7results about How to "Increase burst pressure" patented technology

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 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 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.

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 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.