9077 results about "Drain tube" patented technology

The invention provides a centrifugal air conditioner gas-liquid separator, and belongs to the technical field of gas-liquid separators, the centrifugal air conditioner gas-liquid separator comprises a cylinder body and a cylinder cover, the cylinder body is connected with a drainage pipe and an air inlet pipe, the cylinder cover is connected with an exhaust pipe, a supporting ring and a fixing ring are arranged in the cylinder body, a drainage plate, a wind shield and a side plate are arranged in the cylinder body, and a backflow pipe is arranged on the outer wall of the cylinder body. The filter assembly comprises a water absorption piece; the extrusion assembly comprises a telescopic air bag and a fixing plate; the guide assembly comprises a drainage cover, an outer tube and an inner tube, and a rotating rod is arranged in the inner tube; the device has the beneficial effects that the wind shield drives the rotating rod to rotate, so that the turbine fan blades rotate to promote gas emission, and meanwhile, the cleaning plate is driven to clean the surface of the lower filter plate, so that the blockage condition is reduced, the filtering effect is improved, timely and effective cleaning is ensured, in addition, the water absorption part can be automatically extruded to drain water, the maintenance and replacement frequency is reduced, and the working efficiency is improved. The use efficiency is improved.

A drain stopper assembly that can be simply pushed into and pulled out of a drain pipe includes an open-close mechanism, a cap, a drain seal, and a means for engaging the open-close mechanism with the drain pipe and preferably also includes a strainer. The means includes a wheel-shaped disc that rests on crossbars in the drain pipe and has an annular seal about its perimeter; a ball-and-spring detent mechanism for attaching the drain stopper to crossbars; and a magnet attached to the open-close mechanism, preferably with a ferrous adapter for the drain pipe. The open-close mechanism is a push mechanism, a lift-and-lock mechanism or a lift-and-turn mechanism.

Disclosed herein is a urinary catheter system including a urinary catheter, a drainage tube connecting the urinary catheter to a urine collection bag. The urine collection bag is configured to transition between a storage state and a usage state. The urine collection bag includes an intake port coupled to a first opening, an outlet, where the outlet is configured to transition from a closed state to an opened state to allow the volume of fluid to be displaced from the urine collection bag. A storage bag detachably coupled to the urine collection bag, the storage bag having a storage bag opening and configured to receive the male urinary catheter, the drainage tube, and the urine collection bag in the storage state.

The present invention is of a wall to wall drain assembly. The drain assembly comprise of a floor grill, at least one removable end cap, a drain channel, and a drain. The drain assembly may be affixed to a predetermined shower length. The shower dimensions may be of at least thirty inches in length and at most eighty-four inches in length. The drain assembly may require at most two slopes to be installed in a shower floor compartment.

A floor drain system is provided comprising a coupler piece, extension pieces, end caps, and a drain cover. The drain coupler piece includes a connector for connection to a drain line and receivers for engagement with drain extension pieces, forming a drain main body. The main body includes opposed side walls and a floor forming a channel for liquid to flow and drain. Each side wall includes a lip extending inward and along the length of the drain and configured for mounting a grate. End caps are configured for sealing ends of the drain. Alternatively, a light box end piece can be utilized to seal an end of the drain while providing a housing and access point for drain lighting. Tile can be installed overlaying at least part of a top surface of each side wall or abutting the drain. The drain extension pieces can be cut to size.

A washing machine may include: a housing; a tub inside the housing; a drawer case in the housing and including an inlet and outlet through which water is flowable; a drawer insertable into, and withdrawable from, the drawer case, and configured to receive a detergent; a filter detachably mountable in the drawer and configured so that, with the filter mounted in the drawer and the drawer inserted into the drawer case, water that flows into the drawer case through the inlet passes through the filter and then flows out through the outlet-portion; a circulation pipe to guide, to the tub, water that flows out of the outlet; a drain pipe to guide, to an outside of the housing, water that flows out of the outlet; and a flow path switching device configured to flow the water that flows out of the drawer case into the circulation and / or drain pipe.

The invention relates to the technical field of laser rotary cutting, and discloses a laser rotary cutting mechanism for metal part machining. Comprising a laser cutting head connected to the laser rotary cutter, a clamping and rotating mechanism connected to the laser rotary cutter, a movable push block connected to a rack of the laser rotary cutter, a suction pipe installed on the movable push block and a slag suction copper pipe connected to the suction pipe. The arc-shaped scraping plate is arranged in the slag extraction copper pipe and connected with the rotating shaft through the connecting rib, the arc-shaped scraping plate can move along with the extraction pipe, the arc-shaped scraping plate annularly rotates in the slag extraction copper pipe, the arc-shaped scraping plate can effectively scrape metal slag attached to the inner wall, corresponding to the opening, of the slag extraction copper pipe, and the metal slag can be effectively removed through the negative pressure fan of the arc-shaped scraping plate. The scraped metal slag can be smoothly pumped away and cannot be accumulated in the slag pumping copper pipe; and the arc-shaped scraping plate is matched for multiple scraping operations, so that the accumulation thickness of the metal slag on the inner wall of the slag pumping copper pipe is avoided, and the problem of pipeline blockage or unsmooth pumping caused by slag accumulation is reduced.

An elongated floor cleanout assembly includes a drain assembly. The drain assembly has a body assembly and a grating cover secured to the body assembly by at least one screw. The drain assembly also has a cap enclosing the drain assembly and secured to the grating cover by the at least one screw. The cap defines at least one slit having an arcuate portion and an end. The at least one screw is captured in the arcuate portion and the cap can be rotated to selectively allow the at least one screw to freely pass through the end for removal of the cap without removing the at least one screw.

The invention discloses a double-medium thermochemical energy storage system and method. The double-medium thermochemical energy storage system comprises a first regulating valve, a gas storage tank, a thermochemical reactor, a fan, a steam pocket, a water feeding pump and a circulating water pump, the first regulating valve is communicated with an inlet of the gas storage tank through the fan and the electric heater, an outlet of the gas storage tank is communicated with an inlet of a heat exchange tube in the thermochemical reactor, an outlet of the heat exchange tube in the thermochemical reactor is divided into two paths, one path is communicated with an inlet of the fan, and the other path is communicated with a shell side inlet of the steam pocket; a bottom outlet on the shell side of the steam drum is communicated with an inlet of the circulating water pump after being combined with an outlet of the water feeding pump through a pipeline, an outlet of the circulating water pump is communicated with an inlet of a heat exchange pipe in the thermal chemical reactor, a shell side outlet of the thermal chemical reactor is communicated with the pipe side of the steam drum, and a pipe side inlet of the thermal chemical reactor is communicated with a drainage pipe. According to the system and the method, the heat exchange efficiency of the thermochemical reactor can be improved.

The invention discloses mobile water and fertilizer integrated equipment, and relates to the technical field of agricultural planting, the mobile water and fertilizer integrated equipment comprises a flat trolley, a fertilization tank and a crushing mechanism arranged on the fertilization tank, the crushing mechanism comprises a grinding assembly, the grinding assembly comprises a pipe body arranged above the fertilization tank, and an upper grinding disc and a conical lower grinding disc arranged in the pipe body; through the designed crushing mechanism, three-stage bulges are arranged on a conical lower grinding disc, a progressive crushing channel is formed in cooperation with a circular groove of an upper grinding disc, granular fertilizer needs to sequentially pass through gaps among the three-stage bulges, the crushing time of the granular fertilizer is prolonged, the granular fertilizer which is not completely crushed is crushed again in cooperation with the upper grinding disc and a net ring, and the crushing efficiency is improved. A conical plate and a conical seat in the discharging assembly can be synchronous with the rotating speed of a stirring frame and an upper grinding disc by adjusting the size of an opening, so that the concentration of water containing fertilizer liquid discharged from a water discharging pipe is consistent.

A spray-cleaning machine for metal parts, the spray-cleaning machine comprising a bottom plate (1), wherein a first stand (2), a second stand (3), a clean water tank (5), a water collection tank (6), a waste water tank (7), a first water pump (15) and a second water pump (16) are provided on the bottom plate (1); a transmission assembly (4), a first bracket (8), a telescopic rod (9), a second bracket (10), a first spray pipe (11), a fixing plate (12), a second spray pipe (13) and a U-shaped frame (14) are provided on the first stand (2) and the second stand (3); a first connecting pipe (17) is provided at a suction end of the first water pump (15), and a first drain pipe (18) is provided at a discharge end of the first water pump (15); a second connecting pipe (19) is provided at a suction end of the second water pump (16), and a second drain pipe (20) is provided at a discharge end of the second water pump (16); the first spray pipe (11) and the second spray pipe (13) are each provided with a spray head (21) at the bottom; a cleaning assembly (22) is provided on the fixing plate (12); and a hot air blower (23) is provided on the U-shaped frame (14). The spray-cleaning machine for metal parts has a high cleaning efficiency and a good cleaning effect; water can be recycled during the cleaning process, thus saving water; and the metal parts can be dried, which prevents residual water stains that affect the use of the metal parts.

An underdrain filtered water collection system includes: a pair of opposing drainpipes, each drainpipe having a plurality of collection drains; and a diffuser screen. The diffuser screen can slide within an outlet in each of the collection drains. A diffuser screen for a pressure vessel containing filter media includes: a screen pipe; a solid plate coupled to a base of the screen pipe; and a winged diffuser arranged around an outer circumference of the solid plate. The winged diffuser includes a plurality of foldable wings. The screen pipe includes a mesh screen having preconfigured interstices therethrough. Feed water flows through the screen pipe where it is directed by an inner surface of the solid plate to flow in a diffused flow through the interstices of the mesh screen and the wings.

The utility model belongs to the technical field of sewage treatment, and particularly relates to a coalescence air floatation oil removal device for oil and gas field wastewater treatment, which is characterized in that a cyclone sand remover, an oil particle coalescence layer, a micro air floatation device, an oil discharge device and a water discharge pipe are sequentially arranged in a shell from bottom to top, and an exhaust device is arranged at the upper part of one side of the shell; a sewage inlet pipe is arranged on the lower portion of one side of the shell and connected to the feeding end of the cyclone desander. Oily sewage passes through the cyclone sand remover to remove large-particle-size silt, then passes through the oil particle coalescence layer, tiny oil particles gradually form an oil film on the surface of a coalescence material, after the oil film reaches a certain thickness, the oil film is deformed into large oil droplets which are sufficient to be separated and rise from a water phase, and then oil drops and suspended flocs in the oily sewage are removed through the micro air flotation device. Finally, floating oil enters the oil discharging device to be discharged, the oil-removed sewage is discharged through the water discharging pipe, oil-water separation is completed, the oil removal purpose is achieved, the oil removal effect is better, the sewage treatment effect is improved, and the water quality of produced water is improved.

The invention discloses an outdoor roof rainwater collecting mechanism, and relates to the technical field of building design, and the technical scheme is that the outdoor roof rainwater collecting mechanism comprises a house, filter boxes are symmetrically and fixedly connected to the two sides of the house, filter plates are fixedly connected to the sides, close to the house, of the filter boxes, drainage pipes are fixedly connected to the bottoms of the filter boxes, and adjusting shells are fixedly connected to the two ends of the filter boxes; a second motor is arranged in the adjusting shell, a worm is arranged at the output end of the second motor, and a worm gear is connected to the worm in an engaged mode. The transmission rack can be driven to move by starting the second motor in the adjusting shell, and the piston can be driven to move upwards through movement of the transmission rack, so that shielding of the top of the drainage pipe is relieved; rainwater can enter the drainage pipe, then a first motor is started to drive a telescopic rod to rotate, the telescopic rod rotates to drive a movable baffle arranged at the bottom to rotate, and therefore the bottom of the drainage pipe is opened, and highly-polluted rainwater is drained through the bottom of the drainage pipe.

The invention discloses wastewater treatment circulating equipment for water-based ink production, and relates to the technical field of wastewater treatment.The wastewater treatment circulating equipment comprises a box body, a bottom plate is fixedly connected to the bottom face of the box body, mounting grooves are formed in the two sides of the bottom plate, and a control panel is fixedly mounted on the surface of the box body; a drainage pipe is fixedly connected to one side of the box body, a valve is arranged on the drainage pipe, a frame is fixedly installed on the surface of the box body, handles are fixedly connected to the two sides of the frame, supporting plates are fixedly connected to the front side and the rear side of the frame, and supporting plates are fixedly connected to the supporting plates. The device is reasonable in structure, a mixed solution in the box body can be fully reacted conveniently through cooperative use of the adjusting assembly and the stirring assembly, and then liquid attached to the surfaces of the stirring blades is scraped off through the control assembly.

A drain assembly for providing a drain passage for fluid flow from a surface to the drainpipe of a plumbing system. The surface would typically be that of a structure such as that of a floor, a floor of a shower or floor of a bathtub. The drain assembly includes a multi-channel cover wherein each flow channel is configured or curved in such a way to prevent the passage of a ligation (e.g., wire, cord, or rope) through the channels to allow the ligation to be tied to the cover. The multi-channel cover is formed from a plate coupled to one or more annular diverter walls that form a portion of the curved flow channel shape.

The invention relates to the technical field of drainage pipe network defect detection and computer vision, in particular to a drainage pipe network defect detection method based on data optimization and multi-model fusion, and the method comprises the steps: collecting a video in a pipeline through a detection robot, and carrying out the frame extraction to obtain an original image; carrying out the quality optimization of the image through employing a lens fouling restoration algorithm, an image defogging algorithm and an illumination enhancement algorithm; positioning a defect area by using the target detection model, and performing pixel-level segmentation through the U-Net semantic segmentation model to obtain a defect contour; visual features and morphological features are extracted, feature fusion is carried out in combination with an attention mechanism, and finally a classifier is input to realize accurate identification of defect types. Targeted solutions are provided for multiple common imaging defects in the drainage pipe network, the method can adapt to complex and changeable actual detection environments, good generalization ability and practical value are achieved, and reliable technical support can be provided for intelligent operation and maintenance of the urban drainage pipe network.

The present invention discloses a bottle filling device for selenium-rich protein powder, which specifically relates to the technical field of protein powder filling, including a conveyor belt, on which a clamping device and a mounting plate are installed, and a lifting electric guide rail is fixedly installed at the front end of the mounting plate. The bottle filling device for selenium-rich protein powder described in the present invention can crush the protein powder agglomerated inside the storage barrel through the provided grinding device, so as to avoid the agglomeration of the protein powder affecting the canning, and at the same time, it can avoid the agglomeration of the protein powder after canning, which reduces the appearance of the protein powder. The provided feeding device can transport and fill the crushed protein powder, and can also prevent external air from entering the storage barrel to cause the protein powder to become damp and agglomerated, and the anti-flying sleeve outside the conical funnel can cover the outside of the powder bottle inlet to avoid the protein powder from flying during filling, and the air from entering the feeding pipe to cause the protein powder to become damp and agglomerated.

The invention discloses a real-time monitoring device and method for soil disintegration air escape amount and cement dissolution rate. The real-time monitoring device comprises a disintegration tank, the disintegration tank is arranged on a base, a water injection pipe with a valve is arranged at the top of the disintegration tank, a water drainage pipe with a valve is arranged at the bottom of the disintegration tank, and a support is arranged above the disintegration tank. The mechanical sensing unit comprises a lifting rope, a lifting hook, a gas collector, a grid plate, a first tension sensor and a second tension sensor, and the electrochemical monitoring unit comprises an anode electrode plate, a galvanometer, a switch, a direct-current power supply and a cathode electrode plate which are sequentially connected in series through wires to form a closed monitoring loop. Quantifying the dissolution rate of the cement by monitoring a current signal corresponding to the ion concentration change in the solution; the high-definition camera collects disintegration images in real time and synchronously transmits the disintegration images and sensor data to the server. According to the device, through the combined action of the mechanical sensing unit and the electrochemical monitoring unit, the limitation of single-parameter monitoring is solved, and key data support is provided for stability evaluation of geotechnical engineering.

A drain assembly for providing a drain passage for fluid flow from a surface to the drainpipe of a plumbing system. The surface would typically be that of a structure such as that of a floor, a floor of a shower or floor of a bathtub. The drain assembly includes a multi-channel cover wherein each flow channel is configured or curved in such a way to prevent the passage of a ligation (e.g., wire, cord, or rope) through the channels to allow the ligation to be tied to the cover. The multi-channel cover is formed from a plate coupled to one or more annular diverter walls that form a portion of the curved flow channel shape.

The invention provides an ex-situ ecological treatment device for aquaculture pond water, and belongs to the technical field of ecological treatment, the ex-situ ecological treatment device comprises a bearing frame and a first water pump, the upper end of the bearing frame is provided with a detector and a second water pump, the bearing frame is connected with a drainage pipe, and the ex-situ ecological treatment device further comprises a filter assembly used for primary filtration of pond water; the cleaning assembly is used for cleaning the filtering assembly; the aeration assembly is used for performing secondary treatment on the filtered pond water; the transmission assembly is used for promoting the aeration assembly to treat the pond water; the sewage treatment device has the beneficial effects that primary filtration of pond water is completed through the filter cartridge, meanwhile, the scraping plate can scrape impurities on the surface of the filter cartridge to reduce blockage, the aeration pipe and the stirring plate are driven to rotate through the moving plate to promote the aeration effect, and when the surface of the filter cartridge is covered by a biological membrane much, the aeration effect is improved. And the lifting rod and the pressure sensor can trigger the booster pump to work, so that the cleaning of the filter cartridge is realized by decomposing the microbial film through the reagent.

The invention discloses a sponge city rainwater treatment system based on big data, which comprises a data acquisition module, and relates to the technical field of sponge city rainwater treatment.In a rainwater purification module, an automatic purifying agent adding program is started, so that the rainwater purification efficiency is improved, and rainwater is accelerated to flow into the rainwater purification module; a water storage space is vacated for a rainwater regulation and storage facility; a drainage valve of the drainage pipe is in a semi-open state, rainwater overflow in the rainwater regulation and storage facility caused by the fact that a large amount of initial rainwater rapidly flows into the rainwater regulation and storage facility is avoided, and the rainwater is dredged in order; when the time is within the overflow risk time period and reaches the dynamic early warning threshold value, the rainwater is further dredged through the fact that the drainage valve of the drainage pipe is in a full-open state and the operation power of the pump station is increased; at the moment, the rainwater regulation and storage facility conducts intermittent drainage, the time needed for reducing the water stored in the rainwater regulation and storage facility to be below the early warning threshold value is shortened, and the urban waterlogging risk is reduced.

A liquid level controlling apparatus includes a plurality of main sinks, a storage sink, a pump and a connection tube. One of the plurality of main sinks includes a transmission port and a first liquid level detector. The storage sink includes a delivery port and a second liquid level detector. The pump includes an outlet and an inlet. The connection tube includes an rehydration tube and an drain tube. The rehydration tube has a first rehydration section and a second rehydration section. The first rehydration section is connected between the delivery port and the inlet. The second rehydration section is connected between the outlet and the transmission port. The drain tube has a first drain section and a second drain section. The first drain section is connected between the transmission port and the inlet. The second drain section is connected between the outlet and the delivery port.

The utility model discloses a sewage treatment tank and equipment. The sewage treatment tank comprises a tank body, and a drainage pipe assembly is arranged at the bottom of one side of the tank body; the filtering structure is arranged in the tank body and is relatively close to the drain pipe assembly, and the filtering structure comprises a filter screen which is used for filtering water discharged from the drain pipe assembly; the stirring mechanism is arranged in the pool body and comprises a first driving assembly and a stirring plate assembly, and the first driving assembly is used for driving the stirring plate assembly so that the stirring plate assembly can scrape away impurities accumulated on the outer side of the filter screen. Water needing to be discharged is filtered through the filter screen of the filter structure, impurities in the water are prevented from blocking the interior of the drainage pipe, meanwhile, the first driving assembly is started in the drainage process to drive the stirring plate assembly to rotate, and therefore the impurities on one side of the filter screen can be scraped, and the situation that the impurities are accumulated on one side of the filter screen, and water discharge is affected is prevented.

The present invention relates to the field of wastewater treatment technology, and more particularly to a process and apparatus for separating and recovering chromium and lead ions from wastewater. The apparatus comprises a flotation sedimentation tank equipped with an inlet pipe and a drain pipe, a feeding mechanism, and a dispersion mechanism. The flotation sedimentation tank is used to receive the wastewater to be treated. The feeding mechanism is disposed within the flotation sedimentation tank and is used to inject a reactant, a collector, and aeration gas into the flotation sedimentation tank. The dispersion mechanism is connected to the feeding mechanism and is used to disperse the reactant, collector, and aeration gas within the flotation sedimentation tank so that they come into full contact with the wastewater. The process comprises: introducing a reactant into the wastewater to cause the chromium ions and lead ions to react, respectively, to produce a chromium precipitate and a lead precipitate; introducing a collector into the wastewater to cause the lead precipitate to combine with the collector to impart hydrophobicity; aerating the wastewater to cause the lead precipitate to form froth; and separating and recovering the froth from the chromium precipitate. The present invention can achieve simultaneous separation and recovery of chromium and lead ions from wastewater, achieving high separation and recovery rates.

Embodiments relate to a transistor having a substrate and a gate formed in or on a surface of the substrate. The gate can include a piezoelectric material. The transistor has a drain and a source formed in or on a surface of the gate. The transistor has a channel formed adjacent to the gate and located between the drain and the source. The channel can include a semiconductor / semi-metallic material. The transistor can have a source contact formed at the source and configured to anchor the semiconductor / semi-metallic channel material to the piezoelectric material. The transistor can have a drain contact formed at the drain and configured to anchor the semiconductor / semi-metallic channel material to the piezoelectric material. The transistor operates on the principle of voltage induced strain transduction via a piezoelectric gate stack leading to a modification of the interface between the metal contact and the semiconducting / semi-metallic channel material.

The utility model provides a biological nitrogen and phosphorus removal system for sewage, and relates to the technical field of sewage treatment. The system comprises an anaerobic zone, a denitrification anoxic zone, a low dissolved oxygen aeration zone, a solid-liquid separation zone and an equipment zone which are sequentially communicated along a sewage flowing direction, all biochemical areas in the system are operated at high sludge concentration; the anaerobic zone is connected with a water inlet pipe; the solid-liquid separation area is provided with a drainage pipe; and the equipment area comprises stirring equipment and dissolved oxygen providing equipment. According to the biological nitrogen and phosphorus removal system for the sewage, provided by the utility model, the organic matter intake capacity and phosphate release capacity of microorganisms in the anaerobic zone can be improved, and synchronous nitrification and denitrification and denitrification phosphorus removal reaction can be promoted in the denitrification anoxic tank to remove nitrogen and phosphorus; synchronous nitrification and denitrification and phosphorus accumulation reaction can be performed in the low-dissolved-oxygen aeration area, organic matter removal is realized, no additional carbon source is needed, the aeration intensity is small, the operation energy consumption is low, and the treatment effect is good.

The utility model discloses a pulse type cloth bag dust removal device with a cooling structure, relates to the technical field of dust removal devices, and aims to solve the problems that in the prior art, when high-temperature flue gas is subjected to dust removal treatment, the temperature in the device is increased, so that the dust removal efficiency is influenced, and the aging and abrasion of a cloth bag are accelerated. An ash hopper is fixedly installed below the device box body, an air inlet pipe is fixedly installed on one side of the ash hopper and extends into the ash hopper, a first water tank and a second water tank are symmetrically and fixedly installed below the two sides of the device box body respectively, and a water inlet pipe is fixedly installed below one side of the first water tank. A drainage pipe is fixedly installed above one side of the second water tank, a first temperature guide plate and a second temperature guide plate are fixedly installed on the two sides of the lower portion in the device box body along one side of the first water tank and one side of the second water tank respectively, a cooling folded plate is arranged in the device box body, and a water cavity is formed in the cooling folded plate.

The invention discloses a sewage discharge device for chemical engineering environmental protection, and belongs to the field of sewage discharge, the sewage discharge device comprises a sewage treatment tank, the side surface of the sewage treatment tank is provided with a drainage pipe, the outer wall of the sewage treatment tank is fixedly connected with a [-shaped plate, the outer wall of the [-shaped plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a threaded rod, and the threaded rod is fixedly connected with the drainage pipe. The outer wall of the threaded rod is in threaded connection with a moving block, the bottom of the moving block is rotationally connected with a connecting plate A, the lower end of the connecting plate A is fixedly connected with a pesticide barrel, and the middle of the moving block is rotationally connected with a rotating shaft A. According to the sewage treatment device, the outflow amount of liquid medicine can be accurately adjusted according to actual requirements, the applicability of the device is improved, centrifugal force and inertia are generated in the rotating process of the medicine barrel, the liquid medicine can be sprayed to a larger range, the liquid medicine is prevented from being concentrated in one area, and the contact area and the treatment efficiency of the liquid medicine and sewage are improved.

The utility model relates to the technical field of water sample collection, in particular to a water quality stratified sampling device; the device can synchronously collect water samples of different depths, is easy to store and carry, is convenient to operate, and has a more reasonable structural layout; the water sample can be adjusted according to actual needs; it includes a plurality of stratified samplers and a plurality of standard connecting rods, and each two adjacent stratified samplers are connected as a whole through the standard connecting rod. The stratified sampler includes a cylinder, a valve plug slidably installed in the cylinder, a driving rod connected as a whole with the valve plug, and a spring sleeved on the driving rod, one end of the spring abuts against the top wall of the cylinder, and the other end of the spring abuts against the upper part of the valve plug. A water inlet pipe connected with the inside of the cylinder is provided on the upper part of the cylinder, and the valve plug blocks the connection between the water inlet pipe and the cylinder. A drainage pipe connected with the bottom of the cylinder is provided at the bottom of the cylinder, and a switch valve is installed on the drainage pipe. The driving rod passes through the top and bottom of the cylinder, and the driving rods on each two adjacent stratified samplers are threaded at the head and tail.