54results about How to "Large pumping capacity" patented technology

A packaging structure including at least one cavity wherein at least one micro-device is provided, the cavity being bounded by at least a first substrate and at least a second substrate integral with the first substrate through at least one bonding interface consisting of at least one metal or dielectric material, wherein at least one main face of the second substrate provided facing the first substrate is covered with at least one layer of at least one getter material, the bonding interface being provided between the first substrate and the layer of getter material.

This invention includes the implementation of several unconventional droplet manipulations on a superhydrophobic-patterned surface microfluidic platform, which may be applied to automated biological analyses and point-of-care diagnostic applications.

The invention discloses an anhydrous sodium sulfate preparation method and an anhydrous sodium sulfate preparation apparatus, and belongs to the anhydrous sodium sulfate preparation field. The method sequentially comprises the following steps: processing a raw sodium sulfate solution to prepare a fine sodium sulfate solution; dehydrating the fine sodium sulfate solution to prepare dry sodium sulfate; and processing the dry sodium sulfate to prepare finished sodium sulfate. The preparation apparatus comprises a nitrate solution reaction clarifier, a slurry clarifier, a non-valve filter, a rotary drum vacuum filter, a fine sodium sulfate solution storage device, a steam generation device, a multiple-effect evaporator, a centrifuge, an atmospheric condenser, a cooling tower, a cycle water pump, a Roots water ring vacuum set, a hot air drying device, a convey device, a pneumatic elevator, a nitrate storage bin and a cloth bag deduster. According to the invention, the sodium sulfate solution refining efficiency is high, the sodium sulfate solution quality is good, and the sodium sulfate solution is fully recycled; and the heat energy utilization rate in the production process is high, the production energy consumption is low, and the finished sodium sulfate has a fast convey speed and a high output.

The invention discloses a method for heightening two-stage roasting arsenic collecting efficiency and special equipment. The method comprises the following steps: furnace gas, which is generated by one-stage roasting, is dedusted by means of reducing temperature through a two-stage whirlwind furnace cooler, and is again dedusted by means of removing electricity with furnace gas which is generated by two-stage roasting and be dedusted by means of reducing temperature through a one-stage whirlwind furnace cooler; the temperature of the dedusted furnace gas is reduced through a quench tower, and the arsenic of the dedusted furnace is recycled through a cloth bag arsenic collector; the remaining furnace gas is used for producing aid; and the dust and roasting slag, which are collected by the furnace cooler by means of the one-stage roasting, are put into the two-stage roasting. The equipment comprises a one-stage roasting furnace (1) and a two-stage roasting furnace (5). The equipment is characterized in that the one-stage roasting furnace (1) is connected with the two whirlwind devices and the furnace cooler by means of sealing in sequence; the bottom end of the one-stage roasting furnace (1) is communicated with the two-stage roasting furnace (5); the two-stage roasting furnace (5) is connected with one of the whirlwind devices and the furnace cooler by means of sealing in sequence; the bottom of the two-stage roasting furnace (5) is connected with a water quenching system; and the furnace cooler is communicated with an electric deduster (8), a cold collecting tower (9) and a cloth bag arsenic collecting device (10) in sequence. The invention has high arsenic collecting efficiency, does not frequently stop vehicles to clean the cloth bag, and increases productivity effect.

The invention discloses a method for improving the efficiency of a gas drainage liquid ring vacuum pump through a macromolecular drag reduction agent, and belongs to methods for improving the efficiency of liquid ring vacuum pumps. The method comprises the steps that the quantitative macromolecular drag reduction agent is prepared and poured into a circulating pool continuously through a drag reduction agent filling machine till the optimal drag reduction concentration is reached; the gas drainage liquid ring vacuum pump is operated, and the macromolecular drag reduction agent serves as a working medium of the liquid ring vacuum pump to conduct gas drainage; and the viscosity and the liquid level of the drag reduction agent as well as the operation performance of the gas drainage liquid ring vacuum pump are monitored in real time, accordingly, the quantitative drag reduction agent is supplemented in the fixed time, and the drag reduction performance and the liquid level of the drag reduction agent are maintained. The macromolecular drag reduction agent is a polyacrylamide solution with the concentration being 0.1-0.5%. Through the method, the efficiency of the liquid ring vacuum pump can be substantially improved, operation energy consumption can be reduced, and the maintenance period and the service life of the liquid ring vacuum pump are obviously prolonged.

The invention discloses a 660MW-grade primary intermediate reheat extraction steam turbine unit relating to an extraction steam turbine unit and aims at solving the problems of high net coal consumption rate, low energy utilization rate and pollutant discharge increment of the existing thermal power generating unit equipment. A front bearing box, a high-medium-pressure cylinder, a 2 # bearing box, a low-pressure cylinder and a 3# bearing box are sequentially arranged; two high-pressure main steam regulating valves and two medium-pressure reheat regulating combined valves are respectively located at the left and right sides of the high-medium-pressure cylinder; and middle-row steam is introduced to the low-pressure cylinder through a communicating pipe. Due to the adoption of a communicating pipe structure with a hydraulic control butterfly valve, double steam extraction openings are formed in the lower part of the middle row of the high-medium-pressure cylinder, so that the steam extraction capacity can be regulated to be high enough, and furthermore heating demands in winter can be met. The 660MW-grade primary intermediate reheat extraction steam turbine unit is ultra-supercritical and has the advantages of primary intermediate reheat, single shaft, two-cylinder and two-row steam, double extraction, eight-stage back-heating steam extraction and steam condensation. The 660MW-grade primary intermediate reheat extraction steam turbine unit is suitable for pure-condensation power generation in a non-heating period and combined heat and power generation in a heating period.

The present invention relates to an evacuation tube. It includes the following several portions: sleeve, piston placed in the sleeve, tube mouth, pulling rod and handle. Besides, it also includes an air-resisting piece. Said invention is simple in structure, and can quickly evacuate the package container.

The invention discloses a vacuum pump with a special-shaped cavity; the vacuum pump comprises a stator and a rotor; wherein the stator is a cylinder body provided with a special-shaped cylindrical-surface inner cavity, an inlet and an outlet; the special-shaped cylindrical-surface inner cavity is formed by two arc surfaces and two non-arc surfaces; the rotor is formed by a rotor body and two pairs of combination slide plates; the rotor body is a circular cylinder body provided with a transmission shaft, a centering shaft and a crossed guide groove; the two pairs of combination slide plates are vertically arranged in the guide groove; a cover plate is a flat plate provided with a bearing hole; the two end faces of the stator are matched with the cover plate to form into a sealing cavity; the rotor is matched with the bearing hole on the cover plate by the transmission shaft and the centering shaft; the external drive couple drives the rotor to rotate by the transmission shaft. When the rotor rotates, the combined arc surface of the special-shaped cylindrical-surface inner cavity matches with the rotor to control the two pairs of combination slide plates to slide alternatively to intake air through the inlet and press air out through the outlet, thereby forming negative pressure in the inlet area.

The invention relates to a control system, which is characterized in that a concrete pump drives a reversing electromagnetic valve of a cylinder to reverse after time is delayed for 500ms to 1000ms when the reversing electromagnetic valve receives a signal transmitted from a magnetic switch, an emergency pumping power control oil inlet port is connected with an emergency arm support operation preselector valve, a port P of the emergency arm support operation preselector valve is connected with a diesel driving high-pressure water pump preselector valve, a motor normal driving arm support, a supporting leg and cable reel operation function control oil inlet port, a port P of the diesel driving high-pressure water pump preselector valve is connected with a steering priority control valve, a port P of the steering priority control valve is connected with a brake priority control valve, and a port P of the brake priority control valve is connected with a hydraulic oil pump which is arranged on a chassis and used for controlling braking and steering functions. In another technical scheme, the invention provides self-travelling construction machinery with the control system. The control system and the self-travelling construction machinery meet requirements of concrete pumping, simultaneously are simple in structure of mechanisms, and save cost.

The invention provides a pressure control system comprising a vacuum chamber, an air source, multiple grades of vacuum pump groups and a control unit. The vacuum chamber communicates with the air source through an intake pipeline. The intake pipeline is provided with an intake valve. The vacuum chamber communicates with the multiple grades of vacuum pump groups through an exhausting pipeline. A high vacuum valve is arranged on the exhaust pipeline. The intake valve, the high vacuum valve and the multiple grades of vacuum pump groups are connected with the control unit. The control unit controls the pumping speeds of the multiple grades of vacuum pump groups according to the target control pressure, so that pressure adjustment in a vacuum furnace is achieved. The invention provides a pressure control method. The pressure control method comprises the steps that the target control pressure is obtained; according to the target control pressure and a preset value, a high-pumping-speed pumpgroup and a low-pumping-speed pump group are controlled to started or stopped, if the target control pressure is higher than the preset value, the high-pumping-speed pump group is stopped, and the low-pumping-speed pump group is started, and if the target control pressure is lower than a preset value, the high-pumping-speed pump group and the low-pumping-speed pump group are both started. By the adoption of the pressure control system and the pressure control method, the change of the intake amount does not need to be changed, the cost is low, and the pressure control range is large.

The invention is mainly applied to the field of vacuum equipment and particularly relates to a novel vacuum compression system. The novel vacuum compression system comprises a motor. The motor is a double-shaft extension motor. One output end of the motor is connected with a vacuum pump A through a speed reducer A, and the other output end of the motor is connected with a vacuum pump B through a speed reducer B. The vacuum pump A and the vacuum pump B are both double-suction vacuum pumps. Air inlets of the vacuum pump A and the vacuum pump B communicate with air inlet pipes correspondingly. The two air inlet pipes communicate with a main air inlet of a vacuum system through an air inlet T-joint. Through the novel vacuum compression system, a vacuum unit can be made to operate at an optimum performance working point in a matched mode, and the technical requirements for the large air pumping amount are met. A driver and the pumps can be controlled through clutches. The air pumping amount can be increased when the two pumps operate in parallel. The compression ratio can be increased, and the air discharge pressure can be increased.

The invention discloses a gas compression pump with a special-shaped cavity. The pump comprises a stator and a rotor, wherein the stator is a cylinder with a special-shaped cylindrical surface inner cavity, an inlet and an outlet; the special-shaped cylindrical surface inner cavity is formed by combining two arc surfaces and two non-arc surfaces; the rotor consists of a rotor body and two pairs of combined sliding plates; the rotor body is a cylinder with a transmission shaft, a centering shaft and cross guide grooves; the two pairs of combined sliding plates are vertically arranged in the guide grooves; each cover plate is a flat plate with a bearing hole; the two end faces of the stator are matched with the cover plates to form a sealed cavity; the rotor is matched with the bearing holes in the cover plates through the transmission shaft and the centering shaft; an external driving couple makes the rotor rotate through the transmission shaft; and when the rotor rotates, the combined arc surfaces of the special-shaped cylindrical surface inner cavity are matched with the rotor, the two pairs of combined sliding plates are controlled to slide crosswise, gas is sucked into the inlet and pressed out of the outlet, and positive pressure is formed in an outlet area.

The invention relates to the field of lotus root digging machines and provides a novel lotus root digging machine water pump. The novel lotus root digging machine water pump is characterized by comprising a pump body, a water drawing pipe and a water outflow pipe; the water drawing pipe comprises a main water drawing pipe body and auxiliary water drawing pipe bodies, and the auxiliary water drawing pipe bodies are arranged on the main water drawing pipe body at a certain distance; a transmission shaft is arranged in the pump body, blades, filter nets, a partition plate, a primary impeller, a fixed supercharging disc and a secondary impeller are sequentially arranged on the transmission shaft in the water inflow direction, the filter nets are connected with the partition plate, the primary impeller is arranged in the fixed supercharging disc, the secondary impeller is arranged on the water outflow side of the fixed supercharging disc, and a first bearing, a second bearing, a shaft sleeve and an oil seal are arranged on the transmission shaft; a water channel is formed in the pump body and connected with the water outflow pipe; an auxiliary water drawing pipe body support is 1/4 of the main water drawing pipe body, a user can select the proper water drawing pipe bodies according to the water level of a lotus root field, when one water drawing pipe body is blocked, due to the water pressure difference, water in the main water drawing pipe body can flow into the auxiliary water drawing pipe bodies, the blockage position is burst through, and the purpose of automatically clearing away blockage objects is achieved.

The invention relates to an improved slide-valve Roots vacuum unit, which comprises a pump body, a pair of rotors and a pair of shafts, wherein the rotors and the shafts are arranged in the pump body, and the rotors are meshed. The improved slide-valve Roots vacuum unit is characterized in that the top part of the pump body is provided with an air inlet; the bottom part of the pump body is provided with an air outlet; the bottom part of the pump body is connected with a slide-valve pump through a corrugated pipe; the top part of the slide-valve pump is provided with a cooling water control device; the slide-valve pump is communicated with the cooling water control device; a rotating shaft, an eccentric wheel, a slide valve and an air release valve are arranged in the slide-valve pump; the eccentric wheel is arranged outside the rotating shaft; and the slide valve is arranged outside the eccentric wheel. The improved slide-valve Roots vacuum unit has the advantages of simple structure, high vacuum degree, high efficiency, energy conservation, high sucking rate and stable performance. Besides, the improved slide-valve Roots vacuum unit is easy to start at ordinary pressure, simple in maintenance and convenient for use.

The invention discloses a smoke alarm for a ship. The smoke alarm comprises a remote second fire alarm controller which is used for controlling a cargo hold, wherein the remote second fire alarm controller is arranged in a CO2 chamber. The invention further discloses an alarm system of the smoke alarm for the ship. The alarm system further comprises a third fire alarm controller used for controlling a cabin and a first fire alarm controller used for controlling a living area, wherein the third fire alarm controller and the second fire alarm controller are connected with the first fire alarm controller. The invention further discloses an alarm method of the smoke alarm for the ship and an alarm method of the alarm system of the smoke alarm for the ship. According to the smoke alarm for theship, the alarm system and the alarm methods thereof, a first smoke detection box is placed in the safe cargo hold, so that the installation of a first sampling pipeline is not limited by space, the first smoke detection box can be connected to the first sampling pipeline with the pipe diameter of DN20-150, the first sampling pipeline is not prone to block, the air sucking amount is large, the airsuction is rapid, and the fire alarm response time is short.