236results about How to "Reduce mechanical stress" patented technology

The invention discloses an electrical cabinet with strong anti-electromagnetic interference capability, and relates to the technical field of electrical cabinets, the electrical cabinet comprises a cabinet body and further comprises a protection device, a sealing door slidably penetrates through the right side of the cabinet body, a moving hole is formed in the front side of the sealing door, and a limiting hole is formed in the front side of the sealing door. The protection device comprises an operation hole, an operation rod, a T-shaped rod, a protection rod, an L-shaped plate, a filter, a reset spring and a protection disc, the sealing door moves to enable the limiting hole to be aligned with the T-shaped rod, and after the T-shaped rod is aligned with the limiting hole, the T-shaped rod moves in the direction away from the protection rod under the elastic force effect of the reset spring; the T-shaped rod moves in the direction away from the protection rod to make contact with the inner wall of the limiting hole and restore limiting of the sealing door, the sealing performance of the cabinet body is kept through the L-shaped plate, the influence of external electromagnetic interference can be prevented, the equipment failure rate is reduced, and therefore the usability of the whole system is improved.

The molecular sieve pressing structure of the nitrogen making machine comprises a tower body, a gas inlet end and a gas outlet end are arranged on the side wall of the bottom and the side wall of the top end of the tower body respectively, a feeding port and a discharging port are formed in the side wall of the top end and the side wall of the bottom end of the tower body respectively, and a bottom plate is fixedly connected to the inner wall of the bottom end of the tower body; a plurality of air holes are formed in the surface of the bottom plate, a plurality of mounting seats are fixedly connected to the inner wall of the tower body, a plurality of threaded holes are formed in each mounting seat, a bolt matched with each threaded hole is in threaded connection with the interior of each threaded hole, a top cover is mounted at the top of the tower body, and the top cover is fixedly connected with the top of the tower body. The top and the bottom of the top cover are fixedly connected with a mounting frame and a sealing block respectively, an air outlet end is arranged on the top cover, and a pressing mechanism is mounted on the mounting frame. The molecular sieves can be filled into the whole adsorption tower in a layered mode, all layers of molecular sieves can be fully pressed, and mechanical stress generated when a pressing mechanism is pressed can be effectively relieved.

The invention discloses a four-flapping-wing aircraft and an attitude control system thereof, and relates to the technical field of micro aircrafts, and the four-flapping-wing aircraft comprises a fixed rack, a guide rod, a slide block mechanism, a pitching frame, a rolling frame, a pulley and a chord driving system. The fixed rack is provided with four cantilevers, a sliding block mechanism is installed on a guide rod, and the pitching frame and the rolling frame control pitching and rolling actions through steering engines respectively. The four pulleys are connected to the pitching frame, and each pulley is hinged to one wing. The string driving system comprises a guide wheel, a string and a crank, one end of the string is connected with the slider mechanism, and the other end bypasses the guide wheel and is connected with the pulley to realize wing flapping. Through the deflectable spars and fine steering engine control, efficient aerodynamic performance, enhanced thrust output and excellent flight flexibility and adaptability are achieved, meanwhile, due to the design of the crank sliding blocks, structural stress is relieved, the service life is prolonged, the aircraft adapts to multiple flight modes, and the environment adaptability and task execution efficiency of the aircraft are improved.

The invention discloses a pressure self-adaptive adjustment and control system for a silica gel catheter, and relates to the field of self-adaptive adjusting.The pressure self-adaptive adjustment and control system comprises a pressure sensing module, a data statistics module, a data processing module, a pressure prediction module and an intelligent control module. The reflux prevention pressure and the excessive prevention pressure of the silica gel catheter are accurately adjusted; the historical pressure comprehensive performance value and the real-time pressure comprehensive performance value are combined, so that the prediction accuracy is improved; the reliability of sensing data is ensured by monitoring whether the data transmission of each module is abnormal or not, when the data transmission is abnormal, a problem module can be quickly positioned, the troubleshooting and repairing speed can be accelerated, and meanwhile, the use safety of the silica gel catheter is improved.

The invention discloses an automatic pure water ultrafiltration treatment device, and relates to the technical field of pure water graded filtering and cleaning, the automatic pure water ultrafiltration treatment device comprises a filtering bin, a pure water liquid injection device is mounted on one side of the upper surface of the filtering bin, and a cleaning liquid injection device is mounted on the other side of the upper surface of the filtering bin; compared with the prior art that pure water is pressurized to an ultrafiltration membrane in a fixed mode for ultrafiltration of the pure water, the rotation direction of the motor is automatically recognized and controlled through the sensor, so that the liquid spraying chamber can conduct ultrafiltration at different positions and heights of the ultrafiltration membrane cylinder, and excessive accumulation of the pure water on the surface of the membrane can be avoided; meanwhile, the membrane surface can be cleaned and maintained in time, the service life of the ultrafiltration membrane can be remarkably prolonged, and the replacement cost can be reduced. Compared with fixed pressurization, the automatic adjusting system can be flexibly adjusted according to different water quality, water quantity and treatment requirements. Due to the flexibility, the system can better adapt to various complex and changeable working environments, and the overall treatment effect is improved.

The invention belongs to the technical field of cable laying, and relates to a cable snakelike laying fixing device and laying method for a high-fall terrain. The cable fixing device comprises two corner pulley blocks, at least one vertical support is arranged between the two corner pulley blocks, the vertical support is connected with a cable clamp through an adjustable detachable connecting piece, and the cable clamp is used for fixing a cable on the vertical support. The vertical support serves as a supporting point for cable laying, and the cable can be stably fixed. In actual construction, the number of the vertical supports can be selected according to requirements. The adjustable detachable connecting piece enables the cable clamp to be flexibly adjusted according to laying requirements of a cable, and ensures that the cable is firmly clamped and cannot be damaged due to over-tightness or over-looseness. The direction of the cable can be flexibly adjusted through the corner pulley block, so that the cable is smoothly transited in a high-fall terrain, the snake width adjusting requirement can be met, stress concentration and abrasion caused by direct bending of the cable can be reduced, and safe operation of the cable is facilitated.

The utility model provides a pressure testing device of a pressure vessel, which comprises a bottom frame, a lifting assembly arranged at the upper end of the bottom frame, a fixed plate connected to the upper end of the lifting assembly, the lifting assembly comprises a sliding chute arranged on a base, a bidirectional screw rod rotatably arranged in the sliding chute, two ends of the bidirectional screw rod are in threaded connection with sliding blocks, and the two ends of the bidirectional screw rod are in threaded connection with the fixed plate. According to the pressure testing device of the pressure container, the pressure testing assembly can be connected with a plurality of containers to be tested in advance through the arrangement of a plurality of fourth connecting pipes, the detection speed of the containers to be tested is increased, and the pressure testing assembly can be connected with the containers to be tested through the lifting assembly. The height of the pressure test assembly is adjusted, so that the pressure test assembly can be suitable for pressure containers of different sizes and shapes, and the universality and flexibility of the device are improved.

The invention discloses a handheld charging drill with a charging function, and relates to the technical field of handheld charging drills, the handheld charging drill comprises a shell, a battery assembly is fixedly connected to the middle of the inner wall of the shell, a fixing block is fixedly connected to the top of the shell, a sliding groove is formed in the outer side of the fixing block, and the battery assembly is fixedly connected to the middle of the inner wall of the shell. A fixing plate is fixedly connected to the top of the fixing block, a protruding block is fixedly connected to the end, away from the fixing block, of the fixing plate, and a circular groove is formed in one side of the protruding block. According to the handheld charging drill with the charging function, the protruding block is driven by the fixing plate to be located in the limiting hole, so that it can be ensured that stable connection is formed between the charging assembly and the electric drill body, and by means of the tight connection mode, a battery can be effectively prevented from accidentally falling off in the using process of the electric drill; meanwhile, the fixing blocks and the fixing plates are symmetrically arranged on the two sides, so that the charging assembly is not prone to falling off under the conditions that the charging assembly is vibrated, impacted and the like.

The invention relates to the technical field of aerospace, and discloses a micro-nano satellite attitude control method based on deterministic strategy gradient and PID, and the method comprises the following steps: obtaining the pitching theta, the rolling psi and the yaw angle # imgabs0 # of a satellite through a sensitive sensor; the required control moment is converted into the attitude angle speed # imgabs 1 #, the angles theta t and psi t of the satellite in the current state are obtained according to an attitude kinematics model, and the satellite attitude quaternion error qe is determined according to the difference of the satellite attitude angles determined by a sensitive sensor through # imgabs 2 #. According to the micro-nano satellite attitude control method based on the deterministic strategy gradient and the PID, a better control strategy can be learned by adopting a deterministic strategy gradient algorithm, and by combining the deterministic strategy gradient algorithm with the traditional PID, more accurate adjustment can be carried out for the complex attitude change of the micro-nano satellite, and attitude deviation is reduced.

The invention discloses a battery negative electrode material and a preparation method thereof, and relates to the technical field of batteries. The battery negative electrode material comprises an inner core, a titanium dioxide coating layer coated on the surface of the inner core, a lithium titanate coating layer coated on the surface of the titanium dioxide coating layer, a carbon coating layer coated on the surface of the lithium titanate coating layer and a polymer coating layer coated on the surface of the carbon coating layer, the inner core comprises a silicon-based negative electrode material; the polymer coating layer comprises at least one of polyaniline, polythiophene and polypyrrole. Under the action of the four coating layers, the integrity of the silicon-based negative electrode material can be kept, direct contact between the silicon-based negative electrode material and an electrolyte is avoided, side reactions are reduced, the capacity fading of the battery in the charge-discharge cycle process is reduced, and the rate capability and the cycle stability of the battery are improved.

The invention relates to a conduction heat dissipation semiconductor side pumping module which is characterized in that semiconductor chips are packaged on a metal chip heat sink in an array mode, and a laser working substance is pumped in an end face or side face coupling mode; the clamping structure of the laser working substance sequentially comprises a crystal pressing plate, the working substance, a heat conduction strip and a crystal heat sink from top to bottom, and all the parts are tightly connected together in a pressed mode by fastening the crystal pressing plate. And a groove array is processed at the contact position of the crystal heat sink and the heat conducting strip. And deterioration of laser beam quality caused by influence of mechanical stress on a laser working substance is avoided. The radiation wavelength of the packaged semiconductor pumping chip can be distributed according to a gradient so as to maintain the pumping efficiency consistency of working substances at different environment temperatures. The pumping module can achieve heat balance of temperature in a conduction heat dissipation mode, and power consumption needed by a system is greatly reduced.

The invention provides a drainage robot and an automatic drainage method thereof, and relates to the technical field of drainage robots, the drainage robot comprises a vehicle body, and an electric push rod is fixedly mounted on the top surface of the vehicle body. The submersible pump is driven by the electric push rod to vertically move, the submersible pump can be automatically placed in a water source, the pump does not need to be manually placed in the water source, the operation steps are simplified, the labor burden is relieved, and after drainage operation is completed, through cooperative work of the friction wheel, the friction disc and the sponge column component, the water drainage efficiency is improved. The surface of the submersible pump and a water inlet pore plate are automatically cleaned, stains on the surface of the pump and the pore plate can be effectively removed, the situation that normal work of equipment is affected or drainage performance is reduced due to dirt accumulation is avoided, the manual maintenance frequency of the equipment is reduced through the automatic cleaning function, the efficient operation state of the drainage equipment can be kept, and the service life of the drainage equipment is prolonged. And the service life of the equipment is prolonged, so that the long-term maintenance cost is reduced.

The invention relates to a cabinet PDU intelligent monitoring system, and belongs to the technical field of PDU intelligent monitoring. A stress monitoring module is arranged on a bunch buckle, an image drawn according to stress and tightening force is preset in a control terminal, when the stress changes, the tightening force also changes along with the stress, and the stress monitoring module is used for monitoring the PDU. The stress monitoring module is used for monitoring the stress of the wire at the binding position of the bunch and uploading monitored data to the control terminal, the control terminal compares the data of the stress monitoring module with an image which is preset in the control terminal and drawn according to the stress and the tightening force, and the control terminal controls the bunch module to adjust the tightening force of the wire. The mechanical stress at the binding position of the wire is reduced, so that the problems that the mechanical stress is generated at the position where the wire binding buckle binds and fixes the wire, the wire is broken or the connecting position is loosened, the stability and safety of a circuit are influenced, and finally the use of a PDU intelligent monitoring system is influenced are solved.

The invention relates to the technical field of speed control in an OHT walking process, and discloses a control system for acceleration and deceleration in advance based on a path, and the system comprises a path data management module which is used for initializing and storing path data; the command and state verification module is used for verifying whether the current command of the crown block is consistent with the actual state of the crown block in real time; the exception handling module is used for continuously monitoring the deviation between the position of the crown block and a preset path; the roaming task processing module is used for identifying the roaming state of the crown block; the deceleration path calculation module is used for acquiring path speed data and dynamically calculating a safe distance and a deceleration point; the label and position judgment module is used for analyzing label information in the path; an exception ending and recovering module; and a speed control optimization module. By calculating acceleration and deceleration paths in advance, the system can ensure that the crown block reaches a proper speed before entering the speed-limiting road section, so that time waste caused by sudden deceleration or acceleration is reduced, and the overall transportation efficiency is finally improved.

The invention discloses an annealing method and tool for an iron core assembly, and belongs to the technical field of motor iron core machining, and the annealing method comprises the following steps: laminating and positioning a plurality of silicon steel sheets one by one, maintaining the pressure after laminating and assembling, and then welding and fixing to form the iron core assembly; putting the iron core assembly into a vacuum container, vacuumizing and heating the iron core assembly; after the temperature of the iron core assembly reaches the preset temperature, heat preservation is conducted for a period of preset time; and after heat preservation is finished and the temperature is reduced by 45%-50%, the vacuum container is opened, and then the iron core assembly is naturally cooled to the room temperature. The tool comprises at least two assemblies, the assemblies are in an arc shape, the inner sides of the assemblies are matched with the circumferential outer wall of the iron core assembly, and the multiple assemblies can be spliced end to end to form a barrel so as to restrain the circumferential direction of the iron core assembly; and the locking piece is used for locking and fixing the adjacent combined pieces. According to the invention, mechanical and thermal stress can be effectively eliminated, the iron loss is reduced from the overall structure, and the motor efficiency is improved when the overall structure is applied.

The application provides a battery module and a battery box. The battery module comprises a frame assembly having a receiving cavity, the frame assembly comprising a first frame extending along a second direction, and a buffer arranged in the first frame; and a cell assembly accommodated in the receiving cavity, the cell assembly comprising a plurality of cell bodies arranged at intervals along a first direction, and the cell bodies extending along the second direction; wherein the first direction and the second direction have an included angle. The application can reduce the risk of cell damage.

The utility model discloses a high-strength high-temperature-resistant drag chain cable, which comprises a plurality of wire cores, each wire core comprises a conductor and an insulating layer, the conductor is formed by twisting soft copper wires, a strand of high-strength fiber is added in each strand of twisted copper wire, the twisting pitch diameter ratio of the copper wires is 6-14 times, and the insulating layer is coated on the outer side of the conductor; filling bodies are arranged between the adjacent wire cores, and the plurality of wire cores and the filling bodies are wrapped by an outer sheath. According to the utility model, the conductor adopts the sixth kind of soft copper wires and the high-strength fibers, and the stranding pitch diameter ratio is controlled to be 6-14 times, so that the flexibility and the tensile strength of the product are ensured; the filling bodies are arranged between the adjacent wire cores, filling is carried out between each strand of wire cores, the wrapping direction of the cabling wrapping tape is kept consistent with that of the cabling, the structure enables the product to be more round and soft, friction and mechanical stress between the wire cores are reduced, and it is guaranteed that the wire cores are stressed more evenly in operation.

The present invention discloses an optimized integration method for high stress edge effect of analog BiCMOS process and a high linearity dual polycrystalline capacitor, the steps of which include: 1) depositing a polycrystalline film layer of a polycrystalline capacitor lower plate of P1 angstrom above a field oxide layer on the surface of an N-type well, and completing N-type photolithography implantation doping; 2) depositing a first dielectric layer of a dual polycrystalline capacitor of d1 angstrom, and completing the production of a protective film layer at the edge of the lower electrode of the dual polycrystalline capacitor by an exposure and etching process; 3) depositing a polycrystalline capacitor dielectric composite film layer of d2 angstroms, and completing the production of a capacitor dielectric layer structure by an exposure and etching process; the high linearity dual polycrystalline capacitor includes a substrate, an N-type buried layer, a P-type buried layer, an epitaxial layer, an N-type well, a self-aligned P-type well, etc. The present invention significantly improves the edge effect of the dual polycrystalline capacitor by integrating a high stress edge effect optimization technical solution of a high linearity dual polycrystalline capacitor in an analog integrated circuit.

The invention relates to an anti-scar frozen microneedle patch as well as a preparation method and application thereof. The anti-scar freezing microneedle patch comprises a substrate layer and a microneedle array, the material of the microneedle comprises polyvinyl alcohol; the substrate layer and the microneedle array are obtained through liquid nitrogen freezing. The invention also provides a preparation method of the anti-scar frozen microneedle patch, which comprises the following steps: mixing the substrate layer material with the curing agent, pouring, heating in vacuum and standing to obtain the substrate layer; injecting a polyvinyl alcohol solution onto the substrate layer, freezing and forming to obtain the microneedle patch; and freezing the microneedle patch in liquid nitrogen to obtain the anti-scar frozen microneedle patch. The invention further provides application of the anti-scar frozen microneedle patch in preparation of drugs for treating hypertrophic scars. The invention solves the problems of unsatisfactory treatment effect, large side effect, high price and high technical requirement in the scar treatment method.

The utility model relates to a kind of scar paste with temperature control memory effect and tension reduction function, the scar paste includes layer by layer arranged silica gel layer, shape memory metal layer, temperature control layer and waterproof layer;The silica gel layer includes the adhesive part of symmetrical adhesion in the two sides of skin wound when using, the two ends of the shape memory metal layer are connected with the adhesive part of corresponding side respectively, temperature control layer and waterproof layer are sequentially arranged on shape memory metal layer;The shape memory metal layer is used to change into preset contraction mode under skin temperature and / or the heating of temperature control layer and drive adhesive part shrink in tension reduction direction.It can drive the adhesive part of silica gel layer shrink in tension reduction direction under skin temperature compared with prior art, so as to achieve the effect of tension reduction and inhibiting scar hyperplasia, finally realize the effect of "scarless healing".

The utility model discloses a PTC heater structure, including a plurality of PTC heating tube, a plurality of radiating fins and mounting seat, a plurality of PTC heating tube installation is positioned on mounting seat, and a plurality of radiating fins interval arrangement sets up on PTC heating tube, still be provided with corrugated elastic metal sheet between a plurality of radiating fins and mounting seat, the corrugated elastic metal sheet is nickel base alloy material quality, a plurality of radiating fins and mounting seat are all aluminum material quality, the contact surface of a plurality of radiating fins is close to PTC heating tube and has coated nano alumina heat conduction coating, like this, through the elastic deformation absorption vibration energy, and gradient thermal expansion design, reduce the thermal stress, reduce the mechanical stress between mounting seat and fin aluminum pipe, prevent the connection loose after long -term use.

The invention relates to a processing method of a silicon carbide crystal ingot and a processing method of a silicon carbide substrate, and the processing method of the silicon carbide crystal ingot comprises the following steps: providing a chemical modifier comprising monovalent solid alkali and a solid oxysalt type oxidant, heating to prepare a molten mixed solution, immersing a to-be-treated surface of the silicon carbide crystal ingot into the molten mixed solution, and then plane mechanical grinding is carried out, and the to-be-treated face of the silicon carbide crystal ingot is machined into a plane. In the machining method, the used molten mixed solution can enable the surface of the silicon carbide crystal ingot to become porous and loose, the hardness of the silicon carbide crystal ingot becomes soft, the mechanical stress in the mechanical grinding process is reduced, meanwhile, a new surface exposed in the mechanical grinding process can continue to react with the molten mixed solution, and the process is repeated, so that the mechanical stress of the silicon carbide crystal ingot is reduced. And finally, a relatively flat silicon carbide crystal ingot with a smooth and crack-free surface and relatively low stress can be obtained, so that the processing efficiency is extremely high, the yield of subsequent slicing can be effectively improved, and the preparation of a high-quality silicon carbide substrate is realized.

The invention discloses a square wave driving time sequence control method, and relates to the technical field of driving signal processing, and the method comprises the steps: S1, obtaining an initial square wave waveform which comprises a rising edge and a falling edge; s2, performing expansion calculation on the rising edge and the falling edge to obtain an expanded waveform model of the whole initial square waveform; s3, performing calculation processing on the expanded waveform model based on a filtering optimization algorithm and generating optimization parameters; s4, acquiring a square wave driving time sequence according to the optimized parameters; and S5, controlling the liquid crystal terminal to work according to the square wave driving time sequence. The invention further provides a square wave driving time sequence control system. The method has the advantages of high-precision waveform description, filtering process optimization and display stability improvement.

This utility model discloses a piezoelectric ultrasonic sensor, relating to the field of sensors. It includes a mounting plate, a circuit board, and a sensor body. The circuit board is located in front of the mounting plate, and the sensor body is fixedly mounted on the front end of the circuit board. A connecting plate is fixedly mounted on the front end of the mounting plate. This utility model forms an elastic support structure. When the sensor body is subjected to external impact or vibration, the buffer spring can absorb energy through deformation, significantly reducing the mechanical stress transmitted to the circuit board and sensor body, preventing precision components from wearing or breaking due to vibration. The flow guide plate directs ambient sound waves to the sensor body, achieving a sound wave focusing effect and improving signal reception sensitivity. Furthermore, the sound wave reception angle and coverage range can be adjusted by sliding and rotating the flow guide plate to adapt to different detection scenarios. The number of flow guide plates can also be increased or decreased for customized applications.

The utility model discloses a robot connecting line protecting and reinforcing device, which relates to the technical field of robot connecting lines, comprises a fixed base, a connecting bent piece and an outer protecting tube, and is characterized in that a first rotating bearing is fixedly connected to the outer side of one end of the connecting bent piece, and a base threaded connecting piece is rotatably connected to the outer side of the first rotating bearing; the base threaded connecting piece and the fixed base are in threaded connection with each other, second rotating bearings are fixedly connected to the outer sides of the two ends of the outer protection pipe correspondingly, and threaded rings are rotationally connected to the outer sides of the two second rotating bearings correspondingly. The fixing bases are installed at the two ends of a robot outgoing line in a threaded mode, then one ends of the two sets of connecting bent pieces are installed on the two sets of base threaded connecting pieces respectively and connected to the fixing bases in a threaded mode, and a robot connecting line penetrates through the inner threading protection pipe on the inner side of the outer protection pipe.

The present application provides a three-layer shell steam turbine steam inlet structure and a steam turbine, wherein the steam inlet structure includes a steam inlet valve, a three-layer shell and a plug. The steam inlet valve includes a valve housing and a valve diffuser. The three-layer shell includes an outer shell, an outer inner shell and an inner shell. The outer shell is sealed with the valve housing flange. The plug includes an inner ring part, an outer ring part and a through hole. The first end of the outer ring part is in close contact with the valve housing through a sealing ring, and the second end is in close contact with the outer inner shell flange. The first end of the inner ring part is in close contact with the valve diffuser through a sealing ring, and the second end is in close contact with the inner shell through a sealing ring. The plug, the valve housing and the valve diffuser enclose a first interlayer cavity, and the plug, the outer inner shell and the inner shell enclose a second interlayer cavity. The through hole connects the first and second interlayer cavities. The first and second interlayer cavities and the through hole constitute a first sealed cavity. The valve housing, the outer shell, the plug and the outer inner shell enclose a second sealed cavity. The present application can improve the service conditions of the valve diffuser, the inner shell and the outer inner shell, increase the upper limit of the pressure bearing capacity, and reduce the risk of failure.

The invention relates to the technical field of power transmission towers, in particular to an ice and snow resistant power transmission tower which comprises a power transmission tower body made of metal and a wire, a plurality of fixing cylinders are symmetrically and fixedly installed at the position, close to the top, of the power transmission tower body, supporting arms are rotationally arranged at the two ends of each fixing cylinder, and threading holes are formed in the ends, away from the fixing cylinders, of the supporting arms; the wire is inserted into the threading hole, and the supporting arm is connected with the supporting arm through the buffer assembly in a matched mode; the beneficial effects of the invention are that when frost is attached to the surface of the wire, the wire can shake along the extension direction of the wire, and the shaking along the extension direction of the wire can generate a shearing force parallel to an ice layer on the surface of the wire, thereby facilitating the falling of the ice layer from the surface of the wire, reducing the compression and potential damage of ice weight to the wire, and improving the reliability of the wire. The problem that a large amount of frost is attached to the surface of the wire to cause breakage of the supporting arm is effectively solved, and the service life of the power transmission tower body is prolonged.

The utility model discloses a control box device for fresh air handling unit belongs to fresh air system control equipment technical field. The device includes the box body of installing in the one -way air duct of fresh air handling unit, and the opening direction of box body is perpendicular with the wind direction and has the outer open box door of hinged, and the door opening direction of box is the adverse wind direction, and the door closing assembly contains the vertical pressure -bearing plate, and one end is fixed to the outside of box door, and the other end is inclined to the direction of away from the box body and forms the pressure -bearing surface. The component of force that the airflow acts on the inclined pressure -bearing surface generates is converted into the door closing moment, realizes the automatic locking of box door. The problem that the control box in the air duct leads to the sealing failure of air flow impact, the operation difficult problem is solved, and the box door is locked by wind energy, and the sealing reliability is improved significantly, and the stability of equipment under the vibration, high pressure difference working condition is enhanced.

The application discloses a high-precision intelligent temperature measuring cable, which comprises at least one core, an outer sheath and at least one temperature measuring unit, the core comprises a conductor part twisted by a plurality of conductors, one temperature measuring unit is arranged in each core, the temperature measuring unit is wrapped by a plurality of conductors and arranged in the conductor part of the core and extends along the length direction of the conductor. The temperature measuring optical fiber of the application is wrapped by a plurality of conductors and arranged in the core, instead of being arranged on the surface of the core as in the prior art, so that the heat generated during the operation of the cable can be quickly transmitted to the temperature measuring optical fiber, the actual temperature of the conductor can be directly measured, instead of the temperature of the surface of the conductor or the insulating layer, and the test real-time performance and the test accuracy are improved.