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

The invention relates to a system for connecting supply lines (1) between a tractive vehicle (2) and a semi-trailer (3) that can be coupled to the latter, a semi-trailer coupling (4) and an automatic line coupling system (5) comprising at least one connector jack (6) being situated on the tractive vehicle (2) and the semi-trailer (3) having at least one supply circuit (7) comprising a first supply console (8) for connecting to the tractive vehicle (2) and for receiving a plug-in element (9) that is located on at least one supply line (1) of the tractive vehicle (2) and / or a plug (10) that is configured to fit the connector jack (6). The aim of the invention is to provide a system for connecting supply lines (1) for tractive vehicles (2), comprising an automatic line coupling system (5) that permits the coupling of conventional semi-trailers (3). To achieve this, a second supply console (11) is located on the tractive vehicle (2) and is permanently connected to the connector jack (6) of the line coupling system (5) and the plug-in element (9) can be selectively connected to the first or second supply console (8, 11).

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.

Provided is an infusion bag reminding and speed limiting device. The infusion bag reminding and speed limiting device is characterized by comprising an infusion bag, a drip capsule and a drip tube; adetector and a speed limiter are connected through a connection line, the detector is clamped at the bottle mouth of the infusion bag, and the speed limiter is clamped on the drip tube; a light emitter and a light receiver are arranged on the portions, at the two ends of the bottle mouth of the infusion bag, on the detector and used for emitting and receiving light signals, and the speed limiter controls the flow speed of medicine liquor in the drip tube after receiving the signals of the detector; when the light emitter and the light receiver are arranged at the two ends of bottle mouth of the infusion bag, a light emitting element in the light emitter aslant emits light to the bottle mouth of the infusion bag. The infusion bag reminding and speed limiting device aims at avoiding the defect that people need to pay attention to new change of the medicine liquor in the infusion bag multiple times for a long time by themselves, and burdens of patients, patient families and nurses are reduced.

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 discloses an infusion tube capable of preventing reverse flow of blood. The infusion tube comprises an infusion dropper, a filter and an infusion needle, wherein the infusion dropper, the filter and the infusion needle are connected by virtue of an infusion tube body; the infusion tube is characterized in that a filter sheet is arranged in the filter; and a liquid one-way piece clings to the lower side of the filter sheet. The infusion tube provided by the invention is simple in structure and low in making cost; and the infusion tube can effectively prevent the blood from reversely flowing into the part above the filter, so that the occurrence of blood complications can be reduced.

The invention discloses a copper melting tank for the production of 6-micron copper foil, which includes a liquid spray chamber, a stirring chamber and a liquid outlet valve connected in sequence, and also includes a driving mechanism, and the stirring and liquid outlet are actually carried out by the same motor At the same time, the resource allocation of the stirring shaft and the liquid outlet valve is realized through the clutch. The retaining ring in the liquid spray chamber blocks the liquid inlet pipe to prevent dust and other debris from entering the liquid spray chamber during the stop of work, and also prevents acid The liquid flows back into the sulfuric acid spray pipe, and the liquid outlet valve is controlled by the control arm, which simply and efficiently converts the lateral rotation of the gear plate used to transmit the motor into a valve reversal. Stirring, and switching of the stirring shaft and valve rotation through the cylinder, effectively improving the efficiency of copper dissolution.