130results about How to "Prevent water leakage" patented technology

Swimming goggles are provided which include a hard combined frame, a soft left frame and a soft right frame receiving lenses therein, and hard buckles. The hard combined frame includes a first assembling frame, a second assembling frame, and a connecting member connecting the first assembling frame with the second assembling frame. The soft left frame and the soft right frame are respectively assembled on the first assembling frame and the second assembling frame. The hard buckles are respectively assembled on the first assembling frame and the second assembling frame for accommodating a head strap. The connecting member has first portions with bendable flexibility for fitting to users' nose profiles. The first assembling frame and the second assembling frame have second portions with bendable flexibility on parts of side edges thereof for fitting to users' face profiles.

Swimming goggles comprise a frame, eyeglasses, a pad and compressing devices. The eyeglasses are received in the pad, and the compressing devices are mounted on opposite outer sides of the frame for compressing the eyeglasses and the pad, wherein each compressing device includes a first cover and a second cover which are assembled together and receive a head strip. The frame has an upper frame, a lower frame and a nose support. Cracks are defined on both sides of the upper frame and the lower frame. The upper frame forms a gap in a middle of an inner edge thereof for making the frame flexible to bend inwardly thereby fitting for various users who have different face profiles.

An improved motor-driven pump is provided for delivering a flow of water in a swimming pool or spa environment or the like. The improved pump includes a motor mounted within a motor housing having a seal plate mounted at one end thereof. The seal plate carries a shaft bearing for rotatably supporting a drive shaft having an outboard end connected to an impeller disposed within a pump chamber defined cooperatively by the seal plate and a volute housing mounted thereon. A primary seal assembly includes an axially spring-loaded dynamic seal ring carried on the drive shaft for rotation therewith and for running engagement with a stationary bushing carried by the seal plate. A secondary seal assembly is positioned axially between the primary seal assembly and motor bearing, and includes at least one slinger disk for radially outwardly slinging any water leaking past the primary seal assembly through a vent chamber.

The invention discloses a rapid injection technique to cavity among walls of compound shaft. The shaft is sectioned by injection in accordance with the frozen shaft depth, shaft wall thickness and strength and stratigraphic position of water-bearing bed, and the section has height of 100-200 m. When constructing inner layer shaft wall, pre-installing and pre-embedding a vertical sectioned injection pipe adaptable to the height of the injected section, a plurality of injection heads are equipped on the sectioned injection head and communicated with the cavity among walls of plastic interlayer, a plurality of injection points are formed at the same time at one section, the upper end of the sectioned injection pipe is connected with a delivery pipe, and the other end of the delivery pipe is connected with an injection pump via a connecting rubber pipe. The invention has the advantages of simple process, safe and reliable performance, high injection speed, high efficiency, and low cost. And, the occupied time of injection process to cavity among walls to the shaft construction is reduced by 60-90 percent, so as to shorten the shaft construction period.

A water discharge switching device which is easily miniaturized, readily assembled, and manufactured at low cost and prevents leakage of water. The water discharge switching device includes foaming water producing and discharging means having a water inlet (1c), an air/water mixing chamber facing the water inlet (1c) and capable of communicating with the water inlet (1c), an air suction port capable of communicating with the air/water mixing chamber, and a foaming water outlet; shower water discharging means having a shower water discharge port (2d) and capable of communicating with the water inlet (1c), the shower water discharging means being arranged around the air/water mixing chamber of the foaming water producing and discharging means; and water discharge switching means for selectively switching between the discharge of foaming water from the foaming water producing and discharging means and the discharge of shower water from the shower water discharging means. The shower water discharge port (2d) of the shower water discharging means forms the air suction port of the foaming water producing and discharging means.

The invention discloses a drainage pipe fixing and connecting device. The connecting and fixing device is used for connecting a drainage pipe and a soft pipe of an indoor machine of an air conditioner, is arranged at the connecting part between the drainage pipe and the soft pipe, and comprises a supporting ring, an arc-shaped clamping piece and a bolt that is used for connecting the supporting ring and the arc-shaped clamping piece and urges the arc-shaped clamping piece to move in the radial direction. When the device for fixing the drainage pipe and the soft pipe of the indoor machine is being installed, glue is not required, so that the installation is convenient and simple; furthermore, the thrust face of the connecting part is wide and belongs to surface contact, thereby avoiding water leakage, and simultaneously avoiding the cracking of the drainage pipe due to screwing excessively; and the fixing and connecting device can be freely disassembled and maintained conveniently.

The invention belongs to the field of logistics transportation, and particularly relates to a fresh logistics transportation box. The fresh logistics transportation box comprises a box body, a plurality of air-permeable holes are formed in the side wall of the box body, a cylindrical shell is fixedly connected in the box body, and the gap between the cylindrical shell and the box body is filled with a buffer material; an air-permeable groove is formed in the upper side wall of the cylindrical shell, arc-shaped cavities are both formed in the portions, located on the two sides of the air-permeable groove, of the cylindrical shell, an arc-shaped plate is arranged in the air-permeable groove, and an air exchange hole corresponding to the air-permeable groove is formed in the middle of the arc-shaped plate; the two ends of the arc-shaped plate both extend into the two arc-shaped cavities, sealing blocks are fixedly connected to one ends, located in the arc-shaped cavities, of the arc-shaped plates, the sealing blocks are in sliding sealing connection with the arc-shaped cavities, elastic air bags are both fixedly connected to the left side wall and the right side wall of the cylindrical shell, and the elastic air bags communicate with the arc-shaped cavities through the air-permeable holes. According to the box, the air permeability is good, the leakage is not easy, and the survival rate of an aquatic product can be improved.

The invention discloses a movable anti-flood wall which comprises a plurality of vertical column seats, vertical columns and movable baffles. The vertical column seats are fixed on the ground, sealing slots are formed in two sides of the vertical columns, the vertical columns are connected with the vertical column seats respectively through bolts, and the movable baffles between two vertical columns are inserted into the sealing slots of the vertical columns in a spliced manner. The vertical column seats can be fixedly embedded into river coasts or entrances or peripheries of underground garages of hotels, office buildings and the like needing flood control in advance and cannot affect trip of people at ordinary times, and when flood happens and needs to be controlled, the vertical columns can be mounted on the vertical column seats in advance, and the movable baffles are mounted between the vertical columns to form the anti-flood wall. The vertical columns and the movable baffles can be conveniently disassembled and removed after the flood recedes. The movable anti-flood wall effectively solves the problems that when the flood needs to be resisted by the aid of a sandbag wall in flood control and emergency treatment, labor intensity is high, working efficiency is low, water retaining sealing effects are poor, the sandbag wall is easily washed away, the water retaining height is limited and the like.

A method of producing a synthetic resin rod (wire), comprising:

• • an extruding step of extruding a synthetic resin rod;
  • a pre-cooling step of spraying a cooling medium on the rod to pre-cool the rod extruded down to a temperature (T° C.) satisfying the following condition:

T≦{(a softening point of the synthetic resin)+5} [° C.]; and

a main cooling step of letting the rod thus pre-cooled pass through water to cool the rod.

The invention discloses a shield tunnel end reinforcement method. The shield tunnel end reinforcement method comprises the steps that a three-axis mixing pile or a high-pressure jet grouting pile is adopted to reinforce a stratum at a tunnel door, so that soft soil is hardened to increase the stratum strength at the tunnel door; and then in a working well in which a shield machine starts or arrives, a certain number of freezing holes in the extending direction of a shield tunnel are inwardly arranged in a wall to be constructed in the circumferential direction of the tunnel door, and freezingtubes are arranged in the freezing holes for freezing and reinforcing the stratum at the tunnel door. The shield tunnel end reinforcement method solves the problems that the safety risks of start andarrival of the shield machine are increased due to the fact that the environment at the tunnel door is relatively complicated and cement system reinforcement in the form of a combination of the three-axis mixing pile and the high-pressure jet grouting pile cannot be performed due to ground environment restrictions, and the construction risks of start and arrival of the shield machine are reduced.

The invention discloses a waterproof, deodorant and a leak-proof integrated toilet which comprises a wallboard, keels and a bottom plate, wherein the keels comprise keel limiting holes pre-formed in the bottom plate, vertical keels and upper keels; during bottom plate production, a clean water draining device and a sewage draining device which are deodorant are pre-arranged; the wallboard comprises at least one wallboard body which is arranged on a pre-arranged keel, all the wallboards are transversely and longitudinally spliced to form the wallboard; a sunny opening and a shaded opening are simultaneously formed in symmetrical side surfaces of each wallboard body, another sunny opening is formed in one surface of the other symmetrical side surface of each wallboard body and another shaded opening is formed in the other surface of the symmetrical side surface of each wallboard body. The waterproof, deodorant and leak-proof integrated toilet has waterproof and deodorant functions, and can avoid a water leakage problem due to glue failure after many years as a bottom plate and a floor drain of an old integrated toilet are bonded through glass cement, and a pedestal pan and the bottom plate are in sealed connection through glue, and the integrated toilet is relatively easy to dismount and maintain, so that the ceiling and the interior decoration of a lower-layer house are prevented from being damaged, a draining branch tube is prefabricated to greatly remove site construction processes and reduce construction difficulty.

The invention provides a self-bonding air bag sealing device. The self-bonding air bag sealing device comprises a steel casing ring, an internal pressure air bag and a guard plate, wherein, the steel casing ring is provided with an annular bottom plate, a sleeve is arranged on the periphery of the annular bottom plate, and the diameter of an inner ring surface of the sleeve is greater than that of peripheral surfaces of tunneling equipment and a tunnel segment structure; the internal pressure air bag is an annular air bag and is arranged in the inner ring surface of the sleeve; and the guard plate is an annular plate, is provided with an outer ring surface and an inner ring surface and is fixedly arranged on the inner ring surface of the sleeve, the section of the guard plate is in a U shape, the internal pressure air bag is clamped between the outer ring surface of the guard plate and the inner ring surface of the sleeve, and the diameter of the inner ring surface of the guard plate is smaller than that of the peripheral surfaces. The self-bonding air bag sealing device has the beneficial effects that during the traversing and removing process of the tunneling equipment, the guard plate tightly presses the shell of the tunneling equipment with the help of the internal pressure air bag so as to produce the sealing effect between the shell and tunnel segments, thus preventing the phenomena such as water leakage and mud leakage in holes.

A heating cooker which prevents leakage of water even when an inlet of the water feed pipe is placed in any direction, and in which a water feed tank is removably coupled to the water feed pipe in any direction. The heating cooker includes a steam generator to supply steam into a cooking cavity defined in the heating cooker, a water feed tank to supply water into the steam generator, a water feed pipe to supply the water from the water feed tank into the steam generator, with the water feed tank removably coupled to the water feed pipe, a first valve to control an outlet provided on the water feed tank to discharge the water from the water feed tank, and a second valve to control an inlet provided on the water feed pipe to draw the water discharged from the water feed tank into the water feed pipe.

The invention relates to a fire-fighting pipe fitting and a mounting method thereof and belongs to the technical field of fire-fighting. The fire-fighting pipe fitting comprises pipe bodies, a connecting pipe and a fixed pipe; the two ends of the connecting pipe are arranged on the two pipe bodies correspondingly; a fixed ring is fixedly arranged on the inner wall of the connecting pipe; an elastic sealing ring abutting against the end faces of the pipe bodies is arranged on the side wall, near the pipe bodies, of the fixed ring; the fixed pipe comprises two semicircular half pipes and a connecting assembly for fixing the two half pipes; the fixed pipe is arranged outside the connecting pipe in a sleeving way; and an elastic piece for hindering axial sliding of the connecting pipe is arranged on the fixed pipe. When the pipe bodies are subjected to axial impact, the pipe bodies enable an impact for to act on the elastic sealing ring, the elastic sealing ring absorbs one part of impactforce and the remaining impact force drives the connecting pipe to slide axially, so that the elastic piece is compressed, buffering and energy-absorbing effects are achieved, water leakage at the connection position of the pipe bodies is avoided and maintenance cost is reduced.

The invention discloses a photovoltaic waterproof coiled material for a roof and a preparing method. The waterproof coiled material comprises a waterproof protection layer, a flexible photovoltaic assembly layer and a waterproof coiled material layer from top to bottom in sequence, and all the layers are bonded to one another through adhesive; the flexible photovoltaic assembly comprises a flexible thin film photovoltaic assembly, an ethylene-tetrafluoroethylene copolymer layer and a graphene-organosilicone modified polyacrylamide coating layer. The preparing method comprises the steps of firstly, preparing all layers of assemblies, then bonding all layers of assemblies in sequence, and placing the assemblies in a roller press and a laminating machine to be subjected to vacuum processing to make all layers of assemblies tightly combined, so that the photovoltaic waterproof coiled material is obtained. The photovoltaic waterproof coiled material can sufficiently utilize the light energyof the roof and increase the energy utilization rate, and also has a good waterproof and preservative effect, the service life of the waterproof coiled material is greatly prolonged, the using cost is lowered, and the application prospect is good.

The invention discloses an I-beam joint structure preventing flowing around a body and water seeping of an underground diaphragm wall and a construction method thereof. The joint structure is composedof an I-beam formed by welding two pieces of wing plate section steel to one piece of web section steel, grout stopping iron sheets, rubber water stopping belts, vertical sealing ribs at the cornersof the ends of a subsequent slot section, blade feet on the bottom of the I-beam joint and the like; the inner sides of the wing plate section steel of the I-beam joint are welded to horizontally distributed ribs of an early slot section, and the grout stopping iron sheets are welded to the outer sides of the wing plate section steel; the rubber water stopping belts stick to the inner sides of thewing plates of the I-beam of the subsequent slot section by means of binder; the vertical sealing ribs are welded at the corners of the ends of a subsequent slot section steel reinforcement cage. According to the joint structure, the integrity is good, construction is easy, the problem that concrete flows around a body is effectively prevented, the anti-seepage effect in a joint is good, and thestructure is applicable to joint connection of an ultra deep underground diaphragm wall.

A vehicle includes a first panel member, which defines a cabin, and second panel member, which is disposed to face the first panel member from outside of the cabin. The second panel member and the first panel member form a receptacle therebetween. The receptacle contains a window regulator. The first panel member includes a first portion which separates the cabin and the receptacle from each other, and a second portion which separates inside and outside of the cabin from each other. The second panel member covers the first portion of the first panel member from outside of the cabin and is fixed to the second portion.

The invention discloses a novel reinforced concrete drainage pipe and a manufacturing method thereof. For the existing problem in the reinforced concrete drainage pipeline, the invention provides the key technology for manufacturing a novel reinforced concrete pipe in the following three aspects that: a novel anti-corrosion measure and a port type are used against the environmental factors to improve durability of the pipeline and tightness of the port; with regard to the pipeline itself, formulation of reactive powder concrete (RPC) suited for a drainage pipe is employed as the raw material, so that the strength is higher, the stability is better and the structure is more compact to block the possibly formed permeation passage; and the pipe is cheaper and lighter. The method fundamentally improves the basic performance of the reinforced concrete drainage pipeline. Due to the reduced weight and tighter port, the standard length (2.5 m) of the drainage pipeline is lengthened to 4-6 m.

The present invention discloses an electric iron comprising: at least one base unit a main body provided with a water inlet, a water outlet and a water tank connected between said inlet and said outlet; said base unit and said main body may connected or disconnected by a connecting unit; said base unit provided with a water passage which can connected with said water outlet when in assembly with said main body, a steam outlet, a chamber connected between said water passage and said steam outlet and a heating plate used for heating said chamber. Since the base unit can disconnected to the main body, user can choice different heating plates based on different clothing ironing conditions.

The invention discloses an aquaculture pond. A pond body comprises revetments, a pond bottom, a water circulation and purification system and an aeration system, wherein each revetment is made up of a polystyrene-board heat insulating layer, an anti-seepage film material layer, a mortar filter layer and a reinforced concrete revetment plate layer; an earth material protection layer and an anti-seepage film material layer are laid to the pond bottom; a purification tank inlet is formed in the upper end of a tank body of the water circulation and purification system, and a purification tank outlet is formed in the lower end of the tank body; one end of a water drain pipe is connected with a water pumping device, and the other end of the water drain pipe is connected with the purification tank inlet; one end of a water inlet pipe is connected with the purification tank outlet, and the other end of the water inlet pipe is arranged on a side face of the pond body; and the aeration system comprises a solar generator, the solar generator is connected with an oxygen pump through conducting wires, the oxygen pump is connected with a main pipeline through a connecting pipe, the main pipeline is divided into aeration pipes, and a row of exhaust holes are formed in each aeration pipe. According to the pond, the outdoor culture pond can be prevented from failure by heaving in winter, the pond is prevented from leaking water, the aeration is more convenient, water of the pond can be purified, and the healthy and rapid growth of aquatic animals and plants is guaranteed.

The invention discloses a depth-fixed periphery comprehensive water sampler. The depth-fixed periphery comprehensive water sampler comprises a water sampler main body, a first telescopic rod, a sampling pipe and a transmission device, wherein a fixed base is arranged at the left side of the upper end of the water sampler main body, a depth measuring bar is arranged at the upper end of the fixed base, a second telescopic rod sheathes the upper end of the first telescopic rod, a third telescopic rod sheathes the upper end of the second telescopic rod, eight water inlet pipes distributed in a ring array are arranged at the periphery of the bottom of the sampling pipe, a piston is arranged inside the sampling pipe, a sliding column is fixed at the upper end of the piston by virtue of a connecting column, a rotating shaft is arranged on the transmission device, a gear is fixed at the front end of the rotating shaft, a second conical tooth is fixed at the other end of the rotating shaft, a first conical tooth is meshed with the upper end of the second conical tooth, and a rotary inner rod is fixed at the upper end of the first conical tooth. The depth-fixed periphery comprehensive watersampler disclosed by the invention has the advantages that a unidirectional liquid inlet valve is arranged on each water inlet pipe, water leakage when the water sampler is lifted out of water is avoided, water sampling from the periphery on the same water layer is realized, and sampling is reasonable and accurate.

The invention discloses a super-bright surface hub machining machine tool protection device. The super-bright surface hub machining machine tool protection device comprises an enclosure main body. Anoperation opening is formed in the front end of the enclosure main body. Sliding doors are arranged in the operation opening. A limiting strip is arranged at the lower end of the operation opening. Aguide plate is arranged at the upper end of the operation opening. A guide rail is arranged at the lower end of the guide plate. Sliding blocks matched with the guide rail are arranged at the upper ends of the sliding doors. An air cylinder connected with the sliding doors is arranged at the upper end of the guide plate. The lower ends of the sliding doors are in sliding fit with the limiting strip. The two sides of the operation opening are connected with scrap scraping plates through fixing plates, and the scrap scraping plates are connected with the inner sides of the sliding doors. The aircylinder is adopted to drive the sliding doors to achieve the opening and closing process of the sliding doors, meanwhile, the enclosure main body and the sliding doors are connected in a sealed mode, water vapor leakage in the machining process can be prevented, fine flying scraps can be effectively prevented from flying out of gaps through the scrap scraping plate, water leakage and scrap leakage are prevented, the environment is protected, and clean production is achieved. The whole structure adopts sheet metal parts, structural strength is high, weight is light, and transportation is convenient.

The invention relates to a piston-type leak stop. The stop comprises a shell, an impeller, a piston, a movable base and a reduction gear set. Water impels the piston to drive a toothed plate guide slot in the movable base and a final-stage gear in the reduction gear set to engage with each other, and the final-stage gear in the reduction gear set transfers torsion to the toothed plate guide slot to mobilize the toothed plate guide slot so as to control separation of a door closing rod in the piston and the movable base, thus realizing a function of automatic stopping of water leakage. Water leakage is determined based on flow rate of water continuously passing through the piston-type leak stop at one time, and the flow rate of water can be set.

The invention discloses an intelligent family balcony gardening planting system, and belongs to the technical field of plant planting. The intelligent family balcony gardening planting system comprises a planting device, a cloud server and a mobile phone terminal, wherein the planting device comprises a balcony guardrail, a planting pot, a water treatment device and an electronic assembly; the balcony guardrail is arranged on the outer periphery of the balcony and comprises a first pipeline, a plurality of second pipelines, a plurality of first transverse rods, a plurality of second transverserods and a plurality of vertical rods; the first pipeline is in horizontal arrangement; the two ends of the first pipeline are fixedly connected with the wall body; the second pipelines are in vertical arrangement; the upper ends of the second pipelines are communicated with the first pipeline and form a water treatment passage; the lower end of the second pipelines is connected with the balconyground; the first transverse rods are in horizontal arrangement and are positioned in the same height; the first transverse rods are arranged between the second pipelines; the second transverse rods are in horizontal arrangement and are positioned at the same height. The invention aims at providing the intelligent family balcony gardening planting system; the device can solve the problems of waterseepage to the downstairs, potential safety hazards, care and management inconvenience and the like of conventional family balconies.

The invention discloses a fast-inserting new energy vehicle charging device, including a main box, the top of the main box is fixedly connected with a rain shelter through screws, and an operation plate is embedded on the outer surface of the front end of the canopy near the canopy. The outer surfaces of both sides of the main box are far away from the awning and provided with storage grooves; theinner parts of the two storage grooves are slidably connected with storage drawers; the outer surface of the bottom of the main box is welded with a chassis; the outer surface of the bottom of the chassis is provided with an overhead groove; and the outer surface of the bottom of the chassis is embedded with a fixing plate. In this invention, charging gun capable of being fixed by both engagingand magnetizing, abrasion of the charging gun port is prevented, electric clamp fixing is realized. The fast-inserting new energy vehicle charging deviceprevents children from playing and removingI,isolates that rainwater around the charging gun, prevents electric leakage from water intake, and can bend and store the transmission pipe, prevents transportation inconvenience and exposure to sunlight. The fast-inserting new energy vehicle charging device is fixed at a space from the ground, which has anti-theft function, at the same time, prevents more rainwater from flooding the charging devicecausing electric leakage.

The invention discloses a water purifier and a waterway board of the water purifier. The waterway board of the water purifier comprises a raw water inlet, a waste water outlet, a purified water outlet, a raw water waterway, a first rough filtration water waterway, a refined filtration water inlet waterway, a waste water waterway, a first refined filtration water waterway, a second refined filtration water waterway, a purified water outlet waterway, a first-grade filter element water inlet faucet, a first-grade filter element water outlet faucet, a refined filtration water inlet faucet, a refined filtration filter element waste water faucet, a refined filtration filter element water outlet faucet, a postpositional filter element water inlet faucet and a postpositional filter element water outlet faucet. According to the water purifier and the waterway board of the water purifier, raw water can be filtered by the water purifier, and the structure is compact, thereby avoiding the risk of water leakage at the junction of the water purifier; and in addition, a multi-waterway flow direction design is also adopted, so as to meet the requirements of users for multi-waterway output, such as output of purified water and output of pure water.

The invention discloses a sealing structure for a water cooling nozzle plate of a hot core box. The structure comprises a nozzle plate and a plurality of nozzles arranged on the nozzle plate, wherein the nozzle plate is formed by the connection of an upper plate and a lower plate, the connection surface of the upper plate and the lower plate is provided with a water current channel orderly connected with each nozzle, a ring-shaped cooling water channel is arranged in each nozzle along the circumferential direction, the water current channel is communicated with each cooling water channel, the joint between upper plate and the lower plate is provided with a sealed waterproof sealing strip, and the water current channel and the cooling water channels which are communicated are arranged in a closed zone of the sealing strip; by the water current channel, the cooling water is supplied to the cooling water channels in the nozzles to cool down the sand cores in the nozzles and prevent the solidification of the sand cores. Because the channels the cooling water flows by are limited in the enclosed zone of the waterproof sealing strip, the cooling water does not leak out of the sealing strip, thereby effectively avoiding the water leakage.

The invention relates to a vibration-preventing equalizer pipe of a water turbine. The vibration-preventing equalizer pipe comprises an expansion joint, a pipe body and a radial vibration-preventing connecting piece used for being connected with a lining flange. The expansion joint is fixedly connected with the pipe body, and the radial vibration-preventing connecting piece is arranged on the expansion joint. According to the vibration-preventing equalizer pipe, the expansion joint is arranged on the pipe body and the radial vibration-preventing connecting piece is arranged on the expansion joint, so that the expansion joint connected with the pipe body has the functions that the expansion joint extends and retracts in the length direction of the pipe body and swings in the section direction of a pipe opening of the pipe body during vibration, direct hard connection between the pipe body and equipment is avoided, and centralized stress generated on the pipe body is scattered; and accordingly, the situation that water leaks due to the fact that the pipe body is broken by vibration is prevented, accidents are avoided, and the safety coefficient is increased.

The invention discloses a double-layer floating ball type vacuum breaking valve. According to the key points of the technical scheme, after 4-8 upper sealing floating balls are mounted in 4-8 upper floating ball baskets, the upper floating ball baskets are fixed on an upper porous plate; 4-8 upper air inlets are formed on the upper porous plate; the upper porous plate is fixedly arranged on an upper flange of an upper cylinder; a lower sealing floating ball is placed onto a ball bracket with a damping hole; a lower floating ball basket is fixedly arranged on a middle porous plate with a middle air inlet; the lower floating ball basket is covered on the lower sealing floating ball; a lower flange of the upper cylinder, the middle porous plate and an upper flange of a lower cylinder are fixed together by using a middle-position bolt; and a lower flange of the lower cylinder is fixed with a damping porous plate by using a lower bolt. The technical scheme is widely applied to the aspect of vacuum breaking of a water turbine.

The invention discloses a wastewater treatment device which comprises a wastewater treatment device body. A water inlet pipe is installed and fixed to one side of the wastewater treatment device body,a water draining pipeline is installed and fixed to the other side of the water inlet pipe, one end of the water draining pipeline is provided with a connecting mechanism, the connecting mechanism comprises a seal cover, a fixing threaded ring, anti-slip protrusions, a fixing protrusion, a moving hole, trapezoid clamping grooves, a sealing washer, an annular groove and trapezoid protrusions. Theanti-slip protrusions of the device are installed and fixed to the outer surface of the seal cover at equal internals to increase the frictional force of the outer surface of the seal cover, provide convenience for a worker to hold the seal cover convenient to rotate and screw the fix the cover to the surface of the fixing threaded ring, loosening and falling are prevented through a thread, the anti-slip protrusions are clamped and fixed to the trapezoid clamping grooves through the trapezoid protrusions and are prevented from moving in the fixed threaded ring, a sealing effect is improved through the sealing washer, water leakage at the connecting position of a connecting pipe and the water draining pipeline is prevented, and it is convenient that the seal cover counterclockwise turned todismount and replace the connecting pipe and the sealing washer.