35results about How to "Eliminate security concerns" patented technology

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

This utility model provides a visual cement mixing pile length positioning device, belonging to the field of cement mixing pile technology. It includes: a pile driver; a mixing rod, which is driven to rotate and extend downwards by the pile driver's drive equipment; and a marking structure movably disposed outside the mixing rod. The marking structure includes a movable ring, multiple friction wheels, a transmission structure, an infrared rangefinder, and a drive motor. The infrared rangefinder is disposed outside the movable ring and is used to measure the distance between the movable ring and the pile driver. The output end of the drive motor is connected to the shafts of the multiple friction wheels through the transmission structure. The beneficial effects of this utility model are: by setting a movable marking structure outside the mixing rod and combining it with an infrared rangefinder to measure the distance between the movable ring and the pile driver in real time, it solves the problem of needing to manually mark the pile outside the tower, eliminates the safety hazards of falls from heights and accidental collisions caused by manual marking, and ensures the personal safety of construction personnel.

This utility model discloses a quartz cylinder transport vehicle for monocrystalline silicon production, relating to the field of photovoltaic manufacturing technology. It includes an AGV (Automated Guided Vehicle) trolley with a stabilizing frame, and a control mechanism mounted on the AGV trolley. The control mechanism drives the quartz cylinder to move. The control mechanism includes a fixed frame connected to the stabilizing frame. The fixed frame is connected to a support assembly for placing the quartz cylinder via a connector, an electric cylinder, and the fixed component. A second connector is mounted on the fixed frame, and an electric cylinder is hinged to the second connector. The end of the electric cylinder away from the connector is hinged to the fixed component. A support frame is fixedly mounted below the fixed component and is fixedly connected to the stabilizing frame. This quartz cylinder transport vehicle for monocrystalline silicon production, by integrating AGV automatic transport, electric cylinder precise lifting and docking, and an automatic anti-sway fastening mechanism, achieves full automation of the quartz cylinder feeding process, reducing labor costs, operational risks, and labor intensity, while improving production efficiency and safety.

The utility model relates to battery protection technical field discloses an automatic redundancy circuit of battery, including main circuit part and control circuit part, the main circuit part includes first contactor, first diode, second contactor, third contactor, second diode, third diode, permanent load, normal and emergency load, charger and switch, the control circuit part includes first control relay, fourth contactor, relay and fuse, the utility model discloses the circuit design of automatic redundancy of battery system, after detecting charger or battery output back power failure, automatically enable redundancy circuit, use battery to carry out power supply to vehicle, has eliminated the security hidden danger and the accident risk of some vehicle system before cutting off because of circuit failure.

The invention relates to the technical field of crude alcohol rectification processing, in particular to a pre-tower vent gas recovery method and application, and has the beneficial effects that gas secondarily cooled out of a pre-tower enters a purge gas washing tower, steam containing a small amount of methanol is absorbed by soft water and then is vented to a torch, and a large amount of methanol condensable components exist in vent gas, so that the gas can be recycled; a cooler is additionally arranged to further cool vent gas, a liquid phase is sent to a crude alcohol tank and then sent to a rectification system, non-condensable gas is sent to a coal grinding station hot blast stove to replace part of fuel gas, meanwhile, potential safety and environmental protection hazards existing in the vent gas are eliminated, economic benefits are remarkable, primary water serves as a cooler cold source, and the primary water is sent to a desalted water station for use after being heated; the water mixing efficiency of desalted water can be improved, and the water consumption is reduced; meanwhile, non-condensable gas is conveyed to a fuel gas pipe network, the fuel gas consumption is further reduced, the refined alcohol yield is increased, and the comprehensive energy consumption is reduced.

This invention discloses a double-end-face self-cooling mechanical seal, relating to the field of centrifugal pumps. The device includes a cooling sleeve, a transmission fixing component, a lower static seal seat, an upper static seal seat, a lower static seal ring, an upper static seal ring, a lower static seal gland, an upper static seal gland, and two sets of clamping moving rings. The cooling sleeve is inserted into the centrifugal pump impeller shaft and is located at the end of the pump head. The transmission fixing component is located inside the cooling sleeve. The lower static seal seat is installed on the side of the cooling sleeve away from the pump head, and the upper static seal seat is installed on the side of the cooling sleeve closer to the pump head. The two sets of clamping moving rings are slidably connected to both sides of the transmission fixing component. Two sets of elastic elements are provided between the two sets of clamping moving rings and the transmission fixing component. This device uses double independent end-face seals to form a double barrier, preventing direct leakage of the medium to the environment; the integrated cooling sleeve allows the sealing components to be fully immersed and cooled, avoiding dry friction burning of the sealing surfaces; and the double-sided independent elastic pre-tightening achieves independent compensation for wear on the upper and lower sealing surfaces.

This utility model discloses a two-way push-button switch, including a base, a top cover, a button, a waterproof ring, a connector, and a PCB board. Tactile switches are located on both sides of the PCB board, and adapter pressing heads are located on both sides of the button. The top cover covers the base. The key improvement lies in the following: the top cover has a raised rocker step on one side of the button, with a first contact plane at the top of the rocker step contacting the top wall of the button; elastic retaining rings are located on both sides of the button, with a second contact plane on the bottom surface of the retaining groove; and retaining steps are located on both sides of the top cover, with a third contact plane on the bottom surface that adapts to the second contact plane; the rocker step, elastic retaining rings, and retaining steps are all located between the two pressing heads. This design uses multiple sets of planar mating surfaces instead of traditional circular mating surfaces, effectively limiting the radial displacement of the button relative to the top cover, preventing the button from wobbling left and right, and ensuring the alignment accuracy between the pressing heads and the tactile switches; at the same time, it constrains the button pressing trajectory, preventing accidental pressing caused by button tilting when pressing one side or the middle, and eliminating circuit malfunctions.

This invention discloses a drying and forming device for copper scrap recycling, relating to the field of copper scrap recycling technology. The device includes an extrusion forming box and a screw conveyor for conveying copper scrap. The extrusion forming box contains a mold component to assist in extruding copper scrap into blocks, and a conveyor plate is provided on the extrusion forming box for conveying the formed copper scrap. This invention integrates feeding, drying, and extrusion forming into a single, coordinated operation. The closed conveying system prevents leakage and contamination from copper scrap and cutting fluid. The dried copper scrap has a low moisture content, eliminating safety and quality risks associated with remelting. The pushing process simultaneously drives a cleaning brush to clean the inner wall of the conveyor cylinder, and a separation tank screens broken copper, reducing downtime for cleaning and improving raw material utilization. An elastic limiting component on the conveyor plate buffers the copper blocks and prevents them from rolling back. The entire system operates fully automatically in a cyclical manner, producing dense and easily transportable formed copper billets, significantly improving copper scrap recycling efficiency and reducing production and maintenance costs.

The application discloses a method for controllable preparation of nanoscale calcium carbonate by taking regenerated micro powder as a calcium source, and comprises the following steps: taking the regenerated micro powder obtained by treating the hydrated cement-based material as the calcium source, dispersing the regenerated micro powder in deionized water or a water solution containing magnesium ions to form a reaction system, performing a wet carbonation reaction by introducing carbon dioxide gas into the reaction system, and realizing the regulation of the crystal form and particle size of the obtained calcium carbonate product by synergistically regulating the process parameters such as the composition of the reaction medium, the reaction temperature, the reaction time, the carbon dioxide flow rate and the stirring speed, so as to prepare nanoscale calcite crystal calcium carbonate or nanoscale calcite / aragonite composite crystal calcium carbonate.

The present application relates to a kind of from bottom to top hole foundation assembly type retaining wall construction method, comprising the following steps: S1, excavate first section retaining wall earthwork;S2, install first section retaining wall and retaining wall chuck and the two are assembled together;S3, erect assembly type retaining wall construction equipment, the 3 hoisting points of first section retaining wall are docked with the 3 hoisting lines of the 3 electric winches of assembly type retaining wall construction equipment;S4, excavate second section retaining wall earthwork;S5, install second section retaining wall in the upper portion of first section retaining wall and connect together;S6, first section retaining wall and retaining wall chuck are disassembled;Start assembly type retaining wall construction equipment, release hoisting line, so that first section retaining wall and second section retaining wall overall settlement;S7, after first settlement is completed, retaining wall chuck and second section retaining wall are assembled together;S8, the method of steps S4-S7 is repeated to carry out cyclic operation, until all retaining wall is installed in place.The method can effectively reduce construction difficulty and operation risk, improve construction efficiency, improve construction quality.

The invention relates to an antimony-free compound clarifying agent for photovoltaic glass as well as a preparation method and a use method of the antimony-free compound clarifying agent. The antimony-free compound clarifying agent is characterized by being prepared from the following raw materials in percentage by weight: 43.65 wt.%-35.19 wt.% of mirabilite, 47.62 wt.%-44.44 wt.% of sodium nitrate, 0.79 wt.%-3.80 wt.% of manganese dioxide powder, 7.94 wt.%-5.56 wt.% of sodium chloride powder and 0.0 wt.%-12.5 wt.% of tin dioxide powder. The antimony-free composite clarifying agent for the photovoltaic glass has the advantages that the antimony-free composite clarifying agent for the photovoltaic glass does not contain an antimony oxide component, is harmless to a human body and pollution-free to the environment, can completely replace an antimony-based clarifying agent, and is lower than the antimony-based clarifying agent in cost; when the antimony-free composite clarifying agent is used for producing photovoltaic glass, various properties of the prepared photovoltaic glass are the same as those of photovoltaic glass produced by an antimony-containing clarifying agent.

The application belongs to the technical field of aircrafts, and particularly relates to a fluid circulation control based aircraft, which comprises an upper streamlined lifting body and a lower streamlined lifting body, annular slits are arranged on the upper streamlined lifting body and the lower streamlined lifting body, and a conical surface is arranged on the upper surface of the upper streamlined lifting body. The aircraft does not need exposed high-speed rotating mechanical components, fundamentally eliminates the safety hazards of blade injury and blade tip flying off, greatly reduces flight noise and downwash flow intensity, and solves the problems of large noise pollution and harsh take-off and landing site requirements of the rotor aircraft. Compared with the traditional Magnus effect aircraft based on solid rotors, the aircraft adopts a fluid film to replace the solid rotors, completely eliminates the defects of large air resistance, mechanical vibration and large inertia of the solid rotors, and realizes wingless flight, low resistance and high response speed.

The utility model discloses a motorcycle upper link plate, including upper link plate main part, sliding part, in the upper link plate main part along horizontal length direction removal, locking structure is used for fixing the sliding part, be equipped with the threaded fixing hole on the sliding part. The utility model discloses the purpose at to solve the technical problem existing in prior art, provide a kind of motorcycle upper link plate, it provides a kind of set flexibility, security, stability and aesthetic property in one's body optimal solution, successfully solved the long-term pain point in the field of motorcycle mobile phone support installation, greatly improved the riding experience.

The application discloses a method for preventing missing inspection and cheating in safety inspection and wall inspection in a coal mine based on an internet of things. The method is unique in controlling safety inspection and wall inspection, that is, the method adopts an internet of things technology to integrate data of multiple information systems in a coal mine to realize forced restraint on a position, a time and an electronic trace of safety inspection and wall inspection, so that missing inspection and cheating of safety inspection personnel and wall inspection personnel are eliminated.

The invention provides a power transmission line tower grounding resistance unwiring-free measurement method and system, and belongs to the technical field of power transmission line operation maintenance and detection, and the method comprises the steps: constructing a tower equivalent loop model, employing a non-contact transformer to synchronously inject a test signal, and collecting multi-path response data, and establishing a multi-parameter complex equation set based on the Kirchhoff voltage law for solving, and finally judging the grounding resistance of the tower according to the order of magnitude relationship between the equivalent impedance and the grounding resistance. According to the invention, through the measurement method without wire releasing and auxiliary electrode bonding, the operation steps are simplified, the working efficiency is improved, personnel are prevented from working in a high-risk environment, and the working safety is improved; meanwhile, the portable design provides effective support for data real-time monitoring, online analysis and operation and maintenance decision on the basis of guaranteeing functionality, and the accuracy, efficiency and safety of power transmission line grounding resistance measurement are comprehensively optimized.

This invention discloses a method, device, equipment, and storage medium for providing low battery reminders for automobiles. The method includes the following steps: constructing a database of charging start times and initial SOC values ​​based on historical charging records; determining an initial SOC threshold and a weighted SOC value based on the database and a pre-selected time series model; determining a first SOC reminder threshold based on the initial SOC threshold and the weighted SOC value; and issuing a low battery reminder if the vehicle's current SOC value meets the first SOC reminder threshold. The beneficial effects are: by providing a low battery reminder based on the first SOC reminder threshold determined from historical charging records and the pre-selected time series model, a reminder more aligned with the user's charging habits can be given, eliminating driving inconvenience and safety hazards caused by excessively low vehicle battery levels.

This invention discloses a multi-station three-dimensional shaft pulling device and its usage method for a high-speed film production line. The shaft pulling device includes a shaft pulling mechanism, a transverse movement mechanism, and an upper shaft mechanism connected sequentially along the conveying direction of the air-expanding shaft. The shaft pulling mechanism has a shaft pulling station, and the upper shaft mechanism has an upper shaft station. The shaft pulling mechanism and the upper shaft mechanism are respectively located on opposite sides of the transverse movement mechanism. In the transverse movement mechanism, the first transverse movement movable frame moves horizontally relative to the transverse movement fixed frame, and its extreme positions are the shaft pulling station and the upper shaft station. The second transverse movement movable frame moves horizontally relative to the first transverse movement movable frame, and its extreme positions are the opposite sides of the first transverse movement movable frame. The usage method is to place the multi-station three-dimensional shaft pulling device near the winding mechanism of the high-speed film production line. The air-expanding shaft is pulled out by the shaft pulling mechanism. The first and second transverse movement movable frames in the transverse movement mechanism move horizontally. After receiving the air-expanding shaft at the shaft pulling station, it is sent to the upper shaft station.

The utility model relates to drinking water disinfection technical field, propose a kind of drinking water disinfection by-product detection and removal device, comprising: storage mechanism, from left to right in turn be set in the top of storage mechanism and remove component and membrane separation mechanism of mixing medicine subassembly, mixing medicine subassembly includes stirring mechanism, dosing mechanism and conveying mechanism. Through water pump one, the medicine water in medicine box is extracted, the medicine water of extraction is transported to the inside of stirring box, through motor driving gear two rotation, gear one meshing connection driving rotating rod is rotated on stirring box, for entering stirring box inside water fake medicine stirring mixing processing, through two granular activated carbon filter screen, for most hydrophilic, low molecular weight trihalomethane, haloacetic acid has good adsorption effect, through vacuum ultraviolet lamp irradiation distance, water has senior oxidation, depth removal, through the filtration of permeating reverse osmosis membrane core, effectively carry out physical barrier, with security removal.

This invention relates to the field of ship propeller shaft system testing technology, specifically to a test device and method for flipping a ship's stern bearing. It mainly consists of a bearing flipping device base, a bearing flipping device liner, a bearing flipping device handle, and related connecting parts. It is connected to the end faces of the stern bearing at the bow and stern ends, respectively. The stern bearing can be flipped by rotating the bearing flipping device handle, and the upper and lower bearing sleeves of the stern bearing can be lifted using the ring screws on the device. This invention utilizes the principle of relative sliding between the friction pair of a sliding bearing and a supporting shaft to flip the ship's stern bearing on the test platform. It enables rapid flipping of the ship's stern bearing, is easy to operate, and achieves stern bearing flipping without disassembling the test shaft, significantly simplifying the testing process, reducing the lifting work of heavy components, effectively eliminating safety and quality hazards caused by disassembly and assembly, and improving overall testing efficiency.

This invention relates to the field of game resource packaging and incremental updates, and particularly to a method and terminal for optimizing application resource loading. The method includes: packaging multiple discrete resource files of the application to generate a resource package file; mapping the resource package file into memory to form a resource memory mapping area; intercepting the application's resource loading function call request, and redirecting the resource loading path in the call request to the resource memory mapping area to read the corresponding resource data from memory. This method avoids the plaintext release of resource files on disk and the exposure of directory characteristics, directly loading resources from the memory mapping area, eliminating the security risks and fragmentation problems caused by disk file release, and improving resource loading efficiency through direct memory access.

The utility model relates to the technical field of cigarette production equipment, and discloses a safety protective cover of a plug assembler, which comprises a box body, a protective mechanism is arranged on the left side of the top of the box body and used for shielding and protecting the left part of the plug assembler, and a supporting mechanism is arranged on the top of the left side of the box body and used for supporting the left part of the plug assembler. The supporting mechanism is used for placing the balance, the protection mechanism comprises a mounting plate, the bottom of the mounting plate is in threaded connection with the left side of the top of the box body, and the left side of the top of the mounting plate is fixedly connected with a safety protection plate. The safety protection plate fixedly connected with the left side of the box body and the safety partition plate in the middle of the right side of the box body form a combined protection structure, internal high-speed running parts are thoroughly isolated, it is ensured that exposed areas on the edge of the assembling machine are completely covered, standardized management of a production site is facilitated, and sufficient reliability is achieved on the safety protection level.

The invention relates to the technical field of fire-fighting emergency, in particular to an intelligent fire-fighting emergency cabinet based on visual perception, which comprises a cabinet body and a storage rack located on the right side of the cabinet body, the storage rack is composed of a plurality of assembly racks from bottom to top, and folding water storage tanks and water buckets are placed in the assembly racks. An operator only needs to press the supporting plate downwards, all the folding water storage tanks and the water buckets can synchronously enter an inclined state, the operator can conveniently drag out or carry the folding water storage tanks and the water buckets, the stability of the container in the inclination process is guaranteed through inclined supporting provided by the auxiliary assembly, and the container is prevented from shaking or accidentally turning over on the plate; the blocking mechanism prevents the container from accidentally sliding forwards due to inertia in the inclination process, potential safety hazards are eliminated, the safety of equipment and personnel is protected, meanwhile, the folding water storage tank is used for storing water and can be rapidly unfolded and spliced to form a heat insulation protection plate when needed, and the heat insulation protection plate is convenient to use. And an additional means for temporarily isolating heat and blocking flames in a small range or opening up a safety channel is provided for fire-fighting or rescue personnel in a fire scene.

A device for online rapid measurement of the length of steel billets entering the furnace, belonging to the technical field of auxiliary equipment for steelmaking production, is used for online rapid measurement of the length of steel billets entering the furnace. The technical solution is as follows: two fixed supports are respectively fixed on both sides of the charging machine support arm. The upper end of the fixed supports has a horizontal fixed shaft. Two rotating arms are respectively composed of swing rods, connecting rods, and pushing rods. The rear end of the swing rods has a rotating shaft hole that is rotatably connected to the fixed shaft at the upper end of the fixed supports. The front ends of the two swing rods are respectively connected to both ends of a measuring ruler, which is opposite to the outer side of the billet conveying roller. The two ends of the two connecting rods are respectively fixedly connected to the rear ends of the two swing rods and one end of the two pushing rods. The rod bodies of the two pushing rods are respectively opposite to the upper surfaces of both sides of the charging machine support arm. Water pipe adapters and cooling water pipes are respectively provided on the rotating arms and the measuring ruler. This utility model can measure the length of steel billets before entering the furnace online, avoiding equipment accidents and eliminating safety hazards.

The utility model discloses center coiling equipment for PTFE (Polytetrafluoroethylene) proton exchange membrane materials, which relates to the technical field of new material processing equipment and comprises a base, one end of the upper surface of the base is fixedly connected with an electric appliance control cabinet, and an auxiliary traction mechanism is fixedly mounted in the middle of one side of the upper surface of the base. The surface friction mechanism is installed at the top end of the auxiliary traction mechanism, the cutting mechanism is installed outside the surface friction mechanism, and the coiling mechanism is installed on the upper surface of the auxiliary traction mechanism. A hidden upturning structure is adopted, operation and maintenance space are not hindered, potential safety hazards are eliminated, the defect that the maintenance position is compact is overcome, and the problems of conductive copper ring wiring and short circuit faults in the prior art are solved through the winding mechanism and the fact that two winding shafts of the winding mechanism are both of a hidden independent driving structure.

The invention relates to the technical field of agriculture and plant protection, and discloses a blueberry garden disease and insect pest green comprehensive prevention and control system construction method comprising the following steps: deploying a distributed sensing network comprising an acoustic sensing unit, a vibration sensing unit, a chemical sensing unit and an environmental parameter unit in a blueberry garden area, acquiring an original analog signal and converting the original analog signal into a standardized multi-mode data stream; the information fusion analysis module is used for determining space-time position information of a biological target, and a deep learning model is used for identifying biological types and behavior modes and evaluating the risk level of diseases and insect pests; a collaborative intervention instruction is generated by using the collaborative intervention decision module, and the behavior interference sound wave emission unit, the natural enemy intelligent release unit or the plant immune resistance inducer trace spraying unit is driven to execute collaborative intervention operation. According to the method, multi-mode accurate sensing and physical and biological collaborative treatment are realized, the blueberry quality is guaranteed, and self-adaptive optimization of a prevention and control strategy is realized.

This invention discloses a double-layer geomembrane dual-track synchronous welding feed device, belonging to the field of civil engineering equipment technology. The base is connected to the bottom of the frame, and a wheel frame is installed inside the base. The frame includes a protective cover with a laser signal transceiver. The frame contains a first cavity and a second cavity. A water-wheel type rope take-up reel is rotatably connected to the wall of the first cavity, and a transmission mechanism is installed in the second cavity. The two free ends of the cable are fixed to the water-wheel type rope take-up reel after passing over their respective fixed pulleys. A traveling trolley is slidably connected to the cable, and an electric telescopic rod is installed at the bottom of the traveling trolley, with an arc-shaped clamp connected below the electric telescopic rod. Compared with existing technologies, this invention has the following advantages: it uses a laser signal transceiver to emit laser light, and the receiving end indicator light confirms the straightness of the path, reducing labor intensity and improving the straightness accuracy of the weld; it adopts an automatic movement method of the traveling trolley along a taut cable; and it uses an integrated external power supply to eliminate safety hazards.

The utility model discloses a device for bridge floor crane support leg stand column height adjustment, the device mainly comprises fixed block group, distribution crossbeam, hydraulic system and pull rod, and the principle of the adjusting device is as follows: when the height that needs to be adjusted is clear, every 0.5m is adjusted through a fixed block, and the remaining height less than 0.5m is adjusted through a jack. For example: when the crane support leg stand column needs to be adjusted to 2.1m, 4 blocks are used to reach 2.0m, and the remaining 0.1m is adjusted through an accurate jacking jack, so that the overall height of the support leg reaches the target value of 2.1m, that is, coarse adjustment 2.0m+ fine adjustment 0.1m. The utility model solves the problems that (1) in the working condition of the slope bridge, the height adjustment efficiency and accuracy of the support leg are difficult to be considered; (2) the safety hidden trouble problem caused by the insufficient tensile capacity of the hydraulic jack.

This utility model discloses a fixed connection structure for preventing misoperation of a circuit breaker, relating to the field of power safety technology. The utility model includes a fixed connection body; the fixed connection body is provided with an upper positioning surface, a lower positioning surface, a front positioning surface, and a rear positioning surface; the upper and lower positioning surfaces are respectively located at the top and bottom of the front end of the fixed connection body and are vertically arranged with the fixed connection body. The upper, lower, front, and rear positioning surfaces connect to form a covering structure surrounding the outer contour of the circuit breaker portion; the rear positioning surface is located at the tail of the fixed connection body, and the rear positioning surface forms an 88° angle with the tail of the fixed connection body. This utility model, through the multi-directional covering structure formed by the fixed connection body, achieves stable positioning and reliable fixation of the circuit breaker body, significantly improving the overall stability and long-term operational reliability of the device. The padlock hole further enhances the safety of electrical operation.

This invention discloses a honeycomb paperboard irregular hole forming device, including a support frame, a rotatable die-cutting disc, multiple die-cutting molds, a stamping mechanism, and a composite drive mechanism. The die-cutting disc has multiple mounting parts, and each die-cutting mold is rotatably connected to one of the mounting parts and can rotate with the die-cutting disc to the stamping station. The stamping mechanism is connected to the composite drive mechanism, and its output part can be detachably connected to the die-cutting mold located at the stamping station. During operation, the composite drive mechanism first drives the stamping mechanism to approach and abut against the die-cutting mold in a straight line, then drives it to rotate clockwise to lock the die-cutting mold, and drives the die-cutting mold to rotate away from the die-cutting disc to complete the stamping. When the die-cutting mold needs to switch to an idle state, the composite drive mechanism drives the stamping mechanism to rotate counterclockwise, causing the die-cutting mold to return to its original position and be supported by the die-cutting disc. After releasing the lock, the stamping mechanism is driven to move away from the die-cutting disc in a straight line. This invention can improve the speed of changing irregular hole die-cutting molds.

The invention discloses a software file integrity protection method and device, equipment and a medium, and relates to the technical field of software integrity protection. The method comprises the following steps: when software is subjected to incremental change every time, performing abstract processing on files associated with the change to obtain corresponding abstract values, and combining the abstract values into an abstract baseline of the change; signature is performed by using a private key, and the signature and the abstract baseline are published along with the change upgrade package; when the integrity of the file in the software needs to be checked, respectively carrying out signature verification on the abstract baselines based on signature data generated by previous incremental changes, and determining a current abstract value of the file; traversing the verified abstract baselines according to any sequence, and searching a target abstract baseline containing file abstract records; and comparing the recorded digest value with the current digest value, and judging whether the integrity verification is successful or not according to the comparison result. Through the technical scheme of the invention, the problems of insufficient signature security in a production environment, overlarge full-quantity signature engineering quantity and the like are solved.