual effects of centrifugal and double-mesh filters, water with a lot of sand can be better treated. When the pressure in one of the sand and gravel filter chambers increases, the corresponding first pair of clamp electric butterfly valves is controlled to close, and then the corresponding second pair of clamp electric butterfly valves are started. A pressure difference is formed in the two cavities inside the sand and gravel filter, and water penetrates from the inside to the outside through the filter element into the sand and gravel filter chamber that needs backwashing, so that the sand and impurities adsorbed on the surface of the filter element are separated, and the sewage is discharged through the corresponding drain pipe, while the other sand and gravel filter chamber continues to filter the water, thereby achieving the purpose of automatically removing sand from the filter without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the sand discharge solenoid valve and the centrifuge of the utility model.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the connecting pipe, exhaust valve and earthquake-resistant pressure gauge of the utility model.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the sand and gravel filter, pressure gauge and exhaust pipe of the utility model.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the bypass pipe and the sewage pipe of the utility model.

[0022] Figure 6 It is a three-dimensional cross-sectional structural schematic diagram of the 304 stainless steel mesh core, filter core and partition of the utility model.

[0023] In the accompanying drawings: 1-well water pipe, 2-sand discharge solenoid valve, 3-well water water supply pipe, 301-connecting pipe, 4-check valve, 5-centrifuge, 501-sand discharge tank, 502-first bracket, 503-guide plate, 6-fire clamp, 7-valve seat, 8-exhaust valve, 9-pressure gauge base, 10-seismic pressure gauge, 11-fertilization port, 12-first pair of clamp electric butterfly valve, 13-304 stainless steel mesh core, 14-second pair of clamp electric butterfly valve, 1401-bypass pipe, 1402-drain pipe, 15-sand filter, 1501-water outlet, 1502-second bracket, 1503-cleaning valve cover, 16-electronic pressure gauge, 17-gas pressure relief valve, 18-filter element, 19-partition. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example: See Figure 1-Figure 6 , the utility model provides a technical solution:

[0026] Multi-sand centrifugal double-mesh fully automatic backwash filter, the main body of this device is composed of four devices: centrifugal filter device, conveying device, double-mesh filter device and backwash device. The conveying device connects the centrifugal filter device with the double-mesh filter device. The water in the well first passes through the centrifugal filter device to perform the first stage of mud, sand and gravel removal operation, and then is input into the double-mesh filter device by the conveying device to complete the second stage of impurities and residual sand and gravel removal operation. The double-mesh filter device is equipped with a backwash device for automatic sewage and sand discharge.

[0027] See also Figure 1 and Figure 2 As shown, the centrifugal filtering device includes a well water pipe 1, a well water water pipe 3, a check valve 4, a centrifuge 5, a sand removal tank 501, a sand removal solenoid valve 2 and a first bracket 502. The top of the well water pipe 1 is connected to the well water water pipe 3 through a flange joint, and the other end of the well water water pipe 3 is connected to the centrifuge 5. A check valve 4 is provided at one end of the well water water pipe 3 close to the centrifuge 5, and the flow of water is controlled by the check valve 4. The bottom of the centrifuge 5 is connected to the sand removal tank 501. Two guide plates 503 are installed at the bottom of the sand removal tank 501. The two guide plates 503 make the internal sediment gather to the middle of the bottom to facilitate the discharge of sediment. The sediment separated by the centrifuge 5 is collected by the sand removal tank 501, and the sand removal tank 501 is supported and fixed by the first bracket 502. A sand removal solenoid valve 2 is provided on one side of the sand removal tank 501.

[0028] See also Figure 4-Figure 6 As shown, the double-net filtering device includes a gravel filter 15, a second bracket 1502, a filter element 18, a partition 19 and a sewage pipe 1402. The centrifuge 5 is connected and communicated with the gravel filter 15 through a conveying device. A clean water outlet 1501 is arranged on the right side of the gravel filter 15. A 304 stainless steel mesh core 13 is arranged on the water outlet 1501 of the gravel filter 15. The 304 stainless steel mesh core 13 is used to isolate the water outlet 1501 to block impurities that have not been filtered clean. The gravel filter 15 is fixedly supported by the second bracket 1502. Two cleaning valve covers 150 are arranged on the gravel filter 15. 3. The two chambers of the sand and gravel filter 15 can be cleaned and maintained by opening the two cleaning valve covers 1503. A filter element 18 is arranged inside the sand and gravel filter 15, and the filter element 18 is connected with the water outlet 1501 of the sand and gravel filter 15. A partition 19 is arranged in the middle of the sand and gravel filter 15, and the partition 19 divides the inside of the sand and gravel filter 15 into two left and right chambers, and the filter element 18 passes through the partition 19. Two sewage pipes 1402 are arranged at the bottom of the sand and gravel filter 15, and the two sewage pipes 1402 are connected at one end away from the sand and gravel filter 15, and a second pair of clamped electric butterfly valves 14 are installed on the sewage pipes 1402.

[0029] See also Figure 1 and Figure 3 As shown, the conveying device includes a connecting pipe 301, a fire clamp 6, a valve seat 7, an exhaust valve 8, a pressure gauge base 9 and a seismic pressure gauge 10. The centrifuge 5 is connected to the sand filter 15 through the connecting pipe 301. The connecting pipe 301 is fixed on the sand filter 15 through the fire clamp 6. Two water inlet ends are arranged between the connecting pipe 301 and the sand filter 15. A fertilizer port 11 is opened on the connecting pipe 301. Fertilizer liquid is added into the connecting pipe 301 through the fertilizer port 11. The connecting pipe 301 is equipped with a valve seat 7 and a pressure gauge base 9. The exhaust valve 8 is installed on the valve seat 7 by bolt connection. By opening the exhaust valve 8, the gas in the connecting pipe 301 can be discharged. The seismic pressure gauge 10 is installed on the pressure gauge base 9 by bolt connection. The seismic pressure gauge 10 is connected to the connecting pipe 301 and is used to detect the water pressure in the connecting pipe 301.

[0030] See also Figure 1-Figure 6 As shown, the backwash device includes a first pair of clamped electric butterfly valves 12 and a bypass pipe 1401. The two water inlet ends of the connecting pipe 301 are installed with the first pair of clamped electric butterfly valves 12. The two water inlet ends of the connecting pipe 301 are connected and communicated with the two sewage pipes 1402 through two bypass pipes 1401. The bypass pipes 1401 are used for emergency water supply.

[0031] See also Figure 1 , Figure 4 and Figure 5 As shown, it also includes an electronic pressure gauge 16 and a gas pressure relief valve 17. Two electronic pressure gauges 16 are installed on the sand and gravel filter 15 by bolt connection. The two electronic pressure gauges 16 are respectively connected to the two chambers of the sand and gravel filter 15. The two electronic pressure gauges 16 respectively monitor the liquid pressure in the two chambers of the sand and gravel filter 15. Two gas pressure relief valves 17 are installed on the sand and gravel filter 15. The gas pressure relief valves 17 are respectively connected to the two chambers of the sand and gravel filter 15, and the two electronic pressure gauges 16 are respectively connected to the signals of the two second pairs of clamped electric butterfly valves 14.

[0032] Well water filtration stage: insert the well water pipe 1 into the recessed well water, first open the first pair of clamped electric butterfly valves 12 at the same time, and then open the check valve 4. The water in the well enters the centrifuge 5 from the well water delivery pipe 3. Due to the different densities of sand and water, the mud, sand and gravel in the water are separated from the water under the centrifugal action of the centrifuge 5. The low-density clean water rises and is discharged from the connecting pipe 301, while the mud, sand and impurities sink into the sand tank 501. The water that has completed the first stage of sand removal enters the left and right chambers inside the sand filter 15 through the two water inlet ends of the connecting pipe 301.

[0033] Filter screen sand removal stage: After the water body that has completed the first stage of sand removal enters the left and right chambers inside the sand filter 15 through the two water inlet ends of the connecting pipe 301, as the internal pressure of the sand filter 15 increases, the water body that has completed the first stage of sand removal penetrates from the outside into the filter element 18, causing the filter element 18 to perform a secondary filtration on the water body, further filtering out impurities and silt in the water, and the water that has undergone secondary filtration is discharged through the outlet 1501.

[0034] Backwashing stage: When a large amount of silt and sewage adhere to the outside of the filter element 18, causing the filtering efficiency of the filter element 18 to decrease, the electronic pressure gauge 16 detects that the pressure in the chamber of the sand filter 15 increases. At this time, the filter element 18 needs to be backwashed. The electronic pressure first controls the first pair of clamped electric butterfly valves 12 corresponding to the chamber of the sand filter 15 with reduced filtering efficiency to close, so that the water that has been desanded in the first stage no longer enters the chamber of the sand filter 15 that needs backwashing, and starts the corresponding second pair of clamped electric butterfly valves 14. The chamber of the sand filter 15 on the other side does not need to be backwashed. At this time, a pressure difference is formed in the two cavities inside the sand filter 15, and water penetrates from the inside to the outside through the filter element 18 into the chamber of the sand filter 15 that needs backwashing , so that the sand and impurities adsorbed on the surface of the filter element 18 are separated, and the sewage is discharged through the corresponding sewage pipe 1402, so as to achieve the purpose of removing sand from the filter. At the same time, the other chamber of the sand filter 15 chamber continues to filter the water body. By repeating the above operation, the purpose of removing sand without stopping the machine is achieved, and automatic sewage discharge and sand removal are realized, so that the device can adapt to the environment of flat sand or sandy environment. When performing automatic backwashing, first set the action time of the first pair of clamped electric butterfly valves 12 and the second pair of clamped electric butterfly valves 14, so that the first pair of clamped electric butterfly valves 12 are closed at a fixed time and the corresponding second pair of clamped electric butterfly valves 14 are closed at a fixed time, so that a pressure difference is formed in the corresponding chamber of the sand filter 15, and automatic backwashing is performed at a fixed time.

[0035] Initially, water enters the two chambers of the sand filter 15, increasing the air pressure in the two chambers of the sand filter 15. When the air pressure in the chamber of the sand filter 15 reaches a certain value, the gas pressure relief valve 17 opens to discharge the air in the filter chamber to achieve the purpose of pressure relief.

[0036] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. Multi-sand centrifugal double-net fully automatic backwash filter, Features: The main body of the device is composed of four devices: a centrifugal filter device, a conveying device, a double-net filter device and a backwashing device. The conveying device connects the centrifugal filter device with the double-net filter device. The water in the well first passes through the centrifugal filter device to perform the first stage of mud, sand and gravel removal, and then is input into the double-net filter device by the conveying device to complete the second stage of impurities and residual sand and gravel removal. The double-net filter device is provided with a backwashing device for automatic sewage and sand discharge.

2. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 1, Features: The centrifugal filtering device comprises a well water pipe (1), a well water water delivery pipe (3), a check valve (4), a centrifuge (5), a sand removal tank (501), a sand removal electromagnetic valve (2) and a first bracket (502). The well water pipe (1) is butt-jointed with the well water water delivery pipe (3) through a joint, the other end of the well water water delivery pipe (3) is in communication with the centrifuge (5), and a check valve (4) is provided at one end of the well water water delivery pipe (3) close to the centrifuge (5), and the flow of water is controlled by the check valve (4). The bottom end of the centrifuge (5) is in communication with the sand removal tank (501), and the silt separated by the centrifuge (5) is collected by the sand removal tank (501), and the sand removal tank (501) is supported and fixed by the first bracket (502), and a sand removal electromagnetic valve (2) is provided on one side of the sand removal tank (501).

3. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 2, Features: The double-net filtering device comprises a sand filter (15), a second bracket (1502), a filter element (18), a partition (19), a sewage pipe (1402) and a second pair of clamped electric butterfly valves (14); the centrifuge (5) is connected and communicated with the sand filter (15) through a conveying device; a water outlet (1501) is arranged on one side of the sand filter (15); the sand filter (15) is fixedly supported by the second bracket (1502); and a filter element (18) is arranged inside the sand filter (15). The filter element (18) is connected to the water outlet (1501) of the sand and gravel filter (15). A partition (19) is provided in the middle of the sand and gravel filter (15). The partition (19) divides the interior of the sand and gravel filter (15) into two left and right chambers, and the filter element (18) passes through the partition (19). Two sewage pipes (1402) are provided at the bottom of the sand and gravel filter (15), and the ends of the two sewage pipes (1402) are connected. A second pair of clamped electric butterfly valves (14) are installed on the sewage pipes (1402).

4. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 1, Features: The conveying device comprises a connecting pipe (301), a fire-fighting clamp (6), a valve seat (7), an exhaust valve (8), a pressure gauge base (9) and a seismic-resistant pressure gauge (10); the centrifuge (5) is connected to the sand and gravel filter (15) through the connecting pipe (301); the connecting pipe (301) is fixed to the sand and gravel filter (15) through the fire-fighting clamp (6); two water inlet ends are arranged between the connecting pipe (301) and the sand and gravel filter (15); the connecting pipe (301) is provided with a valve seat (7) and a pressure gauge base (9); the valve seat (7) is provided with an exhaust valve (8); and the pressure gauge base (9) is provided with a seismic-resistant pressure gauge (10).

5. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 4, Features: The backwashing device comprises a first pair of clamped electric butterfly valves (12) and a bypass pipe (1401). The two water inlet ends of the connecting pipe (301) are both installed with the first pair of clamped electric butterfly valves (12). The two water inlet ends of the connecting pipe (301) and the two sewage pipes (1402) are connected and communicated through the two bypass pipes (1401).

6. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 3, Features: The invention also comprises an electronic pressure gauge (16) and a gas pressure relief valve (17). Two electronic pressure gauges (16) are installed on the sand filter (15). The two electronic pressure gauges (16) are respectively connected to the two chambers of the sand filter (15). Two gas pressure relief valves (17) are installed on the sand filter (15). The gas pressure relief valves (17) are respectively connected to the two chambers of the sand filter (15). The two electronic pressure gauges (16) are respectively connected to the signals of the two second pairs of clamped electric butterfly valves (14).

7. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 3, Features: It also includes a cleaning valve cover (1503). Two cleaning valve covers (1503) are arranged on the sand filter (15).

8. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 3, Features: It also includes a 304 stainless steel mesh core (13), and the water outlet (1501) of the sand and gravel filter (15) is provided with the 304 stainless steel mesh core (13).

9. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 4, Features: A fertilizer application port (11) is provided on the connecting pipe (301).

10. The multi-sand centrifugal double-net fully automatic backwash filter as claimed in claim 2, Features: It also includes a guide plate (503), and two guide plates (503) are installed inside the sand removal tank (501).

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