887results about How to "Reduce distortion" patented technology

The invention relates to the technical field of part typesetting, in particular to a nesting typesetting mixed common-edge analysis method and system based on laser cutting. The method comprises the following steps: obtaining initial typesetting part structure data, and carrying out part common-edge relation analysis to obtain part common-edge relation data; common-edge path optimization is carried out according to the initially-typeset part structure data, and optimized part cutting path data is obtained; performing laser cutting simulation based on the optimized part cutting path data to obtain laser cutting simulation data; performing typesetting heating balance optimization according to the laser cutting simulation data so as to obtain optimized part typesetting data; and performing cutting waste rate evaluation on the optimized part typesetting data to obtain typesetting cutting waste rate data, and performing minimum cutting waste rate optimization on the optimized part typesetting data based on the typesetting cutting waste rate data to obtain optimal part typesetting data. The cutting efficiency and precision are improved.

The invention relates to the technical field of glass bottle defect detection, and particularly discloses glass wine bottle body defect optical detection equipment and detection method.The optical detection equipment comprises a conveying belt, and a clamping mechanism, a lifting rotating mechanism, a detection mechanism and a sorting mechanism are sequentially arranged on the conveying belt from the feeding end to the discharging end. The detection end of the detection mechanism is attached to the bottle body of the glass wine bottle for optical detection, the receiving end of the detection mechanism receives the light in the glass wine bottle, the light directly reaches the receiving end in the bottle after passing through a bottle body material, and a signal path is relatively fixed, so that the interference of ambient light or reflection of surrounding objects on an optical signal can be effectively reduced. The bottle body of the glass bottle has a certain thickness, deviation of light scattering and refraction is easy to occur when light passes through the thickness of the glass in traditional external detection, the error can be reduced by matching of an external detection end and an internal receiving end, fine defects such as bubbles, cracks or tiny scratches are helped to be captured, and the detection stability is improved.

The utility model discloses an intellectualized safety control take-up straining device, including handle subassembly, base subassembly and long braid, handle subassembly includes handle and ratchet wheel, base subassembly includes base, handle and base are pivoted and rotatingly connected through take-up shaft, ratchet wheel is fixed on take-up shaft, and the winding drum is fixed between the ratchet wheel, and the long braid is fixed on the base. The ratchet wheel, the winding drum and the tape winding shaft rotate synchronously, the winding drum is sleeved outside the tape winding shaft and is coaxially arranged, an opening for the long braid to pass through is arranged on one side of the winding drum, one end of the long braid is sleeved on the tape winding shaft and is led out from one end of the base through the opening on the winding drum, one end of the tape winding shaft is connected with the coil spring assembly, and the coil spring assembly comprises a coil spring, a coil spring box and a coil spring box cover. The coil spring box is covered with the coil spring box, a brake assembly is further arranged in the coil spring box, and one end of the tape winding shaft can be provided with a C-shaped opening, an eccentric shaft or a concentric screw hole according to the structure of the brake assembly. According to the utility model, the long braid can be prevented from swinging to hurt an operator, and the personal safety of the operator is guaranteed.

The invention relates to the technical field of batteries, and discloses a riveting top cover, a battery cell cover plate and a battery cell. Wherein the riveting top cover comprises a riveting block and a pole column, the riveting block is provided with a through hole, the through hole comprises a matching hole, a secondary riveting hole and a main riveting hole which are coaxially arranged in sequence, the pole column comprises a base and a protruding part arranged on the base, the protruding part is provided with a matching section, a secondary riveting section and a main riveting section which are in one-to-one correspondence with the matching hole, the secondary riveting hole and the main riveting hole, and the matching section, the secondary riveting section and the main riveting section are in one-to-one correspondence with the matching hole, the secondary riveting hole and the main riveting hole. The first annular cavity is reserved between the secondary riveting section and the secondary riveting hole in the pre-assembly state, the second annular cavity is reserved between the main riveting section and the main riveting hole, and the first annular cavity and the second annular cavity respectively reserve material expansion spaces for the secondary riveting section and the main riveting section. Therefore, part of the first annular cavity can be filled with the secondary riveting section after the secondary riveting section expands under the action force, the phenomenon that the riveting block is locally expanded or deformed due to expansion of the secondary riveting section in the traditional riveting process is avoided, and the yield of the riveted top cover is improved.

The invention relates to a power data federated learning privacy protection method based on efficient homomorphic encryption. The method comprises the following steps: step 1, a client initializes a neural network model; step 2, the server side encrypts and updates local neural network model gradient parameters uploaded by the client side; 3, the server side executes gradient average aggregation operation, the server side does not need to decrypt, the encrypted gradient parameters uploaded by the client side are directly calculated, an average value is solved, and therefore global gradient parameters are updated; step 4, after each client receives the updated global gradient, carrying out decryption calculation operation; 5, loading the updated weight parameters of the neural network model into a local neural network model, and performing neural network model training by using a local data set; the problems that an existing encryption technology is large in operand, large in computing resource overhead and low in algorithm efficiency, and privacy leakage exists in the transmission and analysis process of power data can be solved.

The utility model belongs to the field of parking space locks, and discloses a parking space lock movement with an emergency structure and a parking space lock. A parking space lock movement with an emergency structure comprises a driving mechanism; a rotating member; and a transmission mechanism. The parking space lock comprises the parking space lock movement with the emergency structure and further comprises a connecting arm, a connecting shaft, a blocking piece, a main shaft and a connecting base. According to the parking space lock machine core with the emergency structure, when the driving unit stops, the rotating piece is rotated to drive the transmission piece to rotate together, so that emergency operation can be achieved through the rotating piece, no clutch step exists between the rotating piece and the transmission piece, and operation is convenient and fast; according to the parking space lock, the main shaft and the connecting shaft are arranged in parallel at an interval, the moving piece is matched with the connecting arm to drive the blocking piece to turn over in a moving mode, therefore, the driving unit outputs small torque to drive the blocking piece to turn over, the swing amplitude of the connecting arm is small, and flat design of the parking space lock is facilitated.

The utility model belongs to the field of parking space locks, and discloses a parking space lock which comprises a blocking piece, a locking piece and a locking piece. A driving unit; a transmission mechanism; a linear track; a substrate; when the driving unit drives the transmission part to move, the transmission part drives the moving part to slide along the linear rail and drives the connecting arm to slide along the linear rail and rotate relative to the moving part at the same time, so that the connecting arm drives the blocking part to turn over. When the blocking piece is subjected to external impact force in the open state, the blocking piece drives the connecting arm to move, the connecting arm drives the moving piece to slide relative to the linear rail, and the linear rail limits displacement of the moving piece in the direction perpendicular to the sliding direction of the moving piece. Power transmission is achieved through the transmission mechanism, the linear rail and the connecting arm are arranged independently, and the strength of the connecting arm and the transmission stability are guaranteed while the connecting arm moves; the linear track can assist the moving part in linear motion and can offset external impact force, so that the moving part is protected and prevented from being deformed and damaged; all the components can be integrated on the base plate, and therefore a user can conveniently install the parking space lock.

The invention discloses a uniform stranding device for aluminum alloy stranded cable processing, which comprises two stranding discs, an adjusting assembly, a limiting plate, support frames, a stranding disc and a die sleeve, and is characterized in that a plurality of support frames which are uniformly and annularly distributed and are used for mounting pay-off discs are arranged between the two stranding discs, and the adjusting assembly comprises a first gear, a second gear and an inner gear ring; the multiple second gears are located among the first gear, the second gears and the inner gear ring and are engaged with the first gear and the inner gear ring, the second gears and the supporting frame are fixedly connected and are rotationally connected with the first wire twisting disc, and the limiting plate is provided with a positioning rod used for positioning the first gear and the inner gear ring; according to the uniform stranding device for aluminum alloy stranded cable processing, a second gear in an adjusting assembly is limited through a positioning rod of a limiting plate, the rotating state of a supporting frame on a first stranding disc is adjusted, back-twist stranding processing and non-back-twist stranding processing of the aluminum alloy stranded cable are achieved, and the uniform stranding device is suitable for stranding processing requirements of aluminum alloy wire cores with different cross sections.

The invention discloses a display panel defect detection method, device and equipment based on attention potential energy, a medium and a product. The method comprises the following steps: acquiring an image set of a multi-scale channel associated with a to-be-detected panel; performing quality assignment on each image pixel in the image set of the multi-scale channel to obtain a point mass body set of the multi-scale channel; constructing an attention potential energy function, and obtaining an attention potential energy vector set of the multi-scale channel according to the point mass body set of the multi-scale channel; and obtaining a defect detection result of the to-be-detected panel based on the attention potential energy value and the attention potential energy range associated with the attention potential energy vector set of the multi-scale channel. According to the invention, the defect detection result and the human eyes have extremely high alignment, so that the distortion of the detection result is reduced.

The utility model belongs to the field of parking space locks, and discloses a buffering parking space lock movement and a parking space lock. The utility model discloses a buffering parking lock movement which comprises a transmission mechanism and a buffering mechanism. A driving unit; a supporting seat; a movement cover; when the driving unit drives the screw rod to rotate, the screw rod drives the nut to move along the linear track; when the nut is subjected to external impact force in the first direction, the nut drives the screw rod to move in the first buffer gap along the linear track relative to the supporting seat; the parking space lock comprises any one of the buffering parking space lock movement, a connecting arm and a blocking piece. According to the buffering parking lock machine core, power transmission is achieved through the transmission mechanism, so that the nut, the screw rod and the driving unit are subjected to buffering protection through the first buffering gap, and deformation and damage of the nut, the screw rod and the driving unit when the nut, the screw rod and the driving unit are subjected to external impact force are reduced; according to the parking lock, the buffering parking lock movement is adopted, the linear track and the connecting arm are arranged independently, and the whole structure is stable in movement.

The invention discloses a preparation method of a high-strength semi-solid lithium battery diaphragm, and belongs to the technical field of battery diaphragms. The invention discloses a preparation method of a high-strength semi-solid lithium battery diaphragm. The preparation method comprises the following steps: S1, preparing an LLTO active skeleton with a 3D nano structure and preparing a gel matrix; s2, embedding the gel matrix into the active skeleton to form a rapid ion transport layer; s3, embedding the gel matrix into the inert skeleton to form a stable layer; and S4, combining the rapid ion transport layer and the stable layer together to form the semi-solid lithium battery diaphragm. The problems of battery deformation, liquid leakage and even low guarantee and safety performance caused by collision or high temperature in the using process in the prior art are solved, the performance of the semi-solid lithium battery diaphragm is enhanced, and the deformation of the internal structure of the battery is reduced, so that the overall stability of the battery is enhanced, and the service life of the battery is prolonged. Battery short circuit can be effectively prevented, and the battery is protected from being damaged, so that safe use of the battery is ensured.

The utility model provides a system for collecting electroencephalogram signals, which relates to the technical field of electroencephalogram signal collection, and can improve signal range adaptability by arranging a preprocessing module at the front end of a filtering module, so that the signal can be better processed during filtering, and the filtering effect can be enhanced. According to the invention, offset or distortion caused by a direct current component in the filtering process is reduced, the calculated amount can be reduced, the filtering effect is improved, the response time is shortened, and the external power supply is detected in real time by arranging the power supply acquisition module. And the mains supply frequency is sent to the frequency adjustment unit to adjust the center frequency of the digital notch filter, so that the filtering module can better carry out notch filtering on the electroencephalogram signal when the mains supply frequency fluctuates, the influence of power grid fluctuation on the electroencephalogram signal is reduced, and the effect of improving the detection precision is achieved.

The utility model discloses a forklift portal frame applied to an impact working condition, which comprises an inner portal frame, an outer portal frame, a goods blocking frame, a fork arm carrier, an oil cylinder, a roller and a side roller, and the upper end of the outer portal frame is provided with an outer portal frame roller shaft and a threaded hole; the lower end of the inner door frame is provided with an inner door frame roller shaft and a threaded hole; fork arm carrier roller shafts and threaded holes are arranged at the upper end and the lower end of the fork arm carrier, and the threaded holes are used for skid-mounting of side rollers; the roller comprises an outer ring and an inner ring, the inner ring is connected with the outer gantry roller shaft, the inner gantry roller shaft and the fork arm carrier roller shaft, double rows of steel balls and a retainer are arranged between the inner ring and the outer ring, the retainer is used for uniformly separating the plurality of steel balls in each row, and the outer ring and the inner ring are sealed through a sealing piece. The forklift portal frame is simplified in structure and low in cost, the durability of the idler wheels is effectively improved, and the failure rate is reduced. The rigidity is enhanced through an outer wrapping structure, high-position transverse deformation is reduced, and safety is improved. And the fork arm carrier is high in strength and adapts to severe working conditions.

The utility model belongs to the technical field of I-shaped steel welding devices, and particularly relates to a space capsule I-shaped steel welding device which comprises a welding table. First electric push rods are symmetrically installed on the two sides of the welding table, and the output ends of the first electric push rods are fixedly connected with a connecting frame. According to the specific shape of the I-shaped steel, when the two clamping plates are close to and attached to each other, the interiors of the clamping plates are of an I-shaped structure, the interiors of the clamping plates are designed to be I-shaped matched with the I-shaped steel in shape, and the two clamping plates can be pushed by the output ends of the first electric push rods to rapidly clamp and fix the welding nearby areas of the two I-shaped steel; precise alignment of two pieces of I-shaped steel in the welding process is achieved, so that the effect of rapid positioning and fixing is achieved, welding work can be conducted more efficiently, the adjusting time is saved, the production efficiency is improved, when the two clamping plates are close to each other and attached, the matching degree of the internal shape and the I-shaped steel is high, and the welding quality is improved. And damage and deformation to the I-shaped steel can be reduced.

The utility model relates to the technical field of foaming sponge forming, and discloses foaming sponge forming equipment which comprises a peripheral protection frame, a bottom supporting conveying belt is installed at the bottom of the left half portion in the peripheral protection frame, and a side baffle is arranged in the peripheral protection frame. The side baffle, the bottom supporting conveying belt and the left side wall of the peripheral protection frame jointly enclose a foaming sponge forming space, a side baffle recycling mechanism is installed on the right half part in the peripheral protection frame, and a forming guiding-out ramp connected with the right side of the supporting conveying belt is installed at the bottom of the right half part in the peripheral protection frame. A stirring mechanism is installed on the left side wall of the peripheral protection frame. The foamed sponge forming equipment has the advantages of being simple and convenient to operate, improving the production efficiency, reducing the operation difficulty and guaranteeing the production quality in the aspect of leading-out operation after sponge forming. Due to the advantages, the equipment has high competitiveness and wide application prospects in the sponge forming industry, and the requirements of users for efficient and stable production can be met.

The invention relates to the technical field of hybrid welding, in particular to a laser and TIG magnetic control hybrid welding process for a nickel-based alloy pipe production line, which comprises the following steps: pipe manufacturing, preparation, conveying and preheating, welding and cooling, equipment comprises a dust-free welding chamber and a welding pipe, a welding mechanism is arranged in the dust-free welding chamber, and the welding pipe is arranged in the dust-free welding chamber. The welding mechanism comprises a high-frequency pulse TIG welding gun and a laser transmitter, a magnetic field mechanism is arranged in the high-frequency pulse TIG welding gun, and a tungsten electrode end is arranged at the end, away from the adjusting frame, of the high-frequency pulse TIG welding gun. The method has the advantages that optical fiber laser welding is combined with the high-frequency pulse TIG arc and external alternating magnetic field technology, the welding speed is remarkably increased, rapid heating is achieved through optical fiber laser welding, the stirring and mixing effects of a molten pool are enhanced through adding of the high-frequency pulse TIG arc and the alternating magnetic field, the alternating magnetic field stirs the interior of the molten pool, grains are refined, and the overall performance of a welding seam is improved; therefore, thermal stress and deformation of weld metal are reduced, and welding efficiency and quality are improved.

The invention relates to the technical field of aluminum material cutting equipment, and discloses self-adaptive internal stress compensation type rolled aluminum material cutting equipment and a process thereof.The self-adaptive internal stress compensation type rolled aluminum material cutting equipment comprises a base, a plurality of supporting legs are fixedly installed at the bottom end of the base, and the base is placed on the ground through the supporting legs; and the internal stress compensation mechanism is arranged at the top end of the base, an electromagnetic heating ring and a plurality of cooling spray heads are arranged on the internal stress compensation mechanism, the electromagnetic heating ring is used for heating the cutting position of the passing rolled aluminum material, and then the cooling spray heads are used for cooling the position again. The internal stress compensation mechanism is arranged, the cut position of the rolled aluminum plate is firstly heated, liquid nitrogen is sprayed to the cut position to rapidly cool the rolled aluminum plate, opposite thermal stress is generated through rapid cooling and rapid heating to offset residual stress, and local and rapid internal stress compensation is conducted on the cut position of the rolled aluminum plate; the internal stress compensation effect is better, and deformation of a notch during cutting is reduced.

The utility model discloses cable winding equipment which comprises a main body assembly and a winding assembly, the main body assembly comprises a winding frame, a rotating disc and a bottom plate, the rotating disc is inserted into one side of the winding frame and movably connected with the winding frame, the bottom plate is fixed to the bottom of the winding frame, and the winding assembly is arranged on the winding frame and movably connected with the rotating disc. Comprising a winding piece, a driving piece and a reset piece, the winding piece is arranged on one side of the rotating disc, the driving piece is arranged on the winding piece, and the reset piece is located on one side of the winding piece. The tension is accurately controlled, so that the cable or the cable can be prevented from being subjected to too large or too small tension in the coiling process, product damage or deformation is reduced, and the loss rate is reduced.

The positioning tool for machining the silica gel sealing gasket comprises a working table, a positioning mechanism used for positioning materials is installed on the top of the working table, the positioning mechanism comprises a limiting assembly, a pressing assembly and a pressing assembly, the limiting assembly is installed on the top of the working table and used for limiting the materials, and the pressing assembly is installed on the inner side of the working table and used for pressing the materials. Comprising three grooves formed in the top of a workbench at equal intervals, pressing arms are rotationally arranged on the inner sides of the grooves through bearings, and a driving assembly used for driving the pressing arms to press materials is installed on the inner side of the workbench; the utility model relates to the technical field of silica gel sealing gasket processing, and compared with a comparison file, the pressing assembly in the positioning mechanism can ensure tight fit between a material and the pressing arm to improve the sealing performance, in addition, the movement or deformation of the sealing gasket in the processing process can be reduced, and the sealing gasket is prevented from being damaged or losing efficacy.

The invention belongs to the technical field of vehicle engineering target testing, and particularly relates to a method for verifying the height of a vehicle based on a suspension hard point. Reloading a sample piece, refueling a test vehicle, calibrating tire pressure, and carrying out a dynamic inspection test; the hard point height DMU analyzes and obtains theoretical heights of an inner front point of a front lower control arm and an inner point of a rear lower control arm of the test vehicle in the no-load state of the whole vehicle, actually measures and obtains actual heights of the inner front point of the front lower control arm and the inner point of the rear lower control arm of the test vehicle in the no-load state, and calculates and corrects the spring load; and manufacturing a front spiral spring and a rear spiral spring according to the no-load correction value, and obtaining the actual height of the inner front point of the front lower control arm and the inner point of the rear lower control arm of the test vehicle in the no-load state until the actual height is the same as the theoretical height. And the height of the automobile is adjusted by converting the lever ratio of the spring and reversely pushing the no-load load of the spring.

The invention relates to the technical field of compressed air energy storage, in particular to a compressed air energy storage artificial cavern structure under the local soft rock stratum condition and a construction method. A plurality of pipelines are arranged in the soft rock cavern, and the two ends of the pipelines are connected with the steel linings in the hard rock cavern in a sealed mode through the end sealing plates, so that the sealing performance and the gas circulation performance of the gas storage cavern are guaranteed; the high internal pressure is mainly borne by the steel pipe, and the small-proportion internal pressure transmits the internal pressure of the pipeline to surrounding rock through concrete between the pipelines. Compared with a steel lining in a hard rock cavern, a plurality of steel pipes with smaller diameters are arranged in the soft rock cavern, so that the internal pressure load sharing rate of soft surrounding rock is favorably reduced, the deformation of the surrounding rock is reduced, and the structural safety is ensured. According to the scheme, a new design concept is provided for application of the compressed air underground gas storage cavern structure under the condition of the local soft rock stratum, and the flexibility of site selection is improved.

The invention relates to the technical field of ships, and discloses an angle-adjustable flat ground ship moving supporting tool. The angle-adjustable flat ground ship moving supporting tool comprises a supporting part, a fixing rod and an adjusting part. The adjusting part comprises two fixing plates, a rotating groove is formed between the two fixing plates, a plurality of fixing holes are formed in the fixing plates, and the fixing holes are formed in the vertical direction at intervals and penetrate through the rotating groove; the supporting part comprises a supporting plate and a connecting plate, the supporting plate is fixedly connected to the top of the connecting plate and forms a supporting face matched with the outer walls of the head and the tail of the ship, the connecting plate is arranged in the rotating groove and rotationally connected with the fixing plate, a positioning hole is formed in the connecting plate, and the fixing rod can sequentially penetrate through the fixing hole and the positioning hole to fix the connecting plate and the fixing plate. The contact area with the outer wall of the ship is increased through the supporting faces of the supporting parts, the problem of deformation of the steel piers at the head and tail areas of the ship is solved, and safety is improved. The adjusting part can adjust the angle according to the curvature change of the ship to ensure good contact between the supporting surface and the outer wall of the ship and reduce the deformation risk of the steel pier.

The invention relates to the technical field of roadbed filler detection, in particular to a roadbed filler performance indoor detection test method which comprises the following steps: paving a roadbed filler sample on a detection platform for pretreatment; pressurizing the initial-state roadbed filler sample to obtain a stable roadbed filler sample, and recording the pressure change and the surface height change of each layer; evaluating whether the roadbed filler reaches a deformation standard or not according to a detection result; adding equal volume of water into the initial-state roadbed filler sample and the stable-state roadbed filler sample, measuring and recording the water immersion height, judging whether the roadbed filler sample meets the stability standard or not, carrying out simulated filling on the initial-state roadbed filler, carrying out pressurized deformation detection by using a second deformation pressure group, and determining the performance grade of the filler; the second deformation pressure is repeatedly used for detecting the simulated roadbed filler, the filler performance grade is adjusted according to the final deformation quantity, the pressure resistance and deformation characteristics of the filler can be accurately evaluated, and it is ensured that the filler meets the requirements of highways of different grades.

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.

The utility model provides a kind of viscous damper mounting structure, including first mounting beam and second mounting beam, the first mounting beam is equipped with accommodating space, the inboard of accommodating space is equipped with viscous damper, the upper of second mounting beam is provided with first embedded part, the bottom of first embedded part is fixedly installed with fixed frame.The utility model is through the setting of first connecting rod, mounting sleeve, second connecting plate and connecting mechanism, when using, the cylinder barrel of viscous damper and fixed frame branch can be movably connected, the movable connection of both can also realize the movable connection of cylinder barrel of viscous damper and mounting beam, allow cylinder barrel to be multi-directional displacement with building structure in earthquake and not be restrained, while avoiding that cylinder barrel bears too large bending moment and torque, reduce the problem that cylinder barrel appears deformation or damage, to effectively guarantee the performance and durability of viscous damper.

This invention discloses a method for measuring the grounding resistance of transmission towers based on multi-circuit high-frequency synchronous excitation, belonging to the field of power equipment testing and grounding resistance measurement technology. The method is implemented using a multi-circuit high-frequency signal excitation transmission device. First, a multi-circuit measurement calibration parameter library is established, a non-contact coupling unit is installed and the measurement parameters are initialized, then multiple synchronous high-frequency excitation signals are generated, amplified and dynamically impedance matched, and then non-contactly coupled to the grounding down conductor. Subsequently, multiple feedback signals are synchronously acquired and signal characteristics are extracted. Based on the feedback signals, multi-circuit synchronous closed-loop calibration is performed, the grounding impedance and grounding resistance measurements of each circuit are calculated, and anomalies are eliminated and weighted fusion is performed on the multiple measurement values ​​to obtain the final grounding resistance value. This invention eliminates the need to split the grounding down conductor, improving measurement efficiency, synchronization stability, and anti-interference capability.

The utility model discloses a corrugated case convenient to carry, including corrugated case body, the lower end fixed mounting of corrugated case body has supported device, the upper end of corrugated case body inserts and installs corrugated box lid. The utility model discloses a corrugated case convenient to carry, through still being provided with corrugated core in the corrugated case body, double -decked corrugated paperboard can provide double -decked support, and the compressive strength and the side pressure intensity not only are significantly higher than single corrugated paperboard, and double -decked structure also can reduce the deformation caused by humidity change, and further improve the use effect and service life of corrugated case, and the one side board on the corrugated box lid can be bent down, and the clamping block on the one side board can be inserted into the first slot and the second slot, avoid the corrugated case body when transporting external dust can enter its through the slot, in addition, through the pull -plate and raise the one side board, at this time, people can conveniently take up and carry the corrugated case body through the slot.

The application discloses a groove cutter for machining a turbocharger shell annular groove and a turbocharger shell, the groove cutter comprising a first cutter body, a second cutter body and a cutting edge. The stable clamping of the first cutter body lays a foundation for machining precision, avoiding machining errors caused by clamping deviation; the design of the chip removal angle A and the support angle B of the second cutter body not only solves the problem of chip removal, but also enhances the strength of the groove cutter, reduces cutting heat and groove cutter deformation; the cutting edge comprises a straight edge section and a semicircular edge, which controls the cutting contact area, reduces the cutting force and vibration, and protects the edge. The joint action of these designs not only makes the machining precision of the annular groove meet the assembly and use requirements of the shell, but also improves the service life of the groove cutter, reduces the number and time of tool replacement, reduces the machining cost, improves the overall machining efficiency, and fully meets the batch production requirements of the new energy automobile turbocharger shell.

This utility model discloses a self-locking intermediate tensioning device for installing bridge housing parts, relating to the technical field of workpiece processing auxiliary devices. It includes a worktable, fixed seats, a fixed frame, fixed plates, a tensioning mechanism, and a fixing mechanism. Two symmetrically distributed fixed seats are fixedly connected to the upper surface of the worktable, and a fixed frame is fixedly connected between the two fixed seats. Two symmetrically distributed fixed plates are fixedly connected to the inner end face of the fixed frame. The fixed plates are fixedly connected to the upper surface of the worktable, and a tensioning mechanism is provided between the two fixed plates. The tensioning mechanism includes a hydraulic cylinder, a wedge-shaped tensioning plate, a moving block, and a central tensioning plate. This utility model features a tensioning mechanism where the hydraulic cylinder drives the wedge-shaped tensioning plate. Through the guidance of the T-shaped groove and the T-shaped plate, the vertical movement is converted into the horizontal expansion of the moving block and the central tensioning plate, thereby applying an adjustable tensioning force to the inner hole of the workpiece. This effectively ensures the dimensional stability and accuracy of the workpiece during subsequent processing such as press-fitting.

The utility model discloses a reinforcing device for an underneath pass railway turnout zone. The reinforcing device comprises a supporting and splicing assembly, a bottom plate arranged on the supporting and splicing assembly, a lower guide beam installed on the top of the bottom plate and main lower beams symmetrically distributed. The utility model has the beneficial effects that through the supporting and splicing assembly, a stable foundation is provided for the whole device, and soil pressure and vehicle load transmitted from the side surface and the top can be effectively supported; the stability is further enhanced through structures such as a lower guide beam, a main lower beam, a guide beam stand column and a main beam stand column, and the shield top plate and all components work cooperatively, so that the complex stress condition of a railway turnout zone can be better dealt with; the steel structure sub-shield is combined with the reinforced concrete lattice, and the steel structure sub-shield and the reinforced concrete lattice are integrally poured with the frame main body, so that the overall strength and stability of the structure are greatly improved; the rigidity of the reinforced concrete lattice is increased, the reinforced concrete lattice and the frame body form a whole, large external loads can be borne, and the requirement for strict settlement control of a railway turnout zone is met.