61results about How to "Short pitch" patented technology

A coil type condenser for a refrigerator holds a flow of air which cools the condenser by securing a condenser length enough to radiate heat and simultaneously holding enough pitch. In the coil type condenser, a pipe is wound spirally to face a blowing direction of cool air generated by a cooling fan of the refrigerator. The pipe includes a plurality of coils formed integrally each having upper and lower horizontal portions and left and right vertical sides, each of even numbered coils of the coils having a size different from that of each of odd numbered coils thereof. A support member welded to the pipe supporting the pipe. According to the condenser, since pitches between coils forming the coil type condenser are short, a suitable coil length of the condenser can be maintained in a narrow space. Thus, the coil type condenser can prevent an excessive pressure from generating when a compressor initially operates and can used for a small or medium refrigerator.

The invention discloses a nuclear power station conventional island desalted water distribution system full-stop overhauling method. The method comprises the steps that A, ice blockage is carried out on a main pipeline between a conventional island desalted water distribution system and a unit, and an isolating device and a connecting device are additionally arranged at the downstream part of ice blockage; B, a temporary water supply pipeline is connected to the connecting device from an SED, operation verification is carried out on the temporary water supply pipeline, and the temporary water supply pipeline is communicated with the main pipeline between the conventional island desalted water distribution system and the unit through the connecting device after the temporary water supply pipeline is qualified; C, the connecting device is opened to supply water to the unit, and then the isolating device is closed; D, the conventional island desalted water distribution system is made to stop fully, isolating and emptying are carried out, and damaged or aged devices on the main pipeline are replaced; E, a drain valve and a vent valve are opened fully, the system is filled with water, air in the system is exhausted, the system is washed, samples are taken for a laboratory test, and after the samples are qualified, the drain valve is closed, and the conventional island desalted water distribution system is put into operation; F, the connecting device is disconnected with the temporary water supply pipeline, and the connecting device is sealed. The nuclear power station conventional island desalted water distribution system full-stop overhauling method is convenient and rapid to implement, safe and low in cost.

The invention discloses a preparation method and device of spin optical fiber. The preparation method comprises the steps of clamping an optical fiber preformed rod tightly on a rod clamping mechanism of a fiber-drawing tower, moving the optical fiber preformed rod to a hot area of a heating furnace by a feed mechanism, heating the optical fiber perform rod to a molten condition and then forming optical fiber, wherein the optical fiber is continuously cooled when being pulled down, and the spin character can be fixed; enabling the optical fiber to pass through a coating device and performing solidification, and finally, pulling continuously by a pulling device at a speed of V2 and collecting to a wire take-up device; when the diameter of the optical fiber reaches a required amount and tends to be stable, the rod clamping mechanism spins at an angular speed of V1, a main pulling mechanism spins at an angular speed of V3, and meets the requirement that V2 / (V1 plus V3) equals to mu, wherein mu is a screw pitch of the prepared spin optical fiber. In the preparation method provided by the invention, the spin optical fiber is prepared by the preformed rod and the pulling device through performing wire-drawing in reverse rotation at the same time, which is simpler and more reliable than a preparation method of heating, melting, stretching and rotating after peeling a coating layer from optical fiber of a finished product.

A self-feeding double-pump non-clogging dredging machine comprises a floater, a diesel engine, an oil pump, an oil tank, a slurry pump, and a lifting an operating device and six big parts of a machine head, wherein the floater floats on the water surface, the other devices are fixed on the floater, and when two spiral rollers whose spiral directions are opposite rotate, slurry is churned, and the rollers can advance or fall back simultaneously, an axial flow pump conveys slurry to the slurry pump, and the axial flow pump and the slurry pump are combined, which convey slurry to far distance. In the invention three devices which can effectively remove foreign matters, firstly, the two ends of the front end and rear end of the machine head is provided with a disk hobbing-cutter, secondly, a spike which is fixed can be overturned is installed beyond the disk hobbing-cutter, thirdly, the device is a combination of double pumps, a slurry-collecting funnel is arranged in front of a slurry-absorbing opening of the slurry pump, which is provided with an inclined screen mesh to prevent huge granular materials entering into the slurry pump, thereby completely guaranteeing to realize no clogging. The invention works with water, which is applied to dredging work hilly ponds, reservoirs, channels in countryside, and rivers and park lakes in cities.

The invention discloses a cathode line positioning die and a cathode lien positioning and adjustment construction method. The positioning die comprises a rear measuring rod, a front measuring rod arranged on the front side of the middle of the rear measuring rod and a vertical rod fixed behind the rear portion of the front measuring rod, wherein the front measuring rod and the vertical rod are located in front of the rear measuring rod, the rear measuring rod, the front measuring rod and the vertical rod are straight rods, the rear measuring rod and the front measuring rod are arranged in a perpendicular mode, the rear measuring rod and the front measuring rod form a horizontal positioning rack, and a clamping groove for positioning an adjusted cathode line is formed in the rear side of the middle of the rear measuring rod. The constriction method comprises the steps that 1, anode module installation is performed; 2, cathode line installation construction is performed: when the cathode line is installed on any group of anode modules, the process is that 201, upper and lower fixing frames are installed; 202, preliminary cathode line installation is performed; 203, cathode line positioning, adjustment and fixing installation are performed. The cathode line positioning die is reasonable in design, simple and convenient to use and operate, good in using effect and capable of simply, conveniently and rapidly perform accurate cathode line positioning and ensuring cathode line installing precision.

The invention relates to a headbox (1) for a machine for producing a fibrous web (3), especially a paper or cardboard web, from at least one fiber suspension (2), comprising a feed device (4, 5) feeding the at least one fiber suspension (2), a perforated distribution pipe plate (6) arranged immediately downstream thereof and having a plurality of channels (7) arranged in lines (Z) and columns (S), an intermediate channel (8) arranged downstream thereof, extending over the width (B) of the headbox (1) and having a plurality of means (9) for dosing a fluid (10) in partial fluid streams (10.T) to the at least one fiber suspension (2) in a preferably adjustable / controlled manner, the means (9) being spaced apart from each other in the width direction of the headbox (1) and the individual means (9; 9.1) comprising a plurality of dosing channels (11) having respective dosing channel openings (11.1) on the outlet side and a dosing channel length (11), arriving at different levels and being connected to a common supply channel (12). The headbox (1) according to the invention is characterized in that the dosing channel length (11) of the dosing channel (11) is 1.5 times longer than the dosing channel opening (11.D) of the dosing channel (11) on the outlet side and in that the distance (A) of the dosing channel opening (11.1) of the dosing channel (11) on the outlet side to the turbulence generator (13) ranges from 0 to 50 mm.

The invention provides a fan-out-type wafer-level packaging structure and a preparation method therefor. The structure comprises a rewiring layer; a first flip chip which is bonded to the upper surface of the rewiring layer; a metal connecting column which is bonded to the upper surface of the rewiring layer; a second flip chip which is bonded to the upper surface of the metal connecting column; a plastic packaging layer which is located on the upper surface of the rewiring layer; a passivation layer which is located on the lower surface of the rewiring layer, wherein the interior of the passivation layer is provided with a plurality of openings; a welding ball convex block which is located in the opening, and is electrically connected with the rewiring layer. In the structure, the lower surface of the rewiring layer is provided with the passivation layer, and the passivation layer can effectively prevent the welding ball convex block in a ball dripping state from moving in a reballing backflow process, thereby guaranteeing the performance of a device in the structure, and improving the yield.

The invention relates to a fuel additive and in particular relates to an anti-static fuel additive and a preparation method thereof. The anti-static fuel additive comprises polyamino sulfone shown in a formula (I). Amino and sulfonyl in the anti-static additive are in a same molecule, and the ratio of amino to sulfonyl is fixed, so that the anti-static additive can be also kept in gasoline or diesel in the absence of a stabilizer, the electrical conductivity of an oil product is stable, the production program of the anti-static additive is simplified, and the cost is lowered; and the anti-static additive is not easily adsorbed by metallic media, the electric conductivity of gasoline or diesel is not easily attenuated during transportation and usage processes, and the stability of the electrical conductivity is high.

A platform screen door system includes a fixed driving panel and at least one door leaf slidable relative to the fixed driving panel. Further included is a telescopic guide including a fixed guide mounted on the fixed driving panel, a moving guide mounted on the at least one door leaf, and a moving intermediate guide mounted on the fixed guide. Also included is a drive means for slidably moving the at least one door leaf from a closed position to an opened position wherein the at least one door leaf overlaps the fixed driving panel.

The invention provides a micro-channel anode water mist removing device. The micro-channel anode water mist removing device comprises a high-voltage electrostatic power supply, a columnar cylinder body, concentrated water mist discharging equipment, a wire mesh anode plate and a plurality of cathode lines; the wire mesh anode plate is an anode plate with a micro-channel which is formed by piling up a plurality of metal wires in an interweaved manner; the columnar cylinder body is communicated with the concentrated water mist discharging equipment; the wire mesh anode plate is transversely arranged inside the columnar cylinder body; the cathode lines are all transversely arranged inside the columnar cylinder body, and located in the air inlet direction of the wire mesh anode plate; the negative electrode of the high-voltage electrostatic power supply is connected with the cathode lines to form a cathode, and the wire mesh anode plate is correspondingly formed as an anode. The micro-channel anode water mist removing device disclosed by the invention has the advantages of being capable of greatly reducing the on-way resistance of water mist particles to improve the adsorption rate so as to reduce the time consumption, and only requiring to provide micro voltage of 10 to 20KV to meet adsorption requirements, thereby being capable or reducing the consumption of electric energy, and further being capable of effectively preventing the water mist particles from running away, and being very excellent in water mist removing effect.

The present invention provides a liquid crystal display device, wherein the backlight has a light guiding plate, a first light source group made up of light sources aligned along a first side of the light guiding plate and a second light source group made up of light sources aligned along a second side that faces the first side, the first light source group has a first region where the distance between adjacent light sources is a first distance and a second region where the distance between adjacent light sources is a second distance that is smaller than the first distance, the second light source group has a third region facing the first region and a fourth region facing the second region, the third distance between adjacent light sources in the third region is smaller than the fourth distance between adjacent light sources in the fourth region, and semiconductor devices are positioned so as to face the first region.

The micro thread implant includes one conic top with larger upper part and smaller lower part, one conic hole including one octagonal middle part and one lower screw hole part and surface coating of hydroxyapatite. It features the neck with fine thread, the root part with self-tapping straight thread and the conic end, with both the fine thread and the straight thread being saw tooth threads. The present invention has high neck strength, capacity of preventing microbes from invading, easy integrating with bone, easy screwing into the jaw bone and self locking, and may be used in repair dental defection, especially false tooth implanting operation.

A method for raising Xinshan wax tree seedlings by cutting is characterized by comprising the following steps of seedbed arrangement, cutting selection, cutting processing and management after cuttage.

The invention discloses a method for extracting a color point cloud in a laser-scanned target object, comprising the following steps of emitting, by an emitting module, a first laser beam, a second laser beam and a third laser beam, and recording the emitting time of the first laser beam, the second laser beam and the third laser beam; forming spots on the opposite surfaces of a target object, wherein the spots scan the target object; enabling the first laser beam, the second laser beam, and the third laser beam to be reflected on the opposite surfaces so as to form a laser echo signal with acharacteristic detection parameter, recording the acquisition time of the laser echo signal, and recording the characteristic detection parameter of the laser echo signal; calculating a first electrical signal, a second electrical signal and a third electrical signal; calculating the color point cloud data and outputting the corresponding color point cloud data. The method for extracting the colorpoint cloud in the laser-scanned target object can more accurately acquire the color point cloud data, is not affected by an ambient lighting factor, and has good practicability.

The invention discloses a molybdenum disulfide nanosheet with folds. The thickness of the molybdenum disulfide nanosheet is less than 10 nm, and the interval between sheet layers of the molybdenum disulfide nanosheet with the folds is 8-12 nm. The invention further discloses a preparation method of the molybdenum disulfide nanosheet with the folds and application of the molybdenum disulfide nanosheet to catalysis of hydrodeoxygenation of long-chain fatty acid into alkane.

The invention relates to a green-sepal low temperature resistant eggplant breeding method, and belongs to the technical field of breeding in the agricultural production. A stable line CL-1-21-2-3-10 obtained through hybridization of an excellent line 98-148-2-3-1-81 and an introduced Holland variety Lucia and multi-generation self-crossing and an excellent line B-3-8-3-21-2-2 obtained through multi-generation separation, purification and breeding of an introduced Holland variety Brigitte are crossbred as a female parent and a male parent respectively to obtain 08-5 named Langqi. The obtained Langqi has the characteristics of green sepal, low temperature resistance, long rod-shaped fruits and the like.

The invention provides an automobile coil spot-welding assembly line. The assembly line comprises a PIN spot-welding mechanism, the spot-welding mechanism comprises a public electrode module and a polarization module; the public electrode module comprises a public electrode plate and a public electrode mounting base; the public electrode plate is arranged on the public electrode mounting base, a first electric connecting part is arranged on the public electrode plate, and a first water-cooling pipe is arranged in the public electrode mounting seat; and the polarization module comprises a polarization plate, a polarization mounting base and a mobile module; the polarization plate is arranged on the polarization mounting base, a second electric connecting part is arranged on the polarizationplate, an outer tip of the polarization plate is located outside of the polarization mounting base, and the outer tip of the polarization plate is towards the public electrode plate, a second water-cooling pipe is arranged in the first electrode mounting base, the mobile module is used for driving the polarization mounting base to move towards the public electrode plate, and the polarization module is located on the side of the public electrode plate in the extending direction. By adopting the structure, the spot-welding precision is higher, and the cooling effect is better.

Provided is a mine winch balance chain and lock catch type lifting hook device. The mine winch balance chain and lock catch type lifting hook device is used for preventing the phenomenon that casualty accidents happen when a lifting hook is separated from happening when ore of an inclined shaft of a mine is lifted. According to the balance chain principle, when a winch is used for carrying out lifting, a steel wire rope violently swings, impact force borne by the lifting hook of the winch is maximum, just like the principle in the physics, the distance between a balance wheel and an origin is the largest, the impact force can be reduced through the balance effect of an annular chain, and the technical problem that the lifting hook is separated due to the impact force can be solved. The balance chain is connected with the steel wire rope, the other end of the balance chain is connected with the lifting hook head of the lock catch type lifting hook, and the lowermost end of the balance chain is connected with a hanging ring of a tramcar. The lock catch type lifting hook comprises the lifting hook head, a spring, an elastic opening, a locking bar and a rivet shaft. The hanging ring is fixed to the tramcar, the tip of the elastic opening is longer than the locking bar, the locking bar is usually supported on the elastic opening through the spring and is closed, the head end of the spring is fixedly arranged in a rivet shaft hole, when the lock catch type lifting hook is hung or disassembled, a user presses the locking bar with a hand, the spring is compressed, and the elastic opening is opened.

A device (2) for handling, mounting or demounting components (K, 5, 6, 7) of a wind turbine (1), in particular rotor blades (6) and / or a nacelle (7), with the aid of a crane (9) comprises a support (14) which can be connected to the crane (9) while being movable in the direction of a longitudinal axis (15) of said crane, and at least one guying device (16), preferably a guy cable (16a), which is connected at its first end to the movable support (14) and which can be connected by its second end to the component (K, 5, 6, 7) of the wind turbine (1) in order to stabilze the position of the component (K, 5, 6, 7) during handling and mounting. The guying device (16) is connected to the support (14) while being rotatable about the longitudinal axis (15) of the crane (9), preferably being rotatable through at least 90 degrees, more preferably being rotatable through at least 360 degrees, particularly preferably being rotatable through at least 380 degrees. In a method for handling, mounting or demounting components (K, 5, 6, 7) of a wind turbine (1), in particular rotor blades (6) and / or a nacelle (7), with the aid of a crane (9), the position of the component (K, 5, 6, 7) during handling and mounting or demounting is stabilized by means of at least one guying device (16), and the at least one guying device (16) is moved in the direction of a longitudinal axis (15) of the crane (9) during a vertical lifting movement of the component (K, 5, 6, 7). Before and / or during and / or after a vertical lifting movement of the component (K, 5, 6, 7), the at least one guying device (16) is rotated about the longitudinal axis (15) of the crane (9).

The invention discloses a cloth drying mechanism. The cloth drying mechanism comprises a box, heating devices arranged in the box and a cloth supporting device used for supporting cloth. The cloth supporting device comprises a driving roll component and a driven roll component capable of heating the cloth. The driven roll component comprises a heat transfer roll, a heating part arranged on the heat transfer roll in a penetration mode and a cloth guide roll rotatably arranged on the heat transfer roll in a sleeving mode. According to cloth drying mechanism, the driven roll component can be usedfor heating the cloth to increase the temperature of the cloth; the distance between the cloth drying mechanism and the cloth is small in the heating process; the cloth drying mechanism is centralized in temperature and good in heat transfer effect; the thermal utilization rate of a driven roll is increased; the cloth heating and drying efficiency is improved; the cloth drying mechanism has a lowrequirement for the temperature in a box, and energy can be saved effectively.

The invention relates to a heart electric pulse balloon catheter device. The device comprises a pipeline, the pipeline is composed of an inner pipe and an outer pipe which are of a nested structure, the device further comprises an ablation component, the ablation component is arranged at the far end of the pipeline, a main body of the ablation component is an expandable spherical bag body, the expandable spherical bag body is connected with the far end of the outer pipe in a closed mode, and the device is further provided with a flexible circuit and a power source. The flexible circuit is circumferentially distributed on the outer surface of the expandable spherical capsule body, the flexible circuit is divided into a thin part and a wide part, most or all of the wide part is located on the far-end hemispherical surface of the expandable spherical capsule body, an electrode exposed outside is arranged on the wide part, a conductor is arranged on the thin part, and the flexible circuit is connected with the expandable spherical capsule body. The conductor is hidden in the insulating plastic film of the flexible circuit and is connected with an external wire. The device has the advantages that the structural design is reasonable, the ablation intensity and the ablation area are guaranteed, the device can be well attached to heart inner wall tissue and blood vessels, and the device can enter and exit from the human body more conveniently.

The invention relates to a discrete transistor with dual cylindrical grids and embedded with a U-shaped channel and a manufacturing method of the transistor. A highly-integrated metal-oxide-semiconductor field-effect transistor of which distance of 1 nanometer is kept between a source electrode and a drain electrode can be achieved. A cylindrical grid electrode is employed, and the control capability of the grid electrode on a U-shaped single-crystal channel is ensured on the premise that the grid electrode is not introduced to a groove formed by U-shaped single crystal, namely, the integration is improved, and the control capability of the grid electrode on the channel is ensured; and meanwhile, a cylindrical auxiliary-control electrode and the cylinder grid electrode which are separatelycontrolled are employed, the conflicts that the doping concentration of a conventional junction-free transistor channel is excessively low to cause that source-drain resistance is increased and the doping concentration is excessively high to cause that the mobility and the stability of the device are reduced are effectively solved, and thus, the transistor is suitable for promotion and application.

The invention relates to a heart electric pulse zoning balloon catheter device which comprises a pipeline, the pipeline is composed of an inner tube and an outer tube which are of a nested structure, the device further comprises an ablation component, the ablation component is arranged at the far end of the pipeline, a main body of the ablation component is an expandable spherical balloon body, and the balloon body is provided with a balloon opening. The expandable spherical bag body is connected with the far end of the outer tube in a sealed mode, a flexible circuit is distributed on the outer surface of the expandable spherical bag body in the circumferential direction, the small bag is located at the front end of the expandable spherical bag body, the small bag and the expandable spherical bag body are arranged in an integrated mode or a split mode, and the flexible circuit is connected with the expandable spherical bag body in a sealed mode. And the shape and the size of the small balloon are matched with those of a cavity of an ablation part. The device has the advantages of being reasonable in structural design, easy to position and maintain the posture of a working part, capable of guaranteeing the ablation intensity and the ablation area and capable of being well attached to heart inner wall tissue and blood vessels.

The invention relates to a highly integrated square cylindrical gate embedded U-shaped channel field effect transistor and a manufacturing method thereof. Only an insulating medium requires to be filled in the groove formed by U-shaped monocrystalline silicon to realize mutual isolation of vertical channels of the two sides. Metal material or polysilicon material for generating a gate electrode does not need to be introduced into the groove, and the internal structure of the groove is relatively simple so that the highly integrated metal oxide semiconductor field effect transistor of which thelength of the physical gate electrode is only one nanometer in the conventional sense, i.e. the distance between the source electrode and the drain electrode is only one nanometer, can be realized. The square cylindrical gate is adopted, and the control capacity of the gate electrode for the U-shaped monocrystalline silicon channel can be guaranteed without introducing the gate electrode into thegroove formed by the U-shaped monocrystalline silicon so that the degree of integration can be enhanced and the control capacity of the gate electrode for the channel can also be guaranteed. Therefore, the square cylindrical gate embedded U-shaped channel field effect transistor and the manufacturing method thereof are suitable for popularization and application.

A three-phase single-layer winding of an intermediate-frequency permanent magnet motor, which is characterized in that each phase is discontinuously arranged by six short-pitch full-open equal-turn coils and then connected in series to form a three-phase symmetrical short-pitch single-layer winding, with good performance and craftsmanship Simple. The advantages of the present invention are: 1. The three-phase winding is a symmetrical three-phase single-layer structure, the slot fullness rate is high, and the utilization rate of electromagnetic materials is high; 2. The single-layer winding has short pitch, short end, small leakage reactance, magnetic 3. This kind of winding can be used as generator armature winding or motor winding, and can be Y-connected or △-connected. The harmonics are reduced by 68% compared with traditional full-pitch single-layer windings, so The magnetic potential is sinusoidal.

The invention relates to the technical field of electron diffraction and provides an ultra-compact femtosecond electron diffraction apparatus aiming at the technical problem that the conventional ultrafast electron diffraction apparatus difficultly breaks through the 100-femtosecond time resolution. The ultra-compact femtosecond electron diffraction apparatus comprises a femtosecond laser source, beam splitter, a frequency tripling device, an optical delay line, a vacuum chamber, a femtosecond electron gun, an image enhancement module and an image acquisition system, wherein the femtosecond electron gun and the image enhancement module are sequentially arranged in the vacuum chamber along an emergence direction of an ultraviolet laser pulse; the image acquisition system is arranged on the outer part of the vacuum chamber and aligned at the image enhancement module; the femtosecond electron gun comprises a cathode and an anode arranged parallel to the cathode; the anode comprises an anode electrode and a sample supporting net; a central stepped hole which completely penetrates through the anode electrode is formed in the center of the anode electrode; a larger hole of the central stepped hole is positioned on the anode surface far away from the cathode; and the sample supporting net is fixedly arranged in the central stepped hole.

The invention relates to an annular chain safe device of a winch for lifting, in particular to an annular chain as a hook safety device of a mine winch for lifting materials, ore, and the like. Several sections of annular chains are connected to a hook head of the hook, and the other end of the annular chain is connected with a wire rope. The annular chain safe device is simple in structure, convenient to manufacture and economic, and is suitable for the condition of great load. Because of the short pitch of the annular chain, the invention has favorable flexibility, and the annular chains are extruded up and down and left and right to take a buffer action so as to surely prevent unhooking and personal injury accidents. The device uses not less than 5 sections of thick or thin annular chains. Another device is a latch-closed hook. When the hook is hooked or unhooked, an elastic movable locking strip is pressed with a hand and then loosened, and the locking strip automatically locks the lock mouth under the action of elastic force.

The invention discloses a special mirror image harmonic filter for rail transit, which comprises a base and a casing. The base is provided with a connecting platform, the bottom of the casing is attached to the base and fixed by bolts, and the four corners of the top of the connecting platform are connected to a heat shield through fixing columns. , multiple capacitors are installed on the top surface of the connecting table, the capacitor includes an insulating sleeve, the bottom of the insulating sleeve is connected to the top surface of the connecting table, a fixed electrode is installed on the top of the inner cavity of the insulating sleeve, the movable electrode is slidingly clamped in the inner cavity of the insulating sleeve, and the installation and adjustment between the capacitor and the base Mechanism, the top four corners of the heat insulation board are connected to the hanging plate through the fixed column, the inductor is installed at the bottom of the hanging plate, and a plurality of cooling holes are opened on the shell. The capacitor is located under the inductor and separated by a heat shield. The capacitor and the inductor dissipate heat through the cooling holes to avoid the high temperature generated by the inductor from burning the capacitor. The adjustment mechanism can adjust the distance between the movable electrode and the fixed electrode, thereby adjusting the capacitance of the capacitor. Adjust the filtering range of the filter to facilitate the use of different devices on the tram.

The invention discloses an automatic elbow inserting machine which comprises a rack, and the rack is provided with a material distributing mechanism capable of arranging heat exchange tube elbows at intervals, a fixing mechanism used for fixing a heat exchanger and a material taking and tube inserting mechanism used for taking out the heat exchange tube elbows and inserting the heat exchange tube elbows into the heat exchanger. The material taking and pipe inserting mechanism comprises an elbow box capable of sucking heat exchange pipe elbows in a vacuum mode, a displacement drive capable of driving the elbow box to move in the three-dimensional direction and a deflection drive capable of driving the elbow box to deflect in the horizontal direction. The device has the advantages of being high in automation degree, simple in structure, low in cost, high in working speed and high in efficiency.