7results about How to "Prevent Suckback" patented technology

The utility model relates to the technical field of medical instruments, and discloses a Eustachian tube blowing and expanding device which comprises an air bag ball, a conical tube is integrally formed at the end, away from the air bag ball, of an air outlet tube, an anti-skid ring is integrally formed on the outer wall of the conical tube, and a rubber tube is fixedly arranged on the outer wall of the conical tube in a sleeved mode. And a movable pipe is movably inserted into the rubber pipe, the outer wall of the movable pipe is fixedly sleeved with an annular frame, and a blowing expansion pipe is integrally formed at the end, away from the rubber pipe, of the movable pipe. According to the Eustachian tube blowing and expanding device, the rubber tube and the blowing and expanding tube are stuffed into the Eustachian tube of a patient, the air bag ball is pressed, air in the air bag ball enters the rubber tube, and the air flows out through the blowing and expanding tube, and compared with the prior art, the Eustachian tube blowing and expanding device has the advantages that the effect of blowing the Eustachian tube is achieved, and the air bag ball is not prone to falling off. The problems that an existing eustachian tube blowing and expanding device is large in size and complex to use, and pain of a patient is increased are solved.

The utility model discloses a powder bin assembly and a full-automatic coffee machine, the powder bin assembly comprises a powder bin cup and a push rod mechanism, and the powder bin cup is provided with a through containing cavity; the push rod mechanism comprises a push rod and a cover plate arranged at the top of the push rod, and the push rod drives the cover plate to reciprocate in the containing cavity; the accommodating cavity and the cover plate are enclosed to form a cavity for placing coffee powder; and a water inlet channel is formed in the cover plate. Wherein the filter screen is arranged at the top of the cover plate, and the filter screen is respectively communicated with the cavity and the water inlet channel. Therefore, through the arrangement of the filter screen, the coffee powder can be blocked from the water inlet channel while it is guaranteed that hot water can smoothly enter the cavity, and the phenomenon that the coffee powder is sucked back in the brewing process is avoided. Besides, the filter screen is arranged, so that the flow speed of hot water entering the cavity can be slowed down, the time of the hot water staying in the coffee powder layer is prolonged, complete coffee substances can be extracted, and then the mellowness of coffee liquid is improved.

The utility model discloses an ink production is with storage tank, belong to ink production device technical field. The utility model discloses a storage tank body, scraper and support, be equipped with the storage cavity in the storage tank body, the scraper is contacted with the inner wall of storage cavity, the outer surface of scraper is equipped with counterweight, is equipped with the guide rail in the storage tank body, and the guide rail is linked together with storage cavity, and the counterweight is slidably fitted in the guide rail. The utility model discloses the scraper and counterweight who sets up the ink scraping of storage cavity inner wall, so that when the storage tank body is inclined to a certain angle and pours out the ink, the counterweight slides down along the guide rail, drives the annular scraper and scrapes the ink remaining on the inner wall of the storage tank body, and the counterweight drives the scraper reset when the storage tank body is back to normal, avoids the sealing problem and cost increase problem of using electric push rod, and the structure is simple with the mode of gravity drive, and reliable operation reduces the failure rate and maintenance cost of equipment.

The utility model discloses an anti-suck-back negative pressure aspirator which comprises a liquid storage tank, a transparent observation window is embedded in the side face of the liquid storage tank, four sets of foot pads are fixedly connected to the lower portion of the liquid storage tank, and two sets of right-angle bent pipes communicated with the interior of the liquid storage tank are fixedly connected to the lower portion of the liquid storage tank. One-way liquid passing mechanisms are fixedly connected to the side faces of the right-angle bent pipes, liquid suction heads and liquid outlet heads are arranged on the side faces of the one-way liquid passing mechanisms, a limiting rod is fixedly connected to the upper portion of the liquid storage tank, an upper top plate is arranged on the upper portion of the liquid storage tank, and a limiting hole penetrating to the lower portion of the upper top plate is formed in the upper portion of the upper top plate. By means of the design of the one-way liquid passing mechanism, the suck-back phenomenon of liquid or gas in the using process is effectively prevented, when negative pressure is applied to the liquid outlet, the liquid outlet can be tightly sealed through the sealing check block, the liquid or the gas is prevented from flowing back to the liquid inlet, and therefore the stability and safety in the liquid sucking and discharging process are guaranteed.

The utility model discloses a kind of urethral dosing devices, belong to medical instrument technical field, the urethral dosing device, comprising: syringe, the side of syringe is extended and is provided with support ring, the top surface of support ring is fixedly connected with dosing tube, recessed groove is opened in the outer wall of dosing tube;And fixed component, fixed component includes: front section air bag, connecting air pipe, silica gel air bag and secondary buckle, front section air bag is sleeved in recessed groove, connecting air pipe is arranged in the inside of dosing tube, and one end of connecting air pipe extends to the outside of dosing tube, connecting air pipe and front section air bag are communicated. The urethral dosing device, by syringe containing liquid medicine, dosing tube and silica gel dosing head reduce the stimulation to urethra when applying medicine, front section air bag and fossa navicularis cooperate, and fossa navicularis is plugged, prevent liquid medicine back suction, simultaneously can be loosened buckle after drug action is finished, and the excess liquid medicine is sucked out, liquid medicine can reach urethral deep part, improve the effect of drug.

The utility model discloses an oil and gas well fracturing flow-back fluid treatment device, and belongs to the technical field of oil and gas fields. Comprising a chemical reaction tank and a flocculation reaction tank, the flocculation reaction tank is fixedly arranged in the chemical reaction tank in a sleeved mode, a centrifugal device and a medicine conveying assembly are installed on the chemical reaction tank and the flocculation reaction tank, the centrifugal device comprises a motor, the output end of the motor is in transmission connection with a stirring shaft, the stirring shaft movably penetrates through the flocculation reaction tank, and the medicine conveying assembly is arranged on the stirring shaft. The oil and gas well fracturing flow-back fluid can achieve the one-way conveying effect, is subjected to oil-water separation and centrifugal treatment through the oil-water separator in sequence, and is subjected to coagulating sedimentation and chemical reaction treatment in the flocculation reaction tank and the chemical reaction tank respectively, so that harmful substances and pollutants in the oil and gas well fracturing flow-back fluid are effectively removed, the suck-back phenomenon can be prevented, and the oil and gas well fracturing flow-back fluid can be recycled. Repeated treatment work is avoided, harmless and pollution-free oil and gas well fracturing flow-back fluid can be recycled to the maximum extent, and the recycling efficiency is improved.

The utility model relates to story machine shell mould technical field discloses a story machine shell mould structure, including top positioning assembly, the top of top positioning assembly is fixedly connected with buffer spring, the top of top positioning assembly is fixedly connected with buffer support, the top of top positioning assembly is fixedly connected with fixed stand, the top of top positioning assembly is fixedly connected with positioning pin. The utility model discloses through setting up the fixed ring in the limiting roof and the contact of injection pipe top, disperses the impact of injection pressure to the mould, prevents the cracking caused by local stress concentration, and simultaneously acts as the security barrier, blocks the sputtering risk of high temperature plastic, through setting up the plugging thimble and sliding in the injection pipe, cooperates the fixed ring limit, realizes the injection port opening and closing control, avoids the waste of overflow material, and the thimble closes the runner in the injection completion stage, prevents the phenomenon of back suction, and improves the yield.