79results about How to "Reduce design pressure" patented technology

The invention discloses a two-stage TDC circuit. The two-stage TDC circuit comprises a first counter portion and a second counter portion, wherein the first counter portion comprises a delay unit, a decoding circuit and a latch, a closed-loop delay line type structure is adopted, and the second counter portion is a pseudo random sequence counter. The two-stage TDC circuit is controlled by gating signals, capable of being turned on and off repeatedly, determined in the initial state and rapid in start. The circuit is applied to an array type infrared three-dimensional imaging reading circuit and configured outside, inside or partially outside pixels as required. Compared with an ordinary TDC circuit, the circuit is simple in structure and capable of working at high frequency, improving the temporal resolution, generating stable oscillation frequency simultaneously and satisfying application requirements for small pixel circuit area, low power consumption and high temporal resolution in array type infrared imaging reading circuits.

The invention discloses a first-stage circuit structure of a pipelined analog-to-digital converter, which comprises a 4-digit fully parallel analog-to-digital converter, a code circuit and a residue gain analog-to-digital converter. A two-phase non-overlapping clock is adopted, a sampling phase samples input voltage, and a maintaining phase amplifies residual voltage. The residue gain analog-to-digital converter consists of a sub analog-to-digital converter, a subtracter and a residue amplifier. During sampling, the 4-digit fully parallel analog-to-digital converter conducts comparison and quantification on the input voltage and generates a 16-digit thermometer code which is converted to a 4-digit binary output code by the encoder. A lower pole plate of a sampling capacitor array is connected with the input voltage, and an upper pole plate thereof is connected with a common mode level for sampling an input. During maintaining, the sub analog-to-digital converter outputs different voltages to the sampling capacitor array according to a control of the thermometer code; subtraction from the input voltage is accomplished according to twice charge conservation; and a feedback capacitor is in bridge connection with the two ends of the residue amplifier to amplify the residual voltage by 8 times for use by a backward-stage circuit.

The invention relates to a method and device for charging a battery of terminal equipment. The method comprises the steps of detecting charging voltage of the battery in the charging process of the battery; when detecting that the charging voltage is smaller than or equal to startup voltage of the terminal equipment, charging the battery by adopting first preset current; when the charging voltage is greater than the startup voltage and smaller than the preset voltage, carrying out constant-current charging by adopting the method of ascending charging current to the maximum charging current permitted by the battery in a stepped manner; and when detecting that the charging voltage is increased to preset voltage, descending the charging current to second preset current in a stepped manner and carrying out constant-voltage charging in an on-off charging manner. Through the method and the device, the line damage caused by over-high current at the beginning of constant-current charging is avoided, the design pressure of a charger is lowered, and if abnormal power supply appears, the charger has enough time for protection, so that the uncertain condition due to the fact that the current ascends too fast is effectively avoided, so that the battery is protected.

The invention discloses a suppressing water pool system for a containment. The system comprises a dry well (11) arranged in the upper region of the containment and wet wells (12) arranged in the lower region of the containment, wherein wet well water pools (120) filled with water are arranged in the lower parts of the wet wells (12), and wet well gas space (121) is formed in the upper parts of the wet well water pools (120), and a partition interface (13) in the middle position at the bottom of the dry well (11) sink to form a reactor pit (15); and a plurality of suppressing pipes (14), the inlet of each of which is located in the bottom position of the dry well (11) and the outlet of each of which is located in the bottom position of each of the wet well water pools (120), and the suppressing pipes (14) are located below the water surfaces of the wet well water pools (120). Correspondingly, the invention further discloses a nuclear island containment. According to the embodiment of the invention, pressure increasing of the containment can be quickly inhibited in the early stage of an accident, so that the design pressure of the containment housing is reduced and the suppressing water pool system plays a quite remarkable role of protecting the containment and the system in the containment after the accident.

The invention provides a clock circuit used for a high-speed high-precision SHA-less pipelined analog-to-digital converter. The clock circuit comprises first and second duty ratio stabilizing circuits and first to Nth output clock buffers. The first duty ratio stabilizing circuit generates a clock of which the duty ratio is adjustable and less than 50% and the clock is used for the first stage pipeline time sequence control. The second duty ratio stabilizing circuit generates a clock of which the duty ratio is 50% and the clock is used for the second stage to the Nth stage pipeline time sequence control. The first output clock buffer performs delay tuning on the clock outputted by the first duty ratio stabilizing circuit so as to realize time sequence alignment of the first stage pipeline and the subsequent stage pipeline. The second to the Nth output clock buffers drive the clock outputted by the second duty ratio stabilizing circuit. The two duty ratio stabilizing circuits are connected in series. Time sequence distribution of the first stage pipeline is enabled to be optimized by the clock of which the duty ratio is less than 50% so as to reduce the design difficulty of an operational amplifier, and the second to the Nth stage time sequences are enabled to be optimized by the clock of which the duty ratio is 50% so as to increase the reuse degree of the unit circuit.

The invention discloses an active damping control method of an LCL grid-connected inverter under a static coordinate. The active damping control method comprises seven steps of 1, detecting a grid voltage and carrying out coordinate conversion; 2, detecting a current of a converter side and carrying out coordinate conversion; 3, controlling a DC voltage to obtain a DC reference value of an active current; 4, calculating a two-phase current reference value of the converter side; 5, controlling an AC current; 6, obtaining a compensation value of an output voltage of the inverter through an active damping network; and 7, generating a voltage space vector. With the adoption of the active damping control method, damping control on a resonant peak of an LCL filter can be effectively achieved on the condition that no extra sensor is additionally arranged, moreover, the complexity of an algorithm is simplified, the requirement of the algorithm on a high-performance digital controller is reduced, the efficiency of a system is effectively improved, and the cost of the system is effectively reduced.

A multi-stage process for upgrading tars is provided. A predominantly hydrotreating stage can be applied before a cracking stage, which can be a hydrocracking or a thermal cracking stage. Alternatively, a predominantly cracking stage, which can be a hydrocracking or a thermal cracking stage, can be applied before a hydrotreating stage. Apparatus suitable for performing the method is also provided.

The invention relates to a regeneration process for washing and spraying methanol by low-temperature methanol, which comprises the following steps of: spraying the methanol by virgin gas, cooling the virgin gas, carrying out gas-liquid separation on the virgin gas, carrying out flash evaporation on the methanol and a water condensate, reheating the methanol and the water condensate, rectifying and regenerating the methanol, carrying out flash evaporation on the methanol sprayed by the virgin gas and the water condensate by a flash tank, delivering the flashed vapor of the condensate into an H2S concentration tower, delivering into tail gas finally, carrying out heat exchange between the decompressed methanol, the decompressed water condensate and H2S gas at an outlet of an H2S distillate heat exchanger, delivering the reheated methanol and the reheated water condensate into a methanol water knockout tower for separation, delivering methanol gas at the top of the methanol water knockout tower into a methanol regeneration tower and carrying out rectification and regeneration. Compared with the prior art, the invention has the advantages of low energy consumption, low operating pressure of the heat exchanger, high concentration of H2S in acid gas and the like.

The invention discloses a method and an apparatus for displacement type pressure conveying of a low-temperature liquefied gas. The method and the apparatus have the advantages that no low-temperature pump is needed for conveying the low-temperature liquefied gas to a high-pressure apparatus from a low-temperature liquefied gas, so that no energy is consumed, and a low-temperature storage tank also does not need to be supercharged and thus is prevented from overpressure and emission so that potential safety hazards and waste are prevented, and therefore, the energy source is saved and the ecological environment is protected. The apparatus comprises a displacement unit (44), a BOG (Boil Off Gas) treatment unit (45) and the low-temperature storage tank (24). The apparatus is low in apparatus investment, small in floor area, free of electric power, low in operation maintenance cost and high in safety.

The invention discloses a nuclear power plant passive reactor cavity water injection system. The nuclear power plant passive reactor cavity water injection system comprises a water injection tank, a water injection pipeline, an electric isolation valve and a self-actuated flow control valve assembly, wherein the water injection tank is used for storing water, and injecting water into a reactor cavity; one end of the water injection pipeline is connected with the bottom of the water injection tank, and the other end is connected with the reactor cavity; the water injection pipeline is used forinjecting water in the water injection tank into the reactor cavity; the electric isolation valve is arranged on the water injection pipeline, and is used for controlling the communication or isolation between the water injection tank and the reactor cavity; the self-actuated flow control valve assembly is arranged on the water injection pipeline between the electric isolation valve and the reactor cavity, takes potential energy of the water in the water injection tank as a power source, and is used for keeping water injection flow of the water injection tank in an approximately-stable state.Compared with the prior art, the nuclear power plant passive reactor cavity water injection system has the advantages of simple structure, convenience in arrangement, stable flow control, low requirement on water injection tank distribution, saving in water resources, and capability of improving the running safety of nuclear power plants.

The invention belongs to the technical field of wind power generation and relates to a wind power generation hydraulic control shifting voltage stabilizer. According to the wind power generation hydraulic control shifting voltage stabilizer, automatic gearshift can be achieved, and the range of wind speed adaptation of a wind motor is remarkably improved. The wind power generation hydraulic control shifting voltage stabilizer comprises a three-level planet gear transmission mechanism, a gearshift actuating mechanism, a hydraulic control system, a speed increaser and an adjustable torque converter, a first level sun wheel is connected with a driving disc of a direct gear clutch, a first level gear ring is connected with a second level planetary frame, a second level gear ring is connected with a third level planetary frame, a first level planetary frame, a driven disc of the direct gear clutch and a second level sun wheel are respectively connected with an output shaft of the speed increaser, a centrifugal speed regulating valve is arranged on the output shaft of the speed increaser, a speed increasing gear brake is arranged on the side of the driving disc of the direct gear clutch, a third level gear ring is connected with a turbine of the torque converter, a third level sun wheel and a pump wheel of the torque converter are respectively connected with a generator input shaft, and each level of planet wheels is meshed with one corresponding sun wheel and one corresponding gear ring which are at the same level and is connected with one corresponding planetary frame at the same level through a bearing.

Device for simultaneously cooling and removing liquid from compressed gas of a compressor element (1) or of several compressor elements (1) which are connected either or not in parallel or in series, which device includes a pressure vessel (2) which is provided with a liquid drain (8) at the bottom, an inlet (6) for compressed gas at a distance above the latter and an outlet (18) for compressed gas at the top, latter and an outlet (18) for compressed gas at the top, characterized in that a distribution device (4) is provided in the pressure vessel (2), between the inlet (6) and the outlet (18) for the compressed gas, for spreading a cool fluid in direct contact with the compressed gas, and in that a heat exchanger (5) is provided in the pressure vessel (2) for heating the compressed gas which has been cooled by the cool fluid.

The invention discloses a zoom telecentric lens and an imaging device. The zoom telecentric lens comprises a front optical group arranged in a front lens cone and a rear optical group arranged in a rear lens cone. The front optical group is a fixed group, the rear optical group is a movable group, a diaphragm is arranged between the front optical group and the rear optical group, and the distancebetween the diaphragm and an image plane meets a condition that L/beta is greater than 10 and is less than 30. The rear optical group comprises a sixth lens, a seventh lens and an eighth lens which are sequentially arranged in the incident direction of light, the variable quantity of the distance from the eighth lens to the image plane meets the equation that deltaL4=16.99 (beta2-beta1), the refractive index range of all the lenses in the rear optical group is 1.65-1.75, and an Abbe number range is 30-55. According to the invention, random zoom of the telecentric lens between 2.5 times-10 times is realized by changing the intervals among the diaphragm, the rear optical group and the image plane, the design pressure and the production cost of the telecentric lens are reduced, the assembly process of a telecentric lens zoom system is simplified, and a user experience is improved.

The invention discloses a floating nuclear power station reactor compartment arrangement structure which comprises a double-shell ship body arranged on an offshore nuclear power platform, wherein a primary containment vessel and a spent fuel storage cabin are arranged in an inner cavity of the double-shell ship body; a reactor and primary loop system equipment are arranged in the primary containment vessel; a spent fuel storage facility is arranged in the spent fuel storage cabin; the bottoms and the side faces of the primary containment and the spent fuel storage cabin are elastically connected with the double-shell ship body through elastic connecting structures; a nuclear fuel loading and unloading cabin is arranged on the upper portions of the primary containment and the spent fuel storage cabin; and communication ports are formed between the nuclear fuel loading and unloading cabin and the primary containment and between the nuclear fuel loading and unloading cabin and the spent fuel storage cabin respectively. The nuclear fuel tank has three functions of containment, nuclear fuel loading and unloading and spent fuel storage, and has the characteristics of regular appearance,compact layout, low design pressure and light shielding weight; and an elastic connecting structure is provided, so that the safety of the reactor cabin is further improved.

The invention discloses a digital pre-distortion system and a digital pre-distortion method of a concurrent dual-band envelope tracking power amplifier within specified bandwidth. Modeling aiming at behaviors of the power amplifier considers the following points of 1, distortion caused by cross modulation between signals in two frequency bands; 2, nonlinear distortion caused by an envelope tracking method; and 3, influence of a filter with specified bandwidth on linearization implementation method and effect. The radio frequency signal bandwidth in a traditional digital pre-distortion and power amplification linearization technology is reduced, the bandwidth of an envelope tracking signal is also reduced, and design pressure of an envelop modulator can be effectively relieved; meanwhile, the condition that power of a pre-distortion signal is identical with that of an initial input signal is ensured, iterations are performed, and thus the good power amplification linearization effect isachieved; and the system and the method have wide application prospects in the broadband application.

The invention provides a loop delay compensation circuit and a Sigma Delta analog-to-digital converter, the working current of a differential input pair to an input clock signal is controlled by adjusting the input signal code values of DAC1-DAC4, the phase difference between a clock CKP1 and a clock CKP2 is 90 degrees, the phase difference between the clock CKP1 and a clock CKN1 is 180 degrees, the phase difference between the clock CKP1 and the clock CKP2 is 90 degrees, and the phase difference between the clock CKP1 and the clock CKN1 is 180 degrees. The four groups of clock signals are superposed on the resistor R1 and the resistor R2 at the same time to generate signals which have time delay in a clock period of the CKP1, and the delay time can be controlled by adjusting an input code value of DAC1 < 0: 3 >-DAC4 < 0: 3 >. According to the circuit, the delay time of the high-frequency sampling clock in one period can be adjusted by setting the input code values of the DAC1-DAC4 so as to be used for compensating loop delay, so that the problem of excessive loop delay is solved.

The invention belongs to the technical field of petrifaction expansion joint compensation, and provides an expansion joint used for a cyclone separator. The expansion joint used for the cyclone separator comprises an outlet end pipe (9), an inlet end pipe (1) and a corrugated tube (4). One end of the inlet end pipe (1) is connected with a device, the inner diameter of the inlet end pipe (1) is the same as the inner diameter of the device connected with the inlet end pipe (1), the other end of the inlet end pipe (1) is located in the outlet end pipe (9), and therefore smoke can stably pass through the expansion joint, and impact of high-speed smoke on the inlet end pipe (1) can be avoided. The two ends of the corrugated tube (4) are provided with a supporting annular plate I (7) and a supporting annular plate II (2) respectively. A gap exists between the supporting annular plate I (7) and the inlet end pipe (1), and therefore gas pressure can enter the gap, and the displacement compensation function can be achieved. A plurality of air holes (10) are formed in the supporting annular plate II (2), and therefore the internal pressure of the corrugated tube and the external pressure of the corrugated tube can be communicated, and the design pressure and the work pressure of the corrugated tube can be lowered.

A main brake cylinder for a hydraulic vehicle brake system of a motor vehicle is disclosed. The main brake cylinder includes an electric motor that is operated as a generator for decelerating the motor vehicle. For service braking, pressure is applied to a brake circuit by the main brake cylinder and to another brake circuit by a hydraulic pump. In order to reduce a pedal force, a first piston has a smaller piston surface and a second piston only moves if a greater brake fluid volume is required. A preloaded hydraulic accumulator limits an increase in pressure.