310results about "Landfill technologies" patented technology

To provide a method for backfilling a borehole, which enables the borehole to be backfilled with high accuracy, and to provide a filler-containing swelling-retardant granular material for backfilling a borehole.SOLUTION: A method for backfilling a borehole involves transporting a container filled with a swellable filler, a plurality of filler-containing swelling-retardant granular materials having a swelling-retardant layer that coats a surface of the swellable filler and delays the onset of swelling of the swellable filler, and water to a predetermined position within the borehole, and then releasing the plurality of filler-containing swelling-retardant granular materials and the water from the inside to the outside of the container, causing the water to penetrate the swellable filler in the plurality of filler-containing swelling-retardant granular materials, thereby causing the swellable filler to collapse the swelling-retardant layer and swell, thereby backfilling the borehole.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of geomembrane laying assistance, and provides a geomembrane flattening structure which comprises a pair of supports and a pair of moving wheels, the moving wheels are arranged at the lower ends of the supports, shaft seats are rotatably connected in the supports, a bulldozing assembly is arranged on the supports, a locking assembly is arranged on one side of each support, and the bulldozing assembly comprises a fixing column. The fixed column is arranged on the side surface of the support, the fixed column is rotationally sleeved with a swing frame, an extension rod is movably sleeved with the swing frame, and a long hole is formed in the surface of the swing frame. By means of the technical scheme, the problems that in the prior art, when a geomembrane is flattened, a traditional geomembrane flattening mode is usually adopted, a geomembrane roll is rotated and flattened by manually pulling a roller body, the defects still exist in the operation process, the needed labor intensity is large, the working efficiency is low, wrinkles are likely to occur in the flattening process, and the working efficiency is high are solved. The flattening device is not attached to the laid ground, and the flattening effect is poor.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system comprising well piping, the landfill gas having a first temperature when extracted, the control system comprising: a gas composition chamber coupled to the well piping and comprising at least one sensor configured to measure one or more characteristics of a landfill gas sample in the gas composition chamber; a temperature control mechanism configured to heat the landfill gas sample in the gas composition chamber to a second temperature at least a threshold amount greater than the first temperature; and a controller configured to control the at least one sensor to measure the one or more characteristics of the landfill gas sample in the gas composition chamber when a temperature of the landfill gas sample in the gas composition chamber is at least the threshold amount greater than the first temperature.

The utility model relates to the technical field of flexible freight bags, in particular to a special landfill flexible freight bag and a construction method thereof. The special landfill container bag comprises a waterproof inner bag and an outer bag, and the waterproof inner bag is processed into a complete inner bag by adopting a thermoplastic forming process; the outer bag is connected to the exterior of the waterproof inner bag and used for positioning the periphery of the waterproof inner bag to prevent the volume of the waterproof inner bag from being expanded, and the outer bag is inelastic; material pouring ports are formed in the waterproof inner bag and the outer bag, the material pouring pipe comprises an inner material pouring pipe and an outer material pouring pipe which are matched with each other, the inner material pouring pipe is arranged on the material pouring port of the waterproof inner bag in a thermoplastic mode, and the material pouring port of the outer bag is connected with the outer material pouring pipe. The double-layer structure is adopted, the inner bag is waterproof, the outer bag is used for limiting the periphery of the inner bag and preventing the inner bag from being broken, polyethylene and polypropylene are preferably selected as raw materials, cost is low, and sealing performance is good.

The invention provides a stock garbage in-situ dehydration method and system based on air foam displacement. The method is used for carrying out dehydration treatment on the refuse heap of the refuse landfill. The method comprises the steps that a vertical shaft is hit into a garbage heap, and a plurality of percolation holes are formed in the peripheral wall of the vertical shaft; air foam is injected into the vertical shaft, and the air foam moves along the vertical shaft and displaces percolate in the garbage heap through the percolation holes; detecting whether the water content of the garbage heap in the preset depth is smaller than a preset water content threshold value or not; if yes, air foam injection into the vertical shaft is stopped, and air is injected into the vertical shaft; detecting whether the gas concentration reaches a preset standard threshold value or not; if yes, air injection into the vertical shaft is stopped. According to the stored garbage in-situ dehydration method and system based on air foam displacement, the water content of the garbage heap can be further reduced, the dehydration effect of the heterogeneous garbage heap can be effectively improved, and meanwhile harmful gas can be treated.

A coffin is provided, and the coffin includes a coffin body with a top opening and a coffin lid for closing the coffin body. The coffin lid is provided with an air intake hole and an exhaust air hole, the air intake hole and the exhaust air hole are respectively connected to an air intake device and an exhaust air device through pipelines to supply the oxygen required for decomposition of a body and exhaust waste gases. The coffin lid is further provided with an exhaust liquid pipe connected to a peristaltic pump. An oxygen or carbon dioxide sensor, and a hydrogen sulfide or ammonia concentration sensor are installed in an exhaust channel. The coffin body includes a plastic waterproof bag, and the coffin lid is pasted with adhesive plastic film. The function of the plastic waterproof bag is to prevent waste liquids from polluting the coffin body.

The invention discloses a high-strength puncture-resistant composite film, and relates to the technical field of composite films, the high-strength puncture-resistant composite film comprises a surface protection layer, a first reaction layer, a second reaction layer, a third reaction layer and a bottom protection layer which are arranged in sequence; the first reaction layer is prepared from nylon 6 and an amino silane coupling agent; the second reaction layer is made of thermoplastic polyurethane, and a containing channel and cyanoacrylate located in the containing channel are arranged in the second reaction layer; the third reaction layer comprises polypropylene, calcium carbonate and imidazolium ionic liquid; when the composite film is punctured, the cyanoacrylate is in contact with the amino silane coupling agent to generate curing reaction, so that a punctured object is fixedly clamped at the position penetrating through the first reaction layer; the imidazolium ions are in contact with the cyanoacrylate to generate polymerization reaction and form a polymer, and the calcium carbonate is in contact with the leachate to release CO2, so that the polymer is forced to be pressed into a puncture hole, and a puncture object is further retained, so that the anti-puncture effect of the composite membrane is relatively good.

The application discloses a semi-closed valley type dangerous waste flexible landfill site, a base, a slope and a garbage dam are enclosed to form a semi-closed valley type landfill site area, and the landfill site further comprises a roof, middle columns, side columns, an anti-seepage system, a leachate collection and drainage system and a groundwater drainage system; the roof is used for stopping rain on the upper part of the landfill site area; the middle columns are located in the landfill site area and used for supporting the roof; the side columns are located at the periphery of the landfill site and form an enclosure structure; the anti-seepage system is divided into a base anti-seepage system used for base anti-seepage, a slope anti-seepage system used for slope anti-seepage and a middle column anti-seepage system used for middle column anti-seepage; the leachate collection and drainage system is inserted in the base anti-seepage system and used for collecting and draining leachate; and the groundwater drainage system is located below the base anti-seepage system and used for draining groundwater. The application can greatly reduce leachate generation and effectively solve the problems of high leachate treatment operation cost and environmental pollution.

The utility model discloses an isolating layer for heavy metal combined pollution soil reclamation, which comprises a foundation pit, and an isolating mechanism is arranged in the foundation pit. The isolation mechanism comprises a base, a fixing frame, a threaded groove, an isolation cover, a top cover, an inserting plate, an inserting groove, a rotary knob, a first single-groove belt wheel, a first belt, a second belt, a second single-groove belt wheel, a first rotating shaft, a second rotating shaft, a threaded rod, a groove, a cavity and a double-groove belt wheel. The four inserting plates are located at the front end and the rear end of the two sides of the outer surface of the upper end of the base correspondingly, the two fixing frames are located on the two sides of the middle of the outer surface of the upper end of the base correspondingly, and the threaded grooves are formed in the outer surfaces of the upper ends of the fixing frames. According to the isolation layer for heavy metal combined pollution soil reclamation, the isolation cover and the base can be rapidly assembled and disassembled, operation is easy, isolation can be conveniently conducted through the isolation cover, damage to new soil caused by external personnel or birds and beasts is reduced, and better use prospects are brought.

The invention relates to a disposal method for incineration residues and a disposal system for incineration residues, and provides a technology capable of promoting decomposition of incineration residue components by microorganisms and shortening the stabilization period in the case of landfill and final disposal of incineration residues. The disposal method for the incineration residue comprises the steps of: landfill of the incineration residue in a landfill section provided in a landfill land; a step of providing a sheet material for covering the landfill surface of the incineration residue in the landfill section; and a step for supplying water to the lower part of the sheet by using a watering device to maintain the water content in the landfill located below the sheet at 5-30%. The water content may be maintained at 10-25% by the supply of water using the watering device.

We propose a ground material using crushed clay tiles that can reduce turbidity when used underwater, and a method for reclamating seabeds using this ground material. [Solution] This is a ground material made by mixing crushed clay tiles and sand. The fine-grained content of the crushed clay tiles, including silt and clay, is 20% or less, the maximum particle size is 30 mm or less, and the 50% particle size is 10 mm or less. The maximum particle size of the sand is 2.0 mm, and the mixing ratio of sand to dry weight is in the range of 20% to 60%. When filling the bottom of a body of water with this ground material, it is moistened by soaking it in water before being placed in the water.

To provide a drainage determination method which can reduce the burden of filling work with a hydrophobic material, efficiently form an underdrain, and eliminate the consumption of unnecessary hydrophobic material, thereby reducing wasteful costs.SOLUTION: A drainage determination method 60 can determines whether the drainage of the ground in a field is good or bad before a long culvert trench is formed in the field, and includes training data acquisition step S51, model generation step S52, N-value measurement step S61, first image for determination capturing step S62-1, input data for determination acquisition step S63-1, determination step S64, poor determination transmission step S65, hydrophobic material filling step S66, and closing step S67.SELECTED DRAWING: Figure 5

Provided is a method for dehydrating a spiral membrane element, which can effectively remove moisture contained in a used spiral membrane element by a simple method. The method for dehydrating a spiral membrane element according to the present invention is a method for dehydrating a spiral membrane element E that contains moisture, the spiral membrane element E having a winding body and a perforated center tube, the winding body including a plurality of membrane sheets wound on the center tube and having a permeation-side flow path inside. Furthermore, the method for dehydrating a spiral membrane element according to the present invention includes a step of forming an opening (for example, an end face opening formed by a cut surface 16) that communicates the permeation-side flow path with the outside on the plurality of membrane sheets, and a step of applying a centrifugal force to the spiral membrane element on which the opening is formed.

The present invention discloses a method for determining the landfill age of stockpiled waste based on humus composition, which relates to the technical field of environmental protection. The method for determining the landfill age of stockpiled waste based on humus composition disclosed by the present invention includes the following steps: drilling and sampling the stockpiled waste; performing pre-treatments such as air-drying, screening, and impurity removal on the samples; measuring the humus composition and its content to obtain the carbon content of humic acid; measuring the three-dimensional fluorescence of the leaching solution of humic acid extracted from humus soil and performing parallel factor analysis to obtain the total fluorescence intensity of humic acid-like substances therein; fitting the unit fluorescence index F<subgt;u< / subgt; with the landfill age in the form of an exponential function; and then performing statistical analysis on the unit fluorescence index F<subgt;u< / subgt> and the landfill age. The method for determining the landfill age of stockpiled waste based on humus composition and its three-dimensional fluorescence intensity provided by the present invention is fast and simple, and can intuitively determine the stabilization degree and landfill age of the stockpiled waste in the landfill.

The present invention provides an in-situ dehydration method and system for stock garbage based on air foam displacement. The method is used to dehydrate garbage piles in landfills. The method comprises: driving a vertical shaft into the garbage pile, with a plurality of infiltration holes provided on the peripheral wall of the vertical shaft; injecting air foam into the vertical shaft, the air foam moving along the vertical shaft and displacing leachate in the garbage pile through the infiltration holes; detecting whether the moisture content of the garbage pile within a preset depth is less than a preset moisture content threshold; if so, stopping injecting air foam into the vertical shaft and injecting air into the vertical shaft; and detecting whether the gas concentration reaches a preset standard threshold; if so, stopping injecting air into the vertical shaft. The in-situ dehydration method and system for stock garbage based on air foam displacement provided by the present invention can further reduce the moisture content of the garbage pile, and can effectively improve the dehydration effect of heterogeneous garbage piles and simultaneously treat harmful gases.

The invention provides a high-density polyethylene composite geomembrane and a production process thereof, and the high-density polyethylene composite geomembrane comprises a cast film and geotechnical cloth. The cast film is prepared from the following raw materials: 52 to 68 parts of high-density polyethylene, 6 to 12 parts of modified metallocene polyolefin-graphene compound, 4 to 9 parts of modified polyolefin-ethylene-vinyl alcohol master batch, 5 to 10 parts of alpha-olefin ethylene copolymer, 3 to 7 parts of vinyl elastomer, 1 to 3 parts of polytetrafluoroethylene micro powder, 0.1 to 0.3 part of antioxidant, 0.2 to 0.5 part of ultraviolet stabilizer and 0.1 to 0.3 part of lubricant. And 1.5-3 parts of an ultraviolet screening agent. The composite geomembrane obtained by the invention has the advantages of high strength, high toughness, high impermeability, excellent pollution resistance, excellent weather resistance, high puncture resistance, firm membrane-cloth combination, good thickness uniformity and the like.

The application relates to the technical field of water conservancy engineering foundation pit pipe well landfill, and particularly discloses a water conservancy engineering foundation pit pipe well landfill construction method, which specifically comprises the following steps: early preparation, construction preparation, landfill operation and post-treatment. The water conservancy engineering foundation pit pipe well landfill construction method is also used in a water conservancy engineering foundation pit pipe well landfill construction device, which comprises a fixing mechanism and a moving mechanism. According to the cooperation between the fixing mechanism and the moving mechanism, the filling material of the foundation pit can be filled layer by layer during the process of filling the foundation pit pipe well. The filling material is continuously filled layer by layer, and the filling process can be vibrated, so that the filling material is uniformly distributed and compacted, the filling layer has better stability, the continuous layer-by-layer filling method can make the landfill operation more standardized, and the filling work can be more efficiently completed.

The utility model provides a stabilizing treatment system for a household garbage landfill, which comprises a PLC (Programmable Logic Controller) control device which is respectively connected with a gas extraction well, a water replenishing well and a gas injection well through a gas extraction pipeline, a water replenishing pipeline and a gas injection pipeline; a monitoring and control device and a pollutant treatment device are arranged in each of the air exhaust pipeline and the air injection pipeline; and a monitoring and control device and a pollutant treatment device are also arranged in the water replenishing pipeline. According to the system, through arrangement of various devices, a good oxygen-enriched environment is formed in the domestic garbage body, rapid decomposition of organic matter in a domestic garbage heap body can be accelerated, the purpose of rapidly degrading the organic matter in the domestic garbage heap body is achieved, the domestic garbage in the heap body is stabilized, and garbage excavation and site comprehensive utilization in the later period are facilitated.

The utility model discloses an anti-seepage construction auxiliary device for a garbage pool, which belongs to the technical field of anti-seepage of garbage pools of power plants and comprises a movable base, a liquid storage container, a spraying component and a brushing component. The liquid storage container is arranged on the movable base, the liquid storage container is used for containing anti-seepage liquid, and an injection opening is formed in the top end of the liquid storage container; the spraying assembly comprises a connecting pipe connected with the liquid storage container and a spraying opening formed in an outlet of the connecting pipe, and a pump communicated with the connecting pipe is arranged in the liquid storage container; the brushing assembly comprises a connecting rod and a roller brush arranged on the connecting rod, and a main body used for supporting the connecting rod is arranged on the movable base; the spraying assembly and the brushing assembly are located on different sides of the movable base, so that the spraying assembly and the brushing assembly do not interfere with each other. According to the spraying device, the working efficiency of spraying the garbage pool can be improved.

The utility model discloses a special lifting tool for a hazardous waste disposal box, which comprises a lifting appliance beam and two hangers, four lifting hook tools are arranged on the lifting appliance beam, the top surface of the lifting appliance beam is rectangular, the four lifting hook tools are respectively arranged corresponding to four corner points of the rectangle, two symmetrically arranged lifting seats are arranged on the top surface of the lifting appliance beam, and the hangers are arranged on the lifting appliance beam. The two hanging racks are connected in parallel, the four lifting hook tools are divided into two groups which are symmetrically arranged, each group of lifting hook tools corresponds to one hanging rack, each lifting hook tool comprises a lifting hook sheet which is rotatably mounted, and the lifting hook sheets can be connected with the hanging racks in a hooking manner. The lifting hook tool has the remote control hooking and unhooking capability, workers do not need to enter a warehouse for unhooking operation, and the operation safety risk can be effectively avoided.

The present invention relates to a layered gas injection well for a domestic waste landfill, which comprises a vertical sleeve provided with an air outlet in the sleeve part and a liftable gas injection head located in the vertical sleeve. The liftable gas injection head includes a sling, a central pipe connected to the lower end of the sling, an upper inflatable sealing capsule connected to the upper end of the central pipe, a lower inflatable sealing capsule connected to the lower end of the central pipe, an upper inflatable sealing capsule gas injection pipe, a lower inflatable sealing capsule gas injection pipe and a waste gas injection pipe. The vertical sleeve can extend from the stable degradation layer to the undegraded layer. The present invention also relates to a layered gas injection method for a domestic waste landfill. The first step is to excavate a gas injection well at a predetermined point in the domestic waste landfill to the stable degradation layer and lower the vertical sleeve into the gas injection well. The second step is to inject gas into the five waste layers. The present invention has the advantage that each waste layer can share the gas injection cavity for layered gas injection, and solves the problem of the excessively large range of the closed space existing in the existing layered gas injection with each gas injection cavity independently arranged.

The utility model discloses a combined pile foundation for reinforcing a prestressed pipe pile, and belongs to the technical field of constructional engineering, the combined pile foundation comprises a foundation part and a pipe pile part, the foundation part comprises an upper structure foundation, a plain concrete cushion layer, a garbage landfill layer and a bearing stratum soil body from top to bottom, and the pipe pile part comprises the prestressed pipe pile, a steel pipe pile and a reinforcement cage; a steel grouting floral tube I is inserted into the reinforcement cage; the prestressed pipe pile is novel in design and ingenious in device, by arranging the first steel grouting floral tube, the steel rod, the steel plate, the pushing blocks, the inserting plate and the drill bit, the steel rod is rotated to drive the multiple pushing blocks to rotate, the pushing blocks output pushing force, under the action of the pushing force, the inserting plate extends out of the steel plate, the firmness of the first steel grouting floral tube is improved through the inserting plate, and therefore the stability of the prestressed pipe pile is enhanced; when the first steel grouting floral tube is inserted, the drill bit can go deep into the bottom layer more quickly and conveniently, and the stability is improved while the use efficiency is improved.

The invention relates to the technical field of civil engineering equipment, and discloses a geomembrane welding device which comprises a supporting bottom plate, and outer plates are arranged on the two sides of the bottom of the supporting bottom plate; moving parts are arranged on the outer walls of the outer plates; power parts are arranged on the inner walls of the outer plates; a middle plate is arranged in the center of the bottom of the supporting bottom plate, side plates are arranged on the two sides, located on the inner side of the outer plate, of the middle plate, second rails are arranged at the bottoms of the side plates, a set of matched second sliding blocks are arranged on the second rails on the two sides, a moving plate is arranged between the bottoms of the two sets of second sliding blocks, and the two sides of the moving plate are mechanically linked with the power part through second clamping blocks; a supporting rod is inserted into the middle of the movable plate, a second electrostatic adsorption plate is arranged at the bottom of the supporting rod, a shaft is inserted into the upper portion of the supporting rod, a limiting pulley is arranged at one end of the shaft, and a hollow-out convex guide groove matched with the limiting pulley is formed in the middle plate. The method has the beneficial effect that the two geomembranes can be welded in an overlapped mode.

The present invention discloses a method for detecting leakage in a solid waste landfill, comprising a plurality of pre-buried electrodes. The pre-buried electrode array is buried in the soil surrounding the landfill area, and the soil resistivity between adjacent pre-buried electrodes is used to identify whether there is a leak along the path. The pre-buried electrodes include hollow balls and wires. The detection device also includes a pipe system and a suction pump. The pipe system includes a main pumping pipe, a main water supply pipe, a plurality of flow pipes, and a branch valve. The hollow balls are buried in the soil surrounding the landfill area. The inner cavity of each hollow ball is connected to a flow pipe. The end of each flow pipe away from the hollow ball is connected to the main pumping pipe and the main water supply pipe in the form of a branch pipe. The branch pipes are respectively provided with a branch valve. One end of the main pumping pipe is connected to the suction pump inlet, and the main water supply pipe is connected to the water supply source. The surface of the hollow ball is provided with a plurality of flow holes. The hollow ball is conductive and connected to an external DC power supply via a wire. When the hollow ball is connected to the negative electrode via the wire, the hollow ball is connected to the main pumping pipe via the flow pipe.

The utility model discloses a soil pollution obstructing structure, including support arm, winding mechanism, spacing subassembly and retaining mesh cloth, wherein the spacing subassembly is installed on the corresponding support arm respectively, winding mechanism includes support seat, support table, drive device and winding subassembly, the support table is fixedly connected to the top of support seat, the drive device is connected to the support seat, the retaining mesh cloth is fixed on the support seat, and the retaining mesh cloth is fixed on the support seat. The driving device is installed at the bottom of the supporting table, the winding assembly is rotationally connected to the top of the supporting table, the output end of the driving device is fixedly connected with one end of the winding assembly, and one end of the fence mesh sequentially passes through the limiting assemblies on the multiple supporting arms and is connected with the winding assembly. Therefore, one end of the fence net cloth sequentially passes through the multiple limiting assemblies through the limiting head, then the limiting head at one end of the fence net cloth is installed on the winding assembly, finally, the driving device is started, the fence net cloth can be driven to be conveniently and rapidly tightened through a pull rope, the fence net cloth does not need to be wound for multiple times, and therefore the fence net cloth is more convenient and rapid to use. And the length requirement is reduced.

The utility model discloses a dump pit drainage hole dredging device which comprises an outer shell, a dump pit is fixedly connected in the outer shell, a leachate gallery is fixedly connected in the outer shell, a hydraulic station is movably connected to the side face of the outer shell, and a control cabinet is movably connected to the side face of the outer shell. A second motor is fixedly connected to the upper end of the hydraulic station, a hydraulic pipe is fixedly connected to the side face of the hydraulic station, a door plate is movably connected to the side face of the control cabinet, a data panel is fixedly connected to the door plate, an anti-explosion camera is fixedly connected to a rotating shaft, and a movably-connected conical head piston sleeves a rotating rod. A threaded hole is formed in the conical head piston, a plurality of brushes are fixedly connected to the conical head piston, and the brushes are movably connected into the pipeline. By means of the structure, the complex and changeable garbage blocking situation is effectively dealt with, the manual operation risk is reduced, visual and safe visual feedback is provided for operators, and the dredging effect and applicability are enhanced.

Composite material for drainage and filling at landfill sites, aimed at biogas and leachate collection from the mass of waste. Such composite material includes: (a) at least one thermoplastic material; (b) optionally, a multilayer laminated plastic material; and (c) sand, at concentrations of ≥ 16 % by weight based on the total weight of the composition. The disclosure also relates to a process for manufacturing the composite material and to the uses for which the material may be intended at a landfill site.

The application relates to a method for detecting the water impermeability of a lap-jointed waterproof roll material joint, and is characterized by comprising the following steps: S1, sample pretreatment; and S2, sample detection. The application can not only eliminate the height difference of the roll material after lap joint, but also concentrate the pressure on the joint corresponding to the whole detection joint, while keeping the sample flat and the pressure on the lap joint uniform, preventing the lap joint from being depressed and collapsed due to the self weight, and accurately detecting the water impermeability of the waterproof roll material joint. On the other hand, the width of the detection joint can be adjusted, which not only meets the detection needs of different types of lap joint roll materials, but also can obtain the width corresponding to the limit water impermeability of the lap joint roll material by changing the size of the detection joint, so that the strength of the water impermeability of different roll materials and different lap joint widths can be determined.

The utility model relates to a garbage leachate dredging device, and belongs to the technical field of garbage treatment devices, and the garbage leachate dredging device comprises a dredging module which comprises a prefabricated frame connected with a leachate grating plate and a dredging assembly installed on the prefabricated frame in a sliding manner and used for dredging the leachate grating plate; the power driving part is installed on the prefabricated frame and used for driving the dredging assembly to slide in a reciprocating mode to conduct dredging work; the prefabricated frame can be directly fixed to a wall, the dredging assembly comprises a ram plate and a plurality of dredging columns, the ram plate is slidably mounted on the prefabricated frame, the dredging columns are fixedly mounted on the ram plate and used for dredging a leachate grating plate, and the dredging columns are arranged on the ram plate at intervals. The dredging device has the effect of improving the field installation efficiency of the dredging device.