30results about How to "Address pressure fluctuations" patented technology

A movable laboratory with high biological safety is composed of primary experiment cabin, person cleaning and technological supporting cabin including clothes exchanging room, buffering room and substance transfer window between them, air-tight flexible connection channel between said both cabins, and the connected water and air pipelines, cables and signal lines.

A rotary pressure filter apparatus, a sealing device for use with the rotary pressure filter apparatus, and a process of using the apparatus. The rotary pressure filter apparatus is designed to treat a solid-liquid mixture under pressure in successive work zones. A rotary drum moves compartments containing the solid-liquid mixture through the successive zones. The zones are separated by a sealing member. The sealing member is designed to reduce pressure fluctuations as the compartments enter a successive zone.

The embodiment of the invention provides an excavator proportional valve hysteresis compensation method and device, an excavator and a processor, the excavator comprises a main pump, a controller and a proportional valve. The method comprises the steps of obtaining the target action of the main pump; generating a corresponding PWM signal according to the target action of the main pump; superposing a tremor signal on the PWM signal; and outputting the PWM signal superposed with the tremor signal to a proportional valve so as to reduce hysteresis of the proportional valve. By optimizing the program of the controller, the hysteresis condition of the proportional valve is compensated and improved under the condition that the electro-hydraulic control system is not changed and the original PWM (Pulse Width Modulation) output frequency is not changed at the same time. Meanwhile, the PWM output signal is always subjected to change response, so that the control precision of the proportional valve is greatly improved, errors generated when the controller adjusts the proportional valve to do reciprocating movement are reduced, and the precision and stability of the hydraulic system are remarkably improved.

The invention relates to an injection type refrigeration cycle system and a utilization method thereof. The injection type refrigeration cycle system comprises a generator, an injector, a condenser, a throttle valve, an evaporator, a circulating pump, a liquid storage container, a first valve and a second valve, wherein the generator, the injector, the condenser, the circulating pump, the liquid storage container and the first valve are sequentially connected end to end to form a first circulation loop; the injector, the condenser, the throttle valve and the evaporator are sequentially connected end to end to form a second circulation loop; the generator, the second valve, the liquid storage container and the first valve are sequentially connected end to end to form a third circulation loop; and the position of the liquid storage container in the vertical direction is higher than the position of the generator in the vertical direction. According to the injection type refrigeration cycle system, the outlet pressure of the circulating pump is far lower than the outlet pressure of a circulating pump in a traditional injection type refrigeration cycle system, the efficiency of the circulating pump is higher, the size of the integral refrigeration cycle system is effectively decreased, and the practicability is higher.

The invention discloses a continuous cooking anti-reverse spraying device. The device mainly comprises a frequency-variable transmission system, a feeding spiral shaft, a throat pipe, a push-stopping valve, a pressure-stabilizing tank and an air source stabilizer. The device is mainly characterized in that: the rotation speed of the feeding spiral shaft can be automatically adjusted according to the flow change of materials, so a pushing force is kept stable. The working pressure of an air source is not affected by external environment and is kept constant through the air source stabilizer, so that 'material plug' is not damaged by the fluctuation of flow pressure in a feeding process, and the aim of preventing reverse spraying in a continuous cooking and feeding process is fulfilled.

The invention discloses a stable high-pressure medical pump. The stable high-pressure medical pump comprises a pump body, a liquid inlet pipe and a liquid outlet pipe; a first piston cylinder and a second piston cylinder are arranged in the pump body; a first liquid inlet channel and a first liquid discharge channel communicates with an inner cavity of the first piston cylinder; a second liquid inlet channel and a second liquid discharge channel communicates with an inner cavity of the second piston cylinder; the liquid inlet pipe is respectively connected with the first liquid inlet channel and the second liquid inlet channel, and is provided with one-way valves on the first liquid inlet channel and the second liquid inlet channel; a switching valve is arranged on the pump body; the liquid outlet pipe can communicate with the first liquid discharge channel or the second liquid discharge channel through the switching valve; and pistons and piston rods are respectively mounted in the first piston cylinder and the second piston cylinder. The stable high-pressure medical pump comprises two piston cylinders, uses an asynchronous continuous pressing mode of double pistons to realize reciprocating motions of the double pistons, matches with the one-way valves and the switching valve to realize no-gap continuous high pressure, overcomes the fluctuation problem of a water jet scalpel, and keeps excellent cutting performance of the water jet scalpel under constant pressure.

The invention discloses a vacuum pressure swing adsorption system running under a stable pressure and a control process thereof. The system comprises three sets of adsorption towers, fans and vacuum pumps, each set of adsorption towers consists of two adsorption towers, and each adsorption tower circulates according to the running mode of adsorption, primary even pressure drop, secondary even pressure drop, vacuum desorption, secondary even pressure rise, primary even pressure rise and feeding. The system adopts a six-tower process, through optimal control of the process itself, two pressure equalizing is adopted in adsorption and vacuum desorption processes, and compared with the existing two-tower to five-tower process, the fluctuation range is reduced due to one more pressure equalizing, thus solving the pressure fluctuation problem of the system itself, the problems of fan outlet pressure fluctuation and vacuum pump pressure fluctuation can be solved, and the system can operate stably.

The invention provides a dehydration device and method for preparing fuel ethanol based on continuity. The dehydration device comprises a superheater (41) communicated with ethyl alcohol vapor of a high pressure rectifying tower, a regenerative vapor condenser I (71) arranged to be communicated with a hot air source, and a filter device arranged to be used for dehydrating the ethyl alcohol vapor and provided with at least three branch circuits connected in parallel and connected to the position between the superheater (41) and the regenerative vapor condenser I (71), the ethyl alcohol vapor isinjected to the filter device through the superheater (41), the filter device is subjected to dehydration material regeneration treatment through the regenerative vapor condenser I (71), the ethyl alcohol vapor is subjected to dehydration through the filter device, the situation that a molecular sieve adsorbing device is mainly composed of two adsorbers does not exist, therefore the pressure stability of a distillation column is ensured, and the efficiency of alcohol preparation is improved.

The invention provides a control system and method of a hydraulic type CNG filling substation. A control system of the hydraulic type CNG filling substation comprises a hydraulic type long pipe semitrailer and a hydraulic substation pressurizing pry. A gas convergence main pipe on the semitrailer leads up to the back portion of the semitrailer from the front portion of the semitrailer and is connected to a CNG rapid connector and connected with a gas pipeline of the hydraulic substation pressurizing pry. According to the control system and method of the hydraulic type CNG filling substation, through the pipeline system of the filling substation and the CNG semitrailer, automatic control over the full operation process of the hydraulic substation can be achieved, and manual intervention isnot needed; the remaining amount and pressure of CNG in each steel cylinder can be monitored in real time, on the premise of guaranteeing normal operation of the filling substation system, pressure supplementation operation can be automatically conducted on CNG in a steel cylinder without liquid infusion, the pressure fluctuation problem in the gas filling process is solved, especially, the gas filling interruption phenomenon existing in the steel cylinder group switching operation process can be avoided, and the problem that in the prior art, manual operation is needed to balance pressure isavoided; and since automatic continuous operation is conducted, frequent start of a motor is avoided, and the operation energy consumption is lowered.

The invention relates to organic waste gas heat accumulating type heating power incinerator inlet waste gas heating device which comprises an incinerator body. A gas inlet is formed in the upper portion of the incinerator body, a gas outlet is formed in the back end of the incinerator body, a burner is arranged at the front end of the incinerator body, and a burning chamber is arranged at the front end of the interior of the incinerator body; an air supplementing device is arranged at the front portion of the burning chamber, a flame retardant layer is arranged on the exterior of the burning chamber, and an air flow uniform distribution chamber is arranged on the exterior of the flame retardant layer; and a mixing chamber is arranged at the back end of the interior of the incinerator body, and a waste water spraying gun is arranged at the front portion of the mixing chamber. According to the organic waste gas heat accumulating type heating power incinerator inlet waste gas heating device, pressure fluctuation in a hearth is small, and low concentration waste water can be treated.

The invention discloses a multi-channel regenerative air preheater which comprises regenerative chambers, a reversing valve, air inlet and outlet modules, flue gas inlet and outlet modules and a reversing valve driving device; the number of the regenerative chambers is an even number, the reversing valve is arranged in the middle, and the regenerative chambers, the air inlet and outlet modules andthe flue gas inlet and outlet modules surround the reversing valve; and the air inlet and outlet modules, the reversing valve and the flue gas inlet and outlet modules form a straight line, and the multiple regenerative chambers are evenly divided on the two sides. Through the multi-channel regenerative air preheater, the problems that in the prior art, a rotary air preheater is large in air leakage amount, and flow is cut off at the moment of switching of a valve switching type air preheater are solved.

The invention provides a transfer synchronizing mechanism of a high-temperature and high-pressure formation fluid analysis meter. The transfer synchronizing mechanism comprises two high-precision motors (1-1 and 1-2), two high-precision right-angle speed reducers (2-1 and 2-2) connected with the two high-precision motors (1-1 and 1-2) respectively, a host A (3) connected with the high-precision right-angle speed reducer (2-1), a host B (4) connected with the high-precision right-angle speed reducer (2-2), a metal high-pressure line (5) used for connecting the host A (3) and the host B (4), a synchronizing controller (7) connected with the high-precision motor (1-1) and the high-precision motor (1-2), and synchronous control cables (6) used for being connected with the two high-precision motors (1-1 and 1-2) and the synchronizing controller (7) respectively. The high-precision servo motors and the high-precision right-angle speed reducers are adopted, so that the feeding quantity of the host A and the supplementary quantity of the host B are controlled to be consistent, and pressure is also stabilized.