43results about How to "Avoid excessive pressure" patented technology

The invention provides a battery management device, a battery management method and a circuit applying the device. The battery management device comprises an analog-digital converter, a microcontroller, a voltage regulator and a control circuit. The analog-digital converter is connected with a plurality of batteries and used for performing analog-digital conversion on single battery voltage. The microcontroller is connected with the analog-digital converter and used for receiving and processing the single battery voltage output by the analog-digital converter. The voltage regulator is connected with a power supply, the analog-digital converter and the microcontroller and used for providing operation voltage for the analog-digital converter and the microcontroller. The control circuit is connected with the power supply and the voltage regulator and used for receiving control signals to control the voltage regulator to output operation voltage. The battery management device can be in a power-off mode, the cost is low, the power consumption is low, and the reliability is high.

The invention discloses a tilting type electric heating stockpot comprising a fixed base. A left box body is mounted at one end of the top surface of the fixed base; a right box body is mounted at theother end of the top surface of the fixed base; and supporting legs are mounted at four corners of the bottom end of the fixed base. An electric heating stockpot is arranged between the left box bodyand the right box body; a left supporting rotating shaft is welded to the middle of one side of the outer surface of the electric heating stockpot. A driven cam is welded at one end of the left supporting rotating shaft. A right supporting rotating shaft is welded in the middle of the other side of the outer surface of the electric heating stockpot; and a fixing groove is formed in the middle ofthe inner wall of the left box body. The left supporting rotating shaft, the driven cam, the rotating shaft groove, the right supporting rotating shaft, a supporting groove, a mounting groove, the fixing groove, a fixing clamping groove, a stepping motor and a driving cam are arranged, the electric heating stockpot can be turned over by starting the stepping motor, so that the discharging difficulty of cooked food materials is reduced, and use of the electric heating stockpot is facilitated.

The present invention discloses a check valve for vapor recovery. The check valve comprises a valve body, a first coupling end, a second coupling end, a valve disc, a valve seat, and a valve cover. The first coupling end is formed on one side of the valve body, and the second coupling end is formed on the other side of the valve body. The valve disc is fixedly arranged within the valve body in a position where a first passage and a second passage communicate with each other. The valve seat is formed on one side of the valve body in a position parallel to the valve disc. A valve rod is nested in an opening of the valve seat. A baffle plate is fixedly arranged at one end of the valve rod, and a limiting plate is fixedly arranged at the other end of the valve rod. An outer side of the valve seat is fixedly connected with the valve cover through a bolt, and a spring is fixedly arranged in the middle of an inner side of the valve cover. With the spring arranged between the limiting plate ofthe valve rod and the valve cover, the impact force on the baffle plate after being impacted by airflow can be buffered by the spring, thereby preventing the impacted valve rod from deformation. In short, the check valve for vapor recovery is simple and practical.

The invention provides a cement-based material alkali aggregate reaction measuring device and a measuring method. The device comprises a constant-temperature box, a temperature control device used for adjusting the temperature of liquid is arranged in the box body, and a limiting groove is engraved in a bottom plate on the lower portion of the box body; a limiting plate parallel to the bottom plate is arranged at the upper half part of the hollow cavity, and a first limiting hole is formed in the limiting plate in a penetrating manner; a heat preservation cover plate is arranged on the top of the box body and is parallel to the bottom plate, a second limiting hole is formed in the heat preservation cover plate in a penetrating mode, and a displacement meter is arranged over the first limiting hole; and the device further comprises an upper measuring nail and a lower measuring nail which are fixed to the two ends of a mortar rod. When the device works, displacement data of the upper measuring nail is measured through the displacement meter, so that the length change value of the mortar rod is obtained, and the expansion rate of the mortar rod is obtained based on the length change value. The device is simple in design and convenient to operate, the method is clear, and the change of the expansion rate of the cement mortar test piece under the alkali aggregate reaction condition can be monitored in real time.

The invention discloses a combined take-off and landing device for a hypersonic vehicle wheel-ski, which comprises a main buffer outer sleeve (1), a main buffer piston rod (2), wheels, a buffer actuating module and a ski assembly; the buffering actuating module is arranged on the main buffer piston rod (2) at the side surface of the wheels; the buffer actuating module comprises an air cavity (8),an oil cavity (9) and a floating piston (16) which are coaxially arranged; the air cavity (8) is vertically fixed below a buffer actuating module bracket (7), the oil cavity (9) is arranged outside the air cavity (8), and a spring (18) is arranged between the air cavity and the oil cavity; the floating piston (16) is arranged in the air cavity (8) ; a hydraulic sensor (12) for detecting the pressure in the oil cavity (9) in real time is arranged at the lower end of the oil cavity (9) and feeds back to an airplane main control system. The device has the advantages of small size and light weight, and can be applied to a hypersonic vehicle with strict limitation requirements on the size and performance of the take-off and landing device.

A carbon buildup removal device with protection function of vibration detection is provided for electrically connecting to an engine from which carbon buildup is to be removed. The carbon buildup removal device includes a gas output unit and a vibration detection unit. The gas output unit outputs a gas that is supplied to the engine. The vibration detection unit includes a vibration detector that detects vibration of the automobile and a controller that is electrically connected to the vibration detector and the gas output unit. By using the vibration detector in combination with the controller, when the engine stops operating or is operating abnormally, power supplied to the gas output unit is cut off so as to prevent excessive accumulation of gas and thus back fire or excessive pressure to thereby improve stability and safety of carbon buildup removal operation of the engine.

The underlying invention is directed to devices for collecting objects, such as fruits, from the ground. In particular, an object collector grid protector (11) is provided, which is configured for use with a collector grid basket (8) of an object collector device. A corresponding basket (8) comprises an object penetrable grid comprising a plurality of mutually spaced resilient grid bars (9) supported by and extending off a basket base (10). The object collector grid protector (11) comprises at least one annular protector shell (13) with a predefined lateral width (W) overlapping, when properly applied to the grid basket (8), with a predefined grid basket section located adjacent to the basket base (10), to thereby disable in the overlapping region a passage of objects into the grid basket (8).

The invention discloses a quasi-constant voltage drop self-stop write-in method of a resistive memory unit. The method comprises the following steps of: establishing a write voltage and a write current flowing through the resistive memory unit; copying the write current to generate a copied write current; enabling the copy write-in current to flow through a simulation circuit to generate a simulation write-in voltage; adding the simulation write-in voltage to the reference voltage in a micro-amplitude manner along with the write-in time so as to generate a write-in reference voltage; and adjusting the write-in voltage and the write-in current according to the write-in reference voltage, so that the cross voltage at the two ends of the resistive memory unit is kept fixed or slightly increased during the write-in period. When the copy write-in current reaches a preset target current value, a stop signal is sent out; and the related write circuit is closed by the stop signal so as to optimize the write period of the resistive memory unit.

The invention discloses a firing furnace for ceramic manufacturing. The firing furnace comprises a furnace body, wherein the bottom end of the furnace body is fixedly provided with a power box; the two sides of the furnace body are fixedly provided with heating boxes; a motor is fixedly arranged inside the power box; the output end of the motor passes through a furnace wall at the bottom end of the furnace body, and is fixedly provided with a rotary shaft; a plurality of placing tables are fixedly arranged on the surface of the rotary shaft at equal spacing; a cavity is arranged on the middlepart of the rotary shaft; an electric heating wire is arranged inside the cavity; the cavity wall of the cavity side is provided with a plurality of first through holes; heating rods are fixedly arranged inside the heating boxes; and a pressure relief hole is formed in the top end of the furnace body. According to the firing furnace for ceramic manufacturing disclosed by the invention, the electric heating wire and the heating rods are arranged, so that electric energy can be converted into heat energy; the motor is arranged for driving the placing tables to rotate, so that a ceramic product can be uniformly heated; and the pressure relief hole is formed, so that pressure intensity inside the furnace body is prevented from being excessively great to cause furnace body damages.

The invention belongs to the technical field of curtain rods, and discloses a curtain rod with a self-locking function, which comprises a main rod and two auxiliary rods, grooves are formed in the left side and the right side of the main rod, the two auxiliary rods are respectively inserted into the two grooves, and tooth grooves which are arranged at equal intervals are fixedly connected to the inner top walls and the inner bottom walls of the two grooves. A left tooth block and a right tooth block are arranged in each of the two grooves. According to the scheme, when the length of the curtain rod is adjusted, the pressing assembly is pressed, the pressing rod is driven to move into the groove, then the abutting assembly is driven to move, the tooth block is driven to be separated from the tooth groove, then the auxiliary rod is pushed and pulled according to installation requirements, the length of the curtain rod is adjusted, and after the length of the auxiliary rod is determined,force on the pressing assembly is canceled; the abutting assembly drives the tooth block to reset and be inserted into the tooth groove again, so that self-locking of the auxiliary rod is achieved, secondary change of the length of the curtain rod is prevented, the structure is ingenious, and the operation is easy.

The invention, which belongs to the field of pediatric surgery, discloses a balloon dilatation tube for the pediatric hepatobiliary surgery department. The balloon dilatation tube comprises a catheterbody, a balloon assembly, a catheter reinforcer, a catheter seat, and a perfusion inner tube arranged in the catheter body. The perfusion inner tube penetrates the two ends of the catheter body. Theballoon assembly is installed at one side of the catheter body; one end, away from the balloon assembly, of the catheter body is connected with the catheter seat through the catheter reinforcer. A main channel and an auxiliary channel are respectively arranged on the catheter seat and are provided with second inflation inlets; a first inflation inlet is formed in the end, away from the balloon assembly, of the perfusion inner tube; a medicine injection opening is formed in one side of the first inflation inlet; and the outer end of the medicine injection opening penetrates the exterior of theperfusion inner tube. In addition, the balloon dilatation tube also includes an inflation device. The balloon dilatation tube having the high functionality is capable of reducing the pain and psychological burdens of a patient greatly; medicine treatment can be carried out, liquid medicine enters the body of a patient in a powder mist mode, and the powder adheres to the infection focus position, so that the medicine treatment is realized.

The invention discloses a ventilation device based on renewable fibers. The device comprises a ventilation pipe, a filter assembly is arranged in the ventilation pipe, a wind wheel is fixedly mounted at the right side in the ventilation pipe, the wind wheel is connected with the filter assembly through an elastic rope, an air inlet pipe is fixed below the ventilation pipe, the filter assembly comprises filter screens, a fan is arranged between the two filter screens, the left side of the fan is connected with a motor through a bearing, the motor is fixedly connected with the filter screen at the left side, the right side of the fan is attached to the filter screen at the right side, a telescopic bin is fixed to the middle of the filter screen at the right side, a spring ball is arranged in the telescopic bin, and a rotating shaft is fixed to the center of the rear side of the wind wheel, a centrifugal ball is connected to the outer side of the rotating shaft through a spring, a flexible film is arranged at the outer side of the centrifugal ball, and an elastic wall is fixed to the outer side of the flexible film. The ventilation device has the advantages of being capable of automatically changing filter modes and automatically changing cleaning modes.

The invention discloses a concrete paving and flattening machine capable of accelerating concrete solidification and used for pavement construction. The concrete paving and flattening machine comprises a paving and flattening machine cross beam, a press roller, an idler wheel, a left baffle and a right baffle. The left baffle is fixedly arranged at the lower left end of the paving and flattening machine cross beam, the right baffle is movably arranged at the lower right end of the paving and flattening machine cross beam, and the left baffle and the right baffle are of rectangular platy structures; the press roller is arranged between the left baffle and the right baffle. Only one cross beam is arranged in the concrete paving and flattening machine, the whole concrete paving and flatteningmachine is small, simple in structure and low in weight, and the manufacturing cost and construction cost are reduced; an electric heating plate is arranged on the paving and flattening machine crossbeam above the press roller and heats the press roller, the press roller transmits heat to concrete when the concrete pavement is flattened, moisture in the concrete can be quickly evaporated, the aim of increasing the drying speed of the concrete pavement is achieved, and the concrete paving and flattening machine is suitable for popularization.

The invention relates to an anti-vibration device and method for machining a diesel engine base rack. The anti-vibration device comprises two pressing plates arranged side by side, wherein the opposite side faces of the two pressing plates are used for pressing a plate to be damped; a shear fork bracket is connected between the two pressing plates; and the shear fork bracket can adjust and fix thedistance between the two pressing plates through shear fork deformation under the condition that it is guaranteed that the two pressing plates are parallel. According to the anti-vibration device, vibration of a middle body and a middle plate can be reduced during machining of the diesel engine base rack, so that the machining quality is improved.