Landfill leachate drainage system and landfill structure

Abstract

The utility model discloses a garbage pool leachate pollution discharge system and garbage pool structure relates to garbage pool technical field, wherein, the grating plate can be located at the pollution discharge hole department of garbage pool, and the both sides of grating plate along its thickness direction are inside and outside respectively, and grating plate is equipped with a plurality of through the installation hole of inside and outside, a plurality of cleaning devices are correspondingly set up with a plurality of installation holes respectively, and the cleaning device includes sleeve, screw rod and the folding frame of parallelogram, the sleeve extends along the thickness direction of grating plate, and is worn in the installation hole department, the screw rod is worn and is connected in the sleeve with screw thread, and the folding frame is located at the inside of grating plate, and one end of folding frame is located on the sleeve, and the opposite end is located on the screw rod, and the screw rod can rotate and retract relative to the sleeve to drive the folding frame to fold or unfold, and the one end of screw rod away from folding frame is equipped with drive connecting portion, and drive connecting portion is located at the outside of grating plate. The utility model can effectively solve the situation of silting up, guarantee the smooth pollution discharge, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of landfill technology, and in particular to a landfill leachate discharge system and landfill structure. Background Technology

[0002] Waste incineration is currently the mainstream technology for treating municipal solid waste. Because municipal solid waste is diverse and contains a certain amount of moisture, various wastewaters within the waste form leachate. To ensure the incineration performance of the waste and control the leachate level in the waste pit, it is necessary to separate the leachate from the pit. Currently, the main treatment method for conventional waste pits is to leave drainage holes and implement certain filtration measures.

[0003] Existing leachate drainage systems for landfills mainly employ the following methods: Centralized drainage holes are designed into the reinforced concrete walls of the landfill, with various types of perforated steel grates installed at these holes to allow leachate to drain through. However, as sludge from the leachate gradually accumulates at these perforations, the grates eventually become clogged, leading to poor drainage.

[0004] Extensive use of stainless steel sleeves to create large drainage grates across the reinforced concrete walls of the garbage pit has been implemented. However, this method does not fundamentally prevent clogging, and the large area makes unclogging difficult. Furthermore, creating too many holes in the concrete walls increases the risk of damage.

[0005] A hydraulically driven unblocking device is installed on the inner side of the drain hole near the leachate channel. This device consists of a metal rod corresponding to a hole in the grating plate at the drain hole. Driven hydraulically, when the drain hole becomes clogged, the metal rod extends through the hole into the garbage pit, moving the garbage and clearing the blockage. However, hydraulic sewage discharge equipment costs hundreds of thousands of yuan, and operating and maintenance costs must also be considered. Furthermore, repairs are relatively difficult if a malfunction occurs.

[0006] Therefore, it is evident that the existing landfill leachate discharge system needs further structural optimization. Utility Model Content

[0007] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a leachate discharge system for landfills and a landfill structure that is uniquely simple, low in cost, and effectively solves the problem of clogging, ensuring smooth discharge.

[0008] The first aspect of this utility model provides a landfill leachate discharge system, which includes:

[0009] A grating plate is configured to be installed at the drain hole of a garbage pit, wherein the two sides of the grating plate along its thickness direction are the inner side and the outer side, and the grating plate is provided with a plurality of mounting holes penetrating the inner side and the outer side.

[0010] A cleaning device is provided in multiple parts, each corresponding to one of the mounting holes. The cleaning device includes a sleeve, a screw, and a parallelogram-shaped folding frame. The sleeve extends along the thickness direction of the grating plate and passes through the mounting hole. The screw passes through the sleeve and is threaded to the sleeve. The folding frame is located inside the grating plate, with one end of the folding frame on the sleeve and the other end on the screw. The screw is configured to rotate and extend relative to the sleeve to drive the folding frame to fold or unfold. The end of the screw away from the folding frame has a drive connection part located outside the grating plate.

[0011] The leachate discharge system for landfills according to the first aspect of this utility model has at least the following beneficial effects: When the drain hole of the landfill becomes clogged, workers can apply force to the drive connection on the screw through manual or electric drive, causing the screw to rotate relative to the sleeve. This allows the screw to move along the extension direction of the sleeve towards the inside of the grid plate, causing the folding frame to switch from a folded state to an unfolded state under the drive of the screw. The unfolding action of the folding frame can then push the garbage located inside the grid plate, allowing the leachate to form a flow channel again. The flowing leachate can disperse the clogged sludge, thus achieving smooth discharge of leachate and removal of sludge. Furthermore, the cleaning device has a unique and simple structure, low cost, and low operating cost.

[0012] In some embodiments of this utility model, the grating plate is provided with multiple stiffening crossbeams arranged at intervals along the vertical direction, and the stiffening crossbeams are fixedly connected to the grating plate.

[0013] In some embodiments of this utility model, the stiffening crossbeam is located inside the grating plate, the stiffening crossbeam is provided with a through hole, the mounting hole and the through hole both extend along the thickness direction of the grating plate and are connected, the sleeve passes through the mounting hole and the through hole along the thickness direction of the grating plate, the folding frame has a folded state and an unfolded state, the folding frame is configured to contact the stiffening crossbeam in the folded state, and the folding frame extends along the extension direction of the stiffening crossbeam.

[0014] In some embodiments of this utility model, the leachate discharge system for landfills further includes reinforcing beams. The reinforcing beams are located at the discharge holes and on the outside of the grating. Multiple reinforcing beams are provided and are respectively arranged in a corresponding manner to the multiple stiffening beams along the thickness direction of the grating. The two ends of the sleeve are fixedly connected to the stiffening beams and the reinforcing beams, respectively.

[0015] In some embodiments of this utility model, the reinforcing beam and the stiffening beam are channel steel components.

[0016] In some embodiments of this invention, the folding frame is configured to be stored in the groove of the stiffening beam in a folded state.

[0017] In some embodiments of this utility model, the cleaning device further includes a crank handle, the crank handle having at least one crank handle, the crank handle having a mating portion that can engage with the drive connection portion; or, the cleaning device further includes a rotary driver, the rotary driver being electric, the rotary driver having a rotating shaft that can engage with the drive connection portion.

[0018] In some embodiments of this utility model, the folding frame includes a double connecting rod, a first support and a second support. The first support is fixedly connected to the sleeve, and the second support is rotatably connected to the screw. There are two double connecting rods, which are symmetrically arranged about the screw. One end of the double connecting rod is hinged to the first support and the other end is hinged to the second support.

[0019] A second aspect of this utility model provides a garbage pit structure, which includes:

[0020] Landfill leachate discharge system as described in any of the embodiments of the first aspect;

[0021] The pool body is provided with several drainage holes, and the leachate drainage system of the garbage pool is located at the drainage holes.

[0022] The garbage pit structure according to the second aspect of the present invention has at least the following beneficial effects: the garbage pit structure adopts the above-mentioned garbage pit leachate discharge system, which can effectively clean up sludge, solve the blockage, and thus ensure that the leachate can be discharged smoothly. Moreover, it is low in cost and suitable for widespread application.

[0023] In some embodiments of this utility model, a reinforced concrete concealed beam is provided at the upper end of the sewage outlet, and reinforced concrete concealed columns are provided on both sides of the sewage outlet. The grating plate is connected to the reinforced concrete concealed beam and the reinforced concrete concealed columns respectively.

[0024] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0025] Figure 1 This is a partial structural diagram of a garbage pit structure provided according to an embodiment of the present utility model;

[0026] Figure 2 yes Figure 1 A schematic diagram of the landfill leachate discharge system in its non-operating state, shown in section AA.

[0027] Figure 3 yes Figure 1 A schematic diagram of the leachate discharge system of the landfill shown at section AA in operation;

[0028] Figure 4 yes Figure 1 A structural schematic diagram of the waste pit structure shown in section BB;

[0029] Figure 5 This is a structural schematic diagram of the grating plate provided according to an embodiment of the present utility model.

[0030] Reference numerals: 110, reinforced concrete concealed beam; 120, reinforced concrete concealed column; 130, concrete frame flat beam; 140, concrete frame column; 150, drain hole; 160, drainage ditch; 200, grating; 210, reserved hole; 220, stiffening crossbeam; 230, connecting hole; 240, through hole; 300, embedded part; 400, cleaning device; 410, double connecting rod; 421, first support; 422, second support; 430, screw; 431, drive connection part; 440, sleeve; 500, crank handle; 600, reinforcing crossbeam. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Waste incineration is currently the mainstream technology for treating municipal solid waste. Due to the diverse types of municipal solid waste and its content of moisture, various wastewaters within the waste form leachate. To ensure the incineration performance of the waste and control the leachate level in the waste pit, it is necessary to separate the leachate from the pit. Currently, the main treatment method for conventional waste pits is to leave drainage holes and implement certain filtration measures. Existing leachate drainage systems for waste pits mainly employ the following approaches:

[0035] Option 1: Design centralized drainage holes on the reinforced concrete walls of the waste collection pit, with 1 to 2 drainage holes spaced 6 to 9 meters apart. Different types of perforated steel grates are installed at these drainage holes to allow leachate to drain through the perforations. This leachate drainage system works well in the initial stages of project operation. However, as sludge from the leachate gradually accumulates at the perforations, the steel grates become clogged, leading to poor drainage.

[0036] Option Two: In addition to setting a certain number of drainage holes as in Option One, multiple stainless steel sleeves are installed over a large area on the reinforced concrete garbage pit wall. The horizontal and vertical spacing between any adjacent sleeves is 0.5 meters, and the diameter of the sleeves is 0.1 to 0.15 meters, forming a large-area drainage grate on the entire concrete wall. This option increases the area of ​​the drainage holes, improving leachate discharge to some extent. However, it does not fundamentally eliminate the drawback of hole clogging, and the large area makes dredging more difficult. Moreover, creating too many holes in the concrete wall increases the risk of damage to the concrete wall.

[0037] Option 3: In addition to setting a certain number of drainage holes as in Option 1, a hydraulically driven unblocking device is installed on the inner side of the drainage holes near the leachate channel. The unblocking device is a metal rod corresponding to the holes in the grating plate at the drainage hole. Driven hydraulically, when the drainage hole becomes clogged, the metal rod is propelled through the holes in the grating plate into the garbage pit, moving the garbage in the pit and clearing the clogged drainage hole. This option adds specialized hydraulic drainage equipment, significantly improving the unblocking of leachate drainage holes and resolving clogs. However, the cost is high, with each device costing hundreds of thousands of yuan, and operating and maintenance costs must also be considered. Furthermore, repairs in case of malfunction are relatively difficult.

[0038] Based on the above-mentioned technical problems, this utility model provides a leachate discharge system and a waste pit structure, which is low in cost and can effectively solve the clogging problem in the discharge process, ensuring smooth leachate discharge.

[0039] The following is for reference. Figures 1 to 5 This invention describes a landfill leachate discharge system and landfill structure according to embodiments of the present invention.

[0040] like Figures 1 to 5 As shown, the landfill leachate drainage system according to the first aspect of this utility model can be applied to landfills, improve the leachate drainage capacity of landfills, and ensure smooth drainage during the operation and maintenance of the landfill drainage system.

[0041] The landfill leachate discharge system has a first direction, a second direction, and a vertical direction, wherein the first direction, the second direction, and the vertical direction are arranged perpendicularly to each other. In this embodiment, it is assumed that the first direction is the front-to-back direction, and the second direction is the left-to-right direction.

[0042] like Figures 1 to 5 As shown, the landfill leachate discharge system includes a grating 200 and a cleaning device 400.

[0043] The grating plate 200 has multiple openings 210, which can be arranged in a matrix. The openings 210 extend and penetrate along the thickness direction of the grating plate 200. The grating plate 200 is configured to be installed at the drain hole 150 of the garbage pit. The grating plate 200 is fixedly installed and covers the drain hole 150, allowing leachate in the garbage pit to flow out through the openings 210, thereby achieving the discharge of leachate. One side of the grating plate 200 along its thickness direction is the inner side, and the other side along its thickness direction is the outer side. The inner side of the grating plate 200 is closer to the garbage in the garbage pit. The grating plate 200 has multiple mounting holes, which can be arranged in a matrix. The mounting holes can penetrate both the inner and outer sides of the grating plate 200 and can be circular holes. The number of mounting holes is the same as the number of cleaning devices 400.

[0044] In this embodiment, the grating plate 200 is square-shaped, and rectangular perforations 210 with dimensions of 100mm × 60mm are evenly arranged on the grating plate 200. The perforations 210 serve as screening holes to ensure leachate outflow and block waste. The grating plate 200 can be made of a material with good corrosion resistance, such as weathering steel or stainless steel, to ensure high durability. The thickness direction of the grating plate 200 is the first direction, the length direction of the grating plate 200 is the vertical direction, and the width direction of the grating plate 200 is the second direction.

[0045] Multiple cleaning devices 400 are provided, and each cleaning device 400 is arranged in a one-to-one correspondence with a plurality of mounting holes. The cleaning devices 400 can be made of weathering steel or stainless steel. For a single grating plate 200, the number of cleaning devices 400 can be set according to actual needs, and no specific limit is made here.

[0046] like Figure 2 and Figure 3As shown, the cleaning device 400 includes a sleeve 440, a screw 430, and a folding frame. The sleeve 440 extends along the thickness direction of the grating plate 200 and can be a square or round tube. The inner circumferential surface of the sleeve 440 has an internal thread. The sleeve 440 passes through the mounting hole in the grating plate 200 and can be fixedly connected to the grating plate 200. The screw 430 extends along the thickness direction of the grating plate 200. The screw 430 passes through the sleeve 440 and has an external thread. This external thread connects with the internal thread of the sleeve 440, creating a threaded connection between the screw 430 and the sleeve 440. This allows the screw 430 to rotate relative to the sleeve 440, enabling it to move along its length relative to both the sleeve 440 and the grating plate 200. This allows control over the length of the screw 430 within the grating plate 200. One end of the screw 430 is located inside the grating plate 200, and the other end is located outside the grating plate 200.

[0047] The length of the screw 430 is greater than the length of the sleeve 440, allowing both ends of the screw 430 to protrude from the sleeve 440. The length difference between the screw 430 and the sleeve 440 can be set according to actual conditions and is not specifically limited here.

[0048] The folding frame is parallelogram-shaped, giving it the geometric characteristics of a parallelogram: parallel and equal-length opposite sides, easy deformation, and controllable stability. The folding frame has four connecting rods, which are hinged end-to-end to form a parallelogram-shaped folding structure. The folding frame has folded and unfolded states. When unfolded, the folding frame has the largest area and occupies the most space in the thickness direction of the grating plate 200; when folded, the folding frame has the smallest area and occupies the least space in the thickness direction of the grating plate 200.

[0049] The folding frame is located inside the grating plate 200, close to the garbage in the garbage pit. One end of the folding frame is mounted on the sleeve 440, allowing this end of the folding frame to be fixed relative to the sleeve 440 without moving. The other end of the folding frame is mounted on the screw 430, allowing this end of the folding frame to move linearly along the thickness direction of the grating plate 200 under the action of the screw 430. Moreover, the screw 430 can rotate relative to the folding frame.

[0050] In this embodiment, as Figure 2 and Figure 3As shown, the folding frame structure includes a double connecting rod 410, a first support 421, and a second support 422. The first support 421 and the sleeve 440 are fixedly connected by welding. The second support 422 has a mounting through hole to allow the screw 430 to pass through, enabling a rotatable connection between the second support 422 and the screw 430. For example, a bearing can be provided between the second support 422 and the screw 430, or the screw 430 can have two limiting parts, with the connection between the screw 430 and the second support 422 located between the two limiting parts. The screw 430 can rotate relative to the second support 422 around its own central axis and can drive the second support 422 to move along the thickness direction of the grating plate 200. The shape and size of the first support 421 and the second support 422 are not limited.

[0051] Two double-link rods 410 are provided, and the two double-link rods 410 are symmetrically arranged about the screw 430. The double-link rod 410 is formed by two rods hinged together, and the rods can be square rods, round rods, or rods of other shapes. One end of each double-link rod 410 is hinged to the first support 421 through a hinge shaft, and the other end of each double-link rod 410 is hinged to the second support 422 through a hinge shaft.

[0052] Understandably, in some examples, the hinge axes between the two double links 410 and the first support 421 coincide, and the hinge axes between the two double links 410 and the second support 422 coincide. In other examples, the hinge axes between the two double links 410 and the first support 421 are symmetrically arranged about the screw 430, and the hinge axes between the two double links 410 and the second support 422 are symmetrically arranged about the screw 430. By adjusting the distance between the first support 421 and the second support 422, the two double links 410 can be driven to fold or unfold simultaneously, thereby enabling the folding frame to switch between unfolded and folded states.

[0053] The cleaning device 400 can be installed at the drain hole 150 along with the grating plate 200. The first support 421 and the second support 422 can be made of interlocking large and small channel-shaped steel parts. Of course, the two rods of the double connecting rod 410 can also be made of interlocking large and small steel parts. In the folded state, the two rods of the double connecting rod 410 are folded to overlap each other, and the first support 421 and the second support 422 can be fitted together, which can reduce the space occupied by the folding frame in the folded state.

[0054] The screw 430 is configured to rotate and extend relative to the sleeve 440, so that the screw 430 can drive the folding frame to fold or unfold. The end of the screw 430 away from the folding frame is provided with a drive connection part 431, which is fixedly connected to the screw 430 and is located on the outside of the grid plate 200.

[0055] Understandably, by applying force to the drive connection 431, the screw 430 can be driven to rotate in either the forward or reverse direction. When the screw 430 rotates in the forward direction, it moves relative to the sleeve 440 towards the inside of the grid plate 200, causing the second support 422 to move away from the first support 421, increasing the distance between the first support 421 and the second support 422, thereby allowing the folding frame to fully unfold. When the screw 430 rotates in the reverse direction, it moves relative to the sleeve 440 towards the outside of the grid plate 200, causing the second support 422 to move towards the first support 421, decreasing the distance between the first support 421 and the second support 422, thereby allowing the folding frame to fully fold.

[0056] In this embodiment, the cleaning device 400 further includes a crank handle 500. The crank handle 500 has at least one portion and a mating part that can engage with the drive connection part 431 to establish a drive connection between the crank handle 500 and the screw 430. One of the mating part and the drive connection part 431 has an inner corner hole, and the other has a protrusion that fits into the inner corner hole. In some examples, each screw 430 is equipped with a crank handle 500, and the crank handle 500 and the drive connection part 431 can be fixedly connected or detachably snapped together. In other examples, one crank handle 500 can be used for multiple screws 430, and the crank handle 500 and the drive connection part 431 are detachably snapped together. This cleaning device 400 enables simple manual cleaning when the grating plate 200 becomes clogged.

[0057] Of course, in other embodiments, the cleaning device 400 may also include a rotary driver. The rotary driver is electrically powered and has a rotating shaft that engages with the drive connection part 431. During operation, the rotary driver drives the screw 430 to rotate. The rotary driver can be a motor. The rotary driver can be mounted on a mobile trolley. This cleaning device 400 can automate the dredging process using an electrically driven method.

[0058] It is understandable that since domestic waste contains a certain amount of moisture, it will form leachate when it accumulates. The smooth discharge of leachate from the domestic waste stored in the waste pit is crucial for the subsequent use of the waste and the safety of the waste pit. Therefore, this embodiment designs a reasonable drain hole 150 for draining leachate from the waste pit, allowing the leachate in the domestic waste to be discharged smoothly through the drain hole 150. At the same time, considering that the leachate from domestic waste contains various impurities and sludge, which can clog the grating plate 200 of the drain hole 150 over time, leading to poor leachate discharge in the waste pit and causing the water level in the waste pit to rise, thus affecting the safety of the waste pit, this embodiment adds a cleaning device 400 at the drain hole 150 to ensure that the drain hole 150 of the waste pit can discharge leachate smoothly for a long time.

[0059] When using the leachate discharge system for landfills provided in this embodiment of the invention, if the drain hole 150 of the landfill becomes clogged, workers can apply force to the drive connection 431 on the screw 430 manually or electrically, causing the screw 430 to rotate relative to the sleeve 440. This allows the screw 430 to move along the extension direction of the sleeve 440 towards the inside of the grid plate 200, causing the folding frame to switch from a folded state to an unfolded state under the action of the screw 430. The unfolding action of the folding frame can then push the garbage located inside the grid plate 200, allowing the leachate to form a flow channel again. The flowing leachate can disperse the clogged sludge, thus achieving smooth discharge of leachate and removal of sludge. Furthermore, the cleaning device 400 has a unique and simple structure, low cost, and a certain number of cleaning devices 400 can be selected for operation according to actual conditions, resulting in low operating costs.

[0060] After the dredging work is completed, the drive screw 430 rotates in the opposite direction, so that the screw 430 can drive the folding frame to move, causing the folding frame to switch from the unfolded state to the folded state.

[0061] In the normal sewage discharge state of the grating plate 200, the cleaning device 400 is in the closed state and can be closed within the sewage outlet 150. When siltation occurs, it is necessary to drive the screw 430 to rotate, so that the screw 430 drives the folding frame to move. During the unfolding process, the folding frame can push the garbage in the garbage pit, allowing the leachate in the garbage pit to circulate, thereby enabling the leachate in the garbage pit to be discharged smoothly.

[0062] The cleaning device 400 adopts a parallelogram-shaped folding frame, which can increase the contact area between the cleaning device 400 and the garbage, expand the space for leachate to flow, and utilize the structural stability of the folding frame during the unfolding process to allow the folding frame to apply a stable squeezing effect on the garbage, which is conducive to improving the dredging effect.

[0063] This embodiment solves the problem of leachate filtration and discharge, and also addresses the issue of blockage and siltation of the perforation 210 during long-term operation of the landfill. Furthermore, the cleaning device 400 has a simple structure, is easy to install, and requires no large equipment or frequent maintenance, achieving effective leachate discharge from the landfill at low cost.

[0064] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, the grating plate 200 is provided with multiple stiffening crossbeams 220, which are arranged at certain intervals along the vertical direction and are fixedly connected to the grating plate 200. The length of the stiffening crossbeams 220 extends along a second direction. The stiffening crossbeams 220 can be set on the inner side or the outer side of the grating plate 200. This design increases the stiffness of the grating plate 200 against horizontal thrust, prevents the grating plate 200 from easily deforming, and helps extend the service life of the grating plate 200. Moreover, the folding frame is configured to be stored in the groove of the stiffening crossbeam 220 when folded, thus effectively utilizing the groove space of the stiffening crossbeam 220 to store the folding frame.

[0065] In this embodiment, the stiffening beam 220 is a channel steel component. The stiffening beam 220 can separate the holes 210, thereby creating multiple sets of holes 210.

[0066] Furthermore, the stiffening crossbeam 220 is located inside the grating plate 200, and the stiffening crossbeam 220 is provided with a through hole 240, which can be a circular hole. Both the mounting hole and the through hole 240 extend along the thickness direction of the grating plate 200, and they are interconnected. The sleeve 440 passes through the mounting hole and the through hole 240 along the thickness direction of the grating plate 200. The folding frame is configured to contact the stiffening crossbeam 220 in the folded state, and the folding frame extends along the extension direction of the stiffening crossbeam 220. In this embodiment, the through hole 240 is located at the middle position of the stiffening crossbeam 220.

[0067] In some embodiments, the landfill leachate discharge system further includes a reinforcing beam 600. The reinforcing beam 600 is located at the discharge hole 150 and is situated outside the grating plate 200. The reinforcing beam 600 extends along a second direction and is fixedly installed. Multiple reinforcing beams 600 are provided, and each of these beams corresponds to multiple stiffening beams 220 along the thickness direction of the grating plate 200. Both ends of the sleeve 440 are fixedly connected to the stiffening beams 220 and the reinforcing beams 600, respectively. In this embodiment, the reinforcing beam 600 is a channel steel component. It is understood that the reinforcing beams 600, sleeves 440, and stiffening beams 220 are fixed together to form a stable structure, thereby ensuring that the cleaning device 400 receives sufficient support and preventing deformation of the sleeves 440 and the screw 430.

[0068] like Figures 1 to 5 As shown, the waste pit structure according to the second aspect embodiment of this utility model can be applied in waste-to-energy plants for storing waste. The waste pit structure includes a pit body and a leachate discharge system as described in the first aspect embodiment. The pit body has a cavity for storing waste, and the pit body is provided with a plurality of discharge holes 150, which are connected to the cavity and can discharge leachate from the cavity. The leachate discharge system is located at the discharge holes 150 and can perform a sludge removal effect when the discharge holes 150 become blocked.

[0069] In some embodiments, a reinforced concrete concealed beam 110 is provided at the upper end of the drain hole 150, and reinforced concrete concealed columns 120 are provided on both sides of the drain hole 150. The reinforced concrete concealed beam 110 extends along a second direction, and the reinforced concrete concealed columns 120 extend along a vertical direction and are perpendicularly connected to the reinforced concrete concealed beam 110. Furthermore, the grating plate 200 is connected to the reinforced concrete concealed beam 110 and the reinforced concrete concealed columns 120 respectively. Through the cooperation of the reinforced concrete concealed beam 110 and the reinforced concrete concealed columns 120, the grating plate 200 can withstand the lateral horizontal load transmitted by the grating plate 200 when blocking garbage in the pool.

[0070] In this embodiment, the grating plate 200 is provided with connection holes 230, which enables the grating plate 200 to be fixedly connected to the reinforced concrete hidden beam 110 and the reinforced concrete hidden column 120 by pre-embedded bolts. After installation, the connection nodes between them are covered and protected by post-poured concrete.

[0071] like Figures 1 to 4As shown, the pool body includes not only reinforced concrete concealed beams 110 and reinforced concrete concealed columns 120, but also concrete frame flat beams 130 and concrete frame columns 140. Within the pool body, one to two drain holes 150 are provided between every two concrete frame columns 140. Stainless steel anchors and embedded parts 300 can be pre-embedded in the drain holes 150 to facilitate the installation of the grating plate 200 and the reinforcing beam 600. The embedded parts 300 can be made of weathering steel or stainless steel.

[0072] The inner side of the grating plate 200 is designated as the waste pool side, and the outer side of the grating plate 200 is designated as the leachate ditch side. A drainage ditch 160 is provided on the outer side of the pool, through which leachate can be discharged from the grating plate 200 to the drainage ditch 160. The drainage ditch 160 extends along a second direction.

[0073] In the construction of the waste pit structure in this embodiment, the reinforced concrete concealed beams 110, reinforced concrete concealed columns 120, concrete frame flat beams 130, concrete frame columns 140, and reinforced concrete waste pit walls are uniformly cast in place after structural calculations and design, with a pre-reserved sewage discharge hole 150, and pre-embedded fixing anchors and embedded parts 300. After the above-mentioned concrete components reach the required strength, the prefabricated grating plate 200 is installed, and a secondary grouting method is used at the connection between the grating plate 200 and the concrete components to protect the connection joint.

[0074] Then, the cleaning device 400 is installed on the stiffening beam 220 of the grating plate 200. Embedded parts 300 are installed on the leachate ditch side of the reinforced concrete concealed column 120 at positions corresponding to the stiffening beam 220. The reinforcing beam 600 is installed through the embedded parts 300. Two symmetrically arranged reinforcing beams 600 are provided on opposite sides of the sleeve 440, with the spacing between the two reinforcing beams 600 sufficient to allow the sleeve 440 to pass through. The opposite ends of the two reinforcing beams 600 are simultaneously fixedly connected to the sleeve 440. The reinforcing beams 600 and the stiffening beam 220 form a support structure, facilitating the passage and installation of the screw 430.

[0075] When storing waste in a waste pit structure, leachate can leak out through the holes 210 on the grid plate 200 at the drain hole 150, and be discharged into the leachate collection tank through the drainage ditch 160. Finally, the leachate is pumped to the leachate treatment station for treatment until it meets the standards and is then reused.

[0076] To prevent clogging of the grating 200, regular inspection and maintenance are necessary. When clogging occurs, the clogged area should be cleared. At this time, workers can use the crank handle 500 to drive the screw 430, causing the folding frame to unfold, compressing the garbage in the waste pit, moving it away from the inner surface of the grating 200, thus allowing leachate to flow and dispersing the sludge at the clogged area. After clearing, the crank handle 500 drives the screw 430 to rotate in the opposite direction, causing the folding frame to retract and close, completing the switch from the unfolded to the folded state, preventing the cleaning device 400 from interfering with the grab bucket's ability to handle garbage in the waste pit.

[0077] This embodiment of the utility model establishes a suitable load-bearing system consisting of reinforced concrete concealed columns 120, reinforced concrete concealed beams 110, concrete frame columns 140, and concrete frame flat beams 130. It also includes suitable drainage holes 150 and grating plates 200, and is equipped with a simple, easy-to-operate, and economical cleaning device 400. This effectively removes leachate from the garbage and ensures that the concrete components and grating plates 200 of the garbage pit structure can resist the lateral thrust generated during garbage stacking. Simultaneously, the cleaning device 400 effectively removes blockages from the drainage holes 150 when they become clogged, allowing for smooth sewage discharge. Ultimately, this achieves smooth drainage and regular cleaning of leachate, and is both economical and reasonable.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A leachate discharge system for landfills, characterized in that, include: A grating plate is configured to be installed at the drain hole of a garbage pit, wherein the two sides of the grating plate along its thickness direction are the inner side and the outer side, and the grating plate is provided with a plurality of mounting holes penetrating the inner side and the outer side. A cleaning device is provided in multiple parts, each corresponding to one of the mounting holes. The cleaning device includes a sleeve, a screw, and a parallelogram-shaped folding frame. The sleeve extends along the thickness direction of the grating plate and passes through the mounting hole. The screw passes through the sleeve and is threaded to the sleeve. The folding frame is located inside the grating plate, with one end of the folding frame on the sleeve and the other end on the screw. The screw is configured to rotate and extend relative to the sleeve to drive the folding frame to fold or unfold. The end of the screw away from the folding frame has a drive connection part located outside the grating plate.

2. The landfill leachate discharge system according to claim 1, characterized in that, The grating plate is provided with multiple stiffening crossbeams arranged at intervals along the vertical direction, and the stiffening crossbeams are fixedly connected to the grating plate.

3. The landfill leachate discharge system according to claim 2, characterized in that, The stiffening crossbeam is located inside the grating plate. The stiffening crossbeam has a through hole. The mounting hole and the through hole both extend along the thickness direction of the grating plate and are connected. The sleeve passes through the mounting hole and the through hole along the thickness direction of the grating plate. The folding frame has a folded state and an unfolded state. The folding frame is configured to contact the stiffening crossbeam in the folded state, and the folding frame extends along the extension direction of the stiffening crossbeam.

4. The landfill leachate discharge system according to claim 3, characterized in that, It also includes reinforcing beams, which are located at the drain hole and on the outside of the grating plate. Multiple reinforcing beams are provided and are respectively arranged in a corresponding manner to the multiple stiffening beams along the thickness direction of the grating plate. The two ends of the sleeve are fixedly connected to the stiffening beams and the reinforcing beams, respectively.

5. The landfill leachate discharge system according to claim 4, characterized in that, The reinforcing beam and the stiffening beam are channel steel components.

6. The landfill leachate discharge system according to claim 5, characterized in that, The folding frame is configured to be stored in the groove of the stiffening beam when folded.

7. The landfill leachate discharge system according to claim 1, characterized in that, The cleaning device further includes a crank handle, which has at least one crank handle and a mating part that can engage with the drive connection part; or, the cleaning device further includes a rotary driver, which is electric and has a rotating shaft that can engage with the drive connection part.

8. The landfill leachate discharge system according to claim 1, characterized in that, The folding frame includes a double connecting rod, a first support, and a second support. The first support is fixedly connected to the sleeve, and the second support is rotatably connected to the screw. There are two double connecting rods, which are symmetrically arranged about the screw. One end of the double connecting rod is hinged to the first support, and the other end is hinged to the second support.

9. A garbage pit structure, characterized in that, include: Landfill leachate discharge system as described in any one of claims 1 to 8; The pool body is provided with several drainage holes, and the leachate drainage system of the garbage pool is located at the drainage holes.

10. The garbage pit structure according to claim 9, characterized in that, The upper end of the sewage outlet is provided with a reinforced concrete hidden beam, and the two sides of the sewage outlet are provided with reinforced concrete hidden columns. The grating plate is connected to the reinforced concrete hidden beam and the reinforced concrete hidden columns respectively.

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