321results about How to "Ensure connection stability" patented technology

The invention relates to the technical field of wharf construction processing, in particular to a construction method for a front-edge double-pile bearing beam and a berthing component, according to a support building method, hoops are installed on front-edge double-row PHC piles to serve as anchoring points, cantilever beams are welded to the front edge sides of the hoops to serve as structures for supporting the berthing component, and the whole installation mode is simple, convenient and reliable; the double-layer hoops are adopted on the front-edge double-row PHC piles to serve as supports of different layers of structures, so that installation stability is guaranteed, later adjustment can be facilitated, and particularly, the installation levelness of the cantilever beam can be adjusted conveniently. In addition, the cross beams at the upper ends of the front-edge double-row PHC piles are connected through the supporting I-shaped steel oblique beams, so that the connecting stability between the front-edge double-row PHC piles and the rear-row double piles can be guaranteed, and the front-edge double-row PHC piles and the rear-row double piles are matched in different directions. The installation efficiency can be effectively improved by prefabricating the berthing component.

The utility model discloses a combined type double-end drilling tool which comprises a first drill tip and a second drill tip which are oppositely arranged, a first connecting block is arranged at the bottom of the first drill tip, a second connecting block is arranged at the bottom of the second drill tip, a first thread is arranged on the outer side of the first connecting block, and a second thread is arranged on the outer side of the second connecting block. And internal thread connecting pipes are arranged on the outer sides of the first connecting block and the second connecting block. According to the first drill tip and the second drill tip which can be separated, the adaptability of the tool is improved, and a user is allowed to rapidly replace the drill tips according to different operation requirements. And meanwhile, the first connecting block and the second connecting block are connected and fixed through the internal thread connecting pipe, so that the connecting stability is ensured, and the loosening or falling risk in the working process is reduced. The design of the sliding rail and the sliding block ensures that the first drill tip and the second drill tip can be aligned in position when being combined, so that the first drill tip and the second drill tip can be easily connected through the internal thread connecting pipe.

The utility model relates to the technical field of awning steel structures, and discloses a stadium stand awning steel structure which comprises a stand column and a supporting seat, the upper surface of the supporting seat is connected with a rotating handle, a connecting cylinder is installed at the bottom of the supporting seat, and an outer through hole is formed in the surface of the connecting cylinder. A conical insertion rod is connected to an inner cavity of the outer through hole, a rotating shaft is connected to an inner cavity of the connecting cylinder, a fan-shaped pressing plate is installed on the surface of the rotating shaft, arc-shaped side plates are additionally arranged on the two sides of the rotating shaft, and reset springs are arranged between the arc-shaped side plates and the conical insertion rod in a sleeving mode; and an outer connecting hole is formed in the inner wall of the fixed cylinder. According to the steel structure for the awning of the stadium stand, the fixed barrel is fixed to the stadium stand through cast-in-place fixing, the connecting barrel enters the fixed barrel, the rotating handle drives the rotating shaft, the fan-shaped pressing plate rotates along with the rotating shaft to extrude the arc-shaped side plate, and the arc-shaped side plate can drive the conical inserting rod to enter the interior of the outer connecting hole along the outer through hole for connection operation.

The utility model relates to the technical field of batteries, and provides a battery, which comprises a battery shell provided with a pole through hole; the battery cell is arranged in the battery shell; the battery core is electrically connected with the pole assembly, and the pole assembly is fixed on the battery shell by the first bending section and the second bending section; the plugging piece is arranged in the groove, and the plugging piece is connected with the pole assembly in a welding manner, so that a welding mark is formed on one side, deviating from the battery cell, of the plugging piece and / or the pole assembly; at least part of the insulating part is arranged between the pole assembly and the battery shell, the minimum vertical distance between the welding mark and the circumferential outer surface, facing the hole wall of the pole through hole, of the penetrating section is d, and d is larger than or equal to 0, so that the transfer distance of heat on the penetrating section in the welding process can be increased, the probability that the heat is transferred to the insulating part is reduced, and the welding quality of the battery is improved. Therefore, the insulating property and the sealing capability of the insulating part are ensured, and the safe use performance of the battery is improved.

The utility model relates to the technical field of photoelectric connectors, in particular to a butt joint device of a photoelectric connector, which comprises a box body, the top of the box body is open, a double-end screw rod is rotatably mounted in the top opening of the box body, and connecting blocks are in threaded connection with threads at two ends of the double-end screw rod; clamping grooves are formed in the clamping blocks, the sliding rods are sleeved with second springs, and one ends of the second springs abut against the clamping blocks; the two connecting blocks can be driven to synchronously and relatively move by rotating the double-end lead screw, the connecting blocks can drive the two supports to synchronously and relatively move, when the two supports synchronously and relatively move, rapid butt joint of the two photoelectric connectors can be achieved, and under the elastic force effect of the second spring, the two photoelectric connectors can be connected in a butt joint mode. Therefore, the situation that the photoelectric connectors are separated due to pulling of external force is avoided, the connection stability of the photoelectric connectors after butt joint is guaranteed, and normal transmission of optical signals and the stability of a whole optical communication system are guaranteed.

The utility model discloses a table type riveting machine, which relates to the technical field of riveting machines and comprises a material pushing seat, material seats are arranged at two ends of the material pushing seat, a riveting seat is arranged at the front end of the material pushing seat, and after rivets are pushed into the riveting seat from the material seats and the material pushing seat and workpieces penetrate through the rivets, the riveting seat is driven by the riveting seat to rotate. A micro motor drives a driving gear to rotate through a short shaft after working, meshing of the driving gear and a driven gear can drive a long shaft to rotate, a sleeve is limited on the long shaft through a limiting screw to rotate along with the long shaft, and the sleeve is connected with a pressing plate through an extension rod to drive the pressing plate to turn over and press a workpiece. Compared with the prior art, the connecting stability of the workpiece and the rivet in the riveting process is guaranteed, dislocation between the workpiece and the rivet is avoided, meanwhile, the pressing plates are located on the two sides of the workpiece, the contact condition cannot be generated when the riveting end of the riveting machine descends, and therefore the riveting accuracy and the yield of products after riveting are improved.

The application discloses an electric core stacking device, which comprises a base, a reference positioning mechanism, a plurality of electric core grouping mechanisms and a pressing mechanism. The base is provided with a mounting surface, the mounting surface has a first direction and a second direction intersecting with each other, and the reference positioning mechanism is fixedly connected to the mounting surface. Along the first direction, the plurality of electric core grouping mechanisms are arranged in sequence on one side of the reference positioning mechanism, and the electric core grouping mechanisms are movably connected to the base. The electric core grouping mechanisms are used for stacking a plurality of electric cores along the second direction to form an electric core group and moving the electric core group towards the reference positioning mechanism. The pressing mechanism is movably connected to the base and is used for pressing the electric core groups in the electric core grouping mechanisms in sequence, so that a plurality of electric core groups are stacked to form a battery pack. Further, the pressing mechanism can press each row of electric core groups respectively, and the connection firmness between two adjacent rows of electric core groups is ensured.

The invention discloses an embedded automobile AR-HUD integrated display device which comprises an AR-HUD installation shell installed in an automobile instrument desk, a gap between the AR-HUD installation shell and the automobile instrument desk is provided with a sealing assembly, and the sealing assembly comprises a rubber ring with a notch and a rubber strip integrally formed on the outer wall of the rubber ring; the rubber ring is embedded in an automobile instrument desk, mounting grooves are formed in the outer walls of the two sides of the AR-HUD mounting shell, and an upper plate and a lower plate are welded in the mounting grooves. Dust and water vapor are effectively prevented from invading the interior of an instrument desk through a triple sealing assembly of the rubber ring, the rubber strip and the sealing compound, the environmental reliability of an AR-HUD core optical device is improved, quick disassembly of the AR-HUD mounting shell is achieved through installation in an embedded mode, dual limiting can be achieved through the elastic piece and the coil spring, and the service life of the AR-HUD core optical device is prolonged. And when the AR-HUD mounting shell is pressed downwards, clamping and locking can be automatically completed.

The utility model relates to mechanical engineering technical field field discloses a fireproof cable bridge, including base, the inner wall of base is equipped with two installation grooves, the inner wall of two installation grooves is provided with temperature sensing element, the outer wall of temperature sensing element is fixedly connected with baffle, the inner wall of base is equipped with two storage tank, the outer wall of base is equipped with a plurality of fixed slots, the outer wall of base is installed for the connecting device of connection. In the utility model, when the fire needs to be extinguished and fire -retardant, after temperature sensing element senses high temperature, internal thermal expansion liquid expands rapidly and breaks its outer wall, makes baffle fall down and slides out of storage tank along installation groove, makes the fire -retardant material in the groove slide into base and cover cable. If the cable is spontaneous combustion, the fire -retardant material insulates oxygen and extinguishes the fire, forms the protective layer when the outside is on fire and protects the cable, and the structure is simple and reliable, relies on thermal expansion physical principle and mechanical structure linkage, reduces the failure risk.

This invention provides a connection structure for air conditioning pipes, relating to the field of air conditioning pipe connections. It includes: a connecting pipe, a fixing plate, sealing washers, a connecting nut, a connecting platform, a connecting plate, an audible and visual alarm, and a fixing rod. The fixing plate is fixedly connected to the middle of the connecting pipe. The connecting nut is threadedly connected to the left and right sides of the connecting pipe. The sealing washers are located on the left and right sides of the connecting pipe. The connecting platform is fixedly connected to the outside of the connecting nut. The connecting plate is threadedly connected to the outside of the connecting platform. The audible and visual alarm is fixedly connected to the outside of the connecting plate. The fixing rod is fixedly connected to the middle of the connecting pipe. This invention avoids situations where the connection lengths of the copper pipes on both sides differ excessively, ensuring the tightness of the air conditioning pipe connection, improving the connection effect of the air conditioning pipe, and enhancing the usability of the connection structure. It solves the problem that existing connection structures easily affect the connection effect of air conditioning copper pipes and the usability of the connection structure itself.

The present application relates to the technical field of electric control switch, in particular to a kind of motorcycle disc brake control switch, including shell, two wiring copper sheets, electricity connection copper sheet, slider and cover plate, installation cavity is provided in the shell, installation groove is opened in the symmetrical two inner side walls of installation cavity, and two The wiring copper sheet is fixedly inserted in installation groove;The present application is closed by the setting of cover plate and sleeve, the part of wiring copper sheet in installation cavity is isolated with external environment with electricity connection copper sheet, and the inside of the position of wiring copper sheet through shell can be sealed with sealing glue, simultaneously still can be filled into inert gas in installation cavity, to avoid the water vapor in environment into installation cavity, cause the part of wiring copper sheet in installation cavity and electricity connection copper sheet corrosion Problem, guarantee the conductive property of wiring copper sheet and electricity connection copper sheet, guarantee the stability and waterproof performance of motorcycle disc brake control switch.

This invention relates to the field of quick-change structure technology, providing a nozzle quick-change structure for rapid assembly and disassembly of the nozzle and mounting base. The structure includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle, and the locking disc is rotatably connected to the mounting base. One side of the locking disc has a spiral-shaped locking groove with a notch communicating with its outer circumferential surface, allowing the locking pin to be inserted into the groove. When the locking disc rotates in one direction, it presses the locking pin firmly. The outer circumferential surface of the locking disc has ratchet teeth, and a pawl is located on one side of the locking disc and connected to the mounting base. When the locking pin is pressed, the pawl and ratchet teeth engage to restrict the locking disc from rotating in the opposite direction. This invention effectively solves the problems of cumbersome assembly and disassembly and the long time consumption associated with traditional screw connections, ensuring connection stability and significantly improving the efficiency of nozzle replacement during inspection operations.

The utility model belongs to the technical field of camera installation of goods shelves of supermarkets and supermarkets, and discloses a camera fixing device which comprises a fixing assembly, a battery box assembly, a connecting piece and a support assembly, the fixing assembly comprises a fixing plate and a magnet block, the fixing plate is provided with an installation hole, and the magnet block is arranged on the fixing plate and can be attracted to the surface of the goods shelf; the battery box assembly comprises a box body provided with an accommodating cavity and a sealing head, and the sealing head is connected to the end part of the box body and is provided with an inserting hole communicated with the accommodating cavity; the connecting piece comprises a head part and a rod part, the rod part is fixedly connected to the box body, and the head part can penetrate through the first hole part and is prevented from falling off the second hole part; the support assembly comprises a stand column and an installation arm, one end of the stand column is connected to the fixing plate, the other end of the stand column extends into the second channel and is connected to the installation arm, the camera is inserted into the second channel and clamped to the installation arm, and the insertion hole, the first channel and the second channel are sequentially communicated and provided with a cable in a penetrating mode. The battery box is simple to mount, and the battery box component is convenient to dismount.

The utility model relates to domestic appliance technical field discloses domestic appliance, include: first shell body is equipped with first installation mouth and second installation mouth, first installation mouth is along axial direction and is arranged at one end of first shell body, and second installation mouth is arranged on the lateral wall of first shell body. Head assembly includes drive motor, and head assembly is detachably arranged in first shell body through first installation mouth. First connecting structure is arranged on head assembly. Second connecting structure is arranged in first shell body, and second connecting structure is rotatably clamped with first connecting structure. One end of locking structure is connected on head assembly, and the other end has the locking position of extension in second installation mouth, and the unlocking position of second installation mouth is taken off. The utility model discloses domestic appliance, and the first shell body and head assembly between convenient dismounting, locking structure also is convenient for internal locking, also is convenient for unlocking, prevents the first shell body and head assembly from being damaged when dismounting.

The utility model discloses a support device for engineering surveying relates to engineering surveying technical field, including installation platform, telescopic support foot and total station, the number of telescopic support foot is three, and all rotationally connected in installation platform lower extreme a week, total station sets up installation platform top, and with installation platform swing joint. The utility model discloses the cooperation of installation platform, telescopic support foot, total station, docking groove, placement groove, fixing device, clamping joint assembly, linkage control mechanism, linkage, control self -locking spare, worm, knob, docking seat, draw -in groove and packaging board is used, need not work piece and screw thread cooperation can realize total station quick docking installation and disassembly, shorten operation preparation time, and can avoid the problem of the thread abrasion, improper operation and cause the silk and structural damage, connect stablely simultaneously, and the total station accidental drop possible of great reduction.

This invention relates to the field of IoT management platform technology, specifically to a management platform based on IoT system integration. It enables centralized management and control of various devices and sensors, improving device utilization and management efficiency. It provides a unified interface for user convenience and management, reducing the difficulty of use. By processing and analyzing data generated by devices and sensors, useful information is extracted to support decision-making. It provides security protection for connected devices and sensors, improving system security and reliability. Furthermore, in signal transmission, this invention uses a signal transmission stabilization auxiliary component on the side of the signal interface of the signal transceiver to work in conjunction with the connector plug, preventing loosening of the connection due to dragging or touching, ensuring connection stability, and thus guaranteeing the overall stable operation of the management platform.

The utility model discloses a novel multifunctional traction tow hook, which belongs to the technical field of tow hooks, and comprises a mounting buckle, a hook ring and a connecting component, and the mounting buckle is used for connecting a cross rod at the tail of a forklift; the shackle is mounted at the end part of a frame of the flat car; the connecting assembly is used for connecting the mounting buckle and the shackle and comprises two connecting rods and two mounting blocks, and the two connecting rods are kept parallel and are rotationally connected with the two mounting blocks respectively to form a movable parallelogram structure; wherein one mounting block is fixedly connected with a mounting buckle, and the side wall of the other mounting block is provided with a connecting structure used for being connected with a shackle. According to the novel multifunctional traction tow hook, through a parallelogram structure formed by the connecting assemblies, large-range connection height adjustment is achieved, and the height difference between a forklift and a flat car does not become a connection obstacle any more.

This utility model discloses a structurally stable and easy-to-install drying rack, including a first leg, a second leg, a first shelf, a second shelf, and a folding assembly. The upper ends of the first and second legs are hinged together, and the lower ends of the first and second legs unfold and support the ground. The first and second shelves are correspondingly hinged to the first and second legs. A first tube is fitted onto the first shelf through a first sleeve hole; a second tube is fitted onto the second shelf through a second sleeve hole. When the shelf and the leg unfold simultaneously, the second tube flips downward and unfolds around its hinge point with the first tube, embedding itself in the limiting groove of the first tube. When the shelf and the leg fold simultaneously, the second tube flips upward and folds out of the limiting groove, using its hinge point with the first tube as a fulcrum. This improves the overall structural strength and stability of the drying rack, reduces replacement costs, and makes the assembly and disassembly of the drying rack more convenient.

The application discloses a novel end device of a surgical robot system, which comprises a parent control module and a child tool module detachably installed on the parent control module; a plurality of positioning holes are arranged on the end face of the parent control module towards the child tool module; a plurality of positioning pillars for identifying the model of a surgical tool are arranged on the end face of the child tool module towards the parent control module; when the plurality of positioning pillars on the child tool module are inserted into the plurality of positioning holes on the parent control module, the parent control module identifies the model of the surgical tool of the child tool module by judging the layout style and / or length of the inserted positioning pillars. The end device of the application can be installed on the mechanical arm of the surgical robot to realize intelligent identification.

The application relates to the technical field of building materials, and discloses an L-shaped ALC corner wallboard, which comprises a corner reference plate and a corner adjusting plate, the corner adjusting plate is arranged on one side of the corner reference plate, one side of the corner reference plate is provided with a circular arc surface, the corner adjusting plate is provided with an arc-shaped groove, the inner wall of the arc-shaped groove is in contact with and matched with the circular arc surface, the installation and connection of the corner reference plate and the corner adjusting plate are completed in the mode that circular clamping blocks and connecting pieces are clamped, the strip-shaped pressing plate is driven to move by rotating the lower pressing disc, the position of the pressing plate is adjusted, the pressing plate is away from the corresponding circular clamping block, the corresponding two circular clamping blocks are away from the connecting spherical body, the connecting spherical body can be taken off from the circular clamping block, and the corner reference plate and the corner adjusting plate can be disassembled and replaced.

This utility model provides a vehicle battery connection PCBA wiring harness for use in PCBA wiring harnesses, including a male connector and a female connector. The male connector has elastic claws, and the female connector has a locking post. The locking post includes a tapered end and a column. The tapered end has a notch and a mounting groove, and the column has several equally spaced spiral grooves. The female connector contains ball bearings, and a tension spring is fixed between the locking post and the female connector. Two sets of elastic claws are symmetrically fixed to the bottom of the male connector. An unlocking block is slidably connected to the top of the male connector, and an elastic insulating pad is clamped between the unlocking block and the male connector. The unlocking block extends to both sides of the elastic claws and is fixed with an arc-shaped baffle. This utility model can effectively resist vehicle vibration and ensure connection stability through the locking structure of the locking post and claws. Unlocking can be achieved simply by lifting the unlocking block, making the operation simple and convenient, and facilitating later maintenance and wiring harness replacement.

The utility model relates to a kind of suspension bed frame and the suspension soft bed of application thereof, solve the problem that the supporting leg of bed frame or bed product is exposed and affects visual effect existing in prior art, the technical scheme used is: including bed board, the supporting leg of supporting bed board, and the bed backrest being set in the one end of the bed board, it is characterized in that the three edges of the bed board are provided with the bed frame enclosed by left side plate, right side plate and tail plate, the bed backrest closes the opening of the bed frame, the lower end of the bed frame is higher than the lower end of the supporting leg, and the bed frame hides the supporting leg.Its effect: by bed backrest and bed frame cooperation, so that bed frame or bed product is used, supporting leg is hidden in the interior of bed frame, not bare, form "suspension" effect, to improve the overall quality of bed frame, bed product and bed product use space.

The utility model relates to the technical field of clamps, in particular to a quick-opening clamp structure of a miniature reaction kettle. The kettle comprises a quick clamping assembly, a kettle body and a kettle cover are connected through the quick clamping assembly, and an anti-loosening assembly and a fixing assembly are arranged on the quick clamping assembly. Through the design of the quick clamping assembly, the kettle body and the kettle cover are extremely simple, convenient and quick to connect and disassemble, the left half lantern ring shell and the right half lantern ring shell are connected through the first rotating shaft, an operator only needs to manually rotate the right half lantern ring shell to realize opening and closing of the lantern ring, and compared with a traditional complex connecting mode, the connecting structure has the advantages that the structure is simple and convenient; the operation time and the labor cost are greatly saved, and the working efficiency can be remarkably improved especially in an experiment or production scene where the reaction kettle needs to be frequently opened and closed.

The utility model discloses an assembly type building light top span beam structure, and particularly relates to the technical field of assembly type buildings, the assembly type building light top span beam structure comprises a first beam body and a second beam body, the first beam body is located on the left side of the second beam body, and a positioning hole is formed in one side of the first beam body; the upper side of the second beam body is fixedly provided with a positioning rod through a welding process, the size of the positioning rod is matched with the size of the positioning hole, during transportation, due to the fact that light materials are adopted and the structure is optimized, the weight of the span beam is greatly reduced, large-scale high-load-bearing transportation equipment and common vehicles are not needed, cost is reduced, and the requirement for route bearing is lowered; route selection is more flexible, complex terrain traffic can be adapted, transportation convenience is improved, during installation, the light span beam has more obvious advantages, large hoisting equipment, small equipment or manual assistance are not needed, operation difficulty is lowered, dependence on personnel skills and command ability is reduced, accident risks are reduced, and project cost is saved.

The application provides a pure electric new energy driven automobile motor shell sealing type mounting structure, and relates to the technical field of new energy vehicles, comprising an outer shell body, an end cover body, a self-adaptive multiple sealing structure, an operating port sealing structure and an inner multiple point locking mechanism; the application has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions; through the multiple sealing and self-adaptive structure, double sealing of the end face and the side face is realized, the slight offset of the end cover and the shell during butt joint can be self-adapted, the sealing reliability is effectively improved, the invasion of external dust and water vapor can be blocked, and the operation safety of the internal components of the motor is ensured; the application adopts a multiple point synchronous locking structure, can realize uniform pressing of the end cover and the shell, avoids stress distortion of the end cover, is equipped with a reliable self-locking structure at the same time, can prevent loosening of the locking components, ensures the connection stability, and meets the use requirements of the vehicle-mounted vibration environment.

The utility model relates to loudspeaker technical field especially relates to a dustproof waterproof micro loudspeaker. It includes installation main shell, is provided with loudspeaker main body spare in the installation main shell, is provided with dustproof waterproof subassembly in the installation main shell top screw thread, is provided with first dustproof shell in dustproof waterproof subassembly top screw thread. The dust screen one (the larger number of meshes) of utility model top setting filters big particle dust first, the dust screen two (the smaller number of meshes) of outer layer further blocks fine dust, forms the double protection of rough filter plus fine filter, avoids the dust accumulation influence loudspeaker sounding efficiency, and the threading groove of installation main shell bottom is covered by fixed shell, and the inside seal plug passes through the elastic extrusion package connecting line, prevents dust from entering the shell inside from the line interface, ensures that loudspeaker main body spare is long -term clean.

The foot pad comprises a vibration reduction body installed on a shell, the vibration reduction body comprises a first-stage vibration reduction face and a second-stage vibration reduction face, the shell is provided with a first contact face and a second contact face, the first-stage vibration reduction face abuts against the first contact face, and the second-stage vibration reduction face has an initial state and an abutting state abutting against the second contact face. In the initial state, a vibration reduction gap exists between the second-stage vibration reduction face and the second contact face. The water purifier comprises a shell and a foot pad arranged at the bottom of the shell. The foot pad comprises the vibration reduction body provided with the first-stage vibration reduction face and the second-stage vibration reduction face, when the shell is subjected to vibration and transmits vibration to the vibration reduction body, the vibration is transmitted to the vibration reduction body through the first contact face and the first-stage vibration reduction face which abut against each other, the vibration is subjected to kinetic energy reduction in the transmission process, preliminary vibration reduction is achieved, and the vibration reduction effect is improved. Along with continuous vibration, the first-stage vibration reduction face is stressed and compressed to deform, so that the second contact face abuts against the second-stage vibration reduction face, and vibration is greatly weakened.

The utility model discloses a universal connecting device for preventing a lead from loosening. The universal connecting device comprises a shell main body, a universal main clamp, a top block, a fixed block, a first screw, a second screw, a lead half frame, a bottom cover, a spring and the like. A universal main clamp is mounted in the shell main body, two grooves are formed in the universal main clamp, a first limiting groove and a second limiting groove are formed in each groove, two fixing blocks are mounted through the first limiting groove, and two ejection blocks are slidably connected through the second limiting groove; a lower shell and an upper shell are installed on the front side wall and the rear side wall of the shell body correspondingly, and a spring is arranged between the top block and the fixing block. Through the above structure, the lead loosening prevention device can effectively prevent the lead from loosening, has good versatility and overcurrent capability, is suitable for connection of leads of various specifications, is convenient to install and maintain, is compact and reasonable in structure, and can prolong the service life.

The application relates to the aluminum alloy door and window processing technical field, in particular to a glue injection device for aluminum alloy door and window frame processing, which comprises a frame positioning unit and a controller, a transmission mechanism is arranged in the frame positioning unit, the transmission mechanism comprises a transmission seat, moving frames are arranged at the left and right ends of the transmission seat, a transmission assembly for realizing the mutual approaching or moving away of the two moving frames is arranged in the transmission seat, longitudinal plates are arranged at the upper ends of the moving frames, glue injection mechanisms which are aligned with glue injection holes at the front and back ends of the frame are arranged at the front and back ends of each longitudinal plate; glue injection amount sensing assemblies are arranged at the front and back ends of the longitudinal plates; the glue injection device disclosed by the application realizes automatic glue injection of the aluminum alloy frame, reduces the labor intensity, improves the glue injection efficiency, and during the whole glue injection process, the frame profile connecting part is fully injected with glue, the connecting stability and the sealing performance of the whole frame are ensured, glue injection overmuch waste can be avoided, and the glue injection effect on the aluminum alloy door and window frame is excellent.

This invention discloses a double-row pile retaining structure for foundation pits and its construction method, aiming to provide a double-row pile retaining structure for foundation pits with good deformation control, strong resistance to earth pressure, and high stability. A double-row pile retaining structure for foundation pits includes: a front row of piles, which are set in the soil; a front row of pile capping beam, with the top of the front row of piles connected to the front row of pile capping beam; a rear row of piles, which are set in the soil, with the front row of piles located between the rear row of piles and the foundation pit; a rear row of pile capping beam, with the top of the rear row of piles connected to the rear row of pile capping beam; a tie beam, connecting the front row of pile capping beam and the rear row of pile capping beam; and lapped steel sections, which are inserted into the soil, the lapped steel sections are inclined, the lower end of the lapped steel sections is connected to the rear row of piles, and the upper end of the lapped steel sections is connected to the tie beam or the front row of pile capping beam.