41results about How to "Reduce backflow velocity" patented technology

The invention provides a condom which is made of an elastic material. The condom comprises a closed end, an open end, a tubular condom body positioned between the closed end and the open end, and an elastic ring which is integrally formed on the open end. The condom is characterized in that the elastic ring is a thickened elastic ring of which the diameter is greater than 2.0mm. The invention also provides a preparation method of the condom, which comprises the steps of gum dipping, flanging and demolding. The preparation method is characterized in that in the flanging process, the diameter of the elastic ring of the condom is greater than 2.0mm, and then the condom is completed according to the conventional technique. The elastic ring can be tightened on the root of the penis, and effectively achieves the functions of preventing skid, assisting erection, preventing impotence and prospermia, locking semen, augmenting and lengthening the penis, bringing tight feeling like a virgin to man, and the like.

The invention discloses a spool component resistant to cavitation erosion and erosion wear for a regulating valve. The spool component comprises a spool head, a spool internal throttling element and a spool tail. A horizontal section of the spool internal throttling element is inserted into a central hole of the spool head, and a vertical section of the spool internal throttling element is embedded to a hole formed by connection of the spool head with the spool tail. The spool component forms split-flow transmission of media from two flow passages inside and outside a spool through the spool internal throttling element, so that cavitation erosion and erosion wear damage of the spool can be reduced greatly; and the regulating valve adopting the spool component is better in symmetry of downstream flowing distribution, downstream pipeline erosion wear rate can be decreased, the size of the regulating valve is decreased on the same transmission conditions, and the spool component is applicable to transmission working conditions such as solid containing, high pressure difference, negative pressure outlets and the like and is simple in structure and easy to popularize.

The invention discloses a preparing method of self-vertical skirt-shaped male condom, which comprises the following steps: separating conical structure 1 and mould 3 of sleeve part through baffle 2; connecting mould root 4 and driving device 5; rotating mould through driving device 5; spraying solidifier on the concial structure 1 from sprayer 6; integrating skirt-shaped structure 7 and sleeve part.

The invention discloses an air way for a buffer air column. The air way comprises a first air way and multiple second air ways. The first air way is used for allowing external air to be inflated in and transversely flow. The second air ways communicate with the first air way and are used for allowing the air to flow to an air storage chamber to form the air column. Any second air way comprises anair guide passageway and an air guide opening for allowing the air in the first air way to flow to the air guide passageway, wherein the air guide opening and the air guide passageway can adjust the speed and the pressure of airflow in order to avoid air leakage. The invention further discloses an air column bag with the air way for the buffer air column. By means of the air way for the buffer aircolumn, the air retaining time can be greatly prolonged, the air inflow speed and the reflux speed of the air in the air column can be reduced, impact force of the air for an external film is reduced, thus, the quality of products can be more reliable, and the air closing effect is better.

The invention belongs to the field of photoelectronic device service life prolonging and particularly relates to a method for prolonging the service life of an LED lamp. According to the method, an LED lamp is adopted; a heater is arranged on the outer wall of an air outlet pipe of the LED lamp, a temperature sensor is mounted on the outer wall of a glass container, and a PLC control system is arranged; when the temperature sensor senses that the internal temperature of the glass container does not change, this shows that the LED lamp dissipates heat slowly at present; the heater is controlledto heat the air outlet pipe through a PLC to promote heat conducting liquid to be evaporated to get into an airbag to make the airbag larger, the area of the airbag is increased, cooling is accelerated, and more cooled heat conducting liquid is generated and flows back through a return pipe. Accordingly, heat dissipation of the LED lamp is promoted.

A process for preparing the condom includes preparing the thin main body with sperm storing bag by impregnating once, preparing the thicker durable ring and apron edge by impregnating two or more times, and connecting them by thermal fusing or adhering. It can also play the role of treating impotence and ejaculation praecox.

The process of producing male condom with self erected skirt structure includes the following steps: increasing one conic structure to the bottom of condom mold, covering the condom mold with a hood while exposing the root, the conic structure and the central line part of the mold, spraying coagulant with a nozzle to the exposed mold parts, stoving the mold in an oven, and soaking in conventional method to produce the integrally formed condom. The male condom with self erected skirt structure is convenient and comfortable similar to available ones, and can isolate the contamination of body fluid and prevent sexually transmitted diseases.

The invention discloses an explosionproof internal-combustion forklift truck. The forklift truck comprises an operation and brake system, a dynamical system, a transmission system, an electrical system, an air intake and exhaust system, a heat exchange system and a lifting system, wherein the lifting system is fixedly connected with a truck frame of the explosionproof internal-combustion forklift truck to be used for lifting heavy cargoes; the lifting system comprises forks, a bracket and a hydraulic device; the hydraulic device comprises two stages of hydraulic cylinder assemblies arranged in the front-rear direction; each stage of hydraulic cylinder assemblies comprises a left hydraulic cylinder set and a right hydraulic cylinder set, which are respectively arranged on two sides of the bracket; a flow splitting and baffling structure is arranged at the bottom of an oil cylinder of one of the two hydraulic cylinder sets, and comprises a movable part and a fixed part, which cooperate with each other; the movable part is provided with oil ports; the fixed part is provided with flow baffling walls; the movable part is positioned at the bottom of the movement stroke of a piston rod in the oil cylinder; the piston rod can push the movable part during the movement stroke, so that the flow baffling walls can shield the oil ports. The explosionproof internal-combustion forklift truck disclosed by the invention can effectively solve the technical problems that a lifting system of a conventional internal-combustion forklift truck is liable to shake during working, and the like.

The invention discloses a nodular cast iron pipe die which comprises a supporting base, a first annular guide rail and a cast iron pipe die body. The first annular guide rail is connected to the supporting base, the cast iron pipe die is horizontally inserted into the first annular guide rail in a penetrating mode, and the rear end of the cast iron pipe die is rotationally connected into the first annular guide rail. A rotating speed reduction preventing mechanism is connected between the cast iron pipe die and the supporting base. When the rotating speed of the cast iron pipe die driven by the main driving motor is reduced, the centrifugal force is reduced, so that the main magnet block slides back under the action of resilience force of the first connecting spring, the adsorbed iron sliding block is pulled to be separated from the auxiliary magnet block and extruded to the pressure sensing switch, then the position of the auxiliary driving motor is fixed, and after the auxiliary driving motor is started, the pressure sensing switch is pressed to the pressure sensing switch. The auxiliary driving gear drives the cast iron pipe die to continuously rotate at a certain rotating speed, rotating speed recovery and centrifugal force recovery are achieved, and cast iron pipe manufacturing can be continuously carried out conveniently.

The invention provides a tightening condom which is made of elastic materials and comprises a condom body and an elastic ring, wherein the elastic ring is arranged on the open end of the condom body. The tightening condom is characterized in that the elastic ring is formed in a way that an opening edge part of the open end of the condom body is wrapped on a prefabricated elastic ring. The tightening condom has the following advantages that (1) the elastic ring has strong tightening force, and the back-flow velocity of venous blood of a penis can be effectively reduced, so as to prompt the penis to erect enduringly and rigidly; (2) the ring diameter of the elastic ring can be freely prefabricated as required; (3) the process is simple, and the investment cost is low.

A check valve of double no ¿C return units with rubber diaphragm barrel is composed of valve body, the first non ¿C return unit and the second non ¿C return unit. It is featured as setting fixed bush being fixed by support rib plate in valve body, setting the second non ¿C return unit at outlet section of valve, forming outlet section by barrel ¿C type rubber diaphragm valve clack and support screen case, fixing front end of said valve clack in fixed bush of valve body and fixing support screen case at internal side of valve body.

The invention relates to the technical field of heat-exchanging devices, and discloses a heat pipe and a heat exchanger adopting the same. The heat pipe comprises a pipe body, wherein the cross section of the pipe body takes a tabular shape; the two ends of the pipe body are an evaporation section and a condensation section respectively; a sintering capillary structure is arranged on the inner surface of the upper wall or the lower wall of the cross section of the pipe body; the sintering capillary structure extends in the axial direction of the pipe body and comprises a first heat-exchanging part; the first heat-exchanging part is arranged on the condensation section of the pipe body; the first heat-exchanging part is divided into toothed parts and groove parts. According to the invention, through arranging the sintering capillary structure on the upper wall or lower wall of the heat pipe and arranging the toothed parts and groove parts on the first heat-exchanging part of the sintering capillary structure, a backflow passageway is formed by the toothed parts, the groove parts and the surrounding space, the heat-transfer capability of the heat pipe in the axial direction is enhanced effectively; the porosity and heat-exchanging area are improved through the arrangement of the toothed parts and the groove parts, the backflow speed of the fluid inside the heat pipe is increased, the heat-conducting property of the heat pipe is enhanced, the production materials are saved, the production cost is saved and the economic benefit is better.

The invention discloses a pool bottom structure for producing ultra clear glass. The pool bottom structure comprises a feed port part (7) and a clarification part (8); a first step (1), a second step (2), a third step (3) and a fourth step (4) which are sequentially higher are arranged at the right side of the feed port part (7), a bubbling device (5) is arranged in the middle of the second step (2), a furnace ridge (6) is arranged at the right side of the fourth step (4), and the clarification part (8) is arranged at the right side of the furnace ridge (6). The pool bottom structure for producing the ultra clear glass can accelerate discharging of microbubbles and lower the hot spot temperature and has the advantages of accelerating clarification, blocking reflux of clarified and homogenized glass liquid and stabilizing glass liquid flow.

The invention belongs to the technical field of computers, particularly relates to an intelligent computer CPU radiator, and provides the following scheme for solving the problem that an existing radiator is poor in radiating effect that the intelligent computer CPU radiator comprises a mounting frame, a fixed frame is fixed in the mounting frame, a motor is fixed at the front end of the fixed frame, a motor output shaft is connected with a lantern ring, and a plurality of fan blades are arranged on the circumferential outer wall of the lantern ring; a water passing pipe is fixed to the circumferential outer wall of the lantern ring, a pull rod is arranged at the top of the water passing pipe, a movable groove is formed in the bottom of the pull rod, limiting grooves are formed in the twosides of the water passing pipe, limiting blocks are slidably connected into the limiting grooves, springs are fixed between the limiting blocks and the inner walls of the limiting grooves, and spraying holes are formed in the outer wall of the pull rod. According to the fan, the pull rod is stretched back and forth under the action of centrifugal force, a spring and air resistance, water in the movable groove is sprayed into the heat dissipation cavity through the spraying holes, heat of the fan blades is absorbed for heat exchange, and therefore the temperature of the fan blades is reduced,and the heat dissipation effect is effectively improved.

The invention discloses a lubrication type speed reducer structure suitable for a large gradient. The lubrication type speed reducer structure suitable for the large gradient comprises a speed reducer output shaft and a speed reducer input shaft. The end of the inner side of an input bearing block and the end of the inner side of an output bearing block are correspondingly fixedly provided with a front oil storage baffle and a rear oil storage baffle respectively in a welded mode, and the front oil storage baffle and the rear oil storage baffle correspond to the input bearing block and the output bearing block respectively to form oil storage cavities. The edge of one side of the front oil storage baffle and the edge of one side of the rear oil storage baffle are provided with a plurality of oil inlet holes, and the edge of the other side of the front oil storage baffle and the edge of the other side of the rear oil storage baffle are provided with a plurality of oil passing holes. The positions, located at the oil inlet holes, of the front oil storage baffle and the rear oil storage baffle are fixedly provided with oil isolating rings in a welded mode. According to the lubrication type speed reducer structure, lubricating oil can be isolated into the oil storage cavities, the oil backflow velocity can be reduced during large-gradient work, bearings located at high positions can be still in contact with the lubricating oil, and the purpose of lubricating can be achieved.

The invention discloses an emergency fire rescue positioner. The emergency fire rescue positioner comprises a rescue positioner protection mechanism, wherein the rescue positioner protection mechanism comprises a protection shell, and further comprises buffer main bodies and a handle; the handle penetrates through the protection shell; the handle and the protection shell are mounted together in a sliding manner; the buffer main bodies penetrate through the protection shell; the buffer main bodies and the protection shell are mounted together in a sliding manner; each buffer main body comprises a speed change valve, an impact block, guide rods, an air guide pipe and a first air bag; the buffer main bodies are distributed at four corners of the protection shell; the guide rods are uniformly and fixedly connected to the outer ends of the impact blocks; the guide rods penetrate through the protection shell; the guide rods are in sliding contact with the protection shell; the air guide pipes and the speed change valves are fixedly connected into a whole; and the speed change valves are connected with the inner spaces of the air guide pipes in a penetrating manner. The invention relates to the technical field of fire fighting equipment, and the protection performance of the rescue positioner can be improved, so that the use requirements can be better met.