58results about How to "Good locking effect" patented technology

The invention discloses an anti-loose locking method and a never-loose bolt. The never-loose bolt includes a bolt head and a screw which is connected with the bolt head as a whole. The screw consistsof a right-hand thread section and a left-hand thread section which is connected with the right-hand thread section, and the diameter of the right-hand thread section is greater than the diameter of the left-hand thread section; and the right-hand thread section is connected with a right-hand thread nut in a threaded mode, the left-hand thread section is connected with a left-hand thread nut in athreaded mode, and the right-hand thread nut and the left-hand thread nut are movably connected together to form a conjoined nut which can rotate relatively but cannot be separated. According to the anti-loose locking method and the never-loose bolt, the mutual containment and mutual blocking actions of the conjoined nut are adopted to achieve the purpose of looseness prevention and locking. Not only is the assembly convenient, but also the used screws and nuts are not damaged, the screws and the nuts can still be used continuously, and the cost is saved.

The invention discloses a device suitable for testing shock absorbers of motorcycles of different sizes and models, relates to the technical field of auto parts, and solves the problem of testing shock absorbers of different sizes and models by replacing pressure sleeves and protective pads with different inner diameters in the prior art. The problem of the test; it includes a base, a support frame installed on the base, and a compression mechanism installed on the support frame, an installation cavity is opened in the base, and a support mechanism corresponding to the compression mechanism is provided on the base , the pressing mechanism is provided with a clamping assembly for clamping the ends of shock absorbers of different sizes and models, and also includes a moving assembly that drives the pressing mechanism to move along the horizontal direction of the support frame, and the moving assembly also includes Equipped with positioning locking components. Through the implementation of this technical solution, it can be applied to the test of motorcycle shock absorbers of different sizes, and after clamping and fixing the shock absorber, it can be locked in the horizontal direction, so as to avoid the vibration of the simulated shock absorber in the horizontal direction. move.

The invention provides an automatic centering and clamping device for the inner cylindrical surface of a workpiece, belonging to the technical field of machining. It includes a left connecting rod, a right connecting rod and a sleeve. The lower end of the left swing seat of the left centering and clamping assembly is hinged on the left bracket, and the left pressure block is installed in the left support groove of the left swing seat through the left positioning pin. The right pressure block of the centering clamping assembly is installed in the right support groove of the right swing seat through the right positioning pin, the sleeve can be slid up and down on the support section of the driving rod, and the spring support ring is installed on the connecting section of the driving rod. The upper end of the compression spring is fitted with the lower end face of the sleeve, the lower end is fitted with the spring support ring, one end of the left link is hinged with the left support lug, the other end of the left link is hinged with the right middle section of the left swing seat, and the right link is hinged. One end of the rod is hinged with the right lug, and the other end of the right link is hinged with the middle section of the left end of the right swing seat. The invention realizes the automatic centering and clamping of the inner cylindrical surface of the workpiece, and has not only reasonable structure, low cost, but also convenient disassembly.

The invention discloses an automatic control hydrogen absorption and desorption system for a solid hydrogen storage material. The automatic control hydrogen absorption and desorption system comprisesa hydrogen filling pipe section, a hydrogen desorption pipe section and a stainless steel hydrogen storage tank. The stainless steel hydrogen storage tank comprises a stainless steel tank body and a tank body cover, and a plurality of metal baskets are arranged in the stainless steel tank body. A hydrogen filling hole and a hydrogen desorption hole are formed in the left end and the right end of the tank body cover respectively, and a temperature measuring hole is formed in the middle of the tank body cover. The hydrogen filling hole is connected with a hydrogen compressor through a hydrogen filling pipeline. The hydrogen desorption hole is connected with a hydrogen desorption pipeline. A thermocouple is inserted in the temperature measuring hole, and the lower part of the thermocouple extends into a central pipe. A heat preservation layer is arranged on the outer side of the stainless steel tank body, an electromagnetic heating coil is arranged in the heat preservation layer, and theheat preservation layer and the electromagnetic heating coil form an electromagnetic heating sleeve with a heat preservation function. The hydrogen compressor and the thermocouple are respectively connected with a computer control device. The automatic control hydrogen absorption and desorption system can achieve automatic control of temperature and hydrogen pressure, can be suitable for most solid hydrogen storage materials and has a wide application range.

The invention relates to a motor rotor iron core potting lamination device and a potting method, and belongs to the technical field of a motor rotor. The lamination device is placed on an operation platform and comprises a cover board and a base which are respectively arranged on the upper and lower end faces of a rotor iron core, and a connection shaft which is positioned in the rotor iron core and locks and connects the cover board and the base; and an adhesive injection groove communicated with a magnetic steel groove of the rotor iron core is formed on the cover board. The potting method applying the lamination device comprises: installation of the potting lamination device, injection of a potting adhesive, curing of the potting adhesive and disassembling of a locking structure. The motor rotor iron core potting lamination device and the potting method have the beneficial effects that the potting lamination device is simple in structure, convenient and rapid to operate and convenient for integral assembling, locking and disassembling, and can effectively solve a problem that after the rotor iron core is injected with the adhesive, the adhesive permeates into a gap between punching sheets; use performance of the rotor iron core is improved; and working efficiency is improved.

The invention discloses a movable support for wrist joints. The movable support for wrist joints is used for fixing fractured bones of the wrist and comprises a first adjuster and a second adjuster. A first slide groove for mounting two single-needle clamps is formed in the first adjuster axially, and the two single-needle clamps are respectively provided with a needle clamp hole and can be moved or fixed along the first slide groove. A second slide groove for mounting a double-needle clamp is formed in the second adjuster axially, and the double-needle clamp is provided with two needle clamp holes and can be moved or fixed along the second slide groove. Opposite ends of the first adjuster and the second adjuster are connected integrally by a locking unit; an adjusting mechanism used for adjusting the double-needle clamp in the second slide groove is arranged in an inner cavity of the second adjuster. The movable support for the wrist joints has the advantages of good fixing and locking effect and high safety coefficient, and can be used for fixing and locking for fractured bones of two portions.

The invention discloses an electric connector with a self-locking structure. The connector comprises a plug main body and a socket main body, wherein an alloy outer ring, a nut and a torsional spring for resetting the alloy outer ring rotating are arranged on the plug main body, one end of the nut is arranged in the alloy outer ring in a sleeving manner, the bent part of the torsional spring is fixedly arranged on the outer periphery of the nut in a sleeving manner, and the two bottom ends of the torsional spring are fixed on the inner side of the alloy outer ring; a seat and a jump spring arranged on the inner side of the seat are arranged on the socket main body, a buckle is externally bent at one end of the jump spring in the radial direction facing the alloy outer ring, and a clamping groove matched with the buckle is formed in the radial direction of the inner side of the alloy outer ring; after the buckle for connecting the plug main body and the socket main body is clamped in the clamping groove, the plug main body is locked with the socket main body; after the buckle is separated from the clamping groove through rotating the alloy outer ring, the plug main body is separated from the socket main body. The connector is more convenient to use through adoption of the design modes of automatic locking after the plug main body is inserted into the socket main body and automatic unlocking after the outer ring rotates.

The invention provides a bolt dismounting and mounting blocking device. Locking blocks and supporting tightened screws are correspondingly installed on the two sides of a supporting body, each supporting tightened screw abuts against one end of the corresponding locking block, the two sides of a clamping block are provided with wedge-shaped grooves, the middle of the clamping block is provided with an opening, and the two sides of the clamping block are in wedged connection with the locking blocks. The middle of the supporting body is provided with a locking screw rod which is in threaded connection with the clamping block. The clamping block and the locking blocks are self-locked in a wedged mode, the locking effect is good, the purposes of fast locking, dismounting and mounting bolts can be achieved, the operation is convenient, the structure is compact, the dismounting and mounting period of a main bearing bolt can be effectively shortened, dismounting and mounting efficiency is improved, the scrap and losses of the main bearing bolt are reduced, and cost is reduced.

The invention relates to hoisting machinery, in particular to a protective door electromechanical interlocking device. A protective door electromechanical interlocking device in the prior art is complex in structure and single in door opening mode of protective doors, cannot meet the requirement for double purposes for carrying both people and goods in GB26557-2011 'cage with vertically-guiding construction lift with double purposes of carrying people and goods'. The protective door electromechanical interlocking device meets the requirement in the standard of the GB26557-2011 'cage with vertically-guiding construction lift for carrying people and goods'; the flat layer of the cage is high in precision; the door opening mode of the protective doors is flexible; the protective door electromechanical interlocking device is simple in structure and low in manufacturing cost; safety performance of a lift is improved; the independent mechanical lock is arranged on each protective door, the mechanical locks are simple in structure and low in manufacturing cost, after the protective doors are closed, each protective door is locked through each mechanical lock, therefore, the protective doors are prevented from being opened accidentally, the locking effect of the protective doors is good, and safety performance of the lift is improved.

The invention discloses an automotive trim door plate multifunctional composite testing fixture and a using method thereof. The invention belongs to the technical field of detection, the problem thatin the prior art, the three-dimensional full-size front and back face detection function of an automotive trim injection molding door plate body and a door plate assembly cannot be achieved is solved.The automotive trim door plate multifunctional composite testing fixture is characterized in that a door plate iron door sheet metal profiling block, a positioning locking mechanism, a door plate substrate main positioning block, a Y-direction limiting mechanism and a Z-direction limiting mechanism are arranged in front of the detection tool bottom plate; a door plate assembly back profiling block, a back positioning and pressing elastic sheet, a door plate assembly back handle profiling block and a door plate base plate back positioning block are arranged behind the checking fixture bottom plate; beneficial effects are as follows, only one set of detection tool needs to be developed; through disassembly, assembly and switching of different mechanisms, a three-coordinate full-size front and back full-size detection function of the injection molding door plate body and the door plate assembly and an imitation vehicle door metal plate matching gap measurement function are realized, thedevelopment cost of the detection tool is reduced, rapid installation and rapid disassembly are realized, and the detection accuracy and the high efficiency of the detection process are improved.

The invention discloses an electrical cable connector of mechanical automation equipment, and the connector can achieve a good locking and fixing effect on a cable through a locking and fixing mechanism, thereby guaranteeing the connection stability of the cable and the connector, and guaranteeing that the cable is not loosened in a working process. The problem of poor contact between the cable and the connecting line is avoided, and the locking insertion rod and the locking insertion slot are inserted and locked, so that the locking work of the locking and fixing mechanism has a very good reinforcing and assisting function, and the connection strength between the cable and the connector can be further improved; and, through cooperative use of the arranged movable frame and the locking and fixing mechanism, the cable cannot be scratched and damaged when the cable is plugged or pulled out, so that the quality of the cable is ensured, the service life of the cable is prolonged, and the use economic benefit of the cable is improved.

The invention discloses a powerful locking vault door. The powerful locking vault door comprises a door frame and a door leaf. One side of the door leaf and the door frame are connected in a hinged manner, and horizontal locks are arranged between the other side of the door leaf and the door frame in a spaced manner. A locking mechanism is arranged between the door frame and the door leaf and comprises a transmission gear installed in the door leaf in a rotation fit manner, two vertical racks and one horizontal rack, wherein the vertical racks and the horizontal rack are engaged with the transmission gear. The two vertical racks are fixedly connected with a top lock rod and a ground lock rod correspondingly. A top lock is arranged at the upper end of the top lock rod, and a ground lock is arranged at the lower end of the ground lock rod. The door frame and the door leaf are provided with lock holes matched with the top lock and the ground lock correspondingly. The horizontal rack is provided with a connecting rod mechanism connected with all the horizontal locks. The horizontal rack is provided with a limiting protrusion, and the door leaf is provided with a lock I with a spring bolt matched with the limiting protrusion. The top lock rod is provided with a horizontal limiting rod, and locks II with spring bolts in limiting fit with the horizontal limiting rod are arranged in the door leaf at intervals. The door leaf is further provided with a hand wheel used for driving the transmission gear to rotate.

The invention discloses an optical cable lockset and a mounting method of the optical cable lockset. The optical cable lockset is characterized by comprising a U-shaped lower holding clamp, an upper holding clamp, a locking plate, a fixing screw, a locking screw and a fastening screw; a semicircular groove is formed in the bottom of the inner side of the U-shaped lower holding clamp, and a semicircular arch groove matched with the semicircular groove of the U-shaped lower holding clamp is formed in the bottom of the upper holding clamp; a fixing cavity for an optical cable is formed by the semicircular groove and the semicircular arch groove; the fixing screw penetrates through a through hole of the locking plate to be fixed in the fixing screw hole on the end surface of the top of the U-shaped lower holding clamp; the locking screw penetrates through the locking screw hole in the locking plate to be fixed at the top of the upper holding clamp so as to form a locking structure for the optical cable; the fastening screw penetrates through a steel wire hole of the U-shaped lower holding clamp so as to form a fastening structure for a steel wire. According to the invention, not only can the optical cable be locked and fixed, but also most of tensile force born by a cable connector box is even decomposed when the tensile force of the optical force is enhanced, and a core of the optical cable is protected from damage.

The invention discloses an ambulance stretcher. The ambulance stretcher comprises a bedstead, a folding mechanism, a locking mechanism and a driving mechanism, wherein the folding mechanism comprises a first supporting rod which can rotate around a first axis line through the upper end of the first supporting rod, a second supporting rod of which the lower end is hinged to the lower end of the first supporting rod, a first rotating shaft which can rotate around a second axis line and to which a first connecting plate is connected, and a third supporting rod of which the upper end is fixedly connected to the first rotating shaft and the lower end is hinged to the upper end of the second supporting rod; the locking mechanism comprises a locking plate which can rotate around a third axis line and is used for being propped against or away from the first connecting plate; the driving mechanism comprises a second rotating shaft which can rotate around a fourth axis line and to which a second connecting plate for being propped against the first connecting plate to drive the third connecting rod to rotate upwards is connected; the first axis line, the second axis line, the fourth axis line and the third axis line separately extend in the horizontal direction, and the first axis line, the second axis line and the fourth axis line separately extend in the left and right direction of the bedstead and are perpendicular to the third axis line. The ambulance stretcher disclosed by the invention is simple in structure and good in locking effect; and during impact, folding is easier.

The invention discloses an optical cable lockset and a mounting method of the optical cable lockset. The optical cable lockset is characterized by comprising a U-shaped lower holding clamp, an upper holding clamp, a locking plate, a fixing screw, a locking screw and a fastening screw; a semicircular groove is formed in the bottom of the inner side of the U-shaped lower holding clamp, and a semicircular arch groove matched with the semicircular groove of the U-shaped lower holding clamp is formed in the bottom of the upper holding clamp; a fixing cavity for an optical cable is formed by the semicircular groove and the semicircular arch groove; the fixing screw penetrates through a through hole of the locking plate to be fixed in the fixing screw hole on the end surface of the top of the U-shaped lower holding clamp; the locking screw penetrates through the locking screw hole in the locking plate to be fixed at the top of the upper holding clamp so as to form a locking structure for the optical cable; the fastening screw penetrates through a steel wire hole of the U-shaped lower holding clamp so as to form a fastening structure for a steel wire. According to the invention, not only can the optical cable be locked and fixed, but also most of tensile force born by a cable connector box is even decomposed when the tensile force of the optical force is enhanced, and a core of the optical cable is protected from damage.

The invention relates to the technical field of electric vehicle antitheft devices, in particular to an intelligent seat cushion lock. The intelligent seat cushion lock comprises a self-locking module and a motor module; the self-locking module is composed of a metal mounting fixed bottom plate, a metal fixing plate, a connecting spring, a self-locking baffle and a locking plate; the metal mounting fixed bottom plate and the metal fixing plate enable the locking plate and the self-locking baffle to be fixedly connected; the locking plate and the self-locking baffle are internally provided with the connecting spring; the motor module is composed of a motor mounting base, a limiting switch, a motor and a control board; the limiting switch, the motor and the control board are all arranged on one side of the motor mounting base; the self-locking module is arranged on the other side of the motor mounting base, and a transmission wheel on the motor is connected with the self-locking baffle; the intelligent seat cushion lock is simple in structure, convenient to operate, stable and reliable in work, high in sensitivity and good in locking effect, and intelligent opening and closing of the lock can be achieved through the motor and the control board.

The invention belongs to the technical field of medical appliances, in particular to a body position fixator for pediatric surgical operation. The body position fixator comprises a supporting platformand a supporting frame. A bandage fixation mode of traditional operation is changed into a locking air bag fixation mode, on one hand, the problem that the position adjustment is inconvenient duringtraditional body position fixing is solved, on the other hand, a locking air bag has higher elasticity and flexibility, secondary injury to a patient due to too tight fixation by a high-hardness bandage is reduced, and therefore, the child patient is effectively protected; besides, fixed boxes are arranged on the supporting platform, and by cooperation of extrusion air bags, No.1 pistons and No.2pistons in the fixed boxes, the locking fixation effect of the locking air bag on the patient is enhanced and unsmooth operation caused by body movement when the patient is nervous or painful is reduced.

The invention relates to the technical field of traditional Chinese medicine decocting and mixing processing, in particular to a traditional Chinese medicine decocting machine and a traditional Chinese medicine decocting and mixing system and module.The traditional Chinese medicine decocting machine comprises a medicine decocting machine, a medicine decocting container and a liquid storage container, wherein the medicine decocting machine comprises a medicine decocting platform and a heat preservation platform, which are arranged in a stepped mode; the medicine decocting platform is used for heating the medicine decocting container arranged on the medicine decocting platform; the heat preservation platform is used for heating and preserving the heat of the liquid storage container arranged on the heat preservation platform; the medicine decocting container is used for decocting traditional Chinese medicine liquid; and the liquid storage container is used for preserving the heat of the medicine liquid decocted by the medicine decocting container. Since the medicine decocting machine is arranged in the stepped mode and is cooperated with the medicine decocting container and the liquid storage container, which can be stacked to carry out medicine liquid output, the medicine decocting container after medicine liquid decoction can be directly translated to the position above the liquid storage container and then can directly carry out output through a one-way device at the bottom of the medicine decocting container, grabbing and dumping are not needed, the working process of filtering, outputting and mixing of primary decoction and secondary decoction is greatly simplified, and rapidness and convenience are achieved.

The invention discloses a portable locking device. The portable locking device is composed of a locking ring, springs, a locking bolt and anti-skid pads. A locking buckle is arranged on the upper portion of the locking ring and provided with a pin. A pin hole is formed in the joint of the locking ring and the locking buckle. The inner side of the locking ring is provided with the anti-skid pads. The anti-skid pads are arranged along the inner side circumference of the locking ring. One end of each spring is fixedly connected to the outer circle of the locking ring, and the other end of each spring is provided with a ring buckle. The ring buckles are connected through the locking bolt. The portable locking device is simple in structure, easy to achieve, capable of being carried with people, very convenient and good in locking and connecting effect, pipe fittings cannot be damaged, and the requirement for locking and connecting different sizes of pipe fittings can further be met.

The invention discloses a radial drilling machine. According to the radial drilling machine, a base is connected with a cross rod through an adjustment rod; a fixing device is arranged below a drill bit; a first slide groove and a second slide groove are formed in the left side and the right side of the fixing device respectively; the two sides of the first slide groove are movably connected with a first moving block and a second moving block through slide wheels respectively; a third moving block and a fourth moving block are movably connected to the two sides of the second slide groove through slide wheels respectively; first cross beams are fixed at the top ends of the second moving block and the fourth moving block; second cross beams are fixed at the top ends of the first moving block and the third moving block; the left sides of the first cross beam and the second cross beam are movably connected through a first screw rod, and the right sides of the first cross beam and the second cross beam are movably connected through a second screw rod; and a first locking nut and a second locking nut are fixed at the front ends of the first screw rod and the second screw rod respectively. The drilling machine disclosed by the invention is simple in structure and better in fixing effect.

The invention discloses a five-machine-head pure hydraulic hoop bending machine. The five-machine-head pure hydraulic hoop bending machine comprises a machine base, five machine heads, a first oil supply mechanism and a second oil supply mechanism; the five machine heads are sequentially arranged side by side and movably connected to the machine base; a pressing mechanism is arranged below each machine head, each pressing mechanism comprises a pressing oil cylinder, and when the output end of each pressing oil cylinder extends to abut against the machine base, movement of the machine heads islimited; each machine head comprises a hoop bending mechanism; each hoop bending mechanism comprises a bend disc, a bend shaft, a mandrel, a telescopic oil cylinder, a gear shaft and a bending oil cylinder; the bend shafts are eccentrically arranged at the bend discs correspondingly; the mandrels penetrate through the circle centers of the bend discs until the head ends of the mandrels are opposite to the bend shafts correspondingly; the telescopic oil cylinders drive the mandrels to stretch relative to the bend discs correspondingly; the gear shafts are sleeved at the tail ends of the mandrels correspondingly, and the end parts of the gear shafts are connected with the bend discs correspondingly; first racks are arranged at the output ends of the bending oil cylinders correspondingly andare engaged with teeth of the gear shafts correspondingly. The whole machine is hydraulically driven, so that the five-machine-head pure hydraulic hoop bending machine has the advantages of simple structure, low failure rate and good locking convenience effect.

The invention relates to an underground fracturing sliding sleeve tool switch which comprises an identification mechanism, a transmission mechanism, a clamping and locking mechanism and a sealing mechanism, the transmission mechanism comprises a shell, a transmission shaft and a transmission spring, the shell is a cylinder, and a stepped hole is formed in the shell along a central shaft; the recognition mechanism comprises an axial recognition sliding block, a gear recognition sliding block and a first balance sliding block, and the first balance sliding block and the sliding blocks are installed in corresponding installation holes of the shell in a telescopic mode respectively. The axial recognition sliding block is provided with a sliding ruler, the lower bottom face of the sliding ruler is an inclined face, the sliding ruler extends into the sliding ruler sliding way, and the gear recognition sliding block is provided with a transmission rack. The transmission shaft is integrally formed by a circular shaft, a transmission gear shaft and a regular hexagonal shaft from top to bottom; the clamping and locking mechanism comprises a dog tooth, a dog tooth cam and a dog tooth base; the sealing mechanism comprises sealing rubber, a sealing sliding block and a front cap. The safety and stability of the mechanism can be integrally improved, accurate recognition is truly achieved, and the sealing effect is good.

The invention discloses outdoor carrying equipment. The equipment structurally comprises a top storage device for loading articles or personnel, the lower side of the top storage device is provided with a distance size adjusting device which is used for driving the equipment to move, can adjust the working height of the equipment and assists in driving the equipment; a middle connecting device used for connecting the top storage device and the distance size adjusting device in a matched mode is arranged between the top storage device and the distance size adjusting device. The design of the top storage device, the distance size adjusting device and the middle connecting device is adopted for the equipment, so that personnel can conveniently pull the equipment, and the related structural distance of the equipment can be changed according to the width of the equipment moving road surface; the equipment can move efficiently, the height of related structures in the equipment can be adjusted, and the equipment can move efficiently according to different road surface heights.

The invention relates to a pressure assisting device of an inner hole positioning fixture. The pressure assisting device comprises a pressure column, two handles, a pressure block, an extrusion bar and a positioning block, wherein the two handles are symmetrically welded at the two ends of the pressure column; an operator operates the pressure assisting device through the handles before and after work; the pressure block is square, and is welded at the upper end of the pressure column; the operator uses a hammer for powerfully beating the upper end surface of the pressure block, so that the extrusion bar linearly moves on a pump body inner hole fixture; the left end of the extrusion bar is welded on the pressure column, and the right end is provided with an external thread; an internal thread hole is formed in the positioning block; V-shaped slide blocks are evenly distributed on the outer wall of the positioning block; the positioning block and the extrusion bar are in threaded connection; and the mounting, the disassembly and the maintenance of the positioning block are convenient through the threaded connection mode. The pressure assisting device can assist the pump body inner hole fixture to realize the positioning locking function of a pump body inner hole, and has such advantages as simple operation, simple structure and good positioning locking effect.

The invention discloses a core rod structure for a pullback-type safe self-destructive syringe. An asymmetrical elastic locking and pullback component is arranged on the end part of a rod body, wherein the pullback component takes a symmetrical central line of a core rod as a central axis; a clamping and locking part is arranged on each of the two sides of the central axis; and the clamping and locking parts on the two sides are asymmetrical. One or both of the clamping and locking parts are elastic, an elastic function ensures that the clamping and locking parts can be smoothly inserted into the inner cavity of a needle seat, and through elastic expansion force, asymmetrical clamping parts on the two sides can be clamped and locked with the clamping and locking parts in the inner cavity of the needle seat; and after the needle seat is pulled back into a syringe cylinder, in a stressing environment of an asymmetric force, the needle seat can automatically deflect towards one side, and an injection needle falls towards one side of the inner wall of the cylinder in the nearly 45-degree angle direction and is locked by the neck part of the cylinder, so that the injection needle and the needle seat cannot be pushed out of the neck part of the cylinder again, secondary damage or cross infection caused by pushing a needle head out of the cylinder again after use is effectively prevented.

The invention discloses an automatic control hydrogen absorption and discharge system for solid hydrogen storage materials, which includes a hydrogen charging pipe section, a hydrogen discharging pipe section and a stainless steel hydrogen storage tank; the stainless steel hydrogen storage tank includes a stainless steel tank body and a tank body cover, and the stainless steel tank body There are multiple metal baskets inside; there are hydrogen charging holes and hydrogen discharging holes at the left and right ends of the tank cover, and a temperature measuring hole is set in the middle of the tank cover; The hydrogen compressor is connected to each other; the hydrogen discharge hole is connected to the hydrogen discharge pipeline; a thermocouple is inserted in the temperature measurement hole, and the lower part of the thermocouple extends into the central tube; An electromagnetic heating coil is provided, and the insulation layer and the electromagnetic heating coil form an electromagnetic heating jacket with insulation function; the hydrogen compressor and the thermocouple are respectively connected with a computer control device. The invention can realize the automatic control of temperature and hydrogen pressure, and is applicable to most solid hydrogen storage materials with a wide application range.

The invention discloses an antitheft access control method based on radio frequency identification technology. The method comprises the following steps: installing an end plate on a door and allowing the position of an electronic lock to correspond to the position of a lock catch on the door; and controlling prestored radio-frequency card information and an unlocking mode cipher, placing a radio-frequency card at a card reader position, allowing a card reader to read the card, receiving a card reader signal via a controller, allowing the controller to compare the signal with stored information, and when the signal matches with the information, allowing the controller to send the information of the card reader to a display for displaying. According to the invention, through arrangement of the electronic lock and a back locking rod controlled by an electromagnet, locking can be realized, and back locking can be realized through one operation; and structure is simple and operation is convenient.