78results about How to "Improve drainage capacity" patented technology

The utility model discloses a radial tire for engineering machinery, which relates to the field of tire design and comprises a tire tread, a linear pattern wall and a U-shaped pattern wall are fixedly mounted on the periphery of the tire tread, a first reinforcing rib is fixedly mounted between the linear pattern wall and the U-shaped pattern wall, and a second reinforcing rib is fixedly mounted between the linear pattern wall and the U-shaped pattern wall. Side pattern walls are fixedly mounted on the periphery of the tire tread and located on the front side and the rear side of the linear pattern wall, shoulder pattern walls are fixedly mounted on the periphery of the tire tread and located on the front side and the rear side of the side pattern walls, and shoulder grooves are formed in the surfaces of the shoulder pattern walls. The height of the first reinforcing ribs is reasonably arranged, the connecting strength between the pattern walls is enhanced, the overall tear resistance is improved, the second reinforcing ribs are matched, the overall rigidity of the tire is remarkably enhanced, the performance of the tire is improved, and the service life of the tire is prolonged.

The utility model relates to the technical field of retaining walls, and discloses a garden landscape stone ecological retaining wall structure which comprises landscape stone bodies, an arch-shaped retaining wall is arranged between the two landscape stone bodies, a stabilizing assembly is arranged between the arch-shaped retaining wall and the landscape stone bodies, a planting groove is fixedly formed in the top face of the arch-shaped retaining wall, and a planting groove is formed in the top face of the planting groove. The stabilizing assembly comprises first anchoring ribs and second anchoring ribs, the first anchoring ribs are arranged on the two sides of the arched retaining wall, the second anchoring ribs are fixedly installed on one side of the landscape stone body, the first anchoring ribs and the second anchoring ribs are connected through anchoring binding, and connecting ribs are fixedly connected between the first anchoring ribs. According to the utility model, through the combination of the landscape stone body and the arched retaining wall, the soil retaining performance of the device is embodied, the ornamental performance of the device is also enhanced, and the stability of the arched retaining wall can be improved through the anchoring connection of the first anchoring rib and the second anchoring rib in the stabilizing assembly.

The utility model relates to the technical field of tires, and provides a super high performance car tire, comprising: a carcass; a plurality of longitudinal main drainage grooves are arranged on the tread of the carcass; the inner side of the tread of the carcass has an inner tread pattern area, and the outer side has an outer tread pattern area; a plurality of first auxiliary drainage grooves and a plurality of second auxiliary drainage grooves are alternately arranged on the inner tread pattern area; a knife groove is also arranged between adjacent first auxiliary drainage grooves and second auxiliary drainage grooves; a plurality of third auxiliary drainage grooves and a plurality of fourth auxiliary drainage grooves are alternately arranged on the outer tread pattern area. The utility model can improve the dry and wet grip and drainage performance, reduce the risk of hydroplaning, and improve the wet driving safety and driving comfort.

The subgrade anti-settlement structure is characterized in that a lower drainage layer has water resistance and is stacked on a cushion layer, and a lower geotechnical grid is arranged on the lower drainage layer; and the upper drainage layer is arranged on the lower geotechnical grid. The structural strip is embedded in the middle of the first rubber strip in the thickness direction and arranged in the width direction of the first rubber strip. According to the roadbed anti-settlement structure provided by the utility model, the strength of the first adhesive tape in the width direction is enhanced through the structural strips, and the structural strength of each grid in the lower geotechnical grids can be enhanced. By means of the lower geotechnical grid with the reinforced structure, the whole strength of the upper drainage layer is guaranteed, meanwhile, the toughness of each grid in the lower geotechnical grid is improved, and the possibility that the upper drainage layer is abnormal in structure is lowered. Reinforcement is achieved through compounding of the upper geotechnical grid, and the structural strength of the pavement layer is improved. Meanwhile, the structural stability of the upper drainage layer is improved, and the sedimentation possibility is reduced.

The utility model discloses a small turning plough with a leveling function, and belongs to the technical field of small turning ploughs. Comprising a rack, a soil crushing assembly, a leveling assembly and a plowing assembly are arranged below the rack, the leveling assembly is located between the soil crushing assembly and the plowing assembly, the plowing assembly comprises a third mounting frame, a plowing shaft is arranged in the third mounting frame, and the two ends of the plowing shaft are connected with the third mounting frame through bearings; coulters are arranged on the outer wall of the plowing shaft and are uniformly distributed in the circumferential direction of the plowing shaft in a herringbone shape. According to the small turning plough with the leveling function, by arranging the turning assembly and the herringbone coulter, bidirectional soil turning and loosening and soil cutting and turning can be achieved, so that the soil structure is effectively broken, the soil hardening problem can be avoided, the air permeability and drainage performance of soil are improved, the rotation direction of the turning shaft interacts with the soil structure, and the leveling effect is improved. Therefore, the loosening effect of soil is enhanced, and the tillage depth and quality are improved.

This invention relates to the field of drainage flow data processing technology, specifically to an intelligent control method and system for drainage efficiency based on drainage flow monitoring data. The invention comprises a sampled data sequence and a predicted data sequence; it obtains multiple data segment groups from the sampled data sequence and the predicted data sequence based on the volatility of the data in the sampled data sequence; it obtains the prediction deviation of each data segment group based on the difference distribution characteristics and relative distance between the two data sequences in each data segment group; it obtains the relative prediction deviation difference at real time based on the difference between the prediction deviation of the data segment group at the real time and the prediction deviation of other data segment groups within the historical range; it obtains the weighted prediction data for the next time step; it further obtains the predicted gate opening degree; and it controls the drainage gate. This invention optimizes the gate opening degree and improves drainage efficiency by obtaining accurate drainage flow prediction data for the next time step.

The utility model relates to a tubeless all-steel truck radial tire tread pattern structure which comprises a tire tread, and further comprises longitudinal straight groove patterns which are respectively and uniformly distributed from a central line to two sides in the circumferential direction of the tire tread and comprise a first longitudinal straight groove pattern and a second longitudinal straight groove pattern; the transverse inclined grooves are connected between the adjacent longitudinal straight groove patterns and comprise first transverse inclined straight grooves connected with the adjacent first longitudinal straight groove patterns, second transverse inclined straight grooves connected with the adjacent first longitudinal straight groove patterns and second longitudinal straight groove patterns, and Z-shaped transverse inclined grooves; the inclination direction of the first transverse inclined straight groove is opposite to that of the second transverse inclined straight groove, and the inclination direction of the second transverse inclined straight groove is consistent with that of the Z-shaped transverse inclined groove. Compared with the prior art, the utility model can effectively solve the problems of blockage of broken stones or foreign matters and low drainage efficiency, and has good guidance quality, drainage performance, road holding force, sideslip resistance and multi-road-condition adaptability under the condition of high-speed driving.

The utility model relates to the technical field of foundation pit drainage, and disclose a kind of foundation pit side wall drainage structure, including drain pipe, the reinforcing mechanism is fixedly installed in drain pipe side face, the filter replacement mechanism is arranged in drain pipe inside;The filter replacement mechanism includes installation sleeve, the limit ring is fixedly installed in installation sleeve side face.When the drainage structure is blocked and needs to be cleaned, first open the buckle, further open the cover plate, then hold the handle tightly, and pull up, drive the mounting plate and the installation sleeve to rise, the limit ring and the positioning ring are separated from the positioning groove at this time, and drive the filter plate installed on the inner wall of the installation sleeve to rise, remove the magazines accumulated between the installation sleeve and the filter plate, after cleaning is completed, hold the handle tightly and align the limit ring and the positioning ring with the limit slot, and make the three mesh, then installation can be completed, at this time, close the cover plate, can effectively improve the efficiency of cleaning the impurities inside the drain pipe.

This utility model relates to the field of roof waterproofing technology, providing a roof waterproofing and insulation structure, including a roof and an insulation layer. Eaves gutters are provided along the edges of the roof. The insulation layer covers the roof, and a first drainage channel and a second drainage channel are provided on one side of the insulation layer facing the roof. The extension directions of the first and second drainage channels intersect, and both are connected to the eaves gutters. By providing the first and second drainage channels at the bottom of the insulation layer, accumulated water within the insulation layer can be drained from the first and second drainage channels to the eaves gutters for centralized drainage. This eliminates the need for drainage pipes on the roof, ensuring a continuous waterproof layer and preventing damage to the roof waterproofing. The intersecting extension directions of the first and second drainage channels enable multi-angle drainage, improving drainage efficiency and effectively preventing water accumulation in the insulation layer from reducing its thermal insulation efficiency.

The utility model discloses a side slope photovoltaic foundation device for the sunny side of a road. The side slope photovoltaic foundation device comprises a prefabricated foundation anti-skid bottom plate, a road anti-collision pier arranged on one side edge of the prefabricated foundation anti-skid bottom plate and a plurality of photovoltaic foundation prefabricated piers which are arranged on the prefabricated foundation anti-skid bottom plate and form a square matrix. The prefabricated foundation anti-skid bottom plate, the highway anti-collision pier and the photovoltaic foundation prefabricated pier are of a prefabricated integrally-formed structure and are used for being constructed and installed in the same period with a side slope of a highway. The top end of each photovoltaic foundation prefabricated pier is provided with an assembly pressing block, and the assembly pressing blocks are connected to the photovoltaic foundation prefabricated piers through assembly pressing block embedded parts. The assembly pressing block is used for fixing the photovoltaic panel assembly. Drain holes are reserved in the road anti-collision pier and the photovoltaic foundation prefabricated pier respectively. A cable channel reserved hole is reserved in the upper portion of the photovoltaic foundation prefabricated pier. According to the slope photovoltaic foundation device for the sunny side of the highway, a prefabricated integrally-formed structure is adopted, the structure is stable and durable, meanwhile, a roadbed can be prevented from being damaged, and the sideslip risk of slope operation can also be avoided.

The present invention discloses a heat exchanger and an air conditioning system having same. The heat exchanger comprises a first heat exchanger core and a second heat exchanger core, the first heat exchanger core comprising first heat exchange tubes and first fins, and the second heat exchanger core comprising second heat exchange tubes and second fins. The angle between the first heat exchanger core and the second heat exchanger core is α, the length of the first heat exchange tube is TL, the refrigerant circulation area of the first heat exchange tube is S, the width of the first fin is FW, the density of the first fin is FP, the height of the first fin is FH, the width of the first heat exchanger core is ML, the length of the second heat exchange tube is tl, the refrigerant circulation area of the second heat exchange tube is s, the width of the second fin is fw, the density of the second fin is fp, the height of the second fin is fh, the width of the second heat exchanger core is ml, and 0.016 ≤ (TL × ML × FW × FP × FH × s × cos α) / (tl × ml × fw × fp × fh × S) < 64. In this way, the water drainage performance of the heat exchanger is improved, and the problem of water being blown from the heat exchanger is solved.

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

This utility model discloses a drain assembly and sink structure, relating to the field of sink technology. The drain assembly includes a shell and an inner tank. The shell has a drain outlet for connecting to a drain pipe assembly. The inner tank is at least partially disposed within the shell. It also includes a filter element with an installation port corresponding to the drain outlet. The filter element is detachably connected to the inner tank and / or the shell, and is configured to at least partially cover the installation port. This drain assembly and sink structure allows for easier cleaning of the drain outlet due to the detachable filter element within the inner tank.

The utility model discloses a kind of sponge city efficient permeation greenbelt planting structures, it includes: green grass layer, artificial backfill nutrient soil layer, non-woven geotextile, water-accumulating layer and original soil layer, water-accumulating layer, non-woven geotextile, artificial backfill nutrient soil layer and green grass layer are sequentially laid from bottom to top in the upper of original soil layer, first drainage pipeline is provided in original soil layer, a plurality of rootlet pipes are provided on first drainage pipeline, a plurality of rootlet pipes are arranged along the direction of first drainage pipeline, one end of rootlet pipe extends into water-accumulating layer, a plurality of first through holes are provided on rootlet pipe, overflow pipe is provided on first drainage pipeline, overflow pipe extends to green grass layer upwards, overflow hole is provided on first drainage pipeline, overflow hole bottom is connected with second drainage pipeline, second drainage pipeline is connected with water-collecting well, and sealing assembly is provided at overflow hole. The utility model can solve the problem of poor permeability of urban green space compared with prior art.

The application relates to the field of shoes, and provides an antibacterial indoor shoe, which comprises a shoe sole, a pad layer, a plurality of water passing cavities are arranged in the shoe sole, and a plurality of water passing holes are arranged in the pad layer. The application has the effect of accelerating the drying speed of the indoor shoe.

The invention relates to a method for preparing a hierarchical porous catalyst layer of a high-drainage porous membrane electrode based on micro-nano bubbles, which comprises the following steps of: generating oxygen bubbles under the catalysis of carbon-loaded platinum by taking hydrogen peroxide as a bubble source, and constructing the high-drainage porous membrane electrode by taking the micro-nano bubbles as a template; the specific method comprises the following steps: dissolving a carbon-supported platinum catalyst PtC and a Nafion solution in ethanol and water to obtain a solution, carrying out ultrasonic treatment on the solution, dropwise coating the solution on carbon paper at 80 DEG C, and dropwise adding a hydrogen peroxide solution in the coating process; and drying in a vacuum freeze drying box after air drying. According to the invention, the membrane electrode with high porosity is constructed, so that liquid water is effectively prevented from blocking pores, and the phenomenon of water logging in the battery is relieved. According to the preparation method, shrinkage and agglomeration of catalyst particles are avoided, and the hierarchical porous catalyst layer of the porous membrane electrode with high drainage performance is obtained. The invention also provides application of the porous membrane electrode in the field of fuel cells.

The utility model discloses a cultivation pot for facility greenhouse strawberry production uses, including the pot body, the material quality of pot body is food -grade PP material quality, the inside fixed mounting of pot body has the draining plate, and the draining plate divides the cultivation layer and the drainage layer in the pot body, and the inner wall bottom of pot body is provided with the drainage and ventilation structure, and the drainage and ventilation structure is located the drainage layer surface, and the drainage and ventilation structure includes the drainage pipe for discharging the excess water, and the port threaded connection of drainage pipe has the sealed soft plug, and sealed soft plug and drainage pipe detachable mounting. This cultivation pot for facility greenhouse strawberry production uses, the pot body of food -grade PP material quality can guarantee the cultivation process, and the safety performance is promoted, and the pot body is divided into two parts through the draining plate, so as to carry out the layered operation to the planting soil and the excess water of irrigation, and when carrying out the drainage operation, just need to pull out sealed soft plug to carry out the drainage operation, and the drainage performance of pot body is greatly improved, so that the pot body keeps the ventilation state and uses.

The utility model belongs to underground engineering construction technical field, concretely relates to a basement multiple water collecting unit's pressure equalizing safety system. Water collecting unit includes water collecting well, filter well and horizontal water guide pipe, water collecting well sets up in concrete protective layer, and correspondingly is arranged with recessed portion, filter well sets up in the soil below concrete cushion, and correspondingly is arranged with horizontal portion, the top opening of filter well is adjacent with the concrete cushion below the horizontal portion of concrete bottom plate, water collecting well is located in one side of filter well, and is linked through horizontal water guide pipe, the bottom wall of water collecting well is lower than the bottom wall of filter well, water collecting unit is provided with a plurality of two two distance, and the filter well of two adjacent water collecting units is linked through horizontal setting water -permeable blind pipe, and the horizontal water guide pipe of two adjacent groups of water collecting units is linked through horizontal setting circulation pressure equalizing common pipe. Avoid one or more water collecting units failure when causing anti -floating accident.

The utility model provides a shuttle vehicle, and relates to the technical field of shuttle vehicles. The electrical assembly is arranged on one side of the chassis; the protective cover assembly and the electrical assembly are located on the same side of the chassis and cover the electrical assembly. And the first screw penetrates through the chassis, the electrical assembly and the protective cover assembly and fixes the protective cover assembly on the chassis. According to the shuttle vehicle, the protective cover assembly does not need to be fixed independently, so that the shuttle vehicle does not need to be redesigned, whether the protective cover assembly is installed or not is determined according to an actual scene, the waterproof capacity of the shuttle vehicle is improved, and when the working environment of the shuttle vehicle is changed, simple transformation can be conducted to adapt to the corresponding environment, and the service life of the shuttle vehicle is prolonged. Therefore, production cost is reduced, and production efficiency is improved.

The utility model discloses an automatic cleaning intercepting ditch device which comprises a ditch main body, a grate arranged at the top of the ditch main body and a detachable filter screen arranged at the top in the ditch main body, drainage holes are formed in the two sides of the bottom of the ditch main body respectively, and the two drainage holes are located in the two sides of a road respectively. The inner bottom of the ditch main body is provided with a conveyor belt consistent with the span direction of the two drainage holes, and scraper blades are arranged on the conveyor belt at intervals; a driving mechanism used for driving the conveying belt to operate is arranged in the ditch body, and a power source of the driving mechanism is provided by water flow in the ditch body. The water flow power is effectively utilized, sundries and silt in the intercepting ditch can be automatically and continuously cleaned, the manual maintenance cost is greatly reduced, the drainage performance of the intercepting ditch is remarkably improved, the service life of the intercepting ditch is remarkably prolonged, and pollution and influence on the ecological environment are reduced to a certain extent.

The utility model relates to the technical field of tunnel construction, in particular to a tunnel lining waterproof and drainage structure which comprises a tunnel surrounding rock, a main drainage pipe located at the bottom of the tunnel surrounding rock and a ground drainage module used for ground drainage, and a primary support layer, a waterproof plate layer, a waterproof spraying layer and a secondary lining layer are sequentially arranged from outside to inside from the tunnel surrounding rock. An outer drainage layer used for draining water between the primary supporting layer and the waterproof plate layer is arranged between the primary supporting layer and the waterproof plate layer, and a drainage plate used for draining water between the waterproof spraying layer and the secondary lining layer is arranged between the waterproof spraying layer and the secondary lining layer. The drainage plate receives water drained by the outer drainage layer; through the arrangement of double-layer drainage, leakage holes are prevented from being punched in the primary supporting layer, the supporting effect of the primary supporting layer is guaranteed, and through the arrangement of multiple pipes, the overall drainage effect is improved.

The utility model discloses a water seepage prevention structure which comprises a rock soil slope body, a drainage channel and a drainage ditch, the drainage channel is installed at the bottom of the rock soil slope body, a supporting wall is installed above the drainage channel, a bottom plate is poured on the slope of the rock soil slope body, a first filter screen is arranged above the bottom plate, and a second filter screen is arranged above the first filter screen. A drainage cavity is formed between the first filter screen and the bottom plate, first supporting blocks are evenly fixed to the lower portion of the first filter screen, soil separation gauze is laid on the outer surface of the first filter screen, a stone filling area is arranged on the outer side of the soil separation gauze, and a soil layer is arranged on the outer side of the stone filling area. According to the water seepage prevention structure, the dirt separation net plate flush with the drainage ditch is arranged at the top of the drainage ditch, leaves and weeds can be effectively prevented from entering the drainage ditch, the phenomenon that a drainage pipe communicated with the drainage ditch is blocked can be avoided in cooperation with use of a second filter net in the drainage ditch, and the drainage effect of the device is improved.

The utility model relates to the technical field of underpass diversion trenches, and discloses a self-cleaning urban road water underpass diversion trench structure, which comprises a diversion trench, the inner wall of the diversion trench is rotatably connected with a rotating column, the other end of the rotating column is rotatably connected with the diversion trench through an auxiliary rod, the outer wall of the rotating column is fixedly connected with a spiral blade, and the spiral blade is fixedly connected with the diversion trench. The outer wall of the spiral blade is fixedly connected with a plurality of blade plates, the inner wall of the flow guide groove is fixedly connected with a semicircular plate, the outer wall of the flow guide groove is communicated with a first pipeline, the other end of the first pipeline is communicated with a collecting box, the other end of the collecting box is communicated with a second pipeline, and the other end of the second pipeline is communicated with the outer wall of the flow guide groove. According to the device, water flow impacts the auxiliary rod on the surface of the spiral blade, so that the spiral blade continuously rotates, the spiral blade continuously rotates to convey garbage on the inner wall of the semicircular plate to the right end of the flow guide groove, the garbage enters the collection box, and automatic collection of water garbage is achieved.

This utility model relates to the field of municipal inspection and maintenance technology, and discloses a manhole cover structure for inspection wells, including a main body, a manhole base, and an adjustable manhole cover module. The adjustable manhole cover module includes: a manhole cover body disposed at the inner top of the manhole base; a threaded rod uniformly fixedly installed on the outer surface of the manhole cover body; a reinforcing plate uniformly fixedly installed on the outer surface of the manhole base; a limiting rod penetrating the edge of the top of the manhole base, with one side extending into the interior of the manhole cover body; and limiting holes, with at least twenty-four limiting holes, one side of the limiting rod extending into the interior of one of the limiting holes. By incorporating the adjustable manhole cover module, the problems of traditional manhole covers being unable to adapt to height changes after road surface elevation, prone to loosening and displacement, and requiring complex and inefficient replacement are solved.

The utility model discloses a drainage structure and air conditioner relates to the technical field of air conditioner, wherein, drainage structure includes front shell and rear shell, the top of front shell is equipped with first drainage groove, the rear shell is connected in the front shell, the top of rear shell is equipped with second drainage groove, and first drainage groove with second drainage groove is linked together, be equipped with water storage tank on the front shell and / or the rear shell, water storage tank with first drainage groove and / or second drainage groove is linked together, and the tank wall of water storage tank is equipped with drain hole, and the water in water storage tank is discharged outside through drain hole, the utility model provides technical scheme to improve the drainage capacity of drainage structure, improves the security of air conditioner.

The utility model discloses a floor drain for a construction site, which relates to the technical field of floor drains and comprises a floor drain body for draining water, a fixing mechanism is mounted at the center of the upper surface of the floor drain body in a penetrating manner, an anti-blocking mechanism matched with the floor drain body is mounted at the top end of the fixing mechanism, and the floor drain body comprises a top plate. The floor drain comprises a floor drain body, a top plate is arranged below the floor drain body, an annular plate is arranged below the top plate, a plurality of supporting plates are fixedly connected to the upper surface of the annular plate in an annular array mode, and the top ends of the supporting plates are fixedly connected with the upper surface of the top plate. The anti-blocking mechanism is located outside, so that blocked garbage can be conveniently cleaned, the positions of the floor drain body and the anti-blocking mechanism can be conveniently adjusted through the arranged fixing mechanism, and the floor drain can conveniently adapt to different use environments.

The application relates to the technical field of energy storage containers, and discloses a box bottom structure and an energy storage container. The box bottom structure comprises a plurality of crossbeams and a water guide. The plurality of crossbeams are arranged at intervals along a first direction, a bottom plate is arranged between two adjacent crossbeams, and a groove is arranged on at least one end of each crossbeam along a second direction. The water guide extends along the first direction and sequentially passes through the plurality of grooves, and a drainage groove is arranged on the water guide. According to the application, the groove is arranged on the end of each crossbeam, and the water guide sequentially passes through the plurality of grooves, so that the crossbeams do not hinder the drainage groove, the water guide forms an uninterrupted drainage groove in the first direction, and the liquid water in the container can be conveniently drained. In addition, the bottom plate does not need to be perforated, the structural strength of the bottom plate is maintained, and the bearing capacity of the bottom plate is improved.

The application relates to the technical field of road engineering, in particular to a setting method of a highway super-high gentle section drainage system based on a longest water collection path, which comprises the following steps: field investigation; simplifying the maximum water collection path into a plane quadratic curve, taking a point where the maximum water collection path enters a water accumulation area as an original point O, taking the road center line direction of the O point as an X axis, and taking the vertical road center line direction as a Y axis to establish a plane coordinate system; determining the position of a starting point A point of the maximum water collection path; deriving a quadratic curve of the maximum water collection path according to the A point, the O point coordinates and the derivative of the maximum water collection path curve at the O point; and determining the setting angle of the water interception groove at different positions according to the longest water collection path to determine the number of water interception grooves. According to the application, the water interception groove position is determined according to the longest water collection path, the water interception groove angle is 90 DEG intersected with the maximum water collection path, water flow is collected to the maximum extent, water flow collection in the gentle section is blocked, and water accumulation is reduced.

This utility model discloses a foundation pit drainage device for building construction, comprising: a deep foundation pit; a foundation pit pumping assembly mounted on the deep foundation pit, the foundation pit pumping assembly being used for pumping and draining water; and a sludge preliminary sedimentation and removal assembly mounted on one side of the foundation pit pumping assembly. The device performs secondary deep filtration of the water through a second filter plate to further remove residual impurities. A water level detector monitors the water level in real time to ensure stable filtration. The filtered water is discharged into a drainage ditch via a drainage pipe through a pump. If sludge is generated during filtration, a second sludge suction pipe transports it to a sludge pump for discharge. The advantages of this device are that the secondary filtration assembly further improves water quality, reduces impurities from clogging the drainage system, and improves drainage efficiency and quality. Simultaneously, the water level detector enables automated monitoring, improves the system's intelligence level, reduces manual intervention, and further optimizes the drainage effect.

The utility model provides a kind of heat exchanger and heating and ventilation equipment, heat exchanger includes multiple first fin units, multiple second fin units and multiple heat exchange tube assemblies, heat exchange tube assembly includes first heat exchange tube and second heat exchange tube, the flow area of first heat exchange tube is greater than the flow area of second heat exchange tube. Condensate produced when heat exchanger works can be discharged through the windward part of first fin unit and the leeward part of second fin unit, improve the drainage performance of heat exchanger. The first fin unit of larger heat load and more condensate generation located windward side is installed with the first heat exchange tube of larger flow area, the second fin unit of smaller heat load and less condensate generation located leeward part is installed with the second heat exchange tube of smaller flow area, so that the structure design of fin assembly is optimized by zoning in combination with temperature distribution and heat exchange characteristics of air side, so that the distribution of heat exchange tube is matched with temperature field and heat exchange characteristics, reduce the redundancy of fin, improve the efficiency and utilization of overall fin.