Control system for leachate conveying

Abstract

The utility model discloses a leachate conveying control system, which is used for controlling a leachate conveying system, and the leachate conveying system comprises a conveying device, an impurity stirring device, a blow-off pipe group and a cleaning device communicated with the impurity stirring device and the blow-off pipe group, the blow-off pipe group comprises a water outlet pipe, a drain pipe and a blow-off pipe; the cleaning device comprises a water supply pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe; comprising a controller, a first liquid level height detector, a first electric butterfly valve, a second electric butterfly valve, a third electric butterfly valve, a second electromagnetic valve and a third electromagnetic valve. The liquid level height detector, the electric butterfly valve and the electromagnetic valve which are connected with the controller are arranged to adjust the water outlet position, so that the corresponding positions of the conveying device, the impurity stirring device and the blow-off pipe set are flushed in good time, the blockage removal efficiency is improved, and the working intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of leachate treatment technology, and in particular to a control system for leachate transport. Background Technology

[0002] Leachate treatment in municipal solid waste incineration power plants has always been a very challenging problem in the design, operation, and management of these plants. Leachate in waste incineration power plants mainly originates from the moisture in the waste itself. It is a complex, high-concentration organic wastewater. Currently, during the filtration process, the leachate is often clogged by various types of waste from the leachate, causing the filtration system to frequently become blocked and paralyzed. This results in frequent leachate overflows, causing severe pollution to the site and seriously affecting normal production and the environment. The main reason for this is the static screen in the leachate filter. During the filtration process, floating debris clogs the screen, causing filtration paralysis. Manually clearing the blockage is not only labor-intensive but also poses certain safety hazards. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a control system for leachate transportation that is easy to adjust and use and can improve the efficiency of deblocking.

[0004] To solve the above-mentioned technical problems, the present invention provides a control system for leachate transportation, used to control a leachate transportation system. The leachate transportation system includes a transportation device, an impurity stirring device, and a sewage pipe assembly arranged sequentially along the transportation direction, as well as a cleaning device connected to both the impurity stirring device and the sewage pipe assembly. The sewage pipe assembly includes a water outlet pipe connected to the side of the impurity stirring device away from the transportation device, a drain pipe connected to the water outlet pipe, and a sewage pipe connected to the bottom of the impurity stirring device. The cleaning device includes a water supply pipe connected to a main water valve, a second connecting pipe connecting the water supply pipe and the sewage pipe, a third connecting pipe connecting the water supply pipe and the water outlet pipe, and a connecting... A fourth connecting pipe is provided between the water supply pipe and the end of the impurity stirring device near the conveying device; including a controller, a first liquid level detector disposed on the conveying device and used to detect the liquid level in the cylinder of the conveying device, a first electric butterfly valve disposed between the conveying device and the impurity stirring device, a second electric butterfly valve disposed between the water outlet pipe and the drain pipe, a third electric butterfly valve disposed on the sewage pipe, a second solenoid valve disposed on the second connecting pipe, and a third solenoid valve disposed on the water supply pipe at a section located between the second connecting pipe and the third connecting pipe. The first electric butterfly valve, the first liquid level detector, the second electric butterfly valve, the third electric butterfly valve, the second solenoid valve, and the third solenoid valve are all electrically connected to the controller.

[0005] The above structure, which includes a conveying device, an impurity stirring device, and a drain pipe assembly, is mainly used to handle larger impurities in the leachate, reducing the chance of blockage. If blockage occurs due to accumulation, a cleaning device is also provided, along with a liquid level detector, an electric butterfly valve, and a solenoid valve connected to the controller to adjust the water outlet position. This allows for timely flushing of the corresponding positions of the conveying device, impurity stirring device, and drain pipe assembly, and can accelerate the flow rate of the leachate, improving the efficiency of clearing blockages. The structure is simple and compact.

[0006] To improve the accuracy of liquid level detection, preferably, the first liquid level detector includes a plurality of first liquid level detectors spaced apart on the cylinder along the length direction of the cylinder. The first liquid level detector is an ultrasonic liquid level measuring instrument, and the plurality of ultrasonic liquid level detectors are electrically connected to the controller.

[0007] To facilitate water flow control and prevent waste, the cleaning device preferably includes a first connecting pipe that connects the water supply pipe and the drain pipe; the control system for leachate delivery also includes a first solenoid valve disposed on the first connecting pipe, the first solenoid valve being electrically connected to the controller.

[0008] To better prevent filter clogging, preferably, a filter device is also installed inside the water outlet pipe, and a second liquid level detector is also installed on a section of the water outlet pipe between the filter device and the impurity stirring device for detecting the liquid level in the pipe. The second liquid level detector is electrically connected to the controller.

[0009] To facilitate monitoring of liquid level changes in the direction of water flow and to expedite unblocking, preferably, a third annular water pipe is installed in a section of the water outlet pipe between the filter device and the impurity stirring device. Multiple third nozzles are connected and wound around the third annular water pipe, with the outlets of each nozzle angled towards the centerline of the third annular water pipe. A three-way valve is connected to the third connecting pipe, with its first end connected to the output end of the third connecting pipe and its second end connected to the third annular water pipe. The second liquid level detector is defined as an electrical contact level gauge connected to the third end of the three-way valve. The middle part of the electrical contact level gauge is connected to the water outlet pipe, and its lower part is connected to the drain pipe. A drain valve is located at the bottom of the electrical contact level gauge.

[0010] To simplify the structure of the cleaning device and facilitate installation, preferably, the first connecting pipe extends into the drain pipe, and the extended end of the first connecting pipe is provided with a vertically placed first annular water pipe. A first nozzle is connected to the lower end of the first annular water pipe, and the outlets of the first nozzles are all obliquely downward along the water outlet direction. The outlet end of the second connecting pipe is provided with a second annular water pipe wrapped around the outside of the sewage pipe. A second nozzle is provided in the second annular water pipe extending into the sewage pipe, and the outlets of the second nozzles are all obliquely downward. The fourth connecting pipe extends into the water inlet cylinder, and the extended end of the fourth connecting pipe is provided with a vertically placed fourth annular water pipe. A fourth nozzle is connected to one side of the fourth annular water pipe, and a fifth nozzle is connected to the other side. The outlets of the fourth and fifth nozzles are all obliquely facing the center line of the fourth annular water pipe.

[0011] To simplify the structure of the filtration device and facilitate installation, preferably, the filtration device includes two rows of driven gear sets on the upper end face of the outlet pipe. Each driven gear set includes seven driven gears arranged side by side and meshing sequentially. Each driven gear is connected to a filter shaft that extends vertically downward into the outlet pipe. The insertion end of the filter shaft is rotatably connected to the corresponding position at the lower end of the outlet pipe. A transmission gear is meshed between the two driven gear sets. A guide rail fixed to the outlet pipe is provided on each side of the transmission gear. A first guide block and a second guide block are staggered on the two guide rails. A tooth groove is provided on one side of each of the two guide blocks. The tooth groove meshes with the transmission gear. The first guide block is connected to the output end of an electric top cylinder fixed to the outlet pipe. The electric top cylinder is connected to a controller.

[0012] To facilitate maintaining the pressure balance of the internal air at the leachate delivery location, it is preferable to provide a first flexible hose connecting the cylinder and the inlet cylinder, and a second flexible hose connecting the outlet pipe and the drain pipe.

[0013] To simplify the structure and avoid the accumulation of leachate residue, the conveying device preferably includes shaftless helical blades disposed inside the cylinder along the length of the cylinder, and a drive motor disposed outside one end of the cylinder and connected to one end of the shaftless helical blades. The two ends of the shaftless helical blades are rotatably disposed inside the cylinder through a first bracket and a second bracket, respectively. The drive motor is electrically connected to the controller.

[0014] To simplify the structure and facilitate leachate discharge, the impurity stirring device preferably includes a housing and a drive shaft located inside the housing. A fixing frame is provided inside the housing, and a slot is provided in the middle of the fixing frame. One end of the drive shaft is provided with a ball joint, and the other end extends out of the housing. The ball joint is inserted into the slot. A wheel is provided at the end of the drive shaft. The wheel is connected to the output end of a drive motor fixed on the housing by a belt. The drive motor is connected to a controller. A blade holder assembly is fitted on the drive shaft.

[0015] Beneficial effects: This utility model sets up a liquid level detector, an electric butterfly valve, and a solenoid valve connected to the controller to adjust the position of the water outlet, so as to flush the corresponding positions of the conveying device, the impurity stirring device, and the sewage pipe group in a timely manner, thereby improving the efficiency of unblocking and reducing the workload. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the control principle of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model.

[0019] Figure 3 for Figure 2 EE section view in the image.

[0020] Figure 4 for Figure 2 Enlarged view of point K in the image.

[0021] Figure 5 This is a schematic diagram of the impurity crushing device.

[0022] Figure 6 for Figure 5 The left view.

[0023] Figure 7 This is a schematic diagram of the outer shell.

[0024] Figure 8 This is a schematic diagram of the tool holder assembly.

[0025] Figure 9 This is a schematic diagram of the first tool holder.

[0026] Figure 10 This is a schematic diagram of the structure of the first blade.

[0027] Figure 11 This is a schematic diagram of the second tool holder.

[0028] Figure 12 This is a schematic diagram of the second blade.

[0029] Figure 13 This is a schematic diagram of the third tool holder.

[0030] Figure 14 This is a schematic diagram of the third blade.

[0031] Figure 15 This is a schematic diagram of the fourth tool holder.

[0032] Figure 16 This is a schematic diagram of the fourth blade.

[0033] Figure 17 This is a schematic diagram of the auger blade sleeve.

[0034] Figure 18 for Figure 2 The view from direction D in the diagram.

[0035] Figure 19 for Figure 16 Enlarged view of point H in the image.

[0036] Figure 20 for Figure 2 BB view in the middle.

[0037] Figure 21 for Figure 2 AA section view in the image.

[0038] Figure 22 for Figure 2 FF view in the middle.

[0039] Figure 23 for Figure 18 CC section view in the image.

[0040] Figure 24 for Figure 2Enlarged view of point G in the image.

[0041] The meanings of the labels in the attached diagram are as follows:

[0042] Cylinder-1; First electric butterfly valve-10; First hose-12; Fixing bracket-13; Guide pipe-130; Switch valve-131; Drive shaft-14; Ball joint-141; Rotary wheel-142; Second hose-15; Ultrasonic liquid level measuring instrument-2; Second electric butterfly valve-20;

[0043] First bracket - 21; Support sleeve - 210; Sewage pipe - 211; Connecting conical section - 220; Second bracket - 22; Water outlet pipe - 23; Fixing cylinder - 230; Conical section - 231; Columnar section - 232;

[0044] Shaftless spiral blade - 3; outer casing - 30; cylinder cover - 301; slot - 302; drive motor - 303; water inlet cylinder - 31; water outlet cylinder - 32; blade - 33; drive motor - 4; third electric butterfly valve - 40;

[0045] First tool holder - 51; Second tool holder - 52; Third tool holder - 53; Fourth tool holder - 54; Screwdriver blade sleeve - 55; First fixing sleeve - 511; First connecting rod - 512; First blade - 513; Second fixing sleeve - 521; Second connecting rod - 522; Second blade - 523; Third fixing sleeve - 531; Third connecting rod - 532; Third blade - 533; Fourth fixing sleeve - 541; Fourth connecting rod - 542; Fourth blade - 543;

[0046] Driven gear - 61; Filter shaft - 62; Transmission gear - 63; Guide rail - 64; First guide block - 651; Second guide block - 652; Electric top cylinder - 66; Water supply pipe - 7; Main water valve - 70; First connecting pipe - 71; Second connecting pipe - 72; Third connecting pipe - 73; Fourth connecting pipe - 74; First solenoid valve - 710; Second solenoid valve - 720; Third solenoid valve - 730; First annular water pipe - 711; First nozzle - 712; Second annular water pipe - 721; Second nozzle - 722; Third connecting pipe - 73; Three-way valve - 731; Third annular water pipe - 732; Third nozzle - 733; Fourth connecting pipe - 74; Fourth annular water pipe - 741; Fourth nozzle - 742; Fifth nozzle - 743; Electric contact level gauge - 8; Level gauge drain valve - 81; Drain pipe - 9. Detailed Implementation

[0047] Depend on Figures 1 to 24 As shown, this utility model is used to control a leachate conveying system. The leachate conveying system includes a conveying device, an impurity stirring device, and a sewage discharge pipe group arranged sequentially along the conveying direction, as well as a cleaning device that is connected to both the impurity stirring device and the sewage discharge pipe group.

[0048] Specifically, the conveying device includes a cylindrical body 1, two ultrasonic liquid level measuring instruments 2 spaced apart on the cylindrical body 1 along its length, a spiral propeller disposed inside the cylindrical body 1 along its length, and a drive motor 4 disposed outside one end of the cylindrical body 1 and connected to one end of the spiral propeller. The two ends of the spiral propeller are respectively disposed inside the cylindrical body 1 via a first bracket 21 and a second bracket 22. The spiral propeller includes shaftless spiral blades 3, and a hollow support sleeve 210 is provided on the first bracket 21. A connecting cone section 220 is provided at one end of the shaftless spiral blade 3 corresponding to the first bracket 21, and the connecting cone section 220 is sleeved in the support sleeve 210; a hollow fixing cylinder 230 is provided on the second bracket 22, and a cone section 231 is provided at one end of the shaftless spiral blade 3 corresponding to the second bracket 22, and a cylindrical section 232 is also provided on the cone section 231, the cone section 231 is sleeved in the fixing cylinder 230, and the cylindrical section 232 is connected to the output end of the drive motor 4; the drive motor 4 and the two ultrasonic liquid level detectors 2 are all electrically connected to the controller.

[0049] The impurity stirring device includes a housing 30, a stirring mechanism disposed inside the housing 30, a water inlet cylinder 31 disposed on the side wall of the housing 30 and connected to the water outlet, a water outlet cylinder 32 disposed on the side wall of the housing 30 and connected to a water outlet pipe 23, and a drain outlet disposed on the bottom wall of the housing 30. A guide pipe 130 is provided at the drain outlet, and a switch valve 131 is provided on the guide pipe 130.

[0050] Nine blades 33 are spirally arranged at equal intervals on the inner wall of the outer casing 30. The upper end of the outer casing 30 is provided with a cylindrical cover 301, and the lower end is connected to a drain pipe 211. A fixing frame 13 is provided inside the outer casing 30, and a slot 302 is provided in the middle of the fixing frame 13. A drive shaft 14 is provided on the fixing frame 13. One end of the drive shaft 14 is provided with a ball joint 141, and the other end passes through the cylindrical cover 301. The ball joint 141 is inserted into the slot 302. The end of the drive shaft 14 is provided with a rotating wheel 142. The rotating wheel 142 is connected to the output end of the drive motor 303 by a belt. The drive motor 303 is connected to a controller.

[0051] A tool holder assembly is fitted onto the drive shaft 14. The tool holder assembly includes a first tool holder 51, a second tool holder 52, a third tool holder 53, and a fourth tool holder 54 arranged sequentially from bottom to top. A auger blade sleeve 55 is provided between each adjacent pair of tool holders. The first tool holder 51 includes a first fixing sleeve 511, on which three horizontally extending first connecting rods 512 are evenly arranged along the circumferential direction. First blades 513 are screwed onto the first connecting rods 512. The second tool holder 52 includes a second fixing sleeve 521, on which three horizontally extending first connecting rods 512 are evenly arranged along the circumferential direction. The third tool holder 53 includes a third fixing sleeve 531, on which three horizontally extending third connecting rods 532 are evenly arranged in the circumferential direction, and third blades 533 are screwed onto the third connecting rods 522; the fourth tool holder 54 includes a fourth fixing sleeve 541, on which three horizontally extending fourth connecting rods 542 are evenly arranged in the circumferential direction, and fourth blades 543 are screwed onto the fourth connecting rods 542.

[0052] A sleeve is provided in the middle of each of the three auger blade sleeves 55, and a strip-shaped positioning pin is provided on the drive shaft 14. Positioning grooves are provided on the inner sidewalls of the three sleeves and the four fixed sleeves at the positions corresponding to the strip-shaped positioning pins. The positioning grooves are fitted on the outside of the strip-shaped positioning pins so that the drive shaft 14 can drive the three auger blade sleeves 55 and the four tool holders to rotate synchronously.

[0053] A filter device is also installed inside the water outlet pipe 23. The filter device includes two rows of driven gear sets on the upper end face of the water outlet pipe 23. Each driven gear set includes seven driven gears 61 arranged side by side and meshing sequentially. Each driven gear 61 is connected to a filter shaft 62 that extends vertically downward into the water outlet pipe 23. The insertion end of the filter shaft 62 is rotatably connected to the corresponding position at the lower end of the water outlet pipe 23. A transmission gear 63 meshes between the two driven gear sets. A guide rail 64 fixed on the water outlet pipe 23 is provided on each side of the transmission gear 63. A first guide block 651 and a second guide block 652 are staggered on the two guide rails 64. A tooth groove is provided on one side of each of the two guide blocks. The tooth groove meshes with the transmission gear 63. The first guide block 651 is connected to the output end of an electric top cylinder 66 fixed on the water outlet pipe 23. The electric top cylinder 66 is connected to a controller.

[0054] The sewage pipe assembly includes an outlet pipe 23 connected to the side of the impurity stirring device away from the conveying device, a drain pipe 9 connected to the outlet pipe 23, and a sewage pipe 211 connected to the bottom of the impurity stirring device; the cleaning device includes a water supply pipe 7 connected to a main water valve 70, and a first connecting pipe 71, a second connecting pipe 72, a third connecting pipe 73, and a fourth connecting pipe 74 sequentially connected along the water outlet direction on the water supply pipe 7. A first solenoid valve 710 is provided on the first connecting pipe 71, a second solenoid valve 720 is provided on the second connecting pipe 72, and a third solenoid valve 730 is provided on the third connecting pipe 73. The third solenoid valve 730 is also connected to the fourth connecting pipe 74; the main water valve 70, the first solenoid valve 710, the second solenoid valve 720, and the third solenoid valve 730 are electrically connected to the controller.

[0055] Specifically, the first connecting pipe 71 extends into the drain pipe 9. The extended end of the first connecting pipe 71 is provided with a vertically placed first annular water pipe 711. A first nozzle 712 is connected to the lower end of the first annular water pipe 711, and the outlets of the first nozzles 712 are all obliquely downwards along the water outlet direction. The outlet end of the second connecting pipe 72 is provided with a second annular water pipe 721 wrapped around the outside of the sewage pipe 211. A second nozzle 722 extends into the sewage pipe 211 from the second annular water pipe 721, and the outlets of the second nozzles 722 are all obliquely downwards. A third annular water pipe 732 is provided in a section of the outlet pipe 23 located between the filter device 6 and the impurity stirring device. Multiple third nozzles 733 are connected and wound around the third annular water pipe 732, and the outlets of the third nozzles 733 are all obliquely facing the center line of the third annular water pipe 732. The third connecting pipe 73... A three-way valve 731 is connected, with its first end connected to the output end of the third connecting pipe 73 and its second end connected to the third annular water pipe 732; the second liquid level detector is defined as an electric contact level gauge 8 connected to the third end of the three-way valve 731, with its middle part connected to the outlet pipe 23 and its lower part connected to the drain pipe 211, and a level gauge at the bottom of the electric contact level gauge 8. The drain valve 81 is electrically connected to the controller via the electrical contact level gauge 8. The fourth connecting pipe 74 extends into the water inlet cylinder 31. The extended end of the fourth connecting pipe 74 is provided with a vertically placed fourth annular water pipe 741. A fourth nozzle 742 is connected to one side of the fourth annular water pipe 741, and a fifth nozzle 743 is connected to the other side. The outlets of the fourth nozzle 742 and the fifth nozzle 743 are both angled toward the center line of the fourth annular water pipe 741.

[0056] In addition, the first electric butterfly valve 10 located between the cylinder 1 and the inlet cylinder 31, the second electric butterfly valve 20 located between the outlet pipe 23 and the drain pipe 9, and the third electric butterfly valve 40 located on the sewage pipe 211 are all electrically connected to the controller.

[0057] A first flexible hose 12 is provided between the cylinder 1 and the inlet cylinder 31, and a second flexible hose 15 is provided between the outlet pipe 23 and the drain pipe 9.

[0058] The working principle of this utility model is as follows:

[0059] like Figures 1 to 4 As shown, an ultrasonic liquid level measuring instrument 2 and a drive motor 4 connected to a PLC controller are installed on the cylinder 1. When the height of the accumulated material is low, the sound beam reflection time is long, and the PLC controller does not send a start command to the drive motor 4, so the leachate automatically flows down the cylinder 1. When the height of the accumulated material is high, the sound beam reflection time is short, and the ultrasonic liquid level measuring instrument 2 sends a signal to the PLC controller. The PLC controller then sends a start command to the drive motor 4 so that the screw propeller drives the shaftless screw blade 3 to rotate and move the accumulated material to the leachate tank, clearing the cylinder 1 in a timely manner. When the height of the accumulated material decreases to a suitable height, the sound beam reflection time becomes longer again, and the PLC controller sends a stop command to the drive motor 4. The screw propeller then shuts down, the shaftless screw blade 3 stops rotating, and the leachate continues to flow down the cylinder 1 automatically.

[0060] It should be noted that the controller only selects the minimum value of the two ultrasonic liquid level measuring instruments 2 for the length of the sound beam reflection time. That is, when the reflection time is the shortest and the accumulation height is reached, a signal is sent to the controller, and the controller then sends a start command to the drive motor 4. When the accumulation height decreases, a signal is only sent to the controller when the reflection time of both ultrasonic liquid level measuring instruments 2 returns to a longer value, and the controller then sends a stop command to the drive motor 4. In addition, the structure of the shaftless spiral blade 3 can prevent plastic bags, cloth strips and other garbage from getting entangled in the shaft core.

[0061] like Figures 5 to 17As shown, after the leachate enters the outer casing 30 through the inlet cylinder 31, the controller starts the drive motor 303. The drive shaft 14 drives the four cutter holders and three auger blade sleeves 55 to rotate together, and also drives the sewage to rotate. The blades on the four cutter holders cut the waste residue in the sewage during rotation. It should be noted that although the cutting edge direction of the first blade 513, the second blade 523, the third blade 533 and the fourth blade 543 are all in the same direction as the rotation of the drive shaft 14, the sewage flow velocity in the outer ring away from the drive shaft 14 will decrease. The rotational speed of the drive shaft 14 remains constant, meaning the cutting speed of the twelve blades remains constant. The resulting speed difference effectively crushes the waste residue, and the leachate that meets the filtration standard flows out through the filter. It should be noted that nine blades 33 are arranged in a spiral at equal intervals on the inner wall of the outer cylinder 1, which work in conjunction with the blades on the blade holder to further crush the waste residue, thereby achieving the purpose of refining the waste residue and preventing the leachate from clogging. In addition, since a drain pipe 211 is installed, it can quickly remove blockages in case of poor drainage or the need for cleaning.

[0062] At the same time, such as Figures 18 to 20 As shown, the controller activates the electric top cylinder 66 to reciprocate, which also drives the first guide block 651 to reciprocate synchronously in the horizontal direction. One side of the first guide plate 651 is meshed with a transmission gear 63. On one side of the transmission gear 63, two sets of driven gears (not shown) are meshed with each other, and the other side is meshed with the second guide plate 652. Each driven gear set includes seven driven gears 61 arranged side-by-side and meshing sequentially. That is, the second guide plate 652 and the two sets of driven gears 61 also reciprocate synchronously with the transmission gear 63. The reciprocating rotation of the driven gears 61... The vertically mounted filter shaft 62 rotates back and forth. To avoid jamming, the frequency of the reciprocating rotation should be increased. This requires adjusting the extension and retraction frequency of the electric top cylinder 66. In this way, the reciprocating rotation of the filter shaft 62 creates a swirling flow in the gap between two adjacent filter shafts 62, which can create a surging flow in the gap and accelerate the rapid passage of leachate. If large pieces of impurities that have been crushed and leaked out move to the gap, they are less likely to cause jamming within a short stroke range. At the same time, it can quickly switch to reverse rotation to carry out larger impurities in the opposite direction, avoiding blockage of the gap between the filter shafts 62.

[0063] When cleaning is required, such as Figure 1 , Figure 2 , Figure 18 , Figures 21 to 24As shown, first, the first electric butterfly valve 10 and the second electric butterfly valve 20 are closed, and the third electric butterfly valve 40 is opened. At the same time, the drive motor 303 and the electric top cylinder 66 are turned on. The knife holder assembly rotates in one direction, and the filter shaft 62 rotates back and forth. Water then enters from the water supply pipe 7. When the water flows through the first connecting pipe 71, it is diverted and flows into the first annular water pipe 711 set in the drain pipe 9 along the first connecting pipe 71. It is then sprayed out from the seven first nozzles 712 to remove the residue at the location of the drain pipe 9. When the water flows through the second connecting pipe 72, it is diverted into the second annular water pipe 721 wrapped around the sewage pipe 211. It is then sprayed out from the second nozzle 722 that extends into the sewage pipe 211 to remove the residue in the sewage pipe 211 and flows to the drain pipe 9 for discharge.

[0064] In sequence, the water flows through the third connecting pipe 73 and then splits into two streams at the three-way valve 731. One stream flows into the third annular water pipe 732 located in the water outlet cylinder 32 and is sprayed out by the third nozzle 733. The outlets of the third nozzles 733 are all angled towards the center line of the third annular water pipe 732, that is, the water outlet direction is all angled downward towards the filter shaft 62. The water sprayed by the third nozzles 733, together with the reciprocating rotation of the filter shaft 62, can achieve a better cleaning purpose. The other stream of water flows into the electric contact level gauge 8. The water flowing into the electric contact level gauge 8 flows into the drain pipe 211 and merges with the water flowing down from the outer casing 30. During this process, the leachate and the cleaning water accumulate in the outer casing 30 and the water outlet cylinder 32 so that the rotation of the blade assembly and the filter shaft 62 can drive the water flow and also move the impurities in the leachate so as to better break them up and discharge them.

[0065] When water flows through the fourth connecting pipe 74, it flows into the fourth annular water pipe 741 and is simultaneously sprayed out by the fourth nozzle 742 and the fifth nozzle 743. The fourth nozzle 742 directly washes the rotating knife holder assembly, while the fifth nozzle 743 directly washes the position of the first electric butterfly valve 10 between the cylinder 1 and the water inlet cylinder 31.

[0066] As the inflow of water increases, the electric contact level gauge 8 displays the water level inside the housing 30. If large particles of waste enter the electric contact level gauge 8, the drain valve 81 of the level gauge can be opened to remove them. Similarly, if a blockage occurs inside the housing 30, the switch valve 131 on the guide pipe 130 can be opened to remove the blockage. In addition, the air inside the housing 30 and the outlet pipe 23 is discharged simultaneously through the second hose 15 and the first hose 12, so the water level inside the housing 30 and the outlet pipe 23 will not be affected by the air pressure. When the electric contact level gauge 8 shows that the water level has reached the high level, the water supply pipe 7 is closed, and the blade assembly and filter shaft 62 continue to rotate to crush the residual waste in the water. After rotating and rinsing for a period of time, the electric butterfly valve connected to the cylinder 1, the drain pipe 9 and the drain pipe 211 is opened to discharge the cleaned water.

[0067] If further cleaning is required, when the electric contact level gauge 8 shows a low water level, the controller will close the first electric butterfly valve 10 and the second electric butterfly valve 20 again, and open the water supply pipe 7 to inject water. Repeat the above-mentioned usage steps until the cleaning standard is met. Combined with the ultrasonic liquid level measuring instrument 2 previously installed on the cylinder 1 to monitor the liquid level of the sewage, the flow status of the leachate can be monitored in real time, so that the device can filter and self-clean simultaneously. The structure is simple and compact, and it is convenient and flexible to use.

[0068] The above operating principle can be summarized in the following steps:

[0069] 1) When the leachate enters the conveying device and the ultrasonic liquid level measuring instrument 2 measures the liquid level to be normal, the first electric butterfly valve 10 and the second electric butterfly valve 20 are opened, and the third electric butterfly valve 40 and the cleaning device are closed; the drive motor 303 and the electric top cylinder 66 remain in the normally open state, so that the knife holder assembly and the filter shaft 62 can achieve real-time dynamic treatment of the leachate.

[0070] 2) When the ultrasonic liquid level measuring instrument 2 measures a liquid level exceeding the preset detection liquid level height, the controller issues a command to close the second electric butterfly valve 20, while the third electric butterfly valve 40 remains closed. The knife holder assembly continues to work. At the same time, the controller issues a command to open the spiral blades 31 of the conveying device, accelerating the leachate towards the inlet cylinder 31. The main valve 70 and the third solenoid valve 730 are opened to accelerate the water volume and conveying speed. While the conveying device pushes the leachate into the outer casing 30, it also flushes the knife holder assembly and the leachate impurities in the drain pipe 211. During the process of the leachate level continuously rising, the second hose 15 balances the air pressure in the drain pipe 9 and the outlet pipe 23, and the first hose 12 balances the air pressure between the cylinder 1 and the inlet cylinder 31 to prevent negative pressure.

[0071] 3) Set a pre-set flushing time cycle on the controller. After the flushing time is up, the controller will issue a command to open the second electric butterfly valve 20 and the third electric butterfly valve 40 to discharge the leachate. If the ultrasonic liquid level measuring instrument 2 detects that the liquid level in the cylinder 1 has not fallen back to the preset detection liquid level height, then repeat step 2).

[0072] If the ultrasonic liquid level measuring instrument 2 detects that the liquid level in the cylinder 1 has fallen back to the preset detection liquid level height, it opens the first solenoid valve 710 and the second solenoid valve 720, and together with the third solenoid valve 730, it maintains the water supply flushing state to quickly flush the knife holder assembly, water outlet pipe 23, drain pipe 9 and sewage pipe 211, so as to assist the leachate to be quickly discharged from the water outlet pipe 23 and the sewage pipe 211 and reduce the impurities remaining in the leachate. At the same time, it closes the first electric butterfly valve 10 to stop pushing the leachate into the outer shell 30.

[0073] 4) When the liquid level gauge 8 detects that the liquid level has dropped to a safe position, the first electric butterfly valve 10 is opened. After the leachate level is maintained at a safe level for a certain period of time, the ultrasonic liquid level measuring instrument 2 sends a signal to the controller, and the controller issues an instruction to simultaneously close the main water valve 70, the first solenoid valve 710, the second solenoid valve 720, the third solenoid valve 730 and the third electric butterfly valve 40, while the first electric butterfly valve 10 and the second electric butterfly valve 20 remain open, and the normal delivery of leachate is restored in step 1).

[0074] It should be noted that in the above implementation steps, the electric contact level gauge 8 is connected to the controller. If the level of the leachate detected by the electric contact level gauge 8 exceeds half the depth of the cavity inside the housing 30, it indicates that debris has accumulated, slowing down the flow of the leachate. However, the ultrasonic level measuring instrument 2 is not triggered to monitor the leachate. Only the electric contact level gauge 8 sends a command to the controller, which then commands the second solenoid valve 720, the third solenoid valve 730, and the third electric butterfly valve 40 to flush the filter shaft 62, the blade assembly, and the drain pipe 211. After the liquid level drops, the second solenoid valve 720, the third solenoid valve 730, and the third electric butterfly valve 40 are closed. If the liquid level continues to rise and reaches the warning level monitored by the ultrasonic level measuring instrument 2, steps 2) to 4) are initiated.

[0075] In this utility model, the controller is a PLC controller. Since this utility model does not involve the controller program, but only directly uses the existing settings of the controller, the specific connection and settings of the PLC controller will not be described in detail.

Claims

1. A control system for leachate conveying, used to control a leachate conveying system, the leachate conveying system comprising a conveying device, an impurity stirring device, and a drain pipe assembly arranged sequentially along the conveying direction, and a cleaning device connected to both the impurity stirring device and the drain pipe assembly, the drain pipe assembly comprising an outlet pipe (23) connected to the side of the impurity stirring device away from the conveying device, a drain pipe (9) connected to the outlet pipe (23), and a drain pipe (211) connected to the bottom of the impurity stirring device; the cleaning device comprising a water supply pipe (7) connected to a main water valve (70), a second connecting pipe (72) connecting the water supply pipe (7) and the drain pipe (211), a third connecting pipe (73) connecting the water supply pipe (7) and the outlet pipe (23), and a fourth connecting pipe (74) connecting the water supply pipe (7) and the end of the impurity stirring device near the conveying device; characterized in that: The device includes a controller, a first liquid level detector installed on the conveying device for detecting the liquid level in the cylinder (1) of the conveying device, a first electric butterfly valve (10) installed between the conveying device and the impurity stirring device, a second electric butterfly valve (20) installed between the outlet pipe (23) and the drain pipe (9), a third electric butterfly valve (40) installed on the sewage pipe (211), a second solenoid valve (720) installed on the second connecting pipe (72), and a third solenoid valve (730) installed on the water supply pipe (7) located between the second connecting pipe (72) and the third connecting pipe (73). The first electric butterfly valve (10), the first liquid level detector, the second electric butterfly valve (20), the third electric butterfly valve (40), the second solenoid valve (720), and the third solenoid valve (730) are all electrically connected to the controller.

2. The control system for leachate delivery as described in claim 1, characterized in that: The first liquid level detector includes a plurality of first liquid level detectors spaced apart on the cylinder (1) along the length direction of the cylinder (1). The first liquid level detector is an ultrasonic liquid level measuring instrument (2). The plurality of ultrasonic liquid level detectors (2) are electrically connected to the controller.

3. The control system for leachate delivery as described in claim 1, characterized in that: The cleaning device further includes a first connecting pipe (71) connecting the water supply pipe (7) and the drain pipe (9); the control system for leachate delivery further includes a first solenoid valve (710) disposed on the first connecting pipe (71), and the first solenoid valve (710) is electrically connected to the controller.

4. The control system for leachate delivery as described in claim 2, characterized in that: A filter device is also provided inside the water outlet pipe (23). A second liquid level detector is also provided on a section of the water outlet pipe (23) between the filter device and the impurity stirring device for detecting the liquid level in the pipe. The second liquid level detector is electrically connected to the controller.

5. The control system for leachate delivery as described in claim 4, characterized in that: A third annular water pipe (732) is installed in a section of the water outlet pipe (23) between the filter device and the impurity stirring device. Multiple third nozzles (733) are wound around the third annular water pipe (732), with the outlets of the third nozzles (733) all angled towards the center line of the third annular water pipe (732). A three-way valve (731) is connected to the third connecting pipe (73), and the first end of the three-way valve (731) is connected to… The output end of the third connecting pipe (73) is connected to the second end and the third ring water pipe (732) is connected to the third end; the second liquid level detector is limited to an electric contact level gauge (8) connected to the third end of the three-way valve (731), the middle part of the electric contact level gauge (8) is connected to the water outlet pipe (23), the lower part of the electric contact level gauge (8) is connected to the sewage pipe (211), and the bottom of the electric contact level gauge (8) is provided with a level gauge sewage valve (81).

6. The control system for leachate transport as described in claim 3, characterized in that: The first connecting pipe (71) extends into the drain pipe (9). The end of the first connecting pipe (71) is provided with a vertically placed first annular water pipe (711). The lower end of the first annular water pipe (711) is connected to a first nozzle (712). The outlet of the first nozzle (712) is obliquely downward along the water outlet direction. The outlet of the second connecting pipe (72) is provided with a second annular water pipe (721) wrapped around the outside of the sewage pipe (211). The second annular water pipe (721) is provided with an extension into the sewage pipe (211). The second nozzle (722) has its outlet angled downwards; the fourth connecting pipe (74) extends into the water inlet cylinder (31), and the end of the fourth connecting pipe (74) is provided with a vertically placed fourth annular water pipe (741). A fourth nozzle (742) is connected to one side of the fourth annular water pipe (741), and a fifth nozzle (743) is connected to the other side. The outlets of the fourth nozzle (742) and the fifth nozzle (743) are both angled towards the center line of the fourth annular water pipe (741).

7. The control system for leachate transport as described in claim 4, characterized in that: The filter device (6) includes two rows of driven gear sets on the upper end face of the water outlet pipe (23). Each driven gear set includes seven driven gears (61) arranged side by side and meshed sequentially. Each driven gear (61) is connected to a filter shaft (62) that extends vertically downward into the water outlet pipe (23). The end of the filter shaft (62) is rotatably connected to the corresponding position at the lower end of the water outlet pipe (23). A transmission gear (63) meshes between two driven gear sets. Each side of the transmission gear (63) is provided with a guide rail (64) fixed on the water outlet pipe (23). A first guide block (651) and a second guide block (652) are provided on the two guide rails (64) in a staggered manner. One side of each of the two guide blocks is provided with a tooth groove, and the tooth groove is engaged with the transmission gear (63). The first guide block (651) is connected to the output end of the electric top cylinder (66) fixed on the water outlet pipe (23). The electric top cylinder (66) is connected to the controller.

8. The control system for leachate delivery as described in claim 7, characterized in that: A first flexible hose (12) is provided between the cylinder (1) and the inlet cylinder (31), and a second flexible hose (15) is provided between the outlet pipe (23) and the drain pipe (9).

9. The control system for leachate delivery as described in claim 2, characterized in that: The conveying device further includes a shaftless helical blade (3) arranged inside the cylinder (1) along the length direction of the cylinder (1), and a drive motor (4) arranged outside one end of the cylinder (1) and connected to one end of the shaftless helical blade (3). The two ends of the shaftless helical blade (3) are rotatably arranged inside the cylinder (1) through a first bracket (21) and a second bracket (22), respectively. The drive motor (4) is electrically connected to the controller.

10. The control system for leachate delivery as described in claim 1, characterized in that: The impurity stirring device includes a housing (30) and a drive shaft (14) disposed inside the housing (30). A fixing frame (301) is provided inside the housing (30), and a slot (302) is provided in the middle of the fixing frame (301). One end of the drive shaft (14) is provided with a ball joint (141), and the other end extends out of the housing (30). The ball joint (141) is inserted into the slot (302). The end of the drive shaft (14) is provided with a rotating wheel (142). The rotating wheel (142) is connected to the output end of a drive motor (303) fixed on the housing (30). The drive motor (303) is connected to a controller. A knife holder assembly is sleeved on the drive shaft (14).

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