293results about How to "Closely connected" patented technology

The invention discloses a phase change heat exchanger thermoelectric generation device, which belongs to the technical field of energy saving. In the phase change heat exchanger thermoelectric generation device, semiconductor thermoelectric generation chips connected in series or in parallel are arranged between the outer circular surface of a phase change heat exchanger and the inner circular surfaces of finned radiators; high-thermal conductivity silica gel is coated on the low-temperature surfaces and high-temperature surfaces of the semiconductor thermoelectric generation chips; a heat-preservation material is filled into other gaps between the phase change heat exchanger and the finned radiators; a phase change energy storage material is sealed in phase change energy storage material containing cavities of the phase change heat exchanger; and the finned radiators I and II in the finned radiators are connected by connecting parts. The phase change heat exchanger thermoelectric generation device utilizes a temperature difference between a high-temperature waste gas and the outside, fully utilizes the energy of the waste gas by phase change energy storage and thermoelectric generation technologies, and converts the energy into electric energy. The phase change heat exchanger thermoelectric generation device ensures high afterheat utilization rate and high generation efficiency, is simply structured and convenient to arrange, and can be widely used for recycling the afterheat of the waste gas of a boiler, the high-temperature tail gas of an automobile, and the like.

The invention provides a sulfur-doped nickel phosphide catalyst for hydrogen evolution reaction and a preparation method thereof. The preparation method includes the steps that A, a nickel source, an ammonium source, urea and water are mixed, and ultrasonic and stirring dispersion are conducted to obtain a first compound carrier; B, the first compound carrier is reacted on a supporting body to obtain a second compound carrier; and C, a nickel phosphide catalyst with the hydrogen being precipitated is obtained through reaction of the second compound carrier, a phosphate source and a sulfur source. According to the method, firstly a nickel hydroxide first compound carrier is obtained through reaction of the nickel source, the ammonium source, the urea and the water, and then the first compound carrier grows on the supporting body to obtain the second compound carrier; after that, a sulfur-doped nickel phosphide catalyst is obtained through simultaneous reaction of the second compound carrier, the nickel source and the sulfur source. According to the preparation method, the catalyst grows on a current collector directly, so that the current collector is more tightly connected with the catalyst, an adhesive agent is not needed, the cost is saved, the electrical conductivity is increased, so that the electric charge transfer is rapider, and high catalytic activity and high stability are achieved on the hydrogen evolution reaction.

The invention discloses a copper/ graphene composite multi-layer heat dissipation film and a preparation method thereof. The heat dissipation film is formed by alternately superposing a graphene layer and a copper layer. The preparation method mainly comprises the following steps: sequentially coating a graphene film and copper on a metal matrix; and finally, dissolving the metal matrix to obtain the self-supported copper/ graphene composite multi-layer heat dissipation film. The heat dissipation film prepared by the method is high in heat dissipation efficiency, and is convenient to use.

The invention relates to a sampling apparatus, in particular to a high-efficiency soil sampling apparatus for environmental detection. The invention aims at providing a high-efficiency soil sampling apparatus for environmental detection which is simple in sampling operation, time-saving, labor-saving, high in sampling efficiency and capable of obtaining deep soil. In order to solve the technical problem, the invention provides the high-efficiency soil sampling apparatus for the environmental detection. The high-efficiency soil sampling apparatus comprises a transverse plate, supporting rods, a nut, a screw rod, a drill bit, a guide sleeve, a pressure plate, a first spring, a fixed plate, a handle, a guide rod, a connecting rod and a shovel; the left side and the right side of the bottom of the transverse plate are respectively provided with the supporting rod, the nut is arranged in the middle of the bottom of the transverse plate, the nut is internally provided with the screw rod, the screw rod is matched with the nut, the top of the screw rod is provided with a fixed plate, the right side of the top of the fixed plate is provided with the handle, and a guide hole is formed in the middle of the fixed plate. The high-efficiency soil sampling apparatus samples the soil in a manner of manually rotating the screw rod, and can also acquire the soil at different depths according to the requirements.

The invention discloses a cam type can go-out method and device of an automatic vending machine, and belongs to the technical field of automatic vending machines. The device comprises a rack, a stepping motor, a storage can storehouse, a coupling, a sensor, a rotating shaft, a rotary wheel, an upper driven member, a lower driven member, a lower running pulley, an upper running pulley, a shaft sleeve, a lower guide sleeve, an upper guide sleeve, a lower baffle, an upper baffle and a positioning magnetic strip. The stepping motor controls the rotary wheel to rotate, the lower baffle and the upper baffle conduct synchronous movement along the contour line of a first guide groove and a second guide groove which are symmetrically formed in the rotary wheel, so that motions of can receiving and can falling are achieved, and single can discharging is achieved. The device is simple and clever in structural design, compact in connection, low in cost and long in service life; by means of the method, the process of multiple-can supplying can be achieved through repeating the mode of single-can supplying, the operation is simple and convenient, can go-out is accurate, and work efficiency is high.

The invention discloses a worn foot drop rehabilitation device which comprises a foot sole supporting plate, a supporting plate, an air bag, a pressure sensor, a massage device, bag straps, first malebuckles, first female buckles, bandages, second male buckles, second female buckles, a gas exchange device, a heating device, a control panel and a PLC. The supporting plate is arranged at one end ofthe foot sole supporting plate, the foot sole supporting plate and the supporting plate are of an integrated structure, and the air bag is embedded and fixed to the same side of the foot sole supporting plate and the supporting plate. The pressure sensor and the massage device are embedded and fixed to the surface of the air bag, the bag straps are arranged on the air bag and communicated with the air bag, the first male buckles are mounted at one ends of the bag straps, and the first female buckles used in cooperation with the first male buckles are mounted on the same side of the foot solesupporting plate and the supporting plate. When the foot drop rehabilitation device is used, the foot drop rehabilitation device is tightly connected with the human body, loosening can be avoided, blood circulation can be promoted, a patient suffering from foot drop can be recovered, a user can use the foot drop rehabilitation device comfortably in winter, and the heat preservation effect is good.

The invention provides an optical fiber coupling and welding device for a butterfly laser device. The optical fiber coupling and welding device comprises a supporting structure, an optical fiber fixture module, a laser welding module, a pipe shell fixture module and a monitoring module, wherein the optical fiber fixture module is arranged at a first position of the supporting structure and used for clamping and fixing an optical fiber so that the optical fiber can be fed into a pipe shell at a preset end corner angle for coupling; the laser welding module is arranged at a second position of the supporting structure and used for welding the coupled optical fiber in the pipe shell; the pipe shell fixture module is arranged at a third position of the supporting structure and used for clampingand positioning the pipe shell and electrifying the pipe shell completing optical fiber coupling and welding; and the monitoring module is used for monitoring the end face position and end face shapeof the optical fiber in the pipe shell. The modules are reasonable in structural design and compact in connection, and through orderly cooperation, multi-freedom-degree coupling, welding and electrifying integrated operation of the optical fiber can be realized simultaneously.

The invention discloses a TPU light conveyor belt and a preparation method thereof. The TPU light conveyor belt comprises conveying base cloth. A TPU hot melt adhesive film covers the conveying base cloth; a surface layer covers the TPU hot melt adhesive film, and the conveying base cloth, the TPU hot melt adhesive film and the surface layer are compounded together by way of high-temperature hot press. The TPU light conveyor belt disclosed by the invention has the beneficial effects that the TPU light conveyor belt uses a clean and pollution-free adhesive, so that purposes of simple process and pollution-free production process are achieved.

The invention relates to a short circuit overheating protection plug. The plug comprises a shell and a plurality of conducting plates, wherein the shell is in a hollow structure; the conducting platesare slidably connected to a side wall of the shell; a connecting plate is adhesively fixed on the plurality of conducting plates; an upper end of the shell is provided with a chute; a control rod isslidably connected in the chute; a first spring is adhesively fixed on the control rod; and one end, away from the control rod, of the first spring is adhesively fixed on an inner wall of the shell. The short circuit overheating protection plug has the advantages that when the conducting plates emit heat due to poor contact with a metal shrapnel in a socket, a steel ball strikes the connecting plate and drives the conducting plates to vibrate and moves at a distance toward the socket direction, at this time, the conducting plates and a thermoelectric power generation strip are out of contact so that an electromagnet is deenergized; the steel ball resets under the action of a second spring; the abovementioned operations are repeated so that the conducting plates and the socket are connectedmore tightly to prevent the dangerous condition that the short circuit is caused by overheating of the plug due to poor contact.

The invention discloses a technology based on the construction of rainwater pipelines, including the steps of measuring and setting out, trench excavation, foundation concrete pouring, pipeline laying, inspection well masonry, trench backfilling, rainwater outlets and connecting branch pipes. Clamp-type elastic connection, the slope of the stormwater connection pipe is not less than 1%, and the branch pipe connecting the stormwater outlet is buried in the road lime soil base after compaction, and a second excavation is adopted. The backfill material within the excavation range is medium-coarse sand. The above 0.5m shall be backfilled with C20 concrete, and a construction width of 30‑50cm should be reserved on each side of the excavated stormwater outlet groove and branch pipe groove, and the bottom of the groove shall be compacted. This process has simple construction steps and can greatly shorten the construction period. The connection is tight, and the sealing performance is maintained during the rainwater drainage process, which solves the problem that the existing rainwater pipelines have a cumbersome construction process, a long construction period, and cause rainwater leakage, which is not conducive to rainwater drainage.

The invention provides a precast concrete production line, and belongs to the field of precast concrete production. The precast concrete production line comprises a pouring vibration line, demolding lines, curing lines and a finger cart; the demolding lines release cured molds, and circularly convey the released molds into the pouring vibration line to be subjected to vibration distribution; the curing lines are arranged on the same side of the pouring vibration line and the demolding lines, and the arraying direction of the curing lines is perpendicular to the mold conveying direction of thedemolding lines; the finger cart operates along a conveying rail between curing kilns and the demolding lines, the poured molds are sent into the curing kilns, and the cured molds are transferred intothe demolding lines to be released; and the molds sequentially pass through the pouring vibration line, the curing lines, the demolding lines and the pouring vibration line to be poured, and thus thecirculating closed production line is constituted. According to the precast concrete production line, all working procedures are compactly connected, the transferring speed of the molds is high, theturnover period is short, the using frequency is high, the production efficiency can be improved, the production period is shortened, and using of labor force is reduced.

The invention discloses an apparatus and method for detecting the concentration of phenylthiocarbamide based on a biological tongue. The apparatus is electrically connected with a computer and comprises a bedstand, a detection box, a surface acoustic wave resonator arranged on the bedstand, an electronic counter, an oscillator and a cell electrode chip, wherein the surface acoustic wave resonator, the electronic counter, the oscillator and the cell electrode chip are arranged on the bedstand, the oscillator and the surface acoustic wave resonator compose an oscillation circuit, the electronic counter is electrically connected with the oscillation circuit, the surface acoustic wave resonator is electrically connected with the cell electrode chip, and the electronic counter is electrically connected with the computer. The method has the advantages of simple operation, good detection sensitivity, high detection precision and a fast detection speed; and the apparatus has the characteristics of good stability and repeatability.

A combined pot base comprises an aluminum pot base and a magnetic conductive heating plate, wherein a plurality of downward lug bosses are preformed on the bottom of the pot base; turning holes which are matched with the lug bosses are formed in the upper surface of the magnetic conductive heating plate in a punching mode; the magnetic conductive heating plate is attached to the bottom of the pot base so that the turning holes in the upper surface of the magnetic conductive heating plate sleeve the lug bosses of the pot base in a fastened mode; and through cold extrusion forming, the lug bosses deform and are riveted with the turning holes, so that the magnetic conductive heating plate is fixed onto the bottom of an aluminum pot in a combination mode. The combined pot base is characterized in that a groove is formed in the periphery of each lug boss, a turning edge of each turning hole can be inserted and positioned in the corresponding groove, an end surface of each lug boss is higher than the plane of the pot base, a bearing platform of which the shape and the thickness are matched with those of the magnetic conductive heating plate is preformed on the bottom of the pot base, and after combination, the lower surface of the magnetic conductive heating plate is basically parallel and level to the pot base. The invention also discloses a cold extrusion manufacturing method. Machining is facilitated, the manufacturing cost is low, and production efficiency is improved greatly.

The invention discloses a diagnosis method of mechanical composite faults. The diagnosis method includes the following steps that empirical mode decomposition is used for decomposing a composite fault signal into a plurality of IMF components; the characteristic quantity of each IMF component is extracted, and a fault sample data network model is established; each IMF component is regarded as a community in a network, and similar communities are merged according to the characteristics that internal connection of a community structure of a complicated network is tight and external connection of the community is loose; each community obtained through merging corresponds to one single fault; a merged signal is analyzed, composite fault characteristics are separated into single fault characteristics, and a fault diagnosis structure is obtained. According to the diagnosis method, the composite fault signal is decomposed into the IMF components at different frequencies, each IMF component is regarded as a community structure in the network, and a separated single fault signal is obtained according to merging of the complicated network communities, therefore, composite fault characteristic separation is achieved, and a diagnosis result is obtained.

The invention relates to an extravehicular spacesuit glove finger movement life span experiment device which comprises an air compressor, a vacuum generator, an air feeding hose, an extravehicular spacesuit glove, a finger suction disk, a driving cylinder component, a glove clamping mechanism, a three-finger suction disk clamping plate and a framework, wherein pressure air supplied by the air compressor is divided into two paths through the air feeding hose; one path is guided to the driving cylinder component to enable a driving cylinder to work, and the other path is guided to the vacuum generator, so that the vacuum generator generates vacuum degree, and generated negative pressure enables the finger suction disk to generate vacuum to firmly adsorb five fingers. According to the extravehicular spacesuit glove finger movement life span experiment device, finger movement of a person is simulated by a physical method, so that the extravehicular spacesuit glove finger movement life span experiment device replaces a hand to do life span test/experiment on extravehicular spacesuit glove fingers; therefore, the high-intensity life span test/experiment can be quickly implemented, and detection data can be acquired for technology research and application; finger tips of fingers of the extravehicular spacesuit glove are tightly connected with a test mechanism in a vacuum adsorption manner, so that the fingers cannot fall off, and no damage to the glove can be generated.

The invention discloses a safe stopping device of a building construction material elevator. The safe stopping device comprises a fixed seat. The bottom of the fixed seat is fixedly connected with supporting legs. The center of the lower surface of the fixed seat is fixedly connected with a fixed pile. Extending-retracting rods and fixed rods are movably installed on the top of the fixed seat. The top ends of the extending-retracting rods and the fixed rods are movably connected with the bottom of a clamping plate. In the safe stopping device, the ground is perforated and excavated through the fixed pile, and fixing is achieved through the supporting legs; the extending-retracting rods are matched with the fixed rods to extend and stretch, so that the inclining angle of the clamping plate is adjusted, the inclining angle of the clamping plate is matched with the angle of the elevator, and accordingly the clamping plate and the elevator are connected more closely; and the overall stability of the elevator is improved, the height and the angle are convenient to adjust, and the safe stopping device is applicable to the elevators of different sizes and applicable to the elevators in various states in use and is high in applicability.

The invention discloses a connection sealing ring which consists of the following raw materials in parts by mass: 25-30 parts of silicon rubber, 35-40 parts of chloroprene rubber, 20-30 parts of nitrile butadiene rubber, 40-50 parts of ethylene propylene rubber, 20-30 parts of fluororesin, 30-35 parts of butyl rubber, 36-38 parts of styrene butadiene rubber, 30-35 parts of butadiene rubber, 2-3 parts of active calcium, 3-5 parts of active zinc oxide, 4-6 parts of light magnesium oxide, 5-8 parts of dolomite powder, 6-8 parts of superfine powder of hydrated magnesium silicate, 5-6 parts of glyceryl tribenzoate, 4-5 parts of triglyceride fatty acid ester, 3-4 parts of hydroxyethyl methacrylate, 3-5 parts of polyether polyol and 10-15 parts of aluminum hydroxide. The connection sealing ring has the advantages of tight connection, strong resistance against external force pulling, convenience in mounting, high reliability, good resistance against strong oxidation, lasting good elasticity, applicability to long-term use, good ozone resistance, high tear strength and rare compressive deformation.

The invention provides a clamping device for a high-temperature tensile sample for a metal sheet. The clamping device comprises a clamp body and a clamping part connected to the clamp body, wherein agroove is formed in one end, far from a threaded hole, of the clamping part; and a wedge-shaped gasket I, an annular gasket I, a sample, an annular gasket II and a wedge-shaped gasket II are sequentially arranged in the groove, a guiding slot I which extends downwards and has a U-shaped longitudinal section is formed in the top end of the wedge-shaped gasket I, a fixed block I is arranged at the bottom end of the wedge-shaped gasket I, a guiding slot II which extends downwards and has a U-shaped longitudinal section is formed in the top end of the wedge-shaped gasket II, a fixed block II is arranged at the bottom end of the wedge-shaped gasket II, and a fixed pin sequentially penetrates through the through hole I, the annular gasket I, a sample, the annular gasket II and a through hole IIso as to fix the sample to the clamping part. The clamping device has the characteristics of small size, simplicity and convenience in operation and the like, and the centering and fixation of the sample can be easily finished, so that the purposes of shortening the test preparation period and improving the test efficiency are achieved.

The invention discloses a non-damage artery blocking clamp for organ transplantation. The non-damage artery blocking clamp comprises a base, a sliding groove, a fixed clamping plate, a sliding block,a mounting frame, a spring, a clamping plate, a button, a mounting sleeve, a connecting handle, a movable clamping plate, extrusion pads, a shell, a through groove, a grip handle, an extension grooveand a rotating wheel. The non-damage artery blocking clamp has the beneficial effects that the movable clamping plate can move in the front-rear direction under driving of the connecting handle, and thus arteries needing to the operated can be clamped and loosened through very easy operation; a tooth groove is formed in the upper end of the clamping plate, teeth are arranged in the shell, whereinthe tooth groove and the teeth can be mutually engaged, thus the clamping plate and the shell can be fixed together very firmly, the clamping effect is guaranteed, and loosening is effectively prevented; the soft extrusion pads are pasted to the faces, mutually attached, of the fixed clamping plate and the movable clamping plate correspondingly, thus stimulation to arterial vascular walls is lowered, and damage to blood vessels is prevented; and the connecting handle penetrates through the extension groove and is overlapped on the rotating wheel capable of freely rotating, thus the connectinghandle moves more smoothly, and borne resistance is small.

The invention relates to a pipeline lifting vehicle in a confined space. The pipeline lifting vehicle in the confined space comprises a jack, and is characterized by further comprising a bottom walking trolley and a pipeline supporting frame; the pipeline supporting frame is arranged in the bottom walking trolley; the bottom walking trolley comprises a framework used for containing the pipeline supporting frame; the two sides of the pipeline supporting frame are provided with limiting baffles; by means of the limiting baffles, the pipeline supporting frame is made to be placed in the framework; the jack is arranged at the bottom of the pipeline supporting frame, and the jack is also arranged in the framework of the bottom walking trolley; a to-be-lifted pipeline is placed on the pipeline supporting frame, the pipeline is conveyed to the assigned position through the bottom walking trolley; and the pipeline supporting frame is jacked through the jack, and therefore the pipeline can reach the assigned operation height. According to the pipeline lifting vehicle, pipeline transporting is performed through universal wheels, and the jack is used for lifting the pipeline; and compared with traditional pipe gallery large caliber pipeline construction, the work procedures of the whole process from that the pipeline enters the gallery to that welding is completed can be linked more compactly and orderly.

The invention discloses a centrifugal machine for a bolt galvanizing line. A driving motor and a centrifuging component are arranged in a frame side by side; a small motor pulley of the driving motoris connected with a large pulley on a driving shaft part; the upper surface of a power cone at the bottom center of a centrifuging barrel is provided with a plurality of rib plates from the center tothe periphery; the middle of a bottom plate of a bolt barrel is recessed into the bolt barrel; the lower surface of the bottom plate is provided with a plurality reinforcing bars from the center to the periphery; the bottom plate is seated on the power cone; each rib plate is arranged between the adjacent reinforcing bars. The bolt barrel and the centrifuging barrel are directly centered via a conical face; the bolt barrel and the centrifuging barrel are tightly connected with a very small gap left; the conical face can disperse and eliminate eccentric force; the power cone enables the whole bottom plate of the centrifuging barrel to be tightly connected with the driving shaft, thereby improving transmission connection strength and supporting force; the mutually matched ribs and rib platesarranged in radially surrounding form are used to transmit power, so that speed can be stably increased and high yield is guaranteed.

The invention relates to a brazing method and a solder preparation method for a high-volume-fraction SiCp/Al composite. A solder is an Al-Cu-Si-Mg quenched foil-like solder, the solder preparation method comprises the steps as follows: 1, material mixing; 2, preparation of a solder blank; 3, refinement of the solder into an alloy column; 4, quick melt-spinning of the alloy column for preparation of the quenched foil-like solder. The brazing method of the high-volume-fraction SiCp/Al composite comprises the steps as follows: 1, the surface of the SiCp/Al composite is pretreated; 2, a Ti active layer is formed on the pretreated surface of the SiCp/Al composite through magnetron sputtering; 3, a to-be-brazed surface is pretreated; 4, vacuum brazing is performed. The quenched foil-like solder and the Ti active layer can be subjected to a metallurgical reaction to form a compact reaction layer, brazing seams are well formed, joints are higher in shear strength and air tightness, and the brazing method can be widely applied to the welding field of the high-volume-fraction SiCp/Al composite.

A head-protecting airbag device includes: an airbag including: an airbag body; and a connecting tab connected with a mounting bracket, wherein the mounting bracket includes: a mounting piece mounted on the body with a fixing means; and a connecting piece formed to project to both sides from a lower end of the mounting piece, and connected with the airbag; in the connecting tab, an insertion hole, into which the mounting piece is inserted, is disposed in a folded portion; the connecting tab includes a front side portion and a back side portion which extend from the folded portion to the airbag body and cover a font side and a back side of the connecting piece; and a loop coupling portion is disposed in a position where the mounting piece having the connecting piece stored in the connecting tab is prevented from coming off the insertion hole.

The invention discloses a lifting type positioning pin device. The lifting type positioning pin device comprises a guiding main body, a positioning pin main body arranged in the guiding main body and a driving mechanism provided with an output rotating shaft. The driving mechanism is connected with the positioning pin main body through a swing rod. One end of the swing rod is relatively fixedly connected on the output rotating shaft of the driving mechanism in a sleeving mode in the circumferential direction. A long-strip-shaped sliding groove is formed in the other end of the swing rod. A connecting rod is inserted in the positioning pin main body. One end of the connecting rod is embedded in the sliding groove of the swing rod in a limited mode. A long-strip-shaped through groove allowing for penetrating of the connecting rod is formed in the guiding main body. The driving mechanism and the positioning pin main body are connected through the swing rod, and the guiding main body with a guiding function is arranged, so that the stability of the lifting movement of the positioning pin main body in the using process is guaranteed effectively; and using of easy-loss fine members such as a reset spring and a gear is avoided, so that the structure of the device is simplified greatly, the machining process requirements and mounting difficulty of parts are reduced, and accordingly the production cost is reduced.

The invention relates to an electric servo mechanism, in particular to a flat linear motor servo actuator suitable for flat installation spaces. Including the actuator base, the actuator housing covered on the actuator base, the front end cover and the rear end cover fixed on both ends of the actuator base and the actuator housing, and several stator irons fixed on the actuator base. Core, the coil winding wound on the stator core, also includes the guide rail assembly fixed on both sides of the actuator base, the mover body slidably connected to the guide rail assembly, and several magnetic steels fixed on the lower surface of the mover body; The steel is located directly above the stator core and coil windings; one end of the mover body is connected to a guide column, and the other end of the guide post passes through the front end cover and is connected to a bolt head assembly; the upper surface of the mover body and the inner wall of the actuator shell are provided with a Linear displacement sensor. The invention has high transmission efficiency, dynamic response, resolution and reliability, is suitable for flat installation space, and can drive seeker antennas or change warhead centroids and other small and medium power loads.

The invention discloses a laser welding shielding gas nozzle with a defocusing amount positioning function. The laser welding shielding gas nozzle with the defocusing amount positioning function is characterized in that a mounting base comprises a connecting plate for connecting with a welding head and a first cylinder connected with the connecting plate as a whole; the connecting plate is provided with a round hole for allowing laser too pass through; the round hole and the first cylinder are the same in inner diameter, and are coaxial; an air nozzle joint is formed in the side edge of the first cylinder; a main nozzle comprises a second cylinder connected with the first cylinder, and a third cylinder connected with a nozzle module; the inner diameter of the second cylinder is larger than the inner diameter of the third cylinder; the second cylinder is connected with the third cylinder through a conical cylinder; the second cylinder and the second cylinder are coaxial; and the nozzle module is one of a nozzle or a coaxial tip. The laser welding shielding gas nozzle can be replaced as a coaxial measurement tip for positioning a defocusing amount; and meanwhile, a measuring staff is on the side body of the nozzle for precisely measuring a distance value of the defocusing amount, so that the problem of weak measurement and positioning of the defocusing amount is solved, meanwhile, a TCP point is convenient to built, and the welding process is convenient to perform.

The invention discloses tilting prevention compact shelving. A first pulley is arranged at the bottom of a compact shelving body, a first sliding rail is arranged at the bottom of the first pulley, and sliding connection between the first pulley and the first sliding rail is formed; a second pulley is arranged at the upper end of the compact shelving, a second sliding rail is arranged at the upper end of the second pulley, and sliding connection between the second pulley and the second sliding rail is formed; a first groove and a second groove are formed in the lower portion and the upper portion of the front end of the compact shelving body respectively, a first cushion block and a second cushion block are connected to the first sliding rail and the second sliding rail in a sliding mode respectively, and a first protruding block and a second protruding block which can slide for a certain distance and be embedded into the first groove and the second groove respectively are arranged at the front end of the first cushion block and the front end of the second cushion block respectively. According to the tilting prevention compact shelving, a sliding connection device and sliding cushion blocks are arranged at the upper end of the compact shelving body, so connection between the compact shelving and the outside is tighter, and the tilting prevention compact shelving will not fall down even if a lot of articles are placed at the upper end and the articles are quite heavy.

The invention discloses a sieve-pore-size-adjustable vibration sieve. The sieve-pore-size-adjustable vibration sieve comprises a vibration sieve shell and is characterized in that a frame is arrangedinside the vibration sieve shell, an upper screen is fixedly arranged in the frame, the bottom of the frame is fixedly connected with one end of an electric telescopic rod, the other end of the electric telescopic rod is fixedly connected with a fixing plate, a lower screen is arranged on the fixing plate in a lap joint manner and arranged right below the upper screen, a second magnet is fixedly arranged at the center of the bottom of the lower screen, a gear motor is fixedly arranged at the bottom of the vibration sieve shell, the output shaft of the gear motor is fixedly connected with the spindle of a second gear through a coupler, and the second gear meshes with a first gear. The sieve-pore-size-adjustable vibration sieve has the advantages that by the electric telescopic rod, the fixing plate, the gear motor, an air cylinder and support rods, the problems that friction between screens easily occur during the sieve pore size adjustment of a traditional vibration sieve, and a gap exists between the screens after the adjustment are solved.

The invention discloses an improved key ring. The improved key ring comprises a C-shaped main part, wherein an anti-disengaging pin penetrates through one side of the C-shaped main part, a hanging part rod is arranged below the C-shaped main part, a nut pit and a shoulder are arranged on the two ends of the C-shaped main part respectively, the shoulder is provided with a spring fixing groove, a polygonal penetration hole and an L-shaped integrated movable part rotary motion grooved rail, an L-shaped integrated movable part is provided with an anti-slipping hole position and a rotary shaft, a spring clamping groove is formed in the rotary shaft which stretches into the C-shaped main part through the polygonal penetration hole, the rotary shaft is sleeved with a rotating contracting spring and a hollow sleeve, the two ends of the rotating contracting spring are fixed in the spring clamping groove and the spring fixing groove respectively, the hollow sleeve makes contact with and is connected with a cross-shaped double-threaded screw, the two ends of the cross-shaped double-threaded screw are connected with the rotary shaft and the anti-disengaging nut respectively, and the anti-disengaging nut is matched with the nut pit. By the adoption of the improved key ring, a key can be mounted and dismounted conveniently, all the parts are connected tightly and not prone to disengagement, a finished product is closed after installation, the parts can not be detached easily manually, and the L-shaped integrated movable part can restore automatically to be closed.

The invention discloses a pneumatic multifunctional massage instrument, and belongs to the technical field of medical and healthcare apparatus and instruments. The pneumatic multifunctional massage instrument mainly comprises ear massage fingers, a neck surrounding strap and shoulder massage heads. The ear massage fingers are connected with the upper end of the neck surrounding strap, and the shoulder massage heads are connected with the lower end of the neck surrounding strap. The pneumatic multifunctional massage instrument has the advantages that the pneumatic multifunctional massage instrument can be completely driven by air pressures, and ear, neck and shoulder massage healthcare effects can be simultaneously realized by the pneumatic multifunctional massage instrument; the pneumaticmultifunctional massage instrument is simple in structure and safe in use, massage force and rhythms can be adjusted in a stepless manner, comfortable massage effects can be realized by the pneumaticmultifunctional massage instrument, and large quantities of sites can be massaged by the pneumatic multifunctional massage instrument.