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

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.

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.