41results about How to "Play the role of sealing protection" patented technology

The invention discloses a machining method of a worm gear type pivoting support and belongs to the technical field of pivoting support machining. The machining method of an outer ring of the worm gear type pivoting support comprises the steps of rough turning, half finish turning, heat treatment, finish turning, hobbing, scribing, drilling and lathe grinding. The machining method of a middle ring of the worm gear type pivoting support comprises the steps of rough turning, boring and drilling, half finish turning, heat treatment, finish turning, scribing, drilling and lathe grinding. The machining method of an inner ring of the worm gear type pivoting support comprises the steps of rough turning, half finish turning, finish turning I, gear shaping, heat treatment, finish turning II, scribing, drilling and lathe grinding. The pivoting support machined through the machining method can meet the requirements of entertainment machinery, light industry machinery, filling machinery and the like for bidirectional rotational motion and bear large turning torque, the abrasion resistance of gear teeth is remarkably improved, installation between a sealing ring and the pivoting support is firmer, the sealing ring and the pivoting support are not prone to falling off, and the service life of the worm gear type pivoting support is greatly prolonged.

The invention discloses a wheel permanent-magnet generator which comprises a wheel and a permanent-magnet generator, wherein the wheel is a driven wheel and comprises an axle, a wheel shell and a wheel shell cover plate; the permanent-magnet generator mainly comprises an outer rotor and an inner stator, wherein the inner stator is fixed on the axle between the wheel shell and the wheel shell cover plate; the outer rotor corresponds to the inner stator and is placed on the inner wall of the wheel shell; and a power supply output wire of a winding coil on the inner stator is connected with external electricity-storage equipment after penetrating through the axle. The stator is connected with the axle through a stator bracket; a bearing is arranged among the wheel shell, a wheel cover and a shaft, and an oil seal is arranged at the outer side; and rare-earth permanent-magnet steel is arranged on the inner wall of the outer rotor. The wheel permanent-magnet generator adopting the structure not only has the advantages of simple and compact structure, less loss, environmental protection, scientificity and quite reliable operation and is used on the driven wheels of various vehicles, such as automobiles, electric vehicles or hybrid vehicles, and the like, and the outer rotor on the wheel permanent-magnet generator is driven to rotate by the wheel to generate electrical energy. The wheel permanent-magnet generator is an ideal vehicle-mounted electricity generating device.

The present invention relates to a non vacuum high temperature solar selective absorbing coating composite anti-reflection coating and a preparation method thereof, wherein the method comprises the following steps: (1) preparing A1203 colloidal sol and Sn02 colloidal sol; (2) putting the sample into A1203 colloidal sol to form A1203 film via sol-gel dip-coating and heat treatment; after curing and polishing of the A1203 colloidal sol, doing sol-gel dip-coating for anther time, and keeping the A1203 colloidal sol unthickened and completely sealed; putting the sample plated with A1203 film into Sn02 colloidal sol to form Sn02 film via sol-gel dip-coating and heat treatment, and keeping the thickness of the Sn02 colloidal sol when doing sol-gel dip-coating for another time after polishing the surface with flannelette, whereby the composite anti-reflection coating is obtained. The present method has high infrared reflectivity, prolonged service life of the coating, and is suitable for medium-high temperature working environment. Additionally, the bi-layer thin film has simple preparation technology, easy controlling, short production cycle and convenient operation.

The invention provides an internet-of-things type aquaculture fully-automatic feed-releasing device. The internet-of-things type aquaculture fully-automatic feed-releasing device comprises an aquaculture pool bottom, a supporting stand column, an L-shaped supporting rod, an infrared sensor, a feed-releasing workbench, a multi-angle feed-releasing drum structure, a feed-filterable feeding hopper structure, an insulating protective control box structure, a feed-distribution stirring blade structure, an anti-mosquito illuminating lamp structure, an embankment, a rotating auger blade, a feed-conveying supporting rod, a feed-conveying motor, a feed-guiding cylinder and a stirring feed-conveying shaft. The aquaculture fully-automatic feed-releasing device provided by the invention has the following advantages: through additional arrangement of more outlets for feeding of a feed, multi-angle feeding of the feed can be realized; the needs of aquaculture of multiple water areas are met; meanwhile, through the rotating auger blade for secondary stirring of the feed and filtering of the feed in the feed feeding process, odor is prevented from entering the automatic feed-releasing device to affect performing of feed releasing; and during operation at night, a matched illuminating mosquito-repellent unit is supplied to facilitate feed feeding.

The invention relates to the field of aluminum profile conveying equipment, in particular to high-strength suspension aluminum profile conveying equipment for suspension supporting. The equipment comprises a support, an adjusting structure, a hoisting structure, a guide structure, an oiling structure and a cleaning structure. By arranging the adjusting structure at one end of the support, aluminum profiles with different lengths can be suspended, the suspended aluminum profiles can be stably hoisted and conveyed in cooperation with work of the hoisting structure, therefore stacked aluminum profiles can be conveniently transferred and conveyed, time and labor are saved, and operation is convenient; and two mounting seats slide inside a fixing sleeve in a mirror image relation through two first springs, one guide wheel rotates at each of the opposite ends of the two mounting seats, a steel cable can penetrate through the space between the two guide wheels in the releasing and retracting processes, the two guide wheels tightly abut against the steel cable under the elastic force action of the first springs, therefore the steel cable can be guided, the steel cable can be released and retracted conveniently, and the stability of the steel cable is guaranteed.

The invention belongs to the technical field of mold maintenance, and particularly relates to surface oiling rust-proof equipment suitable for maintenance of injection molds. The surface oiling rust-proof equipment comprises a rust-proof oiling recovery box, an injection mold surface oiling base box is arranged on the top of the rust-proof oiling recovery box, and a first supporting frame is arranged at a feeding port of the injection mold surface oiling base box. By arrangement of the injection mold surface oiling base box, on one hand, a mold needing to be maintained and oiled can be conveyed into the injection mold surface oiling base box through a conveying belt, the conveying belt is used for conveying the mold, the characteristics of being simple in structure and convenient to transport are achieved, the mold can be conveniently conveyed, and the manual workload is saved; and on the other hand, a sealing cover plate is arranged and can be used for achieving a sealing protection effect in the process of carrying out surface oil spraying on the mold, and the circumstance that oil spraying mist overflows out of the injection mold surface oiling base box during oil spraying maintenance in the injection mold surface oiling base box, and consequently the environment is polluted is prevented.

The invention discloses a waterproof and dampproof structure for an LED underwater lamp. The waterproof and dampproof structure comprises a waterproof lamp cover, a waterproof lampshade, a waterproofshell and a base. The waterproof lampshade is mounted on the waterproof lamp cover, and a waterproof ring is arranged between the waterproof lamp cover and the waterproof lampshade. The waterproof lamp cover and the waterproof shell are locked through a locking mechanism formed by a fastening bolt and a fastening collar, and a sealing ring is arranged between the waterproof lamp cover and the waterproof shell. A sealed containing cavity with the LED lamp mounted inside is formed between the waterproof lamp cover and the waterproof shell, super absorbent resin is arranged around the LED lamp, and the waterproof shell is connected with a wire containing pipe. The wire containing pipe is connected with the base through a support, a water-steam exchange channel with an end cap is arranged on the base, and a water amount detecting device is mounted in the base. The waterproof and dampproof structure is simple in structure, safe, reliable, easy to assemble and convenient to repair, and has high waterproof and dampproof capacity.

The invention discloses a worm wheel type slewing bearing capable of achieving opposite rotational motion of internal and external teeth, and belongs to the technical field of slewing bearings. The worm wheel type slewing bearing capable of achieving opposite rotational motion of internal and external teeth comprises an outer ring, a middle ring and an inner ring. A roller way between the outer ring and the middle ring and a roller way between the inner ring and the middle ring are both provided with steel balls and isolation blocks. The outer ring gear teeth are machined on the outer ring. The inner ring gear teeth are machined on the inner ring. The outer ring gear teeth are in a worm wheel type, and the inner ring gear teeth are in a dual-diameter-pitch mode. Hyperbola sealing grooves are correspondingly machined in the combination face between the outer ring and the middle ring and the combination face between the middle ring and the inner ring respectively. A dual-lip sealing ring is installed inside each sealing groove. The slewing bearing can meet the requirement of the industries of entertainment machines, light industry machines, filling machines and the like for two-way rotational motion, and can bear the large turnover torque, the abrasion resistance of the gear teeth is remarkably improved, the installation between the sealing ring and the slewing bearing is firmer, the slewing bearing is not likely to fall down, and the service life of the slewing bearing is greatly prolonged.

The invention provides a spray drying machine used for solid dye production. The spray drying machine used for solid dye production comprises a supporting pedestal plate, a drying tank, supporting columns, an atomizer, a dye liquid inlet pipe, a nozzle, a hot air conduit, a discharge valve, a blower fan, a cold air purifying filtering tank structure, an anti-blocking hand-operated material overturning sheet structure, a discharging airborne-dust-prevention cyclone separator structure, an ultrasonic vibration particle shaking-off ring structure, an air heating tank structure, a gas guiding connecting pipe, a secondary separation conduit, a collecting tank, an induced draught fan, and an exhaust gas discharge connecting pipe. According to the spray drying machine, a purifying tank, a sealingtank bovver, an air inlet pipe, a stainless steel pipe filter screen, a nylon filter screen, and a HEPA filter layer are adopted, so that it is beneficial for filtering impurity removing of dried air, and filtering purifying of particles or harmful gas in the air is realized; a hand-operated rocking bar, a material overturning sheet, a ball bearing, a hand-operated wheel, and a handle are adopted, so that it is beneficial for dredging and blocking prevention in discharge process of dried solid dye particles.

The invention provides an intelligent environment-friendly solid insulation ring main unit. The intelligent environment-friendly solid insulation ring main unit comprises a solid insulation ring mainunit main body, a mounting base plate, a fixed foundation bolt, a separator, a cable wiring chamber, a movable electric appliance fixing plate structure, an anti-seismic support rod structure, a safety protection control door structure, an electric appliance wiring chamber, a protection cover, an intelligent ventilating fan, a bottom sealing door, ventilating meshes, a sealing mechanical lock, a fixed mount, a slide rail plate and a limit stop block. The solid insulation ring main unit main body is in bolted connection with the middle position of the upper surface of the mounting base plate. The arrangement of electric appliance mounting bolt holes, a vertical support rod, a top portion mounting plate and a fixed cutting facilitates improvement of mounting convenience of the electric appliance, and an upper portion fixed ear plate, an anti-knock rod, a cache supporting tube, a spacing neck hole, a lower portion fixed ear plate and a spring buckle facilitates are arranged so that the effect of shock absorption and buffering is achieved when the ring main unit shakes due to vibration, and the ring main unit is prevented from toppling.

The invention discloses a cabling waterproof device for internal force measurement data cables for a tunnel lining structure and an application method. The device comprises a cylindrical pipe body; apipe cap is arranged at the upper end of the pipe body and comprises a cap body; the middle of the cap body is connected to a cap cover in a threaded mode; a bottom cover is connected to the lower part of the pipe body; a rubber sleeve sleeves the outer side of the bottom cover; a plurality of cable passing holes are formed in the positions, corresponding to the rubber sleeve, of the bottom cover;the lower side surface of the bottom cover is an inwards-concave cambered surface; and the upper side surface and the lower side surface of the bottom cover are each coated with a waterproof coating.The application method comprises the step that the specification and the number of required cabling waterproof devices are determined according to the mounting condition of a bar-mat reinforcement and the number of the measurement data cables in the lining structure. According to the cabling waterproof device and the application method, the problem that in the prior art, the problem that water seepage of data cables cannot be effectively prevented can be solved, the structure is reliable, and the use is convenient.

The invention discloses an energy saving security controller for an electric welding machine. The energy saving security controller for the electric welding machine structurally comprises a waterproofliquid crystal display screen, a hand lifting rod, a control panel, an electric welding host, ground feet, cooling holes, an electric welding machine plug hole, a speed adjusting rotator, a power switch and a prompting lamp; the waterproof liquid crystal display screen is electrically connected with the control panel through a single-chip microcomputer; the prompting lamp is electrically connected with the single-chip microcomputer in the control panel; the cooling holes and the electric welding host are of an integrated structure; the bottom of the electric welding host is welded to the topsof the ground feet; the electric welding machine plug hole is embedded in the electric welding host; and the speed adjusting rotor is electrically connected with the power switch through the controlpanel. According to the energy saving security controller for the electric welding machine, the structure is provided with the waterproof liquid crystal display screen which is connected with the electric welding host, the waterproof liquid crystal display screen can prevent the outside water from entering the display screen, and a sealing and protecting role is played on parts in the liquid crystal display screen, so that it can be avoided that parts in the liquid crystal display screen are damaged.

The invention relates to the field of water conservancy project dam construction, and particularly discloses a water conservancy project dam foundation anti-seepage reinforcement construction technology which comprises the following steps that S1, a foundation trench is excavated in the ground below a gate of a dam; S2, the bottom of the foundation trench is tamped through mechanical equipment; S3, a fixing pile is driven into the bottom of the compacted foundation trench, and a plurality of tensile fixing plates are arranged on the circumferential surface of the fixing pile; S4, building formworks are built above the foundation trench according to the actual construction shape of the dam foundation at the gate, and the fixing piles and the tensile fixing plates are located in a construction cavity defined by the building formworks; S5, concrete and cement paste are injected into the construction cavity, and a gate dam foundation is formed; and S6, an anti-seepage sealing plate is fixedly installed at the joint of the gate dam foundation and the water area ground, and the back face of the anti-seepage sealing plate is filled with waterproof sealant and cement paste. Through the process, the problem that the bottom of the gate dam foundation is damaged due to the fact that the bottom is scoured by flood flow is solved.

The invention discloses a debris flow alarm and a use method thereof. The debris flow alarm comprises a debris flow alarm box, a lower baffle, a support connecting plate, a standby storage battery, aprotective box door, an installation fixing plate structure with a good stable effect, a rain-shading and sun-shading alarm protective cover, an anti-shaking control plate structure, an observation window, a mechanical lock, a sealing strip, a locking lock catch, a fluorescent adhesive strip, a reserved tool box, a shock absorption cushion and the like. The debris flow alarm and the use method thereof have the advantages that the arrangement of a supporting column, a locking hand wheel, fixed iron thorns, threaded holes and a main fixed thorn rod is conductive to installing and fixing the alarm, thereby increasing the stability of the alarm; the rain-shading and sun-shading alarm protective cover specially adopts a PVC plastic housing, thereby playing a role of rain-shading and sun-shadingprotection, and protecting the safety of the alarm box; the arrangement of a rainfall amount detector meter and a debris vibration sensor is conductive to monitoring the rainfall amount and the flowrate of debris flow; the arrangement of a display, a control host and an alarm sounder is conductive to collecting monitoring data and giving an alarm when dangers occur.

The invention discloses a nested tool magazine of a numerical control machine tool, relates to the technical field of tool magazines of machine tools, and aims to solve the problems that when an existing tool magazine is used, tools are exposed outside, external dust easily enters the tools, the use of the tools is influenced, some sweeps and dust are attached to the tools after the tools are used. The nested tool magazine comprises a circular cover, wherein the front side of the circular cover is provided with an opening, and a first gear disc is rotationally installed on the upper surface of the interior of the circular cover. According to the nested tool magazine of the numerical control machine tool, when a tool is not used, the circular cover can be sealed, the tool on the first gear disc is sealed and protected, external dust can be prevented from entering the tool, meanwhile, people are prevented from touching the tool by mistake, and the safety is improved. When the tool needs to be used, the circular cover can be opened, and the circular cover can be sealed again after the tool is taken out.

The invention provides a window mirror device for a high-temperature processing environment, which comprises a front observation panel, a first packaging cover plate, a second packaging cover plate and an external shell, wherein the external shell is of a through hole structure, the front observation panel is arranged on the front side of the external shell, and the first packaging cover plate and the second packaging cover plate are arranged on the upper side and the lower side of the external shell; a window mirror is arranged in the outer shell, the window mirror is a vacuum array layer composed of multiple layers of low-radiation glass, and corrugated thermal compensators with clamping grooves are arranged on the periphery of the window mirror; the side edge of the low-radiation is installed in a clamping groove of the corrugated thermal compensator, and the corrugated thermal compensator and the low-radiation glass are bonded through high-temperature glue. The corrugated thermal compensator balances the thermal stress deformation of the observation mirror glass at high temperature, and prolongs the service life of the observation mirror glass; and comprehensive heat preservation and thermal insulation and visual field observation in a high-temperature processing environment are facilitated, and the application market is great.

The invention discloses an automatic stop protection device for a sized warp library. The automatic stop protection device comprises a fixing frame, wherein a lifting groove is formed in the verticalend of the fixing frame, a mounting plate is arranged in the lifting groove, a lifting driving assembly for driving the mounting plate to ascend and descend along the inner wall of the lifting grooveis arranged on the fixing frame, a mounting groove is formed in the outer surface of the mounting plate, a light sensor is embedded in the mounting plate, sliding grooves are formed in the positions,located on the upper side and the lower side of the mounting groove, of the mounting plate, sliding covers slide in the sliding grooves, connecting rods are arranged on the outer walls of the two sides of each sliding cover, and sealing plates are arranged at the tail ends of the connecting rods. The protection device adopts the real-time detection mode of the light sensor and can realize automatic stop protection in time when the sized warp library is not operated by people, the situation that a driving machine in the sized warp library breaks down when unwatched is avoided, misoperation canbe avoided in combination with the lifting and sliding sealing modes, and the operation safety of the sized warp library is greatly improved.

The present invention relates to a non vacuum high temperature solar selective absorbing coating composite anti-reflection coating and a preparation method thereof, wherein the method comprises the following steps: (1) preparing A1203 colloidal sol and Sn02 colloidal sol; (2) putting the sample into A1203 colloidal sol to form A1203 film via sol-gel dip-coating and heat treatment; after curing and polishing of the A1203 colloidal sol, doing sol-gel dip-coating for anther time, and keeping the A1203 colloidal sol unthickened and completely sealed; putting the sample plated with A1203 film into Sn02 colloidal sol to form Sn02 film via sol-gel dip-coating and heat treatment, and keeping the thickness of the Sn02 colloidal sol when doing sol-gel dip-coating for another time after polishing the surface with flannelette, whereby the composite anti-reflection coating is obtained. The present method has high infrared reflectivity, prolonged service life of the coating, and is suitable for medium-high temperature working environment. Additionally, the bi-layer thin film has simple preparation technology, easy controlling, short production cycle and convenient operation.

The present invention discloses a clamping bracket for laying of building cables and building wires. The clamping bracket comprises a fixed plate, two ends of the internal portion of the fixed plate penetrate and are connected with expansion bolts, a clamping plate is clamped and fixed at the external surface wall of one side of the fixed plate, a spring is arranged at the external surface wall ofa hanger, a contact head is elastically connected with the outer side of the spring, location grooves are arranged at regular intervals at the upper surface of the hanger, connection rods are clampedand fixed at the internal portions of the location grooves, clamping tubes are welded at the outer sides of the horizontal ends of the connection rods, elastic net covers are arranged at the upper surfaces of the clamping tubes, flexible glue pads are arranged at the internal surface walls of the clamping tubes, glue injection tubes are welded at the outer sides of one sides of the clamping tubes, and auxiliary supports are welded at the external surface surfaces of the outer sides of the clamping tubes and located below the connection rods. The clamping bracket integrally employs a splicingassembling mode to facilitate transportation and carrying processing, ensure the clamping seal stability of the cables and the wires and have high practicability.

The invention relates to a rod pit warning device. The device comprises a cover plate and a fixing column, a mounting sleeve is arranged at the bottom end of the cover plate, a locking assembly is movably connected to the mounting sleeve, and a warning assembly is arranged on the fixing column. The device has the following advantages: the locking assembly is triggered to lock the cover plate on the foundation pit of a rod pit through the matching of the fixing column and the mounting sleeve, so the cover plate can be locked without adding extra fastening parts, thereby the mounting process ofthe cover plate is simplified, and the mounting cost and the mounting working intensity are reduced; the warning assembly is arranged on the fixing column, so the installed cover plate can play a rolein sealing and protecting the rod pit and can also play a role in warning pedestrians or vehicles through the warning assembly; and when the fixing column is separated from the mounting sleeve, the locking assembly is triggered to be opened, so that the cover plate can be rapidly opened, and the overall installation and detachment process is simplified.

The invention belongs to the technical field of desert planting, and particularly relates to a fertilizer irrigation method and device for desert planting. The fertilizer irrigation device comprises a main body and a supporting cover, wherein a water inlet used for water inflow is formed in the right end of the main body, and a pipe storage box used for storing a water pipe is arranged at the left end of the main body. Through the arrangement of the supporting cover, a sealing cover is arranged at the upper end of the supporting cover, a protective cover is arranged at the front end, the lower end is fixedly connected with the upper end of the main body, the main body is sealed and protected through the arrangement, and the service life of the instrument is prolonged; and through arrangement of an adjusting sleeve, an adjusting rod is connected with the water pipe through a flow limiting block, the distance between the flow limiting block and the water pipe is controlled through screwing of the adjusting rod, so that the water flow is controlled, the precision of nutrient irrigation is improved, and waste of nutrients is effectively reduced; and by arranging a transmission shaft, a motor is connected with blades through the transmission shaft, and the contact area between the blades and irrigation water is increased, therefore, the stirring effect is improved, and the irrigation water and the fertilizer are fully fused.

The invention relates to the technical field of agricultural machinery autonomous operation, in particular to an agricultural machinery autonomous operation device based on Beidou high-precision positioning and a using method, the agricultural machinery autonomous operation device comprises a fixing plate, a main body mechanism is arranged on the fixing plate, a butt joint mechanism is arranged on the main body mechanism, and a driving mechanism is arranged on the fixing plate and the main body mechanism jointly. A mounting mechanism is arranged in the fixing plate, and a sealing mechanism and a limiting mechanism are arranged on the butt joint mechanism; through the sealing mechanism, a sealing protection effect on a plugging part on the signal plugging assembly can be conveniently achieved when the signal plugging assembly on the butt joint mechanism is in butt joint, and some dust, dirt and water stains are prevented from permeating into the plugging part; through the limiting mechanism, the connection between the signal connecting plug and the terminal stud can be conveniently limited and clamped, and the situation that the signal connecting plug and the terminal stud are loosened and even fall off in the long-term use process is avoided; and through cooperation of the driving mechanism and the mounting mechanism, the whole device can be directly clamped and mounted on the corresponding part of the agricultural machine body conveniently during use.

The invention discloses a fine adjustment device for the tunneling angle of a shield machine. When an angle controller of the fine adjustment device controls and adjusts the angle, the angle controller first adjusts the angle to a required angle by using a hydraulic cylinder, then in the tunneling process, a telescopic compensation assembly is responsible for compensating the displacement expansion-and-contraction value of the hydraulic cylinder caused by a tunneling force according to the real-time detection value of an angle detecting assembly, the tunneling precision can be greatly improved, and the adjustment efficiency of the tunneling angle is ensured. A splicing assembly method of four branch connecting blocks is adopted to realize the split type assembly effect of a tunneling plate, when scrapper blades on the tunneling plate are damaged, only scrapper blades on the branch connecting blocks at the corresponding positions are replaced while self-stability of the tunneling plateis ensured, and trouble brought by the overall replacement of the tunneling plate is avoided. The independent fine adjustment effect of the tunneling angle of the scrapper blades on the tunneling plate is realized, so that adjustment operation of the tunneling angle of the scrapper blades at different positions can be independently realized, and the tunneling angle of the scrapper blades is greatly improved.

The invention discloses a portable automatic insulin injection device with the blood glucose measuring function. The portable automatic insulin injection device comprises an insulin pump body for supplementing the content of insulin in the body of a user, a shell is fixedly connected to the right side of the insulin pump body, a through hole is formed in the right side of the shell, and a first leather hose is fixedly connected to the right side of the shell through the through hole; the end, away from the insulin pump body, of the first leather hose is buried under the skin of a user, a fixed shaft of the bottom of the inner wall of the shell is rotationally connected with a first shaft driven by a power mechanism to rotate, the bottom of the inner wall of the shell is fixedly connected with a first supporting plate and a second supporting plate, and a first piston cylinder and a second piston cylinder are arranged in the shell. According to the portable automatic insulin injection device, through cooperative use of the structures, the problems that in the actual use process, in the use process of a traditional portable automatic insulin injection device with the blood glucose measuring function, operation is complex, blood glucose is difficult to measure rapidly, and inconvenience is brought to use are solved.

The invention discloses a bell valve self-lifting system and a working method thereof. The bell valve self-lifting system comprises a triangular support; a hydraulic oil cylinder is fixed to the triangular support; the hydraulic oil cylinder is connected with a high pressure cylinder intelligent controller; the high pressure cylinder intelligent controller is connected with a PLC control system; avertically distributed suspension rod is connected and fixed to the power output end of the hydraulic oil cylinder; a plurality of first fixing blocks are uniformly distributed at the bottom end of the triangular support at equal angles; a top cover is fixedly arranged at the bottom ends of the first fixing blocks by screws; a packing sealing box is fixedly arranged at the middle part of the topend of the top cover; one end, of the suspension rod penetrates through the packing sealing box and the top cover, and is sleeved with and is fixedly provided with a connecting seat; and the outer surface of the side wall of the connecting seat is connected with a bell through a plurality of suspension chains distributed equidistantly. The extension and contraction of the hydraulic oil cylinder isprecisely controlled through the PLC control system, so that accurate control on the opening-closing degree of a bell valve is realized, the opening of the bell valve can be displayed on a computer during remote control, the sealing effect between the bell and a bell seat is good, and thus smoke can be effectively prevented from entering the bell valve.

The invention discloses an annular load box for a self-balance method. The annular load box comprises an upper annular steel plate, a lower annular steel plate, an outer ring baffle, an inner ring baffle and a pressure device. The pressure device comprises a plurality of annular oil cavity expansion units which are overlapped in an up-and-down mode and communicate with one another, the annular oil cavity expansion unit located at the uppermost position is connected with the upper annular steel plate and can be connected with a hydraulic loading device, and the annular oil cavity expansion unit located at the lowermost position is connected with the lower annular steel plate; an outer annular filling cavity is formed among the upper annular steel plate, the lower annular steel plate, the outer ring baffle and the pressure device, and an inner annular filling cavity is formed among the upper annular steel plate, the lower annular steel plate, the inner ring baffle and the pressure device; the load box is further provided with a grouting valve block, the grouting valve block is provided with a grouting opening, a pipe cavity, a first grout outlet and a second grout outlet, the grouting opening, the pipe cavity, the first grout outlet and the second grout outlet are mutually conductive, and the first grout outlet and the second grout outlet communicate with the outer annular filling cavity and the inner annular filling cavity separately. The annular load box has the advantages that cost is saved, and meanwhile detection stability is guaranteed.

The invention discloses a worm wheel type slewing bearing capable of achieving opposite rotational motion of internal and external teeth, and belongs to the technical field of slewing bearings. The worm wheel type slewing bearing capable of achieving opposite rotational motion of internal and external teeth comprises an outer ring, a middle ring and an inner ring. A roller way between the outer ring and the middle ring and a roller way between the inner ring and the middle ring are both provided with steel balls and isolation blocks. The outer ring gear teeth are machined on the outer ring. The inner ring gear teeth are machined on the inner ring. The outer ring gear teeth are in a worm wheel type, and the inner ring gear teeth are in a dual-diameter-pitch mode. Hyperbola sealing grooves are correspondingly machined in the combination face between the outer ring and the middle ring and the combination face between the middle ring and the inner ring respectively. A dual-lip sealing ring is installed inside each sealing groove. The slewing bearing can meet the requirement of the industries of entertainment machines, light industry machines, filling machines and the like for two-way rotational motion, and can bear the large turnover torque, the abrasion resistance of the gear teeth is remarkably improved, the installation between the sealing ring and the slewing bearing is firmer, the slewing bearing is not likely to fall down, and the service life of the slewing bearing is greatly prolonged.