Chemical water treatment security filter backwash device

Abstract

The application discloses a kind of chemical water security filter backwash device, including filter main body, fixedly connected with liquid inlet pipe, liquid outlet pipe, cleaning pipe, blowdown pipe and electromagnetic valve, filter screen is fixedly connected with filter main body, filter tube is sealed with filter main body Clamping, detection module includes arc disc, extension pipe and with sealed tube, pressure sensor and contact sensor are fixedly connected in sealed tube, pressure sensor is elastically connected with electromagnet two, sealed tube is fixedly connected with electromagnet one, contact sensor is electrically connected with electromagnetic valve, arc disc is contacted with the upper end of filter tube and moves synchronously with electromagnet two, and arc disc is located in extension pipe;Through gravity and electromagnetic force cancellation's suspended decoupling state, amplify water body small flow fluctuation's displacement response to arc disc, then accurately perceive the blockage of each filter tube, determine the blockage degree of this filter tube by pressure sensor, avoid being unable to locate defective filter tube, filter tube and sealed detection component can be quickly and independently replaced.

Description

Technical Field

[0001] This invention relates to the field of security filter technology, specifically to a backwashing device for a chemical water treatment security filter. Background Technology

[0002] In the field of industrial water treatment, security filters serve as a protective barrier for precision systems such as reverse osmosis, undertaking the crucial task of removing tiny particles, colloids, and broken filter media from the water.

[0003] Traditional security filters typically consist of a cylindrical body, a high-flow-rate pleated filter element, and inlet / outlet pipelines. Their clogging status is mostly determined by detecting the overall pressure difference between the filter's inlet and outlet to judge the degree of contamination. However, this method cannot accurately pinpoint the clogging status of a specific filter element. Often, the abnormality can only be detected when the system resistance increases significantly. Furthermore, localized clogging can easily lead to a decrease in the overall performance of the machine. That is, when internal clogging is detected, traditional devices cannot identify which specific filter element is blocked, and therefore cannot replace it specifically. Instead, the entire filter must be replaced, which is not convenient for quick use. Summary of the Invention

[0004] The purpose of this invention is to provide a backwashing device for a chemical water purification security filter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a backwashing device for a chemical water purification security filter, comprising... The filter body is fixedly connected to an inlet pipe, an outlet pipe, a cleaning pipe, a drain pipe, and a solenoid valve; The filter screen is fixedly connected to the filter body for the first filtration. The filter tube is sealed and snapped into the filter body for secondary filtration. The detection module includes an arc-shaped disc, an extension tube, and a sealing tube. A pressure sensor and a contact sensor are fixedly connected inside the sealing tube. The pressure sensor is elastically connected to an electromagnet two. An electromagnet one is fixedly connected to the sealing tube. The contact sensor is electrically connected to a solenoid valve. The arc-shaped disc contacts the upper end of the filter tube and moves synchronously with the electromagnet two. The arc-shaped disc is located inside the extension tube. The bottom end of the sealing tube is sealed with a limiting plate that is fixedly connected to the filter body. One end of the outlet tube is located at the bottom of the filter body, and the other end is higher than the limiting plate.

[0006] Preferably, the top of the filter body is sealed and hinged with a top cover, and a slot is opened at the top of the filter body. The output end of the liquid inlet pipe is fixedly connected to the bottom side of the filter body, and the input end of the sewage discharge pipe is fixedly connected to the bottom of the filter body. The filter body is provided with a chuck, a limiting plate and a filter screen in sequence from top to bottom.

[0007] Preferably, the outer side of the chuck is sealed and engaged with the chuck groove, while the surface is in close contact with the top cover. The limiting plate is fixedly connected to the inner wall of the filter body. One end of the liquid outlet pipe is located at the bottom of the filter body and its surface is fixedly connected to the output end of the cleaning pipe, and the two are connected. The other end of the liquid outlet pipe goes straight upward and passes through the filter body, the filter screen and the limiting plate in sequence. The liquid outlet pipe is fixedly connected to the filter screen and the limiting plate.

[0008] Preferably, the surface of the limiting plate is fixedly connected with a plurality of evenly arranged threaded tubes, and the surface of the limiting plate is provided with a plurality of evenly arranged limiting grooves. The limiting grooves are coaxial with the threaded tubes. The extension tube is threadedly connected to the threaded tubes. The end of the extension tube away from the threaded tube is fixedly connected to a connecting rod, and the connecting rod is fixedly connected to the sealing tube.

[0009] Preferably, the filter tubes are provided in a plurality of manner, with a limiting ring fixedly connected to the upper end of the filter tube, the limiting ring being sealed and inserted into the limiting groove, and the lower end of the extension tube contacting the limiting ring.

[0010] Preferably, the lower end of the guide rod is fixedly connected to the arc-shaped disk, and the other end passes through the bottom of the sealing tube and is fixedly connected to the second electromagnet. The guide rod is slidably connected to the sealing tube. A spring is sleeved on the surface of the guide rod. One end of the spring is fixedly connected to the pressure sensor, and the other end is fixedly connected to the second electromagnet. The pressure sensor is fixedly connected to the bottom end of the inner wall of the sealing tube.

[0011] Preferably, electromagnet one is fixedly connected to the top of the inner wall of the sealing tube, electromagnet two is slidably connected to the sealing tube, electromagnet one, electromagnet two, guide rod and filter tube are coaxially arranged, and the contact sensor is located between electromagnet one and electromagnet two.

[0012] Preferably, the sealing tube is in sealed contact with the chuck via a convex ring at the bottom, and the inlet pipe, outlet pipe, and drain pipe are all fixedly connected to solenoid valves, wherein the solenoid valve connected to the drain pipe is electrically connected to the pressure sensor. Compared with the prior art, the beneficial effects of the present invention are: 1. By passing a balanced current through electromagnet one and electromagnet two inside the sealed tube, an electromagnetic attraction force is generated to counteract the spring tension and the gravity of components such as the arc-shaped disk, so that the arc-shaped disk and guide rod are in a suspended decoupled state where gravity and electromagnetic force cancel each other out. This amplifies the displacement response of the arc-shaped disk to small flow fluctuations in the water body, thereby accurately sensing the blockage of each filter tube. 2. Set a corresponding pressure sensor for each filter tube. When a filter tube gradually becomes clogged, the impact kinetic energy of the water flowing through the filter tube on the arc-shaped disc decreases, and the spring tension changes synchronously. Based on this, the pressure sensor independently calculates the ratio of the current force value to the reference force value when the filter tube is clean, and then judges the degree of clogging of the filter tube, thus avoiding the situation where defective filter tubes cannot be located. 3. Through the detachable threaded structure of the extension tube and the threaded tube, and the chuck sealing limit design, the single filter tube and sealing detection components can be quickly and independently replaced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the filter body of the present invention; Figure 3 This is a schematic diagram of the limiting disk structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the sealing tube of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure of region A in the middle; Figure 6 This is a schematic diagram of the threaded tube structure of the present invention.

[0014] In the diagram: 1. Filter body; 11. Top cover; 12. Slot; 13. Inlet pipe; 14. Outlet pipe; 15. Cleaning pipe; 16. Drain pipe; 17. Solenoid valve; 2. Filter screen; 3. Filter tube; 4. Limiting plate; 5. Chuck; 6. Threaded pipe; 7. Detection module; 71. Sealing pipe; 72. Connecting rod; 73. Extension pipe; 74. Arc-shaped plate; 75. Guide rod; 76. Spring; 77. Electromagnet one; 78. Electromagnet two; 79. Pressure sensor; 710. Contact sensor; 8. Limiting groove; 9. Limiting ring. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-6This invention provides a technical solution: a backwashing device for a chemical water purification security filter, comprising a filter body 1, which is fixedly connected to an inlet pipe 13, an outlet pipe 14, a cleaning pipe 15, a drain pipe 16, and a solenoid valve 17. A filter screen 2 is fixedly connected to the filter body 1 for the first filtration, through which the liquid can be coarsely filtered. A filter tube 3 is sealed and snapped to the filter body 1, facilitating disassembly and replacement, through which the liquid can be finely filtered a second time. A detection module 7 is used to detect the blockage of the filter tube 3, which mainly includes an arc-shaped disc 74, an extension tube 73, and a sealing tube 71. A pressure sensor 79 and a contact sensor are fixedly connected inside the sealing tube 71. The filter 710 has a pressure sensor 79 that is elastically connected to an electromagnet 78, a sealing tube 71 that is fixedly connected to an electromagnet 77, a contact sensor 710 that is electrically connected to a solenoid valve 17, and the contact sensor 710 controls the opening and closing of the corresponding solenoid valve 17. The arc-shaped plate 74 is in contact with the upper end of the filter tube 3 and moves synchronously with the electromagnet 78. The arc-shaped plate 74 is located inside the extension tube 73 and is shaped like an inverted bowl to increase the impact force of the water flow. The bottom end of the sealing tube 71 is sealed with a limiting plate 4 that is fixedly connected to the filter body 1. One end of the outlet pipe 14 is located at the bottom of the filter body 1, and the other end is higher than the limiting plate 4 to facilitate the rapid flow of liquid.

[0017] The top of the filter body 1 is sealed and hinged with a top cover 11, which can be quickly opened by rotating the top cover 11. At the same time, the filter body 1 and the top cover 11 can be locked by conventional electromagnetic locks after they are fastened together. The top of the filter body 1 has a slot 12. The output end of the liquid inlet pipe 13 is fixedly connected to and passes through the bottom side of the filter body 1. The input end of the liquid inlet pipe 13 is connected to the pre-filter. The input end of the sewage pipe 16 is fixedly connected to the bottom of the filter body 1, and its output end is connected to the sewage treatment device, etc. Inside the filter body 1, from top to bottom, there are a chuck 5, a limiting plate 4 and a filter screen 2. The distance between the chuck 5 and the limiting plate 4 is less than the distance between the limiting plate 4 and the filter screen 2.

[0018] The outer side of the chuck 5 is sealed and engaged with the slot 12, and a sealing ring is provided at the connection point. Simultaneously, the surface of the chuck 5 is in close contact with the lower side of the top cover 11. The top cover 11 can limit the chuck 5 to prevent it from sliding. The limiting plate 4 is fixedly connected to the inner wall of the filter body 1. One end of the outlet pipe 14 is located at the bottom of the filter body 1 and its surface is fixedly connected to the output end of the cleaning pipe 15. Thus, the filtration and rinsing can be changed by switching the solenoid valve 17 on and off. The outlet pipe 14 and the cleaning pipe 15 are connected. The other end of the outlet pipe 14 passes directly upwards through the filter body 1, the filter screen 2, and... The limiting plate 4, the liquid outlet pipe 14 and the filter screen 2 are fixedly connected to the limiting plate 4 to fix the liquid outlet pipe 14. Several evenly arranged threaded pipes 6 are fixedly connected to the surface of the limiting plate 4. Several evenly arranged limiting grooves 8 are opened on the surface of the limiting plate 4. The limiting grooves 8 are coaxial with the threaded pipes 6. The extension pipe 73 is threadedly connected to the threaded pipes 6. The two can be quickly disassembled and assembled by rotating the extension pipe 73. The end of the extension pipe 73 away from the threaded pipe 6 is fixedly connected to the connecting rod 72. The connecting rod 72 is fixedly connected to the sealing pipe 71. At this time, the sealing pipe 71 can be removed simultaneously by disassembling the extension pipe 73.

[0019] Several filter tubes 3 are provided. The upper end of the filter tube 3 is fixedly connected to a limiting ring 9, which can fix the filter tube 3. The limiting ring 9 is sealed and inserted into the limiting groove 8. A sealing rubber ring is provided at the connection. The lower end of the extension tube 73 contacts the limiting ring 9, thereby squeezing the limiting ring 9 to prevent it from shifting. The lower end of the guide rod 75 is fixedly connected to the arc-shaped disk 74, and the other end passes through the bottom of the sealing tube 71 and is fixedly connected to the electromagnet 78. The guide rod 75 is sealed and slidably connected to the sealing tube 71. When the arc-shaped disk 74 is impacted by water, the guide rod 75 will move upward synchronously under pressure. A spring 76 is sleeved on the surface of the guide rod 75. One end of the spring 76 is fixedly connected to the pressure sensor 79, and the other end is fixedly connected to the electromagnet 78. The elastic force of the spring 76 can ensure that the arc-shaped disk 74 and the filter tube 3 remain in contact. The pressure sensor 79 is fixedly connected to the bottom end of the inner wall of the sealing tube 71. The pressure sensor 79 can monitor the change in the elastic force.

[0020] The pressure sensor 79 can detect the elastic force applied to it by the spring 76. When the filter tube 3 gradually becomes clogged, the impact kinetic energy of the water flow on the arc-shaped disk 74 decreases, the tension of the spring 76 decreases, and the force value measured by the pressure sensor 79 decreases accordingly. Then, by calculating the ratio of the current force value to the initial reference force value when the filter tube 3 is clean, the degree of clogging of the filter tube 3 can be determined.

[0021] Electromagnet 1 77 is fixedly connected to the top of the inner wall of sealing tube 71, and electromagnet 2 78 is slidably connected to sealing tube 71. Electromagnet 1 77, electromagnet 2 78, guide rod 75 and filter tube 3 are coaxially arranged. The attraction between electromagnet 1 77 and electromagnet 2 78 can be changed by sliding electromagnet 2 78. Contact sensor 710 is located between electromagnet 1 77 and electromagnet 2 78. Contact sensor 710 can check whether the backwashing conditions have been met. Sealing tube 71 is in sealed contact with chuck 5 through the bottom convex ring. Solenoid valve 17 is fixedly connected to inlet pipe 13, outlet pipe 14 and drain pipe 16 to control the opening and closing of each pipe individually. Solenoid valve 17 connected to drain pipe 16 is electrically connected to pressure sensor 79 to start backwashing operation.

[0022] In actual use, before filtration, a balancing current is passed through electromagnet 77 and electromagnet 78. The electromagnetic attraction between them precisely counteracts the gravity of spring 76 and other components such as the arc-shaped disk 74. At this time, by passing a balancing current through electromagnet 77 and electromagnet 78, the arc-shaped disk 74 and guide rod 75 can be in a suspended and decoupled state where gravity and electromagnetic force cancel each other out. At this time, the filter tube 3 only bears the impact force of water flow in addition to the microgravity of the arc-shaped disk 74 itself, thereby eliminating the shielding effect of mechanical pre-pressure on the filter holes at the top of the filter tube 3, and causing the arc-shaped disk 74 to shift. The response is determined solely by the dynamic impact force of the water flow, thus maintaining high sensitivity and amplifying the displacement response of small flow fluctuations in the water body to the arc-shaped disk 74. During normal filtration, water enters the filter body 1 from the output end of the inlet pipe 13. At this time, the water level in the filter body 1 rises rapidly and passes through the filter screen 2. The water undergoes coarse filtration as it passes through the filter screen 2, thereby removing large suspended solids and broken filter media from the water. The water level continues to rise and passes through the filter pipe 3, thereby removing small particles, colloids, and microparticles from the water. Biological substances are filtered out. The water, after secondary filtration, rises with the water network to the top of filter tube 3 and impacts the arc-shaped disk 74. When the water accumulates enough pressure within the filter body 1, it pushes the arc-shaped disk 74, causing the guide rod 75 to slide upwards. At this time, electromagnet 78 moves upwards, and the tension of spring 76 changes. When the water level overflows the extension pipe 73, it collects in the middle outlet pipe 14 and flows out from the output end of the outlet pipe 14, thus completing the filtration. During the filtration process, pressure sensor 79... The monitoring readings will remain within a stable range. When the filter screen 2 is severely clogged, the overall impact pressure of the water flow on the arc-shaped disk 74 decreases. At this time, the overall monitoring reading range of the pressure sensor 79 decreases. When the reading range of one pressure sensor 79 is significantly lower than that of the other pressure sensors 79, it means that the filter tube 3 of the corresponding pressure sensor 79 is clogged. At this time, it can be replaced. When the filter tube 3 is broken, the force on the arc-shaped disk 74 will suddenly increase. At this time, the reading range of the pressure sensor 79 will be significantly greater than the monitoring index of the other pressure sensors 79.

[0023] When it is necessary to replace part of the filter tube 3, stop the water supply and open the top cover 11. Then the chuck 5 can be taken out. At this time, rotate the extension tube 73 corresponding to the filter tube 3 to disengage it from the threaded tube 6, so that the filter tube 3 can be taken out and replaced.

[0024] When filter screen 2 or filter tube 3 is clogged, backwashing can be performed. At this time, the end of the outlet pipe 14 and the inlet pipe 13 are closed by solenoid valve 17. At this time, electromagnets 77 and 78 are simultaneously supplied with equal current, generating attraction between them. This causes electromagnet 78 to move upwards, disengaging the arc-shaped disk 74 from the upper end of filter tube 3. By opening the solenoid valve 17 fixedly connected to the cleaning pipe 15, water is pumped into the filter body 1. The water level gradually rises and fills the inner cavity of the filter body. After filling, pressure is continued to be applied. Since the sealed tube 71 is empty, the water level inside the filter body gradually rises, causing the arc-shaped disk 74 to slide upwards under pressure. This causes electromagnet 78 to move upwards and contact the contact sensor 710, triggering it. The contact sensor 710 can only open the solenoid valve 17 and cannot actively close it. When all contact sensors 710 are in contact, it indicates that each filter... With all pipes 3 open and water pressure within acceptable limits, the system determines that all filter pipes 3 are ready for rinsing. The controller then issues a backwash command, opening the solenoid valve 17 of the drain valve and simultaneously increasing the current flowing through electromagnets 77 and 78. This ensures that electromagnet 78 remains in constant contact with the contact sensor 710 during backwashing. The pressurized water then rinses the residue on the inlet filter pipes 3 and filter screen 2, ultimately draining through the drain pipe 16. During this process, because the arc-shaped disk 74 is an inverted bowl shape, a gradually narrowing annular channel is formed between its outer curved surface and the inner wall of the extension pipe 73. The rinsing water flow increases velocity through this channel, and the dynamic pressure is concentrated on the outer surface of the arc-shaped disk 74, amplifying the change in water flow pressure and thus improving the rinsing effect on the filter screen 2 and filter pipes 3. After 30 seconds of rinsing, the current of the electromagnets gradually decreases, and under the tension of the spring 76, the arc-shaped disk 74 reattaches to the upper end of the filter pipe 3, completing its reset.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backwashing device for a chemical water purification security filter, characterized in that: include The filter body (1) is fixedly connected with an inlet pipe (13), an outlet pipe (14), a cleaning pipe (15), a drain pipe (16) and a solenoid valve (17). The filter screen (2) is fixedly connected to the filter body (1) for the first filtration; The filter tube (3) is sealed and snapped into the filter body (1) for a second filtration. The detection module (7) includes an arc-shaped disk (74), an extension tube (73) and a sealing tube (71). A pressure sensor (79) and a contact sensor (710) are fixedly connected inside the sealing tube (71). The pressure sensor (79) is elastically connected to an electromagnet (78). An electromagnet (77) is fixedly connected to the sealing tube (71). The contact sensor (710) is electrically connected to the solenoid valve (17). The arc-shaped disk (74) contacts the upper end of the filter tube (3) and moves synchronously with the electromagnet (78). The arc-shaped disk (74) is located inside the extension tube (73). The bottom end of the sealing tube (71) is sealed and connected to a limiting plate (4) that is fixedly connected to the filter body (1). One end of the outlet tube (14) is located at the bottom of the filter body (1), and the other end is higher than the limiting plate (4).

2. The backwashing device for a chemical water purification security filter according to claim 1, characterized in that: The top of the filter body (1) is sealed and hinged with a top cover (11). A slot (12) is opened at the top of the filter body (1). The output end of the liquid inlet pipe (13) is fixedly connected to the bottom side of the filter body (1). The input end of the sewage pipe (16) is fixedly connected to the bottom of the filter body (1). The filter body (1) is provided with a chuck (5), a limiting plate (4) and a filter screen (2) from top to bottom.

3. The backwashing device for a chemical water purification security filter according to claim 1, characterized in that: The outer side of the chuck (5) is sealed and engaged with the slot (12), while the surface is in close contact with the top cover (11). The limiting plate (4) is fixedly connected to the inner wall of the filter body (1). One end of the outlet pipe (14) is located at the bottom of the filter body (1) and its surface is fixedly connected to the output end of the cleaning pipe (15). The two are connected. The other end of the outlet pipe (14) goes straight upward through the filter body (1), the filter screen (2) and the limiting plate (4) in sequence. The outlet pipe (14) is fixedly connected to the filter screen (2) and the limiting plate (4).

4. The backwashing device for a chemical water purification security filter according to claim 1, characterized in that: The surface of the limiting plate (4) is fixedly connected with several evenly arranged threaded tubes (6), and the surface of the limiting plate (4) is provided with several evenly arranged limiting grooves (8). The limiting grooves (8) are coaxial with the threaded tubes (6), the extension tube (73) is threadedly connected to the threaded tubes (6), and the end of the extension tube (73) away from the threaded tubes (6) is fixedly connected to a connecting rod (72). The connecting rod (72) is fixedly connected to the sealing tube (71).

5. The backwashing device for a chemical water purification security filter according to claim 4, characterized in that: The filter tube (3) is provided in several parts. The upper end of the filter tube (3) is fixedly connected to a limiting ring (9). The limiting ring (9) is sealed and inserted into the limiting groove (8). The lower end of the extension tube (73) is in contact with the limiting ring (9).

6. The backwashing device for a chemical water purification security filter according to claim 1, characterized in that: The lower end of the guide rod (75) is fixedly connected to the arc-shaped disk (74), and the other end passes through the bottom of the sealing tube (71) and is fixedly connected to the electromagnet (78). The guide rod (75) and the sealing tube (71) are in a sealed sliding connection. A spring (76) is sleeved on the surface of the guide rod (75). One end of the spring (76) is fixedly connected to the pressure sensor (79), and the other end is fixedly connected to the electromagnet (78). The pressure sensor (79) is fixedly connected to the bottom of the inner wall of the sealing tube (71).

7. The backwashing device for a chemical water purification security filter according to claim 6, characterized in that: The electromagnet one (77) is fixedly connected to the top of the inner wall of the sealing tube (71), and the electromagnet two (78) is slidably connected to the sealing tube (71). The electromagnet one (77), the electromagnet two (78), the guide rod (75) and the filter tube (3) are coaxially arranged, and the contact sensor (710) is located between the electromagnet one (77) and the electromagnet two (78).

8. The backwashing device for a chemical water purification security filter according to claim 1, characterized in that: The sealing tube (71) is in sealed contact with the chuck (5) through the bottom protrusion ring. The inlet pipe (13), outlet pipe (14) and drain pipe (16) are all fixedly connected with solenoid valves (17), among which the solenoid valve (17) connected to the drain pipe (16) is electrically connected to the pressure sensor (79).

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