122results about How to "Reduce repair and replacement costs" patented technology

The invention discloses a translational energy-absorbing seat for protecting the neck during rear-end collision and belongs to the technical field of automotive passive safety. A seat translational energy-absorbing mechanism is arranged on a slideway of a conventional automobile seat; and the mechanism is arranged under a seat cushion and symmetrically arranged on two sides of the seat. During rear-end collision, the provided translational energy-absorbing mechanism can make the seat and the passenger translate a certain distance backward under the action of a certain constraint force, and reduce relative motion of the trunk and the head of the passenger. Therefore, the neck injury to the automobile passenger during rear-end collision is effectively reduced. Meanwhile, the translational energy-absorbing seat overcomes the defect that the conventional passenger neck protecting seat during rear-end collision has heavy weight, high cost, narrow rear-end collision speed range, and the like, and has better application prospects.

The invention discloses a flexible bionic tail fin with embedded drive joints and multiple motion modes, relates to a tail fin and aims to solve the problems that according to an existing underwater bionic tail fin pushing device, structure is complex, maintenance and replacement costs are high, the motion mode is single, and the bionic effect is far from the natural actual fish swimming effect. The flexible bionic tail fin comprises a flexible bionic skin, an elastic clamping frame, a first piezoelectric fiber composite drive joint and N second piezoelectric fiber composite drive joints. The elastic clamping frame, the first piezoelectric fiber composite drive joint and the N second piezoelectric fiber composite drive joints are embedded in the flexible bionic skin, the first piezoelectric fiber composite drive joint and the N second piezoelectric fiber composite drive joints are detachably connected to the elastic clamping frame respectively, and the first piezoelectric fiber composite drive joint is arranged in the middle of the flexible bionic skin axially and horizontally. The flexible bionic tail fin belongs to the field of fish-simulation underwater pushing devices.

The invention discloses a folding brake pull-rod movable connecting assembly, a folding brake pull-rod and a using method of the folding brake pull-rod, and belongs to the technical field of power equipment operation tools. The brake pull-rod comprises a first insulating rod and a second insulating rod. The movable connecting assembly comprises a metal locking sleeve, a connecting plate, a firstmagnetic connector which is partially inserted and fixed in the first insulating rod, and a second magnetic connector which is partially inserted and fixed in the second insulating rod. One end of theconnecting plate is hinged with the first magnetic connector; the other end of the connecting plate is hinged with the second magnetic connector; when the brake pull rod is in a folding mode, the metal locking sleeve only sleeves the first insulating rod; when the brake pull rod is in an opening mode, the first insulating rod, the connecting plate and the second insulating rod are located on thesame straight line, the connecting end of the first insulating rod and the second insulating rod is sleeved with the metal locking sleeve in a spaced mode, the two ends of the metal locking sleeve arein magnetic connection with the first magnetic connector and the second magnetic connector respectively, and the movable connecting assembly is convenient to install, good in stability and high in safety.

The invention discloses a roll gap adjusting device of a steel plate-levelling machine and relates to the roll gap adjusting device of steel plate interrupted leveling equipment. The roll gap adjusting device of the steel plate-levelling machine is composed of rollers, a clamp sending device, a centering device, a leveling device and a base seat and characterized in that the clamp sending device and the levelling device are installed on the base seat, the centering device is installed between the clamp sending device and the levelling device, and the rollers are installed inside the clamp sending device and the levelling device. The roll gap adjusting device of the steel plate-levelling machine has the advantages of being novel in structure, easy and convenient to process, convenient to use, capable of improving surface quality of the steel plate, reducing loss of a roll, improving service life of the equipment, saving cost of maintaining and changing and the like. The invention belongs to a novel roll gap adjusting device of the steel plate-levelling machine with integrating economy and practicability together.

The invention relates to the improvement of a speed-increasing gearbox of a wind driven generator, which is characterized in that: a gear transmission has 3 to 4 stages, wherein the last stage is a planetary gear transmission; the former stages are all double-circular-arc cylinder herringbone spiral gear transmissions. Compared with the conventional generally-used speed-increasing gearbox which mainly uses the planetary gear transmission, because the low-speed stages (1 to 3 stages) adopt double-circular-arc cylinder herringbone spiral gears with high transmission efficiency and a subsequent stage adopts the planetary gear transmission, the advantages of the double-circular-arc cylinder herringbone spiral gear transmission and the planetary gear transmission are combined together, thus the effective one-off life is long, the transmission efficiency is high and the volume is small; and moreover, the double-circular-arc cylinder herringbone spiral gear is used for the speed-increasing gearbox of the wind driven generator for the first time.

The invention provides a partial filling type double-sleeve buckling-preventing support. The core-replaceable partial filling type double-sleeve buckling-preventing support can consume a large amount of earthquake input energy, reduces the damage to the structure under rare occurrence earthquakes, connects energy consuming cores and a node elastic region through a detachable bolted connection method, can also achieve post-earthquake replacement of the energy consuming core, reuses a restraint unit, and lowers repairing and replacement cost. The core-replaceable partial filling type double-sleeve buckling-preventing support at least comprises (1) the linear type energy consuming cores, (2) an internal steel sleeve restraining the linear type energy consuming core from partially buckling, (3) an external steel sleeve guaranteeing the overall stability of the support, (4) concrete filler between the internal steel sleeve and the external steel sleeve, (5) supporting node stiffening plates, (6) bolt connecting plates and bolts between the energy consuming cores and the supporting node stiffening plates, and (7) steel channel stiffening ribs. The core-replaceable partial filling type double-sleeve buckling-preventing support is convenient to support and is designed flexibly, the internal steel sleeve mainly prevents the linear type energy consuming cores from partial buckling and damage, the outer steel sleeve and the concrete filler mainly prevent the entire support from buckling failure, and the function of the internal steel sleeve and the function of the external steel sleeve are relatively independent. The core-replaceable partial filling type double-sleeve buckling-preventing support has the advantages of being low in machining cost, light in self-weight, good in economic benefit, convenient to construct and the like.

The invention discloses a double-layer vertical conveyor, a double-layer sorting system and a sorting method thereof. The double-layer vertical conveyor comprises a first annular rail and a second annular rail which are consistent in shape and area, wherein axes of the first rail and the second rail are parallel to a horizontal plane, and the axes of the first rail and the second rail are equallyin height and are arranged at an interval; at least one loading device is arranged on each of the first rail and the second rail and can move along the first rail and the second rail, and the upper surface of the loading device is kept in an upward state during moving. According to the abovementioned scheme, the double-layer vertical conveyor has the advantages that two rails which are not coaxialto each other are adopted; single-point connection and the position of a connection point of the loading device and a moving part in the rails are designed, so that the surface of the loading deviceis kept in an upward state all the time, and an object on the loading device cannot fall off in the whole moving process; a turning area and the loading device in a lower layer rail area can be fullyutilized to realize sorting, so that the sorting efficiency is improved; and meanwhile, the arrangement flexibility of a feeding line, a sorting port and other equipment can be improved.

The invention discloses a rainwater remover for an automobile windshield. The rainwater remover for the automobile windshield comprises a detachable remover body which is installed on the automobile windshield or on glass on the two sides. The remover body comprises a fixing device, a power driving device and a removing device. The fixing device comprises a sealing suction cup. An adsorption cavity is formed in the sealing suction cup. The interior of the sealing suction cup is embedded in a protective shell. The sealing suction cup is provided with a protruding edge part. An air hole is formed in the position, right facing a vacuum cavity, outside the sealing suction cup. A sealing plug is arranged in the air hole for sealing the air hole. The air hole is used for being connected with an external vacuumizing device and used for pumping out air in the adsorption cavity. External threads are arranged and assembled on the outer side of the protective shell. By installing the rainwater remover on any glass surface of an automobile window, rainwater on the glass surface can be removed rapidly so that a driver can drive an automobile without obstacles, the problem of interruption appearing when a windscreen wiper swings is solved, and the rainwater remover can be dismounted and mounted in use.

A reel product slitting machine tool holder which is in an inner circular ring shape sleeves on a pad roller which is arranged under a slitting tool of a winding unit; a protruding inner circular ring is machined in one lateral side of the tool holder; an annular blade sleeves the inner circular ring; a clamping groove is machined in the inner circular ring which is closely adhered to the outer side of the annular blade; a clamping ring is installed inside the clamping groove. According to the technical scheme, when the annular blade is abraded, only the annular blade is replaced, the integral slitting tool holder is not required to be replaced, and accordingly the maintenance and replacement costs of the annular blade are greatly reduced and the annular blade can be produced by high rigidity materials, the machining difficulty is low and the manufacturing costs are small compared with that rigidity processing is performed in the lateral side of the integral slitting tool holder, the blade can be turned over by one surface for continuous utilization when one side of the annular blade is abraded, and the service life of the annular blade is greatly increased.

The invention relates to a power cable sealed transmission mechanism for a low-temperature submersed pump. The power cable sealed transmission mechanism comprises a hollow cylindrical first insulated sleeve with one end opened and the other end sealed, a hollow cylindrical second insulated sleeve with two ends opened and a copper conductor passing through the sealed end of the first insulated sleeve and in fixed and sealed connection with the sealed end, wherein the first insulated sleeve is used for being in fixed and sealed connection with the motor end cover of the low-temperature submersed pump, and in the case of connection, the opened end of the first insulated sleeve passes through the motor end cover to the inner part of the low-temperature submersed pump; one end of the second insulated sleeve and the sealed end of the first insulated sleeve are in fixed and sealed connection, and the other end passes to the outer part of the low-temperature submersed pump; the first end of the copper conductor is located in the first insulated sleeve for being connected with a wire of the motor; and the second end of the copper conductor is located inside the second insulated sleeve for being connected with an external low-temperature power cable. The problem that the power cable sealed transmission mechanism matched with the low-temperature submersed pump is lacked in the country is solved.

The invention relates to a solar type weight measurement well lid. The solar type weight measurement well lid comprises a well lid cover, a protection shell, a strain sensor, a storage, a processor, a storage battery and a solar cell panel. The two ends of the strain sensor are fixed to the lower surface of the well lid body. The protection shell is arranged on the lower surface of the well lid cover. The storage, the processor and the storage battery are arranged in the protection shell. The processor is electrically connected with the strain sensor, the storage and the storage battery. The solar cell panel is electrically connected with the storage battery. A groove is formed in the upper surface of the well lid cover. The solar cell panel is arranged in the groove. A step is arranged on the upper edge of the groove. A transparent baffle is arranged on the step and is flush with the upper surface of the well lid cover. The solar type weight measurement well lid has the advantages that the maintenance and replacement cost is reduced for manufacturers, adverse effects caused by mistaking problems as quality problems are reduced, and due to the adoption of a solar cell, more energy is saved and environment protection is achieved.

The invention discloses an air cylinder detachable type shield which is in a cylinder shape. The end surface of the shield is provided with an air cylinder piston rod installation hole and a shield installation fastening hole, and the cylindrical surface of the shield is provided with a joint installation hole; and the size of the shield and the position of the joint installation hole are designedand manufactured according to the size of the air cylinder. The shield can be welded under the condition of complicated and narrow spaces of two air cylinders, prevents the quality problem that the welding strength does not conform to a process, saves the maintenance exchange cost of the air cylinders, improves the availability of process equipment and can effectively improve the welding strengthof a welding vehicle body and prolong the service life of the air cylinders.

The invention discloses cleaning equipment for a tire mold. The cleaning equipment comprises an X1,Y1 platform, a whole machine bracket, a vertical adjustment of a Z-axis processing head, a C-axis processing head rotation, an X-axis processing head horizontal adjustment, a D-axis focusing mechanism, a B-axis laser tube rotation, an A-axis light beam exit adjustment, an optical path system, a dustremoval system, a gas path system, a control system, a cooling system and the like. The cleaning equipment is used for removing all or part of residue deposited on the molds due to the tire manufacturing process (vulcanization) in various types of tire molds. The cleaning equipment can further be used for cleaning rust, greasy dirt and paint.

The invention relates to a water collection and distribution device in an oil field produced water treatment sedimentation tank, in particular to a non-metal water collection and distribution device in the oil field produced water treatment sedimentation tank. The device comprises a sedimentation tank body, a central cylinder body, a central pipe, a low water inlet horizontal pipe, a water inlet vertical pipe, a water distribution chamber, a water collection device, a water distribution device, a high water outlet horizontal pipe, a water distribution box and a sedimentation tank outer water outlet vertical pipe, wherein the lower end of the central cylinder is fixedly arranged at the bottom of the sedimentation tank body; the upper end of the central cylinder is fixed with the lower end of the central pipe through a flange; the water distribution chamber is fixedly arranged on the lower part of the central pipe; an air pipe is fixedly arranged on the water distribution chamber; the water distribution box is fixedly arranged on the upper part of the outer side of the sedimentation tank body; and the central pipe is communicated with the water distribution box through the high water outlet horizontal pipe. The non-metal water collection and distribution device in the oil field produced water treatment sedimentation tank has a reasonable and compact structure, is convenient to use and can effectively prolong the service life of a water collection pipe and a water distribution pipe so as to reduce the using cost and the maintenance and replacement cost of the water collectionpipe and the water distribution pipe.

The invention discloses an easy-to-replace waterproof device applicable to an existing railway bridge expansion joint. The waterproof device comprises anchoring ribs fixed in beam-end concrete on twosides and is characterized in that anchoring profile steel is fixed to the ends of the anchoring ribs, the lateral wall of each of the two profile steel is provided with a mounting groove, a clamp plate nut is mounted in each mounting groove in a clamped manner, a waterproof rubber belt and a pressing plate are sequentially fixed to each clamp plate nut through an anchoring bolt, each anchoring bolt penetrates the lateral walls on two sides of the corresponding pressing plate and waterproof rubber belt to be connected with the corresponding clamp plate nut, and the waterproof rubber belts aremounted between the two anchoring profile steel. The easy-to-replace waterproof device has the advantages that the waterproof rubber belts of the existing railway bridge ballastless track expansion joint can be conveniently and efficiently maintained and replaced, the replaced waterproof rubber belts are high in expansion deformation adaptability, good in waterproof performance, incapable of falling off, the service life of a bridge expansion device is prolonged, the maintenance and replacement cost of the existing expansion joint is lowered, and the service life of the beam-end expansion joint is further prolonged.

The invention discloses a metering box convenient for heat dissipation, which comprises a shell. Mounting blocks are fixedly connected to the bottoms of the left side and the right side of the shell,fans are fixedly connected to the tops of the mounting blocks, air inlet pipes are fixedly connected to the tops of the fans, air outlet pipes are fixedly connected to the sides, close to the shell, of the fans, and the sides, away from the fans, of the air outlet pipes penetrate through the shell and extend into the shell to be sleeved with sleeves. Through mutual cooperation of the fan, the airinlet pipe, the air outlet pipe, the sleeve, a hose, an exhaust head, a balancing weight, a sliding rod, a sliding block, a through hole, a rolling pulley, a rotating motor, a rotating shaft, a forward rotating threaded rod, an annular block, a reverse rotating threaded rod, a threaded block, a fixing block, a sliding groove, a sliding block and a fixing rope, the effect of convenient heat dissipation is achieved, the problem that the metering box is inconvenient to dissipate heat is solved, local melting of a wire cannot be caused in a high-temperature environment, the service life of internal elements of the metering box is prolonged, and great convenience is brought to a user.

The invention discloses a waterproof device suitable for an expansion joint of a railway bridge of existing railway lines, and relates to the field of bridge expansion devices. The waterproof device comprises anchoring steel bars, anchoring profiles and a waterproof rubber band. The anchoring profiles are symmetrically arranged on the end parts of adjacent bridge bodies and are fixedly connected with the anchoring steel bars. The waterproof rubber band is connected between the symmetrically arranged anchoring profiles, and a mould cavity is formed in each anchoring profile. The opening of eachmould cavity is in a C shape, and each mould cavity is internally provided with a pressing block and a pressing plate; the waterproof rubber band comprises two connecting lug straps on the outer sides and an expansion body arranged between the two connecting lug straps, and the connecting lug straps are fixed in the mould cavities through the pressing blocks and the pressing plates to form a sealing structure with the anchor profiles. The waterproof rubber band of the waterproof device has high adaptability in stretching and deformation, good water stopping performance and high clamping force, and is not prone to falling off and convenient to maintain and replace. Thus, the service life of the bridge expansion joint is prolonged, the maintenance and replacement cost of an existing expansion joint is reduced, and the service life of beam end expansion joints is prolonged.

The invention discloses a heat exchanger for waste heat recovery of a coal-fired boiler. The design concept combining a section-separated heat transfer enhancement principle and a technology for flexibly adjusting the tube wall temperature through graded water supply is adopted, the heat exchanger is divided into a high-temperature section adopting carbon steel and a low-temperature section adopting ND steel, tube bundles are staggered, media inside and outside tubes are in a counter-flow type, the tube wall temperature of the high-temperature section and the low-temperature section is adjusted precisely in a graded water supply manner, so that the tube wall temperature is higher than the acid dew point temperature of flue gas throughout, and a low-temperature corrosion relieving effect is realized. The technical problems of low heat transfer temperature pressure and serious low-temperature acid-dew-point corrosion in low-temperature flue gas waste heat recovery of the coal-fired boiler are solved very well, by means of combination of section-separated heat transfer enhancement and flexible adjustment of the tube wall temperature through graded water supply, the heat exchange performance and the anti-corrosion effect of the low-temperature heat exchanger are improved obviously, the efficiency and the economical efficiency of the low-temperature flue gas waste heat recovery of the coal-fired boiler are improved substantially, and the heat exchanger has good social and economic benefit and great industrial application and popularization potential.

The invention discloses a real-time propeller blade angle monitoring device. The real-time propeller blade angle monitoring device comprises two groups of pushing devices, two groups of sensor devices, an intermediate disc, a processor and a display screen, wherein each group of pushing devices comprises a cam, an ejector rod I and a support I; each group of sensor devices comprises an ejector rod II, a support II and a displacement sensor; the two cams are respectively fixed on blade roots of two symmetric propeller blades; the ejector rod I are connected with the support I in a telescopic manner; one ends of the ejector rod I are pushed against outer circles of the cams; the supports I are fixed on propeller hubs; the intermediate disc sleeves a propeller shaft; the other end of each ejector rod I is fixed at the outer edge of the intermediate disc; the supports II and the displacement sensors are fixed in the same position of an engine shell; the ejector rods II are connected with the supports II in a telescopic manner; one ends of the ejector rods II are connected with contacts of the displacement sensors; and the other ends of the ejector rods II are pushed against the outer edge of the intermediate disc. The real-time propeller blade angle monitoring device can measure the angle of a propeller blade at any time and feed back the angle of the propeller blade in time, has the advantages of simple and reliable structure, convenient mounting and detaching and accurate propeller blade angle measurement, and can realize on-site maintenance and replacement.

The invention provides a cutting device for engineering construction, and relates to the field of construction instruments. The cutting device for engineering construction comprises a base, a top plate is welded to the top of the base through two supporting rods, inner rods are welded to the side, away from the supporting rods, of the bottom of the top plate, the bottoms of the inner rods are sleeved with outer rods, and a cutting blade is arranged between the two outer rods. According to the cutting device for engineering construction, a worker controls lifting of the cutting blade through agrab mechanism, and a damping spring is arranged around the outer surface of a holding rod. Vibration produced during working of the cutting device is transferred to an outer barrel through a motor box and a transverse rod, the damping spring carried out buffer and energy consumption on the vibration, the strength of the vibration transferred to the holding rod is reduced, meanwhile, the outer surface of the holding rod is sleeved with a rubber sleeve, the strength of cutting vibration transferred to the hands of the worker is greatly reduced, harm of cutting vibration to the body of the worker is avoided, the work fatigue feeling can be reduced, and the working efficiency can be improved.

The invention discloses a speed measuring device of a tilting frame type compressor. The speed measuring device is installed on the compressor which is provided with a pump body, a piston, a main shaft and a tilting frame which is fixedly arranged on the main shaft. The starting end of the piston is provided with a ball socket. The speed measuring device comprises a half ball arranged inside the ball socket and a speed measuring component located on the pump body, the speed measuring component is arranged corresponding to the starting end of the piston, and the output end of the speed measuring component is electrically connected with a controller. Due to the fact that the pump body is provided with the speed measuring component, the piston does vertical reciprocating movement one time when the main shaft drives the tilting frame to rotate by one circle, and the half ball moves to the highest point from the lowest point and then to the lowest point. The speed measuring component determines the rotating speed of the main shaft by detecting the position of the half ball, the rotating speed of a main shaft tilting frame system is effectively detected, a rotating speed signal is compared with a set signal so that the rotating speed can be adjusted in time, the equipment failure is avoided, the compressor can run normally, the using, maintaining and replacing cost is reduced, tapping, magnet press-fitting and other working procedures are not needed to be carried out on the tilting frame, the assembling working procedure is simple, and treatment can be carried out conveniently.

The invention provides an efficient corrosion inhibitor for resisting carbon dioxide corrosion and a preparation method thereof, and relates to the field of chemical agents for tertiary oil recovery. According to the efficient corrosion inhibitor for resisting the carbon dioxide corrosion and the preparation method thereof, the synthesis of a novel imidazoline amide salt is taken as a starting point, and on the basis, the novel imidazoline amide salt is compounded with other environment-friendly water treatment agents to form an efficient corrosion inhibition system. The synthesis method of the imidazoline amide salt corrosion inhibitor comprises the following two steps: step 1, uniformly mixing lauric acid and diethylenetriamine according to a certain molar ratio, adding a water carrying agent xylene, carrying out high-temperature dehydration and cyclization reactions under condensation and nitrogen introduction conditions to obtain triimidazoline; and step 2, adding a proper amount of benzoic acid into the obtained triimidazoline, and carrying out high-temperature dehydration amidation reaction to obtain the imidazoline amide salt. The corrosion inhibition rate of various high-temperature and high-pressure oil well pipelines can be greatly improved, so as to achieve the purpose of improving quality and efficiency.

The invention provides a battery protection device. The battery protection device comprises a shell with an inner containing space, a positioning structure, and a through hole, the positioning structure is arranged at the inner part of the containing space and used for locating the battery from two ends of the battery, an interval space is reserved between the middle part of the battery and a base plate of the shell, and the through hole is arranged on the base plate and communicated with the containing space. According to the battery protection device, the battery is located from two ends by the positioning structure, electrolyte flowing from the inner part of the battery flows outwardly via the through hole arranged on the base plate, in this way, after the explosion of the battery, if there is a little residual electrolyte, even though the shell is not cleaned, the battery erected by the positioning structure is not contacted with the electrolyte when the battery of the next batch is arranged in the shell for the test, and the risk of short circuit of the battery is not increased; when there is less chemicals such as the residual electrolyte in the shell, the cleaning of the shell can be prevented, and the cleaning workload is small.

The invention discloses a computer automatic metering device for weighing steel. The computer automatic metering device comprises a weighing chamber, an air inducing channel is arranged at one side ofthe weighing chamber, a purifying chamber is arranged at the other side of the weighing chamber, an induced draft fan is arranged at the side, away from the weighing chamber, of the air inducing channel, an activated carbon adsorption layer is arranged in the middle inside the purifying chamber, a fan is arranged above the activated carbon adsorption chamber, and cooling fans are symmetrically arranged at the upper side and the lower side inside the weighing chamber respectively. Parts of the computer automatic metering device are unifiedly put in the weighing chamber, the device is protectedto a certain extent, dust in the environment is prevented from entering the device, the device is not damaged, and air inside the weighing chamber is purified through the air inducing channel, the induced air draft fan and the activated carbon adsorption chamber; meanwhile, the cooling fans are designed, working heat generated by the device is dissipated, a good working environment of the deviceis guaranteed, the service life of the device is prolonged, and the repair and replacement cost of an enterprise is saved.

The invention relates to a dynamic fault tree analysis method with a failure-related mode system, comprising steps: Step 1: defining a failure-related mode; Step 2: defining a failure-related gate corresponding to the failure-related mode; Step 3: pairing the failure through a Markov chain Solve the failure-related gates; step 4: establish the dynamic fault tree model of the system through the failure-related gates; step 5: solve the dynamic fault tree model of the system to obtain the system reliability. The beneficial effect of the present invention is that: in the present invention, through the reliability analysis and calculation of the failure-related modes, the reliability of the failure-related modes can be quantitatively calculated, so that the reliability of the system can be accurately obtained, and the reliability of the system can be ensured. Under the premise, the maintenance and replacement cost of components can be effectively reduced.

The invention discloses a steering elbow for powder-shaped material transportation, comprising an elbow main body, wherein the elbow main body is a closed shell (1); an input pipe (2) and an output pipe (3) are fixed on the shell (1); the input pipe (2) and the output pipe (3) are fixed with the shell (1) and are communicated with the inner cavity of the shell (1); the inlet end of the output pipe (3) is input deep in the inner cavity of the shell (1); a distance D9 that the inlet end is input deep in the shell (1) is 4cm; the shell (1) comprises an upper circular board (4), a lower circular board (5) and a barrel body (6); the upper circular board (4) and the lower circular board (5) are fixed on the upper end and the lower end of the barrel body (6) respectively; the input pipe (2) and the output pipe (3) are fixed on the circumferential face of the barrel body (6); and the inner diameter D1 of the barrel body (6) is as 2-3 times as the inner diameter D6 of the input pipe (2). According to the invention, the steering elbow is characterized by abrasion resistance, simple structure and low cost.

The invention provides a long-stroke heavy drag chain operating device. The long-stroke heavy drag chain operating device comprises a guide rail and a supporting roller bracket. The supporting rollerbracket is arranged between an upper drag chain segment and a lower drag chain segment and is provided with first supporting rollers matched with the guide rail and second supporting rollers suitablefor supporting the upper drag chain segment. As the upper drag chain segment is in rolling connection to the second supporting rollers, compared with the prior art, the friction force between the supporting roller bracket and the upper drag chain segment is reduced, so that on the one hand, the supporting roller bracket is unlikely to deform, conditions that a drag chain is derailed and a drag chain body is damaged are prevented effectively, the service life is prolonged and the maintenance and replacement costs are lowered, and on the other hand, the driving force for drag chain operation isreduced.

The invention discloses a device for monitoring a paddle angle of a working propeller. A cylinder body of a hydraulic cylinder is fixed on one end wall, without the paddle, of a paddle shell, one end of a stirring sleeve is fixedly connected with an eccentric pin fixedly arranged on each paddle through a bearing, the other end of the stirring sleeve is fixed on a piston; a beta tube is arranged in central holes of a paddle shaft, the paddle shell and the stirring sleeve in a penetrating mode, one end of the beta tube is fixed on the piston, the other end of the beta tube extends into a displacement sensor, two oil transporting cavities which are a central oil cavity and an on-wall oil cavity surrounding the central oil cavity are formed in the beta tube; the central oil cavity is communicated with an oil cavity I of the hydraulic cylinder, the on-wall oil cavity is communicated with an oil cavity II of the hydraulic cylinder; the displacement sensor is fixed on an engine shell; a signal output end of the displacement sensor is connected with a signal input end of a processor, a signal output end of the processor is connected with a display screen. The device disclosed by the invention can be used for momentarily measuring and timely feeding back the paddle angle, is simple and reliable in structure, convenient to mount and dismount, precise in paddle angle measuring and capable of realizing field maintenance and replacement.

The invention discloses an optics lens with an anti-counterfeiting layer. The optics lens comprises a substrate, wherein one side of the top end of the substrate is adhered to an anti-aging layer; thesurface of the top end of the anti-aging layer is provided with a protection layer; an anti-counterfeiting layer is adhered between the anti-aging layer and the protection layer; and the anti-counterfeiting layer consists of an invisible pattern layer, an anti-reflection film layer and a thermosensitive induction film, wherein the surface of the bottom end of the thermosensitive induction film isfixedly connected with the anti-aging layer through an adhesion layer. By use of the optics lens, through the anti-aging layer, the corrosion resistance of the substrate is improved, and the device is guaranteed to be stably used. In addition, an anti-counterfeiting pattern layer generates different patterns to perform an anti-counterfeiting function. When the thermosensitive induction film feelsa heat source, color change powder which covers the thermosensitive induction film can present the invisible pattern layer, so that a user can conveniently distinguish whether the lens is true or false, losses brought when the user purchases forged and fake commodities can be reduced, and therefore, the optics lens has the advantages of being simple in operation and convenient in use and is suitable for any optical instrument.