70results about How to "Realize security protection function" patented technology

The invention discloses an electromagnetic wedge-shaped bidirectional rope gripper which solves the problems that the rope gripper of the prior art cannot automatically reset after an action or stop the unplanned movement of an elevator. The electromagnetic wedge-shaped bidirectional rope gripper comprises a box body, a wedge-shaped guide body and wedge components; and the technical point is that: the wedge components are movably assembled on a slide rail of the wedge-shaped guide body through a sliding guide frame; the end parts of the two wedge components are assembled on a linkage support seat which is connected with the core of an electromagnet at the outer side of the box body, thus forming a group of unidirectional gripping devices; the upper and lower groups of symmetrically-arranged unidirectional gripping devices form a bidirectional stop gripping mechanism; and an ejector rod of an ascending outage automatic locker is supported at the bottom of the wedge components of the upper groups of unidirectional gripping devices. The electromagnetic wedge-shaped bidirectional rope gripper is reasonably designed, has a compact structure and a small volume, saves the installation space, is convenient to install, realizes adjustable braking force and automatic reset, ensures steady and reliable braking, is used for gripping the elevator dragging wire rope when the elevator is in an ascending or descending overspeed state, and can meet the standard requirement on protection of preventing unplanned movement.

The invention discloses a sealed culture dish which comprises a dish bottom and a dish cover which can be tightly buckled with the dish bottom, wherein the dish bottom comprises a bottom wall and dish bottom side walls; the dish cover comprises a cover wall and dish cover side walls; friction sealing devices are arranged on contact surfaces of the dish bottom side walls and the dish cover side walls, so that the air tightness of the contact surfaces can be defined. Through holes or small holes are formed in the cover wall, a micro-hole filtering membrane and a hole plug are arranged in the through hole, or a filter is arranged in the small hole through a leather collar, a structure defined according to the condition is used as a gas exchange channel, the stability of an air component in a cavity of the culture dish is maintained, the balance of internal and external air pressure is maintained, the burst of the dish bottom and the dish cover is prevented, air flowing through can be filtered, a harmful gas solution such as thallus or spore of pathogenic microorganisms in the culture dish is prevented from passing or diffusion pollution, and the security of operators is ensured.

A hydraulic control system for the locating unit of dredger is composed of two one-way valves, two shuttle valves, two overflow valves, electromagnetic diverter valve, two locking one-way valves, proportional throttle valve, and five logic one-way valves. It can control the hydraulic cylinder of locating pile to realize accurate location of dredger and adjustable moving speed, and can also protect the dredge when external force is too great.

The invention discloses a safety protection circuit of a microwave oven. The safety protection circuit comprises a current detector used for detecting a working current of a heating device of the microwave oven, a first switch unit used for controlling an AC (Alternating Current) mains supply to be input to the heating device and connected between the AC mains supply and the heating device, a safety protection switch unit connected between the AC mains supply and the heating device, and a controller connected with the current detector, the first switch unit and the safety protection switch unit, wherein after the controller controls the first switch unit to be switched off, and if the current detector detects that the working current is greater than a preset value, the controller controls the safety protection switch unit to cut off the AC mains supply input to the heating device. The safety protection circuit can cut off the power source of the heating device when contact fusion of a relay in the first switch unit occurs, so that safety hazard caused by continuous heating of the heating device is prevented. The invention also discloses a microwave oven and a safety protection control method of the microwave oven.

The invention discloses an engineering machinery walking speed controlling and switching valve. Oil inlet channels and oil outlet channels of two motors are formed in the same one valve body. By means of the switching valve structure design and the system matching design, the speed can be switched and adjusted on the work condition where an actuating device can normally work and is not shut down. Thus, a speed regulating range of engineering machinery hydraulic speed control is widened, and stepless speed change is achieved. The engineering machinery walking speed controlling and switching valve is simple in engineering machinery speed switching opening, stable in speed switching, free of impact in speed switching and capable of prolonging the service life of a hydraulic system. The engineering machinery walking speed controlling and switching valve integrates a serial connection function and a parallel connection function of a hydraulic motor system, so that the integration level is high. Meanwhile, a safety valve can be integrated on the switching valve to achieve a safety protection function of a system work circuit.

The invention discloses a logistics intelligent comprehensive service device for a power supply company of a power grid. The device comprises a logistics intelligent comprehensive service system. Thelogistics intelligent comprehensive service system comprises an equipment management unit, a property management unit, a vehicle management unit, a guard management unit, a welfare service unit, a catering management unit, an announcement publicity unit and a dormitory management unit. All units are independently and separately arranged. A system login unit and an authority management unit are further arranged. In this way, the safety protection function of the system is achieved, and the normal operation of the system is guaranteed. The all-directional management of the logistics service of the power supply company of the power grid is realized. The device of the invention further comprises an opinion feedback module, and the opinion feedback module is used for the staff to bring forwardopinions and suggestions. Therefore, the logistics service system can be perfected. According to the invention, a data information interface and a user operation interface are combined, so that the logistics service and the WEB are combined. The intelligence of the logistics service is realized.

The invention discloses a tower for a multi-rotor wind generating system. The tower comprises a lower tower (1), an upper tower (2) and a rotary driving device (3), wherein the rotary driving device is arranged between the upper tower and the lower tower. The tower has the advantages that: (1) the rotary driving device arranged in the middle of the towers can integrally rotate a plurality of wind turbines arranged to fulfill the aims of wind facing, casting off and safe protection and ensure that the plurality of wind turbines cannot influence one another in the wind direction and partial wind turbines cannot be positioned in wake flow areas of other wind turbines, or towers or beams so as to furthest utilize wind energy; (2) a slewing bearing or a rotary driving device in a cabin in the prior art is eliminated; because the rotary driving device is arranged between the upper tower and the lower tower realizes wind facing, yawing and safe protection functions, the slewing bearing or the rotary driving system is not required to be arranged in a cabin of a single wind turbine; and (3) the cost of the tower is reduced.

The invention discloses a safety valve. The safety valve comprises a valve body, a base, a valve element, a spring, a valve seat, an air inlet joint and a sealing ring, wherein the opening end of thebase is in threaded connection with the valve body to form an inner cavity, a step-shaped inner cavity is formed in the base, the valve element is inserted into the inner cavity formed by the valve body and the base, the valve element and the sealing end of the base are sealed through the sealing ring, the spring is embedded in an inner cavity between the small-diameter end of the valve element and the opening end of the base, the valve seat is embedded into the valve body in a sleeved mode and is positioned through the step-shaped structure, a double-cone seal is adopted at the edge contact position between the valve seat and the large-diameter end of the valve element, the air inlet joint is connected into the edge of a port of the valve body in a threaded mode, at least one air outlet is formed in the valve body, the valve element pushes the spring to compress under the action of pressure, and a medium is discharged from the air outlets. According to the technical scheme, the safetyprotection function of a pressure system is achieved, safety accidents caused by overpressure of the system are prevented, and the effects of being safe and reliable are achieved.

The invention discloses a battery pack and a vehicle with same. The battery pack comprises a battery pack body and a waterproof ventilation valve, wherein a vent hole is formed in the battery pack body; the waterproof ventilation valve comprises a base and a waterproof ventilation membrane; a breath hole communicated with the vent hole is formed in the base; the waterproof ventilation membrane isfixed on the outer surface of the battery pack body and is used for covering the base; the waterproof ventilation membrane is structured in manner that a damage notch communicated with the breath holeis formed in the waterproof ventilation membrane when the pressure inside the battery pack body is greater than that outside the battery pack body. According to the battery pack disclosed by the embodiment of the invention, the pressure difference inside and outside the battery pack can be balanced under normal situations, when air inside the battery pack body is expanded, or a great deal of airis released from the battery pack body, the air inside the battery pack can flow outside the battery pack body rapidly, then the purpose of rapid pressure release can be achieved, and the function ofsecurity protection on the battery pack can be achieved.

The invention discloses a light guide arm used for a laser shock wave technology. The light guide arm comprises a base used for receiving lasers, a base connecting pipe used for transmitting a light path, a first joint arm used for laser transmission, a second joint arm used for the laser transmission, a third joint arm used for the laser transmission and a fourth joint arm used for the laser transmission; the base connecting pipe is fixedly connected with the base, and is fixedly connected with a longitudinal telescopic pipe; the first joint arm is connected with the longitudinal telescopic pipe, and is connected with a transverse telescopic pipe; the second joint arm is connected with the transverse telescopic pipe, and is fixedly connected with a first light guide pipe; the third joint arm is fixedly connected with the first light guide pipe, and is fixedly connected with a second light guide pipe; the four joint arm is fixedly connected with the second light guide pipe, and is fixedly connected with a light emerging pipe. The adjustment on the light path in any position point of a space and at any light beam angle is achieved, heat dissipation of glass is achieved, a card plug-in type glass base makes the glass more conveniently installed and dismounted, transmission of high-power shock waves in any position point of a space and any light beam angle is achieved, and the requirement of shock reinforcing engineering is met.

The invention discloses an Internet-of-Things floor spring capable of automatically controlling opening and closing of a door. The Internet-of-Things floor spring comprises a shell, a motor, a batteryand a circuit board are fixedly installed on the inner wall of the bottom of the shell, a first gear is fixedly installed at the end of the output shaft of the motor, a first bearing block is fixedlyinstalled on the inner wall of the bottom of the shell, a worm rod is installed in the first bearing block in a rotating mode, the two ends of the worm rod extend out of the first bearing block, a second gear is fixedly installed at one end of the worm rod and is engaged with the first gear, a worm wheel is installed in the shell in a rotating mode, the worm rod is located between the worm wheeland the motor, the worm rod is engaged with the worm wheel, and a door shaft installation position is fixedly installed at the top of the worm wheel. The Internet-of-Things floor spring is reasonablein design, good in practicability, high in automatic and intelligent degree, high in safety performance, safe and reliable in use and capable of achieving automatic opening and closing of the door; besides, detection of a fault and maintenance can are convenient, the door can also be opened and closed manually as necessary, the application range is wide, and the Internet-of-Things floor spring issuitable for application and popularization.

The invention relates to the technical field of photovoltaic power-generating inversion, in particular to a solar photovoltaic inverter. The solar photovoltaic inverter comprises an inverter device installed in a circuit board, input terminals, output terminals and safety protection switch devices, wherein the inverter device has a DC power supply input end; the DC power supply input end receivespower supply output of a DC power supply and an AC power supply used by a plurality of photovoltaic cell panels, and provides AC power adjustment for the AC power supply; the input terminals and the output terminals are electrically connected with the photovoltaic inverter respectively; each safety protection switch device comprises a plurality of protection switches which are connected in parallel, and each input terminal corresponds to one of the protection switches; and the input terminals are electrically connected with the photovoltaic inverter by means of the safety protection switch devices. The solar photovoltaic inverter has the function of AC power adjustment for the AC power supply, can prevent the occurrence of safety accidents such as electric shock, and improves the safety ofthe photovoltaic inverter.

The invention discloses a terminal cash box equipped with a protection structure, comprising a cash box mounting frame, a cash box, a cash box cover plate, and a protection structure. The top end of the cash box is provided with a slot. The cash box and the cash box mounting frame are in sliding connection, and the cash box and the cash box cover plate are in sliding connection. The protection structure is mounted on the cash box mounting frame, and includes an upper limiting plate, a lower limiting plate, a square clamping pin, and a limiting pin. The upper limiting plate and the lower limiting plate are provided with square holes in positions corresponding to each other up and down. The square clamping pin sequentially passes through the square hole of the upper limiting plate and the square hole of the lower limiting plate. The front side of the bottom end of the square clamping pin is provided with a chamfer, and the lower end of the square clamping pin is on the moving trajectory of the cash box. In the process in which the cash box slides into the cash box mounting frame, the square clamping pin can be jacked up and fall into the slot. In the process in which the cash box cover plate slides in and covers the cash box, the square clamping pin is ejected out of the slot. By adopting the structure, the safety of the cash box in the process of loading can be well guaranteed.

The invention provides a steel pile positioning trolley. The trolley comprises a trolley handrail escalator (1), a trolley body and a steel pile clamp (11) which are connected with the trolley handrail escalator (1), a trolley and auxiliary pile hoop (10), a backing pile brace (16), a steel pile (17) and a flexible cable frame (25) which are connected with the trolley body, a sling rope tray (12), a sling hoop (13) and a boosting oil cylinder (27) which are connected with the steel pile (17), a sling hoop guide frame (14) connected with the sling hoop (13), a lifting hydraulic oil cylinder base (21) and a lifting rope and sling rope (18) which are connected with the boosting oil cylinder (27), and a steel pile lifting pulley (22) connected with the lifting rope and sling rope (18). The trolley body comprises a trolley body first layer platform (2), a trolley body second layer platform (3) and a trolley body third layer platform (4). According to the steel pile positioning trolley, a system is precisely controlled, operation is stable, and the service life is long.

The invention provides a zipper accessory comprising an upper connector and a lower connector, wherein the upper connector comprises two buttons and two cylinders which are respectively connected with two buttons; the lower connector comprises an adapter ring, an elastic opening and closing device and a hanger, wherein the adapter ring is connected to the upper connector, the elastic opening and closing device is connected with the adapter ring, and the hanger is connected with the elastic opening and closing device. When the zipper accessory of the invention is applied to trousers, the zipper accessory has the mandatory function to avoid embarrassment; when being applied to mobilephone bags, wallets, satchels, luggage and field camping tents, the zipper accessory can realize the function of safety precaution; when being applied to satchels and luggage, the zipper accessory can serve as the ornament to improve the aesthetic degree of the product. In addition, because of the detachability of the zipper accessory, the zipper accessory can perform general effect so as to improve applicability of the invention.

The invention discloses an anti-extrusion device. The anti-extrusion device comprises a movable mechanism, fixed mechanisms and a position signal detection mechanism, wherein the movable mechanism comprises a collision rod and movable frames; the two ends of the collision rod are connected with the movable frames respectively; a plurality of elastic elements are arranged between the movable framesand the inner walls of the fixed mechanisms and surround the movable frames; rod sections at the two ends of the collision rod are hinged to the fixed mechanisms respectively; the rod sections can rotate around a public sphere center relative to the corresponding fixed mechanisms, so that the collision rod can respond to extrusion thrust exerted on an operator and freely rotate; after the extrusion thrust disappears, the collision rod is automatically recovered to an initial state under the action of the elastic elements; and the position signal detection mechanism is mounted to detect and transmit a movable position signal of the collision rod, so that a control unit can perform control operation based on the movable position signal. The invention further discloses a high-altitude operation machine. The anti-extrusion device can be triggered in all directions, has an automatic resetting function, and is low in cost and high in reliability.

The invention discloses a CPS (Control and Protective Switching Device) based control system for an air conditioner. The system comprises a CPS, wherein a first normally-opened auxiliary contact of the CPS is connected in series with a coil control terminal of an intermediate relay KA2, and a first normally-closed auxiliary contact K1.1 of the CPS is connected in series with a green indicator light HG; a second normally-opened auxiliary contact of the CPS is connected to an opening control terminal of an electric regulating air valve YM1, and a second normally-closed auxiliary contact of the CPS is connected to a closing control terminal of the electric regulating air valve YM1; a third normally-opened auxiliary contact of the CPS is connected to the opening control terminal of an electric regulating water valve YM2, and the third normally-closed auxiliary contact of the CPS is connected to the closing control terminal of the electric regulating water valve YM2; a fault signal normally-opened contact of the CPS is connected in series with the coil control terminal of an intermediate relay KA3; a main body short circuit signal normally-opened contact of the CPS is connected in series with a blue indicator light HB. According to the system, the electric regulating air valve and the electric regulating water valve are controlled through the CPS control and a protecting switch; the advantages of the CPS control and the protection switch are utilized to realize the safety protection and alarming functions.