1350results about How to "Prevent slipping" patented technology

The invention provides stamping equipment for automobile engine oil pan production, and belongs to the technical field of oil pan stamping equipment. Which comprises a stamping equipment body and is characterized in that a lower die and an upper die are installed on the stamping equipment body, a first supporting frame is installed on one side of the stamping equipment body, and a second supporting frame is installed on the other side of the stamping equipment body; an automobile oil pan material plate is placed on the top of the first supporting frame. By arranging the auxiliary feeding mechanism and the auxiliary discharging mechanism, the auxiliary feeding mechanism can be utilized, workers do not need to make direct contact with an automobile oil pan material plate, the automobile oil pan material plate can be rapidly and stably transferred to the position between the lower die and the upper die, and accurate alignment can be achieved after transferring, and the automobile oil pan material plate can be reliably placed on the top of the lower die; and compared with a traditional manual handheld plate feeding mode, the feeding device is safer and more reliable.

The utility model discloses an anti-tilt scaffold which comprises a steel frame and two crossed supporting rods arranged on the two sides of the steel frame, the outer sides of the four corners are respectively provided with a pair of fixing pieces, an inner rod is arranged between the fixing pieces, a plurality of limiting holes are formed in the inner rod, a sleeve rod is arranged on the outer side of the inner rod, and the sleeve rod is connected with the steel frame. An adjusting knob is arranged on the sleeve rod, through holes are formed in the two sides of the lower portion of the sleeve rod respectively, an inserting rod is arranged at the bottom of the sleeve rod, a spring is arranged on the outer side of the inserting rod, a base is arranged at the bottom of the inserting rod, rotating pieces are arranged on the two sides of the base respectively, and a bottom plate is arranged below the rotating pieces. According to the scaffold, the two sides of the steel frame can be supported, the steel frame is prevented from inclining towards the two sides, the safety risk of workers is reduced, and through friction between the inserting rods and the sleeve rods and the buffering effect of the springs, shaking of the scaffold can be reduced, and the scaffold is stabilized.

This application discloses a five-roll embossing machine, including a machine body, an embossing assembly, a paper feeding assembly, a main drive assembly, and a pressing roller. The embossing assembly includes five embossing rollers, a pair of main gears, and a pair of positioning assemblies. The pair of main gears are rotatably mounted on both sides of the machine body and driven to rotate by the auxiliary drive assembly. Each embossing roller is provided with a quick-release assembly at both ends. The quick-release assembly includes a bearing groove, a toothed cover, several pressure covers, and a fastening assembly. The fastening assembly achieves simultaneous locking of all pressure covers and toothed covers by a single bolt operation through a linkage. The main drive assembly drives the working position embossing roller and the pressing roller to rotate synchronously. The positioning assembly performs precise circumferential positioning of the main gears. This invention solves the problems of cumbersome roller changing, long time consumption, and low positioning accuracy of existing embossing machines, realizes quick roller changing by a single person and seamless switching of five patterns, and greatly improves production efficiency and equipment versatility.

The utility model relates to fiber yarn processing technical field, and disclose a kind of creel structure for fiber yarn processing, including base;The top of base is provided with mounting table, the inside of mounting table is provided with movable slot, the inside of movable slot is provided with tensioning assembly, the side of mounting table is provided with mounting hole, fixed assembly is provided in mounting hole, the outside of fixed assembly is provided with yarn drum;The tensioning assembly includes gear.The utility model drives gear rotation by starting motor, gear rotation drives two rack movement, rack movement drives fixed bin movement, fixed bin movement drives connecting rod and tensioning roller movement by connecting block, when the tension of yarn suddenly increases or reduces when operation error leads to, reset spring will drive connecting block movement, connecting block movement drives connecting rod and tensioning roller movement, to avoid the effect that yarn skids or overstretching is reached.

The utility model discloses a kind of guava planting frames, it includes support frame, the support frame inside is provided with thread, the support frame upper surface is provided with stand, the stand inboard wall is slidably connected with slider, the stand inside is provided with sliding slot, the sliding slot inboard wall is slidably connected with protruding block and recess block, the protruding block and recess block inside are provided with screw rod, the screw rod upper surface is fixedly connected with knob;Limiting rod, the limiting rod side surface is fixedly connected with support rod, the support rod and limiting rod side surface are fixedly connected with climbing rope, the limiting rod lower surface is fixedly connected with grid plate, the grid plate side surface is fixedly connected with fixed ring.Through the above structure, setting screw rod can control protruding block and recess block lifting, protruding block rises and can push slider, so that guava vine can be hung in slider surface, increase the grip of vine on the surface of planting frame, recess block can pull back slider inside stand when descending, facilitate to remove vine.

This utility model belongs to the field of mineral mining technology, specifically disclosing a support device for safe pillar recovery, including a base and a support assembly. An adjusting plate is installed on the base via a support member, and the adjusting plate is provided with multiple adjusting holes. Adjusting rods are threadedly connected to the adjusting holes. The support assembly includes a support cylinder for sleeved on the adjusting rod and a support rod for inserted into the support cylinder. A limiting plate is fixedly connected inside the support cylinder. The upper end of the adjusting rod abuts against the limiting plate, and a limiting ring is fixedly connected to the support rod. The limiting ring is operable to abut against the end of the support cylinder, thereby providing support. The threaded adjustment rod enables precise adjustment of the support height. The insertion design of the support cylinder and the support rod allows for quick adjustment of the support length. The cooperation between the limiting plate and the limiting ring effectively prevents the support assembly from slipping, ensuring stable transmission of support force during pillar recovery.

The utility model discloses a compact folding support, including two front side support pole, two rear side support pole and center connecting component, two front side support pole, two rear side support pole one end all swing joint in the four around of center connecting component, make the front side support pole and rear side support pole four -way scatter, or make all front side support pole and rear side support pole gather each other, the end of front side support pole is equipped with the hook, and the hook is swing joint with the front side support pole, and the hook can be perpendicular to the front side support pole upwards, and the rear side support pole is equipped with the auxiliary support leg, and one end of auxiliary support leg is swing joint with the rear side support pole, and the other end is used for abutting installation plane, and auxiliary support leg can be accomodate and be pasted in the rear side support pole, the utility model discloses reduce the volume under the gathering state, and it is convenient to accomodate and carry, still can be applicable to the support mobile phone with magnetic attraction through the setting magnetic attraction component, has improved the use convenience.

The application discloses a self-balancing offshore operation platform safety ladder and a use method thereof, which comprises a sliding seat arranged in a horizontal sliding mode, a connecting frame hinged to one end of the sliding seat, a footboard horizontally and rotationally connected to the connecting frame, and a counterweight hung at the bottom of the footboard, wherein a hoisting frame is installed at the top of the sliding seat, the top end of the hoisting frame is connected with the movable end of the connecting frame through a lifting rope, and a horizontal shaking buffer assembly is arranged between the connecting frame and the footboard. The self-balancing mechanism and the buffer assembly significantly improve the stability of the safety ladder under complex sea conditions, the real-time response and anti-skid design ensure the safety of personnel getting on and off the platform, and the quick installation and modular design facilitate daily use and maintenance.

The utility model discloses an anti-tear protection device of a belt conveyor, which relates to the technical field of belt conveying equipment and comprises a rack, a plurality of groups of conveying rollers uniformly arranged along the length direction of the rack and a conveying belt positioned on the plurality of groups of conveying rollers, a line laser scanner with a detection opening facing the upper portion of the conveying belt is arranged in the middle between the two sets of conveying rollers, and the line laser scanner is provided with a lens cleaning mechanism. Supports are arranged on the two sides of the rack and located in the middle of the position between the two sets of conveying rollers respectively, pressing roller sets are rotationally installed on the upper portions of the supports, pressing rollers of the pressing roller sets are attached to the top face and the bottom face of the conveying belt respectively, and a one-way rotating mechanism is arranged at the end of each pressing roller. The surface of the conveying belt can be scanned in the using process, the scanning result is transmitted to the interior of the main controller for data processing, the surface of the conveying belt is recognized, warning protection can be conducted in advance before breakage, and the using safety of the conveying belt is guaranteed.

The utility model relates to the technical field of plastic particle processing, in particular to a drying device for a plastic granulator, which comprises a drying box, and a conveying mechanism and a shifting mechanism are mounted in the drying box. A plurality of fixing rods are arranged in the water mechanism, so that plastic particles falling on water filtering plates are dispersed, the plastic particles are prevented from being gathered, the plastic particles make full contact with the water filtering plates for dehydration, and under the action of the two water filtering plates, the flowing path of the plastic particles in the vibration water removal process is prolonged; meanwhile, plastic particles on a water filtering plate are prevented from directly sliding into the drying box, it is guaranteed that the plastic particles are fully vibrated, meanwhile, under the action of a guide plate and two pieces of absorbent cotton, the plastic particles subjected to vibration water removal are wiped again and then guided into the drying box, water retention on the surfaces of the plastic particles is avoided, and the drying effect is improved. And therefore, water on the surfaces of the plastic particles fully falls off, and the drying uniformity and drying efficiency of the plastic particles are improved.

The invention relates to the technical field of automobile part production, and discloses a continuous stamping device for automobile part production, which comprises a supporting structure, a stamping structure, an auxiliary structure and a fixing structure, the stamping structure is arranged in a frame of the supporting structure, the auxiliary structure is arranged on the supporting structure, and the fixing structure is arranged on the supporting structure. The fixing structure is located below the auxiliary structure, the punching structure comprises a punch gasket, an impact rod, a punch pressing plate and an alloy punch, the punch gasket is fixedly arranged in the center of the lower surface of the platform top plate, and the impact rod is fixedly arranged below the punch gasket. The continuous stamping device for automobile part production is provided with a stamping structure, the stamping structure comprises a punch pressing plate and a rotary stamping die body, the punch pressing plate helps rapid demolding after single stamping is completed, the rotary stamping die body changes a stamping die body of an automobile part into rapid rotation switching setting, and the stamping die body and the rotary stamping die body are subjected to rapid pressing breaking and rapid switching; and the continuous punching efficiency is improved.

The utility model provides a kind of laying plate for temporary construction road, belong to building construction technical field, to solve the problem of laying plate upper surface water and easily lead to safety hazard.This device includes multiple groups of road board main part, and the two sides of road board main part adjacent are respectively fixedly connected with the upper connecting plate and lower connecting plate connected by cooperation clamping;Connecting block, fixedly connected in the length direction both ends of lower connecting plate or upper connecting plate and provided with threaded hole;Upper slope plate and lower slope plate are set in the outermost side of multiple groups of connected road board main part and respectively connected with lower connecting plate and upper connecting plate clamping;Waterproof pad, set in road board main part and slope board lower surface;The combination surface between lower connecting plate and upper connecting plate, lower connecting plate and upper slope plate, upper connecting plate and lower slope plate is all maze structure.This device is through the form of cooperation clamping of maze and the setting of waterproof pad, reduce the safety hazard caused by laying plate surface water penetration to temporary construction road.

The utility model relates to bag making machine technical field discloses a kind of non-woven fabric three-dimensional bag making machine with rubber sticking deviation correction, including bag making machine ontology, bag making machine ontology side is provided with support, support inside is provided with winding roller, support inner wall side is rotatably connected with limit roller one, support inner wall is rotatably connected with limit roller three close to limit roller one side, support inner wall is equipped with tensioning adjusting mechanism, support outer wall side is fixedly connected with mounting bracket, the mounting bracket inside is equipped with mounting mechanism.In the utility model, the basic tension is set by rotating screw one, and the dynamic tension fluctuation is absorbed by the buffer assembly composed of spring one. This static adjustment and dynamic buffering combination solves the wrinkle and deformation problem caused by uneven tension of the fabric, ensures constant conveying tension, and improves the finished product size precision and quality consistency.

The utility model relates to the field of controller silica gel button, disclose silica gel button edge anti -warp reinforcing edge structure, including silica gel base plate, the top fixedly connected with silica gel button of silica gel base plate, the outside fixedly connected with anti -warp reinforcing mechanism of silica gel base plate, the outside fixedly connected with antiskid protection mechanism of silica gel button, the anti -warp reinforcing mechanism includes reinforcing tensile edge, the outside fixedly connected in the outside of silica gel base plate of reinforcing tensile edge, the outside of reinforcing tensile edge is equipped with metal protective cover edge. In the utility model, through fixing reinforcing tensile edge outside silica gel base plate, then the metal protective cover edge is connected with the inside of shell simultaneously, and the precise positioning and locking are realized by using anti -shift joint convex point, positioning recess, extension locking boss and fitting groove, form stable connection, in this way can effectively enhance silica gel base plate edge tensile strength, resist external collision scratch, restrain edge warping deformation.

The utility model relates to the technical field of radio frequency coaxial connectors, and particularly discloses an anti-slip radio frequency coaxial connector convenient to install, which comprises a joint, a connector shell arranged at one end of the joint, a connecting block arranged at the bottom of the connector shell and an adjusting mechanism arranged below the connector shell. The adjusting mechanism comprises a threaded cylinder, a threaded groove is formed in the bottom of the connector shell, and the threaded groove is in threaded connection with the threaded cylinder; a protection mechanism is arranged at the bottom of the threaded cylinder; the protection mechanism comprises a protection plate fixedly connected with the interior of the threaded cylinder, the threaded cylinder and the protection mechanism are matched to protect the connecting block, the height can be adjusted to adapt to different scenes, the connecting block can be conveniently and rapidly connected with an external contact piece, the structure is simple, operation is convenient, and meanwhile the protection plate is made of excellent materials and designed to be anti-skid and anti-pollution. The effects of protection, convenient installation, reliable connection and convenient operation are achieved.

The utility model discloses a kind of lifting hoisting devices for wind power generation equipment installation, it is related to hoisting technical field, and the utility model includes bottom plate, the top surface side of bottom plate is equipped with limiting assembly, the top surface of bottom plate is fixedly connected with lifting assembly, the lifting assembly includes base, the top of base is fixedly connected with two first fixed plate, the opposite side of two first fixed plate One end is rotatably connected with first rotating shaft, the top of base two sides is fixedly connected with support frame, the upper portion of one end of support frame is fixedly connected with two second fixed plate, the opposite side of two second fixed plate One end is rotatably connected with second rotating shaft with the two sides inner wall of support frame, the two sides inner wall of support frame is slidably connected with limiting plate, the utility model can play the specified height of wind power generation equipment hoisting, and wind power generation equipment can be prevented from falling when avoiding power failure and power failure.

The utility model relates to an automobile pin insertion detection system. Comprising a lifting appliance mechanism, a control module, a distance measuring module and a lifting module, the control module is in communication connection with the lifting appliance mechanism, the distance measuring module and the lifting module, and the distance measuring module is installed at the top end of the lifting module and faces the bottom of an automobile; an automobile is loaded and transferred to the lifting appliance mechanism and is positioned through a positioning pin; the lifting module can drive the distance measuring module to ascend and descend, the distance measuring module is used for detecting the distance between the automobile and the distance measuring module and generating a detection signal, the control module can control the lifting module to ascend and descend and control the sling mechanism to operate, and the control module can compare the detection signal with a preset distance range to judge whether the automobile is clamped into the mounting pin or not. The device can accurately detect whether the positioning pin is inserted into the positioning hole of the automobile or not, so that various risks such as automobile slipping and the like are completely eradicated.

The utility model relates to the technical field of medical nursing equipment, in particular to a movable nursing medicine dispensing operation trolley which comprises an operation trolley body, an inner cavity of the operation trolley body is divided into an upper layer cavity and a containing cavity, and the upper layer cavity is provided with a storage drawer; a guiding handle is arranged on one side of the operating trolley in an integrated structure, the guiding handle can be pulled through a signature bearing plate and is stably fixed through a rubber clamping column, a force application notch in the end portion facilitates easy pulling of medical staff, a signature pen containing groove in the upper end face ensures that a signature tool can be obtained conveniently, and an integrated convenient operating platform is provided for the signature confirmation link of a patient. In addition, the protective fence at the top of the operation trolley can prevent articles placed on the operation table from sliding off, and by means of the design of the signature bearing plate, the safety and accuracy of nursing work are effectively improved while the operation standardization is guaranteed, and the working process of medical workers and the experience of patients are optimized.

The utility model relates to bed connecting structure field discloses a connecting structure and bed, can install fast and stably hang piece, and the connecting place hides in the stand, is more beautiful. The utility model discloses a stand, including the first bending surface, the first bending surface is provided with first bending part and second bending part, and the first bending part is with second bending part in longitudinal and transverse all staggered settings, and first bending part and second bending part all are equipped with the positioning hole, the hang piece, including the second bending surface, the second bending surface is provided with third bending part and fourth bending part, and third bending part and fourth bending part have interval in longitudinal and transverse, and third bending part and fourth bending part all are equipped with the buckle, after the stand of hang piece is connected, the first bending surface can cooperate with the second bending surface, and the buckle can be hung and buckled on the corresponding positioning hole.

The utility model relates to the technical field of grinding wheels, and discloses an ultrathin high-speed grinding wheel which comprises a grinding wheel body and is characterized in that connecting flanges are fixedly connected to the two sides of the grinding wheel body respectively, a protection mechanism is arranged outside the grinding wheel body, and the protection mechanism is used for protecting the grinding wheel body in the transferring or installing process. A connecting mechanism is arranged in the grinding wheel and used for installing and connecting the grinding wheel to machine equipment. The protection mechanism comprises an inner protection cover and an outer protection cover, the inner protection cover is slidably connected to the outer portion of the connecting flange, the outer protection cover is slidably connected to the outer portion of the inner protection cover, and two mounting shells are fixedly connected to the outer portion of the outer protection cover. According to the grinding wheel mounting device, the pin rod drives the limiting block to compress the spring to retract into the mounting shell, at the moment, the inner protective cover can slide out of the outer protective cover, the inner protective cover is completely detached for grinding wheel mounting, the situation that the grinding wheel is damaged is avoided, and the practicability of the device is improved.

The application belongs to the technical field of sensor calibration, and provides a sensor batch calibration method and system based on multi-vision fusion. First, all-around vision information of the sensor and the detection table is acquired. Pose estimation is performed by fusing the all-around vision information. Then, on the basis of the pose estimation, the sensor barycenter position, the grabbing point intensity and the avoidance of sensitive areas are considered, the grabbing point selection is optimized, the impedance control algorithm is used for flexible grabbing, the grabbing force size is automatically adjusted according to the sensor material and the surface friction coefficient, and the sensor lofting is realized. The problem of sensor deformation or damage caused by excessive grabbing force is avoided, the calibration demand of different specifications of sensors is realized, and the batch sensor calibration precision and efficiency are improved.

This utility model provides a clamp for horizontal tensioning of geomembranes in a laboratory, and the device relates to the field of hydraulic engineering technology. The clamp includes an upper clamping plate, a lower clamping plate, and a sliding groove; the upper clamping plate includes an upper plate and a protrusion; the upper surface of the lower clamping plate has a groove, and rollers are fixed to the lower surface, with several pressure devices fixed to the edge; the sliding groove provides a sliding track for the rollers on the lower surface of the lower clamping plate. This utility model can effectively solve problems such as unstable clamping of smooth geomembranes, stress concentration due to clamping effect, and the influence of clamp gravity effect on the horizontal tensile force data of the geomembrane.

The utility model discloses an apparatus for improving the surface quality of plate and strip products, comprising roller components, a cloth layer, two fixing components and a transmission component; the roller components are rotatably arranged on a support seat; the cloth layer is wrapped on the outer surface of the roller components; the two fixing components are respectively arranged on the two end surfaces of the roller components and configured to fix the cloth layer; the transmission component is connected with the rotating shaft of the roller components and configured to drive the rotation of the roller components. The utility model can reduce defects such as scratches and indentation caused by roller surface wear, burrs or impurities; improve the friction between the roller and the material, avoid slipping of the material during transmission or processing; disperse the local pressure of the roller on the material, make the force more uniform; reduce the interference of impurities on the processing process, indirectly improve the product quality.

The application discloses a preparation method of a large-bore air-cooled diesel engine piston and specifically comprises the following steps: S1, modeling and dividing regions; S2, gradient printing; and S3, coating addition; and relates to the technical field of diesel engine pistons. The preparation method of the large-bore air-cooled diesel engine piston realizes the synergistic optimization of the overall performance of the piston through gradient printing of the piston, realizes the lightweight of the piston in cooperation with the honeycomb lattice structure, reduces the abrasion amount by using silicon carbide, improves the wear resistance of the top region, forms zirconium tri-aluminum nano precipitated phases by zirconium, refines the grains, forms a composite precipitated phase by using scandium, zirconium and aluminum, improves the high-temperature strength, constructs an efficient heat conduction network by using graphene nanosheets, improves the heat conductivity of the middle region, forms a three-dimensional network by using carbon nanotubes, improves the toughness of the skirt region, and has high interfacial bonding strength by spraying a wear-resistant and corrosion-resistant coating on the surface of the piston, reduces the friction, improves the service life of the piston and effectively reduces the maintenance cost.

The utility model discloses an anti-slipping structure capable of preventing a main line locking bean from slipping, and belongs to the technical field of fishing tackles. The structure is arranged on the outer surface of a main line protection rope, the main line protection rope wraps the upper end of a main line for a certain length, the upper end of the main line is fixed to the tip of a fishing rod in a knotting mode, and a locking bean is arranged outside the protection rope in a sleeving mode and used for limiting the knotted portion. The anti-disengaging structure is a protruding structure arranged below the locking bean and can provide mechanical stopping when the locking bean slides. The protruding structure can be formed in the modes of sleeving an elastic sleeve, performing thermal shrinkage forming, bonding a prefabricated part, winding a flexible material or dispensing curable colloid and the like. The structure effectively prevents the locking bean from sliding downwards in the operation or throwing process, guarantees the stability and the use safety of a fishing tackle combination, and is suitable for various fishing tackle combination forms.

The utility model relates to the technical field of grating, disclose a kind of tugboat deck antiskid grating device, including frame, the left and right sides of the frame are provided with quick-mounting mechanism, the front side of the frame is provided with collection mechanism, the upper and lower ends of the frame are provided with limiting component, the inner wall left and right sides of the frame are provided with portable component, the quick-mounting mechanism includes two protective shells, the right end of two the protective shells is fixedly connected in the left side of the frame, the upper and lower sides of the protective shell are fixedly connected with slider, the inside of the protective shell is fixedly connected with fixed column, the left end of the fixed column is fixedly connected with buckle head, the right side of the frame is provided with two clamping grooves. In the utility model, by adding quick-mounting mechanism, solve the bolt fixing of traditional grating and the cumbersome disassembly and assembly, without tool, the quick disassembly and assembly of single steel grating can be realized, the downtime of deck maintenance is greatly shortened, and key support is provided for tugboat deck antiskid grating device.

The invention belongs to the technical field of textile processing equipment, and particularly relates to a polyester fabric dyeing and drying integrated device which comprises a fabric discharging mechanism, a dyeing mechanism and a drying mechanism. The dyeing mechanism is used for dyeing the fabric; the steam drying device is used for drying the dyed fabric; the winding mechanism is used for winding the dried fabric; the cloth storage mechanism is arranged between the winding mechanism and the steam drying mechanism and is used for guiding the dried fabric and adjusting the tension degree of the fabric; the cloth storage mechanism comprises a guiding structure used for guiding fabric and a tension adjusting structure used for adjusting and guiding the fabric. The device has the beneficial effects that stable guiding of the dried fabric is achieved through the guiding structure, meanwhile, the tension degree of the fabric is dynamically adjusted through the tension adjusting structure, the wrinkling and curling problems caused by uneven tension can be effectively solved, and the requirement for follow-up flattening operation is reduced.

This application belongs to the field of carbon fiber tube manufacturing technology, and discloses a carbon fiber tube centrifugal forming manufacturing system and process. The carbon fiber tube centrifugal forming manufacturing system includes a mold assembly and a centrifugal drive assembly. The mold assembly includes a module frame, individual frames, and mold components. The module frame is detachably connected to several individual frames, and the individual frames are detachably connected to several mold components. The mold components include a tubular mold with external hexagonal sleeves at both ends and detachably connected plugs at the ends. The centrifugal drive assembly includes a housing, a motor, and a platform. The housing and motor are mounted on the platform. A gear set inside the housing enables the motor to drive the external internal hexagonal sleeve to rotate. The internal hexagonal sleeve and the external hexagonal sleeve are inserted and engaged to drive the tubular mold to rotate and achieve centrifugal forming. This application solves the pain points of existing equipment and processes, such as poor versatility, cumbersome operation, low forming accuracy, and limited efficiency, through synergistic optimization of structure and process.

The utility model relates to the technical field of cable manufacturing, and discloses a double-layer co-extrusion sheath cable which comprises a conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulation shielding layer, a semi-conductive water-blocking tape, a soft round copper wire, a soft pure copper tape, a non-conductive water-blocking tape and a CPP tape from inside to outside. According to the double-layer co-extrusion sheath cable, the inner sheath layer and the outer sheath layer are arranged, the inner sheath layer is made of the flame-retardant PVC material with the oxygen index larger than or equal to 32%, a carbonization layer can be rapidly formed under the condition of high temperature or open fire, oxygen is effectively isolated, flame-retardant gas is released, and flame is prevented from spreading towards the interior of the cable, and the outer sheath layer is made of the high-hardness MDPE material. Although the flame retardance is general, the flame diffusion speed can be slowed down, and through the synergistic effect with the inner layer PVC, the overall flame retardant grade of the cable reaches the V-0 grade (UL 94 standard), the high-flame-retardant scene requirement is met, and the flame retardant property is further remarkably improved.