13results about How to "Increase burst pressure" patented technology

The invention belongs to the technical field of ultrasonic scalpel energy control, and particularly relates to an ultrasonic scalpel energy control method based on a vascular tissue model. According to the method, the blood vessel layering model is established, the mechanical property change of the blood vessel tissue is monitored in real time, the real-time energy loss is accurately calculated, and the real-time output power of the ultrasonic knife system is adjusted in real time according to the real-time loss angle. According to the method, the cavitation, curing and disjunction stages can be judged according to the real-time state of the vascular tissue, energy output is accurately controlled, it is ensured that the large-diameter blood vessel is fully cured, the bursting pressure is increased, and meanwhile thermal damage caused by excessive curing of the small-diameter blood vessel is avoided. The problems that a traditional ultrasonic scalpel system is inaccurate in energy control and poor in adaptability to blood vessels with different diameters can be effectively solved, the heat injury and postoperative bleeding risks in the blood vessel cutting process are remarkably reduced, the operation efficiency is improved, and postoperative recovery of a patient is better facilitated.

The application relates to a balloon catheter, characterized in that the balloon catheter comprises a balloon, a catheter, a terminal tube, a developing ring, a catheter seat, a stress tube and a catheter sleeve, the catheter comprises an inner tube and an outer tube, the outer tube is sleeved outside the inner tube, the distal end of the inner tube is connected with the proximal end of the terminal tube, the distal end of the balloon is fixed on the outer surface of the terminal tube and / or the inner tube, the proximal end of the balloon is fixed on the outer surface of the distal end of the outer tube, the developing ring is arranged on the inner tube in the balloon, the stress tube is fixed on the distal end of the catheter seat, the proximal end of the inner tube is fixed inside the proximal end of the catheter seat through the stress tube and the catheter seat, the proximal end of the outer tube is fixed inside the distal end of the catheter seat through the stress tube and the catheter seat, and the catheter sleeve is sleeved outside the balloon. The balloon catheter can effectively treat arterial or venous stenosis and the like.

The utility model discloses a pouring mold for 180-degree low-pressure casting of an engine cylinder cover. The pouring mold comprises a base, a mold body and a sand core assembly, the mold body is detachably installed on the base, the sand core assembly is detachably installed in the mold body, and the mold body and the sand core assembly jointly define a casting cavity for containing casting liquid; a casting cavity is formed in the mold body, the casting cavity comprises a cover cap surface and a combustion chamber surface which are oppositely arranged, the mold body is provided with a pouring gate, the pouring gate is arranged close to the cover cap surface, and the pouring gate is communicated with the casting cavity through the cover cap surface. According to the scheme, the pouring position of the casting is arranged on the cover cap surface of the engine cylinder cover, so that the engine cylinder cover can be produced through a low-pressure casting process, the casting material yield and the production efficiency are improved, and the casting cost can be effectively reduced.

The invention belongs to the field of engine shell preparation, and particularly relates to a manufacturing device and method for an engine shell reinforced by winding an ultrasonic enhanced end socket cap. Comprising a plurality of metal split dies, a mandrel, an ultrasonic vibration head device and a positioning framework, a through hole is formed in the middle of the mandrel, a circuit of the ultrasonic vibration head device passes through the through hole, positioning frameworks are detachably connected to the corresponding positions, located at the two ends of the cylinder body section of the engine shell, in the mandrel and used for positioning the split dies, and the multiple metal split dies are combined to form a cylinder. And an ultrasonic vibration head device is arranged in each split mold. According to the method, the air tightness, the uniformity and the structural strength of the shell barrel body section and the end socket section are improved through winding reinforcement of the end socket cap, and the porosity is reduced by combining the metal detachable core mold with the ultrasonic reinforcing device, so that the performance and the reliability of the rocket engine are improved.

The utility model belongs to filter equipment technical field provides a needle filter, include: upper casing, including the liquid inlet pipe and upper casing disc that are connected, the edge of upper casing disc is equipped with a plurality of through -hole that passes through upper casing disc, lower casing, including the liquid outlet pipe and lower casing disc that are connected, edge structure, the circumferential of upper casing disc and lower casing disc is covered, to carry out sealed connection to upper casing and lower casing, when upper casing and lower casing assembly, upper casing disc cover is covered on lower casing disc, the circumferential of upper casing disc and lower casing disc is poured to form the edge structure through the pouring process, the edge structure at least partial access to the through -hole, and after forming, the card is established in the through -hole, the edge structure of the utility model can bear higher pressure, avoid in the use process too high pressure leads to filter membrane breakage, and when the liquid inlet pipe liquid, can increase burst pressure, improve liquid flow rate.

The invention discloses a pre-combustion chamber gas engine combustion system with double spark plugs and a control method, belongs to the technical field of gas engines, and solves the technical problems of low combustion speed and high engine thermal load of a traditional spark ignition type natural gas engine. The system comprises a cylinder body, a cylinder cover is arranged at the top of the cylinder body, a cylinder hole is formed in the cylinder body, a piston is arranged in the cylinder hole, a pre-combustion chamber is arranged on the cylinder cover above the axis of the cylinder hole, a main spark plug is arranged in the pre-combustion chamber, and a plurality of first spray holes are formed in the side wall of the pre-combustion chamber. A second spray hole opposite to the combustion center of the main combustion chamber is formed in the bottom of the pre-combustion chamber, and an auxiliary spark plug is arranged on the cylinder cover on one side of the main spark plug and extends to the main combustion chamber. The main spark plug and the auxiliary spark plug can be independently controlled, different combustion control strategies are achieved according to different working conditions of an engine, the in-cylinder combustion speed is effectively controlled, and the problems of low heat efficiency and high exhaust temperature caused by too high or too low combustion speed are solved.

The invention belongs to the technical field of blasting, and particularly relates to a blasting oxygenation device and method adaptive to a plateau low-oxygen environment, the device aims at solving the problem that explosive blasting reaction is incomplete in the plateau hypoxia environment, the device comprises a charging bag placed in a blasting hole, an oxygenation device, a partition device and a sealing plug, the oxygenation device is provided with a shell and a liner bag, and the liner bag is provided with an opening. The inner container bag stores oxygen, the partition device is composed of an upper cover plate and an annular air bag, the oxygen increasing device and the partition device are arranged between every two vertically adjacent charging bags, the sealing plug is located at the top of the blast hole, and when the charging bags are detonated, generated shock waves can enable the inner container bag of the oxygen increasing device to be broken to release oxygen, and meanwhile the annular air bag of the partition device is pushed to expand to seal the hole wall. According to the device, oxygen release and sealing are triggered by means of explosion energy, oxygen is supplemented for a reaction area at the moment of explosion, oxygen is prevented from overflowing, and the plateau explosion effect can be improved.

The present invention discloses a method for measuring friction and accessory loss of a diesel engine, which belongs to the technical field of engine friction loss detection. It mainly solves the technical problem of poor accuracy of existing detection methods. The method is specifically as follows: controlling the intake pressure of the diesel engine and running the diesel engine in reverse to simulate normal operation of the diesel engine, and obtaining reverse power; measuring the cylinder pressure of the intake and exhaust processes of the diesel engine in real time; if the cylinder pressure is greater than a threshold, calculating the indicated power of the pure compression and pure expansion processes according to the thermodynamic polynomial equation; otherwise, obtaining the cylinder pressure curve of the intake and exhaust processes according to the cylinder pressure, and integrating the cylinder pressure curve to obtain the pumping air loss power; obtaining the friction and accessory loss power by reverse power-pumping air loss power+indicated power, and obtaining FMEP by converting the friction and accessory loss power. The present invention also discloses a device for measuring friction and accessory loss of a diesel engine. The present invention can improve measurement accuracy.

The invention belongs to the technical field of micro-fluidic chips, and particularly discloses a micro-fluidic chip based on pressing driving fluid, which comprises a micro-fluidic chip body and a pressing driving pump matched with the micro-fluidic chip body, the micro-fluidic chip body comprises a liquid storage layer and a bottom plate which are stacked up and down, and the liquid storage layer is connected with a pressing driving pump; a first opening is formed in the pressing driving pump, the first opening is matched with a second opening formed in the upper surface of the liquid storage layer through a pump cavity formed in the pressing driving pump, and the second opening communicates with a serpentine channel liquid storage cavity formed in the lower surface of the liquid storage layer through a liquid storage through hole penetrating through the liquid storage layer; an N-shaped capillary explosion valve is arranged at one end, far away from the liquid storage through hole, of the serpentine channel liquid storage cavity; according to the invention, a fluid driving mode which is simple in mode, controllable in fluid and independent of external equipment can be realized, and the influence of the external driving equipment on the active microfluid driving system can be obviously reduced.

This invention relates to the field of rubber hose technology, and discloses a highly flexible and pressure-resistant rubber hose and its preparation method. The preparation method is as follows: An inner layer compound rubber is fed into an extruder and extruded at 70-90°C to form a tubular inner rubber layer. Then, on the surface of the tubular inner rubber layer, polyester tempered brown filaments are braided into a tubular skeleton using a braiding machine, controlling the braiding density to be 80%-95% and the braiding angle to be 45°-60°. Finally, an outer layer compound rubber is fed into an extruder and extruded at 70-90°C to coat the outside of the skeleton layer, forming an integrated composite hose blank. The blank is then fed into a vulcanizing device, controlling the vulcanizing pressure at 0.8-1.2 MPa, the temperature at 150-170°C, and the holding vulcanization for 25-50 minutes. After vulcanization, it is cooled to obtain a highly flexible and pressure-resistant rubber hose. The highly flexible and pressure-resistant rubber hose prepared by this invention has excellent pressure resistance, flexibility, and aging resistance.

The invention relates to the technical field of biomedical polymer preparation, in particular to the technical field of manufacturing of high-value medical instruments suitable for implantation, intervention and the like, and particularly relates to an artificial blood vessel material, a preparation method thereof and a developing artificial blood vessel product. The material provided by the invention is obtained from fluorine-containing polyarylether or is obtained from fluorine-containing polyarylether and a developing agent; the fluorine-containing polyarylether is prepared from a bisphenol monomer and a fluorine-containing monomer; the bisphenol monomer is selected from one or more of biphenol, hydroquinone, bisphenol A, bisphenol AF and bisphenol S; the fluorine-containing monomer is selected from one or more of hexafluorobenzene, decafluorobiphenyl and decafluorobiphenyl ketone. The advantages of polyarylether and fluorine-containing polymer are combined, amorphous fluorine-containing polyarylether easy to process is synthesized, and the developable artificial blood vessel material with the mechanical property meeting the requirements of human blood vessels, high bursting pressure and high suture traction strength is obtained by combining electrostatic spinning, developing technology and solvent steam welding.

The present invention relates to the technical field of physical explosion source bombs, and in particular to a seismic exploration gas explosion type source bomb and its use method. The structure of the source bomb is as follows: a carbon dioxide filling port, a first exhaust port, and a branch pipe are provided on the pressure vessel, the branch pipe is connected to the pressure vessel, and liquid carbon dioxide is loaded in the branch pipe; the branch pipe is installed in the reaction vessel, and the reaction vessel is filled with quicklime that wraps the pipe therein; the water injection port and the second exhaust port are both provided on the reaction vessel, and the insulation layer wraps the pressure vessel and the reaction vessel therein, and the pressure vessel and the reaction vessel respectively form the inner shell and the outer shell of the source bomb, and the carbon dioxide filling port, the first exhaust port, the water injection port, and the second exhaust port are extended to the ports outside the insulation layer. Valves are provided. The present invention uses carbon dioxide expansion as the blasting medium, and uses water and quicklime hydration to generate heat to detonate, which is simpler than electric blasting, does not consume electricity, and is very suitable for field and underwater seismic exploration operations.

The invention relates to the technical field of rubber hoses, and discloses a high-flexibility pressure-resistant rubber hose and a preparation method thereof.The preparation method comprises the following steps that inner-layer rubber compound is put into an extruder and subjected to extrusion molding at the temperature of 70-90 DEG C to form a tubular inner rubber layer, polyester tempered palm fibers are made into a tubular framework on the surface of the tubular inner rubber layer through a braiding machine, and the tubular framework is subjected to extrusion molding at the temperature of 70-90 DEG C; the weaving density is controlled to be 80%-95%, the weaving angle is 45-60 degrees, finally, the outer-layer rubber compound is put into an extruder and extruded at the temperature of 70-90 DEG C to coat the outer side of the framework layer, and a composite hose blank is integrally obtained; feeding the tube blank into vulcanization equipment, controlling the vulcanization pressure to be 0.8-1.2 MPa and the temperature to be 150-170 DEG C, preserving heat and vulcanizing for 25-50 minutes, and cooling after the vulcanization is finished, so as to obtain the high-flexibility pressure-resistant rubber hose. The high-flexibility pressure-resistant rubber hose prepared by the invention has good pressure resistance, flexibility and aging resistance.