Reverse osmosis membrane sewage treatment equipment convenient to maintain

Abstract

The invention discloses reverse osmosis membrane sewage treatment equipment convenient to maintain, and belongs to the technical field of sewage treatment.The reverse osmosis membrane sewage treatment equipment comprises a pumping mechanism used for continuously pumping sewage to be treated, and the pumping mechanism is provided with a filtering mechanism used for conducting primary treatment on the sewage and a treatment mechanism used for conducting reverse osmosis treatment on the sewage; synchronous and organic cooperation of multi-stage actions such as water pumping, pretreatment pushing and reverse osmosis water pushing driven by a single motor is achieved, and the rotating motion of the motor is finally converted into precise reciprocating linear motion of the sliding frame and the piston rod through the input transmission belt, the rotating connecting rod and the reciprocating rotating rod mechanism; the linear motion synchronously controls three groups of front plug plates and rear plug plates, so that sewage is pumped from the sewage tank, pushed to the pretreatment unit and pushed to the RO membrane unit, the automation degree is high, and the continuity is good.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a reverse osmosis membrane wastewater treatment device that is easy to maintain. Background Technology

[0002] Reverse osmosis membrane technology, as a highly efficient water treatment method, has been widely used in the deep treatment and reuse of industrial and domestic wastewater. Reverse osmosis membranes can effectively remove pollutants such as dissolved salts, colloids, organic matter, and microorganisms from water, producing excellent water quality. However, in actual operation, traditional reverse osmosis membrane wastewater treatment equipment still faces many challenges. First, the pretreatment system of the equipment is often complex in structure and inconvenient to maintain. Large particulate impurities and suspended solids in the wastewater can easily clog the pretreatment filter media or filter cartridges, leading to increased system pressure differential and decreased water production. When replacing or cleaning common multi-stage filtration devices, it is usually necessary to disassemble a large number of pipes and connecting parts, which is cumbersome and affects the continuous operation efficiency of the equipment. At the same time, the replacement cycle of each filter cartridge or filter media in the pretreatment unit is different. If rapid and independent replacement cannot be achieved, it will increase maintenance costs and time. Secondly, reverse osmosis membrane elements are susceptible to fouling and scaling during long-term operation. Especially when the feed water quality fluctuates or the pretreatment effect is poor, the membrane lifespan will be significantly shortened. In traditional equipment, RO membranes are usually fixedly installed and operate in the same position for extended periods, leading to uneven stress and fouling distribution on the membrane surface. This can cause localized clogging, affecting overall membrane flux and lifespan. Furthermore, the adjustment of concentrate discharge often relies on simple valves, making precise control difficult and hindering the optimization of system recovery rates and energy consumption reduction. Additionally, existing reverse osmosis wastewater treatment equipment often uses a single pump set for hydraulic transport and pressurization, lacking a flexible flow regulation mechanism. When the treated water volume fluctuates, the equipment often operates at a fixed power, resulting in excessive energy consumption under low-load conditions. Moreover, maintenance and replacement of core components often require complete disassembly, which is not only physically demanding but also prone to leaks or performance degradation due to assembly errors.

[0003] Therefore, there is an urgent need to develop a new type of wastewater treatment equipment that is structurally sound, easy to maintain, adaptable to different water volumes, and can effectively extend the life of the reverse osmosis membrane, in order to solve the problems of difficult maintenance of the pretreatment system, easy fouling of the RO membrane, inflexible water flow adjustment, and cumbersome replacement of key components in the existing technology. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution: a reverse osmosis membrane wastewater treatment device that is easy to maintain, comprising an injection mechanism for continuously pumping wastewater to be treated into the device, the injection mechanism comprising three main injection pipes and three main discharge pipes, and the injection mechanism being provided with a filtration mechanism for preliminary treatment of the wastewater and a treatment mechanism for reverse osmosis treatment of the wastewater.

[0005] The pumping mechanism includes three movable frames. Each of the three main push-out pipes has an outlet bend fixedly installed below it, and a filter valve body is fixedly installed on the outlet bend. Each of the three main pumping pipes has an inlet bend fixedly installed below it, and a pumping valve body is fixedly installed on the inlet bend.

[0006] Furthermore, the pumping mechanism also includes a sewage tank, an inclined filter plate is fixedly installed inside the sewage tank, the inclined filter plate is provided with multiple slots, three water inlet pipes are fixedly installed on the sewage tank, the bottom of the water inlet pipes is located below the inclined filter plate, an inlet valve body is fixedly installed on each of the three water inlet pipes, an inlet ball valve is rotatably installed inside the inlet valve body, the three inlet ball valves are fixedly installed between each other, an inlet gear is fixedly installed on the outer inlet ball valve, and the inlet valve body is fixedly installed with the main pumping pipe.

[0007] Furthermore, a filter ball valve is rotatably installed inside the filter valve body, and the filter ball valves in the three filter valve bodies are fixedly installed together. A filter gear is fixedly installed on the outer filter ball valve. A pumping ball valve is rotatably installed inside the pumping valve body, and the pumping ball valves in the three pumping valve bodies are fixedly installed together. A rear gear and a pumping gear are fixedly installed on the two pumping ball valves located on the outer side, respectively. A transverse transmission belt is wound around the filter gear and the rear gear, and an oblique transmission belt is wound around the inlet gear and the pumping gear.

[0008] Furthermore, a front plug plate is slidably installed inside each of the three main inlet pipes, and a rear plug plate is slidably installed inside each of the three main outlet pipes. A piston rod is fixedly installed on the rear plug plate. The piston rod is fixedly installed with the front plug plate, slidably installed with the main inlet pipe and the main outlet pipe, and fixedly installed with the movable frame.

[0009] Furthermore, the pumping mechanism also includes a fixed frame, on which a rotating connecting rod is rotatably mounted, and on which a rotating gear is fixedly mounted. A motor is located next to the sewage tank, and on which a motor gear is fixedly mounted. An input transmission belt is wound around the motor gear and the rotating gear. A reciprocating rotating rod is rotatably mounted on the rotating connecting rod, and a sliding frame is rotatably mounted on the reciprocating rotating rod.

[0010] Furthermore, an electric cylinder is fixedly installed on the sliding frame, an insertion frame is fixedly installed on the output end of the electric cylinder, an insertion post is fixedly installed on the insertion frame, a toggle frame is fixedly installed on the sliding frame, a rear paddle and a front paddle are fixedly installed on the toggle frame, the insertion post slides inside the sliding frame, and in the initial state, the insertion post passes through three movable frames, and a connecting frame is fixedly installed on the transverse transmission belt.

[0011] The motor rotation drives the motor gear to rotate, and the motor gear drives the rotating gear and rotating connecting rod to rotate through the input transmission belt. The rotating connecting rod drives the sliding frame, electric cylinder, insertion frame, insertion column, piston rod and movable frame to reciprocate through the reciprocating rod. This achieves the reciprocating sliding of the front plug plate in the main inlet pipe and the reciprocating sliding of the rear plug plate in the main outlet pipe. At the same time, the sliding frame drives the actuating frame to move, passing the sewage into the sewage tank. Large debris in the sewage is blocked by the inclined filter plate, and then the sewage reaches the bottom of the inclined filter plate.

[0012] First, the piston rod moves away from the wastewater tank, causing the front plug plate to move away from the wastewater tank within the main inlet pipe. Wastewater from the tank is then pumped into the main inlet pipe and inlet bend through the inlet pipe. At this time, the pumping ball valve is closed, the inlet ball valve is open, and the filter ball valve is closed. Simultaneously, the rear plug plate moves away from the wastewater tank within the main outlet pipe, pushing water from the outlet pipe into the RO membrane. When the piston rod reaches its furthest position from the wastewater tank, the front deflector pushes the connecting bracket away from the wastewater tank. The movement causes the connecting frame to rotate the horizontal transmission belt clockwise, which in turn causes the filter gear and filter ball valve to rotate 90 degrees. At the same time, the horizontal transmission belt causes the rear gear, the water pumping ball valve, and the water pumping gear to rotate 90 degrees. The water pumping gear, through the oblique transmission belt, causes the inlet gear and the inlet ball valve to rotate 90 degrees. At this time, the water pumping ball valve and the filter ball valve open, and the inlet ball valve closes. This process draws water from the sewage tank into the main inlet pipe and pushes water out of the main outlet pipe. At this time, the one-way plate and the one-way column are pushed downward, the one-way spring is compressed, and the sewage enters the bottom cavity through the one-way frame.

[0013] The piston rod then moves towards the wastewater tank, causing the front plug plate to move towards the wastewater tank within the main inlet pipe. At this time, the pumping ball valve and the filter ball valve are open, while the inlet ball valve is closed. The front plug plate pushes the water in the main inlet pipe and the filter ball valve into the coarse filter housing. Simultaneously, the rear plug plate moves towards the wastewater tank within the main outlet pipe, drawing the wastewater, which has undergone preliminary treatment by the filtration mechanism, into the main outlet pipe through the outlet bend. When the piston rod reaches its closest position to the wastewater tank, the rear deflector pushes the connecting frame towards the wastewater tank. The connecting frame drives the horizontal transmission belt to rotate counterclockwise, causing the filter gear and filter ball valve to rotate 90 degrees. At the same time, the horizontal transmission belt drives the rear gear, the pumping ball valve, and the pumping gear to rotate 90 degrees. The pumping gear, through the oblique transmission belt, drives the inlet gear and the inlet ball valve to rotate 90 degrees. At this time, the pumping ball valve and the filter ball valve are closed, while the inlet ball valve is open. This process draws water from the main inlet pipe into the filtration mechanism and water from the filtration mechanism into the main outlet pipe, repeating the process.

[0014] When the wastewater volume is large, the electric cylinder is in a fully retracted state, and the insertion column is inserted into the three movable frames. When the wastewater volume is small, the electric cylinder can extend, driving the insertion frame and the insertion column to move. After the insertion column is pulled out of the movable frame, when the sliding frame and the insertion column reciprocate, they will not drive the movable frame and piston rod that have already pulled out the insertion column to move. At most, the insertion column can be pulled out from two movable frames. At this time, the movement of the sliding frame will only drive one piston rod and movable frame to move, and the wastewater volume is minimized.

[0015] Furthermore, the filtration mechanism includes a fine filter housing fixedly installed on the filter valve body. Three filter tubes are fixedly installed on the fine filter housing by bolts. A coarse filter housing is fixedly installed on the filter tubes. The filter tubes are fixedly installed to the filter valve body by bolts. The coarse filter housing is fixedly installed to the water pumping valve body. Three ultrafiltration membrane filter elements are fixedly installed inside the fine filter housing by threads. The three ultrafiltration membrane filter elements are located in three independent spaces inside the fine filter housing. Three pull-out racks are fixedly installed inside the coarse filter housing by bolts. An inner partition is fixedly installed on the pull-out rack. Activated carbon and PP cotton are respectively arranged on both sides of the inner partition.

[0016] After the sewage is pushed into the coarse filter shell from the main inlet pipe, the residual chlorine, organic matter, odor and particulate impurities in the sewage are removed by the activated carbon and PP cotton in the inner partition. Then the sewage enters the ultrafiltration membrane filter element through the filter pipe. The ultrafiltration membrane filter element removes bacteria, viruses, colloids and macromolecular organic matter in the sewage. After that, the sewage is pumped into the outlet bend and the main outlet pipe.

[0017] When the activated carbon and PP cotton inside the extraction rack need to be replaced, simply remove the bolts connecting the extraction rack to the coarse filter housing to remove the extraction rack from the coarse filter housing for easy maintenance and replacement. When the ultrafiltration membrane filter element needs to be replaced, remove the bolts between the fine filter housing and the filter valve body and filter tube to remove the fine filter housing. Then, the ultrafiltration membrane filter element can be manually unscrewed from this fine filter housing for replacement. Afterward, the fine filter housing is reinstalled between the filter tube and the filter valve body for convenient maintenance.

[0018] Furthermore, the processing mechanism includes a rotating filter cylinder rotatably mounted on the main discharge pipe, a rotating disk fixedly mounted on the rotating filter cylinder by bolts, a lower push rod slidably mounted inside the main discharge pipe, the lower push rod being fixedly mounted to a movable frame, a push ring fixedly mounted on the lower push rod, the push ring having multiple water passage grooves, a sliding column slidably mounted on the push ring, an end push plate and an opening ring fixedly mounted on the sliding column, an opening spring between the opening ring and the push ring, an RO membrane fixedly mounted inside the rotating filter cylinder, multiple elongated grooves on the rotating filter cylinder, a bottom cavity inside the main discharge pipe, the outer diameter of the push ring being the same as the diameter of the bottom cavity, in normal state, the end push plate is in contact with the push ring, the end push plate closes the water passage grooves on the push ring, the opening spring is in an unforced state, and the outside of the rotating filter cylinder is connected to an external water outlet pipe.

[0019] Furthermore, a one-way frame is fixedly installed inside the main ejector tube, a one-way column is slidably installed on the one-way frame, a one-way plate is fixedly installed on the one-way column, and a one-way spring is provided between the one-way column and the one-way frame.

[0020] Furthermore, a drain valve housing is rotatably mounted on the rotating disk, a drain ball valve is rotatably mounted inside the drain valve housing, the drain ball valves inside the three drain valve housings are fixedly mounted, a drain handle is fixedly mounted on the outer drain ball valve, a precision valve housing is fixedly mounted on the drain valve housing, the precision valve housing is provided with an internal thread, a threaded rod is rotatably mounted on the precision valve housing through the thread, and the precision valve housing is connected to an external wastewater pipe.

[0021] Rotating the drain handle rotates the drain ball valve, thereby adjusting the flow rate of concentrated water at the end of the rotating filter cartridge. Rotating the threaded rod raises the threaded rod, further finely adjusting the flow rate of concentrated water. Through the synchronous adjustment of the threaded rod and the drain handle, the flow rate of concentrated water can be finely adjusted, i.e., the filtration ratio can be finely adjusted. When the movable frame and the lower push rod move towards the wastewater tank, the water in the rotating filter cartridge and RO membrane is pushed forward by the end push plate and push ring. The thrust applies pressure to the wastewater. After being filtered by the RO membrane, the wastewater flows out from the external outlet pipe, while the concentrated water is discharged through the drain valve housing and the precision valve housing.

[0022] When the movable frame and the push rod move away from the wastewater tank, the opening ring, the push ring, and the end push plate move towards the main push pipe. When the opening ring enters the bottom cavity, the one-way plate cannot move and keeps the one-way frame closed. At this time, due to the high water pressure in the bottom cavity, the water pressure pushes the opening ring, the sliding column, and the end push plate to slide during the movement of the opening ring. The opening spring is compressed, and the end push plate no longer closes the water passage of the push ring. The water in the bottom cavity can enter the RO membrane through the push ring. That is, all the water in the bottom cavity reaches the front of the end push plate. When the push rod moves towards the wastewater tank again with the end push plate and the push ring, the end push plate pushes out all the water in the RO membrane and the bottom cavity. This process is repeated.

[0023] When maintenance of the RO membrane is required, the rotating disc and rotating filter cartridge can be rotated to change the position of the RO membrane located directly below, preventing the RO membrane from always being in the bottom position and improving the lifespan of the RO membrane. When the RO membrane needs to be replaced, the rotating filter cartridge and RO membrane can be rotated to replace the RO membrane.

[0024] The beneficial effects of this invention compared with the prior art are: (1) This invention uses modular design to connect the pretreatment unit and the core valve group with bolts, and designs the filter element as an independent rotatable or threaded fixed structure. When cleaning or replacing consumables is required, maintenance personnel do not need to disassemble the entire pipeline system, but only need to operate on specific modules, which reduces the technical difficulty and labor cost of maintenance work; (2) The extraction mechanism set in this invention can flexibly adjust the number of working piston units through the clutch and engagement of the insertion column controlled by the electric cylinder and the movable frame. When processing high water volume, all piston units operate synchronously to achieve maximum processing capacity. When processing low water volume, some piston units can be stopped, so that the drive system only needs to provide power to the actual working units, so that the equipment power can be dynamically matched with the actual processing demand, effectively avoiding energy waste under low load conditions; (3) The invention sets The processing mechanism designs the RO membrane assembly as a rotatable rotating filter cartridge structure. When maintenance or wear balancing is required, the orientation of the RO membrane in space can be changed by rotating the rotating disk and rotating the filter cartridge. This allows the area that was originally most severely affected by fouling and pressure to take turns resting and recovering, thereby avoiding premature failure of local areas, extending its service life, and reducing the replacement frequency and cost of core consumables; (4) This invention realizes the synchronization and organic coordination of multiple actions such as pumping, pretreatment pushing and reverse osmosis pushing under the drive of a single motor. The rotational motion of the motor is ultimately converted into the precise reciprocating linear motion of the sliding frame and piston rod through the input transmission belt, rotating connecting rod and reciprocating rotating rod mechanism. This linear motion synchronously controls the three sets of front and rear plug plates, realizing the pumping of sewage from the sewage tank, the pushing to the pretreatment unit and the advancement to the RO membrane unit. It has a high degree of automation and good continuity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the extraction mechanism of the present invention. Figure 1 .

[0027] Figure 3 This is a schematic diagram of the extraction mechanism of the present invention. Figure 2 .

[0028] Figure 4 This is a schematic diagram of the extraction mechanism of the present invention. Figure 3 .

[0029] Figure 5 This is a schematic diagram of the extraction mechanism of the present invention. Figure 4 .

[0030] Figure 6 This is a schematic diagram of the extraction mechanism of the present invention. Figure 5 .

[0031] Figure 7 This is a schematic diagram of the filter mechanism structure of the present invention. Figure 1 .

[0032] Figure 8 This is a schematic diagram of the filter mechanism structure of the present invention. Figure 2 .

[0033] Figure 9 This is a schematic diagram of the processing mechanism structure of the present invention. Figure 1 .

[0034] Figure 10 This is a schematic diagram of the processing mechanism structure of the present invention. Figure 2 .

[0035] Figure 11 This is a schematic diagram of the processing mechanism structure of the present invention. Figure 3 .

[0036] Figure 12 for Figure 11 A magnified view of a portion of point A in the middle.

[0037] Reference numerals: 101-Main inlet pipe; 102-Main outlet pipe; 103-Inlet pipe; 104-Sewage tank; 105-Inlet valve body; 106-Sliding frame; 107-Electric cylinder; 108-Insertion frame; 109-Piston rod; 110-Modular frame; 111-Outlet elbow; 112-Filter valve body; 113-Inlet elbow; 114-Motor; 115-Motor gear; 116-Input transmission belt; 117-Rotating gear; 118-Rotating connecting rod; 119-Reciprocating rod; 120-Pump valve body; 121-Pump gear; 122-Inlet gear; 123-Angled transmission belt; 124-Filter gear; 125-Rear gear; 126-Horizontal transmission belt; 127-Fixed frame; 128-Connecting frame; 129-Actuating frame; 130-Rear lever; 131-Front lever; 132-Inlet ball valve; 133-Filter ball valve; 134-Pumping ball valve; 135-Inclined filter plate; 136-Rear plug plate; 137-Front plug plate; 138-Insertion column; 201-Fine filter housing; 202-Filter tube; 203-Coarse filter housing; 204-Inner partition plate; 205-Ultrafiltration membrane cartridge; 206-Extraction rack; 301-Rotating filter cartridge; 302-Rotating disc; 303-Drain valve housing 304 - Drain handle; 305 - Precision valve body; 306 - Threaded rod; 307 - Drain ball valve; 308 - Downward push rod; 309 - One-way bracket; 310 - One-way plate; 311 - One-way column; 312 - One-way spring; 313 - Push ring; 314 - End push plate; 315 - Slide column; 316 - Opening ring; 317 - Opening spring; 318 - RO membrane; 319 - Bottom cavity. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0039] Example: Reference Figures 1-12 A maintenance-friendly reverse osmosis membrane wastewater treatment device includes an injection mechanism for continuously pumping wastewater to be treated into the device. The injection mechanism includes three main injection pipes 101 and three main discharge pipes 102. The injection mechanism is equipped with a filtration mechanism for preliminary treatment of the wastewater and a treatment mechanism for reverse osmosis treatment of the wastewater.

[0040] The pumping mechanism includes three movable frames 110, and each of the three main push pipes 102 has an outlet bend 111 fixedly installed below it. A filter valve body 112 is fixedly installed on the outlet bend 111. Each of the three main pumping pipes 101 has an inlet bend 113 fixedly installed below it. A pumping valve body 120 is fixedly installed on the inlet bend 113.

[0041] like Figures 2-6 As shown, the pumping mechanism also includes a sewage tank 104. An inclined filter plate 135 is fixedly installed inside the sewage tank 104. The inclined filter plate 135 is provided with multiple slots. Three water inlet pipes 103 are fixedly installed on the sewage tank 104. The bottom of the water inlet pipes 103 is located below the inclined filter plate 135. An inlet valve body 105 is fixedly installed on each of the three water inlet pipes 103. An inlet ball valve 132 is rotatably installed inside the inlet valve body 105. The three inlet ball valves 132 are fixedly installed between each other. An inlet gear 122 is fixedly installed on the outer inlet ball valve 132. The inlet valve body 105 is fixedly installed with the main pumping pipe 101.

[0042] like Figures 2-6 As shown, a filter ball valve 133 is rotatably installed inside the filter valve body 112. The filter ball valves 133 inside the three filter valve bodies 112 are fixedly installed together. A filter gear 124 is fixedly installed on the outer filter ball valve 133. A pumping ball valve 134 is rotatably installed inside the pumping valve body 120. The pumping ball valves 134 inside the three pumping valve bodies 120 are fixedly installed together. A rear gear 125 and a pumping gear 121 are fixedly installed on the two outer pumping ball valves 134 respectively. A horizontal transmission belt 126 is wound around the filter gear 124 and the rear gear 125. An oblique transmission belt 123 is wound around the inlet gear 122 and the pumping gear 121.

[0043] like Figures 2-6 As shown, a front plug plate 137 is slidably installed inside each of the three main inlet pipes 101, and a rear plug plate 136 is slidably installed inside each of the three main outlet pipes 102. A piston rod 109 is fixedly installed on the rear plug plate 136. The piston rod 109 is fixedly installed with the front plug plate 137, slidably installed with the main inlet pipe 101 and the main outlet pipe 102, and fixedly installed with the movable frame 110.

[0044] like Figures 2-6 As shown, the pumping mechanism also includes a fixed frame 127, on which a rotating connecting rod 118 is rotatably mounted, and a rotating gear 117 is fixedly mounted on the rotating connecting rod 118. A motor 114 is provided next to the sewage tank 104, and a motor gear 115 is fixedly mounted on the motor shaft of the motor 114. An input transmission belt 116 is wound around the motor gear 115 and the rotating gear 117. A reciprocating rod 119 is rotatably mounted on the rotating connecting rod 118, and a sliding frame 106 is rotatably mounted on the reciprocating rod 119.

[0045] like Figures 2-6 As shown, an electric cylinder 107 is fixedly installed on the sliding frame 106, an insertion frame 108 is fixedly installed on the output end of the electric cylinder 107, an insertion post 138 is fixedly installed on the insertion frame 108, a toggle frame 129 is fixedly installed on the sliding frame 106, a rear paddle 130 and a front paddle 131 are fixedly installed on the toggle frame 129, the insertion post 138 slides in the sliding frame 106, in the initial state, the insertion post 138 passes through three movable frames 110, and a connecting frame 128 is fixedly installed on the transverse transmission belt 126.

[0046] The rotation of motor 114 drives motor gear 115 to rotate. Motor gear 115 drives rotating gear 117 and rotating connecting rod 118 to rotate via input transmission belt 116. Rotating connecting rod 118 drives sliding frame 106, electric cylinder 107, insertion frame 108, insertion column 138, piston rod 109 and movable frame 110 to reciprocate through reciprocating rod 119. This allows the front plug plate 137 to slide reciprocally in the main inlet pipe 101 while the rear plug plate 136 slides reciprocally in the main outlet pipe 102. At the same time, sliding frame 106 drives actuating frame 129 to move, allowing sewage to flow into sewage tank 104. Large debris in the sewage is blocked by inclined filter plate 135, and then the sewage reaches below inclined filter plate 135.

[0047] First, the piston rod 109 moves away from the wastewater tank 104, causing the front plug plate 137 to move away from the wastewater tank 104 within the main inlet pipe 101. Wastewater from the wastewater tank 104 is then drawn into the main inlet pipe 101 and the inlet bend 113 via the inlet pipe 103. At this time, the pumping ball valve 134 is closed, the inlet ball valve 132 is open, and the filter ball valve 133 is closed. Simultaneously, the rear plug plate 136 moves away from the wastewater tank 104 within the main outlet pipe 102, pushing the water in the main outlet pipe 102 into the RO membrane 318. When the piston rod 109 reaches its furthest position from the wastewater tank 104, the front deflector 131 pushes the connecting frame 128 away from the wastewater tank 104. When the connecting frame 128 moves, the horizontal transmission belt 126 rotates clockwise, which in turn drives the filter gear 124 and filter ball valve 133 to rotate 90 degrees. At the same time, the horizontal transmission belt 126 drives the rear gear 125, the pumping ball valve 134 and the pumping gear 121 to rotate 90 degrees. The pumping gear 121 drives the entry gear 122 and the entry ball valve 132 to rotate 90 degrees through the oblique transmission belt 123. At this time, the pumping ball valve 134 and the filter ball valve 133 are opened, and the entry ball valve 132 is closed. This process draws water from the sewage tank 104 into the main inlet pipe 101 and pushes water out of the main outlet pipe 102. At this time, the one-way plate 310 and the one-way column 311 are pushed downward, and the one-way spring 312 is compressed. The sewage enters the bottom cavity 319 through the one-way frame 309.

[0048] Subsequently, piston rod 109 moves toward sewage tank 104, causing front plug plate 137 to move toward sewage tank 104 within main inlet pipe 101. At this time, pumping ball valve 134 and filter ball valve 133 are open, while inlet ball valve 132 is closed. Front plug plate 137 pushes water from main inlet pipe 101 and filter ball valve 133 into coarse filter housing 203. Simultaneously, rear plug plate 136 moves toward sewage tank 104 within main outlet pipe 102, drawing sewage that has undergone preliminary filtration into main outlet pipe 102 through outlet bend 111. When piston rod 109 reaches its closest position to sewage tank 104, rear deflector 130 pushes connecting bracket 12. 8 moves towards the sewage tank 104. The connecting frame 128 drives the horizontal transmission belt 126 to rotate counterclockwise. The horizontal transmission belt 126 drives the filter gear 124 and the filter ball valve 133 to rotate 90 degrees. At the same time, the horizontal transmission belt 126 drives the rear gear 125, the pumping ball valve 134 and the pumping gear 121 to rotate 90 degrees. The pumping gear 121 drives the entry gear 122 and the entry ball valve 132 to rotate 90 degrees through the oblique transmission belt 123. At this time, the pumping ball valve 134 and the filter ball valve 133 are closed, and the entry ball valve 132 is opened. In this process, the water in the main inlet pipe 101 is pumped into the filter mechanism, and the water in the filter mechanism is pumped into the main outlet pipe 102, and so on.

[0049] When the wastewater volume is large, the electric cylinder 107 is in a fully retracted state. At this time, the insertion column 138 is inserted into the three movable frames 110. When the wastewater volume is small, the electric cylinder 107 can extend, driving the insertion frame 108 and the insertion column 138 to move. After the insertion column 138 is pulled out from the movable frame 110, when the sliding frame 106 and the insertion column 138 reciprocate, they will not drive the movable frame 110 and the piston rod 109 that have already pulled out the insertion column 138 to move. At most, the insertion column 138 can be pulled out from two movable frames 110. At this time, the movement of the sliding frame 106 will only drive one piston rod 109 and the movable frame 110 to move, and the wastewater volume is minimized.

[0050] like Figure 7 , Figure 8 As shown, the filtration mechanism includes a fine filter housing 201 fixedly installed on the filter valve body 112. Three filter tubes 202 are fixedly installed on the fine filter housing 201 by bolts. A coarse filter housing 203 is fixedly installed on the filter tubes 202. The filter tubes 202 are fixedly installed to the filter valve body 112 by bolts. The coarse filter housing 203 is fixedly installed to the water pumping valve body 120. Three ultrafiltration membrane filter elements 205 are fixedly installed inside the fine filter housing 201 by threads. The three ultrafiltration membrane filter elements 205 are located in three independent spaces inside the fine filter housing 201. Three pull-out racks 206 are fixedly installed inside the coarse filter housing 203 by bolts. An inner partition 204 is fixedly installed on the pull-out rack 206. Activated carbon and PP cotton are respectively arranged on both sides of the inner partition 204.

[0051] When the sewage is pushed into the coarse filter shell 203 from the main inlet pipe 101, the residual chlorine, organic matter, odor and particulate impurities in the sewage are removed by the activated carbon and PP cotton in the inner baffle 204. Then the sewage enters the ultrafiltration membrane filter element 205 through the filter pipe 202. The ultrafiltration membrane filter element 205 removes bacteria, viruses, colloids and macromolecular organic matter in the sewage. Then the sewage is pumped into the outlet bend pipe 111 and the main outlet pipe 102.

[0052] When the activated carbon and PP cotton inside the extraction rack 206 need to be replaced, simply remove the bolts connecting the extraction rack 206 to the coarse filter housing 203 to remove the extraction rack 206 from the coarse filter housing 203 for easy maintenance and replacement. When the ultrafiltration membrane filter element 205 needs to be replaced, remove the bolts between the fine filter housing 201 and the filter valve body 112 and the filter tube 202, remove the fine filter housing 201, and then manually unscrew the ultrafiltration membrane filter element 205 from the fine filter housing 201 to replace the ultrafiltration membrane filter element 205. After that, the fine filter housing 201 is installed back between the filter tube 202 and the filter valve body 112 for convenient maintenance.

[0053] like Figures 9-12As shown, the processing mechanism includes a rotating filter cylinder 301 rotatably mounted on the main discharge pipe 102. A rotating disk 302 is fixedly mounted on the rotating filter cylinder 301 by bolts. A downward push rod 308 is slidably mounted inside the main discharge pipe 102. The downward push rod 308 is fixedly mounted to the movable frame 110. A push ring 313 is fixedly mounted on the downward push rod 308. The push ring 313 is provided with multiple water passage grooves. A sliding column 315 is slidably mounted on the push ring 313. An end push plate 314 and an opening ring 316 are fixedly mounted on the sliding column 315. An opening spring 317 is provided between 316 and the push ring 313. An RO membrane 318 is fixedly installed inside the rotating filter cylinder 301. Multiple long grooves are provided on the rotating filter cylinder 301. A bottom cavity 319 is provided inside the main push pipe 102. The outer diameter of the push ring 313 is the same as the diameter of the bottom cavity 319. In normal state, the end push plate 314 is in contact with the push ring 313. The end push plate 314 closes the water passage groove on the push ring 313. The opening spring 317 is in an unforced state. The outside of the rotating filter cylinder 301 is connected to the external water outlet pipe.

[0054] like Figures 9-12 As shown, a one-way frame 309 is fixedly installed inside the main ejector tube 102, a one-way column 311 is slidably installed on the one-way frame 309, a one-way plate 310 is fixedly installed on the one-way column 311, and a one-way spring 312 is provided between the one-way column 311 and the one-way frame 309.

[0055] like Figures 9-12 As shown, a drain valve housing 303 is rotatably mounted on the rotating disk 302, and a drain ball valve 307 is rotatably mounted inside the drain valve housing 303. The drain ball valves 307 inside the three drain valve housings 303 are fixedly mounted, and a drain handle 304 is fixedly mounted on the outer drain ball valve 307. A precision valve housing 305 is fixedly mounted on the drain valve housing 303. The precision valve housing 305 has an internal thread, and a threaded rod 306 is rotatably mounted on the precision valve housing 305 through the thread. The precision valve housing 305 is connected to an external wastewater pipe.

[0056] Rotating the drain handle 304 can drive the drain ball valve 307 to rotate, thereby adjusting the flow rate of concentrated water at the end of the rotating filter cartridge 301. Rotating the threaded rod 306 can raise the threaded rod 306, thereby finely adjusting the flow rate of concentrated water. Through the synchronous adjustment of the threaded rod 306 and the drain handle 304, the flow rate of concentrated water can be finely adjusted, that is, the filtration ratio can be finely adjusted. When the movable frame 110 and the push rod 308 move towards the sewage tank 104, the water in the rotating filter cartridge 301 and the RO membrane 318 is pushed forward by the end push plate 314 and the push ring 313. The thrust applies pressure to the sewage. After the sewage is filtered by the RO membrane 318, it flows out from the external outlet pipe, and the concentrated water is discharged through the drain valve housing 303 and the precision valve housing 305.

[0057] When the movable frame 110 and the push rod 308 move away from the sewage tank 104, the opening ring 316, the push ring 313, and the end push plate 314 move towards the main push pipe 102. When the opening ring 316 enters the bottom cavity 319, the one-way plate 310 cannot move and keeps the one-way frame 309 closed. At this time, due to the high water pressure in the bottom cavity 319, the water pressure pushes the opening ring 316, the sliding column 315, and the end push plate 314 during the movement of the opening ring 316. 4. When the sliding motion is activated, the spring 317 is compressed. At this time, the end push plate 314 no longer closes the water passage of the push ring 313. The water in the bottom cavity 319 can enter the RO membrane 318 through the push ring 313. That is, all the water in the bottom cavity 319 reaches the front of the end push plate 314. When the next push rod 308 moves towards the sewage tank 104 with the end push plate 314 and the push ring 313, the end push plate 314 pushes out all the water in the RO membrane 318 and the bottom cavity 319. This process is repeated.

[0058] When maintenance of the RO membrane 318 is required, the rotating disk 302 and the rotating filter cartridge 301 can be rotated to change the position of the RO membrane 318 located directly below, preventing the RO membrane 318 from always being at the bottom and improving the lifespan of the RO membrane 318. When the RO membrane 318 needs to be replaced, the rotating filter cartridge 301 and the RO membrane 318 can be rotated to replace the RO membrane 318.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A maintenance-friendly reverse osmosis membrane wastewater treatment device, comprising an injection mechanism for continuously pumping wastewater to be treated into the device, characterized in that: The pumping mechanism includes three main pumping pipes (101) and three main pushing pipes (102). The pumping mechanism is equipped with a filtration mechanism for preliminary treatment of sewage and a treatment mechanism for reverse osmosis treatment of sewage. The pumping mechanism includes three movable frames (110), and each of the three main push pipes (102) has a water outlet bend (111) fixedly installed below it. A filter valve body (112) is fixedly installed on the water outlet bend (111). Each of the three main pumping pipes (101) has a water inlet bend (113) fixedly installed below it. A pumping valve body (120) is fixedly installed on the water inlet bend (113).

2. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 1, characterized in that: The pumping mechanism also includes a sewage tank (104), an inclined filter plate (135) is fixedly installed inside the sewage tank (104), the inclined filter plate (135) is provided with multiple slots, three water inlet pipes (103) are fixedly installed on the sewage tank (104), the bottom of the water inlet pipes (103) is located below the inclined filter plate (135), an inlet valve body (105) is fixedly installed on each of the three water inlet pipes (103), an inlet ball valve (132) is rotatably installed inside the inlet valve body (105), the three inlet ball valves (132) are fixedly installed between each other, an inlet gear (122) is fixedly installed on the outer inlet ball valve (132), and the inlet valve body (105) is fixedly installed with the main pumping pipe (101).

3. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 2, characterized in that: A filter ball valve (133) is rotatably installed inside the filter valve body (112). The filter ball valves (133) in the three filter valve bodies (112) are fixedly installed together. A filter gear (124) is fixedly installed on the outer filter ball valve (133). A pumping ball valve (134) is rotatably installed inside the pumping valve body (120). The pumping ball valves (134) in the three pumping valve bodies (120) are fixedly installed together. A rear gear (125) and a pumping gear (121) are fixedly installed on the two pumping ball valves (134) located on the outer side, respectively. A horizontal transmission belt (126) is wound around the filter gear (124) and the rear gear (125). An oblique transmission belt (123) is wound around the entry gear (122) and the pumping gear (121).

4. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 3, characterized in that: A front plug plate (137) is slidably installed inside each of the three main inlet pipes (101), and a rear plug plate (136) is slidably installed inside each of the three main outlet pipes (102). A piston rod (109) is fixedly installed on the rear plug plate (136). The piston rod (109) is fixedly installed with the front plug plate (137), and the piston rod (109) is slidably installed with the main inlet pipe (101) and the main outlet pipe (102). The piston rod (109) is fixedly installed with the movable frame (110).

5. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 4, characterized in that: The pumping mechanism also includes a fixed frame (127), on which a rotating connecting rod (118) is rotatably mounted, and a rotating gear (117) is fixedly mounted on the rotating connecting rod (118). A motor (114) is provided next to the sewage tank (104), and a motor gear (115) is fixedly mounted on the motor shaft of the motor (114). An input transmission belt (116) is wound around the motor gear (115) and the rotating gear (117). A reciprocating rod (119) is rotatably mounted on the rotating connecting rod (118), and a sliding frame (106) is rotatably mounted on the reciprocating rod (119).

6. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 5, characterized in that: An electric cylinder (107) is fixedly installed on the sliding frame (106). An insertion frame (108) is fixedly installed on the output end of the electric cylinder (107). An insertion post (138) is fixedly installed on the insertion frame (108). A toggle frame (129) is fixedly installed on the sliding frame (106). A rear paddle (130) and a front paddle (131) are fixedly installed on the toggle frame (129). The insertion post (138) slides inside the sliding frame (106). In the initial state, the insertion post (138) passes through three movable frames (110). A connecting frame (128) is fixedly installed on the transverse transmission belt (126).

7. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 1, characterized in that: The filtration mechanism includes a fine filter housing (201) fixedly installed on the filter valve body (112). Three filter tubes (202) are fixedly installed on the fine filter housing (201) by bolts. A coarse filter housing (203) is fixedly installed on the filter tubes (202). The filter tubes (202) are fixedly installed to the filter valve body (112) by bolts. The coarse filter housing (203) is fixedly installed to the water pumping valve body (120). Three ultrafiltration membrane filter elements (205) are fixedly installed inside the fine filter housing (201) by threads. The three ultrafiltration membrane filter elements (205) are located in three independent spaces inside the fine filter housing (201). Three pull-out racks (206) are fixedly installed inside the coarse filter housing (203) by bolts. An inner partition (204) is fixedly installed on the pull-out rack (206). Activated carbon and PP cotton are respectively arranged on both sides of the inner partition (204).

8. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 1, characterized in that: The processing mechanism includes a rotating filter cylinder (301) rotatably mounted on the main push pipe (102), a rotating disk (302) fixedly mounted on the rotating filter cylinder (301) by bolts, a downward push rod (308) slidably mounted inside the main push pipe (102), the downward push rod (308) being fixedly mounted to the movable frame (110), a push ring (313) fixedly mounted on the downward push rod (308), the push ring (313) having multiple water passage grooves, a sliding column (315) slidably mounted on the push ring (313), an end push plate (314) and an opening ring (316) fixedly mounted on the sliding column (315), and the opening ring... An opening spring (317) is provided between (316) and the push ring (313). An RO membrane (318) is fixedly installed inside the rotating filter cylinder (301). Multiple long grooves are provided on the rotating filter cylinder (301). A bottom cavity (319) is provided inside the main push pipe (102). The outer diameter of the push ring (313) is the same as the diameter of the bottom cavity (319). In normal condition, the end push plate (314) is in contact with the push ring (313). The end push plate (314) closes the water passage groove on the push ring (313). The opening spring (317) is in an unforced state. The outside of the rotating filter cylinder (301) is connected to the external water outlet pipe.

9. The easy-to-maintain reverse osmosis membrane wastewater treatment equipment according to claim 8, characterized in that: A one-way frame (309) is fixedly installed inside the main push tube (102), a one-way column (311) is slidably installed on the one-way frame (309), a one-way plate (310) is fixedly installed on the one-way column (311), and a one-way spring (312) is provided between the one-way column (311) and the one-way frame (309).

10. A reverse osmosis membrane wastewater treatment device that is easy to maintain according to claim 9, characterized in that: A drain valve housing (303) is rotatably mounted on the rotating disk (302). A drain ball valve (307) is rotatably mounted inside the drain valve housing (303). The drain ball valves (307) inside the three drain valve housings (303) are fixedly mounted. A drain handle (304) is fixedly mounted on the outer drain ball valve (307). A precision valve housing (305) is fixedly mounted on the drain valve housing (303). An internal thread is provided inside the precision valve housing (305). A threaded rod (306) is rotatably mounted on the precision valve housing (305) through the thread. The precision valve housing (305) is connected to an external wastewater pipe.

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