144results about How to "Simple shape and structure" patented technology

The invention discloses a door body of a refrigeration plant and a refrigerator with the door body. The door body comprises a frame, a door liner and a glass panel, wherein the frame comprises a left vertical post, a right vertical post, an upper end cover and a lower end cover, the upper end cover is connected with the upper ends of the left vertical post and the right vertical post, and the lower end cover is connected with the lower ends of the left vertical post and the right vertical post; the door liner is used for closing the back surface of the frame; and the glass panel is arranged on the front surface of the frame so as to close the front surface of the frame, and an insulation material space is defined by the glass panel, the frame and the door liner; and the back surface of the glass panel is provided with a left connecting piece and a right connecting piece which stretch in an up-and-down direction, the left connecting piece is adjacent to the left side edge of the glass panel and is connected with the left vertical post, and the right connecting piece is adjacent to the right side edge of the glass panel and is connected with the right vertical post. According to theinvention, the door body of the refrigeration plant is simple and beautiful in appearance and structure and easy to assemble.

The invention relates to a control method and a system of a helicopter rotor, which belongs to the technical field of helicopter operation. The control method is characterized in that the distance changing of a blade is realized by adopting an actuator positioned on the stinger of each propeller boss to drive a flap positioned at the rear edge of the blade, so as to realize the control of a rotorsystem. The system comprises a demountable flap (1) installed at rear edge of the blade, torque soft propeller bosses (14), an actuator (13) installed on the stinger of torque soft propeller bosses, a flap control mechanism (1) with one end being connected with actuator (13) and the other end thereof being connected with the flap (1), and a test control system (59). The control method and the system have the advantages that the screw piston of each blade can be independently controlled, the structure is simple, the weight is light, the controllability is good, and the reliability and the security are high.

The invention relates to a monitoring device for measuring surface displacement and internal deformation of slope rock and surrounding rock, in particular to a rod type multi-point displacement measuring device adopting a coaxial structure. The measuring device adopts the structure that the displacement transfer pipes with diameters gradually increased are sequentially and coaxially sleeved from inside to outside, an anchor head of the innermost displacement transfer pipe is a solid anchor head, and the anchor heads of other displacement transfer pipes are hollow anchor heads with through holes; the hollow anchor heads are connected with the adjacent displacement transfer steel pipes on the inner side, which penetrate the through holes; each externally sleeved plastic pipe is cut off and is subjected to diameter changing at the through anchor head on the outer side of the plastic pipe so as to allow the anchoring segment to be exposed out; and the distances between the anchor heads and an installation base are sequentially diminished according to the sequence of the displacement transfer pipes where the anchor heads are positioned from inside to outside. The measuring device provided by the invention is most suitable for the fields with higher requirement in measuring accuracy, and can also be used for other engineering occasions with requirements similar to displacement or deformation monitoring.

The invention discloses a heating and thermal insulation riser sleeve, and belongs to the technical field of alloy casting. The heating and thermal insulation riser sleeve comprises a thermal insulation layer and a heating layer, wherein the heating layer is fit with the inner wall of the thermal insulation layer and consists of a plurality of heating bags, and each heating bag comprises a heating agent layer and a coating layer. According to the technical scheme, a heating agent of the heating layer is used for processing, long block-shaped heating bags are manufactured, and heating bags with different models and amount are selected to be adhered to the inner wall of the thermal insulation layer according to requirements so as to form a complete heating layer, and thus riser sleeves with different models can be used and are convenient to use.

The invention discloses multi-functional material conveying, distributing and hoisting equipment which comprises a tower body, a balance arm and a hoisting arm, wherein the tower body is provided with a rotational platform; the balance arm is fixed on one side of the top part of the tower body; the hoisting arm is fixed on the other side of the top part of the tower body; a feeding funnel is arranged on the top part of the tower body; the feeding funnel is connected with the balance arm through a balance arm pull rod; a casting machine is arranged in the hoisting arm and the balance arm; the casting machine can supply materials to two directions of the hoisting arm and the balance arm; the hoisting arm is in a telescopic arm mode; and a hoisting trolley is arranged at the front end part of the hoisting arm. According to the equipment, the material conveying, distribution and hoisting functions are effectively combined, so that not only is the high efficiency in material conveying and distribution of the casting machine brought into play, but also the basic hoisting function of a tower carne is maintained; and moreover, the equipment has the characteristics of simple and small appearance and strong generality.

The invention discloses a movable and adjustable multi-functional hoisting frame which comprises two groups of devices. Each of the two groups of devices comprises a base, a lower vertical post and an upper vertical post, wherein a universal wheel is arranged on the bottom face of the base, a flange disc is arranged at the bottom of the lower vertical post and can be fixedly connected with the base, height adjusting holes are respectively formed on the lower vertical post and the upper vertical post, the upper vertical post and the lower vertical post are connected through a steel pin which is inserted into the height adjusting holes, a connecting flange is arranged at the top of the upper vertical post, a cross beam is connected with the connecting flange through a width adjusting hole formed on the cross beam, a hanging ring is further arranged on the cross beam and is used for installing a hanging calabash, and the cross beams of the two groups of devices are butted to form the multi-functional hoisting frame.

The invention relates to a high-reliability S-shaped quick metal connecting buckle which is used for connecting two assembling members together. The metal connecting buckle is an S-shaped elastic metal member which comprises an upper side plate, a middle plate and a lower side plate which are connected sequentially, an upper side clamping groove used for clamping the assembling member on the upper side is formed between the upper side plate and the middle plate, a lower side clamping groove used for clamping the assembling member on the lower side is formed between the lower side plate and the middle plate, the middle plate is a horizontal plate, a V-shaped protrusion facing the middle plate is arranged on the upper side plate, the V-shaped protrusion and the middle plate are used for applying pressure on the assembling member on the upper side, a barb facing the middle plate is arranged on the lower side plate, and the barb and the middle plate are used for applying pressure on the assembling member on the lower side. Compared with the prior art, the high-reliability S-shaped quick metal connecting buckle has the advantages of simple structure, low manufacturing cost and short development period, reliability and quality of assembling are guaranteed, cost is saved, and benefit is increased.

The invention relates to a beam shaping device. The beam shaping device comprises beam shaping units which are distributed in an array mode, wherein each beam shaping unit comprises a plurality of phase sub units; and each beam shaping unit can independently realize beam shaping. The beam shaping device is used for acquiring device phase distribution data by a phase inversion algorithm according to the requirements of beam far fields on light intensity distribution, and an acquired phase distribution form is formed on the device by an etching method or an impressing method, so that the beam shaping device which can realize any shapes or meets the different requirements on the light intensity distribution, particularly, the beam shaping device capable of acquiring uniform light intensity distribution can be constructed. The beam shaping device can be used for transformation and shaping of light source outgoing beams of hot light sources, solid lasers, excimer lasers, semiconductor lasers and the like.

The invention discloses a missile and barrel separation device of a high-submergence-depth underwater unpowered launching carrying system. The missile and barrel separation device comprises a launching barrel provided with a front cover, a sealing bottom plate arranged in the launching barrel and a catapult. The catapult is fixed to one side of the sealing bottom plate, and the other side of the sealing bottom plate is attached to the tail end of a guided missile. The sealing bottom plate can slide along the launching barrel. The launching barrel is further provided with a cover opening mechanism for opening the front cover. Pushing force generated by the catapult pushes the sealing bottom plate to further push the tail end of the guided missile so that the guided missile can slide towards the front cover along the launching barrel, and the guided missile slides to be separated out of the launching barrel. According to the missile and barrel separation device, the guided missile is placed in the launching barrel in an airtight manner; after the launching barrel comes out of water and reaches a set height and posture, a carrier sends out an instruction, the catapult works, the pushing force of the catapult acts on the sealing bottom plate to enable the guided missile to be popped out of the launching barrel, missile and barrel separation is achieved, and the sealing plate can be left in the launching barrel; the short-time watertight function of the launching barrel is achieved, and the launching barrel can float on the water surface; and launching barrel recycling is achieved, and cost is reduced.

The invention provides a simple flexible positioning method for a continuous external surface of a workpiece, which comprises the following steps: external surface elements-positioning points or lines are selected on the continuous positioning external surface of the workpiece, and the shape of the workpiece is determined and positioned discontinuously by the multiple points or multiple lines; positioning pins which are in point contact or line contact with the external surface of the workpiece are installed on the selected positioning points or lines, and shape positioning pins (7) are distributed along the shape of the workpiece; the positioning pins are positioned by tangent points or tangent lines which are in contact with the shape of the workpiece; the shape positioning pins (7) areinstalled in a step bushing (6); the shape positioning pins (7) are assembled at one end of the step bushing (6), and a target ball (8) of a laser tracking instrument is arranged at the other end of the step bushing (6); laser beams are received by the target ball (8); and the laser tracking instrument emits and receives the laser beams fedback by the target ball (8) and judges the space positionof the positioning points by a computer. The method for flexibly positioning the shape of the workpiece provided by the invention has high manufacturing accuracy, small technology difficulty, high work efficiency and short manufacturing cycle.

The invention discloses an oil mist separator which comprises a centrifugal separation section, a spiral separation blade, a filter cylinder, a blower, a pipeline, an electric cabinet and a filter element. The oil mist separator is characterized by adopting a three-section structure including a first grade, a second grade and a third grade, wherein the first grade is used for preliminary separation of large oil mist particles according to a high speed revolution centrifuging method; the second grade is used for separating and collecting small oil mist particles according to a movement impact separation process; the third grade is used for collecting and separating residual oil blobs according to the multilayer, multi-material, composite, pore-changeable and repeated-conversion structure of an efficient coalescence-separation filter; and the efficient coalescence-separation filter adopts a three-layer structure including a filtering layer, a coalescence layer and a separating layer. According to the invention, the oil mist separator has the advantages that the outline shape is simple; various types of oil mist of different viscosities can be treated efficiently and highly accurately; and the service life is longer.

The invention discloses a supercharger engine hot end heat insulating shield assembly which comprises an exhaust manifold heat insulating shield, a supercharger heat insulating shield and a three-way catalyst heat insulating shield. Both the supercharger heat insulating shield and the three-way catalyst heat insulating shield are in a layered structure, upper layers and lower layers of the two are hot-dipping aluminum plates, and middle layers of the two are ceramic fiber paper plates. The three-way catalyst heat insulating shield is formed by an upper three-way catalyst shield and a lower three-way catalyst shield, wherein the upper portion of the upper three-way catalyst shield is mounted on the left side of a supercharger, the lower portion of the lower three-way catalyst shield is mounted on the left side of a three-way catalyst, and the lower three-way catalyst shield is mounted on the right side of the three-way catalyst. The supercharger heat insulating shield is arranged above the three-way catalyst heat insulating shield, mounted on the right side of the supercharger and connected with the upper portion of the three-way catalyst shield via two mounting points. By the supercharger engine hot end heat insulating shield assembly, the supercharger and the three-way catalyst are integrally subjected to heat insulation, noise reduction and protection, strength can be guaranteed and modal requirements can be met, processing and manufacturing are enabled to be easy, and the mounting is enabled to be convenient.

The invention relates to a fishing alarm, in particular to an automatic wire-loosing fishing alarm with adjustable sensitivity and a wire-returning alarming function. The fishing alarm is composed of an outer shell, a sound production element installed in the outer shell, an adjustment element, a circuit board assembly and a battery which are installed in the outer shell and a shaft which is installed in an opening hole of the wall of the outer shell and rotates along with traction of a fish wire. A spring is connected to the rotary shaft. The functions that the wire is automatically loosed, the sensitivity is adjustable, an alarm is given when the wire returning is performed and the sound volume of the alarm is adjustable are achieved. The automatic wire-loosing fishing alarm with the adjustable sensitivity and the wire-returning function has the advantages of being convenient to use, cheap and not only capable of being used for sea fishing, but also capable of being used for freshwater fishing.

The invention discloses an elevator traction machine which comprises an electromotor, a fixing machine base, a fixed mainshaft, a rotor case, a rope sheave, a bearing and a supporting machine base, wherein the rope sheave is used for driving an elevator rope; a stator mounting part is arranged at a cylinder part, axially extending, of the fixing machine base, and a rotor mounting part is arranged at a cylinder part, axially extending, of the rotor case; the rotor mounting part and the stator mounting part are opposite to each other; the rope sheave is fixedly connected with the rotor case, and the fixed mainshaft is used for supporting the rotation of the rotor case through the bearing; the supporting machine base and the fixing machine base are used for supporting the fixed mainshaft together, and an encoder is arranged between the rotor case and the supporting machine base. The elevator traction machine with the cylinder type electromotor is in a new double-supporting structure for the shaft, the structure and the bearing way of the traction machine are beneficial to improving the loading capacity of the traction machine, and the whole structure of the traction machine is simpler.

The invention relates to an elastic overflow weir. The bottom edge of a weir plate is hinged on a fixed base, a sealing rubber sheet is arranged at the hinged part of the weir plate and the fixed base, the upper surface of the weir plate is of an arc surface, the sensitivity is high, the overflow resistance is low, the overflow rate is fast, and the overflow amount is larger, the closure effect is stable, and the water discharge of large quantity is realized; the back surface of the weir plate is linked with at least a cluster spring fixed on the fixed base, thus, the overflow weir is enabled to have simple outline structure, the parts are reduced, the assembly and the maintenance are convenient, the overflow weir is not limited by the landform, the rise and the fall of the weir plate are stable, and the overflow weir of 1 meter width can be used for replacing a fixed weir of 8 to 15 meter width.

The invention relates to the technical field of intelligent electronic equipment, in particular to AR glasses. The AR glasses comprise a display module; an adjusting mechanism; a spectacle frame, wherein the display module and the adjusting mechanism are arranged on the spectacle frame; the adjusting mechanism is arranged to be capable of adjusting the image of the display module to be within a set visual field range. The AR glasses provided by the invention can meet the imaging effect of people with different head circumferences and pupil distances when the people wear the AR glasses.

The invention relates to a profile material reinforcement connecting structure part used for fastening connection of profile materials with at least two parallel vertical surfaces. The profile material reinforcement connecting structure part comprises a barrel. First teeth arranged in the peripheral direction of the outer surface of the barrel are arranged at one end of the barrel. Interlocking keys arranged in the peripheral direction are arranged at the other end of the barrel. The first teeth and the interlocking keys are fixedly connected with the two parallel vertical surfaces of the profile materials correspondingly. At least one of the two ends of the barrel is fixedly connected with a matched fitting through a connector. According to the profile material reinforcement connecting structure part, the first teeth are in interference fit connection with one vertical surface of the profile materials, the interlocking keys achieve self-fastening with the other vertical surface of the profile materials through flowing of materials, fastening connection of the profile materials is realized through the structure part, and no special requirements exist for the wall thickness, width and tolerance of the profile materials. Installation is convenient, welding and re-tapping are not needed, and the cost and energy consumption are lowered. The two vertical surfaces of the profile materials are connected at the same time, the connecting reliability is increased, the barrel can serve as a reinforcement bar, and therefore the rigidity of the profile materials is increased.

The invention discloses a corrosion resistant technique of magnesium alloy combining aluminum cladding and plastic deformation, comprising the steps of: cladding a layer of aluminum or aluminum alloy on the surface of the magnesium alloy, then performing plastic deformation at a relatively high temperature under appropriate conditions to form favorable physical weld between the aluminum cladding and the aluminum alloy base on the basis of mechanical bond to produce a very thin intermetallic compound diffusion layer, which has superior corrosion resistance to significantly reduce the corrosion rate of the magnesium alloy. Meanwhile, the surface of the magnesium alloy base is clad with aluminum or aluminum alloy that has very high passivation so as to avoid partial corrosion of battery resulting from all kinds of defects and achieve the purpose of improving the corrosion resistance of the magnesium alloy base. Additionally, plastic deformation can refine the grains of the magnesium alloy base and the aluminum cladding, so as to improve the mechanical property of the both and further improve the corrosion resistance of the magnesium alloy base and the aluminum cladding.

The present invention is relating to the improvement of swimming mask, especially to a swimming mask having two bands in both sides of mask body formed integrally. Furthermore, the band adjustment is in the rear portion of head. By the way, the structure of swimming mask can be simplified and the facial pressure can be more even.

A phase change heat pipe includes a metal shell. The metal shell is provided with a heat pipe cavity and a phase change material cavity that are isolated from each other. The inside of the heat pipe cavity is circular, and a capillary is provided on the circular inner wall. Structure, the space of the capillary structure is filled with liquid working fluid, and other spaces in the heat pipe cavity are filled with gaseous working fluid; the phase change material cavity is filled with phase change material, and one end of the metal shell is filled with the heat pipe working fluid. and phase change material, and the other end is closed after filling the heat pipe working medium and phase change material. The integrated phase change heat pipe can not only achieve high-efficiency heat transmission, but also has a large heat capacity, effectively suppress temperature fluctuations, and can absorb more heat in a short period of time, producing an obvious heat storage effect.

The invention discloses a method for manufacturing a pipe clamp. The pipe clamp comprises semi-pipe clamp pairs for connecting a pipeline. The method comprises the following steps: forming a blank by extruding continuously, wherein the blank is a semicircular cylinder provided with flanges on both sides; cutting the blank to form a plurality of semi-finished products which are equally divided along the longitudinal direction of the blank; machining the semi-finished products to form a plurality of semi-pipe clamp pairs, wherein two semi-pipe clamps in each semi-pipe clamp pair are of the same shape and size; and combining the semi-pipe clamps into the pipe clamp. Moreover, the invention further discloses a pipe clamp and a pipeline comprising the pipe clamp. The pipe clamp is manufactured according to the pipe clamp manufacturing method disclosed by the invention by extruding and machining, so that a pipe clamp of a simple outline shape can be manufactured; and defects of the produced pipe clamp can be reduced through an extruding process, so that the performance of the produced pipe clamp is improved.

The invention provides a feeder insulator and an on-plane short-wave radio station wire antenna using same. The wire antenna comprises a first steel wire and a second steel wire. The top ends of the two steel wires are connected through screwing, and furthermore the two steel wires are mounted on a vertical tail of a plane through a connector. The connector comprises an insulator, a vibration damper and an ear ring. The lower end of the first steel wire is fixed on a skin at the front end of the plane through a through insulator. Furthermore the lower end of the second steel wire is connected with a short-wave radio station antenna RF feeder wire at the back end of the plane through the feeder insulator. The feeder insulator comprises a metal column core, an insulating cover, an insulating pad and a shielding housing. The feeder insulator provided by the invention can prevent electromagnetic radiation of a short-wave radio-station antenna signal in the plane body and prevents electromagnetic interference to operation of other electronic equipment in the plane. The double-steel-wire structure of the on-plane short-wave radio station wire antenna has advantages of sufficiently utilizing a limited short-wave antenna mounting space at top of the plane body, simplifying shape structure of the wire antenna, reducing number of outer projections of the antenna, and reducing aerodynamic resistance of the antenna in flight process of the plane.

The invention discloses a connecting structure for pipes with the equal diameter and belongs to the technical field of pipeline connection. The connecting structure for the pipes with the equal diameter comprises a pipe fitting and the pipes. One end of each pipe is connected with the pipe fitting. An outer sealing ring and an inner sealing ring are arranged between the pipe fitting and each pipe. A groove structure and a protruding structure corresponding to the groove structure are arranged on the contact face of the pipe fitting and the contact face of each pipe respectively. According to the technical scheme, the groove structures are formed in the inner wall of the pipe fitting, the protruding structures are arranged on the outer walls of the pipes, when the pipe fitting is connected with the pipes, the groove structures are matched with the protruding structures, and the convenient mounting effect can be achieved without auxiliary tools; the inner sealing rings and the outer sealing rings are arranged between the connecting faces of the pipe fitting and the pipes, internal and external dual sealing is achieved, and a good sealing effect is achieved.

The invention relates to an all-bearing baffle plate device of a dry type evaporator and a using method. An existing baffle plate device at present is in a semi-bearing structure form for an evaporating pipe bundle, a bearing span distance is larger, and serious vibration is easily caused. The all-bearing baffle plate device is formed by an all-bearing baffle plate, a correlated pipe plate and the evaporating pipe bundle. The flow speed of a cool-carrying agent is fully increased due to the all-bearing baffle plate device in an evaporator cylinder, the all-bearing form is effectively realized by the evaporating pipe bundle, the bearing span distance is effectively reduced by half, the vibration of the evaporating pipe bundle is prevented, and the heat transfer performance of the evaporator is effectively increased. The all-bearing baffle plate device disclosed by the invention has the advantages that the all-bearing baffle plate of which the outer circle is provided with a thin-edge and flat-surface-shaped notch round plate is adopted, the energy efficiency of the all-bearing baffle plate device is 15%-20% higher than that of the existing baffle plate device, and the all-bearing baffle plate device is an energy-saving device which is simple in structure, good in sealing performance, convenient to manufacture and install and low in processing cost and is capable of effectively preventing the vibration of the evaporating pipe bundle.

The invention relates to a cartridge proportional electromagnetic valve for clutch control, and belongs to the technical field of automatic transmission clutch control. The problems of a complex manufacturing process and high costs of a hydraulic part of an existing proportional electromagnetic valve are solved. The electromagnetic valve comprises an electromagnet assembly, a valve element assembly and a valve body assembly. When the electromagnetic valve is electrified and an electric ball valve is opened, oil liquid enters from an oil supply opening, a part of oil liquid flows out from an oil output opening to enter a working cavity to control oil pressure, and the other part of oil liquid flows back to an oil tank from an oil drainage opening. When the electromagnetic valve reaches a maximum operating current, a baffle closes the oil drainage opening, and only the oil supply opening and the oil output opening form a channel. The cartridge proportional electromagnetic valve is simplein structure and easy to process and assembly, reduces the oil liquid leakage of the valve body, and has high reliability.

The invention relates to the technical field of environmental aerosol measuring, in particular to a simulated lung breathing device. The device comprises a sealing box, a lung model, an air collectingbag and an air pump, and the lung model and the air collecting bag are both arranged in the sealing box and are kept independent of each other; the lung model is connected with a lung pipeline leading to the outside of the sealing box; the air pump is connected with a suction pipeline, the suction pipeline is provided with a first valve and a second valve, and the first valve, the second valve and the air pump form a series loop; the air collecting bag is communicated with the suction pipeline and is communicated between the first valve and the second valve; the first valve and the second valve are three-way valves, and a valve port of each valve is kept to be communicated with air outside the sealing box; the air pump exhausts air from the air collecting bag, the air collecting bag contracts, the air pressure in the sealing box is reduced, airflow enters the lung model from the lung pipeline, and the inspiration process is completed; the air pump inflates the air collecting bag, theair collecting bag expands, the air pressure in the sealing box is increased, airflow flows out of the lung model along the lung pipeline, and the expiration process is completed.

The invention discloses a barrel cover shaped slot end surface mechanical sealing structure capable of rotating bilaterally. The barrel cover shaped slot end surface mechanical sealing structure comprises a rotating ring and a static ring, which are mechanically sealed, wherein a plurality of barrel cover shaped fluid dynamic pressure slots which are uniformly distributed in the peripheral direction are formed in at least one sealing end surface of the rotating ring or the static ring, and the dynamic pressure slots are symmetrical with respect to the radial center lines of the dynamic pressure slots; and each dynamic pressure slot comprises a slot hole, slot walls and a slot root which are sequentially connected, the slot hole is formed in the high-pressure side of the sealing end surface, the slot root is arranged at the low-pressure side of the sealing end surface, the slot walls comprise a rectangular slot wall and a tapered slot wall which are sequentially connected, the rectangular slot wall is connected with a small tapered surface of the tapered slot wall, and a large tapered surface of the tapered slot wall is connected with the slot root to form a sharp corner shaped convergence structure. The barrel cover shaped slot end surface mechanical sealing structure is simple in shape structure, and is convenient to design and produce. When the rotating rings of the device positively or negatively rotate along with a rotary shaft, continuous and stable fluid films can be formed between the sealing end surfaces of the rotating rings and the sealing end surfaces of the static rings.

The invention discloses a wireless monitoring-alarming system based on Internet of things. Remote wireless control from a smart phone terminal to a monitoring terminal can be realized, so that management personnel can get a state of a monitoring area at any time. The wireless monitoring-alarming system comprises a monitoring terminal, an Arm development board and the smart phone terminal, wherein the monitoring terminal comprises a micro camera, a human body infrared sensor, a GPRS (General Packet Radio Service) communication module, an SD (Secure Digital) card, a lithium battery, a liquid crystal screen and a matrix keyboard; the Arm development board comprises a video driver, a display screen driver, a communication driver, a character equipment driver and an SD card driver; and the smart phone terminal comprises a user entry module, an information receiving module and an instruction sending module. The wireless monitoring-alarming system is effectively applied to various indoor and outdoor monitoring areas into which people is forbidden to enter, and personal or collective property safety is ensured. The wireless monitoring-alarming system is simple in outline shape and convenient to install, operate and use, and has high practicability.

The invention relates to a synchronous transmission mechanism for a yarn feeder, which comprises transmission wheels of a plurality of yarn feeders arranged circumferentially, and an annular synchronous belt; outer edges of the transmission wheels are provided with a plurality of bulges circling at equal intervals; and the annular synchronous belt is provided with a plurality of concave holes in a mode that the concave holes are at the same interval lengths as the transmission wheels, so that the bulges are matched with the concave holes. The transmission mechanism is simple in structure and convenient to machine; and simultaneously, based on the characteristics of the transmission mechanism, users can cut the synchronous belt freely to the appropriate length according to requirements, so that the synchronous belt can be linked up for use, and the synchronous transmission mechanism brings great convenience to the users, manufacturers and retailers.

The invention discloses a drum-shaped filter screen support structure in a nuclear power plant. The structure comprises a spindle, a spindle bearing seat, a bearing seat base plate, a drum-shaped filter screen protection device, a hub and spokes, wherein the spindle is mounted in the spindle bearing seat; the hub is mounted on the spindle; the spokes are connected with the hub; the drum-shaped filter screen protection device comprises a protection pressing block and a protection pull rod; the bearing seat base plate is fixed on a concrete floor plate; the spindle bearing seat is connected below the protection pressing block; and the protection pressing block is connected with the bearing seat base plate through the protection pull rod. Before being damaged, a drum-shaped filter screen canbe pulled off through a pull-off load of the protection pull rod, and thus security of the drum-shaped filter screen can be ensured. As the drum-shaped filter screen protection device is arranged on the spindle bearing seat of the structure, the drum-shaped filter screen can be pulled off by the protection pull rod in case of large buoyancy, and a protection function on the drum-shaped filter screen can be achieved. The hub is of a forged piece structure, and the spokes are of H-shaped steel structures.