307results about How to "Reduce shaking" patented technology

The invention discloses an environment-friendly plastic recovery processing device comprising a bottom plate. A processing box is arranged on the upper side of the bottom plate. A crushing cavity is formed in the upper end in the processing box. A support rod is arranged at the upper end of the right side of the processing box. Racks are arranged on the upper side and the lower side of the supportrod at the upper end and are provided with connecting seats. Telescopic rods are arranged on the front sides of the connecting seats. Crushing blocks are arranged on the lower sides of the telescopicrods. The lower side of the crushing cavity is provided with a flow guide groove. A screening barrel is arranged on the lower side of the flow guide groove. A rotary disc is arranged on the lower side of the screening barrel. A separation plate is arranged on the lower side of the rotary disc. A second rotary shaft is arranged on the lower side of the rotary disc. A second motor is arranged on the right side of the lower end of the second rotary shaft. A cavity is formed in the second rotary shaft. A third motor is arranged at the lower end in the cavity. A crushing shaft is arranged on the upper side of the third motor. Crushing blades are arranged on the left side and the right side of the upper end of the crushing shaft. Discharge pipes are arranged around the lower side of the processing box. Through the environment-friendly plastic recovery processing device, the crushing, smashing and screening process of plastic waste is facilitated effectively, in this way, plastic recovery isconvenient, the environment is protected, and resources are saved.

The invention discloses an unmanned aerial vehicle transportation system for transporting hospital blood samples and a transportation method. The unmanned aerial vehicle transportation system comprises blood sample collection terminals, blood sample receiving terminals, sample boxes and unmanned aerial vehicles, wherein the blood sample collection terminals are arranged in all inpatient areas; the blood sample receiving terminals are distributed in all inspection areas; the sample boxes are used for holding blood samples; the unmanned aerial vehicles are used for transporting the sample boxes between the blood sample collection terminals and the blood sample receiving terminals; the bottoms of the unmanned aerial vehicles are provided with sample box catching devices, and sample box protection devices; the sample box protection devices comprise at least three support arms; when the unmanned aerial vehicles are in flying states, the tail ends of the support arms are bent towards one another to form a folded state in which sample box loading areas are enclosed; when the unmanned aerial vehicles are in parking states, the support arms are straightened to form straightening states by which the unmanned aerial vehicles are supported. By adopting the unmanned aerial vehicle transportation system and the transportation method, the capital construction layout of an existing hospital does not need to be changed, cost is saved, full-automatic blood sample transportation can be realized at the same time, manpower input is reduced, and security in a transportation process is ensured at the same time.

A liquid containment system for an ocean-going vessel. The liquid containment system includes a tank having converging upper walls. The converging upper walls of the tank contain a substantial portion of the liquid therebetween and reduce the free surface area associated with the liquid. The upper converging walls of the tank extend above the horizontal deck of the vessel, but still allow sufficient deck space for supporting various required equipment. In one embodiment, the liquid containment system is a prismatic membrane tank designed to receive and hold liquefied natural gas (LNG).

The invention discloses a movable vibration-proof multifunctional storage goods shelf. A shelf body comprises four supporting rods, bottoms and tops of the supporting rods on two sides of the shelf body are fixedly connected through fixing rods respectively, and supporting plates are movably connected with the fixing rods through height adjusting devices. Each height adjusting device comprises a screw rod, a slide rod, a slide sleeve, a threaded sleeve and a bearing seat, the top of each supporting plate is fixed to a connection plate through a buffer device, the top of each connection plate is symmetrically provided with slide grooves, a slider is in slide connection in each slide groove, the top of each slider is fixed to a placement plate, and each placement plate is in slide connectionwith the corresponding connection plate through the corresponding sliders and the slider grooves. Two sides of each connection plate are symmetrically and movably connected with driving devices whichare fixed to the top of the corresponding connection plate, damping devices are fixed to bottoms of the supporting rods, and universal wheels are fixed to bottoms of the damping devices. The movablevibration-proof multifunctional storage goods shelf is functionally versatile, makes full use of shelf space and has a protecting effect on articles on the shelf.

The invention relates to damping structures of machine tools, in particular to a damping device for a large machine tool. The damping device is used for connection between the large machine tool and the ground, and comprises a machine tool supporting framework and a ground supporting framework. The machine tool supporting framework is arranged in the ground supporting framework. The machine tool is arranged in the machine tool supporting framework. An interlayer is arranged between the machine tool supporting framework and the ground supporting framework in a spaced manner. A plurality of supporting seats are arranged in the interlayer, damping springs are arranged between the tops of the supporting seats and the machine tool supporting framework, and damping springs are arranged between the bottoms of the supporting seats and the ground supporting framework. The interlayer is filled with foam aluminum materials. The springs are arranged in the interlayer as the damping structure, meanwhile, the interlayer is filled with the foam aluminum materials so that transmitted vibration mechanical energy can be quickly attenuated and absorbed, the good damping effect is achieved, and the service life of the machine tool is prolonged.

The invention discloses a motorcycle storage battery convenient to be stabilized. The motorcycle storage battery comprises a base, wherein threaded holes are formed in the bottom of the base; a groove is formed in the bottom of the inner wall of the base; clamping blocks are arranged on two sides of the groove respectively; the inner wall of the groove is in contact with the bottom of the storage battery; clamping grooves matched with the clamping blocks are formed in two sides of the storage battery; a partition board is arranged inside the storage battery; the inner wall of the base is fixedly connected with a connecting rod; a first rotating shaft and a second rotating shaft are embedded in the interior of the connecting rod; and the front face of the first rotating shaft is connected with a rotating rod in a clamping manner. According to the motorcycle storage battery, through the arrangement of an extrusion stem, a telescopic support, the first rotating shaft, the second rotating shaft and an extrusion plate, in the storage process of the storage battery, the extrusion stem is extruded by the storage battery, so that the effect of stabilizing the storage battery is achieved; through the arrangement of a tension spring, an extrusion block, a pulling rope and a pulling ring, and the tension spring is at a tensioning state, so that shaking generated by bumping in the driving process can be reduced, the damage for the storage battery is reduced, and the service life is prolonged.

The invention relates to a porous hinge assembly and a construction platform. The porous hinge component comprises a first hinge and a second hinge which are mutually matched, and at least two through holes are formed in each of the first hinge and the second hinge correspondingly; the porous hinge assembly further comprises at least two connecting pieces, and the first connecting piece in the at least two connecting pieces penetrate through a group of through holes in the first hinge and the second hinge to rotatably connect the first hinge and the second hinge; and when the first connecting piece penetrates the group of through holes in the first hinge and the second hinge, at least the second connecting piece in the at least two connecting pieces penetrates through at least another group of corresponding through holes in the first hinge and the second hinge to fixedly connect the first hinge and the second hinge. The porous hinge assembly and the construction platform have the advantages that the stability and the strength are high, included angles are adjustable, and potential safety hazards caused by that constructors fold turning boards during operation are avoided.

The invention provides a tattoo device. The tattoo device comprises a shell, a needle and an elastic membrane; the needle is guided in the shell and can move between an extended position and a retracted position; the shell is provided with a needle mouth allowing the need to stretch out, and the needle mouth extends forwards to form an operation section making contact with the tattooed body; the elastic membrane is made from materials capable of elastically extending, and the front space of the front side of the elastic membrane and the back space of the back side of the elastic membrane are formed in the shell; a linkage structure is arranged on the needle and fixedly connects the needle with the elastic membrane, restoring force generated by the elastic membrane acts on the needle, and the needle is made to move backwards to return to the retracted position; the elastic membrane further generates the force making the needle tend to the operation section. Accordingly, by arranging the elastic membrane which can generate the force making the needle tend to the operation section, the needle is made to be attached to the operation section, when a person applying the needle conducts tattoo operation, the needle application position can be determined accurately according to the operation section, when the needle is close to the operation section, the operation section provides support for the operation section, and shaking of the needle during needle application is reduced.

The invention relates to a rotary-cut assembly line capable of identifying round logs with high precision. The rotary-cut assembly line breaks through the construction mode of a traditional rotary-cutassembly line, a controller controls an intermittent conveying mechanism to convey the round logs to a sorting and conveying mechanism one by one before rotary-cut in the actual working process, treeroot ends and treetop ends of the round logs are sorted by the sorting and conveying mechanism and a uniform orientation is achieved, the sorted round logs are conveyed to a rotary-cut portion one byone by a feeding portion, and detent and rotary-cut of the round logs with the uniform orientation are carried out by a positioning rotary mechanism and a rotary-cut mechanism. Root end clamping shafts supporting the tree root ends of the round logs are designed as a structure of being high in strength and high in deformation resistance and abrasion resistance to support the tree root ends and the treetop ends of the round logs in a targeted mode, the shaking amplitude of heavier tree root ends of the round logs is reduced, the size, materials and the like of machine parts can be controlled on the basis of improving the rotary-cut precision, and ensuring that the thickness of wood chips is uniform and the quality of the wood chips is stabilized, and the cost is lowered as much as possible.

The invention discloses an improved electroconductive glass fiber reinforced plastic electric demister. One side in the lower shell, corresponding to an air inlet flange, is provided with a forced air flow guiding and distributing plate, a middle shell below a lower cathode bearing framework is internally provided with a forced air distributing plate, an adjustable air distributing plate and an air rectifying and distributing plate from bottom to top in sequence, an upper shell is internally provided with an adjustable air distributing plate and a forced air distributing plate from bottom to top, the forced air distributing plates in the upper shell and the middle shell are both arranged in a prism frustum body of each of the upper shell and the lower shell, and by means of arranging the forced air guiding and distributing plate in the lower shell, arranging three layers of air flow distributing plates, namely the forced air distributing plate, the adjustable air distributing plate and the air rectifying and distributing plate, in the middle shell, and arranging the adjustable air distributing plate and the forced air distributing plate in the upper shell, air flows passing in and out of an electric field are made uniform, so that the shakes of a cathode system are reduced and the demist efficiency of the electric demister is increased.

A lens driving device is provided, including a frame, a lens holder, a spring sheet, and at least one damping element. The lens holder is movably disposed in the frame. The spring sheet has an outer periphery portion combined with the frame, an inner periphery portion combined with the lens holder, and an arm portion connected between the outer periphery portion and the inner periphery portion. The damping element is connected between the arm portion of the spring sheet and at least one of the frame and the lens holder.

Provided is a multi-directional input device capable of restraining output deviation of a detecting unit by reducing swinging of an operating component. In the multi-directional input device (10), the operating component (3) is provided with an accommodating portion (311) of an accommodating spiral spring (91), a cylindrical portion (312) downwardly formed in a protruding mode of the accommodating portion (311), a hole portion (321) formed from the lower end of the cylindrical portion (312) to the upper end portion of a protruding portion (32). A driving component (92) is provided with an inserted hole portion (321), a shaft portion (922) externally protruding to an opening (221a) of a shell. Guiding operation is carried out between a position to which the shaft portion (922) moves, corresponding to the upper end portion of the shaft portion (922), of the hole portion (321) along an axial direction and the lower end portion of the cylindrical portion (312).

The invention discloses a scraper evaporator, and relates to a concentrating and solvent recovering apparatus. The apparatus comprises a hollow tank, the top of the tank is provided with a motor, a rotating shaft is vertically arranged in the tank, the output end of the motor is connected with the rotating shaft, one end of the rotating shaft far from the motor is provided with a scraper plate, a jacket is arranged outside the tank, a plurality of reinforcing ribs are arranged on the surface of the inner sidewall of the tank, the rotating shaft between the motor and the scraper plate is provided with a plurality of stirring blades, and the stirring blades are vertically arranged in a parallel interval manner; and the lower end of the tank is provided with a fixing seat. The apparatus has the advantages of good concentration effect, unlikely shaking of the rotating shaft driving the scraper plate to rotate, use safety, convenience and practicality.

The invention discloses an ocean monitoring buoy. The ocean monitoring buoy comprises a buoy body, an electric control box, a bracket, a fixing module, a power supply module, an indication positioningmodule, a sensor module and a communication control module. The electric control box is arranged in the center of the top end of the buoy body. The power supply module is composed of solar cell panels and a storage battery. The storage battery is located in the electric control box. The indication positioning module comprises a signal lamp and a GPS positioning module. The signal lamp is fixed toa mounting plate at the top end of the bracket. An instrument bin and a counterweight block are sequentially arranged at the bottom of the buoy body from top to bottom. A temperature sensor and a water quality monitoring sensor are arranged in the instrument bin. The ocean monitoring buoy is in a gyroscope shape, and the buoy can keep relatively good stability on the ocean plane; a stainless steel framework is arranged in the buoy and high in strength, the buoy is coated with fluorocarbon finish paint, and the buoy can be prevented from being corroded by seawater; and the ocean monitoring buoy is provided with an instrument shelter, a water quality monitoring sensor and the like, so that the ocean can be monitored in an omnibearing manner.

The invention discloses an overflow-preventing water tank which comprises a water tank and a water inlet pipeline fixedly arranged on the side wall of the water tank and used for supplying water to the water tank. The overflow-preventing water tank also comprises a plurality of liquid level sensors which are fixedly arranged on the inner side wall of the water tank; a valve assembly is fixedly arranged on the water inlet pipeline; a buffer pipeline is also arranged in the water tank; and the buffer pipeline is fixedly connected to the tail end of the water inlet pipeline. The overflow-preventing water tank disclosed by the invention can reduce the impact force of a water flow to the water tank during water inflow, so that the swing of the tank body is alleviated; when the water in the water tank reaches a target water level, a water inlet valve is closed immediately by designing the multiple water level sensors. Industrial halt down caused by overflowing problem is also avoided when some sensors are damaged. As a water level floating ball valve is arranged, the water inlet valve will be closed automatically under the action of a floating ball in case of trip or failure.

The invention discloses a rotating lifting appliance for a crane. The rotating lifting appliance comprises a trolley body, a lifting drive motor, a reduction gearbox, two groups of duplex winding drums, four groups of lifting components, a lifting hanging beam and a rotating hanging beam, wherein each of the two groups of duplex winding drums is connected with the corresponding two groups of lifting components; each group of lifting component comprises a first fixed pulley, a second fixed pulley and a movable pulley; the four groups of lifting components form a statically indeterminate structure, so that shake produced by the lifting appliance during the using process can be reduced; a slewing bearing is arranged between the lifting hanging beam and the rotating hanging beam; the lifting hanging beam is fixedly connected with an inner ring of the slewing bearing; the rotating hanging beam is fixedly connected with an outer gear ring of the slewing bearing; a rotating component is fixedly connected onto the lifting hanging beam and is used for driving the outer gear ring of the slewing bearing, so as to reduce the manpower burden and improve the use safety of the lifting appliance. A lifting hook is rotatably connected to the middle position of the lower surface of the rotating hanging beam, a plurality of magnetic lifting appliances are symmetrically distributed on the rotating hanging beam on the two sides of the lifting hook, so that sufficient reliability is provided for the lifting work of bar materials.

A method of capturing a still frame is disclosed. The method generally includes the steps of (A) generating a plurality of initial frames with a sensor in response to an optical signal and (B) generating the still frame by combining the initial frames using a noise reduction technique.

The invention relates to a descending wet electrostatic precipitation, demisting and ultra-low flue gas emission device. The device comprises an upper air chamber, a lower air chamber and an electrostatic precipitation device located between the upper air chamber and the lower air chamber; a V-shaped air flow distributor is arranged at the air inlet end inside the upper air chamber; multiple layers of flue gas uniform distribution devices are arranged below the V-shaped air flow distributor; flue gas flow stabilizing devices are arranged below the flue gas uniform distribution devices of the upper air chamber and at the upper part of the lower air chamber; a flushing device is arranged below the flue gas flow stabilizing device inside the upper air chamber; the lower end of the lower air chamber is connected with a flue; a cylinder is arranged outside the lower air chamber; the lower end of the cylinder is connected with a dirt collecting bucket; radial plates are arranged in circular spaces of the flue and the cylinder; and the electrostatic precipitation device is connected with an electrical insulation box and a heating system. The device is simple in structure, the air flow distribution flow resistance is low, flue gas rotates, diffuses and is uniformly distributed in gaps formed by a spherical body group along the surfaces of spherical bodies, the flue gas uniform distribution performance is excellent, the device is convenient to change and clean, the gaps of the spherical bodies are adjustable on a series connection rod, and the precipitation efficiency can be improved.

The invention discloses a pesticide mixing device convenient to clean. The pesticide mixing device comprises a box body, wherein a feeding opening is formed in the left side of the top of the box body; a sliding chute is formed in the top of the box and in the right side of the feeding opening; a sliding block is glidingly connected with the interior of the sliding chute; a cover plate is fixedlyconnected with the top of the sliding block; a push block is fixedly connected with the right side of the top of the cover plate; a push handle is fixedly connected with the right side of the top of the box body; a first baffle is fixedly connected with the inner side of the box body. The pesticide mixing device can scrape residual pesticide in a mixing box through the arrangement of the feeding opening, the first baffle, a material outlet pipe, a water tank, a second baffle, a water pump, a motor, a driving wheel, a driven wheel, a rotating shaft, a stirring blade, a connecting rod and a scraping plate, solves the problem that residual pesticide inside a traditional pesticide mixing device is inconvenient to clean, has the advantages that the device is convenient to clean, and is worthy of promotion.

The invention relates to a damping and buffering mechanism. The damping and buffering mechanism comprises a damping and buffering device, wherein the damping and buffering device comprises a sliding bracket assembly, a swing bolt, a damper, a spring and a pull rod, the damper comprises a piston, a piston rod and a cylinder body, the piston is arranged in the cylinder body, one end of the piston rod is arranged in the cylinder body and is in matching connection with the piston, the other end of the piston rod extends from the cylinder body and is fixedly arranged on the sliding bracket assembly, the cylinder body is arranged on the sliding bracket assembly in a sliding mode, one end of the spring elastically acts on the cylinder body, and the other end of the spring elastically acts on the sliding bracket assembly and is mutually linked with the cylinder body; one end of the pull rod is in mutual positioning and running fit with the swing bolt, and the other end of the pull rod is in matching connection with the cylinder body; the swing bolt is arranged on the sliding bracket assembly in a sliding mode and is used for driving the cylinder body to slide on the sliding bracket assembly at the same time by virtue of the pull rod during sliding, the spring follows to move when the cylinder body slides, and elastic force is generated. By adopting an improved structure, the damping and buffering mechanism has the advantage of strong practicability.

The invention relates to a stable and reliable clean type electric drill. The stable and reliable clean type electric drill comprises a main body, a drill bit, a stabilizing mechanism and a collectingmechanism; the stabilizing mechanism comprises a stabilizing assembly and two clamping assemblies; the stabilizing assembly comprises a first motor, a gear and two stabilizing units; each stabilizingunit comprises a rack, a limiting groove, a first connection rod, a cross rod, a second connection rod and a connection block; the collecting mechanism comprises a collection tank and a telescopic assembly; the telescopic assembly comprises a drive unit, a positioning rod, a slide block, a fixed block, a telescopic frame, a connection board, two positioning blocks and two transmission blocks; anda PLC and a wireless signal receiving and dispatching module are arranged inside the main body. According to the stable and reliable clean type electric drill, stability of the main body is improvedthrough the stabilizing mechanism, shake of the electric drill during drilling is reduced, stability and practicability of the electric drill are higher, metal scraps are collected into the collectiontank through the collecting mechanism and are prevented from being scattered on the ground and hurting people, and accordingly safety and cleaning degree of the electric drill are improved.

The invention discloses a constructional column pouring device for buildings, and relates to the technical field of building construction tools. The constructional column pouring device for buildingscomprises a cart body, a pushing handle, a stabilizing mechanism, a supporting rod, a feeding hopper, a screen, a first gear motor, a vibration rod, a material transport pipe, a feed mechanism, a control box and an expansion mechanism. The bottom end of the pushing handle is fixedly connected with the top surface of the left end of the vehicle body; the top end of the stabilizing mechanism is fixedly installed at the center of the top surface of the vehicle body; and the bottom end of the supporting rod is fixedly connected with the top surface of the right end of the vehicle body. The constructional column pouring device for buildings can quickly position the vehicle body; in this way, the stability of the whole pouring device can be fully improved; the pouring device is simple in structure and convenient to use, concrete can be rapidly fed, the material conveying speed of the pouring device can be increased, the height of a material conveying pipeline can be rapidly adjusted finally,the labor intensity of workers can be reduced, and therefore the working efficiency of the pouring device is further improved.

The invention relates to high-precision human face recognition equipment with a multi-angle shooting function. The high-precision human face recognition equipment comprises a main body, a light hood,a recognizing mechanism, a correction mechanism and a central control mechanism, wherein the correction mechanism comprises a supporting block and two correction assemblies; each of the correction assemblies comprises a driving unit, a connecting unit, a second transmission plate, a moving plate, two transmission rods, two first transmission plates, two limiting rods and two torsional springs; andthe recognition mechanism comprises a first driving assembly, a second driving assembly, a transmission assembly, a lifting base, a camera, a rack, a moving block, two first gears and two lead screws. The high-precision human face recognition equipment with the multi-angle shooting function can fix the position of a human face through the correction mechanisms, so that the precision of the humanface recognition equipment is improved; human face information is collected from different angles by means of the recognizing mechanism, so that the precision of the human face recognition equipment is further improved, and the practicality of the human face recognition equipment is improved.

The invention provides a headlamp dimming support structure. The headlamp dimming support structure comprises a manual dimming assembly, the manual dimming assembly comprises a manual dimming guide rail, a universal base, a guide rail sleeve, a metal clamping piece and a manual dimming screw, the guide rail sleeve and the manual dimming guide rail are in sliding connection, the guide rail sleeve is connected with the universal base, the guide rail sleeve is in threaded with the manual dimming screw, and the metal clamping piece is connected with the guide rail sleeve and the manual dimming screw. The structure has the beneficial effects that shaking generated by the gap between the manual dimming screw and the guide rail sleeve can be reduced, and the scratching defect is avoided.

The invention discloses an implementation method for increasing ink stirring efficiency of a printing plant. The method comprises the following steps: pouring ink to be stirred into a stirring barrel;placing the stirring barrel on a damping element, and fixing the stirring barrel by using a pressing plate; adjusting positions of stirring vanes according to volume of the ink poured into the stirring barrel; unscrewing a spacing ring, and adjusting the height of a transverse plate so as to enable an output shaft to extend into the stirring barrel and enable all the stirring vanes to be locatedin the ink; turning on a driving mechanism, and enabling the driving mechanism to drive the output shaft to rotate, so as to force the stirring vanes to stir the ink; carrying out stirring for 5 to 8minutes, turning off the driving mechanism, and adjusting an angle of tilt of a supporting rod; and turning on the driving mechanism again to continue to stir the ink.

The invention discloses an ascending and descending hanging basket for building outer wall decoration. The ascending and descending hanging basket for building outer wall decoration comprises a building body, wherein an installing plate is arranged at the top end of the building body; a carrying plate is arranged at the top end of the installing plate; the installing plate and the carrying plate are connected through a sliding mechanism; a driving device and a first fixing plate are arranged at the top end of the carrying plate; one end of the first fixing plate extends out of the carrying plate; a U-shaped plate is arranged at the end, extending out of the carrying plate, of the first fixing plate; a fixed pulley is arranged at one side of the U-shaped plate; the U-shaped plate is connected with the fixed pulley through a rotating shaft; a hanging basket is arranged under the fixed pulley; a controller is arranged in the hanging basket, and is electrically connected with the driving device; and a steel rope is arranged on the fixed pulley. The ascending and descending hanging basket for building outer wall decoration provided by the invention has the advantages that the hanging basket can be transversely moved, and the problem that a traditional hanging basket cannot be transversely moved is solved; meanwhile, the stability of the hanging basket during construction operation is guaranteed; the safety of the construction operation is improved; and the efficiency of the construction operation is improved.

The invention relates to an equipotential live working method for entering electric field of a high-voltage transmission line. An equal potential electrician takes an electric field entering-and-outing vehicle for entering the electric field along tension insulator strings. The electric field entering-and-outing vehicle can advance or retreat on two tension insulator strings. According to the method, the equal potential electrician enters the electric field in a sitting gesture, thereby reducing physical power consumption of operation personnel. Compared with an electric field entering method in which the left foot and the right foot are respectively placed on a first insulator and a third insulator and the left hand and the right hand are placed on two insulators on the other insulator string, the method of the invention has an advantage of making the operator more comfortable and more convenient, so that the operator has enough physical power for finishing the subsequent live operation. The electric field entering-and-outing vehicle of the invention has advantages of simple integral structure, small material weight, low studying cost of the operator, and easy operation. Furthermore high operation efficiency and high operation safety can be ensured.

The invention discloses a double-fixation scale-blockage-preventing long-plunger sand-preventing oil well pump. The double-fixation scale-blockage-preventing long-plunger sand-preventing oil well pump comprises an outer pipe, and pump cylinders arranged in the outer pipe at intervals, wherein the upper end of the outer pipe is connected with an extension nipple through an oil pipe righting coupling; the inner surface of the oil pipe righting coupling is provided with multiple inner righting blocks, and is in environment-friendly contact with the outer surfaces of the pump cylinders; the upper ends of the pump cylinders are connected with righting bodies through threads, and the lower end surfaces of the pump cylinders are pressed against the upper end surfaces of the inner righting blocks of the oil pipe righting coupling; the lower ends of the pump cylinders are connected with pump cylinder lengthening pipes through pump cylinder couplings; righting blocks of the righting bodies are respectively in support contact with the inner wall of the extension nipple in all directions; external threads are arranged at the lower ends of pump cylinder lengthened pipes, and the lower ends of the pump cylinder lengthened pipes are in threaded fit and connection with lower joints; external threads are arranged on the outer surfaces of the upper ends of the lower joints and the lower end of the outer pipe; and the lower joints and the outer pipe are in fit and connection through lower couplings. The double-fixation scale-blockage-preventing long-plunger sand-preventing oil well pump is simple in structure, convenient for use, effectively reduced in shaking in an oil well, improved in pumping efficiency, and prolonged in service life.

The invention relates to a combinable medical tray. The combinable medical tray comprises a first tray rack, first connecting plates and a second tray rack, wherein a sliding slot is formed in the inner side of the tray rack; the inner side of the sliding slot is connected with a first protecting plate; the first connecting plates are embedded in two ends of the first tray rack; a limiting throughhole is fixed in the outer wall of each first connecting plate; a first accommodating groove is formed in the right side of the inside of the first tray rack; a fixed rod is fixed on the outer side of the first accommodating groove; a connecting shaft is embedded in the right end of the first tray rack; a division board is mounted on the right side of the first tray rack; an air through hole is formed in the outer wall of the division board; and the second tray rack is mounted on the right side of the connecting shaft. The combinable medical tray has the beneficial effects that the first connecting plates and second connecting plates are embedded in the outer wall of the first tray rack and the outer wall of the second tray rack, the outer side of the tray can be fixed preliminarily, andshaking generated during use of the tray is relieved.

The invention discloses a special hoisting device capable of preventing shaking. The special hoisting device comprises hoisting equipment (1), a steel wire rope (4) arranged on the hoisting equipment (1), a fixed part fixedly mounted on the hoisting equipment (1) and a clamping part (3) mounted on the fixed part. The special hoisting device is characterized in that the fixed part comprises an upper bottom plate (21) with the upper end face fixedly connected with the hoisting equipment (1), rigid telescopic parts and a lower bottom plate (23) with the upper end face fixedly connected with the rigid telescopic parts, wherein one end of each rigid telescopic part is fixedly connected with the lower end face of the upper bottom plate (21); a through hole (211) used for allowing the steel wire rope (4) to penetrate is formed in the position, corresponding to the steel wire rope (4), of the upper bottom plate (21); and a hook (231) is arranged at the position, corresponding to the steel wire rope (4), of the upper end face of the lower bottom plate (23). By means of the structure, according to the special hoisting device, a hoisted object cannot shake in the hoisting process; and compared with existing equipment, the special hoisting device further guarantees the safety of the hoisted object.