Patent application number | Description | Published |
20100147857 | SAFETY ENVIRONMENTAL PROTECTION BURIED OIL TANK - The present invention provides a safe and environmental protection type underground oil tank which has a tank body of two-layer structure composed of an inner tank wall and an outer tank wall; an interlayer formed between the inner tank wall and the outer tank wall; the separating explosion-proof materials respectively filled in the cavity of tank body and the interlayer formed between the two-layer tank walls; an oil leak detection device provided in the interlayer between the two-layer tank walls; as well as an oil spill pool established on the manhole cover of the tank body, the bottom of the oil spill pool being connected with the interlayer between the two-layer tank walls. Since the separating explosion-proof materials are provided in the oil tank, it is possible to prevent the accidental combustion and explosion accidents initiated by naked fire, static electricity, welding, gunshot, collision and misoperation, and thus ensure the intrinsic safety of oil tank. With the double walled tank structure, the oil tank may effectively overcome the leakage and/or leak of oil and gas and thus avoid serious damages to the soil around the gasoline filling station and destruction of underground water resources. At the same time, an oil leak detection device is provided in the cavity of the double walled tank, so that it is possible to detect the volatilization of oil and gas in time and thus make repairing welding the tank wall in case of charged oil. An oil spill pool is provided on the manhole of the tank body, so that it is possible to prevent such phenomena as oil spill and ebullition in the process of the oil filling and to adopt the countermeasures in time upon detection of such phenomena. | 06-17-2010 |
20100230002 | SAFE, ENVIRONMENTAL PROTECTION AND ENERGY-SAVING TYPE OIL-FILLING DEVICE - The present invention provides a safe, environmental protection, energy-saving type oil-filling device which at least consists of a double-wall oil-storage tank. The separating explosion-proof materials are respectively filled in the tank inner cavity and the tank wall interlayer. The oil outlet pipe of the oil-storage tank is connected with the oil-filling machine. A skid body is set up under the oil-storage tank and the oil-filling machine. A hood body is set up on the skid body. The oil-filling machine is a split type oil-filling machine, which consists of a digital electronic display, an oil pump case body and a filling gun. The digital electronic display and the filling gun are set up on the outer side of hood body wall. The oil pump case body is set up in the space formed by inside of the hood body and outside of the oil-storage tank and fixed on the skid body. The oil outlet pipe of the oil-storage tank is connected on the oil pump case body. The oil outlet hose on the oil pump case body is connected to the filling gun through the wall hole of the hood body. An oil gas recovery device is set up on the oil-storage tank, which consists of a breather valve set up on the oil-storage tank and connected with the oil-storage tank through a breather valve pipeline. A triple valve is mounted on the breather valve pipeline. One end of the triple valve is connected with the oil gas recovery hose. During the process of filling oil from the tank car to the oil-storage tank, the filler neck of the oil gas recovery hose is connected with the joint of the oil gas recovery hose of tank car. In the double-wall oil-storage tank of present invention, split type oil-filling machine is fixed on the skid body, and separating explosion-proof materials are filled in the tank wall interlayer and in the inner cavity, so that the floor area is greatly reduced and the intrinsic safety of oil-storage tank is guaranteed. The hood body on the skid body may be designed in diversified moldings and patterns according to the requirements of peripheral environment, so as to enhance the sense of safety. Since the arrangement of the oil gas recovery device the process of filling oil may achieve the enclosed recovery of oil gas, avoid the volatilization of oil gas in oil-storage tank and effectively reduce the contamination and damage to the atmosphere and saving the energy, thus the invention indeed realize the object of safety, environmental protection, energy conservation and decreasing of energy consumption. | 09-16-2010 |
20100233502 | EXPLOSION-PROOF MATERIAL AND ITS PROCESSING METHOD - The present invention provides an explosion-proof material which includes a flaky material ( | 09-16-2010 |
20110000909 | Explosion proof and environment protective oil (gas) refueling equipment - An explosion proof and environment protective oil (gas) refueling equipment includes an oil (gas) storage tank connected with a refueling machine. The inner chamber of the oil (gas) storage tank is filled with an explosion-proof material, which is a multi-layer material unit made of high porosity lamellar materials, with a fixed supporting part being set in this material unit for fixing and supporting the unit, a skid is set under the oil (gas) storage tank and the oil (gas) refueling machine. A plurality of said units is orderly installed in the inner chamber of the oil storage tank, with reasonable installing method and structure. With the fixed supporting part being installed in the unit, the explosion-proof material units have adequate strength and elasticity so as to effectively prevent the collapse and distortion of the high porosity lamellar material in the tank, thus the unexpected explosion hazards that may be caused by naked flame, static electricity, welding, gunshot, collision and faulty operation can be prevented and safety of oil (gas) refueling equipment can be ensured. The explosion-proof material unit being covered with a metal protective mesh which can effectively prevent scraps from getting into the medium in the tank and causing harmful effect on the content medium thereof. | 01-06-2011 |
Patent application number | Description | Published |
20130241461 | SINUSOIDAL MODULATION CONTROL METHODS AND CIRCUITS FOR PERMANENT MAGNET SYNCHRONOUS MOTORS - Disclosed herein are sinusoidal modulation control methods and circuits for PMSM. In one embodiment, a method can include: detecting rotor position information of the PMSM to obtain a rotor position signal and a rotor rotating speed measured value; comparing the rotating speed measured value against a reference rotating speed value to generate an error signal, and generating a first regulating voltage signal based on the error signal using a PI regulator; receiving the rotor position signal and the first regulating voltage signal, and generating a full-wave U-shaped modulation wave by using the rotor position signal as a time reference; generating a second U-shaped modulation wave by multiplying the full-wave U-shaped modulation wave with the first regulating voltage signal; comparing the second U-shaped modulation wave against a triangular wave to generate a PWM control signal that controls a switch of an inverter to regulate a current of the PMSM. | 09-19-2013 |
20140021879 | DIMMABLE LED DRIVER AND DRIVING METHOD - Disclosed are dimmable LED driver circuits and methods. A dimmable LED driver can include: an SCR, an electronic transformer, and a rectifier bridge to convert an AC voltage to a DC voltage signal; a power stage circuit that receives the DC voltage signal, and outputs a constant current to drive an LED load, where the power stage circuit includes first and second power stage circuits, the first power stage circuit receiving the DC voltage signal, and generating a first output voltage to the second power stage; and an input current control circuit that receives an input current of the first power stage circuit and the first output voltage, and generates a first control signal to control the input current as a square wave signal during an on time of the SCR, and the input current is substantially zero during an off time of the SCR. | 01-23-2014 |
20140062322 | CONTROLLED-SILICON ADAPTING LED DRIVING CIRCUIT, METHOD AND SWITCH MODE POWER SUPPLY - Disclosed are light-emitting diode (LED) driver circuits, methods, and a switch mode power supply. In one embodiment, an LED driver can include: (i) a silicon-controlled rectifier (SCR) and a rectifier bridge configured to receive an AC voltage, and to generate a phase-loss half sine wave voltage signal; (ii) a threshold voltage control circuit configured to receive a threshold voltage and an input voltage signal that represents the phase-loss half sine wave voltage signal, and to determine whether to output the threshold voltage based on angle information of the input voltage signal; (iii) a first control circuit configured to compare the input voltage signal against the threshold voltage output by the threshold voltage control circuit, and to generate a first control signal; and (iv) a power switch controllable by the first control signal to be off until an absolute value of the AC voltage is reduced to zero. | 03-06-2014 |
20140139129 | THYRISTOR DIMMING CIRCUIT WITH LOSSLESS DISCHARGING CIRCUIT AND METHOD THEREOF - Thyristor dimming circuits and methods are disclosed herein. In one embodiment, a thyristor dimming circuit can include: (i) a thyristor and a rectifier bridge configured to receive a sinusoidal AC voltage, and to generate a phase-loss input voltage; (ii) a power stage circuit configured to have the phase-loss input voltage applied thereto, the power stage circuit having a main switch and being configured to drive a lamp load through electrical conversion; and (iii) a discharging circuit configured, during a first predetermined time interval, to control the main switch to operate with a fixed duty cycle at a fixed frequency, where the first predetermined time interval begins prior to an absolute value of the sinusoidal AC voltage being reduced to zero, the first predetermined time interval ending when the phase-loss input voltage is again applied to the power stage circuit. | 05-22-2014 |
20140163910 | BATTERY POWER MEASURING METHOD, MEASURING DEVICE AND BATTERY-POWERED EQUIPMENT - Disclosed herein are various battery power measurement devices, methods, and related apparatuses. In one embodiment, a method of measuring a battery power can include: (i) detecting a voltage and a temperature at an output terminal of a battery; (ii) obtaining a first correction coefficient based on a battery open-circuit voltage at a previous sample time; (iii) obtaining a second correction coefficient based on the battery temperature; (iv) calculating a real-time battery open-circuit voltage by using the voltage at the output terminal of the battery, the first and second correction coefficients, the battery open-circuit voltage at the previous sample time, and a time interval between the previous sample time and a present sample time; and (v) converting the real-time battery open-circuit voltage into a battery power measurement for display. | 06-12-2014 |
20150078041 | HARMONIC CONTROL METHOD AND CIRCUIT FOR FLYBACK SWITCHING POWER SUPPLY - In one embodiment, harmonic control method for a flyback switching power supply, can include: (i) generating a sense voltage signal based on an output signal of the flyback switching power supply; (ii) generating a first compensation signal by determining and compensating an error between the sense voltage signal and a reference voltage; (iii) generating a second compensation signal by regulating the first compensation signal based on a duty cycle of a main power switch in the flyback switching power supply; and (iv) generating a control signal based on the second compensation signal and a triangular wave signal, to control the main power switch such that the output signal is substantially constant and an input current follows a waveform variation of an input voltage of the flyback switching power supply. | 03-19-2015 |
20150085537 | CONTROL METHOD, POWER CONVERTING CIRCUIT AND AC-DC POWER CONVERTER USING THE SAME - In one embodiment, a method of controlling an AC-DC power converter, can include: (i) receiving, by a filter capacitor, a first branch current from an input current of the AC-DC power converter; (ii) receiving, by a power converting circuit, a second branch current from the input current; (iii) receiving, by the power converting circuit, a feedback signal that represents an output signal of the power converting circuit, and a triangular wave signal that is determined by the first branch current; (iv) generating a first conduction time based on the feedback signal such that the power converting circuit produces a first converting current; and (v) generating a second conduction time based on the triangular wave signal such that the power converting circuit produces a second converting current having a same absolute value as the first branch current. | 03-26-2015 |