3results about How to "Large pressure adjustment range" patented technology

The invention discloses a continuous foaming method for polymer particles, comprising the following steps: S1, conveying a suspension and an isolating agent into a polymer bead foaming heating high-pressure-ultra-high-pressure container; S2, heating the suspension and the isolating agent mixture; S3, conveying polymer particles, carbon dioxide and nitrogen mixed gas into the polymer bead foaming heating high-pressure-ultra-high-pressure container successively or simultaneously; S4, the polymer particles are swollen and infiltrated by the mixed gas in the polymer bead foaming heating high-pressure-ultra-high-pressure container, and finally ejected from the foaming nozzle above, at which time the polymer particles expand and foam due to rapid pressure relief to form polymer foaming beads; S5, collecting the polymer foaming beads; The invention also discloses a continuous foaming device for polymer particles, which solves the technical problems of unstable production quality, poor uniformity and low foaming ratio of polymer foaming beads.

This invention belongs to the field of blowout preventer (BOP) control technology, and specifically relates to a BOP control system and method. A wellhead pressure monitoring module monitors the wellhead pressure in real time using a wellhead pressure sensor. A BOP control module monitors and adjusts the BOP pressure in real time. The controller outputs corresponding pressure control signals based on the real-time received wellhead and BOP pressures. A hydraulic power module provides low-pressure adjustment power to the BOP pressure via hydraulic pressure. A pneumatic power module provides high-pressure adjustment power to the BOP pressure via pneumatic pressure. Power is provided to the BOP through the hydraulic and pneumatic power modules. The hydraulic pump enables low-pressure adjustment, and the pneumatic pump enables high-pressure adjustment, thus expanding the pressure adjustment range of the BOP.

The invention belongs to the technical field of tool parts, and particularly relates to universal hydraulic product pressure resistance test equipment which comprises an operation cabinet and a control cabinet installed on the table top of the operation cabinet. A manual pressure regulating knob, an oil inlet / return joint and a safety cover are mounted on the tabletop of the operation cabinet; a hydraulic system and a cooling system are arranged in the operation cabinet; the hydraulic system comprises an oil tank, a radial plunger pump, an energy accumulator, an oil return filter, a proportional overflow valve, a safety valve and a hydraulic pipeline; the cooling system comprises a plate cooler, a hydraulic port of the plate cooler is connected with the oil tank, and a cooling water port is respectively connected with a cooling water inlet and a cooling water outlet on the operation cabinet; an electrical control element is installed in the control cabinet, and buttons, instruments and indicator lamps are arranged on a panel of the control cabinet. The pressure-resistant performance of common hydraulic products can be tested by replacing the hose connector, and the device is simple and reliable in structure, wide in pressure adjusting range and wide in applicable product type.