Pressure type automatic backwashing filtering device

Abstract

The utility model provides a pressure type automatic backwash filter device, relates to filter device technical field, including first filter box and second filter box, the inner side of first filter box and second filter box is equipped with the open slot, two open slot are equipped with the filter plate, the filter plate is equipped with the filter plate, and the filter plate is equipped with the filter plate. Mounting blocks are fixedly connected to the outer surface of the first filter box and the outer surface of the second filter box, a slot is formed in one side of one mounting block, an insertion block is fixedly connected to one side of the other mounting block, and a limiting hole is formed in the surface of the insertion block; according to the utility model, when the filter plate is detached, a pull rod is pulled, so that a sliding plate drives a limiting rod to move and is separated from a limiting hole, the limitation on an insertion block is relieved, then the insertion block is pulled out from an insertion slot, so that the first filter box and the second filter box can be separated, and then the filter plate is taken out from an open slot, so that the filter plate is convenient to replace; and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a pressure type automatic backwashing filtering device. Background Art

[0002] A filtering device is a precision device that directly intercepts impurities in water by using a filter screen, removes suspended solids and particulate matters in water body, reduces turbidity, purifies water quality, reduces the generation of system dirt, bacteria, algae, rust, etc., so as to purify water quality and protect other equipment in the system to work normally.

[0003] However, during the use of the existing filtering device, it is not convenient to disassemble the filter screen, resulting in inconvenient replacement of the filter screen and reducing the practicability of the device. Summary of the Utility Model

[0004] The utility model mainly provides a pressure type automatic backwashing filtering device that is convenient for disassembling the filter screen and replacing the filter screen.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A pressure type automatic backwashing filtering device, including a first filtering box and a second filtering box. Open slots are provided inside both the first filtering box and the second filtering box. A filter plate is arranged in the two open slots. Mounting blocks are fixedly connected to the outer surfaces of both the first filtering box and the second filtering box. A slot is provided on one side of one of the mounting blocks, and a plug is fixedly connected to one side of the other mounting block. A limiting hole is provided on the surface of the plug. Fixing shells are fixedly connected to both the top and bottom of one of the mounting blocks. A sliding plate is slidably connected inside the fixing shell. A limiting rod is fixedly connected to one side of the sliding plate, and a pull rod is fixedly connected to the other side of the sliding plate. One end of the limiting rod movably penetrates through the fixing shell and extends into the limiting hole. One end of the pull rod movably penetrates through the fixing shell, and a return spring is sleeved on the outer surface of the pull rod.

[0006] Preferably, a water inlet pipe is flange-mounted at one end of the first filtering box, and a water outlet pipe is flange-mounted at one end of the second filtering box. A first solenoid valve is arranged on the water inlet pipe, and a second solenoid valve is arranged on the water outlet pipe. When the first solenoid valve and the second solenoid valve are opened, water can normally enter the first filtering box and the second filtering box from the water inlet pipe, and after being filtered by the filter plate, it is normally discharged from the water outlet pipe.

[0007] Preferably, a water delivery pipe is welded to the water inlet pipe, and the end of the water delivery pipe away from the water inlet pipe is welded to the water outlet pipe. When the first solenoid valve and the second solenoid valve are closed, water can flow through the water delivery pipe, then flow into the second filtering box from the water outlet pipe, that is, flow reversely into the first filtering box, and then the filter plate is backwashed by the water flow pressure, which is convenient to wash off the impurities at the end of the filter plate close to the water inlet pipe.

[0008] Preferably, a third solenoid valve is provided on the water delivery pipe, a first water pressure sensor is provided in the first filter tank, a second water pressure sensor is provided in the second filter tank, a pull ring is installed at one end of the pull rod, and a first water collecting cover is provided at the bottom of the first filter tank. By providing the third solenoid valve, it is convenient to perform backwashing operations on the filter plate. The first water pressure sensor is convenient for detecting the water pressure in the first filter tank, and the second water pressure sensor detects the water pressure in the second filter tank. At the same time, the provided pull ring is convenient for pulling the pull rod, and the first water collecting cover is convenient for the concentrated discharge of the washed-off impurities.

[0009] Preferably, the bottom of the first water collecting cover is fixedly communicated with a first sewage discharge pipe, and a fourth solenoid valve is provided on the first sewage discharge pipe. By opening the fourth solenoid valve, it is convenient for the impurities washed off at the end of the filter plate close to the water inlet pipe to be discharged through the first sewage discharge pipe.

[0010] Preferably, a second water collecting cover is provided at the bottom of the second filter tank, the bottom of the second water collecting cover is fixedly communicated with a second sewage discharge pipe, a fifth solenoid valve is provided on the second sewage discharge pipe, a controller is provided on the front side of the first filter tank, and the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the first water pressure sensor and the second water pressure sensor are all electrically connected to the controller. When the pressure difference detected by the first water pressure sensor and the second water pressure sensor is greater than or equal to a preset value, at this time, the first water pressure sensor and the second water pressure sensor send signals to the controller. After receiving the signals, the controller controls the closing of the first solenoid valve and the second solenoid valve, and controls the opening of the third solenoid valve and the fourth solenoid valve, so as to facilitate the automatic backwashing of the filter plate. After backwashing the filter plate, impurities are filtered out at the end of the filter plate close to the water outlet pipe. When cleaning it, the controller controls the closing of the third solenoid valve and the fourth solenoid valve, and controls the opening of the first solenoid valve and the fifth solenoid valve, so that water normally enters the first filter tank and the second filter tank from the water inlet pipe, and then uses the water flow pressure to perform forward flushing on the impurities filtered out at the end of the filter plate close to the water outlet pipe, so that the water and impurities are concentrated into the second sewage discharge pipe through the second water collecting cover and discharged.

[0011] Preferably, a positioning groove is provided on one side of one of the mounting blocks, and a positioning block is fixedly connected to one side of the other mounting block. By inserting the positioning block on the other mounting block into the positioning groove on one of the mounting blocks, and at the same time inserting the plug into the slot, the connection tightness between the first filter tank and the second filter tank is improved.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. In the present utility model, when disassembling the filter plate, pull the pull rod, so that the sliding plate drives the limit rod to move and separate from the limit hole, thus releasing the restriction on the plug block. Then, pull out the plug block from the slot to separate the first filter box from the second filter box, and then take out the filter plate from the opening slot, which is convenient for replacing the filter plate. During installation, place the filter plate in the opening slot and pull the pull rod, so that the sliding plate drives the limit rod to move away from the slot. At the same time, the return spring starts to contract under the extrusion of the sliding plate. Then, insert the plug block on the first filter box into the corresponding slot. Next, release the pull rod. Under the elastic force of the return spring, the sliding plate drives the limit rod to squeeze into the limit hole, thereby restricting the plug block and further limiting and fixing the first filter box, completing the installation of the filter plate and improving the practicality of the device.

[0014] 2. In the present utility model, the first water pressure sensor detects the water pressure in the first filter box, and the second water pressure sensor detects the water pressure in the second filter box. When the filter plate adsorbs enough dirt to hinder the filtration process, there will be a pressure difference between the water pressures detected by the first water pressure sensor and the second water pressure sensor at this time. When the pressure difference is greater than or equal to the preset value, it indicates that the filter holes of the filter plate are relatively severely blocked. At this time, the first water pressure sensor and the second water pressure sensor send signals to the controller. After receiving the signals, the controller controls the closing of the first solenoid valve and the second solenoid valve, and controls the opening of the third solenoid valve and the fourth solenoid valve, thereby facilitating the automatic reverse flushing of the filter plate, and enabling the impurities washed off to be discharged through the first water collecting cover and then through the first sewage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional view of the main structure of a pressure type automatic backwashing filtration device proposed by the present utility model;

[0016] Figure 2 is a three-dimensional view of the sectional structure of a pressure type automatic backwashing filtration device proposed by the present utility model;

[0017] Figure 3 is a three-dimensional view of the structure of the first filter box in a pressure type automatic backwashing filtration device proposed by the present utility model;

[0018] Figure 4 is a three-dimensional view of the sectional structure of the fixed shell in a pressure type automatic backwashing filtration device proposed by the present utility model.

[0019] Legend: 1. First filter box; 2. Second filter box; 3. Open slot; 4. Filter plate; 5. Mounting block; 6. Slot; 7. Plug; 8. Limit hole; 9. Fixed housing; 10. Slide plate; 11. Limit rod; 12. Pull rod; 13. Return spring; 14. Water inlet pipe; 15. Water outlet pipe; 16. First solenoid valve; 17. Second solenoid valve; 18. Water delivery pipe; 19. Third solenoid valve; 20. First water pressure sensor; 21. Second water pressure sensor; 22. Pull ring; 23. First water collecting cover; 24. First sewage discharge pipe; 25. Fourth solenoid valve; 26. Second water collecting cover; 27. Second sewage discharge pipe; 28. Fifth solenoid valve; 29. Positioning slot; 30. Positioning block; 31. Controller. Detailed implementation

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0022] Embodiment 1: As Figure 1 - Figure 4 shown, the present invention provides a pressure type automatic backwashing filtration device, including a first filter box 1 and a second filter box 2. Open slots 3 are provided inside both the first filter box 1 and the second filter box 2. A filter plate 4 is arranged in the two open slots 3. Mounting blocks 5 are fixedly connected to the outer surfaces of both the first filter box 1 and the second filter box 2. A slot 6 is provided on one side of one of the mounting blocks 5, and a plug 7 is fixedly connected to one side of the other mounting block 5. Limit holes 8 are provided on the surface of the plug 7. Fixed housings 9 are fixedly connected to both the top and bottom of one of the mounting blocks 5. A slide plate 10 is slidably connected inside the fixed housing 9. A limit rod 11 is fixedly connected to one side of the slide plate 10, and a pull rod 12 is fixedly connected to the other side of the slide plate 10. One end of the limit rod 11 movably penetrates through the fixed housing 9 and extends into the limit hole 8, and one end of the pull rod 12 movably penetrates through the fixed housing 9. A return spring 13 is sleeved on the outer surface of the pull rod 12.

[0023] The effect achieved by the entire Embodiment 1 is that when the filter plate 4 is disassembled, the pull rod 12 is pulled, causing the pull rod 12 to drive the sliding plate 10 to slide within the fixed housing 9. The sliding plate 10 drives the limit rod 11 to move and separate from the limit hole 8, releasing the restriction on the insertion block 7. Subsequently, the insertion block 7 can be pulled out from the slot 6 to separate the first filter box 1 from the second filter box 2, and then the filter plate 4 can be taken out from the opening groove 3, facilitating the replacement of the filter plate 4. During installation, the filter plate 4 is placed in the opening groove 3, and the pull rod 12 is pulled, causing the sliding plate 10 to drive the limit rod 11 to move away from the slot 6. At the same time, the return spring 13 starts to contract under the extrusion of the sliding plate 10. Then, the insertion block 7 on the first filter box 1 is inserted into the corresponding slot 6. Next, the pull rod 12 is released. Under the elastic force of the return spring 13, the sliding plate 10 drives the limit rod 11 to squeeze into the limit hole 8, thereby restricting the insertion block 7 and further limiting and fixing the first filter box 1, completing the installation of the filter plate 4 and improving the practicality of the device.

[0024] Embodiment 2: As Figure 1 - Figure 4 shown, a water inlet pipe 14 is flange-mounted at one end of the first filter box 1, and a water outlet pipe 15 is flange-mounted at one end of the second filter box 2. A first solenoid valve 16 is provided on the water inlet pipe 14, and a second solenoid valve 17 is provided on the water outlet pipe 15. A water delivery pipe 18 is welded to the water inlet pipe 14, and the end of the water delivery pipe 18 away from the water inlet pipe 14 is welded to the water outlet pipe 15. A third solenoid valve 19 is provided on the water delivery pipe 18. A first water pressure sensor 20 is provided inside the first filter box 1, and a second water pressure sensor 21 is provided inside the second filter box 2. A pull ring 22 is installed at one end of the pull rod 12. A first water collecting cover 23 is provided at the bottom of the first filter box 1, and a first sewage discharge pipe 24 is fixedly connected to the bottom of the first water collecting cover 23. A fourth solenoid valve 25 is provided on the first sewage discharge pipe 24. A second water collecting cover 26 is provided at the bottom of the second filter box 2, and a second sewage discharge pipe 27 is fixedly connected to the bottom of the second water collecting cover 26. A fifth solenoid valve 28 is provided on the second sewage discharge pipe 27. A controller 31 is provided on the front side of the first filter box 1. The first solenoid valve 16, the second solenoid valve 17, the third solenoid valve 19, the fourth solenoid valve 25, the fifth solenoid valve 28, the first water pressure sensor 20, and the second water pressure sensor 21 are all electrically connected to the controller 31. A positioning groove 29 is formed on one side of one of the mounting blocks 5, and a positioning block 30 is fixedly connected to one side of the other mounting block 5.

[0025] The effect achieved by the entire Embodiment 2 is as follows. When the first solenoid valve 16 and the second solenoid valve 17 are opened while the third solenoid valve 19 is closed, water can normally enter the first filter tank 1 and the second filter tank 2 from the water inlet pipe 14. After being filtered by the filter plate 4, it is then normally discharged through the water outlet pipe 15. When the filter plate 4 adsorbs enough dirt to hinder the filtration process, the first solenoid valve 16 and the second solenoid valve 17 can be closed, and the third solenoid valve 19 can be opened. At this time, water can flow through the water delivery pipe 18 and then flow into the second filter tank 2 through the water outlet pipe 15, that is, it reversely enters the first filter tank 1. Then, the water flow pressure is used to reversely flush the filter plate 4, which is convenient for flushing off the impurities at the end of the filter plate 4 close to the water inlet pipe 14. The first water pressure sensor 20 is used to detect the water pressure in the first filter tank 1, and the second water pressure sensor 21 is used to detect the water pressure in the second filter tank 2. When the filter plate 4 adsorbs enough dirt to hinder the filtration process, there will be a pressure difference between the water pressures detected by the first water pressure sensor 20 and the second water pressure sensor 21 at this time. When the pressure difference is greater than or equal to the preset value, it indicates that the filter holes of the filter plate 4 are severely blocked. At this time, the first water pressure sensor 20 and the second water pressure sensor 21 send signals to the controller 31. After receiving the signals, the controller 31 controls the closing of the first solenoid valve 16 and the second solenoid valve 17, and controls the opening of the third solenoid valve 19 and the fourth solenoid valve 25, so as to facilitate the automatic reverse flushing of the filter plate 4, enabling the flushed-off impurities to be discharged through the first water collecting cover 23 and then through the first sewage discharge pipe 24. After the filter plate 4 is reversely flushed, there are impurities filtered out at the end of the filter plate 4 close to the water outlet pipe 15. When cleaning them, the controller 31 controls the closing of the third solenoid valve 19 and the fourth solenoid valve 25, and controls the opening of the first solenoid valve 16 and the fifth solenoid valve 28, so that water normally enters the first filter tank 1 and the second filter tank 2 from the water inlet pipe 14. Then, the water flow pressure is used to forward flush the impurities filtered out at the end of the filter plate 4 close to the water outlet pipe 15, enabling the water and impurities to be concentrated and enter the second sewage discharge pipe 27 through the second water collecting cover 26 and be discharged. Finally, the controller 31 controls the closing of the fifth solenoid valve 28 and the opening of the second solenoid valve 17, so that the water filtered by the filter plate 4 continues to be normally discharged through the water outlet pipe 15. By inserting the positioning block 30 on the first filter tank 1 into the positioning groove 29 on the second filter tank 2, and at the same time inserting the insertion block 7 into the insertion slot 6, the connection tightness between the first filter tank 1 and the second filter tank 2 is improved.

[0026] Working principle: When in use, when the controller 31 controls the first solenoid valve 16 and the second solenoid valve 17 to open and controls the third solenoid valve 19 to close, water can normally enter the first filter tank 1 and the second filter tank 2 from the water inlet pipe 14 at this time. After being filtered by the filter plate 4, it is then normally discharged through the water outlet pipe 15. At the same time, the first water pressure sensor 20 detects the water pressure in the first filter tank 1, and the second water pressure sensor 21 detects the water pressure in the second filter tank 2. When the filter plate 4 adsorbs enough dirt and hinders the filtration process, there will be a pressure difference between the water pressures detected by the first water pressure sensor 20 and the second water pressure sensor 21 at this time. When the pressure difference is greater than or equal to the preset value, it indicates that the filter holes of the filter plate 4 are blocked relatively seriously. At this time, the first water pressure sensor 20 and the second water pressure sensor 21 send signals to the controller 31. After receiving the signals, the controller 31 controls the first solenoid valve 16 and the second solenoid valve 17 to close, and controls the third solenoid valve 19 and the fourth solenoid valve 25 to open. At this time, water can flow through the water delivery pipe 18 and then flow into the second filter tank 2 through the water outlet pipe 15, that is, it enters the first filter tank 1 in the reverse direction. Then, the filter plate 4 is reversely flushed by the water flow pressure, and the impurities at the end of the filter plate 4 close to the water inlet pipe 14 are flushed off and fall off. The flushed-off impurities are discharged through the first water collecting cover 23 and then through the first sewage discharge pipe 24. Then, after the filter plate 4 is reversely flushed, there are impurities filtered out at the end of the filter plate 4 close to the water outlet pipe 15. When cleaning it, the controller 31 controls the third solenoid valve 19 and the fourth solenoid valve 25 to close, and controls the first solenoid valve 16 and the fifth solenoid valve 28 to open, so that water normally enters the first filter tank 1 and the second filter tank 2 from the water inlet pipe 14. Then, the impurities filtered out at the end of the filter plate 4 close to the water outlet pipe 15 are flushed forward by the water flow pressure, so that the water and the impurities are concentrated into the second sewage discharge pipe 27 through the second water collecting cover 26 and discharged. Finally, the controller 31 controls the fifth solenoid valve 28 to close and the second solenoid valve 17 to open, so that the water filtered by the filter plate 4 continues to be normally discharged through the water outlet pipe 15. When the filter plate 4 needs to be disassembled, the flange-mounted water inlet pipe 14 and water outlet pipe 15 can be disassembled first. Then, pull the pull ring 22, so that the pull rod 12 drives the sliding plate 10 to slide in the fixed housing 9. The sliding plate 10 drives the limiting rod 11 to move and separate from the limiting hole 8, so that the restriction on the inserting block 7 is released. Then, the inserting block 7 and the positioning block 30 can be pulled out from the inserting slot 6 and the positioning slot 29 to separate the first filter tank 1 and the second filter tank 2. Then, the filter plate 4 can be taken out from the opening slot 3, which is convenient for replacing the filter plate 4. When installing, place the filter plate 4 in the opening slot 3 and pull the pull ring 22, so that the sliding plate 10 drives the limiting rod 11 to move away from the inserting slot 6. At the same time, the return spring 13 starts to contract under the extrusion of the sliding plate 10. Then, insert the positioning block 30 on the first filter tank 1 into the positioning slot 29 on the second filter tank 2, and at the same time insert the inserting block 7 into the inserting slot 6. Then, release the pull rod 12. Under the elastic force of the return spring 13, the sliding plate 10 drives the limiting rod 11 to squeeze into the limiting hole 8.Thereby, the insertion block 7 is restricted, and further, the first filter box 1 is position-limited and fixed, completing the installation of the filter plate 4 and improving the practicability of the device.

[0027] The above are only the preferred embodiments of the present invention, and do not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A pressure-type automatic backwashing filter device, comprising a first filter box (1) and a second filter box (2), characterized in that: The first filter box (1) and the second filter box (2) are each provided with an open groove (3) on their inner sides, and filter plates (4) are arranged in the two open grooves (3). The outer surfaces of the first filter box (1) and the second filter box (2) are both fixedly connected with mounting blocks (5), one side of which is provided with a slot (6), and one side of the other mounting block (5) is fixedly connected with an insert block (7), and a limiting hole (8) is provided on the surface of the insert block (7). The top and bottom of one of the mounting blocks (5) are both fixedly connected with a fixed shell (9), and a slide plate (10) is slidably connected in the fixed shell (9). One side of the slide plate (10) is fixedly connected with a limiting rod (11), and the other side of the slide plate (10) is fixedly connected with a pull rod (12), one end of the limiting rod (11) movably passes through the fixed shell (9) and extends into the limiting hole (8), one end of the pull rod (12) movably passes through the fixed shell (9), and a return spring (13) is sleeved on the outer surface of the pull rod (12).

2. A pressure-type automatic backwashing filter device according to claim 1, characterized in that: A water inlet pipe (14) is installed on a flange at one end of the first filter box (1), a water outlet pipe (15) is installed on a flange at one end of the second filter box (2), a first solenoid valve (16) is provided on the water inlet pipe (14), and a second solenoid valve (17) is provided on the water outlet pipe (15).

3. A pressure-type automatic backwashing filter device according to claim 2, characterized in that: A water delivery pipe (18) is welded to the water inlet pipe (14), and one end of the water delivery pipe (18) away from the water inlet pipe (14) is welded to the water outlet pipe (15).

4. A pressure-type automatic backwashing filter device according to claim 3, characterized in that: A third solenoid valve (19) is provided on the water delivery pipe (18), a first water pressure sensor (20) is provided in the first filter box (1), a second water pressure sensor (21) is provided in the second filter box (2), a pull ring (22) is installed at one end of the pull rod (12), and a first water collecting cover (23) is provided at the bottom of the first filter box (1).

5. A pressure-type automatic backwashing filter device according to claim 4, characterized in that: The bottom of the first water collecting cover (23) is fixedly connected to a first sewage discharge pipe (24), and a fourth solenoid valve (25) is provided on the first sewage discharge pipe (24).

6. A pressure-type automatic backwashing filter device according to claim 5, characterized in that: A second water collecting cover (26) is arranged at the bottom of the second filter box (2); a second sewage discharge pipe (27) is fixedly connected to the bottom of the second water collecting cover (26); a fifth solenoid valve (28) is arranged on the second sewage discharge pipe (27); a controller (31) is arranged on the front side of the first filter box (1); the first solenoid valve (16), the second solenoid valve (17), the third solenoid valve (19), the fourth solenoid valve (25), the fifth solenoid valve (28), the first water pressure sensor (20) and the second water pressure sensor (21) are all electrically connected to the controller (31).

7. A pressure-type automatic backwashing filter device according to claim 1, characterized in that: A positioning groove (29) is provided on one side of one of the mounting blocks (5), and a positioning block (30) is fixedly connected to one side of the other mounting block (5).

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