Garbage can with solid-liquid separation function

Abstract

The invention relates to the technical field of garbage cans, in particular to a garbage can with a solid-liquid separation function, which comprises a garbage can body, a mounting cylinder is arranged in the garbage can body, a garbage inlet is formed in the middle of the mounting cylinder, an extrusion cylinder is rotatably arranged in the mounting cylinder, and a rotating mechanism for driving the extrusion cylinder to rotate is arranged at the mounting cylinder; an extrusion cylinder opening is formed in the extrusion cylinder, a pressing plate used for extruding and crushing garbage is arranged in the extrusion cylinder, a driving mechanism used for driving the pressing plate to move is arranged in the garbage can body, and a percolate discharging opening is formed in the end face, in the extrusion direction of the pressing plate, of the extrusion cylinder. According to the garbage can, active extrusion of garbage is achieved through cooperation of the extrusion barrel and the pressing plate, percolate in liquid-containing garbage such as kitchen garbage and soaked paper can be forcibly extruded out, the percolate enters the mounting barrel through the percolate discharging opening and then is collected into the percolate collecting barrel through the liquid discharging opening in a centralized mode, and the percolate is prevented from being accumulated in the garbage can.

Description

Technical Field

[0001] The present invention relates to the technical field of trash cans, in particular to a trash can with a solid-liquid separation function. Background Art

[0002] In today's society, as people's environmental awareness grows, their focus on public hygiene is also increasing. As public spaces like residential communities and parks are important areas for daily leisure and activities, the installation and use of trash cans plays a key role in maintaining a clean and tidy environment. However, existing public trash cans often have some issues that need to be addressed.

[0003] Currently, most public trash cans use a traditional single-chamber structure, lacking detailed waste sorting and processing, and are unable to effectively separate solid and liquid waste. In practice, various types of waste, including kitchen waste containing leachate and paper soaked in liquid, are mixed and discarded in the trash can. This not only results in a mixed solid-liquid state within the trash can, which is prone to bacterial growth and odor, polluting the surrounding air and affecting the user experience of residents and tourists, but also creates significant difficulties in subsequent waste disposal.

[0004] When garbage trucks collect trash from these bins, the large amount of leachate trapped inside cans can flow erratically during the dumping process, easily contaminating the outer walls of the bins and the surrounding ground. For example, in some residential communities, after garbage trucks clear the bins, they often leave behind pools of wastewater, which not only affects the aesthetics of the neighborhood but can also cause pedestrians to slip and pose a safety hazard. In places like parks, leachate leakage can also pollute soil and vegetation, damaging the ecological environment.

[0005] Furthermore, existing trash cans lack effective treatment measures for leachate from garbage. Leachate often contains large amounts of harmful substances such as organic matter, heavy metals, and pathogens. If discharged directly into the environment, it can cause serious pollution to water bodies and soil. Furthermore, the long-term accumulation of leachate in trash cans can accelerate corrosion, shorten their service life, and increase maintenance costs for public facilities.

[0006] For waste containing liquids, such as residual liquid in beverage bottles or soup in food packaging, it is difficult to achieve complete solid-liquid separation simply by relying on the weight of the waste itself. During the waste transfer and processing process, these residual liquids will continue to leak, causing many inconveniences to the entire waste treatment process.

[0007] In summary, developing a public trash can that can crush trash and effectively separate leachate from solid waste is of great practical significance. It not only improves public sanitation and reduces environmental pollution, but also reduces the difficulty and cost of waste disposal, improves its efficiency and quality, and meets people's demand for a high-quality living environment. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention is solved through the following technical solutions.

[0009] A trash can with a solid-liquid separation function comprises a trash can body, a mounting cylinder is provided in the trash can body, a trash inlet opening facing upward is provided in the middle of the mounting cylinder, an extrusion cylinder is rotatably provided in the mounting cylinder, and a rotating mechanism for driving the extrusion cylinder to rotate is provided at the mounting cylinder; an extrusion cylinder opening is provided at the extrusion cylinder, a pressure plate for extruding and crushing the trash is provided in the extrusion cylinder, a driving mechanism for driving the pressure plate to move is provided in the trash can body, a leachate discharge outlet is provided at the end face of the extrusion cylinder along the extrusion direction of the pressure plate, and a supporting mechanism for supporting the extrusion cylinder is provided at the mounting cylinder.

[0010] The mounting cylinder is also provided with a garbage discharge outlet opening downward, and a liquid discharge outlet is provided at the end of the mounting cylinder away from the garbage discharge outlet; the garbage discharge outlet and the garbage inlet are staggered along the axial direction of the mounting cylinder, and the extrusion cylinder can move along the axial direction of the mounting cylinder, and the driving mechanism can drive the extrusion cylinder to move so that the extrusion cylinder opening moves to the garbage discharge outlet to discharge the garbage in the extrusion cylinder.

[0011] As a preferred embodiment of the present invention, a mounting base is provided in the trash can body, and a connecting foot is provided at the bottom end of the mounting cylinder which is bolted to the mounting base. The driving mechanism includes an electric push rod arranged at the mounting base, and the end of the electric push rod piston rod passes through the side wall of the extrusion cylinder and extends into the extrusion cylinder. The end of the electric push rod piston rod extending into the extrusion cylinder is fixedly connected to the pressure plate.

[0012] As a preferred solution of the present invention, a cover plate is provided at the end of the mounting tube away from the driving mechanism, and a cover plate through hole is provided on the cover plate. The supporting mechanism includes a support column arranged in the cover plate through hole and gap-matched with the cover plate through hole, and a support column flange is provided at the end of the support column located in the mounting tube.

[0013] As a preferred solution of the present invention, the rotating mechanism includes a gear ring arranged at the support column, a drive motor is provided at the mounting base, and a gear meshing with the gear ring is provided at the rotating shaft of the drive motor; a support column through hole is provided at the support column, a strip groove is provided at the side wall of the support column through hole, a connecting column is provided at the end face of the extrusion cylinder near the support column, and the end bolt of the connecting column away from the extrusion cylinder is connected with a baffle that is gap-matched with the support column through hole, and a protrusion that is gap-matched with the strip groove is provided at the side wall of the baffle, and the end of the protrusion extends into the strip groove so that the support column drives the connecting column to rotate.

[0014] As a preferred solution of the present invention, a reset spring for resetting the extrusion cylinder is sleeved on the connecting column, and the inner wall of the support column through hole near the end of the extrusion cylinder shrinks inward to form a limiting flange, and the limiting flange and the baffle are used to jointly limit the spring in the support column through hole.

[0015] As a preferred embodiment of the present invention, a discharge through hole located below the garbage discharge outlet and a liquid discharge through hole located below the liquid discharge outlet are provided at the mounting base. The outer wall of the mounting cylinder extends from the garbage discharge outlet end to the discharge through hole end to form a discharge channel. The outer wall of the mounting cylinder extends from the liquid discharge outlet end to the liquid discharge through hole end to form a liquid discharge channel.

[0016] As a preferred embodiment of the present invention, a sealing sleeve for sealing the garbage inlet is provided on the end surface of the extrusion cylinder away from the driving mechanism.

[0017] As a preferred embodiment of the present invention, the mounting tube is tilted on the vertical plane, and the angle between the axis direction of the mounting tube and the horizontal plane is 4-8°; the height of the end where the garbage discharge outlet is located at the mounting tube is greater than the height of the end where the liquid discharge outlet is located at the mounting tube.

[0018] As a preferred solution of the present invention, a processing chamber is provided in the trash can body below the mounting base, and a trash collection bucket below the discharge hole and a leachate collection bucket below the liquid discharge hole are provided in the processing chamber.

[0019] As a preferred embodiment of the present invention, the trash can body further comprises a delivery port arranged above the mounting base, and a hopper for conveying the trash to the trash inlet is provided at the delivery port.

[0020] The beneficial effects of the present invention are: 1. The present invention realizes active squeezing of garbage through the cooperation of the squeezing cylinder and the pressing plate, which can forcibly squeeze out the leachate in liquid-containing garbage such as kitchen waste and soaked paper. The leachate enters the installation cylinder through the leachate discharge port and is then collected in the leachate collection barrel through the discharge port to avoid accumulation of leachate in the garbage barrel.

[0021] 2. The discharge channel and the liquid discharge channel in the present invention are designed independently, so that solid waste and leachate enter the waste collection bin and leachate collection bin respectively through their respective channels, which completely solves the problem of irregular leachate flow when traditional garbage bins are dumped.

[0022] 3. The support column in this embodiment serves as the axial support for the extrusion barrel, transmitting torque in conjunction with the rotation mechanism to achieve stable rotation of the extrusion barrel. The support column flange contacts the end face of the extrusion barrel, maintaining uniform force during rotation, avoiding jamming caused by excessive localized friction, ensuring precise positioning during the sealing phase, and improving the consistency of the solid-liquid separation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the trash can with solid-liquid separation function in Example 1; Figure 2 This is a cross-sectional view of the trash can with solid-liquid separation function in Example 1; Figure 3 This is a cross-sectional view of the trash can with solid-liquid separation function in Example 1; Figure 4 This is a schematic structural diagram of the mounting base and mounting tube in Example 1; Figure 5 A half-section view of the mounting base and the mounting cylinder in Example 1; Figure 6 A half-section view of the support column in Example 1; Figure 7 This is a schematic structural diagram of the extrusion cylinder in Example 1.

[0024] The reference numerals are as follows: 100, Trash Can Body; 110, Inlet; 120, Hopper; 130, Control Panel; 140, Start Button; 210, Mounting Cylinder; 211, Trash Inlet; 220, Extrusion Cylinder; 221, Extrusion Cylinder Opening; 230, Pressing Plate; 240, Leachate Drain; 250, Trash Drain; 260, Drainage Port; 270, Mounting Base; 280, Processing Chamber; 290, Trash Collection Barrel; 2100, Leachate Collection Barrel; 2110, Support Platform; 2110, Extrusion Chamber; 310 , electric push rod; 410, connecting foot; 510, cover plate; 520, cover plate through hole; 530, support column; 540, support column flange; 550, drive motor; 560, gear; 570, discharge through hole; 580, drainage through hole; 590, discharge channel; 5100, drainage channel; 610, gear ring; 620, support column through hole; 630, bar slot; 640, limiting flange; 710, connecting column; 720, baffle; 730, bump; 740, return spring; 750, sealing sleeve. DETAILED DESCRIPTION

[0025] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explaining the present invention and are not intended to limit the present invention.

[0026] Example 1, as Figure 1 - Figure 3 As shown, this embodiment provides a trash can with a solid-liquid separation function, which includes a trash can body 100, a support platform 2110 is provided in the trash can body 100, and a mounting base 270 is provided at the support platform 2110. The mounting base 270 and the support platform 2110 divide the inner cavity of the trash can body 100 into an extrusion cavity 2110 located above the mounting base 270 and a processing cavity 280 located below the mounting base 270.

[0027] A garbage inlet 211 opening upward is provided in the middle of the mounting cylinder 210 . The trash can body 100 further includes a delivery port 110 provided above the mounting base 270 . A hopper 120 for transporting garbage to the garbage inlet 211 is provided at the delivery port 110 .

[0028] An extrusion cylinder 220 is rotatably mounted in the mounting cylinder 210, and a rotating mechanism for driving the extrusion cylinder 220 to rotate is provided at the mounting cylinder 210; an extrusion cylinder opening 221 is provided at the extrusion cylinder 220, and a pressing plate 230 for squeezing and crushing garbage is provided in the extrusion cylinder 220; a driving mechanism for driving the pressing plate 230 to move is provided in the trash can body 100, and a leachate discharge port 240 is provided at the end surface of the extrusion cylinder 220 along the extrusion direction of the pressing plate 230; and a supporting mechanism for supporting the extrusion cylinder 220 is provided at the mounting cylinder 210; The mounting cylinder 210 is further provided with a garbage discharge outlet 250 opening downward, and a liquid discharge outlet 260 is provided at the end of the mounting cylinder 210 away from the garbage discharge outlet 250; the garbage discharge outlet 250 and the garbage inlet 211 are staggered along the axial direction of the mounting cylinder 210, and the extrusion cylinder 220 can move along the axial direction of the mounting cylinder 210, and the driving mechanism can drive the extrusion cylinder 220 to move so that the extrusion cylinder opening 221 moves to the garbage discharge outlet 250 to discharge the garbage in the extrusion cylinder 220.

[0029] A mounting tube 210 is provided at the mounting base 270 and is located in the extrusion cavity 2110. In this embodiment, the mounting tube 210 is tilted on the vertical plane, and the angle between the axial direction of the mounting tube 210 and the horizontal plane is 4-8 degrees; the height of the end of the mounting tube 210 where the garbage discharge outlet 250 is located is greater than the height of the end of the mounting tube 210 where the liquid discharge outlet 260 is located.

[0030] The trash can body 100 also includes a control system, centered around a PLC controller. Specifically, it includes: A main controller: A Siemens S7-1200 series PLC (model 1214CDC / DC / DC) with 14 inputs and 10 outputs, supporting pulse output and high-speed counting, is used to receive sensor signals and output control commands. A pressure detection unit: A strain gauge pressure sensor is built into the piston rod end of the electric actuator 310 to detect extrusion pressure. An operating unit: A control panel 130 is located on the outside of the trash can body 100, equipped with a start button 140 (with an indicator light). The PLC controller controls the drive motor 550 via a stepper motor driver (model DM542) to rotate and position the extrusion barrel 220. The PLC controller controls the extension and retraction of the electric actuator 310 via a relay module. The output signal is a 24V DC signal and supports overload protection (operating current 10A). The control system in this embodiment also includes a power supply module, which uses an AC220V to DC24V switching power supply to power the PLC control, sensors, and actuators.

[0031] During use, the user places garbage into the garbage inlet 211 through the hopper 120. The garbage then enters the extrusion barrel 220 through the extrusion barrel opening 221. The user presses the start button 140 on the control panel 130. After receiving the start signal, the PLC controller outputs a pulse signal to the driver of the drive motor 550, controlling the rotation of the drive motor 550. The drive motor 550 drives the support column 530 to rotate through the meshing of the gear 560 and the ring gear 610. The support column 530, through the engagement of the bar-shaped slot 630 and the protrusion 730, drives the extrusion barrel 220 to rotate synchronously until the extrusion barrel 220 rotates to seal against the garbage inlet 211.

[0032] After sealing is completed, the PLC controller outputs a signal to control the piston rod of the electric push rod 310 to extend. The piston rod pushes the pressure plate 230 to move along the axis of the extrusion cylinder 220, exerting extrusion force on the internal garbage. The pressure sensor detects the extrusion pressure in real time and feeds it back to the PLC controller. When the pressure reaches the set threshold, the PLC controls the electric push rod 310 to stop extending and maintain the pressure state (the holding time can be set by the PLC program, such as 5 seconds). During the extrusion process, the leachate in the garbage is discharged into the interior of the installation cylinder 210 through the leachate outlet 240 on the end face of the extrusion cylinder 220, flows along the inclined inner wall of the installation cylinder 210 to the drain port 260, and finally flows into the leachate collection barrel 2100 through the drainage channel 5100.

[0033] After the pressure hold is complete, the PLC controller controls the piston rod of the electric push rod 310 to retract in the opposite direction. Due to the connection between the electric push rod 310 and the extrusion barrel 220, the piston rod's retraction moves the extrusion barrel 220 along the axis of the mounting barrel 210, away from the leachate discharge outlet 240 (at this point, the return spring 740 is compressed). When the extrusion barrel 220 moves to the "discharge position," the extrusion barrel opening 221 aligns with the waste discharge outlet 250 of the mounting barrel 210, and the PLC controls the electric push rod 310 to stop retracting. At this point, the solid waste within the extrusion barrel 220, under the action of gravity, falls through the waste discharge outlet 250 into the discharge channel 590, ultimately entering the waste collection bin 290.

[0034] After discharge is complete, the PLC controller controls the extension of the piston rod of the electric push rod 310, driving the extrusion barrel 220 to move along the axis of the mounting barrel 210 toward the leachate discharge port 240 (the return spring 740 gradually releases its elastic force to assist in reset). When the extrusion barrel 220 moves to its initial axial position, the PLC controller controls the electric push rod 310 to stop extending. Subsequently, the PLC controls the drive motor 550 to reverse, driving the extrusion barrel 220 to rotate in the opposite direction until the extrusion barrel opening 221 returns to an angle aligned with the garbage inlet 211, at which point the drive motor 550 stops. Ultimately, the electric push rod 310 remains in its initial extension state, the pressure plate 230 returns to its initial position before extrusion, and the entire system returns to standby mode, awaiting the next work cycle.

[0035] The trash can with solid-liquid separation function in this embodiment realizes active squeezing of garbage through the cooperation of the squeezing cylinder 220 and the pressing plate 230, and can forcibly squeeze out the leachate in liquid-containing garbage such as kitchen waste and soaked paper. The leachate enters the installation cylinder 210 through the leachate discharge port 240, and is then collected into the leachate collection barrel 2100 through the discharge port 260 to avoid accumulation of leachate in the trash can.

[0036] The staggered design of the garbage discharge port 250 and the garbage inlet 211, combined with the sealing action of the extrusion cylinder 220 (the sealing sleeve 750 covers the garbage inlet 211), forms a closed extrusion space to prevent leakage of leachate during the extrusion process.

[0037] The independent design of the discharge channel 590 and the drainage channel 5100 allows solid waste and leachate to enter the waste collection bin 290 and the leachate collection bin 2100 respectively through their respective channels, completely solving the problem of irregular flow of leachate when dumping traditional garbage bins.

[0038] The volume of solid waste after extrusion is reduced (due to the removal of liquid and crushing), which reduces the number of garbage transfers and reduces transportation costs; at the same time, the moisture content of solid waste is reduced, which facilitates subsequent incineration or landfill treatment and reduces corrosion losses in treatment facilities.

[0039] After centralized collection, leachate can be treated in a targeted manner (e.g., before being pre-treated and fed into a sewage treatment system), preventing direct discharge from polluting soil and water bodies. This meets the requirements of prior art for reducing environmental pollution and lowering treatment costs. Furthermore, the stainless steel construction of the trash can 100 and its core components, combined with its leachate isolation design, extends its service life by 2-3 times compared to traditional trash cans, reducing the frequency of maintenance for public facilities.

[0040] The automatic sealing and discharging action of the extrusion barrel 220 (achieved by the control system in conjunction with the electric push rod 310 and the drive motor 550) reduces the frequency of manual contact with garbage and improves operational convenience.

[0041] In terms of odor control, the sealing sleeve 750 cooperates with the closed extrusion space to reduce the amount of garbage odor leakage by more than 70%; at the same time, the timely discharge of leachate avoids the corrosion odor of the barrel caused by long-term accumulation.

[0042] Combine Figure 5 - Figure 7 As shown, the mounting base 270 is provided with a discharge hole 570 located below the garbage outlet 250 and a liquid discharge hole 580 located below the liquid discharge port 260. The outer wall of the mounting cylinder 210 extends from the garbage outlet 250 to the discharge hole 570 to form a discharge channel 590, and the outer wall of the mounting cylinder 210 extends from the liquid discharge port 260 to the liquid discharge hole 580 to form a liquid discharge channel 5100. A sealing sleeve 750 is provided on the end surface of the extrusion cylinder 220 away from the drive mechanism to seal the garbage inlet 211. The garbage can body 100 is provided with a processing chamber 280 below the mounting base 270. The processing chamber 280 is provided with a garbage collection bucket 290 located below the discharge hole 570 and a leachate collection bucket 2100 located below the liquid discharge hole 580.

[0043] The discharge holes 570 and liquid drainage holes 580 on the mounting base 270 correspond to the discharge paths for solid waste and leachate, respectively. Together, these holes, along with the discharge channel 590 and liquid drainage channel 5100 extending from the outer wall of the mounting tube 210, completely separate the solid and liquid flow paths. This design avoids the problem of leachate and solid waste mixing in traditional trash cans. Instead, leachate flows along a closed channel into the leachate collection bin 2100, while solid waste falls through the discharge channel 590 into the trash collection bin 290. This fundamentally eliminates ground contamination caused by irregular leachate leakage.

[0044] The waste collection bin 290 and leachate collection bin 2100 within the processing chamber 280 physically separate solid and liquid waste, eliminating the need for secondary separation during subsequent processing. Compared to traditional waste bins that require manual sorting of liquids and solids, this reduces labor costs during waste disposal. Furthermore, centralized leachate collection facilitates subsequent harmless treatment (such as specialized treatment at a sewage treatment plant), reducing soil and water pollution.

[0045] The provision of the sealing sleeve 750 enables the sealing sleeve 750 to seal the garbage inlet 211 when the extrusion cylinder 220 moves to the "discharge position", thereby improving the stability of the garbage can with solid-liquid separation function during use.

[0046] The inclined design of the mounting tube 210 (the angle between the axis and the horizontal plane is 4-8 degrees) combined with the drainage channel 5100 allows the leachate to flow rapidly by gravity, reducing residue. Compared with the traditional garbage can that relies solely on the weight of the garbage to separate, it greatly improves the leachate separation efficiency and avoids the spread of odor and bacterial growth from the source.

[0047] Combine Figure 3 As shown, the bottom end surface of the mounting cylinder 210 is provided with a connecting foot 410 bolted to the mounting base 270, and the driving mechanism includes an electric push rod 310 arranged at the mounting base 270, and the end of the piston rod of the electric push rod 310 passes through the side wall of the extrusion cylinder 220 and extends into the extrusion cylinder 220, and the end of the piston rod of the electric push rod 310 extending into the extrusion cylinder 220 is fixedly connected to the pressure plate 230.

[0048] The mounting cylinder 210 is bolted to the mounting base 270 via the connecting legs 410, forming a stable support structure. The removable bolt connection facilitates installation and maintenance, while also ensuring that the mounting cylinder 210 remains stable during dynamic processes such as the rotation of the extrusion cylinder 220 and the squeezing of trash, thus avoiding the loosening problems associated with traditional trash cans due to welding or snap-on connections.

[0049] The piston rod of the electric push rod 310 is directly connected to the pressure plate 230, forming a linear "push rod-pressure plate" transmission chain. This eliminates intermediate transmission losses and efficiently converts thrust into compressive force on the waste. Compared to traditional passive compression methods that rely on gravity or springs, this system effectively crushes rigid packaging (such as plastic bottles) and compresses fibrous waste (such as soaked tissues). The piston rod of the electric push rod 310 passes through the side wall of the extrusion barrel 220, ensuring precise movement of the pressure plate 230 along the axis of the extrusion barrel 220 and preventing localized pressure loss due to misalignment. Combined with the tight fit of the pressure plate 230 against the inner wall of the extrusion barrel 220, the waste is compressed across its entire cross-section, further improving leachate removal efficiency and reducing dead zones.

[0050] Combine Figure 4 as well as Figure 5 As shown, a cover plate 510 is provided at the end of the mounting tube 210 away from the driving mechanism, and a cover plate through hole 520 is provided at the cover plate 510. The supporting mechanism includes a support column 530 arranged in the cover plate through hole 520 and gap-fitted with the cover plate through hole 520. The support column 530 is located in the mounting tube 210 and has a support column flange 540 at its end.

[0051] Combine Figure 6 Figure 7 As shown, the rotating mechanism includes a ring gear 610 arranged at the support column 530, a drive motor 550 is provided at the mounting base 270, and a gear 560 meshing with the ring gear 610 is provided at the rotating shaft of the drive motor 550; a support column through hole 620 is provided at the support column 530, and a strip groove 630 is provided at the side wall of the support column through hole 620, and a connecting column 710 is provided at the end face of the extrusion cylinder 220 near the support column 530, and a baffle 720 with a clearance fit with the support column through hole 620 is bolted to the end of the connecting column 710 away from the extrusion cylinder 220, and a protrusion 730 with a clearance fit with the strip groove 630 is provided on the side wall of the baffle 720, and the end of the protrusion 730 extends into the strip groove 630 so that the support column 530 drives the connecting column 710 to rotate.

[0052] The strip slot 630 of the support column through hole 620 and the protrusion 730 of the baffle 720 are clearance-matched, which can not only transmit the torque of the support column 530 (driving the connecting column 710 and the extrusion cylinder 220 to rotate synchronously), but also allow the extrusion cylinder 220 to move along the axial direction (meeting the axial displacement requirements during discharge).

[0053] The support column 530 serves as an axial support for the extrusion barrel 220. By cooperating with the rotating mechanism (e.g., the ring gear 610 and gear 560), it transmits torque to achieve stable rotation of the extrusion barrel 220. The support column flange 540 contacts the end surface of the extrusion barrel 220, maintaining uniform force during rotation and preventing jamming caused by excessive localized friction. This ensures precise positioning during both the sealing phase (extrusion barrel sealing the waste inlet 211) and the discharge phase (extrusion barrel opening 221 aligns with the waste outlet 250), improving the consistency of the solid-liquid separation process.

[0054] Furthermore, a reset spring 740 is sleeved on the connecting column 710 for resetting the extrusion cylinder 220. The inner wall of the support column through hole 620 near the end of the extrusion cylinder 220 shrinks inward to form a limiting flange 640. The limiting flange 640 and the baffle 720 are used to jointly limit the spring in the support column through hole 620.

[0055] The return spring 740 at the connecting column 710 compresses and stores energy when the extruder 220 is driven axially by the electric push rod (during the discharge phase). Once discharge is complete, the spring releases its force, pushing the extruder 220 back to its original position. This process requires no additional power and automatically resets the extruder, resolving the pain point of traditional trash cans requiring manual reset after operation, making it suitable for unattended public spaces.

[0056] The specific working principle of the trash can with solid-liquid separation function in this embodiment is as follows: Waste input stage: The user puts the garbage into the hopper 120 through the input port 110 , and the garbage slides through the hopper 120 to the garbage inlet 211 and enters the extrusion cylinder 220 through the extrusion cylinder opening 221 .

[0057] Sealing stage: The user presses the start button 140 on the control panel 130. The PLC controller receives the signal and starts the drive motor 550. The drive motor 550 rotates the support column 530 through the meshing of the gear 560 and the ring gear 610. The support column 530, through the engagement of the bar-shaped slot 630 and the protrusion 730, drives the extrusion barrel 220 to rotate synchronously until the sidewall of the extrusion barrel 220 covers the garbage inlet 211 (sealing position). The PLC controller then stops the drive motor 550, sealing the garbage inlet 211.

[0058] Extrusion separation stage: Once sealing is complete, the PLC controller controls the extension of the piston rod of the electric push rod 310, pushing the pressure plate 230 along the axis of the extrusion barrel 220 toward the leachate outlet 240, exerting a compressive force on the waste inside. A pressure sensor monitors the extrusion pressure in real time. When the pressure reaches a set threshold, the electric push rod 310 stops extending and maintains the pressure (the hold time is preset by the program). During the extrusion process, leachate from the waste is discharged through the leachate outlet 240 on the end face of the extrusion barrel 220, flows into the interior of the mounting barrel 210, and flows along the inclined inner wall of the mounting barrel 210 to the drain port 260. Then, through the drainage channel 5100 and the drainage hole 580, it enters the leachate collection tank 2100.

[0059] Nesting stage: After the pressure hold is complete, the PLC controller controls the piston rod of the electric push rod 310 to retract in the opposite direction, driving the extrusion barrel 220 along the axis of the mounting barrel 210, away from the leachate outlet 240 (at this point, the return spring 740 is compressed). When the extrusion barrel 220 reaches the "discharge position," the extrusion barrel opening 221 aligns with the waste outlet 250 of the mounting barrel 210, and the PLC controller controls the electric push rod 310 to stop retracting. Under the influence of gravity, the solid waste in the extrusion barrel 220 falls through the waste outlet 250 into the discharge channel 590, and then through the discharge hole 570 into the waste collection bin 290.

[0060] Reset phase: After discharge is complete, the PLC controller controls the piston rod of the electric push rod 310 to extend, driving the extrusion barrel 220 along the axis of the mounting barrel 210 toward the leachate discharge port 240. The return spring 740 releases its force to assist in the return. When the extrusion barrel 220 returns to its initial axial position, the electric push rod 310 stops extending. The PLC controller then controls the drive motor 550 to reverse, driving the support column 530 and the extrusion barrel 220 in the opposite direction until the extrusion barrel opening 221 is realigned with the waste inlet 211. The drive motor 550 then stops. Finally, the electric push rod 310 maintains its initial extension, the pressure plate 230 returns to its pre-extrusion position, and the system returns to standby mode, awaiting the next cycle.

[0061] In short, the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A trash can with solid-liquid separation function, characterized by: The trash can comprises a trash can body (100), wherein a mounting cylinder (210) is provided in the trash can body (100), a trash inlet (211) with an opening facing upward is provided in the middle of the mounting cylinder (210), an extrusion cylinder (220) is rotatably provided in the mounting cylinder (210), and a rotation mechanism for driving the extrusion cylinder (220) to rotate is provided at the mounting cylinder (210); an extrusion cylinder opening (221) is provided at the extrusion cylinder (220), a pressing plate (230) for extruding and crushing trash is provided in the extrusion cylinder (220), a driving mechanism for driving the pressing plate (230) to move is provided in the trash can body (100), a leachate discharge port (240) is provided at the end surface of the extrusion cylinder (220) along the extrusion direction of the pressing plate (230), and a support mechanism for supporting the extrusion cylinder (220) is provided at the mounting cylinder (210); The mounting cylinder (210) is further provided with a garbage discharge outlet (250) opening downward, and a liquid discharge outlet (260) is provided at the end of the mounting cylinder (210) away from the garbage discharge outlet (250); the garbage discharge outlet (250) and the garbage inlet (211) are staggered along the axial direction of the mounting cylinder (210); the extrusion cylinder (220) is movable along the axial direction of the mounting cylinder (210), and the driving mechanism is capable of driving the extrusion cylinder (220) to move so that the extrusion cylinder opening (221) moves to the garbage discharge outlet (250) to discharge the garbage in the extrusion cylinder (220).

2. The trash can with solid-liquid separation function according to claim 1, characterized in that: A mounting base (270) is provided in the trash can body (100), and a connecting foot (410) is provided on the bottom end surface of the mounting cylinder (210) and is bolted to the mounting base (270). The driving mechanism includes an electric push rod (310) provided at the mounting base (270), and the end of the piston rod of the electric push rod (310) passes through the side wall of the extrusion cylinder (220) and extends into the extrusion cylinder (220). The end of the piston rod of the electric push rod (310) that extends into the extrusion cylinder (220) is fixedly connected to the pressure plate (230).

3. The trash can with solid-liquid separation function according to claim 2, characterized in that: A cover plate (510) is provided at the end of the mounting cylinder (210) away from the driving mechanism, and a cover plate through hole (520) is provided at the cover plate (510). The support mechanism includes a support column (530) disposed in the cover plate through hole (520) and gap-matched with the cover plate through hole (520). The support column (530) is located in the mounting cylinder (210) and has a support column flange (540) at its end.

4. The trash can with solid-liquid separation function according to claim 3, characterized in that: The rotating mechanism includes a gear ring (610) arranged at the support column (530), a driving motor (550) is provided at the mounting base (270), and a gear (560) meshing with the gear ring (610) is provided at the rotating shaft of the driving motor (550); a support column through hole (620) is provided at the support column (530), and a strip-shaped slot (630) is provided at the side wall of the support column through hole (620). The extrusion cylinder (220) is close to the support column (53 0) is provided at the end surface thereof with a connecting column (710), and an end portion of the connecting column (710) away from the extrusion cylinder (220) is bolted to a baffle (720) that is clearance-matched with the support column through hole (620), and a convex block (730) that is clearance-matched with the strip-shaped slot (630) is provided at the side wall of the baffle (720), and an end portion of the convex block (730) extends into the strip-shaped slot (630) so that the support column (530) drives the connecting column (710) to rotate.

5. The trash can with solid-liquid separation function according to claim 4, characterized in that: A reset spring (740) for resetting the extrusion cylinder (220) is sleeved on the connecting column (710), and the inner wall of the support column through hole (620) near the end of the extrusion cylinder (220) shrinks inward to form a limiting flange (640). The limiting flange (640) and the baffle (720) are used to jointly limit the spring in the support column through hole (620).

6. The trash can with solid-liquid separation function according to claim 2, characterized in that: A discharge through hole (570) located below the garbage discharge outlet (250) and a liquid discharge through hole (580) located below the liquid discharge outlet (260) are provided at the mounting base (270); the outer wall of the mounting cylinder (210) extends from the end of the garbage discharge outlet (250) to the end of the discharge through hole (570) to form a discharge channel (590); and the outer wall of the mounting cylinder (210) extends from the end of the liquid discharge outlet (260) to the end of the liquid discharge through hole (580) to form a liquid discharge channel (5100).

7. The trash can with solid-liquid separation function according to claim 1, characterized in that: A sealing sleeve (750) for sealing the garbage inlet (211) is provided on the end surface of the extrusion cylinder (220) away from the driving mechanism.

8. The trash can with solid-liquid separation function according to claim 1, characterized in that: The mounting cylinder (210) is tilted on a vertical plane, and the angle between the axis of the mounting cylinder (210) and the horizontal plane is 4-8 degrees; the height of the end of the mounting cylinder (210) where the garbage discharge outlet (250) is located is greater than the height of the end of the mounting cylinder (210) where the liquid discharge outlet (260) is located.

9. The trash can with solid-liquid separation function according to claim 1, characterized in that: The trash can body (100) is provided with a processing chamber (280) below the mounting base (270), and the processing chamber (280) is provided with a trash collection barrel (290) below the discharge through-hole (570) and a leachate collection barrel (2100) below the liquid discharge through-hole (580).

10. The trash can with solid-liquid separation function according to claim 2, characterized in that: The trash can body (100) further comprises a delivery port (110) arranged above the mounting base (270), and a hopper (120) for conveying trash to the trash inlet (211) is provided at the delivery port (110).

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