61results about How to "Drain fast" patented technology

This application discloses a marine generator winding protection device, belonging to the technical field of generator protection devices. The protection device includes a base and a generator installed on the base. A fixing frame is provided at the lower end of the base, a lower housing is provided at the upper end of the fixing frame, and an upper housing is provided at the upper end of the lower housing. A moisture-proof mechanism is provided inside the upper housing, and a partition frame is installed inside the upper housing. Several condensation plates are evenly distributed at the upper end of the partition frame. The condensation plates are fixed to the partition frame by a support base. A guide duct runs through the partition frame. External air enters from the air inlet pipe. When it flows through the guide duct, the humid air comes into contact with the condensation plates and condenses. The water vapor is discharged along the guide groove. Dry air circulates through the exhaust pipe. The condensation plates condense water vapor through refrigeration or temperature difference effect. The guide groove drains water quickly, and the desiccant in the storage tank adsorbs residual water vapor, forming a triple protection of condensation-drainage-drying, which effectively reduces the humidity in the generator room.

The invention provides a construction method of a prefabricated assembled roadbed structure of a new and old expressway, which comprises the following steps: S1, carrying out stepped excavation on an old roadbed splicing area, and connecting a plurality of first splicing units with an old roadbed through a longitudinal insertion structure; s2, the first splicing units and the second splicing units are connected through first bolt connecting sets, and the second splicing units are connected through transverse inserting structures; s3, the adjacent first splicing units and the connected second splicing units are connected through second bolt connecting sets; s4, the first splicing unit and the second splicing unit are each connected with a leveling assembly used for adjusting the elevation and levelness of the first splicing unit and the second splicing unit; s5, sealing pieces are arranged between the first splicing units, between the first splicing units and the second splicing units and between the second splicing units; and S6, cast-in-place structures are arranged at the joints of all the splicing structures, the site cast-in-place workload is reduced, and rapid splicing of the new roadbed and the old roadbed is achieved.

This utility model discloses a collagen mask soaking device, relating to the field of mask soaking technology. It includes a soaking box with fixed plates fixedly connected to both sides. Limit grooves are formed on the inner surfaces of both sides of the fixed plates. A servo motor is detachably connected to the bottom of one fixed plate, and a threaded rod is detachably connected to the output shaft of the servo motor. A guide rod is fixedly connected inside the other fixed plate. A U-shaped lifting frame is installed on the threaded rod and the guide rod. Two limit blocks are fixedly connected to both sides of the U-shaped lifting frame. Two columns are symmetrically fixedly connected to the lower end of the U-shaped lifting frame, and a reinforcing rib is fixedly connected to one side of each column. This collagen mask soaking device uses a servo motor to drive the lifting frame to rise and fall, improving soaking uniformity and efficiency. A circular groove positions the mask, and a drain hole cooperates with a drain plate to drain the liquid. The cover plate snap-fit ​​structure facilitates installation and removal, ensuring the mask does not shift.

The utility model discloses a kind of anti-falling board auxiliary jig structures for small size PCB production, it is related to auxiliary jig technical field, and it includes: substrate bearing plate, multiple support platforms and multiple drainage open area are equipped on the substrate bearing plate, the end of the support platform is provided with clamping point, the lower side notch of the drainage open area extends to the bottom surface of substrate bearing plate, the upper side four corners of the substrate bearing plate are all installed with support seat, adjusting screw is screwed through in the support seat, the inner end of the adjusting screw is rotatably connected with clamping piece, gauze is laid on the substrate bearing plate, and the four corners of the gauze are connected with four clamping pieces respectively. The utility model is cooperatively designed by gauze and drainage open area, and gauze tension offsets water flow impact force, prevents PCB board displacement, and drainage open area accelerates liquid discharge, compared with traditional single anti-falling board structure, reduces the downtime of cleaning process.

This invention discloses a permeable high-strength sidewalk paving slab based on coal gangue. The paving slab is made from the following raw materials in parts by weight: 80-95 parts coal gangue aggregate and 5-20 parts polyurethane adhesive. The particle size of the coal gangue aggregate is 5mm-20mm, of which the weight percentage of particles smaller than 10mm is 30%-50%. Furthermore, this invention also discloses a method for preparing the sidewalk paving slab, which involves crushing, screening, washing, and drying the coal gangue, then loading it into a mold, vibrating to compact it, spraying with polyurethane adhesive, curing at room temperature, and then demolding. The coal gangue-based permeable high-strength sidewalk paving slab of this invention requires no sintering, has a simple process, is low-carbon and environmentally friendly, has a compressive strength of not less than 30MPa, a flexural strength of not less than 5MPa, and a porosity of 15%-25%. It combines high strength and high permeability, can absorb large quantities of coal gangue solid waste, and is suitable for municipal roads, squares, and landscape paving, offering good economic and environmental benefits.

The utility model relates to the technical field of glass bottle forming, in particular to an improved glass bottle forming device. According to the technical scheme, the device comprises a base, a bottom die is fixedly installed in the middle of the upper surface of the base, side plates are symmetrically and fixedly installed on the two sides of the upper surface of the base, hydraulic cylinders are fixedly installed on the outer sides of the two side plates, and the output ends of the two hydraulic cylinders are fixedly connected with movable plates; the inner sides of the two moving plates are fixedly provided with section molds, the positions, close to the two ends, of the outer sides of the two moving plates are fixedly provided with sliding sleeves, two sliding rods are fixedly connected between the inner sides of the two side plates, the sliding sleeves are slidably connected to the outer surfaces of the sliding rods in a sleeving mode, and the middle positions of the outer surfaces of the two sliding rods are fixedly connected with sleeves in a sleeving mode. According to the glass bottle forming mold, contact impact of the mold can be avoided in the mold closing process of the glass bottle forming mold, so that the mold is prevented from being damaged, and meanwhile, the mold after mold closing is positioned.

The invention relates to the technical field of fiber spinning machines, and provides a special fiber spinning machine which comprises a fiber liquid pump station, a pipeline component, a gel tank assembly and a lifting assembly. The fiber liquid pump station is communicated with the gel tank assembly through a pipeline part, the transmission end of the lifting assembly is arranged at the top end of the gel tank assembly, the lifting assembly comprises a yarn separating shuttle, and the yarn separating shuttle extends into the gel tank assembly; the lifting assembly drives the filament separating shuttle to move up and down to adjust the filament bundle dipping time. The technical problem that in the prior art, the tow dipping bath time and the exposure time in air are inconvenient to adjust is solved, and the adjusting efficiency of the tow dipping bath time and the exposure time is improved.

The utility model relates to the field of footwear manufacturing technology discloses a kind of EVA shoe sole with openwork type support framework structure, including EVA shoe sole main body, the inside of EVA shoe sole main body is provided with inner cavity, and the inside of inner cavity is provided with inner support, the inside of inner support is provided with cavity The utility model is provided with EVA shoe sole main body, inner support, cavity, support block, inner cavity, limiting band, wear slot, connection thorn face one, connection hair face one, connection thorn face two and connection hair face two, when using after shoe sole assembly, by using inside inner support, the inside of shoe sole can be supported, palm and heel position are respectively used entity support to ensure shoe sole support effect, middle position uses hollow structure to ensure certain softness, improve wearing foot feeling, simultaneously through replaceable setting, when inside inner support support softness is insufficient, can be replaced alone inside framework support, long-acting support is used to the inside of shoe sole, reduce cost.

The utility model discloses a kind of fluorite powder cloth bag dust collectors, including smoke pipe, the left end of the smoke pipe is fixedly connected with the smoke outlet of dryer, the right end of the smoke pipe is provided with filter cloth, the edge of the filter cloth is fixedly connected with the inner wall of connecting ring, the connecting ring is connected with the right end of smoke pipe by multiple screws, the smoke pipe is obliquely arranged, the right end of the smoke pipe is higher than the left end of the smoke pipe, drainage mechanism is installed in the smoke pipe, the utility model contains fluorine ion water, accumulates in the bottom of smoke pipe, and the sealing plug of drain pipe is pushed away using the gravity of water, so that the water containing fluorine ion is quickly drained, corrosion is prevented, and after stopping drying operation, the sealing plug can be reversely moved and reset, so that the problem that fluorine ion-containing water vapor is attached to the inner wall of dust collector, equipment is easily corroded to cause equipment damage and affect production is effectively solved.

The utility model discloses a small -size automatic dehydrator, including frame, the dehydration shell of being fixed on the frame, be provided with dehydration cylinder in the dehydration shell, the upper portion fixed with drive motor in the dehydration shell, and drive motor is connected with the dehydration cylinder through transmission tooth area, the top of dehydration shell is fixed with the feeding hopper, and the outer wall on the dehydration shell is fixed with control box, is provided with operating panel on control box, the bottom of dehydration shell is fixed with the drain, and the bottom of dehydration shell still is provided with the discharge gate that links together with the dehydration cylinder, is provided with control door at the discharge gate, and there is controller between control door and the dehydration shell. The utility model discloses the structure is reasonably set, has the feeding hopper, and the disposable placement of material is convenient, and there is the drain in the bottom of the dehydration shell, is favorable to the rapid drainage, has the control door, can open control door after completing dehydration, and the material is removed from the bottom, improves the convenience and effectiveness of dehydration entry and unloading, is favorable to improving the efficiency of dehydration.

The utility model discloses an electroplating cleaning device, which comprises a cleaning pool group, an electroplating pool group and an electroplating pool group, the carrying mechanism is arranged on one side of the cleaning pool set and used for carrying the jig frame so that the jig frame can be soaked into the cleaning pool body; the water supply system is arranged on one side of the cleaning pool set and provides clean water for the cleaning pool body; the water quality monitoring unit is arranged in the cleaning pool body, and the water supply system is controlled by the water quality monitoring unit to supply clean water to the cleaning pool body; the water flow circulation control system is arranged between the cleaning pool bodies and is connected with a drainage pipe. And a mixing structure is arranged in the cleaning pool body. The water supply system moves along the cleaning pool set and provides clean water for the corresponding cleaning pool bodies. And a liquid level sensor is arranged in the cleaning pool body. The multiple cleaning pool bodies are sequentially arranged in a stepped mode, so that water in the previous cleaning pool body enters the next cleaning pool body. The method has the remarkable advantages of improving the cleaning effect, accurately controlling the water quality, flexibly managing the water flow, saving energy, protecting the environment and the like.

The test tube drying device for gene detection comprises a drying cylinder, a servo motor is mounted on the lower surface of the drying cylinder, a driving disc is mounted at the output end of the servo motor, a purging ring is fixedly connected to the edge of the driving disc, a sealing ring is mounted at an opening of the purging ring, and a sealing ring is mounted at the opening of the sealing ring. And the closed ring is fixed on the inner wall of the drying cylinder. According to the test tube drying device for gene detection, a purging ring drives a purging rod and a test tube to conduct circular motion along the motion trail of the purging ring, meanwhile, a bevel gear on the purging rod can rotate under pushing of a driving ring and a bevel gear block, and therefore the purging rod rotates on the purging ring; the purging rod drives the water absorption bristles to wipe excessive water in the test tube, and finally, external hot air can be poured into the purging ring through equipment and the air supply pipe, then is poured into the hollow purging rod, and finally is blown into the test tube through the air holes to quickly air-dry the test tube.

The utility model discloses a light sunshade rain shelter, relate to building sunshade rain facility technical field, aim at solving the sunshade rain demand of toll station etc. scene. Include: concrete foundation, its inside pre -buried foundation bolt, stand column subassembly, through the column foot and the detachable connection of concrete foundation's foundation bolt, crossbeam subassembly, horizontal connection between adjacent stand column subassembly, shading screen, lay on crossbeam subassembly and stand column subassembly, form the grid structure by the metal wire interlaced weaving, the utility model discloses can effectively block rainwater and sunlight, still can cover bionic green layer as needed and promote the aesthetic degree, overall structure is light, and the installation is convenient, is applicable to toll station etc. place.

The utility model discloses a collecting net for a high-voltage electrostatic air purifier. The collecting net comprises a frame, a plurality of oval metal sheets and conducting strips. Wherein the frame comprises a hollow frame body defined by side styles, and a plurality of clamping grooves which are evenly arranged and open towards the back face of the frame are formed in the inner walls of the opposite sides of the hollow frame body; each elliptical metal sheet is an elliptical cylinder with a cavity inside; the plurality of oval metal sheets are arranged in parallel at preset intervals, and the two ends of each oval metal sheet are clamped into the clamping grooves respectively; and the conducting strip is arranged in the inner cavity of the hollow frame body and is used for being in contact conduction with each elliptical metal sheet. According to the technical scheme, the structure is simple, assembly and maintenance are convenient, the air volume of ion wind can be increased by more than 50%, and the service life of the metal wire emitting the ion wind can be protected by more than 25%.

This utility model discloses a biomimetic breathable flowerpot, relating to the field of flowerpot technology. It includes a pot body with side walls and multiple circumferentially oriented air vents. A honeycomb biomimetic drain tray is located at the bottom of the pot body, with multiple honeycomb drain holes and honeycomb air guide holes on its sidewalls. A biomimetic base is located at the bottom of the honeycomb biomimetic drain tray, including a base side wall with multiple circumferentially oriented drainage holes. An air vent adjustment mechanism is located at the top of the biomimetic base and is fitted onto the outside of the honeycomb biomimetic drain tray. This utility model, by incorporating a honeycomb biomimetic drain tray, achieves both rapid drainage and efficient air permeability while maintaining structural stability. The hexagonal honeycomb structure of the honeycomb possesses the characteristics of "high strength, lightweight, and porosity," resulting in good uniformity of airflow within the pot, increased air permeability, and significantly improved drainage speed.

This utility model relates to the field of nut technology and discloses an integrated washer nut, comprising a main body with a threaded groove inside. A protective component is installed on the top of the main body, and a connecting block is fixedly connected to the bottom of the main body. A washer is fixedly connected to the bottom of the connecting block, and a fastening component is provided inside the main body. The protective component includes two mounting blocks, which are slidably connected to the top of the main body. A protective block is fixedly connected to the top of the two mounting blocks. Two sliding grooves are formed on the top of the main body, and a locking groove is formed on one side of each sliding groove. A locking block is fixedly connected to one side of each mounting block. In this utility model, the cooperation structure of the sliding mounting blocks and locking blocks allows the protective block to be quickly installed and removed, forming a top sealing barrier that effectively prevents external dust and liquid from entering the threaded groove. Combined with a galvanized protective layer, the corrosion resistance of the nut is improved, and the service life of the nut is extended.

The utility model discloses a kind of UHPC cable manhole covers, including the cover plate body made of UHPC, multiple groups of reinforcement cage are pre-buried along length direction in the cover plate body inside, and reinforcement cage includes longitudinal main reinforcement and transverse distribution reinforcement;Anti-skid texture is equipped on the upper surface of cover plate body, and sealing groove is equipped on the side surface of four around, and rubber sealing strip is adaptively installed in sealing groove;Hoisting connecting part is equipped on the side surface of both ends of the short side of cover plate body;Reserved mark area is on the upper surface of cover plate body, multiple groups of reinforcing ribs are arranged along width direction in the cover plate body inside, and drainage groove is set up on the upper surface, the utility model uses UHPC material, compared with traditional concrete, high in strength, good in durability, under the premise of guaranteeing cover plate strength, cover plate thickness can be appropriately thinned, effectively reduce dead weight, after testing, the utility model cover plate body compared with same size ordinary concrete cover plate dead weight lightens 30%-40%, convenient to carry and install, reduce construction difficulty and labor intensity;Meanwhile, the high durability of UHPC makes cover plate long-term use under harsh environment, reduces maintenance replacement frequency, reduces whole life cycle cost.

The utility model discloses a diversion anti-backflow ship drainage structure, and relates to the technical field of ship drainage, the diversion anti-backflow ship drainage structure comprises a deck, one side of the deck is provided with a barrier plate, the lower part of the barrier plate is provided with a connecting pipe, the lower part of the connecting pipe is connected with a communicating pipe, and the communicating pipe is connected with a water inlet pipe. The device comprises a communicating pipe, one end of the communicating pipe is connected with a gathering pipe, the lower portion of the gathering pipe is provided with a backflow prevention assembly, the backflow prevention assembly comprises a cleaning bin and a turbofan, the cleaning bin is installed at the bottom end of the gathering pipe, and the inner wall of the cleaning bin is slidably connected with a filter plate. Impurities are intercepted in a layered mode through the screen and the filter plate, the pipeline blocking risk is reduced, and normal backflow prevention work is guaranteed. The turbofan drives the brush to automatically clean the filter plate, so that the manual maintenance frequency is reduced. Drainage depends on gravity in daily life, a pump is started to accelerate drainage under extreme working conditions, and energy consumption and efficiency are both considered.

This utility model discloses a trough-type drainage pipe fitting for bathrooms, including an adjustable plastic drainage trough, a trough connector, and a central drainage connector assembled together. The adjustable plastic drainage trough is a U-shaped trough structure with one open end, symmetrically arranged at both ends of the trough connector. The trough connector is a U-shaped open structure with side grooves on both sides, corresponding to the open ends of the adjustable plastic drainage trough. The bottom of the trough connector has a bottom groove with a through hole. The central drainage connector is located on the bottom groove of the trough connector. The central drainage connector is an integrally molded design, including a base plate and a drainage pipe that is connected to the base plate. The base plate is located in the bottom groove, and the drainage pipe passes through the through hole. This utility model drainage pipe fitting has the advantages of high drainage efficiency, easy installation, convenient maintenance, and adaptability to high-flow drainage scenarios, effectively improving the drainage process of bathroom shower rooms.

The application relates to the technical field of air conditioner cabinet control, and discloses an air conditioner cabinet control method, which comprises the following steps: acquiring state parameters of an air conditioner cabinet in real time, wherein the state parameters comprise operation parameters of multiple components of the air conditioner cabinet; performing environment prediction based on the state parameters, and determining an operation mode of the air conditioner cabinet based on the result of the environment prediction; determining fan basic parameters corresponding to the operation mode; performing linkage control on the operation parameters of the multiple components of the air conditioner cabinet based on the result of the environment prediction, the fan basic parameters and the state parameters; and continuously monitoring the state parameters acquired in real time, and taking corresponding processing measures when an abnormality is monitored. The application realizes the whole-process closed loop from prediction to decision-making, from linkage control to abnormality protection, effectively improves the comfort, reduces the energy consumption and enhances the operation safety.

This invention discloses an intelligent emergency drainage system for urban roads, belonging to the field of urban drainage system construction technology. This intelligent emergency drainage system includes a pipeline laying system installed within a comprehensive utility tunnel. The pipeline laying system comprises a pair of laying vehicles and a storage vehicle. The storage vehicle contains a pipe-winding fitting, on which a flexible hose is wound. Both ends of the flexible hose horizontally penetrate the pair of laying vehicles. Both the laying and storage vehicles have built-in power systems. The laying vehicles are equipped with connectors, including a cylindrical first connector and a second connector. The outer surface of the first connector has an annular groove, and the second connector contains a locking mechanism. The second connector is positioned at the outlet of the drainage pipe after water collection on the ground. The first connector is positioned on either laying vehicle. Through external intelligent control, the flexible hose is rapidly laid while automatically connecting to the drainage pipe. Intelligent control reduces human intervention and quickly drains water from flooded areas.

The application discloses a drainage tunnel maintenance stage people and vehicle anti-skid device and a mounting method, and relates to the technical field of water conservancy projects. The device comprises at least one anti-skid pad body and a side edge anchoring mechanism. The anti-skid pad body comprises an anti-skid wear-resistant layer, a buffer bearing layer and an anchoring and adhering layer. The lower surface of the anchoring and adhering layer is provided with an anchoring structure. The upper surface of the anti-skid wear-resistant layer is provided with anti-skid textures and a plurality of drainage grooves. The anti-skid textures are used for enhancing the friction coefficient of the upper surface of the anti-skid wear-resistant layer and can guide accumulated water to the drainage grooves. One end of the side edge anchoring mechanism is in abutment with the side wall of the drainage tunnel, and the other end is used for being connected with the side edge of the anti-skid pad body, so as to limit the displacement of the anti-skid pad body in the width direction of the bottom plate of the drainage tunnel and provide the anti-skid pad body with a compression force perpendicular to the bottom plate of the drainage tunnel. The application can realize the technical effects of multiple goals, such as large longitudinal slope anti-skid, efficient installation, environmental protection and pollution-free, and reusability.

The invention relates to the technical field of aquaculture, in particular to a weather-based self-adjustable liquid oxygen device for sturgeon culture, which comprises a culture box and a heating box arranged on the right side of the culture box and used for temporarily storing and heating water, and a conveying mechanism used for conveying water in the heating box into the culture box is mounted at the top of the heating box. A connecting pipe is fixedly connected between the heating box and the breeding box, and a check valve is mounted on the surface of the connecting pipe; when water in the stirring box is stirred and discharged every time, the positions and angles of the liquid oxygen pipe and the spray head can be adjusted at the same time, so that the situation that supplied oxygen is concentrated on one side is avoided, and it is guaranteed that oxygen can be supplied at different positions and different angles in the breeding box; when the liquid oxygen tank is replaced, liquid oxygen cannot be provided temporarily, water conveyed into the breeding box from the heating box can have enough oxygen content, and the situation that the breeding quality is affected due to the fact that the oxygen content is reduced is avoided.

The invention relates to an expansion tube type filter, in particular to an expansion tube type filter solid-liquid separation mechanism which comprises a fixed support, a barrel, a water inlet and a water outlet, the water inlet and the water outlet are formed in the two sides of the barrel, the expansion tube type filter solid-liquid separation mechanism further comprises a transmission assembly, and the transmission assembly is installed in the barrel. The transmission assembly connects the moving rod with the power-assisted plate through the linkage rotating shaft, the power-assisted plate is connected with the expansion membrane through the clockwork spring, the expansion membrane is stretched to form wrinkles within the rupture strength range under the limitation of the clockwork spring, the contact area of water to be treated and the expansion membrane is increased through the wrinkle structure, and the compression spring can generate elastic force to drive the expansion membrane to rebound. The reciprocating motion of the moving rod drives the sliding block to move, meanwhile, the rack and the gear are meshed and matched to control the opening size of the drainage pipe, when the water flow speed is too high, the expansion membrane forms wrinkles to increase the contact area with the water flow, and the opening of the drainage pipe is enlarged for drainage, so that the filtering effect of the filter is improved.

The utility model discloses a kind of artificial stone laundry tubs of convenient drainage, it is related to laundry tub technical field, including laundry tub, the laundry tub includes scrubbing part and cleaning part, the cleaning part includes the water storage tank integrally formed with the laundry tub, the inner groove bottom of the water storage tank is close to the corner of the water storage tank and is provided with drain hole in corner place, the remaining three corners in the water storage tank gradually drop height to the drain and form a gentle slope, and the drain hole is located in the lowest place. The inner groove bottom of the water storage tank forms the inclined gentle slope, and the drain hole is arranged in the corner place at the lowest place, when the clothes are placed in the water storage tank, since the drain hole is arranged in the corner place, it is not easy to be blocked by clothes, and the setting of gentle slope can drain liquid into the drain hole, which is beneficial to drainage operation.

The present application provides a kind of ecological purification method for treating aquaculture tail water, and is sequentially provided with multifunctional drainage ditch, ecological oxidation dam, stable sedimentation pond, continuous biological filter pond and composite purification bed along the direction of aquaculture tail water flow.The garbage intercepting device, ecological revetment and buffer zone are arranged in the multifunctional drainage ditch;The ecological weir, ecological frame, fixed pile, water collecting wall and lifting pump are arranged in the ecological purification dam;The floating plant area, multiple interception and purification devices and aeration device are arranged in the stable sedimentation pond;The culture area is arranged in the continuous biological filter pond, and after the water flow passes through multiple aeration biological filter areas, it enters the effluent area uniformly;The composite purification bed includes plants, improved substrate layer, purification layer, filtration and water collection layer, impermeable layer and effluent area.The method can effectively remove the refractory pollutants and toxic and harmful substances in aquaculture tail water, has low construction cost, small land area, low operation and maintenance cost, and the effluent can be resource utilization.

The utility model relates to the technical field of municipal engineering, in particular to an anti-theft inspection well cover with a self-adjusting function, which comprises a water storage tank, an opening is formed in the top of the water storage tank, a mounting convex seat is vertically arranged at the bottom in the water storage tank, a first drain hole is formed in the mounting convex seat, and a water storage cavity is defined between the water storage tank and the mounting convex seat; a second drainage hole is formed in the inner bottom of the water storage tank away from the mounting boss; a plurality of sliding plates are arranged at the bottom of the cover body in the perimeter direction of the cover body, each sliding plate is arranged between the water storage tank and the mounting convex base in a sliding mode, a water inlet channel communicated with the water storage cavity is formed between every two adjacent sliding plates, and water inlets are formed in the positions, corresponding to the water inlet channels, of the cover body; the water inlet channel is communicated with the water inlet and the first drainage hole. The anti-theft inspection well cover has the advantages that the inspection well cover automatically floats to increase the water discharge amount when the rainfall is large, meanwhile, an alarm is given out, the safety of driving and pedestrians on a road is improved, and the anti-theft effect is improved and enhanced.

The application provides a civil construction foundation pit anti-collapse supporting device and a mounting and adjusting method. The supporting device is composed of multiple supporting units. Each supporting unit comprises two oppositely arranged supporting plates. An electric telescopic cylinder is horizontally arranged between the two supporting plates. One end of the electric telescopic cylinder is connected with one of the supporting plates. A first pressure sensor is arranged on the connecting surface. A second pressure sensor is arranged on the other supporting plate near the outer side of the foundation pit wall. A siphon drainage device is arranged on the top of one of the supporting plates. Two adjacent supporting units are connected through a tensioning mechanism. The application can make two adjacent supporting plates tightly abut together through the tensioning mechanism, avoid the generation of gaps, and cause the unevenness of the foundation pit sidewall and the seepage. The siphon effect can realize the rapid drainage of the foundation pit. During installation, the supporting force of the two supporting plates can be automatically adjusted according to the real-time collected foundation pit sidewall pressure, displacement and underground water level data.

The present application provides a technique for promoting drainage of generated water in a gas flow path of a fuel cell and reducing pressure loss in the gas flow path. The fuel cell has a membrane electrode composite and a separator that is in contact with the membrane electrode composite and has a first recess provided on a surface in contact with the membrane electrode composite. The fuel cell has a first gas flow path surrounded by the first recess and the membrane electrode composite. The first gas flow path has a first portion and a second portion disposed on a more downstream side than the first portion. The fuel cell has a cross-sectional area changing device that changes a cross-sectional area of a flow path of the first portion and a cross-sectional area of a flow path of the second portion. The cross-sectional area changing device can independently change the cross-sectional area of the flow path of the first portion and the cross-sectional area of the flow path of the second portion.