971results about How to "Play a buffering effect" patented technology

An IoT data acquisition system for intelligent industrial equipment and an uploading method for acquired data are provided. The IoT data acquisition system comprises data acquisition equipment connected with the intelligent industrial equipment and a cloud server connected with the data acquisition equipment; wherein the cloud server comprises a message receiving module, a message distribution module, a message processing module cluster consisting of a plurality of message processing modules, an asynchronous message processing module, a data model processing and building module, and a database; and the message distribution module is used for acquiring a message distribution rule from the data model processing and building module, and distributing equipment data to the message processing modules of the message processing module cluster according to the message distribution rule.

The invention discloses a four-foot-swing wall-climbing robot with a driven waist joint. The wall-climbing robot comprises four telescopic foot modules, an upper body part, a lower body part and a tail module; the telescopic foot modules are active motion modules and each composed of a steering engine and a transmission mechanism, each transmission mechanism is formed by bevel gears and a crank slide bar mechanism to transmit power of the corresponding steering engine, and then four telescopic legs can do linearly telescopic motion. The four telescopic foot modules are connected with the left side and the right side of the upper body part and the left side and the right side of the lower body part respectively. The upper body part and the lower body part are internally provided with cavities used for installing a control panel and a battery and are connected through the waist joint. The waist joint does passive motion, and the robot can climb a wall or walk through active motion of telescopic feet of skew symmetry. The wall-climbing robot has the advantages that the overall structure is compact and flat and high in stability; the ratio of the upper body to the lower body can be adjusted according to optimization needs; changes of mass center motion tracks and foot end force of climbing animals can be fitted, and the motion speed of the four-foot-swing wall-climbing robot with the driven waist joint is effectively increased.

The invention discloses a clinical compressing and quick bleeding stopping device for the cardiology department. The device comprises a stable tray, a column is fixedly welded to the middle of the upper surface of the stable tray, and an installing groove is formed in the top of the column; a rotating motor is fixedly installed in the installing groove, a first connecting piece is fixedly installed on an output shaft of the rotating motor, and an electric telescopic rod is fixedly installed on the output shaft of the rotating motor through the first connecting piece. According to the clinicalcompressing and quick bleeding stopping device for the cardiology department, the mechanical operation is utilized for applying pressure to the punctured part of the artery of a patient, therefore bleeding is quickly stopped by utilizing compression, it is avoided that in the past, bleeding needs to be stopped manually through compression, and pressure applied to the punctured part of the artery of the patient can be accurately controlled so that the punctured part of the artery can be accurately and effectively compressed to stop bleeding; the operation is convenient, both time and labor aresaved, and the bleeding stopping effect is better.

The invention discloses a mechanical clamping jaw for machinery manufacturing. The mechanical clamping jaw comprises a supporting plate, a supporting block is fixed to the supporting plate, and a hydraulic cylinder is fixed to the supporting block; a boss is arranged on the supporting plate, a sliding groove is formed in the boss, a limiting sliding column is installed in the sliding groove, and gear teeth are arranged on the limiting sliding column; and a first gear disc and a first connecting arm are installed on the boss, a second gear disc and a second connecting arm are installed on the boss, one end of the first connecting arm is fixedly connected with the first gear disc, one end of the second connecting arm is fixedly connected with the second gear disc, a first clamping jaw arm ishinged to the other end of the first connecting arm, a second clamping jaw arm is hinged to the other end of the second connecting arm, a third connecting arm is hinged to the first clamping jaw arm,and a fourth connecting arm is hinged to the second clamping jaw arm. According to the mechanical clamping jaw for machinery manufacturing, the problem that an article is prone to being damaged by the mechanical clamping jaw is solved, and the stability of power source transmission is guaranteed.

The invention discloses a passive energy-storage ankle joint and foot mechanism for power-assisted exoskeletons of lower limbs. The passive energy-storage ankle joint and foot mechanism comprises an ankle joint unit, a foot-side panel unit and a foot pad unit, wherein the ankle joint unit comprises a crus rod and a compression spring and an ankle-joint guide rod; the compression spring and the ankle-joint guide rod are arranged in the crus rod; the foot-side panel unit comprises a foot-side panel, a foot pad and a wavy spring body; the foot-side panel comprises a side plate and a bottom plate; the foot pad and the wavy spring body are arranged at the lower end of the bottom plate; an arc-shaped surface is arranged on the side plate; the lower end of the crus rod is hinged on the side plate; and the lower end of the ankle-joint guide rod is contacted with the arc-shaped surface under the action of the compression spring and moves along the arc-shaped top surface. The passive energy-storage ankle joint and foot mechanism disclosed by the invention has the advantages that the foot structure of a human body, the human body and the mass and the inertial action of the exoskeletons are fully utilized, the passive energy storage of the ankle joint and the bottom-touching energy storage of the bow-shaped sole in the traveling process are realized, the wearing is comfortable, the energy storage is low and the practicability is strong.

The invention discloses a rain water system for building districts of sponge cities. The rain water system is characterized by comprising a sedimentation pond, a distribution well, a treatment pond and overflow wells, wherein an environment-friendly rain water opening is formed in a position above the sedimentation pond, the sedimentation pond is connected with the distribution well through a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, at least four distribution pipes are arranged on the left end surface of the distribution well, the distribution well is connected with the treatment pond through the distribution pipes, and the treatment pond is connected with the overflow wells through overflow pipes. A construction method of the rain water system comprises the following steps: (1) performing construction preparation; (2) excavating foundation pits; (3) performing foundation treatment; (4) building the sedimentation pond and the distribution well; (5) building the treatment pond and the overflow wells; (6) laying pipelines; and (7) performing ground treatment. The rain water system disclosed by the invention is simple in structure and high in practicability, and is used for collecting and treating rain water on the ground of building districts, so that the phenomenon of water accumulation on the ground of the districts is effectively avoided; and besides, rain water is collected, so that waste of water resources can be reduced.

The invention relates to the technical field of building device damping, and discloses a building device with an efficient damping function. The building device with the efficient damping function comprises a mounting bottom frame, wherein a device body is arranged inside the mounting bottom frame; and buffering cylinders are fixedly connected to the left side and the right side of the inner bottom wall of the mounting bottom frame, a buffering plate is arranged in the two buffering cylinders respectively, a buffering rod is fixedly connected to the tops of the two buffering plates respectively, and both the top ends of the two buffering rods penetrate through and extend to the tops of the buffering cylinders. According to the building device with the efficient damping function, when the device body is vibrated, buffering springs and compression springs can effectively play a role in buffering through the buffering cylinders; and when the device body is vibrated, connecting cylinders can be pressed downwards, the friction force between bearing blocks and vertical rods can be reduced through first pulleys, and extrusion springs can well play a role in buffering so that the buildingdevice can be more efficiently subjected to vibration reduction.

The invention relates to the field of unmanned aerial vehicles, in particular to an anti-crash type aerial photographing unmanned aerial vehicle capable of automatically controlling drop speed. The anti-crash type aerial photographing unmanned aerial vehicle comprises a mainframe, wherein a plurality of wing brackets are symmetrically arranged at the two sides of the mainframe, the mainframe and the wing brackets are of an integral forming structure, and a power device mounting cavity is fixedly mounted at the side, far from the mainframe, of each wing bracket. According to the anti-crash type aerial photographing unmanned aerial vehicle capable of automatically controlling drop speed, by additionally arranging an air pressure compression device, air compression and jetting are carried out; by additionally arranging a jet head at the bottom of the mainframe, force which is opposite to a drop direction is applied, so that drop speed is reduced, and a buffering effect is realized; by additionally arranging a buffering limiting frame and a shock absorbing limiting frame, the direct contact of the mainframe with the bottom surface is avoided, and damage risk is reduced; and by additionally arranging shock absorbing springs, buffering springs, sliding limiting components and shock absorbing rollers, multiple buffering treatment is carried out, and the retracting step of the unmanned aerial vehicle is more stable and safe.

The invention belongs to the technical field of construction, and particularly relates to a water absorption floor tile. The water absorption floor tile comprises a tile body; a sliding groove is formed in the upper end of the tile body, and a floating plate is slidably arranged in the sliding groove; a first permanent magnet ring is arranged at the lower end of the floating plate in an embedded mode, and a second permanent magnet ring is arranged on the bottom side wall of the sliding groove in an embedded mode; the first permanent magnet ring and the second permanent magnet ring achieve homopolar repulsion; a water storage tank is arranged at the bottom of the sliding groove, and a tank opening of the water storage tank is fixedly connected with a limiting plate; a plurality of water absorption pipes are fixedly connected to the floating plate in a penetrating mode; one-way entering valves are fixedly connected to the water absorption pipes; through holes matched with the water absorption pipes are formed in the limiting plate, and the lower ends of the water absorption pipes penetrate through the through holes and are fixedly connected with horizontally-arranged drainage pipes;one-way discharge valves are fixedly connected to the two ends of the drainage pipes correspondingly; and the side walls of the drainage pipes fixedly communicate with a plurality of elastic corrugated pipes, and the upper ends of the elastic corrugated pipes and the lower surface of the limiting plate are fixedly connected. The water absorption floor tile is good in water absorption effect, can achieve the high anti-slipping effect, and meanwhile is high in buffering property and good in comfort.

The invention relates to the technical field of constructional engineering, and discloses a fixing device for pipelines for constructional engineering. The fixing device comprises a fixing frame. Theleft side and the right side of the bottom of the fixing frame are fixedly connected with threaded pipes, the interiors of the two threaded pipes are in threaded connection with threaded rods, the opposite sides of the two threaded rods are fixedly connected with rotary handles, and the opposite ends of the two rotary handles are sleeved with anti-skid sleeves. A cover plate is arranged on the topof the fixing frame, and the right side of the cover plate is hinged to the fixing frame through a hinge. According to the fixing device for the pipelines for constructional engineering, the pipelines can be lifted up through an arc-shaped supporting plate, friction between the fixing device and the pipelines can be increased through an oblique plate, when the pipelines vibrate, the supporting plate is pressed downwards, a sliding block slides in a sliding groove, a pressed spring can achieve a good buffer effect, contact between the arc-shaped supporting plate and the pipelines can be tighter through extension of a hydraulic telescopic rod, and the pipelines for constructional engineering can be more effectively subjected to shock absorption.

The invention relates to the technical field of a mobile phone protecting shell, specifically a phase-change temperature control mobile phone shell. The phase-change temperature control mobile phone shell comprises a graphite pad, a shell with phase-change material and a metal sheet. The graphite pad is closely stuck at the inner side of the shell with the phase-change material. The metal sheet is embedded at the outside of the shell with the phase-change material. The phase-change temperature control mobile phone shell of the invention integrates the functions of heat conduction, heat storage and heat dissipation and could ensure the temperature of a mobile phone to hold at the normally operated temperature when the mobile phone dissipates a lot of heat. The phase-change temperature control mobile phone shell of the invention not only adds the heat conduction and the heat dissipation of the mobile phone shell, but also improves beauty of the mobile phone shell by using the metal sheet simultaneously.

The invention discloses a rigidity-adjustable multi-dimensional passive compliance device which comprises an upper part and a lower part. A groove is formed in the lower part, and a flexible tail end is arranged in the groove. An upper supporting mechanism is arranged on the upper part, and a plurality of lower supporting mechanisms are arranged on the lower part. The upper supporting mechanism comprises an upper working fluid cylinder, an upper fluid storing cylinder, an upper ejector and an upper working fluid cylinder spring, the upper fluid storing cylinder communicates with the upper working fluid cylinder, and an upper fluid storing cylinder piston set and an upper fluid storing cylinder spring are arranged in the upper fluid storing cylinder. Each lower supporting mechanism comprises a lower working fluid cylinder, a lower fluid storing cylinder, a lower ejector and a lower working fluid cylinder spring, wherein the lower fluid storing cylinder communicates with the lower working fluid cylinder, a lower fluid storing cylinder piston set and a lower fluid storing cylinder spring are arranged in the lower fluid storing cylinder, and the upper working fluid cylinder and the lower working fluid cylinder are both filled with viscosity-adjustable fluid. During work, the flexible tail end can move in the groove in any direction, multi-dimensional compliance movement is achieved, and the adjustable rigidity is achieved through the viscosity-adjustable fluid.

The invention relates to a plate positioning device on a bending machine, which can avoid the influence of inertia generated during plate feed-in on the position of a stop pin to improve positioning accuracy. The plate positioning device is arranged on the front and / or rear part of a workbench of the bending machine, and comprises a support, a movable frame, a screw rod which is arranged on the support and is used for driving the movable frame to move back and forth, the stop pin and a pneumatic buffer compensating device, wherein the stop pin is arranged on the movable frame, and a work surface of the stop pin faces a blade of the bending machine; and the movable frame is connected with the screw rod by the pneumatic buffer compensating device. After the stop pin on stopping materials is subjected to the impact force of plates, the impact force can be transferred to a ball screw rod, so that the ball screw rod can be damaged to finally cause the invalidation of the positioning accuracy finally. Therefore, the impact force is prevented from being acted on the ball screw rod directly by utilizing the pneumatic buffer compensating device, so that when the screw rod is subjected to the impact force, the accuracy of the screw rod is not influenced. The plate positioning device has the advantages of high accuracy, high impact resistance, long service life and the like.

The invention discloses an ostrich-like robot walking mechanism. The mechanism comprises a torso, a thigh bone, a shin bone, an accessory metatarsal bone, a middle connecting rod and toes; a first camis fixed to the torso, the thigh bone is connected onto the torso in a hinged mode, a thigh bone push-pull and swinging mechanism is connected between the thigh bone and the torso, a second cam is fixed to the thigh bone, one end of the shin bone and one end of the middle connecting rod are connected with the thigh bone in a hinged mode, and the other end of the shin bone and the other end of themiddle connecting rod are connected with the accessory metatarsal bone in a hinged mode; a shin bone push-pull and swinging mechanism is connected between the thigh bone and the shin bone; the firsttoe is connected with the tail end of the accessory metatarsal bone in a hinged mode, the first toe, the second toe and the third toe are connected in a hinged mode in sequence, and a second toe push-pull and swinging mechanism is connected between the first toe and the second toe; a third toe push-pull and swinging mechanism is connected between the second toe and the third toe; a tension springis connected between the accessory metatarsal bone and the first toe, and a drawstring wound around the second cam and the first cam is connected between the torso and the third toe. According to themechanism, the walking and running gaits of an ostrich are fully imitated, and hitting the ground by legs, leg recovery in the air, leg extension in the air and landing of the toes can be achieved.

The invention relates to an epitaxial wafer for an inverted LED chip and a fabrication method of the epitaxial wafer, belongs to the technical field of epitaxy of a light emitting diode. An n-(Al<x>Ga<1-x>)<0.5>In<0.5>P potential well layer and an n-(Al<y>Ga<1-y>)<0.5>In<0.5>P barrier layer are periodically, alternatively and epitaxially grown during growth of an n-type superlattice, and a p-(Al<x>Ga<1-x>)<0.5>In<0.5>P potential well layer and a p-(Al<y>Ga<1-y>)<0.5>In<0.5>P barrier layer are periodically, alternatively and epitaxially grown during growth of a p-type superlattice. The fabrication process is simple and reasonable, the transverse motion of an electron in an n-(Al<x>Ga<1-x>)<0.5>In<0.5>P current extension layer can be effectively improved by the n-type superlattice, and the luminous efficiency of an AlGaInP epitaxial structure is further improved. With the product fabricated by the method, the luminous efficiency, the photoelectric property and the yield of an AlGaInP-based inverted LED epitaxial wafer can be effective enhanced.

The invention belongs to the field of pumps and particularly relates to a water jet propulsion pump which comprises a pump body and a pump shaft assembly arranged at a pump cavity of the pump body. The pump shaft assembly at least comprises a pump shaft and an impeller wheel arranged on the pump shaft; the pump shaft is of a simply supported beam structure with bearings at the two ends of the pump shaft fixedly connected, the tail end of the pump shaft and a power source of the water jet propulsion pump are in normal-running fit, and the head end of the pump shaft extends in the axial direction and is in bearing fit with a bearing assembly arranged on the pump body; bounded by an impeller wheel body, the water jet propulsion pump is divided into a water inlet area and a water outlet area, wherein the water inlet area is communicated with a liquid inlet of the pump body, and the water outlet area is used for discharging water; a reflux passageway used for reducing the hydraulic thrust at the bearing assembly is arranged between the water inlet area and the water outlet area, and the water inlet area of the pump body, the water outlet area of the pump body, gaps to be lubricated of the bearing assembly and the reflux passageway are sequentially communicated and form a circular flow channel. The water jet propulsion pump is reasonable and practical in structure, wide in working usage range and long in service life, and high-efficiency work of components within the whole water outlet area of the pump body can be effectively guaranteed.

The invention discloses a wave resisting device for an offshore operating platform. The device comprises an air sac component (1) and a positioning component (2) which is used for positioning the air sac component (1) on a platform structural piece, wherein the air sac component (1) comprises at least one long-pipe-shaped air sac (11) which is sleeved on the platform structural piece; the air sac(11) comprises a hose (12) and connecting joints (13) which are arranged at the two ends of the hose (12); and the hose (12) is connected with the connecting joints in a sealed manner(13). The wave resisting device for the offshore operating platform has the advantages of high sea wave buffering property and good protective effects on the offshore operating platform, is safe and reliable, is easyand convenient to use and is quickly maintained.

The invention provides safe and drop-resistant charging equipment, and relates to the field of charging equipment. The safe and drop-resistant charging equipment comprises an outer shell, wherein a buffer plate is arranged in the outer shell, a charging body is inserted to the top of the buffer plate, a USB interface is fixedly arranged in the top of the charging body, the top of the USB interfacepenetrates through the top of an inner wall of the outer shell and extends to an upper side of the outer shell, fixed blocks are fixedly arranged at two sides of the bottom of an inner wall of the outer shell, and a cross rod is fixedly arranged at one side, near to the inner wall of the shell, of each fixed block. In the safe and drop-resistant charging equipment, a sliding sleeve is driven to extrude a first buffer spring by a buffer plate connection rod, so that the first buffer spring generates a counter-acting force, an effect of shock absorption of the charging body during vertical vibration is achieved, an effect of drop resistance is achieved, the charging equipment is prevented from dropping to ground to cause damage to internal equipment and affect the application performance and lifetime of the charging equipment.

The invention discloses a goods storage device with an anti-collision function and a using method, and belongs to the technical field of goods transport. The goods storage device comprises a protection box, wherein the inner bottom wall of the protection box is in threaded connection with a set of first threaded rods, and a first square plate and a second square plate are placed in the protection box. The upper end of each first threaded rod penetrates through the bottom surface of the protection box and extends into the protection box, a pressure regulating mechanism is installed on the right side of the upper surface of the protection box, a square groove is formed in the middle of the upper surface of the protection box, and a pressurizing mechanism is installed at the inner bottom of the square groove. According to the device, through cooperative arrangement of the first threaded rods, the first square plate, the second square plate, a telescopic spring, a protection plate, a first pressure spring, an air bag and a pressurizing mechanism, the application range of the device is enlarged, the buffering effect of the device is improved, the damage degree of goods is reduced, and large economic losses are avoided; and by arranging the pressure regulating mechanism, the maximum atmospheric pressure value in the air bag is adjusted, and the application range of the device is enlarged.

The invention discloses a laser welding fixture. The laser welding fixture comprises a workbench, a moving mechanism, two clamping mechanisms and two buffering mechanisms, a groove is formed in the top end of the workbench, the moving mechanism is fixedly installed in the inner part of the groove, the two clamping mechanisms are installed on the moving mechanism, and each clamping mechanism comprises a sliding block, a fixing plate, two limiting blocks, a square groove and a clamping block. According to the laser welding fixture, the two clamping mechanisms are arranged on the workbench, the sliding block, the fixing plate, the square groove and the clamping block are arranged in each clamping mechanism, the sliding block is arranged on the moving mechanism in a sleeving mode, then the fixing plate is moved, the clamping block is moved, clamping can be carried out on a workpiece; meanwhile, a buffering mechanism is arranged on the square groove, and a spring, a telescopic rod, a rubbersleeve and an elastic ball are arranged in the buffering mechanism, so that when clamping is carried out on the workpiece, the buffering effect is achieved, and the workpiece is prevented from beingdamaged by clamping.

The invention discloses a potted plant soil block disengagement preventing logistics box leveled based on earth gravity, and relates to the technical field of logistics transportation. The potted plant soil block disengagement preventing logistics box leveled based on earth gravity comprises a box body, a box cover, a leveling box, a compression spring, a containing plate, first inclined blocks, transmission mechanisms, reset mechanisms and clamping mechanisms. The rear side of the box cover is hinged to the top of the inner rear wall of the box body through a hinge, the leveling box is arranged in the middle of an inner cavity of the box body, and the middle of the inner bottom of the leveling box is fixedly connected with the bottom end of the compression spring. According to the pottedplant soil block disengagement preventing logistics box leveled based on earth gravity, when a potted plant is put in the leveling box, the leveling box can carry out automatic leveling to avoid the condition that the potted plant topples over, meanwhile, a pot body of a flowerpot is fastened through the cooperative arrangement of the transmission mechanisms and the clamping mechanisms, and the problem that soil spills as the potted plant topples over along with toppling of the box body is further avoided.

The invention discloses a shield tunneling machine cutter with a cushion device. The shield tunneling machine cutter comprises a cutter seat fixed on a spoke of a shield tunneling machine cutter disc,and the cutter body installed on the cutter disc, the cutter is provided with a cutter blade, the side edge, close to the heading direction of the cutter, ofthe cutter blade of the cutter is rotatably connected with the cutter seat, the other side edge, the cutter blade away from the heading direction of the cutter, of the cutter and the cutter seat are provided with a gap, and a cushion device is arranged between the other side edge of the cutter and the cutter seat. According to the shield tunneling machine cutter, the cushion device is arranged in the cutter seat, after the blade of the cutter is impacted during working, the cutter can be driven to be rotated around a pin roll, a cushion spring in the cushion device is compressed, time of cutting a hard object by the blade is prolongedin the process, the cushion effect is exerted, the probability of tipping of the blade is reduced, the capability of impact resistance of the cutter is greatly promoted, and the problem that due to the damage of the cutter disc caused by the tipping of a cutter tool, excavation of a shield tunneling machine is affected is solved.

The invention discloses a gear and rack cylinder with the spring buffering function and belongs to the cylinder buffering technical field. A piston and a guide piston are fixedly connected with two ends of a rack respectively; a bolt penetrates a cushion block and the guide piston to enable the guide piston to be fixedly connected with the rack through a baffle plate; a large spring and a small spring sleeve the bolt which is arranged between the inner bottom surface of the guide piston and the cushion block; the inner bottom surface of the guide piston and the cushion block abut against two ends of the large spring respectively and the inner bottom surface of the guide piston and the cushion block abut against two ends of the small spring respectively; the rack is arranged inside a cylinder barrel along with the piston and the guide piston which are arranged at the two ends of the rack respectively; an end cover and a cylinder bottom are connected with two ends of the cylinder barrel respectively. According to the gear and rack cylinder with the spring buffering function, a structure that the cushion block is separated from the guide piston is adopted, the guide piston is not in direct contact with the bottom surface of the cylinder, and accordingly the problems such as the abrasion and the poor sealing effect of the traditional buffer devices are solved.

The invention relates to a hook arm of a buffer load-shedding arresting hook. A connector is arranged at one end of the hook arm, and a hook head is arranged at the other end of the hook arm. An outer cylinder and an inner cylinder are arranged between the connector and the hook head. A main body of the inner cylinder is of a hollow step columnar structure. A main body of the outer cylinder is of a hollow columnar structure. The small end of the inner cylinder extends into the outer cylinder. The hook arm comprises a core rod, wherein one end of the core rod is firmly connected with the outer ends of the connector and the outer cylinder, and the other end of the core rod extends into the inner cylinder; the outer part of the core rod is fixedly sleeved with a second sealing ring which is in interference fit with the inner cylinder; the inner cylinder, the outer cylinder, the core rod, a first sealing ring and the second sealing ring form an oil chamber which is used for accommodating hydraulic oil; a separation plate is arranged inside the large end of the inner cylinder; the separation plate, the inner cylinder, the core rod and the second sealing ring form a buffer cavity; an oil penetration hole is formed in the second sealing ring; the two sealing rings are in sliding fit with the inner walls of the outer cylinder and the inner cylinder respectively; a sliding clearance is formed between the inner end of the outer cylinder and the step of the inner cylinder. The hook arm of the buffer load-shedding arresting hook has the effect of buffering aircraft landing arresting, and is stable in working performance.

The invention belongs to the field of solid pumps, and particularly relates to a combined sealing device for a plunger pump for pumping high-viscosity media such as tar residue. The combined sealing device at least comprises a pump cylinder block with a plunger hole, and a plunger part matched with the plunger hole in a splicing manner, wherein the plunger part can reciprocate linearly along the plunger hole; a cavity defined by the front end of the plunger part and a hole wall of the plunger hole forms a pumping cavity for accommodating and squeezing materials; a sealing unit for filling a fit clearance between the plunger part and the plunger hole is sandwiched between a peripheral wall of the plunger part and the hole wall of the plunger hole; the combined sealing device for the plunger pump further comprises a scrape ring for scraping off the viscous materials from the peripheral wall of the plunger part and / or the hole wall of the plunger hole; the scrape ring is embedded into the hole wall of the plunger hole and / or the peripheral wall of the plunger part is sleeved with the scrape ring in a surrounding manner; the scrape ring isolates the sealing unit from the pumping cavity; and the combined sealing device can realize an effect of high-seal conveying of the solid materials in the combined sealing device, and effectively ensure long service lives of sealing parts in the plunger pump simultaneously.

The invention discloses a fire-fighting elevating mechanism with good stabilizing effect, which comprises a base, the upper end of the base is symmetrically provided with a lifting device, the upper end of the elevating device is fixedly connected with a connecting plate, and the upper end of the connecting plate is provided with There are buffer grooves, and the opposite inner walls of the two buffer grooves are fixedly connected with first limiting blocks, and the opposite end side walls of the two first limiting blocks are provided with first sliding grooves, and the two A placement plate is slidably connected between the first sliding slots, the upper end of the placement plate is provided with a placement slot, the bottom of the placement plate is symmetrically provided with two limiting grooves, and the bottom of the buffer slot is symmetrically provided with two The hollow rods are provided with hollow cavities inside the two hollow rods, and the first springs are provided in the two hollow cavities. The invention has reasonable structural design, simple operation, not only good stability, but also good cushioning effect.

The invention relates to the field of household appliances, in particular to a grinding device for an electric kettle body. The grinding device for the electric kettle body comprises a working table,a loading and unloading assembly, a grinding mechanism, a guiding and pressing assembly and a positioning drive mechanism, wherein the loading and unloading assembly is located on one side of the working table; the grinding mechanism and the positioning drive mechanism are located on the working table; the positioning drive mechanism is formed by a working tank, an upper pressing assembly and a drive assembly; the upper pressing assembly comprises a bearing rotary plate and an inner pressing assembly; a bearing jig is fixedly arranged on the top part of the working tank; the inner pressing assembly is vertically arranged in the center of the top part of the bearing rotary plate; the center part of the bottom part of the bearing rotary plate is in drive joint with the working end of the drive assembly; the guiding and pressing assembly comprises a guiding and pressing column; the grinding mechanism comprises a horizontal moving assembly and a grinding roller wheel; the loading and unloading assembly comprises a loading conveyor line and an unloading conveyor line; and a clamping jig is arranged between the loading conveyor line and the unloading conveyor line. The device only needsto be assembled and disassembled sequentially, so that a product can be processed, and the efficiency is improved.

The invention discloses a die cutting machine with good buffering performance. The die cutting machine comprises a base, an operation platform is fixedly connected at the top pf the base, the top of the operation platform is fixedly connected with a die cutting machine body and provided with a positioning rod, one end of the positioning rod penetrates the operation platform and extends to the outside of the same, the outer surface of the operation platform is fixedly connected with a limiting ring and the outer surface of the positioning rod contacts with the inner wall of the limiting ring; the bottom of the die cutting machine body is fixedly connected with a first transverse plate, the bottom of the first transverse plate is fixedly connected with an annular rubber ring, one end, away from the first transverse plate, of the annular rubber ring is fixedly connected with a second transverse plate, one side face, away from the annular rubber ring, of the second transverse plate is fixedly connected with a first buffering pad, and one side face, away from the second transverse plate, of the first buffering pad is fixedly connected with a powerful spring. Damping effect is improved integrally, vibration amplitude caused by integral operation is reduced, loosening of internal connecting elements is avoided, and accuracy of processing operation is improved.

The invention relates to an impermeable structure applied to a concrete pressure container, which belongs to the technical field of solid engine test, and comprises a concrete wall, steel embedded parts, a steel plate and a glass fiber reinforced plastic coating, wherein the concrete wall is arranged on the outermost layer of the impermeable structure, the steel embedded parts are arranged in the concrete wall, the steel embedded parts are connected with a prestressed steel bar in concrete, the steel plate is adjacent to the concrete wall and is closely attached to the concrete wall after being welded with the steel embedded parts, and the glass fiber reinforced plastic coating is uniformly coated on the outer layer of the steel plate. The impermeable structure is simple in construction process, easy to realize, applicable to the concrete pressure container under the pressure lower than 0.4MPa, and water in the concrete pressure container can be prevented from permeating outwards via the wall.

The invention discloses a buffer device for a free forging double-arm electro-hydraulic hammer. The buffer device comprises a base; two first trapezoidal rods and a first fixing block are fixedly mounted on the top side of the base; the first fixing block is located between the two trapezoidal rods; a first groove is formed in the top side of the first fixing block; a second fixing block is fixedly mounted in the first groove; a second groove is formed in the top side of the second fixing block; a third fixing block is fixedly mounted in the second groove; the third fixing block is of a hollowstructure; a movable plate is movably mounted in the third fixing block; a connecting rod is fixedly mounted on the top side of the movable plate; and the top end of the connecting rod extends out ofthe third fixing block. The buffer device is simple in structure and is equipped with a buffer structure, so that the pressure generated during the working process of the machine can be effectively relieved, the service life of the machine can be prolonged, and the use requirements can be meet.