32results about How to "Free from mechanical damage" patented technology

The invention discloses an environment-friendly safe low-smoke halogen-free cable, and relates to the technical field of cables, the environment-friendly safe low-smoke halogen-free cable comprises a cable assembly, the cable assembly comprises an outer sheath, the outer surface of the outer sheath is fixedly communicated with an air outlet assembly, a plurality of conductors are arranged in the outer sheath, each conductor is hollow, and the outer surface of the outer sheath is fixedly communicated with the air outlet assembly. A plurality of filling pipes are arranged among the exteriors of the plurality of conductors, and the plurality of filling pipes are hollow; according to the environment-friendly safe low-smoke halogen-free cable, when the temperature of air around the cable is low, cold air enters the hollow conductor from the air inlet, air convection is formed in the conductor, heat is taken away and then discharged from the air outlet, and when excessive heat is generated in the use process of the conductor, the heat can enter the filling pipe through the multiple drainage holes, so that the cable is protected. And heat can flow in the conductor, so that excessive local heat dissipation of the conductor can be prevented.

The invention relates to the technical field of lithium metal battery health monitoring, and particularly discloses a lithium metal battery pack health monitoring system and method based on thin film sensors, the system comprises a plurality of thin film sensors distributed among lithium metal battery pack cells, and each thin film sensor comprises a temperature measuring unit, a pressure measuring unit, a flexible circuit board and silica gel foam; the adapter plate is electrically connected with the plurality of thin film sensors; the signal acquisition unit is electrically connected with the adapter plate and comprises a constant current source circuit, a signal conditioning circuit, a filter circuit and an analog-to-digital conversion circuit; the input end of the data transmission unit is electrically connected with the output of the analog-to-digital conversion circuit; the input end of the digital signal processor is electrically connected with the output end of the data transmission unit; and the input end of the battery management unit is electrically connected with the output end of the digital signal processor. The mechanical information and the temperature information between the battery monomers can be monitored at the same time, the battery management can evaluate the health state of the battery more comprehensively based on the information, and the abnormal problem can be warned in advance.

A wireless temperature measuring device for a cable intermediate joint comprises a cable, a first sleeve and a second sleeve. The first sleeve and the second sleeve adopt a spliced structure, are formed by sliding and inserting upper and lower splicing pieces through clamping rails and clamping grooves, and are sleeved on the outer wall of the cable intermediate joint through threaded connection. The first sleeve is provided with a temperature monitor, the second sleeve is provided with a battery box, and circuit connection power supply is achieved through an annular conducting strip and an internal conducting wire. A screen plate is arranged on the side portion of the sleeve to enhance structural strength and heat dissipation performance, and an air bag buffering device on the inner side is controlled by an inflation hole and an air valve and can buffer external impact. A temperature sensing piece at the bottom of the temperature monitor is tightly attached to the outer wall of the connector, temperature is accurately monitored, and data are wirelessly transmitted. The device is convenient to install, accurate in temperature measurement and stable in structure, and can effectively guarantee the operation safety of the cable.

The present invention relates to a motor vehicle (10) and a power battery device (12), the power battery device having at least one battery module (16) and a battery housing (20), the at least one battery module having at least one battery cell (18), the at least one battery module (16) being arranged in the battery housing, wherein the at least one battery cell (18) has a diffusion opening (26) for discharging diffusion gas from the battery cell (18), wherein at least one protective element (28) is provided in a battery housing wall of the battery housing (20), the at least one protective element being constructed to destabilize under the action of diffusion gas and to provide an opening through the battery housing wall for discharging diffusion gas from the power battery device (12).

The present invention relates to a NK cell freezing solution and its preparation method and application. The present invention uses N-tris(hydroxymethyl)methylglycine and sodium glycinate as permeable cryoprotectants, and carboxymethyl chitosan, polyglutamic acid and sodium polyglutamate as non-permeable cryoprotectants, so that the freezing solution formed after the two are blended with the culture medium is applied to the freezing of NK cells. On the one hand, the permeable cryoprotectant can penetrate into the cell, balance the electrolyte concentration and combine with water molecules, so as to protect the cell from solute and mechanical damage, and on the other hand, the non-permeable cryoprotectant can also efficiently combine with the water in the system to reduce ice crystal formation, and at the same time, it also induces intracellular dehydration and forms a protection zone, so that mechanical damage can be reduced both inside and outside the cell, and the freezing solution is endowed with excellent freezing ability for NK cells through the synergistic effect of the two without adding DMSO and fetal bovine serum, and the survival rate of NK cells after recovery is high.

The utility model belongs to the technical field of network cables, and particularly relates to a mounting mechanism of a waterproof anti-aging tensile network cable, which adopts the following scheme that the mounting mechanism comprises a network cable cell, a sheath is arranged on the surface of the network cable cell, a waterproof layer is arranged on the surface of the sheath, a tensile layer is arranged on the surface of the waterproof layer, a protective layer is arranged on the surface of the tensile layer, and a waterproof layer is arranged on the surface of the protective layer. The installation mechanism for the waterproof anti-aging tensile network cable further comprises an installation mechanism, the installation mechanism is located on the surface of the protection layer, the installation mechanism is used for facilitating later maintenance of the network cable, and the installation mechanism comprises a gasket, an installation plate, a wire hoop, an installation box, a positioning frame, a sliding sleeve, a sliding rod, a limiting rod, a pressing plate, a spring and a hook. According to the utility model, the protection layer, the tensile layer, the waterproof layer and the outer skin can carry out various types of performance protection on the network cable cell, the service life of the network cable cell is prolonged, and the subsequent network cable maintenance efficiency of an operator can be improved through the cooperative use of the installation mechanism.

The invention discloses a stem cell exosome high-activity freeze-drying formula and a freeze-drying process thereof, and relates to the technical field of biology, the stem cell exosome high-activity freeze-drying formula is prepared from the following components: 90-100 parts of stem cell exosome, 1-5 parts of sodium alginate, 3-6 parts of a sericin protein mixture, 5-15 parts of mannitol, 0.3-0.6 part of a tartary buckwheat extract, and beta-mercaptoethanol; the stem cell exosome freeze-drying formula prepared by the invention has higher activity, and can maintain higher recovery rate after hydration, so that the biological stability of the stem cell exosome freeze-drying formula is greatly improved. According to the method, moisture is directly sublimated from a solid state to a gaseous state under a vacuum condition, so that the damage to an exosome structure caused by ice crystal formation is avoided, the low-temperature and low-pressure environment can effectively reduce the oxidation and degradation reaction of the exosome, and the biological activity of the obtained stem cell exosome freeze-drying formula is kept.

This utility model provides a plastic toy injection molding device, belonging to the field of toy injection molding technology. It includes a set of uprights, with multiple stabilizing rods fixedly connected to the side walls of the uprights. A movable plate is slidably mounted on the stabilizing rods, and a movable sleeve is fixedly connected to the side wall of the movable plate. A first mold is fixedly connected to the movable plate. A stabilizing plate is fixedly connected to the side wall of the uprights, and multiple sliding plates are mounted on the top of the stabilizing plate. Multiple springs are fixedly connected to the ends of the sliding plates, and the ends of the springs are fixedly connected to the side walls of the uprights. A first rack is fixedly connected to the sliding plates. A rotating shaft is rotatably connected to the movable sleeve, and a gear is fixedly mounted on the rotating shaft. Multiple push rods are slidably connected inside the movable sleeve, and a second rack is fixedly connected to the bottom of each push rod. This utility model uses external compressed air to eject the injection molded part located in the mold groove, ensuring that the surface of the injection molded part is not mechanically damaged, which is beneficial to improving the injection molding quality.

The utility model relates to the technical field of electric power engineering, in particular to electric power construction winding equipment which comprises a base. The wire winding assembly is installed on one side of the base, and the wire winding assembly is used for winding construction wires; and the cleaning assembly is installed on one side of the base, and the cleaning assembly is used for cleaning the to-be-wound construction wire. Compared with the prior art, automatic cleaning before wire winding is achieved through the cleaning assembly, the cleanliness is improved through a dual cleaning mechanism, circulating water utilization and a precipitation filtering structure are environmentally friendly and energy-saving, meanwhile, automatic winding is driven by a motor of the winding assembly, the rotating speed is adjustable, it is guaranteed that wire coils are neat and compact, and a rigid connection structure adapts to the complex environment; and a coherent production line is formed with the cleaning assembly, the construction standardization degree is improved, and comprehensive improvement is achieved in the aspects of efficiency, management, quality, cost and the like.

The utility model relates to the field of welding alternate platform discloses a double position alternate platform of large -scale casting automatic welding house, including bearing frame, bearing frame rotatable setting in the upper of mounting base, the inner wall fixed with drive motor of mounting base, the output shaft one end of drive motor is fixed with the bottom surface of bearing frame, both ends of bearing frame all are fixed with the placing table, the left and right sides of placing table all are fixed with the pneumatic cylinder, the telescopic link one end of pneumatic cylinder extends to the placing table, the telescopic link one end of pneumatic cylinder is fixed with the clamping plate, two clamping plates between the setting have two fixed plates. In the utility model, through the cooperation of pneumatic cylinder, clamping plate, fixed plate, sleeve and connecting plate, the casting of different models can be clamped and fixed in multiple directions, the casting is kept in the center position of placing table, the accuracy of casting welding is guaranteed, and the offset of welding position in the welding vibration of casting is prevented.

This utility model provides a small-diameter digital communication transmission cable, comprising: multiple pairs of twisted wires, wherein the twisted wires are arranged on both sides of a "I"-shaped filler and twisted together to form a cable core, and the outer side of the cable core is provided with a wrapping layer, a metal foil and plastic composite layer and an outer sheath from the inside to the outside; it solves the technical problems of traditional cables being unable to achieve small outer diameter, high bandwidth, strong anti-interference, long-distance transmission and high durability, and can optimize the cable core structure to improve anti-interference performance and signal transmission bandwidth while ensuring small outer diameter and high flexibility of the cable, and takes into account electromagnetic protection and mechanical strength through composite shielding design, thereby meeting the requirements of high-speed, long-distance and high-reliability communication.

The utility model discloses a kind of gas leakage detection devices of being convenient for carrying, including detector body, connecting pipe, install the top of detector body, detection probe, install one end of connecting pipe;For achieving the protection mechanism that storage protection is carried out to detection probe, and protection mechanism is arranged at the side of detector body, the utility model is set through the setting of protection mechanism, the active protection of detection probe is realized, when device is in carrying or idle state, protection mechanism can store detection probe in protection structure, effectively avoid detection probe and external object from colliding by physical isolation, to protect its internal precision component from mechanical damage, the setting of protection mechanism is in keeping the portability of device, also significantly improve the durability of detection probe, ensure that detection probe can long-term maintain high detection accuracy and sensitivity, avoid performance attenuation or function failure caused by collision, so as to can prolong its service life.

The utility model relates to the technical field of resistors, and discloses a resistor for an integrated circuit, which comprises a resistor shell, leads penetrate through and are fixedly connected with the left end and the right end of the resistor shell, a groove is arranged in the middle of the outer wall of the resistor shell, and fillers are filled in the middle of the inner wall of the resistor shell and exist in a liquid form. According to the utility model, the pigment belt is connected to the outer wall of the dust collection resistance device and is used for improving impedance and enhancing anti-static performance, the pigment belt is made of an organic substrate material and has high-temperature-resistant and moisture-resistant effects, the high-temperature-resistant and moisture-resistant effects of the resistor body are improved, and the inner protection layer and the outer protection layer are arranged, so that the resistance of the resistor body is improved. The resistance device is protected from mechanical damage, moisture or chemical solution erosion, the resistance layer is protected from invasion and damage of moisture, pollutants or mechanical stress, and the capacitance value of the resistance device can be increased by arranging the capacitance filler.

The utility model relates to the technical field of cable protection pipes, and particularly discloses a high-strength insulation type PE cable protection pipe which comprises a protection sleeve which is a main body structure of the cable protection pipe, the protection sleeve is of a cylindrical structure, and a cable penetrates through the protection sleeve. According to the high-strength insulation type PE cable protection pipe, the two insulation arc-shaped plates in the protection sleeve and the arc-shaped reinforcing supports form an annular structure, the reinforcing supports are distributed between the insulation arc-shaped plates at equal intervals, a stable mechanical supporting system is formed, and when the protection pipe is subjected to external pressure, the reinforcing supports and the insulation arc-shaped plates cooperate to disperse the pressure, so that the protection pipe is protected. The limiting steel cable penetrates through the insulating arc-shaped plate, the two ends of the limiting steel cable are L-shaped and are inserted into the sealing rings, the overall structural stability of the protection pipe is further enhanced, and when the protection pipe is subjected to impact force or vibration, the limiting steel cable limits displacement of the insulating arc-shaped plate, component looseness is prevented, it is ensured that the protection pipe can still keep high strength under complex working conditions, and the service life is prolonged.

The utility model discloses a ground balance fixing device for distributed optical fiber earthquake monitoring, including nail body and the pressure block of being located nail body upper portion and with nail body integrated molding, the pressure block is equipped with the groove along the direction of being perpendicular to nail body axis and extending horizontally, for along the axial length direction of sensing optical cable continuously containing, limiting and pressing and pasting sensing optical cable, the length L of groove is greater than the diameter D of nail body. The utility model will traditional discrete point shape fixing mode, change for along the continuous linear fixing of optical fiber axial, through the groove of length L greater than nail body diameter D, the optical fiber length range is continuously limited and pressed and pasted to the ground, has guaranteed that optical fiber and ground surface medium form stable, uniform and continuous acoustic coupling interface.

The utility model discloses a multifunctional gasket assembly for a power interface of a computer mainboard, which comprises a gasket main body piece, the gasket main body piece comprises a bottom film and a conductive foam assembly, the bottom film is provided with an adhesive surface, the conductive foam assembly comprises a conductive foam block and a conductive fabric arranged on one side of the conductive foam block, and the conductive fabric is arranged on the other side of the conductive foam block. The conductive cloth is arranged on the rubber surface of the bottom film, and the side, deviating from the conductive cloth, of the conductive foam block is a rubber surface and is used for being matched with a power interface; a release film is further arranged on the base film at the position of the conductive foam assembly, a part of the conductive cloth is in contact with the release film, and the release surface of the release film is in contact with the conductive cloth. The multifunctional gasket assembly can provide better buffering and damping functions, conductive functions and electromagnetic shielding functions, and can well meet the requirements of a computer mainboard power interface for the stability of electrical connection and the reliability of a mechanical structure.

The utility model discloses a multi-axis laser cutting device for case sheet metal working, which comprises a support table, a bottom plate is fixedly welded in the middle area above the support table, a slide rail is fixedly welded on the outer side of the bottom plate, the slide rail is fixedly welded above the support table, a placement plate is embedded in the inner side of the bottom plate, and a laser cutting device is arranged on the placement plate. A clamping assembly is fixedly connected to the end, close to the sliding rail, of the upper portion of the containing plate. The clamping assembly utilizes a lever type transmission structure that an air cylinder is used for driving an adjusting rod, linear motion of a piston is converted into symmetrical clamping action of a clamping plate, rapid clamping of workpieces of different sizes can be self-adapted, and the surfaces of the workpieces are effectively protected against mechanical damage while stable fixing is achieved through flexible contact of a rubber pad.

The application relates to a solar cell, a photovoltaic module and a preparation method of the solar cell. The solar cell comprises a silicon substrate, a doped semiconductor layer, a colloid layer and a current collecting electrode. The doped semiconductor layer is arranged on at least one side of the silicon substrate. The current collecting electrode is arranged on the side of the doped semiconductor layer away from the silicon substrate. The electrode extends along a first direction. The colloid layer is arranged on opposite sides of the current collecting electrode in a second direction respectively. The colloid layer covers at least part of the doped semiconductor layer. The second direction intersects the first direction. By arranging the colloid layer on the opposite sides of the current collecting electrode in the second direction, the structural stability of the solar cell can be enhanced, the surface covered by the colloid layer can be protected from mechanical damage in subsequent processes, and the electrical performance of the solar cell can be improved.

The utility model belongs to the technical field of electronic equipment manufacturing, and particularly relates to a fixing structure of a sensor circuit board, which comprises a support frame, the support frame comprises a bottom plate, first pin joint plates are symmetrically and fixedly connected above one end of the bottom plate, and the inner sides of the first pin joint plates are rotatably connected with position supporting plates; a placing window is formed in the upper end face of the supporting plate in a penetrating mode, a blocking edge is fixedly connected to the edge of the bottom of the inner side of the placing window, and a blocking piece is slidably connected to the blocking edge. The upper end face of the supporting plate is rotationally connected with a lower pressing plate. By designing an adjustable gear piece and an adjusting rod, the structure allows rapid adaptation to circuit boards of different sizes and shapes. The problem that in the prior art, the fixing structure cannot adapt to various circuit board specifications is solved, the universality and flexibility of the fixing structure are improved, and the equipment can meet diversified production requirements.

The utility model discloses a universal quick-change clamp for horizontal and vertical machining, and belongs to the technical field of quick-change clamps. The welding bottom plate is installed on the base, vertical and horizontal replacement of parts can be achieved, the requirements of different directions are met, the structure is simple, and installation is convenient; the pull rod penetrates through the clamp body to be installed on the base, the expansion sleeve and the supporting gasket are installed at the other end of the clamp body, the expansion sleeve can be compressed under the action of the pull rod so that the inner hole of the clamp body can be tensioned, and the auxiliary effect on later accurate positioning is achieved; under the condition that the requirement for the position precision of the positioning pin in the clamp body is extremely high, centering is ensured under the action of the supporting gasket, the situation that the expansion sleeve is inconvenient to guide out during disassembly due to the fact that the pressure of the expansion sleeve is too large is avoided, and quick replacement of parts is achieved. Therefore, the quick-change clamp provided by the utility model can be conveniently disassembled when a part above the pull rod needs to be replaced, is high in positioning accuracy and meets the requirements of different directions of the part.

This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and more particularly to an inspection UAV for power distribution network maintenance. The UAV includes a UAV body with symmetrically fixed arms on both sides. A propeller is rotatably mounted on the top of each arm. A camera is mounted on the front end of the UAV body. A support mechanism is also present at the bottom of the UAV body, providing support during landing and significantly improving operational stability in complex environments, protecting internal precision sensors and the camera from mechanical damage. A protective mechanism is also present at the front end of the UAV body, protecting the camera with a protective cover and effectively blocking the direct impact of the propeller's downwash airflow on the camera during landing. This utility model significantly improves the efficiency and safety of power grid operation and maintenance through the cooperation of the support and protective mechanisms.

The invention provides a preparation method of a metasurface structure and the metasurface structure, the preparation method comprises a single-face preparation step of forming a metasurface on a process surface of a substrate, and the single-face preparation step comprises the following steps: S1, forming a plurality of nano structures on the process surface; s2, filling an inorganic glass material in gaps of the nano structure through a spin-coating process to form a protective layer, wherein the nano structure and the protective layer jointly form the metasurface; filling can be carried out under the conditions of normal pressure and normal temperature, the filling performance is good, expensive vacuum equipment and toxic gas are avoided, operation is easy, the cost is low, and the universality and operability of the preparation technology are improved. And moreover, the obtained inorganic glass layer serving as the protective layer has better temperature resistance and compatibility in a subsequent high-temperature process, can protect the nano structure from mechanical damage, and can be compatible with a subsequent optical coating or multi-layer structure processing technology.

The utility model discloses a copper busbar insulation structure, which belongs to the technical field of copper busbar insulation, aims at solving the problem that a copper bar is easy to be mechanically damaged and corroded, and comprises a first protective sleeve, a second protective sleeve and a third protective sleeve, a first clamping mechanism and a second clamping mechanism are respectively arranged on two sides of the first protective sleeve, and a second clamping mechanism and a third clamping mechanism are respectively arranged on two sides of the third protective sleeve. Protective layers are arranged on the outer sides of the first protective sleeve, the second protective sleeve and the third protective sleeve; according to the utility model, the first buckle, the first bayonet, the second buckle and the second bayonet are matched with one another, so that the first protective sleeve, the second protective sleeve and the third protective sleeve can be quickly mounted, the working efficiency can be further improved, and the first protective sleeve, the second protective sleeve and the third protective sleeve are matched with one another, so that the working efficiency is improved. The copper bar can be protected from mechanical damage, so that the copper bar can be damaged by mechanical impact or extrusion and the like in the using process, and the insulating sheath can prevent the damage.

The utility model provides a lithium battery impact test device which comprises a box body, a box door hinged to the front side of the box body, a transparent observation window arranged on the box door, a handle arranged on the front side of the box door, a placing plate arranged at the lower end of the box body and used for placing a lithium battery, and an impact assembly arranged at the upper end of the box body and used for impacting the lithium battery. The bottom of the box body is provided with a fixing assembly used for fixing the lithium battery, the lithium battery impact test device can not only perform impact test on the lithium battery through the impact block, but also ensure that various batteries are stably fixed at the test position through the fixing assembly by adjusting the longitudinal and transverse spacing of the clamping frame, so that the lithium battery impact test device is simple in structure and convenient to use. And diversified test requirements are met.

The utility model belongs to the technical field of bridge cables, in particular to a bridge cable anti-corrosion protection device which comprises a cable body for a bridge, two stainless steel semi-rings and two plugging covers, one end of each plugging cover is fixedly connected with a connecting rod, a sacrificial anode protection mechanism is arranged between each connecting rod and the corresponding plugging cover, and the other end of each plugging cover is fixedly connected with the corresponding stainless steel semi-ring. An anti-corrosion combined layer is fixedly arranged on the outer side of the cable body, the two stainless steel semi-rings are rotationally connected with each other, and the cable body is movably arranged in the two stainless steel semi-rings in a sleeved mode. The corrosion-resistant cable is reasonable in structural design, through the arrangement of the sacrificial anode bar, the plugging cover, the connecting ring, the stainless steel semi-ring and the corrosion-resistant combined layer, the cable body can be comprehensively subjected to a corrosion-resistant effect, so that the cable body is not prone to being corroded and damaged, the service life of the cable body is prolonged, the sacrificial anode bar which is seriously corroded can be conveniently disassembled, assembled and replaced at regular intervals, and the service life of the cable body is prolonged. The anti-corrosion effect is improved, and the reliability is high.

The utility model relates to sensor technical field discloses a kind of fiber grating strain sensors for bolt, including the steel pipe for supporting and protection, the detection component for detecting bolt strain is installed in the steel pipe, the protection component for protecting detection component is installed in the both ends of steel pipe.The utility model is fixed in the bolt inner hole to be detected using special glue with steel pipe, the strain of bolt is directly transmitted to fiber grating by special glue, the strain of fiber grating is measured to reflect the strain of bolt, the anti-electromagnetic interference characteristics of fiber grating ensure stable monitoring under complex working condition, steel pipe structure optimizes stress transmission efficiency and protects fiber grating from mechanical damage, both guarantee long-term stability under dynamic load, adapt to wide temperature range environment, and this embedded design improves the accuracy of bolt health monitoring.

This utility model belongs to the technical field of cooling equipment structure and discloses a cooling tower embedded packing bracket, including a cooling tower shell, an installation column connected to the center of the bottom of the inner wall of the cooling tower shell, and a servo motor connected to the bottom of the cooling tower shell. A rotating shaft is rotatably connected to the inner wall of the installation column. Compared with the existing fixed bracket structure, this solution introduces a servo motor drive mechanism into the packing bracket structure to realize the bracket's reciprocating rotation within a certain angle range at the outer end of the installation column. This causes the packing to generate inertial vibration during operation, thereby effectively shaking off impurities, reducing scaling, and preventing blockage. At the same time, it forms dynamic turbulence, improving heat exchange efficiency. Combined with the limiting structure and the double-sided buffer spring mechanism, it not only ensures precise and controllable rotation but also significantly reduces the impact force generated when the motor starts, stops, or reverses, effectively protecting the bracket and its connecting parts from mechanical damage. The overall structure is more stable and has a longer service life.

The utility model relates to the technical field of combined paper-covered copper flat wires, in particular to a combined paper-covered copper flat wire which comprises a main body mechanism, an insulation mechanism is fixedly installed on the inner side of the main body mechanism, a terminal box mechanism and a wiring mechanism are fixedly installed behind the insulation mechanism, and the wiring mechanism is fixedly installed behind the terminal box mechanism. A cable clamp mechanism is movably installed on the inner side of the terminal box mechanism. According to the utility model, the paper is adopted as the insulating material, the multi-layer paper pulp is coated on the copper flat wire to realize the electrical insulation effect, the combined paper-coated copper flat wire is softer and bendable compared with other traditional electric power wires, and is suitable for scenes requiring bending and wiring, and the flexibility enables the installation to be more convenient, and the cost is lower. The paper-wrapped insulating layer of the combined paper-wrapped copper flat wire provides good insulating performance, so that the combined paper-wrapped copper flat wire can be used under different environmental conditions, and meanwhile, the paper-wrapped insulating layer also has certain corrosion resistance and heat resistance, so that the copper conductor can be protected from external influence.

The utility model belongs to the technical field of cables, particularly relates to a water-resistant double-layer halogen-free low-smoke photovoltaic cable, and provides the following scheme aiming at the problems that a large amount of heat is generated when an existing photovoltaic cable works, the sealed cable cannot timely dissipate the heat, the cable is overheated, and fire hazards exist, the water-resistant double-layer halogen-free low-smoke photovoltaic cable comprises a plurality of cable cores; the cable sequentially comprises an outer sheath, a shielding layer, a waterproof layer, a flame-retardant layer and three inner sheaths from outside to inside, wherein a plurality of cable cores are uniformly arranged in the three inner sheaths; the buffer part comprises three outer support cylinders arranged in the waterproof layer, the three outer support cylinders are uniformly arranged among the three inner layer sheaths, and the three outer support cylinders are hollow and are used for providing an effective buffer space for cable bending; and hot air in the inner sheath is circulated into the outer supporting cylinder through the communicating pipe to be dispersed, so that the temperature in the cable is effectively reduced, and the service life of the cable is prolonged.

The present application relates to the technical field of auscultation equipment, and discloses a wearable closed bronchiolitis auscultation detector, which comprises a binding belt and a display controller, further comprises a detector fixedly connected with the binding belt, a clamping sleeve clamped above the detector, four sound collectors arranged on the outer side of the detector, a receiver for collecting connecting lines, a splicing sleeve comprising a set position, when the splicing sleeve is not located at the set position, the two sides of the splicing sleeve are slidingly connected in the interior of the slot shell, when the splicing sleeve is located at the set position, the receiver adjusts the length of the connecting line through the splicing sleeve and the adjusting piece. Through line dynamic adjustment, the rotator of the receiver automatically collects and releases the connecting line with the activity of children, the sleeve block is slidingly arranged outside the straight rod, so that line winding or breakage is avoided, when the splicing sleeve slides to the set position, the sleeve block is connected with the arc block, the length of the line is accurately fine-adjusted through the adjusting piece, different children's chest circumferences are adapted, the skin is neither tightly compressed nor relaxed to cause the displacement of the collector.