71results about How to "Improve reliability and service life" patented technology

The invention relates to a waste water immersion probe (10) comprising a liquid-tight housing (11), a sensor (18) which is disposed in the housing (11) and a sensor window (20) formed on the housing (11). A wiper element (22) for cleaning the sensor window (20) is arranged on the outside of the sensor window (20), and the wiper element (22) is driven by a drive motor (24) which is arranged essentially in the housing (11). The housing is devoid of openings. A magnetic element (36, 37) is associated with the drive motor (24) and a magnetic element (34, 35) is associated with the wiper element (22) in such a manner that the magnetic drive motor element (36, 37) produces a magnetic field which transverses the housing wall and transmits a drive torque to the wiper element (22) without a shaft.

The invention discloses a method for determining abrasion amount of a solid lubricating coating for a sliding contact component, and the sliding contact component and a manufacturing method of the sliding contact component. The method for determining the abrasion amount comprises the following steps of: on the basis of a load, the geometrical shape of a contact part and material parameters, computing distribution of contact pressure between the sliding contact component and a matched body; and on the basis of the distribution of the contact pressure, the relative movement velocity of the contact part and an abrasion coefficient of the solid lubricating coating, determining the time-related abrasion amount of the solid lubricating coating. The manufacturing method comprises the following steps of: after determining the time-related abrasion amount of the solid lubricating coating, acquiring initial outline parameters of the solid lubricating coating on the basis of the abrasion amount and the service life of the sliding contact component; and on the basis of the initial outline parameters, forming the solid lubricating coating on a base body of the sliding contact component. The solid lubricating coating on the sliding contact component can be quickly determined and has the precise size and surface outline; the reliability of the sliding contact component is improved; and the service life of the sliding contact component is prolonged.

The invention discloses a distributed driven type rocking sieve comprising a base, a motor, a driving shaft, a first crank-link mechanism, a second crank-link mechanism, an inner sieve box, an outer sieve box, a first suspension rod, a second suspension rod and a rack. The two sieve boxes are suspended on two four-link mechanisms by adopting the driving shaft provided with four eccentric sections and combining the two crank-link mechanisms with the two suspension rods, an elastic sieve screen composed of multiple small rectangular sieve plates is combined, and elastic flexure movement on the elastic sieve screen is caused to realize material sieve penetration while the two sieve boxes move relatively. The distributed driven type rocking sieve is high in complete reliability, good in combination property, smooth in movement, convenient to mount and position, simple in complete structure, convenient to maintain, energy saving, low in dynamic stress of a sieving machine and applicable to the fields of coal, metallurgy, chemical engineering, environmental protection and the like.

A memory circuit comprises a memory unit array and a peripheral circuit. The peripheral circuit consists of a charge pump circuit and a clamping circuit connected with the charge pump circuit, the clamping circuit comprises an overvoltage protection module and a clamping module which are connected in parallel, the overvoltage protection module is used for protecting an MOS (metal oxide semiconductor) transistor in a high-voltage circuit of a memory, the clamping module is used for clamping output voltage of the charge pump circuit, and an output end of the charge pump circuit is coupled to a first end of the clamping module. The memory circuit simultaneously guarantees reliability of threshold windows of memory units, reliability of the memory units and reliability of the transistor in the high-voltage circuit, and constant clamping voltage within a working temperature range can be realized.

This invention relates to a measuring method and system for air temperature of preheater couple. The method is as following: to fix eleven exclusive heat electric thermocouple probes according to the size and direction of the radius of preheater in the air outlets on A, B side of the preheater; and to fix two exclusive electric thermocouple probes in the air inlet and to fix two exclusive electric thermocouple probes in gas inlet and to fix hoop approach switch and inductive slice in rotary axis of preheater. The whole apparatus can be operated with electricity, setting the temperature of temperature controller in control cabinet. Then to calculate the temperature of air inlet, gas inlet and air outlet through the program control and thus get a group of values of temperature efficiency of preheater. The temperature around inner points of the preheater can be read on the touch display.

The invention discloses a novel sea water desalinization evaporator, which comprises a steam inlet device, a sea water spraying device, an evaporator shell, a steam demister, a sea water inlet device, a fresh water collection outlet device, a strong brine outlet device, a heat exchange pipe bundle, a pipe plate, an internal bracket, an outer support seat and an external reinforcing bracket, wherein the evaporator shell is formed by connecting a plurality of shells of effect evaporators by welding; anticorrosive coatings are coated on the inner walls of the evaporator shells and welding seams between two adjacent evaporator shells; the heat exchange tube bundle and a rubber ring for a tube plate are elastically sealed and connected; and the tube plate is fixed on the internal bracket. The invention has the beneficial effects that the cost of the shells is reduced by over 50 percent; an integral welding structure solves the problem that the connecting parts among the effect evaporators is leaked; and the heat exchange tube bundle and the tube plate are elastically connected by using a rubber sealing ring, thereby not only avoiding the problem that the connecting part is leaked, but also reducing the vibration strength of the heat exchange during use and improving the reliability and the service life of the equipment.

The invention provides a heat-dissipation structure for an LED (Light Emitting Diode) light. The heat-dissipation structure comprises a cavity defined by an LED light shell (1) and a lens (2), and a driving power supply (6) accommodated in the cavity. The heat-dissipation structure is characterized in that the an energy accumulation cavity (3), a shell baseplate (4), a PCB (Printed Circuit Board) (7) and LED granules (5) are arranged in the cavity, wherein the shell baseplate (4) and the energy accumulation cavity are matched to form a sealed cavity, the PCB (7) is connected with the energy accumulation cavity (3), and the LED granules (5) are arranged on the PCB (7). According to the invention, phase-change materials with a certain mass is embedded in the energy accumulation cavity; when the LED light works, heat generated by the LED granules is transferred to the PCB and then transferred to the phase-change material layer through the baseplate of the energy accumulation cavity; when heated to fusing point temperature, the phase-change material begins to absorb a great quantity of heat generated by the LED granules to keep the temperature of LEDs unchanged basically until the phase change process of all the phase-change materials is finished. By adopting the heat-dissipation structure, the reliability and the service life of the LED light can be improved.

The invention relates to a fiber jumper wire joint. The fiber jumper wire joint comprises an insertion core, a fiber, an insertion core seat and a metal connecting piece. The front end of the insertion core seat is connected with the insertion core, the metal connecting piece sleeves the connecting position of the insertion core seat and the insertion core, and the fiber passes through the insertion core seat and extends into the insertion core; the insertion core is internally provided with an accommodation space, a collimating lens is installed in front of the accommodation space, the collimating lens is disposed at the front end portion of the insertion core, the front end portion of the fiber is disposed in the accommodation space, and the accommodation space is a sealing space; and the front end portion of the fiber is disposed at the focus of the collimating lens. The invention also relates to a large-power semiconductor laser assembly cooperating with the fiber jumper wire joint for application. The fiber is sealed in the insertion core, the collimating lens exposed in environment has a quite large relative dimension, laser energy is quite dispersive, the reliability of the fiber jumper wire joint is improved, and the service life of the fiber jumper wire joint is prolonged. Compared to a conventional SMA fiber jumper wire joint, the fiber jumper wire joint and the large-power semiconductor laser assembly are more reliable and have wider application.

A movable sun visor mechanism for vehicle light type switch comprises a movable sun visor and a light type switch driving device. The movable sun visor is arranged on a fixed sun visor of a vehicle light type switch device, and rotationally connected with the fixed sun visor through a revolving shaft of the light type switch driving device as well as the two ends of the revolving shaft, and oscillating bars extending in the radial direction of the revolving shaft, the movable sun visor is fixed and connected to the oscillating bars and arranged on the light axis of a vehicle light, the inclined angle between the movable sun visor and the light axis can be changed along with the revolving angle of the revolving shaft of the light type switch driving device. The contour line of the movable sun visor is located at the light path of the vehicle light, and the projection forms far and near illumination light types changing along with the revolving angle of a revolving shaft sub-assembly. The oscillating angle of the movable sun visor is the same with the revolving angle of the revolving shaft sub-assembly. According to the invention, the movable sun visor and a rotor have a linkage relation, so that accurate changes of light types are realized, and meanwhile, the collision noise generated during suction and release of electromagnets is avoided, so that a more comfortable driving environment is provided for users.

The invention relates to the technical field of sealing, in particular to a dynamic sealing device suitable for high speed and high pressure and an aircraft. The dynamic sealing device comprises a sealing shell, a rotating shaft, a liquid sealing wheel and a heat insulation sealing ring, wherein two cavities to be sealed are formed at intervals in the sealing shell, and a through hole making the two cavities communicate is formed in the sealing shell; the rotating shaft can rotate and at least partially penetrate through the through hole; the liquid sealing wheel is arranged on the rotating shaft, can rotate along with the rotation of the rotating shaft and can form a liquid seal between the rotating shaft and the sealing shell when rotating; and the heat insulation sealing ring is arranged between the rotating shaft and the sealing shell and is close to the liquid sealing wheel, and a combined seal is formed between the heat insulation sealing ring and the liquid sealing wheel; the rotating shaft which rotates at a high speed enables the liquid sealing wheel to form a liquid seal between the sealing shell and the rotating shaft, a blocking effect can be achieved for high pressure,the heat insulation sealing ring can achieve a high-temperature insulation effect, the influence of the high temperature on the whole dynamic sealing device is greatly reduced, so that the reliability and the service life of the dynamic sealing device are improved under severe working conditions of high rotating speed, high pressure, and large temperature gradient.

The invention relates to an automatic piece wrapping machine for storage battery pole pieces, which comprises a stand, a working platform and two sector plates, wherein the upper end camber surfaces of the sector plates are provided with ridges, and the sector plates can translate outwards; a gear shaft is also arranged above the sector plates, two gears are arranged on the gear shaft, and the two gears are respectively meshed with the ridged camber surfaces of the two sector plates; a delivery plate is arranged in front of the sector plates, and the side edges of the sector plates close to the delivery plate are provided with inward ribbed edges. A partition paper delivery channel is arranged behind the sector plates, and a cutter and a crease mold are arranged above the partition paper delivery channel; a paper folding shaft is arranged below the sector plates and is connected with a paper folding motor, and a paper folding plate is also arranged on the paper folding shaft; a lifting device is also arranged below the sector plates, the output end of the lifting device is connected with a lifting platform, and the lifting platform corresponds to the position of the ridged edges of the sector plates, rotated to the horizontal level. The automatic piece wrapping machine adopts a completely new structure, the positive and negative pole pieces of the sector plates can be accurately positioned and placed on the partition paper through the sector plates, and the piece wrapping quality can be ensured.

The invention discloses a titanium bolt surface ceramization method based on in-situ growth, which particularly comprises as follows: firstly, carrying out preprocessing on the surface of a test sample titanium bolt; then configuring electrolyte of a mixed acid system, carrying out micro-arc oxidation on the preprocessed titanium bolt in the electrolyte of the mixed acid system, and according to vanadate and tungstate which are added into the electrolyte in different concentration ratios, preparing different colors of titanium oxide based high-impedance ceramic layers, such as white, brick cyan, yellow, brown, black and the like; finally, carrying out dehydrogenization annealing on the titanium bolt subjected to micro-arc oxidation in a hydrogenation furnace to obtain a surface ceramic layer of the titanium bolt. The ceramic layer prepared by the method disclosed by the invention has an excellent mechanical property and a high impedance; adhesion and friction and abrasion of the titanium bolt are effectively improved, a safety coefficient and a service life of a heterogeneous metal connecting piece in a corrosion environment are effectively improved; the preparation method is environmentally friendly and can meet special demands in the fields of aviation, spaceflight, navigation, weapons and the like.

The invention provides a control method of an electromagnetic valve for air conditioner liquid injecting cooling. An air conditioner comprises a control unit and the electromagnetic valve used for controlling liquid refrigerants of a compressor of the air conditioner to be bypassed to the low-pressure side of the compressor. The control unit is used for controlling the electromagnetic valve to be opened and closed. The control unit controls the electromagnetic valve to be opened and closed according to the magnitude relation of the exhaust temperature T1 of the compressor and the exhaust temperature preset value and / or the magnitude relation of the exhaust superheat degree of the compressor of the control unit and the preset temperature value. The electromagnetic valve is controlled to be opened and closed by increasing the magnitude relation of the exhaust superheat degree and the preset temperature value. Thus, compressor oil has a good lubrication effect, the service life of the compressor is prolonged, and the reliability of the compressor is improved.

The invention discloses a valve combination mode of high polymer material combined with ceramic and a composite ball valve. A valve core and a valve seat are made of ceramic material; a valve body is made of the high polymer material; the valve seat on at least one edge is arranged on a compensating pressing sleeve made of the high polymer material of which an expansion coefficient is greater than that of a material of the valve body, and the compensating pressing sleeve compensates a gap error caused by difference of expansion coefficients between the valve core and the high-polymer valve body material by surplus expansion quantity generated by the expansion coefficient greater that the valve body material. The invention proposes a new ball valve structure combined with the high polymer material and the ceramic by combining a common high polymer material injection technology with a production technology of a ceramic product, and the prepared ball valve has double advantages of both the high polymer and the ceramic, has corrosion resistance, durability, high service life and reliability. The productive technology complexity and the production cost are greatly reduced compared with those of the ball valve with a steel and ceramic composite structure.

The invention discloses a folding type pedal, relates to a structure of cranks operated by feet, and is a double-crank rotary folding type pedal adopting the clutch principle. The folding type pedal comprises a pair of pedal plates, a pair of pedal shafts, a pair of cranks, two connecting pins, a crank shaft a, a crank shaft b, two clamp nuts and a clutch, wherein the clutch consists of a sleeve,a pin a and a pin b, two long sliding chutes are symmetrically arranged in the upper surface and the lower surface of the circular-surface diameter of one end of the sleeve, and two short sliding chutes are symmetrically arranged in the upper surface and the lower surface of the circular-surface diameter of the other end of the sleeve. According to the folding type pedal, the pedal plates are avoided being folded, the service life of the pedal is prolonged, the reliability of the pedal is improved, the folding operation is simple and convenient, and the folding type pedal is not only suitablefor folding bicycles, but also used for various folding tools driven by manpower, such as folding body-building chairs and folding wheel chairs.

The invention particularly relates to a method for adding wear-resistance coating on an M50NiL material bearing guidance surface, which belongs to the field of bearing structure design and aims at solving problems that the existing M50NiL material bearing generates guidance surface wearing and is short in service life at the use initial stage. The method comprises the following steps: (1), before a final roller grinding operation, utilizing a multi-arc ion plating apparatus, preparing a TiN coating on the bearing guidance surface in a deposition manner, filling N2 and Ar gas in a sealed furnace body, setting the internal gas pressure of the furnace body to be 0.4-0.6 Pa and the temperature of the furnace to be 280-300 DEG C, and electrifying the apparatus with the current of 60-80 A by taking a Ti target as an anode and a to-be-processed M50NiL material bearing as a cathode, thereby obtaining the M50NiL material bearing with the TiN coating with the thickness of 3-5 microns.

The invention discloses a travelling transmission mechanism of a rice transplanter. The travelling transmission mechanism comprises an engine, a transmission, a steering clutch, a first travelling transmission mechanism and a second travelling transmission mechanism, wherein the first travelling transmission mechanism comprises a first power output shaft, a first drive bevel gear, a second drivenbevel gear, a first power transmission shaft, a first spline joint, a second drive bevel gear and a second driven bevel gear; the second travelling transmission mechanism comprises a second power output shaft, a second drive bevel gear, a third driven bevel gear, a second power transmission shaft, a second spline joint, a fourth drive bevel gear and a fourth driven bevel gear. The travelling transmission mechanism has the remarkable characteristics of high transmission efficiency, a great power and speed transmission range, balanced and reliable operation, a long service life, convenient maintenance and the like. After applied to a walking type rice transplanter, the travelling transmission mechanism can greatly improve transmission efficiency of the rice transplanter, reduces operation vibrations and noises of the rice transplanter, improves the working reliability of the rice transplanter, and prolongs the service life of the rice transplanter.

DiscLosed is a running-through channeL for a seLf-guided virtuaL raiL train. The running-through channeL comprises a foLding shed assembLy fixed between two vehicLe end connectors and is characterizedin that the shape of the foLding shed assembLy correspondingLy cooperates with that of a vehicLe end connecting pLate on the vehicLe end connectors, the foLding shed assembLy fixedLy fits the vehicLeend connecting pLate and is of a two-section combined structure, and two sections are symmetricaLLy arranged and fixedLy connected through a middLe frame. The running-through channeL meets the cooperative mounting requirement of the speciaL shapes of the vehicLe end connectors of the virtuaL raiL train and the driving requirement for Large-angLe and smaLL-curvature-radius turning in the process of driving the seLf-guided virtuaL raiL train, the turning performance of the running-through channeL is improved, the service Life of the running-through channeL is proLonged, and the reLiabiLity of the running-through channeL is improved. The invention further provides a design method of the running-through channeL for the seLf-guided virtuaL raiL train.

The invention discloses an electric parameter auto recording and transmitting device, comprising microcontroller, keyboard interface, FLASH memory, display, external digital electric meter and multichannel isolated power supply, where the external digital electric meter is connected through communication interface with the microcontroller; the memory space of the FLASH memory is divided into X blocks which act as a head-tail interlinked annular circulating memory area; when a data block is written in, it records a number Y at block head, where Y belongs to [0,a], and a >=2(X+1); and it defines the block number used for the previous recording as Z, and when normally recording, the number Y= Z+1; when electrifying again to wait for special event after power off, the number Y=Z+2. And the invention extremely prolongs service life and improves reliability.

The invention relates to a method for eliminating friction pair of a refrigerator inverter compressor by adopting a magnetic bearing. The method comprises the following steps: step one, enabling the distance I between the lower surface of a permanent magnet rotor and the lower surface of a stator core to be greater than the distance II between the upper surface of the permanent magnet rotor and the upper surface of the stator core; step two, enabling the center line of the permanent magnet rotor to be below the center line of the stator core to produce magnetic eccentricity in a specific direction; step three, generating an upward magnetic pull force F opposite to the gravity direction on the permanent magnet rotor under the action of the specific magnetic eccentricity; disappearing a friction pair between a crankshaft thrust surface and a crankcase thrust surface and between the upper surface of an inner hole of the permanent magnet rotor and the lower surface of a crankcase axle hole, so that the friction pair at the position disappears and cannot generate friction heat any more, and heating of the compressor is reduced. The method can greatly improve the reliability and the service life of the inverter compressor, thus having broad market space.

The invention relates to a crushing shaft of a rubber rubbing and cutting machine, which comprises separable crushing shaft sleeve and spindle. The crushing shaft sleeve is fixed to the spindle through an end part fixing structure and a keyslot structure. The easily worn crushing shaft sleeve can be quickly and efficiently replaced; the reasonable section shape prevents the blockage of materials on a rubbing and cutting part; a thinner cutter groove can process fine rubber particles; a hexagonal axis clamping part can transfer larger torque; and the crushing shaft has the advantages of reasonable structure, convenient maintenance, good reliability and long service life.

A full-automatic static elimination system comprises a workstation, a PLC control cabinet, a branch control box, a de-electrification device and a monitor, wherein the de-electrification device is a dual-polarity ionic wind-type static de-electrification device and is used for receiving a control signal of the PLC control cabinet, an explosion-proof chamber is arranged on the monitor, a static charge detection board is arranged in the explosion-proof chamber, the branch control box is used for processing instruction air provided by a factory, transmitting the air to the de-electrification device after filtering, purification and pressure reduction, simultaneously connecting an ionic wind control signal sent from the PCL control cabinet to the de-electrification device and receiving pressure, returned back from the de-electrification device, of a pressure feedback pipe to the PLC control cabinet, the PLC control cabinet is used for acquiring a material charge signal of the monitor, acquiring a material transmission state signal transmitted from the de-electrification device, calculating ionic wind polarity and strength output from the de-electrification device and eliminating staticcharge brought by a material with ionic wind, the workstation is provided with a liquid crystal display, various running conditions of the static elimination system can be monitored in real time, anddatabase storage and inquiry on a historical running curve can be performed.

The invention relates to the technical field of automobiles, and particularly discloses an exhaust control method for a gas-driven urea pump system. The exhaust control method comprises the followingsteps of: S1, judging whether a key door is powered off or not, if so, entering step S2, and if not, entering step S3; S2, judging whether the gas pressure in a urea box is in a preset range and the environment temperature is higher than a preset temperature at the same time or not, if yes, not exhausting the urea box, and if not, exhausting the urea box; and S3, judging whether the rotating speedof an engine is zero, the current fuel injection quantity is zero, the vehicle speed is zero and the accelerator pedal opening degree is not smaller than a preset value within preset time at the sametime or not, if yes, exhausting the urea box, and if not, not exhausting the urea box. By means of the exhaust control method, the problems that the urea box is frequently exhausted, air consumptionof an air compressor is wasted, personnel safety cannot be guaranteed during manual exhaust, and threads of a urea box cover are abraded can be solved.

The invention provides a pressure adjusting structure comprising a valve seat, an exhaust tube and a magnetic valve body. The lower end of the exhausting tube passes through the valve seat; the magnetic valve body sleeves the upper end port of the exhausting tube; a magnetic cushion block is arranged between the valve seat and the magnetic valve body; and the magnetic cushion block is provided with a magnetic cushion block adjusting structure adjusting movements of the magnetic cushion block in a horizontal direction. When a pressure limiting value of a pressure-limiting valve has to be adjusted, positions of the magnetic cushion block in the horizontal direction is adjusted by the magnetic cushion block adjusting structure, so an area of the magnetic cushion block relative to the magnetic valve body can be changed; when the area changes, the magnetic field force between the magnetic cushion block and the magnetic valve block can be changed; the pressure limiting value of the pressure limiting valve can be adjusted and food cooking effect of the pressure cooker can be improved; the pressure adjusting structure does not contain elastic members, so adjusting performance decrease due to elasticity extenuation of the elastic components under the high-temperature and high-humidity environment for long time can be avoided; and product reliability can be improved and service life can be prolonged.

The invention discloses a novel grounding reinforcement device which comprises an upper pressing plate, a lower pressing plate, a middle pressing plate and a detachable fastener, wherein the upper pressing plate is made of an insulating material; a first notch raised in the outside direction is formed in the inner side of the upper pressing plate; two ends of the first notch respectively penetrate through the edge of the upper pressing plate; the lower pressing plate is made of an insulating material; the inner side face of the lower pressing plate is opposite to the inner side face of the upper pressing plate; a second notch raised in the outside direction is formed in the inner side of the lower pressing plate; two ends of the second notch respectively penetrate through the edge of the lower pressing plate; the middle pressing plate is made of a conductive material and is arranged between the inner side faces of the upper pressing plate and the lower pressing plate; a first clamping space is formed between the inner side face of the upper pressing plate and a corresponding side of the middle pressing plate; a second clamping space is formed between the inner side face of the lower pressing plate and the corresponding side of the middle pressing plate; the upper pressing plate, the middle pressing plate and the lower pressing plate are connected in a fastened manner by virtue of the detachable fastener. The novel grounding reinforcement device has the advantages that the reliability and the service life of the device are greatly improved when being compared with those of the conventional device, and the subsequent grounding maintenance quantity of the equipment can be reduced.

The invention belongs to the airborne equipment technology, and the invention relates to a rubber heating pad used in the water and waste water system of an aircraft, in particular to a rubber heating pad with an automatic temperature control function, that is, an automatic temperature control rubber heating pad. The automatic temperature control rubber heating pad includes rubber seals, electric heating alloy wires, and a thermostat. The electric heating alloy wires and temperature controllers are placed in rubber. Completely isolated, the shape of the electrothermal alloy wire is straight or wound into a spiral state, and the heating circuit is led out by two high temperature resistant wires. The invention is installed in the water filling joint, sewage discharge joint and cleaning joint, which can prevent the water filling joint, sewage discharge joint and cleaning joint from freezing when the aircraft is flying, and the service life can reach 30 years or 30,000 flight hours.

An embodiment of the invention discloses an electric vehicle battery working temperature control device and method, and belongs to the technical field of electric vehicles. The control device includesan information acquisition module, a temperature sensor, a control module and an antifreeze wall; the information acquisition module is used for acquiring battery charge and discharge state information and battery information of a battery at different operating temperatures in all using stages; the temperature sensor is used for detecting the ambient temperature of the currently-used battery; andthe control module is used for obtaining a suitable operating temperature training model, obtaining the suitable operating temperature of the currently-used battery according to the training model and the information of the currently-used battery, comparing the ambient temperature with the suitable operating temperature and controlling the antifreeze wall to adjust the ambient temperature to thesuitable operating temperature of the currently-used battery when a comparison result shows that the two temperatures are not equal. The battery working temperature control device and method can automatically adjust the working temperature of the battery, keep the battery to have best charge and discharge characteristics, improve the reliability of the battery and prolong the service life of the battery.

The invention discloses an automatic speed adjusting device for a small-size two-stroke gasoline engine. The device comprises a carburetor (1), an adjustable-speed motor (3), a circuit controller (4), the engine (5), a flywheel and magnet motor (6) and an engine high pressure pack (7), the adjustable-speed motor (3) is fixed on the carburetor (1) through a mounting bracket (2), engine speed signals of the flywheel and magnet motor (6) which is installed on a crankshaft of the engine (5) are transmitted to the circuit controller (4), after making comparison with a set revolving speed, the circuit controller (4) outputs an adjustable-speed motor revolution signal, the adjustable-speed motor (3) is made to revolve forward or reversely, the accelerator opening of the carburetor (1) is driven by the adjustable-speed motor (3) to be opened or closed for a certain angle, the accelerator opening variation of the carburetor (1) controls the revolving speed of the engine (5), and the engine (5) is made to work at a constant speed under the set revolving speed. By means of the structure, the device has the advantages that the structure is simple and reasonable, the operation and use are convenient, the engine speed is adjusted automatically according to the set revolving speed, the operation is safe and reliable, and the device is capable of meeting emission requirements of the United States and the European Union.

The invention provides an indication emergency lamp which comprises a frame, a shell and a panel provided with an indication pattern. The frame is composed of metal frame bodies. The metal frame bodies are sequentially connected in an end-to-end mode to form the closed frame. The shell and the panel are installed inside the frame. One set of opposite metal frame bodies of the frame are respectively provided with a substrate, one face of each substrate is tightly attached to the corresponding metal frame body, and the other face of each substrate is provided with an LED light source; or one set of opposite metal frame bodies of the frame are respectively and directly provided with an LED light source in a packaging mode, and the periphery of each LED light source is covered with an optical layer. Batteries and power supply plates which are tightly attached to the metal frame bodies are arranged on the metal frame bodies of the frame. The batteries and the power supply plates are electrically connected with the LED light sources. The metal frame bodies are used as radiators for radiation, so that the radiating performance is improved, the reliability of the indication emergency lamp is improved, and the service life of the indication emergency lamp is prolonged; the LED light sources are installed on the set of opposite metal frame bodies, the light-emitting faces of the LED light sources of the two metal frame bodies are opposite, and the two sides of the panel are provided with light-emitting sources respectively, so that the brightness of the indication pattern of the panel is high and uniform.