167results about How to "Guaranteed connection strength" patented technology

This utility model relates to the field of milling cutter technology and discloses a milling cutter that is easy to install. It includes a milling cutter shank section, a milling section at the bottom of the shank section, and a composite cylindrical component slidably mounted on the top surface of the shank section. The surface of the composite cylindrical component has friction grooves, and the inner wall of the composite cylindrical component has several positioning holes along its longitudinal direction. This utility model uses the composite cylindrical component, T-slots, positioning holes, composite I-shaped grooves, and limiting components, positioning screw holes, and limiting screws to form an auxiliary structure. After assembly and use based on the structure of the milling cutter shank section, the friction grooves on the surface of the composite cylindrical component effectively ensure the connection strength with the tool holder and the subsequent compressive strength of the cutter. Compared to other complex technical solutions in the prior art, the auxiliary structure and assembly and use of the milling cutter shank section in this application maintain convenient installation and usage conditions.

This utility model discloses a waterproof structure for steel structure exterior wall joints, belonging to the field of steel structure exterior wall waterproofing technology. It includes: multiple sets of exterior wall panels and waterproof components; drainage components for draining rainwater are provided at the intersections of the multiple sets of exterior wall panels; the waterproof components include: mounting seats adapted to fit within the gaps on one side of two sets of exterior wall panels; a fixing mechanism is connected to the inner wall of one side of the mounting seat; a waterproof cover is adapted to fit on the other side of the mounting seat; an installation mechanism is provided between the waterproof cover and the mounting seat; and a sealing mechanism is provided between one side of the mounting seat and one side of the waterproof cover. This utility model, through the coordinated use of the mounting seat, fixing mechanism, waterproof cover, installation mechanism, and sealing mechanism, enables rapid assembly and partial replacement of the mounting seat and waterproof cover, ensuring connection strength while avoiding the maintenance difficulties caused by traditional welding.

The invention belongs to the technical field of oil and gas leakage detection and alarm, and particularly relates to a safety valve inner leakage detection prompt sealing gasket and a use method.The safety valve inner leakage detection prompt sealing gasket comprises a sealing washer, a reinforcing ring is embedded in the inner ring of the sealing washer, and a diaphragm piece is fixedly connected to the inner side of the reinforcing ring; the blowing end of the sound production part faces the inner cavity of the safety valve and is used for ensuring that gas from the inner cavity of the safety valve blows the sound production part, and a plurality of cracking grooves are uniformly formed in the diaphragm piece in the radial direction; the safety valve can give a sound alarm when small flow passes through and give a fracture alarm when large flow passes through, can timely discover internal sealing leakage caused by environmental temperature, valve body quality, spring failure, unreasonable adjustment and the like in the production process of the safety valve, especially can timely discover small leakage, provides timely discrimination capability for production abnormity, and improves production efficiency. Production operation and maintenance activities are greatly facilitated, material loss is reduced, production is stable, and the operation and maintenance cost is reduced.

This invention belongs to the field of pressure sensors, specifically relating to an oil-filled core for a MEMS pressure sensor suitable for high-pressure, small-molecule media. It comprises a pressure ring, a corrugated diaphragm, a core base, sealing steel balls, and components such as silicone oil, a ceramic seat, a pressure chip, and leads located within a sealed cavity formed by the corrugated diaphragm and the core base. This invention addresses the shortcomings of traditional oil-filled cores for MEMS pressure sensors by improving the design in multiple structural and manufacturing aspects, solving problems such as small-molecule media infiltration, lead breakage failure, and high-pressure connection sealing. It is particularly suitable for accurate pressure measurement of high-pressure, small-molecule media.

The utility model discloses the modularization quick change device of adjustable pipeline lining winding mould, include: mould body, mould body includes the multiple modularization board spare of movable arrangement installation in the middle part. The utility model discloses the modularization quick change device of adjustable pipeline lining winding mould, and the pipeline lining structure of the middle part of mould body is composed of modularization board spare, and after appearing damage in use, can conveniently carry out individual replacement adjustment, simultaneously, the modularization board spare after individual replacement adjustment, same can rely on the clamping block and the clamping groove of its both ends and the modularization board spare of adjacent interval and carry out the clamping connection to ensure the connecting strength, also can rely on the first connecting column and the connecting mouth of its both ends and right mounting seat and left mounting seat and carry out the clamping connection to ensure the stability after installation, and modularization board spare also can be according to the need of using, transverse assembly to adjust its length to improve its flexibility in use.

This utility model relates to the field of protective cover technology, specifically a protective cover for connecting a rebar threaded sleeve. It includes a protective cover body, with a sealing plug and a sealing sleeve fixedly connected to the left side wall of the protective cover body. The sealing plug is located in the middle of the left side wall of the protective cover body, and the sealing sleeve is located outside the sealing plug. The protective cover body is inserted into one end of the rebar threaded sleeve via the sealing plug. In operation, the sealing plug is fully inserted into the exposed end of the rebar threaded sleeve. The threaded sleeve is rotated counterclockwise to move to the left along the outer wall of the threaded tube. The threaded sleeve drives the connecting rod and the compression ring to move to the left. The compression ring compresses the circular rubber strip and the sealing sleeve, causing the sealing sleeve to deform and tightly adhere to the outer wall of the rebar threaded sleeve. This reduces the gap between the inner wall of the sealing sleeve and the outer wall of the rebar threaded sleeve, forming an outer seal and reducing the entry of external dust and moisture into the rebar threaded sleeve.

The utility model relates to the field of building decoration and equipment installation, and discloses a novel anchoring assembly which comprises an anchoring base plate and L-shaped pressing plates, four sliding grooves are formed in the middle of the top end of the anchoring base plate, and the two L-shaped pressing plates are arranged at the top of the anchoring base plate in a sliding mode. Four sliding mandrels are fixedly arranged at the bottoms of the two L-shaped pressing plates, butt-joint type anti-falling blocks are fixedly arranged at the tops of the two L-shaped pressing plates, pressing plate clamping grooves are formed in the inner sides of the two L-shaped pressing plates, square pipes are connected into the two L-shaped pressing plates in a clamped mode, and clamping grooves are formed in the inner sides of the two L-shaped pressing plates. A sliding adjusting structure composed of a sliding groove of an anchoring base plate and sliding mandrels of L-shaped pressing plates is arranged, butt joint type anti-disengaging blocks are arranged at the tops of the two L-shaped pressing plates, when the L-shaped pressing plates are clamped, the anti-disengaging blocks are attached to each other to form a blocking face to prevent looseness, pressing plate clamping grooves are formed in the inner sides of the two L-shaped pressing plates, and therefore the anti-disengaging blocks can be clamped tightly. And the anti-falling tenon is clamped with the anti-falling tenon on the surface of the square tube, so that the square tube is fixed.

The present application relates to the technical field of baby swings, and particularly relates to a backrest angle adjusting mechanism, a seat and a baby swing. The backrest angle adjusting mechanism comprises a front wall pipe, a rear wall pipe, a first pivot as a rotation center, a first clamping groove and a second clamping groove, a sliding groove, a clamping block, a first abutting portion, a first stop portion, a second abutting portion and a second stop portion. The rear wall pipe is rotatable relative to the front wall pipe. The sliding groove is axially arranged on the rear wall pipe. The clamping block is slidably arranged in the sliding groove. The clamping block is selectively clamped with any one of the first clamping groove and the second clamping groove. The first abutting portion is arranged at the end of the rear wall pipe. The first stop portion is arranged on the front wall pipe to stop the first abutting portion. The second abutting portion is arranged at the end of the front wall pipe. The second stop portion is arranged on the rear wall pipe to stop the second abutting portion. The backrest angle adjusting mechanism can adjust the angle between the rear wall pipe and the front wall pipe, and can ensure the connection strength between the rear wall pipe and the front wall pipe.

The invention relates to the technical field of civil engineering, in particular to a steel sheet pile supporting device. The steel sheet pile supporting device comprises a pile plate body, an enclosing purlin assembly and a steel pipe support, and the pile plate body is fixedly connected with the enclosing purlin assembly through a hanging piece; the enclosing purlin assembly comprises a front plate, a rear plate and I-shaped steel, the front plate and the rear plate are connected through at least two sets of first bolts, and the length of the first bolts is larger than the distance between the front plate and the rear plate. The I-shaped steel is inserted between the front plate and the rear plate, and the number of the I-shaped steel is 2-3; the steel pipe support is a steel pipe, the steel pipe support is connected with the front plate, at least two sets of first stiffening ribs are arranged at the end of the side, close to the front plate, of the steel pipe support, and the steel pipe support is in threaded connection with the supporting piece through the first bolt holes. According to the supporting device, the assembling procedure is greatly simplified, the connection between the steel pipe support and the enclosing purlin assembly is firmer and more reliable, the load effect under the full working conditions of supporting tension, pressing and the like can be effectively resisted, and the overall stability and the bearing capacity of the supporting device are further improved.

The utility model relates to a kind of combination structure of table beam and table leg and table, the combination structure includes crossbeam (1), table leg (2), end cap (3), connecting piece (4);The both ends of the crossbeam (1) are equipped with crossbeam end portion inner cavity (13);The end cap (3) includes end cap main body (31);The end cap main body (31) is embedded crossbeam end portion inner cavity (13);The crossbeam (1) is connected with table leg (2) by end cap (3);The both ends of the crossbeam (1) are also equipped with crossbeam bottom groove (12);The connecting piece (4) is connected with crossbeam bottom groove (12);The crossbeam (1) is connected with table leg (2) by connecting piece (4). Compared with prior art, the crossbeam in the utility model is connected with table leg by end cap and connecting piece in different directions, in the case of ensuring the connecting strength, the welding piece on table leg is dispensed with, so that the more economic packaging demand is achieved, and the combination structure of the utility model is easy to install and disassemble.

The utility model belongs to the technical field of hollow-core optical fiber cables, and particularly discloses a hollow-core and solid-core hybrid optical fiber cable, which comprises at least two 8-shaped solid-core optical fiber and hollow-core optical fiber hybrid optical fiber bundles, each 8-shaped solid-core optical fiber and hollow-core optical fiber hybrid optical fiber bundle comprises a solid-core optical fiber, a hollow-core optical fiber and a connecting structure, the solid core optical fiber comprises a solid core optical fiber core, a first cladding and a first coating which are sequentially arranged from inside to outside; the hollow-core optical fiber and the solid-core optical fiber are equal in length, and the hollow-core optical fiber comprises a hollow-core optical fiber core, a second wrapping layer and a second coating which are sequentially arranged from inside to outside; the connecting structure wraps the first coating and the second coating so as to connect the first coating and the second coating into a whole. The hybrid optical fiber cable is based on hybrid cabling of the hollow-core optical fiber and solid-core optical fibers such as G.652D, G.654E or G.655, assistance can be provided for positioning of abnormal points of the hollow-core optical fiber by means of detection of the abnormal points of the solid-core optical fiber, meanwhile, a network can be rapidly recovered by means of the solid-core optical fiber, the fault influence is reduced, and the application and maintenance convenience of the hollow-core optical fiber is improved.

This invention discloses a composite material flame tube and an aero-engine, belonging to the field of aero-engine technology. The flame tube includes a metal frame, an inner ring assembly, and an outer ring assembly. The metal frame includes a flame tube head assembly, a nozzle seat support rod, a positioning pin support rod, an outer ring outlet assembly, and an inner ring outlet assembly. The flame tube head assembly includes an annular head base, which is connected to the outer ring outlet assembly via the nozzle seat support rod and the positioning pin support rod. The head base is also connected to the inner ring outlet assembly via the positioning pin support rod. A nozzle seat is installed in a pre-set mounting hole on the nozzle seat support rod. A positioning pin bolt is installed in a pre-set sixth screw hole on the positioning pin support rod. The positioning pin bolt is used to connect and position the inner ring of the flame tube to the positioning pin support rod, and also to connect and position the outer ring of the flame tube to the positioning pin support rod. This invention can solve the problem of poor sealing between the metal material and the non-metallic composite material in the hot state of the flame tube.

The application relates to the field of veneer mounting structures, in particular to an indoor large-size veneer mounting structure and a construction method, which comprises a veneer plate, a plurality of connecting assemblies and a plurality of supporting pieces. The connecting assembly comprises a first fixed plate, a second fixed plate, a sleeve, a sliding rod, a compression spring and a lock tongue; the first fixed plate is connected to a base layer; the sliding rod can slide in the sleeve; a storage groove is arranged on the circumferential surface of the sliding rod; one end of the first compression spring is connected to the bottom of the storage groove, and the other end is connected to the lock tongue; a limiting hole for the lock tongue to pass through is arranged on the circumferential surface of the sleeve; the supporting piece comprises a mounting plate, a connecting rod and an abutting plate; the mounting plate is connected to the base layer; one end of the connecting rod is fixedly connected to the mounting plate, and the other end is connected to the abutting plate; when the lock tongue passes out of the limiting hole, the abutting plate is attached to the mounting surface. The application can improve the instability of the large-size veneer mounting structure, and improve the decoration quality and effect of the veneer.

The invention discloses an elastic suction nozzle cover and a water cup, and the elastic suction nozzle cover comprises a drinking component, a turning cover, a cup opening sealing panel, a turning cover assembling seat, a suction nozzle channel piece and a supporting bracket. The suction assembly comprises a suction nozzle and a suction pipe which are communicated, a first protrusion is arranged on the outer side of the suction nozzle, and the suction pipe is sleeved with a limiting piece which is sleeved with a spring; the suction nozzle channel piece is provided with an open inner cavity for containing the drink suction assembly. The cup opening sealing panel is provided with a first opening used for exposing the suction nozzle, and a rotatable shifting rod is arranged on the inner side of a second opening. The flip cover can rotate relative to the cup opening sealing panel, and extrudes the driving lever through the second opening during rotation, so that the driving lever presses the spring to contract, and the suction nozzle contracts along with the driving lever to form storage. The cup opening sealing panel, the flip assembling base and the supporting bracket integrally form a space for containing the suction nozzle channel piece, and the cup body is detachably fixed. According to the technical scheme, automatic stretching and retracting of the suction nozzle are achieved through mechanical linkage, and the problems that a traditional suction nozzle is prone to pollution, poor in sealing performance, poor in heat preservation effect and inconvenient to operate are solved.

The utility model discloses a battery and a power battery system, and relates to the technical field of batteries, the battery and power battery system comprises an insulating film, the insulating film covers the peripheral side of a battery cell, and the insulating film extends out of the battery cell towards a top cover and is connected with an insulating assembly; moreover, the shortest vertical distance between the insulating film and the top cover in the length direction is h1, the shortest vertical distance between the insulating film and the overlapping region of the insulating film and the insulating assembly in the length direction is h2, and the parameters meet a preset relationship, so that the battery and the power battery system can avoid the conditions of explosion point and welding failure of the insulating film caused by welding of the top cover; the connection strength of the insulating film and the insulating assembly is ensured, and the condition of battery short circuit caused by lap joint of the battery core and the shell is avoided.

The present application relates to the technical fields of pile foundation structure, and specifically discloses a large-diameter deep-hole rock-socketed pile; the rock-socketed pile comprises a multi-section variable-diameter reinforcement cage poured in concrete, and the multi-section variable-diameter reinforcement cage can be butt-jointed at the head and tail; the variable-diameter reinforcement cage comprises a variable-diameter framework, a variable-diameter cage and a plurality of self-locking pieces; the variable-diameter cage comprises a plurality of main reinforcements distributed in a circumferential direction around the variable-diameter framework, at least two connecting rods are hinged between each main reinforcement and the variable-diameter framework, and a plurality of spiral stirrups are installed on the periphery of the plurality of main reinforcements; when a force is applied to the variable-diameter framework by pressing it downward, the variable-diameter framework is expanded by the connecting rods, the radius of the spiral stirrups is increased, and the self-locking pieces and the connecting rods are self-locked. The rock-socketed pile provided by the present application avoids the need to pre-produce a variable-diameter reinforcement cage of a corresponding depth each time, improves the flexibility of construction, and greatly shortens the period of material preparation in the early stage.

The present application relates to the field of paper barrel manufacturing, and discloses an expanded-mouth straight-wall type hot-melt adhesive storage paper barrel and a bottom sealing method thereof, which comprises the following steps: S1, a metal ring is sleeved on a paper barrel body, and an end portion sleeved with the metal ring is placed in a diameter expanding machine to expand the diameter, so as to form an expanded end on the paper barrel body; S2, a bottom plate is placed on a tray in a bottom sealing crimping machine, and then the paper barrel body is placed on the bottom sealing crimping machine, the bottom sealing crimping machine clamps the paper barrel body, and the tray sends the bottom plate upward into the expanded end; S3, a crimping die in the bottom sealing crimping machine moves upward, the crimping die crimps the expanded end, the crimping abuts against the bottom plate, the crimping cooperates with an inner top wall of the expanded end to seal the bottom plate, and the bottom sealing is completed. The present application has the advantages of convenient operation, good bottom sealing quality, and the fact that the inner wall of the paper barrel body is a straight wall with a uniform and consistent inner diameter, so that the pressure disc piston can be lowered to the bottom plate, thereby discharging all the hot-melt adhesive, and preventing waste of the adhesive.

The utility model discloses a nut arc welding simple fixture, including clamp module, the clamp module includes clamping mechanism and positioning mechanism, the positioning mechanism includes assembly positioning pin and main positioning pin, and workpiece is positioned on clamping mechanism by main positioning pin, and nut is positioned on workpiece by assembly positioning pin, clamping mechanism includes the head of pressing and be used for the range of activity of the limit stop of welding torch nozzle, the limit stop sets up at the bottom of head of pressing, and the head of pressing is used for the nut on workpiece by assembly positioning pin with workpiece pressure tightly. Overcome the length of the weld between the nut on workpiece and workpiece not easy unified problem.

The utility model relates to label stripping technical field discloses a kind of self-adhesive label stripping positioning device, including rack, the right side fixedly connected with storage pole of rack, the outer wall top of storage pole is equipped with multiple limit holes, the outer wall slidingly connected with sliding block of storage pole, the outer wall top of sliding block is fixedly connected with baffle, the inner wall rotationally connected with rotating shaft of sliding block, the outer wall rotationally connected with baffle pole of rotating shaft, the right side fixedly connected with spring one of sliding block, the right end fixedly connected with limit block of spring one, the top fixedly connected with casing of limit block. In the utility model, through the cooperation of slidable elastic component, different width label roll can be quickly adapted, the efficiency of changing material is improved, the coaxiality is guaranteed, the assembly error is reduced, the precision and stability of different size label processing are significantly improved, and the equipment debugging difficulty and downtime are reduced.

This utility model relates to the field of door lock unlocking and discloses an unlocking device. The unlocking device includes a handle rod and a insert. One end of the handle rod is fixedly connected to the insert, and the other end of the handle rod extends away from the insert. The end of the insert away from the handle rod has a plug-in portion, which is configured as a rectangular insertion slot suitable for fitting the square steel handle. The handle rod serves as the user's grip base, driving the insert to be inserted into the lock box. The plug-in portion is specifically inserted into the lock box, and its rectangular insertion slot ensures precise alignment and fitting with the square steel handle inside the lock box. By twisting the handle rod, the insert drives the square steel handle to rotate, thereby opening the lock cylinder inside the lock box and achieving the unlocking purpose. The extension design of the handle rod away from the insert helps to form an effective lever arm, making it easier for the user to apply force. The unlocking device provided by this utility model has a simple structure, is easy to operate, and has good applicability.

The utility model discloses a high-performance rotor core structure, which is formed by superposing a plurality of silicon steel sheets, the central position of each silicon steel sheet is provided with a disc part, the disc part is provided with a shaft hole, an opening, a raised line and a connecting narrow strip, the end part of the connecting narrow strip is connected with a tooth part, and a tooth groove is formed between two adjacent tooth parts. The holes are used for weight reduction and heat dissipation, so that the weight of the rotor core can be effectively reduced, the operation efficiency of the motor is improved, the heat dissipation performance is improved, and the service life of the motor is prolonged. The protruding strips are used for positioning and supporting the magnets, the connecting narrow strips are connected with tooth parts, tooth grooves are formed between every two adjacent tooth parts and used for assembling the magnets, and side blocking strips are arranged at the positions, corresponding to openings of the tooth grooves, of the tooth parts, so that the magnets can be assembled more accurately and firmly, the loosening risk of the magnets in the operation process is reduced, and the operation reliability of the motor is improved. The connection narrow strips ensure the connection strength, effectively reduce the connection area of the magnetizers, reduce the magnetic leakage phenomenon, and effectively improve the performance of the rotor.

The utility model discloses a composite insulator which comprises an insulating tube, umbrella skirts located on the periphery of the insulating tube and two flanges arranged at the two ends of the insulating tube respectively, the insulating tube is a hollow circular tube, supporting pieces are arranged in the two ends of the insulating tube, and each supporting piece is of a solid cylinder structure. The supporting piece and the insulating tube are coaxially arranged, the supporting piece extends inwards from the end of the insulating tube, the outer diameter of the supporting piece is matched with the inner diameter of the insulating tube, the flange is connected to the outer side of the end of the insulating tube in a pressing mode, and the insulating tube, the supporting piece and the flange are tightly connected. According to the composite insulator, compression joint of the hollow insulation tube and the flange is achieved through the supporting piece, the connection strength and the sealing performance between the hollow insulation tube and the flange are guaranteed, the composite insulator is effectively prevented from losing efficacy at the joint of the flange and the insulation tube, the structural strength of the composite insulator can be brought into full play, and compared with a traditional glue joint technology, the composite insulator is more stable. A long-time glue solution curing procedure is omitted, and the production efficiency is improved.

The application discloses a multi-circle combined pipe and a connecting and locking device thereof, relates to the technical field of pipe structure, and the connecting and locking device comprises a connecting shell and a connecting assembly. The connecting shell extends along the extension direction of a pipe jacking machine, and a limiting groove is formed between the connecting shell and the outer wall of the pipe jacking machine. The connecting assembly comprises a connecting rod, a plug-in rod, a connecting pivot, a locking piece and a telescopic driving structure. One end of the plug-in rod is in plug-in cooperation with the limiting groove, the other end of the plug-in rod extends out of the limiting groove and is hinged to the connecting rod through the connecting pivot. The end of the connecting rod away from the plug-in rod is hinged to the side wall of a pilot pipe through a hinge shaft. The telescopic driving structure is connected to the middle part of the connecting rod. The telescopic driving structure can drive the connecting rod to rotate around the hinge shaft. The locking piece can lock or unlock the connecting pivot, so that the plug-in rod can be fixed or rotated relative to the connecting rod. The multi-angle connection between the pilot pipe and the pipe jacking machine can be adapted, the adjustment efficiency of the connection posture of the pilot pipe and the pipe jacking machine is improved, and the connection precision and the connection reliability are improved.

The utility model relates to cement pole flange reinforcing technical field, and disclose a kind of conical cement pole flange reinforcing structure, including flange plate one, the bottom side of flange plate one is provided with radial support subassembly, the outside sleeve joint of radial support subassembly has conical cover, the sidewall of radial support subassembly is connected with reinforcement rib subassembly and is penetrated, the bottom end of radial support subassembly is fixedly connected with flange plate two, the upper end of flange plate one the conical cover is welded with welding frame. Through radial support subassembly through vertical passage one, circular buffer ring and vertical passage two form elastic support system, both can pass through rigid channel transmission axial load, and circular buffer ring of rubber material can also be used to absorb radial impact force, reduce stress concentration to the damage of cement pole;Radial rod, oblique rod and annular reinforcement rib in reinforcement rib subassembly constitute three-dimensional rigid network, can effectively disperse axial tension, pressure and torque, improve structure overall deformation resistance.

The utility model relates to mould accessory technical field, and disclose a kind of slider track extension mould frame, the utility model is by slider track extension, and the size of mould frame body remains unchanged, while meeting the length demand of slider track, avoid the increase of mould frame size.This, reduce the consumption of mould frame material, reduce processing cost, while also facilitate the transportation, installation and use of mould frame, improve the overall economy and practicality of mould, the length of slider track is greater than the length of traditional and the slider track matched with this mould frame body, can provide longer distance guiding and support for longer stroke slider, effectively avoid the problems such as deviation, shaking of slider in sliding process, ensure the accuracy and stability of slider movement, improve the machining precision and production efficiency of product, good compatibility, connecting structure is fixed by bolt on mould frame body, and connecting mode is simple and reliable, easy to install and disassemble, and high strength wear resistance is good.

The utility model relates to an automobile trunk lid which comprises a trunk lid outer plate. The trunk lid inner plate is fixed on the inner side of the trunk lid outer plate; the hinge reinforcing plates are arranged on the two sides of the trunk lid inner plate; the lock catch reinforcing plate is arranged at the bottom of the trunk lid inner plate; the structural adhesive is arranged between the trunk lid outer plate and the trunk lid inner plate and used for connecting the trunk lid outer plate and the trunk lid inner plate; the glue blocking ribs are arranged on the two sides of the structural glue. Compared with the prior art, the utility model has the advantages of effectively controlling the thickness of the structural adhesive, ensuring the connection strength and the sealing property of the product and the like.

This invention discloses a millable composite casing sub for side-drilling window opening, its preparation method, and its application. The millable composite casing sub comprises the following components: a matrix, a lubricating phase, and brittle phase reinforcing particles; the matrix is ​​an aluminum alloy matrix; the lubricating phase is graphite particles; and the brittle phase reinforcing particles are brittle mineral particles. During side-drilling window opening operations, an integrated hydraulic directional device is seated inside the lower steel casing below the casing sub. A gyroscope is used for precise orientation, and then a milling cone is lowered to perform side-drilling window opening. The sub body is milled using the milling cone to form the initial window. This invention, while ensuring the overall connection strength and sealing of the wellbore, locally alters the millability of the casing material at the planned window opening point. Through material and structural innovation, it replaces traditional steel casing, shortens the operation cycle, reduces the difficulty of milling operations, and extends the service life of the milling cone, thereby achieving high efficiency, low cost, and safety and reliability in window opening operations.