87results about How to "Avoid breaking accidents" patented technology

The invention discloses a system and a method for intelligently monitoring a belt-type conveyer for a coal mine steel wire rope core. A monitoring platform of the monitoring system comprises a variable frequency control system, a running monitoring system for monitoring the running state of a steel wire rope core conveying belt and an electromagnetic online monitoring system for monitoring whether a defect is existent in the steel wire rope core conveying belt or not and the type and the position of the existent defect. The monitoring method comprises the steps as follows: 1, starting the conveyer and electromagnetically loading; 2, positioning the connectors on the conveying belt; and 3, acquiring signals in real time and synchronously classifying the signals, namely in the continuous rotation process of the steel wire rope core conveying belt, whether the defect is existent in the steel wire rope core conveying belt or not and the type and the position of the existent defect are determined by the electromagnetic online monitoring system, and the running state of the steel wire rope core conveying belt is monitored by the running monitoring system at the same time. The system and the method are reasonable in design, simple and convenient to use and operate, convenient to realize, good in using effect and high in practical value, and integrate the functions of variable frequency control, running monitoring and electromagnetic online monitoring.

The invention discloses an integrated large-scale raft type culture device. The culture device comprises a body and a fixed berthing device for fixing the body, wherein the body comprises a PE float of which the top is provided with a working platform, and at least six cantilevers connected with the side of the PE float. The PE float has a cavity; the cantilevers are radially arranged along the side of the PE float; an I-shaped steel bar is connected with the bottom end of the PE float; and a weight is connected with a cable on the underside of the I-shaped steel bar. The culture device has the advantages that: the device has a lower integral center and good stability, and realizes the function of controlling the culture water level conveniently; in addition, the culture device has simple operation, great culture space and high production efficiency; and the operating personnel can walk and patrol on the device so as to conveniently find out hidden dangers and carry out the harvest operation. The integrated large-scale raft type culture device has a reasonable structure, good stability, high culture efficiency, convenient patrol and harvest, and simple water level control.

The invention relates to the technical field of steel pipe machining, in particular to a steel pipe grinding device. The steel pipe grinding device comprises a workbench. A motor box is fixedly mounted on one side of the upper end of the workbench. A quick motor is arranged in the motor box. A bearing plate is vertically mounted at the upper end of the workbench. A bearing is mounted between the motor box and the middle of the bearing plate. Two connecting mechanisms are arranged on one side of the bearing plate. A circular plate is fixedly mounted at the tail end of an output shaft of the quick motor, and the two connecting mechanisms are arranged between one side of the circular plate and the bearing plate. A clamping mechanism is arranged on the other side of the circular plate, and a standard steel pipe part is fixed through the clamping mechanism. A plurality of supporting mechanisms are movably arranged between the standard steel pipe part and the upper end of the workbench. A grinding mechanism is further movably arranged on the outer side of the standard steel pipe part, and two sliding mechanisms are arranged between the lower end of the grinding mechanism and the upper end of the workbench. The steel pipe grinding device is stable in structure, good in steel pipe grinding effect and high in safety.

The invention provides a foundation pile for a photovoltaic bracket in a frozen soil area and a manufacturing method thereof, and belongs to the photovoltaic technical field. The manufacturing method comprises the following steps in sequence: (A) a prefabricated pile body is manufactured at the construction site; and a hole is drilled in the mounting area of the foundation pile; (B) the precast pile body is put in the hole; and (C) fine stone concrete is injected in a gap between the precast pile body and the hole wall for grouting and solidification. The quality is more reliable; the curing time after casting of a cast-in-place pile can be saved to accelerate the construction progress; the accident of breakage of a precast pile foundation caused by excessive hardness of frozen soil is prevented; the purpose of reducing damage to the precast pile body by the frost heaving force of the frozen soil is achieved; and the safety of the pile body is protected.

The invention relates to a hydraulic-driving coring tool for a complex well, and belongs to the technical field of oil drilling exploitation down-hole tools. The hydraulic-driving coring tool is formed by an inner rock core cylinder assembly, an outer rock core cylinder assembly and the like; the outer rock core cylinder assembly is composed of an upper connector, a safety connector, an upper spiral centralizer, a middle spiral centralizer, a lower spiral centralizer, a first-section outer rock core cylinder and a second-section rock core cylinder; the inner rock core cylinder assembly is composed of an inner-cylinder upper shaft, a first-section inner rock core cylinder, a second-section inner rock core cylinder and a dual-layer aluminum alloy liner; a bearing hanging steel ball is hung on an inner shoulder of the safety connector through a ball hanging runway, a clamping sleeve ball base is installed on a hanging assembly, centering of the inner cylinder is guaranteed through an inner-cylinder centralizing mechanism, and the hydraulic-driving coring tool is suitable for large-inclined-well coring; a rock-core-claw assembly is composed of a necking sleeve, a clamp-type rock core claw and a clamping-plate rock core claw, in a soft formation, the hanging steel ball and a ball hole of the clamping sleeve ball base are aligned and slide into the clamping sleeve ball base, the hanging assembly is unlocked, and a rock core is cut off through the clamping-plate rock core claw; in a hard formation, pressure of the inner cylinder is increased and subjected to pump suffocation, a drilling tool is lifted when the pressure reaches 16 MPa, and the rock core is clamped and pulled off through the clamp-type rock core claw. The hydraulic-driving coring tool is suitable for core cutting operation under different geological conditions.

The invention discloses a method for producing a millimeter wave antenna slot array sheet. The production method selects tooling equipment suitable for clamping a large-area super-thin sheet, can be used for realizing the reliable clamping of a slot array sheet during high-speed machining by matching with a corresponding clamping pressure plate and a reasonable clamping method, and reasonably selects a micro-diameter cutting tool formed by machining a corresponding material as well as a system tool environment and related parameters which conform to the machining of a slot array so as to ensure that a high-speed and high-precision machining process can be realized. The production method can be used for realizing the production of the slot array in the large-area super-thin sheet, and the high-speed machining of high-precision multi-slot graphs.

The invention provides a stress measurement device for a knob insulator. The stress measurement device comprises a tension sensor, a signal conditioning circuit, an A/D (analog/digital) conversion module, a processor and an input/output module, wherein the tension sensor collects tension of a knob insulator busbar pull wire and processes the tension into a micro-voltage signal, the amplitude and frequency of the signal are conditioned by the signal conditioning circuit, a tension value is obtained after conversion by the A/D conversion module, and the stress distribution condition and the maximum stress are obtained in the processor according to an input tension angle parameter and based on the corresponding relation of preset stress distribution and force load; when the maximum stress is larger than a preset threshold, an alarm message is displayed on the input/output module; or otherwise, the stress distribution condition is displayed on the input/output module. With implementation of the embodiment of the invention, the stress state of the knob insulator can be detected on line, and the device is simple and easy to operate and has high safety, reliability and accuracy, so that the knob insulator can be prevented from breaking accidents.

The invention provides a no-destructive testing method and a no-destructive testing device for creep cavity damage of a high chromium martensitic heat-resistant steel joint. The detection difficult problem of the creep cavity damage of a novel high chromium martensitic heat-resistant steel joint is solved by adopting a nonlinear ultrasonic technology. The damage degree of the joint is evaluated byusing high-order harmonics generated by interaction between high-energy radio frequency pulse and micro defects inside a material. According to the no-destructive testing method disclosed by the invention, the high-temperature creep damage degree of the high chromium martensitic heat-resistant steel joint is detected by using a nonlinear ultrasonic technology, and the quantitative relation between a creep cavity and nonlinear ultrasonic parameters is established, so that the quantitative evaluation of the creep cavity damage during the service of the novel high chromium martensitic heat-resistant steel joint is realized and further long-term safe operation of an ultra-thermal power unit is ensured.

The invention discloses a vacuum circuit breaker electrical life evaluation method based on arc energy, and belongs to the field of vacuum circuit breaker electrical life evaluation. A common commercial vacuum circuit breaker arc voltage database is established based on the experimental data, and meanwhile, the arcing time and the arc current effective value are calculated, then the arc energy accumulation value of a vacuum circuit breaker in each turn-on and turn-off is calculated and is compared with an arc energy threshold value to obtain the residual electric life percentage, so that the working state of the vacuum circuit breaker is evaluated, and whether an early warning prompt is given or not is further determined. According to the method, the problem that the online arc voltage detection is difficult to realize is solved, a foundation is laid for the online monitoring of the electrical life of the vacuum circuit breaker, and the electrical life prediction precision of the vacuum circuit breaker is improved.

The invention discloses a control method of an excellent hot-rolled oriented silicon steel plate shape, and belongs to the field of hot-rolled oriented silicon steel manufacturing. The method comprises the following steps that S1, a heating furnace is used for heating, specifically, the temperature of a soaking section of the heating furnace is 1250-1320 DEG C, and the soaking time is longer thanor equal to 60 min; S2, rough rolling is conducted, specifically, rough rolling is conducted on an E1/R1 reversible rough rolling machine and an E2/R2 reversible rough rolling machine in sequence, andthe temperature of an intermediate billet is larger than or equal to 1120 DEG C after rough rolling is finished on the E2/R2 reversible rough rolling machine; S3, finish rolling is conducted, specifically, seven-rack continuous rolling is adopted, the pass reduction rate in the F1-F7 continuous rolling process is sequentially reduced, the finish rolling F1 reduction rate is 45-50%, and the F7 reduction rate is 5-10%; and S4, laminar cooling is conducted, specifically, the cooling water amount of a nozzle at the edge of strip steel is smaller than that in the middle. According to the method, the defect that in the prior art, the requirements of a hot-rolled oriented silicon steel raw material for performance and plate shape cannot be considered is overcome, the hot-rolled oriented siliconsteel plate with the excellent plate shape is obtained under the condition that it is guaranteed that all key temperature parameters reach the standard, and the obtained plate shape can guarantee thatthe comprehensive yield from the oriented silicon steel raw material to a finished product is larger than or equal to 91%.

The invention discloses a long-neck gas fuel spray nozzle capable of being adjusted in multiple angles. The long-neck gas fuel spray nozzle comprises a metal hose, wherein a pipe connector is fixedly connected to one end of the metal hose, and a fuel gas spray nozzle body is fixedly connected with the other end of the metal hose. The metal hose comprises a corrugated pipe which is wrapped by a layer of metal mesh surface. The metal hose is inserted into the fuel gas spray nozzle body and is connected with the fuel gas spray nozzle body in a welded manner. The wall thickness of the corrugated pipe ranges from 0.3 mm to 0.5 mm. The metal mesh face is formed by weaving metal wires, and materials are 1Cr18Ni9Ti. The metal mesh face and the end of the corrugated pipe are fixedly connected. By means of the design that the metal hose is directly welded to the spray nozzle body, assembling of pipe connectors in a gas turbine is reduced; by means of the flexible connection manner, the displacement, generated in the working process of the gas turbine, of a combustion chamber casing part and an outer duct casing part and thermal deformation of a pipeline are automatically adjusted, and the phenomenon that due to rigid connection, assembling stress is generated due to manufacturing deviation, and cracking accidents are caused due to vibration can be avoided; and the spray nozzle body and a fuel gas branch pipe can be conveniently connected, the structure is compact, and the integral design requirement of the gas turbine is met.

The invention provides an ultrasonic flaw detection method of scraper circular chains and relates to a mining scraper conveyor. By the method, the problem that breaking accidents of circular chains of the conventional scraper conveyor occur frequently and cannot be prevented is solved. The method particularly comprises the following steps of: 1, operating the scraper conveyor at a low speed of 0.3 to 0.5 m/s; 2, starting a flaw detector and turning on a water supply switch of a special probe to supply water for the probe; 3, using the special probe to slide through a straight section, with weld joints, of each circular chain sequentially, and observing echo of a set position; and 4, comparing with echo generated by a standard sample and calculating flaw depth, wherein a warning threshold value is determined by the standard sample, so that accident preventing warning is realized. By the method, the flaw depth can be calculated according to the echo generated by the standard sample and the echo generated by flaw detection of the actual circular chains and a flaw detection operator sends out fault warning, so that the circular chain breaking accidents of the scraper conveyor are avoided.

The invention discloses a slave plate structure for a railway good train coupler buffering device, which comprises a slave plate body and an abrasion plate, wherein the slave plate body is arranged in a coupler tail frame of the coupler buffering device; and the abrasion plate is arranged on one side of the slave plate body, and a main abrasion surface of the abrasion plate is contacted with the coupler tail frame. Because the abrasion coefficient of the abrasion plate is lower, abrasion is only generated on the abrasion plate, and the coupler tail frame has no abrasion basically. Therefore, the condition that the coupler tail frame needs to be welded due to transfinite abrasion cannot occur, and the problem of cracks due to improper welding of the couple tail frame is solved. When the abrasion of the abrasion plate exceeds the limit, only the abrasion plate needs to be replaced, and both the slave plate body and the coupler tail frame can be continuously used so as to save overhaul cost.

The invention provides a low-temperature emergency shutoff valve of a novel spring air cylinder separation structure. A valve body is included and comprises a valve cover, an upper cover and a cylinder cover. A valve clack is arranged in the valve body and connected with a valve rod. A connecting pipe is arranged on the outer side of the valve rod. The part between the connecting pipe and the valve rod is sleeved with a spring. The valve rod penetrates through the valve cover and the upper cover to be connected with a connecting rod, and the connecting pipe is located between the valve cover and the upper cover. The connecting rod is fixed to a piston, the piston is connected with an air cylinder body, the air cylinder body is located on the outer side of the piston, and the air cylinder body and the cylinder cover are connected through screws. The valve body further comprises a manual device. The manual device comprises a guiding wheel, a fixing pin, a spiral groove body and a handle,the connecting rod is connected with the fixing pin, the handle is fixedly connected with the spiral groove body, and the guiding wheel and the fixing pin upwards rotate along the spiral groove section of the spiral groove body.

The invention provides a downward-putting technology for central pipes in a vertical well. The downward-putting technology comprises the following steps that 1, when the specific gravity of the central pipes is smaller than 1, a metal pipe is selected as the first central pipe; 2, screw threads are machined at the two ends of the central pipes, and couplings are mounted at one ends of the screw threads; 3, a circular hole is drilled in the circumferential wall of the first central pipe; 4, an elevator is clamped at the bottom of the corresponding coupling, the coupling end of the correspondingcentral pipe is lifted through drilling machine hanging tongs till the central pipe is completely located in the vertical direction, and at the moment, the central pipe is downwards put into the wellslowly the well through the drilling machine hanging tongs; 5, the coupling end of the other central pipe is lifted till the central pipe is vertical, the other end of the central pipe is separated from the ground, and the lifted central pipe is connected with the coupling end of the central pipe in the well; and 6, the step 5 is repeated till the downward-putting depth of the corresponding central pipe meets the design requirement. According to the downward-putting technology, downward putting of the central pipes in the vertical well can be quickly and safely achieved.

The invention relates to a split-type hydraulic press rack comprising a first frame, a second frame, locating keys, a supporting leg, supporting leg anchoring parts, pull rods and pull rod anchoring parts; the first frame is vertically mounted on the top end of the supporting leg; one side of the first frame is provided with the locating keys; locating key holes are formed in one side of the second frame; the first frame is fitted with the second frame by fitting the locating keys with the locating key holes; and the first frame and the second frame are vertically fixed on the supporting leg by the supporting leg anchoring parts. By changing the structure of the split-type hydraulic press rack, the rack is not needed to be hoisted again after being assembled, so that the problem that an ultralarge hydraulic press rack cannot be wholly hoisted because of being ultraheavy is solved; and the whole hoisting of the rack is simplified to form only single frame hoisting, so that the hoisting difficulty is lowered, it is convenient for production staff to operate equipment, the production cost is reduced, the service life of the rack is prolonged, and the market prospect is wide.

The invention provides a bolt type tool joint which comprises a male tool joint body, a female tool joint body and a bolt. A first bolt opening is formed in the male tool joint body, a second bolt opening is formed in the female tool joint body, the bolt penetrates through the first bolt opening and the second bolt opening, the bolt is a rectangular right-angle table body, and the width of the bolt is smaller than the diameter of the male tool joint body. The bolt type tool joint is convenient to detach and can be conveniently used by a user.

The invention relates to a door body switch structure for a cooking device. The door body switch structure for the cooking device comprises a male switch connector and a female switch connector; wherein the male switch connector is used to be arranged at one of the door body or cabinet body of the cooking device, and the female switch connector is arranged at the other; the switch connector arranged at the cabinet body is electrically connected to a power supply circuit of the cooking device; and when the door body is covered on the opening of the cabinet body, the male switch connector is inserted into the female switch connector, and the two are conducted. Compared with the prior art, the door body switch structure for the cooking device realizes the conduction of the door body circuit by inserting the male and female switch connectors into each other; therefore, the structure is simple, the occurrence of wire bending and breaking accidents can be effectively avoided, and the use security is high.

The invention discloses a tool for quickly loosening a reserved rope and an anchor chain. The tool comprises a base structure fixed to the deck surface of a ship, a hook loosening bottom plate is fixedly arranged on the base structure, a hook provided with the reserved rope or the anchor chain is hinged to the hook loosening bottom plate, a clamping plate used for clamping the hook is further hinged to the hook loosening bottom plate, and the hinge points of the hook and the clamping plate on the hook loosening bottom plate are spaced; and a safety auxiliary groove used for sharing stress is formed in the surface of the hook, or a safety auxiliary hole used for sharing stress is formed in the hook, a steel wire rope used for sharing stress is fixedly arranged on the base structure, one endof the steel wire rope is fixedly connected to the base structure, and the other end of the steel wire rope is connected to the base structure in a fastening or clamping mode. The supporting point oftension is changed, shackles do not need to be disassembled, through mechanical calculation, the mechanical steering working principle and the lever principle, the acting point of force is transferred, the force is reduced, operation is convenient, the hook loosening speed is increased, and the cross arm recycling operation waiting time is shortened.

The present invention relates to a stirring paddle for a mechanical stirring apparatus. The stirring paddle comprises a stirring paddle support base and stirring paddle blades, wherein the stirring paddle support base comprises a stirring main shaft, a support plate fixedly arranged on the stirring main shaft and a fixation frame connected with the support plate. The stirring paddle has characteristics of simple and unique structure, low cost and short production cycle, provides creative improvement for the stirring paddle for the existing domestic mechanical stirring equipment, is suitable for hydrometallurgy, chemical industry, phosphate fertilizer, and other industries, and provides significant economic benefits and social benefits. In addition, based on a large amount of designs, manufactures and installations of stirring equipment and various steel components, the stirring paddle is completed through careful design calculation and assurance of the strength required by stirring.