106results about How to "Avoid uneven force" patented technology

The utility model discloses a self-stress compensation type ultra-long concrete anti-crack supporting device, and belongs to the technical field of supporting devices, the self-stress compensation type ultra-long concrete anti-crack supporting device comprises a bottom plate, and an H-shaped steel frame is arranged above the bottom plate; the fixing cylinders and the telescopic rods are arranged to form the telescopic supporting legs, the two telescopic supporting legs form a main body supporting system, the main body supporting system is matched with the rigid supporting characteristic of the H-shaped steel frame to effectively disperse the load during concrete pouring, the supporting mechanisms are arranged, and therefore the telescopic rods can synchronously support the two sides of the H-shaped steel frame, and the concrete pouring efficiency is improved. The two telescopic rods are fixedly connected together through the cross beam to form a whole, so that the hydraulic jacking mechanism drives the cross beam to achieve height adjustment of the main body supporting system, accurate control is achieved, stress uniformity is guaranteed, and the stability of the supporting system is improved. And the situation that self-stress distribution in the structure is changed due to uneven stress before the concrete structure is not completely hardened is avoided, the construction quality is ensured, and cracks are prevented.

The invention belongs to the technical field of bridge steel shell hoisting construction, and particularly relates to a fine adjustment device suitable for stability of a gravity center changing curve type steel shell, the fine adjustment device comprises a steel shell, mounting angle blocks are symmetrically arranged on the side face of the upper end of the steel shell, and an adjusting mechanism is arranged at the upper end of each mounting angle block. According to the fine adjustment device, a flexible adjustment structure composed of the magnetorheological elastomer and the electromagnetic coil is arranged, and a steel cable traction adjustment mechanism driven by the hydraulic motor is combined, so that bidirectional precise regulation and control over the stability of the steel shell are achieved, and the shear modulus of the magnetorheological elastomer can be linearly regulated and controlled through the current of the electromagnetic coil; the stress change caused by gravity center shift can be quickly responded, and the dynamic unbalance force can be counteracted in real time.

This utility model discloses a fracture-resistant bolt connection pair structure for long-span steel bridges, including a bolt body, an anti-loosening nut assembly, an anti-corrosion washer assembly, a first steel bridge connection plate, and a second steel bridge connection plate. This utility model relates to the field of steel bridge connection structure technology. This fracture-resistant bolt connection pair structure for long-span steel bridges forms a dual stress dispersion structure through a tapered connector between the bolt head and the bolt segment, and four U-shaped stress relief grooves on the bolt segment. This significantly reduces the stress concentration coefficient at the bolt connection, preventing fatigue crack initiation under long-term alternating loads. Simultaneously, the main nut and auxiliary nut, in conjunction with an annular boss, compress the nitrile rubber elastic bushing, continuously compensating for preload attenuation caused by vibration, achieving a preload retention rate of over 90%. This solves the problem of uneven bolt stress caused by loosening of traditional nuts. It ensures the fracture-resistant performance of the bolt connection pair from both "fatigue resistance" and "loosening prevention" dimensions, meeting the core stress requirements of long-span steel bridges.

The invention provides a double-layer jacquard fabric interlayer weaving process and a double-vision artistic effect realization method, and the method comprises the following steps: providing warp yarns, weft yarns and interlayer connecting yarns which are adaptive to double-layer jacquard, and the breaking strength of the interlayer connecting yarns is not less than 3.2 cN / dtex; the method comprises the following steps: importing surface layer jacquard pattern data and inner layer jacquard pattern data into a pattern weaving CAD system, presetting a yarn interweaving threshold value and pattern edge transition parameters of an interlayer connection area, generating a collaborative weaving data table of surface and inner layer jacquard and interlayer connection, marking corresponding interweaving areas of surface layer patterns and inner layer patterns, and carrying out collaborative weaving; the collaborative weaving data table comprises intervention opportunities and interweaving frequency parameters of connecting yarns in each region; according to the invention, by switching the connecting structure in different periods, adapting to the characteristics of the jacquard area and combining the parameters of the connecting yarn and the limitation of the interweaving depth, the complete concealment of the connecting points, the accurate alignment of mirror image jacquard of the surface and inner layers, the control of the dislocation amount within 0.15 mm and the complete and non-split double-visual effect are realized, and the visual requirements of high-end fabrics are met.

The present application discloses a sock pickup device for hosiery machine with axial pushing and radial stretching, which comprises pickup needles for picking up sock loops in cooperation with knitting needles of the hosiery machine; the pickup needles are arranged in a ring shape in the needle slots of the needle disc to form a pickup needle ring; the pickup needle ring is subjected to an inclined first driving force in the axial direction through the bearing surface of the pickup needles, and the pickup needles of the pickup needle ring are driven to move along the needle slots from the needle disc axis to away from the needle disc axis; the pickup needle ring is subjected to a second driving force in the radial direction, and the second driving force drives the pickup needles of the pickup needle ring to move along the needle slots from away from the needle disc axis to close to the needle disc axis; and the first driving force is generated by the pressing ring. The present application drives the pickup needles with bearing surfaces to move radially by the inclined first driving force generated by the pressing ring, and realizes the radial reciprocating movement of the pickup needle ring in cooperation with the second driving force, so that all the pickup needles of the pickup needle ring are subjected to synchronous force to avoid pickup missing.

This invention provides a satellite lifting auxiliary mechanism and method, relating to the field of satellite ground assembly technology. The invention includes an inclined support assembly and a ring support assembly. First, the satellite is placed within the ring space of a ring-shaped component. Then, the lower end of the inclined support rod is connected to the lifting point at the bottom of the satellite, and the upper end of the inclined support rod is connected to the ring component, forming a radial support structure. This support structure is connected to external lifting equipment via lifting lugs, allowing for stable lifting of the satellite. The evenly distributed circumferentially arranged inclined support rods and lifting lugs ensure balanced force on the satellite during lifting, solving the problem that conventional lifting methods cannot be used at the lower lifting point of the satellite. This invention features a simple and stable structure, adaptable to various satellite configurations. Simultaneously, the evenly distributed circumferential support structure ensures a stable lifting process, avoids uneven force distribution on the satellite, and allows for reuse, improving ground assembly efficiency.

The application discloses a modular cable hanging device and a use method, and belongs to the technical field of mine machinery. The device comprises a hanging mechanism, two supporting mechanisms are arranged on the hanging mechanism, the hanging mechanism comprises three hangers, a falling-prevention assembly is arranged above the hangers, and a cleaning assembly and a driving assembly are arranged in the falling-prevention assembly. The driving assembly can change the cable hanging position through forward rotation or reverse rotation, so that the fatigue damage of the cable caused by repeated bending during movement is avoided, the risk of cable breakage is effectively reduced, the service life of the cable is prolonged, and the cleaning assembly can reciprocally rotate in cooperation with the arc-shaped inclined strips during the switching of the clamping position, so that the dust on the surface of the cable can be quickly cleaned. In addition, the cleaning assembly can clean the surface of the cable in a large range as the clamping position of the cable is switched to different lengths, and the running safety and maintenance convenience of the cable are improved.

The utility model discloses an iron core and transformer with cushion block structure are provided, and the iron core with cushion block structure comprises core body, coil and cushion block subassembly, and the coil is positioned by the step cushion block of end abutment, and the first step portion and the second sleeve joint portion of beam body are installed in the clamping. The transformer, including shell, lid and the iron core with cushion block structure of winding, the iron core with cushion block structure is set up in the shell, and the shell is sealed with the lid, and the input terminal and the output terminal are arranged on the lid, and the input terminal and the output terminal are connected with the iron core with cushion block structure respectively. The utility model discloses an effect that the coil installation fixed effect is good, and the sliding displacement is not easy.

The utility model belongs to graphite tool fixture technical field especially is a graphite tool fixture, including base, the upper surface fixed connection of base has workstation, the both sides of workstation are all set up with the sliding slot, the upper surface middle part fixed connection of base has fixed base, the upper surface both sides of fixed base are all fixed connection with slide rail, both sides of two slide rails are all slidingly connected with the sliding block, the upper surface fixed connection of two groups of sliding blocks has the connecting plate, one side of two connecting plates is all fixed connection with the fixed frame. The utility model discloses through drive electric telescopic link drive fixed plate sliding, make it pull the connecting plate and make the sliding block slide on the slide rail, and two connecting plates cooperate with the meshing mode of bilateral rack one and central fixed gear, can drive two connecting plates to move inwards simultaneously, realize the symmetrical clamping to work piece, avoid the stress uneven problem that partial clamping brings, improve the positioning accuracy, improve the clamping stability in the processing process.

This utility model discloses a hydraulic gate opener cylinder with an anti-bending structure, comprising: a cylinder body, the upper side of which is tightly fitted with an end cap, and the end cap and the cylinder body are connected by fastening screws arranged in an array; further comprising: an anti-bending mechanism for increasing rigidity is provided inside the cylinder body, and reinforcing ribs are provided on the outer side of the cylinder body, arranged in an array; a rigid support mechanism for connection is provided on the outer side of the cylinder body, and an annular sleeve is provided on the outer side of the cylinder body. In this hydraulic gate opener cylinder with an anti-bending structure, the piston rod is slidably connected to the cylinder body through a bushing, forming a rigid support point to distribute lateral loads and achieve an anti-bending effect. The hollow rod is slidably connected to the connecting rod, thereby limiting further radial displacement of the piston rod and avoiding uneven force due to excessive clearance, thus improving the overall anti-bending capacity of the cylinder.

This invention discloses a plastic box turning device for an assembly line, comprising a belt conveyor line, a base at the bottom of the belt conveyor line, side plates on the top of both sides of the base, and a lifting seat on the side of the side plates that are far apart from each other. The assembly line plastic box turning device also includes a clamping assembly positioned above the belt conveyor line. This invention relates to the field of plastic box production equipment technology. Through the cooperation of the belt conveyor line, base, side plates, lifting seat, clamping assembly, spacing adjustment assembly, and guide limiting assembly, plastic boxes conveyed to a designated position are fixed by clamping. Driven by a servo motor, the clamped plastic boxes are turned 180 degrees, realizing automated turning of plastic boxes and meeting the turning and conveying needs of plastic boxes of different specifications. This ensures the smooth conveying of the turned plastic boxes to subsequent processes, improving overall production efficiency and product qualification rate.

This utility model relates to the field of power supply device technology and discloses a power cord anti-pull fixing device, including a cable and a rectangular cover. The cable passes through a circular hole. A limiting component is provided inside the rectangular cover cavity, including a first clamping unit and a second clamping unit. A fixing unit is provided between the first clamping unit and the rectangular cover cavity. A compression unit is provided between the second clamping unit and the rectangular cover cavity. By setting up components such as an arc segment, a first hanging plate, a second hanging plate, a tension spring, a second crossbar, a slide, a guide rod, and a compression spring, the arc segment deformation provides initial buffering, the tension spring stretches to generate a reverse elastic force to disperse the pulling force, and the second crossbar slides along the slide to compress the compression spring to form secondary buffering. The guide rod ensures stable movement direction and avoids deviation from the force. The double elastic buffering structure significantly improves the anti-pull protection effect of the cable and effectively reduces the risk of the cable being pulled apart.

This utility model relates to the field of rooftop tents, and in particular to a soft-top quick-opening rooftop tent, comprising a first base plate and a second base plate and a connecting frame rotatably connected. A first tent fabric is provided on the first base plate, the second base plate, and the connecting frame. The first tent fabric includes a front cover portion. A support frame is provided on the first base plate. The support frame includes an extension rod, a top support rod, a first rotating rod, a second rotating rod, and a linear drive device. One end of the extension rod is rotatably connected to the first base plate, and the other end of the extension rod is rotatably connected to the top support rod. The first rotating rod is rotatably connected to the extension rod, and the second rotating rod is rotatably connected to the top support rod. The first rotating rod and the second rotating rod are rotatably connected to each other. One end of the linear drive device is rotatably connected to the extension rod, and the other end of the linear drive device is rotatably connected to the second rotating rod. The rotation centers of the extension rod and the top support rod are biased towards the side closer to the rotation centers of the first rotating rod and the second rotating rod. This utility model solves the problem of cumbersome operation of rooftop tents.

The application relates to the auxiliary technology field of asphalt sample production and discloses a demolding machine, which comprises a material ejection mechanism for ejecting samples to separate the samples from molds; the material ejection mechanism comprises a fixed part, a driving part and a material ejection part, the fixed end of the driving part is connected with the fixed part, and the driving end of the driving part is connected with the material ejection part; the driving part comprises a plurality of first air cylinders and a plurality of second air cylinders, the plurality of first air cylinders are arranged in a ring array, the plurality of second air cylinders are arranged in a ring array, and the second air cylinders are arranged between the central axis of the fixed part and the first air cylinders; the material ejection part comprises a first material ejection block and a second material ejection block, the first material ejection block is arranged around the edge of the second material ejection block, the first material ejection block is drivingly connected with the first air cylinders, and the second material ejection block is drivingly connected with the second air cylinders. The application realizes stable demolding of samples with different sizes through the switchable double-cylinder driving structure, effectively solves the problem of uneven stress, and significantly improves the finished product rate and production efficiency.

The utility model relates to DIP package wave -soldering fixture technical field, and disclose a kind of DIP package wave -soldering fixture, positioning carrier plate is installed in the upper portion of support frame seat with functional module form, flexible dressing can be carried out to positioning carrier plate according to welding piece specification when working, and connecting installation is carried out to the clamping limit of overturning clamping block buckling limit by stopper plate through positioning guide column direction support cooperation, and the welding element on the upper portion of circuit substrate is supported by pressing spring, and by elastic pressing, the uneven stress problem caused by component height difference can be avoided, the support limit stability of component and positioning accuracy greatly improve, limit pressing block is connected and installed using sliding slot structure, according to the component distribution situation on the upper portion of circuit substrate, appropriate down pressure support position is selected in the edge portion by sliding adjustment, the limit installation of different specifications circuit substrate can be flexibly adapted, limit pressing block uses elastic down pressure structure, and the stable down pressure limit support of circuit substrate can be realized.

The utility model discloses a kind of PCB board burning test fixture, comprising: fixture body, burning test piece and press-down module, fixture body includes base, guiding positioning piece, buffer elastic member and locating block, guiding positioning piece is worn on base, and one end of guiding positioning piece is connected with locating block, buffer elastic member is connected between base and locating block, locating block is equipped with locating groove;Burning test piece is installed on fixture body, and the connecting end of burning test piece is located on locating groove;Press-down module is located above fixture body, when locating groove is placed with PCB board, press-down module is used to carry out press-down operation to PCB board.Thus, it can be kept steady movement when locating block is under pressure by the cooperation of guiding positioning piece and buffer elastic member, avoid uneven stress of PCB board;It can also absorb excessive pressure by buffer elastic member, prevent the problem of overpressure damage of PCB board, improve production efficiency simultaneously.

The utility model discloses a four point of prefabricated concrete block's even load hoisting structure, including a plurality of groups fixed setting on the hoisting ring of prefabricated concrete component, every group hoisting ring at least includes two, and the inside of every group hoisting ring is provided with a rigid link, and the rigid link passes through all hoisting rings of this group, and the middle part of rigid link is fixedly connected with one end of steel wire rope, and the other end of a plurality of steel wire ropes is concentrated in hoisting equipment lifting point. Both ends of rigid link are fixedly provided with end anti -slip device. Through the even load design of " multiple hoisting ring + rigid link", effectively disperses the concentrated load, and the safe lifting weight of single lifting point is doubled, and successfully breaks through the technical bottleneck of the hoisting of hundred tons class concrete component. The rigid link ensures that a plurality of hoisting rings are uniformly and synchronously stressed, and the end anti -slip device completely eliminates the risk of rod disengagement, and the structure is stressed explicitly, and the safety redundancy is high.

The utility model relates to the technical field of compressor assembly, in particular to a rotary vane compressor pre-assembling rear bearing tool which comprises a bottom plate, a pre-assembling measuring table and a positioning block, and the pre-assembling measuring table and the positioning block are assembled on the bottom plate. The pre-assembly testing table is vertically arranged on the bottom plate and comprises a base body, a first shaft body and a second shaft body which are connected with one another in the axial direction, the base body is provided with an assembly surface for bearing a cylinder body, the shaft diameter of the first shaft body is matched with the short shaft distance of a cylinder body assembly hole, and the rear bearing is assembled on the other end face, deviating from the assembly surface, of the cylinder body; the shaft diameter of the second shaft body is matched with the hole diameter of an assembly hole of the rear bearing; the outer axial surface of the base body is concave inwards to form a positioning groove, the positioning block is movably arranged in the horizontal direction, and one end of the positioning block is clamped in the positioning groove; the horizontal position of the positioning block is adjusted through the matching relation between the positioning block and the positioning groove in the pre-assembling testing table, the pre-assembling testing table and the cylinder body on the pre-assembling testing table are driven to deflect by a small angle, the coaxiality fine adjustment effect between the cylinder body and the rear bearing is rapidly achieved, the adjusting time is shortened, and the assembling efficiency is improved.

This application relates to a turret drive device and a rolling mill. The turret drive device includes a turret shaft mounted on a frame upright and a drive mechanism driven by the turret shaft. The drive mechanism includes: a power source; a first reducer, including an inner ring fixed to the frame upright and an outer ring rotatable relative to the inner ring, the outer ring being linked to the turret shaft; and a connecting member penetrating the frame upright and the inner ring of the first reducer, forming a shear-resistant connection. The solution provided by this application effectively avoids the problems of uneven stress and poor shear resistance caused by traditional threaded connections, and significantly improves the load-bearing limit and operational safety of the turret drive device under heavy-load conditions.

The utility model provides a prefabricated assembly type building stair structure convenient to install, relates to the technical field of assembly type building structures, and aims at solving the problems that a traditional prefabricated stair is complex in connecting joint, insufficient in reliability, mostly integral components and large in size and weight. Comprising a bearing support, a bearing support block, a connecting support column and a bearing support frame, an assembling side groove is formed in the side face of the bearing support, and a bearing clamping block is arranged on the side face of the bearing support; the bearing support block is fixedly mounted on the inner side of the assembly side groove; the connecting supporting columns are arranged on the inner sides of the assembling supporting grooves. The bearing support frame is arranged on the side face of the bearing support through a bearing clamping block, and a mounting open groove is formed in the side face of the bearing support frame. The anti-skid pedal enables the stair tread to carry out anti-skid bearing, the multiple sets of mounted bearing supports are subjected to stress linkage through the connecting supporting columns, the reinforcing supporting columns enable the reinforcing connecting columns to be supported on the side faces of the threaded side columns through the threaded supporting grooves, and the situation that the connecting supporting columns deform due to stress, and the stability of stress linkage of the multiple sets of bearing supports is affected is prevented.

The utility model relates to the technical field of hinge structure design, and discloses a honeycomb plate hinge type adjustable hinge structure which comprises two connecting shafts, connecting plates are rotatably connected to the front sides and the rear sides of the connecting shafts, honeycomb plates are fixedly connected to the bottom sides of the connecting plates at the front ends and the rear ends, and the honeycomb plates are hinged to the connecting shafts. The left end and the right end of the top side of the honeycomb plate are each provided with two threaded grooves, abutting assemblies are arranged in the threaded grooves, and the left side and the right side of the honeycomb plate at the rear end are each provided with a sliding groove. According to the utility model, the screw rod can be driven to rotate through the turn button, the sliding block and the connecting rod are driven to link the honeycomb plate to rotate, and stepless adjustment of the angle of the honeycomb plate at the front end is realized. The design that the rotating button sleeve supports the sliding block at the right end balances stress at the left end and the right end, the problem that stress is not uniform during adjustment of a single screw is solved, it is ensured that the adjustment process is stable and smooth, different feeding path requirements can be accurately met, the adaptability of equipment to complex working conditions is improved, and the device is particularly suitable for production scenes where the feeding direction needs to be frequently adjusted.

The invention belongs to the technical field of strip steel continuous production, and relates to a transition plate welding method and system for heavy gauge galvanized plate welding of a recoiling unit, the system obtains specification parameters of a forward galvanized plate and a backward galvanized plate through a data obtaining module, calls a transition plate parameter library, and selects a non-plating low-carbon steel transition plate body; the process parameter optimization module calculates and outputs the optimal size parameter of the transition plate based on the median transition principle; the first welding control module is used for controlling positioning, clamping, shearing, centering and welding operation in the first welding process; the middle positioning control module is used for controlling the positioning and preparation work of the rear end of the transition plate and the head of the subsequent galvanized plate; the second welding control module is used for controlling clamping, shearing, centering and welding operation in the second welding process; and the post-welding treatment module is used for equipment resetting, loop control and establishment and adjustment of whole-line tension after welding is completed. The welding seam quality can be effectively improved, and the safety risk is reduced.

The utility model relates to the technical field of metal profile processing, in particular to a drawing die and a drawing system, which comprise a die base, and a mounting cavity is formed on the die base; the feeding straightening mechanism comprises a first template, and a feeding straightening through hole is formed in the first template; the forming mold assembly comprises a second mold plate and four forming roller assemblies. A drawing cavity is formed in the second template; a forming through hole is defined by the four forming roller assemblies. The discharging straightening mechanism comprises a third template, and a discharging straightening through hole is formed in the third template; the central axes of the feeding straightening through hole, the forming through hole and the discharging straightening through hole are located on the same horizontal axis. Through the combined action of the feeding straightening mechanism, the forming die assembly and the discharging straightening mechanism, the part, in the forming die assembly, of a material is always kept to be centered, so that the forming uniformity is guaranteed, meanwhile, the service life of the die is prolonged, and the production efficiency of the die is improved.

The utility model discloses a self-anchored nodular cast iron pipe anti-disengaging ring welding tool which comprises a fixed ring, a movable ring and a guide assembly, the fixed ring and the movable ring are connected through the guide assembly, the fixed ring and the movable ring are both arranged to be circular ring pieces with adjusting notches, the two sides of each adjusting notch are connected through a fastening assembly, and the fixed ring is connected with the movable ring through the fastening assembly. The fixed ring and the movable ring are arranged coaxially, and the fixed ring and the movable ring move relatively in the axial direction through the guide assembly; according to the utility model, the welding position is ensured to be fixed in the welding process, the plane of the welding ring can be ensured to be perpendicular to the axial direction of the pipe body, the stress uniformity of the welding anti-falling ring in the pipeline mounting process can be ensured, the concentrated stress of a single point of the welding ring is avoided, and the reliability of pipeline mounting is ensured; and meanwhile, a welding gap in the welding process is fixed, the appearance size of the finally-formed anti-disengaging ring is uniform, the stress requirement is met, and the working difficulty and the working intensity of manual grinding in the later period can be greatly reduced.

This invention relates to the field of food processing equipment technology, and discloses a food processing machine with stable operation, including a mixing cup and a main unit equipped with a motor and a reduction mechanism. The reduction mechanism includes a fixed gear ring, a double gear, a moving gear ring, and a planetary carrier that cooperate with each other. The double gear includes a gear with a shaft hole and a gear shaft passing through the shaft hole. The gear shaft and the motor shaft are arranged side by side, and the motor shaft drives the gear and gear shaft to rotate synchronously. The gear includes an upper gear that meshes with the fixed gear ring and a lower gear that meshes with the moving gear ring. The shaft hole wall is provided with a wear-resistant part, which surrounds the gear shaft to limit the radial movement of the gear shaft. The outer surface of the wear-resistant part is fixedly connected to the shaft hole wall, and a heat dissipation gap is provided between the inner surface of the wear-resistant part and the gear shaft. The axial height h2 of the wear-resistant part and the shaft hole wall height h1 satisfy 1 / 2h1<h2≤h1-2mm. This avoids direct contact between the gear shaft and the shaft hole, provides good wear resistance to the shaft hole, ensures good alignment between the gear and the rotating shaft, and ensures stable operation.

The application discloses a concrete floor reinforcing structure and belongs to the field of building structure reinforcement. The concrete floor reinforcing structure comprises a floor, a reinforcing mechanism is arranged at the bottom of the floor, a steel plate is arranged at the bottom of the reinforcing mechanism, a supporting mechanism is arranged between the steel plate and the floor, the supporting mechanism comprises a prefabricated reinforcing truss, the prefabricated reinforcing truss is fixedly connected with the steel plate, a fixing block is fixedly connected to the surface of the prefabricated reinforcing truss, a high-strength bolt is threadedly connected in the fixing block, and a horizontal adjusting mechanism is arranged on one side of the steel plate. The high-strength bolt is limited by the fixing block, then the high-strength bolt is rotated to enter the interior of the floor, the floor and the prefabricated reinforcing truss are connected, and then the prefabricated reinforcing truss supports and reinforces the floor, thereby avoiding the problem that the traditional floor reinforcing structure is not applicable to rapid construction or space-limited reconstruction projects due to the fact that the steel plate is heavy in weight and needs temporary support, and the practicality is improved.

The invention discloses an existing building outer wall in-situ reinforcing and repairing method, belongs to the technical field of existing building outer wall repairing, and aims to overcome the defect that an existing existing building outer wall in-situ repairing method is poor in anchoring effect. According to the fixing pin with the knocking expansion and grouting functions, connection between the fixing pin and a wall is tighter and firmer through outward expansion of the bent portion of the expansion pipe and grouting operation, the tensile bearing capacity standard value of the fixing pin with the knocking expansion and grouting functions is effectively increased through the reinforcing fixing structure at the inner end, and the problem that the tensile bearing capacity standard value is low in the prior art is solved.

This utility model relates to the field of military equipment technology, specifically to a parachute compartment assembly and clamping device, comprising a positioning plate, a lead screw fixedly mounted on the top of the positioning plate via a bearing seat, an internally threaded block threaded to the outer surface of the lead screw, a sliding column fixedly connected to the outer end face of the internally threaded block, and a parachute compartment disposed outside the sliding column for housing a deceleration parachute; a clamping block, comprising an expansion component for controlling the clamping block to expand outward to adapt to parachute compartments of various sizes, a filling component that automatically fills gaps in the expansion component when it expands outward, and a positioning component for locking the adjusted diameter of the expansion component. By setting up the clamping block, this utility model not only allows for the expansion or contraction of the clamping block without changing tooling when assembling parachute compartments of different sizes, flexibly adapting to parachute compartments of different diameters, but also automatically fills gaps generated during the expansion process, preventing uneven stress on the deceleration parachute.

This invention provides a road pavement impermeability testing device and method, belonging to the field of road testing technology. The road pavement impermeability testing device includes a vehicle platform and a self-lifting measuring mechanism mounted on the vehicle platform. The self-lifting measuring mechanism includes a measuring cylinder, multiple first hydraulic cylinders, a fixing ring, multiple first guide rods, a pressure plate, a rubber sealing ring, and a thin tube. The multiple first guide rods are all slidably mounted through and on the vehicle platform. The fixing ring is fixedly mounted on the top of the multiple first guide rods. The pressure plate is fixedly mounted on the bottom of the multiple first guide rods. The rubber sealing ring is fixedly mounted on the bottom of the pressure plate, and the thin tube is fixedly mounted on the top of the pressure plate. The road pavement impermeability testing device and method provided by this invention have the advantages of high automation, reliable sealing, accurate testing, and convenient operation.

The utility model relates to the technical field of PCB (printed circuit board) mounting structures and plant lamps, in particular to a lampshade for mounting a PCB and a lamp panel type plant lamp free of screw mounting. A lampshade for mounting a PCB (printed circuit board) comprises a body, hooking parts are arranged on two sides of the body respectively, and pressing legs used for abutting against the PCB are further arranged on two sides of the body respectively. According to the lampshade structure for installing the PCB, the PCB lamp panel can be rapidly and firmly buckled and installed on the heat dissipation piece without any screws, smooth attachment and efficient heat dissipation of the lamp panel and the heat dissipation piece are guaranteed, the lens can be integrated in the lampshade body so that light path refraction or light condensation can be achieved, meanwhile, the structure is simplified, cost is reduced, and later maintenance is facilitated.