47results about How to "Good airtightness" patented technology

The invention provides a steel plate and concrete combined underground continuous wall which is formed by the connection of a plurality sections of wall bodies, and each wall body is composed of two outer steel plates (1) and inner concrete (2), the two outer steel plates (1) are connected with cylindrical cross-pulling rebars (3) and rectangular vertical baffles (4), as the vertical baffles (4) are arranged between the two steel plates, the concrete can be poured into branched storehouses and the joint pipes are saved; the end part of each steel plate (1) is bent into an L-shape to form a steel plate joint (6), so as to guarantee the wall body to be provided with better anti-permeability after butt joint; the wall is in mutual vertical connection with a beam plate (7) of the architectural structure, the rebar of the beam plate (7) can be welded onto the steel plate of the underground continuous wall, and rebars or the stiffeners (8) of the steel plate and the triangular bearing (9) are arranged on the relevant position of the wall body. The invention further provides a construction method of the steel plate concrete composite underground continuous wall, which comprises six steps. The underground continuous wall provided by the invention is good in anti-permeability, small in wall body section and is provided with supporting and bearing functions.

A can (1) of which spout after opening can be securely resealed and can be opened and closed with an easy operation is provided. The can (1) has a spout (3) that is opened by lifting and pulling a pull-ring (6) fixed on a top wall (2) of a can body (1a) with a rivet (5) to bend a sealing tongue portion (4) toward the inside of the can. Inside the top wall (2) and away from the spout (3), an internal sealing member (7) having a fan shape with its pivot mounted to the rivet and a size capable of sealing the spout (3) is disposed to be fixed to the rivet (5). After opening the spout (3), by rotating the pull-ring (6) around the rivet (5), the internal sealing member (7) is also rotated at the same time. As an interlocking mechanism therefor, the rivet (5) is rotatably supported by the top wall (2), and a base end of the pull-ring (6) and the pivot of the internal sealing member (7) are fixed to the rivet (5), respectively.

The invention relates to an oil pipe threaded connection structure, which is formed by screwing an oil pipe end (10) with an outer thread together with a pipe joint (11) with an inner thread. The threads adopted by the oil pipe end (10) and the pipe joint (11) are both approximate trapezoidal tapered threads; the head part of the oil pipe end (10) is provided with a circular arc surface (4); a circular conical surface (3) in interference fit with the circular arc surface is arranged on the pipe joint (11); the head part of the oil pipe end (10) is provided with an outer torque step (8); an inner torque step (7) matched with the outer torque step (8) is arranged on the pipe joint (11); the middle segment of the heat part of the oil pipe end (10) is provided with an outer cylindrical surface (2); an inner cylindrical surface (1) in interference fit with the outer cylindrical surface (2) is arranged on the pipe joint (11). The structure has the advantages of high threaded connection strength, good sealing performance, easy buckling, difficult buckling separation, good thread gluing preventing performance, strong over-torque preventing capability, etc.

The invention relates to a preparation method and an application of high expansion coefficient copper sealing glass powder, wherein the technical difficult problems of high cost, long production period, high use environment requirements and the like of the existing copper seal electrical connector are solved. The high expansion coefficient copper sealing glass powder adopts a phosphate glass system and comprises the following components by mole: 45-65% of P205, 10-15% of B203, 4-15% of Al2O3, 5-20% of Na2O, 8-22% of K2O, and 0-12% of PbO+BaO+CaO+MgO. The application comprises: carrying out mixing, heating, stirring, molding, drying and other steps on the glass powder and a paraffin thin sheet, assembling a sealing copper shell and a glass billet, placing on a graphite mold, placing into a nitrogen atmosphere furnace or vacuum furnace, carrying out thermal insulation for 30 min at a temperature of 600-780 DEG C, and cooling to a room temperature to obtain the electrical connector with characteristics of high temperature resistance, high resistivity and high air-tightness. According to the present invention, the glass powder can match to the copper alloy shell expansion coefficient, the produced copper alloy electrical connector can achieve good electrical property, the preparation method is suitable for industrial production, and the economic benefits can be increased.

The invention provides a direct connection type double-step threaded joint comprising a female joint and a male joint. In the axial direction of the direct connection type double-step threaded joint, the female joint successively comprises a first threaded section, a female joint shoulder transition section, a female joint torque shoulder, a female joint sealing surface and a second threaded section. In the axial direction of the direct connection type double-step threaded joint, the male joint successively comprises a third threaded section, a male joint sealing surface, a male joint torque shoulder, a male joint shoulder transition section and a fourth threaded section. The first threaded section and the second threaded section are internal threaded sections, and the third threaded section and the fourth threaded section are external threaded sections. The first threaded section and the fourth threaded section are in threaded engagement and the second threaded section and the third threaded section are in threaded engagement. The female joint sealing surface and the male joint sealing surface are in interference seal. The direct connection type double-step threaded joint has favorable anti-compressing and anti-torque capability, excellent gas sealing performance and greater connecting strength.

The invention discloses an underground broiler chicken breeding method and an underground broiler chicken breeding house. The underground breeding broiler chicken method is characterized by comprising the following steps of: (1) building a broiler chicken breeding house at a position of 3-4 meters deep below the ground and arranging a [-shaped buffering sterilizing air channel matched with the broiler chicken breeding house to form an integrated underground broiler chicken breeding system; (2) arranging air purification equipment and wet curtains at air intake ends of the underground broiler chicken house; and (3) forming good leakproofness of the underground broiler chicken house. The method has the advantages of improving breeding success rate, reducing diseases of chickens, reducing dosage of medicine by 60%, improving breeding density by four times, saving 50 percent of electricity for cooling by using underground natural temperature, saving 80 percent of coal in heating, reducing cost of each chicken by 2.95 RMB yuan at multiple angles, improving breeding quantity of a unit building area of the chicken house by 4 times and saving field by twice.

The present invention relates to a suspension formula of nimbin microcapsule. Said formula includes (by wt%) 0.03%-1% of nimbin, 8%-40% of capsule wall material, 15%-20% of capsule core solvent, 0%-25% of filling agent, 0.1%-0.5% of emulsifying agent, 0.5%-1% of pH regulator, 0.5%-5% of viscosity regulator, 4%-12% of suspension agent, 0.1%-0.5% of antifreezing agent and rest is water, in which the capsule wall material is beetle or terpolycyantoamino-formaldehyde resin, the capsule core solvent is trichloromethane or toluene, the filling agent is petroleum ether, emulsifying agent is sodium lauryl sulfate or polyvinyl alcohol, the suspension agent is NaCl, the viscosity regulator is sodium cellulose glycollate, Tween-20 and acacia gum.

The invention discloses a multifunctional coal sample heating oxidizing rule testing platform capable of achieving automatic sampling. The multifunctional coal sample heating oxidizing rule testing platform comprises a gas distribution and intake part and an operation testing part. The gas distribution and intake part is used for automatically controlling the flow and proportions of all kinds of gas about to flow into the device and then introducing the mixed gas into the corresponding operation testing part. The operation testing part mainly comprises a heat transfer coal sample tank, a heat insulation tank and the like, and a gravity sensor, a temperature sensor and the like are arranged on each of the heat transfer coal sample tank and the heat insulation tank. When coal sample heating oxidizing rule testing is carried out, the weight, temperature and other states of a coal sample in the coal sample tank can be monitored in real time, meanwhile, a coal sampling device of the device can be utilized for automatically sampling the coal samples at different temperatures, and hazards caused by overflow of high-temperature smoke in the sampling process are avoided. A control cabinet is controlled, automatic gas distribution, automatic testing, automatic sampling and automatic closing can be achieved, and automatic heat radiation can be achieved after an experiment is finished.

The invention discloses an airtight seal sleeve joint. The airtight seal sleeve joint comprises a sleeve male end and a sleeve female end, the sleeve male end is provided with an external thread, the sleeve female end is provided with an internal thread, the external thread of the sleeve male end is meshed with the internal thread of the sleeve female end, and the tooth profile of the external thread and the tooth profile of the internal thread are each of a slanting trapezoid shape. In addition, in the feeding direction of the external thread, the part, behind the external thread, of the sleeve male end is provided with a first seal face and a first retreat stop shoulder connected with the first seal face, and the first retreat stop shoulder is located at the tail end of the sleeve male end. The sleeve female end is provided with a second seal face and a second retreat stop shoulder, the second seal face is in interference fit with the first seal face, the second retreat stop shoulder is matched with the first retreat stop shoulder, and the second seal face is also connected with the second retreat stop shoulder. A gap is formed between the internal thread and the external thread. The airtight seal sleeve joint has good stretch resistance, compression resistance and torque resistance capability, better thread gluing resistance and excellent airtight seal performance and can adapt to the work environment of a three-exceeding gas field.

A medical polymer material dressing for repairing wounds is characterized in that the dressing comprises a water-based polyurethane matrix and a hydrophilic colloid part which is bonded on the matrix, and the hydrophilic colloid part is composed of 20-30 percent of sodium carboxymethyl cellulose, 13-20 percent of pectin, 14-20 percent of gelatin, 30-40 percent of polyisobutylene and 5-10 percent of polyethylene.

The invention relates to a pressure filter, which comprises a single straining chamber device formed by a fixing filter plate, a multifunctional straining chamber ring, a moving frame and a movable filter plate. Wherein, the fixing filter plate has a liquid inlet and a filtrate outlet and a ring to fix the sealing surface of filter plate straining chamber; the surface of fixing filter plate has liquid discharge grooves; the fixed filter plate straining chamber sealing surface and the straining chamber sealing surface of multifunctional straining chamber ring clamp the fixed filter plate filter cloth; another straining chamber sealing surface of multifunctional straining chamber ring and the sealing surface of moving frame fix the filter cloth of movable filter plate; the moving frame via the hydraulic system compresses the moving frame, the multifunctional straining chamber ring and fixing filter plate; the fixing filter plate, multifunctional straining chamber ring and the moving frame form the straining chamber; the movable filter plate can make piston movement inside the straining chamber; the side wall of multifunctional filter chamber ring has a feeding inlet; the surface and side surface of movable filter plate have liquid discharge grooves, while the back surface has guide rod; the hydraulic system via the guide rod pushes the movable filter plate forwards or backwards inside the straining chamber.

The invention discloses a portable communication device which is provided with holding space, a first housing and a second housing. The first housing and the second housing form the holding space. The holding space is home to a PCB, a MIC and a horn BOX. The second housing is provided with a through hole. The sealing structure of the MIC includes a support that extends from the horn BOX towards the through hole. The support and the PCB are sealed through a first sealing body. The end of the support far from the horn BOX nears the through hole and is sealed to the second housing wall through a second sealing body. The support is provided with a channel that is communicable with the through hole; the channel port far from the through hole is communicated with the MIC so as to allow external sound sources to be transmitted to the MIC from the through hole and the channel.

The invention provides a pedometer capable of realizing function switching by clicking, colliding or vibrating. The pedometer comprises a sensor, a processor, a memorizer, a controller and a display, wherein the sensor is used for inducting an outside physical changes amount to generate a triggering signal; the processor is used for receiving the triggering signal of the sensor and carrying out analysis judgment on the received triggering signal to further send out a corresponding control signal; the memorizer is used for storing data; the controller is used for receiving the control signal sent by the processor to generate a corresponding control movement to realize the function switching; the display is used for displaying a function interface. According to pedometer products provided by the invention, a novel design without keys can be adopted; intelligent induction to clicking, colliding or shaking and the like is utilized; particularly, a sound control technology is introduced; therefore, the product has a brand-new concept and brings brand-new use feeling impacts on people; such advantages as miniaturization, imbed type, water prevention, portability and the like are achieved so that the pedometer has a very huge value in the field of pedometer type electronic products.

The invention discloses an airproof radio frequency coaxial connector, which comprises a connecting body 4; an inner cavity of the connecting body 4 is provided with an inner conductor 1; an insulator 3 is arranged between the inner conductor 1 and the connecting body 4; a chuck ring 5 is arranged between the insulator 3 and the connecting body 4; the outside of the connecting body 4 is provided with a remote radio unit RRU 12; the outside of the remote radio unit RRU 12 is provided with a flange 2 of which the outside is provided with a flat washer 7; and the outside of the flat washer 7 is provided with an elastic internal tooth washer 6 of which the outer end is provided with a nut 11. When harmful gas is about to invade a cavity of a filter through the flange 2, because sealing rings are arranged between the flange 2 and the connecting body and on the joint face between the flange 2 and the RRU, the harmful gas can be effectively prevented from invading the cavity of the filter; and when the harmful gas is about to invade the cavity of the filter between the inner conductor 1 and the insulator 3, the harmful gas is prevented by a clearance forced fit structure formed by agnail and the insulator 3; therefore, the airproof radio frequency coaxial connector has the characteristics of stable connecting performance and good air sealability.

The invention discloses a stealing hole pressure plugging device of an oil pipeline. The stealing hole pressure plugging device of the oil pipeline is mainly composed of a rapid clamp, a rubber plug, a beam, a needle frame, a side upright, a plug, a magnetic base, a main cylinder, a diameter measuring shaft, a pointer, a check ring, a locknut, a screw rod, an axial rotary lever, a screw rod feeding lever, a grinding head, a metal gasket, a plugging shaft, a hydraulic meter, a pressure release valve and a cover board. The magnetic base is attracted to the oil pipeline. The side upright is fixed to the magnetic base. The beam is pressed tightly by the rapid clamp and fixed to the upper end of the side upright. The screw rod penetrates through the locknut on the beam and presses the diameter measuring shaft or the plugging shaft tightly. The diameter of a stealing hole is measured through the grinding head at the lower end of the diameter measuring shaft. The stealing hole is plugged through the plug and the rubber plug at the lower end of the plugging shaft. After a short tube is cut off, the plugs are tightly pressed through the cover board and are welded. According to the stealing hole pressure plugging device of the oil pipeline, on the premise that the oil pipeline is under pressure and delivery is not stopped, the diameter of the stealing hole is measured, the stealing hole is plugged, the whole process is conducted in a sealed mode, crude oil is not leaked, the structure is simple, use is safe and convenient, and economic loss caused by a delivery stop of the oil in the oil pipeline is avoided.

The invention belongs to the field of vacuum metallurgical equipment, and in particular relates to an oil cylinder lifting type isolating valve special for a vacuum induction furnace, which is applied between a main chamber and a feeding cabin or temperature measurement cabin of the vacuum induction furnace for isolating or communicating two chamber parts. The isolating valve comprises a valve body (1), wherein a track (3), a valve plate (2), a lifting mechanism (4) and a push and pull mechanism (5) are arranged in the valve body (1); the valve plate (2) is slidably connected with the track (3); one end of the lifting mechanism (4) is fixedly connected with the valve body (1), while the other end is connected with one end of the track (3) through a shaft; the other end of the track (3) is connected with the valve body (1) through the shaft; and one end of the push and pull mechanism (5) is fixedly connected with the valve plate (2), while the other end is connected with the valve body (1) through a shaft. The isolating valve has the characteristics of high sealing property, heat insulation, long service life and the like.

The invention relates to a float planting device, which is characterized in that: the float planting device comprises one or a plurality of float planting units; each float planting unit comprises a platform; a plurality of pores are arranged on the platform; a plurality of floatation tanks connected in a head-to-tail manner are arranged around the periphery of the platform; each floatation tank comprises an inner side, an outer side and a top surface; a bottom surface of the floatation tank is open; the top surface is higher than the platform; the inner side and the outer side are respectively connected at both sides of the top surface; a lower bottom margin of the inner side is connected on the margin of the platform; and the horizontal position of the lower bottom margin of the outer side is lower than the horizontal position of the lower bottom margin of the inner side. The float planting device provided by the invention is low in cost, safe to use, and convenient to store and transport.

The invention relates to a lean burn engine. Gas entering a cylinder is split and the flow direction of gas flow is controlled, so that part of air entering the cylinder cannot be sufficiently mixed with fuel; the fuel concentration of the gas at each part in the cylinder is different; and the fuel concentration of the gas close to a spark plug (1) is relatively high, so that the gas close to the spark plug (1) is easy to ignite to cause stratified combustion so as to fulfill the aim of lean combustion.

The invention discloses a roof structure and a poultry culturing house with the same, and belongs to the technical field of poultry culturing. The roof structure comprises an outer layer roof and an inner layer roof, the outer layer roof covers the inner layer roof, a cavity is formed in the part between the outer layer roof and the inner layer roof, an air inlet structure is arranged between thetwo side edges of the outer layer roof and the inner layer roof, and one or more air windows are arranged in the inner layer roof. The invention further discloses the poultry culturing housing with the roof structure. According to the roof structure, external air flow passes through the air inlet structure under an eave, enters the cavity between the inner and outer layer roofs and flows out fromthe air windows in the inner layer roof, so that air flow entering the house is extremely smooth, the comfort of poultry in the housing is improved to reduce pests and diseases, the sealing performance of the housing is better, the entering of rain, snow and the like is prevented under the condition of normal ventilation, and the appearance is more attractive.

The invention discloses a disassembly-free composite formwork and a construction technology thereof. The disassembly-free composite formwork comprises a disassembly-free formwork body, a connecting hole is formed in the disassembly-free formwork body, a one-way piece is installed in the connecting hole and suitable for passing through the disassembly-free formwork body from outside to inside in a one-way mode, and the connecting hole is suitable for installing a connecting piece when concrete is poured, an auxiliary frame is installed at the outer end of the connecting piece, and the auxiliary frame is suitable for installing a main ridge and a secondary ridge. According to the disassembly-free composite formwork and the construction technology thereof, the problem that slurry leaks after an existing disassembly-free formwork is used for the first time is solved.

A bottle for a lycium ruthenicum drink comprises a bottle cap and a bottle body provided with a bottle neck. The bottle cap is provided with an annular groove matched with the bottle neck. The bottleneck is internally provided with a partition. The partition is provided with a discharge port. The partition is fixedly provided with a material storage barrel. The material storage barrel comprises abarrel body, a push plate and a first elastic piece. The push plate is in sliding connection with the barrel body, one end of the first elastic piece is connected with the push plate, and the other end of the first elastic piece is connected to the partition. The upper portion of the barrel body is further provided with a discharge hole, the outer wall of the barrel body is provided with an external thread, and the barrel body is in threaded connection with the bottle cap. The bottle cap is provided with a pressing block used for pressing the pushing plate. When the bottle cap is in a screwedstate, the distance between the pressing block and the partition is smaller than the distance between the discharge hole and the partition. Compared with a traditional bottle, the scheme is especially suitable for the lycium ruthenicum drink, operation is convenient, the instant drinking demand of a client is met, and the characteristic of lycium ruthenicum is used to the maximum extent.

The invention relates to a portable smoking smoke purifying device which includes a casing with one side provided with an opening. The outer wall of the sealed end of the casing is provided with a smoke inlet pipe, a check valve is disposed in the smoke inlet pipe, the inner wall of the sealed end is provided with at least two positioning columns, and each positioning column is sleeved with a spring. A compression plate is further arranged in the casing and provided with a locating hole matched with the positioning column, and the compression plate is further provided with a plurality of filters and push rods. A casing cover is disposed at the position of a casing opening and further provided with a smoke outlet. According to the portable smoking smoke purifying device, by squeezing the push rod, the compression plate squeezes smoke entering the casing, the smoke is purified through the filter on the compression plate, the manual operation is performed, and the portable smoking smoke purifying device is convenient to carry. The arrangement of the positioning columns facilitates fixation and movement of the compression plate; the arrangement of the spring is favorable for returningof the compression plate; the casing and the casing cover are connected through threads the sealing performance is good, and the installation is convenient. The whole device is simple in structure, convenient to dismantle and clean, simple to use and suitable for outdoor carrying and use.

The invention relates to an oil bushing threaded joint which comprises a coupling and a pipe. The oil bushing threaded joint is characterized in that the coupling is provided with an internal taperedthread, an inner sealing tapered surface with a groove and a reverse stopping circular bead; after the end of the pipe is necked down, a necked-down opening is formed, and the pipe is provided with anexternal tapered thread, an external sealing tapered surface and an oblique end face; the internal tapered thread includes an internal tapered thread tooth bottom, an internal tapered thread bearingsurface, an internal tapered thread tooth top and an internal tapered thread guide surface, wherein the internal tapered thread tooth bottom and the internal tapered thread tooth top are both parallelto the coupling axis; and the external tapered thread includes an external tapered thread guide surface, an external tapered thread tooth top, an external tapered thread bearing surface and an external tapered thread tooth bottom, wherein the external tapered thread tooth top and the external tapered thread tooth bottom are both parallel to the pipe axis. The oil bushing threaded joint has the advantages of the good air-sealing performance and the high connection efficiency, and also has the advantages of being strong in anti-twisting ability and less prone to sticking.

The invention discloses an ellipse-like rotor engine with high sealing performance. The engine comprises an upper end cover, a lower end cover, a rotor, three combustion cavities, three sections of isolation belts, an oil injection ignition device, sealing pin rows and an eccentric driving shaft. According to the technical scheme, a new design scheme is provided for molded lines of the rotor and acylinder body, on the basis, the sealing pin rows are introduced to seal transition areas among the different combustion cavities, the engine can well prevent the structure abrasion effect, the sealing performance among the combustion cavities is effectively enhanced, gas leakage among cylinder bodies is reduced, and the designed molded lines and sealing mode can increase the design error marginof the engine and reduce the machining difficulty of the engine, so that the production cost of the engine is effectively reduced.

The invention discloses a fermentation device for an organic fertilizer. The device comprises an outer shell and an inner liner which are coaxially arranged, wherein an annular cavity is arranged between the outer shell and the inner liner; a steam heating coil is annularly distributed in the annular cavity; an air inlet and an air outlet of the steam heating coil are both formed on the outer shell; a stirring shaft is arranged in the inner liner; stirring blade sets are arranged on the stirring shaft at intervals; the upper end of the stirring shaft extends out of the outer shell and is in rotating fit with the outer shell; a stirring motor used for driving the stirring shaft to rotate is arranged at the top of the outer shell; a feeding port which is communicated with the inner liner is also formed at the top end of the outer shell; a discharging port is formed at the lower end of the inner liner; a methane draining pipe for draining methane is arranged on the upper part of the inner liner; a methane storage tank is connected with the methane draining pipe; a control valve is arranged on the methane draining pipe; a pressure sensor is arranged in the inner liner.

A submarine high-pressure oil gun comprises an oil storage unit and an oiling device; wherein, the oiling device comprises an oil pump assembly arranged in an oil tank; the pump body of the oil pump assembly is provided with two longitudinally arranged oil chambers which are communicated with each other via an opening on the side; one of the two oil chambers is an oil inlet chamber; a piston is arranged in the oil inlet chamber; the bottom of the piston is provided with a return spring; a piston rod connected with the piston is connected with a wrench on the oil tank by transmission after passing through the opening of the oil tank; a sealing element is arranged between the piston rod and the opening of the oil tank; the opening on the bottom of the oil inlet chamber is connected with a screw cap which is provided with oil-absorption holes; a check valve is installed in the oil-absorption hole; the other one of the two oil chambers is an oil outlet chamber which is internally provided with the check valve composed of a steel ball and a spring; an oil outlet channel communicated with a spray rod and the oil outlet chamber is arranged in the oil tank; the spray rod is hermetically connected with the opening of the oil outlet channel. The oiling device is built-in, thus eliminating leakage of rain and no oil produced due to poor leak tightness; in addition, the oil is ensured to be used thoroughly.

The invention relates to a light environment preference selection detecting system for livestock and poultry. The light environment preference selection detecting system for the livestock and poultry is characterized by comprising an outer frame, a plurality of sealing separation plates and a data acquiring and processing system. The outer frame is separated into a plurality of detecting units by the sealing separation plates, a bottom seat of each detecting unit is fixedly connected with a bottom net weighing device, the top of each bottom net weighing device is fixedly connected with an internal frame, each internal frame is fixedly connected with a waterer and a camera, the sealing separation plates for every detecting unit are movably connected with an excrement bearing drawer, the bottom seat and a top plate of each detecting unit are fixedly connected with a forcing fan, the top plate of each detecting unit is fixedly connected with a light tube, a front end side plate of each detecting unit is fixedly connected with a crib weighing device, each crib weighing device is fixedly connected with an egg belt, a top portion of each crib weighing device is fixedly connected with a crib, and the data acquiring and processing system is electrically connected with the bottom net weighing devices, the cameras and the crib weighing devices. The light environment preference selection detecting system for the livestock and poultry can be widely applied to light environment preference selection experiments for the livestock and poultry.

The invention discloses a titanium alloy drill rod which comprises a titanium alloy drill rod pipe body, an internal thread connector and an external thread connector, wherein the internal thread connector and the external thread connector are arranged at the two ends of the titanium alloy drill rod pipe body. The internal thread connector and the external thread connector at the two ends of the titanium alloy drill rod pipe body are special buckle threads, and the special buckle internal thread connector and the special buckle external thread connector are both tapered coarse-tooth wedge-shaped dovetail threads. The invention provides a high-fatigue-resistance service-life connector which is simple in screwing-on operation, excellent in thread gluing resistance and low in repair rate, and the connection safety and the sealing performance are not affected by combined loads. The problems that an existing titanium alloy drill rod connecting thread is poor in tension resistance, compression resistance and bending resistance, and particularly is prone to thread gluing, high in repair rate, poor in fatigue resistance and the like at a high dog leg degree are solved.