143results about How to "Avoid bulging" patented technology

The invention relates to the technical field of cable manufacturing, and particularly discloses an aerial insulated cable and a production process thereof, the aerial insulated cable comprises a conductor, the outer surface of the conductor is fixedly coated with a shielding layer, the outer side of the shielding layer is fixedly coated with an insulating tube, and the outer side of the insulating tube is provided with an outer sheath. The outer surface of the insulating tube is wrapped and supported through the arc-shaped inner surfaces of the limiting tubes and the reinforcing strips, so that the insulating tube is fixed in the outer sheath, the situation that the overall structural stability of the cable is affected due to displacement of the insulating tube in the outer sheath is avoided, the inner surface of the outer sheath is supported through the supporting strips and the reinforcing strips, and the service life of the cable is prolonged. The overall structural strength of the outer sheath can be enhanced, the situation that the normal work of the cable is affected by permanent deformation of the outer sheath is avoided, meanwhile, gaps are formed among the limiting pipes, the supporting strips and the reinforcing strips, heat generated when the cable works can be dissipated, and the phenomenon that the outer sheath swells when the cable works normally is avoided.

The invention discloses a mine movable hydraulic filling retaining wall and a using method thereof, and relates to the technical field of paste filling, the mine movable hydraulic filling retaining wall comprises a frame and a carry-scraper, the frame is provided with a flexible filling wall body, the flexible filling wall body is filled with a filling body, and the other side of the flexible filling wall body is detachably connected with a movable supporting structure; the movable supporting structure is connected with the filling hydraulic folding type support, accessory materials are transported to a construction site through the carry-scraper, then the carry-scraper is moved, and the filling hydraulic folding type support is erected through the upper fixing rod and the lower fixing rod. The movable supporting structure, the filling hydraulic folding type support and part of the flexible filling wall can be dismantled for cyclic utilization, the repeated utilization rate is high, rapid installation and dismantling can be achieved, the construction efficiency is improved, and secondly, the movable supporting structure and the filling hydraulic folding type support are both supported and fixed through hydraulic pressure, so that the safety and stability are improved.

The utility model discloses cigarette packaging paper. The cigarette packaging paper comprises an inner part, an outer part, a release layer (105) and an adhesive sticker layer (106), wherein the release layer (105) and the adhesive sticker layer (106) are arranged between the inner part and the outer part; the outer part sequentially comprises an outer PE (polyethylene) lamination layer (101), an outer paper layer (102), an outer composite adhesive layer (103) and an outer PET (polyethylene terephthalate) layer (104); the inner part sequentially comprises an inner PET layer (107), an inner composite adhesive layer (108), an inner paper layer (109) and an inner PE lamination layer (110); the release layer (105) is close to the outer PET layer (104), and the adhesive sticker layer (106) is close to the inner PET layer (107). According to the utility model, the outer PE lamination layer and the inner PE lamination layer are respectively laminated on the outermost layer and the innermost layer of the packaging paper to form the double-sided laminated paper, so that the leakproofness and the barrier property of the paper are effectively improved. The pressure relief device is arranged at the bottom of the packaging box, so that the problem that the whole packaging box swells due to the fact that the sealing performance of the packaging box is improved is solved.

The invention relates to the field of coal mine roadway reinforcement, in particular to a mine dynamic pressure roadway buffering and reinforcing device. The invention provides a mine dynamic pressure roadway buffering and reinforcing device which can buffer impact generated by roadway strain when a roadway generates dynamic pressure, effectively prevent the phenomena of roadway top plate sinking and floor heaving, and protect normal use of the roadway. A mine dynamic pressure roadway buffering and reinforcing device comprises bottom plates, stand columns and the like, the bottom plates are left and right, the upper sides of the bottom plates are connected with a left set of stand columns and a right set of stand columns, and each set is composed of a front stand column and a rear stand column. The roadway top plate is supported and buffered through the top plate buffering mechanism, deformation and sinking of the roadway top plate under dynamic pressure are prevented, the roadway bottom plate is prevented from bulging under the dynamic pressure through the bottom heaving prevention and treatment mechanism, impact generated by roadway strain can be buffered when the roadway generates the dynamic pressure, and the roadway safety is improved. The phenomena of roadway roof sinking and floor heaving are effectively prevented, and the normal use effect of the roadway is protected.

The utility model relates to the technical field of cable processing equipment, and discloses a concentric steel belt armoring machine, which comprises a base, a driving seat is fixedly connected to one side of the top of the base, a hollow shaft is fixedly connected to the output end of the driving seat, and a winding frame is fixedly connected to one end, far away from the driving seat, of the hollow shaft. The end, away from the hollow shaft, of the winding frame is rotationally connected with a positioning ring, the bottom of the positioning ring is fixedly connected with a support, the bottom of the support is fixedly connected to the top of the base, the two sides of the hollow shaft are each fixedly connected with a containing disc, and the middle of each containing disc is rotationally connected with a positioning cylinder. According to the concentric type steel belt armoring machine, through cooperation of the placing disc, the positioning cylinder, the limiting disc, the positioning frame, the sleeve shell, the positioning rod, the sliding block, the spring and the clamping plate, the concentric type steel belt armoring machine can conveniently replace a used steel belt coil, and therefore the cable wrapping efficiency of the armoring machine is improved.

The invention relates to the technical field of stamping and cutting devices, in particular to a terminal stamping and cutting device. Comprising a workbench and a cutting mechanism arranged on the workbench through a mounting frame, a cavity is formed in the workbench, partition plates which are vertically distributed at intervals are arranged on the top wall of the cavity, a cavity is formed between every two adjacent partition plates, punching holes are communicated with the corresponding cavities, and negative pressure plates are arranged in the cavities. A frame is arranged on the workbench in a matched mode, a pressing block is arranged at one end of the frame in a floating mode, strip-shaped holes are formed in the two sides of the outer portion of the groove, the frame slidably penetrates through the strip-shaped holes in a matched mode, first track grooves forming a closed loop are formed in the side walls of the strip-shaped holes, and protrusions moving in the first track grooves in a matched mode are arranged on the frame. A power piece for driving the frame to move front and back is arranged in the cavity, and the negative pressure plate is driven to vertically move back and forth in the cavity while the frame moves. By means of the stamping and cutting device, machined materials are smoother, the subsequent stamping and cutting effect is improved, and the overall yield is increased.

The anti-explosion oil pipe comprises an oil pipe, one end of the oil pipe is connected with a first pipe connector, and the end, away from the first pipe connector, of the oil pipe is connected with a second pipe connector. And a sleeve sleeves the outer side of the oil pipe and pressurizes the oil pipe. The oil pipe is prone to collision, extrusion or friction in the working process, the sleeve is arranged on the outer side of the oil pipe, oil pipe abrasion can be reduced, the risk of oil pipe damage is reduced, the anti-pressure capacity of the oil pipe is improved, the oil pipe slope fracture risk is reduced, and the oil pipe anti-explosion capacity is improved.

The invention provides a chopped-continuous fiber composite reinforced repairing composite material and a construction method thereof.The chopped-continuous fiber composite reinforced repairing composite material comprises a low-fiber-mixing-amount layer, a medium-fiber-mixing-amount layer and a surface layer which are sequentially arranged, the low-fiber-mixing-amount layer and the medium-fiber-mixing-amount layer both contain chopped reinforced fibers, and the chopped reinforced fibers are at least one of PVA fibers and PE fibers; the low-fiber-mixing-amount layer contains 0.08%-0.3% of chopped reinforced fibers, the medium-fiber-mixing-amount layer contains 0.15%-0.6% of chopped reinforced fibers, the surface layer contains synthetic fiber untwisted yarn three-dimensional fabric, and the thickness of the synthetic fiber untwisted yarn three-dimensional fabric ranges from 3 mm to 5 mm. By adopting the bottom, middle and surface three-layer gradient structure, dense fibers are configured on the surface with larger stress, so that the reinforcing efficiency of the fibers can be improved, the structure repairing effect can be improved, and the phenomenon that a repairing layer swells due to the fact that synthetic fibers are difficult to disperse and agglomerate is avoided.

The present invention relates to the technical field of saline-alkali land construction, and provides a saline-alkali land soil film covering device and method, comprising a machine body and a film delivery structure arranged at the top of one end of the machine body; a mounting base, a lifting assembly is arranged at the middle position between the top of the mounting base and the top of the machine body; a soil delivery structure, the soil delivery structure is fixedly mounted at one end of the mounting base; a crushing assembly, the crushing assembly is arranged at the bottom of the middle position of the soil delivery structure; and a discharging assembly, the discharging assembly is arranged at the middle position at the bottom of the crushing assembly. In the present invention, a side compaction plate is used to compact the soil covered on the side of the ground film skin to form the side compaction performance of the ground film skin, so that the entire side compaction structure is relatively simple, and a recessed area is pressed out on the ridge that has been covered with film by a groove pressing block, so that the dry and crushed soil falls into the recessed area, forming the top compaction performance of the ground film skin, ensuring the stability of the top of the ground film, and avoiding the problem of bulging.

The utility model provides sofa chair fabric punching equipment, and belongs to the technical field of sofa chair processing. Comprising a workbench, a machining groove is formed in the top of the workbench, two mounting frames are rotatably mounted on the inner wall of the machining groove, tensioning rollers are rotatably arranged in the mounting frames, a punching assembly is slidably arranged in the machining groove, a plurality of punching needles are fixed to the top of the punching assembly, and two reset springs are fixed between the bottom of the punching assembly and the inner bottom wall of the machining groove; two second hinge seats are fixed to one end of the mounting frame, connecting rods are connected between the first hinge seats and the corresponding second hinge seats in a hinged mode, a fixing frame is fixed to the top of the workbench, a hydraulic cylinder is fixed to the top of the fixing frame, a telescopic rod of the hydraulic cylinder is connected with a pressing block, and a collecting cavity is formed in the pressing block. A plurality of through holes communicated with the collecting cavity are formed in the bottom of the pressing block. The punching device can stretch and flatten the punching position of the fabric, so that the punching position is prevented from generating bumps, and the punching quality is ensured.

According to the intelligent construction method for reinforcing the gas-melting type frozen soil foundation, a bidirectional stirring pile machine is adopted for drilling downwards, a drill rod of the pile machine is an inner-outer double-layer drill rod, the bottom end of the inner drill rod extends out of an outer drill rod and is provided with a spray hole, a suction channel is formed between the outer drill rod and the inner drill rod, and a suction hole is formed in the bottom end of the outer drill rod; in the drilling process, saturated steam is intermittently sprayed into a drill hole through the spraying holes, stirring is carried out while spraying is carried out, ice water formed after melting is sucked through the suction holes, and back flushing is carried out on the suction holes through high-pressure gas in the period; high-pressure gas is sprayed into the drill hole during drill lifting, the suction hole is kept to suck ice water during lifting, and the high-pressure gas is adopted for backflushing. During drilling, melting of ice water in the frozen soil can be accelerated by spraying saturated steam to the frozen soil, and the temperature of the saturated steam is inversely proportional to the drilling speed, that is, the lower the drilling speed is, it shows that the current frozen soil is difficult to melt, so that the temperature of the saturated steam is increased, and the melting speed of the frozen soil is greatly increased compared with a traditional method.

The utility model belongs to the technical field of aluminum profile surface treatment, and particularly relates to a sprayed aluminum profile coating curing device which comprises a curing box and two sealing box doors, the two sealing box doors are hinged to the left side and the right side of the front face of the curing box respectively, and a curing device body is arranged in the curing box. According to the sprayed aluminum profile coating curing device, an aluminum profile is hung on a lifting hook, and a rotating motor is started to drive a rotating shaft to rotate in a sealing bearing, so that the aluminum profile on the lifting hook is driven to rotate, comprehensive drying and curing are conducted on the aluminum profile, and it is ensured that the curing efficiency is consistent; an air blower is started to blow air into the flow dividing box for heating, then the air flows into the air guiding box and is uniformly blown to the surface of the aluminum profile through the flow guiding air outlet holes for drying and curing, and in the process, the temperature in the flow dividing box is slowly increased through an electric heating rod, so that the situation that the temperature is instantly increased is avoided; and bumps are formed on the surface of the aluminum profile.

The utility model discloses an anti-wrinkle and water-repellent fabric which is characterized by comprising a water-repellent fabric layer, a warp and weft double-elastic anti-wrinkle fabric layer and an antibacterial elastic fabric layer, the water-repellent fabric layer is formed by interweaving polyester low stretch yarns serving as warps and wefts, and a water-repellent finishing agent is attached to the surfaces of the polyester low stretch yarns; the warp and weft double-elastic anti-wrinkle fabric layer is formed by interweaving anti-mosquito elastic yarns serving as warp and weft yarns; the antibacterial elastic fabric layer is formed by interweaving chinlon 6 semi-dull low-stretch yarn spandex wrap yarns serving as warp yarns and cotton Modal Hiss Moore plied yarns serving as weft yarns. According to the anti-wrinkle and water-repellent fabric disclosed by the utility model, the water-repellent fabric layer has a good water-repellent effect, so that the fabric can be prevented from being soaked by water drops; the warp and weft double-elastic anti-wrinkle fabric layer has good elasticity and an anti-mosquito effect; the antibacterial elastic fabric layer has excellent biological antibacterial property and comfort; the garment integrally made of the fabric can avoid deformation and bulging of knees, elbows and other parts due to long-time wearing, and has a certain anti-wrinkle effect.

This utility model discloses a well-formed packaging box, relating to the field of packaging structure technology. It includes a main body area and a lid area for sealing. At least one lid area has an adhesive portion, which includes a first adhesive area, a cutout area, and a second adhesive area. After the packaging box is assembled, the multiple lids in the lid area form a structure of at least three layers, sequentially including an inner lid, a middle lid, and an outer lid from the inside to the outside of the box. By providing a first adhesive area on the inner lid, a cutout area on the middle lid corresponding to the first adhesive area, and a second adhesive area on the outer lid near the middle lid, the outer lid can simultaneously adhere to the inner lid through the cutout area when it is glued to the middle lid. This increases the number of lids that can be glued and fixed, avoids some lids from bulging or warping, and ensures the overall aesthetics and structural stability of the packaging box.

The utility model relates to the technical field of automobile seat fabric processing, and discloses an automobile seat fabric compounding device which comprises a processing table, the right end of the processing table is fixedly connected with a bonding mechanism, and the top of the bonding mechanism is fixedly connected with an adjusting mechanism; the bonding mechanism comprises a motor, the motor is fixedly connected to the right end of the machining table, one end of the motor is fixedly connected with a lead screw, the surface of the lead screw is in threaded connection with a threaded block, the left side and the right side of the threaded block are fixedly connected with supporting blocks correspondingly, and long rods are slidably connected into the supporting blocks. The top of the threaded block and the top of the supporting block are fixedly connected with a U-shaped frame. According to the automobile seat fabric compounding device, the flattening rods extrude fabrics, so that air possibly existing between the fabrics is exhausted, the phenomena of gaps and bumps between multiple layers of fabrics are avoided, glue in the fabrics is uniformly distributed, the fabrics are bonded more tightly, and the compounding forming quality of the automobile seat fabrics is improved.

The invention relates to the technical field of battery detection, in particular to a device for simultaneously evaluating health states of multiple groups of lithium batteries, which comprises an evaluation box body, a detection assembly is arranged on the inner wall of the evaluation box body, the detection assembly comprises a detection table located on the inner wall of the evaluation box body, and a plurality of detection boxes are arranged at the top of the detection table. The device comprises a plurality of detection boxes, the outer walls of the plurality of detection boxes are provided with a power transmission box, the outer wall of the power transmission box is provided with a control button, and the outer walls of the plurality of detection boxes are provided with exhaust ports. The movement of the piston accelerates the temperature rise in the box, the exhaust valve fixedly connected with the front end of the second connecting pipe is opened after the temperature sensor monitors that the heat is sufficient, and the piston moves to drive air to enter so as to realize rapid cooling, so that the swelling or explosion of qualified batteries caused by too slow temperature reduction is prevented, and the potential safety hazard is reduced.

The utility model belongs to the technical field of adhesive label paper, and discloses high-temperature-resistant hot-melt pressure-sensitive adhesive label paper which comprises a base paper layer, an adhesive layer connected to the lower surface of the base paper layer, a plurality of heat dissipation grooves formed in the base paper layer, a plurality of through grooves formed in the bottoms of the heat dissipation grooves, and an ink layer arranged on the upper surface of the base paper layer. The upper surface of the ink layer is covered with a corrosion-resistant layer, and the lower surface of the adhesive layer is connected with a release paper layer. According to the device, the heat resistance of the label paper can be improved, the condition of swelling caused by long-term use in a high-temperature environment is avoided, and the practicability of a product is improved.

The utility model discloses a powder pressing die with breathable steel, which comprises a base, a support frame mounted on the base, a jacking mechanism mounted on the support frame, a lower die plate fixedly connected with the jacking mechanism, a first guide post mounted on the support frame, a die plate mounted on the first guide post, a second guide post mounted on the die plate, and a top plate mounted on the second guide post. A downward pressing mechanism is installed on the top plate and fixedly connected with the upper die plate, and a cleaning mechanism is installed on the upper die plate. Due to the arrangement of the breathable steel, air can be smoothly exhausted through the breathable steel in the process that powder is compacted, the situation that air is pressed into the powder through the pressing block, and a pressed powder cake is swelled is avoided, and therefore the quality of the pressed powder cake is improved; air in the compressed air storage tank sequentially passes through the air conveying pipe and the air inlet pipe to enter the ventilation steel, powder in the ventilation holes in the ventilation steel is blown away, and therefore the powder is prevented from being left on the pressing block, and the problem that the powder is left on the pressing block is solved.

The utility model discloses a photosensitive reversible color-changing water transfer printing printing paper conveying device which comprises a base, a driving motor and four supporting plates are arranged at the top of the base, a conveying mechanism is connected among the four supporting plates, the driving motor is rotationally connected with the conveying mechanism through a driving piece, a baffle is connected between every two adjacent supporting plates in the left-right direction, and the baffle is connected with the driving motor. A plurality of combing pieces are connected between the two baffles, an air exhaust plate is arranged in the conveying mechanism, and an air exhaust mechanism is arranged at the bottom of the air exhaust plate. When the device conveys calico paper, an air exhaust motor shaft can drive fan blades to rotate rapidly through a rotating shaft, the fan blades can exhaust air in an air bellow and suck air in an air exhaust plate into the air bellow, and then air above a conveying belt can be sucked into the air exhaust plate through through holes, so that certain negative pressure can be formed on the top of the conveying belt, and therefore the calico paper is conveyed through the air exhaust plate. The printing paper can be tightly adsorbed on the conveying belt so as to prevent the printing paper from bulging, meanwhile, the printing paper can be combed to be flat by the combing hairs so as to prevent the printing paper from wrinkling, and the transfer printing quality of the printing paper can be guaranteed.

The utility model relates to the technical field of safety air bag, concretely relates to a far end air bag air bag pull belt of composite structure, including air bag, the air bag is composed of two air bag main pieces, is provided with the composite pull belt mechanism between two air bag main pieces, the composite pull belt mechanism includes horizontal limiting pull belt mechanism and longitudinal limiting pull belt mechanism, horizontal limiting pull belt mechanism is used for limiting air bag horizontal expansion, longitudinal limiting pull belt mechanism is used for limiting air bag longitudinal expansion, and the composite pull belt mechanism is formed through C type pull belt and X type pull belt, and C type pull belt limits air bag longitudinal excessive expansion, and X type pull belt controls horizontal volume, makes air bag realize optimal protection coverage in limited space, improves air bag use effect.

The utility model provides a kind of explosion-proof and leakage-proof shell structure of solid capacitor, including shell, shell includes lower shell and upper shell, the bottom of lower shell is provided with the base that is outwardly convex, for stabilizing shell, the outer side of lower shell is fixedly connected with protective strip, lower shell bottom upper end surface is provided with pin protection sleeve, the top inner wall of lower shell is fixedly connected with inboard edge strip, the upper end surface of inboard edge strip is provided with guide hole, the lower end surface of upper shell is fixedly connected with guide column;Lower shell is provided with mounting assembly inside, for installing solid capacitor.The utility model sets up heat dissipation hole on upper shell, cooperate lower shell heat dissipation cavity, heat is dissipated immediately, prevent the risk of bulging and explosion caused by internal pressure sudden rise;Lower shell bottom is provided with pin protection sleeve, positive and negative pole pin is inserted into protection sleeve, avoid pin skew, misplacement, while pin protection sleeve provides external support for pin, prevent pin from shaking after welding.

The utility model discloses a heat sealing mechanism for a soft package lithium battery, which belongs to the technical field of soft package lithium battery processing and comprises a bottom plate, a heat sealing strip is attached and fixed on the side surface of the bottom end of a lower connecting plate, a power supply electrically connected with the heat sealing strip is fixed at the top of a movable plate, and a support frame plate b is arranged at the top end of the bottom plate. The support frame plate b is internally provided with a rolling assembly for smoothing the aluminum foil of the soft package lithium battery, and one side of the support frame plate b is provided with a moving assembly; the rolling assembly in the support frame plate b is driven by the moving assembly to reciprocate above the soft package lithium battery, the surface of the soft package lithium battery is rolled and flattened by the rolling assembly, so that the surface of the soft package lithium battery is repeatedly rolled and flattened by matching of the rolling assembly and the moving assembly, air in the soft package lithium battery is exhausted, and the surface of the soft package lithium battery is flattened. Wrinkles on the surface of the aluminum foil layer are removed, a gap between the aluminum foil layer of the lithium battery and a battery cell is eliminated, and the problem that the soft package lithium battery is swelled after heat sealing is avoided.

The utility model discloses a double-sided paint spraying device for aluminum alloy lampshade processing, and relates to the technical field of paint spraying equipment, the double-sided paint spraying device for aluminum alloy lampshade processing comprises a paint spraying box, the top of the paint spraying box is fixedly provided with a storage box, one side of the storage box is fixedly provided with a valve, and the output end of the valve is fixedly provided with a connecting hose; a motor is fixedly installed on one side of the paint spraying box, a threaded rod is fixedly installed at the output end of the motor and rotationally connected in the paint spraying box, so that the cleaning brush moves, and the swing rod and the cleaning brush make the cleaning brush make contact with the surface of the aluminum alloy lampshade through the torsion effect of a torsion spring. And the aluminum alloy lampshade is cleaned when the frame-shaped spray head moves, dust is prevented from being accumulated on the surface of the aluminum alloy lampshade, dust on the surface of the aluminum alloy lampshade is avoided to the maximum extent, and protruding shapes are prevented from being formed on the surface of the aluminum alloy lampshade.

The invention discloses a ceramic valve plate polishing machine which is used for polishing the upper end face and the step face of a ceramic valve plate and comprises a support, a clamp and a rotary driver and further comprises a polishing mechanism arranged over the clamp. The polishing mechanism comprises a downward pressing frame body, a side pressing assembly arranged on the downward pressing frame body and used for making contact with the step face and an abutting assembly arranged on the downward pressing frame body and used for making contact with the upper end face, and the side pressing assembly is provided with a polishing block capable of horizontally sliding on the downward pressing frame body. The abutting assembly is provided with a polishing disc capable of vertically sliding on the downward pressing frame body, and a linkage piece is arranged between the polishing block and the polishing disc. The ceramic valve plate is driven by the clamp to rotate, and the action of the polishing disc and the action of the polishing block are ensured not to influence each other in combination with the alternate action of the polishing disc and the polishing block, so that the upper end surface and the step surface of the ceramic valve plate can be fully polished.

The utility model discloses a solar cell, which comprises a main grid and a fine grid, and is characterized in that two ends of a first section of the main grid are provided with harpoon parts for collecting current at the edge of the solar cell; the fine grids comprise first fine grids, and the first fine grids are overlapped with the closed end of the harpoon part in the first direction, so that current collection is facilitated; in the second direction, a first interval is formed between adjacent sub-segments of the first fine grid, and the first interval is overlapped with the closed end, so that the phenomenon that when the welding strip is welded, the welding strip and the first fine grid form alloy at the position close to the first welding point, and a bulge appears on the solar cell can be avoided, and the risk of hidden cracks is reduced; according to the solar cell piece, the cold solder joint phenomenon caused by the fact that the height of a fish fork part is inconsistent with the height of a main grid after the fish fork part is in lap joint with the fine grid in the welding process and the poor fitting performance of the welding strip and a welding spot is avoided; the cold solder joint proportion of the solar cell piece is reduced by about 0.3% compared with that of a solar cell piece in the prior art; and the subfissure ratio is reduced by about 0.22% compared with that of the solar cell in the prior art.

This invention belongs to the field of metal rope technology, and provides a high-oil-content coated metal rope, its preparation method, and its application. The coated metal rope includes a metal rope and a plastic outer layer coated on the outer surface of the metal rope. The metal rope includes a core wire containing a first lubricating oil and side wires containing a second lubricating oil, with the side wires wound around the outer surface of the core wire. The flash point of the first lubricating oil is 20°C to 30°C higher than the melting temperature of the plastic outer layer; the flash point of the second lubricating oil is more than 50°C higher than the melting temperature of the plastic outer layer. The method of this invention can significantly reduce oil evaporation during the coating process of the plastic outer layer, avoiding bulging, air bubbles, and coating failure. The prepared high-oil-content coated metal rope has good self-lubricating properties, which can significantly reduce internal friction and breakage of the metal rope. It can be applied to the drive mechanism of vehicle sliding doors.

The present invention discloses a precision seeder with integrated film covering function, which comprises a frame, on which a soil collecting mechanism, a film covering mechanism and a sowing mechanism arranged front and back are installed; the soil collecting mechanism is connected to a soil conveying mechanism, and the soil conveying mechanism comprises a main conveying channel and a diverging structure arranged at the rear side of the main conveying channel; the soil collecting mechanism comprises a first augers and a second augers arranged front and back; three groups of sowing mechanisms distributed left and right are installed on the frame; the diverging structure comprises a soil throwing pipeline from the main conveying channel to the front side of each sowing mechanism, and also comprises a soil throwing guide groove from the main conveying channel to the rear side of the sowing mechanism; the number of the soil throwing guide grooves is two, which comprises a main groove passing through two adjacent sowing mechanisms and two bifurcated grooves located at the rear side of the main groove. The present invention can ensure the quality of film covering and sowing.

The application discloses a multiple-reinforced steel-plastic composite pipe for low-pressure drainage and relates to the technical field of steel-plastic pipe fittings.The pipe body is internally lined with a support pipe;the outer side wall of the pipe body is provided with a reinforcing assembly;the middle part of the inner side wall of the pipe body is provided with an inner pipe;and a cavity is arranged between the pipe body and the outer side wall of the inner pipe;the inner side wall of the pipe body is provided with a clamping assembly at both ends;the clamping assembly is connected with a connecting piece;and a sealing ring is arranged between the clamping assembly and the connecting piece.The multiple-reinforced steel-plastic composite pipe for low-pressure drainage effectively improves the overall strength and deformation resistance of the pipe, avoids the separation of the steel and plastic layers, has high structural stability, simultaneously adopts a bidirectional clamping limiting and double-sealing structure, greatly improves the pipeline butt joint precision and sealing reliability, can effectively prevent interface leakage and silt backflow, is suitable for complex low-pressure drainage working conditions, has a longer service life, and can adapt to displacement and settlement.

The invention discloses an oil seal and a shock absorber, and relates to the technical field of oil seal design, the oil seal is used for being arranged on a guider of the shock absorber and between a piston rod and an outer cylinder, and the outer wall of the oil seal is provided with a vent groove communicated with the two end faces of the oil seal. After the oil seal provided by the invention is assembled and before spinning sealing, when the piston rod moves downwards, air in the shock absorber can be exhausted from the vent groove, so that the oil seal is prevented from bulging out when the piston rod moves downwards, subsequent spinning sealing of an outer cylinder is facilitated, and the yield is improved.