A landfill leachate drainage device

Abstract

This invention relates to the field of landfill leachate collection technology and discloses a landfill leachate drainage device, including a drainage pipe and an arc-shaped plate, and further including: a storage section disposed in the upper part of the drainage pipe, the storage section having a variable-volume storage chamber and a receiving chamber, the storage chamber communicating with the top of the drainage pipe; and a guide component disposed on the arc-shaped plate, the guide component being located in the receiving chamber, the guide component including a support section and a contraction section. When the leachate in the drainage pipe is at a low level, the support section radially supports the storage section and monitors the weight of the leachate in the storage chamber. This invention can perform periodic pulse flushing of the drainage pipe at low flow rates, improving the anti-clogging effect of the drainage pipe, and contract the device at high flow rates to ensure the size of the drainage channel of the drainage pipe and reduce the impact on drainage during the rainy season.

Description

Technical Field

[0001] This invention relates to the field of landfill leachate collection technology, specifically a landfill leachate drainage device. Background Technology

[0002] During operation, landfills generate large amounts of high-concentration organic wastewater, or leachate, due to the decomposition of waste, rainwater leaching, and groundwater infiltration. Leachate has a complex composition, containing high concentrations of organic matter, ammonia nitrogen, heavy metals, and salts. If it is not collected and discharged in a timely and effective manner, it will seriously pollute the soil and groundwater environment, posing a significant threat to the surrounding ecosystem and human health.

[0003] Landfill leachate drainage systems mainly include horizontal drainage, vertical drainage, composite drainage, and reinjection drainage. Among them, the horizontal drainage system is often the mainstream system. Typically, a gravel / pebble drainage layer is laid on the impermeable layer (geotextile), combined with a perforated drainage pipe (HDPE perforated pipe) below, and a filter layer (geotextile) is laid on the top layer. The entire system is arranged at an incline (the incline angle is generally 2°-5°), so that the leachate can be drained under the action of gravity in the landfill site, and finally collected into the collection well through the main pipe.

[0004] Currently, drainage pipes are usually fixed structures. During use, in order to avoid siltation inside the pipes, it is generally necessary to regularly flush the drainage pipes with high-pressure water or artificially simulate large infiltration volumes. High-pressure water flushing can only effectively flush the local parts of the pipes and is difficult to penetrate the drainage pipe system. Artificially simulating large infiltration volumes is difficult to achieve the appropriate effect and can easily lead to instability of the waste pile. Summary of the Invention

[0005] This invention provides a landfill leachate drainage device that, through a guiding component and a drainage component, can intermittently collect and pulse-discharge leachate when the flow rate is low, instantly increasing the flow rate at the bottom of the pipe and preventing blockage. Simultaneously, during the rainy season or when there is a large infiltration volume, it can be fitted to the top of the pipe to stop additional water storage and avoid backflow. This solves the problems of severe blockage and poor flushing effect in the drainage pipes mentioned in the background art.

[0006] This invention provides the following technical solution: A landfill leachate drainage device includes a drainage pipe and an arc plate, and further includes: A liquid storage section is disposed in the upper part of the guide pipe. The liquid storage section has a liquid storage chamber and a receiving chamber with variable volume. The liquid storage chamber is connected to the top of the guide pipe. A guide assembly is disposed on the arc-shaped plate and located within the receiving cavity. The guide assembly includes a support portion and a retractable portion. When the leachate in the drainage pipe is at a low level, the support part supports the storage part radially and monitors the weight of the leachate in the storage chamber. When the leachate in the drainage pipe is at a high level, the contraction part drives the support part to move towards each other along the arc plate and reduces the space of the storage part vertically. A drainage component is installed on the liquid storage section. When the weight of the leachate in the liquid storage chamber reaches a threshold, the drainage component pulses the leachate in the liquid storage chamber to the bottom of the drainage pipe. A liquid level sensor is disposed at the bottom of the liquid storage section, and the liquid level sensor is electrically connected to the contraction section.

[0007] As a preferred embodiment of the present invention, the liquid storage section includes a slow-flow hole, which is formed through the guide pipe and the arc plate, and the slow-flow hole is connected to the liquid storage chamber.

[0008] As a preferred embodiment of the present invention, the liquid storage section further includes a separator and a mounting plate. The separator includes multiple vertical plate structures and horizontal arc-shaped plate structures. The vertical plate structures are intermittently installed at the bottom of the arc-shaped plate. The horizontal arc-shaped plate structures are connected to the bottom and arc-shaped ends of the vertical plate structures. The mounting plate is installed on the horizontal arc-shaped plate structures and is connected to the bottom end of the vertical plate structures. The horizontal arc-shaped plate structures are penetrated on both sides of the mounting plate.

[0009] As a preferred embodiment of the present invention, the support includes a guide rail with symmetrically arranged limiting holes. A rotating shaft is slidably connected in one of the limiting holes, a bushing is rotatably connected to the rotating shaft, and a connecting rod is installed on the bushing. The end of the connecting rod is rotatably connected to the mounting plate via a hinge.

[0010] As a preferred embodiment of the present invention, the shrinking part includes a drive motor, which is slidably connected in a limiting hole on one side. The shaft end of the drive motor is connected to a rotating shaft, and gears are installed on the shaft end and the rotating shaft on the other side of the drive motor. An arc-shaped rack is installed on the arc plate, and the arc-shaped rack meshes with the gear. A pull rope is installed between the guide rail and the connecting rod.

[0011] As a preferred embodiment of the present invention, it further includes a spring and a damping hydraulic component. The spring is symmetrically mounted on the guide rail, the damping hydraulic component is mounted at the center of the guide rail, and the telescopic ends of the guide rail extend from both sides.

[0012] As a preferred embodiment of the present invention, the drainage assembly includes a sealing plate, and the mounting plate has multiple sealing cavities and drainage holes. The sealing plate is slidably connected to the sealing cavities, and the end of the sealing plate extends into the drainage holes. A piston plate is mounted on the upper part of the sealing plate near one end of the sealing cavity, and the piston plate is slidably connected to the top of the sealing cavity. A flow-diverting cavity is formed inside the mounting plate, and the flow-diverting cavity communicates with the space formed between the piston plate and the sealing plate. The flow-diverting cavity is connected to the damping hydraulic component through a pipe.

[0013] As a preferred embodiment of the present invention, it further includes a plurality of balls, which are evenly disposed at the bottom of the sealing cavity and are in contact with the bottom of the sealing plate.

[0014] As a preferred embodiment of the present invention, an elastic protrusion is installed at the bottom of the sealing cavity, a first buffer is installed on the sealing plate, and a second buffer is installed on the side of the sealing cavity near the sealing plate. The first and second buffers are centrally symmetrically distributed. When the sealing plate coincides with the drain hole, the sidewall of the elastic protrusion abuts against the end of the sealing plate. When the sealing plate moves to the end of the sealing cavity, the first and second buffers are elastically engaged.

[0015] As a preferred embodiment of the present invention, it further includes a compression rod and an arc-shaped groove. The compression rod is symmetrically installed on the fixing part. The arc-shaped groove is opened on the side of the arc plate near the slow-flow hole and is connected to the slow-flow hole. A baffle is slidably connected inside the arc-shaped groove. A connecting cavity is opened inside the arc plate. One end of the connecting cavity is connected to the arc-shaped groove, and the other end of the connecting cavity is connected to the compression rod through a pipe.

[0016] Compared with the prior art, the present invention provides a landfill leachate drainage device, which has the following beneficial effects: 1. In this landfill leachate drainage device, a portion of the leachate can be collected at low flow rates through the storage section. After a certain amount of leachate is collected, the drainage component is driven by the guiding component to quickly discharge the stored leachate, thereby increasing the instantaneous flow rate in the pipeline and flushing the sludge at the bottom of the pipeline. Compared with existing flushing methods, the pipeline has a better anti-clogging effect and is more energy-efficient and environmentally friendly.

[0017] 2. In this landfill leachate drainage device, the liquid level in the drainage pipe is monitored by a liquid level sensor. When the liquid level is high, the contraction section is controlled to contract the storage section to stop additional water storage, thereby preventing water backlog in the drainage pipe and reducing the impact on drainage during the rainy season.

[0018] The parts of this device not described herein are the same as or can be implemented using existing technologies. This invention can perform periodic pulse flushing of the drainage pipe at low flow rates to improve the anti-clogging effect of the drainage pipe, and shrink the device at high flow rates to ensure the size of the drainage channel of the drainage pipe and reduce the impact on drainage during the rainy season. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the guide pipe in this invention; Figure 3 This is a three-dimensional schematic diagram of the liquid storage section in this invention; Figure 4 This is a three-dimensional schematic diagram of the internal structure of the liquid storage section in this invention; Figure 5 This is a partial perspective view of the present invention; Figure 6 This is a three-dimensional schematic diagram of the guide component in this invention; Figure 7 This is a partial cross-sectional structural diagram of the mounting plate in this invention; Figure 8 For the present invention Figure 2 A schematic diagram of the structure of part A.

[0021] In the diagram: 1. Guide pipe; 2. Arc plate; 3. Connector; 4. Divider; 5. Flow-slowing hole; 6. Mounting plate; 7. Guide assembly; 71. Guide rail; 72. Limiting hole; 73. Drive motor; 74. Gear; 75. Bushing; 76. Connecting rod; 77. Spring; 78. Pull rope; 8. Curved rack; 9. Damping hydraulic components; 10. Drainage assembly; 101. Sealing cavity; 102. Drainage hole; 103. Sealing plate; 104. Piston plate; 105. Ball bearing; 106. Diverting cavity; 107. Elastic protrusion; 108. First buffer; 109. Second buffer; 11. Compression rod; 12. Arc groove; 13. Baffle; 14. Connecting cavity; 15. Liquid level sensor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figures 1-8 A landfill leachate drainage device includes a drainage pipe 1 and an arc plate 2, a liquid level sensor 15, which is installed at the bottom of the liquid storage section and electrically connected to the contraction section. The drainage pipe 1 is made of HDPE perforated pipe and is distributed in a tree-like manner in the drainage layer at the bottom of the landfill. The diameter of the drainage pipe 1 is 16cm or 20cm. The lower part of the drainage pipe 1 is uniformly perforated with a radial angle of 180°-240° along the drainage pipe 1 to ensure the smoothness of the drainage. The arc plate 2 is fixed to the drainage pipe 1 by a connector 3. The liquid level sensor 15 is electrically connected to the drive motor 73.

[0024] HDPE perforated pipes are made of high-density polyethylene, possessing excellent corrosion resistance, aging resistance, and mechanical strength. They can operate stably for extended periods in the harsh chemical environment of landfills. The drainage pipes 1 are distributed in a stump-like pattern at the bottom of the landfill, forming a dense leachate collection network. This ensures effective collection of leachate from all areas at the bottom of the landfill. The diameter of the drainage pipes 1 balances drainage capacity with installation space, guaranteeing sufficient cross-sectional area to handle large flow rates of leachate while facilitating installation within the limited space at the bottom of the landfill. The non-full-circumference perforation has a clear functional consideration: concentrating the perforations on the lower half of the drainage pipe 1 ensures that leachate can smoothly enter the drainage pipe 1 from the bottom and lower side, while preventing debris from falling directly into the pipe and causing blockage. At the same time, this angle setting can also form a stable liquid flow pattern in the drainage pipe 1, avoiding liquid flow turbulence caused by uneven air intake, thereby ensuring the smooth drainage of the drainage pipe 1. The liquid storage units can be arranged in an array according to the length of the drainage pipe 1, so that a single liquid storage unit can perform pulse flushing on a certain amount of sludge at the bottom of the drainage pipe 1.

[0025] The connector 3 securely suspends the arc plate 2 above the inside of the drain pipe 1, forming a reliable installation base. At the same time, the connector 3 allows necessary adjustments to accommodate installation errors and thermal expansion and contraction. The liquid level sensor 15 monitors the liquid level of the leachate in the drain pipe 1 in real time, providing key status parameters for the automated control of the entire device. This enables changes in liquid level to trigger subsequent actions in a timely manner, achieving closed-loop control from sensing to execution.

[0026] Reference Figures 2-3The liquid storage section is located in the upper part of the guide pipe 1. The liquid storage section has a liquid storage chamber and a receiving chamber with variable volume. The liquid storage chamber is connected to the top of the guide pipe 1. The liquid storage section includes a slow flow hole 5, which is opened through the guide pipe 1 and the arc plate 2. The slow flow hole 5 is connected to the liquid storage chamber.

[0027] The liquid storage function is concentrated in the upper area of ​​the drainage pipe 1, making full use of the upper space inside the drainage pipe 1 to avoid interference with the main liquid flow channel below. The top position is far away from the main liquid flow surface, reducing the direct impact of liquid flow impact on the liquid storage structure. The slow flow hole 5 establishes a liquid flow channel between the drainage layer and the liquid storage cavity (the slow flow hole 5 is located above the perforation and below the geotextile), so that the leachate can enter the liquid storage cavity at a relatively gentle speed, avoiding liquid flow impact and splashing caused by excessive flow velocity.

[0028] Reference Figure 4 The liquid storage section also includes a separator 4 and a mounting plate 6. The separator 4 includes multiple vertical plate structures and horizontal arc-shaped plate structures. The vertical plate structures are intermittently installed at the bottom of the arc-shaped plate 2. The horizontal arc-shaped plate structures are connected to the bottom and arc-shaped ends of the vertical plate structures. The mounting plate 6 is installed on the horizontal arc-shaped plate structures and is connected to the bottom end of the vertical plate structures. The horizontal arc-shaped plate structures are penetrated on both sides of the mounting plate 6.

[0029] The separator 4 is made of flexible and corrosion-resistant material and has deformable characteristics. Multiple vertical plate structures and horizontal arc-shaped structures form multiple cavities (namely, liquid storage cavities and receiving cavities), which separate the equipment structure from the leachate, prevent the leachate from corroding the structure, and ensure the stability of the structure's operation. When the liquid storage volume increases, the separator 4 can expand downward to increase the liquid storage cavity space; when it is necessary to compress the liquid storage section, the separator 4 can shrink upward to reduce the occupied volume. The mounting plate 6 serves as the lower support and connection interface for the separator 4, providing a liquid flow path for the subsequent operation of the drainage assembly 10, so that the leachate in the liquid storage cavity can eventually flow into the main liquid flow of the drainage pipe 1. It should be noted that the cross-sectional area of ​​the separator 4 in its natural state is 1 / 5 to 1 / 3 of the cross-sectional area of ​​the drainage pipe 1, so that the liquid storage cavity can store enough leachate for pulse flushing of the drainage pipe 1, while avoiding short-term backlog of the drainage pipe 1 due to excessive area.

[0030] Reference Figures 5-6 The guide component 7 is disposed on the arc plate 2 and is located in the receiving cavity. The guide component 7 includes a support part and a contraction part. When the leachate in the guide pipe 1 is at a low level, the support part supports the storage part radially and monitors the weight of the leachate in the storage cavity. When the leachate in the guide pipe 1 is at a high level, the contraction part drives the support part to move towards each other along the arc plate 2 and reduces the space of the storage part vertically. The support includes a guide rail 71 with symmetrically arranged limit holes 72. A rotating shaft is slidably connected in one of the limit holes 72. A bushing 75 is rotatably connected to the rotating shaft. A connecting rod 76 is installed on the bushing 75. The end of the connecting rod 76 is rotatably connected to the mounting plate 6 via a hinge.

[0031] When the leachate in the drainage pipe 1 is at a low level, the support unit performs its structural support function, supporting the storage unit radially. This resists the severe outward expansion of the separator 4 due to the weight of the internal liquid, maintaining the stability of the storage unit's position. At the same time, the support unit can monitor the weight of the leachate in the storage chamber, indirectly sensing it through the mechanical response of each component: as the weight of the liquid in the storage chamber increases, the load borne by the support unit increases accordingly. This is detected and identified through deformation, pressure transmission, and other means, providing a basis for subsequent adjustment decisions.

[0032] The limiting hole 72 is an arc-shaped hole structure, which provides guidance and constraint for the movement of the rotating shaft and the drive motor 73. The bushing 75 can rotate freely around the rotating shaft to facilitate the angle adjustment of the connecting rod 76. The connecting rod 76 is a force transmission component and adopts an elastic telescopic structure. One end is connected to the mounting plate 6 through a hinge. The hinge connection allows the angle between the connecting rod 76 and the mounting plate 6 to change flexibly. When the weight of the leachate in the storage chamber increases, gravity will be transmitted to the rotating shaft through the connecting rod 76, causing the rotating shaft to move along the limiting hole 72, while also resisting the weight of the leachate.

[0033] The retractable section includes a drive motor 73, which is slidably connected to a limiting hole 72 on one side. The shaft end of the drive motor 73 is connected to a rotating shaft, and gears 74 are installed on the shaft end and the rotating shaft on the other side of the drive motor 73. An arc-shaped rack 8 is installed on the arc plate 2, and the arc-shaped rack 8 meshes with the gear 74. A pull rope 78 is installed between the guide rail 71 and the connecting rod 76. The section also includes a spring 77 and a damping hydraulic component 9. The spring 77 is symmetrically installed on the guide rail 71, and the damping hydraulic component 9 is installed at the center of the guide rail 71. The telescopic ends of the guide rail 71 extend from both sides.

[0034] When the leachate in the guide pipe 1 is at a high level, the contraction section drives the support section to move towards each other along the direction of the arc plate 2. At the same time, the movement of the support section can also reduce the space of the storage section in the vertical direction, that is, the bottom of the storage section rises. When the main liquid level in the guide pipe 1 is high and it is necessary to increase the flow capacity of the main channel, the effective flow space in the guide pipe 1 can be released by compressing the storage section, so as to avoid the main channel becoming narrow due to the storage section occupying too much volume.

[0035] When the drive motor 73 rotates, it drives the shaft to rotate synchronously. A stable transmission point is formed through the double gear 74. When the drive motor 73 is running, the gear 74 rolls towards each other along the arc-shaped rack 8. The pull rope 78 establishes a mechanical connection between the guide rail 71 and the connecting rod 76. When the drive motor 73 and the shaft move, the swing angle of the connecting rod 76 can be actively controlled by the traction of the pull rope 78, so that the connecting rod 76 gradually swings in the horizontal direction, thereby moving the mounting plate 6 towards the side of the arc-shaped plate 2 and reducing the cross-sectional area of ​​the liquid storage part. It should be explained that the power of the drive motor 73 can be provided by the flow of leachate in conjunction with the hydroelectric power generation equipment, or a start-up motor can be used. That is, when the liquid level is low, as the weight of the leachate in the liquid storage chamber increases, the gear 74 will frequently drive the drive motor 73 to rotate, thereby generating electricity to facilitate the subsequent self-starting of the drive motor 73.

[0036] Spring 77 is arc-shaped. When the weight of the leachate in the storage chamber increases, spring 77 is stretched to store energy to resist the influence of the leachate weight on the separator 4. Damping hydraulic component 9 provides smooth motion damping. As the weight of the storage part increases, the bushings 75 will move closer to each other. When the weight reaches the threshold, the bushings 75 will come into contact with and compress the damping hydraulic component 9. At the same time, the damping hydraulic component 9 has a damping effect. When the bushings 75 are separated from the damping hydraulic component 9, the damping hydraulic component 9 will slowly self-recover, realizing adaptive and smooth control.

[0037] Reference Figure 4 and Figure 7 The drainage assembly 10 is installed on the liquid storage section. When the weight of the leachate in the liquid storage chamber reaches a threshold, the drainage assembly 10 pulses the leachate in the liquid storage chamber to the bottom of the drainage pipe 1. The drainage assembly 10 includes a sealing plate 103. The mounting plate 6 has multiple sealing cavities 101 and drainage holes 102. The sealing plate 103 is slidably connected to the sealing cavities 101, and the end of the sealing plate 103 extends into the drainage hole 102. A piston plate 104 is installed above the end of the sealing plate 103 near the sealing cavity 101. The piston plate 104 is slidably connected to the top of the sealing cavity 101. The mounting plate 6 has a diversion cavity 106 inside. The diversion cavity 106 communicates with the space formed between the piston plate 104 and the sealing plate 103. The diversion cavity 106 is connected to the damping hydraulic component 9 through a pipe.

[0038] The sealing plate 103 can reciprocate within the sealing cavity 101, so that the position of the sealing plate 103 directly determines the on / off state of the drain hole 102: when the sealing plate 103 covers the drain hole 102, the drain hole 102 is closed; when the sealing plate 103 moves away from the drain hole 102, the drain hole 102 is opened, and the leachate can flow into the bottom of the guide pipe 1 through the drain hole 102. The piston plate 104 divides the space of the sealing cavity 101 into two chambers. When pressure is applied above the piston plate 104, the piston plate 104 moves into the sealing cavity 101, driving the sealing plate 103 to move synchronously and opening the drain hole 102; when the pressure is released, the piston plate 104 returns to its original position, driving the sealing plate 103 to close the drain hole 102; the diversion chamber 106 and the piston plate The space formed between 104 and sealing plate 103 remains connected, allowing the pressure of damping hydraulic component 9 to be transmitted to the piston plate 104, driving the sealing plate 103 to move and realizing hydraulic linkage between guide component 7 and drainage component 10. When the damping hydraulic component 9 experiences pressure changes due to the extension of the storage chamber, this pressure can be directly used to control the opening and closing of drainage component 10 without the need for an additional power source, improving the system's integration and energy efficiency. Drainage hole 102 is aligned with the bottom of drainage pipe 1. The size and number of drainage holes 102 need to be set with reference to the diameter of drainage pipe 1 so that when leachate is discharged, the instantaneous flow velocity in drainage pipe 1 can reach 1.5m / s-2.0m / s, and the impact force is 1.5-3 times that of natural flow during the rainy season, resulting in a stronger flushing effect.

[0039] It also includes multiple balls 105, which are evenly distributed at the bottom of the sealing cavity 101 and are in contact with the bottom of the sealing plate 103.

[0040] The ball bearing 105 is used to convert the sliding friction between the sealing plate 103 and the bottom of the sealing cavity 101 into rolling friction, reducing the frictional resistance when the sealing plate 103 moves, making the drainage assembly 10 more responsive, while reducing wear and extending its service life.

[0041] An elastic protrusion 107 is installed at the bottom of the sealing cavity 101, a first buffer 108 is installed on the sealing plate 103, and a second buffer 109 is installed on the side of the sealing cavity 101 near the sealing plate 103. The first buffer 108 and the second buffer 109 are centrally symmetrically distributed. When the sealing plate 103 coincides with the drain hole 102, the side wall of the elastic protrusion 107 abuts against the end of the sealing plate 103. When the sealing plate 103 moves to the end of the sealing cavity 101, the first buffer 108 and the second buffer 109 are elastically engaged.

[0042] The elastic protrusion 107, the first buffer 108, and the second buffer 109 are made of deformable materials such as rubber or elastic plastic. When the sealing plate 103 coincides with the drain hole 102, that is, when the sealing plate 103 is in the position where the drain hole 102 is closed, the sidewall of the elastic protrusion 107 forms an abutment relationship with the end of the sealing plate 103. On the one hand, this can prevent the sealing plate 103 from moving unexpectedly due to vibration or fluid flow impact, ensuring the reliability of the closed state. On the other hand, it can store fluid during the process of the damping hydraulic component 9 being compressed to the threshold. The energy is stored so that when the threshold is reached, the sealing plate 103 can quickly move to the end of the sealing cavity 101, that is, instantly open the entire drain hole 102 to ensure the effect of pulse flushing. At the same time, the first buffer 108 and the second buffer 109 can form an elastic engagement. When the drain hole 102 is closed, the first buffer 108 and the second buffer 109 are elastically engaged, which can achieve delayed closure of the drain hole 102 to ensure that the leachate in the storage cavity can be discharged quickly and as much as possible, thus ensuring the effect of pulse flushing.

[0043] Reference Figure 2 and Figure 8 It also includes a compression rod 11 and an arc-shaped groove 12. The compression rod 11 is symmetrically installed on the fixed part. The arc-shaped groove 12 is opened on the side of the arc plate 2 near the slow flow hole 5 and is connected to the slow flow hole 5. A baffle 13 is slidably connected inside the arc-shaped groove 12. A connecting cavity 14 is opened inside the arc plate 2. One end of the connecting cavity 14 is connected to the arc-shaped groove 12, and the other end of the connecting cavity 14 is connected to the compression rod 11 through a pipe.

[0044] The compression rod 11 adopts a telescopic elastic rod structure with an internal piston chamber. The baffle 13 can move within the arc-shaped groove 12. When the flow rate of the guide pipe 1 is low, the compression rod 11 is in an extended state, and some of the leachate around the guide pipe 1 can enter the storage chamber through the slow-flow hole 5. When the flow rate of the guide pipe 1 is high, the compression rod 11 is in a compressed state, driving the baffle 13 to block the slow-flow hole 5. This prevents leachate from entering the storage chamber, increasing the area of ​​the storage chamber and thus improving the effective drainage area of ​​the guide pipe 1. It also prevents leachate from entering the storage chamber at high flow rates (when leachate is present). When the liquid flow rate is too fast, it can easily carry particulate matter and other impurities from the waste, causing severe blockage of the slow-flow orifice 5. In addition, it should be explained that when the leachate flow rate is low, even if particulate matter and other impurities are present at the slow-flow orifice 5, severe blockage will not occur. Furthermore, when the leachate is discharged from the storage chamber, the separator 4 will self-reset under the action of itself, the connecting rod 76, and the spring 77 (the volume of the storage chamber will shrink). At this time, the gas in the upper space of the storage chamber will have a backflushing effect on the slow-flow orifice 5, thereby avoiding blockage of the slow-flow orifice 5 and improving the coordination and stability of the system.

[0045] Components not described in detail in this article are existing technologies.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A landfill leachate drainage device, comprising a drainage pipe (1) and an arc-shaped plate (2), characterized in that, Also includes: The liquid storage section is located in the upper part of the guide pipe (1). The liquid storage section has a liquid storage chamber and a receiving chamber with variable volume. The liquid storage chamber is connected to the top of the guide pipe (1). A guide assembly (7) is disposed on the arc-shaped plate (2) and is located within the receiving cavity. The guide assembly (7) includes a support portion and a retractable portion. When the leachate in the drain pipe (1) is at a low level, the support part supports the storage part radially and monitors the weight of the leachate in the storage chamber. When the leachate in the drain pipe (1) is at a high level, the contraction part drives the support part to move towards each other along the arc plate (2) and shrinks the space of the storage part vertically. The drain assembly (10) is installed on the liquid storage section. When the weight of the leachate in the liquid storage chamber reaches the threshold, the drain assembly (10) pulses the leachate in the liquid storage chamber to the bottom of the drain pipe (1). A liquid level sensor (15) is disposed at the bottom of the liquid storage section, and the liquid level sensor (15) is electrically connected to the contraction section.

2. The landfill leachate drainage device according to claim 1, characterized in that, The liquid storage section includes a slow-flow hole (5), which is opened through the guide pipe (1) and the arc plate (2), and the slow-flow hole (5) is connected to the liquid storage chamber.

3. A landfill leachate drainage device according to claim 2, characterized in that, The liquid storage section also includes a separator (4) and a mounting plate (6). The separator (4) includes multiple vertical plate structures and horizontal arc-shaped plate structures. The vertical plate structures are intermittently installed at the bottom of the arc-shaped plate (2). The horizontal arc-shaped plate structures are connected to the bottom and arc-shaped ends of the vertical plate structures. The mounting plate (6) is installed on the horizontal arc-shaped plate structures and is connected to the bottom end of the vertical plate structures. The horizontal arc-shaped plate structures are penetrated on both sides of the mounting plate (6).

4. A landfill leachate drainage device according to claim 3, characterized in that, The support includes a guide rail (71), on which limit holes (72) are symmetrically opened. A rotating shaft is slidably connected in one of the limit holes (72), and a bushing (75) is rotatably connected on the rotating shaft. A connecting rod (76) is installed on the bushing (75), and the end of the connecting rod (76) is rotatably connected to the mounting plate (6) through a hinge.

5. A landfill leachate drainage device according to claim 4, characterized in that, The retractable part includes a drive motor (73), which is slidably connected in a limiting hole (72) on one side. The shaft end of the drive motor (73) is connected to a rotating shaft, and gears (74) are installed on the shaft end and the rotating shaft on the other side of the drive motor (73). An arc rack (8) is installed on the arc plate (2), and the arc rack (8) meshes with the gear (74). A pull rope (78) is installed between the guide rail (71) and the connecting rod (76).

6. A landfill leachate drainage device according to claim 4, characterized in that, It also includes a spring (77) and a damping hydraulic component (9), the spring (77) being symmetrically mounted on the guide rail (71), the damping hydraulic component (9) being mounted at the center of the guide rail (71), and the telescopic ends of the guide rail (71) extending from both sides.

7. A landfill leachate drainage device according to claim 6, characterized in that, The drainage assembly (10) includes a sealing plate (103). The mounting plate (6) has multiple sealing cavities (101) and drainage holes (102). The sealing plate (103) is slidably connected to the sealing cavities (101), and the end of the sealing plate (103) extends into the drainage hole (102). A piston plate (104) is installed above the end of the sealing plate (103) near the sealing cavity (101). The piston plate (104) is slidably connected to the top of the sealing cavity (101). A diversion cavity (106) is provided inside the mounting plate (6). The diversion cavity (106) is connected to the space formed between the piston plate (104) and the sealing plate (103). The diversion cavity (106) is connected to the damping hydraulic component (9) through a pipe.

8. A landfill leachate drainage device according to claim 7, characterized in that, It also includes a plurality of balls (105), which are evenly disposed at the bottom of the sealing cavity (101) and the balls (105) are in contact with the bottom of the sealing plate (103).

9. A landfill leachate drainage device according to claim 7, characterized in that, An elastic protrusion (107) is installed at the bottom of the sealing cavity (101), a first buffer (108) is installed on the sealing plate (103), and a second buffer (109) is installed on the side of the sealing cavity (101) near the sealing plate (103). The first buffer (108) and the second buffer (109) are centrally symmetrically distributed. When the sealing plate (103) coincides with the drain hole (102), the side wall of the elastic protrusion (107) abuts against the end of the sealing plate (103). When the sealing plate (103) moves to the end of the sealing cavity (101), the first buffer (108) and the second buffer (109) are elastically engaged.

10. A landfill leachate drainage device according to claim 2, characterized in that, It also includes a compression rod (11) and an arc groove (12). The compression rod (11) is symmetrically installed on the fixed part. The arc groove (12) is opened on the side of the arc plate (2) near the slow flow hole (5) and the arc groove (12) is connected to the slow flow hole (5). A baffle (13) is slidably connected inside the arc groove (12). A connecting cavity (14) is opened inside the arc plate (2). One end of the connecting cavity (14) is connected to the arc groove (12), and the other end of the connecting cavity (14) is connected to the compression rod (11) through a pipe.

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