35results about How to "Avoid excess" patented technology

This application discloses an adjustable drying mechanism, which includes a symmetrical support frame, an upper adjusting frame, and a lower adjusting frame. The support frame consists of a base and a vertical support rod; both the upper and lower adjusting frames include a connecting seat, a fixed rod, an adjusting rod, and partitions. The two ends of the upper adjusting frame can move up and down along the support rod, while the lower adjusting frame is fixed to the support rod. The two ends of the fixed rod are fixed to symmetrical connecting seats, and the adjusting rod is horizontally positioned on both sides of the fixed rod, with its two ends embedded in the horizontal slots of the connecting seats to form a sliding pair; multiple partitions are alternately fitted onto the fixed rod and the adjusting rod, and the partitions have elongated holes for sliding cooperation with the fixed rod and positioning holes for interference cooperation with the adjusting rod. By adjusting the height of the upper adjusting frame and the spacing between the partitions, it can adapt to different wood sizes and drying requirements, improve ventilation uniformity and space utilization, and solve the problems of uneven drying and poor adaptability of traditional fixed drying mechanisms. The structure is simple and reliable, and the operation is convenient.

The utility model provides a torsion spring forced twisting device for an automobile seat, which belongs to the technical field of automobile accessory production equipment and comprises a machine table, a mounting seat for placing a spring is arranged in the machine table, a driving structure is arranged at the bottom of the machine table, and an output end of the driving structure is fixedly connected with the mounting seat to drive the mounting seat to rotate. And a first clamping position is arranged on the mounting seat. An auxiliary locking structure is further arranged on the machine table, and a second clamping position is arranged on the auxiliary locking structure. The spring is arranged in an annular mode and provided with an inner coiling end and an outer extending end, the inner coiling end is connected with the first clamping position in a clamped mode, and the outer extending end is connected with the second clamping position in a clamped mode. A torque sensor is arranged below the machine table, one end of the torque sensor is connected with the output end of the driving structure, and the other opposite end of the torque sensor is connected with a spring on the installation base. The device can accurately monitor the torque in the strong torsion process of the torsion spring through the torque sensor, so that the strong torsion effect of the torsion spring is improved, and the quality of the torsion spring is ensured.

The utility model relates to glaze grinding technical field provides a glaze grinding with ball mill, including ball mill main part, support and motor, the both ends of ball mill main part outside are provided with support, and the ball mill main part rotation is arranged between the support, and the end of rear end support is installed with motor, and the motor is connected with the rear end of ball mill main part, and the outside of ball mill main part is provided with the outer sleeve shell, and the top of outer sleeve shell inside is provided with cooling assembly, and the inside of ball mill main part is provided with ball mill cavity, and ball mill cavity is obliquely arranged in the inside of ball mill main part, the utility model discloses the oblique design of ball mill cavity, cooperation ball mill main part rotation, let the grinding ball and glaze reciprocating roll in ball mill cavity. In the rolling process, the frequent and powerful collision, friction of both, greatly improve the grinding efficiency of glaze, can fast glaze processing to the fine degree that meets the process requirement, satisfies the efficient production demand.

The utility model relates to the field of smoking equipment, and discloses firewood smoking equipment for sausage processing, which comprises a base box body, foot cups which are uniformly distributed are fixedly connected to four corners of the bottom of the base box body, trundles are rotatably connected to the bottom of the base box body, a smoking chamber is fixedly connected to the top of the base box body, and the smoking chamber is fixedly connected to the bottom of the base box body. A smoking frame is fixedly connected to the inner wall of the smoking chamber, a smoking chamber door is fixedly connected to the smoking chamber through a hinge, a touch screen is fixedly connected to the left side of the smoking chamber, a smoke circulating device is arranged at the rear position of the left side of the base box body, and a combustion chamber is arranged at the right side position of the base box body. According to the utility model, the firewood combustion chamber and the temperature sensor are adopted, and the operation touch screen and the mechanical button are combined, so that the smoking temperature is effectively controlled, the accurate adjustment of the temperature is ensured, the problem of non-uniform or excessive smoking can be prevented, the cleaning spray head is arranged at the top of the smoking chamber, and clean water in the water tank is used for efficiently cleaning the smoking chamber.

The application relates to the technical field of building material processing, in particular to controllable low-strength material for road surface base and a preparation method thereof, which comprises the following steps: selecting bottom ash of waste incineration, carbide slag, blast furnace slag, fly ash and water as preparation raw materials of the controllable low-strength material for road surface base, stirring the bottom ash of waste incineration, the carbide slag, the blast furnace slag and the fly ash to obtain dry material mixture, then adding water to stir to obtain slurry, and analyzing the unevenness of the material in each period and the stirring fluctuation index in the slurry preparation process to judge the stirring stop time. The application can improve the preparation efficiency of the controllable low-strength material for road surface base, and improve the uniformity of the slurry and the stability of the material performance.

The invention belongs to the technical field of string adjustment, and particularly relates to a violin string tension adjustment control device which comprises an adjustment chamber, adsorption units are symmetrically arranged at one end of the adjustment chamber, positioning units are arranged on the sides, close to the adjustment chamber, of the adsorption units, an adjustment unit is arranged on one side in the adjustment chamber, and a feedback unit is arranged on one side of the adjustment unit. Through the lifting effect of the electric telescopic rod and the face-to-face or back-to-back movement between the idler wheels, lifting and sudden release of strings are achieved, then radial jumping of the strings is degraded and buffered through the multi-degree-of-freedom string roller, dominant impact between the lower electrode cap and the electrode ball is controlled through the prying roller short section, and therefore the electrode ball can be driven to move stably and stably. The high-frequency impact state between the strings and the long section of the prying roller is expressed, that is, impact feedback of the strings in a low-frequency state is explicitly and prominently expressed through an extended range, the change of tension is accurately sensed, excessive or insufficient adjustment is avoided, the overall tone balance is optimized, and the harmony degree and expressive force of the tone of the violin are improved.

The application discloses a HPLC communication mode selection method based on an OFDM system and belongs to the technical field of communication. The HPLC communication mode selection method based on the OFDM system comprises the following steps: a first signal frame is transmitted in a first diversity copy mode, so that the receiving end decodes and processes the first signal frame; if no acknowledgement frame used for indicating decoding success is acquired, a second diversity copy mode with a transmission rate level lower than the first diversity copy mode is selected, a second signal frame is transmitted in the second diversity copy mode; if no corresponding acknowledgement frame is still acquired, the steps of selecting and transmitting a next signal frame are repeatedly executed until the corresponding acknowledgement frame is acquired; a target diversity copy mode is determined according to the selected diversity copy mode, and data is transmitted in the target diversity copy mode. The application realizes high-efficiency and high-reliability data transmission.

The utility model discloses a kind of polishing devices for air pipe engraving, it is related to air pipe processing technical field, including workbench, the top of workbench is installed with board, the upper of board is provided with polishing roller, the side of polishing roller is provided with adjusting assembly for adjusting its height, the outside of board is provided with clamping assembly for fixing it;The adjusting assembly includes sliding seat and first adjusting plate sliding in the inner wall of workbench, and the side of sliding seat is rotatably connected with one end of polishing roller, the utility model has the beneficial effects that: by setting adjusting assembly, the height of polishing roller can be adjusted, polishing roller height can be flexibly adjusted, accurately match different thickness board, realize uniform polishing, avoid excessive or insufficient polishing, height can be adjusted in time according to polishing roller wear, ensure stable working performance, prolong its service life, reduce maintenance cost.

This invention provides a hydraulic integrated control system and method for an automatic weighing machine, relating to the field of hydraulic control technology. The system includes: a data receiving module for receiving raw weight signal streams, raw position signal streams, and raw vibration spectrum streams; a clutter filtering module for adaptive cooperative clutter filtering to obtain corrected weight signal streams and corrected position signal streams; a deviation calculation module for calculating real-time feeding lag deviations; a decision module for making feeding speed switching decisions and outputting a feeding gate control command sequence; a feedback module for performing handling task trajectory interpolation feedback to obtain multi-axis cooperative motion commands; and a timing control module. This invention solves the technical problem that existing automatic weighing machines, when performing multi-axis cooperative motions such as handling and conveying, often rely on single-axis control and lack efficient multi-axis cooperative control schemes, leading to reduced equipment accuracy and overall work efficiency.

The utility model relates to the technical field of plate film coating processing, in particular to plate film coating equipment capable of preventing film surface corona treatment effects from being inconsistent, which comprises a corona generating device, the corona generation device comprises a corona support, a corona roller rotationally arranged on the corona support and a plurality of discharge teeth which are arranged on one side of the corona roller, the extension direction of the discharge teeth is parallel to the axis of the corona roller, and the discharge teeth are uniformly distributed in the circumferential direction of the corona roller; a discharge gap is formed between the discharge end surface of each discharge tooth and the surface of the corona roller, and the discharge gap is used for a film to pass through; the corona roller has the beneficial effects that the discharge teeth are uniformly distributed in the circumferential direction of the corona roller, so that the corona treatment effect received by a film when the film passes through a discharge gap is consistent, insufficient or excessive local treatment is avoided, the bonding uniformity after film coating is further improved, and the problems of local delamination or bubbles and the like of a plate are avoided.

The utility model belongs to the field of tank car material transfer devices, and particularly relates to a tank car material transfer device which comprises a tank car carriage, a feeding assembly is fixedly connected to the interior of the tank car carriage, a discharging port is fixedly connected to the side face of the tank car carriage, a feeding port is formed in the position adjacent to the discharging port, and a discharging port is formed in the feeding port. Hinges are fixedly connected to the side faces of the discharging port and the feeding port, baffles are fixedly connected to the side faces of the hinges, lock catch structures are arranged on one sides of the baffles, and a plurality of sleeve holes are sequentially formed in the surface of the tank car compartment from top to bottom at equal intervals. Through the structural design that a driving motor in the feeding assembly drives a propeller rod to rotate and the flow guide effect of a conical guide groove and a U-shaped material collecting groove, granular materials with large weight in a tank compartment can be stably pushed to another tank compartment from a discharging opening, the problem that a traditional air compression type transferring device cannot convey large-particle materials is solved, and the conveying efficiency is improved. And the applicability and efficiency of material transfer are obviously improved.

The application provides a user interest-oriented fragmented learning time optimization distribution method and system, relates to the technical field of data processing, and the method comprises the following steps: acquiring user learning characteristic data; combining the user learning characteristic data, establishing a discrete time dynamic function for describing knowledge state evolution, and determining the knowledge state value of the user for different learning themes; combining the discrete time dynamic function to establish a virtual learning demand queue, and determining a Lyapunov control parameter for balancing the backlog degree of the virtual learning demand queue based on the virtual learning demand queue; constructing a convex optimizer with the output being the optimal distribution duration of the learning theme; determining the current time fragment, the current knowledge state value and the current virtual learning demand queue; inputting the current time fragment, the current knowledge state value and the current virtual learning demand queue into the convex optimizer to output the optimal distribution duration of each learning theme; and sequentially pushing each learning theme corresponding to the optimal distribution duration to the user.

The utility model discloses a new energy automobile charging cable, which comprises a cable connecting mechanism, a pushing tight connecting mechanism and a pushing auxiliary mechanism, the cable connecting mechanism comprises a connecting wire, a matching wire, a matching hole, a matching block and a side pushing ring, and the pushing tight connecting mechanism comprises a clamping pipe, an inclined block, an inclined moving block, a pushing spring frame, an inner pushing ring, a connecting rod and an outer moving ring. Through mutual cooperation of a cooperation block, a cooperation hole and a cooperation line, tight connection of a cable and a charging head is ensured, the phenomenon of loosening or poor contact is avoided, through cooperation of a clamping pipe, an inclined block, an inclined moving block and other assemblies, when a user inserts the cable, automatic tight connection can be achieved through a push spring frame and an inner push ring, and the user experience is improved. The connecting line and the matching line are contacted more tightly, stable current transmission is ensured, and the design of the outer rotating ring and the spiral plate enables the rotating action to drive the longitudinal moving ring to move longitudinally, so that the inner pushing ring and the inclined moving block are pushed to move, and the tight connection process is assisted to be carried out smoothly.

This invention relates to the field of vehicle technology and discloses a steering control method, device, and vehicle. The steering control method includes: acquiring the vehicle speed and, based on the correlation between the vehicle speed and the steering assist style, acquiring a target steering assist style adapted to the vehicle speed; acquiring a target assist torque corresponding to the target steering assist style based on the vehicle speed and the correlation between the steering assist style and a preset assist torque; and adjusting the vehicle's steering torque based on the target assist torque. This invention can enhance the user's active control over the vehicle's steering and make the steering control more in line with the user's driving intentions and personalized needs.

The utility model discloses a silk thread flat pressing device for battery piece production, which relates to the technical field of battery piece production and comprises a main body, an air pressure device is arranged on the main body, a plurality of air cylinder devices are arranged below the air pressure device, and the output end of the air pressure device is communicated with the input end of each air cylinder device. The output end, located on the bottom face, of each air cylinder device is connected with a flattening block, and the air pressure device is an air compressor. The multiple air cylinder devices are driven through the air pressure device, compared with a traditional eccentric roller or a special-shaped shaft, the rolling efficiency is higher, the multiple air cylinders act synchronously, it is guaranteed that the flattening block outputs pressure evenly, insufficient or excessive deformation of a wire caused by pressure fluctuation is avoided, and the conductivity and the connection precision of battery pieces during welding are guaranteed.

The present application relates to a kind of anterior thigh flap positioning system and method of maxillary defect volume reconstruction, belong to maxillary defect reconstruction technical field, solve the problem that maxillary defect soft tissue repair reconstruction volume is difficult to accurately predict in prior art, anterior thigh flap size mainly relies on experience, and the matching degree of flap volume and defect volume is insufficient.The maxillary defect volume prediction module is used to reconstruct maxillary bone and tumor three-dimensional model, and then the maxillary defect volume and defect region morphology are predicted;Flap thickness acquisition module is used to reconstruct lower limb donor area soft tissue three-dimensional model and penetrating branch blood vessel three-dimensional model, and then the dominant penetrating branch is determined, and the donor flap thickness is obtained;Anterior thigh flap positioning module generates anterior thigh flap contour in lower limb donor area soft tissue three-dimensional model according to the predicted maxillary defect volume, defect region morphology and donor flap thickness.Accomplish the accurate prediction of maxillary defect volume and the accurate positioning of anterior thigh flap.

The application discloses a desulfurization slurry physical defoaming device and a defoaming method, and belongs to the technical field of defoaming separation. The method comprises the following steps: overflowing the foam-containing slurry into a defoaming separation device; performing preliminary physical defoaming by using a multiple mechanical defoaming module driven by slurry flow force; performing ultrasonic defoaming on the collected slurry by a dynamic ultrasonic defoaming module; filtering and dynamically cleaning the slurry after defoaming by using a filter integration processing module; guiding the purified slurry back to a desulfurization system, and discharging the remaining foam and slurry into a pit. The application adopts a multistage physical defoaming mode combining mechanical extrusion, ultrasonic vibration and filter cleaning, has the advantages of high defoaming efficiency, online slurry recovery, filter screen blockage avoidance and pit load reduction.

The utility model relates to the technical field of waste water recovery, in particular to a waste water recovery device which comprises a device frame, a liquid storage tank is mounted in the device frame, a mounting seat is mounted on the surface of the top of the liquid storage tank through screws, and a controller is mounted on the surface of the device frame. An indicator lamp is installed on the surface of the controller, a stainless steel centrifugal pump is installed on the surface of the top of the mounting base, a liquid level detection mechanism is arranged on the surface of the liquid storage tank, and a vacuumizing prevention mechanism is arranged on the surface of the liquid storage tank. When the recovery device is used, the stainless steel centrifugal pump can be automatically controlled to be started or closed, water shortage protection and overflow prevention can be carried out on the interior of the liquid storage tank when the recovery device is used, and the phenomenon that water cannot enter the liquid storage tank due to vacuum pumping or internal pressure can be prevented when the recovery device is used.

An intelligent mine monitoring system disclosed by the present invention comprises a mounting base, a monitoring device is arranged on the mounting base, a camera is arranged on the monitoring device, and the monitoring device comprises a transmission module, an intelligent control module and an image acquisition module connected with the camera. The image collection module transmits images collected by the camera to the intelligent control module through the transmission module, the collected images are recognized and judged through the intelligent control module, and the judgment result is divided into two types of being lower than a cleaning threshold value and being higher than the cleaning threshold value. The dirt degree of a camera lens can be automatically judged according to an image collection result, cleaning is accurately started and finished, excessive or insufficient cleaning is avoided, a water spraying wiping + air spraying cleaning + air drying combined mode is adopted, water beads and air drying equipment are blown through the elastic cleaning part in cooperation with warm water wiping and washing, cleaning is more thorough, and the cleaning efficiency is improved. And efficient cleaning and air drying are achieved.

The application discloses a kind of remote real-time water quality alarm systems for water purification equipment, belongs to the technical field of alarm notification, specifically includes: water quality acquisition judging module, for continuously monitoring whether water quality is abnormal, when water quality is abnormal, sends abnormal signal to central processing unit;Central processing unit, for receiving abnormal signal, determines abnormal device according to abnormal signal;Influence range evaluation module, for combining the position of abnormal device in water supply network and its position relationship with other abnormal devices, evaluate the influence range of abnormal device;Hierarchical alarm module, for generating the abnormal device alarm instruction of corresponding level according to the influence range of abnormal device;Emergency notification module, for generating abnormal device alarm notification measures according to the level of abnormal device alarm instruction, combining abnormal device position importance and influence range.

The application belongs to the field of robot positioning, and relates to a self-adaptive layered robot positioning method and device for degenerative scenes, which comprises the following steps: monitoring the data quality obtained by a heterogeneous sensor in real time, mapping the state of the heterogeneous sensor to a unified quantization space, and outputting a unique degenerative level identifier D1-D4; for a D1 environment, the uncertainty of feature matching is quantified, and the most contributive feature subset is selected; for a D2 environment, a singular value decomposition is used to locate a degenerative subspace; for a D3 environment, an expected error of the heterogeneous sensor engine is estimated through a performance prediction network, and a continuous confidence weighting is used instead of hard switching; for a D4 environment, a pre-training-fine-tuning-online adaptation three-level architecture is used to provide a cross-platform generalized pure inertial odometer; and historical events are stored as experience data. The application realizes fine differentiation and directional processing of degenerative scenes, and builds an experience-driven closed-loop optimization mechanism.

The application discloses a robot self-evolution cleaning path planning method based on a dust deposition dynamics model, and belongs to the technical field of intelligent cleaning robot path planning, and comprises the following steps: ground material identification is performed on a cleaning area, and the cleaning area is divided into material subareas, and a deposition characteristic parameter group containing a cementation critical thickness value and a cementation sensitive coefficient is constructed; dust deposition thickness of each subarea is acquired based on a dust sensor, a cementation risk value is calculated, and a preventive priority cleaning area is determined; a path node execution sequence is dynamically adjusted according to the cementation risk, and a robot advancing speed and a suction force gear position are adaptively adjusted; after cleaning is completed, a cleaning efficiency feedback is constructed through a dust thickness difference before and after cleaning, the deposition characteristic parameter group is iteratively corrected, and model self-evolution updating is realized. The application can realize prospective identification and dynamic regulation and control of dust cementation risk, and improve the intelligence of path planning and cleaning operation efficiency.

The utility model relates to the technical field of automobile front anti-collision beam supporting plates, and discloses an automobile front anti-collision beam supporting plate drawing forming die which comprises a fixed frame, a lower die, a lifting type upper die, an opening mechanism and a conveying mechanism. The opening mechanism and the conveying mechanism are arranged, through operation of the opening mechanism, holes in all point positions of the inner wall of the lower die can be opened, lubricating grease can be accurately conveyed to designated positions in a groove of the lower die in the opening process, and the lubricating grease can be accurately conveyed to the designated positions in the groove of the lower die in the closing process. And the inner wall of the groove of the lower die can be kept flush with the inner wall of the groove of the lower die, so that the workpiece machining work is not affected. In the process that the conveying mechanism conveys the lubricating grease, it is guaranteed that the lubricating grease can be smeared to the designated position of the inner wall of the groove of the lower die every time, and in the process of smearing the lubricating grease, the problem that the amount is too large or too small due to traditional manual smearing can be avoided through automatic control.

The application discloses a long-time fire-out system and control method of a circulating fluidized bed boiler, which comprises a combustion and circulation system, a tail flue system, an energy storage and release system and a measuring and controlling device. The tail flue system is communicated with the water-vapor pipeline and the flue gas pipeline of the combustion and circulation system through pipelines. The water-vapor pipeline of the combustion and circulation system is communicated with a steam turbine. The energy storage and release system is arranged in the combustion and circulation system and can store and release at least part of high-temperature medium. The measuring and controlling device is arranged on the pipeline connecting the combustion and circulation system and the steam turbine. The scheme can effectively solve the technical bottleneck that the steam turbine cannot be operated for a long time without being disassembled due to the rapid attenuation of main steam parameters in the fire-out peak regulation process of the existing CFB unit. By introducing the high-temperature ash energy storage and release mechanism, the heat energy maintaining capacity of the CFB boiler under the fire-out state is remarkably improved, so that the duration of the near-zero output (≤2% load) of the steam turbine is prolonged.

The invention relates to a resource allocation method and device for public test tasks, equipment, a storage medium and a program product. The method comprises the steps of obtaining a to-be-tested public test task, wherein the to-be-tested public test task comprises task description data; inputting the task description data into a preset index scoring model for processing, and calculating to obtain a multi-dimensional evaluation result, a target skill label and a vulnerability category of the to-be-tested public test task; determining a dynamic regulation factor according to the multi-dimensional evaluation result, the target skill label and the vulnerability category; the dynamic regulation factor comprises a market supply and demand coefficient and a risk penalty factor; and allocating corresponding resources to the to-be-tested public test task according to the multi-dimensional evaluation result and the dynamic adjustment factor. By performing multi-dimensional evaluation on the crowd test task, effective identification of the self state of the crowd test task is realized, the dynamic regulation factor is determined based on the self information of the crowd test task, accurate identification of the external environment is realized, the incentive limit can be accurately generated, and the accuracy of the allocation result is improved.

This invention discloses a multi-source low-oxygen heat pump device for fruits and vegetables and its usage method, belonging to the field of fruit and vegetable drying technology. The device includes a multi-source gas supply system, a low-oxygen drying chamber, a heat pump temperature and humidity control system, an online weighing system, a material morphology detection system, and an intelligent control system. The multi-source gas supply system injects nitrogen, carbon dioxide, and air. The intelligent control system calculates the drying rate and shrinkage rate based on data from various sensors, dynamically adjusting the gas composition and the temperature and humidity inside the chamber to maintain an oxygen concentration of 1-11%, a temperature of 30-70℃, and a relative humidity of 10-40%. This invention enables precise and coordinated control of the fruit and vegetable drying process, mainly used for drying leafy vegetables and fruits, reducing oxidative deterioration and shrinkage, and improving drying quality.

This invention relates to the field of water resource recycling technology and provides a hydrological water resource recycling purification device, comprising: a control unit, which is connected to an adjustable component in the sensing and detection unit and the physical processing unit, for receiving monitoring data from the sensing and detection unit, constructing multiple evaluation models based on the monitoring data and outputting corresponding evaluation indicators, and generating adjustment commands for the opening rate of the adjustable perforated rectifier structure and the flow rate of the backwash pump based on the comparison results of the output evaluation indicators with preset thresholds, so as to maintain the water purification stability of the entire system process. This system realizes dynamic and refined control of the water purification stability of the entire process of the hydrological water resource recycling purification device. The adjustable perforated rectifier structure adjustment module optimizes the influent flow pattern from the source, enhancing the system's adaptability to fluctuations in influent water quality.

The application relates to the technical field of robot control, and discloses a collision management method, device, equipment and medium for a biped humanoid robot, wherein the method manages collision risks by processing time sequence visual data containing continuous multiple frames of image data and corresponding depth information. Specifically, the method first identifies and tracks two-dimensional key points of the robot across frames from the image data, and then converts the key points into a time sequence three-dimensional coordinate sequence in a world coordinate system in combination with the depth information. Based on analysis of the three-dimensional coordinate sequence, the risk level of the robot currently in is judged, and a corresponding protection strategy is generated accordingly. Through time sequence visual analysis, the application realizes effective management of collision risks of the biped humanoid robot, and improves the accuracy of judgment.

This utility model relates to the field of fuel refueling technology, specifically a multi-functional metering refueling device, comprising: a metering device; a display screen is provided on one outer wall of the upper end of the metering device; control buttons are provided on both outer walls of the upper end of the metering device; a second connecting pipe is fixedly connected to one outer wall of the metering device; a sliding groove is formed on one outer wall of the second connecting pipe; a retaining ball is movably connected to one outer wall of the sliding groove; a spring is movably connected to one outer wall of the sliding groove; multiple sealing grooves are formed on both sides of the inner wall of the second connecting pipe; a sleeve is movably connected to one outer wall of the second connecting pipe; and a limit ring is fixedly connected to one inner wall of the sleeve. This utility model solves the problems of complex connection structures, lack of sealing and quick restoration of stable connections in existing fuel refueling equipment, making it difficult to ensure the safety and continuity of refueling operations.

This invention discloses a method and system for calculating the strength of surrounding rock based on the equivalent support reaction force of prestressed anchor bolts, relating to the field of surrounding rock data processing technology. The method includes: acquiring the initial mechanical parameters of the surrounding rock, tunnel excavation parameters, and anchor bolt support design parameters; calculating the cohesion increment, the elastic modulus of the anchor bolt-surround rock composite structure, and the equivalent support reaction force based on the design parameters; superimposing the cohesion increment with the initial cohesion of the surrounding rock to obtain the total cohesion; applying the equivalent support reaction force as a boundary condition to the bearing arch model; calculating the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient in parallel; and synthesizing the rock mass strength safety factor, the anchoring system efficiency coefficient, and the comprehensive deformation stability coefficient to obtain the final surrounding rock strength safety factor. This invention, through quantitative analysis, reduces the possibility of engineering risks and provides technical support for the special and complex engineering type of large-span tunnels.