Sewage tank with multi-stage treatment function

Abstract

The invention relates to the technical field of sewage treatment, and discloses a sewage tank with a multi-stage treatment function, the sewage tank comprises a bottom tank body, the top of the bottom tank body is sequentially and detachably provided with a middle-layer tank body and a water outlet tank, the exterior of the bottom tank body is fixedly connected with a water inlet pipe, the exterior of the water outlet tank is fixedly connected with a water outlet pipe, and the top of the bottom tank body is provided with a flow guide valve plate; by means of the outer convex holes in the outer portion of the inner positioning pipe, when the inner positioning pipe is sleeved with the filtering film, the surface of the filtering film is in an uneven shape, so that flowing water flow can enter the inner positioning pipe more easily through the filtering film, the filtering efficiency is effectively improved, the outer convex holes face downwards, and opening openings are in a horizontal state; therefore, when the filter membrane is sleeved outside the outer convex hole, the filter membrane at the opening hole belongs to the filter main body part, and the outer membrane body at the opening hole is designed downwards, so that pollution impurities are not easy to adhere to the opening hole, and the filtering effect is further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sewage tank with multi-stage treatment functions. Background Art

[0002] In daily life, a large amount of sewage is usually generated. In order to avoid environmental pollution caused by direct discharge of sewage, it is usually necessary to purify the sewage before discharge. In order to improve the utilization efficiency of water resources, daily sewage will be further purified at multiple levels in life so that the treated sewage can be used again for daily needs, such as using purified sewage to flush toilets.

[0003] The existing domestic sewage multi-stage purification device usually purifies sewage by setting up multiple filter components to build a multiple filter system, and then regularly replacing the filter components to complete the maintenance and update of the sewage purification device. However, the primary filter device is low in price and low in replacement cost, while the advanced membrane filter components are expensive, so the frequent replacement of membrane filter components greatly increases the sewage purification cost, and the replacement of the filter components can only be replaced according to the use interval, not according to the actual filtering situation, which reduces the practicality of the existing sewage purification device. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a sewage tank with a multi-stage treatment function, which has the advantages of facilitating automatic monitoring and automatic cleaning of a membrane filtration system and effectively reducing the cost of sewage purification.

[0005] To achieve the above object, the present invention provides the following technical solutions: A sewage tank with multi-stage treatment function, comprising a bottom tank body, a middle tank body and a water outlet tank are detachably mounted on the top of the bottom tank body in sequence, a water inlet pipe is fixedly connected to the outside of the bottom tank body, a water outlet pipe is fixedly connected to the outside of the water outlet tank, a guide valve plate is arranged on the top of the bottom tank body, the middle tank body is laminated on the top of the guide valve plate, a filter residue collection chamber is fixedly connected to the outside of the middle tank body, and a slag discharge pipe is fixedly connected to the outside of the filter residue collection chamber; A membrane filtration mechanism is arranged inside the middle tank body, and the membrane filtration mechanism is used to perform membrane filtration treatment on sewage. The filtered sewage enters the water outlet tank and is discharged through the water outlet pipe.

[0006] Preferably, a filter screen and an adsorption layer are arranged inside the bottom tank body, the adsorption layer is arranged between the filter screen and the guide valve plate, the guide valve plate is provided with a plurality of valve plates, and the guide valve plate is used to control the unidirectional upward flow of sewage.

[0007] Preferably, the adsorption layer comprises at least one activated carbon layer, a filter sand layer and a filter cotton layer, and the filter screen and the adsorption layer are both detachably mounted inside the bottom tank body.

[0008] Preferably, an isolation ring is provided between the filter residue collection chamber and the middle tank body, and the isolation ring is used to isolate the middle tank body from the inner chamber of the filter residue collection chamber.

[0009] Preferably, the isolation ring comprises an outer ring and an inner ring, at least one of the outer ring and the inner ring is set as a fixed ring, and the other is set as a movable ring, and a driving assembly is arranged outside the movable ring for controlling the movable ring to rotate relative to the fixed ring.

[0010] Preferably: the outer ring and the inner ring are provided with a plurality of matching through holes, when the through holes of the outer ring and the inner ring completely overlap, the filter residue collection chamber and the interior of the middle tank body are connected, when the through holes of the outer ring and the inner ring are completely misaligned, the filter residue collection chamber and the interior of the middle tank body are in an isolated state.

[0011] Preferably: a mounting plate is provided between the middle tank body and the water outlet tank, the membrane filtering mechanism comprises a plurality of inner positioning tubes fixedly connected to the bottom of the mounting plate, and a filtering membrane is sleeved on the outside of the inner positioning tubes.

[0012] Preferably, a plurality of external convex holes are evenly arranged on the outside of the inner positioning tube, and the openings of the external convex holes face downward.

[0013] Preferably: the membrane filtration mechanism also includes a pressure tube fixedly connected to the top of the water outlet tank, the interior of the pressure tube is fixedly connected with an air inlet pipe, the interior of the pressure tube is movably connected with an inner column core, the upper and lower ends of the inner column core are fixedly connected with sealing blocks, the interior of the inner column core is provided with a vertical connecting groove and a horizontal connecting groove, the exterior of the inner column core is provided with an air outlet connected to the vertical connecting groove, the axis of the horizontal connecting groove is provided with a bottom air outlet, and the interior of the bottom air outlet is provided with a regulating valve, the top of the inner positioning tube is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a driving screw, the driving screw is threadedly connected to the interior of the inner column core, the servo motor is used to drive the inner column core to move up and down in the pressure tube, the position and number of the inner column core are adapted to the inner positioning tube, when the inner column core slides downward, it is inserted into the interior of the inner positioning tube, and when the inner column core is fully inserted into the inner positioning tube, the sealing block abuts against the upper and lower ends of the inner positioning tube.

[0014] Preferably: a first pressure detector is fixedly connected to the bottom of the mounting plate, a second pressure detector is fixedly connected to the bottom of the inner column core, the first pressure detector and the second pressure detector are electrically connected to the driving assembly of the movable ring, the regulating valve and the servo motor, the outside of the air intake pipe is connected to an air pump, and the first pressure detector and the second pressure detector are electrically connected to the air pump.

[0015] Beneficial effects of the present invention: 1. The sewage tank with multi-stage treatment function has an outer convex hole on the outside of the inner positioning tube, so that when the filter membrane is sleeved on the outside of the inner positioning tube, the surface of the filter membrane is uneven, so that the flowing water can more easily pass through the filter membrane into the inside of the inner positioning tube, effectively improving the filtration efficiency, and the outer convex hole is downward, and the opening is in a horizontal state. Therefore, when the filter membrane is sleeved on the outside of the outer convex hole, the filter membrane at the opening position belongs to the main filtering body. At the same time, the outer membrane body here is designed to face downward, so that pollutants are not easy to adhere here, further ensuring the filtration effect.

[0016] 2. The sewage tank with multi-stage treatment function slowly pumps gas into the vertical connecting groove through the air inlet pipe, and the gas is blown downward through the air outlet at the bottom of the axis of the horizontal connecting groove, so that the clean water inside the water outlet tank passes through the filter membrane in the reverse direction, and the filter membrane is cleaned by the clean water of reverse osmosis to complete the cleaning of the filter membrane. When there is no obvious sewage inside the middle tank body, the air intake of the pressure pipe can be increased, so that when the gas passing through the inner positioning pipe blows the filter membrane, it forms agitation, further improving the cleaning effect of the filter membrane, and at the same time facilitating the recycling of the filter membrane and reducing the equipment cost of sewage treatment.

[0017] 3. The sewage tank with multi-stage treatment function drives the independent inner column core to be completely inserted into the inner positioning tube. After the gas is pumped into the pressure tube, the inner column core inserted into the inner positioning tube receives the pumped gas and blows it out through the air outlet, while the air outlets of the remaining inner column cores are in a closed cavity, which is equivalent to a closed state. At this time, only the inner column core of the inner positioning tube is inserted to complete the cleaning of the filter membrane, thereby completing the cleaning of the filter membrane. This effectively ensures the flexibility and adjustability of the filter membrane cleaning.

[0018] 4. The sewage tank with multi-stage treatment function realizes regular automatic independent detection and maintenance of the filter membrane and automatic overall monitoring of the filter membrane during use through the coordinated use of the first pressure detector and the second pressure detector, thereby effectively ensuring the stability of sewage filtration and ensuring the sewage filtration effect. When the filter membrane is blocked, the filter membrane can be automatically cleaned, further improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main part of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal filtering structure of the bottom tank of the present invention; Figure 4 It is a schematic diagram of the membrane filtration mechanism of the present invention; Figure 5 It is a schematic diagram of the connection and positional relationship between a single filter membrane and an inner positioning tube of the present invention; Figure 6 It is a schematic diagram of the membrane filtering part and the membrane cleaning part of the membrane filtering mechanism of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of part A; Figure 8 It is a schematic diagram of the connection between the outer ring and the inner ring of the present invention.

[0020] In the figure: 1, bottom tank body; 2, middle tank body; 3, water outlet tank; 4, water inlet pipe; 5, water outlet pipe; 6, filter residue collection chamber; 7, slag discharge pipe; 8, isolation ring; 9, membrane filtration mechanism; 11. filter screen; 12. adsorption layer; 13. guide valve plate; 31. Mounting plate; 81, outer ring; 82, inner ring; 91. Inner positioning tube; 92. Filter membrane; 93. Pressure tube; 94. Air inlet pipe; 95. Inner column core; 951. Sealing block; 96. Vertical connecting groove; 97. Horizontal connecting groove; 98. Air outlet; 99. Regulating valve; 910. Driving screw rod; 911. Servo motor; 912. First pressure detector; 913. Second pressure detector; 914. External convex hole. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figure 1 - Figure 3 , a sewage tank with multi-stage treatment function, comprising a bottom tank body 1, a middle tank body 2 and a water outlet tank 3 are detachably mounted on the top of the bottom tank body 1 in sequence, a water inlet pipe 4 is fixedly connected to the outside of the bottom tank body 1, a water outlet pipe 5 is fixedly connected to the outside of the water outlet tank 3, the water outlet pipe 5 is externally connected to a valve, a guide valve plate 13 is arranged on the top of the bottom tank body 1, the middle tank body 2 is laminated on the top of the guide valve plate 13, a filter residue collection chamber 6 is fixedly connected to the outside of the middle tank body 2, and a slag discharge pipe 7 is fixedly connected to the outside of the filter residue collection chamber 6; A membrane filtration mechanism 9 is disposed inside the middle tank body 2 . The membrane filtration mechanism 9 is used to perform membrane filtration treatment on sewage. The filtered sewage enters the water outlet tank 3 and is discharged through the water outlet pipe 5 .

[0023] During the sewage purification process, sewage enters through the water inlet pipe 4 and flows out through the water outlet pipe 5. The sewage undergoes primary filtration purification and secondary adsorption purification inside the bottom tank body 1, and then passes through the membrane filtration purification of the membrane filtration mechanism 9. The purified clean water enters the water outlet tank 3, and then flows out through the water outlet pipe 5 and enters the daily life water cycle.

[0024] refer to Figure 2 and Figure 3 In an optional embodiment: a filter screen 11 and an adsorption layer 12 are arranged inside the bottom tank body 1, the adsorption layer 12 is arranged between the filter screen 11 and the guide valve plate 13, the guide valve plate 13 is equipped with a plurality of valve plates, and the guide valve plate 13 is used to control the unidirectional upward flow of sewage.

[0025] It should be noted that the domestic sewage is filtered and purified and adsorbed and purified by the filter mesh 11 and the adsorption layer 12. The sewage enters the bottom of the bottom tank body 1 through the water inlet pipe 4, flows upward from the bottom of the bottom tank body 1, and then is filtered by the filter mesh 11. After being adsorbed by the adsorption layer 12, the sewage continues to flow upward.

[0026] And because it is the treatment of domestic sewage, the main impurities in the sewage are solid pollutants, among which the filter net 11 can filter more than 80% of the pollutants, and then after adsorption by the adsorption layer 12, the basic cleanliness of the water source can be guaranteed, and then the final filtration through the membrane filtration mechanism 9 can ensure the daily use of the treated sewage.

[0027] Among them, the guide valve plate 13 is laminated on the top of the bottom tank body 1 through the middle tank body 2 and fixed. During installation, the guide valve plate 13 is first clamped on the top of the bottom tank body 1, and then the middle tank body 2 is clamped on the top of the bottom tank body 1. The bottom tank body 1 and the middle tank body 2 are fixed by bolts. When fixing the bottom tank body 1 and the middle tank body 2, the guide valve plate 13 is squeezed and fixed by the bottom tank body 1 and the middle tank body 2.

[0028] It should be noted that the filter screen 11 and the adsorption layer 12 are movably connected to the interior of the bottom tank body 1. When the middle tank body 2 and the bottom tank body 1 are separated, the filter screen 11 and the adsorption layer 12 can be taken out for cleaning or replacement.

[0029] In an optional embodiment, the adsorption layer 12 includes at least one activated carbon layer, a filter sand layer and a filter cotton layer, and the filter screen 11 and the adsorption layer 12 are both detachably installed inside the bottom tank body 1.

[0030] It should be noted that the adsorption layer 12 can be made of suitable adsorption materials according to actual conditions.

[0031] Embodiment 2: A sewage tank with multi-stage treatment function, comprising a bottom tank body 1, a middle tank body 2 and a water outlet tank 3 are detachably mounted on the top of the bottom tank body 1 in sequence, a water inlet pipe 4 is fixedly connected to the outside of the bottom tank body 1, a water outlet pipe 5 is fixedly connected to the outside of the water outlet tank 3, the water outlet pipe 5 is externally connected to a valve, a guide valve plate 13 is arranged on the top of the bottom tank body 1, the middle tank body 2 is laminated on the top of the guide valve plate 13, a filter residue collection chamber 6 is fixedly connected to the outside of the middle tank body 2, and a slag discharge pipe 7 is fixedly connected to the outside of the filter residue collection chamber 6; A membrane filtration mechanism 9 is disposed inside the middle tank body 2 . The membrane filtration mechanism 9 is used to perform membrane filtration treatment on sewage. The filtered sewage enters the water outlet tank 3 and is discharged through the water outlet pipe 5 .

[0032] refer to Figure 2 and Figure 8 In an optional embodiment, an isolation ring 8 is provided between the filter residue collection chamber 6 and the middle tank body 2 , and the isolation ring 8 is used to isolate the middle tank body 2 and the inner chamber of the filter residue collection chamber 6 .

[0033] The isolation ring 8 includes an outer ring 81 and an inner ring 82. At least one of the outer ring 81 and the inner ring 82 is set as a fixed ring, and the other is set as a movable ring. A driving component is set outside the movable ring for controlling the movable ring to rotate relative to the fixed ring.

[0034] The outer ring 81 and the inner ring 82 are provided with a plurality of matching through holes. When the through holes of the outer ring 81 and the inner ring 82 completely overlap, the residue collection chamber 6 and the interior of the middle tank body 2 are connected. When the through holes of the outer ring 81 and the inner ring 82 are completely misaligned, the residue collection chamber 6 and the interior of the middle tank body 2 are in an isolated state.

[0035] It should be noted that the filter residue collection chamber 6 is used to collect sewage after cleaning the membrane filtering mechanism 9 , so that the sewage inside the middle tank body 2 flows out through the filter residue collection chamber 6 .

[0036] The slag discharge pipe 7 can be externally connected to a water pump, and the sewage inside the filter residue collection chamber 6 can be pumped out by the water pump.

[0037] It should be noted that when maintaining the filter screen 11 and the adsorption layer 12 , the residual water inside the middle tank body 2 can be extracted through the slag discharge pipe 7 , thereby facilitating the separation and disassembly of the bottom tank body 1 and the middle tank body 2 .

[0038] Embodiment 3: A sewage tank with multi-stage treatment function, comprising a bottom tank body 1, a middle tank body 2 and a water outlet tank 3 are detachably mounted on the top of the bottom tank body 1 in sequence, a water inlet pipe 4 is fixedly connected to the outside of the bottom tank body 1, a water outlet pipe 5 is fixedly connected to the outside of the water outlet tank 3, the water outlet pipe 5 is externally connected to a valve, a guide valve plate 13 is arranged on the top of the bottom tank body 1, the middle tank body 2 is laminated on the top of the guide valve plate 13, a filter residue collection chamber 6 is fixedly connected to the outside of the middle tank body 2, and a slag discharge pipe 7 is fixedly connected to the outside of the filter residue collection chamber 6; A membrane filtration mechanism 9 is disposed inside the middle tank body 2 . The membrane filtration mechanism 9 is used to perform membrane filtration treatment on sewage. The filtered sewage enters the water outlet tank 3 and is discharged through the water outlet pipe 5 .

[0039] On the basis of the second embodiment, the sewage inside the middle tank body 2 is further filtered and cleaned by a membrane filtering mechanism 9 so that the treated sewage meets the use standard, and the membrane filtering mechanism 9 includes a membrane filtering part and a membrane cleaning part.

[0040] The membrane filtration part is as follows: refer to Figure 2 , Figure 4 and Figure 5 In an optional embodiment: a mounting plate 31 is provided between the middle tank body 2 and the water outlet tank 3, the membrane filtration mechanism 9 includes a plurality of inner positioning tubes 91 fixedly connected to the bottom of the mounting plate 31, and a filter membrane 92 is sleeved on the outside of the inner positioning tubes 91.

[0041] It should be noted that during the filtration process, the sewage inside the middle tank body 2 penetrates into the inner positioning tube 91 through the filter membrane 92, and the filtered sewage is collected inside the water outlet tank 3 through several inner positioning tubes 91, and then discharged through the water outlet pipe 5 and enters the domestic water cycle.

[0042] By vertically arranging the filter membrane 92 and arranging a plurality of filter membranes 92 in a straight cylindrical shape and sleeved on the outside of the inner positioning tube 91, the contact area between the filter membrane 92 and the sewage is effectively increased, thereby ensuring the filtering effect of the filter membrane 92. The inner positioning tube 91 can effectively ensure the stability of the filter membrane 92, ensure the stability of the filter membrane 92 during the filtration process, and avoid the filter membrane 92 directly arranged vertically from being entangled, folded, etc. inside the middle tank body 2, thereby effectively ensuring the filtering effect of the membrane filtration mechanism 9.

[0043] In an optional embodiment: a plurality of external convex holes 914 are evenly arranged on the outside of the inner positioning tube 91, and the openings of the external convex holes 914 face downward.

[0044] The outer convex hole 914 on the outside of the inner positioning tube 91 makes the filter membrane 92 uneven when it is sleeved on the outside of the inner positioning tube 91, and the water flows from the bottom to the top through the guide valve plate 13, and then enters the inside of the inner positioning tube 91 through the filter membrane 92. At the same time, since the opening of the outer convex hole 914 faces downward, during the upward flow of water, the outer convex hole 914 can form a flow resistance to the upward flowing sewage, thereby facilitating the flowing water to pass through the filter membrane 92 more easily into the inside of the inner positioning tube 91, effectively improving the filtration efficiency. The outer convex hole 914 faces downward, and the opening is in a horizontal state. Therefore, when the filter membrane 92 is sleeved on the outside of the outer convex hole 914, the filter membrane 92 at the opening position protrudes outward, and the opening position area is horizontal, and the outer membrane body faces downward. Therefore, during the filtration process, the filter membrane 92 here belongs to the filtration main body. At the same time, the outer membrane body here is designed to face downward, so that pollutants are not easy to adhere here, further ensuring the filtration effect.

[0045] The membrane cleaning part is as follows: refer to Figure 5-Figure 7 In an optional embodiment: the membrane filtration mechanism 9 also includes a pressure tube 93 fixedly connected to the top of the water outlet tank 3, the pressure tube 93 is fixedly connected to the air inlet pipe 94, the pressure tube 93 is movably connected to the inner column core 95, the upper and lower ends of the inner column core 95 are fixedly connected to sealing blocks 951, the inner column core 95 is provided with a vertical connection groove 96 and a horizontal connection groove 97, the inner column core 95 is provided with an air outlet 98 connected to the vertical connection groove 96, the axis of the horizontal connection groove 97 is provided with a bottom air outlet, and the bottom air outlet is provided with a regulating The throttle valve 99 and the top of the inner positioning tube 91 are fixedly connected with a servo motor 911, and the output end of the servo motor 911 is fixedly connected with a driving screw 910, and the driving screw 910 is threadedly connected to the inside of the inner column core 95. The servo motor 911 is used to drive the inner column core 95 to move up and down inside the pressure tube 93. The position and number of the inner column core 95 are adapted to the inner positioning tube 91. When the inner column core 95 slides downward, it is inserted into the inner positioning tube 91. When the inner column core 95 is fully inserted into the inner positioning tube 91, the sealing block 951 abuts against the upper and lower ends of the inner positioning tube 91.

[0046] It should be noted that the several servo motors 911 and the regulating valves 99 can be controlled individually; When the inner column core 95 is inside the pressure tube 93, the upper and lower ends of the inner column core 95 are in contact with the inside of the pressure tube 93 through the sealing blocks 951, and a gap is provided between the inner column core 95 and the pressure tube 93 in the middle section of the sealing blocks 951 on both sides; When the inner column core 95 is inside the inner positioning tube 91, the upper and lower ends of the inner column core 95 are in contact with the inner positioning tube 91 through the sealing blocks 951, and a gap is provided between the inner column core 95 and the inner positioning tube 91 in the middle section of the sealing blocks 951 on both sides, and a plurality of external convex holes 914 are located between the sealing blocks 951 at both ends; The regulating valve 99 is used to adjust the communication state between the vertical connecting groove 96 and the horizontal connecting groove 97; Among them, the vertical connecting groove 96 is connected to the air intake pipe 94, the air intake pipe 94 is connected to an external air pump, and the air intake pipe 94 can also be connected to an external water pump. The external water pump passes water to the inside of the vertical connecting groove 96 through the air intake pipe 94, and the filter membrane 92 is cleaned with clean water. This embodiment only describes the pumping of air through the air intake pipe 94.

[0047] The specific membrane filtration and membrane cleaning process is as follows: After adsorption treatment by the adsorption layer 12, the sewage flows into the middle tank body 2 through the guide valve plate 13, and the sewage gradually flows upward in the middle tank body 2. When the entire middle tank body 2 is filled, the sewage flows into the inner positioning tube 91 through the filter membrane 92 under the action of water pressure, flows into the interior of the water outlet tank 3 through the inner positioning tube 91, and finally flows out from the water outlet pipe 5.

[0048] Membrane cleaning includes overall cleaning and independent cleaning.

[0049] During overall cleaning, the regulating valve 99 is controlled to connect the vertical connecting groove 96 and the horizontal connecting groove 97, and at the same time, the outer ring 81 and the inner ring 82 are controlled to rotate relative to each other, so that the through holes of the outer ring 81 and the inner ring 82 overlap, and the middle tank body 2 and the filter residue collection chamber 6 are connected, and then gas is slowly pumped into the vertical connecting groove 96 through the air inlet pipe 94, and the gas is blown downward through the axial bottom air outlet of the horizontal connecting groove 97, so that the clean water inside the water outlet tank 3 passes through the filter membrane 92 in the reverse direction, and the filter membrane 92 is cleaned by the clean water of reverse osmosis, completing the cleaning of the filter membrane 92. At the same time, under the continuous pumping of gas, the residual collected water inside the middle tank body 2 flows into the filter residue collection chamber 6 through the outer ring 81 and the inner ring 82, and then the sewage after cleaning the filter membrane 92 is discharged through the slag discharge pipe 7.

[0050] When there is no obvious sewage inside the middle tank body 2, the air intake of the pressure pipe 93 can be increased, so that when the gas passing through the inner positioning tube 91 blows the filter membrane 92, a vortex is formed. Due to the setting of the outer convex hole 914, when the gas is blown outward through the inner positioning tube 91, the wind direction flows downward, and the main air outlet position coincides with the main filtering area of ​​the filter membrane 92. Therefore, when the air is cleaned, the direction of removing impurities adhering to the outside of the filter membrane 92 is downward, thereby effectively ensuring the cleaning effect of the filter membrane 92, and at the same time facilitating the recycling of the filter membrane 92, thereby reducing the equipment cost of sewage treatment.

[0051] When cleaning independently, the separate servo motor 911 is started, the servo motor 911 drives the driving screw 910 to rotate, and the driving screw 910 drives the inner column core 95 to move downward, and the driving inner column core 95 is finally fully inserted into the interior of the inner positioning tube 91 and then stops.

[0052] At this time, the regulating valve 99 of the inner column core 95 inserted into the inner positioning tube 91 is controlled to be opened, and the other regulating valves 99 are in a closed state.

[0053] After the gas is pumped in through the pressure tube 93, the inner column core 95 inserted into the inner positioning tube 91 receives the pumped gas and blows it out through the gas outlet 98, while the gas outlet 98 of the remaining inner column core 95 is in a closed cavity, which is equivalent to a closed state. At this time, only the inner column core 95 inserted into the inner positioning tube 91 completes the cleaning of the filter membrane 92, thereby completing the cleaning of the filter membrane 92. Thus, the flexibility and adjustability of cleaning the filter membrane 92 are effectively guaranteed. Example

[0054] refer to Figure 6 and Figure 7 On the basis of the third embodiment, by adding a first pressure detector 912 and a second pressure detector 913, automatic monitoring and cleaning of the filter membrane 92 is realized. When a large amount of impurities remain on the surface of the filter membrane 92 and cause blockage, the filter membrane 92 can be automatically cleaned.

[0055] A first pressure detector 912 is fixedly connected to the bottom of the mounting plate 31, and a second pressure detector 913 is fixedly connected to the bottom of the inner column core 95. The first pressure detector 912 and the second pressure detector 913 are electrically connected to the driving assembly of the movable ring, the regulating valve 99 and the servo motor 911. The outside of the air inlet pipe 94 is connected to the air pump, and the first pressure detector 912 and the second pressure detector 913 are electrically connected to the air pump.

[0056] It should be noted that by comparing the pressure differences between the second pressure detectors 913 and the first pressure detector 912, the sewage filtration condition of the filter membrane 92 is judged. When blockage occurs, the pressure value of the first pressure detector 912 is greater than the pressure value of the first pressure detector 912. When the difference between the first pressure detector 912 and the second pressure detector 913 is greater than the set value, the membrane cleaning work is performed.

[0057] At the same time, the accumulated water inside the middle tank body 2 can be discharged through the slag discharge pipe 7, and then the through holes of the outer ring 81 and the inner ring 82 can be controlled to be misaligned, and then the inner column core 95 can be controlled to move downward, so that the lower end sealing block 951 of the inner column core 95 abuts against the top position of the inner positioning tube 91, and the regulating valve 99 is closed to make the interior of the middle tank body 2 in a sealed state, and then the sewage can be controlled to enter through the guide valve plate 13. As the sewage enters, the internal air pressure of the middle tank body 2 increases, and because the shape of the inner positioning tube 91 is fixed, the filter membrane 92 has air flow resistance, Therefore, the air pressure changes inside and outside the filter membrane 92 are different. By measuring the changes in the pressure values ​​of the first pressure detector 912 and the second pressure detector 913, if the pressure quickly achieves equilibrium, it can be determined that the filter membrane 92 is damaged and needs to be replaced. If the pressure value tends to equilibrium steadily and the equilibrium speed is within the system threshold range, the filter membrane 92 is normal. If the pressure value tends to equilibrium slowly and the equilibrium speed exceeds the system threshold range, it is determined that the filter membrane 92 is blocked and the filter membrane 92 can be cleaned separately through the membrane cleaning part.

[0058] By using the first pressure detector 912 and the second pressure detector 913 in coordination, regular automatic independent detection and maintenance of the filter membrane 92 and automatic overall monitoring of the filter membrane 92 during use can be achieved, thereby effectively ensuring the stability of sewage filtration and ensuring the sewage filtration effect. When the filter membrane 92 is blocked, the filter membrane 92 can be automatically cleaned, further improving the use effect of the device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sewage tank with multi-stage treatment function, comprising a bottom tank body (1), characterized in that: The top of the bottom tank body (1) is detachably mounted with a middle tank body (2) and a water outlet tank (3) in sequence; the outside of the bottom tank body (1) is fixedly connected to a water inlet pipe (4); the outside of the water outlet tank (3) is fixedly connected to a water outlet pipe (5); the top of the bottom tank body (1) is provided with a guide valve plate (13); the middle tank body (2) is laminated on the top of the guide valve plate (13); the outside of the middle tank body (2) is fixedly connected to a filter residue collection chamber (6); the outside of the filter residue collection chamber (6) is fixedly connected to a slag discharge pipe (7); A membrane filtration mechanism (9) is arranged inside the middle tank body (2), and the membrane filtration mechanism (9) is used to perform membrane filtration treatment on sewage. The filtered sewage enters the water outlet tank (3) and is discharged through the water outlet pipe (5).

2. A sewage tank with multi-stage treatment function according to claim 1, characterized in that: A filter screen (11) and an adsorption layer (12) are arranged inside the bottom tank body (1); the adsorption layer (12) is arranged between the filter screen (11) and the guide valve plate (13); the guide valve plate (13) is provided with a plurality of valve plates; the guide valve plate (13) is used to control the unidirectional upward flow of sewage.

3. A sewage tank with multi-stage treatment function according to claim 2, characterized in that: The adsorption layer (12) comprises at least one activated carbon layer, a filter sand layer and a filter cotton layer, and the filter screen (11) and the adsorption layer (12) are both detachably mounted inside the bottom tank body (1).

4. The sewage tank with multi-stage treatment function according to claim 1, characterized in that: An isolation ring (8) is provided between the filter residue collection chamber (6) and the middle tank body (2), and the isolation ring (8) is used to isolate the middle tank body (2) and the inner chamber of the filter residue collection chamber (6).

5. A sewage tank with multi-stage treatment function according to claim 4, characterized in that: The isolation ring (8) comprises an outer ring (81) and an inner ring (82); at least one of the outer ring (81) and the inner ring (82) is configured as a fixed ring, and the other is configured as a movable ring; a driving assembly is disposed outside the movable ring for controlling the movable ring to rotate relative to the fixed ring.

6. The sewage tank with multi-stage treatment function according to claim 5, characterized in that: The outer ring (81) and the inner ring (82) are provided with a plurality of matching through holes. When the through holes of the outer ring (81) and the inner ring (82) completely overlap, the filter residue collection chamber (6) and the interior of the middle tank body (2) are connected. When the through holes of the outer ring (81) and the inner ring (82) are completely misaligned, the filter residue collection chamber (6) and the interior of the middle tank body (2) are in an isolated state.

7. The sewage tank with multi-stage treatment function according to claim 5, characterized in that: A mounting plate (31) is provided between the middle tank body (2) and the water outlet tank (3), and the membrane filtering mechanism (9) comprises a plurality of inner positioning tubes (91) fixedly connected to the bottom of the mounting plate (31), and a filtering membrane (92) is sleeved on the outside of the inner positioning tubes (91).

8. The sewage tank with multi-stage treatment function according to claim 7, characterized in that: A plurality of external convex holes (914) are evenly arranged on the outside of the inner positioning tube (91), and the openings of the external convex holes (914) face downward.

9. The sewage tank with multi-stage treatment function according to claim 7, characterized in that: The membrane filtration mechanism (9) further comprises a pressure tube (93) fixedly connected to the top of the water outlet tank (3); an air inlet pipe (94) is fixedly connected to the interior of the pressure tube (93); an inner column core (95) is movably connected to the interior of the pressure tube (93); sealing blocks (951) are fixedly connected to the upper and lower ends of the inner column core (95); a vertical connection groove (96) and a horizontal connection groove (97) are provided inside the inner column core (95); an air outlet (98) connected to the vertical connection groove (96) is provided outside the inner column core (95); a bottom air outlet is provided at the axis of the horizontal connection groove (97); a regulating valve (99) is provided inside the bottom air outlet; A servo motor (911) is fixedly connected to the top of the inner positioning tube (91), and a driving screw (910) is fixedly connected to the output end of the servo motor (911). The driving screw (910) is threadedly connected to the inside of the inner column core (95). The servo motor (911) is used to drive the inner column core (95) to move up and down inside the pressure tube (93). The position and number of the inner column core (95) are adapted to the inner positioning tube (91). When the inner column core (95) slides downward, it is inserted into the inner positioning tube (91). When the inner column core (95) is fully inserted into the inner positioning tube (91), the sealing block (951) abuts against the upper and lower ends of the inner positioning tube (91).

10. A sewage tank with multi-stage treatment function according to claim 9, characterized in that: A first pressure detector (912) is fixedly connected to the bottom of the mounting plate (31), and a second pressure detector (913) is fixedly connected to the bottom of the inner column core (95). The first pressure detector (912) and the second pressure detector (913) are electrically connected to a drive assembly of the movable ring, a regulating valve (99) and a servo motor (911). The outside of the air inlet pipe (94) is connected to an air pump, and the first pressure detector (912) and the second pressure detector (913) are electrically connected to the air pump.

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