1554results about How to "Work reliably" patented technology

The invention discloses automatic centrifugal casting equipment and a casting process, and relates to the technical field of metal casting equipment, the automatic centrifugal casting equipment comprises a centrifugal machine, a mold, an automatic mold loading and unloading device, a casting device and a control device, the centrifugal machine is a horizontal centrifugal machine, and the mold is composed of an outer mold and an inner mold; the automatic mold loading and unloading device comprises a mold pushing device, an inner mold loading and unloading device and an inner mold separating device; a clamping jaw of the inner mold assembling and disassembling device is connected with the inner mold through an inner mold lock, the inner mold assembling and disassembling device automatically achieves unlocking and locking of the inner mold lock, the inner mold and the outer mold are automatically locked or unlocked, the inner mold assembling and disassembling device is separated from the inner mold in the casting process, and the situation that the working performance of the centrifugal machine is affected by external force is avoided; the device has the advantages of high production efficiency, reliable work, long service life and the like.

The invention discloses a dual three-phase permanent magnet synchronous motor PWM modulation method and device, solves the problem of how to suppress equivalent odd switch harmonic waves of a dual three-phase permanent magnet synchronous motor driving system, and belongs to the field of motor driving noise suppression. According to the invention, a six-phase CHB drive circuit is adopted to respectively drive a phase winding of a dual three-phase permanent magnet synchronous motor; each phase of CHB driving circuit is formed by cascading N single bodies, and each single body is a full-bridge circuit powered by an independent bus power supply; unipolar carrier phase-shifting modulation is carried out on the dual three-phase permanent magnet synchronous motor by using a six-phase CHB driving circuit, a full-bridge circuit in each single body is decomposed into two half-bridges by the unipolar carrier phase-shifting modulation, two half-bridge modulation waves are staggered by 180 degrees, each carrier single body is sequentially expanded according to pi / N, and the carrier group phase of a second group of three-phase windings is integrally lagged by theta c2; and # imgabs0 # zeta is the phase belt angle of the dual three-phase permanent magnet synchronous motor. According to the invention, frequency multiplication of 4N times of equivalent switching frequency in the aspect of electromagnetic torque can be realized.

The invention discloses a hypersonic flight vehicle adaptive attitude control method based on near-end strategy optimization, and belongs to the technical field of hypersonic flight vehicle control, and the method comprises the steps: building an air-breathing hypersonic flight vehicle longitudinal dynamic model considering power; performing reinforcement learning training on the obtained environment model by using a PPO algorithm to obtain an optimized control strategy; selecting a proper state representation and action space, and designing a strategy network and a value network for the processed model, so that an original complex attitude control problem is converted into a reinforcement learning problem which can be effectively learned; and training the reinforcement learning model by using an improved PPO algorithm to obtain a final control instruction. According to the method, the model is trained by using the PPO algorithm, so that the defects of complex controller design, strict requirement on model precision and the like of a traditional control method can be effectively overcome. A simulation experiment verifies that pitch angle tracking can be effectively realized, and the stability of an execution mechanism is guaranteed.

The invention discloses an unmanned aerial vehicle auxiliary operation state adjustment method and system based on a Markov chain, and belongs to the technical field of information processing, and the method comprises the steps: S1, constructing an initial experience tuple of the Markov chain based on historical trimming data of an unmanned aerial vehicle; training a reinforcement learning model through the initial experience tuple to determine an initial strategy set; s2, constructing an uncertainty model of a cable attribute and an environment space; determining a space-time adjustment factor according to the uncertainty model; s3, updating the initial state space and the initial action space according to the space-time adjustment factor to obtain a state updating space and an action updating space; s4, reconstructing the initial experience tuple according to the state update space and the action update space to obtain a strategy adjustment path, and obtaining a target strategy set according to the strategy adjustment path; the unmanned aerial vehicle responds to the target strategy set to execute a state adjustment strategy; the unmanned aerial vehicle can make an accurate and rapid response to a complex working environment, and the working efficiency of the unmanned aerial vehicle in the complex environment is remarkably improved.

The invention belongs to the technical field of agricultural machinery, and particularly relates to an automatic artemisia selengensis planting machine which comprises a frame, a screening seedling feeding device, a screening seedling feeding power system, an eccentric wheel reciprocating intermittent planting mechanism and an advancing mechanism. The vehicle frame comprises a vehicle body, a seedling straightening baffle and a front end baffle, and the width of the vehicle body is 0.8-1.0 m; the four screening seedling feeding devices are all mounted on the seedling straightening baffle, and a seedling receiving funnel is arranged at the bottom of each screening seedling feeding device; the two eccentric wheel reciprocating intermittent seeding mechanisms are mounted on the top surface of the front-end baffle plate; the advancing mechanism comprises a plurality of farming wheels and a transmission system used for synchronously driving the farming wheels to rotate and the eccentric wheel reciprocating intermittent seeding mechanism to press seedlings. Due to the size design and the arrangement structure of the vehicle body, the whole machine is compact in structure, based on the fact that the width of an existing furrow surface in a greenhouse is 2-3 m, the compact type planting machine is highly matched with the working environment in the greenhouse, has enough operation space in the greenhouse, can efficiently execute automatic seeding operation, and is particularly suitable for small-scale planting of farmers.

The invention relates to an electric vehicle charging interface identification and positioning system for a charging robot. The system comprises a data acquisition module, a preprocessing module, a charging interface identification module, a positioning module, a posture estimation module, a control module, an environment adaptation module and an automatic learning module. According to the system, images and three-dimensional point cloud data of a vehicle are collected through a camera and a laser radar, the two-dimensional position of a charging interface is automatically recognized through preprocessing and a deep learning model, and the spatial position and posture of the interface are accurately positioned by combining a least square method with three-dimensional coordinates. The control module drives the mechanical arm to be in butt joint with the plug through PID feedback control and A * path planning, and automatic charging is achieved. And the environment adaptation module combines data enhancement and adaptive correction to improve the recognition stability of the system in complex environments such as illumination and background change. The method improves the recognition precision and real-time performance of the charging robot in different environments, and is suitable for an unattended automatic charging scene.

The invention discloses an automobile transmission shaft with a kinetic energy recovery function, and relates to the technical field of vehicle transmission. The problem of torque transmission vibration energy recovery is solved. The driving shaft is in transmission connection with a vehicle driving source, the driven shaft is in transmission connection with a vehicle driving wheel, the transition shaft is used for being in transmission connection with the driving shaft and the driven shaft, and the energy recovery part is fixed to a vehicle body. The opposite sides of the driving shaft and the transition shaft are each provided with a set of pawls. The driving shaft and the transition shaft are arranged, the driving shaft and the transition shaft are meshed and matched through the pawls, meanwhile, energy conversion is conducted through piezoelectric ceramics, so that second-order vibration energy in the forklift driving or forklift driving process can be absorbed and converted, energy recovery is achieved, meanwhile, a rubber cushion block is arranged, on one hand, vibration buffering can be conducted to a certain degree, and on the other hand, the energy recovery efficiency is improved. And on the other hand, the piezoelectric ceramics can be prevented from being damaged when being driven by a relatively large torque.

The invention discloses a target bounding box detection system and method based on a millimeter wave radar, and the system comprises a point cloud data generation module which collects a millimeter wave intermediate frequency signal through the millimeter wave radar, and generates the point cloud data of a target; the data optimization module is used for removing noise in the point cloud data by using a reflection saliency coefficient and enhancing the point cloud by using a cumulative matrix; the frame detection module is used for carrying out receiving end beam forming on the millimeter wave intermediate frequency signal to obtain a target reflection energy spatial distribution map, fusing the target reflection energy spatial distribution map and the optimized point cloud data to obtain a fused multichannel feature map, and inputting the fused multichannel feature map into a two-dimensional contour prediction neural network to obtain a two-dimensional contour image of the target; and finally detecting a bounding box of the target in combination with the optimized point cloud data. According to the method, the applicability and reliability of target bounding box detection are improved, and the method can reliably work in various environments with poor light conditions by utilizing millimeter wave radar related algorithm design.

The invention provides a high-reliability servo actuating device which comprises an actuator body, the outer end of a piston rod of the actuator body penetrates out of a connecting part at a port of the actuator body, a locking plate and a limiting thread sleeve are arranged on the outer side of the connecting part, and the locking plate can move in the length direction of the connecting part. A first limiting nut is further connected to the connecting position of the outer end of the piston rod and the connecting base in a screwed mode, an emergency centering groove is formed in the position, corresponding to the piston cavity, of the inner wall of a shell of the actuator body, an emergency centering opening is formed in the surface of the shell, and the emergency centering groove is communicated with the emergency centering opening through a centering channel arranged in the side wall of the shell. The device has the beneficial effects that the stroke is adjustable through the limiting screw sleeve and the locking plate; high-pressure oil can be led out of the shell through the emergency centering groove, and the requirement for the opening degree of a vector nozzle of an engine can be met.

The utility model discloses an automatic kiln loading clamp which comprises a large arm, a cross arm, a fixed arm, a movable arm, a supporting plate, a balance weight mechanism and a locking mechanism. The large arm is vertically arranged, and the cross arm is connected with the large arm and can move up and down relative to the large arm; the fixed arm is fixedly arranged on the cross arm, and the movable arm is arranged on the cross arm and can translate along the cross arm; the supporting plate is arranged on the opposite sides of the fixed arm and the movable arm; the counterweight mechanism is connected with the large arm and the cross arm; the locking mechanism comprises a locking air cylinder and a locking block, the locking air cylinder is transversely arranged on the large arm, the cross arm is further provided with a positioning plate, and the locking block is connected with a piston rod of the locking air cylinder. Correspondingly, the utility model further discloses an automatic kiln loading workstation. By the adoption of the device, flexible carrying of closestool blanks can be achieved, the device can adapt to changes of certain heights and gradients of the material taking end and the kiln car end, adaptability is high, and the automation degree is high.

The utility model discloses a fixed-axis rotary chassis of a circular cooler. Comprising a fixed rotating shaft, spokes, a rotating body, supporting rollers and a driving device. Wherein the fixed rotating shaft is arranged on the base; a rotating part is arranged on the rotating shaft, and spokes are mounted on the peripheral side of the rotating part; a revolving body is mounted on the peripheral side of the spoke; a plurality of supporting rollers are arranged on the lower surface of the rotary body; and the driving device is in transmission connection with the rotary body. The fixed-axis rotary chassis of the circular cooler has the advantages that the structural strength is high, and the work is reliable; the equipment radius is small, and the occupied area is small; and the device has the advantages of few mobile contacts, small abrasion, low later maintenance cost and the like.

The utility model discloses a speed reducer service life testing device. The speed reducer service life testing device comprises a test bench, a motor flange plate used for installing a servo motor, a speed reducer installing plate used for installing a speed reducer to be tested, and a torque sensor, wherein the motor flange plate, the speed reducer installing plate and the torque sensor are arranged on the test bench from front to back. The servo motor is connected with the speed reducer through an input shaft, and the speed reducer is connected with the torque sensor through an output shaft. The experiment table is provided with a plurality of key bars, a connecting plate and a mounting plate, the supporting assembly is connected with the key bars in a matched mode through mounting grooves, and the servo motor, the speed reducer, the torque sensor and the flange shaft are coaxially mounted. A positioning key strip is arranged on the test bench, and if the specification of the detected speed reducer needs to be replaced, the coaxiality in the horizontal direction is ensured while the length distance of a transmission chain is adjusted.

The invention relates to the technical field of preparation of heat-conducting materials, in particular to a preparation method of a graphene metal heat-conducting gasket, which comprises the following specific steps: S1, pretreatment of graphene, S2, plasma treatment of graphene, S3, preparation of a metal substrate, S4, nano-particle deposition of the metal substrate, S5, compounding of graphene and the metal substrate, and S6, post-treatment. According to the method, the graphene is subjected to plasma treatment, and the nanoparticles are deposited on the surface of the metal substrate, so that the bonding strength of the graphene and the metal is greatly improved, the interface thermal resistance is effectively reduced, heat can be transferred between the graphene and the metal more smoothly, and the heat transfer efficiency is improved. The heat generated in the operation process of the electronic equipment can be conducted out more quickly, the problem of local overheating is effectively avoided, the stability and reliability of the equipment are greatly improved, and the service life of the equipment is prolonged.

The invention relates to a hypocycloidal pin gear speed reducer assembly, a speed reducer and application. The speed reducer comprises an input shaft system, a first output shaft system and a second output shaft system; the number ratio of rotors to stators of the input shaft system is N: (N + 1), the section contours of the rotors and the stators are equidistant lines of a pair of conjugated hypocycloids, the rotors do planetary motion in the stators, the rotors rotate around the centers of the rotors and revolve around the centers of the stators at the same time, and the speed ratio of rotation to revolution is (N + 1): N. An input shaft rotates at the revolution speed of the rotors. Output shafts in the first output shaft system and the second output shaft system are connected through splines on the shafts and rotate according to the difference between the rotation speed and the revolution speed of a rotor, the purpose of speed reduction is achieved, and the speed reduction ratio is N: 1; and the rotor and the stator are made of steel with the hardness of over HRC58. The hypocycloid pin wheel speed reducer has the advantages of being high in transmission efficiency, stable in operation and long in service life, the outer diameter of the hypocycloid pin wheel speed reducer is smaller than the allowable maximum outer diameter of an oil well shaft, the hypocycloid pin wheel speed reducer can be suitable for screw pump oil extraction, and the technical problem that a pin wheel speed reducer cannot be suitable for an oil well all the time is solved.

The invention discloses an integrated heat exchanger which is applied to a launching device, the launching device comprises a launching cylinder, the heat exchanger comprises a plurality of heat exchange pipes, and the heat exchange pipes are distributed in the cylinder wall of the launching cylinder in the circumferential direction; the heat exchange tube comprises a condensation section, a heat insulation section and an evaporation section which are sequentially connected to form a closed tube cavity, and the tube diameter of the closed tube cavity is gradually reduced in the direction from the condensation section to the evaporation section; a liquid absorbing core is arranged on the inner wall of the closed pipe cavity, a working medium capable of conducting phase change between the gas state and the liquid state is contained in the closed pipe cavity, and the liquid absorbing core can absorb the liquid working medium and guide the liquid working medium to flow from the condensation section to the evaporation section. The heat generated by the unmanned aerial vehicle at the front part of the transmitting tube due to friction can be collected and used for heating the cavity at the tail part of the transmitting tube, so that carbon dioxide is prevented from desublimating into a solid, the temperature of the transmitting tube is balanced, and the structural integrity of the transmitting tube is ensured. The invention further provides a parameter determination method, a starting transmitting device, electronic equipment and a computer readable storage medium.

An automatic wire feeding and discharging mechanism for an automatic wire feeding electric spark wire cutting machine tool is characterized in that a numerical control push-pull mechanism composed of a motor, a chain wheel and a chain pushes and pulls a wire drawing clamping trolley, an electrode wire is clamped and pulled to the position below a wire cylinder from a lower wire guide head of the machine tool, and then the electrode wire is hooked into a wire clamp of the wire cylinder through a wire hooking mechanism; in the automatic threading process of the machine tool, the electrode wire is pulled to the position below the wire cylinder from the lower wire guide head and enters the wire cylinder wire clamp, and the wire clamp of the trolley is normally closed and can be automatically opened to clamp and release the wire. And meanwhile, the chains are stored in the chain storage box outside the processing area by utilizing the gravity and the foldable flexibility of the chains, so that the adhesion of corrosion substances during processing is avoided. In addition, a detection function for detecting whether the wire head of the electrode wire is threaded in place in the wire clamping and drawing trolley is designed, and the mechanism improves the reliability and success rate of automatic wire threading.

The utility model relates to a lightning protection plugboard with grounding detection, which is characterized in that an insulating shell is provided with a three-plug female hole on the front side and a three-plug male head on the back side, an integrated full-mode protection module is arranged in the insulating shell, the integrated full-mode protection module is provided with a circuit board, a lightning protection element and a grounding detection circuit, and the lightning protection element and the grounding detection circuit are arranged on the circuit board; the three-plug male head protrudes out of the insulation shell and is adaptively plugged with an existing socket, series connection and conduction of L pairs of L lines, N pairs of N lines and PE pairs of PE lines are respectively carried out between the three-plug male head and the three-plug female hole by adopting power lines, a lightning protection element is connected in parallel to two adjacent connection lines, and the grounding detection circuit forms a loop through electricity taking between the L lines and the PE lines. And the LED indicating lamp is exposed from the front surface of the insulating shell. According to the utility model, the plug and play is realized, the installation and the use are very convenient, and the protection between a common mode and a differential mode can be realized by adopting a full-mode protection mode that three lightning protection elements are combined into a pair of power supplies.

The invention relates to the technical field of monitoring optimization, and discloses an optimization method and system for a power equipment inclination monitoring device based on low power consumption, and the method comprises the steps: obtaining the output signal amplitude of an inclination angle sensor and the input common-mode voltage range of an operational amplifier, and calculating the inclination angle of the inclination angle sensor according to the output signal amplitude, the input common-mode voltage range and the standard parameters of the operational amplifier; selecting a plurality of candidate operational amplifiers from the plurality of operational amplifiers; testing the performance of each candidate operational amplifier by adopting an operational amplifier test circuit to obtain operational amplifier performance parameters, and selecting a preferred operational amplifier from the candidate operational amplifiers according to the operational amplifier performance parameters; the first-choice operational amplifier is integrated into the signal conditioning circuit, the structure of the signal conditioning circuit is optimized according to the power consumption characteristic of the first-choice operational amplifier, and self-adaptive power consumption control is performed on the signal conditioning circuit by adopting a preset algorithm. According to the invention, device selection and circuit optimization are carried out through comprehensive analysis, the overall power consumption of the monitoring device is effectively reduced, and the operation stability of the monitoring device is improved.

The double-track stepping type conveying mechanism comprises a track beam and a double-track track, the double-track track is horizontally installed under the track beam, a walking gap is formed in the extending direction of the double-track track, a double-track pulley hook penetrates through the walking gap from bottom to top, and a walking wheel matched with the double-track track is installed at the top of the double-track pulley hook through a pulley yoke; a poke rod capable of directionally reciprocating in the horizontal direction is arranged in the track beam, a wedge-shaped poke block is connected to the bottom of the poke rod, when the poke rod directionally moves in the extending direction, the wedge-shaped poke block can poke the pulley yoke to directionally move in a stepping mode, and when the poke rod reversely moves, the wedge-shaped poke block can deflect and reversely move to cross the pulley yoke. According to the double-track stepping type conveying mechanism, the carcasses can be conveyed one by one in the pre-cooling room in a stepping mode, the distance between the different carcasses is ensured, the conveying work efficiency is high, the quality of the carcasses can be ensured, and cross contamination between the carcasses is reduced.

The utility model belongs to the technical field of air-conditioning water heaters, in particular to a throttle valve of an air-conditioning water heater, which is characterized in that two parallel pipelines are arranged in a valve body, the first parallel pipeline comprises a first pipeline and a second pipeline, and a first capillary tube and a valve A are connected in the first pipeline; a valve B is connected in the second pipeline; the second parallel pipeline comprises a third pipeline and a fourth pipeline; a valve C is arranged in the third pipeline; and a valve D and a second capillary tube are connected in the fourth pipeline. The utility model further provides the air-conditioning water heater based on the air-conditioning water heater throttle valve. The throttle valve of the air-conditioning water heater and the air-conditioning water heater provided by the utility model are more energy-saving than an air-conditioning water heater system using solar energy, and are realized by installing the throttle valve and a pipeline at the tail end of a compressor pipeline of the air-conditioning water heater.

The invention relates to the technical field of warehouse logistics systems, in particular to an encircling type material box shuffling machine which comprises a machine frame and a controller installed in the machine frame, a driving assembly and a turnover assembly are installed on the machine frame, the output end of the driving assembly is fixed to the turnover assembly, a material box is arranged in the turnover assembly, and the turnover assembly is connected with the controller. A clamping assembly used for fixing the material box is arranged on the overturning assembly, and a clamping control assembly used for driving the clamping assembly is further arranged in the overturning assembly. According to the device, rapid and accurate clamping and overturning of the material box are achieved through an accurate controller instruction, in the process, automatic control over swing of the clamping jaw, rotation of the overturning assembly and starting and stopping of the motor is achieved, the links of manual operation are greatly reduced, the material processing speed is increased, the material processing efficiency is improved, and the labor intensity of workers is relieved. Meanwhile, the overturning shaft with the gravity center offset type rotating structure is adopted, small space can be occupied in the space layout, and the structure is simpler and more compact.

The utility model discloses a device for separating LNG (Liquefied Natural Gas) and CO (Carbonic Oxide) through dual-circulation refrigeration and cryogenic separation of mixed refrigerants and nitrogen. Comprising a main heat exchanger, a heavy hydrocarbon separator, an MRC low-temperature separator, a low-temperature separator, a hydrogen stripping tower, a hydrogen stripping tower reboiler, an LNG separation tower, an LNG separation tower reboiler, an LNG separation tower return tank, an LNG separation tower condenser, an N2 / CO separation tower, an N2 / CO separation tower reboiler, an N2 / CO separation tower return tank, an N2 / CO separation tower condenser, a mixed refrigerant compressor system and a nitrogen compression system. In addition, due to the fact that a low-temperature separator, a hydrogen stripping tower, an LNG separation tower and an N2 / CO separation tower are arranged in the process, the purity of CO is larger than 98.5% mol, and cold energy is provided for condensation and liquefaction of raw material gas and nitrogen and liquefaction and supercooling of LNG through a mixed refrigerant refrigeration cycle.

The invention relates to an intelligent multi-axis flexible robot arm coal quality detection system based on holographic imaging visual supervision and a use method, and belongs to the technical field of industrial robot application. The self-sensing bionic grabbing structure comprises a base station base, a server, a matched ash content detector, a matched moisture detector, a management and control system, a flexible arm mechanism and a plurality of self-sensing intelligent speed reducers, and a control program and an algorithm server are arranged in the base station base. The assorted ash content detectors and assorted moisture detectors of different models can be trained and learned, the flexible arm mechanism is an intelligent grabbing module for flexibly grabbing detection samples, the flexible arm mechanism is installed on the base table base, a plurality of self-sensing intelligent speed reducers are installed in the flexible arm mechanism, and the self-sensing intelligent speed reducers are arranged on the base table base. And the flexible swinging of the robot arm can be realized when the robot arm is subjected to abnormal load or external force. The device is reasonable in structural design, stable, reliable and high in automation degree, detection efficiency and operation accuracy are improved, and use requirements are met.

The invention discloses an optimization method and optimization system of an axial flow expander rotor system and a storage medium. The optimization method comprises the steps that a rotor system model is established, and the critical rotating speed of a rotor system is obtained; based on the critical rotation speed and the operation rotation speed, obtaining an isolation margin; acquiring the amplitude of the rotor based on the running speed; if the isolation margin is not less than the first threshold value and the amplitude is not greater than the second threshold value, entering the next step, otherwise, re-establishing the rotor system model; and mounting and producing according to the rotor system model. The isolation margin of the rotor system is increased, meanwhile, the amplitude of the rotor system is reduced, on one hand, reliable and stable work of the rotor system can be guaranteed, on the other hand, the high-speed and large-scale work requirements of the axial flow expansion machine can be met, and the work reliability of the axial flow expansion machine is guaranteed.

The invention provides a focal length adjustable handheld laser welding gun, and belongs to the technical field of welding guns, the focal length adjustable handheld laser welding gun comprises a gun body and a main body cover, the main body cover and the gun body are connected to form a main body cavity, a focusing assembly is arranged in the main body cavity, the focusing assembly comprises a focusing tube, the two ends of the focusing tube are provided with light transmitting mirrors to form a focusing cavity, and a focusing mirror is located in the focusing cavity; the electric air pump on one side of the gun body is communicated with the breather pipe so as to be communicated with the focusing cavity; a light emitting cylinder is arranged at the other end, corresponding to the focusing tube, of the gun body; a connector and a control module are arranged in the gun body, a control panel and a power module are arranged on the gun body, and the power module is connected with an external power source through a wire. According to the welding gun, the focusing assembly is arranged in the main body cavity, the focusing mirror is located in the focusing pipe in the focusing assembly, the focusing pipe is inflated through the electric air pump, the effect of pushing the focusing mirror to move is achieved, therefore, the focusing function is achieved, and the focal length can be flexibly adjusted according to the thickness of a welding material and the use requirement.

The invention discloses a liquid cooling heat management system and a control method thereof, which overcome the problems of poor heat dissipation capability and uneven heat dissipation of an automobile battery pack heat dissipation device in the prior art, the liquid cooling heat management system comprises a cooling box and a battery pack, the cooling box comprises a liquid cavity filled with liquid and an air cavity positioned above the liquid cavity, the whole battery pack is immersed in the liquid, and the air cavity is communicated with the liquid cavity. The liquid cavity is connected with a compressor integral liquid cooling system through a flow management unit to form a first circulation loop, the air cavity is connected with the compressor integral liquid cooling system to form a second circulation loop, and the flow management unit is connected with a control panel. The whole battery pack is immersed in the heat-conducting and non-conducting liquid, so that the battery can be cooled more efficiently or heated at low temperature, the heat dissipation effect is good, heat dissipation is more uniform, meanwhile, if the battery pack has the phenomena of sparking and the like, the battery pack can be extinguished in time, further expansion of accidents is avoided, and the safety of the battery pack is improved.

The invention discloses a double-tension-interval-based film feeding system for a multi-column packaging machine, which comprises a paper roll mechanism arranged at the bottom of a rack, and a paper film changing mechanism, a film feeding device, a swing shaft roller tensioning mechanism, a laser coding mechanism, a laser coding position adjusting mechanism and a damping mechanism are sequentially arranged at the downstream of the paper roll mechanism according to the film feeding direction, an encoder alarm device and a mark tracking photoelectric sensor mark position adjusting mechanism are further arranged on the machine frame. During working, the film feeding device pulls out a paper film from a paper film roll of the paper roll mechanism, and the brake shaft is braked by the brake block, so that the paper film forms a first tension interval between the paper roll mechanism and the film feeding device; the damping mechanism is located at the output end of the film feeding system, the paper film is wound in a swing tensioning roller shaft system of the swing shaft roller tensioning mechanism, and the swing tensioning roller shaft system droops under the action of gravity, so that the paper film forms a second tension interval between the film feeding device and the damping mechanism. The film feeding device can be matched with a multi-column packaging machine, can continuously feed films and is stable in tension.

The utility model provides a crane telescopic arm bolt device of a chain wheel and chain mechanism driven by a hydraulic motor, which comprises a locking device, the hydraulic motor, a rotating device and a supporting device, a crane telescopic arm comprises a basic arm and a plurality of sections of telescopic arms, and an arm pin is arranged at the root of each section of telescopic arm and is used for being locked and connected with the adjacent telescopic arm; the supporting device is connected with the root of the basic boom, the rotating device is installed on the supporting device, the locking device is connected to the rotating device, the hydraulic motor is connected with the rotating device and used for driving the rotating device to rotate, the rotating device is used for driving the locking device to move to each section of telescopic boom, and the locking device is used for achieving locking connection between the rotating device and the telescopic boom. After locking connection, the hydraulic motor drives the rotating device to drive the telescopic arm to stretch out or retract. The utility model has the characteristics of increasing the effective displacement of the cylinder pin and the plug pin device, reducing the size of the telescopic arm plug pin device, reducing the total weight of the boom system, reducing the manufacturing cost and having wide application range.

The utility model discloses a column type ceramic sealing type high-voltage direct current contactor with an auxiliary contact, which comprises a shell, the top of the shell is buckled with a cover plate, and the cover plate is provided with a positioning hole and a glue injection port; the cover plate is provided with a check ring along the circumferential edge, and a plurality of positioning ribs are evenly distributed on the check ring and embedded into the clamping grooves. A contact system is arranged in an inner cavity of the shell, and a gap between the contact system and the shell is filled with epoxy glue; the contact system comprises a sleeve, a ceramic cover is buckled and welded to the top of the sleeve, static contacts are symmetrically arranged on the ceramic cover and penetrate through a pair of through holes symmetrically formed in the top of an arc extinguishing cover assembly arranged below the ceramic cover, and the arc extinguishing cover assembly covers a moving iron assembly arranged below the arc extinguishing cover assembly. According to the utility model, through the structural design of the cover plate and the shell, the defect of glue overflow during glue pouring of the whole machine is overcome, and meanwhile, the potting glue has the effects of good heat dissipation effect and high fixing strength; and ceramic packaging is adopted, so that the product has the capability of sealing a small molecule arc extinguishing medium.

The utility model provides an anti-pinch device. The anti-pinch device comprises a fixed base with a containing cavity; the movable top cover can move relative to the fixed base under the action of external force; the at least one detection device is constructed to be used for detecting the displacement of the movable top cover relative to the fixed base, and the detection device is constructed to be a microswitch and comprises a base body fixed in the containing cavity and a triggering piece capable of moving relative to the base body; the displacement of the movable top cover relative to the fixed base causes the displacement of the triggering piece relative to the base body. In addition, the utility model further provides an anti-pinch system and a movable furniture unit.