58results about How to "No need to replace frequently" patented technology

The invention provides equipment and a method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone. The equipment comprises a feeding system, an ozone catalytic reaction tower and a spray absorbing tower; the feeding system comprises a wastewater pH regulation device, a wastewater feeding pipeline, a hydrogen peroxide aqueous solution feeding pipeline, an ozone feeding pipeline and a pH regulator feeding pipeline; the wastewater pH regulation device is communicated with the wastewater feeding pipeline and the pH regulator feeding pipeline respectively; the ozone feeding pipeline is communicated with the wastewater feeding pipeline; the ozone catalytic reaction tower is communicated with the wastewater feeding pipeline and the hydrogen peroxide aqueous solution feeding pipeline respectively so that wastewater undergoes once catalytic reaction in the presence of a first catalyst to generate a liquid flow and an ozone tail gas flow which are subjected to initial treatment; and the spray absorbing tower is communicated with a catalytic reaction system, is used for spraying at least one part of the liquid flow which is subjected to the initial treatment, and is contacted with the ozone tail gas flow in the presence of a second catalyst to undergo second catalytic reaction.

The invention discloses a treatment method and system of nickel-containing wastewater conforming to Water Pollutant Table III Discharge Standard. The method comprises the following steps: sending nickel-containing wastewater into a wastewater collecting tank, and pumping into a nickel reaction tank by a water pump to perform pretreatment; regulating the pH value, adding a heavy metal capturing agent, thoroughly mixing to react, adding a coagulant aid and a flocculant, sufficiently and uniformly stirring, and standing to precipitate or sending into a solid-liquid separation device; sending into an intermediate water tank, and adding a sulfuric acid solution to regulate the pH value to 7-8; and pumping water in the intermediate water tank into a heavy metal scavenger by a filtering machine, and treating to achieve the Table III Limit Discharge Standard. The method and system solve the problem that the existing nickel-containing wastewater in electroplating industry can not satisfy the Table III Discharge Standard in Water Pollutant Special Limits, so that the electroplating nickel-containing wastewater can stably satisfy the discharge requirements.

The invention belongs to the technical field of cutting and provides a steel pipe cutting machine which can improve the cutting efficiency of steel pipe cutting machines. The steel pipe cutting machine comprises a bench, and a clamping device, a cutting device, a trimming device, a cutting length adjusting device and a discharging device are disposed on the bench. The clamping device is used for clamping steel pipes, the cutting device is used for cutting the steel pipes, the trimming device is used for trimming a cutter, the cutting length adjusting device is used for adjusting the cutting length of the steel pipes, and the discharging device is used for moving the steel pipes into a containing box. When the steel pipe cutting machine is in use, the steel pipes are placed on the bench, the cutting length of the steel pipes can be adjusted through a measurement rod and a footstock, then the steel pipes are fixed by a first clamping block, a second clamping block and a pressure bar, the steel pipes cut by the cutter can be conveyed to the containing box through the discharging device, and when the cutter is abraded, a disc abrasive can be used for trimming the cutter. Cutting efficiency of the steel pipe cutting machine can be effectively improved.

The invention provides a multifunctional electric hammer structure applied to the technical field of electric tools. A motor (2) in an electric hammer shell (1) of the electric hammer structure is connected with a control component (3). A motor gear (6) is meshed with a bevel gear (7). The end, extending out of a cylinder body (5), of a ram (8) is connected with one end of a swing rod (9). The other end of the swing rod (9) is connected with an intermediate shaft (4). A bull gear (10) is arranged at the outer portion of the cylinder body (5). A tool drill bit (12) is installed on a cylinder body front end (11). A shifting sleeve (15) is arranged between a ram gear (13) and a drill bit gear (14) and connected with a shifting component (16). The shifting component (16) is connected with a gear shifting operation component (17). The multifunctional electric hammer structure can be conveniently and rapidly switched among a hammering state, a drilling state and a hammering and drilling state, the electric hammer structure does not need to be frequently replaced, and the work efficiency of the electric hammer structure is effectively improved.

The invention discloses an amino acid and acyl carnitine dry blood spot control material and a preparing method thereof. The dry blood spot control material is prepared from eight kinds of amino acid standard substances, 15 kinds of acyl carnitine standard substances and erythrocytes. According to the amino acid and acyl carnitine dry blood spot control material, the use quantity of standard substances is greatly reduced, the stability and homogeneity meet the requirement, and the amino acid and acyl carnitine dry blood spot control material can be stored for 4 months or longer at minus 20 DEG C. The preparing method is low in cost and easy to implement, the amino acid and acyl carnitine dry blood spot control material can be prepared in a large amount and is long in usage cycle, quality-control batch numbers do not need to be changed frequently, daily quality-control analysis is convenient, and thus the demand for the control material in clinical and daily detection is met.

The invention relates to an electric spark processing working solution circulating system with self-cleaning function, which comprises a solution storage box containing dirty working solution and clean working solution, a coarse filter and a working solution trough, wherein a solution outlet of a dirty working solution storage box chamber is communicated with an inlet of a fine filter through thecoarse filter, a filter pump and a control valve; an outlet of the fine filter goes into a clean working solution storage box chamber through a pipeline controlled by a valve; another solution outletof the box chamber is communicated with the working solution trough through a transmission pipeline with a solution feeding pump, a solution washing pressure valve pipeline and a solution pumping pressure valve pipeline are arranged on the transmission pipeline communicated with the working solution trough in parallel, and the working solution trough is communicated with the dirty working solutionstorage box chamber by another through pipeline; a clean circulation loop is arranged between the fine filter and the dirty working solution storage box chamber, a pipeline is communicated between the fine filter and the dirty working solution storage box chamber, an upper control valve and a lower control valve are arranged in the pipeline, the upper control valve is at least a three-way valve,a third control port of the upper control valve is communicated with a clean filter from top to bottom, and the clean filter is provided with a lower outlet communicated with the dirty working solution storage box chamber of the solution storage box.

The invention discloses a punching production main machine. The punching production main machine comprises a base, a fixed machine base, a movable machine base, die changing devices, pressing devices, a positioning device, a floating supporting device, a servo power device, a hydraulic power device and an electrical control device. The fixed machine base is fixed to the base, and the movable machine base can move in the Y direction along a guide rail on the base. The servo power device is fixed to the base. The punching production main machine is characterized in that each of the fixed machine base and the movable machine base is provided with a hydraulic power cylinder, a pressing head and a die frame; each pressing head is provided with the corresponding die changing device and internally provided with a resilience device; and each die frame is provided with the corresponding upper side pressing device, the corresponding side face pressing device, a punch rod, a punch nut, a punch and a female die. According to the technical scheme, operation is convenient, the automation degree is high, and the machining precision is improved; and the work hour is reduced, the machining cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of medical instruments and discloses leg sleeve connecting equipment of air pressure wave therapeutic equipment. The leg sleeve connecting equipment comprises four air bags, wherein the four bags are as long as the thighs, a joint air pipe is mounted in the air bags and penetrates through the four air bags, a pressure device is connected with the left side of the joint air pipe, and a movable hole is formed in the top of the joint air pipe. According to the leg sleeve connecting equipment of the air pressure wave therapeutic equipment, one joint air pipe penetrates through all the air bags, during using, air inflation starts from the left side of the joint air pipe, pressure of the left side of a piston becomes large, the piston starts to move rightwards, when the piston passes through the position below the movable hole, a movable rod is pushed to move upwards, at the moment, a first air hole and a second air hole are tightly attached, meanwhile, an opening in the lower part of the second air hole is moved out of a base sleeve, an opening in the upper part of the first air hole is moved to the position above a mounting table, therefore, a left cavity of the joint air pipe is communicated with the air bags, air is poured into the air bags, and the piston is not pushed to move by airflow any longer due to the fact that a vent port for the airflow is found.

The invention discloses a performance test table for a compressor. The performance test table comprises a machine frame. An exhaust pipe, an oil separator, a calorimeter, a gas-liquid separator and anair suction pipe which are sequentially connected are installed on the machine frame, the exhaust pipe is connected with an exhaust port of the compressor, and the air suction pipe is connected withan air suction port of the compressor. The machine frame is further provided with a condenser, a drying filter and an evaporation condenser which are sequentially connected. The air outlet end of thecalorimeter is connected with a second connection pipe, the condenser is located on the second connection pipe, the liquid outlet end of the second connection pipe is connected with the liquid inlet end of the drying filter, the second connection pipe is provided with an adjusting valve, the liquid outlet end of the drying filter is connected with the liquid inlet end of the evaporation condenser,an electronic expansion valve is arranged between the drying filter and the evaporation condenser, and the air outlet end of the evaporation condenser is connected with the air inlet end of the gas-liquid separator. One test table can be applicable to various types of compressors without frequently replacing the condenser, the test table has the high applicability, and the cost per use is reduced.

The invention discloses a slow release attractant for preventing and treating cyrtotrachelus bugueti guer and a preparation method thereof. The slow release attractant is prepared by the following raw material components by parts by weight: 10-100 parts of benzaldehyde, 1-20 parts of benzpyrole, 5-90 parts of linalool and slow release ingredient; wherein the slow release ingredient comprises silicon dioxide the addition weight of which is 2.5-3.5 times of total weight of benzaldehyde, benzpyrole and linalool, methylcellulose the addition weight of which is 0.45-0.55 time of the total weight of benzaldehyde, benzpyrole and linalool and sodium benzoate the addition weight of which is 0.45-0.55 time of the total weight of benzaldehyde, benzpyrole and linalool. The slow release attractant forpreventing and treating cyrtotrachelus bugueti guer prepared by the invention has long effective duration, good preventing and treating effects and low cost, is non-toxic to insect, natural enemy andpeople and livestock, has no environmental pollution and is applicable to being popularized and applied in bamboo forest area.

The invention provides a laser cladding-double-wire CMT wire powder composite additive manufacturing system for a heterogeneous component, a CMT double-wire welding gun and a laser cladding welding gun are arranged on the same machine arm through an arc welding gun and laser welding gun connection and control device, the bottoms of the two welding guns are kept on the same plane, through the additive control system, cooperative control over the two welding guns is achieved, different wires and metal powder are assembled at the same time, the laser, CMT and laser-CMT wire powder composite additive process is achieved, and an additive scheme is generated through an additive control system and a layered modeling and intelligent planning software system according to the precision, performance and material requirements of heterogeneous components. The high-performance component compounded by multiple materials is integrally added by alternately using three different processes, and the additive system integrates the advantages of high electric arc additive efficiency and high laser additive precision so that the production cost is reduced, the additive precision and efficiency are improved, and meanwhile, integrated additive manufacturing of a large complex heterogeneous component compounded by multiple metal materials on one set of equipment is achieved.

The invention discloses an ultra-thin film viewing illuminator, which comprises a frame body, a transparent device, a backboard, a light source and a drive. The ultra-thin film viewing illuminator is characterized in that the frame body is sequentially and fixedly provided with a light guide plate and the rear panel from the front side to the back side; an edge of the light guide plate is provided with a reflecting shade, and the light source is arranged inside the reflecting shade. The reflecting shade comprises a reflecting shade body with an arch structure and a planar lateral wing, and the lateral wing is connected with the front side of the light guide plate. The invention has the advantages of even illumination, safe energy conservation, correct film-reading, eyes protection, ultra-thin shape and low production cost.

The invention discloses a condensing device which comprises a cooling pipe, a condensing tube, a heating tube and a clamping device, wherein the inlet of the condensing tube is designed into the shape of bell-mouth, and the inner wall of the bell-mouthed part of the condensing tube is a spherical ground surface. The outer wall of the heating tube connected with the condensing tube is a spherical ground surface matched with the spherical surface at the bell-mouthed part of the condensing tube, so that the sealing connection between the heating tube and the condensing tube can be ensured, and no gas is discharged from the contact surface, meanwhile, for further ensuring the sealing connection between the heating tube and the condensing tube, the contact opening part of the heating tube and the condensing tube is clamped by using the clamping device. In the condensing device, the condensing tube and the heating tube can be directly subjected to sealing connection without using rubber tubes, therefore, the frequent change of connecting parts is not required, meanwhile, the condensing device is convenient to disassemble, and the condensing tube and heating tube can be separated just by taking down the clamping device.

The invention relates to a reversing color-changing lamp which solves problems that the traditional changing lamp shines only when falling towards a direction and the color of the lamp is changeless. In the invention, a luminous body is arranged in a lamp shade; the luminous body comprises gravity switches and light-emitting diodes; a plurality of light-emitting diodes (2) connected in series are spliced on a circuit board (1) of the luminous body; each group of light-emitting diode circuits connected in series is connected to the positive pole and the negative pole of a power supply (4) in parallel; a common switch and a multidirectional ball gravity switch (5) which are connected in series are arranged at the positive pole or the negative pole of the power supply; the long axis of the multidirectional ball gravity switch (5) is vertical to the circuit board (1); the circuit board (1) is peripherally provided with a plurality of unidirectional ball gravity switches (3), long axes of which are arranged on the circuit board or parallel to the flat surface of the circuit board; and each unidirectional ball gravity switch (3) is connected with a group of light-emitting diode series circuit in series.

The invention relates to a system and method for collaborative removal of mercury and sulfur dioxide from flue gas. The system can utilize the existing traditional flue gas desulfurization tower or washing tower, in which a slurry pool, an inlet flue, a slurry spray layer, a lower washing layer, a composite adsorption catalyst layer, an upper washing layer, a demister and an outlet flue are arranged from the bottom up in order. According to the invention, a composite adsorption catalyst layer and a washing layer are added above the slurry spray layer, while the composite adsorption catalyst adsorbs mercury in flue gas, sulfur dioxide in the flue gas is catalyzed for oxidization into sulfuric acid liquid drops, and then the generated sulfuric acid liquid drops are discharged from the composite adsorption catalyst layer by means of spray washing. Compared with other traditional flue gas mercury removal methods like adsorbent jet technology or activated coke / activated carbon dry process integration technology, the system has the advantages of simple structure, easy installation, small floor area and low operation cost, and also has the function of further improving the removal rate ofsulfur dioxide.

The invention belongs to the technical field of compressors, and particularly relates to an oil-gas pressure accompanying control device for a diaphragm compressor and an oil-gas pressure accompanyingcontrol system for the diaphragm compressor. A diaphragm for an existing diaphragm compressor is a damageable part and needs to be replaced regularly, and the failure rate of a system is increased. The invention provides the oil-gas pressure accompanying control device, the oil-gas pressure accompanying control device comprises a valve cover and a valve body which are connected with each other, apiston is arranged in the valve cover, one end of the piston and the valve cover form a low-pressure oil cavity, the other end of the piston is arranged in the valve body, the valve body and the other end of the piston form an overflow cavity, a valve element is arranged on the valve body and connected with the valve body through a connecting joint, a high-pressure oil inlet channel is arranged in the connecting joint, an oil overflow channel is arranged in the valve element, one end of the oil overflow channel is connected with one end of a blocking assembly, the other end of the blocking assembly is connected with one end of a valve rod, the valve rod is arranged in the valve body, the other end of the valve rod is connected with the piston; and the sectional area of the piston is larger than the area of an overflow channel of the valve element. Safe and stable operation of the diaphragm compressor is facilitated, and the failure rate is reduced.

The application belongs to the technical field of compressors, and in particular relates to a diaphragm compressor oil pressure accompanying control device and a control system thereof. The diaphragm used in the existing diaphragm compressor is a vulnerable part and needs to be replaced regularly, which increases the failure rate of the system. The application provides an oil and air pressure accompanying control device, which includes a valve cover and a valve body connected to each other, a piston is arranged inside the valve cover, one end of the piston forms a low-pressure oil chamber with the valve cover, and the other end of the piston is placed in the valve body. The valve body and the other end of the piston form an overflow chamber, the valve body is provided with a spool, and the valve body and the spool are connected through a connecting joint. One end of the channel is connected to one end of the plugging component, the other end of the plugging component is connected to one end of the valve stem, the valve stem is arranged in the valve body, and the other end of the valve stem is connected to the piston. The cross-sectional area of ​​the piston is larger than the overflow channel area of ​​the spool. It is beneficial to the safe and stable operation of the diaphragm compressor and reduces the failure rate.

The invention provides an intravenous infusion training system based on a VR platform. The system comprises a control host, a display device, a force feedback device and a foot-operated device. The control host is electrically connected with the display device, the force feedback device and the foot-operated device. The display device is used for displaying a venous blood sample acquisition model. The force feedback device is used for sending a first control signal to the control host according to operation of a user so as to carry out intravenous infusion simulation operation on a venous blood sample acquisition injection arm, and receiving feedback information of the control host to carry out force feedback on the user. The foot-operated device is used for sending a second control signal to the control host according to the operation of the user so as to carry out auxiliary operation on the intravenous infusion simulation operation. According to the invention, the intravenous infusion training system is achieved based on the virtual reality technology, so a problem of failure to carry out repeated trainings on invasive experiments in experiment teaching is solved; problems of poor simulation ability, incapability of resisting repeated puncturing, liquid leakage and mildewing of a current model are solved; and the provided system is an innovative and valuable supplement to current teaching modes.

The present invention relates to a shuttle weft insertion apparatus with tracks. The shuttle weft insertion apparatus with tracks comprises a fixed support, heald frames, a reed, a shuttle box and a picking mechanism; The fixed support is also provided with telescoping guide tracks having a non-closed shaped cross section, track telescoping driving mechanisms and linear guide rails; each telescoping guide track comprises a front track entering a shed; a position, close to the tail end, of each telescoping guide track is fixed to a sliding block of the corresponding linear guide rail; and the track telescoping driving mechanisms are fixed to the fixed support, and a piston end of each track telescoping driving mechanism is connected with the tail end of the corresponding telescoping guide track via a connecting piece. According to the shuttle weft insertion apparatus with tracks, upper and lower layer warp yarns in the shed are prevented from extrusion and friction, the shuttle is a conventional large shuttle, the weft storage amount is large, the shuttle is not required to be replaced frequently, and stability of the shuttle flying in the tracks is ensured. When multilayer weavingof composite materials is carried out, weaving efficiency is high, and safe and convenient production can be provided for automatic picking and weft insertion modes of weaving of multilayer prefabricated components of composite materials.

The invention relates to the technical field of screw drivers, in particular to a screw driver with a wire stripper. The screw driver comprises a screw driver head and a handle, wherein the screw driver is characterized by further comprising the wire stripper which is fixed between the screw driver head and the handle. The wire stripper is provided with a plurality of blades. The number of the blades of the wire stripper can be two, and the two blades are arranged in parallel; the number of the blades of the wire stripper can be three, and the three blades are arranged in an included angle of 60 degrees; and the number of the blades of the wire stripper can be four, and the four blades are arranged in an included angle of 90 degrees. The screw driver with the wire stripper has the beneficial effects that the screw driver integrates the rotating function and the wire stripping function of the screw driver after the wire stripper is arranged between the screw driver head and the handle; the structure is simple, so that the tools do not need to be frequently changed, and the screw driver is convenient to operate; and the number of the blade of the wire stripper can be two, three, four or more, so that the screw driver can be used for stripping a plurality of conductors.

The invention relates to a device used for energy storage heating, sterilizing and PM2.5 reducing through off-peak power and used for a small-sized apartment. A unique three-chamber combination module is adopted, and the device comprises an equipment shell, a first-stage draught fan, a balancing chamber, a second-stage draught fan, a wind distributing passageway, a front normal-temperature wind passageway, a rear normal-temperature wind passageway, a left normal-temperature wind passageway, a right normal-temperature wind passageway, a left rising pre-heating chamber, a right rising pre-heating chamber, a falling heat storage chamber, an electric heating chamber, an electric heating element, an acid fire-resistant material heat storage body, an alkaline fire-resistant material heat storage body, a long heat-resistant steel bar, a short heat-resistant steel bar, a phase-change heat storage body, a left heat-resistant steel partition plate, a right heat-resistant steel partition plate, a device bottom plate, a heat storage box bottom plate, a wind distributing passageway bottom plate, a wind distributing passageway front side plate, a wind distributing passageway rear side plate, a device top plate, a heat storage box top plate, a warm wind passageway, a warn wind spraying guiding plate, an intelligent-control power supply box, various heat-resistant steel partition plates and the like. According to the device used for energy storage heating, sterilizing and PM2.5 reducing through the off-peak power and used for the small-sized apartment, heating can be achieved all day long by using the off-peak power, the functions of high-temperature burning, high-temperature adsorbing combination, transverse heat transmission and waste heat recovering are further achieved, indoor air can be thoroughly purified without cost, secondary pollution is not generated, and the device is suitable for indoor energy storage heating and air purifying in winter.

The invention discloses a large turntable bearing assembly workbench. The large turntable bearing assembly workbench comprises a plurality of guide rails, movable square boxes and a plurality of supporting members, wherein the multiple guide rails are uniformly distributed on the ground along the circumferential direction; each guide rail is provided with the corresponding movable square box; eachmovable square box is provided with the corresponding supporting member; and the supporting members are in contact with the end faces of bearings and support the bearings. According to the large turntable bearing assembly workbench, the workpieces can be away from the ground and the impurities such as iron chips, grinding wheel surfaces and the like; the fitting precision is improved; the movablesquare boxes are movably arranged; bearings with different diameters can be detected; the workbench does not need to be frequently replaced; the structure is simple; and the operation is easy.

The invention discloses a small-diameter intensive tube bank weld junction grinding device and method. The device comprises a handpiece, a driving mechanism,grinding wheels, and driven wheels, whereinthe inside of the handpiece is containing space for containing a motor; the motor is connected with the driving mechanism to provide driving force for the driving mechanism; the grinding wheels are connected with one side of the driving mechanism which drives the grinding wheels to rotate through the driving mechanism; the driven wheels are connected with the other side of the driving mechanism;the motor axis is perpendicular to the grinding wheel axis; power output by the motor is made a vertical turn by matching the driving mechanism and the motor, and the power is output to the grinding wheels. The small-diameter intensive tube bank weld junction grinding device is compact in structure, with own radian, small in volume, light in weight, easy to carry, and especially suitable for the grinding of the small-diameter intensive tube bank in the construction site, so that the mechanical grinding of a narrow-gap weld junction is achieved.

The invention relates to a cold cathode spot lamp, comprising a lamp holder. The lamp holder is internally provided with an inverter; the lower end of the lamp holder is fastened with a cold cathode fluorescent lamp component which is connected with the inverter; in the cold cathode fluorescent lamp component, the upper end of a plastic piece is fastened with the lamp holder; a cold cathode fluorescent lamp tube and a spot lamp cup outside the cold cathode fluorescent lamp tube are arranged at the lower end of the plastic piece; and an electrode of the cold cathode arc fluorescent lamp tube is connected with the output end of the inverter. By utilizing the cold cathode spot lamp, the defects of the existing energy-saving lamp or filament lamp can be defected, the provided light is stable,the color rendering property is good, the stroboflash and flicker phenomena are avoided, the vision can be effectively protected, the service life is long, the energy is saved, the environment is protected, the maintenance is simple, and the energy consumption is low.

The invention relates to an upper beam moving device of a motor shaft-pressing hydraulic press. The upper beam moving device comprises a moving motor, a gear box, an upper beam, transition shafts, upright columns, upright column nuts, gear and worm seats and gear and worm components; the upright columns are respectively arranged at the four corners of the upper beam; the upright column nuts are arranged on the upright columns; the gear and worm seats are arranged on the upright column nuts; the gear and worm seats are rotationally matched with the upright column nuts; the gear and worm seats are fixed to the upper beam through screws; the gear and worm components are arranged on the upright column nuts; the moving motor is arranged on the upper beam between the two upright columns; the front end of the moving motor is connected with the middle of the gear box; and the two ends of the gear box are connected with the gear and worm components at the upper parts of the upright columns through the transition shafts respectively. The upper beam moving device has the advantages that the design is ingenious; the structure is reasonable and compact; when a user customizes a press, no stroke is excessively long; the height (opening) of the upper beam is adjusted according to the length of a shaft; no tool is required to be replaced frequently when a long shaft and a short shaft are pressed; and the efficiency and the cost are improved and reduced.

The invention relates to a reversing color-changing lamp which solves problems that the traditional changing lamp shines only when falling towards a direction and the color of the lamp is changeless. In the invention, a luminous body is arranged in a lamp shade; the luminous body comprises gravity switches and light-emitting diodes; a plurality of light-emitting diodes (2) connected in series arespliced on a circuit board (1) of the luminous body; each group of light-emitting diode circuits connected in series is connected to the positive pole and the negative pole of a power supply (4) in parallel; a common switch and a multidirectional ball gravity switch (5) which are connected in series are arranged at the positive pole or the negative pole of the power supply; the long axis of the multidirectional ball gravity switch (5) is vertical to the circuit board (1); the circuit board (1) is peripherally provided with a plurality of unidirectional ball gravity switches (3), long axes of which are arranged on the circuit board or parallel to the flat surface of the circuit board; and each unidirectional ball gravity switch (3) is connected with a group of light-emitting diode series circuit in series.