1007 results about "Electromagnetic drive" patented technology

The invention provides a multi-angle cutting laser pipe cutting machine, and belongs to the technical field of laser cutting equipment, the multi-angle cutting laser pipe cutting machine comprises a machining module, a feeding module is arranged at one end of the machining module, a discharging module is arranged at the other end of the machining module, and the multi-angle cutting laser pipe cutting machine further comprises a cutting assembly connected with the machining module and used for cutting pipes; the device has the advantages that flexible adjustment of the position of the focus lens is achieved through cooperation of air cylinder driving and telescopic spring buffering, focus requirements of pipes with different thicknesses are met, flexible connection of a cooling channel is achieved through the telescopic pipe, continuous and stable heat dissipation of the focus lens is guaranteed, and the service life of the lens is prolonged; the electromagnetically-driven rotating cylinder drives the turbine blades to rotate to form negative-pressure airflow, an air curtain is formed at the cutting end, metal residues and dust are prevented from being diffused to the focus lens and the lens cone, a physical isolation barrier is formed through the protection sleeve, impurities are prevented from being attached to equipment parts or blocking a pipeline, long-term stable operation of equipment is guaranteed, and diffusion of the equipment to the working environment is reduced.

The invention discloses a numerical control machine tool vibration suppression self-adaptive control system and method, and relates to the technical field of intelligent vibration control, and the method comprises the steps: building a current-modal dynamic mapping relation between an electrical drive characteristic and a mechanical structure modal response based on a vibration state feature vector; real-time machine tool modal state vectors are obtained through online recursive estimation; the machine tool modal state vector is used as a boundary condition to be injected into the virtual prediction model; solving to obtain an optimal control parameter sequence and a corresponding vibration prediction result in a future time domain by taking multi-performance index collaborative optimization as a target through a rolling optimization control strategy; translating the control parameter sequence into a specific execution instruction and issuing the specific execution instruction; monitoring an execution process in real time and recording actual response data; according to the method, the accuracy of vibration prediction and the real-time performance of control response are improved by establishing the dynamic mapping relation from the electromagnetic driving characteristics of the servo main shaft and the feed motor to the dynamic response of the machine tool structure.

The invention discloses a stainless steel workpiece polishing device which comprises an equipment box body, wherein a polishing solution box is arranged on one side of the equipment box body; the rotating disc is rotationally arranged at the top of the equipment box body, a plurality of hollow shafts with negative pressure environments inside are rotationally arranged in the middle of the rotating disc, first vacuum suction cups used for fixing workpieces are installed at the tops of the hollow shafts, and sealing pistons used for cutting off negative pressure of the hollow shafts are arranged in the hollow shafts. An electromagnetic driving part for driving the sealing piston is arranged below the sealing piston; through cooperative work of a piston cylinder and a filter box and lifting cooperation of a lifting plate, a lifting piston and the piston cylinder, dust collection, filtering and spraying of a polishing solution can be achieved while the lifting plate is stably guided, dust and waste gas generated in the polishing process can be effectively collected, environmental pollution is reduced, and the polishing effect is improved. And the polishing liquid can be automatically pressurized and sprayed, so that cyclic utilization of air is realized, and the energy consumption is reduced.

The invention relates to an SPnT surface-mounted microwave mechanical switch, and relates to the technical field of microwave switches, the microwave mechanical switch comprises a metal substrate, a plurality of micro coaxial transmission lines are arranged in the metal substrate, the length direction of the micro coaxial transmission lines is arranged along the thickness direction of the metal substrate, and the two ends of the micro coaxial transmission lines penetrate through the metal substrate; the radio frequency communication mechanism comprises a plurality of radio frequency reeds, one radio frequency reed is correspondingly arranged between every two adjacent micro coaxial transmission lines, the radio frequency reeds and the metal substrate are arranged in parallel at intervals, and linkage pieces are arranged on the radio frequency reeds; the electromagnetic driving mechanisms and the radio frequency reeds are arranged in a one-to-one correspondence mode, the electromagnetic driving mechanisms are connected with the corresponding linkage pieces, and the electromagnetic driving mechanisms are used for driving the radio frequency reeds to be in lap joint with the two corresponding micro-coaxial transmission lines. The microwave mechanical switch provided by the invention can be suitable for application scenes with relatively high requirements on high-frequency performance.

The invention provides an electromagnetic driving device and a robot system, and relates to the technical field of medical surgery, and the electromagnetic driving device comprises an electromagnetic driving unit and a control unit. The electromagnetic driving unit serves as an execution unit and comprises a positioning frame, an adjusting assembly connected with the positioning frame and an electromagnetic coil assembly connected with the positioning frame and the adjusting assembly. The control unit comprises a master controller and a coil angle controller electrically connected with the master controller. On the basis, the coil angle controller is electrically connected with the adjusting assembly and used for adjusting the angle between the electromagnetic coil assembly and the positioning frame through the adjusting assembly so as to adjust the magnetic field direction of the electromagnetic coil assembly and drive the magnetic micro-robot to move, and therefore the magnetic micro-robot is driven to move in the human body to complete different medical functions.

The invention relates to a piezoelectric and electromagnetic composite driving microminiature jumping robot structure. The two Z-shaped piezoelectric legs are symmetrically installed on the bottom face of the platform, the fan-shaped foot soles are arranged at the bottoms of the Z-shaped piezoelectric legs respectively, the electromagnetic driving device is located between the two Z-shaped piezoelectric legs, the vertical energy storage springs are located on the two sides of the electromagnetic driving device, and the direction adjusting legs are arranged at the bottom of the electromagnetic driving device. Each Z-shaped piezoelectric leg is provided with an electric ceramic piece polarized in the thickness direction. According to the invention, the Z-shaped piezoelectric legs cooperate with the attraction / repulsive force generated by the electromagnetic device through the bending deformation of the piezoelectric ceramic piece in a d31 mode to cooperatively compress the vertical energy storage spring to realize energy storage; and during release, spring energy and electromagnetic thrust are superposed to push the robot to realize high-energy-density jumping, so that the problem of low energy storage density of the miniature jumping robot is solved, and the miniature jumping robot has the characteristics of compact structure, strong obstacle crossing ability and high motion controllability.

The invention relates to the field of radio frequency mechanical switches, and discloses a radio frequency mechanical switch with a self-holding function, which comprises an output interface, a housing, a switch assembly and a signal interface assembly, and is characterized in that the output interface is arranged at the top end of the housing, the switch assembly is arranged in the housing, and the signal interface assembly is arranged at the bottom end of the switch assembly; the signal interface assembly is provided with a total signal interface and a branch signal interface, and the switch assembly comprises a mechanical motion assembly and a signal transmission assembly. Through a mechanism of combining electromagnetic driving and permanent magnet adsorption, stable maintenance of a moving iron needle state after power failure is realized, the moving iron needle is controlled through a current direction when a coil column is electrified, and after power failure, the moving iron needle is adsorbed by a first magnet due to the characteristics of an iron material, so that the switch can reliably maintain the current state without continuous power supply, and the switch is safe and reliable. And the stability and the reliability are improved.

A chess-like piece positioning and recognition system, including: an MCU, an RFID module, multi-channel analog switches, an electromagnet and communication signal switch unit, an electromagnetic drive unit, antennas, silicon steel blocks, and pieces. The MCU is used for communication with the RFID module, selecting channels of the multi-channel analog switches, and electromagnet and communication signal switch selection. The RFID module is used for reading information from the pieces. The multi-channel analog switches are used for group gating and intra-group channel gating of the RF channels. The electromagnet and communication signal switch unit is used for switching between the electromagnetic drive unit and the RF channels. The electromagnetic drive unit is used for driving an electromagnet. The antenna is used for sending and receiving signals from the pieces and also serves as the coil for the electromagnet. The silicon steel block is used as the core of the electromagnet, which generates a magnetic attraction to the pieces after being magnetized.

The present invention discloses an annular magnetic pulverization system for micro-nano crushing of wood fibers, comprising an annular pulverization cavity, a breathing device, and an emission and recovery device. The annular pulverization cavity is a closed structure, and is filled with conductive particles. A circle of electromagnetic drive devices and a circle of gravitational devices are arranged inside the annular pulverization cavity, wherein the electromagnetic drive device is located in the outer circle, and the gravitational device is located in the inner circle. The gravitational device and the electromagnetic drive device exist together. A conductive particle emission and recovery device is connected to the outside of the annular pulverization cavity. Breathing ports are provided at the top and bottom of the annular pulverization cavity, which are connected to the breathing device. Wood fiber powder moves up and down under the regularity of the breathing device, collides with the high-speed moving conductive particles in the annular cavity, and is punctured and crushed. The present invention overcomes the problems of limited diameter of existing professional supporting equipment, the inability of conductive particles to obtain initial velocity, and the problem of insufficient processing efficiency due to the lack of a breathing device.

A capacitance value fast-placing vacuum capacitor includes: a housing, a first electrode group and a second electrode group. A vacuum chamber is provided in the housing. The first electrode group and the second electrode group are mutually coupled and accommodated in the vacuum chamber. An electromagnetic drive mechanism is mounted on the outer side of one end of the housing. The electromagnetic drive mechanism is capable of driving the first electrode group to shift relative to the second electrode group, the vacuum capacitor is switched between two capacitance value states. In the capacitance value rapid-switching vacuum capacitor, the electromagnetic drive mechanism is configured for rapidly adjusting and switching capacitance values of the vacuum capacitor, the capacitance value switching time of the vacuum capacitor is within one hundred milliseconds, thus meeting the requirement of an application device of the vacuum capacitor for rapid matching of an impedance matcher.

The invention discloses a two-dimensional large-angle fast reflecting mirror device based on a sheet-shaped flexible support, a flexible support assembly comprises a flexible connecting sheet of a hollow structure and a flexible connecting rod, one side of the flexible connecting sheet is fixedly connected with a reflecting mirror assembly, and the other side of the flexible connecting sheet is fixedly connected with a base; the axial direction of the flexible connecting rod is perpendicular to the plane where the flexible connecting piece is located and penetrates through the center of the flexible connecting piece, one end of the flexible connecting rod is fixedly connected with the center of one side of the reflector assembly, and the other end of the flexible connecting rod is fixedly connected with the center of one side of the reflector assembly. The electromagnetic driving assembly penetrates through the flexible connecting piece and then is fixedly connected with the reflector assembly and the base. The sensor assembly is fixedly arranged at the central position of the base and is spaced from the reflector assembly by a first preset distance. Through the collaborative design of a flexible connecting piece-flexible connecting rod composite supporting structure and an obliquely-arranged moving magnet type electromagnetic driving assembly, the two-dimensional large-angle deflection capacity of the magnitude of + / -10 degrees is achieved.

The invention provides a magnetic suspension underwater robot path following control method, a magnetic suspension underwater robot path following control device, magnetic suspension underwater robot path following control equipment and a medium, and relates to the field of underwater robot path following control. The motion control bottleneck of a traditional underwater robot in a complex environment is broken through. In the aspect of dynamic modeling, interaction between magnetic force and fluid resistance is considered, and underwater motion characteristics of the robot are accurately described. A nonlinear control strategy combining the Lyapunov stability theory and sliding mode control is adopted, and a trajectory tracking controller with high robustness is designed to ensure that the robot can stably and efficiently operate along a predetermined trajectory in a complex underwater environment. The maneuverability and the operation precision of the underwater robot are remarkably improved, a more reliable solution is provided for the fields of ocean exploration, resource development, environment monitoring and the like, and huge application potential and market value are shown.

The invention discloses a permanent magnet and soft magnet mixed heterogeneous magnetic pole array which is formed by splicing a plurality of magnetic pole configuration units with closed magnetic circuits in a circular ring shape. Each magnetic pole configuration unit comprises two first permanent magnets with right triangle-shaped cross sections, two second permanent magnets with trapezoidal cross sections and a composite soft magnet with an isosceles triangle-shaped cross section; the vertex angle of the first permanent magnet points to the air gap; the vertex angle of the composite soft magnet deviates from the air gap; the second permanent magnet is provided with a first inclined side surface spliced with the waist side surface of the first permanent magnet and a second inclined side surface spliced with the waist side surface of the composite soft magnet; in the same magnetic pole configuration unit, the magnetizing directions of the first permanent magnet and the second permanent magnet on the two symmetrical sides enable magnetic field lines to be gradually gathered towards the side, close to an air gap, of the composite soft magnet. The invention also discloses an electromagnetic drive using the heterogeneous magnetic pole array. By adopting the magnetic pole array, the magnetic field intensity and the magnetic shielding characteristic can be simultaneously improved, the eddy current loss of the magnetic pole array can be reduced, and the permanent magnet consumption is reduced.

The invention provides an electromagnetic driving system. In one embodiment, the electromagnetic drive system comprises: a) one or more magnetic robots located within a workspace; b) three independent mechanical arms, wherein each independent mechanical arm comprises a movable electromagnetic coil; c) a positioning system for tracking the one or more magnetic robots; the three independent mechanical arms are controlled through multi-objective optimization to ensure a coil configuration space capable of providing a magnetic field for manipulating the one or more magnetic robots in the working space.

The invention discloses a soft reset type electric piano counterweight keyboard, and relates to the technical field of piano equipment. A key assembly is arranged at the top of the piano shell; a hinge frame is fixedly installed at the bottom in the piano shell through bolts, soft and feedback playing hand feeling is achieved through precise mechanical linkage, meanwhile, the position of an inductance piece is changed by sliding and extruding a clamping bead through a balance weight, and high-precision and high-reliability pressing force detection is achieved in combination with optical sensing auxiliary monitoring. The force signal is converted into keyboard'post-touch layer 'control, and a single-key or global tenuto mode is intelligently distributed; in addition, the key contact state is accurately captured through photoelectric induction, space capture is carried out on hand actions in combination with an infrared camera and a sensing radar, and real-time tactile feedback is provided through electromagnetic driving.

The invention provides a silk fabric take-up and pay-off device, and relates to the technical field of textile machinery. The device comprises a supporting frame, a winding disc, a magnetic rotating assembly and an electromagnetic driving assembly, the winding disc and the magnetic rotating assembly are coaxially and fixedly connected to the supporting frame through a center rotating shaft, and the electromagnetic driving assembly generates an alternating magnetic field to drive the magnetic rotating assembly to rotate. According to the scheme, non-contact electromagnetic driving is adopted to replace traditional mechanical transmission, the abrasion problem caused by physical contact is avoided, the operation stability and the start-stop response speed are improved, meanwhile, vibration noise is reduced, the maintenance process is simplified, and the device is suitable for efficient winding and unwinding operation in silk fabric production.

The invention discloses an axial-radial composite magnetic flux electromagnetic drive with a hollow stator, which is characterized in that two radial rotors and two axial rotors respectively form air gap magnetic fields in the radial direction and the axial direction of the stator; the air-gap magnetic field interacts with symmetrical current in a coil winding surrounding the mutually-embedded stator structure to generate output torque and synchronous rotating speed, so that the end winding of the motor is effectively utilized through the design of the four rotors, the air-gap area of the motor for electromechanical energy conversion can be effectively increased while the size of the system is not increased, and the efficiency of the motor is improved. The torque density of the motor is increased; meanwhile, symmetrical air-gap magnetic fields are formed at the two axial ends of the stator by the radial or axial magnetic pole array with alternately magnetized N poles and S poles, so that the radial magnetic flux and the axial magnetic flux are decoupled, the thickness of the stator yoke can be reduced, the stator yoke is even hollow, and the cost and the weight are reduced; in addition, the hollow part of the stator core also provides favorable conditions for arranging a heat dissipation flow channel in the internal space of the motor, so that the torque output capability of the motor is further improved.

A system for performing work processes on workpieces or the like. The system includes at least two first process stations for performing, in each case, a first work process on the workpiece or the like with a first process duration and at least one second process station for performing a second work process on the workpiece or the like with a second process duration, wherein the first process duration and the second process duration are of different lengths, and including a transport surface on which the workpieces or the like are movable individually on transport units by means of electromagnetic drives.

The invention relates to the technical field of driving devices, in particular to a small-angle swinging electromagnetic driving module which comprises a stator and a rotor, the rotor comprises a rotating shaft, a magnetic conductive assembly and two permanent magnets, the magnetic conductive assembly is arranged on the rotating shaft, the two permanent magnets are arranged on the magnetic conductive assembly at intervals, and the magnetic conductive assembly is provided with a first cambered surface; the stator comprises a shell, a coil and a magnetic framework, the magnetic framework and the rotating shaft are arranged in the shell, the magnetic framework is mounted on the shell, the coil is wound on the magnetic framework, the magnetic framework is provided with a second cambered surface, and the first cambered surface and the second cambered surface are concentrically arranged; two pole shoes are arranged in the shell, each pole shoe is provided with an inner arc surface, and the central angle corresponding to each inner arc surface is not larger than the swing angle of the corresponding permanent magnet. According to the invention, the magnetic conductive assembly is coupled with the magnetic conductive skeleton, the coil is utilized to generate an alternating magnetic field to control the permanent magnet to drive the rotor to swing, and the inner cambered surface angle setting of the pole shoes is utilized, so that the effect of controlling the rotation amplitude of the permanent magnet to be kept within a required range is achieved.

The invention relates to the technical field of fault prediction, and particularly discloses a fault prediction method and system for a high-voltage switch operating mechanism. According to the method, early-stage accurate prediction of the fault of the high-voltage switch operating mechanism is realized through multi-feature extraction and fusion in combination with a lightweight Transformer model, and compared with a traditional single current signal analysis method, the method fully considers the coupling effect of electromagnetic and mechanical states, captures electromagnetic abnormality through current-electromagnetic coordination node features, and improves the accuracy of the fault diagnosis of the high-voltage switch operating mechanism. According to the method, mechanical vibration faults are recognized through vibration energy features, motion discordance is detected through electromagnetic driving force-motion acceleration cooperative features, so that possible fault modes of the mechanism are comprehensively covered, the accuracy and the real-time performance of evaluation are further improved through efficient fusion of the lightweight Transform model, the early fault missing report rate is effectively reduced, and the reliability of the mechanism is improved. And reliable guarantee is provided for safe operation of a power system.

The low-noise rigidity valve comprises a valve body and a valve seat, the valve body comprises a valve shell, a valve element, a valve rod, stop iron and an electromagnetic driving mechanism, the electromagnetic driving mechanism comprises an electromagnetic coil and a movable iron core capable of moving in the axial direction, an elastic piece is connected between the movable iron core and the stop iron, and a containing cavity is formed in the end face of the end, close to the valve seat, of the stop iron. The valve element is at least partially contained in the containing cavity, and the end, close to the stop iron, of the valve element is connected with a soft cushion block. A buffering piece made of flexible materials is connected to the inner bottom wall of the containing cavity, and the cushion block abuts against the buffering piece in the power-off state of the electromagnetic coil. According to the low-noise rigidity valve, the impact strength between the cushion block and the stop iron can be obviously reduced, and noise is low.

The utility model provides a surface treatment polishing device for mobile toilet roof processing, which comprises a motor, a turntable, a small polishing head and a polishing piece, the output end of the motor is fixedly provided with the turntable, the outer end of the turntable is provided with a connector, and a round cavity is arranged between the connector and the turntable; an electromagnetic driver is detachably and fixedly mounted in the circular cavity, and a small polishing head is detachably and fixedly mounted on the electromagnetic driver; a polishing piece is detachably and fixedly installed on the connector, and a hole is formed in the surface of the polishing piece in a penetrating mode. The small polishing head is positioned in the hole; by means of the overall arrangement, in the using process, the surface of the roof of the mobile toilet can be polished in a large area, and concave positions and convex positions on the surface of the roof of the mobile toilet can be polished under the condition that no equipment is replaced; therefore, the polishing quality of the roof surface of the mobile toilet is guaranteed, and the whole mobile toilet is more convenient and flexible.

The invention discloses pipe or bar stretching machining equipment and a stretching method. The pipe or bar stretching machining equipment comprises a mounting base, a linear motion unit, a blank clamping mechanism, an annular blowing device, a heating device, a cutting device and an automatic feeding mechanism. The linear motion unit is connected with the mounting base, the blank clamping mechanism is connected with the linear motion unit, the annular blowing device is connected with the blank clamping mechanism, the heating device is arranged on one side of the annular blowing device, and the cutting device is arranged on one side of the heating device. And the automatic feeding mechanism is connected with the mounting base. The automatic feeding mechanism is used for feeding a blank body, the blank clamping mechanism is pneumatically or electromagnetically driven to automatically clamp the blank body, the blank body which is stretched and cut off is automatically taken out or taken out by a manipulator, the speed is higher than that of manual operation, and two symmetrical products can be stretched out at a time. In the stretching process, the blank body is not directly snapped, but is cut off by laser after being fully cooled, so that free deformation of the product is avoided.

The invention relates to the technical field of medical detection equipment, in particular to a system and method for measuring the length of an ocular axis, the system comprises a probe main body structure, an ultrasonic signal receiving and transmitting module, an electromagnetic driving module, a sliding rail structure and a controller, and the probe main body structure is formed by combining a transducer and a magnetic column; the probe main body structure is arranged in the slide rail structure in a sliding manner; the electromagnetic driving module is arranged on the sliding rail structure and is matched with the magnetic column; the ultrasonic signal transceiving module is in communication connection with the transducer; according to the invention, through modular design and an innovative ejection probe structure, in combination with high-precision ultrasonic signal processing, rapid and accurate measurement of the length of the ocular axis is realized.

The present invention relates to the field of inverter fault detection, and specifically relates to an arc fault detection device for a photovoltaic energy storage inverter. It includes an inverter body and a housing sleeved outside it. A power switch is provided at the lower end of the inverter body, a transformer fixedly connected to the housing is beside it, and a detection device electrically connected to the power switch is also provided. An electromagnetic drive type circuit breaker mechanism is provided beside the detection device, which includes an electromagnetic coil, an iron core, a moving contact and a static contact. When the detection device detects an arc fault signal of the power switch, it sends a current pulse to the electromagnetic coil to make it energized to generate a magnetic field, and the iron core drives the moving contact away from the static contact. A fan for cooling is provided beside the power switch. A protection mechanism is provided beside the transformer, which is composed of an insulating cover and an insulating baffle. When the moving contact is separated from the static contact, the insulating cover moves towards the transformer and sleeves the transformer, and then the insulating baffle abuts against the insulating cover to play a protective role. This device can detect faults in the inverter and cool down and insulate the fault area.

The invention discloses a variable displacement compressor electromagnetic valve based on dynamic pressure regulation and control, and belongs to the technical field of compressor control electromagnetic valves. Comprising a valve body, a valve rod piece, a corrugated pipe assembly and an electromagnetic driving module, a valve rod sleeve capable of dividing an inner cavity of the valve body into a first containing cavity, a second containing cavity and a third containing cavity is movably embedded in the valve body, the periphery of the valve rod piece is movably sleeved with the valve rod sleeve, and a first spring is arranged between the top of the valve rod piece and the valve body; a second spring is arranged between the top of the valve rod piece and the valve rod sleeve; an exhaust port, a swash plate port and an air suction port are formed in the valve body, and a bevel edge notch and an air guide channel are formed in the valve rod piece; the valve rod sleeve can move to abut against the side wall of the bevel edge notch. The valve rod sleeve can move to abut against the surface of an inner protruding part arranged on the inner wall of the second containing cavity. According to the variable displacement compressor electromagnetic valve based on pressure dynamic regulation and control, the compressor can reach the optimal operation state under different working conditions.

The utility model discloses an electromagnetic driver which comprises a shell and an electromagnetic mechanism, and the shell is provided with an installation cavity. The electromagnetic mechanism comprises a coil assembly, a fixed iron core and a movable iron core assembly, the coil assembly is fixedly arranged in the mounting cavity, the fixed iron core is fixedly connected to the shell, the coil assembly is used for generating a magnetic field to attract the movable iron core assembly to move in the direction close to the fixed iron core, and the movable iron core assembly comprises a movable iron core, an actuating shaft, a damping block and a spring; a connecting groove is formed in the movable iron core in the axial direction, the actuating shaft is fixedly connected to the connecting groove and slidably connected to the fixed iron core, the damping block is slidably connected to the connecting groove, the spring is arranged between the actuating shaft and the damping block, and the spring is used for driving the damping block to stretch out of the connecting groove so that the damping block can abut against the shell, and noise generated during operation can be reduced. And the user experience is improved.

The utility model discloses a lens optical filter switching device for video acquisition, and relates to the technical field of optical filter switching devices. The device comprises a bottom frame, a bearing groove and a sliding cavity are formed in the bottom frame, the bearing groove communicates with one end of the sliding cavity and is the same as the sliding cavity in width, and a cover plate is clamped and buckled to the upper end of the bottom frame; the switching plate is movably laid in the sliding cavity, and two optical filters are fixedly connected to the switching plate; and the bayonet socket is inserted in the bearing groove in a sliding mode, and an electromagnetic driving piece used for driving the switching plate to move in a reciprocating mode in the length direction of the sliding cavity is arranged on the bayonet socket and in the bearing groove. According to the invention, the electromagnetic driving part is arranged on the bayonet socket, the installation operation of independent parts in the bearing groove can be reduced, the assembly is more convenient, the manpower and time are saved, when the electromagnetic driving part drives the optical filter to switch, the power-on duration can be reduced, continuous power supply is not needed, a large amount of electric energy is saved, and resources are saved.

The utility model belongs to the technical field of valves, and discloses a bidirectional inverse proportion flow valve. The bidirectional inverse proportional flow valve comprises a valve sleeve, a proportional valve element, an electromagnetic driving assembly and a compensation valve element. A valve port A and a valve port B are formed in the valve sleeve. One end of the proportional valve element is arranged in the valve sleeve and provided with a valve element hole, and fluid can flow to the valve port B through the valve port A and the valve element hole in sequence or flow to the valve port A through the valve port B and the valve element hole in sequence. The electromagnetic driving assembly is assembled on the valve sleeve and used for pushing the proportional valve element to axially move in the valve sleeve. The compensation valve element is arranged in the valve sleeve and can move in two directions in the axial direction of the valve sleeve under the action of the pressure difference between the valve port A and the valve port B. The bidirectional inverse proportion flow valve provided by the utility model can realize bidirectional inverse proportion adjustment and pressure compensation, so that the bidirectional inverse proportion flow valve can be applied to occasions requiring bidirectional proportion adjustment and pressure compensation, and is wide in application scene and high in universality.

According to the wet kraft paper box sealing machine, an upper box sealing device and a lower box sealing device each comprise a paper frame and a paper pressing guide assembly, a wet kraft paper roll is arranged on each paper frame, and wet kraft paper is guided to a wet kraft paper humidifying and heating device through a paper feeding guide part; the wet kraft paper passes through the wet kraft paper humidifying and heating device and waits for packaging boxes at outlets of the upper box sealing device and the lower box sealing device, and a wet kraft paper pressurizing part is arranged above a paper inlet of the wet kraft paper humidifying and heating device; water inlet and outlet holes of the two wet kraft paper humidifying and heating devices are connected into a water storage tank located on the rack at the lower end of the roller shaft layer through pipelines, and paper pressing guide assemblies are arranged on the front side and the rear side of the upper box sealing device and the front side and the rear side of the lower box sealing device correspondingly and located on the rear sides of the corresponding wet kraft paper. The device has the advantages that the cover plate is pressurized through the electromagnetic driving part to further pressurize the wet kraft paper, so that the wet kraft paper works smoothly; the wet kraft paper humidifying and heating device heats and humidifies the wet kraft paper to improve viscosity and facilitate box sealing.