230results about How to "Guaranteed neutrality" patented technology

The invention belongs to the material test technical field, to be more exactly, relates to a fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and an usage method thereof, which solves the problems of high temperature irresistance, high pressure irresistance, aqueous corrosion, large screw thread slit and poor centering in the current sample clamp. The clamp is provided with a column, a platform, an upper press cap, a lower press cap and a conversion adapter; the lower part of the column of the clamp is fixed on a cover of anautoclave, the upper part of the column of the clamp is fixed on the platform, and respectively and tightly pressed by lock nuts, the lower part of the conversion adapter is connected with a stretching shaft of a fatigue machine, through elevating the stretching shaft, an upper convex plate and a lower convex plate of the test sample are respectively placed in a platform groove and a conversion adapter groove, two dimidiate semirings are pressed on upper convex plate and the lower convex plate of the test sample, the upper press cap and the lower press cap are sleeved, the press cap bolts arescrewed for fixing two ends. The fatigue test sample clamp can be used in the autoclave for carrying out various fatigue tests (stress-stress, stress-tension, tension-tension and the like) under the high temperature high pressure solution environment, and has the advantages of simple structure and low cost.

The invention provides a laser splice welding system for high-strength steel structure thin plates. The laser splice welding system comprises a welding portal frame and the like. A fixed pressing device, a movable pressing device and a welding platform are all located below the welding portal frame. The fixed pressing device and the movable pressing device are located on the two sides of the workpiece welding platform correspondingly. A transversely-moving trolley is arranged on the welding portal frame, a robot level laser composite welding system is fixed to the position below the transversely-moving trolley, and a workpiece transferring device is located on the side faces of a front welding material frame and a rear welding material frame. The welding portal frame is sleeved with a laser protective door, and the front welding material frame and the rear welding material frame are located below one side of the fixed pressing device. According to the laser splice welding system for the high-strength steel structure thin plates, the diversified welding methods such as self-fusible welding, laser filler wire welding and laser electric-arc hybrid welding can be achieved, automatic locating can be conducted before welding; and in the welding process, real-time tracing of welding joints can be achieved, the welding technological parameters are adjusted in real time according to slope gap and misalignment changing, and self-adaptation filling of welding wires is achieved. According to the laser splice welding system, teaching programming is easy, and operating is convenient.

The invention discloses a high-speed rail train aluminum profile which comprises the following metals in percentage by mass: 0.1-0.2% of Cu, 0.20-0.40% of Mn, 1.0-2.0% of Mg, 0.1-0.3% of Cr, 4.0-6.0% of Zn, 0.1-0.2% of Zr, at most 0.10% of Ti, at most 0.30% of Fe, at most 0.35% of Si, at most 0.1% of V, at most 0.15% of all impurities, and the balance of Al. The invention also discloses a preparation method of the high-speed rail train aluminum profile. The high-speed rail train aluminum profile has obvious higher yield strength, tensile strength, elongation percentage and the like than the existing aluminum alloy.

The invention relates to an impact loading mechanism comprising two sets of bracket arms, two bracket arm splints, an installation barrel, a seal cover, two sets of thrust force bearings, two sets of movable loading cones, a threaded sleeve, a spline shaft, two flange splines, two loading arms, two rod end joint ball bearings, two support columns, two impact loading rods and a joint ball bearing.The impact loading mechanism can convert the torque of the load input end of the spline shaft into the thrust force of the movable loading cones and apply the thrust force of the movable loading cones to the impact loading rods, and the impact loading mechanism can directly apply the thrust force or pull force of the load input end of the spline shaft to the impact loading rods through the first loading arm. Because mobile blocks on the movable loading cones can be movable or static, the distance between two loading points on a single impact loading rod can change along with time or keep unchanged. Thus, the dynamic synchronous multi-point movement simulation impact loading of the impact loading rods can be realized, and random dynamic or static shearing force and torque can be obtained at the roots of the impact loading rods.

The invention discloses a tilting-type roller polisher machine. The roller (4) of the polisher machine is spliced by steel plates in different thicknesses. A feed port (8) is arranged at one end of the roller (4) while the other end opposite to the feed port (8) is driven by a rotary force to rotate automatically. The angles of depression and elevation of the roller (4) driven by a tilting force are adjusted. The roller provided by the invention is an open roller without a lining spliced by steel plates in different thicknesses so that the high temperature-resisting and wear-resisting properties of the roller are improved. As the roller provided by the invention is an open structure, the roller will not produce high pressure and high temperature steam during work so that the roller can be directly overturned to pour out the workpiece and grinding materials in the unloading process without problem of high pressure and high temperature steam jet produced to scald personnel or pollute the work site and ambient environment.

The invention discloses a full-automatic box plate and screw welding device for an anchoring box. The full-automatic box plate and screw welding device comprises a box plate and finished product synchronous-transfer mechanism, a screw feeding mechanism, a stud welding mechanism and a finished product delivery mechanism, wherein the box plate and finished product synchronous-transfer mechanism comprises a material tray positioning rack, a sucking disc material-taking device and a box plate storage plate, the sucking disc material-taking device comprises left and right electromagnetic sucking discs arranged side by side, and the two electromagnetic sucking discs are connected together through a sucking disc supporting frame. The screw feeding mechanism comprises a screw storage pallet and a screw taking manipulator. The stud welding mechanism comprises a base, a welding bearing frame, a welding bearing plate, a metal chuck, a stud welding machine and a ceramic ring compression piece. Compared with the prior art, the full-automatic box plate and screw welding device has the following advantages that automatic feeding, automatic welding and automatic delivery are integrated, the welding quality and production efficiency are greatly improved, and the welding device is ingenious in structural design, compact in layout and suitable for popularization and usage.

The invention discloses a disc-type rod fastening rotor structure for a heavy-duty gas turbine, which comprises multistage compressor wheel discs in a compressor section, wherein the compressor wheel discs are connected and the compressor wheel discs and a middle combustion chamber section are connected through axial twist transmission pins; all stages of compressor wheel discs and the middle combustion chamber section are connected into a whole through central draw rods; the middle combustion section is connected with multistage turbine wheel discs in a turbine section; all stages of turbine wheel discs and the middle combustion chamber section are connected into a whole through prestressed circumferential draw rods; all stages of turbine wheel discs are engaged and the turbine wheel discs and the middle combustion chamber section are engaged through face teeth; therefore, the coaxiality of all stages of compressor wheel discs and the middle combustion chamber section and the coaxiality of all stages of turbine wheel discs and the middle combustion chamber section are guaranteed so as to guarantee the integral centrality of a rotor. The structure has the advantages of high centrality and high assembling efficiency.

The invention discloses a tension setting method for a vertical continuous annealing furnace. The tension setting method comprises the following steps of: setting the minimum critical buckling stressSigma Alpha of the vertical continuous annealing furnace; setting the minimum unit tension T0 for preventing running deflection of the vertical continuous annealing furnace; setting the basic unit tension T2 inside the vertical continuous annealing furnace; setting the tension T3 of each region inside the vertical continuous annealing furnace; setting the tension speed factor of the vertical continuous annealing furnace to make sure that the optimized basic unit tension T4=T3+(sigma*alpha*pi / 180)*v^2; and applying the optimized basic unit tension T4 to each region of the vertical continuous annealing furnace according to a tension characteristic curve. The tension setting method for the vertical continuous annealing furnace disclosed by the invention solves the technical problem that running deflection of band steel inside the vertical continuous annealing furnace is easily caused in the prior art, and thus the band steel can stably run inside the vertical continuous annealing furnace.

The invention provides a downloadable and replaceable condition receiving system which comprises a safety data management platform, a transmitting end and a receiving end, wherein the transmitting end comprises a transmitting end root key generating module, and is used for receiving a first intermediate key SCKv transmitted by the safety data management platform and a second intermediate key Seedv provided by a chip manufacturer, and generating a root key according to a root key deriving mechanism provided by the chip manufacturer, the SCKv and the Seedv; the receiving end comprises an OTP (one time programmable) region and a receiving end root key generating module, the OTP region is used for reducing a safety key SCK according to an ESCK reducing mechanism written on the OTP region in a burning manner and provided by the chip manufacturer, and an encryption safety key ESCK and a chip identifier Chip IF provided by the safety data management platform when a system is electrified, and transmitting the safety key SCK to the receiving end root key generating module; and the receiving end root key generating module is used for generating the root key according to a preset mechanism, a chip mask key SMK provided by the chip manufacturer, the SCK, and a derived identifier Vendor-Sys ID provided with a condition receiving manufacturer.

The invention relates to a dynamic vibration-absorption turning tool based on an extruding working mode of magnetorheological fluid. The dynamic vibration-absorption turning tool comprises a main vibration component and a magnetorheological dynamic vibration-absorption component, wherein the main vibration component is fixedly connected with a normal turning tool, and the magnetorheological dynamic vibration-absorption component is hung on the normal turning tool. The dynamic vibration-absorption turning tool is characterized in that the main vibration component and the magnetorheological dynamic vibration-absorption component are supported and connected by virtue of the magnetorheological fluid and roll balls, wherein the rigidity and damp of the magnetorheological can be changed under a magnetic field, the roll balls are mounted on key slots in two sides of a cutter bar shaft of the main vibration component, and the magnetorheological fluid is filled in a round disc magnetic pole, upper tank body, lower tank body and end cover of the magnetorheological dynamic vibration-absorption component as well as an axial gap between first and second disc-shaped iron cores of the main vibration component. According to the dynamic vibration-absorption turning tool, the magnetorheological fluid is used as a regulating-executing medium, and the parameters such as the damp and inherent frequency of the magnetorheological dynamic vibration-absorption component are changed in real-time and online manners by regulating the magnetic induction intensity aiming at vibration frequencies under different turning working conditions, so that the vibration energy in the turning tool of a main vibration system is maximally absorbed, and the turning vibration is effectively restrained.

The invention provides a single-rail crane for a belt conveyor overhead automatic inspection system. The single-rail crane mainly consists of two sliding frames and a tensioning device, wherein the two sliding frames are symmetrically arranged in an I-shaped steel guide rail groove, a centering mechanism and a rail cleaning device are symmetrically arranged on a support plate of the sliding frames, the intensity of the tensioning force of the tensioning device can be regulated through a screw bolt regulating mechanism, and the centering mechanism can ensure the centering effect through regulating the deformation quantity of the centering wheel, so that the anti-deflection performance of the single-rail crane is ensured; the rail sweeping device can realize the cleaning on sundries on the rail surface used for carrying the single-rail crane, and the anti-jamming cavity of the single-rail crane can be enhanced. The single-rail crane provided by the invention is applicable to an overhead automatic routing inspection system of coal mine transportation, and is particularly applicable to the overhead automatic routing inspection system of a belt roadway of a belt conveyor. The single-rail crane has the advantages that the structure is compact, safety and high efficiency are realized, and meanwhile, the single-rail crane has higher stability and reliability.

The invention discloses a high-speed arecanut slicing device comprising a conveying centering system, a cutting system and an automatic feeding system. The conveying centering system and the cutting system are fixedly arranged on a machine seat. The automatic feeding system adds materials into the conveying centering system. The conveying centering system comprises a motor, a small belt pulley, alarge belt pulley and a horizontal conveying belt in coaxial transmission with the large belt pulley. The horizontal conveying belt is provided with at least five material clamping grooves at equal intervals, and flow guide plates matched with the material clamping grooves to achieve conveying centering of materials. The flow guide plates are provided with flow limiting groove outlets. Zigzag cutters of the cutting system are separated through locating sleeves and are fixedly connected with a cutter rotary shaft. The invention further provides a high-speed arecanut slicing method. Arecanuts pass the high-speed arecanut slicing device one by one through the flow guide plates, the arecanuts are clamped by the material clamping grooves in a combined mode so as to ensure centering, additionalclamping is not needed, meanwhile, all the zigzag cutters are fixedly connected to the cutter rotary shaft through the locating sleeves, the arecanuts are sliced at the same high angular speed, thus slicing further achieves centering, and slicing efficiency is improved greatly.

The invention discloses a poppet valve fixing type gas flow adjusting device of a solid rocket ramjet. A combustion chamber is connected with a cylindrical hollow valve rod, a poppet valve is connected with the hollow valve rod in a fastened manner through a groove, and two opposite spray pipe holes are formed in the positions, close to the end face, of a cylindrical structure; partial external threads are formed the periphery of a movable spray pipe, the partial external threads are meshed with the internal threads of a fixed base, and three sealing ring grooves are formed in the inner edge of the movable spray pipe; and a stepping motor is fixed below the fixed base through a motor connecting plate, a straight gear is installed on the shaft of the stepping motor through a key, the gear is meshed with a big gear, the big gear and the movable spray pipe are fastened to form a whole, and the spray pipe moves in the direction of the central axis of the fixed base. The poppet valve fixing type gas flow adjusting device of the solid rocket ramjet is simple in structure, accurate to control, reliable in work and low in cost, and is good in realizability.

A one-way pressure regulating overflow valve with a thrust bearing comprises a lower valve body, an overflow valve seat, an overflow valve spring, a valve rod, a lower flange, a bend, a spacer bush, a one-way valve seat, a one-way valve element, a one-way valve spring, a compression ring, a lining, a guiding sleeve, a lower spring base, a disc spring, an upper spring base, the thrust bearing, a lock nut, an adjusting bolt, a gland, an upper valve body, a locking nut, a round nut and a Y-shaped sealing ring. According to the one-way pressure regulating overflow valve, the liquid collection type overflow manner is adopted, the field work environment is changed, and meanwhile resources are saved; the independent overflow valve seat and the independent one-way valve seat are easy to machine, maintain and replace; the disc spring with the large rigidity and variable rigidity is used, and therefore flow different in pressure in the system can be accurately controlled; the stroke is short, the load is large, the axial occupied space is small, and combined usage is convenient; and the one-way pressure regulating overflow valve serves as a mechanical load for overcoming the medium pressure, the one-way pressure regulating overflow valve is suitable for a structure with the wide load range and more suitable for a high-pressure structure, the valve is opened and closed in time, a valve element is not prone to frequent adjustment or vibration, and dismounting, mounting and replacing are easy.

The invention discloses a fatigue-resistant corrosion-resistant aluminum profile for an automobile. The aluminum profile comprises the following metals in parts by weight: 90 parts of Al, 0.1-0.2 part of Cu, 0.20-0.40 part of Mn, 1.0-2.0 parts of Mg, 0.1-0.3 part of Cr, 4.0-6.0 parts of Zn, 0.1-0.2 part of Zr and 0.1-1 part of V. The invention further discloses a related preparation process. The prepared aluminum profile has the advantages of fatigue resistance and corrosion resistance; and compared with the conventional aluminum profile, the aluminum profile disclosed by the invention has high yield strength and tensile strength and has wide application prospects in the automobile.

The invention provides a novel V-B consistometer which can effectively ensure higher centering property and universality between a feed opening and an axial line of a container as well as a measuring rod and the axial line of the container. The novel V-B consistometer comprises a slump cone, wherein the slump cone is arranged in the container; the container is arranged on an upper seat; the upper seat is installed on a base; a feed inlet is buckled at the upper part of the slump cone; an upright post is fixed on the base through bolts; a rotating frame is installed at the top of the upright post; the measuring rod is installed at the transverse end part of the rotating frame; a transparent disk and a balance weight are installed at the lower part of the measuring rod; and the balance weight is installed at the lower part of the transparent disk. The invention is characterized in that the rotating frame is installed at the top of the upright post through fixed screws, and a horizontal fixed rod of the feed inlet is connected with the upright post through the fixed screws.

The invention discloses a fixture for testing the superhigh-temperature tensile property of a conductor material and a clamping method, and belongs to the technical field of mechanical clamping. A first bolt and a central hole of a first connecting head are insulated from each other, the head end of the first bolt and the first connecting head are insulated from each other, a first connecting block is arranged in the first connecting head, the first connecting block is connected with the first connecting head through a first pin, and the first connecting block is connected with a second connecting head; a second connecting block is arranged in the second connecting head, and the second connecting block is connected with the second connecting head through a second pin; an upper stretching connecting head is connected with an inner threaded hole of the water cooling clamp head body of an upper water cooling clamp head through a threaded column of the second connecting block; four water cooling pipes communicated with an annular sealed cavity of the water cooling clamp head body are fixed to the periphery of the water cooling clamp head body; a metal locating disc is arranged in a shaft connecting sleeve, detachably connected with the shaft connecting sleeve, insulated from the shaft connecting sleeve and connected with a lower water cooling clamp head. The fixture is used for testing the superhigh-temperature tensile property of the conductor material.

The invention discloses a side direction hydraulic pressure calibration adjustable support of a vertical type six-component test bed. The side direction hydraulic pressure calibration adjustable support of the vertical type six-component test bed comprises a height adjusting plate, adjusting welded rods, threaded sleeves, bolts, an inner thread tapered pin, a first bolt, a first spring washer, a base plate, stand columns, a panel, a second bolt and a second spring washer. Second thread via holes are formed in four corners of the height adjusting plate, and the height adjusting plate is fixed on a test bed fixed frame through the second bolt and the second spring washer. A first thread via through is formed in the base plate, and the base plate is fixed on the center of the height adjusting plate through the first bolt and the first spring washer. The threaded sleeves are respectively arranged on two sides of the base plate, and installed on the height adjusting plate through the bolts, and the adjusting welded rods are matched with the threaded sleeves, and adjust the position of the base plate on the height adjusting plate. The four stand columns are welded on the base plate, and the panel is welded on the stand columns and parallel to the base plate. According to the side direction hydraulic pressure calibration adjustable support of the vertical type six-component test bed, position adjustment of a hydraulic system can be finished well, and centering of flexibility pieces and sensors in the process of calibration and working is guaranteed.

The invention relates to a fan strip label shaping and shearing device, which has the advantages of simple structure, convenient use, one-step shaping and the like. The device comprises a female die and a male die, wherein contours of the two dies are consistent with the peripheral shape of a shaped label; a fit clearance is reserved between the two dies; the male die is connected with a datum plate; the shearing device is arranged on the datum plate; the datum plate is arranged on a guiding device; the male die is matched with a discharging plate; the discharging plate is connected with the datum plate; and a resetting device is arranged between the discharging plate and the datum plate.

The invention provides a pipe pile-anchor rod composite foundation capable of bearing pulling and pressing bidirectional loads and a construction technology of the pipe pile-anchor rod composite foundation. The pipe pile-anchor rod composite foundation comprises a pipe pile and an anchor rod. An anchoring hole is reserved in a foundation bottom plate of a building structure, and a stretching end anchorage device is pre-buried in the anchoring hole. The anchor rod is composed of an anchor cable and a prefabricated anchor head, and the prefabricated anchor head is buried in soil below the foundation bottom plate. The upper end of the anchor cable penetrates out of the pipe pile to stretch into the anchoring hole, and is locked by the stretching end anchorage device after being stretched. The pipe pile is supported between the foundation bottom plate and the prefabricated anchor head, and the lower end of the pipe pile is fixedly connected with the upper end of the prefabricated anchor head. In the pipe pile-anchor rod composite foundation, the prefabricated anchor head is additionally arranged at the lower end of the pipe pile so that the pressure resisting bearing capacity of the pipe pile can be improved; a waterproof curtain is formed by the pipe pile with the two closed ends, the erosion effect of underground water and the like on concrete and steel can be resisted, and the impermeability and durability of the anchor rod, the pipe pile and foundation bottom plate joints can be improved; and structural reliability and stress performance are ensured, meanwhile, project quality can be effectively improved, the construction period can be shortened, and the investment can be saved.

The invention provides a combined valve. The combined valve can be free of leakage for a long time under severe working conditions. The combined valve comprises a combined valve body, wherein a medium inlet and a ball valve cavity communicated with the medium inlet are formed in one side of the combined valve body, a medium outlet and a stop valve cavity communicated with the medium outlet are formed in the other side of the combined valve body, the ball valve cavity is communicated with the stop valve cavity, a stop valve element arranged in the stop valve cavity a is connected with stop valve rod, a handle is connected to one end of the stop valve rod, a ball valve ball body arranged in the ball valve cavity is connected with a ball valve rod, the ball valve rod is connected with an output shaft at one end of a speed reduction mechanism, the other end of the speed reduction mechanism is connected with a driving gear for driving the speed reduction mechanism to rotate, the driving gear is meshed with a transition gear, and the stop valve rod drives the transition gear to rotate. The combined valve is integrally designed, has few leakage points, and is more reliable in pipeline installation, and more convenient to operate.

The invention discloses an external taper measuring apparatus, comprising a bracket and an isosceles trapezoid measuring plate with a round head support point. The bracket is formed in such a way that two support plates which have the same structure and are simultaneously formed are horizontally connected by a connection rod at intervals; the two support plates are vertically arranged, the bottom edge of the support plate is a reversed V-shaped support groove, a slot of the measuring plate is arranged above a top point of a reversed V-shaped angle of the support groove, the slot of the measuring plate reversely extends from the top point of the reversed V-shaped angle of the support groove to an angular bisector of the angle, the measuring plate is arranged in the slot, the width of the slot is matched with the thickness of the measuring plate; two waist edges of the measuring plate are respectively a plane-type measuring surface and a standard surface that are simultaneously processed and formed. The invention can effectively prevent the measuring plate from rolling over, keep the precision of centering and ensure the precision of measuring; the standard surface contacts a conical surface bus of a roller by 100%, being measured at any points, so that the invention can be used conveniently. The external taper measuring apparatus is particularly suitable for measuring the external taper of large supporting rollers.

The invention relates to a semi-active turning flutter magneto-rheological damping device based on an extrusion operation mode. The damping device comprises a fixed magnetic pole component and a vibrated magnetic pole component, wherein an end cover in the fixed magnetic pole component is fixedly connected with a box body; two fixed magnetic pole plates are connected with the end cover and a cylindrical hole in the inner side of the box body in an interference fit manner respectively; a dabber in the vibrated magnetic pole component is matched and connected with a homemade lathe tool through a Morse's cone; the space between the end cover and the box body is filled with a magnetorheological fluid; two disk-shaped iron cores are placed in the space between the end cover and the box body, and are connected with the dabber in an interference fit manner; and magnet exciting coils wind cylindrical skeletons of the disk-shaped iron cores. By the adoption of the characteristics that the magnetorheological fluid is fast in response under an external magnetic field, and different damping forces can be provided in transformation from liquid to solid, and on-line continuous real-time control of power parameters (damping, stiffness and the like) of a lathe saddle system is realized; and the damping device is mounted on a lathe sliding box, so that the adjustment is convenient, and flutter in cylindrical turning can be effectively inhibited.

The invention relates to a digital microscope wear scar measurement device and belongs to the field of four-ball friction testing machine detecting equipment. The digital microscope wear scar measurement device comprises a bottom plate seat, a supporting beam, a fine thread supporting rod, a working platform, a digital microscope and a cylinder oil box base, wherein the bottom plate seat is composed of a seat body and a bottom plate, and the working platform is matched with the bottom plate in a sliding manner and provided with a sliding limiting block; the cylinder oil box base is arranged on the working platform in a manner that the axial lead of the cylinder oil box base has an included angle of 54 degrees with the working platform; the fine thread supporting rod is fixedly connected with the seat body, and the lifting of the supporting beam is adjusted relative to the fine thread supporting rod through an embedded nut of the supporting beam; two strong magnet pieces are arranged in two counter bores in one side in the supporting beam; the optical axis of the digital microscope has an included angle of 36 degrees with the axis of the cylinder oil box base, and the digital microscope is vertically connected to a connecting arm of the supporting beam. The digital microscope wear scar measurement device ensures the accurate centering and high-precision fine-tuning focal length of the working platform and provides quick and accurate observation and measurement for the wear scar detection of four-ball friction testing machines.

A bonding intensity testing method of a stainless steel back pipe and a high-purity copper targeted material comprises the following steps: processing a coating surface of an outer threaded stainlesssteel back pipe to form a flat surface; deoiling and washing the outer threaded stainless steel back pipe; blasting sand on the coating surface; cleaning and preheating the coating surface; setting the coating technology parameters; coating the coating surface with high-purity copper powder to form a high-purity copper coating, thus obtaining a stainless steel back pipe coating part; arranging a V-shaped slot stretching clamp as a bonding intensity testing tool and preparing solid glue as an adhesive, and then preparing a sample group that a blank sample mating plate is adhered to a mating plate; synchronously manufacturing two groups of testing samples that the coupling plates are adhered to the stainless steel back pipe coating part; fastening by using a torsional wrench to improve the adhering of the coupling plates and the stainless steel back pipe coating part; testing the bonding intensity of the testing samples through an electronic universal testing machine. With the adoption of the method, the bonding intensity of the stainless steel back pipe and the high-purity copper targeted material can be accurately tested.

The invention provides an assisting device for stretching test of a fastener entity and a testing method thereof. The device comprises a pair of device bodies, an upper connecting part and a lower connecting part, wherein each device body comprises a connecting rod and a connector; each connecting rod is fixed to one end of the corresponding connector; a dismounting and mounting hole is formed in the side surface of each connector; a threaded hole is formed in the surface of one end, far away from corresponding connecting rod, of each connector; each upper connecting part is of a disc structure of which the center is provided with a through hole and the outside diameter is provided with outer threads; each lower connecting part is of a disc structure of which the center is provided with a threaded hole and the outside diameter is provided with outer threads; the thread end of the fastener passes through the through hole in each upper connecting part in an upper connecting device and then is screwed into the threaded hole in each lower connecting part of a lower connecting device. According to the device for performing the stretching test on the fastener entity, the centering performance in the test process is ensured, and moreover, the mounting space of the fastener is big, so that the operation is simple; in addition, the fastener cannot splash in case of breaking, so that the safety is high.

The invention discloses an automatic deviation rectifying device for a hydraulic drill. The automatic deviation rectifying device for the hydraulic drill comprises an inner rod, an outer sleeve, a hydraulic system and a Bluetooth module; and the inner rod comprises a specially-made inner rod body and a drill pipe adapter, the specially-made inner rod body is hollow and is connected with the drillpipe adapter, an eccentric annular groove is dug in the specially-made inner rod body, and a rod part of which one end is provided with a cylinder is embedded into the groove. According to the automatic deviation rectifying device for the hydraulic drill, the deviation rectifying force is provided by a hydraulic device, micro hydraulic cylinders are arranged on the circumference in the four directions respectively, and the centering property of a drill pipe column is guaranteed after deviation rectifying; and in addition, deviation rectifying control is conducted by adopting a Bluetooth data transmission mode, therefore, deviation rectifying operation can be quickly and efficiently achieved, and operation is greatly convenient for coal underground working personnel.

The invention discloses a bearing clamp for a nanometer stretching instrument and a related experimental method, and belongs to the technical field of micro-scale mechanical property testing. The bearing clamp is composed of an upper clamping head, a lower clamping head, adjusting nuts, lead screws, guide rail grooves, limiting grooves, pins, carrier pieces and sample grooves. The lead screws areconnected with the carrier pieces correspondingly, the carrier pieces are controlled to move up and down through the adjusting nuts, and meanwhile, the lead screws and the adjusting nuts achieve self-locking. The sample grooves are formed on the corresponding carrier pieces for placing experimental materials; and the carrier pieces can move up and down along the guide rail grooves. The limiting grooves ensure the centering performance of the upper clamping head and the lower clamping head and the upper and lower clamping heads can be fixed through the pins. The bearing clamp can realize fixation of brittle biological materials such as honeybee veins, honeybee needles and plant fibers, so that damage to the experimental materials due to slight shaking in the clamping process is avoided, theclamping process is simplified, the experimental efficiency is improved, meanwhile, the centering performance of the experimental materials in the clamping process can be guaranteed, and the accuracyof experimental data is improved.

The invention discloses a universal financial system for protecting commercial confidentiality. The universal financial system comprises a user module, a business system module, a plurality of loan institution modules and a joint calculation module, the user module generates a key pair and sends the public key and the user ID to the service system module; the business system module sends the public key and the user ID to the loan institution module; the loan institution module homomorphic encrypts the inquired loan amount of the user to obtain first amount encryption information, and sends thefirst amount encryption information, the user ID and the public key to the joint calculation module; the joint calculation module performs homomorphic encryption on the plurality of parts of first amount encryption information to obtain second amount encryption information and sends the second amount encryption information to the service system module; the business system module sends the secondamount of encrypted information to the user module; and the user module decrypts the second amount encryption information to obtain a total loan amount. According to the universal financial system forprotecting the commercial confidentiality, the total amount of loans of a user in a plurality of loan institutions is inquired through a homomorphic encryption algorithm.