113 results about "Chain fall" patented technology

Method and apparatus for making snow by generating water spray from a triple array of multiple nozzle sub-boom branch-pipes transversely protruding from the upper end of a main boom of a pivotably adjustable snow making pipe tower. Three air jet streams, one for each branch pipe, are simultaneously discharged under high pressure into and sequentially through the throats of each associated multiple stack of water sprays issuing from each set of branch pipe nozzles to thereby form multiple spray plumes of atomized and seeded water all directed forwardly from the upper end of the tower pipe. The water pipe may be an elliptical aluminum extrusion with two interior air tubes respectively controllably feeding large and small diameter air jet arrays to thereby provide a range of air jet water spray interaction. The pipe tower may be pivotally raised and lowered by a block-and-tackle or chain fall type drive mechanism that may be recoupled to the tops of a lifting pole and tower pipe for bodily raising the entire tower pipe and its support pipe telescopically on a ground support pole. Spreader-supported guy wires may be used to brace the tower pipe and also provide an electrical deicing circuit. Air jet control, blow-out valving and water drain conduit arrangements are disclosed, and also universally adjustable ground support systems for the pipe tower, including an underground-fed combined telescopic hydraulic ram forming air and water conduits.

A solid state thermal engine has two drums, each drum having two pulleys positioned thereon. Each pulley on the one drum is coupled to its counterpart pulley on the other drum via a belt, chain or other connector. One of the belts, referred to as the active belt, is heated which causes the active belt to expand. The expansion decreases the tension on the active belt, and further causes the active belt and the pulleys on which it is positioned to rotate. In a preferred embodiment, the active belt is manufactured out of a memory metal such as NITINOL. In another embodiment, a system of several drums and pulleys are used to implement a chain fall device.

The invention relates to a Pb<2+> detection chip based on deoxyribonuclease as well as making and application methods. The invention is characterized in that a 17DS substrate chain of a 17E enzyme chain of deoxyribonuclease 8-17 with strong specificity response is cut off, so that part or all of the cut-off 17DS substrate chain falls off. Since the 17DS substrate chain is previously labeled by fluorescence, the cut-off operation weakens the fluorescence signal. The application method is characterized by comprising the following steps: when the lead ion detection chip is used for lead ion detection, putting the sample to be detected on the chip, holding for a period of time, scanning the chip by using a chip signal analysis system, and analyzing the fluorescence signal. The Pb<2+> is detected through the variation of the fluorescence signal; and the fluorescence signal gets weakened as the concentration of Pb<2+> in the sample gets higher. The detection range of the concentration of Pb<2+> is 1nM-10mu M.

A self-vibration type continuous casting system comprises a casting machine, a flow dividing device, a molten pool and a self-vibration device. One end of the flow dividing device is connected with the molten pool, and the other end of the flow dividing device is connected with the casting machine; the casting machine comprises a supporting frame, a machine head, a machine tail and a casting portion, wherein the machine head, the machine tail and the casting portion are fixed on the supporting frame; the casting portion comprises a transmission chain; one end of the flow dividing device is connected with the molten pool, and the other end of the flow dividing device is connected with the casting portion; and the self-vibration device is installed below the up transmission chain of the casting portion, and the up transmission chain is vibrated and struck through vibration of the self-vibration device, so that ingot metal in a casting mould of the up transmission chain falls off. According to the self-vibration type continuous casting system, the self-vibration device is installed below the up transmission chain and makes contact with the back surface of the casting mould, and the self-vibration device vibrates and strikes the back surface of the casting mould through self-vibration, so that the ingot metal and the casting mould become loose, and the ingot metal falls off automatically.

The invention discloses a webpage screenshot method and device. The method comprises: receiving a webpage screenshot command, wherein the webpage screenshot command comprises a URL address of a webpage; loading the webpage by utilizing the URL address; and carrying out screenshot on the webpage. According to the invention, the waiting time of related personnel can be saved, the safety problem caused by chain falling is prevented, the related personnel can visually see the data report, and the manpower is saved.

The invention relates to the field of exhaust or separation devices of gas or smoke dusts in converters for processing and treating pig irons and discloses a fast change method of a large-scale converter movable gas hood. After a fixed gas hood is disassembled, the method sequentially comprises the following steps of: firstly, disassembling a cooling water pipe and rocking a converter (1) until the furnace bottom is arranged upwards; secondly, fixing a movable gas hood (2) on the converter (1) through a chain fall (4); thirdly, hoisting the movable gas hood (2) down through a crane (3); fourthly, hoisting a new movable gas hood onto the furnace bottom of the converter (1) through the crane (3) and fixing the new movable gas hood through the chain fall (4); fifthly, rocking the converter (1) until the furnace bottom is arranged upwards; and sixthly, reassembling a lifting chain of a hoisting device of the movable gas hood (2) and removing the chain fall (4). The invention has the advantages of simple steps, convenient operation, short construction period, less influence to production and high production efficiency.

The invention relates to an automatic monitoring comprehensive protection device of a scraper conveyor, in particular to a chain breaking, dislocation and chain falling comprehensive protection device of a scraper conveyor, which is applied to the field of coal mine machinery. Parallel chains are arranged on both sides of the scraper conveyor placed in parallel; scraping plates are uniformly and vertically arranged on each chain along the length direction of the chain; the chains are operated to a tail pulley from a head pulley of the scraper conveyor; a first proximity switch and a second proximity switch are arranged above the scraping plates; the first proximity switch and the second proximity switch are respectively connected with a monitoring device in parallel through signal wires in a heat shrinkage pipe. The comprehensive protection device disclosed by the invention has the advantages of high automation degree, little influence to the scraper conveyor and relatively wide application range and is simple and reliable.

The invention relates to a steel truss girder linear control method of the bridge upper structure construction field and provides a three-truss steel truss girder linear control method. The control method comprises vertical control and plane linear control. The vertical control comprises A1. a main truss rod component between two adjacent steel truss girders and other rod components are assembled, the diameter of a punching nail is 0.3-0.5mm less than theoretical aperture; A2. the altitude difference caused by the uneven settlement of a temporary bearing is adjusted in advance by adjusting a pivot of next segment; the altitude difference caused by uneven load is adjusted by applying external force by the punching nail through the clearance of the aperture; the plane linear control adjusts and positions the midline of a middle truss according to the design line shape by a chain fall; and the midline of two lateral trusses is adjusted within the range of standard requirement with the midline of the middle truss as a reference line by adjustable profile steel. During the spanning process, the invention can control and adjust the altitude, the altitude difference and the plane line shape of three trusses effectively in time and ensures that the integral line shape and truss width of three trusses meet the requirement, thereby ensuring that three trusses are jointed successfully.

A children's bicycle with a bevel gear driving device that includes a pedal intermediate axle, characterized in that the pedal intermediate axle is connected with a drive bevel gear, which drives a connecting rod having bevel gears on both ends thereof, that the bevel gear on the other end of the connecting rod drives the rear wheel bevel gear, and that protecting hoods are provided over the driving bevel gear, the connecting rod with bevel gears, and the rear wheel bevel gear. The driving device avoids the problem of chain falling-off and allows safer use.

The invention relates to the field of scraper conveyer detection and discloses a scraper conveyer detecting device and method. The normal component of a magnetic signal in a stress concentration area of a scraper is acquired through magnetic sensors, whether the scraper of a scraper conveyer is to be broken or has been broken is judged according to the intensity of a gradient signal of the normal component, the distances between distance measuring sensors and the scraper are measured through the distance measuring sensors, and whether chain falling or chain breaking occurs to the scraper is judged according to the distances. By the adoption of the scraper conveyer detecting device and method, maintenance staff can be informed in time for maintenance when the scraper is broken or to be broken or chain falling or chain breaking occurs to the scraper, and then accidents such as coal leakage and coal piling are prevented.

The invention provides an integrated monitoring device for the conveying chain of a coal sorting machine, and belongs to a conveying chain monitoring device. The upper monitor computer of the monitoring device monitors the performance of the main processing unit, the main processing unit receives and handles signals sent by the detecting unit, and controls a shutdown circuit and an alarm circuit; the speed detection unit detects the running speed and the direction of the conveying chain, the fault detection unit detects the faults of the two conveying chains, such as chain scission, chain falling, chain skipping, scraper plate dislocation and the like; the alarm circuit and the shutdown circuit conduct sound-light alarm and stop dragging motor order sent by the main controlling unit; the main controlling unit conducts self-locking after fault signal processing, and the reset of the main controlling unit is conducted by the reset circuit. According to the device provided by the invention, the running parameter of the conveying chain is detected in real time, and the conveying chain fault can be detected timely to stop dragging motor, the damage to the scraper plate and the fluidizer caused by continuous running of the motor after chain scission, chain falling is avoided effectively, and the staff allocation of the system operation and the workload maintenance are decreased.

The invention relates to an electric chain saw with linked-lever latched damping handles for grip change of both hands. Chain falling prevention and hand changing operation are long-standing problems, and an innovation is made at present. According to the electric chain saw, the operation is facilitated during work, and a switch can be controlled to work by only gripping a left linked lever handle (51) and a right linked lever handle (52) by the both hands, or changing to use a left hand to grip the left linked lever handle (51), or changing to use a right hand to grip the right linked lever handle (52), or carrying out latching by using a latching turn handle (55), so that the electric chain saw with the linked-lever latched damping handles for the grip change of the both hands is formed, and manufacturing is facilitated.

The invention discloses a method for making pile foundation construction follow long steel pile casing construction in a karst area. The method comprises the following steps of: drawing a pattern of a steel pipe bracket for supporting a steel pile casing by using graphics software; welding section steel and a steel pipe according to drawing paper to form a bracket for supporting the steel pile casing; during field application, treating a bracket foundation; putting the bracket at an orifice; making the steel pile casing follow segmentally by using a chain fall; and in the falling process of the steel pile casing, checking whether the verticality and the like are consistent with the specification and design requirements. The method has the characteristics of rapidness and safety when applied to pile foundation construction in the karst area; and moreover, the steel pipe bracket used during construction can be used repeatedly, the construction process is shortened, and the construction cost is saved.

The invention discloses a method for detecting broken chains of a swaying rack. A swaying rack is provided with a plurality of chains, wherein the chains are connected with a drive motor; the drive motor is connected with one PLC (Programmable Logic Controller); the PLC controls the drive motor to drive the chains to move back and forth; a steel wire rope is arranged below the chains; one end of the steel wire rope is fixed, and the other end of the steel wire rope is connected with a steel plate capable of sliding up and down via one steering wheel; one side of the steel plate is provided with a proximity limit sensor corresponding to the steel plate; and the proximity limit sensor is connected with the PLC controller. According to the device, maintenance staff can be reminded of overhauling chains on the swaying rack in time so as to avoid the problems of pulling deformation, falling and destroy of a chain track in a broken chain, thereby effectively shortening chain overhauling time, saving manpower and materials, lowering production cost, improving overhauling efficiency and ensuring normal production.

A tensioning sprocket and a broken chain detection device, including a base, a sleeve device, a spring, a tensioning sprocket, a sprocket frame, a tensioning sprocket adjustment device, and a limit switch; the sleeve device includes a sleeve base and a sleeve The sleeve, the base of the sleeve is connected with the base; the spring is installed inside the sleeve; the tensioning sprocket is installed on the sprocket frame, the left end of the sprocket frame is provided with a sliding shaft, the sliding shaft is inserted into the right end of the sleeve, and the spring at the left end of the sliding shaft The right pressure plate is connected with the right end of the spring; the tensioning sprocket adjustment device includes a sprocket adjustment bolt, a screw plug, and a spring left pressure plate. The left end of the spring is connected; the limit switch is installed at the right end of the base; the front end of the sprocket frame is provided with a limit switch strike plate. The device of the invention can not only realize the function of chain rotation and tensioning the sprocket, but also can detect whether the transmission chain is detached or broken, thereby improving the safety and reliability of the chain transmission.

The invention relates to chain transmission and provides a forward-reverse-rotation transmission chain tensioning device in order to solve the problem that existing chain transmission is prone to generating tooth jumping and chain falling. The forward-reverse-rotation transmission chain tensioning device comprises a driving sprocket and driven sprockets which are rotatably connected through chains in the same direction and is characterized in that the forward-reverse-rotation transmission chain tensioning device further comprises upper tensioning sliding seats, lower tensioning sliding seats and two-way acting hydraulic oil cylinders; the two-way acting hydraulic oil cylinders push the upper tensioning sliding seats and the lower tensioning sliding seats to move in the perpendicular direction of the upper edges of the perpendicular chains, so that the upper tensioning sliding seats downwards compress the upper edges of the chains or the lower tensioning sliding seats upwards compress the lower edges of the chains; and the two-way acting hydraulic oil cylinders are connected with a chain tensioning control system. Engaged wrap angles of the chains and the driving sprocket are increased, the contact areas of the sprockets abraded after the long-term use and the chains are increased, when the chains are in forward-rotation transmission or reverse-rotation transmission, the phenomena such as shaking, skidding, floating, tooth jumping and chain falling of the transmission chains are overcome, the reliability of chain transmission is greatly improved, and the life of the chains is prolonged.

The invention relates to a transmission shaft type tricycle comprising a rotary handle, a front fork shaft, a front fork frame which are sequentially connected, wherein the bottom end of the front fork frame is provided with a front wheel; the upper end of the front fork frame is connected with the rotary handle and a conical power input bevel gear through a rotary handle shaft; the conical power input bevel gear is sequentially connected with a conical power output bevel gear, a flexible transmission shaft which transmits vertically, a conical redirecting active bevel gear, a redirecting passive bevel gear, a horizontal transmission shaft, a conical axle active bevel gear and a conical axle passive bevel gear for rotation; the conical axle passive bevel gear is fixed between two rear wheels of the tricycle through horizontal axles; and a tricycle frame is positioned on the conical axle passive bevel gear. The transmission shaft type tricycle is free to advance or retreat when in use, is convenient to use, solves the problem of easy chain falling and has great popularization value.

The invention discloses a variable-speed bicycle capable of identifying unusual conditions and an identifying method of the bicycle. The bicycle comprises a transmission on the bicycle, a power supply module, a microcomputer, a gear check table which is stored inside the microcomputer, a gear shifting control driver, a vehicle speed sensor, a treading speed sensor and an alarming device, wherein gear identification is conducted through combination of the assemblies, during identification, the microcomputer obtains a virtual gear ratio through the ratio of the vehicle speed to the treading speed and inquires the gear check table according to actual gear information provided by the transmission to obtain a gear shifting-gear ratio, the microcomputer compares the virtual gear ratio with the gear shifting-gear ratio to determine whether gears are unusual or a chain falls down, and a rider is informed when unusual conditions occur.

The invention relates to the technical field of agricultural machinery, particularity a sugarcane harvester. The sugarcane harvester comprises a frame, and a front wheel steering mechanism, a clamping and transporting part, a leaf peeling part, a power transfer system and a leaf and stick collecting and binding part which are mounted on the frame, wherein the leaf peeling part comprises a leaf peeling roll, a first gear and a bevel gear which are mounted in a bearing pedestal on the frame; the leaf and stick collecting and binding part comprises a box rack, a box body, a ratchet wheel, an active ratchet wheel, a sector plate, a first sprocket, a second gear and a sensor connector. By adopting the technical scheme, the sugarcane harvester provided by the invention has the beneficial effects that the sugarcane harvester is technically reasonable and is simpler in integral structure; the production cost is lowered; the work efficiency is improved; the height of the sugarcane harvester is reduced; the sugarcane harvester as a whole is compact in structure, small in size, stable to work and flexible to operate, and avoids phenomena of chain falling, chain cracking and grass entangling; by designing a leaf collecting box and a stick collecting mechanism by virtue of a sensor technology, the sugarcane harvester is advanced in technology and good in piling effect.