41results about How to "Prevent backflow from entering" patented technology

The invention discloses a copper dissolving tank for 6-micrometer copper foil production. The copper dissolving tank comprises a liquid spraying bin, a stirring bin and a liquid discharging valve which are connected in sequence, and further comprises a driving mechanism. The copper dissolving tank has the beneficial effects that the stirring operation and the liquid discharging operation are actually controlled through one and the same motor, and the resource distribution for a stirring shaft and the liquid discharging valve can be achieved through a clutch; a shielding ring in the liquid spraying bin is used for shielding liquid feeding pipes, so that dust and other impurities can be prevented from entering the liquid spraying bin during the off-work process as well as an acid liquid canbe prevented from flowing back into sulfuric acid liquid spraying pipes; the liquid discharging valve is controlled through control arms, so that the transverse rotation of a gear plate used for transferring the motor can be converted into the turning of a valve; and the entire copper dissolving tank takes both the sulfuric acid liquid spraying operation and the reaction liquid stirring operationinto account, and the rotation switchover between the stirring shaft and the valve is performed through an air cylinder, so that the copper dissolving efficiency can be effectively improved.

A through-flow vacuum seawater desalination plant and method are disclosed. Seawater pump is communicated with seawater tower by pipeline, seawater tower is connected with degassing tank, which is communicated with multi-effect tank, single decalcification softening tank, boiler and heat exchanger, multi-effect tanks are connected serially, which are communicated with condenser, condenser is communicated with gas-liquid separator, condenser is connected with gas-liquid separator or heat exchanger, and multi-effect tank is connected with concentrating tank. The process is carried out by vacuum supplying from multi-effect tank, pre-dipping fresh water outlets in fresh water pool, locating gas extraction opening at the top with level 10 meters above fresh water pool, shutting vacuum pump after vacuum supplying, opening softened water outlet valve with single decalcification, entering softened water into 1-N effect, flowing it into concentrated tank, reaching level of concentrated tank to certain position, operating concentrated tank and evaporating.

The invention provides a high-pressure cleaning machine with a novel water outlet device and belongs to the technical field of high-pressure cleaning machines. The problems that a water outlet device of an existing structure is high in production cost, complex in structure and inconvenient for users to use in the integrated design or split design are solved. The high-pressure cleaning machine with the novel water outlet device is characterized in that a water outlet channel of a high-pressure pump is connected with a water outlet pipe, the output end of the water outlet pipe is connected with a high-pressure water pipe, the water outlet pipe is communicated with a water return pipe connected with a high-pressure pump water return channel, an overflowing valve is fixed in the water return pipe, the water outlet channel and the water outlet pipe are connected or fixed through a clamping pin, the water outlet pipe and the high-pressure water pipe are connected or fixed through a clamping pin, the water return channel and the water return pipe are connected or fixed through a clamping pin, the interior of the water return pipe and the overflowing valve are connected or fixed through a clamping pin, and the water outlet pipe and the water return pipe are of a structure integrally formed by plastics in an injection molding mode. The high-pressure cleaning machine has the advantages that the plastic manufacturing cost is low, the effects of gun closing and pressure maintaining and backflow prevention are achieved, and insulation is safe.

An infusion reminder mainly comprises a reminder and an isolator, wherein the reminder is hung on an infusion bag for use. Through application of the isolator, when medicinal liquid in the infusion bag is used up, air pressure above the medicinal liquid can be increased through downward deformation of an airbag, so that on one hand, the speed of the medicinal liquid injected into a human body is lowered and a nurse has enough time to take away or change the infusion bag, and one the other hand, blood can be prevented from backflowing into a dropper. An infusion apparatus is disposable, but the reminder is required to be reused, and in order to avoid cross infection which is possibly caused by connection between the infusion apparatus and the reminder, the disposable isolator is arranged between the reminder and the infusion apparatus, so that the cross infection which is possibly caused by the connection between the infusion apparatus and the reminder can be effectively prevented.

The invention provides a rain-proof charging pile. The rain-proof charging pile comprises a shell and a charging socket. The shell is hung on a fixed object. A recessed part is arranged on the bottom face of the shell. The socket is arranged in the recessed part of the bottom face of the shell, and a downward baffle is arranged on the periphery of the bottom face of the charging socket. A control panel is arranged on the side face of the shell. The control panel is a waterproof electronic screen. The bottom of the shell is connected with an electric wire clamping part. The electric wire clamping part comprises a rod used for connecting the shell, and the rod is provided with a fixing clamp. The socket is arranged in the recessed part of the bottom, and rainwater can be prevented from flowing back into the socket. The socket and the baffle are arranged at the bottom and cannot be impacted and damaged easily. By means of IC card swiping or mobile phone app recharging, operation is made convenient and easy; and the clamping part is arranged at the bottom and used for fixing an electric wire, and thus the electric wire cannot fall off easily. The rain-proof charging pile has the beneficial effects of being simple in structure, capable of not being damaged easily, safe and reliable, and capable of preventing rainwater from entering the socket.

A transfusion bag prompting and speed limiting device includes a transfusion bag, a dripping bag, and a dripping pipe; a detector and a speed limiter are connected by a connection line; the detector is clamped on a bottle opening of the transfusion bag; the speed limiter is lamped on the dripping pipe; two ends for clamping the bottle opening of the transfusion bag, of the detector are provided with a light-emitting device and a light-receiving device respectively; and the light-emitting device and the light-receiving device are used for emitting and receiving a light signal respectively. The transfusion bag prompting and speed limiting device can avoid the situation that a man must see new change of medicine liquid in the transfusion bag for long time and many times, and can reduce burden of patients, patient family members and nurses.

The invention belongs to the field of aquaculture, and relates to a water body maintenance machine for a fishpond. The water body maintenance machine comprises a shell, wherein a mixing cavity is formed in the upper left portion of the shell, a mixing device is arranged in the mixing cavity, a separation cavity is formed in the lower side of the shell, a separation device is arranged in the separation cavity, a suspension cavity is formed in the shell, a sinking and floating device is arranged in the suspension cavity, a floating cavity is formed in the right side of the shell, and a floating device is arranged in the floating cavity. According to the water body maintenance machine for the fishpond, the cleaning machine can sink and float by itself so as to work underwater and is convenient to carry, and people can track the cleaning machine working underwater during working, so that the cleaning machine cannot float upwards and sinks to the water bottom, elements such as phosphorus in water can be absorbed into excrement, harmful microorganisms in sewage can be eliminated, and the excrement can be efficiently collected and prevented from flowing back into the separation device.

The invention relates to a disc diaphragm aerator. The disc diaphragm aerator comprises a spiral gland, a diaphragm and a base, wherein the diaphragm is arranged between the spiral gland and the base, a flow guide support plate is arranged between the diaphragm and the base, a check valve integrating a hole and a valve is arranged between the flow guide support plate and the base, a filter cover is arranged on the base, an inverted-saddle-shaped wedge plate is arranged below the base, multiple through holes are formed in the diaphragm, and through holes are formed in the edges of the periphery of the flow guide support plate; the base is composed of a bottom disc and a saddle-shaped support, holes are formed in the bottom disc and the saddle-shaped support respectively, the bottom disc is fixedly connected to the saddle-shaped support through a hollow bolt, an internal thread is arranged in the bottom disc and is matched with an external thread outside the spiral gland, and an external thread is arranged outside the bottom disc; an internal thread arranged on the inner wall of an opening in the lower end of the filter cover is matched with an external thread outside the bottom disc, and the filter cover is connected to the bottom disc through threads. The disc diaphragm aerator is not prone to blockage, large in effective aeration area, high in strength, long in service life and high in seal performance and effectively prevents backflow of a water body.