58results about How to "On and off quickly" patented technology

The invention discloses a solar energy and commercial power complementary uninterrupted power supply system. The system comprises a commercial power system and a solar photovoltaic power supply system, wherein the commercial power system comprises 220V commercial power and a rectification circuit connected with the commercial power; the solar photovoltaic power supply system comprises a solar cell plate, an overcharge protective circuit, a storage battery, an under-voltage signal circuit, an overdischarge protective circuit, a PWM inversion circuit, a rectification circuit and a switching circuit which are orderly connected in series; the switching circuit consists of a diode and a VMOS tube, wherein an input end of the diode is connected with an output end of the overdischarge protective circuit, and an output end of the diode is connected with G pole of the VMOS tube, and D pole of the VMOS tube is connected with electric loads. Because the quick on-off of the VMOS tube in the switching circuit is realized by utilizing DC, the system realizes the quick switch between the commercial power system and the solar photovoltaic power supply system, and the switch time reaches ms level, thereby not causing loads to restart and ensuring the safety of all loads.

The invention discloses a high-voltage direct-current circuit breaker based on double switches. The high-voltage direct-current circuit breaker comprises a semi-conductor switch tube, a switch tube control optocoupler, a switch tube control resistor, an isolation power supply, a relay control resistor, a relay control optocoupler and a double-pole double-throw relay. The semi-conductor switch tube is connected with a positive end of a high-voltage direct-current power transmission line in series. The double-pole double-throw relay has two accesses, one access is connected with the positive end of the high-voltage direct-current power transmission line in series and connected behind the semi-conductor switch tube in cascade mode, and the other access is connected with a negative end of the high-voltage direct-current power transmission line in series. The output ends of the two accesses of the double-pole double-throw relay are respectively the output positive end and the output negative end of the high-voltage direct-current power transmission line. Connection and disconnection of the semi-conductor switch tube are controlled by the switch tube control optocoupler, and connection and disconnection of the two accesses of the double-pole double-throw relay are controlled by the relay control optocoupler. The circuit breaker is small in size, fast in connection and disconnection, free of leakage current and safe and reliable to use.

The invention relates to a gene sequencer, a liquid path system and an automatic detection method thereof. The liquid path system of the gene sequencer comprises a power mechanism, a tray, an extraction mechanism, a reaction chip and a waste liquid bottle. The power mechanism comprises an injection pump and a selecting valve connected to the injection pump; the extraction mechanism comprises a rotary valve and a plurality of extraction needles, and the rotary valve is connected to the selecting valve to form a reaction channel. The plurality of extraction needles are arranged to be inserted into reagent slots in the tray, separately. The reaction channel is connected to any one extraction needle through the rotary valve. The reaction chip is arranged on the reaction channel, and the wasteliquid bottle is connected to the selecting valve to form a waste liquid channel. The liquid path system of the gene sequencer is simple in structure. By switching the rotary valve, the injection pumpcan suck different reagents to the reaction chip for a biochemical reaction. Compared with a conventional three-dimensional mechanical arm, the rotary valve is controlled to switch more simply, so that the sequencing efficiency can be improved.

A rocker switch of the present invention includes a driving member, a follower, and a driving elastic member. When a button is pressed, the button can push the driving member to rotate, and a lockingmember stops the rotation of the follower. As the driving member rotates, the stationary follower provides a continuous elastic force to the driving elastic member. When the driving member rotates until the elastic force of the driving elastic member is greater than the blocking force of the locking member to prevent the follower from rotating, the driving elastic member can drive the follower torotate, the elastic force of the driving elastic member is released instantaneously so as to drive the follower to rotate rapidly, and the follower pushes a movable contact to move rapidly so that themovable contact rapidly contacts a fixed contact or quickly separates from the fixed contact, thereby enabling the rocker switch to be quickly switched on and off. The purpose of this is to significantly extend the life of the rocker switch, the quick on-off of the rocker switch is independent of the operation speed of the hand or the handle or the button, and better stability and stronger reliability are achieved.

The invention provides a split floor type air conditioner which comprises an indoor unit, an outdoor unit and a temperature detection device. The indoor unit is provided with an indoor heat exchanger, a throttling device, a compressor and an indoor fan. The outdoor unit is provided with an outdoor heat exchanger and an outdoor fan. The indoor heat exchanger, the throttling device, the outdoor heat exchanger and the compressor are circularly communicated through connection pipelines to form a refrigeration loop. The temperature detection device is arranged on the connection pipeline between the throttling device and the outdoor heat exchanger, electrically connected with a master control circuit board and used for detecting the temperature of a coiled pipe of the outdoor heat exchanger. The master control circuit board controls the running states of the compressor, the indoor fan and the outdoor fan according to the temperature of the coiled pipe of the outdoor heat exchanger and / or the outdoor environment temperature of the outdoor unit. The outdoor environment temperature is obtained by calculation according to the temperature of the coiled pipe of the outdoor heat exchanger. According to the technical scheme, the production cost is decreased while the placement stability of the indoor unit is improved, the outdoor environment temperature is obtained through calculation of the temperature of the coiled pipe of the outdoor heat exchanger, and then the running state of the air conditioner is controlled.

The invention relates to a method for rapidly detecting on-off and positioning of an optical cable. At least one first intelligent service disc in a first intelligent sub-frame unit of first intelligent wiring equipment is provided with a first intelligent optical path detection disc formed by an intelligent optical transceiver module and an optical path processing module; a second intelligent optical path detection disc formed by the intelligent optical transceiver module and the optical path processing module is arranged in at least one second intelligent service disc in a second intelligentsub-frame unit of second intelligent wiring equipment; an optical cable is connected to the corresponding first intelligent optical path detection disc and the second intelligent optical path detection disc to establish communication optical paths; an one-core optical fiber in the same optical path cable serves as a detection optical fiber used for establishing a detection optical path; a networkmanagement control unit is in interactive communication and management with the first intelligent wiring equipment and the second intelligent wiring equipment; the network management control unit isstarted for real-time detection, an optical signal of the detection optical fiber is detected and the optical path with the cable on-off fault is positioned. According to the method, rapid detection and positioning of on-off of the optical cable between equipment nodes can be realized, the maintenance operation can be rapidly carried out, and the maintenance cost is reduced.

The capacitor switch monitor system based on SCM and configuration comprises: an up machine of IPC to provide visual menu for online modifying system parameter and displaying running state, and a down machine with high-performance SCM chip as control kernel and high-resolution A / D converter to improves precise and speed for data treatment. This invention realizes automatic fast switch to a plurality of capacitors reduces network loss, and improves power quality.

A control circuit for driving a relay to be rapidly switched on and off comprises a relay, a first node of a coil of the relay is connected with a power supply through a boosted circuit, a second nodeof the coil of the relay receives a relay driving signal through a switch control circuit, and the boosted circuit comprises a PNP type triode, a first resistor, a second resistor, an energy storagecapacitor and a first diode. An emitter of the PNP type triode and the anode of the first diode are connected with a power supply, the base of the PNP type triode is connected with the power supply through the first resistor, the collector of the PNP type triode and the cathode of the energy storage capacitor are grounded through the third resistor, and the cathode of the first diode and the anodeof the energy storage capacitor are connected with the first node of the coil of the relay. The switch control circuit comprises an NPN type triode and a fourth resistor, the base electrode of the PNP type triode is connected with the collector electrode of the NPN type triode and the second node of the coil of the relay through the second resistor and a voltage stabilizing tube, the base electrode of the NPN type triode receives relay driving signals through the fourth resistor, and the emitting electrode of the NPN type triode is grounded.

The invention discloses a refrigerator door switch which comprises a base, wherein a button is arranged at the upper end of the base, a mounting hole is arranged in a base cavity, a torsional spring is arranged in the mounting hole, a torsional spring arm on the torsional spring is abutted against the lower end of the button, a fixed terminal is arranged at one side of the bottom in the base cavity, a static contact is arranged on the fixed terminal, a movable reed is arranged at the other side of the bottom in the base cavity, a movable contact which is matched with the static contact is arranged on the movable reed, a terminal is arranged at one end of the movable reed which leads the base out, the other end of the movable reed is mutually matched with one end of a positioning pin in the base cavity, an arc-shaped demising groove and a contact boss are arranged on one end of the positioning pin which is mutually matched with the movable reed, the other end of the positioning pin is connected with the lower end of the button, and a cover plate is arranged on a base cavity hole. The invention has the advantages of prolonging the service life of the refrigerator door switch and ensuring that the on-off stroke of the refrigerator door switch is reduced and the on-off switching is fast.

The invention discloses a foam pump. An air cylinder, a hydraulic cylinder and a liquid feeding valve seat are integrally arranged in a pump body; an elastic pressing assembly comprises a piston rod assembly with a liquid channel, a piston assembly and an all-plastic closed spring; the piston assembly comprises an air compression piston assembly with an air inlet and air supply structure and a liquid compression piston; the upper end of the piston rod assembly is movably connected with the air compression piston assembly in an opening and closing mode; an air-liquid confluence channel is formed between the upper end of the piston rod assembly and the air compression piston assembly; the lower end of the piston rod assembly is movably connected with the liquid compression piston in an opening and closing mode; the all-plastic closed spring sleeves the piston rod assembly and is pressed in the air cylinder through the piston rod assembly; a plurality of spring air compression structuresare formed in the compression process of the all-plastic closed spring; the all-plastic closed spring and the air compression piston assembly form a double-air-compression structure; and the air compression piston assembly, the piston rod assembly, the all-plastic closed spring and the liquid compression piston are combined to form an integrated linkage type air compression and liquid compressionreset mechanism. The double-air-compression structure has a good foaming effect.

The invention relates to an extrusion coating machine and a coating system thereof, wherein the coating system comprises an extrusion head and a control valve, a valve body of the control valve comprises a three-way valve and a two-way valve, the first end of the three-way valve is the feed end, the second end is connected with a return port, the third end is connected with one end of the two-way valve, the other end of the two-way valve is connected with the extrusion head, a return valve core and a return opening and closing valve are arranged in the second end of the three-way valve, the return opening and closing valve is arranged on the return valve core, the return valve core is connected with a driving device thereof, a feed valve core and a feed opening and closing valve are arranged in the two-way valve, the feed opening and closing valve is arranged on the feed valve core, and the feed valve core is connected with the driving device thereof. The costing system has simple structure and convenient control, and can realize the gap coating and improve the gap coating quality of the extrusion coating machine; furthermore, the valve body is convenient to clean and the process applicability to lithium ion batteries is quite good.

The invention relates to an online adjusting system for a beam current intensity in a central area of a proton cyclotron, which belongs to the field of proton cyclotrons. The online adjusting system is characteized in that an axial deflection plate and an axial collimator are respectively arranged in two high-frequency cavity head parts which form an angle of 180 degrees in the central area of theproton cyclotron, the axial deflection plate is connected with a power supply arranged outside the cyclotron by virtue of a cable, the voltage on the axial deflection plate is adjusted, so that the beam current is axially deflected, particles with excessively large deviation are lost on the axial collimator, and a function for online adjusting the beam current intensity can be realized. The online adjusting system have the advantages of simple structure, high reaction speed and high reliability, and can improve the beam current intensity adjusting efficiency.

The invention discloses an IGBT driving circuit module and belongs to the field of power electronic devices. The IGBT driving circuit module includes an IGBT driving voltage circuit and an optocouplerisolation driving control circuit. The IGBT driving voltage circuit is used for generating positive and negative driving voltages. The optocoupler isolation driving control circuit is used for performing isolation driving on an IGBT. The IGBT driving voltage circuit is a flyback circuit composed of a PWM controller. The optocoupler isolation driving control circuit includes an optocoupler isolation circuit and an IGBT driving circuit. In the IGBT driving circuit module provided by the invention, the IGBT driving voltage circuit generates the positive and negative driving voltages, the fast switch-on and switch-off of the IGBT can be achieved, the IGBT adopts optocoupler isolation driving and has a wide application range, the circuit adopts modularization design, and the circuit is simple.

The invention discloses a double-page or multi-page paper sheet detecting device of a collating machine, comprising an induction mechanism, a connecting plate (15), a main frame (7) and a rotating wheel mechanism. The rotating wheel mechanism comprises a shaft (14), a bearing (18), a spring (12), a spring seat (10) and a rotating wheel (4), wherein the rotating wheel (4) has the front-side outlinematched with an excircle shape of a paper holding rolling drum of the collating machine and is provided with a gap; the shaft (14) is fixed on the connecting plate (15); an inner ring of the bearing(18) is sleeved on the shaft (14); the rotating wheel (4) is sleeved on an outer ring of the bearing (18); one end of the spring (12) is propped into a groove positioned at the rear side of the rotating wheel (4), and the other end is propped into a groove positioned at the front side of the spring seat (10) arranged on the connecting plate (15); the lower side outline of the rotating wheel (4) supports against the induction mechanism, and the rear end of the rotating wheel (4) is provided with a circumferential spacing mechanism. The double-page or multi-page paper sheet detecting device haslow cost and high sensitivity, and the size of a gap positioned between the rotating wheel and the paper holding rolling drum can be adjusted in real time with paper sheets with different thicknesses.

The invention discloses a low-power consumption door lock button. The low-power consumption door lock button comprises a base, a reset spring fixed to the base, a printed circuit board (PCB) fixed to the base, a button body connected to the reset spring, induction coils arranged on the PCB and microswitches arranged on the PCB. The induction coils are connected with an external door lock main control panel. The PCB is connected with an external battery device. The top end faces of the microswitches are provided with touch points and connected with elastic pieces. A button head extrudes the elastic pieces. Due to the arrangement of the microswitches, the microswitches are switched on when the button head is pressed down, and the PCB connected with the battery device is powered on and activated to be in a working state; when the button head is not pressed, the microswitches are off, the PCB is not powered on, and the door lock button is in a sleeping state temporarily. Accordingly, the purpose for reducing the power consumption is achieved, the service life of a door lock and the battery device is prolonged, and the function for reducing the cost is achieved.

The invention provides a rotary digital valve. The rotary digital valve comprises a valve sleeve, a left valve core and a right valve core, wherein the left valve core and the right valve core can move axially left and right and are arranged in the valve sleeve in a synchronous rotating manner; the valve sleeve is provided with a left feed hole and a right feed hole; the circumferential surface of the left valve core is provided with a periodically distributed left receiving groove array, and the left receiving groove array is communicated with a left feeding passage; the circumferential surface of the left valve core is provided with a periodically distributed right receiving groove array, and the right receiving groove array is communicated with a right feeding passage; the proportional output quantity of the left feeding and the right feeding depends on the mechanical duty ratio formed by axial movement displacement of the left valve core and the right valve core; the opening and closing frequency of the rotary digital valve is equal to the product of the rotation speed of the synchronous rotation of the left valve core and the right valve core and the number of grooves in the left receiving groove array or the right receiving groove array. According to the rotary digital valve, high frequency response and accurate feeding can be realized through quick switching of the rotary valve core and proportional output of the double valve cores; the rotary digital valve can be applied to 3D (Three Dimensional) printing equipment.

The invention discloses a power supply transfer junction box, which comprises a box body with a detachable upper cover. Multiple groups of plug interfaces are formed in the upper cover; the inner bottom surface of the box body is provided with multiple rectangular slots; each of two inner sides of the rectangular slot is provided with at least one copper sheet slot for placing a copper sheet; the copper sheet slot is internally provided with a plug interface passing through the bottom surface of the box body; a slide switch is arranged in the middle of the copper sheet slots at two sides; the slide switch moves vertically to contact the copper sheet, and thus, on or off of circuits at two sides is achieved; and a rail for enabling the slide switch to slide is arranged on the box body. According to the power supply transfer junction box provided in the invention, line transfer from normal mounting to unconventional mounting can be quickly realized, cutting of a motor lead can be effectively avoided, various problems caused by cutting of the lead are not generated, the power supply line reliability is improved; and besides, when the power supply transfer junction box is applied, an unconventional test can be carried out in any safety distance, occurrence of personal accidents is avoided, operation by a tester is facilitated, and system test requirements are met.

The invention provides a novel low-flow-gas push button valve which comprises a valve body, wherein a deep cavity is formed in the valve body; the end part of the deep cavity is in threaded connectionwith a valve cap; the valve body is perpendicular to the deep cavity, and a first cavity and a second cavity are respectively formed in two symmetric sides; a position, which is close to the bottom,of the first cavity is connected with a conical cavity; a gas outlet hole communicating with the deep cavity is formed in the conical cavity; the bottom of the second cavity is provided with a gas inlet hole communicating with the deep cavity; a baffle plate is arranged at one end, which is close to an inner cavity of the valve cap, of a valve rod; a sealing ring is also arranged at one end, whichis far away from the valve cap, of the valve rod; two ends of the sealing ring are connected respectively through a first gas barrier plate and a second gas barrier plate; a conical sliding block isarranged on the second gas barrier plate; and a spring is arranged between the bottom of the deep cavity and the conical sliding block. By simple structural matching, quick opening and closing of thenovel low-flow-gas push button valve provided by the invention are realized, and the flow is relatively low; and the whole valve is relatively high in stability, has a self-breakage function and is higher in safety, and the life of the novel low-flow-gas push button valve is prolonged.

The invention belongs to the technical field of steam oven accessories, in particular to an automatic cavity displacement control system and an exhaust cooling system. The system comprises an exhaustcylinder which is arranged on a steam oven body and is provided with an exhaust hole for exhausting, the exhaust fan is movably arranged above the exhaust cylinder; an adjusting plate is used for controlling the opening and closing of the exhaust hole in the moving process; and a driving device is connected with the adjusting plate and drives the adjusting plate to move, a covering part is arranged on the adjusting plate, a covering part is driven by the driving device to move above the exhaust hole, and the size of the exhaust hole is changed through the covering degree of the covering part on the exhaust hole so as to achieve adjustment and control over the exhaust amount. The size of the exhaust hole can be adjusted by controlling the degree that the adjusting plate covers the exhaust hole, so that the exhaust amount is controlled, and higher energy efficiency can be achieved when the hole diameter is reduced; when the exhaust hole is adjusted to a large hole diameter, steam discharge can be accelerated, and water remaining in the inner container is reduced.

The invention relates to the technical field of microbial fertilizer fermentation, and provides a microbial fertilizer fermentation machine and a microbial fertilizer fermentation process, the microbial fertilizer fermentation machine is provided with a plurality of fermentation tank bodies, the placement, fermentation and discharge of microbial fertilizers in the plurality of fermentation tank bodies are not mutually influenced, the preparation efficiency of the microbial fertilizers is high, and the production cost is low. The microbial fertilizer fermentation device is simple in structure and convenient to operate, the fermentation period can be well guaranteed, control and guarantee of the fermentation quality of microbial fertilizer are achieved, meanwhile, the multiple fermentation tank bodies are switched conveniently and smoothly, practicability is good, the microbial fertilizer fermentation device comprises smashing equipment and the multiple fermentation tank bodies, screening equipment is arranged on the right side of the smashing equipment, and granulation equipment is arranged on the right side of the screening equipment; cooling equipment is arranged on the right side of the granulation equipment, the carrier frame comprises a bottom bracket, a bottom frame is rotationally connected to the bottom bracket, a driving device for driving the bottom frame is mounted on the bottom bracket, the fermentation tank bodies are all mounted on the bottom frame, a center frame is connected to the bottom bracket, and a mounting frame is connected to the top end of the center frame.

The invention relates to an online adjusting system for a beam current intensity in a central area of a proton cyclotron, which belongs to the field of proton cyclotrons. The online adjusting system is characteized in that an axial deflection plate and an axial collimator are respectively arranged in two high-frequency cavity head parts which form an angle of 180 degrees in the central area of theproton cyclotron, the axial deflection plate is connected with a power supply arranged outside the cyclotron by virtue of a cable, the voltage on the axial deflection plate is adjusted, so that the beam current is axially deflected, particles with excessively large deviation are lost on the axial collimator, and a function for online adjusting the beam current intensity can be realized. The online adjusting system have the advantages of simple structure, high reaction speed and high reliability, and can improve the beam current intensity adjusting efficiency.

The invention discloses a water circulation monitoring control device with a flow display function and a welding robot. The water circulation monitoring control device comprises a framework, flow sensors and a control panel; the control panel comprises a signal processing circuit and a display unit; and the flow sensors, the signal processing circuit and the display unit are arranged in the framework, the flow sensors are used for monitoring the water flow, the signal processing circuit is used for generating flow information according to the monitoring signal, then the flow condition is displayed in real time by the display unit, and thus the flow condition can be mastered in real time via an observation window in the control panel. By means of the water circulation monitoring control device with the flow display function and the welding robot, the on / off state and flow of water circulation can be controlled and monitored in real time, water can be quickly controlled to flow or stop,and thus the situation that cooling water leaks out to pollute and even damage surrounding facilities is avoided.

The invention discloses a saturated steam valve. A valve element is installed in a cylinder barrel in a sliding manner through a second spring seal. The left side of the valve element is sequentiallysleeved with a spring, a spring seat, a lining and a left end cover. The right side of the valve element is sequentially sleeved with a lining and a right end cover. Each lining and the cylinder barrel are matched with each other through a seam allowance and sealed through a third spring seal. Each lining and the valve element are sealed through fourth spring seals and an O ring. The linings are both matched with the left end cover and the right end cover through seal allowances, and seal between the linings and the left and right end covers are achieved through first spring seals. A seal gasket is installed in the right end cover. The seal gasket and the end face of the valve element are sealed. The saturated steam valve adopts the structures of the spring seals and the O rings, and airtight seal between the seal pieces and the valve element and between the seal pieces and the linings can be guaranteed; the hard seal combination face between the dual-phase stainless steel valve element and the red copper seal gasket is small and good in rebound resilience, has excellent temperature resistance, corrosion resistance and the like, and it can be guaranteed that the valve is reliably opened and closed and free of internal leakage.

The invention discloses a granular feed granulator. The granulator comprises a host driven by a main motor and a control system. The front side of the host is provided with a feed pipe. A feeder is arranged above the feed pipe. The feeder comprises one transverse feeding tube and a feeding screw installed in the feeding tube. The rear end top of the feeding tube is connected to a proportioning binthrough a proportioning pipe, and a front end bottom is connected to the upper end of the feed pipe through a connection pipe which is arranged in an inclined mode. The two ends of the feeding screware installed on the two ends of the feeding tube through a bearing and a feeding motor installed on one side of the rear portion of the feeding tube is used to drive. The feeding tube is connected toa steam pipe. The steam pipe is equipped with a pneumatic steam valve. Through the above structure, the humidity of the granulator is increased through adding steam before the granulator carries outextrusion forming, forming becomes convenient, through the pneumatic steam valve, rapid on-off steam can be performed conveniently so that the steam is controlled according to a feed quantity, a reasonable water content is reached, and granulation stability is increased.

The invention belongs to pneumatic switch valves and in particular discloses an external control pilot type high-pressure pneumatic electromagnetic switch valve which mainly comprises a main valve body, a direct current electromagnet and a working port connector; a pilot valve is arranged on one side of the main valve body; a cavity is formed in the main valve body, communicates with a through hole, a working hole and an air inlet formed in the main valve body separately and is also provided with a control hole individually to communicate with a valve hole of the main valve body; a main valve element is arranged in the cavity and is provided with an opening control valve to communicate with the through hole; and a pilot valve element is pushed through power on and power off of the direct current electromagnet, and the main valve element can be pushed to move with matching of the action of high-pressure gas and an elastic element, thus the purpose of on-off of gas is realized. According to the external control pilot type high-pressure pneumatic electromagnetic switch valve, the sealing performance is good, and the electromagnetic valve can be ensured to have weaker opening pressure by adopting an external control type structure, thus rapid on-off of the high-pressure gas is realized. In addition, the external control pilot type high-pressure pneumatic electromagnetic switch valve is of a simple structure, is convenient to process and is suitable for large-scale industrialized manufacturing.

The invention discloses a device for detecting a storage battery through timing discharge under PWM (pulse width modulation) control. The device comprises a DSP (digital signal processor), a PWM high-frequency signal circuit, a PWM low-frequency signal circuit, an on-off logic judgment circuit, an electromagnetic isolation circuit, an FET (field effect transistor) discharge circuit, a set current analog output circuit and a discharge current detection feedback circuit. According to the device, the DSP is utilized to emit high-precision PWM signals, meanwhile, fast on-off of multiple groups of FETs are controlled, so that the storage battery realizes output of constant current close to short circuit current instantaneously, and the performance condition of the storage battery is judged through rapid detection for a current peak and attenuation change by the DSP. The device can detect the storage battery at any stage in the life cycle, and with the adoption of the DSP, PWM control signal precision and current detection precision both guarantee accuracy of a detection result and universality of a detection range. Due to extreme short conduction time, little heat is generated, and repeated continuous detection can be realized.

The invention relates to a lighting device for signalling on and identification and marking of airport traffic areas, e.g. take-off runways, landing runways, taxiways and the like. Said device has light sources (1) for direct emission of visible light. To reduce energy consumption and maintenance costs for said lighting devices, it is proposed that the light sources take the form of semiconductor components.

The invention belongs to a pneumatic switching valve, and particularly discloses a pilot-operated type high-pressure pneumatic electromagnetic switching valve. The pilot-operated type high-pressure pneumatic electromagnetic switching valve mainly comprises a main valve body, a direct current electromagnet and a working opening connecting piece. A pilot-operated valve body is arranged on one side of the main valve body. A cavity is formed in the main valve body and communicates with a through hole, a working opening and an air inlet in the main valve body. The air inlet further communicates with a valve opening in the main valve body through an auxiliary hole set. The cavity is internally provided with a main valve element. The main valve element is provided with an open control cavity communicating with the through hole. A pilot-operated valve element is pushed through powering-on and powering-off of the direct current electromagnet, the main valve element can be pushed to move through cooperation with the actions of the high-pressure gas and elastic elements, and accordingly the purpose of gas supply starting and stopping is achieved. The pilot-operated type high-pressure pneumatic electromagnetic switching valve is good in sealing performance, simple in structure, high in work pressure, convenient to machine and suitable for large-scale and industrial manufacturing.