4results about How to "Stable pressure relief" patented technology

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model relates to the technical field of hot melting cutters, in particular to a hot melting cutter. The hot melting cutter comprises a shell and a conductive part at least partially located in the shell. An accommodating space is formed in the shell; the pressure relief gap is communicated with the outside; the pressure relief gap is positioned on at least one of the shell, the conductive part and the shell and the conductive part; the pressure relief gap is provided with a channel extending from the containing space to the outer side of the shell. And the longitudinal sectional area of the pressure relief gap on one side closest to the accommodating space is larger than that of the pressure relief gap on the outer side closest to the shell. Through the arrangement, the pressure release speed can be reduced, impact and vibration caused by too high flow speed can be avoided, the pressure release process can be better controlled, moisture and water vapor entering is effectively reduced, corrosion and oxidation of internal elements of the hot melting cutter are avoided, the performance of the hot melting cutter is improved, and the service life of the hot melting cutter is prolonged.

The application provides a multi-stage adjustable pulmonary vascular intervention balloon catheter and belongs to the field of medical devices. The catheter is fixedly connected with a tube main body at one end, and the tube main body is fixedly connected with a pressure charging cavity, a guide wire cavity and a pressure relief cavity at the end away from the catheter, respectively. The pressure charging cavity, the guide wire cavity and the pressure relief cavity are in communication with the tube main body. The catheter is fixedly connected with a soft head at one end, and the pressure charging device is arranged at the end of the catheter close to the soft head. The application can trigger the opening of the corresponding valves of the inner, middle and outer three layers of balloons in sequence by means of precise control of the pressure charging pressure, realize the grading expansion effect of the precise shaping of the outer layer of balloons at 6 atm under the pre-expansion of the inner layer of balloons at 2 atm and the superimposed expansion of the middle layer of balloons at 4 atm, avoid the risk of overpressure by matching the spring safety valve opened at 8 atm in the pressure relief channel, enable the balloon to retract quickly and the valve to close automatically by negative pressure suction, reduce the risk of guide wire displacement, shorten the operation time and reduce the radiation exposure of patients.

This utility model discloses a regulating valve for a pressure cooker, including a fixing nut, a regulating valve core, a regulating position, a regulating valve decorative ring, a shock-absorbing spring, a first counterweight, a second counterweight, a regulating valve knob, and a regulating valve cap. The regulating valve decorative ring is fitted onto the regulating position, the lower end of the regulating knob is fitted onto the regulating position, the upper end of the regulating knob is connected to the regulating valve decorative ring and drives its rotation, and the top surface of the regulating position has a level adjustment block. The second counterweight is fitted onto the outer circumference of the regulating valve core and can slide up and down along it, the first counterweight is fitted onto the outer circumference of the second counterweight and can slide up and down along its outer wall, and the regulating valve cap is installed above the second counterweight. The regulating valve cap has a second vent hole that passes through its upper and lower sides, and the lower side of the regulating valve has a sealing block that opens or seals the outlet of the hollow channel of the regulating valve core. This regulating valve has fewer parts, is easy to assemble, has a three-level pressure regulation function, can increase the seal inside the pot or release vent pressure, and can stabilize the pressure release.