54results about How to "Safe, stable and reliable work" patented technology

The invention relates to an equal-current synthetic high-power constant current power supply circuit, which belongs to the fields of electronic industry and optical communication. The circuit comprises a voltage reference circuit, a final driving circuit, a soft-start circuit, an anti-surge circuit, a modulation input circuit, a feedback control circuit, a current driving circuit and a control switch; the final driving circuit comprises high-power semiconductor devices and equal-current resistors which are connected in parallel, the equal-current resistors are respectively and correspondingly connected in series with drains of the high-power semiconductor devices, output current generated by the high-power semiconductor devices is merged and then flows through a sampling resistor; and the drains of the high-power semiconductor devices are respectively connected with a cathode of a semiconductor laser, and sources of the high-power semiconductor devices are connected with the sampling resistor. The circuit has the advantages of greatly enhancing the stability of the current output by a high-power semiconductor laser driver, enabling the current that flows through each MOS tube to be basically equal by adopting the equal-current technology, and greatly enhancing the reliability of a power supply in a high-load working state.

The invention discloses a double-piston electro-rheological shock absorber which has a continuously adjustable damping function and is mainly used for semi-active control over a vehicle suspension system. The double-piston electro-rheological shock absorber mainly comprises a piston, an annular piston, an inner barrel, an outer barrel, a general valve, a tapered gap, a plenum chamber and a positive plate, the inner barrel is completely divided into an upper working cavity and a lower working cavity through the piston, the upper working cavity is filled with general hydraulic oil, the hydraulic oil flows between the inner barrel and an annular cavity through the general valve, the lower working cavity is filled with electro-rheological fluid, the electro-rheological fluid flows between the inner barrel and the annular cavity through the tapered gap, and the optimal damping force needed for the shock absorber is generated by the tapered gap and the general valve. The shock absorber is provided with a floating piston, so that changes, caused by a piston rod in the moving process, of the volume of the oil in the upper working cavity are made up for in the working process of the shock absorber; the bottom of the shock absorber is provided with the tapered gap, controllable damping force is provided, and meanwhile sediment of the electro-rheological fluid can be rapidly removed in the working process.

The invention provides a constant temperature and humidity power transformation cabinet which comprises a cabinet body, a temperature regulation module, a humidity regulation module and a control module. The cabinet body is of a sealing structure formed by a first side wall, a second side wall, a third side wall, a door, a top plate and a bottom plate; the first side wall, the second side wall and the third side wall are respectively of a hollow structure; a first multi-way pipe is arranged in the top plate, and a second multi-way pipe is arranged in the bottom plate; cooling liquid is injected into a first side wall inner cavity, a second side wall inner cavity, a third side wall inner cavity, the first multi-way pipe and the second multi-way pipe; the temperature regulation module comprises a circulating pump, a refrigerating plant and a temperature sensor; the humidity regulation module comprises a first air pipe, a second air pipe, a first draught fan, a second draught fan and a first humidity sensor; the control module is respectively connected with the circulating pump, the refrigerating plant, the temperature sensor, the first draught fan, the second draught fan and the first humidity sensor. Thus, the problems that heat dissipation is difficult and damp is prone to accumulation of the power transformation cabinet are solved.

The invention relates to a spin forming device with an internal and external boss belt pulley, which comprises a worktable (2), an upright post (5) arranged on the worktable (2), upper and middle plates (7) and (8) which are connected with the upright post (5) in turn, a primary oil cylinder (6) arranged on the upper plate, an upper spindle (4) connected with the primary oil cylinder (6), a lower spindle (3) and an ejecting oil cylinder (11), wherein the lower spindle (3) and the ejecting oil cylinder (11) are arranged on the worktable (2). The spin forming device also comprises spinning tool component (9 and 10) which are arranged on two sides respectively, wherein the component on each side comprises a side cylinder plate (102) and a side cylinder (101); the horizontal guide post (103) of the side cylinder plate (102) is connected with a sliding plate (104); a vertical guide post (109) is arranged in the middle of the sliding plate and is connected with a fixed bracket (108) and a tool holder (106); a tool (107) is arranged in the tool holder (106); and under the action of the side cylinder (101) and a vertical oil cylinder (105), the tool move up and down as well as left and right so as to spin a workpiece on the lower spindle. The device overcomes the drawbacks of material waste, high energy consumption and low efficiency and the like of the conventional processes such as forging, turning and the like. The produced products have the advantages of high precision, high physical and mechanical performance and the like.

The invention discloses a frequency-conversion traction equipment energy-saving system for an elevator, The system comprises a DC / DC module A, a super capacitor assembly, a DC / DC module B, a detection control module, an auxiliary power supply and a DC / AC module that are connected with a frequency converter; the DC / DC module A is connected with the super capacitor assembly; the super capacitor assembly is respectively connected with the DC / DC module B and the DC / AC module; a control module used for detecting the terminal voltage of the super capacitor assembly is connected with the DC / DC module A and the DC / DC module B; and the detection control module for controlling the operation of the AC / AC module and the auxiliary power supply is connected with the DC / AC module and the auxiliary powersupply. By using one set of super capacitor assembly, the frequency-conversion traction equipment energy-saving system lowers the manufacturing cost of products and simultaneously avoids the interference of high-order harmonic on a power grid, therefore the system can work more stably and reliably; and by adoption of the system, the running energy consumption of the elevator can be saved by more than 30 percent, and the energy-saving effect is obvious.

The present invention proposes a ventilated and dust-proof power distribution cabinet, which includes a cabinet body and a controller. The first vertical plate and the second vertical plate divide the inside of the cabinet body into a first chamber, a second chamber and a third chamber in sequence. The horizontal board divides the second chamber into an electrical chamber and an air chamber. The electrical chamber is provided with a third vertical board. The third vertical board divides the electrical chamber into a first installation chamber and a second installation chamber. The first installation chamber is equipped with There is a first temperature sensor, a second temperature sensor is arranged in the second installation chamber, a plurality of third ventilation holes connecting the first installation chamber and the air chamber, and a plurality of third ventilation holes connecting the second installation chamber and the air chamber are distributed on the horizontal plate. For the fourth ventilation hole, first valves are respectively arranged in the plurality of third ventilation holes, second valves are respectively arranged in the plurality of fourth ventilation holes, and a cold wind generating device is arranged in the air chamber. According to the temperature data detected by the first temperature sensor and the second temperature sensor, the controller of the present invention controls the operation of the cold wind generator, the first valve and the second valve to ventilate and dissipate heat from the cabinet.

The invention provides a damp-proof type power transformation cabinet. The damp-proof type power transformation cabinet comprises a cabinet body, a ventilation module, a radiating module, and a control module, wherein a device for electric energy conversion and transmission is installed in the cabinet body, an air inlet and an air outlet are formed in the cabinet body, the ventilation module comprises a first fan, a second fan, a dehydrating breather, an air supply pipe and an air exhaust pipe, the radiating module is installed in the cabinet body and used for reducing temperatures in the cabinet body, the control module comprises a first humidity sensor, a second humidity sensor, an early warning unit and a control unit, and the control unit is respectively connected with the first humidity sensor, the second humidity sensor, the first fan, the second fan, the dehydrating breather and the early warning unit and controls the first fan, the second fan, the dehydrating breather, and the early warning unit to work according to detection data from the first humidity sensor and the second humidity sensor. The damp-proof type power transformation cabinet is capable of automatically dehumidifying the inside of the power transformation cabinet, preventing devices in the power transformation cabinet from being eroded by humidity, and guaranteeing work reliability.

The invention provides an underground pipeline monitoring system and method based on distributed optical fiber sensing. An armored photoelectric composite cable arranged on the outer side of an underground pipeline , a high-resolution optical camera with a night vision function and mounted along an underground pipeline, and an automatic monitoring and early warning system and a DSS / DTS / DAS composite distributed optical fiber sensing modulation and demodulation instrument which are arranged in a monitoring station along the line are used to construct a long-term real-time monitoring system forthe temperature, vibration and strain distribution change along the underground pipeline based on distributed optical fiber sensing. Real-time effective anti-theft, anti-excavation damage, fireproof,anti-natural and geological disaster early warning monitoring is carried out on underground pipelines and oil and gas conveying pipelines; loss can be effectively avoided or reduced; long-term stable,safe and reliable work of the underground pipelines is guaranteed; and indispensable means, systems and methods are provided for scientific management of the underground pipelines and improvement ofthe use efficiency.

The invention comprises a valve body and main and bypass channel cavities formed on the valve body. The main channel cavity includes an inlet and an outlet and the bypass channel cavity has an outlet. A valve clack following a valve stem moves longitudinally in the valve body. In the bypass channel cavity is disposed a cage-type valve seat with several throttle orifices on the cylinder wall of the valve clack. At the bottom of the valve seat is disposed a seal seat fit with the valve clack and on the top of the valve seat is fixed a valve cover. The valve extends through the valve cover.

The invention relates to an internal combustion engine power intensifying device. A work environment intensifying system for an engine cylinder piston of a piston reciprocating internal combustion engine comprises a power mechanism and an engine cylinder of the internal combustion engine, wherein the power mechanism is a rack and gear mechanism, tappets and the engine cylinder piston are fixedly arranged at the upper end of a pressurizing frame of the rack and gear mechanism and drive all working mechanisms to act, a pressure cylinder piston is fixedly arranged at the lower end of the pressurizing frame, and the engine cylinder piston and the pressure cylinder piston perform synchronous movement and are same in stroke. Mechanical strength of the tappets is increased with bearing system heeling force as the datum, all the tappets penetrate through a diaphragm plate of an engine body and are in slide fit with the diaphragm plate in an attached mode, the length of the engine cylinder piston is the sum of the piston stroke and the length of a sector of a piston ring, and cooling fins are arranged at the positions, opposite to the outer wall face of a combustion chamber on the piston top face, in an inner cavity of the engine cylinder piston. The work environment intensifying system for the engine cylinder piston of the piston reciprocating internal combustion engine eliminates harm of the system heeling force and thermal loads of a piston set, and substantially reduces the friction, in an engine cylinder, of a conventional internal combustion engine piston.

The invention provides a downhole strain distribution monitoring system based on distributed optical fiber sensing and a monitoring method of the downhole strain distribution monitoring system based on distributed optical fiber sensing. Armored optical cables are bound to the outside of sleeves of vertical wells, inclined wells or horizontal wells and are permanently fixed with cementing cement, the armored optical cables are bound and fixed to the outside of a coiled tubing by a metal clip, a long-term strain monitoring and sensing unit for oil and gas production wells, water injection wellsand monitoring or observation wells is constructed, the long-term strain monitoring and sensing unit and a distributed strain sensing and distributed temperature sensing (DSS / DTS) composite modulationand demodulation instrument near a wellhead together form the downhole strain distribution change dynamic monitoring system based on distributed optical fiber sensing and the monitoring method, the long-term stable, safe and reliable work of the oil and gas production wells, the water injection wells and the monitoring or observation wells can be effectively ensured, and the indispensable means,system and method are provided for scientific management of oil and gas reservoirs and enhanced recovery efficiency.

The invention brings forward a self-controlled temperature type power transformation cabinet. The internal portion of a main body is provided with a vertical division plate; the vertical division plate divides the main body into a first installation cavity and a second installation cavity; the vertical division plate is provided with a plurality of ventilation holes connecting the first installation cavity and the second installation cavity; a first cover plate and a second cover plate are matched with openings in the two ends of the main body to seal the main body; the first cover plate is provided with a first opening and a first air outlet; a first draught fan is arranged in the first opening; a second valve is arranged in the first air outlet; the second cover plate is provided with a second opening and a second air outlet; a second draught fan is arranged in the second opening; a third valve is arranged in the second air outlet; and a controller controls the first draught fan, the second draught fan, the first valve, the second valve and the third valve to work according to detection signals of a first temperature sensor, a second temperature sensor, a first humidity sensor and a second humidity sensor. The power transformation cabinet of the invention can realize automatic adjusting of the temperature and humidity inside the power transformation cabinet so as to facilitate stable, reliable and safe working of the power transformation cabinet.

The invention provides a step-down direct current switch voltage-stabilized source and a voltage stability control method. The step-down direct current switch voltage-stabilized source comprises an input filter circuit, a Bosst step-down circuit and an output filter circuit which are connected in sequence, and also comprises a control module connected with the Bosst step-down circuit and a load and a constantan wire which are serially connected with the output filter circuit, wherein an AD sampling port is arranged between the load and the constantan wire; the input filter circuit is used for filtering input voltage DC, the output filter circuit is used for filtering output voltage, and the control module is used for controlling the step-down output of the Bosst step-down circuit. According to the direct current voltage-stabilized source circuit and the voltage stability control method provided by the invention, voltage stability output is realized, and the step-down direct current switch voltage-stabilized source has the advantages of reliable closed-loop control, small output voltage deviation, small voltage regulation factor and high power supply conversion efficiency, so that input voltage, output voltage and output current can be displayed.

The invention provides a constant temperature and humidity power transformation cabinet which comprises a cabinet body, a temperature regulation module, a humidity regulation module and a control module. The cabinet body is of a sealing structure formed by a first side wall, a second side wall, a third side wall, a door, a top plate and a bottom plate; the first side wall, the second side wall and the third side wall are respectively of a hollow structure; a first multi-way pipe is arranged in the top plate, and a second multi-way pipe is arranged in the bottom plate; cooling liquid is injected into a first side wall inner cavity, a second side wall inner cavity, a third side wall inner cavity, the first multi-way pipe and the second multi-way pipe; the temperature regulation module comprises a circulating pump, a refrigerating plant and a temperature sensor; the humidity regulation module comprises a first air pipe, a second air pipe, a first draught fan, a second draught fan and a first humidity sensor; the control module is respectively connected with the circulating pump, the refrigerating plant, the temperature sensor, the first draught fan, the second draught fan and the first humidity sensor. Thus, the problems that heat dissipation is difficult and damp is prone to accumulation of the power transformation cabinet are solved.

The invention relates to a hydraulic press pump controlled hydraulic system with renewable power generation and aims at solving the problems of the traditional hydraulic press pump controlled hydraulic system of high power consumption, strong system impact vibration, high failure rate, low production efficiency and low energy utilization ratio without full utilization of compression energy. The hydraulic press pump controlled hydraulic system with renewable power generation is characterized in that a reversible variable axial plunger pump is installed between a main working cylinder and return cylinders; a liquid supply pump is connected with the main working cylinder through a first check valve and the reversible variable axial plunger pump through a second check valve and directly controls the main working cylinder and the return cylinders to drive a moving beam of a hydraulic press to move through the reversible variable axial plunger pump; and a regenerative power generation system is connected to the reversible variable axial plunger pump through a coupler. The hydraulic press pump controlled hydraulic system has the beneficial effects that the response speed of the system is rapid, the control accuracy is high, no impact vibration occurs in the pressure and charge relieving process of the main working cylinder, and thus impact vibration of the system is eliminated; and in addition, the compression energy of hydraulic oil of the hydraulic press can be converted to electric energy, or stored for recycling or directly supplied to other electric servo motors, so that the energy saving effect is remarkable.

The invention relates to a spin forming device with an internal and external boss belt pulley, which comprises a worktable (2), an upright post (5) arranged on the worktable (2), upper and middle plates (7) and (8) which are connected with the upright post (5) in turn, a primary oil cylinder (6) arranged on the upper plate, an upper spindle (4) connected with the primary oil cylinder (6), a lowerspindle (3) and an ejecting oil cylinder (11), wherein the lower spindle (3) and the ejecting oil cylinder (11) are arranged on the worktable (2). The spin forming device also comprises spinning toolcomponent (9 and 10) which are arranged on two sides respectively, wherein the component on each side comprises a side cylinder plate (102) and a side cylinder (101); the horizontal guide post (103) of the side cylinder plate (102) is connected with a sliding plate (104); a vertical guide post (109) is arranged in the middle of the sliding plate and is connected with a fixed bracket (108) and a tool holder (106); a tool (107) is arranged in the tool holder (106); and under the action of the side cylinder (101) and a vertical oil cylinder (105), the tool move up and down as well as left and right so as to spin a workpiece on the lower spindle. The device overcomes the drawbacks of material waste, high energy consumption and low efficiency and the like of the conventional processes such as forging, turning and the like. The produced products have the advantages of high precision, high physical and mechanical performance and the like.

An elevator variable-frequency traction equipment energy saving system using a bidirectional DC (direct current)-DC module is characterized by comprising a super capacitor module, a working power supply, a sampling module, the bidirectional DC-DC module and a DC / AC (alternating current) inversion module; the working power supply and the sampling module are connected with a frequency converter respectively; the bidirectional DC-DC module is connected with the working power supply, the sampling module, the supper capacitor module and the DC / AC inversion module; the supper capacitor module is connected with the working power supply and the sampling module. The elevator variable-frequency traction equipment energy saving system has the advantages that a supper capacitor component, an inductor and a capacitor are used for forming a low-pass filter (the inductor mainly used for energy storage is a significant component of a switching power supply toppling structure, and the capacitor is mainly used for voltage ripples), so that the interference to a power grid due to ultraharmonics is avoided, and the elevator variable-frequency traction equipment energy saving system works more safely, stably and reliably.

The invention discloses a hydraulic station for a large-tonnage press machine. The hydraulic station comprises an oil tank, a liquid level and temperature meter, a confluence pipe, a filter, a power system, a hydraulic block set, a hydraulic valve set, an energy accumulator system and an oil pipe system, the liquid level and temperature meter is arranged on the left wall of the oil tank, the filter is arranged on the front wall of the oil tank, the energy accumulator system is arranged on the right wall of the oil tank, the power system, the hydraulic block set and the oil pipe system are distributed and arranged above the oil tank, a hydraulic pump is arranged above a motor and communicates with the oil tank and the hydraulic block set through the oil pipe system, the hydraulic valve setis arranged on the periphery of the hydraulic block set, the input end of the hydraulic block set communicates with the hydraulic pump through the oil pipe system, the output end of the hydraulic block set communicates with the confluence pipe, the energy accumulator system and the oil tank through the oil pipe system, input and output of the energy accumulator system share one end, and the energyaccumulator system communicates with the hydraulic block set and the confluence pipe through the oil pipe system. The hydraulic station has the main characteristics that the bearing capacity is large, and the hydraulic station is suitable for the press machine with the relatively large tonnage requirement; and in addition, the hydraulic station further has the advantages that the pressure loss ismall, integrated control is facilitated, the work is stable, safe and reliable and the like.

The invention belongs to the technical field of machinery, and provides a pushing device for the inside and outside direction and the rotary direction of a tool in a gear processor. The pushing device comprises a lead screw, a tool apron, a sliding plate, a motor and a nut seat, wherein the sliding plate and the nut seat are fixedly connected; the tool apron is installed on the sliding plate; the nut seat is arranged on the left part of the lead screw and is meshed with the lead screw; the right part of the lead screw is fixedly connected with the output shaft of the motor; the sliding plate is also provided with a worm gear and a worm; and the worm gear and the worm are meshed and drive the sliding plate to rotate. The pushing device has the advantages that the lead screw drives the sliding plate to move along the inside and outside direction, and the worm gear and the worm drive the sliding plate to rotate so as to drive the tool to process the gear. The whole device is stable, safe and reliable to work and is favorable for improving the machining precision of the gear, components have compact layout, and the technical defect in the prior art can be overcome.

A bi-stable three-way valve comprises a water tank, a buoy and a three-way valve. The buoy is arranged in the water tank, the three-way valve is communicated with the water tank, a magnetic ring assembly connected with the upper end of a three-way valve spool is further disposed in the water tank, and comprises an outer magnetic ring and an inner magnetic ring, the outer magnetic ring is arranged on the inner wall of a cylinder, the inner magnetic ring is arranged in the cylinder, the inner magnetic ring and the outer magnetic ring are arranged in a like polarity manner, a draw bar is connected to the upper end of the magnetic ring assembly, moves up and down along with ascending and descending of the buoy, and pulls the outer magnetic ring or the inner magnetic ring to generate magnetic repulsive force, the three-way valve spool is driven by the magnetic repulsive force to move up and down in the three-way valve, and valve plugs which are respectively arranged at the upper end and the lower end of the three-way valve spool simultaneously open or close an upper water inlet and a lower water inlet. Buoyancy of the buoy in the existing water tank is converted into the magnetic repulsive force of the inner magnetic ring and the outer magnetic ring, and the magnetic repulsive force is further converted into force for driving the three-way valve spool to move up and down in the valve, so that the valve plugs which are respectively arranged at the upper end and the lower end of the valve spool can open the upper water inlet and close the lower water inlet simultaneously or close the upper water inlet and open the lower water inlet simultaneously when acting, stable, safe and reliable operation of a circulating water supply system of a water boiler is kept, and energy consumption is reduced.

The invention discloses a visual intercom operation system and operation method based on smart furniture, and the visual intercom operation system comprises a base, the base is internally provided with a suspension cavity, the suspension cavity is internally provided with a cushion in a sliding manner, the base is internally provided with a pushing oil cylinder, and the pushing oil cylinder is internally provided with a pushing piston in a sliding manner. An ejector rod fixedly connected with the cushion is arranged at the top end of the pushing piston, and a lifting oil cylinder is arranged at the bottom end of the pushing oil cylinder. The visual intercom operation system is simple in structure, convenient to operate and maintain and safe, stable and reliable during working, a user does not need to operate the intelligent furniture, the intelligent furniture can automatically make corresponding behaviors according to the visual intercom operation system, then the happiness of the user is improved, and the visual intercom operation system can be automatically stored and folded and automatically returns to a fixed position when not used by the user. The occupied space volume is reduced, the use space in a house is saved, the space utilization rate of the house is improved, and the situation that the advancing road of family members is blocked is avoided, so that the visual intercom operation system has high use and popularization value.

The invention provides a transverse moving device in a gear machining machine, which belongs to the technical field of machinery. The transverse moving device in the gear machining machine comprises a machine body and a driving mechanism, wherein a guide rail in the X axis direction, and a slide block sliding along the guide rail under the driving of the driving mechanism are installed on the machine body; a worktable is driven by the slide block; the driving mechanism comprises a screw rod, a fixing base and a motor; the slide block is sleeved at one end of the screw rod and meshed with the screw rod; and the other end of the screw rod is inserted into the fixing base and connected with an output shaft of the motor. The transverse moving device in the gear machining machine has the advantages that the screw rod is driven by the motor to drive the slide block to move along the guide rail, and the worktable moves along the X axis direction; the tightness of a gap between deep-groove ball bearings is regulated by a locking nut, so that the whole transverse moving device works stably, safely and reliably and the gear machining precision can be improved; components are compact; and defects in the prior art are overcome.

The invention belongs to the technical field of machinery and provides a cutter driving device in a gear processing machine. The cutter driving device comprises a cutter holder, a main shaft and a driving mechanism, wherein the main shaft is arranged in the cutter holder, the driving mechanism drives the main shaft to do rotational motion, multiple groups of angular contact bearings are arranged between the front end part in the cutter holder and the main shaft, the angular contact bearings and the main shaft are in angular contact, the edges of the angular contact bearings are provided with adjusting parts used for adjusting gaps among the angular contact bearings along the axial direction of the main shaft, and a cylindrical roller bearing is arranged between the rear end part in the cutter holder and the main shaft. The cutter driving device provided by the invention has the advantages that two types of bearings are combined and arranged so that the main shaft jumps in a small range, a rolling fit manner is adopted to ensure the reliable and high-speed operation of the main shaft, and a problem caused by temperature can be well controlled by adjusting elasticity of the gaps among the angular contact bearings by locking nuts, thus the main shaft is ensured to operate stably, safely and reliably, and processing accuracy and efficiency of a gear are improved.

The invention relates to an oil decanting system for an oil stain boasting and an oil water chamber, which belongs to the field of vessel sewage treatment and environment protection. The oil decanting system of the oil stain boasting and the oil water chamber adopts a hydraulic device and each hydraulic remote value is provided with a tee and double-position electromagnetic valve. The electronic unit controls the tee and double-position electromagnetic valve according to a set parameter in a storage device based on the input signal of an oil-water interface meter and a liquid level meter. When the tee and double-position electromagnetic valve opens the corresponding hydraulic control value, the polluted oil in the hydraulic oil floating on the surface of the oil stain water chamber flows to the oil stain chamber through an oil decanting filter. The oil decanting system has the advantages of low investment, energy saving, stable operation with safety and reliability, as well as a high automatic degree and convenient maintenance and management.

The invention relates to a driving circuit for a motor and a power supply. The driving circuit comprises a lightening protection circuit, an EMI filtering circuit, an input rectification circuit, a power factor correction circuit, a first output branch circuit and a second output branch circuit, wherein the first output branch circuit and the second output branch circuit are arranged in parallel;the lightning protection circuit releases and suppresses the energy of a lightning signal when the AC input end is struck by lightning; the EMI filtering circuit performs EMI filtering on an input ACsignal; the input rectification circuit receives the EMI filtered AC signal and carries out rectification to output a DC signal; the power factor correction circuit boosts the DC signal to output a boost signal; the first output branch circuit outputs a first output signal and adjusts the first output signal according to the feedback of the first output signal; and the second output branch circuitoutputs a second output signal and adjusts the second output signal according to the feedback of the second output signal. The driving circuit can provide safe and reliable power supply for the motorand the system, thereby ensuring stable and safe operation of equipment under different environmental conditions.

The invention discloses a construction system and a construction method for an all-glass curtain wall in a green building project, which comprises four groups of supporting shells uniformly arranged, the adjacent two sets of supporting shells are connected by cables, and the sliding parts on the cables are A working housing is provided, and a supporting cavity is provided in the supporting housing, and eight sets of rotatable rubber wheels are evenly provided on the end wall of the supporting housing near the glass curtain wall, thereby reducing the pressure of the system on the glass curtain wall , the support shell is symmetrically provided with pressing grooves at an angle of 45 degrees; the present invention is simple in structure, convenient in operation, convenient in maintenance, safe, stable and reliable in operation, and the staff does not need to climb to work, which greatly protects the personal safety of the staff , and the system works automatically during the working process, and can clean and maintain the four walls of the green building at the same time, and the cleaning and maintenance work can be carried out at the same time, which greatly improves the work efficiency, so the equipment has a high Use and promote value.

The invention relates to an oil decanting system for an oil stain boasting and an oil water chamber, which belongs to the field of vessel sewage treatment and environment protection. The oil decanting system of the oil stain boasting and the oil water chamber adopts a hydraulic device and each hydraulic remote value is provided with a tee and double-position electromagnetic valve. The electronic unit controls the tee and double-position electromagnetic valve according to a set parameter in a storage device based on the input signal of an oil-water interface meter and a liquid level meter. When the tee and double-position electromagnetic valve opens the corresponding hydraulic control value, the polluted oil in the hydraulic oil floating on the surface of the oil stain water chamber flows to the oil stain chamber through an oil decanting filter. The oil decanting system has the advantages of low investment, energy saving, stable operation with safety and reliability, as well as a high automatic degree and convenient maintenance and management.

The invention discloses an installation structure of a vehicle-mounted communication device, which comprises a fixed support base, a front panel, a status indicator light, a reset hole, a serial port interface, a local area network interface, a USB interface, a memory card socket, an identification module socket, a body, a rear The panel, power interface, external antenna interface, the fixed support base is locked with the body, and the fixed support base is located at the bottom of the body. The front panel is electrically connected, and the status indicator lights are provided in 2 parallel groups of 3 on the left end of the front panel. The reset hole is integrated with the front panel, and the reset hole is located on the right side of the status indicator light. The car vibrates when driving on bumpy roads, but the equipment can be in a safe and reliable working state, and the equipment can be in a stable state to improve the comfort of use.

The invention discloses a fixing method for motor winding end phase insulation pieces for a refrigeration compressor. A lashing band with good insulating performance is used for lashing phase insulation pieces on the winding end portion, wherein the phase insulation pieces are inserted into a winding and arranged between phrases; the phase insulation pieces are fixed between the phases of the winding and can not slip or shift easily; and therefore a motor can work in the refrigeration compressor safely, stably and reliably. The fixing method for the motor winding end phase insulation pieces for a refrigeration compressor is simple, convenient to operate, and good in practicality, and fixing of the phase insulation pieces of the motor winding is effectively achieved.