33results about How to "Improve siphon effect" patented technology

The invention relates to a production method for pure cotton single direction wet guiding functional nonwovens, which belongs to the technical field of textile. The production is a treatment method which is free of pollution, convenient and fast and comprises placing the pure cotton nonwovens in an atomization microbead environment with the water repellent effect, enabling atomization microbeads to slowly permeate from one sides of the nonwovens to the other sides of the nonwovens to obtain the single face water repellent effect of the pure cotton nonwovens to enable water repellent components in the pure cotton nonwovens to be distributed in graded mode, forming the good siphon effect, and producing the single direction wet guiding function. The method can effectively solve the problem that during the water repellent treatment process of the pure cotton nonwovens, due to the fact that the pure cotton nonwovens are thin, a water repellency finishing agent easily permeates to the other sides of the nonwovens, enables the both sides of the nonwovens to have the water repellent effect, and the single face water repellent function of the nonwovens. The prepared pure cotton nonwovens has the ideal single direction wet guiding function and are suitable for being used in medical and health products.

The invention relates to the field of fiber processing, and especially relates to a graphene polymer fiber and a preparation method thereof. The preparation method of the graphene polymer fiber comprises the following steps: spinning a graphene mixture and polymer resin mixture used as a core layer and a water-soluble polyester slice used as a skin layer to obtain a double-component composite fiber; and removing the surface water-soluble polyester from the double-component composite fiber to obtain the graphene polymer fiber. The graphene mixture and polymer resin mixture used as the core layer and the water-soluble polyester slice used as the skin layer are spun, and the skin layer is removed through a water dissolving treatment technology to prepare the high-profile degree conductive graphene fiber. The method is simple and is easy to implement; the prepared fiber has high profile degree, and has an enhanced siphon effect on sweat; and a fabric made of the fiber has the characteristics of soft, comfortable, dry and clean hand feeling, high electric conductivity, good antibiosis and bacteriostasis property, and good moisture absorption and sweat perspiration property. The fabric made of the fiber realizes multifunctional compounding of single fibers, and greatly increases the added values of products.

The invention discloses a collecting chamber, a production method of the collecting chamber, an automobile radiator, and a production method of the automobile radiator, which belong to the technical field of automobile radiators. The invention aims to reduce welding seams and improve one-time welded rate of a product. The invention adopts the technical scheme that the collecting chamber comprises a collecting chamber main body and block boards, wherein the collecting chamber main body is a square pipe; a plurality of collecting holes are formed in the bottom surface of the collecting chamber body; a transverse cut-through welding seam is formed in the top surface of the collecting chamber body; the block boards are sealed and fixed on two ends of the collecting chamber body; a water inlet and outlet hole is formed in the side face of the collecting chamber main body. The production method of the collecting chamber comprises the following steps of blanking, stamping to form at the first time, stamping bulges to form the collecting holes, stamping the water inlet and outlet hole, stamping to form at the second time, and fixing the block boards. The automobile radiator is provided with the collecting chamber. The production method of the automobile radiator comprises the following steps of assembling the automobile radiator into a whole, and putting into a brazing furnace for welding at one step.

The invention discloses a negative pressure siphoning-assisting device of a closed water tank. The negative pressure siphoning-assisting device comprises the closed water tank, a pressure control air pipe, a negative pressure air pipe, a water / gas separation chamber and the like. During flushing, negative pressure generated due to decreasing of water level in the closed water tank is used for promoting a sewage drain pipe to fast form siphoning. According to the negative pressure siphoning-assisting device, the purposes of 100% of water consumption flushing, fast siphoning forming, large siphoning force, complete replacement and efficient water saving are achieved, satisfying flushing and replacement effects can be achieved simply by consuming about 3L of water, and the problems of extra little flushing water consumption and poor flushing effect caused by the fact that the existing closestool is provided with ejection holes are well solved.

The invention discloses a closestool flushing method. The method comprises the following steps that 1, a flushing signal generated due to starting of a user is received through a control unit; 2, the control unit starts a valve unit, and a cleaning pipeline of a closestool is kept in a water-running state for T1 seconds; 3, after the cleaning pipeline is kept in the water-running state for T1 seconds, the control unit controls the valve unit, so that the valve unit stops water supply to the cleaning pipeline, and meanwhile a jetting pipeline of the closestool is kept in the water-running state for T2 seconds; 4, after the jetting pipeline is kept in the water-running state for T2 seconds, the control unit controls the valve unit, so that the valve unit stops water supply to the jetting pipeline, and meanwhile the cleaning pipeline is kept in the water-running state once more for T3 seconds; 5, after the cleaning pipeline is kept in the water-running state once more for T3 seconds, the control unit switches off the valve unit to end a flushing control program. By the adoption of the flushing steps, the flushing procedure is operated in a phased mode, the good siphon effect can be generated, water can be saved to a certain extent, in particular, the flushing performance at the time of low pressure is improved, and the method is simple, feasible and obvious in effect.

The invention discloses a spiral toilet blow-off pipe. The spiral toilet blow-off pipe comprises an inlet section, an outlet section, an upper spiral section, a lower spiral section, a lowest top wall of the upper spiral section and a highest top wall of the lower spiral section. The inlet section, the outlet section, the upper spiral section and the lower spiral section are designed into an approximately spiral hollow ring; the upper spiral section and the lower spiral section are not in the same plane; and after eddy current is formed through the inlet section and the upper spiral section by using the inertia force of the water flow, the direction of the eddy current is basically consistent with the structure of the pipe, and the force attenuation of the water flow is extremely low, so that dirt can flow out of the lower spiral section very smoothly. In the whole displacement process, the siphon condition is made without a higher water head at the inlet or jet water flow of higher pressure, so that the spiral toilet blow-off pipe has four advantages of water saving, forcible scouring, difficulty in blockage due to large caliber and complement displacement compared with an S-shaped low-off pipe.

The invention discloses a siphoning principle based low-water-level water closet. The siphoning principle based low-water-level water closet comprises a water closet main body and a water tank, wherein the upper end of the water closet main body and the upper end of the water tank are located in the same plane, the water closet main body comprises a toilet bowl and a blow-off pipe, the lower end of the water tank is connected with the lower end of the toilet bowl through a washing pipe, the blow-off pipe is also connected to the lower end of the toilet bowl, the upper end of the toilet bowl isconnected with a circle of flushing inner culvert, the flushing inner culvert is connected to the water tank through a flushing pipe, and a circle of flushing holes are formed in the inner side of the flushing inner culvert, have angles of 45 degrees and face to the toilet bowl. The siphoning principle based low-water-level water closet has the advantages that in accordance with difference of height of positions I, II and III and the principle of physics, a siphoning effect can be formed; a flushing port is high in water volume and high in pressure, thus, the siphoning force will be very large, and dirt can be removed in shortest time; the flushing holes directly act on the blow-off pipe from a drainage valve, thus, the siphoning effect is better provided, and the effect of scouring manure is improved; the water tank is globally level with the water closet, so that the water closet looks attractive, and materials and space are saved.

The invention discloses a reservoir sand discharging device based on a normal curved surface funnel, and belongs to the technical field of water conservancy projects. The device comprises a sand inlet funnel and a sand conveying pipeline; the sand inlet funnel is located in a sediment accumulation area in a reservoir, the sand conveying pipeline is laid on a reservoir riverbed, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of a dam; and the appearance of the sand inlet funnel is in a bivariate normal curved surface shape, the shape of the sand conveying pipeline is in an anti-hyperbolic tangent curve shape, and a valve is arranged on the sand conveying pipeline. When the device runs, the valve on the sand conveying pipeline is opened, and under the action of water pressure in the reservoir, water flow carries sediment to be discharged into the downstream of the reservoir through the sand discharging pipeline. The normal curved surface shape of the sand inlet funnel and the hyperbolic tangent shape of the sand conveying pipeline can effectively solve the problem that a sand inlet and the interior of the pipeline are prone to being blocked, and the sand discharging efficiency is remarkably improved.

The invention relates to a two-component moisture-absorbing and sweat-dissipating polyurethane elastic fiber and belongs to the field of high-polymer materials. The two-component moisture-absorbing and sweat-dissipating polyurethane elastic fiber is composed of, by weight percentage, 10-35% of a skin component A and 65-90% of a core component B, wherein the skin component A is composed of raw materials including, by weight percentage, 90-97% of polyethylene glycol-based fiber-forming polymer, 0.5-3% of surfactant, 0.5-5% of microporous additives and around 0.1-1% of one or more selected from antioxygen agent, lubricant, anti-yellow agent and flatting agent; the core component B is polyurethane elastic fiber. The invention also discloses a preparation method of the two-component moisture-absorbing and sweat-dissipating polyurethane elastic fiber. The two-component moisture-absorbing and sweat-dissipating polyurethane elastic fiber has the advantages of stable property, good moisture absorbency and excellent sweat dissipation and solves the technical problem that fabrics produced from the polyurethane elastic fiber in the prior art are poor in stability and sweat-dissipating performance.

The invention provides a siphon type large-flow odor-resistant water seal floor drain and belongs to the technical field of floor drains. The siphon type large-flow odor-resistant water seal floor drain aims to solve the technical problem that the water draining speed of an exiting floor drain is small. According to the technical scheme, a siphon assembly is arranged in a water draining cavity of the floor drain and comprises a flow distributing piece and an annular flow resisting boss, the flow distributing piece is located in the water draining cavity and located at the center of the cross section of the water draining cavity, the annular flow resisting boss is arranged along the inner wall of the water draining cavity, and the annular flow resisting boss is located below the flow distributing piece. According to the siphon type large-flow odor-resistant water seal floor drain, the conical flow distributing piece and the annular flow resisting boss arranged in the water draining cavity are matched with each other, when the water draining cavity is filled with water, a remarkable siphon effect can be generated, water is drained more rapidly, and the flow is increased.

The invention relates to sanitary ware, in particular to a rotating siphon type closestool. The rotating siphon type closestool comprises a water inlet located in the joint of a water tank and a closestool body, a main water way located in the closestool body and connected with the water inlet, and a jetting water route connected with the main water way. Two ring way water routes connected with the main water way are arranged in the closestool body and arranged on the two sides of the main water way respectively, and extend to annular inwards-concave water guide grooves formed in the inner edge of an upper opening of a pot body respectively. A ring face jet hole facing the front water guide groove is formed in the tail end of one ring way water route, and a ring face jet hole facing the rear water guide groove is formed in the tail end of the other ring way water route. Water flow sprayed out of the ring face jet holes forms rotating water flow on the surface of a pot cavity. The rotating siphon type closestool is free of ring holes; through the combined action of the water guide grooves and the ring way water routes, the pressure can be increased in the flushing process, it is ensured that the water flow can rotate on the surface of the pot cavity, and the rotating pot body flushing effect is achieved.

The invention discloses a dual-system roof drainage system. The dual-system roof drainage system comprises a siphon type drainage mechanism and a roof independent rainwater drainage mechanism, wherein the siphon type drainage mechanism is used for draining accumulated water through the siphon principle; the roof independent rainwater drainage mechanism comprises a water collection pit formed in a roof cornice; the siphon type drainage mechanism and the roof independent rainwater drainage mechanism are used for draining water through a siphon drainage pipeline and a cornice drainage pipe which are independent of each other; the water collection pit is communicated with the cornice drainage pipe. By adopting the dual-system roof drainage system, the problems that the drainage capacity cannot meet the rainfall capacity in extreme weather since a roof drainage system in the prior art adopts a single system for draining water, and drainage is not performed in time since the siphon drainage system cannot achieve the siphon effect under the general rainfall condition are solved effectively.

The invention relates to a rechargeable battery, especially to a lithium ion power battery. The lithium ion power battery is also provided with fiber paper (101). The fiber paper (101) is arranged on one or two or three or four surfaces of any of four sides of a laminated electrical core (16), wherein the four sides are the upper, lower, left and right sides of the laminated electrical core (16). The laminated electrical core (16) coated with the fiber paper (101) is encapsulated inside a housing (1). The amount of electrolyte in the battery is adjusted via the application of the fiber paper, so that the service life of the lithium ion power battery is prolonged and the safety and reliability are improved. The structure design is elaborate and simple. Technical problems which are not solved in a long time are solved by the application of the simple structure.

The invention discloses a squatting pan which comprises a squatting pan ceramic body, a urinal is arranged at the top of the squatting pan ceramic body, a water sinking bay is arranged at the bottom of the urinal, and the water sinking bay is connected with a blowdown siphon. An annular flushing pipeline is arranged at the top of the urinal, and a flushing hole set is formed in the wall face of the annular flushing pipeline. A water storage space used for preventing external air from entering the water tank drainage pipe from the annular flushing pipeline is formed in the squatting pan ceramicbody, and the bottom of the water storage space is lower than the annular flushing pipeline. The upper portion of the water storage space is communicated with the annular flushing pipeline, and a water inlet used for being connected with a drainage pipe is formed in the side wall of the water storage space. The invention further discloses a squatting pan flushing system comprising the squatting pan. External air is prevented from entering the water tank drainage pipe from the annular flushing pipeline through the water storage space, noise generated when the water tank works is greatly reduced, water capable of directly acting on next flushing can be pre-stored in the water tank drainage pipe after each time of flushing, the stroke of water is saved, and the flushing effect is good.

This application discloses a pre-embedded floor drain in the standpipe of a rainwater drainage system, which includes a protective cover, a water collecting tray, an upper standpipe, a lower standpipe and a main body. Cooperate and insert in the main body; there are several vertical grid plates on the outside of the small round tube, and when the small round tube is inserted into the lower riser, all the grid plates on the outer side of the small round tube are in close contact with the inner wall of the lower riser The accumulated water enters the water collection tray after being filtered by the protective cover, and then flows into the lower standpipe through the water flow channel formed between the outer wall of the small round tube, the grid plate and the inner wall of the lower standpipe. The structure of the present application is simple, and the indented structure in the middle of the main body can accelerate the speed of water flow down, enhance the siphon effect, and enhance the drainage capacity of the floor drain. The middle part of the main body is provided with an indentation structure, the outer part of the main body is provided with baffles, and the grid plate structure is arranged outside the lower part of the main body, which can ensure that the gas is compensated into the lower riser when the flow is full, so that no negative pressure will be formed in the riser, thereby avoiding Sucking occurs.

The invention discloses an adjustable siphon on a drying cylinder. The siphon comprises a horizontal main drain pipe, the inner side end of the main drain pipe is in screwed connection with a connecting head, the connecting head is in screwed connection with a metal hose, the lower end of the metal hose is in screwed connection with an inclined siphon body, and a vertical connecting pipe is bent and molded at the lower end of the siphon body; the lower side of the main drain pipe is provided with a fixing bracket, two arc-shaped pieces are formed on the upper end of the fixing bracket, and thepieces are fixed to the main drain pipe through a bolt assembly; a slot is formed in the end surface of the end, near one end of the siphon body, of the fixing bracket, a vertical rack is inserted into the slot of the fixing bracket, a baffle plate is formed in the middle of the rack, the baffle plate abuts the end surface of the end, near one end of the siphon body, of the fixing bracket, the upper and lower ends of the slot of the fixing bracket are fixed to stopping blocks, and the stopping blocks abut against the upper and lower ends of the rack. The siphon can achieve the precise fine adjustment of the spacing between the head of the siphon body and the inner surface of the drying cylinder so as to achieve the best siphon effect.

The invention discloses a riser pre-buried floor drain of a rainwater drainage system. The riser pre-buried floor drain comprises a protective cover, a water collecting tray, an upper riser, a lower riser and a main body, wherein the main body comprises a large round pipe, a reducing pipe and a small round pipe; the lower end of the upper riser is inserted into the main body in a matched manner; aplurality of vertical grid plates are arranged on the outer side of the small round pipe; the small round pipe is inserted into the lower riser in a matched manner, and meanwhile, all the grid plateson the outer side of the small round pipe are in close contact with the inner wall of the lower riser; and accumulated water enters the water collecting tray after being filtered by the protective cover, and then flows into the lower riser through a water flow channel formed among the outer wall of the small round pipe, the grid plates and the inner wall of the lower riser. The riser pre-buried floor drain disclosed by the invention is simple in structure; a retraction structure in the middle of the main body can accelerate the water flow drainage speed, enhance the siphon effect and enhancethe drainage capacity of the floor drain. The retraction structure is arranged in the middle of the main body, a baffle is arranged on the outer side of the middle of the main body, and the grid platestructure is arranged on the outer side of the lower part of the main body, so that gas can be guaranteed to be compensated into the lower riser during full flow, negative pressure cannot be formed in the risers, and the phenomenon of suction flattening is avoided.

A preparation method of polyester-polyamide knitted elastic fibers comprises the following specific steps of S1, weighing an antibacterial agent, a surfactant, a microporous additive, a maleic anhydride grafted compatilizer, a lubricant and a flame retardant in parts by weight to obtain a mixture A, and dividing the mixture A into a mixture A1 and a mixture A2 in parts by weight; S2, weighing polyester slices and polyamide slices in parts by weight, respectively adding the polyester slices and the polyamide slices into the mixture A1 and the mixture A2, and heating to obtain polyester mixed molten liquid B1 and polyamide mixed molten liquid C1; S3, spinning and cooling to obtain polyester elastic fibers B2 and polyamide elastic fibers C2; S4, twisting the polyester elastic fibers B2 and the polyamide elastic fibers C2 to obtain polyester-polyamide elastic fibers; and S5, pressurizing and preserving heat of the polyester-nylon elastic fibers, and sequentially conducting cooling, oiling,drying, stretching, oiling and winding into a drum to obtain a finished product of the polyester-nylon elastic fibers. The preparation process is simple, the process is controllable, and the polyester-polyamide elastic fibers with excellent performance can be prepared.

The invention discloses a method for flushing a toilet by stages. By employing the method, the discharge of cleaning water and flushing water and be respectively controlled. The method comprises following methods: S1, turning on the cleaning water to wash the sewage bearing surface of a toilet pool, and turning off the cleaning water after the cleaning water is turned on for a preset period T1; S2, turning on the flushing water to flush jet holes at the bottom the toilet pool, so that the sewage in the toilet can be discharged from a pipe, and a siphon phenomenon is formed; S3, turning on the cleaning water again after the flushing water is turned on for a preset period T2, wherein the cleaning water washes the sewage bearing surface of the toilet pool firstly, and then the cleaning water and the flushing water are discharged from the toilet pool the siphon effect; and S4, simultaneously turning off the cleaning water and the flushing water after the cleaning water is turned on for a preset period T3 for the second time. The flushing method is carried out by stages, the toilet has a good siphon effect, the flushing performance for the toilet can be improved, water can be saved at a certain degree, the method is easy and feasible, and obvious effects can be achieved.

The invention discloses an environment-friendly water permeable pavement with metal texture. The environment-friendly water permeable pavement comprises a roadbed layer; wherein the surface of the roadbed layer is sequentially paved from top to bottom a surface layer which is formed by mixing and curing steel slag through an adhesive, a stabilizing layer which is composed of asphalt macadam or cement concrete, a filtering layer which is composed of non-woven geotextile and geogrids which are sequentially arranged from top to bottom, and a permeation layer which is formed by mixing and curing slag through an adhesive. Through cooperation of the above structures, the problems that an existing pavement is single in function, poor in water permeability and noise reduction effect, free of metallic luster and poor in abrasion resistance, and the service life of the pavement is shortened are solved.

The invention relates to the field of fiber processing, and especially relates to a graphene polymer fiber and a preparation method thereof. The preparation method of the graphene polymer fiber comprises the following steps: spinning a graphene mixture and polymer resin mixture used as a core layer and a water-soluble polyester slice used as a skin layer to obtain a double-component composite fiber; and removing the surface water-soluble polyester from the double-component composite fiber to obtain the graphene polymer fiber. The graphene mixture and polymer resin mixture used as the core layer and the water-soluble polyester slice used as the skin layer are spun, and the skin layer is removed through a water dissolving treatment technology to prepare the high-profile degree conductive graphene fiber. The method is simple and is easy to implement; the prepared fiber has high profile degree, and has an enhanced siphon effect on sweat; and a fabric made of the fiber has the characteristics of soft, comfortable, dry and clean hand feeling, high electric conductivity, good antibiosis and bacteriostasis property, and good moisture absorption and sweat perspiration property. The fabric made of the fiber realizes multifunctional compounding of single fibers, and greatly increases the added values of products.

The invention discloses an adjustable siphon on a drying cylinder. The siphon comprises a horizontal main drain pipe, the inner side end of the main drain pipe is in screwed connection with a connecting head, the connecting head is in screwed connection with a metal hose, the lower end of the metal hose is in screwed connection with an inclined siphon body, and a vertical connecting pipe is bent and molded at the lower end of the siphon body; the lower side of the main drain pipe is provided with a fixing bracket, two arc-shaped pieces are formed on the upper end of the fixing bracket, and thepieces are fixed to the main drain pipe through a bolt assembly; a slot is formed in the end surface of the end, near one end of the siphon body, of the fixing bracket, a vertical rack is inserted into the slot of the fixing bracket, a baffle plate is formed in the middle of the rack, the baffle plate abuts the end surface of the end, near one end of the siphon body, of the fixing bracket, the upper and lower ends of the slot of the fixing bracket are fixed to stopping blocks, and the stopping blocks abut against the upper and lower ends of the rack. The siphon can achieve the precise fine adjustment of the spacing between the head of the siphon body and the inner surface of the drying cylinder so as to achieve the best siphon effect.

The invention relates to a production method for pure cotton single direction wet guiding functional nonwovens, which belongs to the technical field of textile. The production is a treatment method which is free of pollution, convenient and fast and comprises placing the pure cotton nonwovens in an atomization microbead environment with the water repellent effect, enabling atomization microbeads to slowly permeate from one sides of the nonwovens to the other sides of the nonwovens to obtain the single face water repellent effect of the pure cotton nonwovens to enable water repellent components in the pure cotton nonwovens to be distributed in graded mode, forming the good siphon effect, and producing the single direction wet guiding function. The method can effectively solve the problem that during the water repellent treatment process of the pure cotton nonwovens, due to the fact that the pure cotton nonwovens are thin, a water repellency finishing agent easily permeates to the other sides of the nonwovens, enables the both sides of the nonwovens to have the water repellent effect, and the single face water repellent function of the nonwovens. The prepared pure cotton nonwovens has the ideal single direction wet guiding function and are suitable for being used in medical and health products.

The invention relates to an efficient energy-saving and easy-to-install building external wall heat preservation underground water storage structure. The structure comprises three parts, namely a climbing net 1, a water storage planting tank 2 and a climbing net fixing mechanism 3. The structure has the advantages that the easy-to-install climbing net is fixed outside a wall body, and the greeningarea is expanded through the growth of climbing type long-vine plants; the extreme temperature of the surface of a building is reduced, and the service life of the building is prolonged; a plant external wall makes the building more attractive; a certain heat insulation effect is provided for the building at high temperature, and a certain heat preservation effect is provided for the building atlow temperature; the climbing-type plant external wall meets the sustainable development requirements of the building for environment protection and energy conservation; rainwater collected in a plastic water pipe can continuously and uniformly reach soil on the roots of the plants according to the siphon principle; meanwhile, a proper siphon depth is selected so that the siphon effect can be optimal.

The invention discloses a drain device for draining water from a water tank by the aid of pressure difference. The drain device comprises a shell, a drain outlet, a floating body, a water storage chamber and a water pumping mechanism. The shell is of a hollow structure, and an opening is formed in the bottom of the hollow structure; the drain outlet is formed in the bottom wall of the water tank; the floating body is movably arranged in the shell and is in seal fit with the drain outlet; the water storage chamber is formed between the inside of the shell and the outside of the floating body and is positioned above the floating body; the water pumping mechanism is communicated with the water storage chamber; water in the water storage chamber can be pumped by the water pumping mechanism, so that up-down pressure difference on the floating body can be changed, the floating body can upwardly float, the drain outlet can be opened, and the water can be drained. The drain device has the advantages that change of the pressure difference on the floating body can be controlled, accordingly, the floating body can float and descend under the control, and the drain device for the water tank can be started and stopped under the control, has low start-stop force values and is simple in structure; the electric control type drain device is easy to design and good in user experience, and electricity can be saved.

The invention discloses a variable motor cabinet capable of automatically preventing rainwater from entering by siphon principle, its structure includes siphon waterproof inflow device, Door locks, cabinet doors, under the action of the height difference between the water guide pipe and the water outlet, enhanced siphon effect, better drain the water collected from the rainwater-proof device, andthe diameter of the inner wall of the catchment tank is 0.1 cm, so that only a small amount of rainwater is needed to make the water level in the catchment tank higher than the commanding elevation point of the pipeline, thereby triggering the siphon effect, Under the action of the water collecting tank and the air guide plate, the rainwater can be collected better to prevent the rainwater from accumulating. Under the action of the starting device and the ventilation closing device, the gap between the ventilation closing device and the air guide plate can be closed to prevent the water from entering the cabinet of the variable motor.

The invention discloses a flushing system of a low-water-tank closestool. The flushing system includes a brush ring pipeline which is used for supplying water to a closestool brush ring, a main flushing pipeline which is used for supplying water to an injection hole in the bottom of a closestool bowl, and an auxiliary flushing pipeline. The water outlet end of the auxiliary flushing pipeline is communicated with the injection hole in the bottom of the closestool bowl, and the water inlet end of the auxiliary flushing pipeline is connected with an external water source through an electromagnetic valve. The water outlet flow velocity and flow of the injection hole can be increased, so that siphon formation of a siphon pipeline of the closestool is accelerated, the siphon effect is better, and the cleaning effect of the closestool is good.

The invention discloses a sand discharge device for a reservoir based on a normal curved funnel, which belongs to the technical field of water conservancy engineering. The device includes a sand inlet funnel and a sand delivery pipeline; The pipeline is laid on the river bed of the reservoir, the bottom of the sand inlet funnel is connected to one end of the sand delivery pipeline, and the other end of the sand delivery pipeline passes through the bottom of the dam; the shape of the sand inlet funnel is a bivariate normal curved surface , the shape of the sand transport pipeline is an inverse hyperbolic tangent curve, and a valve is arranged on the sand transport pipeline. When the device is in operation, the valve on the sand delivery pipeline is opened, and under the action of water pressure in the reservoir, the water flow carries the sediment through the sand discharge pipeline and is discharged into the downstream of the reservoir. The normal surface shape of the sand inlet funnel and the hyperbolic tangent shape of the sand delivery pipeline can effectively solve the problem of easy silting in the sand inlet and pipeline, and significantly improve the sand discharge efficiency.

The invention discloses a water storage tank drainage mechanism for an ice machine. According to the technical scheme, the water storage tank drainage mechanism for the ice machine comprises a water storage tank and a siphon drainage pipe, wherein the water storage tank is used for containing and collecting water for ice-making; the siphon drainage pipe is used for draining the water in the water storage tank; the water storage tank drainage mechanism for the ice machine is characterized in that the bottom surface of the water storage tank is designed to be an inclined surface which forms an included angle with a horizontal plane; and a pumping opening of the siphon drainage pipe is formed in the lowest part of the bottom surface of the tank. The water storage tank drainage mechanism for the ice machine provided by the invention has the technical effects that drainage is complete, the pollution problem of residual water is reduced, the transparency of the made ice is improved, and the water storage tank drainage mechanism has outstanding progresses compared with the prior art.