988 results about "Magnetic switch" patented technology

A rodeo event timing system having a neck collar adapted to extend around a neck of a calf, a first cable having one end affixed adjacent one end of the neck collar, a second cable having one end affixed adjacent another end of the neck collar, and a switch assembly secured to opposite ends of the first cable and the second cable. The switch assembly is adapted to separate when the ends of the neck collar separate so as to produce a start timing signal. The switch is a magnetic switch having a ball-and-socket configuration.

The invention discloses an intelligent alarm system and method for a distribution box, and relates to the technical field of intelligent alarm. The magnetic field intensity value of a distribution box door magnetic switch is monitored in real time to judge whether a distribution box door is in an open state; if so, collecting a vibration signal of the distribution box to judge whether the vibration of the distribution box is abnormal; recording the opening timestamp of the door of the distribution box, and judging the coincidence degree of the door opening time of the distribution box and the historical door opening time; jointly judging whether the door opening state of the current distribution box door is normal door opening or abnormal door opening, and if the door opening state is abnormal, sending out a first-level alarm; if normal, monitoring the door opening duration of the distribution box door and the current environmental data to judge whether a secondary alarm indicating that the hidden danger of damaging the power equipment exists is sent out; therefore, illegal door opening of the distribution box can be judged according to the change of the magnetic field state of the door magnetic switch, the vibration of the distribution box and the opening time of the distribution box door, and the false alarm rate is reduced; therefore, the fault hidden danger of the power equipment in the power distribution box cannot be further deepened.

The invention discloses a sensor clamping mechanism and a mutual inductor crimping fault detection device and method, and relates to the technical field of mutual inductor detection. In a project verification process of an existing voltage-withstanding table and an error table, abnormal conditions such as inclination of a mutual inductor body, inaccurate tray positioning, abnormity of a magnetic switch, air leakage of an air cylinder air pipe and the like occur, so that a terminal stud of a test table cannot be in contact with a secondary side terminal of a mutual inductor to be tested; and detection interruption or false detection of a corresponding mutual inductor exists, so that the verification efficiency is reduced. According to the frame body, the measuring rod, the elastic piece and the sensor, the sensor can detect the relative displacement between the measuring rod and the frame body, if the relative displacement is within a normal range, the terminal stud is in successful crimping contact, and if the relative displacement exceeds the normal displacement range, the terminal stud has a crimping fault. Therefore, the system judges that the wiring terminal of the to-be-detected mutual inductor is failed in crimping with the wiring end, automatically identifies the crimping fault of the wiring end, and improves the operation efficiency of an assembly line.

The invention relates to the technical field of power grid and transformer manufacturing, in particular to a control method and system for a permanent magnet on-load voltage regulation tap switch, and the method comprises the steps: collecting a permanent magnet switch gear signal through a switch gear signal collection module; voltage information of the low-voltage side of the transformer is acquired through a voltage signal acquisition module; logic judgment is carried out on the collected gear signals and the low-voltage side voltage signals, and permanent magnet mechanism driving current is output through a central controller; a selection driving mechanism in a tap switch is driven by a permanent magnetic mechanism to complete connection switching of transformer tapping taps; and the central controller performs double-closed-loop judgment on the gear signal and the voltage signal on the low-voltage side of the transformer, and gives a corresponding instruction according to a judgment result. The method has the beneficial effects that the state of the permanent magnet on-load tap-changer is monitored in real time through the double feedback loops, the control precision is improved, and faults are reduced; the central controller dynamically adjusts the driving current, ensures the consistency of the switching speed, adapts to different environments, and prolongs the service life.

The utility model discloses an electric overturning poly V-belt roller machine, which is mounted at a fireproof door and comprises a mounting bracket, a main conveying frame arranged on the mounting bracket, an overturning bracket and a driving component for driving the overturning bracket to overturn around the main conveying frame, a plurality of main conveying rollers are rotationally installed on the main conveying frame, a plurality of auxiliary conveying rollers are rotationally installed on the overturning support, the main conveying frame and the overturning support are rotationally connected through the adjacent auxiliary conveying rollers, and the driving assembly is an electric push rod and is provided with a magnetic switch. After the electric push rod extends, the overturning support is overturned to the horizontal position, accurate conveying of goods is guaranteed, and after the electric push rod retracts, it is guaranteed that the fireproof door is completely closed. Compared with the prior art that a rotating shaft is driven by a motor to turn over, the turnover mechanism has the advantages that the structure is simplified, the cost is reduced, the assembly steps are simplified, and the turnover stop position is more accurate.

The invention relates to a power grid power supply distribution box capable of locking intelligent power connection and a locking power connection method thereof, and the power grid power supply distribution box comprises a driving part which is installed on a second box door, is provided with a gear cylinder, and is used for driving the gear cylinder to transversely move and intermittently rotate; and the lifting piece is arranged on the second box door through a guide block and is connected with the gear cylinder. According to the invention, when the second box door is opened, the door magnetic switch can automatically disconnect the circuit to trigger the conduction of the opening loop, and this operation enables the circuit breaker to trip to cut off the power supply in the distribution box; through the mode, all branch switches in the distribution box can be switched off step by step according to a certain sequence under the action of the step-by-step locking structure, so that safe power failure can be realized during power connection; by means of the step-by-step power-off operation design, large-scale power cut-off can be effectively avoided, and equipment damage caused by current impact or voltage fluctuation is reduced.

A method, apparatus and device for controlling a vehicle heating system, and a vehicle and a storage medium. The method comprises: acquiring, in real time, an ambient temperature, passenger-compartment data, pre-valve pressure of a first electronic expansion valve (33) and suction pressure of a second electronic expansion valve (36); starting a heat pump (31), an internal heat exchanger (32), an external heat exchanger (34) and an electromagnetic switch (35), opening the first electronic expansion valve (33) according to a first initial opening degree, and opening the second electronic expansion valve (36) according to a second initial opening degree; performing automatic control on the first electronic expansion valve (33) on the basis of the pre-valve pressure and preset target pre-valve pressure, such that the opening degree of the first electronic expansion valve (33) automatically changes, according to a first preset correspondence, as the pre-valve pressure changes; and performing automatic control on the second electronic expansion valve (36) on the basis of the suction pressure and preset target suction pressure, such that the opening degree of the second electronic expansion valve (36) automatically changes, according to a second preset correspondence, as the suction pressure changes. Therefore, the vehicle costs of a vehicle can be reduced.

The invention relates to the technical field of beacon lights, in particular to a beacon light capable of being installed through an unmanned aerial vehicle and the unmanned aerial vehicle. The beacon light comprises a beacon light body, a power module is fixed in the beacon light body, and a mounting groove is formed in the lower end of the beacon light body; a mounting groove is formed in the lower end of the beacon light body, a plurality of electromagnetic bolts which are distributed along the mounting groove in an annular array mode are arranged in the lower end of the beacon light body, a conical top base is fixed to the upper end of the beacon light body, and a magnetic switch is fixed in the conical top base and connected to a circuit between the power module and the electromagnetic bolts in series. The beneficial effects are that the unmanned aerial vehicle is utilized to realize automatic replacement of the beacon light device, an operator can perform remote operation without arriving at a site, the efficiency is high, manpower and material resources are saved, the operation safety is high, and the unmanned aerial vehicle has very high use value and popularization significance.

The utility model belongs to the technical field of electromagnetic switches, and particularly relates to an electromagnetic switch with an indicating lamp, which comprises a bottom shell, a top cover, a closing button, an opening button, the bottom shell and a contact pin seat assembled by a buckle, a first contact pin and a second contact pin are assembled on the contact pin seat, and an electromagnetic coil is assembled on one side of an inner cavity of the bottom shell through a mounting frame. A moving seat is assembled on the contact pin seat in a sliding mode, a movable contact plate is arranged on the moving seat through a first spring, the warped plate drives the moving seat to move up and down in a reciprocating mode when swinging, connection and disconnection of the first contact pin and the second contact pin are achieved, a second spring is connected between the moving seat and the top cover, and a sleeve seat is arranged on the top cover. The second lead is propped against the second contact pin through a third spring in the sleeve seat; according to the utility model, the contact pin seat and the bottom shell are assembled in a buckling manner, so that quick disassembly and reassembly during maintenance are facilitated, the electromagnetic switch does not need to be integrally disassembled, the maintenance time and cost are greatly saved, the electrical connection is more reliable, and the stability and durability of the whole structure are improved.

The invention relates to a contact resistance and state detection method for an electromagnetic switch device of a railway vehicle, and the method comprises the steps: injecting an AC signal into a to-be-detected contact of the electromagnetic switch device, and then collecting an AC voltage signal of the to-be-detected contact; calculating a first resistance value of the contact to be measured according to the acquired alternating current signal and the alternating voltage signal; and further comparing the resistance value obtained by detecting the contact to be detected with a pre-configured resistance scale value, and judging whether the contact to be detected is in a good state or not according to a comparison result. On-line detection of the contact resistance of the electromagnetic switch device can be realized, and on the basis, judgment of the electricity storage state can be realized, so that the working safety and reliability of equipment are improved.

A magnetic switch can be configured to have or provide a variable, user-selectable radial flux pattern. In an example, the switch comprises a magnetized outer structure and a magnetized inner structure provided at least partially inside of the magnetized outer structure. In an example, at least one of the magnetized inner and outer structures is rotatable relative to the other one of the magnetized inner and outer structures about an axis of rotation that is common to the magnetized outer structure and magnetized inner structure. The radial flux pattern can extend away from the common axis of rotation and can vary in strength according to a relative position of the magnetized inner and outer structures. In other examples, the switch can comprise multiple layers of magnetized structures.

The invention discloses a large hydro-generator full-condition field loss protection method and system, and relates to the technical field of power system relay protection, and the method comprises the steps: collecting the generator end voltage and the generator end current of a hydro-generator, collecting the bus voltage, and calculating the reactive power of the hydro-generator according to the generator end voltage and the generator end current; acquiring the node position of the field suppression switch, and judging whether the node position of the field suppression switch is abnormal or not based on the jump position of the field suppression switch, the generator terminal voltage and the reactive power of the hydro-generator; calculating a generator end current sudden increment of the hydro-generator according to the acquisition step length, and judging whether the hydro-generator has an excitation loss fault or not according to a fixed logic based on the reactive power of the hydro-generator, the generator end current sudden increment and a field suppression switch jump position with the assistance of a negative sequence voltage, a generator end voltage and a bus voltage; and if the field loss fault has occurred, executing a corresponding field loss protection action. According to the method, the phenomenon that impedance criteria are used for protecting inaction under light-load and no-load working conditions can be avoided, and the possibility of protection misoperation is reduced.

The utility model discloses an electromagnetic switch with a shockproof function for an automobile starter, and relates to the technical field of electromagnetic switches. The electromagnetic switch with the shockproof function for the automobile starter comprises a mounting table arranged on a starting motor and an electromagnetic switch main body movably clamped on the mounting table, a loading seat is arranged at the bottom of the electromagnetic switch main body, the loading seat is clamped with the mounting table, and a shockproof reinforcing mechanism is arranged between the mounting table and the electromagnetic switch main body. According to the electromagnetic switch with the shockproof function for the automobile starter, the electromagnetic switch main body is primarily fixed by bolts of the mounting table and the loading seat and is secondarily shockproof and reinforced by the shockproof reinforcing mechanism, so that when the position of the electromagnetic switch main body is fixed, the whole electromagnetic switch main body and the starting motor are stably fixed; and through the dual-fixation effect, it is ensured that the anti-vibration effect is good and the stability is high after the electromagnetic switch body is installed.

According to the megawatt-level half-cycle power generator based on the magnetic pulse compression system, by designing the constant-current magnetic switch reset circuit and the PID voltage stabilization charging technology, the pulse jitter characteristic within 10 ns can be achieved on the premise that megawatt-level power is output, the control precision is greatly improved, and stable output of high-power pulses is achieved. The problem that pulse generated by a traditional magnetic pulse compression amplifier is large in delay jitter is solved, high-precision output of megawatt-level pulses can be achieved, the high-precision magnetic pulse compression amplifier can be applied to a high-power transmitter needing to accurately control pulse output time, the high switching frequency and high switching efficiency of an MOS tube and the pulse compression characteristic of a magnetic switch are combined, and the high-precision magnetic pulse compression amplifier is achieved. The magnetic pulse power source has the advantages of high output power and high efficiency, improves the amplitude and phase stability of the output pulse compared with the traditional magnetic pulse power source, and expands the application scene and platform.

The application discloses a kind of excitation control circuit with multiple de-excitation loop for aviation three-stage power generation system, including: resonant de-excitation capacitor C2, de-excitation switch S1, de-excitation switch S2, anti-reverse diode D1, freewheeling diode D2, freewheeling diode D3, transient voltage suppression diode D4, voltage regulating MOS tube Q1, voltage regulating MOS tube Q2, de-excitation resistor R1 and excitation winding L;Wherein, the positive terminal of DC power supply DC+ is connected to the anode of anti-reverse diode D1, the cathode of anti-reverse diode D1 is sequentially connected to the negative terminal of DC power supply DC- by de-excitation switch S1 and resonant de-excitation capacitor C2;The cathode of anti-reverse diode D1 is respectively connected to the drain of voltage regulating MOS tube Q1, the negative electrode of freewheeling diode D3 and one end of de-excitation switch S2, the source of voltage regulating MOS tube Q1 is respectively connected to the positive electrode F+ of excitation winding L, the negative electrode of freewheeling diode D2;The anode of freewheeling diode D3 is respectively connected to the negative electrode F- of excitation winding L, the drain of voltage regulating MOS tube Q2 and the negative electrode of transient voltage suppression diode D4, the other end of de-excitation switch S2 is respectively connected to the positive electrode of transient voltage suppression diode D4 and one end of de-excitation resistor R1;The anode of freewheeling diode D2, the source of voltage regulating MOS tube Q2 and the other end of de-excitation resistor R1 are respectively connected to the negative terminal of DC power supply DC-.The technical scheme of the application solves the problem that the freewheeling diode added between excitation voltages in the existing excitation circuit cannot consume the energy of magnetic field, and the de-excitation speed is slow.

The invention provides a high-performance integrated electric actuator, and belongs to the technical field of automatic control. The motor drives the ball screw assembly to rotate through the transmission mechanism. The ball screw assembly is fixedly connected with the piston rod; the piston and the piston rod are assembled and then arranged in the main body cylinder barrel to do linear reciprocating motion; a self-lubricating structure is arranged on the inner wall of the main body cylinder barrel; a piston rod is rigidly connected with a nut of the ball screw assembly, a rod body penetrates through a guide sleeve at the front end of the body, and the front end of the piston rod is connected with a transmission load through a socket. A guide sleeve made of a thermal compensation material is arranged at the guide part of the piston rod; the magnetic switch is fixed outside the main body through a mounting groove or a screw and is aligned with the magnetic ring on the piston rod; the magnetic ring is embedded into the piston rod; and the anti-vibration supporting ring and the wear-resistant ring are arranged at the supporting part of the ball screw assembly. Stepless and multi-point positioning in a range can be realized according to working requirements, and multi-point free positioning is ensured.

The present invention relates to a solar light comprising a base body and an attachment element that can be placed on or inserted into the base body, wherein the attachment element comprises a light source and is movable relative to the base body. According to the invention, the attachment element comprises a magnetic switch, and the magnetic switch can be actuated by a magnet arranged on the base body by rotating the attachment element relative to the base body about a first axis, thereby moving the light source from an off position to an on position.

The invention discloses a tobacco equipment belt deviation warning device, including: a belt deviation detection device and an alarm device; the belt deviation detection device includes: a rotating base is a T-shaped structure, a magnetic switch is installed at one end of the horizontal side of the rotating base, and a spring push rod is installed at the other end of the horizontal side of the rotating base; the middle part of the support rod is fixed at the intersection of the horizontal side and the vertical side of the rotating base; the upper part of the support rod is fixedly connected to the top fixing block, and the top fixing block is fixed to one side of the protective cover of the equipment belt; the alarm device includes: after the PLC control system receives the signal from the belt deviation detection device, the control output terminal of the PLC control system outputs a 24V high level, controls the intermediate relay to be attracted, and realizes the power supply of the alarm indicator light. The technical content disclosed by the invention is that the belt deviation detection device and the alarm device are used in combination, and the belt can complete the deviation detection without implanting a metal segment, thereby reducing the belt production cost.

The invention relates to a magnetic control fast switch and dynamic voltage restorer combined power supply switching system and method. The system comprises a magnetic control switch unit, a voltage monitoring unit, a voltage compensation unit and an arc extinguishing unit. The magnetic switch unit is made of a novel magnetic control material and forms a vertical motion opening and closing mechanism through excitation and demagnetization of a built-in coil and assistance of a spring, and the vertical motion opening and closing mechanism is used for changing an internal magnetic domain and rapidly opening and closing. The voltage detection unit adopts a double-second-order generalized integral phase-locked loop voltage monitoring structure and is used for detecting instantaneous phase and frequency information of power grid voltage; the voltage compensation unit adopts a dynamic voltage restorer and is used for performing voltage compensation according to a difference value between a current power supply and an objective table power supply in a power supply switching gap so as to effectively maintain the stability of load voltage when voltage sag occurs in a power grid; and the arc extinguishing unit adopts a T-shaped double-outlet vacuum arc extinguishing chamber and is used for realizing zero arc in the whole power supply switching process. According to the invention, rapid switching of the power supply can be realized, and continuous voltage is ensured in the switching process.

An electromagnetic-actuator (EA) including a coil-element (CE) having a coil-core (CC) / coil arranged about the CC-circumference. The CC has a symmetrical first-region (FR) having an axis-of-symmetry (AOS), the CC being surrounded by the coil, and a movable-magnetic-armature-body (MM AB) as a movable-actuator-element (MAE) interacts with the CE to produce an AB activation-movement, and is supported in the actuator by a bearing-device (BD) and movable from a first / second-position by activating the CE. The BD is radially-offset to the CC AOS, and the AB extends from the BD radially over the CC from a first / second-side of the CC, which has a second-region (SR) extending radially beyond the FR and is on second-side (SS) of the CC between the coil / AB in the direction of AOS such that an air-gap between CC / AB in direction of the AOS is smaller on the SS of the CC than on first-side when the AB is in first-position.

The utility model relates to an airtight electromagnetic switch for a starter, which comprises a shell assembly, a movable iron core assembly, a static iron core, a push rod assembly and a sealing bush, and is characterized in that the movable iron core assembly and the static iron core are coaxially arranged in an inner cavity of the shell assembly; the push rod assembly penetrates through a center cavity of the static iron core, one end of the push rod assembly is fixedly connected with the movable iron core assembly, the sealing bush is located at the end, close to the static iron core, of the push rod assembly, and the sealing bush is arranged in a gap between the push rod assembly and the static iron core and used for sealing. According to the utility model, the technical problem that the service life of an existing electromagnetic switch is short due to the lack of a good sealing effect is solved.

The utility model relates to the technical field of injection molding machines, in particular to a safety door lock for an injection molding machine, which comprises a control unit and a locking unit, the control unit comprises an electromagnetic switch, a control magnet and a control part, the electromagnetic switch is fixedly connected with the injection molding machine rack, the tail end of the control magnet is rotationally connected with the safety door body, the tail end of the control part is fixedly connected with the head end of the control magnet, and the control part is used for driving the control magnet to rotate, so that the control magnet is close to or away from the electromagnetic switch; the locking unit comprises a locking piece and a lock catch, the locking piece is fixedly connected with the lock catch, the lock catch is fixedly connected with the safety door, the locking piece is electrically connected with the electromagnetic switch, the electromagnetic switch is used for controlling the locking piece to fasten or loosen the lock catch, and through the design of the control unit, the safety door is prevented from being opened due to mistaken touch; and through the design of the locking unit, the safety door cannot be closed due to accidental reasons after being opened, so that the safety of maintenance personnel entering the injection molding machine is ensured.

In a first aspect, embodiments described herein relate to a diving robot system for inspecting and / or scrubbing an object (e.g., a warship) in a marine environment. In some embodiments, the robotic system includes: a housing; a plurality of adhesive engines disposed within the housing; a plurality of adhesive engines disposed within the housing; a lighting device; and an image forming apparatus. In some applications, each adhesion engine comprises: a plurality of adhesion devices constructed and arranged to secure the system to the object; a magnetic switch motor for turning on and off the adhesion device; at least one scrubbing element; and a body rotation motor for moving the scrubbing element across a surface of the object.

The utility model discloses a two-dimensional code box strip association sequence error prevention device, which belongs to the technical field of cigarette equipment manufacturing, and comprises a small box sequence code reader, a small box strip association sequence code reader, a small box strip association sequence code reader, a small box strip association sequence code reader, a small box strip association sequence code reader, a small box strip association sequence code reader and a small box strip association sequence code reader, the small box detecting and removing mechanism is connected with the packaging machine PLC through a signal line, and the packaging machine PLC controls the small box detecting and removing mechanism to execute corresponding removing operation; the small box cigarette supplement code reader is connected with the two-dimensional code association system, and the small box cigarette supplement code reader is triggered by an electromagnetic switch; the electromagnetic switch is connected with the small-box cigarette supplement device and outputs a signal line to the control end of the small-box cigarette supplement code reader; and the two-dimensional code association system is connected with the packing machine PLC through a network connection device, and is directly connected with the small box sequence code reader and the small box cigarette supplement code reader at the same time. According to the utility model, code reading information can be prevented from being covered, and normal association of the two-dimensional code of the box strip is ensured.

The present invention belongs to the field of measurement and testing technology, and specifically discloses an offset voltage adjustment method, a magnetic switch, and a magnetic switch automatic adjustment system and method. The adjustment method symmetrically connects a first resistor string and a second resistor string, a first switch string and a second switch string with the same structure in series at both ends of the adjustment object, and the two corresponding adjustment switches in the first switch string and the second switch string maintain opposite closed / open states, thereby ensuring that the total resistance value of the first resistor string and the second resistor string is constant; traverses all closed / open states of the second switch string to change the value of the adjustment voltage, and the closed / open state of the first switch string changes accordingly; compares the magnitude of the adjustment voltage and the offset voltage to determine the final adjustment result. The present invention solves the problem that the packaged magnetic switch cannot be adjusted, and no instrument is required for adjustment, and only the inherent comparator in the magnetic switch is used, and the method is simple.

The utility model relates to the technical field of water quality detection, in particular to an underground water fixed-depth sampling device which is internally provided with a sampling assembly, a magnetic switch assembly and a magnetic control assembly, the magnetic switch assembly is installed at the collecting end of the sampling assembly, and the magnetic control assembly is electrically connected with the magnetic switch assembly; the sampling assembly is used for collecting an underground water sample, the magnetic switch assembly is used for opening or closing the collecting end of the sampling assembly through the magnetic change of the magnetic switch assembly, and the magnetic control assembly is used for controlling the magnetic change of the magnetic switch assembly so as to keep the closed state of the collecting end of the collecting assembly before the collecting assembly reaches a specified depth; thus, closing and opening of the collecting end of the collecting assembly are controlled through the magnetic switch assembly, so that underground water at other depths is prevented from entering the collecting assembly, only underground water at a specified depth enters the collecting assembly, external heavy auxiliary equipment is not needed, and the device is convenient to move during multi-position sampling, so that the transportation cost and the labor cost are reduced.

The utility model discloses an automatic fire extinguishing device for an expressway tunnel rescue robot, which comprises an industrial robot, a fire extinguisher and an upper computer, the fire extinguisher is fixed at the lower part of a support frame, and a quick change device is connected between the upper surface of the support frame and the tail end of the industrial robot; the quick-change device comprises a quick-change main disc and a quick-change tool disc; the quick-change main disc is fixed at the tail end of the industrial robot through a connecting flange; the quick-change tool disc is fixed on the supporting plate, and the quick-change main disc and the quick-change tool disc are connected or disconnected through a piston type steel ball locking structure; an actuating mechanism cylinder is mounted below the supporting plate and is provided with a push rod, a cylinder air inlet / outlet and a magnetic switch sensor for sensing actuating signals of the actuating mechanism cylinder; the push rod is connected with a pressing handle at the top of the fire extinguisher, and the upper computer controls the opening and closing start-stop state of the actuating mechanism air cylinder according to actuating signals, obtained by the magnetic switch sensor, of the actuating mechanism air cylinder.

An electrically driven fastener structure includes a body, a fastening unit and a wire. The body has a first assembly portion. The fastening unit has a second assembly portion corresponding to the first assembly portion. The wire is adapted to pass a current and to pass through the first assembly portion or the second portion to form a magnetic switch using the first assembly portion or the second assembly portion, so as to drive the magnetic switch based on on or off or strong or weak of the current, or to drive the magnetic switch based on on or off or strong or weak of a magnetic force.

According to the printing ink viscosity detection equipment provided by the utility model, in the working process of the printing ink viscosity detection equipment, a large amount of to-be-tested printing ink is contained in the test box and the printing ink box. The driving air cylinder drives the driving piston to be inserted into the testing box through the driving shaft, part of to-be-tested printing ink in the testing box is injected into the printing ink box through the output port, the output pipe and the injection port, and meanwhile part of the to-be-tested printing ink in the printing ink box flows back into the testing box through the outflow port, the backflow pipe and the backflow port. The detection end of the magnetic switch is used for detecting the reciprocating motion frequency of the driving shaft on the driving air cylinder. It needs to be explained that a function relationship exists between the reciprocating motion frequency of the driving shaft and the viscosity value of the ink; and the control mechanism calculates the obtained reciprocating motion frequency of the driving shaft or compares the obtained reciprocating motion frequency with information in a database to obtain a corresponding ink viscosity value, and the ink viscosity value is displayed through a display. The ink viscosity detection equipment is simple and exquisite in structure and low in cost.

The application relates to a power grid power supply distribution box with a closed intelligent power connection and a closed power connection method thereof, which comprises a driving part installed on a second box door, a gear cylinder arranged on the driving part, and a lifting part installed on the second box door through a guide block and connected with the gear cylinder. When the second box door is opened, a door magnetic switch automatically disconnects a circuit, thereby triggering the conduction of a tripping circuit, which makes a circuit breaker trip and cut off the power supply in the distribution box. In this way, all branch switches in the distribution box are disconnected in a certain order under the action of a step-by-step locking structure, so that safe power-off can be realized when the power is connected. The step-by-step power-off operation design can effectively avoid large-scale power cut-off and reduce the damage of equipment caused by current impact or voltage fluctuation.